:root{--brand:#0B6E4F;--ink:#14212B;--muted:#4F5F6B;--bg:#F3F8F5;--card:#fff;--line:#D3E2DA;--accent:#12344D;--amber:#B45309;--red:#C0262D;--green:#1E7B3A}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
html.fs-on,html.fs-on body{overflow:hidden}
body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;line-height:1.7;font-size:16px}
.wrap{max-width:760px;margin:0 auto;padding:0 16px}
a{color:var(--brand)}
.skip{position:absolute;left:-999px;top:0}.skip:focus{left:8px;background:#fff;padding:8px;z-index:99}
.offscreen{position:fixed;left:-999px;top:0;opacity:0}
header.top{background:#fff;border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:0 8px;min-height:52px;flex-wrap:wrap}
.logo{font-weight:700;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:8px;min-height:44px}
.logo .dot{width:14px;height:14px;border-radius:50%;background:var(--brand)}
nav.main{display:flex;gap:2px;flex-wrap:wrap}
nav.main a{color:var(--muted);text-decoration:none;padding:10px 7px;min-height:44px;display:inline-flex;align-items:center;font-size:14px}
nav.main a[aria-current]{color:var(--brand);font-weight:700}
h1{font-size:26px;line-height:1.3;margin:14px 0 6px}
.answer{margin:0 0 10px;color:var(--muted);font-size:15px;line-height:1.6}
.crumb{font-size:14px;color:var(--muted);margin-top:8px}.crumb a{display:inline-flex;align-items:center;min-height:40px;min-width:40px}
.tool{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:12px;margin:0 0 20px;font-variant-numeric:tabular-nums}
button,input,select{font-family:inherit;color:var(--ink)}

.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:8px 0}
.row button,.tbtn,.row a.lnk{min-height:44px;padding:0 14px;border-radius:10px;border:1px solid var(--line);background:var(--bg);font-size:15px;display:inline-flex;align-items:center}
.row a.lnk{text-decoration:none;color:var(--brand)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.chip{min-width:56px;height:44px;padding:0 12px;border-radius:22px;border:1px solid var(--line);background:#fff;font-size:15px;display:inline-flex;align-items:center;justify-content:center;text-decoration:none;color:var(--ink)}
.fld{display:flex;flex-direction:column;font-size:13px;color:var(--muted);gap:2px;flex:1;min-width:0}
.fld input,.fld select{height:44px;border:1px solid var(--line);border-radius:10px;background:#fff;font-size:16px;padding:0 8px;min-width:0;width:100%}
.chk{display:inline-flex;align-items:center;gap:6px;min-height:44px;margin-right:12px;font-size:15px}
.chk input{width:20px;height:20px;accent-color:var(--brand)}
.muted{color:var(--muted)}
.note{font-size:14px;color:var(--muted);margin:6px 0 0;line-height:1.5}
.content h2,.faq h2,.related h2,.prose h2{font-size:20px;margin:26px 0 8px;line-height:1.4}
.content ol,.content ul{padding-left:22px;margin:8px 0}
.qa h3{font-size:17px;margin:16px 0 4px}.qa p{margin:0}
.cards{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.card{display:block;background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 14px;text-decoration:none;color:var(--ink)}
.cn{display:block;font-weight:700;color:var(--brand)}.cd{display:block;color:var(--muted);font-size:14px}
footer{margin-top:36px;border-top:1px solid var(--line);background:#fff;font-size:14px;color:var(--muted)}
footer .wrap{display:flex;flex-wrap:wrap;gap:4px 14px;align-items:center;padding-top:8px;padding-bottom:16px}
footer a{color:var(--muted);display:inline-flex;align-items:center;min-height:40px;min-width:40px}
[hidden]{display:none!important}
@media (min-width:700px){h1{font-size:32px}.tool{padding:18px}nav.main a{padding:10px 10px;font-size:15px}.cards{grid-template-columns:1fr 1fr}}

.read{text-align:center;padding:4px 0 0}
.note-big{font-size:clamp(48px,16vw,72px);font-weight:700;line-height:1.05;font-variant-numeric:tabular-nums}
.solf{font-size:16px;color:var(--muted)}
.hz{font-size:15px;color:var(--muted);font-variant-numeric:tabular-nums}
.meter{position:relative;height:44px;margin:8px 4px 0;border-bottom:2px solid var(--line)}
.scale{position:absolute;inset:0;display:flex;justify-content:space-between}
.tk{width:2px;height:12px;background:var(--line);align-self:flex-end}
.tk[data-c="0"]{height:24px;background:var(--ink)}
.zone{position:absolute;left:45%;width:10%;top:0;bottom:0;background:rgba(31,140,74,.12)}
.needle{position:absolute;top:0;bottom:-2px;width:4px;margin-left:-2px;left:50%;border-radius:2px;background:var(--muted);transition:left .08s linear}
.tool[data-tune=ok] .needle{background:var(--green)}.tool[data-tune=ok] .note-big,.tool[data-tune=ok] .cue{color:var(--green)}
.tool[data-tune=low] .needle,.tool[data-tune=high] .needle{background:var(--amber)}
.cline{text-align:center;margin:6px 0;font-variant-numeric:tabular-nums;min-height:1.6em}.cue{font-weight:700}
.ctl{display:flex;justify-content:center}
.start{min-width:180px;height:52px;border-radius:26px;border:0;background:var(--brand);color:#fff;font-size:18px;font-weight:700}
.tool[data-state=listening] .start{background:var(--ink)}
.micnote{font-size:13px;color:var(--muted);text-align:center;margin:6px 0}
.err{border:1px solid var(--red);background:#FDECEA;border-radius:10px;padding:8px 12px;margin:8px 0}.err p{margin:0}
.linkbox{width:100%;height:44px;font-size:15px;border:1px solid var(--line);border-radius:8px;padding:0 8px}
.strings{display:grid;grid-template-columns:repeat(auto-fit,minmax(48px,1fr));gap:6px;margin:8px 0}
.str{min-height:60px;border-radius:10px;border:1px solid var(--line);background:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:2px;font-variant-numeric:tabular-nums}
.str .sl,.str .sh{font-size:11px;color:var(--muted)}.str .sn{font-size:17px;font-weight:700}
.str[data-hit="1"]{border-color:var(--brand);box-shadow:0 0 0 2px var(--brand) inset}
.str[aria-pressed=true],.row button[aria-pressed=true]{background:var(--brand);color:#fff;border-color:var(--brand)}.str[aria-pressed=true] span{color:#fff}
@media (prefers-reduced-motion:reduce){.needle{transition:none}}