/* roulang page: index */
:root {
            --brand-dark: #0A2540;
            --brand-primary: #0066FF;
            --brand-accent: #00D2A0;
            --bg-light: #F8FAFC;
            --bg-surface: #FFFFFF;
            --bg-deep: #0B132B;
            --bg-card-dark: #1C2541;
            --text-heading: #0F172A;
            --text-body: #475569;
            --text-muted: #94A3B8;
            --border-light: rgba(0, 102, 255, 0.08);
            --border-active: rgba(0, 210, 160, 0.4);
            --gradient-accent: linear-gradient(135deg, #0066FF 0%, #00D2A0 100%);
            --gradient-dark: linear-gradient(180deg, #0B132B 0%, #1C2541 100%);
            --shadow-card: 0 10px 30px -10px rgba(0, 102, 255, 0.06);
            --shadow-hover: 0 20px 40px -15px rgba(0, 102, 255, 0.15);
            --radius-card: 20px;
            --radius-btn: 12px;
            --radius-pill: 9999px;
            --container-max: 1240px;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            -webkit-tap-highlight-color: transparent;
        }

        html {
            scroll-behavior: smooth;
            font-family: 'Inter', 'Noto Sans SC', sans-serif;
            background-color: var(--bg-light);
            color: var(--text-body);
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
            background-color: var(--bg-light);
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }

        ul {
            list-style: none;
        }

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

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

        /* 顶部通栏 */
        .topbar {
            background-color: #06152B;
            color: #94A3B8;
            font-size: 13px;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .topbar-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .topbar-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--brand-accent);
        }
        .topbar-dot {
            width: 8px;
            height: 8px;
            background: var(--brand-accent);
            border-radius: 50%;
            box-shadow: 0 0 8px var(--brand-accent);
        }

        /* 主导航 */
        .header-sticky {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
            transition: all 0.3s ease;
        }
        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 80px;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 20px;
            font-weight: 800;
            color: var(--brand-dark);
            letter-spacing: -0.5px;
        }
        .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--gradient-accent);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-link {
            font-weight: 500;
            color: var(--text-body);
            font-size: 15px;
            position: relative;
            padding: 8px 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(--gradient-accent);
            transition: width 0.3s ease;
        }
        .nav-link:hover::after, .nav-link.active::after {
            width: 100%;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        /* 按钮体系 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            cursor: pointer;
            border: none;
            transition: all 0.3s ease;
        }
        .btn-gradient {
            background: var(--gradient-accent);
            color: #ffffff;
            box-shadow: 0 8px 20px rgba(0, 102, 255, 0.25);
        }
        .btn-gradient:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 25px rgba(0, 102, 255, 0.35);
            color: #ffffff;
        }
        .btn-outline {
            background: transparent;
            border: 1px solid rgba(0, 102, 255, 0.2);
            color: var(--brand-primary);
        }
        .btn-outline:hover {
            background: rgba(0, 102, 255, 0.05);
            border-color: var(--brand-primary);
        }

        /* 数据徽章 */
        .badge-pill {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            background: rgba(0, 210, 160, 0.12);
            color: #008764;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 600;
            border: 1px solid rgba(0, 210, 160, 0.25);
        }
        .badge-pill.blue {
            background: rgba(0, 102, 255, 0.08);
            color: var(--brand-primary);
            border-color: rgba(0, 102, 255, 0.2);
        }

        /* 板块公用 */
        .section {
            padding: 100px 0;
            position: relative;
        }
        .section-header {
            text-align: center;
            max-width: 780px;
            margin: 0 auto 60px;
        }
        .section-tag {
            margin-bottom: 16px;
        }
        .section-title {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-heading);
            line-height: 1.3;
            margin-bottom: 20px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-body);
            line-height: 1.7;
        }

