:root{
  --paper:#F3F0E9;
  --paper-2:#E9E5DB;
  --card:#FBF9F3;
  --ink:#16181D;
  --ink-2:#3B3C40;
  --muted:#7D776B;
  --line:rgba(22,24,29,.13);
  --line-2:rgba(22,24,29,.28);
  --accent:#D8472B;
  --accent-soft:#F3DDD6;
  --blue:#2E4A7D;
  --gold:#B58B2A;
  --ok:#2F6B4F;
  --bad:#B3352A;
  --sans:"PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --serif:"Songti SC","Noto Serif SC","Source Han Serif SC","SimSun",serif;
  --num:"Inter","Helvetica Neue",Arial,sans-serif;
  --r:6px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%}
body{
  margin:0;
  width:100%;
  font-family:var(--sans);
  color:var(--ink);
  background:
    radial-gradient(circle at 20% 0%, rgba(216,71,43,.08), transparent 40%),
    radial-gradient(circle at 100% 100%, rgba(46,74,125,.10), transparent 45%),
    #DCD7CC;
  overscroll-behavior:none;
}
button,input,textarea,select{font:inherit;color:inherit}
button{border:0;background:none;cursor:pointer}
a{color:inherit;text-decoration:none}
ul{margin:0;padding:0;list-style:none}

#app{
  position:relative;
  width:100%;
  margin:0 auto;
  max-width:460px;
  min-height:100dvh;
  background:var(--paper);
  overflow:hidden;
  box-shadow:0 0 0 1px rgba(0,0,0,.05), 0 40px 90px rgba(0,0,0,.18);
}
@media (min-width:760px){
  #app{min-height:min(920px, calc(100dvh - 40px));height:min(920px, calc(100dvh - 40px));margin:20px 0;border-radius:24px}
}

/* ---------- shell ---------- */
.screen{min-height:100dvh;display:flex;flex-direction:column;padding-top:env(safe-area-inset-top)}
@media (min-width:760px){.screen{min-height:100%}}
.scroll{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch;padding:0 22px 28px;scrollbar-width:none}
.scroll::-webkit-scrollbar{display:none}

.topbar{
  display:flex;align-items:center;gap:10px;
  padding:14px 22px 12px;
  border-bottom:1px solid var(--line);
  background:rgba(243,240,233,.9);
  backdrop-filter:blur(10px);
  position:relative;z-index:20;
}
.brand{display:flex;align-items:center;gap:9px;font-weight:700;letter-spacing:.02em}
.brand .mark{
  width:26px;height:26px;display:grid;place-items:center;
  background:var(--accent);color:#fff;font-family:var(--serif);font-size:16px;line-height:1;
  border-radius:3px;transform:rotate(-3deg);
}
.brand small{display:block;font-size:10px;font-weight:500;color:var(--muted);letter-spacing:.18em;margin-top:1px}
.spacer{flex:1}
.top-user{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:8px}
.avatar-dot{width:26px;height:26px;border-radius:50%;background:var(--blue);color:#fff;display:grid;place-items:center;font-size:11px;font-weight:700}
.icon-btn{width:34px;height:34px;border:1px solid var(--line);border-radius:50%;display:grid;place-items:center;color:var(--ink-2);background:var(--card);font-size:14px}

/* ---------- login ---------- */
.login{min-height:100dvh;display:flex;flex-direction:column;padding:calc(26px + env(safe-area-inset-top)) 26px calc(26px + env(safe-area-inset-bottom));background:linear-gradient(160deg,#F7F4EC 0%,#F1EDE3 60%,#EBE6DA 100%)}
@media (min-width:760px){.login{min-height:100%}}
.login-head{display:flex;justify-content:space-between;align-items:flex-start}
.login-kicker{font-size:11px;letter-spacing:.24em;color:var(--muted);text-transform:uppercase}
.login-title{font-family:var(--serif);font-size:58px;line-height:1.02;margin:26px 0 0;letter-spacing:.02em;font-weight:700}
.login-title em{font-style:normal;color:var(--accent)}
.login-sub{color:var(--muted);font-size:13px;line-height:1.8;margin:14px 0 0;max-width:280px}
.rule{height:1px;background:var(--line-2);margin:26px 0 22px}
.role-switch{display:flex;gap:6px;margin-bottom:24px}
.role-switch button{flex:1;padding:10px 0;border:1px solid var(--line);border-radius:3px;font-size:13px;color:var(--muted);background:transparent;transition:.2s}
.role-switch button.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.field{margin-bottom:20px}
.field label{display:block;font-size:11px;letter-spacing:.16em;color:var(--muted);margin-bottom:7px}
.field input{width:100%;border:0;border-bottom:1px solid var(--line-2);background:transparent;padding:9px 0 10px;font-size:19px;font-family:var(--num);letter-spacing:.06em;outline:none;border-radius:0}
.field input:focus{border-color:var(--accent)}
.field input::placeholder{color:#B9B3A6;font-size:15px;letter-spacing:.02em}
.btn{
  width:100%;min-height:54px;padding:0 18px;border-radius:3px;
  background:var(--ink);color:#fff;font-weight:600;font-size:15px;letter-spacing:.08em;
  display:flex;align-items:center;justify-content:center;gap:10px;
  transition:transform .15s ease,opacity .2s;
}
.btn:active{transform:scale(.985)}
.btn[disabled]{opacity:.45}
.btn.accent{background:var(--accent)}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line-2)}
.btn.small{min-height:38px;font-size:12px;padding:0 12px;letter-spacing:.04em;width:auto}
.login-foot{margin-top:auto;padding-top:26px;font-size:11px;color:var(--muted);line-height:1.9}
.demo-box{border:1px dashed var(--line-2);padding:11px 13px;border-radius:4px;margin-top:14px;font-size:11px;color:var(--muted);line-height:1.8;background:rgba(255,255,255,.35)}
.demo-box b{color:var(--ink);font-family:var(--num);letter-spacing:.03em}

