/* roulang page: index */
:root {
            --primary: #0F241D;
            --primary-light: #1A3D32;
            --accent: #00D084;
            --accent-hover: #00b371;
            --logic-blue: #0070F3;
            --bg-light: #F7F9F8;
            --bg-dark: #091410;
            --bg-card: #FFFFFF;
            --border: #E1E7E4;
            --border-dark: rgba(255, 255, 255, 0.08);
            --text-main: #1A231F;
            --text-muted: #404D46;
            --text-sub: #809187;
            --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
            --shadow-sm: 0 2px 8px rgba(15, 36, 29, 0.04);
            --shadow-md: 0 4px 20px -2px rgba(15, 36, 29, 0.06);
            --shadow-lg: 0 12px 32px -4px rgba(15, 36, 29, 0.12);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
        }

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

        html {
            scroll-behavior: smooth;
            font-family: var(--font-sans);
            background-color: var(--bg-light);
            color: var(--text-main);
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
            width: 100%;
        }

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

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

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

        /* 顶部微型工具栏 */
        .top-bar {
            background-color: var(--bg-dark);
            color: var(--text-sub);
            font-size: 13px;
            padding: 8px 0;
            border-bottom: 1px solid var(--border-dark);
        }
        .top-bar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .top-bar-info {
            display: flex;
            gap: 20px;
        }
        .top-bar-info span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .top-bar-info span::before {
            content: "";
            display: inline-block;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background-color: var(--accent);
        }

        /* 主导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            transition: all 0.3s ease;
        }
        .nav-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.5px;
        }
        .brand-logo-icon {
            width: 38px;
            height: 38px;
            background: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-weight: 800;
            font-size: 18px;
            border: 1px solid rgba(0, 208, 132, 0.3);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }
        .nav-item a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
            padding: 8px 4px;
            position: relative;
        }
        .nav-item a:hover,
        .nav-item.active a {
            color: var(--primary);
        }
        .nav-item a:hover::after,
        .nav-item.active a::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--accent);
            border-radius: 2px;
        }
        .nav-cta-btn {
            background-color: var(--primary);
            color: #ffffff;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            border: 1px solid var(--primary);
            transition: all 0.25s ease;
        }
        .nav-cta-btn:hover {
            background-color: var(--primary-light);
            box-shadow: 0 0 12px rgba(0, 208, 132, 0.2);
            color: var(--accent);
        }

        /* 统一按钮体系 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.25s ease;
            gap: 8px;
            border: 1px solid transparent;
        }
        .btn-primary {
            background-color: var(--accent);
            color: var(--primary);
            border-color: var(--accent);
        }
        .btn-primary:hover {
            background-color: var(--accent-hover);
            border-color: var(--accent-hover);
            box-shadow: 0 4px 16px rgba(0, 208, 132, 0.35);
        }
        .btn-outline {
            background-color: transparent;
            color: #ffffff;
            border-color: rgba(255, 255, 255, 0.3);
        }
        .btn-outline:hover {
            background-color: rgba(255, 255, 255, 0.08);
            border-color: #ffffff;
        }
        .btn-dark {
            background-color: var(--primary);
            color: #ffffff;
        }
        .btn-dark:hover {
            background-color: var(--primary-light);
            color: var(--accent);
        }

        /* 板块公用规范 */
        section {
            padding: 84px 0;
            position: relative;
        }
        .section-header {
            margin-bottom: 56px;
            max-width: 780px;
        }
        .section-header.text-center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .section-badge {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--accent);
            background-color: rgba(0, 208, 132, 0.1);
            padding: 4px 12px;
            border-radius: 4px;
            margin-bottom: 12px;
            border: 1px solid rgba(0, 208, 132, 0.2);
        }
        .section-badge.dark-badge {
            background-color: rgba(15, 36, 29, 0.08);
            color: var(--primary);
            border-color: rgba(15, 36, 29, 0.15);
        }
        .section-title {
            font-size: clamp(1.85rem, 3.2vw, 2.5rem);
            font-weight: 700;
            line-height: 1.25;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .section-title.light-text {
            color: #ffffff;
        }
        .section-desc {
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-muted);
        }
        .section-desc.light-text {
            color: #A0B3AA;
        }

