/* roulang page: index */
:root {
      --primary: #0F766E;
      --primary-hover: #0d655e;
      --primary-light: #f0fdfa;
      --accent: #10B981;
      --accent-hover: #059669;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --bg-page: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-dark: #0F172A;
      --bg-dark-card: #1E293B;
      --border-color: #E2E8F0;
      --border-dark: rgba(255, 255, 255, 0.08);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
      --shadow-lg: 0 12px 32px -4px rgba(15, 23, 42, 0.12);
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    }

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

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

    body {
      font-family: var(--font-stack);
      color: var(--text-main);
      background-color: var(--bg-page);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

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

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

    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;
    }

    /* 顶部通栏与主导航 */
    .top-utility-bar {
      background-color: var(--bg-dark);
      color: #94A3B8;
      font-size: 13px;
      padding: 8px 0;
      border-bottom: 1px solid var(--border-dark);
    }
    .top-utility-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .utility-tag {
      color: #38BDF8;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .main-nav-wrapper {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: box-shadow 0.3s;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .nav-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 20px;
      color: var(--primary);
      letter-spacing: -0.01em;
    }
    .nav-logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 900;
      font-size: 18px;
    }
    .nav-links {
      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);
    }
    .nav-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background-color: var(--primary);
      color: #fff;
      padding: 10px 22px;
      border-radius: 999px;
      font-weight: 600;
      font-size: 14px;
      box-shadow: 0 2px 10px rgba(15, 118, 110, 0.25);
    }
    .nav-cta:hover {
      background-color: var(--primary-hover);
      transform: translateY(-1px);
    }

    /* 移动端菜单触发 */
    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: none;
      font-size: 24px;
      color: var(--text-main);
      cursor: pointer;
    }

    /* Hero 结构 */
    .hero-section {
      position: relative;
      background: #0B132B url('/assets/images/f72dfbc6a66dcdf1.webp') center/cover no-repeat;
      padding: 80px 0 100px;
      color: #FFFFFF;
      overflow: hidden;
    }
    .hero-overlay {
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(15, 118, 110, 0.82) 100%);
    }
    .hero-container {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-badge-wrap {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(16, 185, 129, 0.2);
      border: 1px solid rgba(16, 185, 129, 0.4);
      padding: 6px 14px;
      border-radius: 999px;
      font-size: 13px;
      color: #6EE7B7;
      margin-bottom: 24px;
      backdrop-filter: blur(4px);
    }
    .hero-title {
      font-size: 44px;
      line-height: 1.25;
      font-weight: 800;
      margin-bottom: 20px;
      letter-spacing: -0.02em;
    }
    .hero-title span {
      background: linear-gradient(90deg, #5EEAD4, #A7F3D0);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 17px;
      line-height: 1.8;
      color: #CBD5E1;
      margin-bottom: 36px;
    }
    .hero-input-box {
      background: rgba(255, 255, 255, 0.1);
      backdrop-filter: blur(16px);
      border: 1px solid rgba(255, 255, 255, 0.2);
      padding: 16px;
      border-radius: var(--radius-lg);
      display: grid;
      grid-template-columns: 1.2fr 1fr 1fr auto;
      gap: 12px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    }
    .hero-input-group label {
      display: block;
      font-size: 11px;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      color: #94A3B8;
      margin-bottom: 4px;
    }
    .hero-input-group input, .hero-input-group select {
      width: 100%;
      background: rgba(15, 23, 42, 0.6);
      border: 1px solid rgba(255, 255, 255, 0.15);
      color: #FFF;
      padding: 10px 12px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      outline: none;
    }
    .hero-input-group input:focus, .hero-input-group select:focus {
      border-color: var(--accent);
    }
    .hero-btn-submit {
      align-self: flex-end;
      background: linear-gradient(135deg, var(--accent), #059669);
      color: #FFF;
      border: none;
      padding: 12px 24px;
      border-radius: var(--radius-sm);
      font-weight: 700;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 6px;
      height: 42px;
      white-space: nowrap;
      transition: all 0.2s;
    }
    .hero-btn-submit:hover {
      filter: brightness(1.1);
      transform: translateY(-2px);
    }

    /* 首屏右侧 UI 看板模拟 */
    .hero-dashboard-mockup {
      background: rgba(15, 23, 42, 0.8);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-lg);
      padding: 24px;
      backdrop-filter: blur(20px);
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    }
    .mockup-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      padding-bottom: 14px;
      margin-bottom: 18px;
    }
    .mockup-header-title {
      font-weight: 600;
      font-size: 15px;
      color: #E2E8F0;
    }
    .mockup-status-dot {
      display: inline-block;
      width: 8px;
      height: 8px;
      background: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 10px var(--accent);
    }
    .mockup-timeline-item {
      display: flex;
      gap: 16px;
      margin-bottom: 16px;
      position: relative;
    }
    .mockup-time {
      font-size: 13px;
      color: #38BDF8;
      font-weight: 600;
      width: 50px;
    }
    .mockup-card {
      background: rgba(30, 41, 59, 0.7);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-sm);
      padding: 10px 14px;
      flex: 1;
    }
    .mockup-card h4 {
      font-size: 13px;
      color: #F8FAFC;
      margin-bottom: 2px;
    }
    .mockup-card p {
      font-size: 12px;
      color: #94A3B8;
      line-height: 1.4;
    }

