@charset "UTF-8";
:root{--bg:#fff6e0;--paper:#fffdf7;--ink:#28324a;--muted:#6b7286;--line:#eadfc6;--coral:#ff6b4a;--coral-d:#e04f2f;--sky:#3fa7f5;--sun:#ffc93c;--mint:#22b89a;--grape:#8e6cf0;--ok:#1f9d6b;--ok-bg:#e3f8ee;--warn:#e07a2f;--warn-bg:#fff0e1;--radius:22px;--shadow:0 6px 0 rgba(40,50,74,.12);--font:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC","Hiragino Sans GB","WenQuanYi Micro Hei",system-ui,sans-serif;--round:var(--font);font-family:var(--font);font-size:18px;line-height:1.7;color:var(--ink)}
*{box-sizing:border-box}
body{margin:0;background:var(--bg) radial-gradient(circle,#f5e3b8 1.4px,transparent 1.6px) 0 0/26px 26px;min-height:100vh}
button,input,select{font:inherit;color:inherit}
button,a,input,select{-webkit-tap-highlight-color:transparent}
button,select{cursor:pointer}
button{min-height:46px;padding:8px 18px;border:2px solid var(--line);border-radius:14px;background:var(--paper);font-size:16px;font-weight:700;line-height:1.4;box-shadow:0 3px 0 rgba(40,50,74,.08);transition:transform .12s,background .12s}
button:hover:not(:disabled){border-color:var(--coral);background:#fff3ee}
button:active:not(:disabled){transform:translateY(2px);box-shadow:none}
button:disabled{cursor:default;opacity:.55}
button.primary,.button.primary{background:var(--coral);border-color:var(--coral-d);color:#fff;box-shadow:0 4px 0 var(--coral-d)}
button.primary:hover:not(:disabled),.button.primary:hover{background:var(--coral-d)}
a{color:var(--coral-d)}
.button{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:50px;padding:10px 22px;border:2px solid var(--line);background:var(--paper);border-radius:14px;text-decoration:none;color:var(--ink);font-weight:800;font-size:17px;box-shadow:0 3px 0 rgba(40,50,74,.08)}
.button:hover{border-color:var(--coral)}
.button.big,.big-btn{font-size:20px;min-height:60px;padding:12px 28px}
.actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}.actions.center{justify-content:center}
:focus-visible{outline:4px solid var(--sky);outline-offset:3px}main:focus-visible{outline:none}
.skip{position:absolute;top:-100px;left:20px;background:#fff;padding:12px;z-index:10}.skip:focus{top:15px}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
h1,h2,h3,p{margin-top:0}
h1{font-family:var(--round);font-size:clamp(30px,3.4vw,50px);line-height:1.25;margin-bottom:14px}
.station h1{font-size:clamp(26px,2.6vw,40px);margin-bottom:6px}
h2{font-family:var(--round);font-size:26px;line-height:1.4;margin-bottom:12px}
h3{font-size:20px;margin-bottom:8px}
.eyebrow{font-size:13px;letter-spacing:1.6px;font-weight:800;color:var(--coral-d);margin-bottom:10px}
.lead{font-size:21px;color:var(--muted);max-width:760px}
.small{font-size:15px}.tiny{font-size:14px;color:var(--muted);margin:18px 0 0}.muted{color:var(--muted)}
mark{background:var(--sun);color:var(--ink);border-radius:6px;padding:0 3px;box-shadow:0 0 0 2px #ffb703 inset}
kbd{border:2px solid var(--line);border-bottom-width:4px;border-radius:8px;padding:0 8px;background:#fff;font-weight:800}

/* 页头 */
.header{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:12px 32px;background:rgba(255,253,247,.94);backdrop-filter:blur(6px);border-bottom:3px solid var(--line)}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);font-family:var(--round);font-size:22px;font-weight:800;line-height:1.2;white-space:nowrap}
.brand small{display:block;font-family:inherit;font-size:12px;letter-spacing:2px;color:var(--muted);font-weight:600;margin-top:3px}
.brand-icon{display:grid;place-items:center;width:48px;height:48px;border-radius:14px;background:var(--coral);font-size:28px;transform:rotate(-6deg);box-shadow:var(--shadow)}
.header nav{display:flex;gap:6px}
.header nav a{padding:9px 16px;border-radius:12px;color:var(--ink);text-decoration:none;font-weight:800;white-space:nowrap}
.header nav a:hover{background:#ffeede}.header nav a[aria-current]{background:var(--sun)}
.tools{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.tools button{min-height:40px;padding:6px 12px;font-size:15px}
.volume-label{font-size:14px;color:var(--muted)}#volume{width:90px;accent-color:var(--coral)}
main{max-width:1440px;margin:0 auto;padding:22px 32px 50px;min-height:70vh}
footer{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;padding:22px 32px;border-top:3px solid var(--line);background:var(--paper);font-size:15px;color:var(--muted)}
footer a{font-weight:700}

