/* roulang page: index */
:root {
      --primary: #FF6A00;
      --primary-hover: #FF8A2E;
      --secondary: #8B2FFF;
      --secondary-hover: #A855F7;
      --bg-dark: #0A0A0F;
      --bg-card: #1A1A24;
      --bg-section-alt: #12121A;
      --text-main: #FFFFFF;
      --text-body: #B0B0C0;
      --text-muted: #6B6B7B;
      --border-light: rgba(255,255,255,0.08);
      --radius-card: 20px;
      --radius-btn: 999px;
      --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
      --shadow-hover: 0 16px 48px rgba(139,47,255,0.15);
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Inter', system-ui, -apple-system, sans-serif;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-dark);
      color: var(--text-body);
      margin: 0;
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 50;
      transition: background-color 0.3s ease, box-shadow 0.3s ease;
      background-color: transparent;
    }
    .navbar.scrolled {
      background-color: rgba(10,10,15,0.95);
      box-shadow: 0 1px 0 0 rgba(139,47,255,0.3);
    }
    .nav-link {
      color: #d1d1d1;
      font-weight: 500;
      transition: color 0.2s;
      font-size: 0.95rem;
    }
    .nav-link:hover {
      color: var(--secondary);
    }
    .btn-primary {
      background-color: var(--primary);
      color: white;
      border-radius: var(--radius-btn);
      padding: 0.6rem 1.8rem;
      font-weight: 600;
      transition: all 0.25s;
      border: none;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(255,106,0,0.3);
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 0 20px rgba(255,106,0,0.5);
      transform: translateY(-1px);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid white;
      color: white;
      border-radius: var(--radius-btn);
      padding: 0.6rem 1.8rem;
      font-weight: 600;
      transition: all 0.25s;
      cursor: pointer;
    }
    .btn-outline:hover {
      border-color: var(--secondary);
      background-color: rgba(139,47,255,0.15);
      color: #f0f0ff;
    }
    .btn-white {
      background-color: white;
      color: var(--primary);
      border-radius: var(--radius-btn);
      padding: 0.75rem 2.5rem;
      font-weight: 700;
      transition: all 0.25s;
      border: none;
      cursor: pointer;
      box-shadow: 0 6px 18px rgba(0,0,0,0.2);
    }
    .btn-white:hover {
      background-color: #f3f3f3;
    }
    /* 移动菜单 */
    .mobile-menu {
      background-color: rgba(10,10,15,0.98);
      backdrop-filter: blur(12px);
    }
    .card-hover {
      transition: transform 0.25s, box-shadow 0.3s;
    }
    .card-hover:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .gradient-text {
      background: linear-gradient(135deg, #FF6A00, #8B2FFF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .badge-number {
      font-weight: 800;
      color: var(--primary);
    }
    .section-padding {
      padding-top: 5rem;
      padding-bottom: 5rem;
    }
    @media (max-width: 768px) {
      .section-padding {
        padding-top: 3.5rem;
        padding-bottom: 3.5rem;
      }
    }
    .faq-answer {
      background-color: var(--bg-card);
      border-radius: 8px;
      padding: 0 1rem;
      margin-top: 0.5rem;
    }
    .marquee-track {
      display: flex;
      animation: scroll 25s linear infinite;
      width: max-content;
    }
    @keyframes scroll {
      0% { transform: translateX(0); }
      100% { transform: translateX(-50%); }
    }