/* roulang page: index */
:root {
      --gold: #C9A13B;
      --gold-light: #FDF6E7;
      --dark: #1A1A2E;
      --red: #E53E3E;
      --red-deep: #C53030;
      --warm-bg: #FAFAF8;
      --white: #FFFFFF;
      --gray-light: #F5F5F5;
      --border-light: rgba(201,161,59,0.18);
      --shadow-card: 0 8px 24px rgba(0,0,0,0.04);
      --shadow-hover: 0 16px 36px rgba(201,161,59,0.12);
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-btn: 8px;
      --font-sans: system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--warm-bg);
      color: var(--dark);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航玻璃态 */
    .glass-nav {
      background: rgba(250,250,248,0.72);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(201,161,59,0.15);
      box-shadow: 0 2px 12px rgba(0,0,0,0.03);
      transition: all 0.3s ease;
    }
    .nav-scrolled {
      background: rgba(250,250,248,0.96);
      border-bottom: 1px solid #E5E0D5;
    }
    .nav-link {
      color: var(--dark);
      font-weight: 500;
      transition: 0.2s;
      position: relative;
      padding-bottom: 4px;
    }
    .nav-link:hover {
      color: var(--gold);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--gold);
      transition: width 0.2s ease;
    }
    .nav-link:hover::after {
      width: 100%;
    }

    /* 按钮 */
    .btn-primary {
      background: var(--red);
      color: white;
      border-radius: var(--radius-btn);
      padding: 0.75rem 2rem;
      font-weight: 600;
      letter-spacing: 0.3px;
      transition: all 0.25s;
      box-shadow: 0 4px 10px rgba(229,62,62,0.25);
      display: inline-block;
      text-align: center;
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background: var(--red-deep);
      transform: translateY(-2px);
      box-shadow: 0 8px 18px rgba(229,62,62,0.35);
    }

    .btn-outline-gold {
      background: transparent;
      border: 1.5px solid var(--gold);
      color: var(--gold);
      border-radius: var(--radius-btn);
      padding: 0.75rem 2rem;
      font-weight: 600;
      backdrop-filter: blur(4px);
      transition: all 0.25s;
      display: inline-block;
      text-align: center;
    }
    .btn-outline-gold:hover {
      background: var(--gold-light);
      border-color: var(--gold);
      color: #8b7332;
    }

    /* 卡片 */
    .card {
      background: var(--white);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
      border: 1px solid rgba(0,0,0,0.02);
    }
    .card:hover {
      border-color: var(--gold);
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }

    /* 数据数字 */
    .stat-number {
      font-feature-settings: "tnum";
      font-weight: 700;
      color: var(--gold);
      letter-spacing: -0.01em;
    }

    /* 板块标题 */
    .section-title {
      font-weight: 800;
      letter-spacing: -0.02em;
      position: relative;
      display: inline-block;
      padding-left: 1rem;
    }
    .section-title::before {
      content: '';
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 4px;
      height: 24px;
      background: var(--gold);
      border-radius: 2px;
    }

    /* FAQ 手风琴 */
    .faq-item {
      background: #F9F9F7;
      border-radius: 12px;
      margin-bottom: 12px;
      transition: all 0.25s;
      border: 1px solid transparent;
    }
    .faq-item.active {
      background: white;
      border-color: var(--gold);
      box-shadow: inset 0 0 20px rgba(201,161,59,0.06);
    }
    .faq-question {
      font-weight: 600;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
    }

    /* 移动端底部导航 */
    .mobile-bottom-nav {
      display: none;
    }

    @media (max-width: 768px) {
      .desktop-nav-links {
        display: none !important;
      }
      .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: rgba(250,250,248,0.96);
        backdrop-filter: blur(20px);
        border-top: 1px solid var(--border-light);
        justify-content: space-around;
        padding: 12px 16px;
        z-index: 50;
        box-shadow: 0 -4px 10px rgba(0,0,0,0.03);
      }
      .hero-title {
        font-size: 2.2rem !important;
      }
      .stats-grid {
        grid-template-columns: repeat(2,1fr) !important;
      }
      .faq-grid {
        grid-template-columns: 1fr !important;
      }
    }
    @media (min-width: 769px) {
      .mobile-bottom-nav {
        display: none;
      }
    }