        /* 1. Hero 区域：左文右图 5:7 错位 */
        .hero-section {
            padding: 60px 0 100px;
            background: radial-gradient(circle at 10% 20%, rgba(0, 102, 255, 0.04) 0%, transparent 50%),
                        radial-gradient(circle at 90% 80%, rgba(0, 210, 160, 0.04) 0%, transparent 50%),
                        #FFFFFF;
            overflow: hidden;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 5fr 7fr;
            gap: 48px;
            align-items: center;
        }
        .hero-content h1 {
            font-size: 46px;
            font-weight: 900;
            color: var(--text-heading);
            line-height: 1.25;
            margin: 20px 0;
            letter-spacing: -1px;
        }
        .hero-content h1 span {
            background: var(--gradient-accent);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-desc {
            font-size: 16px;
            color: var(--text-body);
            margin-bottom: 32px;
            line-height: 1.75;
        }
        .hero-cta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 40px;
        }
        .hero-kpi-bar {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            padding-top: 28px;
            border-top: 1px solid #E2E8F0;
        }
        .kpi-item h4 {
            font-size: 28px;
            font-weight: 800;
            color: var(--brand-primary);
        }
        .kpi-item p {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 4px;
        }
        .hero-visual {
            position: relative;
        }
        .hero-img-wrap {
            position: relative;
            border-radius: 28px;
            overflow: hidden;
            box-shadow: 0 25px 60px -15px rgba(10, 37, 64, 0.15);
            border: 4px solid #FFFFFF;
        }
        .hero-floating-badge {
            position: absolute;
            bottom: 24px;
            left: -20px;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            padding: 16px 24px;
            border-radius: 18px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
            border: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            gap: 16px;
            z-index: 2;
        }
        .floating-icon {
            width: 48px;
            height: 48px;
            background: rgba(0, 210, 160, 0.15);
            color: #008764;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
        }

        /* 2. 产品价值 (卖点三连) */
        .highlights-section {
            background-color: var(--bg-light);
        }
        .highlights-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .highlight-card {
            background: var(--bg-surface);
            border-radius: var(--radius-card);
            padding: 40px 32px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .highlight-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--gradient-accent);
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .highlight-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(0, 102, 255, 0.2);
        }
        .highlight-card:hover::before {
            opacity: 1;
        }
        .highlight-icon {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            background: rgba(0, 102, 255, 0.06);
            color: var(--brand-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            margin-bottom: 24px;
        }
        .highlight-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 14px;
        }
        .highlight-card p {
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.7;
        }

        /* 3. 平台硬核介绍 */
        .about-section {
            background: #FFFFFF;
        }
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .about-image {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid #E2E8F0;
        }
        .spec-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-top: 30px;
        }
        .spec-box {
            padding: 16px 20px;
            background: var(--bg-light);
            border-radius: 14px;
            border: 1px solid #E2E8F0;
        }
        .spec-box h5 {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 4px;
        }
        .spec-box span {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-heading);
        }

        /* 4. 功能展示 (6大网格) */
        .features-section {
            background: var(--bg-light);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-surface);
            border-radius: var(--radius-card);
            padding: 36px 28px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .feature-icon-wrap {
            width: 50px;
            height: 50px;
            background: rgba(0, 210, 160, 0.1);
            color: #008764;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 20px;
        }
        .feature-card h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 12px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.65;
        }

        /* 5. 解决方案模块 (纵向卡片) */
        .modules-section {
            background: #FFFFFF;
        }
        .modules-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .module-card {
            background: #FFFFFF;
            border-radius: var(--radius-card);
            padding: 40px 32px;
            border: 1px solid #E2E8F0;
            position: relative;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
        }
        .module-card.featured {
            border: 2px solid var(--brand-primary);
            box-shadow: 0 15px 40px -10px rgba(0, 102, 255, 0.2);
        }
        .module-tag {
            position: absolute;
            top: -14px;
            right: 28px;
            background: var(--gradient-accent);
            color: #fff;
            padding: 4px 14px;
            font-size: 12px;
            font-weight: 700;
            border-radius: var(--radius-pill);
        }
        .module-card h3 {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-heading);
            margin-bottom: 12px;
        }
        .module-card p {
            font-size: 14px;
            color: var(--text-body);
            margin-bottom: 24px;
        }
        .module-checklist {
            margin-bottom: 32px;
        }
        .module-checklist li {
            font-size: 14px;
            color: var(--text-body);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .module-checklist li i {
            color: var(--brand-accent);
        }