        /* 1. Hero 沉浸大图叙事 */
        #hero {
            position: relative;
            padding: 120px 0 100px;
            background: linear-gradient(135deg, rgba(9, 20, 16, 0.94) 0%, rgba(15, 36, 29, 0.88) 100%),
                        url('/assets/images/0470ee05e09e9928.webp') center/cover no-repeat;
            color: #ffffff;
            overflow: hidden;
        }
        .hero-content {
            max-width: 860px;
        }
        .hero-title {
            font-size: clamp(2.2rem, 4.2vw, 3.4rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.5px;
            margin-bottom: 24px;
            color: #ffffff;
        }
        .hero-title span {
            color: var(--accent);
        }
        .hero-p {
            font-size: 17px;
            line-height: 1.8;
            color: #C2D1CB;
            margin-bottom: 36px;
            max-width: 760px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 48px;
        }
        .hero-tags {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 28px;
        }
        .hero-tag-item {
            font-size: 14px;
            color: #A0B3AA;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .hero-tag-item strong {
            color: #ffffff;
        }

        /* 2. 指标看板 */
        #metrics-dashboard {
            background-color: #ffffff;
            border-bottom: 1px solid var(--border);
            padding: 60px 0;
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .metric-card {
            padding: 24px;
            background: var(--bg-light);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            transition: transform 0.25s ease, border-color 0.25s ease;
        }
        .metric-card:hover {
            transform: translateY(-4px);
            border-color: var(--accent);
            box-shadow: var(--shadow-sm);
        }
        .metric-val {
            font-size: 32px;
            font-weight: 800;
            font-variant-numeric: tabular-nums;
            color: var(--primary);
            margin-bottom: 6px;
            display: flex;
            align-items: baseline;
            gap: 4px;
        }
        .metric-val span {
            font-size: 18px;
            color: var(--accent);
            font-weight: 600;
        }
        .metric-name {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 6px;
        }
        .metric-note {
            font-size: 13px;
            color: var(--text-sub);
            line-height: 1.5;
        }

        /* 3. 产线与研发体系 */
        #brand-intro {
            background-color: var(--bg-light);
        }
        .intro-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .intro-visual {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border);
        }
        .intro-visual img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }
        .intro-content p {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 20px;
        }
        .intro-specs-list {
            list-style: none;
            margin-top: 24px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .intro-spec-item {
            background: #ffffff;
            padding: 14px 18px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .intro-spec-item::before {
            content: "✓";
            color: var(--accent);
            font-weight: 800;
        }

        /* 4. 核心优势矩阵 */
        #core-advantages {
            background-color: #ffffff;
        }
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .adv-card {
            padding: 32px 28px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            background: #ffffff;
            box-shadow: var(--shadow-sm);
            transition: all 0.25s ease;
        }
        .adv-card:hover {
            transform: translateY(-4px);
            border-color: var(--accent);
            box-shadow: var(--shadow-md);
        }
        .adv-icon {
            width: 48px;
            height: 48px;
            background: rgba(0, 208, 132, 0.12);
            color: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 20px;
            margin-bottom: 20px;
        }
        .adv-title {
            font-size: 19px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .adv-text {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-muted);
        }

