/* roulang page: index */
:root {
      --primary: #1A1A2E;
      --accent: #E94560;
      --bg: #F8F9FA;
      --text: #4A4A4A;
      --deep-blue: #0F3460;
      --card-shadow: 0 8px 30px rgba(0,0,0,0.06);
      --card-hover-shadow: 0 16px 40px rgba(0,0,0,0.12);
      --radius-lg: 20px;
      --radius-btn: 50px;
      --transition: 0.3s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    button, .btn {
      cursor: pointer;
      font-family: inherit;
    }
    .container {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    .section-padding {
      padding-top: 80px;
      padding-bottom: 80px;
    }
    @media (max-width: 768px) {
      .section-padding {
        padding-top: 60px;
        padding-bottom: 60px;
      }
    }
    .top-bar {
      background: var(--primary);
      color: white;
      font-size: 13px;
      height: 40px;
      display: flex;
      align-items: center;
    }
    .main-nav {
      background: white;
      height: 72px;
      display: flex;
      align-items: center;
      position: sticky;
      top: 0;
      z-index: 50;
      box-shadow: 0 2px 10px rgba(0,0,0,0.04);
    }
    .logo-text {
      font-size: 24px;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .logo-text span {
      color: var(--accent);
    }
    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--primary);
      padding: 8px 0;
      margin: 0 12px;
      border-bottom: 2px solid transparent;
      transition: var(--transition);
    }
    .nav-link:hover {
      color: var(--accent);
      border-bottom-color: var(--accent);
    }
    .btn-primary {
      background: var(--accent);
      color: white;
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      border: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: var(--transition);
      box-shadow: 0 6px 18px rgba(233,69,96,0.25);
    }
    .btn-primary:hover {
      filter: brightness(1.1);
      transform: scale(1.02);
      box-shadow: 0 8px 24px rgba(233,69,96,0.35);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      padding: 10px 26px;
      border-radius: var(--radius-btn);
      transition: var(--transition);
    }
    .btn-outline:hover {
      background: var(--primary);
      color: white;
    }
    .card {
      background: white;
      border-radius: var(--radius-lg);
      box-shadow: var(--card-shadow);
      padding: 32px;
      transition: var(--transition);
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-hover-shadow);
    }
    .stat-badge {
      background: linear-gradient(135deg, var(--primary), var(--deep-blue));
      border-radius: 16px;
      padding: 28px 20px;
      text-align: center;
      color: white;
    }
    .stat-number {
      font-size: 48px;
      font-weight: 800;
      color: var(--accent);
      line-height: 1.1;
    }
    .faq-item {
      border-bottom: 1px solid #e2e8f0;
      padding: 18px 0;
    }
    .faq-question {
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: #4a5568;
      font-size: 15px;
      margin-top: 0;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      margin-top: 12px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }
    .hamburger {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--primary);
    }
    @media (max-width: 768px) {
      .desktop-nav {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .mobile-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 24px;
        box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        z-index: 40;
      }
      .mobile-menu.open {
        display: flex;
      }
      .nav-link {
        margin: 8px 0;
        font-size: 18px;
      }
    }
    .hero-bg {
      background: linear-gradient(135deg, var(--primary), var(--deep-blue));
    }
    .testimonial-quote {
      font-style: italic;
      position: relative;
      padding-left: 24px;
    }
    .testimonial-quote::before {
      content: "“";
      font-size: 40px;
      color: var(--accent);
      position: absolute;
      left: 0;
      top: -10px;
    }