/* roulang page: index */
:root {
      --primary: #F15A24;
      --primary-dark: #D94A1A;
      --secondary-dark: #1B2A3A;
      --secondary-light: #E8ECF1;
      --accent: #FFC107;
      --accent-dark: #F5B800;
      --bg: #FAFBFD;
      --card-bg: #FFFFFF;
      --text-main: #1B2A3A;
      --text-secondary: #5C6B7A;
      --text-weak: #8B95A5;
      --border-light: #E8ECF1;
      --shadow-sm: 0 2px 12px rgba(27,42,58,0.06);
      --shadow-md: 0 8px 28px rgba(27,42,58,0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-tag: 6px;
      --radius-capsule: 20px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Inter", "Segoe UI", sans-serif;
      --max-width: 1200px;
      --header-height: 64px;
    }

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

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

    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }

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

    a {
      text-decoration: none;
      color: inherit;
    }

    button, .button {
      cursor: pointer;
      font-family: inherit;
      transition: all 0.2s ease;
    }

    h1, h2, h3 {
      margin: 0;
      font-weight: 600;
    }

    h1 {
      font-size: 44px;
      font-weight: 700;
      line-height: 1.2;
      color: var(--secondary-dark);
    }

    h2 {
      font-size: 32px;
      font-weight: 600;
      line-height: 1.3;
      color: var(--secondary-dark);
      margin-bottom: 16px;
    }

    h3 {
      font-size: 22px;
      font-weight: 600;
      color: var(--secondary-dark);
    }

    .text-secondary {
      color: var(--text-secondary);
      font-size: 16px;
    }

    .text-weak {
      color: var(--text-weak);
      font-size: 14px;
    }

    /* Header & Navigation */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--header-height);
      background: #fff;
      box-shadow: 0 1px 8px rgba(0,0,0,0.04);
      z-index: 100;
      display: flex;
      align-items: center;
    }

    .header-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 22px;
      color: var(--secondary-dark);
    }

    .logo i {
      color: var(--primary);
      font-size: 28px;
    }

    .nav-links {
      display: flex;
      gap: 28px;
      list-style: none;
      margin: 0;
    }

    .nav-links a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-secondary);
      padding: 4px 0;
      border-bottom: 2px solid transparent;
      transition: color 0.2s, border-color 0.2s;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
    }

    .nav-links a.active {
      border-bottom-color: var(--primary);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .search-icon {
      font-size: 18px;
      color: var(--text-secondary);
      cursor: pointer;
    }

    .login-btn {
      background: transparent;
      border: none;
      color: var(--text-secondary);
      font-weight: 500;
      font-size: 15px;
    }

    .cta-capsule {
      background: var(--accent);
      color: var(--secondary-dark);
      padding: 8px 22px;
      border-radius: var(--radius-capsule);
      font-weight: 600;
      font-size: 15px;
      border: none;
      display: inline-block;
    }

    .cta-capsule:hover {
      background: var(--accent-dark);
      color: var(--secondary-dark);
    }

    .mobile-menu-btn {
      background: none;
      border: none;
      font-size: 26px;
      color: var(--secondary-dark);
      display: none;
    }

    /* Hero */
    .hero {
      padding: calc(var(--header-height) + 60px) 0 80px;
      background: var(--bg);
      display: flex;
      align-items: center;
      min-height: 90vh;
    }

    .hero-grid {
      display: flex;
      align-items: center;
      gap: 60px;
    }

    .hero-left {
      flex: 1 1 50%;
    }

    .hero-right {
      flex: 1 1 45%;
      position: relative;
    }

    .hero-right img {
      border-radius: 16px;
      box-shadow: var(--shadow-md);
      width: 100%;
      height: auto;
    }

    .hero-buttons {
      display: flex;
      gap: 16px;
      margin-top: 32px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--primary);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      border: none;
      font-size: 16px;
    }

    .btn-primary:hover {
      background: var(--primary-dark);
      color: white;
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      padding: 12px 30px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 16px;
    }

    .btn-outline:hover {
      background: #FFF3EE;
      color: var(--primary-dark);
    }

    /* Section spacing */
    .section {
      padding: 90px 0;
    }

    .section-title {
      text-align: center;
      margin-bottom: 48px;
    }

    /* Highlights Grid */
    .highlights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .highlight-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: transform 0.2s, box-shadow 0.2s;
    }

