/* roulang page: index */
:root {
            --primary: #0066FF;
            --primary-dark: #0052CC;
            --accent: #00D2A0;
            --bg-light: #F8FAFC;
            --bg-white: #FFFFFF;
            --bg-dark: #0B111E;
            --bg-dark-card: #162032;
            --text-main: #0F172A;
            --text-muted: #475569;
            --text-sub: #94A3B8;
            --border-light: #E2E8F0;
            --border-dark: #1E293B;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
            --shadow-hover: 0 12px 30px -4px rgba(0, 102, 255, 0.14);
            --max-w: 1280px;
        }

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

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

        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: var(--bg-light);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button, input, select, textarea {
            font: inherit;
        }

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

        /* 顶部双行导航 */
        .top-bar {
            background-color: #0F172A;
            color: #94A3B8;
            font-size: 0.8125rem;
            padding: 8px 0;
            border-bottom: 1px solid #1E293B;
        }
        .top-bar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .top-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent);
        }
        .top-badge::before {
            content: "";
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
            box-shadow: 0 0 8px var(--accent);
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
        }
        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: -0.5px;
        }
        .logo-icon {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
            font-size: 18px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .header-cta-btn {
            background: var(--primary);
            color: white !important;
            padding: 10px 20px;
            border-radius: 8px;
            font-size: 0.875rem;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(0, 102, 255, 0.3);
        }
        .header-cta-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
        }

        /* 通用板块样式 */
        .section {
            padding: 88px 0;
            position: relative;
        }
        .section-white {
            background-color: var(--bg-white);
        }
        .section-light {
            background-color: var(--bg-light);
        }
        .section-dark {
            background-color: var(--bg-dark);
            color: #FFFFFF;
        }
        .section-header {
            text-align: center;
            max-width: 780px;
            margin: 0 auto 56px;
        }
        .section-tag {
            display: inline-block;
            font-size: 0.8125rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--primary);
            background: rgba(0, 102, 255, 0.08);
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 14px;
        }
        .section-dark .section-tag {
            color: var(--accent);
            background: rgba(0, 210, 160, 0.12);
        }
        .section-title {
            font-size: 2.125rem;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 16px;
            color: var(--text-main);
        }
        .section-dark .section-title {
            color: #FFFFFF;
        }
        .section-desc {
            font-size: 1rem;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .section-dark .section-desc {
            color: #94A3B8;
        }

        /* Hero 叙事对比区 */
        .hero-section {
            position: relative;
            background: #0B111E url('/assets/images/7c38b0e3debbc56c.webp') center/cover no-repeat;
            padding: 96px 0 80px;
            color: white;
            overflow: hidden;
        }
        .hero-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 17, 30, 0.88) 0%, rgba(11, 17, 30, 0.96) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 0.875rem;
            color: #E2E8F0;
            margin-bottom: 24px;
        }
        .hero-title {
            font-size: 3.25rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero-subtitle {
            font-size: 1.125rem;
            color: #CBD5E1;
            max-width: 820px;
            margin-bottom: 40px;
            line-height: 1.8;
        }
        .hero-compare-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin-bottom: 48px;
        }
        .compare-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            padding: 28px;
            backdrop-filter: blur(8px);
        }
        .compare-card.active-card {
            border-color: var(--primary);
            background: rgba(0, 102, 255, 0.08);
            box-shadow: 0 0 30px rgba(0, 102, 255, 0.2);
        }
        .compare-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 16px;
        }
        .compare-label {
            font-size: 0.875rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .compare-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
            font-size: 0.95rem;
            color: #CBD5E1;
        }
        .compare-list li {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .btn-primary {
            background: var(--primary);
            color: white;
            padding: 14px 32px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 1rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 20px rgba(0, 102, 255, 0.4);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }
        .btn-secondary {
            background: rgba(255, 255, 255, 0.1);
            color: white;
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 14px 28px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 1rem;
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.18);
        }

        /* 痛点与平台矩阵 */
        .pain-solution-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .pain-box {
            background: #FFF1F2;
            border: 1px solid #FECDD3;
            border-radius: var(--radius-lg);
            padding: 32px;
        }
        .pain-item {
            margin-bottom: 20px;
            padding-bottom: 20px;
            border-bottom: 1px dashed #FDA4AF;
        }
        .pain-item:last-child {
            margin-bottom: 0;
            padding-bottom: 0;
            border-bottom: none;
        }
        .pain-item h4 {
            color: #9F1239;
            font-size: 1.1rem;
            margin-bottom: 6px;
        }
        .pain-item p {
            color: #881337;
            font-size: 0.9rem;
        }
        .solution-box {
            background: #F0FDF4;
            border: 1px solid #BBF7D0;
            border-radius: var(--radius-lg);
            padding: 32px;
        }
        .solution-item {
            margin-bottom: 20px;
            padding-bottom: 20px;
            border-bottom: 1px dashed #86EFAC;
        }
        .solution-item:last-child {
            margin-bottom: 0;
            padding-bottom: 0;
            border-bottom: none;
        }
        .solution-item h4 {
            color: #166534;
            font-size: 1.1rem;
            margin-bottom: 6px;
        }
        .solution-item p {
            color: #14532D;
            font-size: 0.9rem;
        }

        /* 核心优势网格 */
        .strengths-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .strength-card {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 32px;
            transition: all 0.3s ease;
        }
        .strength-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .strength-icon {
            width: 48px;
            height: 48px;
            background: rgba(0, 102, 255, 0.08);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.25rem;
            margin-bottom: 20px;
        }
        .strength-card h3 {
            font-size: 1.25rem;
            margin-bottom: 12px;
        }
        .strength-card p {
            color: var(--text-muted);
            font-size: 0.9375rem;
            line-height: 1.6;
        }

        /* 流程步骤 */
        .workflow-timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .workflow-card {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            position: relative;
        }
        .workflow-step-num {
            font-size: 2.5rem;
            font-weight: 800;
            color: #E2E8F0;
            line-height: 1;
            margin-bottom: 12px;
            font-family: "DIN Alternate", sans-serif;
        }
        .workflow-card h4 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .workflow-card p {
            font-size: 0.875rem;
            color: var(--text-muted);
        }

        /* 3大热门产品矩阵 */
        .products-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .product-card {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-sm);
        }
        .product-img-wrap {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .product-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .product-card:hover .product-img-wrap img {
            transform: scale(1.05);
        }
        .product-body {
            padding: 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .product-title {
            font-size: 1.35rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .product-desc {
            font-size: 0.9375rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            line-height: 1.6;
        }
        .product-features {
            list-style: none;
            margin-bottom: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .product-features li {
            font-size: 0.875rem;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .product-btn {
            display: block;
            text-align: center;
            padding: 10px 0;
            border: 1px solid var(--primary);
            color: var(--primary);
            border-radius: 6px;
            font-weight: 600;
            font-size: 0.9rem;
        }
        .product-btn:hover {
            background: var(--primary);
            color: white;
        }

        /* 深色沉浸案例 */
        .case-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .case-info h3 {
            font-size: 1.85rem;
            margin-bottom: 16px;
            line-height: 1.4;
        }
        .case-info p {
            color: #CBD5E1;
            font-size: 1rem;
            margin-bottom: 24px;
            line-height: 1.7;
        }
        .case-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-bottom: 32px;
        }
        .case-stat-item {
            background: rgba(255, 255, 255, 0.05);
            padding: 16px;
            border-radius: 8px;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .case-stat-val {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--accent);
            font-family: "DIN Alternate", sans-serif;
        }
        .case-stat-lbl {
            font-size: 0.8125rem;
            color: #94A3B8;
        }
        .case-image-box {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.15);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
        }

        /* 关键数据条 */
        .metrics-bar {
            background: linear-gradient(135deg, #0052CC 0%, #0066FF 100%);
            color: white;
            padding: 60px 0;
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .metric-num {
            font-size: 3rem;
            font-weight: 800;
            font-family: "DIN Alternate", sans-serif;
            margin-bottom: 6px;
            letter-spacing: -1px;
        }
        .metric-label {
            font-size: 0.95rem;
            color: #E2E8F0;
        }

