/* roulang page: index */
:root {
            --ink: #151A22;
            --primary: #FF5A36;
            --primary-dark: #E8451E;
            --accent: #00C2A8;
            --accent-dark: #009A86;
            --bg: #F5F7FA;
            --bg-white: #FFFFFF;
            --bg-dark: #151A22;
            --text: #1F2937;
            --text-secondary: #4B5563;
            --text-muted: #6B7280;
            --border: #E5E7EB;
            --border-strong: #D1D5DB;
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 18px;
            --radius-pill: 999px;
            --shadow: 0 8px 24px rgba(0,0,0,0.06);
            --shadow-hover: 0 14px 36px rgba(0,0,0,0.10);
            --shadow-lg: 0 20px 50px rgba(0,0,0,0.12);
            --shadow-primary: 0 10px 28px rgba(255,90,54,0.28);
            --transition-fast: 0.18s ease;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            --font-mono: "Inter", "SF Mono", system-ui, monospace;
            --section-padding: 84px 0;
            --section-padding-mobile: 48px 0;
            --container-max: 1200px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--primary-dark);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            box-shadow: none;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        ul,
        ol {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        button {
            font-family: inherit;
            cursor: pointer;
        }

        input {
            font-family: inherit;
        }

        .container-xl {
            max-width: var(--container-max);
        }

        section {
            padding: var(--section-padding);
            position: relative;
        }

        .section-alt {
            background-color: var(--bg-white);
        }

        .section-dark {
            background-color: var(--bg-dark);
            color: #E5E7EB;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            background: rgba(255, 90, 54, 0.08);
            color: var(--primary);
            border-radius: var(--radius-pill);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }

        .section-label i {
            font-size: 0.8rem;
        }

        h1,
        h2,
        h3,
        h4 {
            color: var(--ink);
            line-height: 1.3;
            font-weight: 700;
        }

        h2 {
            font-size: clamp(1.6rem, 3vw, 2.15rem);
            margin-bottom: 16px;
        }

        h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
        }

        .section-desc {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 720px;
            margin-bottom: 36px;
        }

        /* ============ 导航 ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(21, 26, 34, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
        }

        .navbar {
            padding: 12px 0;
            background: transparent;
        }

        .navbar .navbar-brand {
            font-size: 1.55rem;
            font-weight: 800;
            color: #FFFFFF;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 0;
        }

        .navbar .navbar-brand:hover {
            color: #FFFFFF;
        }

        .navbar .navbar-brand .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--primary);
            border-radius: 10px;
            font-size: 1.1rem;
            color: #FFFFFF;
            flex-shrink: 0;
        }

        .navbar .nav-link {
            color: #B0B8C4;
            font-size: 0.95rem;
            font-weight: 500;
            padding: 8px 16px !important;
            transition: color var(--transition-fast);
            position: relative;
        }

        .navbar .nav-link:hover,
        .navbar .nav-link.active {
            color: #FFFFFF;
        }

        .navbar .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .btn-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            background: var(--primary);
            color: #FFFFFF !important;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-primary);
            white-space: nowrap;
        }

        .btn-nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 14px 34px rgba(255, 90, 54, 0.38);
            color: #FFFFFF;
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 8px 10px;
            box-shadow: none;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 2px rgba(255, 90, 54, 0.6);
            border-color: var(--primary);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255,255,255,0.8%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        @media (max-width: 991px) {
            .navbar-collapse {
                background: rgba(21, 26, 34, 0.98);
                border-radius: var(--radius);
                padding: 16px;
                margin-top: 12px;
                border: 1px solid rgba(255, 255, 255, 0.1);
            }

            .navbar .nav-link {
                padding: 10px 12px !important;
                border-radius: 8px;
            }

            .navbar .nav-link:hover {
                background: rgba(255, 255, 255, 0.06);
            }

            .navbar .nav-link.active::after {
                display: none;
            }

            .btn-nav-cta {
                margin-top: 8px;
                width: 100%;
                justify-content: center;
            }
        }

        /* ============ Hero ============ */
        .hero-section {
            padding: 0;
            min-height: 88vh;
            display: flex;
            align-items: center;
            position: relative;
            background-image: url('/assets/images/7dba5a97f28436d6.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(21, 26, 34, 0.94) 0%, rgba(21, 26, 34, 0.78) 50%, rgba(21, 26, 34, 0.62) 100%);
            z-index: 1;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, rgba(21, 26, 34, 0.9), transparent);
            z-index: 2;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 3;
            padding: 100px 0 80px;
            color: #E5E7EB;
        }

        .hero-title {
            color: #FFFFFF;
            font-size: clamp(2.2rem, 5vw, 3.25rem);
            font-weight: 800;
            line-height: 1.22;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

        .hero-title .highlight {
            color: var(--primary);
            position: relative;
        }

        .hero-desc {
            font-size: 1.08rem;
            color: #D1D5DB;
            max-width: 640px;
            line-height: 1.85;
            margin-bottom: 30px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 32px;
        }

        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            background: var(--primary);
            color: #FFFFFF;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 1rem;
            border: none;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-primary);
        }

        .btn-primary-custom:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 16px 38px rgba(255, 90, 54, 0.42);
            color: #FFFFFF;
        }

        .btn-primary-custom:active {
            transform: translateY(0);
            box-shadow: var(--shadow-primary);
        }

        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            background: transparent;
            color: #E5E7EB;
            border: 1.5px solid rgba(255, 255, 255, 0.45);
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition-fast);
        }

        .btn-outline-custom:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #FFFFFF;
            color: #FFFFFF;
            transform: translateY(-2px);
        }

        .hero-region-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 28px;
        }

        .region-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: var(--radius-pill);
            color: #F3F4F6;
            font-size: 0.9rem;
            font-weight: 500;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            transition: all var(--transition-fast);
            cursor: default;
        }

        .region-tag:hover {
            background: rgba(255, 90, 54, 0.2);
            border-color: var(--primary);
            color: #FFFFFF;
        }

        .region-tag i {
            color: var(--accent);
            font-size: 0.75rem;
        }

        .hero-nearby {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .btn-nearby {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            background: rgba(21, 26, 34, 0.7);
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: var(--radius);
            color: #E5E7EB;
            font-size: 0.9rem;
            font-weight: 500;
            transition: all var(--transition-fast);
            text-decoration: none;
        }

        .btn-nearby:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: var(--shadow-primary);
        }

        @media (max-width: 768px) {
            .hero-section {
                min-height: auto;
            }

            .hero-content {
                padding: 72px 0 56px;
            }

            .hero-desc {
                font-size: 1rem;
            }

            .hero-actions {
                flex-direction: column;
            }

            .btn-primary-custom,
            .btn-outline-custom {
                width: 100%;
                justify-content: center;
            }

            .hero-region-tags {
                gap: 8px;
            }

            .region-tag {
                padding: 6px 14px;
                font-size: 0.82rem;
            }
        }

        /* ============ 倒计时 ============ */
        .countdown-section {
            background: var(--bg);
            padding: var(--section-padding);
            border-bottom: 1px solid var(--border);
        }

        .countdown-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
            margin-top: 20px;
        }

        .countdown-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 26px 22px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all var(--transition);
            text-align: center;
        }

        .countdown-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            border-color: var(--primary);
        }

        .countdown-card .league {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.8px;
            margin-bottom: 10px;
        }

        .countdown-card .matchup {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 6px;
        }

        .countdown-card .stadium {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }

        .countdown-timer {
            display: flex;
            justify-content: center;
            gap: 10px;
        }

        .timer-unit {
            background: var(--bg);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            min-width: 56px;
            text-align: center;
        }

        .timer-unit .num {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            font-family: var(--font-mono);
        }

        .timer-unit .label {
            font-size: 0.72rem;
            color: var(--text-muted);
            letter-spacing: 0.5px;
        }

        /* ============ 活动亮点 ============ */
        .highlights-section {
            background: var(--bg-white);
        }

        .highlight-bento {
            display: grid;
            grid-template-columns: 1.2fr 1fr 1fr;
            grid-template-rows: auto auto;
            gap: 20px;
            margin-top: 24px;
        }

        .highlight-featured {
            grid-row: span 2;
            background: var(--ink);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            color: #E5E7EB;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            min-height: 380px;
            position: relative;
            overflow: hidden;
            transition: all var(--transition);
        }

        .highlight-featured::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 220px;
            height: 220px;
            background: radial-gradient(circle, rgba(255,90,54,0.3), transparent);
            border-radius: 50%;
            pointer-events: none;
        }

        .highlight-featured:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }

        .highlight-featured .tag {
            font-size: 0.8rem;
            color: var(--accent);
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 16px;
        }

        .highlight-featured h3 {
            color: #FFFFFF;
            font-size: 1.55rem;
            margin-bottom: 14px;
        }

        .highlight-featured p {
            color: #B0B8C4;
            font-size: 0.95rem;
            line-height: 1.8;
        }

        .highlight-small {
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            background: var(--bg-white);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .highlight-small:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            border-color: var(--primary);
        }

        .highlight-small .icon-circle {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(0, 194, 168, 0.1);
            color: var(--accent-dark);
            font-size: 1.1rem;
            margin-bottom: 14px;
        }

        .highlight-small h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 8px;
        }

        .highlight-small p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        @media (max-width: 991px) {
            .highlight-bento {
                grid-template-columns: 1fr 1fr;
                grid-template-rows: auto;
            }

            .highlight-featured {
                grid-column: span 2;
                grid-row: auto;
                min-height: 280px;
            }
        }

        @media (max-width: 576px) {
            .highlight-bento {
                grid-template-columns: 1fr;
            }

            .highlight-featured {
                grid-column: span 1;
            }

            .highlight-featured h3 {
                font-size: 1.3rem;
            }
        }

        /* ============ 权益/礼包 ============ */
        .benefits-section {
            background: var(--bg);
        }

        .benefit-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 16px;
            margin-top: 20px;
        }

        .benefit-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 22px 20px;
            background: var(--bg-white);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all var(--transition);
        }

        .benefit-item:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--accent);
            transform: translateY(-2px);
        }

        .benefit-item .benefit-icon {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(255, 90, 54, 0.08);
            color: var(--primary);
            font-size: 1.3rem;
        }

        .benefit-item h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 4px;
        }

        .benefit-item p {
            font-size: 0.86rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin: 0;
        }

        /* ============ 步骤 ============ */
        .steps-section {
            background: var(--bg-white);
        }

        .steps-timeline {
            position: relative;
            margin-top: 30px;
            padding-left: 0;
        }

        .steps-timeline::before {
            content: '';
            position: absolute;
            top: 24px;
            left: 24px;
            bottom: 24px;
            width: 3px;
            background: linear-gradient(to bottom, var(--primary), var(--accent));
            border-radius: 3px;
            opacity: 0.5;
            display: none;
        }

        .step-item {
            display: flex;
            gap: 22px;
            padding: 24px 0;
            position: relative;
        }

        .step-num {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--ink);
            color: #FFFFFF;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 800;
            box-shadow: var(--shadow);
            position: relative;
            z-index: 2;
        }

        .step-num.completed {
            background: var(--accent);
        }

        .step-body h4 {
            font-size: 1.08rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 6px;
        }

        .step-body p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin: 0;
            max-width: 560px;
        }

        @media (min-width: 768px) {
            .steps-timeline {
                padding-left: 60px;
            }

            .steps-timeline::before {
                display: block;
                left: 26px;
            }

            .step-item {
                padding: 20px 0;
            }
        }

        @media (max-width: 767px) {
            .step-item {
                gap: 14px;
                padding: 16px 0;
            }

            .step-num {
                width: 40px;
                height: 40px;
                font-size: 1rem;
            }
        }

        /* ============ 赛程数据面板 ============ */
        .schedule-panel {
            background: var(--bg);
        }

        .schedule-table-wrap {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            overflow: hidden;
            margin-top: 24px;
        }