/* 首页 */
.hero{position:relative;background:var(--paper);border:3px solid var(--line);border-radius:30px;overflow:hidden;box-shadow:var(--shadow)}
.title-mark{color:var(--coral);text-shadow:3px 3px 0 var(--sun)}
.map{margin-top:40px}
.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;flex-wrap:wrap;margin-bottom:18px}
.section-heading h2{margin:0}.section-heading p{margin:0}
.map-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.map-card{position:relative;display:flex;flex-direction:column;gap:2px;padding:18px;border-radius:var(--radius);text-decoration:none;color:var(--ink);background:var(--paper);border:3px solid var(--line);box-shadow:var(--shadow);transition:transform .15s}
.map-card:hover{transform:translateY(-4px) rotate(-1deg)}
.map-card.c0{border-color:#ffc2b3}.map-card.c1{border-color:#a9d8fb}.map-card.c2{border-color:#ffe08a}.map-card.c3{border-color:#a6e9d9}.map-card.c4{border-color:#d3c6fb}
.map-icon{font-size:40px;line-height:1.1}
.map-num{font-size:13px;font-weight:800;color:var(--muted)}
.map-card strong{font-family:var(--round);font-size:19px;line-height:1.35}
.map-card small{color:var(--muted);font-size:14px}
.online-tips{margin-top:36px;background:#eaf6ff;border:3px solid #bfe2fc;border-radius:var(--radius);padding:24px 28px}
.tip-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.tip-grid p{margin:0;background:#fff;border-radius:16px;padding:14px 16px;font-size:16px}
.bottom-invite{margin-top:36px;text-align:center;padding:34px;background:var(--sun);border-radius:30px;box-shadow:var(--shadow)}

/* 学习站 */
.learn-layout{display:grid;grid-template-columns:250px 1fr;gap:26px;align-items:start}
.station-nav{position:sticky;top:16px;display:flex;flex-direction:column;gap:4px;background:var(--paper);border:3px solid var(--line);border-radius:var(--radius);padding:12px;max-height:calc(100vh - 32px);overflow:auto}
.station-nav a{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:12px;color:var(--ink);text-decoration:none;font-weight:700;font-size:15px;line-height:1.35}
.station-nav a:hover{background:#fff1e4}
.station-nav a[aria-current]{background:var(--sun)}
.station-nav .back-map{color:var(--coral-d);border-bottom:2px dashed var(--line);border-radius:0;margin-bottom:4px}
.nav-icon{font-size:20px}.nav-num{font-size:12px;color:var(--muted);min-width:20px}
.station{background:var(--paper);border:3px solid var(--line);border-radius:30px;padding:18px 30px 26px;box-shadow:var(--shadow);min-width:0}
.station-top{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:6px}
.station-top .eyebrow{margin:0}
.class-stars{display:flex;align-items:center;gap:8px;background:#fff7d6;border:2px solid #ffe08a;border-radius:999px;padding:4px 6px 4px 16px;position:relative}
.cs-label{font-weight:800;font-size:15px}
#cs-num{font-family:var(--round);font-size:26px;min-width:30px;text-align:center;color:#d68a00}
#cs-num.bump{animation:bump .5s}
.cs-plus{min-height:38px;padding:4px 14px;background:var(--sun);border-color:#f0b400;border-radius:999px}
.cs-reset{min-height:34px;padding:2px 10px;font-size:13px;border-radius:999px;box-shadow:none}
.title-icon{display:inline-block;margin-right:12px;transform:rotate(-8deg)}
.english-heading{font-family:Georgia,serif;font-style:italic;color:var(--muted);font-size:20px;margin:-6px 0 16px}
.step-tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:20px}
.step-tabs button{display:flex;align-items:center;gap:8px;border-radius:999px;padding:6px 18px 6px 8px}
.step-tabs button span{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--line);font-size:15px}
.step-tabs button.on{background:var(--ink);border-color:var(--ink);color:#fff}
.step-tabs button.on span{background:var(--sun);color:var(--ink)}
.step-footer{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-top:26px;padding-top:20px;border-top:3px dashed var(--line)}
.key-hint{font-size:14px;color:var(--muted)}
.rule-card{position:relative;background:#fff3c4;border-radius:20px;padding:18px 24px 18px 66px;font-size:22px;line-height:1.6;border:3px solid #ffe08a}
.rule-card p{margin:0}.rule-card b{color:var(--coral-d)}
.rule-pin{position:absolute;left:18px;top:16px;font-size:32px}
.points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;list-style:none;padding:0;margin:16px 0 22px}
.points li{background:#f2f8ff;border-radius:16px;padding:12px 16px;font-size:17px;border-left:6px solid var(--sky)}
.points li:nth-child(2){background:#effbf7;border-color:var(--mint)}.points li:nth-child(3){background:#f5f1ff;border-color:var(--grape)}
.widget{border:3px solid var(--line);border-radius:24px;padding:20px 22px;background:#fff}
.widget-head{display:flex;flex-wrap:wrap;align-items:center;gap:8px 18px;margin-bottom:14px}
.widget-head h2{margin:0;font-size:24px}.widget-head p{margin:0;color:var(--muted);flex:1;min-width:200px}
.speak{min-height:40px;padding:4px 14px;font-size:15px;border-radius:999px;background:#eaf6ff;border-color:#bfe2fc}

