*{box-sizing:border-box}body{margin:0;font:17px/1.75 -apple-system,"PingFang SC","Microsoft YaHei",sans-serif;color:#222;background:#faf9f5}
header{position:sticky;top:0;background:#fff;border-bottom:1px solid #eee;padding:.5rem 1rem;z-index:9}
.brand{font-weight:700;color:#c96442;text-decoration:none}nav{display:flex;gap:.9rem;overflow-x:auto;white-space:nowrap;font-size:.95rem}
nav a{color:#444;text-decoration:none;padding:.3rem 0}nav a[aria-current]{color:#c96442;border-bottom:2px solid #c96442}
main{max-width:720px;margin:0 auto;padding:1rem}h1{font-size:1.6rem;line-height:1.35;margin:.5rem 0}h2{font-size:1.25rem;margin-top:2rem}
.meta{color:#777;font-size:.85rem}.answer{background:#fff;border-left:4px solid #c96442;padding:.8rem 1rem;border-radius:6px}
a{color:#b4532f}.cta-box{text-align:center;margin:2rem 0}.cta{display:block;background:#c96442;color:#fff;font-weight:700;padding:1rem;border-radius:12px;text-decoration:none;font-size:1.1rem}
.cta:active{opacity:.85}details{background:#fff;border:1px solid #eee;border-radius:8px;padding:.7rem 1rem;margin:.6rem 0}summary{font-weight:600;cursor:pointer}
.tip{background:#fff;border:1px solid #eee;border-radius:10px;padding:.8rem 1rem;margin:.8rem 0}.tip blockquote{margin:.3rem 0}.tip .by{font-size:.85rem;color:#666}
.src{font-size:.85rem;color:#555}footer{max-width:720px;margin:0 auto;padding:1rem;color:#888;font-size:.8rem}footer nav{flex-wrap:wrap}
@media(min-width:760px){header{display:flex;justify-content:space-between;align-items:center}}
.filters input{position:absolute;opacity:0}.filters label{display:inline-block;margin:.2rem .3rem .2rem 0;padding:.3rem .75rem;border:1px solid #ddd;border-radius:999px;background:#fff;font-size:.9rem;cursor:pointer}
.filters input:checked+label{background:#c96442;color:#fff;border-color:#c96442}.filters input:focus-visible+label{outline:2px solid #333}
.cases{list-style:none;padding:0;margin:.6rem 0}.case{background:#fff;border:1px solid #eee;border-radius:10px;padding:.7rem 1rem;margin:.6rem 0}
.case blockquote{margin:.3rem 0}.case .by,.case .chk{font-size:.85rem;color:#555;margin:.2rem 0}.tag{font-size:.75rem;background:#f3e3dc;color:#9a4526;padding:.1rem .5rem;border-radius:4px}
#f-ban:checked~.cases .case:not(.c-ban),#f-reg:checked~.cases .case:not(.c-reg),#f-use:checked~.cases .case:not(.c-use),#f-appeal:checked~.cases .case:not(.c-appeal){display:none}
.steps.compact li{margin:.3rem 0;font-size:.95rem}
.embed{margin:.4rem 0 0;padding:.3rem .6rem;border:1px dashed #ddd;background:#fcfbf8}.embed summary{font-size:.85rem;font-weight:500;color:#b4532f}.embed .twitter-tweet{margin:.5rem 0}
.featured{background:#fff6f1;border:1px solid #f0d5c8;border-radius:12px;padding:.2rem 1rem .6rem;margin:1rem 0}.featured h2{margin-top:.8rem}
.toc{display:flex;flex-wrap:wrap;gap:.4rem .8rem;font-size:.9rem;margin:.6rem 0}