        .schedule-row {
            display: grid;
            grid-template-columns: 90px 1fr 1fr 100px 120px;
            align-items: center;
            gap: 16px;
            padding: 18px 24px;
            border-bottom: 1px solid var(--border);
            transition: background var(--transition-fast);
        }

        .schedule-row:last-child {
            border-bottom: none;
        }

        .schedule-row:hover {
            background: rgba(255, 90, 54, 0.04);
        }

        .schedule-row.header-row {
            background: var(--bg-dark);
            color: #B0B8C4;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            padding: 14px 24px;
            border-bottom: none;
        }

        .schedule-row.header-row:hover {
            background: var(--bg-dark);
        }

        .schedule-time {
            font-weight: 700;
            color: var(--ink);
            font-family: var(--font-mono);
        }

        .schedule-matchup {
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 600;
            color: var(--text);
        }

        .schedule-matchup .vs {
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.85rem;
        }

        .schedule-league {
            font-size: 0.85rem;
            color: var(--text-secondary);
        }

        .schedule-status {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            font-size: 0.82rem;
            font-weight: 600;
        }

        .status-live {
            background: rgba(255, 90, 54, 0.12);
            color: var(--primary);
        }

        .status-upcoming {
            background: rgba(0, 194, 168, 0.1);
            color: var(--accent-dark);
        }

        .status-finished {
            background: rgba(107, 114, 128, 0.12);
            color: var(--text-muted);
        }

        .schedule-score {
            font-weight: 800;
            color: var(--ink);
            font-family: var(--font-mono);
            letter-spacing: 1px;
        }

        @media (max-width: 768px) {
            .schedule-row {
                grid-template-columns: 70px 1fr 80px;
                gap: 10px;
                padding: 14px 16px;
                font-size: 0.85rem;
            }

            .schedule-row.header-row {
                display: none;
            }

            .schedule-league {
                display: none;
            }

            .schedule-score {
                font-size: 0.9rem;
            }
        }

        /* ============ 痛点 ============ */
        .pain-points-section {
            background: var(--bg-white);
        }

        .pain-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
            margin-top: 20px;
        }

        .pain-card {
            background: var(--bg);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            border: 1px solid var(--border);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

        .pain-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .pain-card .pain-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(255, 90, 54, 0.1);
            color: var(--primary);
            font-size: 1.3rem;
            margin-bottom: 16px;
        }

        .pain-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 8px;
        }

        .pain-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* ============ 解决方案 ============ */
        .solutions-section {
            background: var(--bg);
        }

        .solution-row {
            display: grid;
            grid-template-columns: 1fr 1.3fr;
            gap: 48px;
            align-items: center;
            margin-bottom: 48px;
        }

        .solution-row:last-child {
            margin-bottom: 0;
        }

        .solution-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            aspect-ratio: 16/10;
            background: var(--bg-dark);
        }

        .solution-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }

        .solution-content h3 {
            font-size: 1.45rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 14px;
        }

        .solution-content p {
            color: var(--text-secondary);
            font-size: 0.98rem;
            line-height: 1.8;
            margin-bottom: 14px;
        }

        .solution-content ul {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .solution-content ul li {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            background: rgba(0, 194, 168, 0.08);
            color: var(--accent-dark);
            border-radius: var(--radius-pill);
            font-size: 0.85rem;
            font-weight: 500;
        }

        .solution-content ul li i {
            font-size: 0.7rem;
        }

        @media (max-width: 768px) {
            .solution-row {
                grid-template-columns: 1fr;
                gap: 20px;
                margin-bottom: 32px;
            }

            .solution-image {
                order: -1;
            }
        }

        /* ============ 数据指标 ============ */
        .stats-section {
            background: var(--bg-dark);
            color: #E5E7EB;
        }

        .stats-section h2 {
            color: #FFFFFF;
        }

        .stats-section .section-desc {
            color: #B0B8C4;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 20px;
            margin-top: 30px;
        }

        .stat-item {
            text-align: center;
            padding: 28px 20px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-lg);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all var(--transition);
        }

        .stat-item:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 90, 54, 0.5);
            transform: translateY(-3px);
        }

        .stat-num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            font-family: var(--font-mono);
            margin-bottom: 8px;
        }

        .stat-unit {
            font-size: 1rem;
            color: #B0B8C4;
            font-weight: 500;
        }

        .stat-label {
            font-size: 0.9rem;
            color: #9CA3AF;
            font-weight: 500;
        }

        /* ============ 口碑/客户证言 ============ */
        .testimonials-section {
            background: var(--bg-white);
        }

        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
            margin-top: 24px;
        }

        .testimonial-card {
            background: var(--bg);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all var(--transition);
        }

        .testimonial-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--accent);
            transform: translateY(-3px);
        }

        .testimonial-stars {
            color: #F5A623;
            font-size: 0.85rem;
            margin-bottom: 14px;
            letter-spacing: 2px;
        }

        .testimonial-text {
            font-size: 0.93rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 18px;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .testimonial-author .avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--ink);
            color: #FFFFFF;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1rem;
            flex-shrink: 0;
        }

        .testimonial-author .author-info h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--ink);
            margin: 0;
        }

        .testimonial-author .author-info span {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* ============ 资讯 ============ */
        .news-section {
            background: var(--bg);
        }

        .news-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
            margin-top: 24px;
        }

        .news-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            border-color: var(--primary);
        }

        .news-card .news-img {
            height: 180px;
            overflow: hidden;
            background: var(--bg-dark);
        }

        .news-card .news-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition);
        }

        .news-card:hover .news-img img {
            transform: scale(1.05);
        }

        .news-card .news-body {
            padding: 22px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-date {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 8px;
            letter-spacing: 0.5px;
        }

        .news-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 10px;
            line-height: 1.45;
        }

        .news-card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
        }

        .news-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--primary);
            margin-top: 12px;
            transition: all var(--transition-fast);
        }

        .news-link:hover {
            color: var(--primary-dark);
            gap: 10px;
        }

        .news-more {
            text-align: center;
            margin-top: 28px;
        }

        /* ============ 运营数据指标 ============ */
        .platform-metrics {
            background: var(--bg-white);
        }

        .metrics-panel {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 0;
            background: var(--bg);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            margin-top: 24px;
        }

        .metric-cell {
            padding: 30px 24px;
            text-align: center;
            border-right: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            transition: background var(--transition-fast);
        }

        .metric-cell:hover {
            background: rgba(255, 90, 54, 0.04);
        }

        .metric-cell:nth-child(4n) {
            border-right: none;
        }

        .metric-cell .metric-value {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            font-family: var(--font-mono);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .metric-cell .metric-label {
            font-size: 0.88rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .metric-cell {
                border-right: 1px solid var(--border);
                padding: 20px 16px;
            }

            .metric-cell:nth-child(2n) {
                border-right: none;
            }

            .metric-cell .metric-value {
                font-size: 1.5rem;
            }
        }

        /* ============ 适用场景 ============ */
        .scenes-section {
            background: var(--bg);
        }

        .scene-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 24px;
        }

        .scene-tag {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 22px;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text);
            transition: all var(--transition-fast);
            box-shadow: var(--shadow);
            cursor: default;
        }

        .scene-tag:hover {
            border-color: var(--accent);
            color: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .scene-tag i {
            color: var(--accent);
            font-size: 1rem;
        }

        /* ============ 品牌介绍 ============ */
        .brand-section {
            background: var(--bg-white);
        }

        .brand-block {
            display: grid;
            grid-template-columns: 1fr 1.1fr;
            gap: 48px;
            align-items: center;
            background: var(--bg);
            border-radius: var(--radius-lg);
            padding: 44px 40px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
        }

        .brand-image {
            border-radius: var(--radius);
            overflow: hidden;
            aspect-ratio: 4/3;
            background: var(--bg-dark);
        }

        .brand-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius);
        }

        .brand-text h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 18px;
        }

        .brand-text p {
            color: var(--text-secondary);
            font-size: 0.98rem;
            line-height: 1.85;
            margin-bottom: 12px;
        }

        @media (max-width: 768px) {
            .brand-block {
                grid-template-columns: 1fr;
                padding: 28px 20px;
                gap: 24px;
            }
        }

        /* ============ CTA ============ */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, #D93A15 100%);
            padding: var(--section-padding);
        }

        .cta-card {
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-card h2 {
            color: #FFFFFF;
            font-size: clamp(1.7rem, 3.5vw, 2.4rem);
            margin-bottom: 16px;
        }

        .cta-card p {
            color: rgba(255, 255, 255, 0.9);
            font-size: 1.05rem;
            line-height: 1.8;
            margin-bottom: 28px;
        }

        .btn-cta-light {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 15px 32px;
            background: #FFFFFF;
            color: var(--primary);
            border-radius: var(--radius-pill);
            font-weight: 700;
            font-size: 1.05rem;
            border: none;
            transition: all var(--transition-fast);
            box-shadow: 0 10px 28px rgba(0, 0, 0, 0.2);
        }

        .btn-cta-light:hover {
            background: var(--ink);
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 16px 38px rgba(0, 0, 0, 0.3);
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background: var(--bg-dark);
            color: #B0B8C4;
            padding: 64px 0 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: #FFFFFF;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }

        .footer-brand .footer-logo .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: var(--primary);
            border-radius: 8px;
            font-size: 0.95rem;
            color: #FFFFFF;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: #9CA3AF;
            line-height: 1.75;
            margin-bottom: 0;
        }

        .footer-col h5 {
            color: #FFFFFF;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: #9CA3AF;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-col ul li a:hover {
            color: var(--primary);
            transform: translateX(4px);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            color: #6B7280;
        }

        .footer-bottom a {
            color: #9CA3AF;
            transition: color var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: var(--primary);
        }

        @media (max-width: 991px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 576px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ============ 通用响应式 ============ */
        @media (max-width: 768px) {
            section {
                padding: var(--section-padding-mobile);
            }

            h2 {
                font-size: 1.5rem;
            }

            .section-desc {
                font-size: 0.95rem;
                margin-bottom: 24px;
            }
        }