/* 互动时间 */
.guess-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.mode-badge{border-radius:999px;padding:6px 18px;font-weight:800;font-size:18px}
.mode-chat{background:#eaf6ff}.mode-hand{background:#fff3c4}.mode-read{background:#f5f1ff}.mode-show{background:#e3f8ee}
.guess-count{color:var(--muted);font-weight:700}
.guess-card{display:grid;grid-template-columns:1.1fr 1fr;gap:10px 28px;align-items:center;text-align:center;background:#fff;border:3px solid var(--line);border-radius:28px;padding:20px 24px}
.guess-left{min-width:0}.guess-right{min-width:0}
.guess-show{font-size:76px;line-height:1.2;margin-bottom:6px}
.guess-q{font-family:var(--round);font-size:34px;line-height:1.4}
.timer-row{display:flex;justify-content:center;align-items:center;gap:16px;margin:0 0 12px}
.timer{display:flex;align-items:baseline;gap:2px;justify-content:center;width:90px;height:90px;border-radius:50%;border:6px solid var(--line);align-items:center;font-family:var(--round)}
.timer span{font-size:36px}.timer small{font-size:14px}
.timer.running{border-color:var(--sky);animation:tick 1s steps(1) infinite}
.timer.done{border-color:var(--coral);background:#fff3ee}
.answer-box{position:relative;min-height:110px;border-radius:20px;background:repeating-linear-gradient(45deg,#f4f1ea 0 12px,#ece7dc 12px 24px);display:flex;flex-direction:column;justify-content:center;padding:12px;margin-bottom:16px}
.answer-box.shown{background:var(--ok-bg);border:3px solid #8fdcc3;animation:growIn .4s}
.answer-wait{font-size:22px;color:var(--muted);margin:0}
.answer-text{font-family:var(--round);font-size:40px;color:var(--ok);margin:0}
.answer-tip{margin:0;font-size:18px}
.guess-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:10px}
.challenge-intro{text-align:center;padding:20px}.big-emoji{font-size:80px;margin:0}

/* 小检查与练习 */
.mini{text-align:center;max-width:860px;margin:0 auto}
.mini-show{font-size:60px;margin:0}
.mini h2{font-size:30px}
.choices{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin:16px 0}
.choice{display:flex;align-items:center;gap:12px;min-height:66px;padding:10px 16px;border-radius:18px;font-size:22px;text-align:left;border-width:3px}
.choice-letter{display:grid;place-items:center;flex:none;width:36px;height:36px;border-radius:50%;background:var(--line);font-size:16px}
.choice.selected{border-color:var(--sky);background:#eaf6ff}.choice.selected .choice-letter{background:var(--sky);color:#fff}
.choice.correct{border-color:var(--ok);background:var(--ok-bg);opacity:1}.choice.correct .choice-letter{background:var(--ok);color:#fff}
.choice.wrong{border-color:var(--coral);background:#ffe3dc;opacity:1}
.choice-icon{margin-left:auto;color:var(--ok);font-weight:900;font-size:26px}
.feedback{position:relative;border-radius:18px;padding:14px 18px;background:#f7f4ec;margin-bottom:16px;text-align:left;font-size:18px}
.feedback p{margin:4px 0 0}
.feedback strong{font-size:22px}
.feedback.success{background:var(--ok-bg);border:3px solid #8fdcc3}.feedback.success strong{color:var(--ok)}
.feedback.gentle{background:var(--warn-bg);border:3px solid #ffcf9f}.feedback.gentle strong{color:var(--warn)}
.feedback.pop{animation:growIn .4s}
.mini .actions{justify-content:center}
.teacher-note{margin-top:24px;background:#f5f1ff;border-radius:16px;padding:10px 16px}
.teacher-note summary{cursor:pointer;font-weight:800}

