:root{
  --bg:#0a0c12; --bg2:#0e1220; --card:#131828; --card2:#171e33;
  --line:#232c44; --txt:#eef1f8; --mut:#9aa5bf; --dim:#8b95ad;
  --acc:#1ed760; --acc-dk:#0e9b45; --vio:#9d7bff; --amber:#ffb454;
  --r:16px; --font:system-ui,-apple-system,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--txt);font-family:var(--font);line-height:1.6}
a{color:var(--acc);text-decoration:none}
::selection{background:rgba(30,215,96,.3)}

/* nav */
.nav{position:sticky;top:0;z-index:20;background:rgba(10,12,18,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;gap:18px;padding:12px 20px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;white-space:nowrap}
.logo .disc{width:30px;height:30px;border-radius:50%;background:conic-gradient(from 0deg,#1ed760,#9d7bff,#ffb454,#1ed760);display:inline-flex;align-items:center;justify-content:center;flex:none}
.logo .disc::after{content:"";width:10px;height:10px;border-radius:50%;background:var(--bg)}
.nav nav{display:flex;gap:4px;margin-left:auto}
.nav nav a{color:var(--mut);font-size:14px;padding:8px 14px;border-radius:999px}
.nav nav a:hover,.nav nav a.on{color:var(--txt);background:#1a2138}
.nav .count{font-size:12px;color:var(--dim);border:1px solid var(--line);border-radius:999px;padding:4px 12px;white-space:nowrap}
.burger{display:none;background:none;border:1px solid var(--line);color:var(--txt);border-radius:10px;padding:7px 11px;font-size:16px;line-height:1;cursor:pointer;margin-left:auto}
@media(max-width:640px){
  .nav .wrap{position:relative}
  .burger{display:inline-flex}
  .nav nav{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;gap:2px;
    background:rgba(13,17,29,.98);border-bottom:1px solid var(--line);padding:8px 16px 12px;backdrop-filter:blur(10px)}
  .nav nav.open{display:flex}
  .nav nav a{border-radius:10px;padding:11px 12px;font-size:15px}
}

/* hero */
.hero{position:relative;overflow:hidden;background:radial-gradient(900px 320px at 15% -40px,rgba(30,215,96,.14),transparent 60%),radial-gradient(800px 300px at 85% -30px,rgba(157,123,255,.14),transparent 60%),var(--bg2);border-bottom:1px solid var(--line)}
.hero .wrap{padding:56px 20px 40px;max-width:1080px}
.kicker{display:inline-flex;align-items:center;gap:8px;font-size:12px;color:var(--acc);border:1px solid rgba(30,215,96,.4);border-radius:999px;padding:4px 14px;margin-bottom:16px}
.kicker .dot{width:7px;height:7px;border-radius:50%;background:var(--acc);box-shadow:0 0 8px var(--acc)}
.hero h1{font-size:clamp(30px,5vw,52px);margin:0 0 10px;font-weight:800;letter-spacing:-.5px}
.hero h1 em{font-style:normal;color:var(--acc)}
.hero p.sub{color:var(--mut);font-size:16px;max-width:640px;margin:0 0 24px}
.notice{display:inline-block;font-size:12.5px;color:#c99a5c;margin:0 0 18px;max-width:640px;opacity:.95}
.searchbig{display:flex;gap:10px;max-width:640px}
.searchbig input{flex:1;background:#0a0e1a;border:1px solid var(--line);border-radius:12px;padding:14px 16px;font-size:15px;color:var(--txt);outline:none}
.searchbig input:focus{border-color:var(--acc)}
.searchbig button{background:var(--acc);color:#06230f;border:0;border-radius:12px;padding:0 26px;font-size:15px;font-weight:800;cursor:pointer}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}
.chip{font-size:13px;color:var(--mut);border:1px solid var(--line);border-radius:999px;padding:6px 14px;cursor:pointer;background:transparent}
.chip:hover{color:var(--txt);border-color:var(--acc)}
.chip.on{background:rgba(30,215,96,.15);border-color:var(--acc);color:var(--acc)}
.stats{display:flex;gap:26px;margin-top:26px;flex-wrap:wrap}
.stats div b{display:block;font-size:24px;color:var(--txt)}
.stats div span{font-size:12px;color:var(--dim)}

/* waveform divider */
.wave{display:flex;align-items:flex-end;gap:3px;height:34px;margin-top:28px;opacity:.7}
.wave i{width:4px;border-radius:2px;background:linear-gradient(180deg,var(--acc),var(--vio));animation:eq 1.6s ease-in-out infinite}
.wave i:nth-child(odd){animation-delay:-.4s}.wave i:nth-child(3n){animation-delay:-.9s}.wave i:nth-child(4n){animation-delay:-1.2s}
@keyframes eq{0%,100%{height:8px}50%{height:30px}}
@media(prefers-reduced-motion:reduce){.wave i{animation:none;height:12px}}

/* sections */
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
section.block{padding:44px 0 8px;scroll-margin-top:56px}
.meta-table tr.mgroup th{background:#0f1524;color:var(--acc);font-size:13px;padding-top:14px}
.sec-head{display:flex;align-items:baseline;gap:12px;margin-bottom:6px}
.sec-head h2{font-size:22px;margin:0}
.sec-head small{color:var(--dim);font-size:13px}
.sec-desc{color:var(--mut);font-size:14px;margin:0 0 18px;max-width:720px}

/* tag library */
.taggroup{margin-bottom:18px}
.taggroup h3{font-size:14px;color:var(--dim);margin:0 0 10px;font-weight:600}
.tagcloud{display:flex;gap:8px;flex-wrap:wrap}
.tag{font-size:12.5px;font-family:var(--mono);border:1px solid var(--line);background:#0f1524;border-radius:8px;padding:5px 11px;color:#c8d2e8;cursor:pointer}
.tag:hover{border-color:var(--vio);color:#fff}
.tag small{color:var(--dim);font-family:var(--font)}
.meta-table{width:100%;border-collapse:collapse;font-size:13px;margin-top:6px}
.meta-table th,.meta-table td{text-align:left;padding:10px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.meta-table th{color:var(--dim);font-weight:600;white-space:nowrap}
.meta-table td code{font-family:var(--mono);color:var(--amber);font-size:12.5px;white-space:nowrap}
.meta-table td span{color:var(--mut)}
.meta-table tr.mgroup th{background:#0f1524;color:var(--acc);font-size:13px;padding-top:14px}
.meta-table tr.mclick{cursor:pointer;transition:background .12s}
.meta-table tr.mclick:nth-child(even){background:rgba(255,255,255,.022)}
.meta-table tr.mclick:hover{background:rgba(30,215,96,.08)}
.meta-table tr.mclick:hover code{color:#7deda6}
.meta-table .cphint{float:right;color:var(--dim);font-size:11px;opacity:0;transition:opacity .12s;font-family:var(--font)}
.meta-table tr.mclick:hover .cphint{opacity:1}

/* toolbar */
.toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:12px 14px;margin-bottom:16px}
.toolbar input[type=search]{flex:1;min-width:180px;background:#0a0e1a;border:1px solid var(--line);color:var(--txt);border-radius:10px;padding:9px 12px;font-size:14px;outline:none}
.toolbar input:focus{border-color:var(--acc)}
.toolbar select{background:#0a0e1a;border:1px solid var(--line);color:var(--txt);border-radius:10px;padding:9px 10px;font-size:13px}
.toolbar .n{margin-left:auto;font-size:12px;color:var(--dim);white-space:nowrap}