    /* 模块通用样式 */
    .section-spacing {
      padding: 90px 0;
    }
    .section-head {
      margin-bottom: 48px;
    }
    .section-head.center {
      text-align: center;
      max-width: 720px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-pill {
      display: inline-block;
      background: var(--primary-light);
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 999px;
      margin-bottom: 12px;
      letter-spacing: 0.04em;
    }
    .section-pill.dark {
      background: rgba(16, 185, 129, 0.15);
      color: #34D399;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.35;
      letter-spacing: -0.01em;
      margin-bottom: 16px;
    }
    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 1. 痛点唤醒区 */
    .pain-points-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .pain-item {
      display: flex;
      gap: 18px;
      margin-bottom: 28px;
    }
    .pain-num {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: #FEE2E2;
      color: #DC2626;
      font-weight: 800;
      font-size: 18px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }
    .pain-content h3 {
      font-size: 18px;
      font-weight: 700;
      color: #0F172A;
      margin-bottom: 6px;
    }
    .pain-content p {
      font-size: 15px;
      color: var(--text-muted);
    }
    .pain-contrast-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-md);
      position: relative;
    }
    .contrast-badge {
      position: absolute;
      top: -14px;
      right: 24px;
      background: #EF4444;
      color: #FFF;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 999px;
    }
    .contrast-bar {
      margin-bottom: 20px;
    }
    .contrast-bar-label {
      display: flex;
      justify-content: space-between;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 6px;
    }
    .bar-bg {
      height: 8px;
      background: #F1F5F9;
      border-radius: 999px;
      overflow: hidden;
    }
    .bar-fill {
      height: 100%;
      border-radius: 999px;
    }
    .bar-fill.red {
      width: 88%;
      background: #EF4444;
    }
    .bar-fill.green {
      width: 12%;
      background: var(--accent);
    }

    /* 2. 方案介绍大卡图文 */
    .about-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      display: grid;
      grid-template-columns: 1fr 1fr;
      box-shadow: var(--shadow-md);
    }
    .about-box-content {
      padding: 48px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .about-metrics {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-top: 32px;
      padding-top: 24px;
      border-top: 1px solid var(--border-color);
    }
    .about-metric-item h4 {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 2px;
    }
    .about-metric-item p {
      font-size: 13px;
      color: var(--text-muted);
    }
    .about-box-img {
      position: relative;
    }
    .about-box-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    /* 3. 核心功能 6 卡片网格 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      position: relative;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: var(--primary);
    }
    .feature-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 20px;
    }
    .feature-card h3 {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 4. 精选场景 3 联排 */
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .solution-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: transform 0.3s;
    }
    .solution-card:hover {
      transform: translateY(-4px);
    }
    .solution-img-wrap {
      height: 200px;
      position: relative;
      overflow: hidden;
    }
    .solution-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .solution-card:hover .solution-img-wrap img {
      transform: scale(1.05);
    }
    .solution-content {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .solution-content h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .solution-content p {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 20px;
      flex: 1;
    }
    .solution-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }
    .solution-tag-pill {
      font-size: 12px;
      background: #F1F5F9;
      color: #475569;
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      font-weight: 500;
    }

    /* 5. 智能算法深色区 */
    .philosophy-section {
      background-color: var(--bg-dark);
      color: #FFFFFF;
      padding: 90px 0;
      position: relative;
    }
    .philosophy-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .algo-node-box {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 32px;
    }
    .algo-node {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      padding: 16px;
      background: rgba(15, 23, 42, 0.5);
      border: 1px solid rgba(255, 255, 255, 0.05);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
    }
    .node-icon-circle {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      font-weight: 700;
      flex-shrink: 0;
    }
    .node-info h4 {
      font-size: 15px;
      font-weight: 600;
      color: #F8FAFC;
      margin-bottom: 4px;
    }
    .node-info p {
      font-size: 13px;
      color: #94A3B8;
      line-height: 1.5;
    }

    /* 6. 方法步骤 */
    .steps-wrapper {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
      position: relative;
    }
    .step-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }
    .step-number {
      font-size: 40px;
      font-weight: 900;
      color: #E2E8F0;
      line-height: 1;
      margin-bottom: 16px;
    }
    .step-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .step-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 7. 用户故事瀑布流 */
    .stories-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .story-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .story-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 16px;
    }
    .story-destination {
      font-weight: 700;
      color: var(--primary);
      font-size: 15px;
    }
    .story-time-tag {
      font-size: 12px;
      background: #ECFDF5;
      color: #059669;
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 600;
    }
    .story-quote {
      font-size: 15px;
      color: #334155;
      font-style: italic;
      margin-bottom: 20px;
      line-height: 1.7;
    }
    .story-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #F1F5F9;
      padding-top: 16px;
    }
    .author-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
    }
    .author-meta h4 {
      font-size: 14px;
      font-weight: 600;
    }
    .author-meta p {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 8. 关键数据指标条 */
    .metrics-fullwidth {
      background: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 56px 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-col h3 {
      font-size: 44px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
      font-variant-numeric: tabular-nums;
      letter-spacing: -0.02em;
    }
    .metric-col p {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 9. 用户评价 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .testimonial-card {
      background: #FFFFFF;border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-stars {
      color: #F59E0B;
      font-size: 15px;
      margin-bottom: 14px;
      letter-spacing: 2px;
    }
    .testimonial-text {
      font-size: 14px;
      color: #334155;
      line-height: 1.7;
      margin-bottom: 20px;
      flex: 1;
    }
    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      padding-top: 14px;
      border-top: 1px solid #F1F5F9;
    }
    .user-avatar-placeholder {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }
    .user-info h4 {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
    }
    .user-info p {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 10. 资讯卡片组 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: transform 0.3s ease;
    }
    .news-card:hover {
      transform: translateY(-4px);
    }
    .news-img-box {
      height: 180px;
      overflow: hidden;
    }
    .news-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .news-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }
    .news-meta {
      display: flex;
      justify-content: space-between;
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 10px;
    }
    .news-body h3 {
      font-size: 17px;
      font-weight: 700;
      line-height: 1.45;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .news-body p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 18px;
      flex: 1;
    }
    .news-action {
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 11. FAQ 手风琴 */
    .faq-wrapper {
      max-width: 820px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      overflow: hidden;
      transition: border-color 0.2s;
    }
    .faq-item details {
      width: 100%;
    }
    .faq-item summary {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-item summary::-webkit-details-marker {
      display: none;
    }
    .faq-item summary::after {
      content: "+";
      font-size: 20px;
      font-weight: 400;
      color: var(--text-muted);
      transition: transform 0.2s;
    }
    .faq-item details[open] summary::after {
      content: "−";
      color: var(--primary);
    }
    .faq-content {
      padding: 0 24px 22px;
      font-size: 14px;
      line-height: 1.75;
      color: #475569;
      border-top: 1px solid #F8FAFC;
    }

    /* 12. 沉浸式行动号召区 */
    .cta-card {
      background: linear-gradient(135deg, var(--bg-dark) 0%, #064E3B 100%);
      border-radius: var(--radius-lg);
      padding: 64px 32px;
      text-align: center;
      color: #FFFFFF;
      position: relative;
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }
    .cta-card h2 {
      font-size: 34px;
      font-weight: 800;
      margin-bottom: 16px;
    }
    .cta-card p {
      font-size: 16px;
      color: #CBD5E1;
      max-width: 640px;
      margin: 0 auto 32px;
    }
    .cta-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-main-cta {
      background: var(--accent);
      color: #0F172A;
      font-size: 15px;
      font-weight: 700;
      padding: 13px 32px;
      border-radius: 999px;
      display: inline-flex;
      align-items: center;
      box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
    }
    .btn-main-cta:hover {
      background: #34D399;
      transform: translateY(-2px);
    }
    .btn-secondary-cta {
      background: rgba(255, 255, 255, 0.1);
      border: 1px solid rgba(255, 255, 255, 0.25);
      color: #FFFFFF;
      font-size: 15px;
      font-weight: 600;
      padding: 13px 28px;
      border-radius: 999px;
    }
    .btn-secondary-cta:hover {
      background: rgba(255, 255, 255, 0.2);
    }

    /* 页脚 */
    .site-footer {
      background-color: var(--bg-dark);
      color: #94A3B8;
      font-size: 14px;
      padding: 70px 0 30px;
      border-top: 1px solid var(--border-dark);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1.5fr 1.5fr;
      gap: 48px;
      margin-bottom: 50px;
    }
    .footer-col h4 {
      color: #F8FAFC;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .footer-links-list {
      list-style: none;
    }
    .footer-links-list li {
      margin-bottom: 10px;
    }
    .footer-links-list a:hover {
      color: #38BDF8;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #64748B;
    }
    .footer-bottom a {
      color: #64748B;
    }
    .footer-bottom a:hover {
      color: #94A3B8;
    }

    /* 响应式调整 */
    @media (max-width: 1024px) {
      .hero-container {
        grid-template-columns: 1fr;
      }
      .features-grid, .solutions-grid, .testimonials-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
      }
    }

    @media (max-width: 768px) {
      .top-utility-bar {
        display: none;
      }
      .nav-links, .nav-cta {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        padding: 24px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-lg);
        gap: 18px;
      }
      .hero-title {
        font-size: 30px;
      }
      .hero-input-box {
        grid-template-columns: 1fr;
      }
      .pain-points-grid, .about-box, .philosophy-grid, .steps-wrapper, .stories-grid {
        grid-template-columns: 1fr;
      }
      .features-grid, .solutions-grid, .testimonials-grid, .news-grid {
        grid-template-columns: 1fr;
      }
      .about-box-img {
        height: 240px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .section-spacing {
        padding: 60px 0;
      }
      .hero-section {
        padding: 50px 0 70px;
      }
    }