:root{--o:#f26b1d;--d:#1b2333;--l:#f5f7fa;--t:#2b3340}
*{box-sizing:border-box}body{margin:0;font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--t);background:var(--l)}
header{background:var(--d);color:#fff}header .w{display:flex;flex-wrap:wrap;align-items:center;gap:12px;justify-content:space-between}
.brand{font-weight:800;font-size:1.25rem;color:#fff;text-decoration:none}.brand span{color:var(--o)}
nav a{color:#dfe5ee;text-decoration:none;margin:0 10px 0 0;font-size:.95rem}nav a:hover,nav a.on{color:var(--o)}
.w{max-width:1000px;margin:0 auto;padding:14px 18px}main .w{padding-top:28px}
h1{color:var(--d);line-height:1.2}h2{color:var(--d);border-bottom:3px solid var(--o);display:inline-block;padding-bottom:2px;margin-top:2em}
.card{background:#fff;border-radius:12px;padding:18px 20px;box-shadow:0 1px 4px #0001;margin:14px 0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.grid a.card{text-decoration:none;color:inherit;display:block}.grid a.card:hover{outline:2px solid var(--o)}
.btn{display:inline-block;background:var(--o);color:#fff;padding:10px 18px;border-radius:8px;text-decoration:none;font-weight:600;margin:4px 6px 4px 0}
.warn{border-left:5px solid #d93025;background:#fff4f2}.tip{border-left:5px solid var(--o)}
table{border-collapse:collapse;width:100%;background:#fff}td,th{border:1px solid #dde2ea;padding:8px;text-align:left;vertical-align:top}th{background:#eef1f6}
.tw{overflow-x:auto}img.shot{max-width:100%;border:1px solid #dde2ea;border-radius:8px;display:block;margin:10px 0}figcaption{font-size:.85rem;color:#667}
code{background:#eef1f6;padding:1px 5px;border-radius:4px}footer{color:#778;font-size:.85rem;text-align:center;padding:30px 10px}