/* roulang page: index */
:root {
            --primary: #6C5CE7;
            --primary-dark: #5646c9;
            --secondary-cyan: #00D2D3;
            --secondary-red: #FF4757;
            --brand-gradient: linear-gradient(135deg, #6C5CE7 0%, #FF4757 100%);
            --cyan-gradient: linear-gradient(135deg, #6C5CE7 0%, #00D2D3 100%);
            --bg-light: #F8F9FE;
            --bg-white: #FFFFFF;
            --bg-dark: #13141F;
            --bg-dark-card: #1C1E2E;
            --text-main: #1E202A;
            --text-sub: #5E6478;
            --text-muted: #8E95A5;
            --card-radius: 20px;
            --badge-radius: 50px;
            --border-light: rgba(108, 92, 231, 0.1);
            --shadow-normal: 0 10px 30px rgba(0, 0, 0, 0.04);
            --shadow-hover: 0 20px 40px rgba(108, 92, 231, 0.14);
            --transition-smooth: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }

        html {
            scroll-behavior: smooth;
            overflow-x: hidden;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-light);
            color: var(--text-main);
            font-size: 16px;
            line-height: 1.7;
            overflow-x: hidden;
            position: relative;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition-smooth);
        }

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

        /* 顶部双层滚动收缩导航 */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1040;
            background: rgba(255, 255, 255, 0.98);
            border-bottom: 1px solid var(--border-light);
            transition: all 0.35s ease;
        }

        .header-topbar {
            background-color: var(--bg-dark);
            color: rgba(255, 255, 255, 0.85);
            font-size: 13px;
            padding: 8px 0;
            transition: all 0.3s ease;
            max-height: 44px;
            overflow: hidden;
        }

        .status-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            background-color: #00E676;
            border-radius: 50%;
            margin-right: 6px;
            box-shadow: 0 0 8px #00E676;
            animation: pulseDot 2s infinite;
        }

        @keyframes pulseDot {
            0%, 100% { transform: scale(1); opacity: 1; }
            50% { transform: scale(1.3); opacity: 0.6; }
        }

        .header-mainbar {
            padding: 16px 0;
            transition: all 0.3s ease;
        }

        .site-header.is-scrolled {
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }

        .site-header.is-scrolled .header-topbar {
            max-height: 0;
            padding: 0;
            opacity: 0;
        }

        .site-header.is-scrolled .header-mainbar {
            padding: 10px 0;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 800;
            font-size: 22px;
            color: var(--text-main);
        }

        .brand-logo-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: var(--brand-gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            box-shadow: 0 6px 16px rgba(108, 92, 231, 0.3);
        }

        .brand-sub-tag {
            font-size: 11px;
            font-weight: 600;
            padding: 2px 8px;
            background: rgba(108, 92, 231, 0.1);
            color: var(--primary);
            border-radius: 50px;
            margin-left: 4px;
        }

        .nav-menu-list {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu-list .nav-link {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-sub);
            padding: 8px 15px;
            border-radius: 50px;
            transition: var(--transition-smooth);
        }

        .nav-menu-list .nav-link:hover,
        .nav-menu-list .nav-link.active {
            color: var(--primary);
            background-color: rgba(108, 92, 231, 0.08);
        }

        /* 按钮体系 */
        .btn-brand {
            background: var(--brand-gradient);
            color: #fff !important;
            font-weight: 600;
            padding: 11px 26px;
            border-radius: var(--badge-radius);
            border: none;
            box-shadow: 0 8px 20px rgba(255, 71, 87, 0.25);
            transition: var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
        }

        .btn-brand:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 26px rgba(108, 92, 231, 0.35);
            color: #fff;
        }

        .btn-outline-brand {
            background: rgba(108, 92, 231, 0.06);
            color: var(--primary) !important;
            border: 1.5px solid rgba(108, 92, 231, 0.3);
            font-weight: 600;
            padding: 11px 26px;
            border-radius: var(--badge-radius);
            transition: var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
        }

        .btn-outline-brand:hover {
            background: var(--primary);
            color: #fff !important;
            border-color: var(--primary);
            transform: translateY(-3px);
        }

        /* 数据徽章体系 */
        .data-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            border-radius: var(--badge-radius);
            font-size: 13px;
            font-weight: 700;
            background: rgba(0, 210, 211, 0.12);
            color: #009798;
            letter-spacing: 0.3px;
        }

