/* roulang page: index */
:root {
      --primary: #0F4C5C;
      --primary-light: #18687d;
      --primary-dark: #09333e;
      --accent: #E36414;
      --accent-hover: #c9540c;
      --dark-surface: #0A2540;
      --text-main: #1A202C;
      --text-muted: #4A5568;
      --text-light: #718096;
      --bg-body: #FFFFFF;
      --bg-surface: #F7F9FA;
      --bg-card: #FFFFFF;
      --border: #E2E8F0;
      --border-dark: #1E3A5F;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-xl: 24px;
      --shadow-sm: 0 2px 8px rgba(15, 76, 92, 0.04);
      --shadow-card: 0 6px 20px -2px rgba(15, 76, 92, 0.06);
      --shadow-hover: 0 16px 32px -4px rgba(15, 76, 92, 0.12);
      --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-body);
      line-height: 1.65;
      font-size: 16px;
      -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: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部服务栏 */
    .top-bar {
      background: #09212b;
      color: #A0AEC0;
      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;
      flex-wrap: wrap;
      gap: 12px;
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background: #48BB78;
      border-radius: 50%;
      box-shadow: 0 0 8px #48BB78;
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.5; transform: scale(0.9); }
      100% { opacity: 1; transform: scale(1); }
    }
    .top-meta {
      display: flex;
      gap: 20px;
    }

    /* 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);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo-box {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFFFFF;
      font-weight: 800;
      font-size: 18px;
    }
    .nav-menu {
      display: flex;
      list-style: none;
      gap: 32px;
      align-items: center;
    }
    .nav-link {
      font-weight: 500;
      color: var(--text-main);
      font-size: 15px;
      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: var(--accent);
      transition: var(--transition);
    }
    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 11px 24px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 15px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
      min-height: 44px;
      white-space: nowrap;
    }
    .btn-primary {
      background: var(--primary);
      color: #FFFFFF;
    }
    .btn-primary:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
      box-shadow: 0 4px 14px rgba(15, 76, 92, 0.25);
    }
    .btn-accent {
      background: var(--accent);
      color: #FFFFFF;
    }
    .btn-accent:hover {
      background: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 4px 14px rgba(227, 100, 20, 0.3);
    }
    .btn-outline {
      border-color: var(--border);
      background: #FFFFFF;
      color: var(--text-main);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--bg-surface);
    }
    .btn-outline-white {
      border-color: rgba(255, 255, 255, 0.4);
      background: transparent;
      color: #FFFFFF;
    }
    .btn-outline-white:hover {
      border-color: #FFFFFF;
      background: rgba(255, 255, 255, 0.1);
    }

    /* 共通排版与组件 */
    section {
      padding: 80px 0;
      position: relative;
    }
    .section-head {
      margin-bottom: 48px;
      max-width: 780px;
    }
    .section-head.center {
      text-align: center;
      margin-left: auto;
      margin-right: auto;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--accent);
      background: rgba(227, 100, 20, 0.1);
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 14px;
    }
    .section-tag.light {
      background: rgba(255, 255, 255, 0.15);
      color: #FFB380;
    }
    .section-title {
      font-size: 34px;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 16px;
      color: var(--text-main);
    }
    .section-desc {
      font-size: 16px;
      line-height: 1.7;
      color: var(--text-muted);
    }

    /* 1. 首屏 Hero */
    .hero-section {
      position: relative;
      background: linear-gradient(135deg, #092730 0%, #0F4C5C 100%);
      color: #FFFFFF;
      padding: 90px 0 110px;
      overflow: hidden;
    }
    .hero-bg-overlay {
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background-image: url('/assets/images/494660d3964321da.png');
      background-size: cover;
      background-position: center;
      opacity: 0.18;
      pointer-events: none;
    }
    .hero-container {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-h1 {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 22px;
      letter-spacing: -0.5px;
    }
    .hero-h1 span {
      color: #FFA566;
    }
    .hero-summary {
      font-size: 16px;
      line-height: 1.75;
      color: #CBD5E0;
      margin-bottom: 32px;
    }
    .hero-invite-box {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.18);
      backdrop-filter: blur(8px);
      padding: 24px;
      border-radius: var(--radius-lg);
      margin-bottom: 32px;
    }
    .invite-header {
      display: flex;
      justify-content: space-between;
      margin-bottom: 12px;
      font-size: 14px;
      font-weight: 600;
    }
    .invite-progress-bg {
      height: 8px;
      background: rgba(255, 255, 255, 0.15);
      border-radius: 4px;
      overflow: hidden;
      margin-bottom: 14px;
    }
    .invite-progress-fill {
      height: 100%;
      width: 78%;
      background: linear-gradient(90deg, #E36414, #FFA566);
      border-radius: 4px;
    }
    .invite-tip {
      font-size: 13px;
      color: #CBD5E0;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .hero-card-stage {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-xl);
      padding: 28px;
      backdrop-filter: blur(12px);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    }
    .stage-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .stage-item {
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 14px 18px;
      margin-bottom: 12px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .stage-item:last-child {
      margin-bottom: 0;
    }
    .stage-name {
      font-size: 14px;
      font-weight: 600;
    }
    .stage-detail {
      font-size: 12px;
      color: #CBD5E0;
    }
    .stage-status {
      font-size: 12px;
      font-weight: 600;
      color: #48BB78;
      background: rgba(72, 187, 120, 0.15);
      padding: 3px 8px;
      border-radius: 12px;
    }

