/* roulang page: index */
:root {
      --accent: #F97316;
      --accent-hover: #EA580C;
      --dark: #1E293B;
      --slate: #64748B;
      --success: #10B981;
      --bg-light: #F8FAFC;
      --white: #FFFFFF;
      --border-light: #E2E8F0;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.06);
      --radius-card: 20px;
      --radius-btn: 12px;
      --radius-pill: 40px;
    }

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

    body {
      font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
      background-color: var(--white);
      color: var(--dark);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    /* 自定义组件与覆盖 */
    .capsule-nav {
      background: rgba(255, 255, 255, 0.8);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid rgba(255, 255, 255, 0.5);
      box-shadow: var(--shadow-sm);
      border-radius: var(--radius-pill);
      padding: 0.5rem 1.5rem;
      transition: all 0.3s ease;
    }

    .capsule-nav.scrolled {
      background: rgba(255, 255, 255, 0.95);
      box-shadow: var(--shadow-md);
    }

    .btn-primary {
      background-color: var(--accent);
      color: white;
      border-radius: var(--radius-btn);
      padding: 0.75rem 2rem;
      font-weight: 600;
      transition: all 0.25s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 10px rgba(249, 115, 22, 0.3);
      border: none;
      cursor: pointer;
      letter-spacing: -0.01em;
    }

    .btn-primary:hover {
      background-color: var(--accent-hover);
      box-shadow: 0 10px 20px rgba(249, 115, 22, 0.4);
      transform: translateY(-1px);
    }

    .btn-primary:active {
      transform: scale(0.98);
    }

    .btn-ghost {
      background: transparent;
      border: 1.5px solid var(--accent);
      color: var(--accent);
      border-radius: var(--radius-btn);
      padding: 0.7rem 2rem;
      font-weight: 600;
      transition: all 0.25s ease;
    }

    .btn-ghost:hover {
      background-color: rgba(249, 115, 22, 0.05);
    }

    .card-hover {
      transition: all 0.3s ease;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      background: white;
      box-shadow: var(--shadow-sm);
    }

    .card-hover:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(249, 115, 22, 0.2);
    }

    .accent-text {
      color: var(--accent);
    }

    .number-stat {
      font-weight: 800;
      letter-spacing: -0.03em;
      font-size: 2.8rem;
      line-height: 1.2;
    }

    .faq-item {
      border-bottom: 1px solid var(--border-light);
      transition: all 0.3s ease;
    }

    .faq-question {
      background-color: var(--bg-light);
      padding: 1.2rem 1.5rem;
      border-radius: 16px;
      cursor: pointer;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: background 0.2s;
    }

    .faq-question:hover {
      background-color: #f1f5f9;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.4s ease;
      padding: 0 1.5rem;
      color: var(--slate);
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 1rem 1.5rem 1.5rem;
    }

    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }

    /* 背景装饰 */
    .hero-bg-pattern {
      background-image: radial-gradient(circle at 20% 30%, rgba(249, 115, 22, 0.03) 0%, transparent 35%);
    }

    @media (max-width: 768px) {
      .capsule-nav {
        padding: 0.5rem 1rem;
      }
      .number-stat {
        font-size: 2.2rem;
      }
    }