        /* 5. 热门产品矩阵 */
        #product-matrix {
            background-color: var(--bg-light);
        }
        .product-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .product-card {
            background: #ffffff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            transition: all 0.25s ease;
        }
        .product-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: var(--accent);
        }
        .product-img-wrap {
            height: 220px;
            overflow: hidden;
            background: #eef2f0;
        }
        .product-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .product-card:hover .product-img-wrap img {
            transform: scale(1.04);
        }
        .product-body {
            padding: 24px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        .product-tag {
            font-size: 12px;
            font-weight: 600;
            color: var(--logic-blue);
            margin-bottom: 8px;
        }
        .product-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .product-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 20px;
            flex-grow: 1;
        }
        .product-spec-row {
            background: var(--bg-light);
            border-radius: var(--radius-sm);
            padding: 12px;
            font-size: 13px;
            color: var(--text-main);
            margin-bottom: 20px;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .product-spec-item {
            display: flex;
            justify-content: space-between;
        }
        .product-spec-item span:first-child {
            color: var(--text-sub);
        }
        .product-cta {
            width: 100%;
            text-align: center;
            background: var(--bg-light);
            border: 1px solid var(--border);
            color: var(--primary);
            padding: 10px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 14px;
        }
        .product-cta:hover {
            background: var(--primary);
            color: #ffffff;
            border-color: var(--primary);
        }

        /* 6. 技术参数对比区 */
        #contrast-specs {
            background-color: var(--bg-dark);
            color: #ffffff;
        }
        .table-responsive {
            overflow-x: auto;
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            background: rgba(255, 255, 255, 0.02);
        }
        .specs-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            font-size: 14px;
        }
        .specs-table th, 
        .specs-table td {
            padding: 18px 24px;
            border-bottom: 1px solid var(--border-dark);
        }
        .specs-table th {
            background: rgba(255, 255, 255, 0.05);
            font-weight: 700;
            color: #ffffff;
        }
        .specs-table td:nth-child(1) {
            font-weight: 600;
            color: #C2D1CB;
            width: 25%;
        }
        .specs-table td:nth-child(2) {
            color: #8E9F98;
            width: 35%;
        }
        .specs-table td:nth-child(3) {
            color: var(--accent);
            font-weight: 600;
            width: 40%;
            background: rgba(0, 208, 132, 0.04);
        }

        /* 7. 工程里程碑与标杆案例 */
        #milestone-cases {
            background: #ffffff;
        }
        .timeline-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .timeline-card {
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            background: #ffffff;
            box-shadow: var(--shadow-sm);
        }
        .timeline-thumb {
            height: 180px;
            overflow: hidden;
        }
        .timeline-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .timeline-body {
            padding: 24px;
        }
        .timeline-phase {
            font-size: 13px;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 6px;
        }
        .timeline-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .timeline-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 8. 用户场景实测 */
        #user-stories {
            background: var(--bg-light);
        }
        .stories-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }
        .story-item {
            background: #ffffff;
            padding: 32px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .story-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 18px;
        }
        .story-category {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(15, 36, 29, 0.06);
            padding: 4px 10px;
            border-radius: 4px;
        }
        .story-stat {
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
        }
        .story-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .story-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 20px;
        }
        .story-footer {
            border-top: 1px solid var(--border);
            padding-top: 16px;
            font-size: 13px;
            color: var(--text-sub);
        }

        /* 9. 关键数据统计条 */
        #stats-strip {
            background: linear-gradient(135deg, var(--primary) 0%, #16362C 100%);
            color: #ffffff;
            padding: 56px 0;
        }
        .stats-wrapper {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }
        .stat-box-val {
            font-size: 40px;
            font-weight: 800;
            color: var(--accent);
            margin-bottom: 8px;
            font-variant-numeric: tabular-nums;
        }
        .stat-box-label {
            font-size: 15px;
            color: #C2D1CB;
            font-weight: 500;
        }

