/* roulang page: index */
/* 自定义CSS变量与深度视觉定制，超越默认Tailwind */
    :root {
      --deep-space: #0A0E27;
      --cyan-energy: #00F0FF;
      --magenta-pulse: #FF3CAC;
      --glass-bg: rgba(255, 255, 255, 0.04);
      --glass-border: rgba(0, 240, 255, 0.15);
      --glass-border-hover: rgba(0, 240, 255, 0.5);
      --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
      --text-primary: #FFFFFF;
      --text-secondary: rgba(255, 255, 255, 0.75);
      --text-muted: rgba(255, 255, 255, 0.4);
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --radius-full: 50px;
      --transition-smooth: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1.2);
    }

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

    body {
      background-color: var(--deep-space);
      color: var(--text-primary);
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Inter', system-ui, -apple-system, sans-serif;
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    /* 自定义容器 */
    .container-custom {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 玻璃卡片效果 */
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(12px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      box-shadow: var(--card-shadow);
      transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
    }
    .glass-card:hover {
      border-color: var(--glass-border-hover);
      transform: translateY(-4px);
      box-shadow: 0 16px 40px rgba(0, 240, 255, 0.15);
    }

    /* 数据徽章组件 */
    .badge-data {
      background: rgba(0, 240, 255, 0.08);
      border-radius: var(--radius-md);
      padding: 16px;
      border-left: 3px solid var(--cyan-energy);
      display: flex;
      flex-direction: column;
      gap: 4px;
    }
    .badge-data .number {
      font-family: 'Inter', 'PingFang SC', sans-serif;
      font-size: 28px;
      font-weight: 900;
      line-height: 1.2;
      color: var(--cyan-energy);
    }
    .badge-data .unit {
      font-size: 14px;
      font-weight: 400;
      color: var(--text-secondary);
    }

    /* 渐变胶囊按钮 */
    .btn-glow {
      background: linear-gradient(135deg, var(--cyan-energy), var(--magenta-pulse));
      border: none;
      border-radius: var(--radius-full);
      color: white;
      font-weight: 700;
      padding: 12px 28px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: all var(--transition-smooth);
      box-shadow: 0 4px 15px rgba(0, 240, 255, 0.3);
      text-decoration: none;
      letter-spacing: 0.5px;
    }
    .btn-glow:hover {
      transform: scale(1.05);
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.6), 0 0 15px rgba(255, 60, 172, 0.4);
    }

    .btn-outline-cyan {
      background: transparent;
      border: 1px solid var(--cyan-energy);
      color: var(--cyan-energy);
      border-radius: var(--radius-full);
      padding: 10px 24px;
      font-weight: 600;
      transition: all var(--transition-smooth);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      text-decoration: none;
    }
    .btn-outline-cyan:hover {
      background: rgba(0, 240, 255, 0.1);
      border-color: var(--magenta-pulse);
      color: var(--magenta-pulse);
    }

    /* 导航样式 */
    .nav-blur {
      background: rgba(10, 14, 39, 0.85);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(0, 240, 255, 0.1);
    }
    .nav-link {
      color: var(--text-secondary);
      font-weight: 500;
      transition: color 0.2s;
      position: relative;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--cyan-energy);
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--cyan-energy);
    }

    /* hero网格背景动画 */
    .hero-bg-pattern {
      background-image: 
        linear-gradient(rgba(0, 240, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 240, 255, 0.05) 1px, transparent 1px);
      background-size: 40px 40px;
      background-position: center center;
    }

    /* 手风琴样式 */
    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.1);
      transition: all 0.3s;
    }
    .faq-question {
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 18px 0;
      font-weight: 600;
      color: white;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      color: var(--text-secondary);
      font-size: 15px;
      line-height: 1.6;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-bottom: 16px;
    }
    .faq-icon {
      color: var(--cyan-energy);
      font-size: 18px;
    }

    /* 输入框样式 */
    .input-dark {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.2);
      border-radius: var(--radius-sm);
      padding: 12px 16px;
      color: white;
      width: 100%;
      transition: border 0.2s;
    }
    .input-dark:focus {
      outline: none;
      border-color: var(--cyan-energy);
      box-shadow: 0 0 10px rgba(0,240,255,0.2);
    }
    .input-dark::placeholder {
      color: rgba(255,255,255,0.3);
    }

    /* 移动端底部导航 */
    .mobile-bottom-nav {
      background: rgba(10, 14, 39, 0.95);
      backdrop-filter: blur(20px);
      border-radius: 28px;
      padding: 8px 16px;
      display: flex;
      justify-content: space-around;
      position: fixed;
      bottom: 16px;
      left: 16px;
      right: 16px;
      z-index: 50;
      border: 1px solid rgba(0,240,255,0.2);
    }