/* ---------- map ---------- */
.hero{padding:26px 0 18px;border-bottom:1px solid var(--line-2)}
.hero-top{display:flex;align-items:flex-end;justify-content:space-between;gap:12px}.hero-top>div:first-child{min-width:0}
.hero h1{font-family:var(--serif);font-size:30px;line-height:1.15;margin:0;font-weight:700}
.hero p{margin:8px 0 0;color:var(--muted);font-size:12px;line-height:1.7}
.big-num{flex:none;padding-right:10px;font-family:var(--num);font-size:36px;line-height:.9;letter-spacing:-.04em;font-weight:600;white-space:nowrap}
.big-num small{font-size:14px;color:var(--muted);letter-spacing:0;font-weight:500}
.bar{height:3px;background:var(--line);margin-top:18px;overflow:hidden}
.bar i{display:block;height:100%;background:var(--accent);transition:width .6s cubic-bezier(.2,.8,.2,1)}
.tabs{display:flex;gap:0;border-bottom:1px solid var(--line);margin:0 -22px;padding:0 22px;position:sticky;top:0;background:var(--paper);z-index:10}
.tabs button{flex:1;padding:15px 0 13px;font-size:13px;color:var(--muted);border-bottom:2px solid transparent;margin-bottom:-1px;letter-spacing:.04em}
.tabs button.on{color:var(--ink);border-color:var(--accent);font-weight:600}
.vol{margin-top:26px}
.vol-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:4px}
.vol-head h3{font-size:11px;letter-spacing:.16em;color:var(--muted);font-weight:600;margin:0;text-transform:uppercase}
.vol-head span{font-size:10px;color:#A9A294;font-family:var(--num)}
.lesson{
  display:grid;grid-template-columns:44px 1fr auto;gap:12px;align-items:center;
  padding:15px 0;border-bottom:1px solid var(--line);text-align:left;width:100%;
  transition:opacity .2s;
}
.lesson:active{opacity:.6}
.lesson .no{font-family:var(--num);font-size:12px;color:var(--muted);letter-spacing:.04em;padding-top:2px}
.lesson .tt{display:block;font-size:16px;font-weight:600;line-height:1.35}
.lesson .tg{display:block;font-size:11px;color:var(--muted);margin-top:4px;line-height:1.4}
.lesson .st{display:flex;flex-direction:column;align-items:flex-end;gap:4px}
.lesson .st .sc{font-family:var(--num);font-size:10px;color:var(--muted)}
.lesson.locked{opacity:.42}
.lesson.done .tt::after{content:" ✓";color:var(--ok);font-size:12px}
.lock-ico{width:22px;height:22px;border:1px solid var(--line-2);border-radius:50%;display:grid;place-items:center;font-size:10px;color:var(--muted)}
.go{font-size:16px;color:var(--muted)}

