/* roulang page: index */
:root {
            --primary: #0F5B78;
            --primary-dark: #0A3E52;
            --primary-light: #EBF3F6;
            --accent: #E86328;
            --accent-hover: #CF521B;
            --bg-main: #F8FAFB;
            --bg-card: #FFFFFF;
            --bg-dark: #0B151F;
            --text-main: #1E293B;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
            --shadow-sm: 0 2px 4px rgba(15, 91, 120, 0.04);
            --shadow-md: 0 10px 24px -6px rgba(15, 91, 120, 0.08);
            --shadow-lg: 0 18px 36px -8px rgba(11, 21, 31, 0.12);
            --radius: 8px;
            --radius-btn: 6px;
            --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-main);
            color: var(--text-main);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button, input {
            font-family: inherit;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 顶部通栏 */
        .top-bar {
            background-color: var(--bg-dark);
            color: #94A3B8;
            font-size: 13px;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .top-bar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .top-tags {
            display: flex;
            gap: 18px;
        }
        .top-tags span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .top-tags span::before {
            content: "✓";
            color: #38BDF8;
            font-size: 11px;
            font-weight: bold;
        }

        /* 主导航 */
        .site-header {
            background-color: #FFFFFF;
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
        }
        .header-content {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .brand-logo {
            font-size: 24px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .brand-logo-badge {
            background: var(--primary-light);
            color: var(--primary);
            font-size: 11px;
            padding: 3px 8px;
            border-radius: 4px;
            font-weight: 600;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 28px;
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            position: relative;
            padding: 6px 0;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary);
            transition: var(--transition);
        }
        .nav-link:hover::after, .nav-link.active::after {
            width: 100%;
        }

        /* 按钮体系 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            border: 1px solid transparent;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-primary {
            background-color: var(--accent);
            color: #FFFFFF;
        }
        .btn-primary:hover {
            background-color: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(232, 99, 40, 0.28);
        }
        .btn-outline-white {
            border-color: rgba(255, 255, 255, 0.4);
            color: #FFFFFF;
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(4px);
        }
        .btn-outline-white:hover {
            background: #FFFFFF;
            color: var(--bg-dark);
            border-color: #FFFFFF;
        }
        .btn-outline-primary {
            border-color: var(--primary);
            color: var(--primary);
            background: transparent;
        }
        .btn-outline-primary:hover {
            background: var(--primary-light);
        }

        /* 汉堡按钮 */
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 6px;
        }
        .menu-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--text-main);
            transition: var(--transition);
        }

        /* 板块公用 */
        section {
            padding: 84px 0;
            position: relative;
        }
        .section-header {
            text-align: center;
            max-width: 760px;
            margin: 0 auto 54px;
        }
        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 14px;
            border-radius: 20px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.3;
            margin-bottom: 16px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 1. 首屏 Banner (Hero 直播预告与管控总览) */
        .hero-section {
            background: linear-gradient(135deg, rgba(11, 21, 31, 0.92) 0%, rgba(15, 91, 120, 0.88) 100%), url('/assets/images/e3876a96b1eb80c6.jpg') center/cover no-repeat;
            color: #FFFFFF;
            padding: 96px 0 108px;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 48px;
            align-items: center;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(232, 99, 40, 0.2);
            border: 1px solid rgba(232, 99, 40, 0.5);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 13px;
            color: #FFB38A;
            margin-bottom: 20px;
        }
        .hero-live-dot {
            width: 8px;
            height: 8px;
            background: #E86328;
            border-radius: 50%;
            display: inline-block;
            box-shadow: 0 0 0 0 rgba(232, 99, 40, 0.7);
            animation: pulse 1.8s infinite;
        }
        @keyframes pulse {
            0% { box-shadow: 0 0 0 0 rgba(232, 99, 40, 0.7); }
            70% { box-shadow: 0 0 0 10px rgba(232, 99, 40, 0); }
            100% { box-shadow: 0 0 0 0 rgba(232, 99, 40, 0); }
        }
        .hero-title {
            font-size: 40px;
            line-height: 1.25;
            font-weight: 800;
            margin-bottom: 22px;
            color: #FFFFFF;
        }
        .hero-desc {
            font-size: 16px;
            line-height: 1.8;
            color: #CBD5E1;
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            align-items: center;
        }
        .hero-countdown-card {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius);
            padding: 32px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
        }
        .live-card-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.12);
            padding-bottom: 16px;
            margin-bottom: 20px;
        }
        .live-card-header h3 {
            font-size: 18px;
            color: #FFFFFF;
            font-weight: 700;
        }
        .live-badge {
            background: #0F5B78;
            color: #38BDF8;
            font-size: 12px;
            padding: 3px 10px;
            border-radius: 4px;
        }
        .timer-boxes {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 12px;
            margin-bottom: 24px;
            text-align: center;
        }
        .timer-box {
            background: rgba(11, 21, 31, 0.6);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 6px;
            padding: 12px 6px;
        }
        .timer-number {
            font-size: 26px;
            font-weight: 800;
            color: #FFB38A;
            line-height: 1.1;
            font-family: monospace;
        }
        .timer-label {
            font-size: 11px;
            color: #94A3B8;
            margin-top: 4px;
        }
        .subscribe-form {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .subscribe-input {
            width: 100%;
            padding: 12px 16px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-btn);
            color: #FFFFFF;
            font-size: 14px;
            outline: none;
            transition: var(--transition);
        }
        .subscribe-input:focus {
            border-color: var(--accent);
            background: rgba(255, 255, 255, 0.12);
        }
        .subscribe-input::placeholder {
            color: #94A3B8;
        }

