/* roulang page: index */
:root {
            --brand-primary: #0052FF;
            --brand-gradient: linear-gradient(135deg, #0052FF 0%, #00D2FF 100%);
            --brand-volt: #10B981;
            --brand-volt-glow: #00F59B;
            --text-heading: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --bg-light: #F8FAFC;
            --bg-white: #FFFFFF;
            --bg-subtle: #F1F5F9;
            --bg-dark: #0A0F1D;
            --bg-dark-card: #111827;
            --border-light: rgba(226, 232, 240, 0.85);
            --border-dark: rgba(255, 255, 255, 0.08);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-full: 9999px;
            --shadow-card: 0 10px 25px -5px rgba(0, 82, 255, 0.06), 0 8px 10px -6px rgba(0, 0, 0, 0.03);
            --shadow-hover: 0 20px 30px -10px rgba(0, 82, 255, 0.15);
            --transition-smooth: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-light);
            color: var(--text-body);
            line-height: 1.65;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button, input, select {
            font-family: inherit;
        }

        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 顶部辅助行与主导航 */
        .header-wrapper {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-light);
        }

        .top-utility-bar {
            background-color: #0F172A;
            color: #94A3B8;
            font-size: 0.8125rem;
            padding: 6px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .top-utility-flex {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .utility-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: #E2E8F0;
        }

        .utility-links {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .utility-links a:hover {
            color: var(--brand-volt-glow);
        }

        .main-navbar {
            padding: 14px 0;
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--text-heading);
            letter-spacing: -0.5px;
        }

        .nav-logo-icon {
            width: 38px;
            height: 38px;
            background: var(--brand-gradient);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFF;
            box-shadow: 0 4px 12px rgba(0, 82, 255, 0.3);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 28px;
        }

        .nav-link {
            font-size: 0.9375rem;
            font-weight: 600;
            color: var(--text-body);
            position: relative;
            padding: 6px 0;
        }

        .nav-link:hover, .nav-link.active {
            color: var(--brand-primary);
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--brand-primary);
            transition: var(--transition-smooth);
        }

        .nav-link:hover::after {
            width: 100%;
        }

        .nav-cta-group {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 22px;
            font-size: 0.9375rem;
            font-weight: 600;
            border-radius: var(--radius-full);
            cursor: pointer;
            border: 1px solid transparent;
            transition: var(--transition-smooth);
            min-height: 44px;
        }

        .btn-ghost {
            background: transparent;
            color: var(--text-body);
            border-color: #CBD5E1;
        }

        .btn-ghost:hover {
            border-color: var(--brand-primary);
            color: var(--brand-primary);
            background: rgba(0, 82, 255, 0.04);
        }

        .btn-primary {
            background: var(--brand-gradient);
            color: #FFFFFF;
            box-shadow: 0 6px 16px rgba(0, 82, 255, 0.25);
        }

        .btn-primary:hover {
            box-shadow: 0 8px 22px rgba(0, 82, 255, 0.38);
            transform: translateY(-1px);
        }

        .btn-volt {
            background: #10B981;
            color: #FFFFFF;
            box-shadow: 0 6px 16px rgba(16, 185, 129, 0.3);
        }

        .btn-volt:hover {
            background: #059669;
            transform: translateY(-1px);
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            color: var(--text-heading);
        }

        /* 徽章 Badge */
        .data-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(0, 82, 255, 0.08);
            color: var(--brand-primary);
            padding: 5px 14px;
            border-radius: var(--radius-full);
            font-size: 0.8125rem;
            font-weight: 700;
            letter-spacing: 0.2px;
            width: fit-content;
        }

        .data-badge.volt {
            background: rgba(16, 185, 129, 0.12);
            color: #059669;
        }

        .data-badge.dark {
            background: rgba(255, 255, 255, 0.1);
            color: var(--brand-volt-glow);
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        .ping-dot {
            width: 8px;
            height: 8px;
            background-color: #10B981;
            border-radius: 50%;
            display: inline-block;
            box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.3);
            animation: pulse-ping 2s infinite;
        }

