/* roulang page: index */
:root {
            --primary: #0A4DA6;
            --primary-hover: #083c82;
            --primary-light: #e8f1fc;
            --secondary: #00A884;
            --secondary-hover: #008f70;
            --bg-main: #F8FAFC;
            --bg-white: #FFFFFF;
            --bg-navy: #0A192F;
            --text-title: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(10, 77, 166, 0.06), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 20px 25px -5px rgba(10, 77, 166, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
            --radius-md: 8px;
            --radius-lg: 12px;
            --max-w: 1240px;
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            background-color: var(--bg-main);
            color: var(--text-body);
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.25s ease;
        }

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

        button, input {
            font-family: inherit;
        }

        .container {
            max-width: var(--max-w);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 顶部通栏信息 */
        .top-bar {
            background-color: #f1f5f9;
            border-bottom: 1px solid var(--border-color);
            font-size: 13px;
            color: var(--text-muted);
            padding: 8px 0;
        }
        .top-bar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .top-contact-list {
            display: flex;
            gap: 20px;
        }

        /* 主导航 */
        .header-sticky {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
        }
        .nav-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
        }
        .brand-logo {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.5px;
        }
        .brand-logo svg {
            width: 28px;
            height: 28px;
            fill: var(--primary);
        }
        .nav-menu {
            display: flex;
            list-style: none;
            gap: 28px;
            align-items: center;
        }
        .nav-link {
            font-weight: 500;
            font-size: 15px;
            color: var(--text-title);
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .btn-cta {
            background-color: var(--primary);
            color: #fff;
            padding: 10px 22px;
            border-radius: 6px;
            font-weight: 600;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            border: 1px solid var(--primary);
            cursor: pointer;
            transition: all 0.25s ease;
        }
        .btn-cta:hover {
            background-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-outline {
            background-color: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
            padding: 10px 22px;
            border-radius: 6px;
            font-weight: 600;
            font-size: 14px;
            cursor: pointer;
            transition: all 0.25s ease;
        }
        .btn-outline:hover {
            background-color: var(--primary);
            color: #fff;
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }

        /* 板块公用 */
        .section {
            padding: 92px 0;
            position: relative;
        }
        .section-alt {
            background-color: #fff;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .section-header {
            margin-bottom: 56px;
            max-width: 760px;
        }
        .badge {
            display: inline-block;
            background-color: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 4px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }
        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-title);
            line-height: 1.3;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 1. Hero 蓝图：路线图预告与版本节点条 */
        .hero-section {
            padding: 80px 0 60px;
            background: linear-gradient(180deg, #F0F6FF 0%, #F8FAFC 100%);
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border-color);
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 48px;
            align-items: center;
        }
        .hero-h1 {
            font-size: 44px;
            font-weight: 800;
            color: var(--text-title);
            line-height: 1.25;
            margin-bottom: 20px;
        }
        .hero-p {
            font-size: 17px;
            color: var(--text-body);
            margin-bottom: 32px;
            line-height: 1.75;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            margin-bottom: 36px;
            flex-wrap: wrap;
        }
        .hero-panel {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-lg);
            position: relative;
        }
        .roadmap-bar {
            margin-top: 36px;
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            box-shadow: var(--shadow-sm);
        }
        .roadmap-item {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
        }
        .roadmap-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: var(--secondary);
            box-shadow: 0 0 0 4px rgba(0, 168, 132, 0.2);
        }
        .roadmap-item strong {
            color: var(--text-title);
        }