        /* 6. 深色对比度理念区 */
        .tech-dark-section {
            background: var(--bg-deep);
            color: #FFFFFF;
            position: relative;
            overflow: hidden;
        }
        .tech-dark-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 102, 255, 0.15) 0%, transparent 70%);
            border-radius: 50%;
        }
        .tech-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .tech-content h2 {
            font-size: 34px;
            font-weight: 800;
            color: #FFFFFF;
            line-height: 1.3;
            margin-bottom: 20px;
        }
        .tech-content p {
            font-size: 15px;
            color: #94A3B8;
            line-height: 1.75;
            margin-bottom: 30px;
        }
        .tech-badge-group {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .tech-badge {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            padding: 8px 16px;
            border-radius: 10px;
            font-size: 13px;
            color: #E2E8F0;
        }
        .tech-card-wrap {
            background: var(--bg-card-dark);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-card);
            padding: 30px;
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
        }

        /* 7. 三步上手 */
        .steps-section {
            background: var(--bg-light);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            position: relative;
        }
        .step-card {
            background: #FFFFFF;
            border-radius: var(--radius-card);
            padding: 40px 32px;
            border: 1px solid #E2E8F0;
            position: relative;
        }
        .step-num {
            font-size: 40px;
            font-weight: 900;
            color: rgba(0, 102, 255, 0.12);
            line-height: 1;
            margin-bottom: 16px;
        }
        .step-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 12px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.65;
        }

        /* 8. 真实场景与用户故事 */
        .stories-section {
            background: #FFFFFF;
        }
        .story-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
            margin-bottom: 60px;
        }
        .story-row:last-child {
            margin-bottom: 0;
        }
        .story-img {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .story-content h3 {
            font-size: 24px;
            font-weight: 800;
            color: var(--text-heading);
            margin-bottom: 16px;
        }
        .story-content p {
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        /* 9. 关键量化数据统计条 */
        .metrics-section {
            background: var(--gradient-accent);
            color: #FFFFFF;
            padding: 60px 0;
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .metric-card h3 {
            font-size: 42px;
            font-weight: 900;
            margin-bottom: 8px;
            color: #FFFFFF;
        }
        .metric-card p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.9);
            font-weight: 500;
        }

        /* 10. 评价墙 (社会认同) */
        .reviews-section {
            background: var(--bg-light);
        }
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .review-card {
            background: #FFFFFF;
            border-radius: var(--radius-card);
            padding: 36px 28px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .stars-row {
            color: #F59E0B;
            font-size: 14px;
            margin-bottom: 16px;
        }
        .review-text {
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 24px;
        }
        .reviewer-info {
            display: flex;
            align-items: center;
            gap: 14px;
            border-top: 1px solid #F1F5F9;
            padding-top: 16px;
        }
        .reviewer-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #E2E8F0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--brand-primary);
        }
        .reviewer-meta h5 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-heading);
        }
        .reviewer-meta p {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 11. 资讯与训练科学 */
        .insights-section {
            background: #FFFFFF;
        }
        .insights-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .insight-card {
            border-radius: var(--radius-card);
            background: var(--bg-surface);
            border: 1px solid #E2E8F0;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
        }
        .insight-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .insight-img-wrap {
            height: 180px;
            overflow: hidden;
        }
        .insight-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .insight-card:hover .insight-img-wrap img {
            transform: scale(1.05);
        }
        .insight-body {
            padding: 24px;
        }
        .insight-date {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
        }
        .insight-body h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .insight-body p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.6;
        }

        /* 12. 常见问题 (FAQ 手风琴) */
        .faq-section {
            background: var(--bg-light);
        }
        .faq-container {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: #FFFFFF;
            border-radius: 14px;
            border: 1px solid #E2E8F0;
            margin-bottom: 16px;
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .faq-item.active {
            border-color: var(--brand-primary);
            box-shadow: 0 4px 15px rgba(0, 102, 255, 0.08);
        }
        .faq-header {
            padding: 20px 24px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 700;
            font-size: 16px;
            color: var(--text-heading);
            position: relative;
        }
        .faq-item.active .faq-header {
            color: var(--brand-primary);
        }
        .faq-body {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.75;
            display: none;
        }
        .faq-item.active .faq-body {
            display: block;
        }
        .faq-toggle {
            transition: transform 0.3s ease;
        }
        .faq-item.active .faq-toggle {
            transform: rotate(180deg);
        }

