/* roulang page: index */
:root {
      --bg-main: #F8FAFC;
      --bg-dark: #0F172A;
      --brand-primary: #0A2540;
      --accent-telemetry: #00A389;
      --accent-pipeline: #2563EB;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
    }

    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    .font-mono-num {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    }

    .glass-nav {
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
    }

    .hover-lift {
      transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.2s ease;
    }
    .hover-lift:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 30px -6px rgba(15, 23, 42, 0.08);
      border-color: #CBD5E1;
    }

    /* 脉冲指示灯 */
    .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% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
      70% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
      100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
    }

    /* 手风琴原生无框架交互细节 */
    details summary::-webkit-details-marker {
      display: none;
    }
    details summary {
      list-style: none;
    }
    details[open] summary svg {
      transform: rotate(180deg);
    }

    /* 按钮交互 */
    .btn-primary {
      background-color: var(--brand-primary);
      color: #FFFFFF;
      transition: all 0.2s ease;
    }
    .btn-primary:hover {
      background-color: #163B66;
      box-shadow: 0 4px 14px rgba(10, 37, 64, 0.25);
    }
    .btn-primary:active {
      transform: scale(0.98);
    }

    .btn-accent {
      background-color: var(--accent-telemetry);
      color: #FFFFFF;
      transition: all 0.2s ease;
    }
    .btn-accent:hover {
      background-color: #008771;
      box-shadow: 0 4px 14px rgba(0, 163, 137, 0.3);
    }
    .btn-accent:active {
      transform: scale(0.98);
    }

/* roulang page: category1 */
:root {
      --bg-main: #F8FAFC;
      --bg-dark: #0F172A;
      --brand-primary: #0A2540;
      --accent-telemetry: #00A389;
      --accent-pipeline: #2563EB;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    .glass-nav {
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
    }
    .btn-primary {
      background-color: var(--brand-primary);
      color: #FFFFFF;
      transition: all 0.2s ease;
    }
    .btn-primary:hover {
      background-color: #163B66;
      box-shadow: 0 4px 14px rgba(10, 37, 64, 0.25);
    }
    .btn-primary:active {
      transform: scale(0.98);
    }
    .btn-accent {
      background-color: var(--accent-telemetry);
      color: #FFFFFF;
      transition: all 0.2s ease;
    }
    .btn-accent:hover {
      background-color: #008771;
      box-shadow: 0 4px 14px rgba(0, 163, 137, 0.3);
    }
    .btn-accent:active {
      transform: scale(0.98);
    }
    .font-mono-num {
      font-feature-settings: "tnum";
      font-variant-numeric: tabular-nums;
    }
    .card-hover {
      transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    }
    .card-hover:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 28px -6px rgba(15, 23, 42, 0.08);
      border-color: #CBD5E1;
    }
    /* 手风琴平滑旋转动画 */
    details summary svg {
      transition: transform 0.25s ease;
    }
    details[open] summary svg {
      transform: rotate(180deg);
    }

/* roulang page: category2 */
:root {
      --bg-main: #F8FAFC;
      --bg-dark: #0F172A;
      --brand-primary: #0A2540;
      --accent-telemetry: #00A389;
      --accent-pipeline: #2563EB;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    .glass-nav {
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
    }
    .btn-primary {
      background-color: var(--brand-primary);
      color: #FFFFFF;
      transition: all 0.2s ease;
    }
    .btn-primary:hover {
      background-color: #163B66;
      box-shadow: 0 4px 14px rgba(10, 37, 64, 0.25);
    }
    .btn-primary:active {
      transform: scale(0.98);
    }
    .btn-accent {
      background-color: var(--accent-telemetry);
      color: #FFFFFF;
      transition: all 0.2s ease;
    }
    .btn-accent:hover {
      background-color: #008771;
      box-shadow: 0 4px 14px rgba(0, 163, 137, 0.3);
    }
    .btn-accent:active {
      transform: scale(0.98);
    }
    .font-mono-num {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    }
    .tech-card {
      border: 1px solid var(--border-color);
      background-color: #FFFFFF;
      transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    }
    .tech-card:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.06);
      border-color: #CBD5E1;
    }
    details summary::-webkit-details-marker {
      display: none;
    }

/* roulang page: category4 */
:root {
      --bg-main: #F8FAFC;
      --bg-dark: #0F172A;
      --brand-primary: #0A2540;
      --accent-telemetry: #00A389;
      --accent-pipeline: #2563EB;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    .glass-nav {
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
    }
    .btn-primary {
      background-color: var(--brand-primary);
      color: #FFFFFF;
      transition: all 0.2s ease;
    }
    .btn-primary:hover {
      background-color: #163B66;
      box-shadow: 0 4px 14px rgba(10, 37, 64, 0.25);
    }
    .btn-primary:active {
      transform: scale(0.98);
    }
    .btn-accent {
      background-color: var(--accent-telemetry);
      color: #FFFFFF;
      transition: all 0.2s ease;
    }
    .btn-accent:hover {
      background-color: #008771;
      box-shadow: 0 4px 14px rgba(0, 163, 137, 0.3);
    }
    .btn-accent:active {
      transform: scale(0.98);
    }
    .border-subtle {
      border: 1px solid var(--border-color);
    }
    .card-hover {
      transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    }
    .card-hover:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.06);
      border-color: #CBD5E1;
    }
    .font-mono-num {
      font-variant-numeric: tabular-nums;
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    }

/* roulang page: category3 */
:root {
      --bg-main: #F8FAFC;
      --bg-dark: #0F172A;
      --brand-primary: #0A2540;
      --accent-telemetry: #00A389;
      --accent-pipeline: #2563EB;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    .glass-nav {
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
    }
    .btn-primary {
      background-color: var(--brand-primary);
      color: #FFFFFF;
      transition: all 0.2s ease;
    }
    .btn-primary:hover {
      background-color: #163B66;
      box-shadow: 0 4px 14px rgba(10, 37, 64, 0.25);
    }
    .btn-primary:active {
      transform: scale(0.98);
    }
    .btn-accent {
      background-color: var(--accent-telemetry);
      color: #FFFFFF;
      transition: all 0.2s ease;
    }
    .btn-accent:hover {
      background-color: #008771;
      box-shadow: 0 4px 14px rgba(0, 163, 137, 0.3);
    }
    .btn-accent:active {
      transform: scale(0.98);
    }
    .card-hover-effect {
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .card-hover-effect:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.06);
      border-color: #00A389;
    }
    .mono-num {
      font-feature-settings: "tnum";
      font-variant-numeric: tabular-nums;
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary svg {
      transform: rotate(180deg);
    }