:root{--bg:#fafaf7;--fg:#1d1d1f;--muted:#5f6368;--card:#fff;--line:#e6e4dd;--accent:#e2553f;--accent-d:#c2412d;--radius:16px;--max:1040px}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans","PingFang TC","PingFang SC","Microsoft JhengHei","Microsoft YaHei",sans-serif}
a{color:var(--accent-d)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
header.site{border-bottom:1px solid var(--line);background:rgba(250,250,247,.9);backdrop-filter:saturate(1.4) blur(8px);position:sticky;top:0;z-index:10}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;height:60px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.2rem;color:var(--fg);text-decoration:none;letter-spacing:-.01em}
.brand svg{width:30px;height:30px}
nav.lang{display:flex;gap:4px;flex-wrap:wrap}
nav.lang a{font-size:.85rem;padding:4px 10px;border-radius:999px;text-decoration:none;color:var(--muted);border:1px solid transparent}
nav.lang a[aria-current]{color:var(--fg);border-color:var(--line);background:#fff}
.hero{padding:64px 0 36px}
.hero h1{font-size:clamp(2rem,5vw,3.2rem);line-height:1.1;margin:0 0 14px;letter-spacing:-.025em}
.hero p{font-size:1.15rem;color:var(--muted);max-width:640px;margin:0}
.tool{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:28px;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;margin:12px 0 28px;box-shadow:0 1px 2px rgba(0,0,0,.03),0 8px 24px rgba(0,0,0,.04)}
.tool img{width:100%;height:auto;border-radius:12px;border:1px solid var(--line);display:block;aspect-ratio:1200/630;object-fit:cover;background:#f2f0ea}
.tag{display:inline-block;font-size:.78rem;font-weight:600;padding:3px 10px;border-radius:999px;background:#e7f6ec;color:#1e7a3c;margin-bottom:10px}
.tool h2{margin:0 0 8px;font-size:1.6rem;letter-spacing:-.01em}
.tool p{margin:0 0 14px;color:var(--muted)}
.tool ul{margin:0 0 18px;padding-left:1.2em}
.btn{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;font-weight:700;padding:12px 20px;border-radius:12px}
.btn:hover{background:var(--accent-d)}
.note{font-size:.85rem;color:var(--muted);margin-top:10px}
.more{color:var(--muted);text-align:center;padding:4px 0 40px}
.prose{max-width:720px;padding:40px 0 56px}
.prose h1{font-size:2.1rem;line-height:1.2;letter-spacing:-.02em;margin:0 0 8px}
.prose h2{font-size:1.25rem;margin:32px 0 8px}
.prose .updated{color:var(--muted);font-size:.9rem}
.todo{background:#fff4d6;border:1px dashed #d9a400;padding:2px 8px;border-radius:6px;font-weight:600}
footer.site{border-top:1px solid var(--line);padding:28px 0 40px;color:var(--muted);font-size:.9rem}
footer.site .wrap{display:flex;flex-wrap:wrap;gap:10px 22px;justify-content:space-between}
footer.site a{color:var(--muted)}
footer.site nav{display:flex;gap:18px;flex-wrap:wrap}
@media (max-width:760px){.tool{grid-template-columns:1fr;padding:20px}.hero{padding:40px 0 24px}header.site .wrap{height:auto;padding-top:10px;padding-bottom:10px;flex-wrap:wrap}}
.explain{max-width:760px;margin:8px auto 24px;padding:0 4px}
.explain h2{font-size:1.35rem;margin:28px 0 10px;letter-spacing:-.01em}
.explain ol{padding-left:1.3em}.explain li{margin:6px 0}
.explain details{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin:8px 0}
.explain summary{cursor:pointer;font-weight:600}
.explain details p{margin:8px 0 0;color:var(--muted)}