:root {
  --bg1: #6ee7ff;
  --bg2: #9b7cff;
  --ink: #15304a;
  --card: rgba(255,255,255,.82);
  --glass: rgba(255,255,255,.48);
  --pink: #ff6fb1;
  --yellow: #ffd75e;
  --green: #42df9a;
  --blue: #4aa8ff;
  --purple: #8d6bff;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; font-family: ui-rounded, "Nunito", "PingFang SC", system-ui, sans-serif; color: var(--ink); }
body {
  background: radial-gradient(circle at 20% 10%, #fff6ad 0 9%, transparent 22%), linear-gradient(135deg, var(--bg1), var(--bg2));
  overflow-x: hidden;
}
.start-overlay{position:fixed;inset:0;z-index:100;display:grid;place-items:center;padding:22px;background:radial-gradient(circle at 25% 18%,#fff6ad 0 12%,transparent 28%),linear-gradient(135deg,#6ee7ff,#9b7cff)}
.start-overlay.hidden{display:none}.start-card{width:min(560px,92vw);padding:30px;border-radius:34px;background:rgba(255,255,255,.88);border:4px solid rgba(255,255,255,.8);box-shadow:0 28px 80px rgba(41,32,110,.3);text-align:center;backdrop-filter:blur(14px)}.start-mascot{font-size:72px;filter:drop-shadow(0 14px 18px rgba(0,0,0,.16));animation:bob 2s ease-in-out infinite}.start-card h1{font-size:clamp(40px,7vw,72px);margin:6px 0}.start-card p{font-weight:850;line-height:1.55}.level-picker{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:16px 0 4px}.level-card{border:3px solid rgba(255,255,255,.9);border-radius:24px;padding:14px 10px;background:#fff;box-shadow:0 8px 0 #d8d2ff;color:#15304a;display:grid;gap:4px;place-items:center;cursor:pointer;font-weight:1000}.level-card span{font-size:38px}.level-card b{font-size:18px}.level-card small{font-size:12px;opacity:.72}.level-card.selected{background:linear-gradient(135deg,#fff6ad,#b6ffde);border-color:#42df9a;box-shadow:0 8px 0 #1daa70}.level-card:active{transform:translateY(5px);box-shadow:0 3px 0 #d8d2ff}.start-btn,.sound-btn{border:0;border-radius:24px;padding:18px 28px;margin-top:10px;background:linear-gradient(135deg,#42df9a,#ffd75e);box-shadow:0 10px 0 #1daa70;color:#15304a;font-size:20px;font-weight:1000;cursor:pointer}.sound-btn{display:block;width:100%;background:linear-gradient(135deg,#6ee7ff,#8d6bff);box-shadow:0 10px 0 #5f45d8}.start-btn:active,.sound-btn:active{transform:translateY(6px);box-shadow:0 4px 0 #1daa70}.start-tip{font-size:13px;opacity:.65}
.game-shell { min-height: 100vh; padding: 18px; display: grid; grid-template-columns: minmax(720px, 1fr) 310px; gap: 18px; }
.stage-card, .side-card { border: 3px solid rgba(255,255,255,.65); background: var(--card); box-shadow: 0 28px 70px rgba(41,32,110,.24); border-radius: 34px; backdrop-filter: blur(14px); }
.stage-card { padding: 18px; display: flex; flex-direction: column; gap: 14px; }
.topbar { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.eyebrow { margin: 0; color: #6a5cff; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; font-size: 12px; }
h1 { margin: 3px 0 0; font-size: clamp(24px, 3vw, 46px); line-height: .98; }
.stats { display: flex; gap: 10px; font-weight: 1000; }
.stats div { padding: 10px 14px; border-radius: 18px; background: #fff; box-shadow: inset 0 -4px #e8e3ff; }
.quest-panel { min-height: 96px; display: grid; grid-template-columns: 70px 1fr 58px; align-items: center; gap: 14px; padding: 12px 16px; background: linear-gradient(90deg, #fff, #fff3c9); border-radius: 26px; box-shadow: inset 0 -5px rgba(255,197,77,.35); }
.teacher { font-size: 50px; filter: drop-shadow(0 8px 10px rgba(0,0,0,.12)); animation: bob 2s ease-in-out infinite; }
