/* roulang page: index */
:root {
            --primary: #1A56DB;
            --accent: #0284C7;
            --bg-light: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            color: var(--text-main);
            background-color: #FFFFFF;
            overflow-x: hidden;
        }
        .text-gradient {
            background: linear-gradient(135deg, #1A56DB 0%, #0284C7 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-bg {
            background-image: linear-gradient(to right, rgba(255, 255, 255, 0.96) 30%, rgba(248, 250, 252, 0.88) 100%), url('/assets/images/375c615a69b945e7.jpg');
            background-size: cover;
            background-position: center;
        }
        .code-block {
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
        }
        /* 原生折叠箭头交互动画 */
        details summary::-webkit-details-marker {
            display: none;
        }
        details[open] summary svg {
            transform: rotate(180deg);
        }
        /* 移动端菜单抽屉过渡 */
        #mobile-menu {
            transition: max-height 0.3s ease-in-out, opacity 0.2s ease-in-out;
        }

/* roulang page: category1 */
:root {
      --primary: #1A56DB;
      --accent: #0284C7;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      color: var(--text-main);
      background-color: #FFFFFF;
      overflow-x: hidden;
    }
    .text-gradient {
      background: linear-gradient(135deg, #1A56DB 0%, #0284C7 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .transition-card {
      transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
    }
    .transition-card:hover {
      transform: translateY(-4px);
    }
    #mobile-menu {
      transition: max-height 0.3s ease-in-out, opacity 0.2s ease-in-out;
    }