.practice-page{max-width:980px;margin:0 auto}
.resume{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;background:#fff3c4;border:3px solid #ffe08a;border-radius:20px;padding:14px 20px;margin:20px 0}
.resume p{margin:0}
.quick-packs{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:22px 0}
.pack{display:flex;flex-direction:column;align-items:flex-start;gap:4px;min-height:150px;border-radius:24px;padding:18px 20px;text-align:left;border-width:3px;box-shadow:var(--shadow)}
.pack.c0{background:#fff3ee;border-color:#ffb39f}.pack.c1{background:#eaf6ff;border-color:#9fd3fb}.pack.c2{background:#fff7d6;border-color:#ffe08a}
.pack-icon{font-size:34px}.pack strong{font-family:var(--round);font-size:23px}.pack small{color:var(--muted);font-weight:600}
.practice-settings,.practice-rules{background:var(--paper);border:3px solid var(--line);border-radius:24px;padding:22px 26px;margin-bottom:18px}
.filters{display:flex;flex-wrap:wrap;gap:18px;margin-bottom:10px}
.select-label{display:flex;flex-direction:column;gap:4px;font-weight:800}
select{min-height:48px;border:2px solid var(--line);border-radius:12px;padding:6px 12px;background:#fff;font-size:17px;min-width:240px}
.practice-top{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.practice-top .eyebrow{margin:0}
.practice-progress{display:flex;align-items:center;gap:14px;margin:12px 0 16px;flex-wrap:wrap}
progress{flex:1;min-width:160px;height:16px;accent-color:var(--mint)}
.streak{background:#fff0e1;border-radius:999px;padding:2px 14px;font-weight:800;color:var(--coral-d);animation:growIn .35s}
.question-sheet{position:relative;background:var(--paper);border:3px solid var(--line);border-radius:30px;padding:26px 30px;box-shadow:var(--shadow);text-align:center}
.q-show{font-size:56px;line-height:1.25;margin-bottom:8px}
.question-sheet h2{font-size:26px}
.question-sentence{font-family:var(--round);font-size:32px;margin:0 0 6px}
.blank{color:var(--coral);letter-spacing:2px}
.spell{margin:18px auto}
#spell-input{width:min(100%,420px);font-family:var(--round);font-size:34px;text-align:center;padding:10px 16px;border:4px solid var(--line);border-radius:18px;background:#fff}
#spell-input:focus{border-color:var(--sky);outline:none}
#spell-input.correct{border-color:var(--ok);background:var(--ok-bg)}#spell-input.wrong{border-color:var(--coral);background:#ffe3dc}
.practice-controls{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.practice-controls div{display:flex;gap:10px}
.pause-button{min-height:36px;padding:2px 12px;margin-left:8px;font-size:14px}
.award{position:relative;text-align:center;background:var(--paper);border:3px solid #ffe08a;border-radius:30px;padding:24px;margin:20px 0;box-shadow:var(--shadow);overflow:hidden}
.award-spark{font-size:64px}
.stars{display:flex;justify-content:center;gap:6px;font-size:58px;line-height:1}
.star{position:relative;display:inline-block}
.star-base{color:#eadfc6}
.star-fill{position:absolute;left:0;top:0;overflow:hidden;color:#ffb703;white-space:nowrap}
.star-score{font-size:22px}.star-score b{font-family:var(--round);font-size:36px}
#celebration{position:absolute;left:50%;top:40%;pointer-events:none}
.confetti{position:absolute;font-size:26px;animation:confetti 1.6s ease-out var(--d) both}
.review-heading{margin-top:30px}
.result-item{background:var(--paper);border:2px solid var(--line);border-radius:16px;padding:10px 16px;margin-bottom:10px}
.result-item summary{cursor:pointer;font-weight:700}
.burst{position:absolute;right:12px;top:-6px;font-size:26px;color:#ffb703;pointer-events:none;animation:burst 1s ease-out forwards;z-index:3}

dialog{max-width:680px;border:3px solid var(--line);border-radius:24px;padding:22px 28px;background:var(--paper);color:var(--ink)}
dialog::backdrop{background:rgba(40,50,74,.45)}
.dialog-head{display:flex;justify-content:space-between;align-items:center;gap:12px}
dialog ul{padding-left:20px}

/* 课堂大字：线上共享屏幕时更清楚 */
body.large .rule-card{font-size:27px}
body.large .points li{font-size:21px}
body.large .say{font-size:44px}
body.large .guess-q{font-size:44px}
body.large .guess-show{font-size:100px}
body.large .answer-text{font-size:52px}
body.large .card-front{font-size:34px}body.large .card-back{font-size:42px}
body.large .mini h2{font-size:38px}
body.large .choice{font-size:27px}
body.large .seat-sentence{font-size:46px}body.large .pick-btn{font-size:32px}body.large .story{font-size:30px}body.large .cell{font-size:24px}

@keyframes growIn{from{transform:scale(.6);opacity:0}to{transform:scale(1);opacity:1}}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-8px)}75%{transform:translateX(8px)}}
@keyframes bump{50%{transform:scale(1.6)}}
@keyframes wave{0%,100%{transform:rotate(-10deg)}50%{transform:rotate(18deg)}}
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.08)}}
@keyframes tick{50%{border-color:#9fd3fb}}
@keyframes burst{from{transform:translateY(10px) scale(.6);opacity:0}30%{opacity:1}to{transform:translateY(-30px) scale(1.3);opacity:0}}
@keyframes confetti{from{transform:translate(0,0) scale(.4);opacity:0}20%{opacity:1}to{transform:translate(var(--x),-140px) rotate(200deg);opacity:0}}

@media (max-width:1100px){.map-grid{grid-template-columns:repeat(3,1fr)}.tip-grid{grid-template-columns:1fr 1fr}.points{grid-template-columns:1fr}}
@media (max-width:860px){
 .header{flex-wrap:wrap;padding:10px 16px;position:static}.tools{width:100%;justify-content:flex-start}
 main{padding:18px 16px 40px}
 .hero-inner{grid-template-columns:1fr;padding:22px}
 .learn-layout{grid-template-columns:1fr}
 .station-nav{position:static;flex-direction:row;overflow-x:auto;max-height:none}
 .station-nav a{white-space:nowrap}
 .station{padding:18px}
 .quick-packs{grid-template-columns:1fr}
 .guess-card{grid-template-columns:1fr}
}
@media (max-width:560px){
 .map-grid{grid-template-columns:1fr 1fr}.tip-grid{grid-template-columns:1fr}
 .say{font-size:26px}.small-say{font-size:20px}
 .guess-q{font-size:26px}.guess-show{font-size:60px}.question-sentence{font-size:25px}
 .card-grid{grid-template-columns:1fr 1fr}.flip-inner{min-height:170px}
 select{min-width:0;width:100%}.filters{flex-direction:column}
 footer{padding:18px 16px}
}

/* ===== 第五课：代词侦探社 ===== */
.hero{background:var(--paper) linear-gradient(135deg,#eef3ff 0%,#fffdf7 55%)}
.hero-inner{display:grid;grid-template-columns:1.1fr 1fr;gap:34px;align-items:center;padding:44px}
.case-card{position:relative;display:flex;flex-direction:column;gap:14px}
.case{background:#fff;border:3px dashed #b9c6f5;border-radius:22px;padding:14px 20px}
.case:nth-child(2){border-color:#ffc2b3}
.case-tag{display:inline-block;background:var(--ink);color:#fff;border-radius:999px;padding:2px 14px;font-size:14px;font-weight:800;margin-bottom:6px}
.case-line{font-size:22px;margin:4px 0}.case-line span{font-size:30px;margin-right:6px}
.magnifier{position:absolute;right:-8px;bottom:-14px;font-size:64px;animation:wave 3s ease-in-out infinite}

/* 通用按钮组 */
.item-picker,.shop-options,.story-picker{display:flex;flex-wrap:wrap;gap:8px}
.story-picker{margin-bottom:14px}
.item-btn{display:flex;flex-direction:column;align-items:center;gap:0;min-width:78px;padding:6px 8px;border-radius:16px;line-height:1.2}
.item-btn span{font-size:30px}.item-btn small{font-size:13px}
.item-btn.on{background:var(--sun);border-color:#f0b400}
.pill{border-radius:999px}.pill small{color:var(--muted);font-weight:600}
.pill.on{background:var(--sky);border-color:#1f8bd8;color:#fff}
.shop-row{display:flex;align-items:center;gap:14px;margin-bottom:10px;flex-wrap:wrap}
.shop-label{font-weight:800;min-width:70px}
.shop-note{display:inline-block;background:#fff;border-radius:14px;padding:6px 14px;font-weight:700;margin-bottom:10px}
.cn-phrase{font-size:20px;color:var(--muted);margin:2px 0 6px}
.say{font-family:var(--round);font-size:34px;margin:0}
.small-say{font-size:26px}
.all-done{font-weight:800;color:var(--ok);margin:0;grid-column:1/-1}
.ok{color:var(--ok);font-size:21px;font-weight:700}.oops{color:var(--warn);font-size:19px;font-weight:700}

/* 只给刚变化的元素加的一次性动效 */
.pop{animation:growIn .4s cubic-bezier(.3,1.6,.6,1)}
.glow{animation:glow .9s}
.shake{animation:shake .45s}

/* 01 替身魔术 */
.story{font-size:26px;line-height:2.1;background:#fffaf0;border:3px dashed #f0cf8a;border-radius:20px;padding:16px 22px}
.swap{display:inline-flex;align-items:baseline;gap:6px;min-height:0;padding:0 12px;font-size:inherit;line-height:1.5;border-radius:12px;background:#fff3c4;border:2px solid #ffc93c;box-shadow:0 3px 0 #f0b400;vertical-align:baseline}
button.swap:hover:not(:disabled){background:#ffe58a;border-color:#f0b400}
.swap.done{background:#e3f0ff;border-color:#7cbcf5;box-shadow:none;color:#1f6fc0;font-weight:800}
.swap.done small{font-size:14px;color:var(--muted);font-weight:600}
.story-status{font-weight:700;margin:12px 0 8px}

/* 翻牌：每张牌独立的 3D 翻转，只用 transition，重画时不会重放 */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:14px}
.flip-card{position:relative;perspective:900px}
.flip-inner{position:relative;display:block;width:100%;min-height:190px;padding:0;border:none;background:none;box-shadow:none;border-radius:20px;transform-style:preserve-3d;transition:transform .5s cubic-bezier(.4,.2,.2,1)}
.flip-inner:hover:not(:disabled){background:none}
.flip-inner:active:not(:disabled){transform:none}
.flip-card.open .flip-inner,.flip-card.open .flip-inner:active:not(:disabled){transform:rotateY(180deg)}
.face{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;padding:12px;border-radius:20px;border:3px solid #ffd8a8;background:linear-gradient(160deg,#fff 0%,#fff6e6 100%);backface-visibility:hidden;-webkit-backface-visibility:hidden}
.face.back{transform:rotateY(180deg);background:linear-gradient(160deg,#fff 0%,#e8f8f1 100%);border-color:#8fdcc3}
.flip-inner:hover .face.front{border-color:var(--coral)}
.card-emoji{font-size:44px;line-height:1.2}
.card-front{font-family:var(--round);font-size:26px;line-height:1.3;text-align:center}
.card-small{font-size:15px;color:var(--muted)}
.card-q{font-size:36px;font-weight:800;color:#f0b400}
.card-arrow{color:var(--muted);font-size:16px;line-height:1}
.card-back{font-family:var(--round);font-size:34px;color:var(--ok);font-weight:800}
.card-label{font-size:13px;background:#fff;border-radius:999px;padding:0 10px;color:var(--muted)}
.flip-card .speak{position:absolute;right:8px;top:8px;min-height:34px;padding:0 8px;z-index:2}
.flip-card:not(.open) .speak{visibility:hidden}

/* 03 指认谁 & 05 句子座位 */
.pick-stage{display:flex;align-items:center;justify-content:center;gap:30px;flex-wrap:wrap;background:#f2f8ff;border-radius:22px;padding:16px}
.suspect{display:flex;flex-direction:column;align-items:center;background:#fff;border:3px solid #bfe2fc;border-radius:22px;padding:10px 26px}
.suspect-e{font-size:72px;line-height:1.1}.suspect b{font-family:var(--round);font-size:28px}.suspect small{color:var(--muted)}
.blank-box{display:inline-block;min-width:96px;text-align:center;border-bottom:5px solid var(--coral);color:var(--coral)}
.blank-box.filled{color:var(--ok);border-color:var(--ok)}
.pick-options{display:flex;justify-content:center;flex-wrap:wrap;gap:14px;margin:18px 0 8px}
.pick-btn{min-width:120px;min-height:64px;font-family:var(--round);font-size:28px;border-radius:18px;border-width:3px}
.pick-btn.correct{background:var(--ok-bg);border-color:var(--ok);color:var(--ok);opacity:1}
.pick-btn.wrong{background:#ffe3dc;border-color:var(--coral)}
.pick-feedback{text-align:center;min-height:56px}.pick-feedback button{margin:4px}
.seat-legend{display:flex;gap:10px;justify-content:center;margin-bottom:8px}
.lg{border-radius:999px;padding:2px 14px;font-size:15px;font-weight:700}
.lg.subj{background:#e3f0ff;color:#1f6fc0}.lg.obj{background:#fff0e1;color:#c25a12}
.seat-sentence{font-family:var(--round);font-size:36px;text-align:center;line-height:1.9;background:#fffaf0;border-radius:20px;padding:18px}
.seat-box{display:inline-flex;flex-direction:column;align-items:center;vertical-align:middle;min-width:120px;line-height:1.3;padding:4px 14px;margin:0 6px;border-radius:14px;border:3px dashed #c9bfa7;background:#fff;color:var(--muted)}
.seat-box small{font-family:var(--font);font-size:14px;font-weight:700}
.seat-box.subj{border:3px solid #3fa7f5;background:#e3f0ff;color:#1f6fc0}
.seat-box.obj{border:3px solid #f08a3c;background:#fff0e1;color:#c25a12}
.seat-box.filled{font-weight:800}

