/* roulang page: index */
:root {
      --deep-teal: #1A5F7A;
      --warm-gold: #F4A261;
      --gold-hover: #E08D4A;
      --dark-abyss: #0B2B3B;
      --body-bg: #FAFBFD;
      --card-bg: #FFFFFF;
      --text-primary: #4A5568;
      --text-muted: #718096;
      --border-light: #E2E8F0;
      --hero-gradient-start: #F0F5F8;
      --shadow-sm: 0 4px 20px rgba(26, 95, 122, 0.08);
      --shadow-hover: 0 8px 30px rgba(26, 95, 122, 0.15);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-search: 24px;
      --transition: all 0.25s ease;
      --font-stack: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", "Inter", "Segoe UI", sans-serif;
    }

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

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

    img {
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: var(--radius-card);
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

    h1, h2, h3, h4 {
      font-weight: 600;
      line-height: 1.3;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航栏 - 搜索主导 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: #FFFFFF;
      box-shadow: 0 1px 6px rgba(0, 0, 0, 0.05);
      padding: 12px 0;
    }

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

    .logo {
      font-size: 26px;
      font-weight: 700;
      color: var(--deep-teal);
      letter-spacing: 1px;
      white-space: nowrap;
    }
    .logo span {
      color: var(--warm-gold);
    }

    .search-wrapper {
      flex: 1;
      max-width: 420px;
      margin: 0 30px;
      position: relative;
    }

    .search-input {
      width: 100%;
      background: #F5F7FA;
      border: 1px solid transparent;
      border-radius: var(--radius-search);
      padding: 12px 20px 12px 45px;
      font-size: 15px;
      color: var(--dark-abyss);
      outline: none;
      transition: var(--transition);
      font-family: var(--font-stack);
    }

    .search-input::placeholder {
      color: #A0AEC0;
      font-weight: 400;
    }

    .search-input:focus {
      background: #FFFFFF;
      border-color: var(--deep-teal);
      box-shadow: 0 0 0 3px rgba(26, 95, 122, 0.1);
    }

    .search-icon {
      position: absolute;
      left: 18px;
      top: 50%;
      transform: translateY(-50%);
      color: #A0AEC0;
      font-size: 18px;
    }

    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
      font-weight: 500;
      color: var(--text-primary);
    }

    .nav-links a {
      font-size: 15px;
      white-space: nowrap;
      position: relative;
    }

    .nav-links a:hover {
      color: var(--deep-teal);
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--warm-gold);
      transition: width 0.2s;
    }

    .nav-links a:hover::after {
      width: 100%;
    }

    .mobile-menu-icon {
      display: none;
      font-size: 24px;
      color: var(--deep-teal);
      cursor: pointer;
    }

    /* Hero */
    .hero {
      background: linear-gradient(135deg, #F0F5F8 0%, #FAFBFD 100%);
      padding: 80px 0;
    }

    .hero-grid {
      display: flex;
      align-items: center;
      gap: 50px;
    }

    .hero-content {
      flex: 1;
    }

    .hero-content h1 {
      font-size: 50px;
      font-weight: 700;
      color: var(--dark-abyss);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-content p {
      font-size: 18px;
      color: var(--text-primary);
      margin-bottom: 32px;
      max-width: 500px;
    }

    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--warm-gold);
      color: #FFFFFF;
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      transition: var(--transition);
      display: inline-block;
      text-align: center;
    }

    .btn-primary:hover {
      background: var(--gold-hover);
      color: #fff;
    }

    .btn-secondary {
      background: transparent;
      border: 2px solid var(--deep-teal);
      color: var(--deep-teal);
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      transition: var(--transition);
      display: inline-block;
    }

    .btn-secondary:hover {
      background: var(--deep-teal);
      color: #fff;
    }

    .hero-image {
      flex: 1;
      text-align: right;
    }

    .hero-image img {
      max-width: 100%;
      border-radius: 28px;
      box-shadow: var(--shadow-sm);
    }

    /* 通用板块 */
    .section {
      padding: 80px 0;
    }

    .section-title {
      font-size: 34px;
      font-weight: 600;
      color: var(--deep-teal);
      margin-bottom: 12px;
      position: relative;
      display: inline-block;
    }

    .title-underline {
      width: 50px;
      height: 3px;
      background: var(--warm-gold);
      margin: 8px 0 40px;
    }