/* roulang page: category3 */
:root {
            --ink: #151A22;
            --primary: #FF5A36;
            --primary-dark: #E8451E;
            --accent: #00C2A8;
            --accent-dark: #009A86;
            --bg: #F5F7FA;
            --bg-white: #FFFFFF;
            --bg-dark: #151A22;
            --text: #1F2937;
            --text-secondary: #4B5563;
            --text-muted: #6B7280;
            --border: #E5E7EB;
            --border-strong: #D1D5DB;
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 18px;
            --radius-pill: 999px;
            --shadow: 0 8px 24px rgba(0,0,0,0.06);
            --shadow-hover: 0 14px 36px rgba(0,0,0,0.10);
            --shadow-lg: 0 20px 50px rgba(0,0,0,0.12);
            --shadow-primary: 0 10px 28px rgba(255,90,54,0.28);
            --transition-fast: 0.18s ease;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            --font-mono: "Inter", "SF Mono", system-ui, monospace;
            --section-padding: 84px 0;
            --section-padding-mobile: 48px 0;
            --container-max: 1200px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            box-shadow: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        input {
            font-family: inherit;
        }
        .container-xl {
            max-width: var(--container-max);
        }
        section {
            padding: var(--section-padding);
            position: relative;
        }
        .section-alt {
            background-color: var(--bg-white);
        }
        .section-dark {
            background-color: var(--bg-dark);
            color: #E5E7EB;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            background: rgba(255, 90, 54, 0.08);
            color: var(--primary);
            border-radius: var(--radius-pill);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }
        .section-label i {
            font-size: 0.8rem;
        }
        .section-desc {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 720px;
            margin-bottom: 36px;
        }
        /* ============ 导航 ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(21, 26, 34, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
        }
        .navbar {
            padding: 12px 0;
            background: transparent;
        }
        .navbar .navbar-brand {
            font-size: 1.55rem;
            font-weight: 800;
            color: #FFFFFF;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 0;
        }
        .navbar .navbar-brand:hover {
            color: #FFFFFF;
        }
        .navbar .navbar-brand .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--primary);
            border-radius: 10px;
            font-size: 1.1rem;
            color: #FFFFFF;
            flex-shrink: 0;
        }
        .navbar .nav-link {
            color: #B0B8C4;
            font-size: 0.95rem;
            font-weight: 500;
            padding: 8px 16px !important;
            transition: color var(--transition-fast);
            position: relative;
        }
        .navbar .nav-link:hover,
        .navbar .nav-link.active {
            color: #FFFFFF;
        }
        .navbar .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .btn-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            background: var(--primary);
            color: #FFFFFF !important;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-primary);
            white-space: nowrap;
        }
        .btn-nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 14px 34px rgba(255, 90, 54, 0.38);
        }
        /* ============ 面包屑 ============ */
        .breadcrumb-wrap {
            padding: 28px 0 0;
            background: var(--bg-dark);
        }
        .breadcrumb {
            margin: 0;
            padding: 0;
            background: transparent;
            font-size: 0.85rem;
            color: #9CA3AF;
        }
        .breadcrumb a {
            color: #D1D5DB;
        }
        .breadcrumb a:hover {
            color: #FFFFFF;
        }
        .breadcrumb .breadcrumb-item.active {
            color: #9CA3AF;
        }
        .breadcrumb-item + .breadcrumb-item::before {
            content: "›";
            color: #6B7280;
        }
        /* ============ 页面头部 ============ */
        .page-hero {
            background: var(--bg-dark);
            padding: 40px 0 64px;
            color: #FFFFFF;
            position: relative;
            overflow: hidden;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -80px;
            right: -40px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(255,90,54,0.18) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-hero h1 {
            font-size: 2.75rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .page-hero h1 span {
            color: var(--primary);
        }
        .page-hero .hero-desc {
            font-size: 1.15rem;
            color: #B0B8C4;
            max-width: 780px;
            line-height: 1.8;
        }
        /* ============ 案例卡片 ============ */
        .case-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .case-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(255, 90, 54, 0.4);
            transform: translateY(-4px);
        }
        .case-card .card-cover {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
        }
        .case-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .case-card:hover .card-cover img {
            transform: scale(1.04);
        }
        .case-card .card-cover .industry-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 5px 14px;
            background: rgba(21, 26, 34, 0.82);
            color: #FFFFFF;
            border-radius: var(--radius-pill);
            font-size: 0.8rem;
            font-weight: 600;
            backdrop-filter: blur(6px);
            letter-spacing: 0.5px;
        }
        .case-card .card-body {
            padding: 22px 22px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .case-card .card-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--ink);
            line-height: 1.4;
        }
        .case-card .card-text {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }
        .case-card .case-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            align-items: center;
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }
        .case-card .case-meta .metric {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 500;
        }
        .case-card .case-meta .metric i {
            color: var(--accent);
            font-size: 0.9rem;
        }
        /* ============ 行业标签 ============ */
        .industry-tag-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .industry-tag-grid .tag-item {
            padding: 10px 24px;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .industry-tag-grid .tag-item:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(255, 90, 54, 0.04);
        }
        .industry-tag-grid .tag-item i {
            font-size: 0.85rem;
            color: var(--accent);
        }
        /* ============ 精选案例摘要 ============ */
        .featured-case {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            display: flex;
            flex-wrap: wrap;
            transition: all var(--transition);
        }
        .featured-case:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(255, 90, 54, 0.35);
        }
        .featured-case .featured-cover {
            flex: 0 0 42%;
            min-height: 320px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .featured-case .featured-cover .cover-badge {
            position: absolute;
            top: 18px;
            left: 18px;
            padding: 6px 18px;
            background: var(--primary);
            color: #FFFFFF;
            border-radius: var(--radius-pill);
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.5px;
        }
        .featured-case .featured-body {
            flex: 1;
            padding: 32px 36px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .featured-case .featured-body h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--ink);
        }
        .featured-case .featured-body p {
            color: var(--text-secondary);
            font-size: 0.98rem;
            line-height: 1.8;
            margin-bottom: 18px;
        }
        .featured-case .featured-body .highlight-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
        }
        .featured-case .featured-body .highlight-stats .stat-item {
            display: flex;
            flex-direction: column;
        }
        .featured-case .featured-body .highlight-stats .stat-value {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .featured-case .featured-body .highlight-stats .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        /* ============ 数据指标 ============ */
        .metrics-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .metric-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 28px 22px;
            text-align: center;
            border: 1px solid var(--border);
            transition: all var(--transition);
            box-shadow: var(--shadow);
        }
        .metric-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(255, 90, 54, 0.35);
        }
        .metric-card .metric-value {
            font-size: 2.25rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: -0.5px;
        }
        .metric-card .metric-unit {
            font-size: 1rem;
            color: var(--text-secondary);
            font-weight: 600;
        }
        .metric-card .metric-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 8px;
        }
        /* ============ 客户反馈 ============ */
        .testimonial-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 28px 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            height: 100%;
            transition: all var(--transition);
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(255, 90, 54, 0.3);
        }
        .testimonial-card .stars {
            color: #F59E0B;
            font-size: 0.9rem;
            margin-bottom: 14px;
            letter-spacing: 2px;
        }
        .testimonial-card .quote-text {
            color: var(--text-secondary);
            font-size: 0.98rem;
            line-height: 1.8;
            margin-bottom: 18px;
        }
        .testimonial-card .client-info {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .testimonial-card .client-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(255, 90, 54, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-weight: 700;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .testimonial-card .client-detail .client-name {
            font-weight: 600;
            color: var(--ink);
            font-size: 0.95rem;
        }
        .testimonial-card .client-detail .client-role {
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        /* ============ CTA ============ */
        .cta-section {
            background: var(--bg-dark);
            color: #FFFFFF;
            border-radius: var(--radius-lg);
            padding: 52px 48px;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -100px;
            left: -100px;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(255,90,54,0.25) 0%, transparent 70%);
            border-radius: 50%;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -120px;
            right: -80px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(0,194,168,0.2) 0%, transparent 70%);
            border-radius: 50%;
        }
        .cta-section .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .cta-section p {
            color: #B0B8C4;
            font-size: 1.05rem;
            max-width: 620px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 13px 32px;
            background: var(--primary);
            color: #FFFFFF !important;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 1rem;
            border: none;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-primary);
            white-space: nowrap;
        }
        .btn-primary-custom:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 16px 40px rgba(255, 90, 54, 0.42);
        }
        .btn-secondary-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 13px 28px;
            background: transparent;
            color: #FFFFFF !important;
            border: 1px solid rgba(255,255,255,0.35);
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .btn-secondary-custom:hover {
            background: rgba(255,255,255,0.08);
            border-color: rgba(255,255,255,0.6);
        }
        /* ============ 页脚 ============ */
        .site-footer {
            background: var(--bg-dark);
            color: #E5E7EB;
            padding: 60px 0 28px;
            border-top: 1px solid rgba(255,255,255,0.08);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 0.8fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }
        .footer-brand .footer-logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: #FFFFFF;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }
        .footer-brand .footer-logo .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            background: var(--primary);
            border-radius: 8px;
            font-size: 0.95rem;
            color: #FFFFFF;
            flex-shrink: 0;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: #9CA3AF;
            line-height: 1.75;
            margin-bottom: 0;
        }
        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: #9CA3AF;
            font-size: 0.9rem;
            transition: color var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul li a:hover {
            color: #FFFFFF;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 22px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: #6B7280;
        }
        .footer-bottom a {
            color: #9CA3AF;
            font-size: 0.85rem;
        }
        .footer-bottom a:hover {
            color: #FFFFFF;
        }
        /* ============ 响应式 ============ */
        @media (max-width: 991px) {
            .page-hero h1 {
                font-size: 2.2rem;
            }
            .metrics-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .featured-case .featured-cover {
                flex: 0 0 100%;
                min-height: 240px;
            }
            .featured-case .featured-body {
                padding: 28px 24px;
            }
            .navbar .nav-link {
                padding: 10px 0 !important;
                color: #E5E7EB;
            }
            .navbar .nav-link.active::after {
                display: none;
            }
            .btn-nav-cta {
                margin: 12px 0;
                justify-content: center;
                width: 100%;
            }
            .navbar-collapse {
                padding: 16px 0 8px;
            }
            .cta-section {
                padding: 40px 28px;
            }
        }
        @media (max-width: 767px) {
            section {
                padding: var(--section-padding-mobile);
            }
            .breadcrumb-wrap {
                padding: 20px 0 0;
            }
            .page-hero {
                padding: 32px 0 48px;
            }
            .page-hero h1 {
                font-size: 1.8rem;
            }
            .page-hero .hero-desc {
                font-size: 1rem;
            }
            .metrics-row {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .metric-card {
                padding: 20px 14px;
            }
            .metric-card .metric-value {
                font-size: 1.7rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }
        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 1.5rem;
            }
            .metrics-row {
                grid-template-columns: 1fr;
            }
            .case-card .card-body {
                padding: 18px 16px 20px;
            }
            .case-card .card-title {
                font-size: 1.1rem;
            }
            .industry-tag-grid {
                gap: 8px;
            }
            .industry-tag-grid .tag-item {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
            .featured-case .featured-body h3 {
                font-size: 1.25rem;
            }
            .featured-case .featured-body .highlight-stats {
                gap: 14px;
            }
            .featured-case .featured-body .highlight-stats .stat-value {
                font-size: 1.4rem;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section {
                padding: 32px 20px;
            }
        }

/* roulang page: category1 */
:root {
            --ink: #151A22;
            --primary: #FF5A36;
            --primary-dark: #E8451E;
            --accent: #00C2A8;
            --accent-dark: #009A86;
            --bg: #F5F7FA;
            --bg-white: #FFFFFF;
            --bg-dark: #151A22;
            --text: #1F2937;
            --text-secondary: #4B5563;
            --text-muted: #6B7280;
            --border: #E5E7EB;
            --border-strong: #D1D5DB;
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 18px;
            --radius-pill: 999px;
            --shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 14px 36px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.12);
            --shadow-primary: 0 10px 28px rgba(255, 90, 54, 0.28);
            --transition-fast: 0.18s ease;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            --font-mono: "Inter", "SF Mono", system-ui, monospace;
            --section-padding: 84px 0;
            --section-padding-mobile: 48px 0;
            --container-max: 1200px;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--primary-dark);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            box-shadow: none;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            font-family: inherit;
            cursor: pointer;
        }

        input {
            font-family: inherit;
        }

        .container-xl {
            max-width: var(--container-max);
        }

        section {
            padding: var(--section-padding);
            position: relative;
        }

        .section-alt {
            background-color: var(--bg-white);
        }

        .section-dark {
            background-color: var(--bg-dark);
            color: #E5E7EB;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            background: rgba(255, 90, 54, 0.08);
            color: var(--primary);
            border-radius: var(--radius-pill);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }

        .section-label i {
            font-size: 0.8rem;
        }

        .section-desc {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 720px;
            margin-bottom: 36px;
        }

        /* ============ 导航 ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(21, 26, 34, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
        }

        .navbar {
            padding: 12px 0;
            background: transparent;
        }

        .navbar .navbar-brand {
            font-size: 1.55rem;
            font-weight: 800;
            color: #FFFFFF;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 0;
        }

        .navbar .navbar-brand:hover {
            color: #FFFFFF;
        }

        .navbar .navbar-brand .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--primary);
            border-radius: 10px;
            font-size: 1.1rem;
            color: #FFFFFF;
            flex-shrink: 0;
        }

        .navbar .nav-link {
            color: #B0B8C4;
            font-size: 0.95rem;
            font-weight: 500;
            padding: 8px 16px !important;
            transition: color var(--transition-fast);
            position: relative;
        }