        /* 13. 保障条 */
        .guarantee-section {
            background: #FFFFFF;
            border-top: 1px solid #E2E8F0;
            border-bottom: 1px solid #E2E8F0;
            padding: 40px 0;
        }
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .guarantee-box {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .guarantee-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(0, 102, 255, 0.06);
            color: var(--brand-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
        }
        .guarantee-box h5 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-heading);
        }
        .guarantee-box p {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 14. 转化表单区 */
        .contact-section {
            background: radial-gradient(circle at 50% 0%, #10243E 0%, #061120 100%);
            color: #FFFFFF;
            padding: 100px 0;
        }
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1.1fr;
            gap: 60px;
            align-items: center;
        }
        .contact-info h2 {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 20px;
        }
        .contact-info p {
            font-size: 16px;
            color: #94A3B8;
            line-height: 1.75;
            margin-bottom: 30px;
        }
        .contact-perks {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .contact-perks li {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 15px;
            color: #E2E8F0;
        }
        .contact-perks li i {
            color: var(--brand-accent);
        }
        .contact-form-wrap {
            background: #FFFFFF;
            border-radius: var(--radius-card);
            padding: 40px;
            color: var(--text-heading);
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
        }
        .contact-form-wrap h3 {
            font-size: 22px;
            font-weight: 800;
            margin-bottom: 8px;
        }
        .contact-form-wrap p {
            font-size: 14px;
            color: var(--text-body);
            margin-bottom: 24px;
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text-heading);
        }
        .form-control {
            width: 100%;
            height: 46px;
            border-radius: 10px;
            border: 1px solid #CBD5E1;
            padding: 0 16px;
            font-size: 14px;
            color: var(--text-heading);
            background: #F8FAFC;
            transition: border-color 0.2s;
        }
        .form-control:focus {
            outline: none;
            border-color: var(--brand-primary);
            background: #FFFFFF;
        }

        /* 底部固定转化浮条 */
        .bottom-sticky-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(10, 37, 64, 0.95);
            backdrop-filter: blur(12px);
            padding: 14px 0;
            color: #FFFFFF;
            z-index: 999;
            box-shadow: 0 -5px 20px rgba(0, 0, 0, 0.15);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            transform: translateY(100%);
            transition: transform 0.3s ease;
        }
        .bottom-sticky-bar.show {
            transform: translateY(0);
        }
        .sticky-bar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        /* 页脚 */
        .site-footer {
            background: #061120;
            color: #94A3B8;
            padding: 60px 0 30px;
            font-size: 14px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand h4 {
            font-size: 20px;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 16px;
        }
        .footer-brand p {
            line-height: 1.7;
            font-size: 13px;
        }
        .footer-links h5 {
            color: #FFFFFF;
            font-size: 15px;
            margin-bottom: 18px;
        }
        .footer-links ul li {
            margin-bottom: 10px;
        }
        .footer-links ul li a:hover {
            color: var(--brand-accent);
        }
        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            flex-wrap: wrap;
            gap: 12px;
        }

        /* 移动端菜单控制 */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--brand-dark);
            cursor: pointer;
        }

        /* 响应式断点 */
        @media (max-width: 1024px) {
            .hero-grid, .about-grid, .tech-grid, .story-row, .contact-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .features-grid, .modules-grid, .reviews-grid, .insights-grid, .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .guarantee-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-content h1 {
                font-size: 36px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .topbar { display: none; }
            .mobile-toggle { display: block; }
            .nav-menu {
                position: fixed;
                top: 80px;
                left: 0;
                right: 0;
                background: #FFFFFF;
                flex-direction: column;
                padding: 24px;
                gap: 16px;
                box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
                display: none;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-actions { display: none; }
            .highlights-grid, .features-grid, .modules-grid, .reviews-grid, .insights-grid, .steps-grid, .metrics-grid {
                grid-template-columns: 1fr;
            }
            .guarantee-grid {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 28px;
            }
            .hero-content h1 {
                font-size: 30px;
            }
            .sticky-bar-inner {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }