/* Elsa Ice & Snow Class */
.topbar > a.back,.topbar a.back{
  display:inline-flex !important;align-items:center;justify-content:center;
  width:auto !important;min-width:42px;height:42px;padding:0 14px !important;
  border-radius:999px !important;border:3px solid var(--ink);background:var(--sun);
  font-family:var(--font-d);font-size:18px;flex:none;text-decoration:none;white-space:nowrap;box-sizing:border-box;
}
:root{
  --ink:#1A3A5C; --ink-2:#3D5A7A; --cream:#F0F8FF; --cream-2:#D6ECFF;
  --ice:#7EC8F5; --ice-2:#B8E4FF; --purple:#8B7CF5; --pink:#F5A3C7; --sun:#FFE08A;
  --blue:#3A8FD6; --green:#3E9B7A; --r:28px;
  --font-d:"ZCOOL KuaiLe","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-b:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{overflow-x:clip;scroll-behavior:smooth;scroll-padding-top:84px}
body{font-family:var(--font-b);color:var(--ink);background:#0B2744;font-size:18px;line-height:1.7;overflow-x:clip;-webkit-tap-highlight-color:transparent}
img{max-width:100%;display:block}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}
a{color:inherit}
[hidden]{display:none!important}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
:focus-visible{outline:4px solid var(--sun);outline-offset:3px;border-radius:12px}
html.lang-en .zh{display:none!important}
html.lang-zh .en{display:none!important}

.topbar{position:fixed;inset:12px 12px auto;z-index:50;display:flex;align-items:center;gap:12px;padding:8px 10px 8px 16px;background:rgba(240,248,255,.95);backdrop-filter:blur(10px);border:3px solid var(--ink);border-radius:999px;box-shadow:0 4px 0 var(--ink)}
.brand{display:flex;align-items:center;gap:8px;text-decoration:none;font-family:var(--font-d);font-size:20px;white-space:nowrap}
.nav{display:flex;gap:4px;margin-left:auto;overflow-x:auto;scrollbar-width:none}
.nav a{font-family:var(--font-d);font-size:17px;text-decoration:none;padding:6px 12px;border-radius:999px;white-space:nowrap}
.nav a:hover,.nav a.active{background:var(--ice);color:var(--ink)}
.lang-toggle{display:flex;gap:2px;background:#fff;border:3px solid var(--ink);border-radius:999px;padding:2px;flex:none}
.lang-toggle button{font-family:var(--font-d);font-size:15px;padding:4px 10px;border-radius:999px}
.lang-toggle button.on{background:var(--blue);color:#fff}
.sound-toggle{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:var(--purple);color:#fff;border:3px solid var(--ink);flex:none}
.sound-toggle[aria-pressed="false"]{background:#aaa}
.sound-toggle[aria-pressed="false"] .wave{opacity:0}

.btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-d);font-size:20px;padding:10px 22px;background:#fff;border:3px solid var(--ink);border-radius:999px;box-shadow:0 5px 0 var(--ink);text-decoration:none;transition:transform .12s,box-shadow .12s;color:var(--ink)}
.btn:hover{transform:translateY(-2px);box-shadow:0 7px 0 var(--ink)}
.btn:active{transform:translateY(4px);box-shadow:0 1px 0 var(--ink)}
.btn-big{font-size:26px;padding:14px 32px;background:var(--ice);color:var(--ink)}
.btn-ghost{background:rgba(255,255,255,.92)}
.btn-ice{background:#B8E4FF}.btn-water{background:#7EC8F5}.btn-steam{background:#E8F4FF}
.speak.talking{background:#A8F0C8}

.hero{position:relative;min-height:100svh;overflow:hidden;display:grid;place-items:end center}
.hero-scene{position:absolute;inset:0;z-index:0}
.sky{position:absolute;inset:0;background:linear-gradient(180deg,#1a4a7a 0%,#4a8bc2 40%,#a8d4f0 70%,#e8f4ff 100%)}
.snow-fall{position:absolute;inset:0;pointer-events:none;overflow:hidden;z-index:2}
.flake{position:absolute;top:-20px;color:#fff;opacity:.85;animation:fall linear infinite;text-shadow:0 0 6px rgba(255,255,255,.8)}
@keyframes fall{to{transform:translateY(110vh) rotate(360deg)}}
.l-hero{left:50%;bottom:8%;transform:translateX(-50%);width:min(52vw,420px);z-index:3}
.hero-girl{width:100%;filter:drop-shadow(0 20px 30px rgba(26,58,92,.35));border-radius:24px}
.bob{animation:bob 3.2s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.hero-copy{position:relative;z-index:5;text-align:center;padding:100px 20px 8vh;max-width:860px;background:linear-gradient(transparent,rgba(11,39,68,.55) 30%,rgba(11,39,68,.85))}
.hero-kicker{display:inline-block;font-family:var(--font-d);font-size:18px;color:var(--ink);background:rgba(255,255,255,.9);border:3px solid var(--ink);border-radius:999px;padding:2px 16px;margin-bottom:12px}
.title-3d{font-family:var(--font-d);font-weight:400;font-size:clamp(42px,9vw,96px);line-height:1.05;color:#B8E4FF;letter-spacing:.03em;-webkit-text-stroke:3px var(--ink);paint-order:stroke fill;
  text-shadow:0 2px 0 #5BA3D9,0 4px 0 #3A8FD6,0 6px 0 var(--ink),0 0 40px rgba(184,228,255,.5)}
.hero-sub{font-size:20px;margin:14px auto 10px;max-width:32em;font-weight:700;color:#fff;text-shadow:0 2px 8px rgba(0,0,0,.5)}
.disclaimer{font-size:13px;color:rgba(255,255,255,.85);max-width:36em;margin:0 auto 18px;line-height:1.45}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

.sec{position:relative;padding:clamp(56px,8vw,100px) clamp(16px,4vw,48px)}
.sec-head{text-align:center;max-width:760px;margin:0 auto 36px}
.sec-head h2{font-family:var(--font-d);font-weight:400;font-size:clamp(36px,5.5vw,56px);line-height:1.15;margin:12px 0 10px}
.sec-head p{font-size:18px;color:var(--ink-2)}
.sec-head.light h2{color:#fff}.sec-head.light p{color:#C5DDF0}
.chip{display:inline-block;font-family:var(--font-d);font-size:17px;padding:4px 16px;border-radius:999px;background:var(--ice);color:var(--ink);border:3px solid var(--ink)}
.chip-blue{background:#7EC8F5}.chip-pink{background:var(--pink)}.chip-purple{background:var(--purple);color:#fff}.chip-green{background:#A8F0C8}

.sec-facts{background:var(--cream)}
.cards{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:22px}
.card{height:360px;perspective:900px}
.card-in{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:transform .7s cubic-bezier(.3,1.4,.5,1)}
.card.flip .card-in{transform:rotateY(180deg)}
.face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border:4px solid var(--ink);border-radius:var(--r);box-shadow:0 8px 0 var(--ink);overflow:hidden;cursor:pointer}
.front{display:flex;flex-direction:column;background:var(--c)}
.front .pic{flex:1;display:grid;place-items:center;font-size:72px;background:radial-gradient(circle at 50% 55%,rgba(255,255,255,.45),transparent 65%)}
.front .nm{background:#fff;border-top:4px solid var(--ink);padding:12px 14px;display:flex;align-items:center;justify-content:space-between;gap:8px}
.front .nm b{font-family:var(--font-d);font-weight:400;font-size:26px;line-height:1.1}
.tag{font-size:13px;font-weight:700;padding:3px 10px;border-radius:999px;border:2px solid var(--ink);background:var(--sun);white-space:nowrap}
.back{transform:rotateY(180deg);background:#fff;padding:18px;display:flex;flex-direction:column;gap:8px}
.back h3{font-family:var(--font-d);font-weight:400;font-size:26px}
.back p{font-size:16px;line-height:1.55}
.back .sci{background:#E8F4FF;border-radius:14px;padding:10px 12px;font-size:14px}
.back .sci b{color:var(--blue)}
.mini{font-size:14px;font-weight:800;padding:6px 12px;border-radius:999px;border:3px solid var(--ink);background:var(--sun);display:inline-flex;align-items:center;gap:6px;margin-top:auto}

.sec-states{background:linear-gradient(#0B2744,#1a4a7a)}
.states-wrap{max-width:1050px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center}
.states-art img{border-radius:24px;border:4px solid var(--ice-2);box-shadow:0 10px 0 rgba(0,0,0,.35)}
.states-panel{text-align:center;color:#fff}
.beaker{margin-bottom:18px}
.beaker-glass{width:min(220px,70vw);height:220px;margin:0 auto;border:5px solid #fff;border-radius:20px 20px 40px 40px;background:rgba(255,255,255,.12);display:grid;place-items:center;position:relative;overflow:hidden}
.matter{font-size:80px;position:absolute;opacity:0;transform:scale(.5);transition:opacity .4s,transform .4s}
.beaker[data-state="ice"] .matter.ice,
.beaker[data-state="water"] .matter.water,
.beaker[data-state="steam"] .matter.steam{opacity:1;transform:scale(1)}
.beaker-label{margin-top:12px;font-family:var(--font-d);font-size:22px}
.state-btns{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:14px}

.sec-dress{background:linear-gradient(var(--cream),#E8D5FF)}
.dress-game{max-width:900px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:24px}
.kid-zone{min-height:280px;background:#fff;border:4px dashed var(--ink);border-radius:var(--r);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:16px;transition:background .2s,border-color .2s}
.kid-zone.over{background:#D6ECFF;border-color:var(--blue);border-style:solid}
.kid-figure{font-size:90px;line-height:1}
.kid-hint{font-size:15px;color:var(--ink-2);margin-top:6px}
.worn{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:10px;min-height:48px}
.clothes{display:flex;flex-wrap:wrap;gap:12px;align-content:flex-start}
.cloth{font-family:var(--font-d);font-size:18px;padding:12px 16px;border:3px solid var(--ink);border-radius:18px;background:#fff;box-shadow:0 4px 0 var(--ink);cursor:grab;user-select:none;touch-action:none}
.cloth.warm{background:#FFE08A}.cloth.thin{background:#FFD0D0}
.cloth.placed{opacity:.35;pointer-events:none}
.dress-score{text-align:center;margin:18px auto 10px;font-family:var(--font-d);font-size:22px;min-height:1.4em}
#dressReset{display:block;margin:0 auto}

.sec-flake{background:linear-gradient(#1a4a7a,#0B2744);color:#fff}
.flake-art{max-width:280px;margin:0 auto 20px}
.flake-art img{border-radius:50%;border:4px solid var(--ice-2)}
.mem-meta{text-align:center;margin-bottom:18px;font-family:var(--font-d);font-size:20px}
.mem-grid{max-width:520px;margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.mcard{aspect-ratio:1;perspective:600px;border:0;padding:0;background:transparent}
.mcard .in{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:transform .5s}
.mcard.open .in,.mcard.done .in{transform:rotateY(180deg)}
.mcard .f,.mcard .b{position:absolute;inset:0;backface-visibility:hidden;border:3px solid var(--ink);border-radius:16px;display:grid;place-items:center;font-size:clamp(28px,5vw,40px)}
.mcard .f{background:var(--ice-2)}
.mcard .b{transform:rotateY(180deg);background:#fff}
.mcard.done .b{background:#A8F0C8}

.sec-games{background:var(--cream)}
.breath-demo{max-width:900px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center}
.breath-stage{position:relative;height:260px;background:linear-gradient(#87CEEB,#E8F4FF);border:4px solid var(--ink);border-radius:var(--r);display:grid;place-items:center;overflow:hidden}
.kid-breathe{font-size:90px;z-index:2}
.puffs{position:absolute;inset:0;pointer-events:none}
.puff{position:absolute;left:55%;top:40%;width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.85);animation:puff .9s ease-out forwards}
@keyframes puff{to{transform:translate(80px,-40px) scale(2.2);opacity:0}}
.breath-card{background:#fff;border:4px solid var(--ink);border-radius:var(--r);padding:24px;box-shadow:0 8px 0 var(--ink)}
.breath-card h3{font-family:var(--font-d);font-size:28px;margin-bottom:8px}
.breath-card .btn{margin:8px 8px 0 0}

.foot{background:#0B2744;color:#C5DDF0;text-align:center;padding:28px 16px;font-size:14px}
.foot a{display:inline-block;margin-top:8px;font-family:var(--font-d);font-size:18px;color:#fff}
.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:#fff;padding:10px 22px;border-radius:999px;font-family:var(--font-d);opacity:0;pointer-events:none;transition:.3s;z-index:100}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

@media(max-width:800px){
  .nav{display:none}
  .states-wrap,.dress-game,.breath-demo{grid-template-columns:1fr}
  .mem-grid{grid-template-columns:repeat(3,1fr)}
  .title-3d{font-size:clamp(36px,11vw,64px)}
}