/* roulang page: index */
:root {
      --primary: #00B578;
      --primary-hover: #009663;
      --primary-light: #E8F8F2;
      --dark-slate: #0F172A;
      --dark-card: #1E293B;
      --light-bg: #F8FAFC;
      --light-alt: #F1F5F9;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --energy-amber: #F59E0B;
      --alert-red: #EF4444;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-xl: 24px;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      color: var(--text-body);
      background-color: var(--light-bg);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
    }
    .custom-shadow-hover:hover {
      box-shadow: 0 20px 25px -5px rgba(0, 181, 120, 0.1), 0 10px 10px -5px rgba(0, 181, 120, 0.04);
      transform: translateY(-3px);
    }
    .transition-base {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .badge-amber {
      background-color: #FEF3C7;
      color: #B45309;
      border: 1px solid #FDE68A;
    }
    .badge-green {
      background-color: var(--primary-light);
      color: var(--primary-hover);
      border: 1px solid #A7F3D0;
    }
    .battery-pulse {
      animation: pulseGreen 2s infinite;
    }
    @keyframes pulseGreen {
      0% { box-shadow: 0 0 0 0 rgba(0, 181, 120, 0.4); }
      70% { box-shadow: 0 0 0 12px rgba(0, 181, 120, 0); }
      100% { box-shadow: 0 0 0 0 rgba(0, 181, 120, 0); }
    }
    /* Accordion styles */
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out, padding 0.3s ease;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }