/* roulang page: index */
:root {
      --primary: #0f172a;
      --accent: #2563eb;
      --accent-hover: #1d4ed8;
      --surface: #ffffff;
      --surface-subtle: #f8fafc;
      --border-color: #e2e8f0;
      --text-main: #1e293b;
      --text-muted: #64748b;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      color: var(--text-main);
      background-color: #f1f5f9;
      line-height: 1.6;
    }
    .hero-mask {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(30, 41, 59, 0.88) 100%);
    }
    .custom-scrollbar::-webkit-scrollbar {
      width: 6px;
      height: 6px;
    }
    .custom-scrollbar::-webkit-scrollbar-track {
      background: #f1f5f9;
    }
    .custom-scrollbar::-webkit-scrollbar-thumb {
      background: #cbd5e1;
      border-radius: 3px;
    }

/* roulang page: index */
:root {
            --primary: #0284c7;
            --primary-dark: #0369a1;
            --bg-dark: #070d18;
            --card-dark: #0f172a;
            --text-main: #f1f5f9;
            --text-muted: #94a3b8;
            --border-color: #1e293b;
        }
        body {
            background-color: var(--bg-dark);
            color: var(--text-main);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            line-height: 1.6;
        }
        .hero-bg {
            background: linear-gradient(180deg, rgba(7, 13, 24, 0.75) 0%, rgba(7, 13, 24, 0.95) 100%), url('/assets/images/dd6cea2cc59027b1.webp') center/cover no-repeat;
        }
        .custom-glass {
            background: rgba(15, 23, 42, 0.75);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .code-box {
            background: #090e17;
            border-left: 3px solid #0284c7;
        }

/* roulang page: category1 */
:root {
      --primary: #0284c7;
      --primary-dark: #0369a1;
      --bg-dark: #070d18;
      --card-dark: #0f172a;
      --text-main: #f1f5f9;
      --text-muted: #94a3b8;
      --border-color: #1e293b;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      line-height: 1.6;
    }
    .hero-bg {
      background: linear-gradient(180deg, rgba(7, 13, 24, 0.82) 0%, rgba(7, 13, 24, 0.98) 100%), url('/assets/images/dd6cea2cc59027b1.webp') center/cover no-repeat;
    }
    .panel-card {
      background-color: #0f172a;
      border: 1px solid #1e293b;
      transition: all 0.25s ease;
    }
    .panel-card:hover {
      border-color: #0284c7;
      transform: translateY(-2px);
    }

/* roulang page: category2 */
:root {
      --primary: #0284c7;
      --primary-dark: #0369a1;
      --bg-dark: #070d18;
      --card-dark: #0f172a;
      --text-main: #f1f5f9;
      --text-muted: #94a3b8;
      --border-color: #1e293b;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      line-height: 1.6;
    }
    .hero-bg {
      background: linear-gradient(180deg, rgba(7, 13, 24, 0.75) 0%, rgba(7, 13, 24, 0.95) 100%), url('/assets/images/0efd66f58e68ea01.webp') center/cover no-repeat;
    }
    .doc-sidebar-sticky {
      position: sticky;
      top: 5rem;
      max-height: calc(100vh - 6rem);
    }

/* roulang page: category3 */
:root {
      --primary: #0284c7;
      --primary-dark: #0369a1;
      --bg-dark: #070d18;
      --card-dark: #0f172a;
      --text-main: #f1f5f9;
      --text-muted: #94a3b8;
      --border-color: #1e293b;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      line-height: 1.6;
    }
    .hero-bg {
      background: linear-gradient(180deg, rgba(7, 13, 24, 0.75) 0%, rgba(7, 13, 24, 0.95) 100%), url('/assets/images/dd6cea2cc59027b1.webp') center/cover no-repeat;
    }
    .status-ping {
      position: relative;
    }
    .status-ping::after {
      content: '';
      position: absolute;
      width: 100%;
      height: 100%;
      top: 0;
      left: 0;
      border-radius: 9999px;
      background-color: inherit;
      animation: ping 1.5s cubic-bezier(0, 0, 0.2, 1) infinite;
      opacity: 0.75;
    }
    @keyframes ping {
      75%, 100% {
        transform: scale(2.2);
        opacity: 0;
      }
    }

/* roulang page: category4 */
:root {
            --primary: #0284c7;
            --primary-dark: #0369a1;
            --bg-dark: #070d18;
            --card-dark: #0f172a;
            --text-main: #f1f5f9;
            --text-muted: #94a3b8;
            --border-color: #1e293b;
        }
        html { scroll-behavior: smooth; }
        body {
            background-color: var(--bg-dark);
            color: var(--text-main);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            line-height: 1.6;
        }
        .hero-bg {
            background: linear-gradient(180deg, rgba(7, 13, 24, 0.82) 0%, rgba(7, 13, 24, 0.98) 100%), url('/assets/images/4c8c0a39a4d3ece2.webp') center/cover no-repeat;
        }
        .card-panel {
            background: #0f172a;
            border: 1px solid #1e293b;
            transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
        }
        .card-panel:hover {
            border-color: #0284c7;
            box-shadow: 0 10px 25px -5px rgba(2, 132, 199, 0.15);
        }
        .glow-tag {
            background: rgba(2, 132, 199, 0.12);
            border: 1px solid rgba(2, 132, 199, 0.35);
        }