* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    line-height: 1.8;
    color: #222;
    background: #fafafa;
    padding: 40px 20px;
}
.container { max-width: 820px; margin: 0 auto; background: #fff; padding: 48px 56px; border-radius: 4px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
.site-title { font-size: 28px; font-weight: 600; color: #111; margin-bottom: 6px; }
.site-title a { color: #111; text-decoration: none; }
.site-title a:hover { text-decoration: underline; }
.site-desc { font-size: 16px; color: #777; margin-bottom: 32px; border-bottom: 1px solid #eee; padding-bottom: 24px; }
.nav { display: flex; gap: 24px; margin-bottom: 32px; padding-bottom: 20px; border-bottom: 1px solid #eee; flex-wrap: wrap; }
.nav a { color: #555; text-decoration: none; font-size: 15px; }
.nav a:hover { color: #111; text-decoration: underline; }
.nav a.active { color: #111; font-weight: 600; }
.footer { margin-top: 40px; padding-top: 24px; border-top: 1px solid #eee; font-size: 14px; color: #aaa; text-align: center; }
@media (max-width: 600px) { .container { padding: 28px 20px; } .site-title { font-size: 22px; } .nav { gap: 12px 16px; } }
/* marked.js 新增样式 */
.doing-content h1 { font-size: 28px; font-weight: 700; margin: 24px 0 16px; border-bottom: 2px solid #eee; padding-bottom: 8px; }
.doing-content h2 { font-size: 24px; font-weight: 600; margin: 20px 0 12px; }
.doing-content h3 { font-size: 20px; font-weight: 600; margin: 16px 0 10px; }
.doing-content ul { padding-left: 24px; margin: 8px 0; }
.doing-content ul li { list-style: disc; margin: 4px 0; }
.doing-content ol { padding-left: 24px; margin: 8px 0; }
.doing-content ol li { list-style: decimal; margin: 4px 0; }
.doing-content ul ul { margin: 0; }
.doing-content ul ul li { list-style: circle; }
.doing-content table { border-collapse: collapse; width: 100%; margin: 16px 0; }
.doing-content th, .doing-content td { border: 1px solid #ddd; padding: 8px 12px; text-align: left; }
.doing-content th { background: #f5f5f5; font-weight: 600; }
.doing-content input[type="checkbox"] { margin-right: 8px; }
.doing-content blockquote { border-left: 4px solid #1a73e8; padding-left: 16px; margin: 16px 0; color: #555; background: #f8f9fa; padding: 12px 16px; border-radius: 0 4px 4px 0; }
.doing-content code { background: #f0f0f0; padding: 2px 6px; border-radius: 3px; font-size: 0.9em; }
.doing-content pre { background: #f5f5f5; padding: 16px; border-radius: 4px; overflow-x: auto; }
.doing-content pre code { background: none; padding: 0; font-size: 14px; }