        .navbar .nav-link:hover,
        .navbar .nav-link.active {
            color: #FFFFFF;
        }

        .navbar .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .btn-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            background: var(--primary);
            color: #FFFFFF !important;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-primary);
            white-space: nowrap;
        }

        .btn-nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 14px 34px rgba(255, 90, 54, 0.38);
            color: #FFFFFF !important;
        }

        .btn-nav-cta:active {
            transform: translateY(0);
            box-shadow: var(--shadow-primary);
        }

        .navbar-toggler {
            border-color: rgba(255, 255, 255, 0.3);
            padding: 6px 10px;
        }

        .navbar-toggler:focus {
            box-shadow: none;
            border-color: rgba(255, 255, 255, 0.5);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.7%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        @media (max-width: 991.98px) {
            .navbar .navbar-collapse {
                background: rgba(21, 26, 34, 0.98);
                border-radius: 0 0 16px 16px;
                padding: 16px;
                margin-top: 12px;
                border: 1px solid rgba(255, 255, 255, 0.08);
            }

            .navbar .nav-link {
                padding: 12px 16px !important;
                font-size: 1rem;
            }

            .navbar .nav-link.active::after {
                display: none;
            }

            .btn-nav-cta {
                margin-top: 12px;
                width: 100%;
                justify-content: center;
                padding: 14px 22px;
                font-size: 1.05rem;
            }
        }

        /* ============ 面包屑 ============ */
        .breadcrumb-section {
            padding: 32px 0 0;
            background: var(--bg-white);
        }

        .breadcrumb {
            margin: 0;
            padding: 0;
            background: transparent;
            font-size: 0.9rem;
        }

        .breadcrumb-item a {
            color: var(--text-muted);
        }

        .breadcrumb-item a:hover {
            color: var(--primary);
        }

        .breadcrumb-item.active {
            color: var(--text-secondary);
            font-weight: 500;
        }

        .breadcrumb-item+.breadcrumb-item::before {
            color: var(--border-strong);
            content: "\f105";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 0.7rem;
            padding: 0 8px;
        }

        /* ============ 页面头部 ============ */
        .page-header {
            padding: 40px 0 56px;
            background: var(--bg-white);
        }

        .page-header h1 {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--ink);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            line-height: 1.25;
        }

        .page-header .lead {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 820px;
            margin-bottom: 0;
        }

        /* ============ 方案卡主体 ============ */
        .solutions-grid-section {
            background: var(--bg);
        }

        .solution-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .solution-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            transform: translateY(-3px);
        }

        .solution-card .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 8;
            flex-shrink: 0;
        }

        .solution-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition);
        }

        .solution-card:hover .card-img-wrap img {
            transform: scale(1.04);
        }

        .solution-card .card-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .solution-card .card-tag {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(0, 194, 168, 0.1);
            color: var(--accent-dark);
            border-radius: var(--radius-pill);
            font-size: 0.78rem;
            font-weight: 600;
            margin-bottom: 12px;
            align-self: flex-start;
        }

        .solution-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 8px;
            line-height: 1.35;
        }

        .solution-card .card-scene {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .solution-card .card-scene i {
            color: var(--primary);
            font-size: 0.8rem;
        }

        .solution-card .card-desc {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }

        .solution-card .config-badge {
            font-size: 0.82rem;
            color: var(--text-muted);
            background: var(--bg);
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            gap: 7px;
        }

        .solution-card .config-badge i {
            color: var(--primary);
            font-size: 0.75rem;
            flex-shrink: 0;
        }

        /* ============ 方案对比表 ============ */
        .comparison-section {
            background: var(--bg-white);
        }

        .comparison-table-wrapper {
            overflow-x: auto;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            background: var(--bg-white);
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 720px;
        }

        .comparison-table thead th {
            background: var(--ink);
            color: #FFFFFF;
            font-weight: 600;
            font-size: 0.9rem;
            padding: 18px 20px;
            text-align: left;
            border-bottom: 2px solid var(--primary);
            white-space: nowrap;
        }

        .comparison-table tbody td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border);
            color: var(--text-secondary);
            font-size: 0.92rem;
            vertical-align: middle;
        }

        .comparison-table tbody tr:last-child td {
            border-bottom: none;
        }

        .comparison-table tbody tr:hover td {
            background: rgba(255, 90, 54, 0.03);
        }

        .comparison-table .table-plan-name {
            font-weight: 700;
            color: var(--ink);
            white-space: nowrap;
        }

        .comparison-table .table-highlight {
            color: var(--primary);
            font-weight: 700;
        }

        /* ============ 接入步骤 ============ */
        .steps-section {
            background: var(--bg);
        }

        .step-item {
            display: flex;
            gap: 16px;
            padding: 20px 0;
            position: relative;
        }

        .step-item::before {
            content: '';
            position: absolute;
            left: 23px;
            top: 58px;
            bottom: -20px;
            width: 2px;
            background: var(--border);
            border-radius: 1px;
        }

        .step-item:last-child::before {
            display: none;
        }

        .step-num {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            background: var(--bg-white);
            border: 2px solid var(--primary);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            z-index: 1;
            transition: all var(--transition-fast);
        }

        .step-item:hover .step-num {
            background: var(--primary);
            color: #FFFFFF;
            box-shadow: var(--shadow-primary);
        }

        .step-content {
            flex: 1;
            padding-top: 4px;
        }

        .step-content h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 6px;
        }

        .step-content p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ============ 适用行业 ============ */
        .industries-section {
            background: var(--bg-white);
        }

        .industry-tag-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .industry-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 22px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
        }

        .industry-tag:hover {
            border-color: var(--primary);
            background: rgba(255, 90, 54, 0.05);
            color: var(--primary);
            transform: translateY(-1px);
        }

        .industry-tag i {
            color: var(--primary);
            font-size: 0.85rem;
        }

        /* ============ 数据指标 ============ */
        .metrics-section {
            background: var(--bg-dark);
            color: #E5E7EB;
        }

        .metrics-section .metric-card {
            text-align: center;
            padding: 24px 16px;
            border-radius: var(--radius);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all var(--transition);
            height: 100%;
        }

        .metrics-section .metric-card:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 90, 54, 0.4);
            transform: translateY(-3px);
        }

        .metric-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 8px;
            letter-spacing: -0.5px;
        }

        .metric-unit {
            font-size: 1rem;
            font-weight: 600;
            color: var(--accent);
            margin-left: 2px;
        }

        .metric-label {
            font-size: 0.9rem;
            color: #B0B8C4;
        }

        /* ============ FAQ ============ */
        .faq-section {
            background: var(--bg);
        }

        .accordion-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius) !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition-fast);
        }

        .accordion-item:hover {
            box-shadow: var(--shadow-hover);
        }

        .accordion-button {
            background: var(--bg-white);
            color: var(--ink);
            font-weight: 600;
            font-size: 1rem;
            padding: 18px 24px;
            border: none;
            box-shadow: none !important;
            transition: color var(--transition-fast);
        }

        .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: rgba(255, 90, 54, 0.04);
        }

        .accordion-button::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%231F2937'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
        }

        .accordion-button:not(.collapsed)::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23FF5A36'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
        }

        .accordion-body {
            padding: 18px 24px 20px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.75;
            background: var(--bg-white);
        }

        /* ============ CTA ============ */
        .cta-section {
            background: linear-gradient(135deg, var(--ink) 0%, #1E2530 60%, #2A1A1A 100%);
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(255, 90, 54, 0.2) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -15%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 194, 168, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-content h2 {
            color: #FFFFFF;
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .cta-content p {
            color: #B0B8C4;
            font-size: 1.05rem;
            margin-bottom: 32px;
        }

        .btn-cta-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            background: var(--primary);
            color: #FFFFFF;
            border-radius: var(--radius-pill);
            font-weight: 700;
            font-size: 1.05rem;
            border: none;
            transition: all var(--transition);
            box-shadow: var(--shadow-primary);
        }

        .btn-cta-primary:hover {
            background: var(--primary-dark);
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 18px 40px rgba(255, 90, 54, 0.4);
        }

        .btn-cta-primary:active {
            transform: translateY(0);
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background: var(--bg-dark);
            color: #B0B8C4;
            padding: 56px 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: #FFFFFF;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 16px;
        }

        .footer-logo .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: 9px;
            font-size: 1rem;
            color: #FFFFFF;
            flex-shrink: 0;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: #9BA3AF;
            margin-bottom: 0;
            max-width: 340px;
        }

        .footer-col h5 {
            color: #FFFFFF;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: #9BA3AF;
            font-size: 0.9rem;
            transition: color var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-col ul li a:hover {
            color: var(--primary);
        }

        .footer-col ul li a i {
            font-size: 0.75rem;
            color: var(--primary);
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding: 20px 0;
            font-size: 0.85rem;
            color: #6B7280;
        }

        .footer-bottom a {
            color: #6B7280;
            transition: color var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: var(--primary);
        }

        @media (max-width: 991.98px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 575.98px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
        }

        /* ============ 响应式 ============ */
        @media (max-width: 991.98px) {
            section {
                padding: var(--section-padding-mobile);
            }

            .page-header h1 {
                font-size: 2rem;
            }

            .metric-number {
                font-size: 1.8rem;
            }

            .cta-content h2 {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 767.98px) {
            .solution-card .card-body {
                padding: 18px;
            }

            .solution-card .card-img-wrap {
                aspect-ratio: 16 / 9;
            }

            .comparison-table-wrapper {
                border-radius: var(--radius);
            }

            .step-num {
                width: 40px;
                height: 40px;
                font-size: 0.95rem;
            }

            .step-item::before {
                left: 19px;
                top: 48px;
            }

            .industry-tag {
                padding: 10px 16px;
                font-size: 0.85rem;
            }
        }

        @media (max-width: 519.98px) {
            .page-header h1 {
                font-size: 1.7rem;
            }

            .page-header .lead {
                font-size: 1rem;
            }

            .solution-card h3 {
                font-size: 1.05rem;
            }

            .metric-number {
                font-size: 1.5rem;
            }

            .cta-content h2 {
                font-size: 1.4rem;
            }

            .btn-cta-primary {
                padding: 12px 24px;
                font-size: 0.95rem;
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category4 */
:root {
            --ink: #151A22;
            --primary: #FF5A36;
            --primary-dark: #E8451E;
            --accent: #00C2A8;
            --accent-dark: #009A86;
            --bg: #F5F7FA;
            --bg-white: #FFFFFF;
            --bg-dark: #151A22;
            --text: #1F2937;
            --text-secondary: #4B5563;
            --text-muted: #6B7280;
            --border: #E5E7EB;
            --border-strong: #D1D5DB;
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 18px;
            --radius-pill: 999px;
            --shadow: 0 8px 24px rgba(0,0,0,0.06);
            --shadow-hover: 0 14px 36px rgba(0,0,0,0.10);
            --shadow-lg: 0 20px 50px rgba(0,0,0,0.12);
            --shadow-primary: 0 10px 28px rgba(255,90,54,0.28);
            --transition-fast: 0.18s ease;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            --font-mono: "Inter", "SF Mono", system-ui, monospace;
            --section-padding: 84px 0;
            --section-padding-mobile: 48px 0;
            --container-max: 1200px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--primary-dark);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            box-shadow: none;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            font-family: inherit;
            cursor: pointer;
        }

        input {
            font-family: inherit;
        }

        .container-xl {
            max-width: var(--container-max);
        }

        section {
            padding: var(--section-padding);
            position: relative;
        }

        .section-alt {
            background-color: var(--bg-white);
        }

        .section-dark {
            background-color: var(--bg-dark);
            color: #E5E7EB;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            background: rgba(255, 90, 54, 0.08);
            color: var(--primary);
            border-radius: var(--radius-pill);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }

        .section-label i {
            font-size: 0.8rem;
        }

        .section-desc {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 720px;
            margin-bottom: 36px;
        }

