@property --hero-a{syntax:"<color>";inherits:true;initial-value:#e7e4fb}
@property --hero-b{syntax:"<color>";inherits:true;initial-value:#f2f1f8}

html.theming{transition:--hero-a .4s var(--ease),--hero-b .4s var(--ease)}
html.theming *,html.theming *::before,html.theming *::after{
  transition-property:background-color,border-color,color,fill,box-shadow;
  transition-duration:.4s;transition-timing-function:var(--ease)}

:root{
  --bg:#f2f1f8; --fg:#1d1d1f; --muted:#5f5f68; --faint:#8e8e99;
  --rule:#e4e2ef; --card:#ecebf5; --card-line:#e2e0ee;
  --accent:#5b4fd6; --bright:#8b81fc; --soft:#eeecff; --seg-on:#e6e2ff; --on-accent:#fff;
  --surface:#fff;
  --card-shadow:none;
  --pop-shadow:0 2px 6px rgba(0,0,0,.05), 0 12px 32px rgba(91,79,214,.18);
  --shadow:0 1px 2px rgba(91,79,214,.06), 0 10px 30px rgba(91,79,214,.10);
  --hero-a:#e7e4fb; --hero-b:#f2f1f8;
  --bar:52px; --safe:env(safe-area-inset-top,0px);
  --ease:cubic-bezier(.22,.61,.36,1);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0d0c16; --fg:#f5f5f7; --muted:#a6a6ae; --faint:#83838f;
    --rule:#23213a; --card:#100f1c; --card-line:#2b2942;
    --accent:#a79dff; --bright:#8b81fc; --soft:#221e42; --seg-on:#3d3578; --on-accent:#0d0c16;
    --surface:#17162a;
    --card-shadow:none;
    --pop-shadow:0 12px 36px rgba(0,0,0,.66);
    --shadow:0 1px 2px rgba(0,0,0,.5), 0 10px 30px rgba(0,0,0,.45);
    --hero-a:#241f47; --hero-b:#0d0c16;
  }
}
:root[data-theme="dark"]{
    --bg:#0d0c16; --fg:#f5f5f7; --muted:#a6a6ae; --faint:#83838f;
    --rule:#23213a; --card:#100f1c; --card-line:#2b2942;
    --accent:#a79dff; --bright:#8b81fc; --soft:#221e42; --seg-on:#3d3578; --on-accent:#0d0c16;
    --surface:#17162a;
    --card-shadow:none;
    --pop-shadow:0 12px 36px rgba(0,0,0,.66);
    --shadow:0 1px 2px rgba(0,0,0,.5), 0 10px 30px rgba(0,0,0,.45);
    --hero-a:#241f47; --hero-b:#0d0c16;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);overflow-x:hidden;
  font:17px/1.75 -apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",
       "PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;-webkit-text-size-adjust:100%;
  transition:background-color .35s var(--ease),color .3s ease}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
p{margin:13px 0}
strong{color:var(--fg);font-weight:600}
code{background:var(--card);border:1px solid var(--card-line);border-radius:6px;
     padding:2px 8px;font:15px/1.4 ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--fg)}

.wordmark{letter-spacing:-.01em;white-space:nowrap}
.wordmark .w1{font-weight:700;font-style:italic}
.wordmark .w2{font-weight:400;color:var(--muted)}

html[data-active="zh"] [data-lang="en"]{display:none}
html[data-active="en"] [data-lang="zh"]{display:none}

.nav{position:fixed;top:calc(12px + var(--safe));left:14px;right:14px;z-index:30;
     display:flex;align-items:center;pointer-events:none}
.nav > *{pointer-events:auto}
.nav .gearwrap{margin-left:auto}
.back{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;
      color:var(--fg);background:color-mix(in srgb,var(--bg) 72%,transparent);
      -webkit-backdrop-filter:saturate(180%) blur(12px);
      backdrop-filter:saturate(180%) blur(12px);
      border:1px solid var(--card-line);
      transition:background .2s ease,color .2s ease,border-color .2s ease}
.back svg{width:18px;height:18px}
.back:hover{background:var(--soft);color:var(--accent);border-color:var(--soft);text-decoration:none}
.gearwrap{position:relative}
.gear{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;
      color:var(--fg);background:color-mix(in srgb,var(--bg) 72%,transparent);
      -webkit-backdrop-filter:saturate(180%) blur(12px);
      backdrop-filter:saturate(180%) blur(12px);
      border:1px solid var(--card-line);cursor:pointer;appearance:none;padding:0;
      transition:background .2s ease,color .2s ease,border-color .2s ease}
.gear svg{width:18px;height:18px;transition:transform .35s var(--ease)}
.gear:hover{background:var(--soft);color:var(--accent);border-color:var(--soft)}
.gear[aria-expanded="true"]{background:var(--soft);color:var(--accent);border-color:var(--soft)}
.gear[aria-expanded="true"] svg{transform:rotate(60deg)}
.prefs{position:absolute;top:44px;right:0;width:216px;padding:13px;text-align:left;
       background:var(--surface);border-radius:16px;box-shadow:var(--pop-shadow);
       opacity:0;transform:translateY(-6px) scale(.97);transform-origin:100% 0;
       pointer-events:none;
       transition:opacity .2s var(--ease),transform .2s var(--ease)}
.prefs.open{opacity:1;transform:none;pointer-events:auto}
.prefs-t{margin:0 0 7px;font-size:11px;font-weight:700;letter-spacing:.09em;
         text-transform:uppercase;color:var(--faint)}
.seg{position:relative;display:flex;background:var(--card);border-radius:11px;
     overflow:hidden;margin:0 0 14px}
.seg:last-child{margin-bottom:0}
.seg::before{content:"";position:absolute;top:0;bottom:0;left:0;pointer-events:none;
  width:calc(100% / var(--n,2));background:var(--seg-on);border-radius:9px;
  transform:translateX(calc(var(--i,0) * 100%));transition:none}
.seg.ready::before{transition:transform .34s var(--ease),background-color .4s var(--ease)}
.seg button{position:relative;z-index:1;flex:1;appearance:none;border:0;background:none;
  cursor:pointer;color:var(--muted);font:600 13px/1 inherit;padding:9px 4px;
  display:flex;align-items:center;justify-content:center;gap:5px;
  transition:color .25s ease,transform .18s var(--ease)}
.seg button svg{width:14px;height:14px;flex:none}
.seg button:hover{color:var(--fg)}
.seg button:active{transform:scale(.94)}
.seg button[aria-pressed="true"]{color:var(--accent)}

.hero{position:relative;text-align:center;
      background:radial-gradient(130% 62% at 50% 0%,var(--hero-a) 0%,var(--hero-b) 72%)}
.hero-in{max-width:820px;margin:0 auto;padding:18px 24px 56px}
.hero.bare,.hero.sm{min-height:100vh;min-height:100svh;display:flex;flex-direction:column;
                    justify-content:center;padding:calc(76px + var(--safe)) 0 96px}
.hint{position:absolute;left:50%;bottom:calc(26px + env(safe-area-inset-bottom,0px));
      transform:translateX(-50%);color:var(--faint);display:grid;place-items:center;gap:6px;
      font-size:12px;letter-spacing:.08em;white-space:nowrap;
      transition:opacity .4s var(--ease)}
html:not(.js) .hint{display:none}
.hint.gone{opacity:0}
.hint svg{width:16px;height:16px;animation:bob 1.9s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(4px)}}
.appicon{width:186px;height:186px;display:block;margin:-18px auto -10px}
.hero.sm .appicon{width:104px;height:104px;margin:6px auto 12px}
.hero .wordmark{font-size:20px;display:block}
.hero h1.wordmark{font-size:clamp(32px,5.4vw,52px);margin:14px 0 0}
.hero h1.wordmark .w2{color:var(--faint)}
h1{font-size:clamp(30px,5.4vw,50px);line-height:1.1;margin:10px 0 0;
   letter-spacing:-.028em;font-weight:700}
.claim{margin:14px 0 0;font-weight:700;letter-spacing:-.02em;color:var(--accent);
       font-size:clamp(19px,3.2vw,30px);line-height:1.3}
html[data-active="zh"] .claim{transform:translateX(.2em)}
.sub{margin:14px auto 0;max-width:560px;color:var(--muted)}
.date{color:var(--faint);font-size:14px;margin:22px 0 0}

.stage{position:relative;text-align:center;
       background:radial-gradient(130% 62% at 50% 0%,var(--hero-a) 0%,var(--hero-b) 72%)}
html.js .stage{height:300vh}
.stage-in{max-width:820px;margin:0 auto;padding:24px 24px 40px}
html.js .stage-in{position:sticky;top:0;height:100vh;height:100svh;
                  display:grid;place-items:center;padding-top:calc(var(--bar) + var(--safe))}
.stack{display:flex;flex-direction:column;align-items:center;width:100%}
.slot{position:relative;width:100%;margin-top:22px}
html.js .grp{position:absolute;left:0;right:0;top:0}
html.js .g-claim{opacity:0}
html.js .g-title,html.js .g-claim{will-change:transform,opacity}
.stage .appicon{width:206px;height:206px;margin:-28px auto;
                transform-origin:center 86.4%;will-change:transform}
.stage .wordmark{font-size:21px;display:block;margin:0}
.hint{position:absolute;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));
      transform:translateX(-50%);color:var(--faint);display:grid;place-items:center;gap:6px;
      font-size:12px;letter-spacing:.08em;will-change:opacity;transition:opacity .4s var(--ease)}
html:not(.js) .hint{display:none}
.hint svg{width:16px;height:16px;animation:bob 1.9s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(4px)}}

.chips{display:flex;flex-wrap:wrap;gap:9px;justify-content:center;margin:26px 0 0}
.chip{display:inline-flex;align-items:center;gap:6px;background:var(--surface);
      border-radius:980px;padding:8px 15px;color:var(--muted);font-size:13.5px;font-weight:600}
.chip svg{width:14px;height:14px;color:var(--bright);flex:none}

.cta{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin:30px 0 0}
.btn{display:inline-flex;align-items:center;gap:8px;border-radius:980px;
     padding:13px 24px;font-size:16px;font-weight:600;letter-spacing:-.01em;
     border:1px solid var(--accent);color:var(--accent);background:none;
     transition:background .2s ease,color .2s ease}
.btn:hover{text-decoration:none;background:var(--soft)}
.btn.solid{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}
.btn.solid:hover{background:var(--bright);border-color:var(--bright);color:var(--on-accent)}
.btn svg{width:17px;height:17px}

.cta.main{margin-top:38px}
.store-badge{display:inline-flex;align-items:center;line-height:0}
.store-badge:hover{text-decoration:none}
.store-badge img{height:54px;width:auto;display:block}
.store-badge .badge-dark{display:none}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]) .store-badge .badge-light{display:none}
  :root:not([data-theme="light"]) .store-badge .badge-dark{display:block}
}
:root[data-theme="dark"] .store-badge .badge-light{display:none}
:root[data-theme="dark"] .store-badge .badge-dark{display:block}
.store-badge[aria-disabled="true"]{cursor:default}

main{max-width:760px;margin:0 auto;padding:0 24px}
.wide{max-width:960px}
.head{padding:56px 0 4px}
.head h2{margin:0}
.eyebrow{color:var(--accent);font-size:12px;font-weight:700;letter-spacing:.1em;
         text-transform:uppercase;margin:0 0 8px}
h2{font-size:clamp(20px,3vw,25px);line-height:1.28;margin:0 0 12px;
   letter-spacing:-.018em;font-weight:650}
.lede{color:var(--muted);margin:0 0 6px;max-width:620px}

.row{padding:38px 0;border-top:1px solid var(--rule);
     display:grid;grid-template-columns:44px 1fr;gap:20px;align-items:start}
.row:first-of-type{border-top:0}
.row p{color:var(--muted)}
.row p:first-child{margin-top:0}
.sicon{width:44px;height:44px;border-radius:13px;background:var(--soft);
       display:grid;place-items:center;color:var(--accent)}
.sicon svg{width:22px;height:22px}

.feat{display:grid;grid-template-columns:repeat(auto-fit,minmax(272px,1fr));gap:14px;
      margin:26px 0 0}
.f{background:var(--surface);border-radius:18px;padding:22px 20px}
.f .sicon{width:36px;height:36px;border-radius:11px;background:none;color:var(--accent);
          margin:0 0 10px;justify-items:start;place-items:center start}
.f .sicon svg{width:22px;height:22px}
.f h3{margin:0 0 6px;font-size:17px;font-weight:650;letter-spacing:-.012em}
.f p{margin:0;color:var(--muted);font-size:15px;line-height:1.65}

