/* roulang page: index */
:root {
      --primary: #1E2D2F;
      --accent: #C9A96E;
      --bg-warm: #F7F5F0;
      --text-dark: #1A1A1A;
      --text-body: #3A3A3A;
      --text-muted: #6B6B6B;
      --radius-card: 12px;
      --shadow-card: 0 4px 12px rgba(0,0,0,0.04);
      --shadow-hover: 0 12px 28px rgba(0,0,0,0.08);
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      background-color: var(--bg-warm);
      color: var(--text-body);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4 {
      font-weight: 600;
      color: var(--text-dark);
      line-height: 1.3;
    }

    h1 {
      font-weight: 700;
    }

    .accent-text {
      color: var(--accent);
    }

    .bg-primary {
      background-color: var(--primary);
    }

    .bg-accent {
      background-color: var(--accent);
    }

    .text-primary {
      color: var(--primary);
    }

    .border-accent {
      border-color: var(--accent);
    }

    .btn-primary {
      background-color: var(--primary);
      color: white;
      border-radius: 8px;
      padding: 14px 32px;
      font-weight: 600;
      transition: all 0.3s ease;
      display: inline-block;
      text-align: center;
      border: none;
      cursor: pointer;
    }

    .btn-primary:hover {
      filter: brightness(1.15);
      transform: translateY(-1px);
      box-shadow: 0 8px 18px rgba(0,0,0,0.1);
    }

    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: var(--primary);
      border-radius: 8px;
      padding: 14px 32px;
      font-weight: 600;
      transition: all 0.3s ease;
      display: inline-block;
      text-align: center;
      cursor: pointer;
    }

    .btn-outline:hover {
      background-color: rgba(30, 45, 47, 0.08);
      border-color: var(--accent);
      color: var(--accent);
    }

    .btn-accent {
      background-color: var(--accent);
      color: #1A1A1A;
      border-radius: 8px;
      padding: 14px 32px;
      font-weight: 700;
      transition: all 0.3s ease;
      display: inline-block;
      text-align: center;
      border: none;
      cursor: pointer;
    }

    .btn-accent:hover {
      filter: brightness(1.1);
      transform: translateY(-1px);
    }

    .card {
      background: white;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
    }

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

    .section-padding {
      padding: 5rem 1.5rem;
    }

    @media (max-width: 768px) {
      .section-padding {
        padding: 3rem 1rem;
      }
      h1 {
        font-size: 2rem !important;
      }
    }

    .nav-blur {
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(0,0,0,0.05);
    }

    .hero-background {
      background: linear-gradient(135deg, #F7F5F0 0%, #EAE4D8 100%);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
    }

    .hero-overlay {
      background: rgba(30, 45, 47, 0.6);
      backdrop-filter: blur(2px);
      position: absolute;
      inset: 0;
    }

    .service-icon {
      color: var(--accent);
      font-size: 2.5rem;
      margin-bottom: 1rem;
    }

    .stat-number {
      font-family: 'Inter', 'SF Pro Display', sans-serif;
      font-weight: 700;
      font-size: 2.8rem;
      color: var(--primary);
      line-height: 1.2;
    }

    .faq-details summary {
      list-style: none;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 1.2rem 0;
      font-weight: 600;
      font-size: 1.1rem;
      color: var(--text-dark);
      border-bottom: 1px solid #E5E0D5;
    }

    .faq-details summary::-webkit-details-marker {
      display: none;
    }

    .faq-details[open] summary {
      color: var(--accent);
    }

    .faq-icon {
      transition: transform 0.2s ease;
      font-size: 1.5rem;
      color: var(--accent);
    }

    .faq-details[open] .faq-icon {
      transform: rotate(45deg);
    }

    .footer-link:hover {
      color: var(--accent);
    }