        .section-title-wrap {
            max-width: 760px;
            margin-bottom: 48px;
        }

        .section-title-wrap h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--ink);
            line-height: 1.35;
            margin-bottom: 14px;
        }

        .section-title-wrap .section-desc {
            margin-bottom: 0;
        }

        /* ============ 导航 ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(21, 26, 34, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
        }

        .navbar {
            padding: 12px 0;
            background: transparent;
        }

        .navbar .navbar-brand {
            font-size: 1.55rem;
            font-weight: 800;
            color: #FFFFFF;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 0;
        }

        .navbar .navbar-brand:hover {
            color: #FFFFFF;
        }

        .navbar .navbar-brand .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--primary);
            border-radius: 10px;
            font-size: 1.1rem;
            color: #FFFFFF;
            flex-shrink: 0;
        }

        .navbar .nav-link {
            color: #B0B8C4;
            font-size: 0.95rem;
            font-weight: 500;
            padding: 8px 16px !important;
            transition: color var(--transition-fast);
            position: relative;
        }

        .navbar .nav-link:hover,
        .navbar .nav-link.active {
            color: #FFFFFF;
        }

        .navbar .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .btn-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            background: var(--primary);
            color: #FFFFFF !important;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-primary);
            white-space: nowrap;
        }

        .btn-nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 14px 34px rgba(255, 90, 54, 0.38);
            color: #FFFFFF;
        }

        /* ============ 通用按钮 ============ */
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            background: var(--primary);
            color: #FFFFFF;
            border: none;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.98rem;
            transition: all var(--transition);
            box-shadow: var(--shadow-primary);
            white-space: nowrap;
        }

        .btn-primary-custom:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 16px 38px rgba(255, 90, 54, 0.40);
            color: #FFFFFF;
        }

        .btn-primary-custom:active {
            transform: translateY(0);
            box-shadow: 0 8px 20px rgba(255, 90, 54, 0.28);
        }

        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            background: transparent;
            color: var(--ink);
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.98rem;
            transition: all var(--transition);
            white-space: nowrap;
        }

        .btn-outline-custom:hover {
            background: rgba(255, 90, 54, 0.06);
            border-color: var(--primary);
            color: var(--primary-dark);
            transform: translateY(-1px);
        }

        .btn-outline-custom:active {
            transform: translateY(0);
        }

        /* ============ 分类头部 ============ */
        .page-hero {
            background: var(--bg-dark);
            color: #FFFFFF;
            padding: 72px 0 64px;
            position: relative;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
            background: radial-gradient(circle at 80% 20%, rgba(255,90,54,0.16) 0%, transparent 45%),
                        radial-gradient(circle at 10% 90%, rgba(0,194,168,0.12) 0%, transparent 40%);
            pointer-events: none;
        }

        .page-hero .container-xl {
            position: relative;
            z-index: 1;
        }

        .breadcrumb {
            --bs-breadcrumb-divider-color: rgba(255,255,255,0.5);
            --bs-breadcrumb-item-active-color: rgba(255,255,255,0.85);
            margin-bottom: 24px;
        }

        .breadcrumb-item a {
            color: rgba(255,255,255,0.65);
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }

        .breadcrumb-item a:hover {
            color: #FFFFFF;
        }

        .breadcrumb-item.active {
            color: rgba(255,255,255,0.85);
            font-size: 0.9rem;
        }

        .page-hero-title {
            font-size: 2.75rem;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
            color: #FFFFFF;
        }

        .page-hero-desc {
            color: rgba(255,255,255,0.78);
            font-size: 1.08rem;
            max-width: 700px;
            margin-bottom: 0;
            line-height: 1.9;
        }

        .hero-image-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 24px 60px rgba(0,0,0,0.35);
            border: 1px solid rgba(255,255,255,0.12);
        }

        .hero-image-wrap img {
            width: 100%;
            height: 260px;
            object-fit: cover;
        }

        /* ============ 入门路径 ============ */
        .step-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            height: 100%;
        }

        .step-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(255, 90, 54, 0.25);
            transform: translateY(-4px);
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            background: rgba(255, 90, 54, 0.1);
            color: var(--primary);
            border-radius: 12px;
            font-weight: 800;
            font-size: 1.2rem;
            margin-bottom: 16px;
        }

        .step-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 10px;
        }

        .step-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 0;
        }

        /* ============ 文章列表 ============ */
        .article-list-item {
            display: flex;
            gap: 24px;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 18px;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            margin-bottom: 18px;
        }

        .article-list-item:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(255, 90, 54, 0.25);
            transform: translateY(-2px);
        }

        .article-list-item:last-child {
            margin-bottom: 0;
        }

        .article-thumb {
            flex-shrink: 0;
            width: 180px;
            height: 130px;
            border-radius: var(--radius);
            overflow: hidden;
        }

        .article-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .article-content {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            margin-bottom: 8px;
        }

        .article-tag {
            display: inline-block;
            padding: 3px 12px;
            background: rgba(0, 194, 168, 0.1);
            color: var(--accent-dark);
            border-radius: var(--radius-pill);
            font-size: 0.78rem;
            font-weight: 600;
        }

        .article-duration {
            color: var(--text-muted);
            font-size: 0.82rem;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .article-list-item h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 6px;
            line-height: 1.5;
        }

        .article-list-item p {
            color: var(--text-secondary);
            font-size: 0.92rem;
            margin-bottom: 0;
        }

        /* ============ 进阶专题 ============ */
        .topic-card {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 22px;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            height: 100%;
        }

        .topic-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(0, 194, 168, 0.3);
            transform: translateY(-3px);
        }

        .topic-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            background: rgba(0, 194, 168, 0.1);
            color: var(--accent-dark);
            border-radius: 14px;
            font-size: 1.3rem;
            flex-shrink: 0;
        }

        .topic-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 4px;
        }

        .topic-card p {
            color: var(--text-muted);
            font-size: 0.85rem;
            margin-bottom: 0;
        }

        /* ============ 术语表 ============ */
        .term-list {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
        }

        .term-item {
            display: flex;
            gap: 20px;
            padding: 20px 24px;
            border-bottom: 1px solid var(--border);
            transition: background var(--transition-fast);
        }

        .term-item:last-child {
            border-bottom: none;
        }

        .term-item:hover {
            background: rgba(255, 90, 54, 0.03);
        }

        .term-name {
            flex-shrink: 0;
            width: 160px;
            font-weight: 700;
            color: var(--ink);
            font-size: 0.95rem;
        }

        .term-def {
            flex: 1;
            color: var(--text-secondary);
            font-size: 0.92rem;
            margin-bottom: 0;
        }

        /* ============ FAQ ============ */
        .accordion-custom .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius) !important;
            overflow: hidden;
            margin-bottom: 14px;
            background: var(--bg-white);
            box-shadow: var(--shadow);
        }

        .accordion-custom .accordion-item:last-child {
            margin-bottom: 0;
        }

        .accordion-custom .accordion-button {
            background: var(--bg-white);
            color: var(--ink);
            font-weight: 700;
            font-size: 1rem;
            padding: 18px 22px;
            border: none;
            box-shadow: none;
            line-height: 1.6;
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(255, 90, 54, 0.04);
            color: var(--primary-dark);
        }

        .accordion-custom .accordion-button:focus {
            outline: 2px solid var(--primary);
            outline-offset: -2px;
            box-shadow: none;
        }

        .accordion-custom .accordion-button::after {
            background-size: 1.1rem;
            transition: transform var(--transition);
        }

        .accordion-custom .accordion-body {
            padding: 18px 22px 22px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.85;
        }

        /* ============ CTA ============ */
        .cta-section {
            background: var(--bg-dark);
            color: #FFFFFF;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
            background: radial-gradient(circle at 75% 30%, rgba(255,90,54,0.18) 0%, transparent 40%),
                        radial-gradient(circle at 15% 80%, rgba(0,194,168,0.14) 0%, transparent 45%);
            pointer-events: none;
        }

        .cta-section .container-xl {
            position: relative;
            z-index: 1;
        }

        .cta-box {
            background: rgba(255,255,255,0.06);
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: var(--radius-lg);
            padding: 48px;
            backdrop-filter: blur(10px);
            text-align: center;
        }

        .cta-box h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 16px;
            color: #FFFFFF;
        }

        .cta-box p {
            color: rgba(255,255,255,0.75);
            max-width: 620px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background: var(--bg-dark);
            color: #B0B8C4;
            padding: 64px 0 0;
            border-top: 1px solid rgba(255,255,255,0.06);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
            margin-bottom: 24px;
        }

        .footer-logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: #FFFFFF;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 16px;
        }

        .footer-logo .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: 10px;
            font-size: 0.95rem;
            color: #FFFFFF;
        }

        .footer-brand p {
            color: #8A94A3;
            font-size: 0.9rem;
            max-width: 320px;
            line-height: 1.8;
        }

        .footer-col h5 {
            color: #FFFFFF;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: #8A94A3;
            font-size: 0.9rem;
            transition: color var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-col ul li a:hover {
            color: #FFFFFF;
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: space-between;
            align-items: center;
            padding-bottom: 24px;
            font-size: 0.82rem;
            color: #6B7280;
        }

        .footer-bottom a {
            color: #8A94A3;
            transition: color var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: #FFFFFF;
        }

        /* ============ 响应式 ============ */
        @media (max-width: 991.98px) {
            .page-hero-title {
                font-size: 2.2rem;
            }
            .page-hero {
                padding: 56px 0 48px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .navbar-collapse {
                padding-top: 16px;
            }
            .navbar .nav-link {
                padding: 10px 0 !important;
            }
            .navbar .btn-nav-cta {
                margin-top: 12px;
                width: 100%;
                justify-content: center;
            }
            .article-list-item {
                flex-direction: column;
            }
            .article-thumb {
                width: 100%;
                height: 180px;
            }
        }

        @media (max-width: 767.98px) {
            section {
                padding: var(--section-padding-mobile);
            }
            .page-hero-title {
                font-size: 1.8rem;
            }
            .page-hero-desc {
                font-size: 0.98rem;
            }
            .section-title-wrap h2 {
                font-size: 1.55rem;
            }
            .hero-image-wrap img {
                height: 200px;
            }
            .cta-box {
                padding: 32px 20px;
            }
            .cta-box h2 {
                font-size: 1.5rem;
            }
            .term-item {
                flex-direction: column;
                gap: 8px;
                padding: 16px 18px;
            }
            .term-name {
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .article-list-item {
                padding: 14px;
            }
            .article-thumb {
                height: 160px;
            }
        }

        @media (max-width: 575.98px) {
            .page-hero-title {
                font-size: 1.6rem;
            }
            .btn-primary-custom,
            .btn-outline-custom {
                width: 100%;
                justify-content: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .navbar-brand {
                font-size: 1.3rem;
            }
        }