/* ---------- lesson stage ---------- */
.lesson-screen{height:100dvh;display:flex;flex-direction:column;overflow:hidden;background:var(--paper)}
@media (min-width:760px){.lesson-screen{height:100%}}
.lesson-top{display:flex;align-items:center;gap:12px;padding:calc(12px + env(safe-area-inset-top)) 20px 10px;border-bottom:1px solid var(--line)}
.lesson-top .mid{flex:1;min-width:0}
.lesson-top .k{font-size:10px;letter-spacing:.14em;color:var(--muted)}
.lesson-top .t{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:2px}
.dots{display:flex;gap:4px;margin-top:7px}
.dots i{height:2px;flex:1;background:var(--line);transition:.3s}
.dots i.on{background:var(--ink)}
.dots i.done{background:var(--accent)}
.stage{flex:1;position:relative;overflow:hidden;display:flex;flex-direction:column}
.scene{flex:1;display:flex;flex-direction:column;padding:22px 24px 12px;animation:sceneIn .42s cubic-bezier(.2,.8,.2,1) both;position:relative;overflow:hidden}
@keyframes sceneIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}

.cover{justify-content:center;padding-bottom:60px}
.cover .kick{font-size:11px;letter-spacing:.22em;color:var(--accent);font-weight:600}
.cover h2{font-family:var(--serif);font-size:46px;line-height:1.08;margin:18px 0 12px;font-weight:700;letter-spacing:.01em}
.cover .sub{font-size:14px;color:var(--ink-2);line-height:1.7}
.cover .meta{margin-top:22px;font-family:var(--num);font-size:11px;color:var(--muted);letter-spacing:.06em}
.cover .line{width:44px;height:3px;background:var(--accent);margin:24px 0 0}

.board-phrase{
  background:var(--card);border:1px solid var(--line);border-left:4px solid var(--accent);
  padding:20px 18px;font-family:var(--serif);font-size:27px;line-height:1.4;font-weight:700;
  box-shadow:0 12px 30px rgba(22,24,29,.05);border-radius:2px;
}
.board-phrase.small{font-size:22px}
.speech{
  margin-top:20px;font-size:17px;line-height:1.85;color:var(--ink-2);
  letter-spacing:.01em;position:relative;padding-right:8px;
}
.speech::before{content:"“";font-family:var(--serif);font-size:46px;line-height:0;color:var(--accent);position:relative;top:12px;margin-right:2px}
.char{position:absolute;right:2px;bottom:0;width:48%;max-width:210px;pointer-events:none;filter:drop-shadow(0 18px 20px rgba(22,24,29,.08))}
.char.small{width:34%;right:-10px;bottom:-24px;opacity:.96}
.scene.say{padding-bottom:140px}
.scene.say::after{content:'';position:absolute;left:24px;bottom:120px;width:84px;height:84px;border:1px solid rgba(22,24,29,.13);border-radius:50%}
.scene.say::before{content:'';position:absolute;left:66px;bottom:60px;width:1px;height:60px;background:rgba(22,24,29,.10)}

.board-title{font-size:11px;letter-spacing:.18em;color:var(--muted);font-weight:600;margin-bottom:18px;text-transform:uppercase}
.board-item{display:grid;grid-template-columns:34px 1fr;gap:10px;padding:15px 0;border-top:1px solid var(--line)}
.board-item .k{font-family:var(--num);font-size:11px;color:var(--accent);padding-top:3px;letter-spacing:.02em}
.board-item .t{font-size:17px;line-height:1.5;font-weight:600}
.board-item .d{font-size:12px;color:var(--muted);margin-top:4px;line-height:1.6}

.quote{justify-content:center;align-items:flex-start;padding-bottom:70px}
.quote .mark{font-family:var(--serif);font-size:68px;line-height:.6;color:var(--accent);opacity:.9}
.quote blockquote{font-family:var(--serif);font-size:31px;line-height:1.5;margin:14px 0 0;font-weight:700}
.quote .note{margin-top:22px;color:var(--muted);font-size:12px;line-height:1.8;border-top:1px solid var(--line);padding-top:14px;max-width:88%}

.recap{justify-content:center;padding-bottom:60px}
.recap .card{background:var(--ink);color:#F7F4EC;padding:28px 24px;border-radius:3px;position:relative;overflow:hidden}
.recap .card::after{content:"";position:absolute;right:-40px;bottom:-40px;width:140px;height:140px;border:1px solid rgba(255,255,255,.15);border-radius:50%}
.recap .kick{font-size:10px;letter-spacing:.2em;color:#D9B7A8}
.recap .txt{font-family:var(--serif);font-size:24px;line-height:1.6;margin-top:14px;font-weight:700}
.recap .note{font-size:11px;color:rgba(255,255,255,.55);margin-top:18px;line-height:1.7}

.end{justify-content:center;align-items:center;text-align:center;padding-bottom:60px}
.end .ring{width:96px;height:96px;border:2px solid var(--accent);border-radius:50%;display:grid;place-items:center;font-family:var(--num);font-size:30px;color:var(--accent);margin-bottom:26px}
.end h2{font-family:var(--serif);font-size:36px;margin:0;font-weight:700}
.end p{color:var(--muted);font-size:13px;line-height:1.8;margin:12px 0 0}