    /* 2. 亮点特性 */
    .highlights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 32px 28px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .feature-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
      border-color: rgba(15, 76, 92, 0.3);
    }
    .feature-icon-bar {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-md);
      background: rgba(15, 76, 92, 0.08);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 20px;
      margin-bottom: 20px;
    }
    .feature-card h3 {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .feature-card p {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 3. 核心产品套件展台 */
    .section-products {
      background: var(--bg-surface);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .product-box {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .product-box:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .product-img {
      height: 200px;
      width: 100%;
      object-fit: cover;
      background: #E2E8F0;
    }
    .product-body {
      padding: 28px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .product-badge {
      font-size: 12px;
      color: var(--primary);
      font-weight: 700;
      margin-bottom: 10px;
      text-transform: uppercase;
    }
    .product-body h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .product-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
    }
    .product-features {
      list-style: none;
      margin-top: auto;
      margin-bottom: 24px;
    }
    .product-features li {
      font-size: 13px;
      color: var(--text-main);
      padding: 6px 0;
      border-bottom: 1px dashed var(--border);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .product-features li::before {
      content: '✓';
      color: var(--accent);
      font-weight: 700;
    }

    /* 4. 成长进阶路径 */
    .timeline-wrapper {
      position: relative;
      max-width: 900px;
      margin: 0 auto;
    }
    .timeline-wrapper::before {
      content: '';
      position: absolute;
      left: 50%;
      top: 0;
      bottom: 0;
      width: 2px;
      background: var(--border);
      transform: translateX(-50%);
    }
    .timeline-node {
      display: flex;
      justify-content: flex-end;
      padding-right: 50%;
      position: relative;
      margin-bottom: 40px;
    }
    .timeline-node:nth-child(even) {
      justify-content: flex-start;
      padding-right: 0;
      padding-left: 50%;
    }
    .timeline-node:last-child {
      margin-bottom: 0;
    }
    .timeline-dot {
      position: absolute;
      left: 50%;
      top: 18px;
      width: 16px;
      height: 16px;
      background: #FFFFFF;
      border: 4px solid var(--accent);
      border-radius: 50%;
      transform: translateX(-50%);
      z-index: 2;
    }
    .timeline-content {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 24px;
      width: calc(100% - 32px);
      box-shadow: var(--shadow-sm);
    }
    .timeline-phase {
      font-size: 12px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 6px;
    }
    .timeline-content h4 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .timeline-content p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 5. 沉浸式场景架构深色区 */
    .section-dark-stage {
      background-color: var(--dark-surface);
      color: #FFFFFF;
      padding: 90px 0;
    }
    .dark-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .dark-left h2 {
      font-size: 32px;
      font-weight: 700;
      line-height: 1.35;
      margin-bottom: 20px;
    }
    .dark-left p {
      color: #CBD5E0;
      font-size: 15px;
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .dark-stats-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-top: 32px;
    }
    .dark-stat-card {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-md);
      padding: 20px;
    }
    .dark-stat-card .num {
      font-size: 32px;
      font-weight: 800;
      color: #FFA566;
      margin-bottom: 6px;
      font-family: monospace, sans-serif;
    }
    .dark-stat-card .label {
      font-size: 13px;
      color: #CBD5E0;
    }
    .dark-img-wrap {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.15);
      box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    }

    /* 6. 关键数据条 */
    .section-metrics {
      padding: 50px 0;
      background: #FFFFFF;
      border-bottom: 1px solid var(--border);
    }
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-item {
      padding: 16px;
      border-right: 1px solid var(--border);
    }
    .metric-item:last-child {
      border-right: none;
    }
    .metric-val {
      font-size: 38px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 6px;
      letter-spacing: -1px;
    }
    .metric-desc {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-muted);
    }

    /* 7. 集成落地案例 */
    .stories-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }
    .story-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-card);
      display: flex;
      flex-direction: column;
    }
    .story-badge {
      align-self: flex-start;
      font-size: 12px;
      font-weight: 600;
      background: rgba(15, 76, 92, 0.08);
      color: var(--primary);
      padding: 4px 10px;
      border-radius: 4px;
      margin-bottom: 16px;
    }
    .story-card h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .story-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
    }
    .story-meta {
      margin-top: auto;
      padding-top: 16px;
      border-top: 1px solid var(--border);
      display: flex;
      justify-content: space-between;
      font-size: 13px;
      color: var(--text-light);
    }