/* roulang page: category2 */
:root {
            --ink: #151A22;
            --primary: #FF5A36;
            --primary-dark: #E8451E;
            --accent: #00C2A8;
            --accent-dark: #009A86;
            --bg: #F5F7FA;
            --bg-white: #FFFFFF;
            --bg-dark: #151A22;
            --text: #1F2937;
            --text-secondary: #4B5563;
            --text-muted: #6B7280;
            --border: #E5E7EB;
            --border-strong: #D1D5DB;
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 18px;
            --radius-pill: 999px;
            --shadow: 0 8px 24px rgba(0,0,0,0.06);
            --shadow-hover: 0 14px 36px rgba(0,0,0,0.10);
            --shadow-lg: 0 20px 50px rgba(0,0,0,0.12);
            --shadow-primary: 0 10px 28px rgba(255,90,54,0.28);
            --transition-fast: 0.18s ease;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            --font-mono: "Inter", "SF Mono", system-ui, monospace;
            --section-padding: 84px 0;
            --section-padding-mobile: 48px 0;
            --container-max: 1200px;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            box-shadow: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        input {
            font-family: inherit;
        }
        .container-xl {
            max-width: var(--container-max);
        }
        section {
            padding: var(--section-padding);
            position: relative;
        }
        .section-alt {
            background-color: var(--bg-white);
        }
        .section-dark {
            background-color: var(--bg-dark);
            color: #E5E7EB;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            background: rgba(255, 90, 54, 0.08);
            color: var(--primary);
            border-radius: var(--radius-pill);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }
        .section-label i {
            font-size: 0.8rem;
        }
        .section-desc {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 720px;
            margin-bottom: 36px;
        }
        /* 导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(21, 26, 34, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
        }
        .navbar {
            padding: 12px 0;
            background: transparent;
        }
        .navbar .navbar-brand {
            font-size: 1.55rem;
            font-weight: 800;
            color: #FFFFFF;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 0;
        }
        .navbar .navbar-brand:hover {
            color: #FFFFFF;
        }
        .navbar .navbar-brand .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--primary);
            border-radius: 10px;
            font-size: 1.1rem;
            color: #FFFFFF;
            flex-shrink: 0;
        }
        .navbar .nav-link {
            color: #B0B8C4;
            font-size: 0.95rem;
            font-weight: 500;
            padding: 8px 16px !important;
            transition: color var(--transition-fast);
            position: relative;
        }
        .navbar .nav-link:hover,
        .navbar .nav-link.active {
            color: #FFFFFF;
        }
        .navbar .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .btn-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            background: var(--primary);
            color: #FFFFFF !important;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-primary);
            white-space: nowrap;
        }
        .btn-nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 14px 34px rgba(255, 90, 54, 0.38);
            color: #FFFFFF;
        }
        /* 面包屑 + 页头 */
        .page-hero-plain {
            padding: 48px 0 40px;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb {
            margin-bottom: 16px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .breadcrumb-item a {
            color: var(--text-secondary);
        }
        .breadcrumb-item a:hover {
            color: var(--primary);
        }
        .breadcrumb-item.active {
            color: var(--primary);
            font-weight: 600;
        }
        .page-hero-plain h1 {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--ink);
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }
        .page-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 800px;
            margin-bottom: 0;
        }
        /* 技术卡片网格 */
        .tech-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 24px;
            margin-top: 24px;
        }
        .tech-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow);
        }
        .tech-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .tech-card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-bottom: 1px solid var(--border);
        }
        .tech-card-body {
            padding: 20px 20px 24px;
        }
        .tech-card-body h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 10px;
        }
        .tech-card-body p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 14px;
        }
        .tech-card-body ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .tech-card-body ul li {
            font-size: 0.9rem;
            color: var(--text-muted);
            padding: 4px 0;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .tech-card-body ul li i {
            color: var(--accent);
            font-size: 0.8rem;
        }
        /* 架构图文 */
        .architecture-img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            width: 100%;
            object-fit: cover;
        }
        .check-list {
            list-style: none;
            padding: 0;
            margin: 20px 0 0;
        }
        .check-list li {
            padding: 6px 0;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .check-list li i {
            color: var(--accent);
        }
        /* 性能指标 */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 24px;
            margin-top: 24px;
        }
        .metric-item {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 28px 20px;
            text-align: center;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all var(--transition);
        }
        .metric-item:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-hover);
        }
        .metric-value {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--ink);
            line-height: 1.2;
            display: block;
            margin-bottom: 8px;
        }
        .metric-label {
            font-size: 0.95rem;
            color: var(--text-secondary);
        }
        /* 兼容性标签 */
        .compat-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 24px;
        }
        .compat-tag {
            background: var(--bg-white);
            border: 1px solid var(--border);
            color: var(--text-secondary);
            padding: 10px 20px;
            border-radius: var(--radius-pill);
            font-size: 0.95rem;
            font-weight: 500;
            transition: all var(--transition-fast);
        }
        .compat-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(255,90,54,0.04);
        }
        /* API 行 */
        .api-row {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
            margin-top: 24px;
        }
        .api-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px;
            transition: all var(--transition);
            box-shadow: var(--shadow);
        }
        .api-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-hover);
        }
        .api-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 8px;
        }
        .api-card .api-method {
            font-family: var(--font-mono);
            font-size: 0.8rem;
            color: var(--primary);
            background: rgba(255,90,54,0.08);
            padding: 2px 8px;
            border-radius: var(--radius-sm);
            display: inline-block;
            margin-bottom: 10px;
        }
        .api-card p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-bottom: 0;
        }
        /* 服务保障 */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
            margin-top: 24px;
        }
        .service-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            background: var(--bg);
            border-radius: var(--radius);
            padding: 20px;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .service-item:hover {
            border-color: var(--primary);
            background: #FFFFFF;
        }
        .service-icon {
            width: 48px;
            height: 48px;
            background: rgba(0,194,168,0.1);
            color: var(--accent-dark);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            flex-shrink: 0;
        }
        .service-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .service-item p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin: 0;
        }
        /* FAQ */
        .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius) !important;
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--bg-white);
        }
        .accordion-button {
            font-weight: 600;
            color: var(--ink);
            background: var(--bg-white);
            padding: 16px 20px;
            transition: all var(--transition-fast);
        }
        .accordion-button:not(.collapsed) {
            background: rgba(255,90,54,0.04);
            color: var(--primary);
            box-shadow: none;
        }
        .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--primary);
            outline-offset: -2px;
        }
        .accordion-button:not(.collapsed)::after {
            background-image: none;
        }
        .accordion-body {
            color: var(--text-secondary);
            font-size: 0.95rem;
            padding: 16px 20px;
            background: var(--bg-white);
        }
        /* CTA */
        .cta-section {
            background-image: linear-gradient(135deg, rgba(21,26,34,0.92) 0%, rgba(21,26,34,0.88) 100%),
                              url('/assets/images/f03a3f48a931c06b.webp');
            background-size: cover;
            background-position: center;
            padding: 72px 0;
            color: #FFFFFF;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: #D1D5DB;
            max-width: 680px;
            margin: 0 auto 28px;
        }
        .btn-primary {
            background: var(--primary);
            border: none;
            padding: 12px 28px;
            font-weight: 600;
            border-radius: var(--radius-pill);
            color: #FFFFFF;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-primary);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 14px 34px rgba(255,90,54,0.4);
            color: #FFFFFF;
        }
        .btn-outline-light {
            background: transparent;
            border: 1px solid rgba(255,255,255,0.5);
            color: #FFFFFF;
            padding: 12px 28px;
            font-weight: 600;
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
        }
        .btn-outline-light:hover {
            background: rgba(255,255,255,0.1);
            border-color: #FFFFFF;
            color: #FFFFFF;
        }
        /* 页脚 */
        .site-footer {
            background: var(--bg-dark);
            color: #B0B8C4;
            padding: 64px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 1.6rem;
            font-weight: 800;
            color: #FFFFFF;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 16px;
        }
        .footer-logo .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--primary);
            border-radius: 10px;
            font-size: 1.1rem;
            color: #FFFFFF;
        }
        .footer-brand p {
            color: #9CA3AF;
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .footer-col h5 {
            color: #FFFFFF;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 20px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: #9CA3AF;
            font-size: 0.95rem;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--primary);
        }
        .footer-col ul li a i {
            margin-right: 8px;
            width: 16px;
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.9rem;
            color: #6B7280;
        }
        .footer-bottom a {
            color: #9CA3AF;
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }
        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: var(--bg-dark);
                padding: 20px;
                border-radius: 0 0 var(--radius) var(--radius);
                margin-top: 12px;
            }
            .btn-nav-cta {
                margin-top: 12px;
                display: flex;
                justify-content: center;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 767.98px) {
            section {
                padding: var(--section-padding-mobile);
            }
            .page-hero-plain {
                padding: 32px 0 28px;
            }
            .page-hero-plain h1 {
                font-size: 2rem;
            }
            .tech-grid {
                grid-template-columns: 1fr;
            }
            .metrics-grid {
                grid-template-columns: 1fr 1fr;
            }
            .api-row {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 575.98px) {
            .metrics-grid {
                grid-template-columns: 1fr;
            }
            .tech-card-img {
                height: 150px;
            }
        }

/* roulang page: category6 */
:root {
            --ink: #151A22;
            --primary: #FF5A36;
            --primary-dark: #E8451E;
            --accent: #00C2A8;
            --accent-dark: #009A86;
            --bg: #F5F7FA;
            --bg-white: #FFFFFF;
            --bg-dark: #151A22;
            --text: #1F2937;
            --text-secondary: #4B5563;
            --text-muted: #6B7280;
            --border: #E5E7EB;
            --border-strong: #D1D5DB;
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 18px;
            --radius-pill: 999px;
            --shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 14px 36px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.12);
            --shadow-primary: 0 10px 28px rgba(255, 90, 54, 0.28);
            --transition-fast: 0.18s ease;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            --font-mono: "Inter", "SF Mono", system-ui, monospace;
            --section-padding: 84px 0;
            --section-padding-mobile: 48px 0;
            --container-max: 1200px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            box-shadow: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        input {
            font-family: inherit;
        }
        .container-xl {
            max-width: var(--container-max);
        }
        section {
            padding: var(--section-padding);
            position: relative;
        }
        .section-alt {
            background-color: var(--bg-white);
        }
        .section-dark {
            background-color: var(--bg-dark);
            color: #E5E7EB;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            background: rgba(255, 90, 54, 0.08);
            color: var(--primary);
            border-radius: var(--radius-pill);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }
        .section-label i {
            font-size: 0.8rem;
        }
        .section-desc {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 720px;
            margin-bottom: 36px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(21, 26, 34, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
        }
        .navbar {
            padding: 12px 0;
            background: transparent;
        }
        .navbar .navbar-brand {
            font-size: 1.55rem;
            font-weight: 800;
            color: #FFFFFF;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 0;
        }
        .navbar .navbar-brand:hover {
            color: #FFFFFF;
        }
        .navbar .navbar-brand .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--primary);
            border-radius: 10px;
            font-size: 1.1rem;
            color: #FFFFFF;
            flex-shrink: 0;
        }
        .navbar .nav-link {
            color: #B0B8C4;
            font-size: 0.95rem;
            font-weight: 500;
            padding: 8px 16px !important;
            transition: color var(--transition-fast);
            position: relative;
        }
        .navbar .nav-link:hover,
        .navbar .nav-link.active {
            color: #FFFFFF;
        }
        .navbar .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .btn-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            background: var(--primary);
            color: #FFFFFF !important;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-primary);
            white-space: nowrap;
        }
        .btn-nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 14px 34px rgba(255, 90, 54, 0.38);
        }
        .page-header {
            background: linear-gradient(135deg, #151A22 0%, #1F2937 60%, #263238 100%);
            padding: 60px 0 56px;
            position: relative;
            overflow: hidden;
        }
        .page-header::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: rgba(255, 90, 54, 0.08);
            pointer-events: none;
        }
        .page-header::after {
            content: '';
            position: absolute;
            bottom: -160px;
            left: -100px;
            width: 380px;
            height: 380px;
            border-radius: 50%;
            background: rgba(0, 194, 168, 0.06);
            pointer-events: none;
        }
        .breadcrumb-service {
            background: transparent;
            margin: 0 0 20px;
            padding: 0;
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: #9AA4B2;
            list-style: none;
        }
        .breadcrumb-service li {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb-service li+li::before {
            content: '/';
            color: #5A6474;
            font-size: 0.8rem;
        }
        .breadcrumb-service a {
            color: #9AA4B2;
            transition: color var(--transition-fast);
        }
        .breadcrumb-service a:hover {
            color: var(--primary);
        }
        .breadcrumb-service .current {
            color: #FFFFFF;
            font-weight: 500;
        }
        .page-header h1 {
            color: #FFFFFF;
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: 0.5px;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }
        .page-header .header-desc {
            color: #B0B8C4;
            font-size: 1.05rem;
            max-width: 680px;
            line-height: 1.8;
            position: relative;
            z-index: 1;
        }
        .intro-service-section {
            padding: 64px 0 56px;
            background: var(--bg-white);
        }
        .intro-service-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .intro-service-text h2 {
            font-size: 1.65rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 18px;
            line-height: 1.4;
        }
        .intro-service-text p {
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.85;
            margin-bottom: 16px;
        }
        .intro-service-image img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            width: 100%;
            height: 340px;
            object-fit: cover;
        }
        .service-stats-row {
            display: flex;
            gap: 32px;
            margin-top: 28px;
            flex-wrap: wrap;
        }
        .service-stat-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.95rem;
            color: var(--text-secondary);
        }
        .service-stat-item i {
            color: var(--accent);
            font-size: 1.1rem;
        }
        .service-cards-section {
            padding: 72px 0 64px;
            background: var(--bg);
        }
        .service-cards-section .section-head {
            margin-bottom: 32px;
        }
        .service-cards-section .section-head h2 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 10px;
        }
        .service-cards-section .section-head p {
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0;
        }
        .service-card-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .service-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 26px 28px;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            display: flex;
            gap: 18px;
            align-items: flex-start;
            position: relative;
            overflow: hidden;
        }
        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--primary);
            opacity: 0;
            transition: opacity var(--transition);
        }
        .service-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .service-card:hover::before {
            opacity: 1;
        }
        .service-card-icon {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            background: rgba(255, 90, 54, 0.08);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--primary);
        }
        .service-card-content {
            flex: 1;
        }
        .service-card-content h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .service-card-content p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin-bottom: 12px;
            line-height: 1.7;
        }
        .service-card-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .service-card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            background: #F5F7FA;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            border: 1px solid var(--border);
        }
        .service-card-meta i {
            color: var(--accent);
            font-size: 0.8rem;
        }
        .flow-section {
            padding: 72px 0 64px;
            background: var(--bg-white);
        }
        .flow-section .section-head {
            margin-bottom: 40px;
        }
        .flow-section .section-head h2 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 10px;
        }
        .flow-section .section-head p {
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0;
        }
        .flow-timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }
        .flow-timeline::before {
            content: '';
            position: absolute;
            top: 26px;
            left: 12%;
            right: 12%;
            height: 2px;
            background: var(--border);
            z-index: 0;
        }
        .flow-step {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 0 8px;
        }
        .flow-step-num {
            width: 52px;
            height: 52px;
            background: var(--bg-white);
            border: 2px solid var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin: 0 auto 16px;
            transition: all var(--transition-fast);
        }
        .flow-step:hover .flow-step-num {
            background: var(--primary);
            color: #FFFFFF;
            box-shadow: var(--shadow-primary);
        }
        .flow-step h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 6px;
        }
        .flow-step p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }
        .test-tool-section {
            padding: 72px 0 64px;
            background: var(--bg-dark);
            color: #E5E7EB;
        }
        .test-tool-section .section-head {
            margin-bottom: 32px;
        }
        .test-tool-section .section-head h2 {
            font-size: 1.75rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 10px;
        }
        .test-tool-section .section-head p {
            color: #9AA4B2;
            max-width: 640px;
            margin: 0;
        }
        .test-tool-panel {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            padding: 36px 40px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }
        .test-tool-form label {
            display: block;
            font-size: 0.9rem;
            font-weight: 500;
            color: #D1D5DB;
            margin-bottom: 8px;
        }
        .test-tool-form select,
        .test-tool-form input {
            width: 100%;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.15);
            background: rgba(255, 255, 255, 0.06);
            color: #FFFFFF;
            font-size: 0.95rem;
            margin-bottom: 18px;
            transition: border-color var(--transition-fast);
        }
        .test-tool-form select:focus,
        .test-tool-form input:focus {
            outline: none;
            border-color: var(--primary);
        }
        .test-tool-form select option {
            background: #151A22;
            color: #FFFFFF;
        }
        .test-tool-result {
            background: rgba(0, 194, 168, 0.08);
            border: 1px solid rgba(0, 194, 168, 0.25);
            border-radius: var(--radius);
            padding: 24px 28px;
            text-align: center;
        }
        .test-tool-result .result-value {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 6px;
            font-family: var(--font-mono);
        }
        .test-tool-result .result-label {
            font-size: 0.9rem;
            color: #9AA4B2;
        }
        .btn-test-run {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: var(--primary);
            color: #FFFFFF !important;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-primary);
            width: 100%;
            justify-content: center;
        }
        .btn-test-run:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
        }
        .faq-section {
            padding: 72px 0 64px;
            background: var(--bg-white);
        }
        .faq-section .section-head {
            margin-bottom: 32px;
        }
        .faq-section .section-head h2 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 10px;
        }
        .faq-section .section-head p {
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0;
        }
        .faq-accordion .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
            background: var(--bg-white);
        }
        .faq-accordion .accordion-button {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 0.98rem;
            color: var(--text);
            background: var(--bg-white);
            border: none;
            box-shadow: none;
            transition: all var(--transition-fast);
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(255, 90, 54, 0.04);
            color: var(--primary);
            box-shadow: none;
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--primary);
            outline-offset: -2px;
        }
        .faq-accordion .accordion-button::after {
            filter: brightness(0.5);
            transition: transform var(--transition-fast);
        }
        .faq-accordion .accordion-body {
            padding: 18px 24px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.8;
            background: #FAFBFC;
        }
        .faq-accordion .accordion-collapse {
            border-top: 1px solid var(--border);
        }
        .data-guarantee-section {
            padding: 72px 0 64px;
            background: var(--bg);
        }
        .data-guarantee-section .section-head {
            margin-bottom: 36px;
        }
        .data-guarantee-section .section-head h2 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 10px;
        }
        .data-guarantee-section .section-head p {
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0;
        }
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .guarantee-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px 22px;
            text-align: center;
            transition: all var(--transition);
            box-shadow: var(--shadow);
        }
        .guarantee-item:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .guarantee-item .guarantee-value {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
            font-family: var(--font-mono);
        }
        .guarantee-item .guarantee-label {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin: 0;
        }
        .ticket-section {
            padding: 72px 0 64px;
            background: var(--bg-white);
        }
        .ticket-section .section-head {
            margin-bottom: 32px;
        }
        .ticket-section .section-head h2 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 10px;
        }
        .ticket-section .section-head p {
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0;
        }
        .ticket-panel {
            background: #FAFBFC;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 36px 40px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }
        .ticket-form label {
            display: block;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text);
            margin-bottom: 8px;
        }
        .ticket-form input,
        .ticket-form select,
        .ticket-form textarea {
            width: 100%;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-strong);
            background: var(--bg-white);
            font-size: 0.95rem;
            margin-bottom: 16px;
            transition: border-color var(--transition-fast);
            font-family: var(--font-family);
        }
        .ticket-form input:focus,
        .ticket-form select:focus,
        .ticket-form textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(255, 90, 54, 0.1);
        }
        .ticket-form textarea {
            resize: vertical;
            min-height: 100px;
        }
        .ticket-info {
            display: flex;
            flex-direction: column;
            gap: 16px;
            justify-content: center;
        }
        .ticket-info-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 16px 18px;
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
        }
        .ticket-info-item i {
            color: var(--primary);
            font-size: 1.2rem;
            margin-top: 3px;
            flex-shrink: 0;
        }
        .ticket-info-item h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 4px;
        }
        .ticket-info-item p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin: 0;
        }
        .btn-submit-ticket {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 30px;
            background: var(--primary);
            color: #FFFFFF !important;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-primary);
        }
        .btn-submit-ticket:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
        }
        .cta-band {
            padding: 56px 0 48px;
            background: linear-gradient(135deg, #FF5A36 0%, #E8451E 100%);
            color: #FFFFFF;
            position: relative;
            overflow: hidden;
        }
        .cta-band::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            pointer-events: none;
        }
        .cta-band h2 {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }
        .cta-band p {
            font-size: 1rem;
            opacity: 0.9;
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
            max-width: 560px;
        }
        .btn-cta-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 32px;
            background: #FFFFFF;
            color: var(--primary-dark) !important;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.98rem;
            border: none;
            transition: all var(--transition-fast);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
            position: relative;
            z-index: 1;
        }
        .btn-cta-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 34px rgba(0, 0, 0, 0.2);
            color: var(--primary-dark);
        }
        .site-footer {
            background: #0D1117;
            color: #B0B8C4;
            padding: 56px 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 36px;
            padding-bottom: 40px;
        }
        .footer-logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: #FFFFFF;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
            letter-spacing: 1px;
        }
        .footer-logo .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            background: var(--primary);
            border-radius: 8px;
            font-size: 1rem;
            color: #FFFFFF;
        }
        .footer-brand p {
            font-size: 0.88rem;
            color: #8A94A6;
            line-height: 1.8;
            margin: 0;
        }
        .footer-col h5 {
            color: #FFFFFF;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: #8A94A6;
            font-size: 0.88rem;
            transition: color var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul li a:hover {
            color: var(--primary);
        }
        .footer-col ul li a i {
            font-size: 0.8rem;
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 18px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 0.82rem;
            color: #6B7280;
        }
        .footer-bottom a {
            color: #8A94A6;
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }
        @media (max-width: 992px) {
            .intro-service-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .intro-service-image img {
                height: 260px;
            }
            .service-card-grid {
                grid-template-columns: 1fr;
            }
            .flow-timeline {
                grid-template-columns: repeat(2, 1fr);
            }
            .flow-timeline::before {
                display: none;
            }
            .guarantee-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .test-tool-panel {
                grid-template-columns: 1fr;
                padding: 28px 24px;
            }
            .ticket-panel {
                grid-template-columns: 1fr;
                padding: 28px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .navbar .navbar-nav {
                padding: 16px 0;
                gap: 4px;
            }
            .btn-nav-cta {
                margin-top: 12px;
                justify-content: center;
                width: 100%;
            }
        }
        @media (max-width: 768px) {
            section {
                padding: var(--section-padding-mobile);
            }
            .page-header {
                padding: 40px 0 36px;
            }
            .page-header h1 {
                font-size: 1.7rem;
            }
            .service-card-grid {
                grid-template-columns: 1fr;
            }
            .flow-timeline {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .flow-step {
                text-align: left;
                display: flex;
                align-items: flex-start;
                gap: 16px;
                padding: 0;
            }
            .flow-step-num {
                margin: 0;
                flex-shrink: 0;
            }
            .flow-step h4 {
                margin-bottom: 2px;
            }
            .guarantee-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .guarantee-item {
                padding: 18px 14px;
            }
            .guarantee-item .guarantee-value {
                font-size: 1.6rem;
            }
            .ticket-panel {
                padding: 22px 18px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .service-card {
                flex-direction: column;
                gap: 14px;
            }
            .navbar .navbar-brand {
                font-size: 1.3rem;
            }
            .navbar .nav-link {
                padding: 10px 16px !important;
            }
            .navbar .nav-link.active::after {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .guarantee-grid {
                grid-template-columns: 1fr;
            }
            .breadcrumb-service {
                font-size: 0.8rem;
                flex-wrap: wrap;
            }
            .page-header h1 {
                font-size: 1.5rem;
            }
            .service-card {
                padding: 20px 18px;
            }
            .test-tool-panel {
                padding: 20px 16px;
            }
            .ticket-panel {
                padding: 20px 16px;
            }
        }