        /* 2. 合集目录与产品架构 (Intro) */
        .intro-section {
            background-color: #FFFFFF;
        }
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .intro-img-wrap {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-color);
        }
        .intro-specs {
            margin-top: 24px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .spec-item {
            padding: 14px;
            background: var(--bg-main);
            border-radius: 6px;
            border-left: 3px solid var(--primary);
        }
        .spec-title {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 4px;
        }
        .spec-val {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
        }

        /* 3. 痛点清单 (Painpoints) */
        .pain-section {
            background-color: var(--bg-main);
        }
        .pain-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .pain-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 24px;
            transition: var(--transition);
            position: relative;
        }
        .pain-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: #CBD5E1;
        }
        .pain-index {
            font-size: 28px;
            font-weight: 800;
            color: #CBD5E1;
            line-height: 1;
            margin-bottom: 14px;
        }
        .pain-title {
            font-size: 17px;
            font-weight: 700;
            color: #DC2626;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .pain-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 14px;
        }
        .pain-resolve {
            border-top: 1px dashed var(--border-color);
            padding-top: 12px;
            font-size: 13px;
            color: var(--primary);
            font-weight: 600;
        }

        /* 4. 核心优势区 (Advantages 6卡片) */
        .advantages-section {
            background-color: #FFFFFF;
        }
        .adv-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .adv-card {
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 28px;
            background: #FFFFFF;
            transition: var(--transition);
        }
        .adv-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .adv-icon {
            width: 44px;
            height: 44px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            margin-bottom: 18px;
        }
        .adv-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-main);
        }
        .adv-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 5. 核心产品子系统 (Modules 3卡片) */
        .modules-section {
            background-color: var(--bg-main);
        }
        .modules-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .module-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .module-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .module-thumb {
            height: 180px;
            overflow: hidden;
        }
        .module-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .module-card:hover .module-thumb img {
            transform: scale(1.05);
        }
        .module-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .module-target {
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            display: inline-block;
            padding: 2px 8px;
            border-radius: 4px;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .module-title {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-main);
        }
        .module-features {
            list-style: none;
            margin: 16px 0 20px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .module-features li {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .module-features li::before {
            content: "•";
            color: var(--accent);
            font-size: 16px;
        }

        /* 6. 深色交付理念区 (Methodology 沉浸深色) */
        .methodology-section {
            background-color: var(--bg-dark);
            color: #FFFFFF;
        }
        .method-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .method-step-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius);
            padding: 28px 20px;
            position: relative;
        }
        .method-step-num {
            font-size: 36px;
            font-weight: 900;
            color: rgba(255, 255, 255, 0.15);
            line-height: 1;
            margin-bottom: 14px;
        }
        .method-step-title {
            font-size: 17px;
            font-weight: 700;
            color: #38BDF8;
            margin-bottom: 10px;
        }
        .method-step-desc {
            font-size: 13px;
            color: #94A3B8;
            line-height: 1.7;
        }

        /* 7. 相关推荐与标杆案例 (Cases 左右交错) */
        .cases-section {
            background-color: #FFFFFF;
        }
        .case-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            margin-bottom: 56px;
        }
        .case-row:last-child {
            margin-bottom: 0;
        }
        .case-row.reverse {
            direction: rtl;
        }
        .case-row.reverse .case-content {
            direction: ltr;
        }
        .case-cover {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-color);
        }
        .case-tag {
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .case-title {
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--text-main);
        }
        .case-desc {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 20px;
        }
        .case-stats {
            display: flex;
            gap: 24px;
            background: var(--bg-main);
            padding: 16px 20px;
            border-radius: 6px;
        }
        .case-stat-val {
            font-size: 22px;
            font-weight: 800;
            color: var(--accent);
        }
        .case-stat-lbl {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 8. 关键能效数据统计条 (Metrics 高对比横幅) */
        .metrics-section {
            background: var(--primary);
            color: #FFFFFF;
            padding: 60px 0;
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }
        .metric-box {
            padding: 0 10px;
            border-right: 1px solid rgba(255, 255, 255, 0.15);
        }
        .metric-box:last-child {
            border-right: none;
        }
        .metric-number {
            font-size: 42px;
            font-weight: 900;
            color: #FFB38A;
            line-height: 1.1;
            margin-bottom: 8px;
            font-family: monospace;
        }
        .metric-title {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .metric-sub {
            font-size: 13px;
            color: #CBD5E1;
        }

