/* roulang page: index */
:root {
            --primary: #0A4DA2;
            --primary-hover: #0066FF;
            --accent: #00B4D8;
            --slate: #64748B;
            --dark-900: #0F172A;
            --dark-800: #1E293B;
            --bg-light: #F8FAFC;
            --white: #FFFFFF;
            --text-dark: #1E293B;
            --text-muted: #475569;
            --border-color: #E2E8F0;
            --border-dark: #334155;
            --radius-sm: 6px;
            --radius-md: 10px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
            --shadow-md: 0 6px 16px -2px rgba(10,77,162,0.08);
            --shadow-lg: 0 14px 28px -6px rgba(10,77,162,0.12);
            --font-stack: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-stack);
            background-color: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

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

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

        .section-padding {
            padding: 88px 0;
        }

        .section-header {
            margin-bottom: 52px;
        }

        .section-header.text-center {
            text-align: center;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }

        .section-badge {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(10, 77, 162, 0.08);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            border-radius: 20px;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
            border: 1px solid rgba(10, 77, 162, 0.15);
        }

        .section-badge.badge-dark {
            background: rgba(0, 180, 216, 0.12);
            color: var(--accent);
            border-color: rgba(0, 180, 216, 0.25);
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.35;
            letter-spacing: -0.01em;
            margin-bottom: 16px;
        }

        .section-title.title-white {
            color: var(--white);
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.8;
        }

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

        /* 顶部双行导航系统 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--white);
            box-shadow: 0 2px 10px rgba(0,0,0,0.04);
            border-bottom: 1px solid var(--border-color);
        }

        .top-aux-bar {
            background: #F1F5F9;
            font-size: 13px;
            color: var(--slate);
            padding: 7px 0;
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
        }

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

        .aux-meta-group {
            display: flex;
            align-items: center;
            gap: 22px;
        }

        .aux-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .main-nav-bar {
            height: 74px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
        }

        .logo-symbol {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--white);
            font-weight: 900;
            font-size: 18px;
            box-shadow: 0 3px 8px rgba(10, 77, 162, 0.3);
        }

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

        .nav-links a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-dark);
            padding: 8px 2px;
            position: relative;
        }

        .nav-links a:hover, .nav-links a.active {
            color: var(--primary);
        }

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

        .nav-links a:hover::after, .nav-links a.active::after {
            width: 100%;
        }

        .nav-action-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            background: var(--primary);
            color: var(--white) !important;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: 1px solid var(--primary);
            box-shadow: 0 4px 10px rgba(10, 77, 162, 0.2);
        }

        .nav-action-btn:hover {
            background: var(--primary-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 14px rgba(10, 77, 162, 0.3);
        }

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

        .mobile-toggle svg {
            width: 26px;
            height: 26px;
        }

        /* 1. 首屏获客与问题式 Hero */
        .hero-section {
            position: relative;
            background-color: var(--dark-900);
            background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.94) 0%, rgba(30, 41, 59, 0.92) 100%), url('/assets/images/757921425c099ff1.webp');
            background-size: cover;
            background-position: center;
            color: var(--white);
            padding: 96px 0 108px;
            overflow: hidden;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }

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

        .hero-content h1 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin-bottom: 22px;
        }

        .hero-lead-text {
            font-size: 17px;
            line-height: 1.8;
            color: #CBD5E1;
            margin-bottom: 30px;
        }

        .hero-feature-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 36px;
        }

        .hero-tag-item {
            background: rgba(255,255,255,0.07);
            border: 1px solid rgba(255,255,255,0.14);
            padding: 6px 14px;
            border-radius: var(--radius-sm);
            font-size: 13px;
            color: #E2E8F0;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .hero-tag-item svg {
            color: var(--accent);
        }

        .hero-form-card {
            background: var(--white);
            border-radius: var(--radius-md);
            padding: 34px 30px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
            border: 1px solid rgba(255, 255, 255, 0.8);
            color: var(--text-dark);
        }

        .form-card-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--dark-900);
            margin-bottom: 8px;
        }

        .form-card-subtitle {
            font-size: 13px;
            color: var(--slate);
            margin-bottom: 22px;
        }

        .form-group {
            margin-bottom: 16px;
        }

        .form-label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text-dark);
        }

        .form-control {
            width: 100%;
            height: 44px;
            padding: 10px 14px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 14px;
            background: #F8FAFC;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            background: var(--white);
            box-shadow: 0 0 0 3px rgba(10, 77, 162, 0.15);
        }

        .btn-submit-hero {
            width: 100%;
            height: 46px;
            background: var(--primary);
            color: var(--white);
            font-weight: 600;
            font-size: 15px;
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
            margin-top: 10px;
        }