.lesson-foot{padding:12px 22px calc(16px + env(safe-area-inset-bottom));border-top:1px solid var(--line);background:var(--paper);display:flex;gap:10px;align-items:center}
.lesson-foot .count{font-family:var(--num);font-size:11px;color:var(--muted);white-space:nowrap;letter-spacing:.04em}
.lesson-foot .btn{flex:1}

/* ---------- quiz ---------- */
.quiz{padding:26px 24px 10px;display:flex;flex-direction:column;gap:18px;flex:1;overflow-y:auto}
.q-kicker{font-size:10px;letter-spacing:.2em;color:var(--accent);font-weight:600}
.q-title{font-size:21px;line-height:1.6;font-weight:600;letter-spacing:.01em;margin:2px 0 6px}
.q-options{display:flex;flex-direction:column;gap:9px;margin-top:4px}
.option{
  display:grid;grid-template-columns:30px 1fr;gap:10px;align-items:center;text-align:left;
  padding:14px 14px;border:1px solid var(--line-2);border-radius:4px;background:var(--card);
  font-size:14px;line-height:1.55;transition:.18s;
}
.option .l{font-family:var(--num);font-size:11px;color:var(--muted);border:1px solid var(--line);width:22px;height:22px;display:grid;place-items:center;border-radius:50%}
.option.correct{border-color:var(--ok);background:#EDF4EF}
.option.correct .l{background:var(--ok);color:#fff;border-color:var(--ok)}
.option.wrong{border-color:var(--bad);background:#F8E9E6}
.option.wrong .l{background:var(--bad);color:#fff;border-color:var(--bad)}
.option[disabled]{cursor:default}
.feedback{border-left:3px solid var(--accent);background:var(--card);padding:14px 16px;font-size:13px;line-height:1.8;color:var(--ink-2);animation:sceneIn .3s ease both}
.feedback.ok{border-color:var(--ok)}
.feedback b{display:block;font-size:11px;letter-spacing:.12em;margin-bottom:5px;color:var(--accent)}
.feedback.ok b{color:var(--ok)}

/* ---------- result ---------- */
.result{flex:1;display:flex;flex-direction:column;padding:26px 24px;overflow-y:auto}
.result-hero{display:flex;align-items:center;gap:20px;padding:10px 0 26px;border-bottom:1px solid var(--line-2)}
.stamp{width:104px;height:104px;border:2px solid var(--accent);border-radius:50%;display:grid;place-items:center;color:var(--accent);position:relative;flex:none;transform:rotate(-6deg)}
.stamp b{font-family:var(--serif);font-size:30px;line-height:1}
.stamp i{position:absolute;bottom:20px;font-style:normal;font-size:9px;letter-spacing:.2em}
.result-hero h2{font-family:var(--serif);font-size:29px;margin:0 0 6px}
.result-hero p{margin:0;font-size:12px;color:var(--muted);line-height:1.7}
.next-card{margin-top:22px;border:1px solid var(--line);background:var(--card);padding:18px;border-radius:4px}
.next-card .k{font-size:10px;letter-spacing:.18em;color:var(--accent);font-weight:600}
.next-card .t{font-size:18px;font-weight:600;margin-top:8px}
.next-card .d{font-size:12px;color:var(--muted);margin-top:6px}

/* ---------- me / teacher ---------- */
.section{margin-top:26px}
.section h2{font-size:11px;letter-spacing:.18em;color:var(--muted);font-weight:600;margin:0 0 12px;text-transform:uppercase}
.profile{display:flex;align-items:center;gap:14px;padding:18px 0;border-bottom:1px solid var(--line)}
.profile .pic{width:58px;height:58px;border-radius:50%;background:var(--blue);color:#fff;display:grid;place-items:center;font-size:20px;font-weight:700}
.profile h3{margin:0;font-size:19px}
.profile p{margin:5px 0 0;font-size:11px;color:var(--muted);font-family:var(--num);letter-spacing:.05em}
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);border-radius:4px;overflow:hidden;background:var(--card)}
.stat{padding:16px 12px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat b{display:block;font-family:var(--num);font-size:24px;font-weight:600;letter-spacing:-.02em}
.stat span{display:block;font-size:10px;color:var(--muted);margin-top:4px;letter-spacing:.08em}
.admin-row{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center;padding:14px 0;border-bottom:1px solid var(--line);text-align:left;width:100%}
.admin-row .nm{font-size:14px;font-weight:600}
.admin-row .meta{font-size:10px;color:var(--muted);margin-top:3px;font-family:var(--num);letter-spacing:.04em}
.mini-bar{height:2px;background:var(--line);margin-top:8px}
.mini-bar i{display:block;height:100%;background:var(--accent)}
.admin-row .right{font-family:var(--num);font-size:11px;color:var(--muted);text-align:right}
.detail-list .lesson{padding:12px 0}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.form-grid .field{margin-bottom:0}
.form-grid .full{grid-column:1/-1}
.notice{font-size:11px;color:var(--muted);line-height:1.8;padding:10px 0}
.empty{padding:30px 0;text-align:center;color:var(--muted);font-size:12px}

/* ---------- misc ---------- */
.toast{position:fixed;left:50%;bottom:calc(28px + env(safe-area-inset-bottom));transform:translate(-50%,16px);background:var(--ink);color:#fff;font-size:12px;padding:11px 16px;border-radius:4px;opacity:0;pointer-events:none;transition:.25s;z-index:99;max-width:80vw;text-align:center;line-height:1.5}
.toast.show{opacity:1;transform:translate(-50%,0)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ---------- chapter sheet ---------- */
.sheet-wrap{position:absolute;inset:0;background:rgba(22,24,29,.38);z-index:60;display:flex;align-items:flex-end;animation:fadeIn .18s ease both}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes sheetUp{from{transform:translateY(24px);opacity:.6}to{transform:none;opacity:1}}
.sheet{width:100%;background:var(--paper);border-radius:16px 16px 0 0;padding:22px 22px calc(22px + env(safe-area-inset-bottom));max-height:72%;overflow-y:auto;animation:sheetUp .28s cubic-bezier(.2,.8,.2,1) both}
.sheet-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.sheet-head h3{margin:0;font-size:13px;letter-spacing:.14em;color:var(--muted);font-weight:600}
.sheet-item{display:grid;grid-template-columns:34px 1fr auto;gap:10px;align-items:center;padding:14px 0;border-top:1px solid var(--line);width:100%;text-align:left}
.sheet-item .k{font-family:var(--num);font-size:11px;color:var(--accent)}
.sheet-item .t{font-size:15px;font-weight:600}
.sheet-item .m{font-family:var(--num);font-size:10px;color:var(--muted)}
.sheet-item.on .t{color:var(--accent)}
.sheet-item.done .k{color:var(--ok)}
.timeline{height:3px;background:var(--line);margin-top:8px;position:relative}
.timeline i{display:block;height:100%;background:var(--accent);transition:width .5s cubic-bezier(.2,.8,.2,1)}
.time-label{display:flex;justify-content:space-between;font-family:var(--num);font-size:9px;color:var(--muted);margin-top:5px;letter-spacing:.04em}






/* ---------- avatar acting ---------- */
.char.avatar{overflow:visible}
.avatar .mouth-open,
.avatar .mouth-o,
.avatar .eye-smile{opacity:0}
.avatar .mouth-open,
.avatar .mouth-o{transform-box:fill-box;transform-origin:center}
.avatar.talking .mouth-smile{opacity:0}
.avatar.talking .mouth-open{opacity:1;animation:talk .3s ease-in-out infinite}
@keyframes talk{
  0%,100%{transform:scaleY(.32)}
  50%{transform:scaleY(1)}
}
.avatar.happy .eye{opacity:0}
.avatar.happy .eye-smile{opacity:1}
.avatar.happy .brow{transform:translateY(-3px)}
.avatar.think .brow{transform-box:fill-box;transform-origin:center}
.avatar.think .brow.left{transform:rotate(10deg)}
.avatar.think .brow.right{transform:rotate(-8deg)}
.avatar.think .eye{translate:0 -2px}
.avatar.surprise .eye{scale:1.18}
.avatar.surprise .brow{transform:translateY(-5px)}
.avatar.surprise .mouth-smile{opacity:0}
.avatar.surprise .mouth-o{opacity:1}
.avatar .brow{transition:transform .25s ease}

.avatar .bob{animation:bob 4.2s ease-in-out infinite;transform-origin:160px 410px}
@keyframes bob{0%,100%{transform:translateY(0) rotate(0)}50%{transform:translateY(-7px) rotate(-1deg)}}
.avatar .eye{animation:blink 5.4s infinite;transform-box:fill-box;transform-origin:center}
@keyframes blink{0%,93%,100%{transform:scaleY(1)}96%{transform:scaleY(.12)}}
 
/* ---------- character actor ---------- */ 
.char-actor{position:absolute;right:2px;bottom:0;width:48%;max-width:230px;aspect-ratio:400/470;pointer-events:none;filter:drop-shadow(0 18px 20px rgba(22,24,29,.12));transform-origin:50% 100%;animation:actor-idle 4.8s ease-in-out infinite} 
.char-actor .char-shadow{position:absolute;left:14%;right:14%;bottom:-2%;height:7%;border-radius:50%;background:rgba(22,24,29,.12);filter:blur(6px)} 
.char-actor img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:bottom center;user-select:none;pointer-events:none} 
.char-actor .char-face{animation:face-in .38s cubic-bezier(.2,.8,.2,1) both} 
.char-actor .char-mouth{opacity:0;clip-path:ellipse(18% 13% at 50% 63%);transform-origin:50% 63%;will-change:opacity,transform} 
.char-actor.talking{animation:actor-talk .46s ease-in-out infinite alternate} 
.char-actor.talking .char-mouth{animation:mouth-flap .16s steps(2,end) infinite} 
.char-actor.talking .char-face{animation:face-in .38s cubic-bezier(.2,.8,.2,1) both,face-talk .9s ease-in-out infinite} 
.char-face.pop{animation:face-pop .42s cubic-bezier(.2,.9,.3,1.35) both} 
.scene.quote .char-actor{width:34%;max-width:170px;opacity:.96} 
.scene.recap .char-actor{width:30%;max-width:150px;opacity:.96} 
.scene.end .char-actor{width:38%;max-width:180px} 
@keyframes actor-idle{0%,100%{transform:translateY(0) rotate(0)}50%{transform:translateY(-5px) rotate(-.6deg)}} 
@keyframes actor-talk{0%{transform:translateY(0) rotate(-1deg) scale(1)}100%{transform:translateY(-7px) rotate(1.6deg) scale(1.02)}} 
@keyframes face-in{from{opacity:0;transform:translateY(10px) scale(.97)}to{opacity:1;transform:none}} 
@keyframes face-talk{0%,100%{transform:translateY(0)}50%{transform:translateY(-2px)}} 
@keyframes mouth-flap{0%,45%{opacity:0;transform:scaleY(.75)}50%,100%{opacity:1;transform:scaleY(1.08)}} 
@keyframes face-pop{0%{transform:scale(.9) rotate(-4deg)}55%{transform:scale(1.09) rotate(2.5deg)}100%{transform:scale(1) rotate(0)}} 
@media (max-width:420px){.char-actor{max-width:200px}.scene.recap .char-actor{max-width:132px}} 
.char-actor{width:56%;max-width:260px;z-index:1} 
.scene.quote .char-actor{width:38%;max-width:190px} 
.scene.recap .char-actor{width:34%;max-width:170px} 
.scene.end .char-actor{width:42%;max-width:210px} 
.scene.quote blockquote,.scene.quote .note,.scene.recap .card,.scene.end h2,.scene.end p,.scene.end .ring{position:relative;z-index:2} 
 