        .data-badge-purple {
            background: rgba(108, 92, 231, 0.12);
            color: var(--primary);
        }

        .data-badge-red {
            background: rgba(255, 71, 87, 0.12);
            color: var(--secondary-red);
        }

        /* 通用圆角大卡 */
        .app-card {
            background: var(--bg-white);
            border-radius: var(--card-radius);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-normal);
            padding: 30px;
            height: 100%;
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .app-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(108, 92, 231, 0.28);
        }

        /* 通用板块间距与标题 */
        main {
            padding-top: 112px;
        }

        .section-block {
            padding: 90px 0;
            position: relative;
        }

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

        .section-bg-glow {
            background-image: radial-gradient(circle at top right, rgba(108, 92, 231, 0.09), transparent 65%),
                              radial-gradient(circle at bottom left, rgba(0, 210, 211, 0.07), transparent 60%);
        }

        .section-header {
            margin-bottom: 54px;
        }

        .section-title {
            font-size: 34px;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.3;
            margin-top: 12px;
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-sub);
            max-width: 780px;
            line-height: 1.75;
        }

        /* Section 1: Hero 首屏斜向错位 5:7 + 轮播舞台 */
        #hero {
            padding: 55px 0 85px;
            background: radial-gradient(circle at 80% 20%, rgba(108, 92, 231, 0.12), transparent 55%),
                        radial-gradient(circle at 15% 80%, rgba(255, 71, 87, 0.08), transparent 50%),
                        var(--bg-white);
            border-bottom: 1px solid var(--border-light);
        }

        .hero-h1 {
            font-size: 44px;
            font-weight: 900;
            line-height: 1.25;
            color: var(--text-main);
            margin: 18px 0 20px;
            letter-spacing: -0.5px;
        }

        .text-gradient {
            background: var(--brand-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-lead {
            font-size: 16px;
            color: var(--text-sub);
            line-height: 1.75;
            margin-bottom: 28px;
        }

        .hero-kpi-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 14px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px dashed rgba(108, 92, 231, 0.2);
        }

        .hero-kpi-item strong {
            display: block;
            font-size: 24px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }

        .hero-kpi-item span {
            font-size: 13px;
            color: var(--text-sub);
        }

        /* 斜向错位右侧轮播舞台 */
        .hero-stage-wrap {
            position: relative;
            transform: translateY(10px);
        }

        .hero-carousel-card {
            border-radius: 24px;
            overflow: hidden;
            box-shadow: 0 25px 60px rgba(19, 20, 31, 0.18);
            border: 4px solid #fff;
            position: relative;
            background: var(--bg-dark);
        }

        .hero-slide-img {
            width: 100%;
            height: 460px;
            object-fit: cover;
            opacity: 0.82;
        }

        .hero-slide-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(19,20,31,0.2) 0%, rgba(19,20,31,0.92) 100%);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            padding: 28px;
            color: #fff;
        }

        .live-stream-hud {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
        }

        .live-rec-pill {
            background: rgba(255, 71, 87, 0.9);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 5px 14px;
            border-radius: 50px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .live-rec-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #fff;
            animation: pulseDot 1.2s infinite;
        }

        .live-bitrate-pill {
            background: rgba(19, 20, 31, 0.75);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255,255,255,0.18);
            color: #00D2D3;
            font-family: monospace;
            font-size: 13px;
            padding: 5px 14px;
            border-radius: 50px;
        }

        /* 改造 Carousel 渐变圆角进度条指示器 */
        .hero-carousel-indicators {
            position: static;
            margin: 18px 0 0;
            display: flex;
            justify-content: center;
            gap: 10px;
        }

        .hero-carousel-indicators [data-bs-target] {
            width: 48px;
            height: 6px;
            border-radius: 10px;
            background-color: rgba(108, 92, 231, 0.2);
            border: none;
            transition: all 0.35s ease;
            opacity: 1;
        }

        .hero-carousel-indicators .active {
            width: 80px;
            background: var(--brand-gradient);
        }

        /* Section 2: 架构分层示意 */
        .arch-layer-box {
            background: var(--bg-light);
            border: 1px solid rgba(108, 92, 231, 0.16);
            border-radius: 16px;
            padding: 18px 22px;
            margin-bottom: 14px;
            transition: var(--transition-smooth);
        }