    /* 卡片网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .feature-card {
      background: var(--card-bg);
      padding: 32px 24px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: var(--transition);
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }

    .feature-icon {
      font-size: 44px;
      color: var(--warm-gold);
      margin-bottom: 16px;
    }

    .feature-card h3 {
      font-size: 22px;
      color: var(--dark-abyss);
      margin-bottom: 12px;
    }

    /* 交错图文 */
    .service-row {
      display: flex;
      align-items: center;
      gap: 50px;
      margin-bottom: 60px;
    }

    .service-row.reverse {
      flex-direction: row-reverse;
    }

    .service-img {
      flex: 1;
    }

    .service-text {
      flex: 1;
    }

    .service-text h3 {
      font-size: 28px;
      color: var(--dark-abyss);
      margin-bottom: 16px;
    }

    .text-link {
      color: var(--warm-gold);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: var(--transition);
    }

    .text-link:hover {
      transform: translateX(4px);
    }

    /* 数据模块 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      text-align: center;
      gap: 30px;
    }

    .stat-number {
      font-size: 48px;
      font-weight: 700;
      color: var(--deep-teal);
      line-height: 1.2;
    }

    .stat-label {
      color: var(--text-muted);
      font-size: 16px;
      margin-top: 8px;
    }

    /* 步骤条 */
    .steps {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      position: relative;
    }

    .step {
      text-align: center;
      flex: 1;
      position: relative;
    }

    .step-circle {
      width: 48px;
      height: 48px;
      background: var(--warm-gold);
      color: white;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 20px;
      margin: 0 auto 16px;
    }

    .step h4 {
      color: var(--dark-abyss);
    }

    /* 案例卡片 */
    .case-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .case-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }

    .case-img {
      height: 200px;
      overflow: hidden;
    }

    .case-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s;
    }

    .case-card:hover .case-img img {
      transform: scale(1.03);
    }

    .case-info {
      padding: 20px;
    }

    .tag {
      background: #E8F4F8;
      color: var(--deep-teal);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 13px;
      display: inline-block;
      margin-bottom: 10px;
    }

    /* FAQ */
    .accordion {
      background: var(--card-bg);
    }

    .accordion-item {
      border-bottom: 1px solid var(--border-light);
    }

    .accordion-title {
      background: #FFFFFF;
      padding: 20px 24px;
      font-weight: 600;
      color: var(--dark-abyss);
      cursor: pointer;
      transition: var(--transition);
      font-size: 18px;
      display: flex;
      justify-content: space-between;
    }

    .accordion-title:hover {
      color: var(--deep-teal);
    }

    .accordion-content {
      background: #FAFBFD;
      padding: 0 24px 20px;
      display: none;
      color: var(--text-primary);
    }

    .accordion-item.active .accordion-content {
      display: block;
    }

    .accordion-item.active .accordion-title {
      color: var(--deep-teal);
    }

    /* CTA */
    .cta-section {
      background: #F0F5F8;
      text-align: center;
      padding: 70px 0;
    }

    /* Footer */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      padding: 60px 0 30px;
    }

    .footer-col p {
      color: var(--text-muted);
    }

    .footer-col h4 {
      color: var(--dark-abyss);
      margin-bottom: 16px;
    }

    .footer-links a {
      display: block;
      color: var(--text-muted);
      margin-bottom: 8px;
    }

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

    .social-icons i {
      font-size: 22px;
      margin-right: 16px;
      color: var(--text-muted);
      transition: var(--transition);
    }

    .social-icons i:hover {
      color: var(--deep-teal);
    }

    .copyright {
      border-top: 1px solid var(--border-light);
      padding: 20px 0;
      text-align: center;
      color: #A0AEC0;
      font-size: 13px;
    }

    @media (max-width: 1024px) {
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-links, .search-wrapper {
        display: none;
      }
      .mobile-menu-icon {
        display: block;
      }
      .hero-grid {
        flex-direction: column;
      }
      .hero-content h1 {
        font-size: 38px;
      }
      .grid-3, .stats-grid {
        grid-template-columns: 1fr;
      }
      .service-row {
        flex-direction: column;
      }
      .service-row.reverse {
        flex-direction: column;
      }
      .steps {
        flex-direction: column;
        gap: 30px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }