/* roulang page: index */
:root {
      --primary: #D49A2F;
      --primary-deep: #B85C3A;
      --dark: #1A1A1A;
      --light-bg: #F9F8F4;
      --white: #FFFFFF;
      --success: #2D6A4F;
      --warning: #E67E22;
      --text-dark: #1A1A1A;
      --text-soft: rgba(26, 26, 26, 0.7);
      --border-light: rgba(0,0,0,0.06);
      --shadow-card: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-card-hover: 0 16px 40px rgba(0,0,0,0.08);
      --radius-card: 24px;
      --radius-btn: 9999px;
      --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      --font-number: "Inter", "Noto Sans SC", sans-serif;
    }
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: var(--font-sans);
      background-color: var(--light-bg);
      color: var(--text-dark);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.2s ease;
    }
    button, .btn {
      cursor: pointer;
      font-family: inherit;
      transition: all 0.25s ease;
    }
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    @media (min-width: 1024px) {
      .container {
        padding-left: 2rem;
        padding-right: 2rem;
      }
    }
    .text-gradient-gold {
      background: linear-gradient(135deg, #D49A2F 0%, #B85C3A 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .btn-primary {
      background-color: var(--primary);
      color: var(--dark);
      font-weight: 700;
      border-radius: var(--radius-btn);
      padding: 0.875rem 2.25rem;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: none;
      letter-spacing: 0.5px;
      box-shadow: 0 4px 12px rgba(212, 154, 47, 0.3);
    }
    .btn-primary:hover {
      background-color: var(--primary-deep);
      color: white;
      box-shadow: 0 8px 24px rgba(184, 92, 58, 0.4);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--dark);
      color: var(--dark);
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 0.875rem 2.25rem;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-outline:hover {
      background-color: var(--dark);
      color: var(--light-bg);
      border-color: var(--dark);
    }
    .card {
      background: var(--white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: all 0.3s cubic-bezier(0.2, 0.9, 0.4, 1);
      overflow: hidden;
    }
    .card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-card-hover);
    }
    .data-badge {
      background: rgba(249, 248, 244, 0.9);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(212, 154, 47, 0.25);
      border-radius: 24px;
      padding: 1.5rem 2rem;
      text-align: center;
      box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    }
    .data-badge .number {
      font-family: var(--font-number);
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--dark);
      line-height: 1.2;
    }
    .faq-answer {
      display: none;
      padding: 0 1rem 1.5rem 1rem;
      color: var(--text-soft);
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .nav-blur {
      background: rgba(249, 248, 244, 0.8);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }
    @media (max-width: 768px) {
      .mobile-nav {
        display: none;
      }
      .mobile-nav.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background: rgba(249, 248, 244, 0.98);
        backdrop-filter: blur(20px);
        padding: 1.5rem;
        box-shadow: 0 20px 30px rgba(0,0,0,0.1);
        z-index: 50;
      }
    }