:root{
  --ink:#1F3864; --ink2:#2E5A88; --accent:#C55A11; --accent2:#E08A3C;
  --bg:#FAF7F2; --card:#FFFFFF; --line:#E6E1D8; --muted:#8A8780;
  --good:#3D6B5A; --warn:#B8860B; --bad:#A33B2A;
  --shadow:0 2px 10px rgba(31,56,100,.07), 0 12px 30px rgba(31,56,100,.05);
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB",system-ui,sans-serif;
  background:var(--bg); color:#25272B; -webkit-font-smoothing:antialiased;
  padding-bottom:60px;
}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
.hidden{display:none !important}
.muted{color:var(--muted);font-size:13px;margin-top:4px}

/* topbar */
.topbar{
  position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:24px;
  padding:12px 28px;background:rgba(250,247,242,.92);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:10px;min-width:190px}
.logo{
  width:36px;height:36px;border-radius:10px;background:var(--ink);color:#fff;
  display:grid;place-items:center;font-size:19px;font-weight:700;letter-spacing:1px;
}
.brand-txt b{display:block;font-size:15px;letter-spacing:2px;color:var(--ink)}
.brand-txt small{display:block;font-size:10px;color:var(--muted);letter-spacing:.5px}
.nav{display:flex;gap:4px;flex:1}
.nav button{
  padding:8px 16px;border-radius:9px;font-size:13.5px;color:#5B5F66;transition:.15s;
}
.nav button:hover{background:#F0EBE3;color:var(--ink)}
.nav button.on{background:var(--ink);color:#fff}
.stats{display:flex;gap:8px;align-items:center}
button.pill{cursor:pointer}
button.pill:hover{border-color:var(--accent)}
.pill{
  display:inline-block;padding:6px 14px;border-radius:20px;background:#fff;
  border:1px solid var(--line);font-size:13px;color:var(--accent);font-weight:600;
}

/* layout */
#app{max-width:1180px;margin:0 auto;padding:26px 24px}
.view{/* fade removed: rAF keeps virtual time from advancing */}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* hero */
.hero{display:flex;gap:40px;align-items:center;padding:36px 8px 30px}
.hero-txt h1{font-size:34px;line-height:1.42;color:var(--ink);letter-spacing:.5px;font-weight:700}
.hero-txt p{margin-top:14px;color:#6A6E76;font-size:14.5px;line-height:1.8;max-width:520px}
.hero-actions{margin-top:22px;display:flex;gap:12px}
.hero-badge{display:flex;gap:16px;margin-left:auto}
.ring{
  width:104px;height:104px;border-radius:50%;background:#fff;border:1px solid var(--line);
  display:grid;place-content:center;text-align:center;box-shadow:var(--shadow);
}
.ring span{font-size:26px;font-weight:700;color:var(--accent);line-height:1}
.ring small{font-size:11px;color:var(--muted);margin-top:4px}

/* buttons */
.btn{
  padding:11px 22px;border-radius:10px;font-size:14px;transition:.16s;
  border:1px solid var(--line);background:#fff;color:var(--ink);
}
.btn:hover{transform:translateY(-1px);box-shadow:0 6px 18px rgba(31,56,100,.1)}
.btn.primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn.primary:hover{background:#B04F0D}
.btn.ghost{background:transparent}
.btn.small{padding:7px 14px;font-size:12.5px;border-radius:8px}
.btn.back{padding:8px 14px;font-size:13px}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}

.sec-title{font-size:17px;color:var(--ink);margin:18px 0 14px;letter-spacing:1px}
.sec-sub{font-size:15px;color:var(--ink);margin:26px 0 12px}

/* craft cards */
.craft-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.craft-card{
  background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px;
  cursor:pointer;transition:.2s;position:relative;overflow:hidden;
}
.craft-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#DCD4C6}
.craft-card .glyph{
  width:54px;height:54px;border-radius:14px;display:grid;place-items:center;
  font-size:24px;color:#fff;margin-bottom:14px;
}
.craft-card h3{font-size:16.5px;color:var(--ink);margin-bottom:6px}
.craft-card p{font-size:12.5px;color:var(--muted);line-height:1.65}
.craft-card .prog{
  margin-top:14px;height:5px;border-radius:3px;background:#EFEAE1;overflow:hidden;
}
.craft-card .prog i{display:block;height:100%;background:var(--accent);border-radius:3px}
.craft-card .meta{margin-top:8px;font-size:11.5px;color:#A29E96;display:flex;justify-content:space-between}

.tip-line{margin-top:22px;font-size:12px;color:#A8A49C;text-align:center}

/* page head */
.page-head{display:flex;align-items:center;gap:18px;margin-bottom:18px}
.page-head h2{font-size:21px;color:var(--ink);letter-spacing:.5px}
.page-head>div{flex:1}

/* learn / play */
.learn-layout,.play-layout{display:grid;grid-template-columns:1fr 320px;gap:20px;align-items:start}
.stage{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:16px;
  padding:14px;box-shadow:var(--shadow);
}
.stage canvas{width:100%;height:auto;display:block;border-radius:10px;background:#FDFBF7}
.stage-bar{display:flex;align-items:center;gap:10px;margin-top:12px;flex-wrap:wrap}
.seg{display:flex;background:#F2EEE7;border-radius:9px;padding:3px}
.seg button{padding:6px 14px;border-radius:7px;font-size:12.5px;color:#6C7078}
.seg button.on{background:#fff;color:var(--ink);box-shadow:0 1px 4px rgba(0,0,0,.08)}
.speed{display:flex;gap:2px;margin-left:auto;background:#F2EEE7;border-radius:9px;padding:3px}
.speed button{padding:6px 12px;border-radius:7px;font-size:12px;color:#6C7078}
.speed button.on{background:#fff;color:var(--ink);box-shadow:0 1px 4px rgba(0,0,0,.08)}

.side{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;box-shadow:var(--shadow)}
.side h3{font-size:13.5px;color:var(--ink);letter-spacing:1px;margin-bottom:12px}

.card-list{display:flex;flex-direction:column;gap:10px;max-height:520px;overflow:auto}
.kcard{border:1px solid var(--line);border-radius:11px;padding:12px 13px;background:#FDFBF7}
.kcard b{display:block;font-size:13px;color:var(--accent);margin-bottom:5px}
.kcard .kou{font-size:12.5px;color:#4A4E56;line-height:1.7}
.kcard .err{font-size:11.5px;color:#9A968E;margin-top:6px;line-height:1.6}

/* hud */
.hud{position:absolute;left:26px;top:26px;display:flex;flex-direction:column;gap:6px;pointer-events:none}
.hud .row{
  display:flex;gap:8px;align-items:center;font-size:11.5px;color:#5A5E66;
  background:rgba(255,255,255,.86);padding:5px 10px;border-radius:7px;border:1px solid rgba(0,0,0,.04);
}
.hud .row i{display:block;width:58px;height:4px;border-radius:2px;background:#E8E3DA;overflow:hidden}
.hud .row i b{display:block;height:100%;background:var(--ink2);border-radius:2px;transition:width .1s}
.hud .row i b.warn{background:var(--warn)}
.hud .row i b.bad{background:var(--bad)}
.hint{
  position:absolute;left:50%;transform:translateX(-50%);bottom:22px;
  background:rgba(31,56,100,.93);color:#fff;padding:10px 20px;border-radius:10px;
  font-size:13px;opacity:0;transition:.3s;pointer-events:none;max-width:80%;text-align:center;
}
.hint.show{opacity:1}
.hint.l2{background:rgba(197,90,17,.95)}
.hint.l3{background:rgba(163,59,42,.95)}

.metric-list{display:flex;flex-direction:column;gap:9px}
.metric{display:flex;align-items:center;gap:10px;font-size:12.5px;color:#5A5E66}
.metric .name{width:64px;color:#8A8780}
.metric .bar{flex:1;height:6px;background:#EFEAE1;border-radius:3px;overflow:hidden}
.metric .bar i{display:block;height:100%;background:var(--good);border-radius:3px;transition:width .15s}
.metric .bar i.warn{background:var(--warn)}
.metric .bar i.bad{background:var(--bad)}
.metric .val{width:46px;text-align:right;font-variant-numeric:tabular-nums;color:#3A3E45}

.goal-list{display:flex;flex-direction:column;gap:8px;font-size:12.5px;color:#5A5E66}
.goal{display:flex;gap:8px;align-items:flex-start}
.goal b{color:var(--ink)}
.goal .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);margin-top:6px;flex:none}

/* result */
.result-wrap{max-width:820px;margin:0 auto}
.result-head{text-align:center;padding:14px 0 8px}
.stars{font-size:40px;letter-spacing:8px;color:#DCD5C8}
.stars .on{color:#E0A33C}
.result-head h2{font-size:26px;color:var(--ink);margin-top:6px}
.score-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:26px 0}
.score-box{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;text-align:center}
.score-box .k{font-size:12px;color:var(--muted);letter-spacing:2px}
.score-box .v{font-size:30px;font-weight:700;color:var(--ink);margin:6px 0 2px}
.score-box .d{font-size:11.5px;color:#A8A49C}
.diag-list{display:flex;flex-direction:column;gap:10px}
.diag{
  background:#fff;border:1px solid var(--line);border-left:4px solid var(--accent);
  border-radius:10px;padding:14px 16px;
}
.diag .t{font-size:12px;color:var(--muted);margin-bottom:4px}
.diag .m{font-size:13.5px;color:#33373E;line-height:1.7}
.diag .c{font-size:12px;color:var(--accent);margin-top:6px}
.diag.ok{border-left-color:var(--good)}
.diag.ok .c{color:var(--good)}
.result-actions{display:flex;gap:12px;justify-content:center;margin-top:28px}

/* map */
.tabs{display:flex;gap:8px;margin-bottom:16px}
.tabs button{padding:9px 18px;border-radius:10px;background:#fff;border:1px solid var(--line);font-size:13px;color:#5B5F66}
.tabs button.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.level-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.level{
  display:flex;align-items:center;gap:14px;background:#fff;border:1px solid var(--line);
  border-radius:13px;padding:15px 17px;cursor:pointer;transition:.16s;
}
.level:hover{border-color:#DCD4C6;transform:translateY(-1px);box-shadow:var(--shadow)}
.level .no{
  width:36px;height:36px;border-radius:10px;background:#F2EEE7;color:#8A8780;
  display:grid;place-items:center;font-size:13px;font-weight:700;flex:none;
}
.level.done .no{background:var(--good);color:#fff}
.level.lock{opacity:.5;cursor:not-allowed}
.level.lock:hover{transform:none;box-shadow:none;border-color:var(--line)}
.level .txt{flex:1}
.level .txt b{display:block;font-size:14px;color:var(--ink)}
.level .txt small{display:block;font-size:11.5px;color:var(--muted);margin-top:3px}
.level .st{font-size:12px;color:#E0A33C;letter-spacing:2px}
.level .st .off{color:#DCD5C8}

/* museum */
.museum-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.case{background:#fff;border:1px solid var(--line);border-radius:15px;padding:20px}
.case .tag{display:inline-block;font-size:11px;padding:3px 9px;border-radius:6px;background:#FBEFE6;color:var(--accent);margin-bottom:10px}
.case h3{font-size:15.5px;color:var(--ink);margin-bottom:8px}
.case p{font-size:13px;color:#5E626A;line-height:1.75}
.case .q{margin-top:14px;font-size:13px;color:var(--ink);font-weight:600}
.case .opts{display:flex;flex-direction:column;gap:8px;margin-top:10px}
.case .opt{
  text-align:left;padding:10px 13px;border:1px solid var(--line);border-radius:9px;
  font-size:12.5px;color:#4A4E56;background:#FDFBF7;transition:.15s;
}
.case .opt:hover{border-color:var(--accent);background:#fff}
.case .opt.right{background:#EDF4F0;border-color:var(--good);color:var(--good)}
.case .opt.wrong{background:#FAEDEA;border-color:var(--bad);color:var(--bad)}
.case .why{margin-top:12px;font-size:12.5px;color:#6A6E76;line-height:1.7;display:none}
.case .why.show{display:block}

