/* roulang page: index */
:root {
      --primary: #00D26A;
      --primary-hover: #00b359;
      --accent-dark: #0F172A;
      --accent-purple: #6366F1;
      --bg-light: #FAFAFC;
      --bg-alt: #F1F5F9;
      --bg-dark: #0B0F19;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --text-light: #F8FAFC;
      --text-light-muted: #94A3B8;
      --border-color: #E2E8F0;
      --border-dark: #1E293B;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-hover: 0 12px 20px -5px rgba(0, 0, 0, 0.1);
      --transition: all 0.25s 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, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.6;
      -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: inherit;
    }

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

    /* 顶部双行导航 */
    .top-status-bar {
      background: var(--accent-dark);
      color: var(--text-light-muted);
      font-size: 13px;
      padding: 6px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

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

    .status-indicator {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .pulse-dot {
      width: 8px;
      height: 8px;
      background-color: var(--primary);
      border-radius: 50%;
      box-shadow: 0 0 0 0 rgba(0, 210, 106, 0.7);
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(0, 210, 106, 0.7);
      }
      70% {
        transform: scale(1);
        box-shadow: 0 0 0 6px rgba(0, 210, 106, 0);
      }
      100% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(0, 210, 106, 0);
      }
    }

    .status-links {
      display: flex;
      gap: 20px;
    }

    .status-links a:hover {
      color: var(--primary);
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      background: rgba(255, 255, 255, 0.92);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }

    .navbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 19px;
      font-weight: 700;
      color: var(--accent-dark);
      letter-spacing: -0.3px;
    }

    .brand-logo-icon {
      width: 32px;
      height: 32px;
      background: var(--accent-dark);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
    }

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

    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-main);
    }

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

    .nav-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      background-color: var(--primary);
      color: #052e16;
      font-weight: 600;
      font-size: 14px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
    }

    .nav-cta:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 4px 12px rgba(0, 210, 106, 0.3);
      color: #021a0c;
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .mobile-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--accent-dark);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* 按钮通用 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 26px;
      border-radius: var(--radius-sm);
      font-size: 15px;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
    }

    .btn-primary {
      background: var(--primary);
      color: #052e16;
    }

    .btn-primary:hover {
      background: var(--primary-hover);
      box-shadow: 0 6px 16px rgba(0, 210, 106, 0.35);
      transform: translateY(-1px);
    }

    .btn-secondary {
      background: rgba(255, 255, 255, 0.08);
      color: var(--text-light);
      border-color: rgba(255, 255, 255, 0.2);
    }

    .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.15);
      border-color: rgba(255, 255, 255, 0.4);
    }

    .btn-outline-dark {
      background: transparent;
      border-color: var(--border-color);
      color: var(--text-main);
    }

    .btn-outline-dark:hover {
      border-color: var(--accent-dark);
      background: var(--bg-alt);
    }

    /* 板块通用 */
    section {
      padding: 90px 0;
      position: relative;
    }

    .section-header {
      margin-bottom: 56px;
    }

    .section-header.text-center {
      text-align: center;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

    .badge-tag {
      display: inline-block;
      padding: 4px 12px;
      background: rgba(0, 210, 106, 0.12);
      color: #008744;
      font-size: 13px;
      font-weight: 600;
      border-radius: 50px;
      margin-bottom: 14px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 34px;
      font-weight: 800;
      line-height: 1.25;
      color: var(--accent-dark);
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 1. Hero 板块：众筹预热目标进度环与参数档位 */
    .hero-section {
      background: linear-gradient(135deg, rgba(11, 15, 25, 0.94) 0%, rgba(15, 23, 42, 0.96) 100%), url('/assets/images/e460007c7e72700d.png') center/cover no-repeat;
      color: var(--text-light);
      padding: 110px 0 90px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 48px;
      align-items: center;
    }

    .hero-content h1 {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-content h1 span {
      color: var(--primary);
    }

    .hero-content p {
      font-size: 17px;
      color: var(--text-light-muted);
      line-height: 1.75;
      margin-bottom: 32px;
    }

    .hero-actions {
      display: flex;
      gap: 16px;
      margin-bottom: 40px;
    }

    .hero-metrics-strip {
      display: flex;
      gap: 32px;
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.12);
    }

    .metric-chip .val {
      font-size: 24px;
      font-weight: 700;
      color: var(--primary);
    }

    .metric-chip .lbl {
      font-size: 13px;
      color: var(--text-light-muted);
      margin-top: 2px;
    }

    /* 众筹/预热支持环形卡片 */
    .hero-progress-box {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-md);
      padding: 32px;
      backdrop-filter: blur(10px);
    }

    .progress-box-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 24px;
    }

    .circle-chart-wrapper {
      display: flex;
      align-items: center;
      gap: 20px;
      margin-bottom: 24px;
    }

    .circle-stat {
      width: 100px;
      height: 100px;
      border-radius: 50%;
      background: conic-gradient(var(--primary) 0% 92%, rgba(255, 255, 255, 0.1) 92% 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
    }

