:root{color-scheme:dark;--bg:#161916;--text:#f4ecdc;--muted:#b6b9a8;--accent:#e8ad6b;--line:#ffffff18;font-family:system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 50% 35%,#30392b55,transparent 65%),var(--bg);color:var(--text)}a{color:inherit;text-underline-offset:4px}button,input{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,a:focus-visible{outline:3px solid var(--accent);outline-offset:5px}button{ -webkit-tap-highlight-color:transparent}.shell{max-width:1120px;margin:auto;padding:0 40px}header{display:flex;justify-content:space-between;align-items:center;padding:28px 0;border-bottom:1px solid var(--line)}.brand{font-weight:700;text-decoration:none;font-size:15px}.brand span{font-weight:400;color:var(--muted);margin-left:8px}.edition{font-size:11px;letter-spacing:3px;color:var(--muted)}.intro{text-align:center;padding-top:42px}.eyebrow{font-size:12px;color:var(--accent);letter-spacing:5px;margin:0 0 12px}h1{font-size:clamp(29px,4.3vw,48px);font-weight:600;letter-spacing:1px;margin:0}h1 span{color:var(--accent)}.subtitle{font-size:13px;color:var(--muted);letter-spacing:2px;margin:13px 0}.instrument{height:390px;position:relative;isolation:isolate}.stage-label{text-align:center;padding-top:13px;font-size:12px;color:var(--muted)}kbd{display:inline-grid;place-items:center;border:1px solid #ffffff35;border-bottom-width:2px;border-radius:4px;min-width:23px;height:24px;margin-left:3px;font:11px inherit;color:var(--text)}.drum-body{position:absolute;width:300px;height:190px;left:50%;top:175px;transform:translateX(-50%);background:repeating-linear-gradient(77deg,transparent 0 24px,#cdb68770 25px 27px,transparent 28px 50px),repeating-linear-gradient(-77deg,transparent 0 24px,#cdb68770 25px 27px,transparent 28px 50px),linear-gradient(90deg,#312115,#775038 45%,#392619);clip-path:polygon(0 0,100% 0,74% 100%,26% 100%);border-bottom:10px solid #916545;z-index:-1}.drum-head{position:absolute;left:50%;top:50px;transform:translateX(-50%);width:420px;height:265px;border-radius:50%;background:#b78f5d;border:8px solid #775639;box-shadow:0 9px 0 #3d2e20,0 14px 0 #91724c,0 30px 50px #0007,inset 0 0 0 4px #d5bc88;overflow:hidden}.skin{position:absolute;inset:5px;border-radius:50%;background:radial-gradient(ellipse,#e8d4a8,#c7a876 78%,#9d7b4c);box-shadow:inset 0 0 25px #69482470}.skin:after{content:"";position:absolute;inset:0;border-radius:50%;opacity:.22;background:repeating-radial-gradient(ellipse at 38% 43%,transparent 0 3px,#79592c30 4px 5px)}.strike{border:1px solid #654b2b38;background:#ffffff0a;position:absolute;color:#49351d;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;touch-action:none;user-select:none;-webkit-user-select:none;transition:background .08s,box-shadow .08s}.strike .note{font-size:32px;font-weight:650;line-height:1.1}.strike>span:not(.note){font-size:9px;letter-spacing:3px}.strike small{font-size:11px;opacity:.8}.tone{left:3%;top:16%;width:29%;height:63%;border-radius:70% 30% 45% 60%}.slap{right:3%;top:16%;width:29%;height:63%;border-radius:30% 70% 60% 45%}.tonpalo{width:30%;height:25%;left:35%;top:4%;border-radius:50%;background:#f8ebcd28}.tonpalo .note{font-size:22px}.tonpalo>span:not(.note){font-size:8px;letter-spacing:1px}.bass{width:34%;height:60%;left:33%;top:33%;border-radius:50%;background:#f8ebcd28}.strike:hover{background:#fff4}.strike.active,.strike:active{background:#fff9;box-shadow:inset 0 0 28px #ad692b66}.touch-hint{position:absolute;bottom:0;left:0;right:0;text-align:center;font-size:11px;letter-spacing:1px;color:var(--muted)}.toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-size:12px;color:var(--muted)}.audio-state{display:flex;gap:9px;align-items:center}.status-dot{width:6px;height:6px;border-radius:50%;background:var(--accent);flex-shrink:0}#retry{background:transparent;border:1px solid var(--accent);color:var(--accent);border-radius:4px;padding:4px 8px}.volume{display:flex;align-items:center;gap:12px;white-space:nowrap}.volume input{width:100px;accent-color:var(--accent)}output{min-width:34px;font-variant-numeric:tabular-nums}.guide{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:27px 0}.guide article{display:flex;gap:14px;align-items:flex-start}.guide-key{display:grid;place-items:center;width:34px;height:38px;border:1px solid #e8ad6b44;border-radius:7px;color:var(--accent);flex-shrink:0;font-size:17px}.guide h2{font-size:14px;font-weight:600;margin:0 0 7px}.guide h2 span{font-weight:400;color:var(--muted);font-size:12px;margin-left:6px}.guide p{font-size:11px;line-height:1.7;margin:0;color:var(--muted)}footer{border-top:1px solid var(--line);padding:18px 0 24px;font-size:10px;line-height:1.8;color:var(--muted)}footer p{margin:3px 0}footer a{color:#d4c9ad}[hidden]{display:none!important}
@media(max-width:650px){.shell{padding:0 20px}header{padding:20px 0}.edition{letter-spacing:1px}.brand span{font-size:11px}.intro{padding-top:32px}.instrument{height:355px}.drum-head{width:330px;height:225px;top:54px}.drum-body{width:250px;height:160px;top:160px}.toolbar{flex-wrap:wrap;gap:16px}.volume{margin-left:auto}.guide{grid-template-columns:1fr;gap:19px;padding:24px 0}.guide article{align-items:center}.guide h2{margin-bottom:3px}.guide p{font-size:12px}.touch-hint{font-size:10px}.eyebrow{letter-spacing:3px}.strike .note{font-size:28px}}@media(max-width:360px){.drum-head{width:290px;height:210px}.drum-body{width:220px}.brand span{display:none}}@media(prefers-reduced-motion:reduce){.strike{transition:none}}