.spec{background:var(--surface);border-radius:18px;overflow:hidden;margin:26px 0 0}
.spec div{display:grid;grid-template-columns:minmax(96px,148px) 1fr;gap:16px;
          padding:14px 20px;border-top:1px solid var(--rule);font-size:15.5px}
.spec div:first-child{border-top:0}
.spec dt,.spec b{color:var(--faint);font-weight:600}
.spec span{color:var(--muted)}

.faq{margin:22px 0 0;border-top:1px solid var(--rule)}
.qa{border-bottom:1px solid var(--rule)}
.q{appearance:none;width:100%;background:none;border:0;cursor:pointer;color:inherit;
   font:inherit;text-align:left;display:flex;align-items:center;gap:14px;
   padding:19px 4px;letter-spacing:-.012em}
.q .qt{flex:1;font-size:16.5px;font-weight:600;line-height:1.5}
.q .chev{width:17px;height:17px;flex:none;color:var(--faint);
         transition:transform .38s var(--ease),color .2s ease}
.q:hover .qt{color:var(--accent)}
.q:hover .chev{color:var(--accent)}
.qa.open .chev{transform:rotate(90deg);color:var(--accent)}
.a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .38s var(--ease)}
.qa.open .a{grid-template-rows:1fr}
.a-in{overflow:hidden}
.a-in p{color:var(--muted);margin:0 0 19px;padding-right:31px;font-size:16px}
.a-in p:first-child{margin-top:-3px}
.a-in ul{color:var(--muted);margin:0 0 19px;padding:0 31px 0 20px;font-size:16px}
.a-in li{margin:5px 0}

.devs{border-top:1px solid var(--rule);margin-top:64px}
.devs-in{max-width:900px;margin:0 auto;padding:64px 24px 72px}
.devs h2{text-align:center}
.devs .lede{text-align:center;margin:0 auto 34px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px}
.card{background:var(--surface);border-radius:20px;
      padding:32px 26px;text-align:center;color:inherit;text-decoration:none;
      transition:transform .4s var(--ease),box-shadow .4s var(--ease),
                 background-color .3s ease}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow);text-decoration:none}
.card img{width:80px;height:80px;border-radius:50%;margin:0 auto 16px;display:block;
          border:1px solid var(--card-line)}
.card .nm{font-size:18px;font-weight:650;letter-spacing:-.01em;margin:0 0 4px}
.card .role{color:var(--accent);font-size:12px;font-weight:700;letter-spacing:.08em;
            text-transform:uppercase;margin:0 0 12px}
.card .bio{color:var(--muted);font-size:15px;line-height:1.65;margin:0 0 14px;text-align:left}
.tags{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin:0 0 16px}
.tag{font-size:12px;font-weight:600;color:var(--accent);background:var(--soft);
     border-radius:980px;padding:5px 11px}
.ghbtn{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--card-line);
       border-radius:980px;padding:8px 16px;font-size:14px;font-weight:600;color:var(--fg)}
.ghbtn svg{width:16px;height:16px}

footer{border-top:1px solid var(--rule);margin-top:64px}
.devs+footer{margin-top:0;border-top:0}
.foot-in{max-width:760px;margin:0 auto;padding:34px 24px 64px;
         color:var(--faint);font-size:13px;text-align:center}
.foot-nav{display:flex;flex-wrap:wrap;gap:8px 22px;justify-content:center;margin:0 0 14px}
.foot-nav a{color:var(--muted);font-size:14px;font-weight:500}

html.js .reveal{opacity:0;transform:translateY(16px);
        transition:opacity .6s var(--ease),transform .6s var(--ease)}
html.js .reveal.in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  html.js .reveal{opacity:1;transform:none;transition:none}
  .hint{display:none}
  html.js .stage{height:auto}
  html.js .stage-in{position:static;height:auto}
  html.js .grp{position:static}
  html.js .g-claim{opacity:1}
  .hint{display:none}
  *{transition-duration:.01ms!important;animation:none!important}
}
@media (max-width:640px){
  :root{--bar:48px}
  .appicon{width:152px;height:152px}
  .hero.bare,.hero.sm{padding:calc(74px + var(--safe)) 0 84px}
  .stage .appicon{width:162px;height:162px;margin:-22px auto}
  .hero-in{padding-bottom:0}
  .row{grid-template-columns:1fr;gap:12px;padding:32px 0}
  .spec div{grid-template-columns:1fr;gap:2px;padding:13px 18px}
  .card .bio{text-align:center}
  .a-in p,.a-in ul{padding-right:0}
  .cta.main{margin-top:32px}
}