        @keyframes pulse-ping {
            0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
            70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
            100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
        }

        /* 通用板块规范 */
        section {
            padding: 84px 0;
            position: relative;
        }

        .section-header {
            text-align: center;
            max-width: 780px;
            margin: 0 auto 52px auto;
        }

        .section-header .data-badge {
            margin-bottom: 14px;
        }

        .section-title {
            font-size: 2.25rem;
            font-weight: 800;
            color: var(--text-heading);
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .section-desc {
            font-size: 1.0625rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .section-alt {
            background-color: #FFFFFF;
        }

        /* 板块一：Hero 首屏 */
        .hero-section {
            padding: 70px 0 90px 0;
            background: radial-gradient(circle at top right, rgba(0, 82, 255, 0.08), transparent 60%),
                        radial-gradient(circle at bottom left, rgba(0, 210, 255, 0.06), transparent 50%),
                        #FFFFFF;
            border-bottom: 1px solid var(--border-light);
            position: relative;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 48px;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 2.85rem;
            font-weight: 900;
            line-height: 1.18;
            color: var(--text-heading);
            margin: 18px 0;
            letter-spacing: -1px;
        }

        .hero-content h1 .gradient-text {
            background: var(--brand-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-lead {
            font-size: 1.125rem;
            color: var(--text-body);
            line-height: 1.8;
            margin-bottom: 30px;
        }

        .hero-cta-box {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 36px;
        }

        .hero-kpis {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }

        .hero-kpi-item {
            display: flex;
            flex-direction: column;
        }

        .hero-kpi-num {
            font-size: 1.625rem;
            font-weight: 800;
            color: var(--brand-primary);
        }

        .hero-kpi-label {
            font-size: 0.8125rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        .hero-visual-card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            padding: 16px;
            box-shadow: 0 20px 40px -15px rgba(0, 82, 255, 0.18);
            border: 1px solid var(--border-light);
            position: relative;
        }

        .hero-img-wrap {
            border-radius: var(--radius-md);
            overflow: hidden;
            position: relative;
            height: 380px;
        }

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

        .hero-floating-tag {
            position: absolute;
            bottom: 24px;
            left: 24px;
            right: 24px;
            background: rgba(15, 23, 42, 0.88);
            backdrop-filter: blur(8px);
            padding: 16px 20px;
            border-radius: var(--radius-md);
            color: #FFFFFF;
            display: flex;
            align-items: center;
            justify-content: space-between;
            border: 1px solid rgba(255, 255, 255, 0.12);
        }

        .hero-floating-info {
            display: flex;
            flex-direction: column;
        }

        .hero-floating-title {
            font-size: 0.9375rem;
            font-weight: 700;
        }

        .hero-floating-sub {
            font-size: 0.75rem;
            color: #94A3B8;
        }

        /* 板块二：品牌架构与技术解构 */
        .brand-intro-card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            padding: 44px;
            box-shadow: var(--shadow-card);
            display: grid;
            grid-template-columns: 1fr 1.1fr;
            gap: 44px;
            align-items: center;
        }

        .intro-media {
            border-radius: var(--radius-md);
            overflow: hidden;
            height: 420px;
            position: relative;
            border: 1px solid var(--border-light);
        }

        .intro-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .intro-layers {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .layer-box {
            background: var(--bg-light);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 18px 22px;
            transition: var(--transition-smooth);
        }

        .layer-box:hover {
            border-color: var(--brand-primary);
            background: #FFFFFF;
            box-shadow: 0 4px 14px rgba(0, 82, 255, 0.08);
            transform: translateX(4px);
        }

        .layer-head {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 6px;
        }

        .layer-name {
            font-size: 1.0625rem;
            font-weight: 700;
            color: var(--text-heading);
        }

        .layer-tag {
            font-size: 0.75rem;
            padding: 2px 8px;
            border-radius: 4px;
            background: rgba(0, 82, 255, 0.1);
            color: var(--brand-primary);
            font-weight: 600;
        }

        .layer-desc {
            font-size: 0.875rem;
            color: var(--text-body);
            line-height: 1.6;
        }

        /* 板块三：核心优势六宫格 */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .feature-card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            padding: 32px 28px;
            box-shadow: var(--shadow-card);
            transition: var(--transition-smooth);
            display: flex;
            flex-direction: column;
            position: relative;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(0, 82, 255, 0.4);
        }

        .feature-icon-wrap {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            background: rgba(0, 82, 255, 0.08);
            color: var(--brand-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }

        .feature-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 12px;
        }

        .feature-desc {
            font-size: 0.9375rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 18px;
            flex-grow: 1;
        }

        .feature-spec {
            font-size: 0.8125rem;
            font-weight: 600;
            color: var(--brand-primary);
            padding-top: 14px;
            border-top: 1px dashed var(--border-light);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* 板块四：热门产品与方案 */
        .products-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .product-card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
            transition: var(--transition-smooth);
        }

        .product-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(0, 82, 255, 0.3);
        }

        .product-thumb {
            height: 220px;
            position: relative;
            overflow: hidden;
        }

        .product-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .product-body {
            padding: 28px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }

        .product-name {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--text-heading);
            margin-bottom: 10px;
        }

        .product-desc {
            font-size: 0.9375rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 20px;
        }

        .product-spec-list {
            list-style: none;
            margin-bottom: 24px;
            flex-grow: 1;
        }

        .product-spec-list li {
            font-size: 0.875rem;
            color: var(--text-body);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .product-spec-list li svg {
            color: var(--brand-volt);
            flex-shrink: 0;
        }

        /* 板块五：沉浸式深色数字化场景看板 */
        .section-dark {
            background-color: var(--bg-dark);
            color: #F8FAFC;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .section-dark .section-title {
            color: #FFFFFF;
        }

        .section-dark .section-desc {
            color: #94A3B8;
        }

        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .scenario-item {
            background: var(--bg-dark-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-dark);
            padding: 30px;
            display: flex;
            flex-direction: column;
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .scenario-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--brand-gradient);
            opacity: 0;
            transition: var(--transition-smooth);
        }

        .scenario-item:hover {
            border-color: rgba(0, 210, 255, 0.35);
            transform: translateY(-5px);
        }

        .scenario-item:hover::before {
            opacity: 1;
        }

        .scenario-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 18px;
        }

        .scenario-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 12px;
        }

        .scenario-desc {
            font-size: 0.9375rem;
            color: #94A3B8;
            line-height: 1.65;
            margin-bottom: 20px;
        }

        .scenario-highlight {
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            font-size: 0.8125rem;
            color: var(--brand-volt-glow);
            border-left: 3px solid var(--brand-volt);
        }

        /* 板块六：行业实践与标杆案例 */
        .stories-container {
            display: flex;
            flex-direction: column;
            gap: 40px;
        }

        .story-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 44px;
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            padding: 36px;
            box-shadow: var(--shadow-card);
            align-items: center;
        }

        .story-row.reversed {
            direction: rtl;
        }

        .story-row.reversed > * {
            direction: ltr;
        }

        .story-visual {
            height: 340px;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
        }

        .story-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .story-content {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .story-label {
            font-size: 0.875rem;
            font-weight: 700;
            color: var(--brand-primary);
        }

        .story-title {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-heading);
            line-height: 1.35;
        }

        .story-body {
            font-size: 0.9375rem;
            color: var(--text-body);
            line-height: 1.7;
        }

        .story-metrics-strip {
            display: flex;
            gap: 20px;
            margin-top: 10px;
            padding-top: 16px;
            border-top: 1px solid var(--border-light);
        }

        .story-metric {
            display: flex;
            flex-direction: column;
        }

        .story-metric-val {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--brand-volt);
        }

        .story-metric-lab {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* 板块七：关键运行数据网格 */
        .metrics-banner {
            background: linear-gradient(135deg, #0A0F1D 0%, #172554 100%);
            border-radius: var(--radius-lg);
            padding: 50px 40px;
            color: #FFFFFF;
            box-shadow: 0 20px 40px -10px rgba(0, 82, 255, 0.25);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }

        .metric-card-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
        }

        .metric-big-num {
            font-size: 3rem;
            font-weight: 900;
            line-height: 1;
            letter-spacing: -1px;
            background: linear-gradient(135deg, #FFFFFF 0%, #93C5FD 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .metric-title {
            font-size: 1.0625rem;
            font-weight: 700;
            color: #E2E8F0;
        }

        .metric-sub {
            font-size: 0.8125rem;
            color: #94A3B8;
        }

        /* 板块八：口碑认同评价 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .review-card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            padding: 32px 28px;
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
            transition: var(--transition-smooth);
        }

        .review-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .stars-row {
            color: #F59E0B;
            margin-bottom: 16px;
            display: flex;
            gap: 4px;
        }

        .review-text {
            font-size: 0.9375rem;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 24px;
            flex-grow: 1;
            font-style: italic;
        }

        .reviewer-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            padding-top: 16px;
            border-top: 1px solid var(--border-light);
        }

        .reviewer-avatar-placeholder {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(0, 82, 255, 0.1);
            color: var(--brand-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9375rem;
            flex-shrink: 0;
        }

        .reviewer-info {
            display: flex;
            flex-direction: column;
        }

        .reviewer-name {
            font-size: 0.9375rem;
            font-weight: 700;
            color: var(--text-heading);
        }

        .reviewer-role {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* 板块九：传统对比差异矩阵 */
        .comparison-wrapper {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }

        .comparison-table th, .comparison-table td {
            padding: 18px 24px;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.9375rem;
        }

        .comparison-table th {
            background: #F8FAFC;
            color: var(--text-heading);
            font-weight: 700;
        }

        .col-highlight {
            background: rgba(0, 82, 255, 0.03);
            color: var(--brand-primary);
            font-weight: 600;
        }

        .col-muted {
            color: var(--text-muted);
        }

        /* 板块十：前沿资讯与证据库 */
        .news-layout {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 32px;
        }

        .news-featured-card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }

        .featured-img-wrap {
            height: 280px;
            overflow: hidden;
        }

        .featured-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .featured-body {
            padding: 30px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .news-list-group {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .news-list-item {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            padding: 20px 24px;
            transition: var(--transition-smooth);
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .news-list-item:hover {
            border-color: var(--brand-primary);
            box-shadow: 0 4px 16px rgba(0, 82, 255, 0.08);
            transform: translateX(4px);
        }

        .news-item-date {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        .news-item-title {
            font-size: 1.0625rem;
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.4;
        }

        .news-item-snippet {
            font-size: 0.875rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 板块十一：FAQ 手风琴 */
        .faq-accordion {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition-smooth);
        }

        .faq-question {
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-size: 1.0625rem;
            font-weight: 700;
            color: var(--text-heading);
            user-select: none;
        }

        .faq-icon-arrow {
            transition: transform 0.28s ease;
            color: var(--brand-primary);
        }

        .faq-item.active .faq-icon-arrow {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            padding: 0 24px;
            font-size: 0.9375rem;
            color: var(--text-body);
            line-height: 1.7;
            background: var(--bg-light);
        }

        .faq-item.active .faq-answer {
            max-height: 250px;
            padding: 16px 24px 22px 24px;
            border-top: 1px solid var(--border-light);
        }

        /* 板块十二：保障条与合规 */
        .guarantees-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .guarantee-box {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
            transition: var(--transition-smooth);
        }

        .guarantee-box:hover {
            border-color: var(--brand-volt);
            transform: translateY(-3px);
        }

        .guarantee-icon {
            color: var(--brand-volt);
            display: flex;
            align-items: center;
        }

        .guarantee-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-heading);
        }