.label { margin: 0; font-size: 12px; text-transform: uppercase; letter-spacing: .16em; font-weight: 1000; color: #ff7b00; }
h2 { margin: 2px 0; font-size: clamp(30px, 4.6vw, 60px); }
#hint { margin: 0; opacity: .72; font-weight: 700; }
.round-btn { width: 54px; height: 54px; border: 0; border-radius: 50%; background: var(--yellow); box-shadow: 0 8px 0 #e9a923; font-size: 24px; cursor: pointer; }
.world { position: relative; min-height: 430px; flex: 1; overflow: hidden; border-radius: 30px; background: linear-gradient(#8ee8ff 0 54%, #60df96 54% 100%); border: 4px solid #fff; }
.sun { position: absolute; width: 86px; height: 86px; left: 36px; top: 30px; background: #ffe66d; border-radius: 50%; box-shadow: 0 0 0 16px rgba(255,230,109,.28), 0 0 60px #fff3a3; }
.cloud { position: absolute; width: 130px; height: 44px; background: rgba(255,255,255,.88); border-radius: 999px; top: 54px; }
.cloud:before,.cloud:after { content:""; position:absolute; background:inherit; border-radius:50%; }
.cloud:before { width: 54px; height:54px; left:22px; top:-24px; }.cloud:after{width:70px;height:70px;right:18px;top:-36px}.c1{left:190px}.c2{right:110px;top:95px;transform:scale(.8)}
.mountain { position:absolute; bottom: 180px; width: 260px; height: 170px; background: linear-gradient(135deg,#5cb7ff,#7e72ff); clip-path: polygon(50% 0,100% 100%,0 100%); opacity:.85; }.m1{left:70px}.m2{right:120px; transform:scale(1.2)}
.river { position:absolute; left:-5%; right:-5%; bottom: 82px; height: 112px; background: linear-gradient(90deg,#39b8ff,#6ee7ff,#39b8ff); transform: skewY(-2deg); box-shadow: inset 0 10px rgba(255,255,255,.35); }
.phone-cam { position:absolute; top:18px; right:18px; width:150px; height:100px; border-radius:22px; background: rgba(22,40,70,.8); border:3px solid rgba(255,255,255,.85); overflow:hidden; box-shadow:0 10px 24px rgba(0,0,0,.18); }
#camera { width:100%; height:100%; object-fit:cover; opacity:.72; display:none; transform: scaleX(-1); }.cam-dot{position:absolute;top:10px;left:10px;width:10px;height:10px;border-radius:50%;background:#ff5252;z-index:2;box-shadow:0 0 14px #ff5252}.cam-label{position:absolute;left:0;right:0;bottom:0;padding:5px;text-align:center;color:#fff;font-size:11px;background:rgba(0,0,0,.35);font-weight:900}
.platforms { position:absolute; left:7%; right:7%; bottom:145px; display:grid; grid-template-columns:repeat(3,1fr); gap:6%; align-items:end; }
.platform { height:82px; border-radius:24px 24px 30px 30px; display:grid; place-items:center; color:#fff; font-size: clamp(25px,3.2vw,45px); font-weight:1000; text-shadow:0 4px rgba(0,0,0,.13); border:4px solid rgba(255,255,255,.86); box-shadow:0 14px 0 rgba(0,0,0,.12), inset 0 -10px rgba(0,0,0,.1); transition:.25s; }
.platform.active { transform: translateY(-16px) scale(1.04); box-shadow:0 22px 0 rgba(0,0,0,.10), 0 0 34px #fff; }
.avatar { position:absolute; left:50%; bottom:220px; width:84px; height:84px; margin-left:-42px; border-radius:50%; display:grid; place-items:center; font-size:56px; background:#fff; border:4px solid #fff4aa; box-shadow:0 18px 22px rgba(0,0,0,.16); transition: left .45s cubic-bezier(.2,1.5,.3,1), transform .25s; z-index:5; }
.avatar.jump { transform: translateY(-88px) rotate(-8deg) scale(1.08); }.avatar.wave { animation: wiggle .55s ease; }.avatar.squat { transform: scaleY(.72) translateY(18px); }
.treasure { position:absolute; right:7%; bottom:207px; font-size:58px; filter: drop-shadow(0 12px 14px rgba(0,0,0,.2)); animation: pulse 1.5s infinite; }
.spark { position:absolute; font-size:26px; animation: fly 900ms ease-out forwards; pointer-events:none; }
.bottom-area { display:grid; grid-template-columns:1fr 170px; gap:14px; align-items:stretch; }
.controls { display:grid; grid-template-columns:1.35fr .8fr repeat(5,1fr); gap:10px; }
.controls button, .primary, .secondary { border:0; border-radius:20px; padding:14px 10px; font-weight:1000; cursor:pointer; color:var(--ink); background:#fff; box-shadow:0 8px 0 #d8d2ff; font-size:16px; }
.motion-btn{background:linear-gradient(135deg,#42df9a,#6ee7ff)!important;box-shadow:0 8px 0 #1daa70!important}.sound-mini-btn{background:linear-gradient(135deg,#ffd75e,#ff9cc9)!important;box-shadow:0 8px 0 #e9a923!important}.controls button:active,.primary:active,.secondary:active,.round-btn:active{transform:translateY(5px);box-shadow:0 3px 0 #d8d2ff}.controls button:nth-child(3){background:var(--yellow)}.controls button:nth-child(5){background:#ff9cc9}.controls button:nth-child(6){background:#b6ffde}
.blindbox { position:relative; border-radius:24px; background:linear-gradient(135deg,#fff,#ffe8fb); padding:16px; display:grid; place-items:center; font-weight:1000; overflow:hidden; border:3px dashed #ff8ec8; }.box-lid{width:90px;height:18px;background:#ff6fb1;border-radius:14px 14px 6px 6px}.box-body{width:105px;height:54px;background:#8d6bff;color:#fff;border-radius:10px;display:grid;place-items:center}.reward{position:absolute;font-size:42px;transform:scale(0);transition:.45s}.blindbox.open .reward{transform:scale(1.3) rotate(8deg)}
.side-card { padding: 22px; align-self: stretch; }.side-card h3{font-size:28px;margin:0 0 14px}.side-card li{margin:10px 0;font-weight:750}.primary,.secondary{width:100%;margin-top:12px}.primary{background:#42df9a;box-shadow:0 8px 0 #1daa70}.secondary{background:#fff}.motion-status{margin:0;padding:12px 14px;border-radius:18px;background:#ecfff6;border:2px solid #42df9a;font-size:13px;line-height:1.45;font-weight:900}.motion-status.bad{background:#fff0f3;border-color:#ff6f91}.mobile-status{grid-column:1 / -1}.side-status{margin-top:14px}.note{font-size:13px;line-height:1.5;opacity:.68;font-weight:700}.toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%) translateY(120px);background:#17304d;color:#fff;padding:14px 20px;border-radius:999px;font-weight:1000;box-shadow:0 18px 45px rgba(0,0,0,.25);transition:.35s;z-index:20}.toast.show{transform:translateX(-50%) translateY(0)}
@keyframes bob{50%{transform:translateY(-8px)}}@keyframes wiggle{25%{transform:rotate(-10deg)}50%{transform:rotate(10deg)}75%{transform:rotate(-7deg)}}@keyframes pulse{50%{transform:scale(1.08)}}@keyframes fly{to{transform:translate(var(--x),-110px) rotate(40deg);opacity:0}} 
@media (max-width: 980px){.game-shell{grid-template-columns:1fr}.world{min-height:380px}.controls{grid-template-columns:1fr 1fr 1fr}.motion-btn{grid-column:1 / span 2;font-size:18px;padding:16px}.sound-mini-btn{grid-column:3 / 4;font-size:18px;padding:16px}.bottom-area{grid-template-columns:1fr}.blindbox{display:none}.phone-cam{width:120px;height:80px}.stats{font-size:13px;flex-wrap:wrap}.quest-panel{grid-template-columns:54px 1fr 50px}.teacher{font-size:42px}}
@media (hover: none) and (pointer: coarse){.side-card{display:none}}
