:root{
  --paper:#F7F8FC;
  --grid:rgba(29,43,100,0.07);
  --ink:#1D2B64;
  --ink-deep:#131F4B;
  --yellow:#FFC93C;
  --yellow-soft:#FFF3D1;
  --redpen:#E4453A;
  --green:#1E9E6A;
  --green-soft:#E2F5EC;
  --white:#FFFFFF;
  --display:'Bricolage Grotesque',sans-serif;
  --body:'Plus Jakarta Sans',sans-serif;
  --hand:'Caveat',cursive;
  --vh100:100vh;
}
@supports(height:100svh){:root{--vh100:100svh}}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--body);color:var(--ink-deep);
  background:var(--paper);
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:26px 26px;
  line-height:1.55;overflow-x:hidden;
  text-wrap:balance;
}
::selection{background:var(--yellow)}
.hand{font-family:var(--hand);color:var(--redpen)}
.hl{position:relative;white-space:nowrap}
.hl::after{content:"";position:absolute;left:-2%;right:-2%;bottom:8%;height:36%;background:var(--yellow);z-index:-1;transform:rotate(-1deg);border-radius:3px}

/* ===== Mumu mascot ===== */
.mumu-wrap{display:flex;align-items:center;justify-content:center;gap:12px;margin:18px 0 6px}
.mumu{
  width:clamp(96px,20vw,140px);height:auto;
  filter:drop-shadow(0 10px 14px rgba(19,31,75,.18));
  animation:mumuFloat 3.6s ease-in-out infinite;
  transform-origin:center bottom;
}
@keyframes mumuFloat{
  0%,100%{transform:translateY(0) rotate(-2deg)}
  50%{transform:translateY(-9px) rotate(2deg)}
}
.mumu-wrap:hover .mumu{animation-duration:1.6s}
.bubble{
  position:relative;background:var(--white);border:2px solid var(--ink-deep);border-radius:14px;
  padding:10px 14px;font-family:var(--hand);font-size:clamp(19px,3.6vw,24px);color:var(--ink-deep);
  line-height:1.15;box-shadow:0 4px 0 rgba(19,31,75,.15);text-align:left;max-width:220px;
  transform:rotate(1deg);animation:bubblePop .5s .6s cubic-bezier(.3,1.5,.4,1) backwards;
}
.bubble small{display:block;font-size:.72em;color:#5a608a}
.bubble::before{
  content:"";position:absolute;left:-9px;top:50%;width:14px;height:14px;background:var(--white);
  border-left:2px solid var(--ink-deep);border-bottom:2px solid var(--ink-deep);
  transform:translateY(-50%) rotate(45deg);
}
@keyframes bubblePop{from{opacity:0;transform:scale(.5) rotate(-6deg)}to{opacity:1;transform:rotate(1deg)}}

/* ===== Teruskan next buttons ===== */
.next-btn{
  position:absolute;bottom:14px;left:50%;transform:translateX(-50%);z-index:9;
  display:inline-flex;align-items:center;gap:8px;
  background:var(--white);border:2px solid var(--ink-deep);border-radius:999px;
  padding:11px 22px;font-family:var(--body);font-weight:700;font-size:14.5px;color:var(--ink-deep);
  cursor:pointer;box-shadow:0 4px 0 rgba(19,31,75,.3);transition:box-shadow .12s;
  -webkit-tap-highlight-color:transparent;
}
.next-btn:hover{box-shadow:0 6px 0 rgba(19,31,75,.35)}
.next-btn:active{box-shadow:0 1px 0 rgba(19,31,75,.3)}
.next-btn .ar{display:inline-block;animation:arB 1.3s ease-in-out infinite;color:var(--redpen);font-weight:800}
@keyframes arB{0%,100%{transform:translateY(0)}50%{transform:translateY(4px)}}
.chapter .next-btn{background:var(--yellow);border-color:var(--yellow);box-shadow:0 4px 0 rgba(0,0,0,.4)}

/* ===== pencil progress bar ===== */
.pencil-bar{position:fixed;top:0;left:0;right:0;height:9px;z-index:100;pointer-events:none}
.pencil-line{height:100%;width:100%;background:linear-gradient(90deg,var(--redpen),var(--yellow));border-radius:0 5px 5px 0;position:relative;transform:translateX(-100%);will-change:transform}
.pencil-line::after{content:"✏️";position:absolute;right:-30px;top:-11px;font-size:40px;transform:rotate(180deg);filter:drop-shadow(0 2px 2px rgba(19,31,75,.25))}

/* ===== buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-family:var(--body);font-weight:700;font-size:17px;
  padding:16px 30px;border-radius:14px;cursor:pointer;text-decoration:none;
  border:2.5px solid var(--ink-deep);transition:transform .12s,box-shadow .12s;
}
.btn-primary{background:var(--yellow);color:var(--ink-deep);box-shadow:0 5px 0 var(--ink-deep)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 8px 0 var(--ink-deep)}
.btn-primary:active{transform:translateY(3px);box-shadow:0 1px 0 var(--ink-deep)}
.btn:focus-visible{outline:3px dashed var(--redpen);outline-offset:3px}

/* ===== scene scaffolding ===== */
.scene{position:relative}
.scene .pin{
  position:sticky;top:0;height:var(--vh100);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  overflow:hidden;padding:24px 24px 70px;
}
.s-tall{height:320vh}
.s-mid{height:260vh}
.kicker{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  background:var(--white);border:2px solid var(--ink-deep);border-radius:999px;padding:6px 14px;
  box-shadow:0 2px 0 var(--ink-deep);
}
h1,h2{font-family:var(--display);font-weight:800;letter-spacing:-.02em;line-height:1.08}

/* ===== HERO ===== */
.hero{min-height:var(--vh100);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:28px 24px 96px;position:relative}
.hero h1{font-size:clamp(34px,7.6vw,72px);margin:14px 0 12px}
.hero h1 .w{display:inline-block;opacity:0;transform:translateY(30px) rotate(2deg);animation:wordIn .7s cubic-bezier(.2,.8,.2,1) forwards}
@keyframes wordIn{to{opacity:1;transform:none}}
.hero p{font-size:clamp(16px,2.6vw,20px);color:#39406b;max-width:34em}
.hero .name-tag{
  font-family:var(--hand);font-size:clamp(22px,4vw,30px);color:var(--redpen);
  transform:rotate(-2deg);margin-top:16px;display:inline-block;
}
.scroll-cue{
  position:absolute;bottom:26px;left:50%;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:6px;font-size:13px;font-weight:700;color:var(--ink);
}
.scroll-cue .mouse{
  width:26px;height:42px;border:2.5px solid var(--ink-deep);border-radius:14px;position:relative;background:var(--white);
}
.scroll-cue .mouse::after{
  content:"";position:absolute;left:50%;top:7px;width:4px;height:8px;margin-left:-2px;
  background:var(--redpen);border-radius:2px;animation:wheel 1.4s infinite;
}
@keyframes wheel{0%{transform:translateY(0);opacity:1}70%{transform:translateY(12px);opacity:0}100%{opacity:0}}

/* ===== SCENE 1: STRUGGLE ===== */
.workbook{
  width:min(92vw,460px);background:var(--white);border:2.5px solid var(--ink-deep);border-radius:18px;
  box-shadow:10px 12px 0 rgba(19,31,75,.13);padding:22px 24px;position:relative;
  background-image:repeating-linear-gradient(transparent,transparent 35px,rgba(29,43,100,.12) 36px);
}
.workbook .wb-head{display:flex;justify-content:space-between;font-size:12px;font-weight:700;color:#5a608a;border-bottom:2px solid var(--ink-deep);padding-bottom:8px;margin-bottom:14px}
.wb-row{display:flex;justify-content:space-between;align-items:center;font-size:16px;padding:7px 2px;font-weight:600}
.wb-row .q{color:#39406b}
.wb-row .mark{font-family:var(--hand);font-size:30px;font-weight:700;color:var(--redpen);opacity:0;transform:scale(2) rotate(-14deg)}
.wb-grade{
  position:absolute;right:-14px;bottom:-18px;font-family:var(--hand);font-size:44px;color:var(--redpen);
  border:3px solid var(--redpen);border-radius:50%;width:86px;height:86px;display:flex;align-items:center;justify-content:center;
  background:var(--white);transform:rotate(10deg) scale(0);box-shadow:5px 6px 0 rgba(19,31,75,.15);
}
.s1-cap{max-width:520px;text-align:center;margin-top:34px}
.s1-cap .line{font-size:clamp(17px,3.4vw,22px);font-weight:600;opacity:0;transform:translateY(16px);margin-top:8px}
.s1-cap .line strong{color:var(--redpen)}
.s1-title{text-align:center;margin-bottom:26px}
.s1-title h2{font-size:clamp(26px,5.4vw,42px);margin-top:12px}

/* ===== SCENE 2: DISCOVERY (chapter break) ===== */
.chapter{
  min-height:var(--vh100);display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;padding:80px 24px;position:relative;
  background:var(--ink-deep);color:#fff;
}
.chapter .kicker{background:var(--yellow);border-color:var(--yellow);color:var(--ink-deep);box-shadow:none}
.chapter h2{font-size:clamp(32px,7vw,60px);max-width:14em;margin:20px 0 14px;color:#fff}
.chapter h2 em{font-style:normal;color:var(--yellow)}
.chapter p{color:#c6cbe8;font-size:clamp(16px,2.4vw,19px);max-width:32em}
.chapter .reveal-item{opacity:0;transform:translateY(30px);transition:opacity .8s ease,transform .8s cubic-bezier(.2,.8,.2,1)}
.chapter.on .reveal-item{opacity:1;transform:none}
.chapter .reveal-item:nth-child(2){transition-delay:.12s}
.chapter .reveal-item:nth-child(3){transition-delay:.24s}
.chapter .big-tick{
  font-family:var(--hand);font-size:clamp(70px,14vw,120px);color:var(--green);line-height:1;
  transform:scale(0) rotate(-12deg);transition:transform .6s cubic-bezier(.3,1.6,.4,1) .35s;
}
.chapter.on .big-tick{transform:scale(1) rotate(-6deg)}

/* ===== SCENE 3: THE GAME (phone scrub) ===== */
.phone{
  width:min(84vw,340px);aspect-ratio:9/17.5;background:var(--ink-deep);border-radius:38px;
  padding:10px;box-shadow:0 18px 50px rgba(19,31,75,.3);position:relative;
}
@media(max-height:760px){.phone{width:min(70vw,280px)}.s3-head h2{font-size:clamp(20px,4.4vw,30px)}}
.phone .notch{position:absolute;top:18px;left:50%;transform:translateX(-50%);width:90px;height:22px;background:var(--ink-deep);border-radius:12px;z-index:3}
.screen{
  width:100%;height:100%;background:var(--paper);border-radius:30px;overflow:hidden;position:relative;
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:20px 20px;
}
.app-bar{display:flex;justify-content:space-between;align-items:center;padding:34px 16px 8px;font-size:12px;font-weight:700}
.app-bar .flame{color:var(--redpen)}
.app-bar .xp-pill{background:var(--yellow);border:2px solid var(--ink-deep);border-radius:999px;padding:2px 10px}
.beat{position:absolute;inset:70px 14px 14px;display:flex;flex-direction:column;justify-content:center;gap:10px;opacity:0;transform:translateY(24px)}
.qcard{background:var(--white);border:2px solid var(--ink-deep);border-radius:14px;padding:14px;box-shadow:0 3px 0 rgba(19,31,75,.15)}
.qcard .qq{font-family:var(--display);font-weight:700;font-size:16px;margin-bottom:10px}
.qopt{display:flex;justify-content:space-between;font-size:14px;font-weight:600;border:2px solid rgba(19,31,75,.22);border-radius:10px;padding:9px 12px;margin-top:7px;background:var(--paper)}
.qopt.right{background:var(--green-soft);border-color:var(--green);color:var(--green)}
.qopt.wrongo{background:#FDECEA;border-color:var(--redpen);color:var(--redpen)}
.ai-strip{
  font-size:12.5px;font-weight:700;background:var(--yellow-soft);border:2px dashed var(--yellow);
  border-radius:10px;padding:8px 10px;display:flex;gap:8px;align-items:center;
}
.streak-stage{text-align:center}
.streak-stage .flame-big{font-size:84px;line-height:1;display:inline-block;transform-origin:bottom center}
.streak-stage .count{font-family:var(--display);font-weight:800;font-size:46px}
.streak-stage .lbl{font-weight:700;color:#5a608a;font-size:13px;letter-spacing:.08em;text-transform:uppercase}
.week{display:flex;justify-content:center;gap:6px;margin-top:12px}
.day{width:30px;height:30px;border-radius:50%;border:2px solid rgba(19,31,75,.25);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;background:var(--white)}
.day.lit{background:var(--yellow);border-color:var(--ink-deep)}
.lboard{background:var(--white);border:2px solid var(--ink-deep);border-radius:14px;padding:12px;box-shadow:0 3px 0 rgba(19,31,75,.15)}
.lb-title{font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#5a608a;margin-bottom:8px}
.lb-row{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:600;padding:7px 8px;border-radius:9px}
.lb-row.me{background:var(--yellow-soft);border:2px solid var(--yellow);font-weight:700}
.lb-row .pos{width:20px;font-family:var(--display);font-weight:800}
.lb-row .pts{margin-left:auto;color:#5a608a;font-size:12.5px}
.s3-side{position:absolute;left:0;right:0;bottom:70px;text-align:center;padding:0 20px;z-index:5}
.s3-side .cap{
  display:inline-block;background:var(--white);border:2px solid var(--ink-deep);border-radius:12px;
  padding:10px 16px;font-size:clamp(14px,2.6vw,16px);font-weight:600;box-shadow:0 4px 0 rgba(19,31,75,.15);
  max-width:520px;opacity:0;transform:translateY(14px);
}
.s3-head{text-align:center;margin-top:clamp(24px,6vh,64px);margin-bottom:18px;z-index:5}
.s3-head h2{font-size:clamp(24px,5vw,38px);margin-top:10px}