/* me */
.me-layout{display:grid;grid-template-columns:420px 1fr;gap:20px}
.panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;box-shadow:var(--shadow)}
.panel h3{font-size:13.5px;color:var(--ink);letter-spacing:1px;margin-bottom:14px}
.me-stats{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.stat{background:#FDFBF7;border-radius:11px;padding:16px}
.stat .n{font-size:24px;font-weight:700;color:var(--accent)}
.stat .l{font-size:11.5px;color:var(--muted);margin-top:4px}

/* toast */
.toast{
  position:fixed;left:50%;bottom:34px;transform:translate(-50%,20px);
  background:var(--ink);color:#fff;padding:12px 24px;border-radius:11px;font-size:13.5px;
  opacity:0;pointer-events:none;transition:.28s;z-index:99;box-shadow:0 10px 30px rgba(0,0,0,.2);
}
.toast.show{opacity:1;transform:translate(-50%,0)}

@media(max-width:960px){
  .learn-layout,.play-layout,.me-layout{grid-template-columns:1fr}
  .craft-grid{grid-template-columns:1fr}
  .hero{flex-direction:column;align-items:flex-start}
  .hero-badge{margin:10px 0 0}
  .level-list,.museum-list{grid-template-columns:1fr}
}
/* modal */
.modal{position:fixed;inset:0;background:rgba(20,24,32,.55);display:grid;place-items:center;z-index:120;padding:20px}
.modal-box{background:#fff;border-radius:18px;padding:26px;max-width:820px;width:100%;box-shadow:0 30px 80px rgba(0,0,0,.3)}
.modal-box h3{font-size:17px;color:var(--ink);margin-bottom:14px}
.vr-box{max-width:800px}
.vr-box canvas{width:100%;border-radius:12px;background:#FDFBF7;display:block}
.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:16px}
.quiz-q{font-size:15px;color:#2C3038;line-height:1.7;margin-bottom:14px}
.opts{display:flex;flex-direction:column;gap:9px}
.opt{text-align:left;padding:12px 15px;border:1px solid var(--line);border-radius:10px;font-size:13.5px;background:#FDFBF7;transition:.15s}
.opt:hover{border-color:var(--accent);background:#fff}
.opt.right{background:#EDF4F0;border-color:var(--good);color:var(--good)}
.opt.wrong{background:#FAEDEA;border-color:var(--bad);color:var(--bad)}
/* 制作流程 */
.steps{display:flex;flex-direction:column;gap:6px}
.step{display:flex;gap:10px;align-items:flex-start;padding:8px 10px;border-radius:9px;background:#FBF7F0;border:1px solid transparent}
.step b{width:20px;height:20px;border-radius:50%;background:#EDE6DA;color:#9A968E;font-size:11px;display:grid;place-items:center;flex:none;margin-top:1px}
.step span{font-size:12.5px;color:#4A4E56;display:block}
.step i{font-size:11px;color:#A29E96;font-style:normal;display:block;margin-top:2px;line-height:1.5}
.step.on{background:#FBEFE6;border-color:#F0D6C2}
.step.on b{background:var(--accent);color:#fff}
.step.on span{color:var(--accent);font-weight:600}
.step.done b{background:var(--good);color:#fff}
.step.done span{color:#8A8780}

/* 纠错教练 */
.coach-box{max-width:640px}
.coach-head{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.coach-tag{font-size:11px;padding:3px 9px;border-radius:6px;background:#FAE7DC;color:var(--accent);letter-spacing:1px}
.coach-head h3{margin:0;font-size:17px;color:var(--ink)}
.coach-wrong{font-size:13px;color:#8A5A48;line-height:1.7;margin-bottom:12px}
.coach-box canvas{width:100%;border-radius:12px;display:block;background:#FBF7F0}
.coach-cap{font-size:11.5px;color:#A29E96;text-align:center;margin-top:8px}
.coach-right{font-size:13.5px;color:#2C3038;line-height:1.8;margin-top:10px;padding:12px 14px;background:#F4F8F5;border-radius:10px;border-left:3px solid var(--good)}