/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');
    :root {
      --deep-space: #0A0E17;
      --electric-cyan: #00E5FF;
      --metallic-silver: #8A9BB5;
      --pure-white: #FFFFFF;
      --footer-bg: #05080F;
      --glass-bg: rgba(255, 255, 255, 0.03);
      --glass-border: rgba(255, 255, 255, 0.08);
      --glass-blur: blur(20px);
      --card-radius: 16px;
      --btn-radius: 12px;
      --glow-shadow: 0 0 20px rgba(0, 229, 255, 0.4);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'SF Pro Display', sans-serif;
      background-color: var(--deep-space);
      color: var(--pure-white);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    a, button, input {
      font-family: inherit;
      transition: all 0.25s ease;
    }
    img {
      max-width: 100%;
      display: block;
    }
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    /* 玻璃拟态卡片 */
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: var(--glass-blur);
      -webkit-backdrop-filter: var(--glass-blur);
      border: 1px solid var(--glass-border);
      border-radius: var(--card-radius);
    }
    /* 电光青按钮 */
    .btn-glow {
      background-color: var(--electric-cyan);
      color: #000;
      font-weight: 700;
      border-radius: var(--btn-radius);
      box-shadow: var(--glow-shadow);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all 0.3s ease;
      border: none;
      cursor: pointer;
    }
    .btn-glow:hover {
      box-shadow: 0 0 30px rgba(0, 229, 255, 0.7);
      transform: translateY(-2px);
    }
    .btn-outline-glow {
      background: transparent;
      border: 2px solid var(--electric-cyan);
      color: var(--electric-cyan);
      font-weight: 600;
      border-radius: var(--btn-radius);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all 0.3s ease;
      cursor: pointer;
    }
    .btn-outline-glow:hover {
      background: rgba(0, 229, 255, 0.1);
      box-shadow: 0 0 15px rgba(0, 229, 255, 0.3);
    }
    /* 板块标题装饰条 */
    .section-title {
      display: flex;
      align-items: center;
      gap: 1rem;
      margin-bottom: 2.5rem;
    }
    .section-title::before {
      content: '';
      width: 4px;
      height: 32px;
      background: var(--electric-cyan);
      border-radius: 2px;
      box-shadow: 0 0 12px rgba(0, 229, 255, 0.6);
    }
    /* 导航样式 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      box-shadow: 0 1px 8px rgba(0,0,0,0.08);
      z-index: 50;
    }
    .nav-link {
      color: #333;
      font-weight: 500;
      position: relative;
      padding: 0.5rem 0;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--electric-cyan);
      transition: width 0.25s ease;
    }
    .nav-link:hover::after,
    .nav-link.active::after {
      width: 100%;
    }
    /* 背景网格动画 */
    .hero-grid-bg {
      background-image: linear-gradient(rgba(0, 229, 255, 0.06) 1px, transparent 1px),
                        linear-gradient(90deg, rgba(0, 229, 255, 0.06) 1px, transparent 1px);
      background-size: 60px 60px;
      animation: gridMove 15s linear infinite;
    }
    @keyframes gridMove {
      0% { background-position: 0 0; }
      100% { background-position: 60px 60px; }
    }
    /* FAQ 折叠动画 */
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.4s ease;
    }
    .faq-item.open .faq-content {
      max-height: 200px;
      padding-top: 1rem;
      padding-bottom: 0.5rem;
    }
    .faq-icon {
      transition: transform 0.3s ease;
    }
    .faq-item.open .faq-icon {
      transform: rotate(45deg);
    }
    /* 响应式断点覆盖 */
    @media (max-width: 768px) {
      .navbar .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-content {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 520px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 2.5rem;
      }
    }