:root{--bg:#f6f7f9;--card:#fff;--text:#111418;--muted:#5b6470;--line:#e3e6ea;--accent:#1f6feb;--warn:#c62828;--ok:#1a7f37}
@media (prefers-color-scheme:dark){:root{--bg:#0f1216;--card:#171b21;--text:#e8eaed;--muted:#9aa3ad;--line:#2a3038;--accent:#58a6ff;--warn:#ff7b72;--ok:#3fb950}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
header{background:var(--card);border-bottom:1px solid var(--line)}
.wrap{max-width:760px;margin:0 auto;padding:0 16px}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:56px}
header a{color:var(--text);text-decoration:none;font-weight:700}
header nav a{font-weight:500;color:var(--muted);margin-left:16px}
header nav a.on{color:var(--accent)}
h1{font-size:28px;margin:28px 0 4px}
.lead{color:var(--muted);margin:0 0 20px}
.step{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px 18px 14px;margin:0 0 14px}
.step h2{font-size:18px;margin:0 0 8px;display:flex;gap:10px;align-items:center}
.step h2 .n{flex:none;width:28px;height:28px;border-radius:50%;background:var(--accent);color:#fff;font-size:15px;display:grid;place-items:center}
.step p,.step ul{margin:0 0 8px}
.step ul{padding-left:20px}
.step img{display:block;max-width:100%;height:auto;margin:10px auto 4px;border-radius:8px;background:#fff}
.warn{color:var(--warn)}
.muted{color:var(--muted);font-size:14px}
.mounts{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:10px}
.mount{border:1px solid var(--line);border-radius:10px;padding:10px;text-align:center}
.mount.rec{border-color:var(--accent)}
.mount img{margin:0 auto 6px;max-height:120px;width:auto}
.mount b{display:block}
.mount span{font-size:14px;color:var(--muted)}
.mount .tag,.tag{display:inline-block;font-size:12px;color:#fff;background:var(--accent);border-radius:10px;padding:0 8px;margin-top:4px}
.btn{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;border-radius:8px;padding:8px 14px;font-weight:600}
.cards{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.cards a{display:block;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;color:var(--text);text-decoration:none}
.cards a img{width:100%;height:150px;object-fit:contain;background:#fff;border-radius:8px;margin-bottom:10px}
.cards a b{font-size:18px}
footer{color:var(--muted);font-size:14px;padding:24px 0 40px}
footer a{color:var(--accent)}
@media (max-width:560px){.mounts,.cards{grid-template-columns:1fr}.mount img{max-height:100px}}
/* radar v2：两张安装大图 / 二维码 / 手机截图 */
.box{font-weight:500}
.pair{display:grid;grid-template-columns:1fr;gap:18px;margin:6px 0 10px}
.pair figure,.shots figure{margin:0}
.pair img{width:100%;max-width:600px;margin:6px 0 0}
figcaption{font-size:14px;color:var(--muted)}
figcaption b{color:var(--text)}
.qrs{display:flex;gap:18px;margin:4px 0 8px}
.qrs a{display:flex;flex-direction:column;align-items:center;gap:4px;color:var(--text);text-decoration:none;font-weight:600}
.qrs img{width:140px;height:140px;margin:0;border-radius:6px;image-rendering:pixelated}
.shots{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:8px 0 10px;align-items:start}
.shots img{margin:0 0 6px;border:1px solid var(--line);border-radius:12px}
.shots.one{grid-template-columns:minmax(0,320px)}
.todo{border:2px dashed var(--line);border-radius:12px;padding:40px 12px;text-align:center;color:var(--muted);font-size:14px}
img.ico{display:inline;height:1.4em;width:auto;margin:0 2px;vertical-align:-0.35em;border-radius:4px}
.step ol{padding-left:20px;margin:0 0 8px}
@media (max-width:560px){.pair,.shots{grid-template-columns:1fr}.shots figure{max-width:300px}}
.step img.diagram{width:100%;max-width:560px;margin:8px 0 12px;border:1px solid var(--line);border-radius:12px}
.getapp{display:flex;align-items:center;gap:14px;margin:0 0 10px;font-weight:600}
.getapp a{display:flex;align-items:center;gap:6px;color:var(--text);text-decoration:none;font-size:14px}
.getapp img{width:72px;height:72px;margin:0;border-radius:4px;image-rendering:pixelated}
.step img.entry{width:100%;max-width:520px;margin:4px 0 10px;border:1px solid var(--line);border-radius:12px}
.step.legal{font-size:13px;color:var(--muted)}
.step.legal b{color:var(--text)}
.step.legal p{margin:0 0 6px}
.step h3{margin:18px 0 4px;font-size:1.05rem}
.pair img[src$=".svg"]{max-width:360px}