        /* 9. 用户口碑证言区 (Testimonials) */
        .testimonials-section {
            background-color: var(--bg-main);
        }
        .testi-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .testi-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 28px;
            box-shadow: var(--shadow-sm);
        }
        .testi-content {
            font-size: 14px;
            color: var(--text-main);
            line-height: 1.7;
            margin-bottom: 20px;
            position: relative;
        }
        .testi-content::before {
            content: "“";
            font-size: 40px;
            color: var(--primary-light);
            position: absolute;
            top: -20px;
            left: -10px;
            z-index: 0;
        }
        .testi-author {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--border-color);
            padding-top: 16px;
        }
        .author-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #FFFFFF;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 15px;
        }        .author-info h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
        }
        .author-info p {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 10. 资讯与干货卡片 (News) */
        .news-section {
            background-color: #FFFFFF;
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .news-card {
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            background: #FFFFFF;
            transition: var(--transition);
        }
        .news-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .news-thumb {
            height: 190px;
            overflow: hidden;
        }
        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .news-card:hover .news-thumb img {
            transform: scale(1.05);
        }
        .news-body {
            padding: 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-meta {
            display: flex;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .news-title {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.4;
            color: var(--text-main);
        }
        .news-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }
        .news-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* 11. FAQ 手风琴区 */
        .faq-section {
            background-color: var(--bg-main);
        }
        .faq-wrapper {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item.active {
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 20px 24px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
            background: #FFFFFF;
        }
        .faq-question h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
        }
        .faq-icon {
            font-size: 18px;
            color: var(--primary);
            transition: transform 0.25s ease;
        }
        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            background: #FAFCFD;
            border-top: 1px solid transparent;
        }
        .faq-item.active .faq-answer {
            max-height: 220px;
            border-top-color: var(--border-color);
        }
        .faq-answer-inner {
            padding: 20px 24px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        /* 12. 底部高转化激活区 (CTA) */
        .cta-section {
            background: linear-gradient(135deg, #0F5B78 0%, #0A3E52 100%);
            color: #FFFFFF;
            padding: 72px 0;
        }
        .cta-box {
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
        }
        .cta-title {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 14px;
            color: #FFFFFF;
        }
        .cta-desc {
            font-size: 16px;
            color: #CBD5E1;
            margin-bottom: 32px;
        }
        .cta-form {
            display: flex;
            gap: 12px;
            justify-content: center;
            max-width: 620px;
            margin: 0 auto 20px;
        }
        .cta-form input {
            flex: 1;
            padding: 14px 18px;
            border-radius: var(--radius-btn);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.1);
            color: #FFFFFF;
            font-size: 14px;
            outline: none;
        }
        .cta-form input:focus {
            background: rgba(255, 255, 255, 0.16);
            border-color: #FFFFFF;
        }
        .cta-form input::placeholder {
            color: #CBD5E1;
        }
        .cta-badges {
            display: flex;
            justify-content: center;
            gap: 24px;
            font-size: 12px;
            color: #94A3B8;
        }
        .cta-badges span::before {
            content: "✓ ";
            color: #38BDF8;
        }

        /* 页脚 */
        .site-footer {
            background-color: var(--bg-dark);
            color: #94A3B8;
            padding: 60px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 13px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-col h4 {
            color: #FFFFFF;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 18px;
        }
        .footer-col p {
            line-height: 1.8;
            margin-bottom: 12px;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a:hover {
            color: #FFFFFF;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            text-align: center;
            font-size: 12px;
            color: #64748B;
        }

        /* 移动端菜单抽屉遮罩 */
        .mobile-menu-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100vw;
            height: 100vh;
            background: rgba(11, 21, 31, 0.8);
            backdrop-filter: blur(4px);
            z-index: 998;
            display: none;
        }
        .mobile-menu-overlay.active {
            display: block;
        }

        /* 响应式断点 */
        @media (max-width: 1024px) {
            .adv-grid, .modules-grid, .news-grid, .testi-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .method-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .pain-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .top-bar { display: none; }
            .menu-toggle { display: flex; }
            .nav-menu {
                position: fixed;
                top: 72px;
                right: -100%;
                width: 260px;
                height: calc(100vh - 72px);
                background: #FFFFFF;
                flex-direction: column;
                align-items: flex-start;
                padding: 24px;
                gap: 20px;
                box-shadow: -4px 0 16px rgba(0, 0, 0, 0.1);
                transition: right 0.3s ease;
                z-index: 999;
            }
            .nav-menu.open {
                right: 0;
            }
            .hero-grid, .intro-grid, .case-row, .case-row.reverse {
                grid-template-columns: 1fr;
                gap: 32px;
                direction: ltr;
            }
            .hero-title {
                font-size: 28px;
            }
            .section-title {
                font-size: 24px;
            }
            .adv-grid, .modules-grid, .news-grid, .testi-grid, .pain-grid, .method-grid, .metrics-grid {
                grid-template-columns: 1fr;
            }
            .metric-box {
                border-right: none;
                border-bottom: 1px solid rgba(255, 255, 255, 0.15);
                padding-bottom: 20px;
            }
            .metric-box:last-child {
                border-bottom: none;
                padding-bottom: 0;
            }
            .cta-form {
                flex-direction: column;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }