:root{
  --bg:#f4f4f1;
  --paper:#fbfbf9;
  --ink:#0b0c0e;
  --soft:#5f6368;
  --muted:#8b8e92;
  --line:rgba(11,12,14,.12);
  --line-soft:rgba(11,12,14,.07);
  --ease:cubic-bezier(.16,1,.3,1);
  --spring:cubic-bezier(.22,1.18,.36,1);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;overflow:hidden;background:var(--bg);color:var(--ink);
  font-family:"SF Pro Display","Helvetica Neue","Microsoft YaHei","PingFang SC",sans-serif;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  -webkit-user-select:none;user-select:none;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(58% 62% at 54% 44%,rgba(255,255,255,.96),rgba(255,255,255,0) 70%),
    radial-gradient(70% 80% at 50% 100%,rgba(0,0,0,.045),rgba(0,0,0,0) 62%),
    var(--bg);
}
button{font:inherit;color:inherit}
a{color:inherit;text-decoration:none}

#stage{position:fixed;inset:0;z-index:2;width:100%;height:100%;display:block;outline:none;cursor:grab;touch-action:none;transition:opacity .9s var(--ease),filter .9s var(--ease),transform 1.2s var(--ease)}
#stage:active{cursor:grabbing}
#stage:focus-visible{box-shadow:inset 0 0 0 1px var(--line-strong,rgba(11,12,14,.25))}
body.is-choice #stage{opacity:.42;filter:blur(4px) saturate(.9);transform:scale(1.06)}
body.is-sheet #stage{opacity:.08;filter:blur(7px);transform:scale(1.02)}

.stage-halo{position:fixed;left:50%;top:47%;width:min(62vw,760px);aspect-ratio:1;transform:translate(-50%,-50%);z-index:1;pointer-events:none;border-radius:50%;
  background:radial-gradient(circle,rgba(11,12,14,.075) 0%,rgba(11,12,14,.03) 38%,rgba(11,12,14,0) 70%);filter:blur(8px)}
.stage-grid{position:fixed;left:0;right:0;bottom:0;width:100%;height:46vh;object-fit:cover;object-position:bottom;z-index:0;opacity:.13;pointer-events:none;mix-blend-mode:multiply;
  -webkit-mask-image:linear-gradient(to top,#000 0%,rgba(0,0,0,.4) 52%,transparent 100%);mask-image:linear-gradient(to top,#000 0%,rgba(0,0,0,.4) 52%,transparent 100%)}
.grain{position:fixed;inset:0;z-index:3;pointer-events:none;opacity:.035;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/></filter><rect width='180' height='180' filter='url(%23n)' opacity='.55'/></svg>")}

/* header */
.topbar{position:fixed;top:0;left:0;right:0;z-index:20;display:flex;align-items:flex-start;justify-content:space-between;padding:26px 42px;pointer-events:none;transition:opacity .6s var(--ease),transform .8s var(--ease)}
.brand{display:flex;flex-direction:column;gap:7px;pointer-events:auto}
.brand img{width:142px;display:block}
.brand span{font:8.5px/1.4 Consolas,"SFMono-Regular",monospace;letter-spacing:.22em;color:var(--muted);padding-left:2px}
.top-center{font:9px/1 Consolas,"SFMono-Regular",monospace;letter-spacing:.3em;color:#9a9da0;padding-top:18px}
.top-actions{display:flex;align-items:flex-start;gap:16px;pointer-events:auto}
.account-entry{font:9px/1 Consolas,"SFMono-Regular",monospace;letter-spacing:.12em;color:var(--ink);padding:17px 0 6px;border-bottom:1px solid rgba(11,12,14,.28);white-space:nowrap}
.account-entry:hover{border-bottom-color:var(--ink)}
.version{font:9px/1 Consolas,"SFMono-Regular",monospace;letter-spacing:.22em;color:var(--muted);padding-top:18px}
body.is-choice .topbar{opacity:.25}
body.is-sheet .topbar{opacity:0}

/* hero */
.hero{position:fixed;inset:0;z-index:8;pointer-events:none;display:flex;align-items:center;justify-content:space-between;padding:0 42px;transition:opacity .6s var(--ease),transform .9s var(--ease)}
.intro{width:342px;transform:translateY(-2.2vh);pointer-events:auto}
.eyebrow{display:flex;align-items:center;gap:10px;margin:0 0 30px;font:9px/1 Consolas,"SFMono-Regular",monospace;letter-spacing:.24em;color:var(--muted)}
.eyebrow span{width:24px;height:1px;background:var(--ink);display:inline-block}
h1{margin:0;font-size:clamp(46px,4.5vw,76px);line-height:.98;letter-spacing:-.065em;font-weight:600}
h1 em{font-style:normal;color:#9a9c9e}
.lede{margin:28px 0 0;font-size:13.5px;line-height:1.95;letter-spacing:.01em;color:var(--soft);max-width:272px}
.core-hint{display:flex;align-items:center;gap:9px;margin:46px 0 0;font:10px/1.5 "Microsoft YaHei",sans-serif;letter-spacing:.16em;color:var(--muted)}
.core-hint .dot{width:6px;height:6px;border-radius:50%;background:var(--ink);animation:breath 2.6s var(--ease) infinite}
@keyframes breath{0%,100%{opacity:.22;transform:scale(.8)}50%{opacity:1;transform:scale(1)}}
body.is-choice .hero,body.is-sheet .hero{opacity:0;transform:translateY(-1.5vh)}

/* listen */
.listen{width:300px;transform:translateY(1vh);pointer-events:auto;border-left:1px solid var(--line);padding:2px 0 2px 26px;transition:opacity .6s var(--ease),transform .9s var(--ease)}
.listen-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:14px;border-bottom:1px solid var(--line);font:9px/1 Consolas,"SFMono-Regular",monospace;letter-spacing:.26em;color:var(--muted)}
.listen-head b{font-weight:400;color:var(--ink)}
.tracks{display:flex;flex-direction:column}
.track{appearance:none;border:0;background:transparent;text-align:left;padding:12px 12px 11px;margin:2px -12px;border-radius:10px;display:grid;grid-template-columns:24px 1fr auto;align-items:center;gap:10px;cursor:pointer;transition:background .35s var(--ease),color .35s var(--ease),transform .35s var(--ease)}
.track .no{font:9px/1 Consolas,"SFMono-Regular",monospace;color:#a3a6a8;letter-spacing:.06em}
.track .tt{min-width:0}
.track .tt b{display:block;font-size:12.5px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;letter-spacing:.01em}
.track .tt small{display:block;margin-top:4px;font-size:9px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;letter-spacing:.05em}
.track .time{font:9px/1 Consolas,"SFMono-Regular",monospace;color:#9a9da0}
.track:hover{background:rgba(11,12,14,.045)}
.track.active{background:var(--ink);color:#fff;transform:translateX(2px)}
.track.active .no,.track.active .time{color:rgba(255,255,255,.58)}
.track.active .tt small{color:rgba(255,255,255,.62)}

/* dock */
.dock{position:fixed;left:0;right:0;bottom:0;z-index:12;padding:0 42px 12px;background:linear-gradient(to top,rgba(244,244,241,.99) 0%,rgba(244,244,241,.94) 62%,rgba(244,244,241,0) 100%);transition:opacity .6s var(--ease),transform .9s var(--ease)}
body.is-choice .dock{opacity:.18;transform:translateY(12px)}
body.is-sheet .dock{opacity:0;transform:translateY(20px)}
#wave{display:block;width:100%;height:92px;cursor:pointer;touch-action:none;outline:none}
#wave:focus-visible{outline:1px solid var(--line-strong,rgba(11,12,14,.22));outline-offset:4px}
.dock-row{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:18px;padding-top:7px;border-top:1px solid var(--line)}
.now{display:flex;align-items:baseline;gap:12px;min-width:0}
.now-kicker{font:8px/1 Consolas,"SFMono-Regular",monospace;letter-spacing:.22em;color:var(--muted);flex:0 0 auto}
.now strong{font-size:12.5px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.now #nowMeta{font:8.5px/1 Consolas,"SFMono-Regular",monospace;letter-spacing:.12em;color:var(--muted);white-space:nowrap}
.transport{display:flex;align-items:center;gap:6px}
.icon-btn,.play-btn{appearance:none;border:0;background:transparent;display:grid;place-items:center;cursor:pointer;color:var(--ink);transition:opacity .3s,transform .35s var(--spring),background .35s}
.icon-btn{width:34px;height:34px;border-radius:50%}
.icon-btn svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:1.4;stroke-linecap:round;stroke-linejoin:round}
.icon-btn:hover{background:rgba(11,12,14,.055)}
.icon-btn.ghost[aria-pressed="true"]{background:var(--ink);color:#fff}
.play-btn{width:48px;height:48px;border-radius:50%;background:var(--ink);color:#fff;margin:0 4px}
.play-btn:hover{transform:scale(1.055)}
.play-btn svg{width:17px;height:17px;fill:currentColor;stroke:none}
.play-btn .icon-pause{display:none}
body.is-playing .play-btn .icon-play{display:none}
body.is-playing .play-btn .icon-pause{display:block}
.meta{display:flex;align-items:center;justify-content:flex-end;gap:7px;font:9px/1 Consolas,"SFMono-Regular",monospace;color:var(--muted)}
.meta i{font-style:normal;opacity:.4}
.meta #cur{color:var(--ink)}
.meta input{appearance:none;width:86px;height:1px;background:rgba(11,12,14,.2);margin-left:12px;outline:none;cursor:pointer}
.meta input::-webkit-slider-thumb{appearance:none;width:9px;height:9px;border-radius:50%;background:var(--ink);border:0}
.meta input::-moz-range-thumb{width:9px;height:9px;border-radius:50%;background:var(--ink);border:0}
.meta b{font-weight:400;color:var(--ink);width:18px;text-align:right}

/* choice */
.choice{position:fixed;inset:0;z-index:50;display:grid;place-items:center;background:rgba(244,244,241,.3);-webkit-backdrop-filter:blur(18px) saturate(1.05);backdrop-filter:blur(18px) saturate(1.05);opacity:0;clip-path:circle(0% at 50% 48%);transition:opacity .55s var(--ease),clip-path 1.05s var(--ease);will-change:clip-path}
.choice[hidden]{display:none}
.choice.is-open{opacity:1;clip-path:circle(150% at 50% 48%)}
.choice.is-behind{opacity:0;pointer-events:none}
.choice-glass{position:absolute;inset:0;pointer-events:none;background:radial-gradient(42% 46% at 50% 44%,rgba(255,255,255,.55),rgba(255,255,255,0) 72%)}
.choice-inner{position:relative;width:min(900px,calc(100vw - 72px));padding:20px 0 10px;transform:translateY(18px);opacity:0;transition:transform 1s var(--ease),opacity .8s var(--ease)}
.choice.is-open .choice-inner{transform:none;opacity:1}
.choice-kicker{margin:0 0 20px;font:9px/1 Consolas,"SFMono-Regular",monospace;letter-spacing:.28em;color:var(--muted)}
.choice h2{margin:0;font-size:clamp(38px,4.2vw,66px);line-height:1.02;letter-spacing:-.06em;font-weight:600}
.choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:42px}
.choice-card{appearance:none;border:1px solid var(--line);background:rgba(255,255,255,.66);text-align:left;border-radius:22px;padding:26px 26px 22px;min-height:208px;display:flex;flex-direction:column;cursor:pointer;
  transform:translateY(26px) scale(.975);opacity:0;transition:transform .9s var(--spring),opacity .65s var(--ease),background .35s,border-color .35s,box-shadow .45s}
.choice.is-open .choice-card{transform:none;opacity:1}
.choice.is-open .choice-card:nth-child(1){transition-delay:.16s}
.choice.is-open .choice-card:nth-child(2){transition-delay:.24s}
.choice-card:hover{background:#fff;border-color:rgba(11,12,14,.2);box-shadow:0 24px 70px rgba(11,12,14,.07);transform:translateY(-5px)}
.choice-card>span{font:9px/1 Consolas,"SFMono-Regular",monospace;letter-spacing:.16em;color:var(--muted)}
.choice-card h3{margin:22px 0 0;font-size:25px;font-weight:600;letter-spacing:-.03em}
.choice-card p{margin:9px 0 0;font-size:12px;line-height:1.8;color:var(--soft)}
.choice-card i{margin-top:auto;padding-top:24px;font:9px/1 Consolas,"SFMono-Regular",monospace;letter-spacing:.18em;color:var(--ink);font-style:normal;display:flex;align-items:center;gap:8px}
.choice-card i b{font-size:12px;transition:transform .35s var(--spring)}
.choice-card:hover i b{transform:translate(3px,-3px)}
.choice-close{appearance:none;border:0;background:transparent;margin-top:28px;padding:8px 0;font:9px/1 Consolas,"SFMono-Regular",monospace;letter-spacing:.2em;color:var(--muted);cursor:pointer;transition:color .3s}
.choice-close:hover{color:var(--ink)}

/* sheet */
.sheet-wrap{position:fixed;inset:0;z-index:60;display:flex;align-items:flex-end;justify-content:center;background:rgba(244,244,241,.34);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);opacity:0;pointer-events:none;transition:opacity .5s var(--ease)}
.sheet-wrap[hidden]{display:none}
.sheet-wrap.is-open{opacity:1;pointer-events:auto}
.sheet{width:min(1280px,100%);height:min(92vh,920px);background:var(--paper);border-radius:26px 26px 0 0;display:flex;flex-direction:column;overflow:hidden;
  transform:translateY(104%);transition:transform .9s var(--ease);box-shadow:0 -30px 120px rgba(11,12,14,.14)}
.sheet-wrap.is-open .sheet{transform:none}
.sheet-head{flex:0 0 auto;height:64px;display:flex;align-items:center;gap:16px;padding:0 24px;border-bottom:1px solid var(--line);background:rgba(251,251,249,.94);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}
.sheet-head>span{font-size:13px;font-weight:500;letter-spacing:.02em;flex:1;text-align:center}
.sheet-back,.sheet-close{appearance:none;border:0;background:transparent;cursor:pointer;padding:8px 4px;color:var(--soft);font-size:11px;letter-spacing:.04em;transition:color .3s}
.sheet-close{width:34px;height:34px;border:1px solid var(--line);border-radius:50%;display:grid;place-items:center;font-size:18px;line-height:1;color:var(--ink);padding:0}
.sheet-back:hover,.sheet-close:hover{color:var(--ink);border-color:rgba(11,12,14,.25)}
.sheet-body{flex:1;min-height:0;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:rgba(11,12,14,.22) transparent}\n.sheet-body::-webkit-scrollbar{width:5px;height:5px}\n.sheet-body::-webkit-scrollbar-thumb{background:rgba(11,12,14,.18);border-radius:9px}\n.sheet-body::-webkit-scrollbar-track{background:transparent}

/* service */
.svc{display:grid;grid-template-columns:250px minmax(0,1fr);min-height:100%;background:var(--paper)}
.svc-nav{border-right:1px solid var(--line);padding:28px 22px 24px;display:flex;flex-direction:column;position:sticky;top:0;align-self:start;height:calc(92vh - 64px);max-height:920px;background:rgba(251,251,249,.9)}
.svc-nav-top{display:flex;flex-direction:column;gap:7px;padding-bottom:22px;border-bottom:1px solid var(--line-soft)}
.svc-nav-top span{font:8px/1 Consolas,"SFMono-Regular",monospace;letter-spacing:.22em;color:var(--muted)}
.svc-nav-top b{font-size:14px;font-weight:500}
.svc-index{display:flex;flex-direction:column;gap:2px;margin:18px 0;padding:0}
.svc-index button{appearance:none;border:0;border-left:1px solid transparent;background:transparent;text-align:left;padding:11px 10px;display:grid;grid-template-columns:22px 1fr;grid-template-rows:auto auto;column-gap:2px;cursor:pointer;color:var(--soft);transition:background .3s,color .3s,border-color .3s}
.svc-index button span{grid-row:1/3;font:8px/1.3 Consolas,"SFMono-Regular",monospace;color:#a4a7a9;padding-top:2px}
.svc-index button b{font-size:11.5px;font-weight:500}
.svc-index button i{font:7.5px/1.4 Consolas,"SFMono-Regular",monospace;letter-spacing:.13em;color:#a4a7a9;font-style:normal}
.svc-index button:hover{background:rgba(11,12,14,.035);color:var(--ink)}
.svc-index button.active{background:rgba(11,12,14,.05);color:var(--ink);border-left-color:var(--ink)}
.svc-index button.active span{color:var(--ink)}
.svc-nav-bottom{margin-top:auto;padding-top:18px;border-top:1px solid var(--line-soft);display:flex;flex-direction:column;gap:6px}
.svc-nav-bottom span{font-size:12px;font-weight:500}
.svc-nav-bottom small{font:8px/1.4 Consolas,"SFMono-Regular",monospace;letter-spacing:.06em;color:var(--muted)}
.svc-nav-bottom button{appearance:none;border:1px solid var(--line);background:transparent;border-radius:6px;margin-top:8px;padding:9px 10px;text-align:left;font-size:10px;cursor:pointer;transition:background .3s,border-color .3s}
.svc-nav-bottom button:hover{background:#fff;border-color:rgba(11,12,14,.22)}
.svc-main{min-width:0;scroll-behavior:smooth}
.svc-section{padding:52px 58px 64px;border-bottom:1px solid var(--line-soft)}
.svc-section:last-child{border-bottom:0}
.svc-kicker{margin:0 0 18px;font:8.5px/1 Consolas,"SFMono-Regular",monospace;letter-spacing:.24em;color:var(--muted)}
.svc-section h2{margin:0;font-size:clamp(30px,3vw,48px);line-height:1.16;letter-spacing:-.045em;font-weight:500;max-width:820px}
.svc-section h2 span{color:#9a9c9e}
.svc-lede{margin:18px 0 0;max-width:650px;font-size:12px;line-height:1.95;color:var(--soft)}
.svc-hero h2{font-size:clamp(36px,4vw,62px)}
.svc-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 34px;margin-top:38px;border-top:1px solid var(--line)}
.svc-card{display:grid;grid-template-columns:24px 1fr;gap:10px;padding:18px 0 20px;border-bottom:1px solid var(--line-soft)}
.svc-no{font:8px/1.5 Consolas,"SFMono-Regular",monospace;color:#a4a7a9;padding-top:4px}
.svc-card h3{margin:0;font-size:12.5px;font-weight:500;letter-spacing:.01em}
.svc-card h3 i{font:7.5px/1 Consolas,"SFMono-Regular",monospace;letter-spacing:.14em;color:#a4a7a9;font-style:normal;margin-left:8px}
.svc-card p{margin:7px 0 0;font-size:10.5px;line-height:1.8;color:var(--soft)}
.svc-chain{display:flex;align-items:center;gap:10px;margin-top:26px;font:8px/1 Consolas,"SFMono-Regular",monospace;letter-spacing:.1em;color:var(--muted)}
.svc-chain i{width:22px;height:1px;background:var(--line);display:block}
.svc-tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);margin-top:30px;border:1px solid var(--line)}
.svc-tier{background:#fff;padding:20px 20px 18px;display:flex;flex-direction:column;gap:5px}
.svc-tier span{font:8px/1 Consolas,"SFMono-Regular",monospace;color:var(--muted)}
.svc-tier b{font-size:25px;font-weight:500;letter-spacing:-.03em}
.svc-tier small{font:8px/1 Consolas,"SFMono-Regular",monospace;letter-spacing:.08em;color:var(--muted)}
.svc-table{margin-top:28px;border-top:1px solid var(--line)}
.svc-tr{display:grid;grid-template-columns:1.6fr repeat(4,1fr);gap:10px;padding:11px 0;border-bottom:1px solid var(--line-soft);font-size:10.5px;color:var(--soft)}
.svc-tr span:not(:first-child){text-align:right;font-family:Consolas,"SFMono-Regular",monospace;font-size:9.5px}
.svc-th{font:8px/1.4 Consolas,"SFMono-Regular",monospace;letter-spacing:.1em;color:#a4a7a9}
.svc-th span:not(:first-child){color:#a4a7a9}
.svc-example{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-top:22px;padding:18px 20px;background:#fff;border:1px solid var(--line)}
.svc-example p{margin:7px 0 0;font:9px/1.7 Consolas,"SFMono-Regular",monospace;color:var(--soft)}
.svc-example p b{color:var(--ink)}
.svc-example-total{text-align:right;flex:0 0 auto}
.svc-example-total span{display:block;font:8px/1 Consolas,"SFMono-Regular",monospace;color:var(--muted)}
.svc-example-total b{display:block;font-size:26px;font-weight:500;letter-spacing:-.03em;margin-top:4px}
.svc-example-total small{display:block;font-size:8px;color:var(--muted);margin-top:3px}
.svc-note{margin:16px 0 0;font-size:9.5px;line-height:1.8;color:var(--muted)}
.svc-buses{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:30px}
.svc-buses div{background:#fff;padding:16px 16px 18px;display:flex;flex-direction:column;gap:5px}
.svc-buses b{font:8px/1 Consolas,"SFMono-Regular",monospace;letter-spacing:.1em;color:var(--muted)}
.svc-buses span{font-size:12px;font-weight:500}
.svc-buses small{font-size:9px;line-height:1.7;color:var(--soft)}
.svc-table-time .svc-tr{grid-template-columns:1.1fr 1fr 2fr}
.svc-table-time .svc-tr span:nth-child(2){text-align:left}
.svc-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.svc-tags span{border:1px solid var(--line);padding:8px 11px;font-size:9px;color:var(--soft);background:#fff}
.svc-tags b{color:var(--ink);font-weight:500}
.svc-options{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:30px}
.svc-options div{background:#fff;padding:14px 14px 15px;display:grid;grid-template-columns:20px 1fr;grid-template-rows:auto auto;gap:2px 5px}
.svc-options b{grid-row:1/3;font:8px/1.6 Consolas,"SFMono-Regular",monospace;color:#a4a7a9;font-weight:400}
.svc-options span{font-size:11px;font-weight:500}
.svc-options small{font-size:8.5px;color:var(--muted)}
.svc-callout{margin-top:24px;padding:20px;border:1px solid var(--line);background:#fff;display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px}
.svc-callout span{font-size:10px;color:var(--muted);flex:0 0 100%}
.svc-callout p{margin:0;flex:1 1 400px;font-size:10.5px;line-height:1.8;color:var(--soft)}
.svc-callout button{appearance:none;border:1px solid var(--ink);background:var(--ink);color:#fff;padding:10px 14px;font-size:9.5px;cursor:pointer;transition:opacity .3s}
.svc-callout button:hover{opacity:.8}
.svc-table-loud .svc-tr{grid-template-columns:1.5fr 1fr .8fr .8fr}
.svc-cta{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-top:34px;padding-top:24px;border-top:1px solid var(--line)}
.svc-cta h3{margin:0 0 8px;font-size:20px;font-weight:500;letter-spacing:-.02em}
.svc-cta p{margin:0;font-size:10px;line-height:1.8;color:var(--soft)}
.svc-cta-price{text-align:right;flex:0 0 auto}
.svc-cta-price span{display:block;font:8px/1.4 Consolas,"SFMono-Regular",monospace;color:var(--muted)}
.svc-cta-price b{font-size:38px;line-height:1;font-weight:500;letter-spacing:-.04em}
.svc-cta-price small{display:block;font:8px/1.4 Consolas,"SFMono-Regular",monospace;color:var(--muted);margin-top:2px}

/* quote */
.quote-frame{display:block;width:100%;height:calc(92vh - 64px);border:0;background:#f7f7f5}

/* responsive */
@media (max-width:1180px){
  .topbar,.hero{padding-left:30px;padding-right:30px}
  .dock{padding-left:30px;padding-right:30px}
  .intro{width:300px}
  .listen{width:270px}
  h1{font-size:clamp(44px,5vw,62px)}
  .svc{grid-template-columns:220px minmax(0,1fr)}
  .svc-section{padding:44px 42px 56px}
}
@media (max-width:900px){
  .topbar{padding:20px 20px}
  .brand img{width:112px}
  .top-center{display:none}
  .version{padding-top:12px}
  .hero{padding:0 20px}
  .intro{width:260px}
  .listen{width:240px;padding-left:18px}
  .track{padding:9px 9px;grid-template-columns:20px 1fr auto;gap:7px}
  .track .tt b{font-size:11.5px}
  .track .tt small{font-size:8px}
  .svc{grid-template-columns:minmax(0,1fr)}
  .svc-nav{position:sticky;top:0;z-index:2;height:auto;max-height:none;border-right:0;border-bottom:1px solid var(--line);padding:14px 16px;display:block;background:rgba(251,251,249,.96);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}
  .svc-nav-top{display:none}
  .svc-index{flex-direction:row;gap:0;margin:0;overflow-x:auto;scrollbar-width:none}
  .svc-index::-webkit-scrollbar{display:none}
  .svc-index button{flex:0 0 auto;grid-template-columns:auto;grid-template-rows:auto;padding:7px 9px;border-left:0;border-bottom:1px solid transparent}
  .svc-index button span{display:none}
  .svc-index button b{font-size:9px;white-space:nowrap}
  .svc-index button i{display:none}
  .svc-index button.active{border-left-color:transparent;border-bottom-color:var(--ink);background:transparent}
  .svc-nav-bottom{display:none}
  .svc-section{padding:26px 18px 38px}
  .svc-section h2{font-size:27px}
  .svc-hero h2{font-size:31px}
  .svc-lede{font-size:11px}
  .svc-grid{grid-template-columns:minmax(0,1fr);gap:0}
  .svc-buses{grid-template-columns:1fr 1fr}
  .svc-options{grid-template-columns:1fr 1fr}
  .svc-tiers{grid-template-columns:1fr}
  .svc-tr{grid-template-columns:1.3fr repeat(2,1fr)}
  .svc-th span:nth-child(4),.svc-th span:nth-child(5),.svc-tr span:nth-child(4),.svc-tr span:nth-child(5){display:none}
  .svc-table-time .svc-tr{grid-template-columns:1fr 1fr}
  .svc-table-time .svc-tr span:nth-child(3){display:none}
  .svc-table-loud .svc-tr{grid-template-columns:1.3fr 1fr .7fr}
  .svc-table-loud .svc-tr span:nth-child(4){display:none}
  .svc-example{flex-direction:column;align-items:flex-start}
  .svc-example-total{text-align:left}
  .svc-cta{flex-direction:column;align-items:flex-start}
  .svc-cta-price{text-align:left}
  .quote-frame{height:calc(100vh - 64px)}
  .sheet{height:96vh;border-radius:20px 20px 0 0}
  .sheet-wrap{background:rgba(244,244,241,.5)}
}
@media (max-width:720px){
  .topbar{padding:16px 16px}
  .brand img{width:104px}
  .brand span{font-size:7px}
  .version{font-size:8px}
  .hero{display:block;padding:0}
  .intro{position:absolute;left:18px;top:92px;width:calc(100% - 36px);transform:none}
  .eyebrow{margin-bottom:18px;font-size:8px}
  .eyebrow span{width:18px}
  h1{font-size:43px;line-height:1.02;letter-spacing:-.06em}
  .lede{margin-top:16px;font-size:11.5px;line-height:1.8;max-width:250px}
  .core-hint{margin-top:18px;font-size:9px;letter-spacing:.1em}
  .listen{position:absolute;left:14px;right:14px;top:auto;bottom:166px;width:auto;transform:none;border-left:0;border-top:1px solid var(--line);padding:10px 0 0}
  .listen-head{padding-bottom:8px}
  .tracks{flex-direction:row;gap:8px;overflow-x:auto;scrollbar-width:none;padding-bottom:1px}
  .tracks::-webkit-scrollbar{display:none}
  .track{flex:0 0 172px;margin:0;padding:10px 11px;grid-template-columns:20px 1fr;grid-template-rows:auto auto;gap:2px 6px;border:1px solid var(--line);border-radius:9px}
  .track .no{grid-row:1/3}
  .track .tt b{font-size:10.5px}
  .track .tt small{font-size:7.5px;margin-top:2px}
  .track .time{display:none}
  .track.active{transform:none;border-color:var(--ink)}
  .dock{padding:0 14px 8px}
  #wave{height:68px}
  .dock-row{grid-template-columns:1fr auto;grid-template-rows:auto auto;gap:3px 10px;padding-top:5px}
  .now{display:block;min-width:0}
  .now-kicker{display:block;font-size:7px;margin-bottom:4px}
  .now strong{font-size:11px;display:inline-block;max-width:120px}
  .now #nowMeta{display:none}
  .transport{grid-row:2;grid-column:1/3;justify-self:center;margin-top:0}
  .play-btn{width:44px;height:44px}
  .icon-btn{width:30px;height:30px}
  .meta{grid-column:2;grid-row:1;justify-self:end;margin-top:0;gap:3px;font-size:8px}
  .meta input{width:42px;margin-left:3px}
  .meta b{width:14px;font-size:8px}
  body.is-choice .hero{opacity:0}
  .choice-inner{width:calc(100vw - 36px);padding:0}
  .choice h2{font-size:40px}
  .choice-grid{grid-template-columns:1fr;gap:10px;margin-top:28px}
  .choice-card{min-height:0;padding:20px 20px 18px;border-radius:18px}
  .choice-card h3{margin-top:14px;font-size:21px}
  .choice-card p{font-size:11px}
  .choice-card i{padding-top:16px}
  .choice-close{margin-top:18px}
  .sheet{height:100vh;border-radius:0}
  .sheet-head{height:56px;padding:0 14px}
  .sheet-body{height:calc(100vh - 56px)}
  .svc-section h2{font-size:25px}
  .svc-hero h2{font-size:28px}
  .svc-section{padding:22px 16px 34px}
  .svc-index button{padding:7px 8px}
  .svc-index button b{font-size:8.5px}
  .svc-card h3 i{display:none}
  .svc-options{grid-template-columns:1fr 1fr}
  .svc-buses{grid-template-columns:1fr 1fr}
  .svc-tags span{font-size:8px}
  .svc-callout{padding:16px}
  .svc-callout p{flex-basis:100%}
  .svc-cta-price b{font-size:32px}
  .quote-frame{height:calc(100vh - 56px)}
}
.contact-entry{
  appearance:none;background:none;border:0;padding:17px 0 6px;margin:0;
  font:9px/1 Consolas,"SFMono-Regular",monospace;letter-spacing:.12em;color:var(--ink);
  border-bottom:1px solid rgba(11,12,14,.28);cursor:pointer;white-space:nowrap;
}
.contact-entry:hover{border-bottom-color:var(--ink)}
.contact-modal{position:fixed;inset:0;z-index:80;display:grid;place-items:center;padding:24px}
.contact-modal[hidden]{display:none}
.contact-modal-backdrop{position:absolute;inset:0;background:rgba(244,244,241,.76);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);opacity:0;transition:opacity .35s var(--ease)}
.contact-modal-panel{
  position:relative;display:grid;grid-template-columns:minmax(0,1fr) 248px;gap:34px;align-items:center;
  width:min(92vw,780px);max-height:calc(100vh - 48px);overflow:auto;
  padding:38px;border-radius:26px;background:#0b0c0e;color:#f4f4f1;
  box-shadow:0 34px 90px rgba(0,0,0,.24);opacity:0;transform:translateY(18px) scale(.97);
  transition:opacity .45s var(--ease),transform .55s var(--ease);
}
.contact-modal.is-open .contact-modal-backdrop{opacity:1}
.contact-modal.is-open .contact-modal-panel{opacity:1;transform:none}
.contact-modal-close{
  position:absolute;right:18px;top:16px;width:34px;height:34px;border-radius:50%;
  border:1px solid rgba(244,244,241,.28);background:transparent;color:#f4f4f1;
  font:17px/1 Arial,sans-serif;cursor:pointer;
}
.contact-modal-close:hover{border-color:#f4f4f1}
.contact-modal-kicker{font:9px/1 Consolas,"SFMono-Regular",monospace;letter-spacing:.24em;color:rgba(244,244,241,.5)}
.contact-modal-copy h2{margin:18px 0 14px;font-size:clamp(30px,4vw,42px);line-height:1.24;font-weight:700;letter-spacing:-.03em}
.contact-modal-lead{font-size:13px;color:#f4f4f1;margin:0 0 14px}
.contact-modal-hint{font-size:11.5px;line-height:1.9;color:rgba(244,244,241,.58);margin:0;max-width:330px}
.contact-modal-meta{margin-top:34px;font:9px/1 Consolas,"SFMono-Regular",monospace;letter-spacing:.18em;color:rgba(244,244,241,.35)}
.contact-modal-meta span{margin:0 7px;color:rgba(244,244,241,.18)}
.contact-modal-card{display:block;border-radius:12px;overflow:hidden;background:#fff;box-shadow:0 18px 50px rgba(0,0,0,.34)}
.contact-modal-card img{display:block;width:100%;height:auto}
@media (max-width:720px){
  .top-actions{gap:10px}
  .contact-entry{font-size:8px;padding-top:17px}
  .contact-modal{padding:12px}
  .contact-modal-panel{grid-template-columns:1fr;gap:22px;width:calc(100vw - 24px);max-height:calc(100vh - 24px);padding:26px 22px 24px;border-radius:20px}
  .contact-modal-copy h2{font-size:30px;margin-top:16px}
  .contact-modal-hint{max-width:none}
  .contact-modal-meta{margin-top:20px}
  .contact-modal-card{width:176px;justify-self:center}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.01ms!important}
}
.audio-notice{
  position:fixed;left:50%;bottom:122px;z-index:80;
  max-width:min(440px,calc(100vw - 40px));
  padding:11px 16px;border-radius:999px;
  background:#0b0c0e;color:#f4f4f1;
  font-size:12px;line-height:1.5;text-align:center;
  opacity:0;transform:translate(-50%,10px);pointer-events:none;
  transition:opacity .3s ease,transform .3s ease;
  box-shadow:0 10px 30px rgba(0,0,0,.22);
}
.audio-notice.show{opacity:1;transform:translate(-50%,0)}
@media (max-width:720px){.audio-notice{bottom:154px;font-size:11px}}

/* ===== 手机竖屏 9:16 专项 ===== */
@media (max-width:720px) and (orientation:portrait){
  .topbar{padding:12px 16px 0;align-items:flex-start}
  .top-center{display:none}
  .version{display:none}
  .brand img{width:88px}
  .brand span{font-size:6.5px;letter-spacing:.18em}
  .top-actions{gap:8px;align-items:flex-start}
  .contact-entry{padding-top:11px;font-size:8px}
  .account-entry{font-size:8px;padding-top:11px}

  /* 1. 文案区：压到 330 以内 */
  .intro{top:72px;left:16px;width:calc(100% - 32px);transform:none}
  .eyebrow{margin-bottom:10px}
  h1{font-size:38px;line-height:1.02;letter-spacing:-.055em}
  .lede{margin-top:10px;font-size:10.5px;line-height:1.7;max-width:100%}
  .core-hint{margin-top:10px;font-size:8px}

  .tune-entry,.udg-entry{
    width:100%;margin-top:7px;padding:9px 12px;border-radius:11px;
    background:rgba(255,255,255,.94);
  }
  .tune-entry .te-main b,.udg-entry .ue-main b{font-size:12px}
  .tune-entry .te-main span,.udg-entry .ue-main span{font-size:7px;margin-top:2px}

  /* 2. 3D 球：缩到中间空档，不再压到 LISTEN */
  body:not(.is-choice):not(.is-sheet) #stage{transform:translateY(5vh) scale(.9)}
  body:not(.is-choice):not(.is-sheet) .stage-halo{top:55%;width:70vw;filter:blur(22px)}
  .stage-grid{height:30vh;opacity:.08}

  /* 3. LISTEN：固定在中段，加浅底避免和球体糊在一起 */
  .listen{
    position:fixed;
    top:auto;
    bottom:calc(147px + 12px);
    left:12px;right:12px;
    width:auto;
    margin-top:0;
    padding:6px 0 0;
    border-left:0;
    background:linear-gradient(to right,rgba(244,244,241,.97),rgba(244,244,241,.86));
    transform:none;
  }
  .listen-head{padding-bottom:6px;font-size:8px}
  .tracks{display:flex;flex-direction:row;overflow-x:auto;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;padding:2px 0 4px;gap:7px}
  .track{scroll-snap-align:start;flex:0 0 78vw;margin:0;padding:11px 12px;border-radius:10px;background:rgba(255,255,255,.72)}
  .track .tt b{font-size:12px}
  .track .tt small{font-size:8.5px;margin-top:3px}
  .track .no,.track .time{font-size:8px}
  .track.active{transform:none}

  /* 手机降负载：关掉混色/大模糊，保住滚动与转球顺滑 */
  .choice{-webkit-backdrop-filter:blur(8px) saturate(1);backdrop-filter:blur(8px) saturate(1)}
  .sheet-wrap{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}
  .grain{display:none}
  .stage-grid{mix-blend-mode:normal;opacity:.06}
  .stage-halo{filter:blur(18px)}
  #stage{-webkit-transform-style:flat;transform-style:flat}
  .tune-entry:hover,.udg-entry:hover{transform:none}

  .dock{padding:0 14px calc(8px + env(safe-area-inset-bottom,0px))}
  #wave{height:46px}
  .dock-row{gap:10px;padding-top:6px}
  .now-line{font-size:8.5px}
  .now-name{font-size:12px}
  .dock-btns{gap:14px}
}
/* ===== core cue (visual affordance on the 3D core) ===== */
.core-cue{position:fixed;left:var(--core-x,50%);top:var(--core-y,47%);
  width:calc(var(--core-r,168px) * 2);aspect-ratio:1;
  transform:translate(-50%,-50%);z-index:3;pointer-events:none;
  display:grid;place-items:center;
  transition:opacity .55s var(--ease),transform .55s var(--ease)}
.core-cue.is-off,body.is-choice .core-cue,body.is-sheet .core-cue{
  opacity:0;transform:translate(-50%,-50%) scale(1.05)}

.core-cue::after{content:"";position:absolute;inset:7%;border-radius:50%;
  border:1px solid rgba(11,12,14,.13);
  animation:ccIntro 1.5s cubic-bezier(.22,1,.36,1) .35s 1 both}
@keyframes ccIntro{0%{transform:scale(.6);opacity:0;border-color:rgba(11,12,14,.42)}
  45%{opacity:.85}
  100%{transform:scale(1);opacity:1;border-color:rgba(11,12,14,.13)}}
.cc-ring{position:absolute;inset:0;border-radius:50%;
  border:1px solid rgba(11,12,14,.32);
  animation:ccPulse 3.4s cubic-bezier(.4,0,.2,1) infinite}
.cc-ring-b{animation-delay:1.7s;border-color:rgba(162,59,47,.40)}
@keyframes ccPulse{
  0%{transform:scale(1.16);opacity:0}
  15%{opacity:.9}
  66%{opacity:.12}
  100%{transform:scale(.9);opacity:0}
}

.cc-tip{position:absolute;left:50%;top:72%;transform:translate(-50%,0);
  display:flex;flex-direction:column;align-items:center;gap:3px;
  padding:8px 15px 7px;border-radius:999px;white-space:nowrap;
  background:rgba(251,250,246,.92);border:1px solid rgba(11,12,14,.09);
  box-shadow:0 8px 26px rgba(11,12,14,.10);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  animation:ccBob 3.4s ease-in-out infinite}
.cc-tip b{font:600 11.5px/1 "Microsoft YaHei",system-ui,sans-serif;letter-spacing:.12em;color:#0b0c0e}
.cc-tip i{font:400 9px/1 "Microsoft YaHei",system-ui,sans-serif;letter-spacing:.16em;
  color:rgba(11,12,14,.55);font-style:normal}
@keyframes ccBob{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,-4px)}}

.cc-arrow{display:none}
.cc-arrow::before{content:""}

@media (prefers-reduced-motion: reduce){
  .cc-ring{animation:none;opacity:.22}
}

@media (max-width:820px){
  .core-cue{/* position driven by --core-x/--core-y/--core-r */}
  .cc-ring{border-color:rgba(11,12,14,.22)}
  .cc-ring-b{border-color:rgba(162,59,47,.28)}

  .cc-tip{top:72%;transform:translateX(-50%);
    flex-direction:row;align-items:baseline;gap:6px;
    padding:7px 13px;animation:ccBobM 3.4s ease-in-out infinite}
  .cc-tip b{font-size:10.5px;letter-spacing:.1em}
  .cc-tip i{font-size:9px;letter-spacing:.1em}
  .cc-tip i::before{content:"· ";}
  @keyframes ccBobM{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,-3px)}}
}

/* ===== 矮屏手机（微信/Safari 底部栏占位，vh 常只有 ~690）===== */
@media (max-width:820px) and (max-height:800px){
  .intro{top:56px}
  .intro .lede,.intro .core-hint{display:none}
  .intro h1{font-size:33px}
  .intro .eyebrow{font-size:8.5px}
  body:not(.is-choice):not(.is-sheet) #stage{transform:translateY(-4vh) scale(.74)}
  body:not(.is-choice):not(.is-sheet) .stage-halo{top:44%;width:72vw;filter:blur(20px)}
  .tracks{height:58px}
  .cc-tip{top:calc(100% - 6px)}
  .tune-entry,.udg-entry{padding:7px 11px;border-radius:10px}
  .tune-entry .te-main b,.udg-entry .ue-main b{font-size:11px}
  .tune-entry .te-main span,.udg-entry .ue-main span{font-size:6.5px;margin-top:1px}
  .listen{padding:4px 0 0}
  .listen-head{padding-bottom:4px;font-size:7.5px}
  .track{padding:9px 11px}
  .track b{font-size:13px}
  .track span{font-size:7px}
}

/* 桌面：提示胶囊放到球下方，不压球体 */
@media (min-width:821px){
  /* 球体半径 = 盒半径 / 1.42 → 球底在盒高 85% 处，胶囊贴其下沿 */
  .cc-tip{top:calc(85% + 8px)}
}