/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');
    :root {
      --primary: #0B1A2F;
      --primary-dark: #060F1A;
      --accent: #FF6B35;
      --accent-hover: #FF7F50;
      --glow: #00E5FF;
      --text-primary: #FFFFFF;
      --text-secondary: #B0C4DE;
      --text-muted: #6B7B8D;
      --glass-bg: rgba(255, 255, 255, 0.03);
      --glass-border: rgba(255, 255, 255, 0.08);
      --glass-hover-border: rgba(0, 229, 255, 0.25);
      --card-shadow: 0 8px 32px rgba(0,0,0,0.4);
      --card-hover-shadow: 0 12px 40px rgba(0,229,255,0.15);
      --btn-glow: 0 0 20px rgba(255,107,53,0.5);
    }
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      background: #0B1A2F;
      color: var(--text-secondary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      background-image: linear-gradient(135deg, #0B1A2F 0%, #0F243B 50%, #0B1A2F 100%);
    }
    h1, h2, h3, h4, h5, h6 {
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      color: var(--text-primary);
      font-weight: 700;
      letter-spacing: -0.3px;
    }
    h1 {
      font-size: 36px;
      line-height: 1.2;
      font-weight: 800;
    }
    h2 {
      font-size: 24px;
      line-height: 1.3;
    }
    h3 {
      font-size: 18px;
      line-height: 1.4;
      font-weight: 600;
    }
    .text-accent {
      color: var(--accent);
    }
    .text-glow {
      color: var(--glow);
    }
    .font-inter {
      font-family: "Inter", "SF Pro Display", sans-serif;
    }
    .container-custom {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    /* 玻璃拟态卡片 */
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: 16px;
      box-shadow: var(--card-shadow);
      transition: all 0.3s ease;
    }
    .glass-card:hover {
      transform: translateY(-4px);
      border-color: var(--glass-hover-border);
      box-shadow: var(--card-hover-shadow);
    }
    /* 按钮系统 */
    .btn-primary {
      background-color: var(--accent);
      color: white;
      font-weight: 600;
      padding: 14px 32px;
      border-radius: 8px;
      display: inline-block;
      text-align: center;
      transition: all 0.3s ease;
      border: none;
      cursor: pointer;
      text-decoration: none;
      letter-spacing: 0.3px;
      box-shadow: 0 4px 12px rgba(255,107,53,0.3);
    }
    .btn-primary:hover {
      background-color: var(--accent-hover);
      box-shadow: var(--btn-glow);
      transform: translateY(-1px);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--glow);
      color: var(--glow);
      font-weight: 600;
      padding: 14px 32px;
      border-radius: 8px;
      display: inline-block;
      text-align: center;
      transition: all 0.3s ease;
      cursor: pointer;
      text-decoration: none;
    }
    .btn-outline:hover {
      background: rgba(0,229,255,0.1);
      border-color: #33EAFF;
      color: #fff;
    }
    .btn-glass {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.12);
      color: white;
      padding: 12px 24px;
      border-radius: 8px;
      transition: all 0.3s;
      display: inline-block;
      text-decoration: none;
    }
    .btn-glass:hover {
      background: rgba(255,255,255,0.1);
      border-color: rgba(255,255,255,0.25);
      color: white;
    }
    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 50;
      background: rgba(11, 26, 47, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .nav-link {
      color: var(--text-secondary);
      font-weight: 500;
      position: relative;
      transition: color 0.2s;
      text-decoration: none;
    }
    .nav-link:hover {
      color: white;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--glow);
      transition: width 0.3s;
    }
    .nav-link:hover::after {
      width: 100%;
    }
    .mobile-menu {
      display: none;
    }
    /* 粒子动画 */
    @keyframes float {
      0% { transform: translateY(0px); opacity: 0.8; }
      50% { transform: translateY(-20px); opacity: 1; }
      100% { transform: translateY(0px); opacity: 0.8; }
    }
    .particle {
      position: absolute;
      width: 4px;
      height: 4px;
      background: var(--glow);
      border-radius: 50%;
      box-shadow: 0 0 12px var(--glow);
      animation: float 4s infinite ease-in-out;
    }
    /* FAQ 手风琴 */
    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }
    .faq-question {
      background: rgba(255,255,255,0.03);
      padding: 16px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: white;
      font-weight: 600;
      transition: background 0.2s;
    }
    .faq-question:hover {
      background: rgba(255,255,255,0.06);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s;
      background: rgba(255,255,255,0.02);
      color: var(--text-secondary);
      padding-left: 16px;
      padding-right: 16px;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-top: 16px;
      padding-bottom: 16px;
      border-top: 1px solid rgba(255,255,255,0.05);
    }
    .faq-icon {
      font-size: 20px;
      color: var(--glow);
      transition: transform 0.3s;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    /* 响应式断点 */
    @media (max-width: 1024px) {
      h1 { font-size: 32px; }
      h2 { font-size: 22px; }
    }
    @media (max-width: 768px) {
      .desktop-nav { display: none; }
      .mobile-menu { display: block; }
      .container-custom { padding-left: 16px; padding-right: 16px; }
      h1 { font-size: 28px; }
      h2 { font-size: 20px; }
      .grid-cols-3-mobile { grid-template-columns: 1fr; }
    }
    @media (max-width: 640px) {
      .hero-text { text-align: center; }
      .hero-buttons { justify-content: center; }
    }