/* roulang page: index */
:root {
      --primary: #1E40AF;
      --primary-hover: #1D4ED8;
      --primary-light: #EFF6FF;
      --accent: #0284C7;
      --accent-navy: #0F172A;
      --bg-base: #FFFFFF;
      --bg-subtle: #F8FAFC;
      --bg-muted: #F1F5F9;
      --border-color: #E2E8F0;
      --text-main: #0F172A;
      --text-muted: #475569;
      --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
      --shadow-card: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.02);
      --shadow-hover: 0 12px 30px -4px rgba(30, 64, 175, 0.12), 0 4px 10px -2px rgba(15, 23, 42, 0.04);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --radius-xl: 24px;
    }

    body {
      font-family: 'Plus Jakarta Sans', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      color: var(--text-main);
      background-color: var(--bg-base);
      line-height: 1.75;
      letter-spacing: -0.01em;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, h5, h6 {
      letter-spacing: -0.025em;
      font-weight: 700;
      color: var(--accent-navy);
    }

    .custom-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      transition: transform 0.24s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.24s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.24s ease;
    }
    .custom-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
      border-color: #CBD5E1;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      font-weight: 600;
      border-radius: var(--radius-md);
      transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 4px 14px rgba(30, 64, 175, 0.3);
      transform: translateY(-1px);
    }
    .btn-primary:active {
      transform: translateY(0);
      box-shadow: none;
    }
    .btn-primary:focus-visible {
      outline: none;
      ring: 2px solid var(--accent);
    }

    .btn-secondary {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      color: var(--text-main);
      font-weight: 600;
      border-radius: var(--radius-md);
      transition: all 0.2s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-secondary:hover {
      background-color: var(--bg-subtle);
      border-color: #CBD5E1;
      color: var(--primary);
    }

    .metric-badge {
      font-family: 'Plus Jakarta Sans', monospace;
      font-variant-numeric: tabular-nums;
    }

    .accordion-item[open] .accordion-icon {
      transform: rotate(180deg);
    }

    .tab-btn.active {
      background-color: #FFFFFF;
      color: var(--primary);
      box-shadow: var(--shadow-sm);
      border-color: var(--border-color);
    }

    /* 滚动条平滑 */
    html {
      scroll-behavior: smooth;
    }

/* roulang page: category2 */
:root {
      --primary: #1E40AF;
      --primary-hover: #1D4ED8;
      --primary-light: #EFF6FF;
      --accent: #0284C7;
      --accent-navy: #0F172A;
      --bg-base: #FFFFFF;
      --bg-subtle: #F8FAFC;
      --bg-muted: #F1F5F9;
      --border-color: #E2E8F0;
      --text-main: #0F172A;
      --text-muted: #475569;
      --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
      --shadow-card: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.02);
      --shadow-hover: 0 12px 30px -4px rgba(30, 64, 175, 0.12), 0 4px 10px -2px rgba(15, 23, 42, 0.04);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --radius-xl: 24px;
    }
    body {
      font-family: 'Plus Jakarta Sans', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      color: var(--text-main);
      background-color: var(--bg-base);
      line-height: 1.75;
      letter-spacing: -0.01em;
      -webkit-font-smoothing: antialiased;
    }
    .custom-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      transition: transform 0.24s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.24s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.24s ease;
    }
    .custom-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
      border-color: #CBD5E1;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      font-weight: 600;
      border-radius: var(--radius-md);
      transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 4px 14px rgba(30, 64, 175, 0.3);
      transform: translateY(-1px);
    }
    .btn-primary:active {
      transform: translateY(0);
      box-shadow: none;
    }
    .btn-primary:focus-visible {
      outline: none;
      box-shadow: 0 0 0 2px #FFFFFF, 0 0 0 4px var(--accent);
    }
    .btn-secondary {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      color: var(--text-main);
      font-weight: 600;
      border-radius: var(--radius-md);
      transition: all 0.2s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-secondary:hover {
      background-color: var(--bg-subtle);
      border-color: #CBD5E1;
      color: var(--primary);
    }
    .btn-secondary:active {
      transform: translateY(0);
    }
    .btn-secondary:focus-visible {
      outline: none;
      box-shadow: 0 0 0 2px #FFFFFF, 0 0 0 4px var(--primary);
    }
    .metric-badge {
      font-family: 'Plus Jakarta Sans', monospace;
      font-variant-numeric: tabular-nums;
    }
    .spec-table-row:nth-child(even) {
      background-color: #F8FAFC;
    }
    html {
      scroll-behavior: smooth;
    }