/* ---------- numbered page strip ---------- */ 
.dots{counter-reset:page;display:flex;align-items:center;gap:3px;margin-top:7px;overflow-x:auto;padding:1px 0 2px;scrollbar-width:none} 
.dots::-webkit-scrollbar{display:none} 
.dots i{counter-increment:page;flex:0 0 auto;height:20px;min-width:20px;padding:0 4px;border-radius:6px;border:1px solid var(--line);background:transparent;display:grid;place-items:center;font-style:normal;font-family:var(--num);font-size:9px;font-weight:700;color:var(--muted);transition:.2s;line-height:1} 
.dots i::before{content:counter(page)} 
.dots i.done{background:var(--line);border-color:transparent;color:var(--ink-2);opacity:.7} 
.dots i.on{background:var(--accent);border-color:var(--accent);color:#fff;opacity:1;box-shadow:0 0 0 3px rgba(228,87,46,.18);transform:translateY(-1px)} 
.char-actor{width:42%;max-width:200px;right:-2px;bottom:-4px} 
.scene.quote .char-actor{width:30%;max-width:150px} 
.scene.recap .char-actor{width:28%;max-width:140px} 
.scene.end .char-actor{width:34%;max-width:170px} 
@media (max-width:420px){.char-actor{max-width:180px}.scene.recap .char-actor{max-width:124px}} 
.speech-voice{position:relative;z-index:6;align-self:flex-start;margin-top:14px;border:1px solid var(--line);background:#fff;color:var(--ink-2);font:600 11px/1 var(--num);padding:9px 14px;border-radius:999px;cursor:pointer;box-shadow:0 4px 12px rgba(22,24,29,.06)} 
.speech-voice.playing{background:var(--accent);border-color:var(--accent);color:#fff} 
.voice-fab{position:fixed;left:20px;bottom:calc(96px + env(safe-area-inset-bottom));z-index:50;display:flex;align-items:center;justify-content:center;gap:8px;min-width:118px;height:46px;padding:0 18px;margin:0;border:0;border-radius:999px;background:var(--accent);color:#fff;font:700 13px/1 var(--num);letter-spacing:.04em;box-shadow:0 12px 30px rgba(216,71,43,.32);cursor:pointer;transition:.2s;align-self:auto} 
.voice-fab.playing{background:var(--ink);box-shadow:0 12px 30px rgba(22,24,29,.28)} 
.voice-fab:active{transform:scale(.96)} 
.voice-fab.hidden{display:none} 
.login{height:100dvh;overflow-y:auto} 
@media (min-width:760px){.login{height:100%}} 
.field select{width:100%;border:0;border-bottom:1px solid var(--line-2);background:transparent;padding:9px 0 10px;font-size:17px;font-family:var(--num);letter-spacing:.04em;outline:none;border-radius:0;color:var(--ink)} 
.field select:focus{border-color:var(--accent)} 
.form-grid{margin-bottom:20px} 
.register-tip{font-size:12px;color:var(--muted);margin-top:16px;text-align:center;line-height:1.8} 
.link-btn{border:0;background:transparent;color:var(--accent);font:600 12px/1.4 var(--num);cursor:pointer;padding:0 2px;text-decoration:underline;text-underline-offset:3px} 
.bgm-toggle{position:fixed;left:20px;bottom:calc(154px + env(safe-area-inset-bottom));z-index:50;width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:rgba(255,255,255,.92);color:var(--muted);font-size:18px;line-height:1;box-shadow:0 8px 24px rgba(22,24,29,.12);cursor:pointer;transition:.2s;display:grid;place-items:center} 
.bgm-toggle.on{background:var(--ink);color:#fff;border-color:var(--ink)} 
.bgm-toggle:active{transform:scale(.94)} 
.voice-fab{min-width:80px;height:32px;padding:0 10px;font-size:10px;gap:5px;box-shadow:0 7px 18px rgba(216,71,43,.26)} 
.voice-fab.playing{box-shadow:0 7px 18px rgba(22,24,29,.24)} 
.login-head-actions{display:flex;align-items:center;gap:10px} 
.bgm-toggle{position:static;left:auto;bottom:auto;z-index:auto;width:24px;height:24px;border-radius:50%;border:1px solid var(--line);background:transparent;color:var(--muted);font-size:11px;line-height:1;display:grid;place-items:center;cursor:pointer;transition:.2s;flex:none;padding:0;box-shadow:none;margin:0 8px 0 0} 
.bgm-toggle.on{background:var(--ink);color:#fff;border-color:var(--ink)} 
.bgm-toggle:active{transform:scale(.94)} 
.bgm-toggle.on{background:var(--blue);border-color:var(--blue);color:#fff;box-shadow:0 0 0 2px rgba(46,74,125,.12)} 
.login.student-login{background:#003153;color:#F7F4EC} 
.login.student-login .login-kicker{color:rgba(255,255,255,.65)} 
.login.student-login .login-title{color:#fff} 
.login.student-login .login-title em{color:#F2C879} 
.login.student-login .login-sub{color:rgba(255,255,255,.72)} 
.login.student-login .rule{background:rgba(255,255,255,.18)} 
.login.student-login .role-switch button{border-color:rgba(255,255,255,.28);color:rgba(255,255,255,.72)} 
.login.student-login .role-switch button.on{background:#F7F4EC;color:#003153;border-color:#F7F4EC} 