        /* 用户故事与场景 */
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .scenario-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 32px;
            border: 1px solid var(--border-light);
        }
        .scenario-card h4 {
            font-size: 1.25rem;
            margin-bottom: 12px;
        }
        .scenario-card p {
            color: var(--text-muted);
            font-size: 0.9375rem;
            line-height: 1.6;
        }

        /* 客户证言 */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .testimonial-card {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-sm);
        }
        .testimonial-quote {
            font-size: 0.95rem;
            color: var(--text-main);
            margin-bottom: 24px;
            line-height: 1.7;
            font-style: italic;
        }
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .author-avatar {
            width: 44px;
            height: 44px;
            background: #E2E8F0;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--primary);
        }
        .author-name {
            font-size: 0.95rem;
            font-weight: 700;
        }
        .author-title {
            font-size: 0.8125rem;
            color: var(--text-sub);
        }

        /* 动态资讯 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .news-card {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
        }
        .news-card-img {
            height: 180px;
            overflow: hidden;
        }
        .news-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-card-body {
            padding: 24px;
        }
        .news-date {
            font-size: 0.8125rem;
            color: var(--text-sub);
            margin-bottom: 8px;
        }
        .news-card-body h4 {
            font-size: 1.15rem;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .news-card-body p {
            font-size: 0.875rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* FAQ 手风琴 */
        .faq-accordion {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
        }
        .faq-question {
            padding: 20px 24px;
            font-size: 1.05rem;
            font-weight: 600;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            user-select: none;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            font-size: 1.25rem;
            transition: transform 0.3s ease;
        }
        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            background: #F8FAFC;
        }
        .faq-answer-inner {
            padding: 0 24px 20px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* 转化预约板块 */
        .cta-banner {
            background: linear-gradient(135deg, #0B111E 0%, #162032 100%);
            border-radius: 20px;
            padding: 60px 48px;
            color: white;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .cta-form {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            padding: 32px;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-size: 0.875rem;
            margin-bottom: 6px;
            color: #CBD5E1;
        }
        .form-control {
            width: 100%;
            padding: 12px 14px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 6px;
            color: white;
            font-size: 0.95rem;
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            background: rgba(255, 255, 255, 0.12);
        }
        .form-submit-btn {
            width: 100%;
            background: var(--primary);
            color: white;
            border: none;
            padding: 14px;
            border-radius: 6px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            margin-top: 8px;
        }
        .form-submit-btn:hover {
            background: var(--primary-dark);
        }

        /* 页脚 */
        .site-footer {
            background: #070B13;
            color: #64748B;
            padding: 64px 0 32px;
            border-top: 1px solid #1E293B;
            font-size: 0.875rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 48px;
        }
        .footer-col h5 {
            color: #F1F5F9;
            font-size: 1rem;
            margin-bottom: 16px;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            padding-top: 32px;
            border-top: 1px solid #1E293B;
            text-align: center;
            font-size: 0.8125rem;
        }

        /* 移动端响应式 */
        @media (max-width: 1024px) {
            .hero-title { font-size: 2.5rem; }
            .strengths-grid, .workflow-timeline, .products-grid, .scenarios-grid, .testimonial-grid, .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .case-grid, .cta-banner, .pain-solution-grid {
                grid-template-columns: 1fr;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .top-bar { display: none; }
            .main-nav { display: none; }
            .hero-title { font-size: 2rem; }
            .hero-compare-grid { grid-template-columns: 1fr; }
            .strengths-grid, .workflow-timeline, .products-grid, .scenarios-grid, .testimonial-grid, .news-grid {
                grid-template-columns: 1fr;
            }
            .metrics-grid { grid-template-columns: 1fr; gap: 32px; }
            .section { padding: 60px 0; }
            .cta-banner { padding: 36px 20px; }
            .footer-grid { grid-template-columns: 1fr; }
        }