        .btn-submit-hero:hover {
            background: var(--primary-hover);
            box-shadow: 0 4px 12px rgba(10, 77, 162, 0.3);
        }

        /* 2. 架构概览区 */
        .arch-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 54px;
            align-items: center;
        }

        .arch-image-wrap {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
        }

        .arch-points-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 18px;
            margin-top: 24px;
        }

        .arch-point-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }

        .point-icon {
            width: 32px;
            height: 32px;
            min-width: 32px;
            background: rgba(10, 77, 162, 0.08);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 14px;
            font-weight: 700;
        }

        .point-body h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--text-dark);
        }

        .point-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 3. 核心优势 6卡片网格 */
        .advantage-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }

        .adv-card {
            background: var(--white);
            border-radius: var(--radius-md);
            padding: 32px 26px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .adv-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(10, 77, 162, 0.25);
        }

        .adv-icon-box {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, rgba(10, 77, 162, 0.1), rgba(0, 180, 216, 0.15));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .adv-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-dark);
        }

        .adv-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 4. 解决方案 3大重点卡片 */
        .products-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .product-card {
            background: var(--white);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .product-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
        }

        .product-thumb {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

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

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

        .product-body {
            padding: 26px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }

        .product-spec-tag {
            font-size: 12px;
            color: var(--primary);
            font-weight: 600;
            background: #EFF6FF;
            padding: 3px 10px;
            border-radius: 4px;
            display: inline-block;
            margin-bottom: 12px;
            align-self: flex-start;
        }

        .product-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-dark);
        }

        .product-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 18px;
            flex-grow: 1;
        }

        .spec-list {
            list-style: none;
            border-top: 1px solid var(--border-color);
            padding-top: 14px;
            margin-bottom: 20px;
        }

        .spec-item {
            font-size: 13px;
            color: var(--slate);
            display: flex;
            justify-content: space-between;
            margin-bottom: 6px;
        }

        .spec-item span:last-child {
            font-weight: 600;
            color: var(--text-dark);
        }

        .btn-card-action {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 9px 18px;
            background: #F1F5F9;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }

        .btn-card-action:hover {
            background: var(--primary);
            color: var(--white);
        }

        /* 5. 深色理念与技术拓扑 */
        .dark-concept-section {
            background-color: var(--dark-900);
            background-image: linear-gradient(180deg, #0F172A 0%, #1E293B 100%);
            color: var(--white);
            border-top: 1px solid var(--border-dark);
            border-bottom: 1px solid var(--border-dark);
        }

        .concept-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .concept-feature-box {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: 24px;
            margin-top: 20px;
        }

        .concept-feature-box h4 {
            font-size: 16px;
            color: var(--accent);
            margin-bottom: 8px;
        }

        .concept-feature-box p {
            font-size: 14px;
            color: #94A3B8;
            line-height: 1.6;
        }

        .topology-graphic {
            background: #0B1120;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-dark);
            padding: 30px;
            box-shadow: inset 0 2px 10px rgba(0,0,0,0.5);
        }

        .topology-layer {
            background: #1E293B;
            border: 1px dashed #475569;
            border-radius: var(--radius-sm);
            padding: 14px;
            margin-bottom: 14px;
            text-align: center;
            font-size: 14px;
            font-weight: 600;
            color: #E2E8F0;
        }

        .topology-layer.highlight {
            background: rgba(10, 77, 162, 0.4);
            border-color: var(--accent);
            color: #38BDF8;
        }

        .topology-arrow {
            text-align: center;
            color: #64748B;
            font-size: 14px;
            margin: -6px 0 6px;
        }

        /* 6. 主机厂量产案例 */
        .case-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }

        .case-card {
            background: var(--white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 32px;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .case-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 16px;
        }

        .case-tag {
            font-size: 13px;
            color: var(--primary);
            background: rgba(10, 77, 162, 0.08);
            padding: 4px 10px;
            border-radius: 4px;
            font-weight: 600;
        }

        .case-scale {
            font-size: 13px;
            color: var(--slate);
        }

        .case-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--text-dark);
        }

        .case-desc {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .case-metrics-row {
            display: flex;
            gap: 24px;
            border-top: 1px solid var(--border-color);
            padding-top: 16px;
        }

        .case-metric-item h5 {
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 2px;
        }

        .case-metric-item span {
            font-size: 12px;
            color: var(--slate);
        }

        /* 7. 量化数据统计条 */
        .metrics-section {
            background: #0B1120;
            color: var(--white);
            padding: 60px 0;
            border-top: 1px solid #1E293B;
            border-bottom: 1px solid #1E293B;
        }

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

        .metric-block h3 {
            font-size: 44px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.1;
            margin-bottom: 8px;
            letter-spacing: -1px;
        }