/* roulang page: category5 */
:root {
            --ink: #151A22;
            --primary: #FF5A36;
            --primary-dark: #E8451E;
            --accent: #00C2A8;
            --accent-dark: #009A86;
            --bg: #F5F7FA;
            --bg-white: #FFFFFF;
            --bg-dark: #151A22;
            --text: #1F2937;
            --text-secondary: #4B5563;
            --text-muted: #6B7280;
            --border: #E5E7EB;
            --border-strong: #D1D5DB;
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 18px;
            --radius-pill: 999px;
            --shadow: 0 8px 24px rgba(0,0,0,0.06);
            --shadow-hover: 0 14px 36px rgba(0,0,0,0.10);
            --shadow-lg: 0 20px 50px rgba(0,0,0,0.12);
            --shadow-primary: 0 10px 28px rgba(255,90,54,0.28);
            --transition-fast: 0.18s ease;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            --font-mono: "Inter", "SF Mono", system-ui, monospace;
            --section-padding: 84px 0;
            --section-padding-mobile: 48px 0;
            --container-max: 1200px;
        }
        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            margin: 0;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            box-shadow: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        input {
            font-family: inherit;
        }
        .container-xl {
            max-width: var(--container-max);
        }
        section {
            padding: var(--section-padding);
            position: relative;
        }
        .section-alt {
            background-color: var(--bg-white);
        }
        .section-dark {
            background-color: var(--bg-dark);
            color: #E5E7EB;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            background: rgba(255, 90, 54, 0.08);
            color: var(--primary);
            border-radius: var(--radius-pill);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }
        .section-label i {
            font-size: 0.8rem;
        }
        .section-desc {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 720px;
            margin-bottom: 36px;
        }

        /* 导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(21, 26, 34, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
        }
        .navbar {
            padding: 12px 0;
            background: transparent;
        }
        .navbar .navbar-brand {
            font-size: 1.55rem;
            font-weight: 800;
            color: #FFFFFF;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 0;
        }
        .navbar .navbar-brand:hover {
            color: #FFFFFF;
        }
        .navbar .navbar-brand .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--primary);
            border-radius: 10px;
            font-size: 1.1rem;
            color: #FFFFFF;
            flex-shrink: 0;
        }
        .navbar .nav-link {
            color: #B0B8C4;
            font-size: 0.95rem;
            font-weight: 500;
            padding: 8px 16px !important;
            transition: color var(--transition-fast);
            position: relative;
        }
        .navbar .nav-link:hover,
        .navbar .nav-link.active {
            color: #FFFFFF;
        }
        .navbar .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .btn-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            background: var(--primary);
            color: #FFFFFF !important;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-primary);
            white-space: nowrap;
        }
        .btn-nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 14px 34px rgba(255, 90, 54, 0.38);
        }
        .navbar-toggler {
            padding: 8px 10px;
            border: 1px solid rgba(255, 255, 255, 0.25);
            background: transparent;
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 2px rgba(255, 90, 54, 0.5);
        }
        .navbar-toggler .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255, 255, 255, 0.85)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }
        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: rgba(21, 26, 34, 0.98);
                padding: 16px 0;
                border-top: 1px solid rgba(255, 255, 255, 0.08);
                margin-top: 12px;
            }
            .navbar-nav {
                gap: 6px;
            }
            .btn-nav-cta {
                margin-left: 0;
                margin-top: 12px;
                width: 100%;
                justify-content: center;
            }
        }

        /* 面包屑 */
        .breadcrumb {
            margin-bottom: 24px;
            background: transparent;
            padding: 0;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .breadcrumb-item + .breadcrumb-item::before {
            content: "/";
            color: var(--text-muted);
            opacity: 0.6;
        }
        .breadcrumb-item a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb-item.active {
            color: var(--text-secondary);
        }

        /* 页面头部 */
        .page-head-section {
            background-color: var(--bg-white);
            padding: 48px 0 64px;
            border-bottom: 1px solid var(--border);
        }
        .head-row {
            display: grid;
            grid-template-columns: 1fr 420px;
            gap: 40px;
            align-items: center;
        }
        .head-title {
            font-size: 2.75rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--ink);
            margin-bottom: 18px;
            letter-spacing: -0.5px;
        }
        .head-title span {
            color: var(--primary);
        }
        .head-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin-bottom: 0;
        }
        .head-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            background: var(--bg);
        }
        .head-image img {
            width: 100%;
            height: 260px;
            object-fit: cover;
        }

        /* 新闻时间线 */
        .news-feed-section {
            background-color: var(--bg);
        }
        .news-feed-section .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 40px;
        }
        .news-feed-section .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 0;
        }
        .news-feed-section .section-header .section-desc {
            margin-bottom: 0;
            max-width: 480px;
            font-size: 0.95rem;
        }
        .timeline {
            position: relative;
            padding-left: 32px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 12px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: linear-gradient(180deg, var(--primary) 0%, var(--accent) 100%);
            border-radius: 2px;
            opacity: 0.5;
        }
        .timeline-item {
            position: relative;
            margin-bottom: 36px;
            padding-left: 28px;
        }
        .timeline-item:last-child {
            margin-bottom: 0;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -26px;
            top: 10px;
            width: 14px;
            height: 14px;
            background: var(--primary);
            border-radius: 50%;
            border: 3px solid var(--bg-white);
            box-shadow: 0 0 0 2px var(--primary);
            z-index: 1;
        }
        .news-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 22px 24px;
            display: grid;
            grid-template-columns: 150px 1fr auto;
            gap: 22px;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow);
        }
        .news-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .news-thumb {
            width: 150px;
            height: 110px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            background: var(--bg);
            flex-shrink: 0;
        }
        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .news-card:hover .news-thumb img {
            transform: scale(1.05);
        }
        .news-content {
            min-width: 0;
        }
        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .news-date {
            color: var(--primary);
            font-weight: 600;
            white-space: nowrap;
        }
        .news-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .news-excerpt {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 12px;
            line-height: 1.7;
        }
        .btn-readmore {
            background: transparent;
            border: 1px solid var(--border-strong);
            color: var(--text);
            border-radius: var(--radius-sm);
            padding: 6px 18px;
            font-size: 0.88rem;
            font-weight: 600;
            transition: all var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }
        .btn-readmore:hover {
            background: rgba(255, 90, 54, 0.06);
            border-color: var(--primary);
            color: var(--primary);
        }

        /* 热门资讯 */
        .hot-topics-section {
            background-color: var(--bg-white);
        }
        .hot-topics-section .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 32px;
        }
        .hot-topics-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 0;
        }
        .topic-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .topic-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            background: var(--bg);
            border-radius: var(--radius-pill);
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            border: 1px solid var(--border);
            transition: all var(--transition-fast);
            cursor: default;
        }
        .topic-tag i {
            color: var(--primary);
            font-size: 0.8rem;
        }
        .topic-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(255, 90, 54, 0.04);
        }

        /* 行业活动 */
        .events-section {
            background-color: var(--bg);
        }
        .events-section .section-header {
            margin-bottom: 32px;
        }
        .events-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--ink);
        }
        .event-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 24px;
        }
        .event-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 22px;
            box-shadow: var(--shadow);
            transition: all var(--transition-fast);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .event-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .event-icon {
            width: 44px;
            height: 44px;
            background: rgba(255, 90, 54, 0.1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.2rem;
            margin-bottom: 4px;
        }
        .event-name {
            font-weight: 700;
            color: var(--ink);
            font-size: 1.05rem;
            line-height: 1.4;
        }
        .event-meta {
            color: var(--text-muted);
            font-size: 0.85rem;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* 新闻搜索与订阅 */
        .news-tools-section {
            background-color: var(--bg-dark);
            color: #E5E7EB;
        }
        .tools-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 36px;
            align-items: start;
        }
        .tools-block h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 12px;
        }
        .tools-block p {
            color: #B0B8C4;
            font-size: 0.95rem;
            margin-bottom: 20px;
        }
        .search-box {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .search-box .form-control {
            flex: 1;
            min-width: 180px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.18);
            color: #FFFFFF;
            border-radius: var(--radius-sm);
            padding: 12px 16px;
        }
        .search-box .form-control::placeholder {
            color: #8A94A3;
        }
        .search-box .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 0.2rem rgba(255, 90, 54, 0.2);
            background: rgba(255, 255, 255, 0.08);
        }
        .btn-primary-action {
            background: var(--primary);
            border: none;
            color: #FFFFFF;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: all var(--transition-fast);
        }
        .btn-primary-action:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-primary);
        }
        .subscribe-box {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .subscribe-box .form-control {
            flex: 1;
            min-width: 180px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.18);
            color: #FFFFFF;
            border-radius: var(--radius-sm);
            padding: 12px 16px;
        }
        .subscribe-box .form-control::placeholder {
            color: #8A94A3;
        }
        .subscribe-box .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 0.2rem rgba(255, 90, 54, 0.2);
            background: rgba(255, 255, 255, 0.08);
        }

        /* 数据指标 */
        .news-stats-section {
            background-color: var(--bg-white);
        }
        .news-stats-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 28px;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 20px;
        }
        .stat-item {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 24px;
            text-align: center;
            border: 1px solid var(--border);
            transition: all var(--transition-fast);
        }
        .stat-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow);
        }
        .stat-value {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
            font-family: var(--font-mono);
        }
        .stat-label {
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
        }

        /* CTA */
        .cta-section {
            background-color: var(--bg-dark);
            color: #FFFFFF;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: #B0B8C4;
            font-size: 1.05rem;
            max-width: 620px;
            margin-left: auto;
            margin-right: auto;
            margin-bottom: 28px;
        }
        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-cta-light {
            background: var(--primary);
            border: none;
            color: #FFFFFF;
            padding: 14px 34px;
            border-radius: var(--radius-pill);
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            box-shadow: var(--shadow-primary);
        }
        .btn-cta-light:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 16px 38px rgba(255, 90, 54, 0.4);
        }
        .btn-cta-outline {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.4);
            color: #FFFFFF;
            padding: 14px 28px;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-cta-outline:hover {
            border-color: #FFFFFF;
            background: rgba(255, 255, 255, 0.08);
            color: #FFFFFF;
        }

        /* 页脚 */
        .site-footer {
            background-color: #0F141C;
            color: #B0B8C4;
            padding: 48px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 36px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: #FFFFFF;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }
        .footer-logo .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            background: var(--primary);
            border-radius: 8px;
            font-size: 1rem;
            color: #FFFFFF;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: #8A94A3;
            max-width: 360px;
        }
        .footer-col h5 {
            color: #FFFFFF;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: #8A94A3;
            text-decoration: none;
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: #FFFFFF;
        }
        .footer-bottom {
            padding: 18px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: #6B7280;
        }
        .footer-bottom a {
            color: #8A94A3;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: #FFFFFF;
        }

        /* 表单错误状态 */
        .form-control.is-invalid {
            border-color: #dc3545;
            background-image: none;
        }
        .form-control.is-invalid:focus {
            border-color: #dc3545;
            box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.15);
        }

        /* 响应式 */
        @media (max-width: 1100px) {
            .head-row {
                grid-template-columns: 1fr;
            }
            .head-image {
                max-width: 420px;
            }
            .news-card {
                grid-template-columns: 120px 1fr;
            }
            .news-thumb {
                width: 120px;
                height: 90px;
            }
            .tool-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 767.98px) {
            section {
                padding: var(--section-padding-mobile);
            }
            .head-title {
                font-size: 2.2rem;
            }
            .news-feed-section .section-header,
            .hot-topics-section .section-header {
                flex-direction: column;
                align-items: flex-start;
            }
            .timeline {
                padding-left: 20px;
            }
            .timeline::before {
                left: 8px;
            }
            .timeline-item {
                padding-left: 16px;
            }
            .timeline-item::before {
                left: -18px;
                width: 12px;
                height: 12px;
            }
            .news-card {
                grid-template-columns: 1fr;
                padding: 18px;
            }
            .news-thumb {
                width: 100%;
                height: 180px;
            }
            .tools-grid {
                grid-template-columns: 1fr;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media (max-width: 519.98px) {
            .head-title {
                font-size: 1.9rem;
            }
            .news-title {
                font-size: 1.05rem;
            }
            .search-box .form-control,
            .subscribe-box .form-control {
                min-width: 140px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}