*{box-sizing:border-box}
body{margin:0;font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans CJK SC",Roboto,sans-serif;
color:#1f2937;background:#f8fafc}
a{color:#2563eb;text-decoration:none}a:hover{text-decoration:underline}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
header.top{background:linear-gradient(135deg,#0f172a,#1e3a8a);color:#fff;padding:38px 0}
header.top h1{margin:0 0 6px;font-size:26px}
header.top p{margin:0;opacity:.8;font-size:14px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;margin:26px 0}
.card{background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:18px;transition:.15s;
box-shadow:0 1px 2px rgba(0,0,0,.04)}
.card:hover{box-shadow:0 6px 18px rgba(0,0,0,.09);transform:translateY(-2px)}
.card h3{margin:0 0 8px;font-size:17px}
.card p{margin:0 0 12px;color:#6b7280;font-size:14px}
.card .meta{color:#9ca3af;font-size:12px}
.article{background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:28px;margin:24px 0}
.article h1{font-size:22px;border-bottom:2px solid #eef2f7;padding-bottom:10px}
.article table{border-collapse:collapse;width:100%;font-size:13.5px;display:block;overflow-x:auto}
.article th,.article td{border:1px solid #e5e7eb;padding:7px 10px;text-align:left;white-space:nowrap}
.article th{background:#f1f5f9}
.article tr:nth-child(even){background:#fafbfc}
.article code{background:#f1f5f9;padding:1px 5px;border-radius:4px;font-size:13px}
.article pre{background:#0f172a;color:#e2e8f0;padding:14px;border-radius:8px;overflow-x:auto}
.article pre code{background:none;color:inherit}
.back{display:inline-block;margin:14px 0}
footer{color:#9ca3af;font-size:13px;text-align:center;padding:30px 0}