/* roulang page: index */
:root {
      --primary: #1A3C34;
      --primary-dark: #153029;
      --accent: #C59237;
      --accent-dark: #B07D2A;
      --bg: #F7F5F0;
      --dark-bg: #0F2620;
      --text: #2C2C2C;
      --text-heading: #1A3C34;
      --text-muted: #5C5C5C;
      --border: #E0DCD3;
      --card-bg: #FFFFFF;
      --radius-sm: 8px;
      --radius-md: 12px;
      --shadow-hover: 0 8px 24px rgba(26, 60, 52, 0.08);
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.8;
      margin: 0;
      font-weight: 400;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    .font-inter {
      font-family: 'Inter', 'Noto Sans SC', sans-serif;
    }
    h1, h2, h3, h4 {
      font-family: 'Noto Sans SC', system-ui, sans-serif;
      color: var(--text-heading);
      font-weight: 700;
      margin-top: 0;
    }
    h1 {
      font-size: 42px;
      letter-spacing: -0.02em;
      line-height: 1.2;
    }
    h2 {
      font-size: 32px;
      line-height: 1.3;
    }
    h3 {
      font-size: 22px;
      font-weight: 600;
      line-height: 1.4;
    }
    .text-muted {
      color: var(--text-muted);
    }
    .text-accent {
      color: var(--accent);
    }
    .bg-primary {
      background-color: var(--primary);
    }
    .bg-dark {
      background-color: var(--dark-bg);
    }
    .bg-accent {
      background-color: var(--accent);
    }
    .border-custom {
      border-color: var(--border);
    }
    .card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      transition: all 0.25s ease;
    }
    .card:hover {
      border-color: var(--primary);
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .btn-primary {
      background-color: var(--primary);
      color: white;
      border-radius: var(--radius-sm);
      padding: 14px 32px;
      font-weight: 500;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: background-color 0.2s;
      text-decoration: none;
      border: none;
      cursor: pointer;
      font-size: 16px;
    }
    .btn-primary:hover {
      background-color: var(--primary-dark);
      color: white;
    }
    .btn-outline {
      border: 2px solid var(--primary);
      color: var(--primary);
      background: transparent;
      border-radius: var(--radius-sm);
      padding: 14px 32px;
      font-weight: 500;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all 0.2s;
      text-decoration: none;
      cursor: pointer;
      font-size: 16px;
    }
    .btn-outline:hover {
      background-color: var(--primary);
      color: white;
    }
    .btn-accent {
      background-color: var(--accent);
      color: #1A3C34;
      font-weight: 600;
      border-radius: var(--radius-sm);
      padding: 14px 32px;
      transition: background-color 0.2s;
      border: none;
      cursor: pointer;
      font-size: 16px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
    }
    .btn-accent:hover {
      background-color: var(--accent-dark);
      color: #1A3C34;
    }
    .btn-white-outline {
      border: 2px solid white;
      color: white;
      background: transparent;
      border-radius: var(--radius-sm);
      padding: 14px 32px;
      font-weight: 500;
      transition: all 0.2s;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      text-decoration: none;
    }
    .btn-white-outline:hover {
      background: white;
      color: var(--dark-bg);
    }
    .container-custom {
      max-width: 1280px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    .section-gap {
      margin-bottom: 120px;
    }
    .nav-link {
      font-size: 16px;
      font-weight: 500;
      color: var(--text);
      text-decoration: none;
      padding: 8px 0;
      position: relative;
      transition: color 0.2s;
    }
    .nav-link:hover {
      color: var(--primary);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--primary);
      transition: width 0.25s ease;
    }
    .nav-link:hover::after {
      width: 100%;
    }
    .hamburger-line {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--primary);
      margin: 5px 0;
      transition: 0.3s;
    }
    .mobile-menu {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: white;
      z-index: 50;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 32px;
    }
    .mobile-menu.active {
      display: flex;
    }
    input, textarea {
      border: 1px solid var(--border);
      border-radius: 6px;
      padding: 12px 16px;
      font-size: 16px;
      width: 100%;
      background: white;
      transition: border 0.2s;
      font-family: 'Noto Sans SC', sans-serif;
    }
    input:focus, textarea:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(26,60,52,0.1);
    }
    .faq-item {
      border-bottom: 1px solid var(--border);
      cursor: pointer;
    }
    .faq-question {
      font-size: 18px;
      font-weight: 600;
      padding: 20px 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--text-heading);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.4s ease;
      background: #FAF9F7;
      padding: 0 16px;
      border-radius: 0 0 8px 8px;
    }
    .faq-item.open .faq-answer {
      max-height: 200px;
      padding: 16px;
    }
    @media (max-width: 1024px) {
      h1 { font-size: 36px; }
      h2 { font-size: 28px; }
    }
    @media (max-width: 768px) {
      .container-custom {
        padding-left: 16px;
        padding-right: 16px;
      }
      .section-gap {
        margin-bottom: 80px;
      }
      h1 { font-size: 30px; }
      h2 { font-size: 24px; }
      h3 { font-size: 20px; }
      .desktop-nav {
        display: none;
      }
      .mobile-hamburger {
        display: block;
      }
      .hero-grid {
        flex-direction: column;
      }
      .data-cards-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .advantages-grid, .services-alt-grid {
        grid-template-columns: 1fr;
      }
      .compare-columns {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
      }
      .cta-split {
        flex-direction: column;
      }
      .btn-full-mobile {
        width: 100%;
      }
    }
    @media (min-width: 769px) {
      .mobile-hamburger {
        display: none;
      }
    }
    @media (max-width: 480px) {
      .data-cards-grid {
        grid-template-columns: 1fr;
      }
    }
    .decor-circle {
      position: absolute;
      top: -20px;
      right: -20px;
      width: 300px;
      height: 300px;
      background: rgba(26,60,52,0.03);
      border-radius: 50%;
      z-index: 0;
    }