/* roulang page: index */
:root {
      --primary: #059669;
      --primary-light: #10b981;
      --primary-dark: #047857;
      --bg-base: #f8fafc;
      --bg-surface: #ffffff;
      --text-main: #0f172a;
      --text-muted: #64748b;
      --border-soft: #e2e8f0;
      --radius-ui: 0.75rem;
      --shadow-tech: 0 4px 20px -2px rgba(15, 23, 42, 0.06), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
    }
    
    body {
      background-color: var(--bg-base);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
    }

    .pulse-dot {
      animation: pulseGlow 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
    }
    @keyframes pulseGlow {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.85); }
    }

    .glass-card {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-soft);
    }

    .tab-btn.active {
      background-color: #059669;
      color: #ffffff;
      border-color: #059669;
    }

    .accordion-content {
      transition: max-height 0.3s ease-out, opacity 0.3s ease-out;
      max-height: 0;
      overflow: hidden;
      opacity: 0;
    }
    .accordion-item.active .accordion-content {
      max-height: 400px;
      opacity: 1;
    }
    .accordion-item.active .accordion-icon {
      transform: rotate(180deg);
    }