.login.student-login .field label{color:rgba(255,255,255,.58)} 
.login.student-login .field input{color:#fff;border-bottom-color:rgba(255,255,255,.28)} 
.login.student-login .field input:focus{border-color:#F2C879} 
.login.student-login .field input::placeholder{color:rgba(255,255,255,.42)} 
.login.student-login .avatar-dot{background:#F7F4EC;color:#003153} 
.login.student-login .bgm-toggle{border-color:rgba(255,255,255,.42);color:#fff} 
.login.student-login .bgm-toggle.on{background:#F7F4EC;color:#003153;border-color:#F7F4EC;box-shadow:none} 
.login.student-login .btn.accent{background:#F2C879;color:#003153} 
.login.student-login .demo-box{border-color:rgba(255,255,255,.22);background:rgba(255,255,255,.06);color:rgba(255,255,255,.62)} 
.login.student-login .demo-box b{color:#fff} 
.login.student-login .register-tip{color:rgba(255,255,255,.62)} 
.login.student-login .link-btn{color:#F2C879} 
.login.student-login .login-foot{color:rgba(255,255,255,.55)} 
.bottom-nav{display:flex;border-top:1px solid var(--line);background:var(--paper);padding:6px 0 calc(6px + env(safe-area-inset-bottom));flex:none} 
.bottom-nav button{flex:1;border:0;background:transparent;display:flex;flex-direction:column;align-items:center;gap:2px;font-size:10px;color:var(--muted);padding:4px 0;cursor:pointer} 
.bottom-nav button.on{color:var(--accent);font-weight:700} 
.bottom-nav .ico{font-size:15px;line-height:1;font-weight:700} 
.bottom-nav b{font-size:10px;font-weight:600} 
.role-note{font-size:10px;line-height:1.6;color:var(--muted);margin:-14px 0 18px} 
.login.student-login .role-note{color:rgba(255,255,255,.55)} 
.pw-field{position:relative} 
.pw-field input{padding-right:44px} 
.pw-toggle{position:absolute;right:0;bottom:9px;border:0;background:transparent;color:var(--muted);font-size:10px;cursor:pointer;padding:0 2px} 
.login.student-login .pw-toggle{color:rgba(255,255,255,.65)} 
.login.student-login{background:radial-gradient(circle at 18% 0%,#3B2A66 0%,#1D1438 48%,#0E0A1C 100%);color:#F7F4EC} 
.login.student-login .role-switch button.on{background:#F7F4EC;color:#1D1438;border-color:#F7F4EC} 
.login.student-login .avatar-dot{background:#F7F4EC;color:#1D1438} 
.login.student-login .bgm-toggle.on{background:#F7F4EC;color:#1D1438;border-color:#F7F4EC;box-shadow:none} 
.login.student-login .btn.accent{background:#F2C879;color:#1D1438} 
.char-actor{width:46%;max-width:230px;aspect-ratio:3/4} 
.char-actor .char-mouth{clip-path:ellipse(20% 11% at 50% 15%);transform-origin:50% 15%} 
:root{--accent:#194B94;--blue:#194B94} 
.login.student-login{background:radial-gradient(circle at 18% 0%,#2A5A9E 0%,#12335F 45%,#07182E 100%);color:#F7F4EC} 
.login.student-login .btn.accent{background:#194B94;color:#fff} 
.login.student-login .role-switch button.on{background:#F7F4EC;color:#0B1F3A;border-color:#F7F4EC} 
.login.student-login .avatar-dot{background:#F7F4EC;color:#0B1F3A} 
.login.student-login .bgm-toggle.on{background:#F7F4EC;color:#0B1F3A;border-color:#F7F4EC;box-shadow:none} 
:root{--paper:#F8F9FA;--paper-2:#EEF1F4;--card:#FDFDFD;--ink:#000000;--ink-2:#2D3436;--muted:#6B7280;--line:rgba(45,52,54,.12);--line-2:#D1D5DB;--bad:#FF8C38;--warm:#FF8C38;--accent:#194B94;--blue:#194B94} 
body{background:radial-gradient(circle at 20% 0%,rgba(25,75,148,.06),transparent 40%),#F8F9FA;color:#2D3436} 
.cover .kick{color:#FF8C38} 
.cover .line{background:#FF8C38} 
.board-phrase{border-left-color:#FF8C38} 
.speech::before{color:#FF8C38} 
.quote .mark{color:#FF8C38} 
.board-item .k{color:#FF8C38} 
.recap .kick{color:#FF8C38} 
.dots i.on{background:#FF8C38;border-color:#FF8C38;box-shadow:0 0 0 3px rgba(255,140,56,.18)} 
.option.wrong{border-color:#FF8C38;background:#FFF1E6} 
.option.wrong .l{background:#FF8C38;border-color:#FF8C38} 
.feedback{border-left-color:#FF8C38} 
.feedback b{color:#FF8C38} 
.feedback.ok{border-left-color:var(--ok)} 
.feedback.ok b{color:var(--ok)} 
.login.student-login .login-title em{color:#FF8C38} 
.login.student-login .link-btn{color:#FF8C38} 
.btn{background:#194B94;border-color:#194B94;color:#fff} 
.dots{gap:2px} 
.dots i{min-width:18px;padding:0 3px;font-size:9px} 
.dots i{cursor:pointer} 
.char-actor .char-mouth{clip-path:ellipse(32% 20% at 50% 16%);opacity:0} 
.char-actor.talking .char-mouth{animation:mouth-flap .22s steps(2,end) infinite} 
.char-actor .char-mouth{clip-path:none;opacity:0;transform:none} 
.char-actor.talking .char-mouth{animation:math-mouth-flap .24s steps(2,end) infinite} 
@keyframes math-mouth-flap{0%,45%{opacity:0}50%,100%{opacity:1}}