/* roulang page: index */
:root {
      --primary: #1A0A2E;
      --secondary: #D4AF37;
      --bg-warm: #F8F6F2;
      --accent: #C41E3A;
      --text-dark: #1E1E1E;
      --text-muted: #4A4A4A;
      --card-bg: #FFFFFF;
      --border-light: rgba(212, 175, 55, 0.2);
      --shadow-sm: 0 4px 20px rgba(26, 10, 46, 0.08);
      --shadow-hover: 0 8px 30px rgba(26, 10, 46, 0.15);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-pill: 24px;
      --font-serif: 'Noto Serif SC', serif;
      --font-sans: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
    }
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-dark);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease;
    }
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(26, 10, 46, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(212, 175, 55, 0.25);
      z-index: 50;
      padding: 0.75rem 0;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
    }
    .logo-text {
      font-family: var(--font-serif);
      font-weight: 900;
      font-size: 1.5rem;
      letter-spacing: 2px;
      color: var(--secondary);
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .logo-icon {
      font-size: 1.8rem;
      color: var(--secondary);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
      color: #e5e5e5;
      font-weight: 500;
    }
    .nav-links a {
      color: #cccccc;
      font-size: 0.95rem;
      transition: color 0.2s;
    }
    .nav-links a:hover {
      color: var(--secondary);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 1rem;
    }
    .btn-pill {
      background-color: var(--secondary);
      color: var(--primary);
      font-weight: 700;
      padding: 0.5rem 1.5rem;
      border-radius: 999px;
      font-size: 0.9rem;
      transition: background 0.2s, transform 0.1s;
      border: none;
      cursor: pointer;
    }
    .btn-pill:hover {
      background-color: #c4a02d;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: var(--secondary);
      font-size: 1.75rem;
      cursor: pointer;
    }
    /* 移动端菜单 */
    .mobile-menu {
      display: none;
      flex-direction: column;
      background: rgba(26, 10, 46, 0.98);
      backdrop-filter: blur(12px);
      padding: 1.5rem;
      border-radius: 0 0 16px 16px;
      margin-top: 0.5rem;
    }
    .mobile-menu a {
      padding: 0.75rem 0;
      border-bottom: 1px solid rgba(212,175,55,0.2);
      color: #ddd;
    }
    /* Hero */
    .hero-bg {
      background: radial-gradient(circle at 30% 30%, #2a1242, #1A0A2E);
      position: relative;
      overflow: hidden;
    }
    .hero-bg::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" fill="none" stroke="rgba(212,175,55,0.08)" stroke-width="0.6"><path d="M0 25 L100 25 M0 50 L100 50 M0 75 L100 75 M25 0 L25 100 M50 0 L50 100 M75 0 L75 100"/></svg>');
      opacity: 0.3;
      pointer-events: none;
    }
    .section-spacing {
      padding-top: 5rem;
      padding-bottom: 5rem;
    }
    @media (max-width: 640px) {
      .section-spacing {
        padding-top: 3rem;
        padding-bottom: 3rem;
      }
      .nav-links, .nav-actions .btn-pill {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .mobile-menu.show {
        display: flex;
      }
    }
    /* 卡片 */
    .card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      transition: box-shadow 0.25s, border-color 0.25s;
    }
    .card:hover {
      box-shadow: var(--shadow-hover);
      border-color: var(--secondary);
    }
    .btn-primary {
      background: var(--secondary);
      color: var(--primary);
      font-weight: 700;
      padding: 0.75rem 2rem;
      border-radius: var(--radius-btn);
      transition: background 0.2s, transform 0.1s;
      display: inline-block;
      text-align: center;
    }
    .btn-primary:hover {
      background: #c4a02d;
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--secondary);
      color: var(--secondary);
      font-weight: 700;
      padding: 0.7rem 1.8rem;
      border-radius: var(--radius-btn);
      transition: background 0.2s;
    }
    .btn-outline:hover {
      background: rgba(212,175,55,0.1);
    }
    .btn-accent {
      background: var(--accent);
      color: white;
      font-weight: 700;
      padding: 1rem 3rem;
      border-radius: 32px;
      font-size: 1.125rem;
      transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
      box-shadow: 0 4px 14px rgba(196,30,58,0.4);
    }
    .btn-accent:hover {
      background: #a01830;
      transform: scale(1.05);
      box-shadow: 0 8px 22px rgba(196,30,58,0.55);
    }
    .faq-item {
      border-bottom: 1px solid rgba(26,10,46,0.1);
    }
    .faq-question {
      cursor: pointer;
      padding: 1rem 0;
      font-weight: 700;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
    }