        .arch-layer-box:hover {
            background: #fff;
            border-color: var(--primary);
            box-shadow: var(--shadow-normal);
        }

        .hardcore-param-banner {
            background: linear-gradient(135deg, #1E202A 0%, #2C2F48 100%);
            color: #fff;
            border-radius: 18px;
            padding: 22px 26px;
            margin-top: 24px;
            border-left: 5px solid var(--secondary-cyan);
        }

        /* Section 3: 6卡片技术矩阵 */
        .tech-icon-wrap {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: rgba(108, 92, 231, 0.1);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            margin-bottom: 20px;
            transition: var(--transition-smooth);
        }

        .app-card:hover .tech-icon-wrap {
            background: var(--brand-gradient);
            color: #fff;
        }

        /* Section 4: 核心商业套件 */
        .suite-card-img {
            height: 200px;
            width: 100%;
            object-fit: cover;
            border-radius: 14px;
            margin-bottom: 20px;
        }

        .feature-check-list {
            list-style: none;
            padding: 0;
            margin: 18px 0 0;
        }

        .feature-check-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14.5px;
            color: var(--text-sub);
            margin-bottom: 10px;
        }

        .feature-check-list li i {
            color: var(--primary);
            font-size: 16px;
            margin-top: 2px;
        }

        /* Section 5: 深色高对比高并发与私有化板块 */
        #dark-concept {
            background-color: var(--bg-dark);
            color: #fff;
            background-image: radial-gradient(circle at 85% 15%, rgba(108, 92, 231, 0.25), transparent 50%),
                              radial-gradient(circle at 10% 85%, rgba(0, 210, 211, 0.18), transparent 45%);
        }

        #dark-concept .section-title {
            color: #fff;
        }

        #dark-concept .section-desc {
            color: rgba(255, 255, 255, 0.72);
        }

        .dark-node-card {
            background: var(--bg-dark-card);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--card-radius);
            padding: 28px;
            height: 100%;
            transition: var(--transition-smooth);
        }

        .dark-node-card:hover {
            transform: translateY(-6px);
            border-color: var(--secondary-cyan);
            box-shadow: 0 20px 40px rgba(0, 210, 211, 0.12);
        }

        .protocol-code-box {
            background: #0D0E17;
            border: 1px solid rgba(0, 210, 211, 0.25);
            border-radius: 16px;
            padding: 22px;
            font-family: "SFMono-Regular", Consolas, monospace;
            font-size: 13.5px;
            color: #A6ACCD;
        }

        /* Section 6: 4栏异构场景卡片 */
        .scenario-bento-card {
            border-radius: var(--card-radius);
            overflow: hidden;
            position: relative;
            min-height: 340px;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 28px;
            color: #fff;
            box-shadow: var(--shadow-normal);
            transition: var(--transition-smooth);
        }

        .scenario-bento-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }

        .scenario-bg-img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            z-index: 1;
            transition: transform 0.6s ease;
        }

        .scenario-bento-card:hover .scenario-bg-img {
            transform: scale(1.06);
        }

        .scenario-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(19,20,31,0.15) 0%, rgba(19,20,31,0.92) 85%);
            z-index: 2;
        }

        .scenario-content {
            position: relative;
            z-index: 3;
        }

        /* Section 7: 终端交互截图舞台 */
        .ui-showcase-frame {
            background: #fff;
            border-radius: 24px;
            padding: 18px;
            border: 1px solid var(--border-light);
            box-shadow: 0 18px 45px rgba(108, 92, 231, 0.1);
            transition: var(--transition-smooth);
        }

        .ui-showcase-frame:hover {
            transform: translateY(-6px);
        }

        .ui-screen-img {
            width: 100%;
            height: 280px;
            object-fit: cover;
            border-radius: 16px;
        }

        /* Section 8: 标杆案例前后对比 */
        .case-compare-box {
            background: var(--bg-white);
            border-radius: var(--card-radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            box-shadow: var(--shadow-normal);
        }

        .pain-point-pane {
            background: #FFF5F6;
            padding: 36px;
            border-right: 1px solid rgba(255, 71, 87, 0.12);
        }

        .solution-pane {
            background: #F4FBF9;
            padding: 36px;
        }

        /* Section 9: 实时关键数据指标条 */
        #metrics {
            background: var(--brand-gradient);
            color: #fff;
            padding: 70px 0;
        }

        .metric-counter-card {
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.22);
            border-radius: var(--card-radius);
            padding: 28px 22px;
            text-align: center;
            height: 100%;
        }

        .metric-value {
            font-size: 40px;
            font-weight: 900;
            line-height: 1.15;
            margin-bottom: 8px;
        }

        /* Section 10: 价格方案对比 */
        .pricing-card {
            background: var(--bg-white);
            border-radius: var(--card-radius);
            border: 1.5px solid var(--border-light);
            padding: 36px 30px;
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            transition: var(--transition-smooth);
            position: relative;
        }

        .pricing-card.featured {
            border: 2px solid var(--primary);
            box-shadow: 0 24px 50px rgba(108, 92, 231, 0.18);
            transform: translateY(-8px);
        }

        .pricing-ribbon {
            position: absolute;
            top: 18px;
            right: 18px;
            background: var(--brand-gradient);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: 50px;
        }

        .price-number {
            font-size: 36px;
            font-weight: 900;
            color: var(--text-main);
        }

        /* Section 11: 客户评价墙 */
        .avatar-circle {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            object-fit: cover;
            border: 2px solid var(--primary);
        }

        /* Section 12: 技术白皮书与行业资讯 */
        .news-thumb {
            height: 190px;
            width: 100%;
            object-fit: cover;
            border-radius: 14px;
            margin-bottom: 18px;
        }

        /* Section 13: 自定义覆写 FAQ 手风琴 */
        .custom-accordion .accordion-item {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: 16px !important;
            margin-bottom: 16px;
            box-shadow: var(--shadow-normal);
            overflow: hidden;
        }

        .custom-accordion .accordion-button {
            background: var(--bg-white);
            color: var(--text-main);
            font-weight: 700;
            font-size: 17px;
            padding: 22px 26px;
            box-shadow: none !important;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .custom-accordion .accordion-button::after {
            display: none;
        }

        .faq-toggle-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: rgba(108, 92, 231, 0.1);
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.3s ease, background 0.3s ease;
            flex-shrink: 0;
        }

        .custom-accordion .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: rgba(108, 92, 231, 0.03);
        }

        .custom-accordion .accordion-button:not(.collapsed) .faq-toggle-icon {
            transform: rotate(180deg);
            background: var(--primary);
            color: #fff;
        }

        .custom-accordion .accordion-body {
            padding: 4px 26px 24px;
            color: var(--text-sub);
            line-height: 1.75;
            font-size: 15.5px;
        }

        /* 全局底部 CTA 咨询与 Footer */
        .footer-cta-banner {
            background: linear-gradient(135deg, #13141F 0%, #261F46 60%, #4A2545 100%);
            color: #fff;
            padding: 75px 0;
            position: relative;
        }

        .consult-form-card {
            background: rgba(255, 255, 255, 0.98);
            color: var(--text-main);
            border-radius: 22px;
            padding: 36px;
            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
        }

        .form-control, .form-select {
            min-height: 48px;
            border-radius: 12px;
            border: 1px solid rgba(108, 92, 231, 0.22);
            padding: 10px 16px;
            font-size: 15px;
        }

        .form-control:focus, .form-select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.12);
        }

        .site-footer {
            background-color: #0D0E17;
            color: rgba(255, 255, 255, 0.7);
            padding: 65px 0 35px;
            font-size: 14.5px;
        }

        .footer-heading {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 20px;
        }

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

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

        .footer-links a:hover {
            color: var(--secondary-cyan);
            padding-left: 4px;
        }

        /* 响应式适配断点 */
        @media (max-width: 991.98px) {
            main {
                padding-top: 76px;
            }
            .header-topbar {
                display: none;
            }
            .hero-h1 {
                font-size: 32px;
            }
            .section-title {
                font-size: 28px;
            }
            .section-block {
                padding: 65px 0;
            }
            .pain-point-pane {
                border-right: none;
                border-bottom: 1px solid rgba(255, 71, 87, 0.15);
            }
            .pricing-card.featured {
                transform: none;
            }
        }

        @media (max-width: 575.98px) {
            .hero-h1 {
                font-size: 28px;
            }
            .hero-slide-img {
                height: 340px;
            }
            .hero-kpi-row {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .app-card, .consult-form-card {
                padding: 22px;
            }
            .metric-value {
                font-size: 30px;
            }
        }