    .circle-stat::after {
      content: "92%";
      position: absolute;
      width: 76px;
      height: 76px;
      border-radius: 50%;
      background: #0d1322;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 700;
      color: var(--text-light);
    }

    .circle-text h4 {
      font-size: 16px;
      margin-bottom: 4px;
      color: var(--text-light);
    }

    .circle-text p {
      font-size: 13px;
      color: var(--text-light-muted);
      margin-bottom: 0;
    }

    .tier-cards {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .tier-item {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-sm);
      padding: 12px 16px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .tier-item:hover {
      border-color: var(--primary);
    }

    .tier-name {
      font-size: 14px;
      font-weight: 600;
    }

    .tier-spec {
      font-size: 12px;
      color: var(--text-light-muted);
    }

    .tier-price {
      font-size: 15px;
      font-weight: 700;
      color: var(--primary);
    }

    /* 2. 产线能力（核心技术底座） */
    .section-overview {
      background: #FFFFFF;
    }

    .overview-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }

    .overview-visual {
      position: relative;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
    }

    .overview-visual img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }

    .overview-info h3 {
      font-size: 26px;
      font-weight: 700;
      margin-bottom: 18px;
      color: var(--accent-dark);
    }

    .overview-info p {
      color: var(--text-muted);
      margin-bottom: 24px;
      line-height: 1.7;
    }

    .feature-points {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .feature-point {
      display: flex;
      gap: 12px;
      align-items: flex-start;
      font-size: 15px;
      color: var(--text-main);
    }

    .feature-point svg {
      width: 20px;
      height: 20px;
      stroke: var(--primary);
      flex-shrink: 0;
      margin-top: 2px;
    }

    /* 3. 参数表（核心技术优势 6网格卡片） */
    .section-advantages {
      background: var(--bg-alt);
    }

    .grid-6 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .advantage-card {
      background: #FFFFFF;
      padding: 30px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .advantage-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--primary);
    }

    .card-icon {
      width: 46px;
      height: 46px;
      border-radius: var(--radius-sm);
      background: rgba(0, 210, 106, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: #008744;
    }

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

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

    /* 4. 案例现场（产品矩阵与接口示例） */
    .section-products {
      background: #FFFFFF;
    }

    .product-cards {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .product-card:hover {
      box-shadow: var(--shadow-hover);
      border-color: var(--accent-purple);
    }

    .product-thumb {
      height: 180px;
      overflow: hidden;
    }

    .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: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }

    .product-tag {
      font-size: 12px;
      font-weight: 600;
      color: var(--accent-purple);
      text-transform: uppercase;
      margin-bottom: 8px;
    }

    .product-body h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--accent-dark);
    }

    .product-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .code-snippet {
      background: #0B0F19;
      color: #A5B4FC;
      font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
      font-size: 12px;
      padding: 12px;
      border-radius: var(--radius-sm);
      margin-top: auto;
      overflow-x: auto;
      line-height: 1.4;
      border: 1px solid rgba(255, 255, 255, 0.08);
    }

    .code-snippet code {
      display: block;
      white-space: pre;
    }

    /* 5. 实战方案（深色高对比板块） */
    .section-solutions {
      background: var(--bg-dark);
      color: var(--text-light);
    }

    .section-solutions .section-title {
      color: var(--text-light);
    }

    .section-solutions .section-desc {
      color: var(--text-light-muted);
    }

    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .solution-box {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      transition: var(--transition);
    }

    .solution-box:hover {
      background: rgba(255, 255, 255, 0.06);
      border-color: var(--primary);
    }

    .solution-icon-ring {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: rgba(99, 102, 241, 0.15);
      color: var(--accent-purple);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
    }

    .solution-box h3 {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 14px;
      color: var(--text-light);
    }

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

    /* 6. 交付流程（企业集成与架构拆解） */
    .section-delivery {
      background: var(--bg-alt);
    }

    .delivery-flow {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .flow-step {
      background: #FFFFFF;
      padding: 28px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      position: relative;
    }

    .step-badge {
      width: 32px;
      height: 32px;
      background: var(--accent-dark);
      color: var(--primary);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
      margin-bottom: 16px;
    }

    .flow-step h4 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--accent-dark);
    }

    .flow-step p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 7. 全球关键数据指标条 */
    .section-stats-strip {
      background: var(--accent-dark);
      padding: 50px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .stats-container {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }

    .stat-item .num {
      font-size: 40px;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -1px;
      line-height: 1.1;
    }

    .stat-item .label {
      font-size: 14px;
      color: var(--text-light-muted);
      margin-top: 8px;
    }

    /* 8. 客户与开发者评价墙 */
    .section-reviews {
      background: #FFFFFF;
    }

    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: var(--bg-light);
      padding: 28px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-body {
      font-size: 14px;
      color: var(--text-main);
      line-height: 1.7;
      margin-bottom: 20px;
      position: relative;
    }

    .review-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: #CBD5E1;
      overflow: hidden;
      flex-shrink: 0;
    }

    .author-avatar img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .author-info h5 {
      font-size: 15px;
      font-weight: 700;
      color: var(--accent-dark);
    }

