/* roulang page: index */
:root {
      --primary: #1A1A1A;
      --accent: #C8A96E;
      --accent-hover: #B8963A;
      --bg-light: #FAF8F5;
      --bg-dark: #2B2B2B;
      --card-bg: #FFFFFF;
      --text-primary: #1A1A1A;
      --text-secondary: #5C5C5C;
      --text-light: #FAF8F5;
      --text-muted: #8A8A8A;
      --border-light: #E8E5DF;
      --border-input: #D4D0C8;
      --success: #2E7D32;
      --alert: #B03A2E;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 8px;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-card-hover: 0 12px 32px rgba(0,0,0,0.08);
      --font-serif: 'Playfair Display', 'Noto Serif SC', serif;
      --font-sans: 'Inter', 'Noto Sans SC', sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-primary);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    h1, h2, h3, h4 {
      font-family: var(--font-serif);
      letter-spacing: -0.02em;
    }
    .section-space {
      padding-top: 120px;
      padding-bottom: 120px;
    }
    @media (max-width: 768px) {
      .section-space {
        padding-top: 80px;
        padding-bottom: 80px;
      }
    }
    .accent-text {
      color: var(--accent);
    }
    .btn-primary {
      background-color: var(--accent);
      color: var(--primary);
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 12px 28px;
      transition: all 0.25s ease;
      border: none;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      letter-spacing: 0.3px;
    }
    .btn-primary:hover {
      background-color: var(--accent-hover);
      transform: translateY(-1px);
      box-shadow: 0 8px 18px rgba(200,169,110,0.3);
    }
    .btn-secondary {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 12px 28px;
      transition: all 0.25s ease;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
    }
    .btn-secondary:hover {
      background-color: var(--primary);
      color: var(--text-light);
      border-color: var(--primary);
    }
    .card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border-light);
      transition: all 0.3s ease;
    }
    .card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-4px);
      border-color: var(--accent);
    }
    .nav-blur {
      background: rgba(250,248,245,0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(0,0,0,0.05);
    }
    .scroll-shadow {
      box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    }
    .accent-border-left {
      border-left: 4px solid var(--accent);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.3s ease;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding-top: 16px;
      border-top: 1px solid var(--border-light);
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      background-color: var(--primary);
      color: var(--text-light);
    }
    .faq-icon {
      transition: all 0.3s ease;
      background-color: var(--accent);
      color: var(--primary);
      width: 22px;
      height: 22px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 400;
      line-height: 1;
    }
    @media (max-width: 1024px) {
      .desktop-nav-links {
        display: none !important;
      }
      .mobile-menu-btn {
        display: flex !important;
      }
    }
    .mobile-menu {
      display: none;
    }
    .mobile-menu.open {
      display: flex;
    }
    .hero-bg {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .hero-overlay {
      background: linear-gradient(90deg, rgba(250,248,245,0.92) 0%, rgba(250,248,245,0.7) 60%, rgba(250,248,245,0.4) 100%);
    }
    @media (max-width: 768px) {
      .hero-overlay {
        background: rgba(250,248,245,0.88);
      }
    }
    .data-number {
      font-family: var(--font-sans);
      font-weight: 700;
      font-size: 48px;
      color: var(--accent);
      line-height: 1.1;
    }