/* roulang page: index */
:root {
      --primary: #10b981;
      --primary-dark: #059669;
      --bg-dark: #0f172a;
      --bg-light: #f8fafc;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
    }
    body {
      font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: var(--text-main);
      background-color: var(--bg-light);
      -webkit-font-smoothing: antialiased;
    }
    .font-num {
      font-family: 'Inter', -apple-system, sans-serif;
    }
    .hero-bg-overlay {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(15, 23, 42, 0.82) 100%);
    }
    .tech-border {
      border: 1px solid rgba(226, 232, 240, 0.8);
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .tech-border:hover {
      border-color: #10b981;
      box-shadow: 0 10px 25px -5px rgba(16, 185, 129, 0.1), 0 8px 10px -6px rgba(16, 185, 129, 0.1);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .accordion-content.open {
      max-height: 280px;
    }