        /* 10. 行业洞察与资讯 */
        #industry-news {
            background: #ffffff;
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .news-card {
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            background: #ffffff;
            transition: all 0.25s ease;
        }
        .news-card:hover {
            border-color: var(--accent);
            transform: translateY(-4px);
        }
        .news-img {
            height: 190px;
            overflow: hidden;
        }
        .news-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-body {
            padding: 24px;
        }
        .news-meta {
            font-size: 12px;
            color: var(--text-sub);
            margin-bottom: 8px;
        }
        .news-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .news-summary {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 11. 交付流程与工艺规范 */
        #delivery-process {
            background: var(--bg-light);
        }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .step-item {
            background: #ffffff;
            padding: 28px 24px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            position: relative;
        }
        .step-number {
            font-size: 24px;
            font-weight: 800;
            color: var(--accent);
            margin-bottom: 14px;
            display: block;
        }
        .step-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .step-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 12. 认证体系与平台保障 */
        #platform-security {
            background: #ffffff;
        }
        .cert-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .cert-card {
            border: 1px solid var(--border);
            padding: 24px 20px;
            border-radius: var(--radius-sm);
            text-align: center;
            background: var(--bg-light);
        }
        .cert-code {
            font-size: 18px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 6px;
        }
        .cert-name {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 13. FAQ 手风琴解答区 */
        #faq-accordion {
            background: var(--bg-light);
        }
        .faq-wrapper {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            background: #ffffff;
            overflow: hidden;
            transition: all 0.25s ease;
        }
        .faq-item details {
            width: 100%;
        }
        .faq-item summary {
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 700;
            color: var(--primary);
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: "+";
            font-size: 20px;
            font-weight: 600;
            color: var(--text-sub);
            transition: transform 0.25s ease;
        }
        .faq-item details[open] summary::after {
            content: "−";
            color: var(--accent);
        }
        .faq-answer {
            padding: 0 24px 20px 24px;
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-muted);
            border-top: 1px solid transparent;
        }
        .faq-item details[open] .faq-answer {
            border-top-color: var(--border);
            background-color: #FAFCFB;
        }

        /* 14. 转化表单与技术需求收口 */
        #conversion-cta {
            background: linear-gradient(135deg, #091410 0%, #0F241D 100%);
            color: #ffffff;
            padding: 80px 0;
        }
        .cta-box {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .cta-info h2 {
            font-size: clamp(2rem, 3.5vw, 2.6rem);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            color: #ffffff;
        }
        .cta-info p {
            font-size: 15px;
            color: #A0B3AA;
            line-height: 1.8;
            margin-bottom: 30px;
        }
        .cta-direct-contact {
            display: flex;
            flex-direction: column;
            gap: 12px;
            font-size: 14px;
            color: #ffffff;
        }
        .cta-form {
            background: #ffffff;
            padding: 36px;
            border-radius: var(--radius-md);
            color: var(--text-main);
            box-shadow: var(--shadow-lg);
        }
        .cta-form-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 20px;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 6px;
        }
        .form-control {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-family: inherit;
            outline: none;
            transition: border-color 0.25s ease;
        }
        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(15, 36, 29, 0.1);
        }
        textarea.form-control {
            resize: vertical;
            min-height: 80px;
        }
        .form-submit-btn {
            width: 100%;
            background-color: var(--accent);
            color: var(--primary);
            border: none;
            padding: 14px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.25s ease;
        }
        .form-submit-btn:hover {
            background-color: var(--accent-hover);
        }

        /* 统一页脚 */
        .site-footer {
            background-color: var(--bg-dark);
            color: #8E9F98;
            padding: 70px 0 30px;
            border-top: 1px solid var(--border-dark);
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 50px;
        }
        .footer-col-title {
            font-size: 16px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 20px;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .footer-desc {
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-dark);
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
        }

        /* 响应式断点控制 */
        @media (max-width: 1024px) {
            .metrics-grid,
            .cert-grid,
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .advantages-grid,
            .product-grid,
            .timeline-grid,
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .intro-wrapper,
            .cta-box {
                grid-template-columns: 1fr;
                gap: 40px;
            }
        }

        @media (max-width: 768px) {
            .top-bar {
                display: none;
            }
            .nav-menu {
                display: none;
            }
            .metrics-grid,
            .advantages-grid,
            .product-grid,
            .timeline-grid,
            .stories-grid,
            .news-grid,
            .process-steps,
            .cert-grid,
            .stats-wrapper {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 16px;
                text-align: center;
            }
            section {
                padding: 60px 0;
            }
            .hero-actions {
                flex-direction: column;
            }
            .btn {
                width: 100%;
            }
        }