/* 06 贴名字标签 */
.label-board{margin-top:14px;text-align:center;background:#fff7e8;border:3px solid #f0cf8a;border-radius:22px;padding:18px}
.tagged{display:flex;align-items:center;justify-content:center;gap:12px;margin-bottom:6px}
.tag-thing{font-size:84px;line-height:1.1}
.name-tag{position:relative;display:flex;flex-direction:column;align-items:center;background:#fff;border:3px solid var(--coral);border-radius:12px 22px 22px 12px;padding:4px 22px;transform:rotate(-6deg);box-shadow:var(--shadow)}
.name-tag small{font-size:12px;color:var(--muted)}.name-tag b{font-family:var(--round);font-size:32px;color:var(--coral-d)}
.label-board .say mark{padding:0 6px}

/* 08 失物招领 */
.lost-box{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:10px;min-height:60px}
.lost-item{display:flex;flex-direction:column;align-items:center;gap:0;padding:8px;border-radius:18px;background:#f5f1ff;border-color:#d3c6fb;line-height:1.25}
.lost-item.on{background:var(--sun);border-color:#f0b400;transform:translateY(-3px)}
.lost-e{font-size:40px}.lost-item b{font-family:var(--round);font-size:20px}
.lost-tag{font-size:13px;background:#fff;border-radius:999px;padding:0 8px;margin-top:4px;font-weight:600}
.lost-ask{margin:14px 0;background:#fff;border:3px solid var(--line);border-radius:20px;padding:12px 16px;text-align:center}
.answer-row{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin:8px 0}
.answer-row .pill{font-family:var(--round);font-size:19px}
.lost-msg{margin:4px 0 0;font-weight:700}
.owners{display:grid;grid-template-columns:repeat(6,1fr);gap:10px}
.owner-shelf{display:flex;flex-direction:column;align-items:center;gap:2px;background:#fffaf0;border:3px solid var(--line);border-bottom-width:8px;border-radius:18px;padding:8px 6px;min-height:130px;text-align:center}
.owner-e{font-size:34px}.owner-shelf b{font-size:15px;line-height:1.3}
.owner-items{display:flex;flex-wrap:wrap;justify-content:center;gap:2px;font-size:28px}

/* 09 代词总表 */
.table-tools{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.ptable-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
.ptable{width:100%;border-collapse:separate;border-spacing:6px;min-width:640px}
.ptable th{font-size:16px;text-align:center;background:#f2f8ff;border-radius:12px;padding:8px}
.ptable thead th{display:table-cell;vertical-align:top}
.ptable thead th span,.ptable thead th small{display:block}.ptable thead th small{color:var(--muted);font-weight:600}
.ptable tbody th{text-align:left;white-space:nowrap}
.col-btn{min-height:32px;padding:0 10px;margin-top:6px;font-size:13px;border-radius:999px}
.cell{position:relative;width:100%;min-height:54px;font-family:var(--round);font-size:22px;border-radius:12px;padding:4px}
.cell .cell-w{display:none}.cell .cell-q{color:#f0b400}
.cell.open{background:var(--ok-bg);border-color:#8fdcc3}
.cell.open .cell-w{display:inline}.cell.open .cell-q{display:none}
.ptable.twins .cell.twin.open{background:#fff3c4;border-color:#ffc93c;box-shadow:0 0 0 3px #ffe08a}

@keyframes glow{0%{box-shadow:0 0 0 0 rgba(255,201,60,.9)}100%{box-shadow:0 0 0 18px rgba(255,201,60,0)}}
@media (max-width:1100px){.owners{grid-template-columns:repeat(3,1fr)}}
@media (max-width:560px){
 .story{font-size:20px;padding:12px}.seat-sentence{font-size:24px;padding:12px}.pick-btn{min-width:90px;font-size:22px}
 .owners{grid-template-columns:repeat(2,1fr)}.lost-box{grid-template-columns:repeat(2,1fr)}.tag-thing{font-size:60px}.name-tag b{font-size:24px}
 .case-line{font-size:18px}.magnifier{font-size:44px}
}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}

