/* roulang page: index */
:root {
      --brand-blue: #0B63E5;
      --brand-cyan: #00D2B4;
      --brand-dark: #0A0F1D;
      --brand-amber: #F59E0B;
      --card-bg-light: #FFFFFF;
      --card-border: rgba(226, 232, 240, 0.9);
    }
    
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: #F8FAFC;
      color: #0F172A;
      overflow-x: hidden;
    }

    .brand-gradient-text {
      background: linear-gradient(135deg, #0B63E5 0%, #00D2B4 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .brand-gradient-bg {
      background: linear-gradient(135deg, #0B63E5 0%, #00D2B4 100%);
    }

    .brand-gradient-border {
      border-image: linear-gradient(135deg, #0B63E5, #00D2B4) 1;
    }

    .card-hover-effect {
      transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .card-hover-effect:hover {
      transform: translateY(-6px);
      box-shadow: 0 20px 35px -10px rgba(11, 99, 229, 0.12);
    }

    .dark-card-hover:hover {
      transform: translateY(-6px);
      box-shadow: 0 20px 35px -10px rgba(0, 210, 180, 0.15);
    }

    .pulse-dot {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: #10B981;
      box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
      animation: pulse-ring 2s infinite;
    }

    @keyframes pulse-ring {
      0% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
      }
      70% {
        transform: scale(1);
        box-shadow: 0 0 0 6px rgba(16, 185, 129, 0);
      }
      100% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
      }
    }

    /* Accordion transitions */
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out, padding 0.3s ease;
    }
    .faq-content.open {
      max-height: 500px;
    }