/* roulang page: category1 */
:root {
            --primary: #1E40AF;
            --primary-hover: #1D4ED8;
            --primary-light: #EFF6FF;
            --accent: #0284C7;
            --accent-navy: #0F172A;
            --bg-base: #FFFFFF;
            --bg-subtle: #F8FAFC;
            --bg-muted: #F1F5F9;
            --border-color: #E2E8F0;
            --text-main: #0F172A;
            --text-muted: #475569;
            --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
            --shadow-card: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.02);
            --shadow-hover: 0 12px 30px -4px rgba(30, 64, 175, 0.12), 0 4px 10px -2px rgba(15, 23, 42, 0.04);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 24px;
        }
        body {
            font-family: 'Plus Jakarta Sans', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-main);
            background-color: var(--bg-base);
            line-height: 1.75;
            letter-spacing: -0.01em;
            -webkit-font-smoothing: antialiased;
        }
        .custom-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: transform 0.24s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.24s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.24s ease;
        }
        .custom-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: #CBD5E1;
        }
        .btn-primary {
            background-color: var(--primary);
            color: #FFFFFF;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        .btn-primary:hover {
            background-color: var(--primary-hover);
            box-shadow: 0 4px 14px rgba(30, 64, 175, 0.3);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn-primary:focus-visible {
            outline: none;
            box-shadow: 0 0 0 2px #FFFFFF, 0 0 0 4px var(--accent);
        }
        .btn-secondary {
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            color: var(--text-main);
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: all 0.2s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        .btn-secondary:hover {
            background-color: var(--bg-subtle);
            border-color: #CBD5E1;
            color: var(--primary);
        }
        .metric-badge {
            font-family: 'Plus Jakarta Sans', monospace;
            font-variant-numeric: tabular-nums;
        }
        .filter-tag.active {
            background-color: var(--primary);
            color: #FFFFFF;
            border-color: var(--primary);
        }
        html {
            scroll-behavior: smooth;
        }

/* roulang page: category4 */
:root {
      --primary: #1E40AF;
      --primary-hover: #1D4ED8;
      --primary-light: #EFF6FF;
      --accent: #0284C7;
      --accent-navy: #0F172A;
      --bg-base: #FFFFFF;
      --bg-subtle: #F8FAFC;
      --bg-muted: #F1F5F9;
      --border-color: #E2E8F0;
      --text-main: #0F172A;
      --text-muted: #475569;
      --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
      --shadow-card: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.02);
      --shadow-hover: 0 12px 30px -4px rgba(30, 64, 175, 0.12), 0 4px 10px -2px rgba(15, 23, 42, 0.04);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --radius-xl: 24px;
    }
    body {
      font-family: 'Plus Jakarta Sans', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      color: var(--text-main);
      background-color: var(--bg-base);
      line-height: 1.75;
      letter-spacing: -0.01em;
      -webkit-font-smoothing: antialiased;
    }
    .custom-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      transition: transform 0.24s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.24s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.24s ease;
    }
    .custom-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
      border-color: #CBD5E1;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      font-weight: 600;
      border-radius: var(--radius-md);
      transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 4px 14px rgba(30, 64, 175, 0.3);
      transform: translateY(-1px);
    }
    .btn-primary:active {
      transform: translateY(0);
      box-shadow: none;
    }
    .btn-primary:focus-visible {
      outline: none;
      box-shadow: 0 0 0 2px var(--accent);
    }
    .btn-secondary {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      color: var(--text-main);
      font-weight: 600;
      border-radius: var(--radius-md);
      transition: all 0.2s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-secondary:hover {
      background-color: var(--bg-subtle);
      border-color: #CBD5E1;
      color: var(--primary);
    }
    .metric-badge {
      font-family: 'Plus Jakarta Sans', monospace;
      font-variant-numeric: tabular-nums;
    }
    html {
      scroll-behavior: smooth;
    }

/* roulang page: category3 */
:root {
    --primary: #1E40AF;
    --primary-hover: #1D4ED8;
    --primary-light: #EFF6FF;
    --accent: #0284C7;
    --accent-navy: #0F172A;
    --bg-base: #FFFFFF;
    --bg-subtle: #F8FAFC;
    --bg-muted: #F1F5F9;
    --border-color: #E2E8F0;
    --text-main: #0F172A;
    --text-muted: #475569;
    --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
    --shadow-card: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.02);
    --shadow-hover: 0 12px 30px -4px rgba(30, 64, 175, 0.12), 0 4px 10px -2px rgba(15, 23, 42, 0.04);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
  }
  body {
    font-family: 'Plus Jakarta Sans', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-main);
    background-color: var(--bg-base);
    line-height: 1.75;
    letter-spacing: -0.01em;
    -webkit-font-smoothing: antialiased;
  }
  .custom-card {
    background: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    transition: transform 0.24s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.24s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.24s ease;
  }
  .custom-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
    border-color: #CBD5E1;
  }
  .btn-primary {
    background-color: var(--primary);
    color: #FFFFFF;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 4px 14px rgba(30, 64, 175, 0.3);
    transform: translateY(-1px);
  }
  .btn-primary:active {
    transform: translateY(0);
    box-shadow: none;
  }
  .btn-primary:focus-visible {
    outline: none;
    ring: 2px solid var(--accent);
  }
  .btn-secondary {
    background-color: #FFFFFF;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .btn-secondary:hover {
    background-color: var(--bg-subtle);
    border-color: #CBD5E1;
    color: var(--primary);
  }
  .metric-badge {
    font-family: 'Plus Jakarta Sans', monospace;
    font-variant-numeric: tabular-nums;
  }
  html {
    scroll-behavior: smooth;
  }