        /* 2. 左资讯流 + 右热榜/入口 */
        .dual-stream-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr;
            gap: 36px;
        }
        .feed-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            margin-bottom: 20px;
            transition: all 0.25s ease;
            display: flex;
            gap: 20px;
        }
        .feed-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            border-color: #cbd5e1;
        }
        .feed-img-box {
            width: 180px;
            height: 120px;
            border-radius: 6px;
            overflow: hidden;
            flex-shrink: 0;
            background-color: #e2e8f0;
        }
        .feed-img-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .feed-content h3 {
            font-size: 18px;
            color: var(--text-title);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .feed-content p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .feed-meta {
            font-size: 12px;
            color: #94a3b8;
            display: flex;
            gap: 16px;
        }
        .hot-rank-panel {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px;
            position: sticky;
            top: 96px;
        }
        .rank-item {
            display: flex;
            gap: 14px;
            padding: 14px 0;
            border-bottom: 1px dashed var(--border-color);
        }
        .rank-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }
        .rank-num {
            font-size: 18px;
            font-weight: 800;
            color: var(--primary);
            width: 24px;
        }
        .rank-text h4 {
            font-size: 15px;
            color: var(--text-title);
            margin-bottom: 4px;
        }
        .rank-text p {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 3. 核心优势六宫格 */
        .grid-3x2 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .grid-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            transition: all 0.25s ease;
        }
        .grid-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }
        .card-icon {
            width: 48px;
            height: 48px;
            background-color: var(--primary-light);
            color: var(--primary);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }
        .card-icon svg {
            width: 24px;
            height: 24px;
        }
        .grid-card h3 {
            font-size: 19px;
            color: var(--text-title);
            margin-bottom: 12px;
        }
        .grid-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 4. 专题条与能力矩阵 */
        .feature-bar-wrap {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .feature-box {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            border-left: 4px solid var(--primary);
        }
        .feature-box h4 {
            font-size: 16px;
            color: var(--text-title);
            margin-bottom: 8px;
        }
        .feature-box p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* 5. 热门产品三矩阵 */
        .product-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .product-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            transition: all 0.25s ease;
        }
        .product-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: #cbd5e1;
        }
        .product-media {
            height: 200px;
            background-color: #cbd5e1;
            position: relative;
        }
        .product-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .product-body {
            padding: 28px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        .product-body h3 {
            font-size: 20px;
            color: var(--text-title);
            margin-bottom: 12px;
        }
        .product-body p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
            line-height: 1.6;
        }
        .product-spec-list {
            list-style: none;
            margin-bottom: 24px;
            border-top: 1px solid #f1f5f9;
            padding-top: 16px;
        }
        .product-spec-list li {
            font-size: 13px;
            color: var(--text-body);
            padding: 6px 0;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .product-spec-list li::before {
            content: "✓";
            color: var(--secondary);
            font-weight: bold;
        }

        /* 6. 深色对比案例与科研理念 */
        .navy-section {
            background-color: var(--bg-navy);
            color: #fff;
            padding: 100px 0;
        }
        .navy-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }
        .navy-content h2 {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 20px;
            color: #ffffff;
        }
        .navy-content p {
            font-size: 16px;
            color: #94a3b8;
            line-height: 1.8;
            margin-bottom: 28px;
        }
        .tech-spec-bar {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
        }
        .spec-item strong {
            display: block;
            font-size: 22px;
            color: var(--secondary);
            font-weight: 700;
        }
        .spec-item span {
            font-size: 13px;
            color: #cbd5e1;
        }
        .navy-board {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-lg);
            padding: 24px;
        }

        /* 7. 行业场景与用户故事穿插 */
        .story-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            margin-bottom: 64px;
        }
        .story-row:last-child {
            margin-bottom: 0;
        }
        .story-row.reverse {
            direction: rtl;
        }
        .story-row.reverse > * {
            direction: ltr;
        }
        .story-media {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            height: 320px;
        }
        .story-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .story-text h3 {
            font-size: 24px;
            color: var(--text-title);
            margin-bottom: 16px;
        }
        .story-text p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        /* 8. 关键数据指标统计条 */
        .metrics-banner {
            background-color: var(--primary);
            color: #fff;
            padding: 48px 0;
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            text-align: center;
        }
        .metric-col {
            border-right: 1px solid rgba(255, 255, 255, 0.15);
            padding: 0 16px;
        }
        .metric-col:last-child {
            border-right: none;
        }
        .metric-value {
            font-size: 40px;
            font-weight: 800;
            line-height: 1;
            margin-bottom: 8px;
            color: #fff;
        }
        .metric-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.8);
        }