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

    .highlight-icon {
      font-size: 38px;
      color: var(--primary);
      margin-bottom: 20px;
    }

    /* Masonry Services */
    .masonry-grid {
      columns: 3;
      column-gap: 28px;
      margin-top: 24px;
    }

    .masonry-item {
      break-inside: avoid;
      margin-bottom: 28px;
      background: var(--card-bg);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s, box-shadow 0.2s;
      overflow: hidden;
    }

    .masonry-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .masonry-item img {
      width: 100%;
      display: block;
      border-radius: var(--radius-card) var(--radius-card) 0 0;
    }

    .masonry-content {
      padding: 20px 24px 24px;
    }

    .tag {
      background: var(--accent);
      color: var(--secondary-dark);
      font-size: 13px;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: var(--radius-tag);
      display: inline-block;
      margin-top: 10px;
    }

    /* Compare cards */
    .compare-row {
      display: flex;
      gap: 24px;
      justify-content: center;
      flex-wrap: wrap;
    }

    .compare-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 36px 28px;
      flex: 1 1 280px;
      box-shadow: var(--shadow-sm);
      border: 2px solid transparent;
      text-align: center;
      transition: all 0.2s;
    }

    .compare-card.recommended {
      border-color: var(--primary);
      position: relative;
      box-shadow: var(--shadow-md);
    }

    .price {
      font-size: 42px;
      font-weight: 700;
      color: var(--primary);
      margin: 20px 0 16px;
    }

    .feature-list {
      list-style: none;
      text-align: left;
      margin: 24px 0;
    }

    .feature-list li {
      padding: 8px 0;
      color: var(--text-secondary);
    }

    .feature-list i {
      color: var(--primary);
      margin-right: 10px;
    }

    /* Stats */
    .stats-grid {
      display: flex;
      justify-content: space-around;
      flex-wrap: wrap;
      text-align: center;
      gap: 30px;
    }

    .stat-number {
      font-size: 48px;
      font-weight: 700;
      color: var(--primary);
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      margin-bottom: 12px;
    }

    .faq-question {
      background: none;
      border: none;
      width: 100%;
      text-align: left;
      padding: 20px 0;
      font-weight: 600;
      font-size: 18px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--secondary-dark);
      cursor: pointer;
    }

    .faq-answer {
      padding: 0 0 20px;
      color: var(--text-secondary);
      display: none;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    /* CTA Banner */
    .cta-banner {
      background: var(--secondary-dark);
      color: white;
      text-align: center;
      padding: 80px 24px;
      border-radius: 0;
    }

    .cta-banner h2 {
      color: white;
    }

    .btn-large {
      background: var(--accent);
      color: var(--secondary-dark);
      padding: 16px 44px;
      font-size: 18px;
      font-weight: 700;
      border-radius: var(--radius-capsule);
      border: none;
      margin-top: 24px;
    }

    /* Footer */
    .site-footer {
      background: var(--secondary-dark);
      color: #B0BAC5;
      padding: 60px 0 20px;
    }

    .footer-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 40px;
      justify-content: space-between;
    }

    .footer-col {
      flex: 1 1 180px;
    }

    .footer-logo {
      font-size: 20px;
      font-weight: 700;
      color: white;
      margin-bottom: 12px;
    }

    .footer-links {
      list-style: none;
    }

    .footer-links li {
      margin-bottom: 8px;
    }

    .footer-links a {
      color: #B0BAC5;
    }

    .footer-links a:hover {
      color: white;
    }

    .copyright {
      text-align: center;
      margin-top: 40px;
      font-size: 13px;
      color: #8B95A5;
    }

    @media (max-width: 1024px) {
      .hero-grid {
        flex-direction: column;
        text-align: center;
      }
      .masonry-grid {
        columns: 2;
      }
    }

    @media (max-width: 768px) {
      h1 { font-size: 32px; }
      h2 { font-size: 26px; }
      .nav-links, .header-actions .search-icon, .header-actions .login-btn {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .highlights-grid {
        grid-template-columns: 1fr;
      }
      .compare-row {
        flex-direction: column;
      }
      .masonry-grid {
        columns: 1;
      }
      .stats-grid {
        flex-direction: column;
        gap: 20px;
      }
    }