/* roulang page: index */
:root {
      --primary: #1A5F7A;
      --secondary: #E85D04;
      --bg: #F5F7FA;
      --card-bg: #FFFFFF;
      --text: #1E293B;
      --text-light: #64748B;
      --border: #E2E8F0;
      --success: #10B981;
      --danger: #EF4444;
      --radius-sm: 10px;
      --radius: 16px;
      --radius-lg: 20px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
      --shadow-hover: 0 10px 25px rgba(0,0,0,0.08), 0 4px 10px rgba(0,0,0,0.04);
      --font-cn: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
      --font-en: "Inter", "Segoe UI", system-ui, sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-cn);
      color: var(--text);
      background-color: var(--bg);
      margin: 0;
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, .font-en {
      font-family: var(--font-cn);
    }

    .font-en, .metric-number {
      font-family: var(--font-en);
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: color 0.2s;
    }
    a:hover {
      color: var(--secondary);
    }

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

    .container-custom {
      max-width: 1140px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 导航栏 */
    .navbar-custom {
      background-color: #FFFFFF;
      box-shadow: 0 1px 3px rgba(0,0,0,0.05);
      padding: 12px 0;
      position: sticky;
      top: 0;
      z-index: 1020;
      border-bottom: 1px solid var(--border);
    }
    .navbar-custom .container-custom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
    }
    .logo {
      font-size: 22px;
      font-weight: 800;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 6px;
      text-decoration: none;
      white-space: nowrap;
    }
    .logo i {
      font-size: 26px;
      color: var(--secondary);
    }
    .search-wrapper {
      position: relative;
      flex: 1;
      max-width: 360px;
      margin: 0 20px;
    }
    .search-wrapper input {
      width: 100%;
      height: 46px;
      border-radius: 30px;
      border: 1px solid var(--border);
      background: #F1F5F9;
      padding-left: 42px;
      padding-right: 18px;
      font-size: 15px;
      transition: all 0.2s;
      outline: none;
    }
    .search-wrapper input:focus {
      border-color: var(--primary);
      background: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(26,95,122,0.1);
    }
    .search-wrapper .search-icon {
      position: absolute;
      left: 16px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--text-light);
      font-size: 16px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      font-weight: 500;
      font-size: 15px;
    }
    .nav-links a {
      color: var(--text);
      transition: color 0.2s;
      padding: 6px 0;
      border-bottom: 2px solid transparent;
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--secondary);
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 26px;
      color: var(--text);
    }
    @media (max-width: 991px) {
      .search-wrapper {
        order: 3;
        margin: 12px 0 0 0;
        max-width: 100%;
      }
      .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 16px;
        padding: 20px 0 8px;
      }
      .mobile-toggle {
        display: block;
      }
      .nav-links.show {
        display: flex;
      }
    }

    /* 首屏 */
    .hero {
      background: linear-gradient(135deg, #E8F0F8 0%, #F5F7FA 60%, #FFFFFF 100%);
      padding: 80px 0 100px;
    }
    .hero .container-custom {
      display: flex;
      align-items: center;
      gap: 50px;
    }
    .hero-left h1 {
      font-size: 36px;
      font-weight: 700;
      line-height: 1.2;
      color: var(--text);
      margin-bottom: 18px;
    }
    .hero-left .sub {
      font-size: 18px;
      color: var(--text-light);
      margin-bottom: 30px;
    }
    .btn-primary-custom {
      background: var(--secondary);
      color: white;
      font-weight: 600;
      font-size: 16px;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      border: none;
      transition: all 0.25s;
      display: inline-block;
      text-decoration: none;
    }
    .btn-primary-custom:hover {
      background: #D14D00;
      transform: scale(1.03);
      color: white;
    }
    .hero-metrics {
      display: flex;
      gap: 24px;
      flex-wrap: wrap;
    }
    .metric-mini {
      background: white;
      padding: 18px 24px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
      text-align: center;
      min-width: 120px;
    }
    .metric-mini .number {
      font-size: 36px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
    }
    .metric-mini .label {
      font-size: 14px;
      color: var(--text-light);
      margin-top: 6px;
    }
    @media (max-width: 768px) {
      .hero .container-custom {
        flex-direction: column;
      }
      .hero-left h1 {
        font-size: 28px;
      }
      .hero-metrics {
        justify-content: center;
      }
    }

    /* 通用板块 */
    .section {
      padding: 100px 0;
    }
    .section h2 {
      font-size: 28px;
      font-weight: 700;
      margin-bottom: 16px;
      text-align: center;
    }
    .section .subtitle {
      color: var(--text-light);
      text-align: center;
      margin-bottom: 48px;
      font-size: 16px;
    }
    @media (max-width: 768px) {
      .section {
        padding: 60px 0;
      }
      .section h2 {
        font-size: 24px;
      }
    }

    /* 数据看板 */
    .data-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .data-card {
      background: var(--card-bg);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: all 0.25s;
    }
    .data-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .data-card .icon {
      font-size: 36px;
      color: var(--secondary);
      margin-bottom: 16px;
    }
    .data-card .metric-number {
      font-size: 42px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
    }
    .data-card .tag {
      font-size: 15px;
      color: var(--text-light);
      margin-top: 10px;
    }
    @media (max-width: 991px) {
      .data-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 576px) {
      .data-grid { grid-template-columns: 1fr; }
    }

    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--card-bg);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s;
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .service-icon {
      width: 64px;
      height: 64px;
      background: #E8F0F8;
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      overflow: hidden;
    }
    .service-icon img {
      width: 40px;
      height: 40px;
      object-fit: contain;
    }
    .service-card h3 {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 10px;
    }
    .service-card .desc {
      font-size: 14px;
      color: var(--text-light);
      margin-bottom: 16px;
    }
    .service-list {
      list-style: none;
      padding: 0;
      margin: 0 0 20px;
      font-size: 13px;
      color: var(--text);
    }
    .service-list li::before {
      content: "●";
      color: var(--primary);
      margin-right: 8px;
    }
    .service-link {
      margin-top: auto;
      font-weight: 500;
    }
    @media (max-width: 991px) {
      .services-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 576px) {
      .services-grid { grid-template-columns: 1fr; }
    }

    /* 对比 */
    .comparison-row {
      display: flex;
      align-items: center;
      gap: 30px;
    }
    .compare-card {
      flex: 1;
      background: #F1F5F9;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 32px;
    }
    .compare-card.after {
      background: #FFFFFF;
      border-left: 6px solid var(--success);
    }
    .vs-badge {
      background: var(--primary);
      color: white;
      width: 56px;
      height: 56px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 18px;
      box-shadow: 0 6px 14px rgba(0,0,0,0.15);
      flex-shrink: 0;
    }
    .compare-item {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 14px;
      font-size: 15px;
    }
    .check { color: var(--success); }
    .cross { color: var(--danger); }
    @media (max-width: 768px) {
      .comparison-row {
        flex-direction: column;
      }
      .vs-badge {
        margin: 10px 0;
      }
    }

    /* FAQ */
    .accordion-custom .accordion-item {
      border: 1px solid var(--border);
      border-radius: 12px;
      margin-bottom: 12px;
      background: white;
    }
    .accordion-custom .accordion-button {
      font-weight: 600;
      font-size: 17px;
      padding: 18px 24px;
      background: white;
      color: var(--text);
      box-shadow: none;
      border-radius: 12px;
    }
    .accordion-custom .accordion-button:not(.collapsed) {
      background-color: #F8FAFC;
      color: var(--primary);
    }
    .accordion-custom .accordion-body {
      font-size: 15px;
      color: var(--text);
      padding: 18px 24px;
    }

    /* 转化表单 */
    .cta-block {
      background: #EEF2F6;
      border-radius: var(--radius-lg);
      padding: 48px;
      display: flex;
      align-items: center;
      gap: 40px;
    }
    .cta-left h3 {
      font-size: 26px;
      font-weight: 700;
    }
    .cta-form {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      align-items: center;
    }
    .cta-form input {
      height: 48px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border);
      padding: 0 16px;
      font-size: 15px;
      min-width: 180px;
      flex: 1;
    }
    .cta-form input:focus {
      border-color: var(--primary);
      outline: none;
      box-shadow: 0 0 0 3px rgba(26,95,122,0.1);
    }
    @media (max-width: 768px) {
      .cta-block {
        flex-direction: column;
        padding: 28px;
      }
      .cta-form {
        flex-direction: column;
        width: 100%;
      }
    }

    /* 页脚 */
    .footer {
      background: #1E293B;
      color: #CBD5E1;
      padding: 60px 0 20px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
    }
    .footer a {
      color: #CBD5E1;
      text-decoration: none;
    }
    .footer a:hover { color: var(--secondary); }
    .social-icons i {
      font-size: 22px;
      margin-right: 16px;
    }
    .copyright {
      text-align: center;
      padding-top: 30px;
      font-size: 13px;
      color: #94A3B8;
      border-top: 1px solid #334155;
      margin-top: 40px;
    }
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }

    .backpic-hero {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      border-radius: 20px;
      height: 220px;
      width: 100%;
      max-width: 400px;
    }