/* 第六课：be 动词三种颜色 */
.brand-icon{background:var(--mint)}
.be-word{display:inline-block;border-radius:10px;padding:0 8px;font-weight:800;color:#fff;line-height:1.35}
.be-word.am,.cham.am{background:#f08a3c}.be-word.is,.cham.is{background:#22b89a}.be-word.are,.cham.are{background:#3fa7f5}
.case-line .be-word{font-size:22px}
.cham-board{margin-top:14px;text-align:center;background:#f2fbf7;border:3px solid #bfe9d9;border-radius:22px;padding:18px}
.cham{display:inline-flex;align-items:center;gap:10px;border-radius:999px;padding:6px 24px 6px 12px;color:#fff;box-shadow:var(--shadow);margin-bottom:10px;transition:background .35s}
.cham-e{font-size:44px;filter:drop-shadow(0 2px 0 rgba(0,0,0,.15))}.cham b{font-size:34px;font-family:var(--round)}
.cham-legend{margin-top:12px;font-size:16px;color:var(--muted)}.cham-legend .be-word{font-size:15px}
.fill-stage{display:flex;flex-direction:column;align-items:center;gap:6px;background:#fffaf0;border-radius:22px;padding:14px}
.fill-stage .seat-sentence{background:none;padding:6px}
.fill-e{font-size:46px;line-height:1.2}
.fill-cn{font-size:32px;font-weight:800;margin:0}
.seat-box.filled.be-am{border:3px solid #f08a3c;background:#fff0e1;color:#c25a12}
.seat-box.filled.be-is{border:3px solid #22b89a;background:#e3f8ee;color:#127a62}
.seat-box.filled.be-are{border:3px solid #3fa7f5;background:#e3f0ff;color:#1f6fc0}
.pick-options.long .pick-btn{font-size:21px;min-width:0;max-width:100%;white-space:normal}
.turn-buttons{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:12px}
.turn-buttons .pill{font-size:19px;min-height:52px;padding:8px 22px}
.turn-board{text-align:center;background:#f2f8ff;border:3px solid #cfe4fb;border-radius:22px;padding:16px}
.be-mark{background:var(--sun);padding:0 6px}
.turn-answers{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin:6px 0 10px}
.ans{font-family:var(--round);font-size:22px;font-weight:800;border-radius:14px;padding:4px 16px}
.ans.yes{background:var(--ok-bg);color:var(--ok)}.ans.no{background:#ffe3dc;color:var(--coral-d)}
.room-preview{text-align:center;background:#fff7e8;border:3px solid #f0cf8a;border-radius:22px;padding:14px;margin:6px 0 14px}
.room-preview .say .be-word{font-size:30px}
.room-preview button.primary{margin-left:8px}
.room{position:relative;border:4px solid #c9a46a;border-top-width:10px;border-radius:8px 8px 22px 22px;background:#fffdf3;padding:18px 16px 12px;min-height:140px}
.room-roof{position:absolute;top:-22px;left:50%;transform:translateX(-50%);background:#c9a46a;color:#fff;font-weight:800;border-radius:999px;padding:2px 16px;font-size:15px;white-space:nowrap}
.room-items{display:flex;flex-wrap:wrap;gap:10px 18px;justify-content:center;font-size:40px;min-height:56px;align-items:center}
.room-thing{display:inline-block}
.room-lines{columns:2;margin:10px 0 0;padding-left:22px;font-size:17px}
.school-map{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;background:#eef8e8;border:3px dashed #9fd38a;border-radius:22px;padding:14px;margin-bottom:12px}
.school-thing{display:flex;flex-direction:column;align-items:center;background:#fff;border-radius:16px;padding:6px;font-size:34px;line-height:1.2;text-align:center}
.school-thing small{font-size:13px;color:var(--muted)}
.ask-q{text-align:center;margin:6px 0}
.answer-row .pill.correct{background:var(--ok-bg);border-color:var(--ok);color:var(--ok);opacity:1}
.answer-row .pill.wrong{background:#ffe3dc;border-color:var(--coral)}
body.large .fill-cn{font-size:40px}
body.large .ask-q{font-size:38px}
@media (max-width:860px){.school-map{grid-template-columns:repeat(3,1fr)}.room-lines{columns:1}}
@media (max-width:560px){.fill-cn{font-size:24px}.cham b{font-size:26px}.pick-options.long .pick-btn{font-size:18px}.room-items{font-size:32px}}