@media (orientation: portrait) and (max-width: 760px){body:before{content:"建议横屏并投屏到电视，体验更好 ✨";position:fixed;inset:auto 14px 14px;z-index:50;background:#17304d;color:white;padding:12px 16px;border-radius:18px;text-align:center;font-weight:900}.game-shell{padding:10px}.stage-card{border-radius:22px;padding:12px}.world{min-height:330px}h2{font-size:32px}.platform{height:64px}.avatar{width:66px;height:66px;font-size:44px;bottom:195px}.treasure{bottom:184px;font-size:42px}}

/* Level 2: Monster Battle */
body.monster-level .world{background:linear-gradient(#34205f 0 50%,#6b3bb4 50% 58%,#2fd07f 58% 100%)}
body.monster-level .sun{background:#ff6f91;box-shadow:0 0 0 18px rgba(255,111,145,.22),0 0 70px #ffb1c5}
body.monster-level .mountain{background:linear-gradient(135deg,#34205f,#ff6f91)}
body.monster-level .river{background:linear-gradient(90deg,#ff9b37,#ffd75e,#ff6f91)}
body.monster-level .teacher{filter:drop-shadow(0 0 12px #ffd75e)}
body.monster-level .quest-panel{background:linear-gradient(90deg,#fff0f6,#ffe9b8)}
.boss-hud,.hero-hud{position:absolute;top:18px;left:22px;z-index:4;width:230px;padding:9px 12px;border-radius:18px;background:rgba(255,255,255,.84);border:3px solid rgba(255,255,255,.85);font-weight:1000;box-shadow:0 10px 22px rgba(0,0,0,.16)}
.hero-hud{top:78px}.hp{height:16px;border-radius:999px;background:#341a46;overflow:hidden;margin-top:5px;border:2px solid #fff}.hp i{display:block;height:100%;width:100%;background:linear-gradient(90deg,#ff4d8d,#ffd75e);transition:width .35s}.hp.hero i{background:linear-gradient(90deg,#42df9a,#6ee7ff)}
.monster{position:absolute;right:12%;bottom:210px;width:132px;height:132px;border-radius:44% 44% 48% 48%;display:grid;place-items:center;font-size:92px;background:radial-gradient(circle at 35% 25%,#ffdf6e,#ff6f91 45%,#6b3bb4);border:5px solid rgba(255,255,255,.85);box-shadow:0 24px 30px rgba(0,0,0,.28),0 0 40px rgba(255,111,145,.4);z-index:4;animation:monsterFloat 1.7s ease-in-out infinite}.monster.hit{animation:monsterHit .55s ease}.monster.attack{animation:monsterAttack .55s ease}.monster span{filter:drop-shadow(0 6px 8px rgba(0,0,0,.22))}
.magic-ball{position:absolute;left:43%;bottom:265px;z-index:6;font-size:34px;opacity:0;filter:drop-shadow(0 0 10px #fff)}.magic-ball.shoot{animation:magicShoot .6s ease-out forwards}.avatar.hurt{animation:heroHurt .45s ease}.battle-card{font-size:clamp(18px,2.4vw,34px);height:70px;background:linear-gradient(135deg,#8d6bff,#ff6fb1)!important}
@keyframes monsterFloat{50%{transform:translateY(-12px) rotate(2deg)}}
@keyframes monsterHit{25%{transform:translateX(18px) rotate(8deg) scale(.95);filter:brightness(1.4)}60%{transform:translateX(-10px) rotate(-5deg)}}
@keyframes monsterAttack{50%{transform:translateX(-56px) scale(1.12);filter:brightness(1.2)}}
@keyframes magicShoot{0%{opacity:1;transform:translate(0,0) scale(.7)}70%{opacity:1;transform:translate(280px,-32px) scale(1.5)}100%{opacity:0;transform:translate(330px,-40px) scale(.5)}}
@keyframes heroHurt{25%{transform:translateX(-16px) rotate(-7deg)}50%{transform:translateX(16px) rotate(7deg)}}
@media (max-width:980px){.boss-hud,.hero-hud{width:160px;font-size:12px;left:12px}.hero-hud{top:70px}.monster{right:8%;bottom:190px;width:94px;height:94px;font-size:66px}.magic-ball.shoot{animation:magicShootMobile .6s ease-out forwards}@keyframes magicShootMobile{0%{opacity:1;transform:translate(0,0) scale(.7)}70%{opacity:1;transform:translate(160px,-22px) scale(1.35)}100%{opacity:0;transform:translate(190px,-28px) scale(.5)}}}