/* ===== SCENE 4: PROGRESS ===== */
.report{
  width:min(92vw,480px);background:var(--white);border:2.5px solid var(--ink-deep);border-radius:20px;
  box-shadow:10px 12px 0 rgba(19,31,75,.13);padding:24px;
}
.report .rp-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.report .rp-head h3{font-family:var(--display);font-size:18px}
.report .rp-head .wk{font-size:12px;font-weight:700;color:#5a608a}
.tr{margin-bottom:14px}
.tr .tr-lbl{display:flex;justify-content:space-between;font-size:14px;font-weight:700;margin-bottom:5px}
.tr .tr-lbl .pct{font-family:var(--display)}
.track{height:14px;background:var(--paper);border:2px solid rgba(19,31,75,.25);border-radius:99px;overflow:hidden}
.fill{height:100%;width:100%;border-radius:99px;background:var(--green);transform:scaleX(0);transform-origin:left center}
.tr.warn .fill{background:var(--redpen)}
.tr .chip{font-family:var(--hand);font-size:19px;color:var(--green);opacity:0}
.price-flip{text-align:center;margin-top:30px}
.price-flip .old{font-family:var(--display);font-weight:700;font-size:clamp(22px,4.6vw,30px);color:#8388ad;position:relative;display:inline-block}
.price-flip .old .strike{position:absolute;left:-4%;top:52%;height:4px;width:108%;background:var(--redpen);border-radius:2px;transform:rotate(-4deg) scaleX(0);transform-origin:left center;will-change:transform}
.price-flip .new{font-family:var(--display);font-weight:800;font-size:clamp(40px,9vw,64px);color:var(--ink-deep);display:block}
.price-flip .new small{font-size:.38em;font-weight:700;color:#5a608a}
.price-flip .tag{font-family:var(--hand);font-size:clamp(20px,3.6vw,26px);color:var(--redpen);transform:rotate(-2deg);display:inline-block}
.s4-head{text-align:center;margin-bottom:24px}
.s4-head h2{font-size:clamp(24px,5.2vw,40px);margin-top:10px}