        /* 9. 客户见证与真实评价 */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .testi-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            position: relative;
        }
        .quote-icon {
            font-size: 36px;
            line-height: 1;
            color: #cbd5e1;
            margin-bottom: 16px;
            font-family: Georgia, serif;
        }
        .testi-card p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 24px;
        }
        .testi-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .testi-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background-color: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--primary);
            font-size: 14px;
        }
        .testi-info h4 {
            font-size: 15px;
            color: var(--text-title);
        }
        .testi-info span {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 10. FAQ 原生手风琴 */
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            overflow: hidden;
        }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-title);
            user-select: none;
            background: #fff;
            border: none;
            width: 100%;
            text-align: left;
        }
        .faq-question svg {
            width: 18px;
            height: 18px;
            transition: transform 0.3s ease;
            fill: var(--text-muted);
        }
        .faq-question[aria-expanded="true"] svg {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            background: #fafcff;
        }
        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
        }

        /* 11. 权威保障与合规条 */
        .guarantee-bar {
            background-color: #f1f5f9;
            padding: 36px 0;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .guarantee-flex {
            display: flex;
            justify-content: space-around;
            align-items: center;
            flex-wrap: wrap;
            gap: 24px;
        }
        .guarantee-item {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-title);
        }
        .guarantee-item svg {
            width: 24px;
            height: 24px;
            fill: var(--primary);
        }

        /* 12. 底部高转化咨询表单 */
        .contact-box {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 48px;
            box-shadow: var(--shadow-lg);
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 48px;
        }
        .contact-info-panel h3 {
            font-size: 26px;
            color: var(--text-title);
            margin-bottom: 16px;
        }
        .contact-info-panel p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 32px;
        }
        .contact-details {
            list-style: none;
        }
        .contact-details li {
            margin-bottom: 16px;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--text-body);
        }
        .contact-form {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-size: 14px;
            outline: none;
            transition: border-color 0.2s ease;
        }
        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(10, 77, 166, 0.1);
        }

        /* 页脚 */
        .site-footer {
            background-color: #0b1320;
            color: #94a3b8;
            padding: 64px 0 32px;
            font-size: 14px;
            border-top: 1px solid #1e293b;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 48px;
        }
        .footer-col h4 {
            font-size: 15px;
            color: #fff;
            margin-bottom: 20px;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a:hover {
            color: #fff;
        }
        .footer-bottom {
            padding-top: 32px;
            border-top: 1px solid #1e293b;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
        }

        /* 移动端浮动转化条 */
        .floating-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: #fff;
            border-top: 1px solid var(--border-color);
            padding: 12px 20px;
            box-shadow: 0 -4px 10px rgba(0, 0, 0, 0.08);
            z-index: 99;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transform: translateY(120%);
            transition: transform 0.3s ease;
        }
        .floating-cta-bar.show {
            transform: translateY(0);
        }

        /* 响应式断点 */
        @media (max-width: 1024px) {
            .grid-3x2, .product-grid, .testimonial-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-bar-wrap {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-grid, .navy-grid, .dual-stream-grid, .contact-box {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .hot-rank-panel {
                position: static;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .top-bar {
                display: none;
            }
            .nav-menu {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 24px;
                box-shadow: var(--shadow-lg);
                display: none;
                gap: 16px;
            }
            .nav-menu.active {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            .hero-h1 {
                font-size: 30px;
            }
            .hero-p {
                font-size: 15px;
            }
            .grid-3x2, .product-grid, .testimonial-grid, .feature-bar-wrap {
                grid-template-columns: 1fr;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .metric-col {
                border-right: none;
            }
            .story-row, .story-row.reverse {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .feed-card {
                flex-direction: column;
            }
            .feed-img-box {
                width: 100%;
                height: 180px;
            }
            .form-row {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
            .roadmap-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
        }