        .metric-block p {
            font-size: 14px;
            color: #94A3B8;
            font-weight: 500;
        }

        /* 8. 客户与专家评价 */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }

        .testimonial-card {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-sm);
        }

        .testimonial-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 20px;
            font-style: normal;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 14px;
            border-top: 1px solid #F1F5F9;
            padding-top: 16px;
        }

        .author-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #E2E8F0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--primary);
            font-size: 14px;
        }

        .author-info h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-dark);
        }

        .author-info p {
            font-size: 12px;
            color: var(--slate);
        }

        /* 9. 新闻与技术动态摘要 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }

        .news-card {
            background: var(--white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 22px;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .news-meta-date {
            font-size: 12px;
            color: var(--slate);
            margin-bottom: 8px;
        }

        .news-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.45;
            margin-bottom: 10px;
        }

        .news-summary {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 16px;
        }

        .news-more-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .news-more-link:hover {
            color: var(--primary-hover);
        }

        /* 10. 高频技术 FAQ 手风琴 */
        .faq-accordion-wrap {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .faq-trigger {
            width: 100%;
            padding: 20px 24px;
            text-align: left;
            background: none;
            border: none;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-dark);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            transition: var(--transition);
        }

        .faq-trigger:hover {
            color: var(--primary);
            background: #F8FAFC;
        }

        .faq-trigger svg {
            width: 20px;
            height: 20px;
            transition: transform 0.3s ease;
            color: var(--slate);
        }

        .faq-item.active .faq-trigger svg {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 24px;
            background: #FCFDFF;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
        }

        .faq-item.active .faq-body {
            max-height: 220px;
            padding: 0 24px 20px;
            border-top: 1px solid #F1F5F9;
        }

        /* 11. 开发与交付保障服务条 */
        .guarantees-bar {
            background: var(--white);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            padding: 44px 0;
        }

        .guarantees-flex {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
        }

        .guarantee-item {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .guarantee-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: rgba(10, 77, 162, 0.07);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 18px;
        }

        .guarantee-content h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 2px;
        }

        .guarantee-content p {
            font-size: 12px;
            color: var(--slate);
        }

        /* 12. 底部商务与技术对接转化区 */
        .final-cta-section {
            background: linear-gradient(180deg, var(--bg-light) 0%, #FFFFFF 100%);
            padding-bottom: 96px;
        }

        .cta-card-box {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 48px;
            box-shadow: var(--shadow-lg);
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }

        .cta-info-title {
            font-size: 28px;
            font-weight: 800;
            color: var(--text-dark);
            line-height: 1.35;
            margin-bottom: 16px;
        }

        .cta-info-desc {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 26px;
        }

        .cta-direct-hotline {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 20px;
            background: #F8FAFC;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
        }

        .hotline-num {
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
        }

        .form-grid-two {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 14px;
        }

        /* 页脚区域 */
        .site-footer {
            background: #0B1120;
            color: #94A3B8;
            padding: 72px 0 32px;
            border-top: 1px solid #1E293B;
            font-size: 14px;
        }

        .footer-top-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
            gap: 48px;
            margin-bottom: 56px;
        }

        .footer-brand h3 {
            font-size: 22px;
            color: var(--white);
            font-weight: 800;
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: #64748B;
        }

        .footer-col-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }

        .footer-links-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links-list a {
            color: #94A3B8;
        }

        .footer-links-list a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-contact-info li {
            list-style: none;
            margin-bottom: 12px;
            line-height: 1.6;
        }

        .footer-bottom-bar {
            border-top: 1px solid #1E293B;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: #64748B;
        }

        /* 响应式调整 */
        @media (max-width: 1024px) {
            .hero-grid, .arch-grid, .concept-grid, .cta-card-box {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .advantage-grid, .products-grid, .testimonial-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 36px;
            }
            .guarantees-flex {
                flex-wrap: wrap;
                gap: 24px;
            }
            .footer-top-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
        }

        @media (max-width: 768px) {
            .top-aux-bar {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-links {
                position: fixed;
                top: 74px;
                left: 0;
                width: 100%;
                background: var(--white);
                flex-direction: column;
                align-items: flex-start;
                padding: 24px;
                gap: 18px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.1);
                border-bottom: 1px solid var(--border-color);
                display: none;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-action-btn {
                display: none;
            }
            .hero-content h1 {
                font-size: 32px;
            }
            .advantage-grid, .products-grid, .testimonial-grid, .case-grid, .news-grid {
                grid-template-columns: 1fr;
            }
            .footer-top-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .footer-bottom-bar {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
            .form-grid-two {
                grid-template-columns: 1fr;
            }
        }