/* roulang page: index */
:root {
      --primary: #0A6E5C;
      --primary-dark: #0A3D34;
      --accent: #F4A261;
      --accent-hover: #E68A4A;
      --bg: #FAFAF7;
      --card-bg: #FFFFFF;
      --text-main: #1E2D2B;
      --text-secondary: #5B6B68;
      --text-light: #FFFFFF;
      --border: #E0E4E2;
      --light-green-bg: #F2F7F5;
      --shadow-sm: 0 2px 12px rgba(10, 110, 92, 0.06);
      --shadow-md: 0 8px 24px rgba(10, 110, 92, 0.12);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-pill: 24px;
      --spacing-section: 100px;
      --container-max: 1200px;
      --font-stack-cn: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --font-stack-num: "Inter", "SF Pro Display", system-ui;
    }

    * {
      box-sizing: border-box;
    }

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

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 40px;
    }

    @media (max-width: 640px) {
      .container {
        padding: 0 20px;
      }
    }

    /* 自定义覆盖 Foundation 按钮样式 */
    .button.primary-cta {
      background: var(--accent);
      color: var(--text-main);
      border-radius: var(--radius-sm);
      padding: 12px 28px;
      font-weight: 600;
      transition: all 0.25s ease;
      border: none;
      display: inline-block;
      text-decoration: none;
      box-shadow: 0 4px 8px rgba(244, 162, 97, 0.2);
    }
    .button.primary-cta:hover {
      background: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 18px rgba(244, 162, 97, 0.35);
      color: var(--text-main);
    }

    .button.secondary-outline {
      border: 2px solid var(--primary);
      color: var(--primary);
      background: transparent;
      border-radius: var(--radius-sm);
      padding: 10px 26px;
      font-weight: 600;
      transition: all 0.25s ease;
    }
    .button.secondary-outline:hover {
      background: var(--primary);
      color: white;
      border-color: var(--primary);
    }

    /* 导航栏 */
    .main-header {
      background: white;
      padding: 16px 0;
      position: sticky;
      top: 0;
      z-index: 50;
      border-bottom: 1px solid var(--border);
      box-shadow: 0 2px 8px rgba(0,0,0,0.02);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
    }
    .logo {
      font-size: 22px;
      font-weight: 700;
      color: var(--primary);
      text-decoration: none;
      letter-spacing: 0.5px;
    }
    .search-box {
      flex: 0 0 40%;
      position: relative;
    }
    .search-box input {
      width: 100%;
      background: white;
      border: 1px solid var(--border);
      border-radius: var(--radius-pill);
      padding: 10px 18px 10px 44px;
      font-size: 15px;
      outline: none;
      transition: all 0.2s;
      color: var(--text-main);
    }
    .search-box input:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(10,110,92,0.15);
    }
    .search-icon {
      position: absolute;
      left: 18px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--primary);
      font-size: 16px;
    }
    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
    }
    .nav-links a {
      color: var(--text-secondary);
      text-decoration: none;
      font-weight: 500;
      font-size: 15px;
      transition: color 0.2s;
    }
    .nav-links a:hover {
      color: var(--primary);
    }
    .hamburger {
      display: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--primary);
    }
    @media (max-width: 1024px) {
      .search-box {
        flex: 0 0 55%;
      }
    }
    @media (max-width: 768px) {
      .nav-container {
        flex-wrap: wrap;
      }
      .hamburger {
        display: block;
        order: 3;
      }
      .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        margin-top: 16px;
        gap: 12px;
        background: white;
        padding: 16px 0;
      }
      .nav-links.active {
        display: flex;
      }
      .search-box {
        flex: 0 0 100%;
        order: 2;
        margin-top: 12px;
      }
    }

    /* Hero */
    .hero {
      background: linear-gradient(180deg, #E8F5F1 0%, #FAFAF7 100%);
      padding: 70px 0 80px;
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 48px;
    }
    .hero-left {
      flex: 1 1 60%;
    }
    .hero-right {
      flex: 1 1 40%;
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .hero h1 {
      font-size: 40px;
      font-weight: 700;
      line-height: 1.2;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .hero-sub {
      font-size: 16px;
      color: var(--text-secondary);
      margin-bottom: 28px;
      line-height: 1.5;
    }
    .metric-card {
      background: white;
      border-radius: var(--radius-md);
      padding: 18px 12px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border);
      transition: all 0.2s;
    }
    .metric-card i {
      font-size: 24px;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .metric-number {
      font-family: var(--font-stack-num);
      font-size: 32px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
    }
    .metric-label {
      font-size: 13px;
      color: var(--text-secondary);
      margin-top: 4px;
    }
    @media (max-width: 768px) {
      .hero-grid {
        flex-direction: column;
      }
      .hero-right {
        grid-template-columns: repeat(2, 1fr);
        width: 100%;
      }
      .hero h1 {
        font-size: 32px;
      }
    }

    /* 服务矩阵 */
    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 40px;
      text-align: center;
    }
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--card-bg);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      align-items: flex-start;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }
    .service-icon {
      width: 48px;
      height: 48px;
      background: #E8F5F1;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
      overflow: hidden;
    }
    .service-icon img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .service-card h3 {
      font-size: 22px;
      font-weight: 600;
      margin-bottom: 8px;
    }
    .service-desc {
      font-size: 14px;
      color: var(--text-secondary);
      margin-bottom: 16px;
      line-height: 1.5;
    }
    .service-link {
      color: var(--primary);
      font-weight: 600;
      text-decoration: none;
      font-size: 15px;
    }
    .service-link:hover {
      text-decoration: underline;
    }
    @media (max-width: 1024px) {
      .services-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 640px) {
      .services-grid {
        grid-template-columns: 1fr;
      }
    }

    /* 对比表 */
    .comparison {
      background: var(--light-green-bg);
      padding: 80px 0;
    }
    .compare-table {
      display: flex;
      gap: 0;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .col-bad, .col-good {
      flex: 1;
      background: white;
    }
    .col-header {
      background: var(--primary);
      color: white;
      padding: 16px;
      font-weight: 700;
      font-size: 18px;
      text-align: center;
    }
    .col-good .col-header {
      background: var(--primary-dark);
    }
    .row-item {
      display: flex;
      align-items: center;
      padding: 14px 20px;
      border-bottom: 1px solid var(--border);
      font-size: 15px;
    }
    .row-item i {
      margin-right: 12px;
      font-size: 18px;
    }
    .fa-times-circle { color: #c0392b; }
    .fa-check-circle { color: var(--primary); }
    @media (max-width: 640px) {
      .compare-table {
        flex-direction: column;
      }
    }

    /* FAQ */
    .faq-section {
      padding: 80px 0;
    }
    .accordion-item {
      border-bottom: 1px solid var(--border);
      margin-bottom: 8px;
    }
    .accordion-question {
      background: white;
      padding: 18px 20px;
      font-weight: 600;
      font-size: 18px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      transition: background 0.2s;
    }
    .accordion-question:hover {
      background: #E8F5F1;
    }
    .accordion-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #FAFAF7;
      padding: 0 20px;
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.7;
    }
    .accordion-item.active .accordion-answer {
      max-height: 220px;
      padding: 16px 20px;
    }
    .icon-toggle {
      color: var(--primary);
      font-weight: bold;
    }

    /* CTA 表单 */
    .cta-dark {
      background: var(--primary-dark);
      padding: 80px 0;
    }
    .cta-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 40px;
      max-width: 680px;
      margin: 0 auto;
      box-shadow: 0 20px 40px rgba(0,0,0,0.15);
    }
    .cta-dark h2 {
      color: white;
      text-align: center;
      margin-bottom: 8px;
    }
    .cta-sub {
      color: rgba(255,255,255,0.85);
      text-align: center;
      margin-bottom: 28px;
    }
    .form-input {
      width: 100%;
      padding: 12px;
      margin-bottom: 18px;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      background: #FAFAF7;
    }
    .trust-badges {
      display: flex;
      justify-content: center;
      gap: 28px;
      margin-top: 20px;
      color: rgba(255,255,255,0.9);
      font-size: 13px;
    }

    /* 页脚 */
    .footer {
      background: #1E2D2B;
      color: rgba(255,255,255,0.8);
      padding: 48px 0 20px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 28px;
      margin-bottom: 28px;
    }
    .footer a {
      color: rgba(255,255,255,0.7);
      text-decoration: none;
    }
    .footer a:hover {
      color: var(--accent);
    }
    .copyright {
      text-align: center;
      border-top: 1px solid rgba(255,255,255,0.2);
      padding-top: 18px;
      font-size: 14px;
    }
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 480px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }
    .spacing-section {
      padding: 80px 0;
    }