/* cards */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(310px,1fr));gap:16px;padding-bottom:10px}
.card{background:linear-gradient(180deg,var(--card2),var(--card));border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column;transition:transform .15s,border-color .15s}
.card:hover{transform:translateY(-3px);border-color:#31405f}
.cover{height:118px;position:relative;display:flex;align-items:flex-end;padding:12px 14px;overflow:hidden}
.cover::before{content:"";position:absolute;inset:0;opacity:.9}
.cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.cover.g0::before{background:linear-gradient(135deg,#123524,#1ed76055),radial-gradient(300px 120px at 80% 20%,#1ed76066,transparent)}
.cover.g1::before{background:linear-gradient(135deg,#2b1a4d,#9d7bff66),radial-gradient(300px 120px at 20% 20%,#ffb45455,transparent)}
.cover.g2::before{background:linear-gradient(135deg,#4d1a2b,#ff6b9d55),radial-gradient(300px 120px at 80% 80%,#ffb45466,transparent)}
.cover.g3::before{background:linear-gradient(135deg,#0f2f4d,#4dc3ff66),radial-gradient(300px 120px at 20% 80%,#9d7bff55,transparent)}
.cover.hasimg::before{background:linear-gradient(180deg,rgba(6,8,14,.08),rgba(6,8,14,.78))}
.cover .bpm{position:relative;font-family:var(--mono);font-size:12px;background:rgba(0,0,0,.55);border-radius:8px;padding:3px 10px;color:#fff}
.cover .genre{position:relative;margin-left:auto;font-size:12px;background:rgba(0,0,0,.55);border-radius:8px;padding:3px 10px;color:#fff}
.card .body{padding:14px;display:flex;flex-direction:column;gap:10px;flex:1}
.card h3{margin:0;font-size:17px}
.card .plat{font-size:12px;color:var(--dim)}
.card .desc{font-size:13px;color:var(--mut);margin:0}
.styleprev{font-size:12px;font-family:var(--mono);color:#c8d2e8;background:#0a0e1a;border:1px solid var(--line);border-radius:10px;padding:9px 11px;line-height:1.65;max-height:92px;overflow:hidden;margin:0}
.tags{display:flex;gap:6px;flex-wrap:wrap}
.tags .tag{cursor:default;font-size:11px}
.btnrow{display:flex;gap:8px;flex-wrap:wrap;margin-top:auto}
button,.btn{cursor:pointer;border:1px solid var(--line);background:#0a0e1a;color:var(--txt);border-radius:10px;padding:8px 13px;font-size:13px}
button:hover,.btn:hover{border-color:var(--acc)}
button.primary{background:var(--acc);border-color:var(--acc);color:#06230f;font-weight:800}
button.ghostv{border-color:#3a3355}
audio{width:100%;height:32px}
.empty{color:var(--dim);border:1px dashed var(--line);border-radius:14px;padding:30px;text-align:center}

/* guide */
.guide{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:16px}
.gcard{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px}
.gcard h3{margin:0 0 8px;font-size:15px;color:var(--acc)}
.gcard ol,.gcard ul{margin:0;padding-left:20px;font-size:13.5px;color:var(--mut)}
.gcard li{margin:5px 0}
.gcard code{font-family:var(--mono);font-size:12px;color:var(--amber);background:#0a0e1a;padding:1px 6px;border-radius:6px}
.formula{background:#0a0e1a;border:1px solid var(--line);border-radius:12px;padding:14px;font-family:var(--mono);font-size:13px;line-height:2;color:#c8d2e8}
.formula b{color:var(--acc)}

/* modal */
.modal{position:fixed;inset:0;background:rgba(4,6,10,.72);display:none;align-items:flex-start;justify-content:center;padding:26px 12px;z-index:50}
.modal.open{display:flex}
.sheet{background:#101627;border:1px solid #2c3a5c;border-radius:18px;max-width:780px;width:100%;max-height:92vh;overflow:auto;padding:20px 20px 24px}
.topbar{display:flex;justify-content:space-between;align-items:flex-start;gap:10px}
.topbar h2{margin:0;font-size:20px}
.topbar .mmeta{font-size:12px;color:var(--dim);margin-top:4px}
.x{font-size:16px;line-height:1;padding:8px 12px;flex:none}
.mdesc{color:var(--mut);font-size:13.5px}
.tabs{display:flex;gap:6px;margin:14px 0 4px;flex-wrap:wrap}
.tabs button{border-radius:999px}
.tabs button.on{background:rgba(30,215,96,.15);border-color:var(--acc);color:var(--acc)}
.tabpane{display:none}
.tabpane.on{display:block}
pre{white-space:pre-wrap;background:#080b13;border:1px solid var(--line);border-radius:12px;padding:13px;font-size:13px;line-height:1.75;margin:8px 0;font-family:var(--mono);color:#dbe3f5}
.secrow{display:flex;align-items:center;gap:10px;margin-top:14px}
.secrow b{font-size:14px}
.secrow button{margin-left:auto;font-size:12px}
.copyok{color:var(--acc);font-size:12px;min-height:18px}
.lockbar{display:flex;gap:8px;align-items:center;background:rgba(255,180,84,.08);border:1px dashed rgba(255,180,84,.55);border-radius:12px;padding:10px 12px;margin-top:12px;flex-wrap:wrap;font-size:13px}
.lockbar input{background:#080b13;border:1px solid var(--line);color:var(--txt);border-radius:8px;padding:7px 10px;font-size:13px;text-transform:uppercase}
.lockmsg{font-size:12px;color:var(--amber)}

footer{border-top:1px solid var(--line);color:var(--dim);font-size:12px;margin-top:44px}
footer .wrap{padding:22px 20px}