    .author-info span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 9. 资讯与接口生态通知 */
    .section-news {
      background: var(--bg-alt);
    }

    .news-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .news-card {
      background: #FFFFFF;
      padding: 22px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .news-card:hover {
      border-color: var(--accent-dark);
      transform: translateY(-2px);
    }

    .news-date {
      font-size: 12px;
      color: var(--accent-purple);
      font-weight: 600;
      margin-bottom: 8px;
    }

    .news-card h4 {
      font-size: 16px;
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 10px;
      color: var(--accent-dark);
    }

    .news-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 10. 报价阶梯与调用包 */
    .section-pricing {
      background: #FFFFFF;
    }

    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      align-items: stretch;
    }

    .pricing-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 36px 28px;
      background: #FFFFFF;
      display: flex;
      flex-direction: column;
      position: relative;
      transition: var(--transition);
    }

    .pricing-card.featured {
      border-color: var(--primary);
      box-shadow: 0 10px 25px -5px rgba(0, 210, 106, 0.2);
    }

    .pricing-card.featured::before {
      content: "主流推荐方案";
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary);
      color: #052e16;
      font-size: 12px;
      font-weight: 700;
      padding: 2px 14px;
      border-radius: 20px;
    }

    .pricing-name {
      font-size: 20px;
      font-weight: 700;
      color: var(--accent-dark);
      margin-bottom: 6px;
    }

    .pricing-sub {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 24px;
    }

    .pricing-val {
      font-size: 38px;
      font-weight: 800;
      color: var(--accent-dark);
      margin-bottom: 24px;
    }

    .pricing-val span {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-muted);
    }

    .pricing-features {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-bottom: 32px;
      flex-grow: 1;
    }

    .pricing-features li {
      font-size: 14px;
      color: var(--text-main);
      display: flex;
      gap: 10px;
      align-items: center;
    }

    .pricing-features li svg {
      width: 16px;
      height: 16px;
      stroke: var(--primary);
      flex-shrink: 0;
    }

    /* 11. FAQ 手风琴 */
    .section-faq {
      background: var(--bg-alt);
    }

    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 600;
      color: var(--accent-dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-question svg {
      width: 18px;
      height: 18px;
      transition: transform 0.3s ease;
      stroke: var(--text-muted);
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 24px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 0 24px 20px 24px;
    }

    /* 12. 转化区：沙盒试用与工程师连线 */
    .section-cta {
      background: #FFFFFF;
      padding-bottom: 100px;
    }

    .cta-card {
      background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
      border-radius: var(--radius-lg);
      padding: 56px 48px;
      color: var(--text-light);
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }

    .cta-text h2 {
      font-size: 32px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
      color: var(--text-light);
    }

    .cta-text p {
      font-size: 15px;
      color: var(--text-light-muted);
      line-height: 1.7;
    }

    .cta-form {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .cta-input-group {
      display: flex;
      gap: 10px;
    }

    .cta-input {
      flex: 1;
      padding: 12px 16px;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: var(--radius-sm);
      color: var(--text-light);
      font-size: 14px;
      outline: none;
    }

    .cta-input:focus {
      border-color: var(--primary);
      background: rgba(255, 255, 255, 0.12);
    }

    .cta-hint {
      font-size: 12px;
      color: var(--text-light-muted);
    }

    /* 统一页脚 */
    .site-footer {
      background: #070A11;
      color: var(--text-light-muted);
      padding: 70px 0 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 14px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-light);
      margin-bottom: 18px;
      letter-spacing: 0.5px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a:hover {
      color: var(--primary);
    }

    .footer-brand p {
      margin-top: 14px;
      line-height: 1.7;
      color: #64748B;
      font-size: 13px;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      color: #64748B;
    }

    .footer-bottom a {
      color: inherit;
    }

    .footer-bottom a:hover {
      color: var(--text-light);
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .grid-6 {
        grid-template-columns: repeat(2, 1fr);
      }
      .product-cards {
        grid-template-columns: repeat(2, 1fr);
      }
      .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .delivery-flow {
        grid-template-columns: repeat(2, 1fr);
      }
      .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .cta-card {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
      .site-header {
        position: static;
      }
      .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        bottom: 0;
        background: #FFFFFF;
        flex-direction: column;
        padding: 30px 24px;
        align-items: flex-start;
        display: none;
        z-index: 999;
      }
      .nav-menu.open {
        display: flex;
      }
      .mobile-toggle {
        display: block;
      }
      .overview-grid {
        grid-template-columns: 1fr;
      }
      .grid-6 {
        grid-template-columns: 1fr;
      }
      .product-cards {
        grid-template-columns: 1fr;
      }
      .solutions-grid {
        grid-template-columns: 1fr;
      }
      .stats-container {
        grid-template-columns: repeat(2, 1fr);
      }
      .reviews-grid {
        grid-template-columns: 1fr;
      }
      .pricing-grid {
        grid-template-columns: 1fr;
      }
      .hero-content h1 {
        font-size: 32px;
      }
      .section-title {
        font-size: 26px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
      .top-status-bar {
        display: none;
      }
      .cta-input-group {
        flex-direction: column;
      }
    }