/* roulang page: index */
:root {
      --deep-ink: #1a1410;
      --matte-copper: #c8a27a;
      --jade-green: #2ecc71;
      --warm-bg: #faf7f2;
      --card-bg: #ffffff;
      --border-subtle: rgba(26, 20, 16, 0.06);
      --shadow-sm: 0 4px 24px rgba(26, 20, 16, 0.04);
      --shadow-hover: 0 12px 32px rgba(26, 20, 16, 0.08);
      --radius-lg: 16px;
      --radius-pill: 50px;
      --transition-smooth: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      background-color: var(--warm-bg);
      color: #2c2c2c;
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }
    h1, h2, h3, h4, p, ul {
      margin: 0;
    }
    img {
      max-width: 100%;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s;
    }
    .container-custom {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 32px;
      padding-right: 32px;
    }
    /* 浮动Dock导航 */
    .nav-dock {
      position: fixed;
      top: 24px;
      left: 50%;
      transform: translateX(-50%);
      width: calc(100% - 48px);
      max-width: 1100px;
      background: rgba(26, 20, 16, 0.88);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-radius: 40px;
      padding: 8px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      z-index: 50;
      box-shadow: 0 10px 30px rgba(0,0,0,0.2);
      transition: background 0.3s;
    }
    .nav-dock.scrolled {
      background: rgba(26, 20, 16, 0.96);
    }
    .logo-text {
      font-size: 22px;
      font-weight: 700;
      color: var(--matte-copper);
      letter-spacing: 1px;
      white-space: nowrap;
    }
    .nav-links {
      display: flex;
      gap: 28px;
      font-weight: 500;
      color: #e0d7cd;
      font-size: 15px;
    }
    .nav-links a {
      color: #e0d7cd;
      padding: 4px 0;
      border-bottom: 2px solid transparent;
      transition: 0.2s;
    }
    .nav-links a:hover {
      color: #ffffff;
      border-bottom-color: var(--matte-copper);
    }
    .btn-pill {
      background: var(--matte-copper);
      color: white;
      border: none;
      padding: 10px 24px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      font-size: 15px;
      cursor: pointer;
      transition: 0.25s;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      white-space: nowrap;
    }
    .btn-pill:hover {
      background: #b8956a;
      transform: scale(1.03);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--matte-copper);
      color: var(--matte-copper);
      padding: 10px 26px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      transition: 0.25s;
    }
    .btn-outline:hover {
      background: var(--matte-copper);
      color: white;
    }
    /* 卡片系统 */
    .card-modern {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-subtle);
      box-shadow: var(--shadow-sm);
      transition: var(--transition-smooth);
      padding: 32px;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .card-modern:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .stat-number {
      font-feature-settings: "tnum";
      font-variant-numeric: tabular-nums;
    }
    /* FAQ折叠 */
    .faq-item {
      border-bottom: 1px solid rgba(0,0,0,0.05);
      padding: 20px 0;
    }
    .faq-question {
      font-weight: 600;
      font-size: 18px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: #5c5c5c;
      margin-top: 0;
    }
    .faq-item.open .faq-answer {
      max-height: 180px;
      margin-top: 16px;
    }
    .faq-icon {
      font-size: 22px;
      color: var(--matte-copper);
      transition: 0.2s;
    }
    /* 移动端底部导航 */
    @media (max-width: 768px) {
      .container-custom {
        padding-left: 20px;
        padding-right: 20px;
      }
      .nav-dock {
        top: auto;
        bottom: 16px;
        width: calc(100% - 32px);
        border-radius: 36px;
        padding: 6px 20px;
        background: rgba(26, 20, 16, 0.92);
      }
      .nav-links {
        gap: 18px;
        font-size: 13px;
      }
      .desktop-only {
        display: none;
      }
      h1 {
        font-size: 38px !important;
      }
      h2 {
        font-size: 32px !important;
      }
    }
    @media (min-width: 769px) {
      .mobile-only {
        display: none;
      }
    }
    .glass-card {
      background: rgba(255,255,255,0.06);
      backdrop-filter: blur(10px);
      border-radius: 20px;
      border: 1px solid rgba(255,255,255,0.1);
    }
    .separator {
      height: 1px;
      background: linear-gradient(to right, transparent, #c8a27a60, transparent);
      margin: 24px 0;
    }