/* roulang page: index */
:root {
      --bg-main: #050b14;
      --bg-surface: #0a1628;
      --color-primary: #06b6d4;
      --color-indigo: #6366f1;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --border-glass: rgba(255, 255, 255, 0.1);
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
      background-image: 
        radial-gradient(circle at 50% 0%, #1e1b4b 0%, #050b14 65%),
        radial-gradient(circle at 100% 40%, rgba(6, 182, 212, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 0% 75%, rgba(99, 102, 241, 0.07) 0%, transparent 40%);
      background-attachment: fixed;
    }
    .glass-dock {
      background: rgba(10, 22, 40, 0.75);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid rgba(255, 255, 255, 0.15);
      box-shadow: 0 10px 35px -5px rgba(0, 0, 0, 0.5), 0 0 15px rgba(6, 182, 212, 0.15);
    }
    .glass-card {
      background: rgba(15, 23, 42, 0.55);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid rgba(255, 255, 255, 0.08);
      box-shadow: inset 0 1px 0 0 rgba(255, 255, 255, 0.08);
    }
    .glass-card:hover {
      border-color: rgba(56, 189, 248, 0.35);
      box-shadow: 0 12px 30px -8px rgba(6, 182, 212, 0.2), inset 0 1px 0 0 rgba(255, 255, 255, 0.15);
    }
    .btn-glow {
      background: linear-gradient(135deg, #06b6d4 0%, #6366f1 100%);
      box-shadow: 0 0 20px rgba(6, 182, 212, 0.4);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .btn-glow:hover {
      box-shadow: 0 0 30px rgba(56, 189, 248, 0.75);
      transform: translateY(-2px);
    }
    .text-glow {
      text-shadow: 0 0 24px rgba(56, 189, 248, 0.5);
    }
    details summary::-webkit-details-marker {
      display: none;
    }

/* roulang page: category1 */
:root {
      --bg-main: #050b14;
      --bg-surface: #0a1628;
      --color-primary: #06b6d4;
      --color-indigo: #6366f1;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --border-glass: rgba(255, 255, 255, 0.1);
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
      background-image: 
        radial-gradient(circle at 50% 0%, #1e1b4b 0%, #050b14 65%),
        radial-gradient(circle at 100% 40%, rgba(6, 182, 212, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 0% 75%, rgba(99, 102, 241, 0.07) 0%, transparent 40%);
      background-attachment: fixed;
    }
    .glass-dock {
      background: rgba(10, 22, 40, 0.75);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid rgba(255, 255, 255, 0.12);
      box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5), 0 0 20px rgba(6, 182, 212, 0.15);
    }
    .glass-card {
      background: rgba(15, 23, 42, 0.55);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid rgba(255, 255, 255, 0.08);
      box-shadow: inset 0 1px 0 0 rgba(255, 255, 255, 0.08);
    }
    .glass-card:hover {
      border-color: rgba(56, 189, 248, 0.35);
      box-shadow: 0 12px 30px -8px rgba(6, 182, 212, 0.2), inset 0 1px 0 0 rgba(255, 255, 255, 0.15);
    }
    .btn-glow {
      background: linear-gradient(135deg, #06b6d4 0%, #6366f1 100%);
      box-shadow: 0 0 20px rgba(6, 182, 212, 0.4);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .btn-glow:hover {
      box-shadow: 0 0 30px rgba(56, 189, 248, 0.75);
      transform: translateY(-2px);
    }
    .shadow-glow-cyan {
      box-shadow: 0 0 16px rgba(6, 182, 212, 0.6);
    }
    .text-glow {
      text-shadow: 0 0 24px rgba(56, 189, 248, 0.5);
    }

/* roulang page: article */
:root {
      --bg-main: #050b14;
      --bg-surface: #0a1628;
      --color-primary: #06b6d4;
      --color-indigo: #6366f1;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --border-glass: rgba(255, 255, 255, 0.1);
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
      background-image: 
        radial-gradient(circle at 50% 0%, #1e1b4b 0%, #050b14 65%),
        radial-gradient(circle at 100% 40%, rgba(6, 182, 212, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 0% 75%, rgba(99, 102, 241, 0.07) 0%, transparent 40%);
      background-attachment: fixed;
    }
    .glass-card {
      background: rgba(15, 23, 42, 0.55);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid rgba(255, 255, 255, 0.08);
      box-shadow: inset 0 1px 0 0 rgba(255, 255, 255, 0.08);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .glass-card:hover {
      border-color: rgba(56, 189, 248, 0.35);
      box-shadow: 0 12px 30px -8px rgba(6, 182, 212, 0.2), inset 0 1px 0 0 rgba(255, 255, 255, 0.15);
    }
    .glass-dock {
      background: rgba(10, 22, 40, 0.78);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid rgba(255, 255, 255, 0.12);
      box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.5), 0 0 20px rgba(6, 182, 212, 0.15);
    }
    .btn-glow {
      background: linear-gradient(135deg, #06b6d4 0%, #6366f1 100%);
      box-shadow: 0 0 20px rgba(6, 182, 212, 0.4);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .btn-glow:hover {
      box-shadow: 0 0 30px rgba(56, 189, 248, 0.75);
      transform: translateY(-2px);
    }
    .text-glow {
      text-shadow: 0 0 24px rgba(56, 189, 248, 0.5);
    }
    .article-content {
      line-height: 1.95;
      font-size: 1.075rem;
      color: #cbd5e1;
    }
    .article-content h2 {
      font-size: 1.75rem;
      font-weight: 800;
      color: #ffffff;
      margin-top: 2.75rem;
      margin-bottom: 1.25rem;
      padding-bottom: 0.5rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      display: flex;
      align-items: center;
      gap: 0.6rem;
    }
    .article-content h2::before {
      content: "";
      display: inline-block;
      width: 4px;
      height: 1.35em;
      background: linear-gradient(to bottom, #06b6d4, #6366f1);
      border-radius: 9999px;
    }
    .article-content h3 {
      font-size: 1.35rem;
      font-weight: 700;
      color: #e2e8f0;
      margin-top: 2rem;
      margin-bottom: 1rem;
    }
    .article-content p {
      margin-bottom: 1.4rem;
      text-align: justify;
    }
    .article-content blockquote {
      position: relative;
      margin: 2rem 0;
      padding: 1.25rem 1.75rem;
      background: rgba(30, 41, 59, 0.4);
      border-left: 4px solid #06b6d4;
      border-radius: 0 0.75rem 0.75rem 0;
      font-style: italic;
      color: #94a3b8;
    }
    .article-content ul, .article-content ol {
      margin: 1.25rem 0;
      padding-left: 1.5rem;
    }
    .article-content li {
      margin-bottom: 0.6rem;
      list-style-type: disc;
    }
    .article-content img {
      border-radius: 1rem;
      border: 1px solid rgba(255, 255, 255, 0.12);
      margin: 2rem auto;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    }