* { box-sizing: border-box; }
body { font-family: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
       max-width: 860px; margin: 0 auto; padding: 24px 18px 60px; color: #222; line-height: 1.75; background: #fafafa; }
header { border-bottom: 2px solid #1a73e8; padding-bottom: 12px; margin-bottom: 20px; }
header h1 { font-size: 24px; margin: 0; }
header h1 a { color: inherit; text-decoration: none; }
header .sub { color: #666; font-size: 13px; margin-top: 4px; }
.toolbar { display: flex; gap: 10px; margin: 16px 0; flex-wrap: wrap; }
.toolbar input[type="text"] { flex: 1; min-width: 200px; padding: 8px 12px; font-size: 15px;
    border: 1px solid #ccc; border-radius: 6px; }
.tagbar { margin: 10px 0 4px; }
.tag { display: inline-block; font-size: 13px; padding: 3px 10px; margin: 0 6px 6px 0;
       border: 1px solid #1a73e8; color: #1a73e8; border-radius: 14px; cursor: pointer; background: #fff; }
.tag.active { background: #1a73e8; color: #fff; }
.card { background: #fff; border: 1px solid #e3e3e3; border-radius: 8px; padding: 16px 18px; margin: 14px 0; }
.card h2 { font-size: 18px; margin: 0 0 6px; }
.card h2 a { color: #1a1a1a; text-decoration: none; }
.card h2 a:hover { color: #1a73e8; }
.card .summary { color: #444; font-size: 14px; margin: 6px 0; }
.meta { font-size: 12px; color: #888; }
.meta .tag { cursor: default; margin-bottom: 0; }
.article { background: #fff; border: 1px solid #e3e3e3; border-radius: 8px; padding: 22px 24px; margin-top: 14px; }
.article h1 { font-size: 22px; margin: 0 0 10px; line-height: 1.5; }
.article .body { font-size: 16px; }
.article .body p { margin: 12px 0; }
.src { margin-top: 18px; padding-top: 12px; border-top: 1px dashed #ccc; font-size: 14px; }
.back { font-size: 14px; margin-bottom: 8px; display: inline-block; }
.empty { color: #888; text-align: center; padding: 40px 0; }
.count { font-size: 13px; color: #888; margin: 6px 0; }