:root{--bg:#f6f7f9;--card:#fff;--ink:#1f2937;--muted:#6b7280;--accent:#2563eb;--line:#e5e7eb}
*{box-sizing:border-box}
body{margin:0;font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.7}
.container{max-width:960px;margin:0 auto;padding:0 20px}
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{font-size:19px;font-weight:700;color:var(--ink);text-decoration:none}
nav a{margin-left:18px;color:var(--muted);text-decoration:none}
nav a:hover,nav a.active{color:var(--accent)}
.hero{text-align:center;padding:56px 0 30px}
.hero h1{font-size:32px;margin:0 0 10px}
.hero p{margin:6px 0;color:var(--muted)}
.stat strong{color:var(--accent);font-size:22px}
#articles h2,.related h2{font-size:22px;margin:34px 0 14px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;margin-bottom:40px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;transition:transform .15s,box-shadow .15s}
.card:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(0,0,0,.07)}
.card-link{display:block;padding:18px;text-decoration:none;color:inherit}
.card h3{margin:8px 0;font-size:17px;color:var(--ink)}
.card p{margin:0 0 8px;color:var(--muted);font-size:14px}
.card time{color:var(--muted);font-size:13px}
.badge{display:inline-block;background:#eef2ff;color:var(--accent);font-size:12px;padding:2px 8px;border-radius:999px}
.empty{color:var(--muted)}
.breadcrumb{font-size:13px;color:var(--muted);margin:24px 0 8px}
.breadcrumb a{color:var(--accent);text-decoration:none}
.post{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:28px 32px;margin-bottom:24px}
.post h1{font-size:26px;margin:0 0 10px}
.post-meta{color:var(--muted);font-size:13px;margin-bottom:16px;display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.tag{background:#f3f4f6;padding:2px 8px;border-radius:999px}
.post-body h2{font-size:21px;margin:26px 0 10px;padding-bottom:6px;border-bottom:1px solid var(--line)}
.post-body h3{font-size:17px;margin:20px 0 8px}
.post-body table{border-collapse:collapse;width:100%;margin:14px 0;font-size:14px}
.post-body th,.post-body td{border:1px solid var(--line);padding:8px 10px;text-align:left}
.post-body th{background:#f9fafb}
.post-body blockquote{margin:14px 0;padding:10px 16px;border-left:4px solid var(--accent);background:#eff6ff;color:#374151}
.post-body code{background:#f3f4f6;padding:2px 5px;border-radius:4px;font-size:13px}
.post-body a{color:var(--accent)}
.related{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px 28px;margin-bottom:40px}
.site-footer{border-top:1px solid var(--line);background:#fff;color:var(--muted);font-size:13px;padding:26px 0;margin-top:40px}
.site-footer p{margin:4px 0}
.site-footer a{color:var(--accent);text-decoration:none}
@media(max-width:640px){.post{padding:20px}.hero h1{font-size:26px}}