/* ===== FINAL: ACTION ===== */
.final{min-height:var(--vh100);padding:90px 20px 110px;display:flex;flex-direction:column;align-items:center}
.final .sec-head{text-align:center;max-width:640px;margin-bottom:34px}
.final h2{font-size:clamp(30px,6.4vw,48px);margin:14px 0 10px}
.final .sec-head p{color:#39406b;font-size:17px}
.perk-strip{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;max-width:720px;margin-bottom:38px}
.pill{
  background:var(--white);border:2px solid var(--ink-deep);border-radius:999px;padding:10px 18px;
  font-size:14.5px;font-weight:700;box-shadow:0 3px 0 rgba(19,31,75,.18);
  transition:transform .15s;
}
.pill:hover{transform:translateY(-4px) rotate(-1deg)}
.pill .st{color:var(--redpen)}
.form-shell{
  width:min(94vw,620px);background:var(--white);border:2.5px solid var(--ink-deep);border-radius:24px;
  box-shadow:12px 14px 0 rgba(19,31,75,.14);padding:clamp(26px,5vw,44px);position:relative;
}
.form-shell .stamp{
  position:absolute;top:-18px;right:22px;background:var(--redpen);color:#fff;font-family:var(--hand);
  font-size:20px;padding:5px 16px;border-radius:8px;transform:rotate(4deg);border:2px solid var(--ink-deep);
}
.form-shell h3{font-family:var(--display);font-size:clamp(22px,4vw,28px);margin-bottom:6px}
.form-shell .sub{color:#39406b;font-size:15.5px;margin-bottom:24px}
.field{margin-bottom:16px}
.field label{display:block;font-weight:700;font-size:14px;margin-bottom:6px}
.field input,.field select{
  width:100%;font-family:var(--body);font-size:16px;color:var(--ink-deep);
  background:var(--paper);border:2px solid rgba(19,31,75,.3);border-radius:12px;padding:14px 16px;
  transition:border-color .15s,box-shadow .15s;
}
.field input:focus,.field select:focus{outline:none;border-color:var(--ink-deep);box-shadow:0 0 0 3px rgba(255,201,60,.5)}
.form-shell .btn{width:100%;margin-top:4px;font-size:18px;padding:17px}
.tiny{font-size:12px;color:#8388ad;text-align:center;margin-top:12px}
.err{color:var(--redpen);font-size:13px;margin-top:4px;display:none;font-weight:600}
.success{display:none;text-align:center;padding:22px 4px}
.success.show{display:block;animation:fadeUp .5s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.success .big{font-family:var(--hand);font-size:70px;color:var(--green);line-height:1}
.success h4{font-family:var(--display);font-size:24px;margin:10px 0 6px}
.success p{color:#39406b;font-size:15.5px}

footer{border-top:2px solid var(--ink-deep);padding:30px 20px 100px;text-align:center;font-size:13.5px;color:#5a608a}
footer .lg{font-family:var(--display);font-weight:800;font-size:20px;color:var(--ink-deep);margin-bottom:6px}

/* sticky CTA */
.sticky-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:90;
  padding:10px 14px calc(10px + env(safe-area-inset-bottom));
  background:rgba(247,248,252,.97);border-top:2px solid var(--ink-deep);
  transform:translateY(110%);transition:transform .35s cubic-bezier(.2,.8,.2,1);
}
.sticky-cta.show{transform:none}
.sticky-cta .btn{width:100%;padding:14px;font-size:16px}

/* performance: promote scroll-animated elements to their own layers */
.wb-row .mark,.wb-grade,.s1-cap .line,.beat,.s3-side .cap,.fill,.chapter .reveal-item,.chapter .big-tick{will-change:transform,opacity}
.screen,.workbook,.report{transform:translateZ(0)}

/* reduced motion: show everything statically */
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
  .s-tall,.s-mid{height:auto}
  .scene .pin{position:static;height:auto;padding:70px 24px}
  .wb-row .mark,.s1-cap .line,.s3-side .cap,.tr .chip,.beat{opacity:1!important;transform:none!important}
  .wb-grade{transform:rotate(10deg) scale(1)!important}
  .beat{position:static;margin-bottom:16px}
  .screen{height:auto;min-height:520px}
  .fill{transform:scaleX(.8)!important}
  .hero h1 .w{opacity:1;transform:none}
  .chapter .reveal-item{opacity:1;transform:none}
  .chapter .big-tick{transform:none}
  .price-flip .old .strike{transform:rotate(-4deg) scaleX(1)!important}
  .sticky-cta{transform:none}
  .pencil-line{transform:none!important}
}

/* Chinese page (zh.html has <html lang="zh">): add CJK fallbacks to the font stacks */
html[lang="zh"]{
  --display:'Bricolage Grotesque','Noto Sans SC',sans-serif;
  --body:'Plus Jakarta Sans','Noto Sans SC',sans-serif;
  --hand:'Caveat','Ma Shan Zheng',cursive;
}