/* roulang page: index */
:root {
      --primary-green: #0E6B3E;
      --primary-green-hover: #095A33;
      --accent-gold: #F5A623;
      --bg-warm: #F7F5F0;
      --bg-dark: #1A1D20;
      --text-primary: #1A1D20;
      --text-secondary: #4B4F54;
      --text-on-dark: #FFFFFF;
      --cyan-electric: #00C2BA;
      --card-bg: #FFFFFF;
      --card-light-bg: #F0F7F2;
      --border-light: rgba(0,0,0,0.04);
      --border-dark: rgba(255,255,255,0.06);
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-hover: 0 12px 28px rgba(0,0,0,0.08);
      --radius-card: 20px;
      --radius-medium: 14px;
      --radius-btn: 30px;
      --radius-input: 10px;
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 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-primary);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease, border-color 0.2s ease;
    }
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    @media (max-width: 640px) {
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }
    }
    /* 浮动导航 Dock */
    .nav-dock {
      position: fixed;
      top: 16px;
      left: 50%;
      transform: translateX(-50%);
      width: 92%;
      max-width: 720px;
      background: rgba(255,255,255,0.88);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid rgba(0,0,0,0.05);
      border-radius: 40px;
      padding: 8px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      z-index: 50;
      transition: box-shadow 0.3s ease, background 0.3s ease;
      box-shadow: 0 4px 12px rgba(0,0,0,0.02);
    }
    .nav-dock.scrolled {
      background: rgba(255,255,255,0.96);
      box-shadow: 0 10px 25px rgba(0,0,0,0.06);
    }
    .logo-text {
      font-weight: 700;
      font-size: 1.35rem;
      letter-spacing: -0.3px;
      color: var(--primary-green);
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .logo-text i {
      font-size: 1.5rem;
      color: var(--accent-gold);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 24px;
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-primary);
    }
    .nav-links a {
      padding: 6px 2px;
      border-bottom: 2px solid transparent;
      transition: border-color 0.2s, color 0.2s;
    }
    .nav-links a:hover {
      color: var(--primary-green);
      border-bottom-color: var(--cyan-electric);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .btn-gold-capsule {
      background-color: var(--accent-gold);
      color: #1A1D20;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: 30px;
      font-size: 0.9rem;
      transition: background 0.2s, transform 0.2s;
      display: inline-block;
      white-space: nowrap;
    }
    .btn-gold-capsule:hover {
      background-color: #e6960e;
      transform: scale(1.03);
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.6rem;
      color: var(--text-primary);
      cursor: pointer;
      padding: 4px;
    }
    @media (max-width: 768px) {
      .nav-links, .nav-actions .btn-gold-capsule {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .nav-dock {
        padding: 8px 20px;
      }
    }
    /* 移动端抽屉 */
    .mobile-drawer {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(26,29,32,0.95);
      backdrop-filter: blur(10px);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 32px;
      z-index: 100;
      transform: translateY(-100%);
      transition: transform 0.35s ease;
    }
    .mobile-drawer.open {
      transform: translateY(0);
    }
    .mobile-drawer a {
      color: white;
      font-size: 1.8rem;
      font-weight: 600;
    }
    .drawer-close {
      position: absolute;
      top: 24px;
      right: 24px;
      font-size: 2rem;
      color: white;
      background: none;
      border: none;
    }
    /* 按钮系统 */
    .btn-primary {
      background-color: var(--primary-green);
      color: white;
      font-weight: 600;
      padding: 14px 32px;
      border-radius: 30px;
      display: inline-block;
      transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
      box-shadow: 0 4px 12px rgba(14,107,62,0.2);
    }
    .btn-primary:hover {
      background-color: var(--primary-green-hover);
      transform: scale(1.03);
      box-shadow: 0 8px 18px rgba(14,107,62,0.25);
    }
    .btn-outline-gold {
      border: 2px solid var(--accent-gold);
      color: var(--accent-gold);
      font-weight: 600;
      padding: 12px 30px;
      border-radius: 30px;
      display: inline-block;
      transition: background 0.2s, color 0.2s;
    }
    .btn-outline-gold:hover {
      background-color: rgba(245,166,35,0.1);
      color: #c47d0a;
    }
    .text-link {
      color: var(--primary-green);
      font-weight: 500;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      border-bottom: 2px solid transparent;
      transition: border-color 0.2s;
    }
    .text-link:hover {
      border-bottom-color: var(--cyan-electric);
    }
    /* 卡片通用 */
    .card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      border: 1px solid var(--border-light);
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--cyan-electric);
    }
    .section-gap {
      margin-top: 120px;
      margin-bottom: 120px;
    }
    @media (max-width: 1024px) {
      .section-gap {
        margin-top: 80px;
        margin-bottom: 80px;
      }
    }
    @media (max-width: 640px) {
      .section-gap {
        margin-top: 60px;
        margin-bottom: 60px;
      }
    }
    h2 {
      font-size: 2rem;
      font-weight: 700;
      letter-spacing: -0.3px;
    }
    .en-sub {
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--cyan-electric);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
    }
    .data-badge {
      background: var(--cyan-electric);
      color: white;
      font-weight: 600;
      padding: 8px 16px;
      border-radius: 20px;
      font-size: 0.85rem;
      display: inline-block;
    }