    /* 8. 合作伙伴与口碑评价 */
    .section-reviews {
      background: var(--bg-surface);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .review-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-sm);
    }
    .review-text {
      font-size: 14px;
      color: var(--text-main);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .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 h5 {
      font-size: 15px;
      font-weight: 700;
    }
    .author-info span {
      font-size: 12px;
      color: var(--text-light);
    }

    /* 9. 技术内幕资讯 */
    .insights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .insight-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .insight-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .insight-date {
      font-size: 12px;
      color: var(--text-light);
      margin-bottom: 8px;
    }
    .insight-body h4 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .insight-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .insight-link {
      margin-top: auto;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 10. 架构与接入 FAQ */
    .faq-wrapper {
      max-width: 820px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
    }
    .faq-question {
      padding: 20px 24px;
      font-weight: 700;
      font-size: 16px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #FFFFFF;
      transition: var(--transition);
      user-select: none;
    }
    .faq-question:hover {
      background: var(--bg-surface);
      color: var(--primary);
    }
    .faq-toggle {
      font-size: 20px;
      font-weight: 400;
      color: var(--text-light);
      transition: var(--transition);
    }
    .faq-answer {
      padding: 0 24px 20px;
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
      display: block;
    }

    /* 11. 服务保障与合规承诺条 */
    .section-guarantee {
      background: #FAF8F5;
      border-top: 1px solid #EFEAE4;
      border-bottom: 1px solid #EFEAE4;
      padding: 60px 0;
    }
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .guarantee-card {
      text-align: center;
      padding: 20px 16px;
    }
    .guarantee-card .icon {
      font-size: 28px;
      margin-bottom: 12px;
      display: inline-block;
    }
    .guarantee-card h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .guarantee-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 12. 底部投递与接入转化区 */
    .section-cta {
      background: linear-gradient(135deg, var(--primary) 0%, #082D36 100%);
      color: #FFFFFF;
      padding: 80px 0;
    }
    .cta-card {
      max-width: 860px;
      margin: 0 auto;
      text-align: center;
    }
    .cta-card h2 {
      font-size: 34px;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .cta-card p {
      font-size: 16px;
      color: #CBD5E0;
      margin-bottom: 36px;
      max-width: 680px;
      margin-left: auto;
      margin-right: auto;
    }
    .cta-form {
      display: grid;
      grid-template-columns: 1fr 1fr auto;
      gap: 12px;
      max-width: 680px;
      margin: 0 auto 20px;
    }
    .cta-input {
      padding: 13px 18px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.25);
      background: rgba(255, 255, 255, 0.1);
      color: #FFFFFF;
      font-size: 14px;
      outline: none;
    }
    .cta-input::placeholder {
      color: #A0AEC0;
    }
    .cta-input:focus {
      border-color: #FFFFFF;
      background: rgba(255, 255, 255, 0.18);
    }
    .privacy-tip {
      font-size: 13px;
      color: #A0AEC0;
    }

    /* 工业级页脚 */
    .site-footer {
      background: #061820;
      color: #A0AEC0;
      padding: 70px 0 30px;
      font-size: 14px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 0.9fr 0.9fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-col h4 {
      color: #FFFFFF;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 20px;
    }
    .footer-col p {
      font-size: 14px;
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: #FFFFFF;
    }
    .contact-line {
      display: flex;
      flex-direction: column;
      gap: 6px;
      font-size: 13px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
    }
    .footer-meta-links {
      display: flex;
      gap: 20px;
    }

    /* 移动端固定底栏 */
    .mobile-sticky-bar {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      background: #FFFFFF;
      padding: 10px 16px;
      box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.08);
      z-index: 999;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border);
    }
    .mobile-sticky-phone {
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      text-align: center;
    }
    .mobile-sticky-btn {
      flex: 1;
      height: 44px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: var(--accent);
      color: #FFFFFF;
      font-weight: 700;
      border-radius: var(--radius-sm);
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .highlights-grid,
      .products-grid,
      .reviews-grid,
      .insights-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .guarantee-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .dark-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      body {
        padding-bottom: 64px;
      }
      .top-bar {
        display: none;
      }
      .nav-menu {
        display: none;
      }
      .hero-h1 {
        font-size: 32px;
      }
      .section-title {
        font-size: 26px;
      }
      .highlights-grid,
      .products-grid,
      .reviews-grid,
      .insights-grid,
      .stories-grid,
      .metrics-bar,
      .guarantee-grid,
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .metric-item {
        border-right: none;
        border-bottom: 1px solid var(--border);
        padding: 16px 0;
      }
      .metric-item:last-child {
        border-bottom: none;
      }
      .cta-form {
        grid-template-columns: 1fr;
      }
      .timeline-wrapper::before {
        left: 20px;
      }
      .timeline-node {
        justify-content: flex-start;
        padding-right: 0;
        padding-left: 48px;
      }
      .timeline-node:nth-child(even) {
        padding-left: 48px;
      }
      .timeline-dot {
        left: 20px;
      }
      .timeline-content {
        width: 100%;
      }
      .mobile-sticky-bar {
        display: flex;
      }
    }