        .guarantee-desc {
            font-size: 0.8125rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 板块十三：全幅促单与方案预约中心 */
        .cta-container {
            background: linear-gradient(135deg, #0A0F1D 0%, #002266 100%);
            border-radius: var(--radius-lg);
            padding: 60px 48px;
            color: #FFFFFF;
            box-shadow: 0 24px 48px -12px rgba(0, 82, 255, 0.35);
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 50px;
            align-items: center;
            border: 1px solid rgba(255, 255, 255, 0.12);
        }

        .cta-info h2 {
            font-size: 2.25rem;
            font-weight: 900;
            line-height: 1.25;
            margin-bottom: 18px;
        }

        .cta-info p {
            font-size: 1.0625rem;
            color: #CBD5E1;
            line-height: 1.7;
            margin-bottom: 28px;
        }

        .cta-badges-line {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .cta-form-box {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 32px;
            color: var(--text-heading);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
        }

        .form-row {
            margin-bottom: 18px;
        }

        .form-label {
            display: block;
            font-size: 0.875rem;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text-heading);
        }

        .form-input, .form-select {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid #CBD5E1;
            border-radius: var(--radius-sm);
            font-size: 0.9375rem;
            outline: none;
            transition: var(--transition-smooth);
        }

        .form-input:focus, .form-select:focus {
            border-color: var(--brand-primary);
            box-shadow: 0 0 0 3px rgba(0, 82, 255, 0.12);
        }

        .form-footnote {
            font-size: 0.75rem;
            color: var(--text-muted);
            text-align: center;
            margin-top: 12px;
        }

        /* 底部固定转化浮动条 */
        .bottom-sticky-bar {
            position: fixed;
            bottom: 20px;
            left: 50%;
            transform: translateX(-50%) translateY(120%);
            width: 90%;
            max-width: 960px;
            background: rgba(15, 23, 42, 0.92);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: var(--radius-full);
            padding: 10px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 16px 36px rgba(0, 0, 0, 0.3);
            z-index: 999;
            transition: transform 0.35s ease;
        }

        .bottom-sticky-bar.visible {
            transform: translateX(-50%) translateY(0);
        }

        .sticky-left {
            display: flex;
            align-items: center;
            gap: 16px;
            color: #FFFFFF;
            font-size: 0.875rem;
        }

        .sticky-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        /* 页脚规范 */
        .site-footer {
            background: #0A0F1D;
            color: #94A3B8;
            padding: 70px 0 30px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.875rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 50px;
        }

        .footer-logo {
            font-size: 1.25rem;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-desc {
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .footer-title {
            font-size: 1rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 18px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

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

        .footer-contact p {
            margin-bottom: 10px;
            line-height: 1.6;
        }

        .footer-bottom {
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            text-align: center;
            font-size: 0.8125rem;
            color: #64748B;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        /* 移动端抽屉菜单与响应式 */
        @media (max-width: 1024px) {
            .hero-grid, .brand-intro-card, .cta-container, .news-layout {
                grid-template-columns: 1fr;
            }
            .features-grid, .products-grid, .scenarios-grid, .reviews-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .guarantees-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            section {
                padding: 60px 0;
            }
            .section-title {
                font-size: 1.85rem;
            }
            .hero-content h1 {
                font-size: 2.15rem;
            }
            .nav-menu, .nav-cta-group, .top-utility-bar {
                display: none;
            }
            .menu-toggle {
                display: block;
            }
            .features-grid, .products-grid, .scenarios-grid, .reviews-grid, .guarantees-grid {
                grid-template-columns: 1fr;
            }
            .story-row {
                grid-template-columns: 1fr;
            }
            .metrics-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .bottom-sticky-bar {
                display: none;
            }
            .cta-container {
                padding: 36px 24px;
            }
        }

        /* 移动端菜单抽屉 */
        .mobile-drawer {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: #FFFFFF;
            z-index: 2000;
            display: flex;
            flex-direction: column;
            padding: 24px;
            transform: translateX(100%);
            transition: transform 0.3s ease;
        }

        .mobile-drawer.open {
            transform: translateX(0);
        }

        .drawer-head {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 30px;
        }

        .drawer-nav {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 20px;
            font-size: 1.125rem;
            font-weight: 700;
        }