@font-face{font-family:"Source Han Sans";src:url('/fonts/SourceHanSansCN-Regular.otf') format('opentype');font-display:swap;font-weight:100 900}
:root{--ink:#24211e;--muted:#746e67;--paper:#f4f0e8;--paper-deep:#e9e1d4;--card:#fffdf8;--red:#b92d20;--red-dark:#812019;--sage:#6b806b;--line:#d9d0c3;--shadow:0 22px 70px rgba(58,44,30,.12);--radius:24px}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{background:var(--paper);color:var(--ink);font-family:"Source Han Sans";scroll-behavior:smooth}
body{margin:0;min-width:320px;min-height:100vh;background:radial-gradient(circle at 14% 8%,rgba(185,45,32,.09),transparent 28%),linear-gradient(120deg,rgba(255,255,255,.55),transparent 40%),var(--paper);overflow-x:hidden}
button,input{font:inherit}button{color:inherit}button:focus-visible,input:focus-visible{outline:3px solid rgba(185,45,32,.28);outline-offset:3px}
button{cursor:pointer}.noscript{padding:24px;background:#fff0e8;color:#8a1c10;text-align:center}.eyebrow,.card-kicker,.rail-label{font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--red);font-weight:700}
.landing-page{min-height:100vh;-webkit-user-select:none;user-select:none}.landing-page input{-webkit-user-select:text;user-select:text}.login-shell{min-height:100vh;display:grid;grid-template-columns:minmax(0,1.25fr) minmax(420px,.75fr);position:relative;isolation:isolate}
.login-story{position:relative;padding:7vh 7vw 6vh;display:flex;flex-direction:column;justify-content:center;overflow:hidden;border-right:1px solid rgba(82,68,52,.14)}
.login-story:before{content:"";position:absolute;inset:6%;background-image:linear-gradient(rgba(86,71,53,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(86,71,53,.055) 1px,transparent 1px);background-size:44px 44px;mask-image:linear-gradient(to bottom,transparent,#000 25%,#000 75%,transparent);z-index:-2}
.brand-mark{display:flex;align-items:center;gap:12px;position:absolute;top:42px;left:7vw}.brand-mark span{display:grid;place-items:center;width:48px;height:48px;border:2px solid var(--red);border-radius:50%;font-family:"Source Han Sans";font-size:26px;color:var(--red);transform:rotate(-6deg)}.brand-mark i{font-style:normal;font-size:15px;letter-spacing:.2em}
.login-story h1{font-family:"Source Han Sans";font-size:clamp(46px,5.6vw,88px);line-height:1.08;letter-spacing:-.04em;margin:18px 0 28px;max-width:920px;font-weight:700}.login-lead{max-width:680px;font-size:18px;line-height:1.9;color:#5f5952;margin:0}.method-ribbon{display:flex;align-items:center;gap:14px;margin-top:36px;color:var(--red-dark);font-size:15px}.method-ribbon span{padding:8px 15px;border:1px solid rgba(185,45,32,.28);border-radius:999px;background:rgba(255,253,248,.65)}.method-ribbon b{font-weight:400;color:#a59a8d}
.constellation{position:absolute;right:4%;bottom:4%;width:290px;height:210px;opacity:.8}.constellation:before{content:"";position:absolute;inset:15px;background:conic-gradient(from 20deg,transparent 0 8%,rgba(185,45,32,.2) 8% 9%,transparent 9% 21%,rgba(185,45,32,.2) 21% 22%,transparent 22% 100%);border:1px dashed rgba(185,45,32,.22);border-radius:50%;transform:rotate(-8deg)}.constellation span{position:absolute;left:var(--x);top:var(--y);width:34px;height:34px;display:grid;place-items:center;border-radius:50%;background:var(--card);border:1px solid rgba(185,45,32,.35);color:var(--red);font-family:"Source Han Sans";box-shadow:0 8px 20px rgba(74,49,30,.1)}
.login-panel{display:grid;place-items:center;padding:48px;background:rgba(255,253,248,.72);backdrop-filter:blur(18px)}.login-card{width:min(420px,100%);padding:42px;background:rgba(255,255,255,.75);border:1px solid rgba(116,104,88,.16);border-radius:28px;box-shadow:var(--shadow)}.login-card h2{font-family:"Source Han Sans";font-size:32px;margin:10px 0 8px}.login-card>p:not(.card-kicker){color:var(--muted)}.login-card form{display:grid;gap:18px;margin-top:32px}.login-card label{font-size:13px;color:#625b53;display:grid;gap:8px}.login-card input{width:100%;border:1px solid #d8cfc3;background:#fffdf9;border-radius:13px;padding:14px 15px;font-size:16px;color:var(--ink);transition:.2s}.login-card input:focus{border-color:var(--red);box-shadow:0 0 0 4px rgba(185,45,32,.08);outline:none}.primary-button{border:0;border-radius:14px;background:var(--red);color:#fff;padding:15px 18px;display:flex;align-items:center;justify-content:space-between;font-weight:700;box-shadow:0 10px 24px rgba(185,45,32,.22);transition:.2s}.primary-button:hover{transform:translateY(-2px);background:var(--red-dark)}.primary-button i{font-style:normal;font-size:20px}.privacy-note{font-size:12px;line-height:1.7;margin-top:22px}.form-error{min-height:20px;margin:0!important;color:var(--red)!important;font-size:13px}
.app-shell{min-height:100vh}.topbar{height:76px;display:flex;align-items:center;justify-content:space-between;padding:0 28px;border-bottom:1px solid rgba(92,78,61,.14);background:rgba(250,247,241,.86);backdrop-filter:blur(18px);position:sticky;top:0;z-index:50}.wordmark{display:grid;grid-template-columns:auto auto;grid-template-rows:auto auto;column-gap:11px;border:0;background:none;text-align:left;padding:0}.wordmark span{grid-row:1/3;width:40px;height:40px;border-radius:50%;border:2px solid var(--red);display:grid;place-items:center;color:var(--red);font-family:"Source Han Sans";font-size:22px}.wordmark strong{font-family:"Source Han Sans";font-size:18px}.wordmark small{font-size:10px;color:var(--muted);letter-spacing:.08em}.top-actions{display:flex;align-items:center;gap:10px}.soft-button,.icon-button{border:1px solid rgba(80,68,53,.14);background:rgba(255,255,255,.65);border-radius:999px;padding:9px 14px}.soft-button:hover,.icon-button:hover{background:#fff}.icon-button{width:40px;height:40px;padding:0}.user-chip{display:flex;align-items:center;gap:10px;margin-left:8px}.user-chip>span{width:38px;height:38px;border-radius:12px;background:var(--ink);color:#fff;display:grid;place-items:center}.user-chip div{display:grid}.user-chip strong{font-size:13px}.user-chip small{font-size:10px;color:var(--muted)}
.workspace{display:grid;grid-template-columns:168px minmax(0,1fr);min-height:calc(100vh - 76px)}.family-rail{padding:30px 18px;border-right:1px solid rgba(92,78,61,.12);background:rgba(236,229,218,.5);position:sticky;top:76px;height:calc(100vh - 76px);display:flex;flex-direction:column}.rail-label{padding-left:10px;color:var(--muted)}.family-nav{display:grid;gap:8px;margin-top:18px}.family-button{border:0;background:transparent;border-radius:16px;padding:10px;display:grid;grid-template-columns:38px 1fr;align-items:center;text-align:left;gap:10px;transition:.2s}.family-button:hover{background:rgba(255,255,255,.65)}.family-button.active{background:var(--card);box-shadow:0 8px 28px rgba(68,52,35,.1)}.family-button .family-glyph{width:38px;height:38px;border-radius:13px;background:var(--family-color);color:#fff;display:grid;place-items:center;font-family:"Source Han Sans";font-size:18px}.family-button strong{display:block;font-size:13px}.family-button small{display:block;color:var(--muted);font-size:10px;margin-top:2px}.rail-stat{margin-top:auto;padding:14px 12px;border-top:1px solid var(--line);display:grid;grid-template-columns:auto 1fr;align-items:end}.rail-stat span{font-family:"Source Han Sans";font-size:30px;color:var(--red)}.rail-stat small{font-size:10px;color:var(--muted);padding:0 0 5px 5px}.rail-stat b{grid-column:1/3;font-size:10px;color:#a69c90;font-weight:400}
.content-stage{padding:36px clamp(24px,4vw,64px) 70px;min-width:0}.stage-head{display:flex;justify-content:space-between;gap:30px;align-items:end}.stage-head h1{font-family:"Source Han Sans";font-size:clamp(42px,5vw,72px);margin:4px 0 8px;line-height:1}.stage-description{margin:0;color:var(--muted)}.search-box{width:min(340px,34vw);height:46px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.7);display:flex;align-items:center;padding:0 15px;gap:9px}.search-box input{border:0;background:transparent;outline:0;width:100%}.search-results{margin-top:22px;background:var(--card);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:10px;max-height:420px;overflow:auto}.search-result{width:100%;border:0;background:transparent;padding:12px 14px;border-radius:12px;display:flex;align-items:center;justify-content:space-between;text-align:left}.search-result:hover{background:var(--paper)}.search-result strong{font-size:14px}.search-result small{color:var(--muted)}
.map-view{position:relative;margin-top:34px;display:grid;grid-template-columns:minmax(310px,.82fr) minmax(480px,1.18fr);gap:52px;align-items:start}.map-spine{position:absolute;left:41%;top:10%;bottom:6%;width:1px;background:linear-gradient(var(--red),rgba(185,45,32,.05));transform:rotate(3deg)}.map-spine:before,.map-spine:after{content:"";position:absolute;left:-5px;width:11px;height:11px;background:var(--red);border-radius:50%}.map-spine:after{bottom:0;background:var(--paper);border:2px solid var(--red)}
.overview-card,.level2-visual{border:0;background:var(--card);padding:0;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);position:sticky;top:112px;text-align:left}.overview-card img,.level2-visual img{display:block;width:100%;aspect-ratio:16/9;object-fit:contain;background:#fff}.overview-caption{display:flex;align-items:end;justify-content:space-between;padding:17px 20px}.overview-caption small{color:var(--muted)}.overview-caption strong{font-family:"Source Han Sans";font-size:22px;color:var(--red)}.level2-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.level2-card{border:1px solid rgba(92,78,61,.12);border-radius:18px;background:rgba(255,253,248,.82);padding:17px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:14px;text-align:left;min-height:94px;transition:.22s}.level2-card:hover{transform:translateX(5px);border-color:rgba(185,45,32,.35);box-shadow:0 14px 30px rgba(72,52,31,.09)}.level2-card .num{font-family:"Source Han Sans";color:var(--red);font-size:24px}.level2-card strong{display:block}.level2-card small{color:var(--muted);font-size:11px}.level2-card .arrow{color:#b0a69a}
.back-button{border:0;background:none;color:var(--red);padding:8px 0;margin-bottom:20px}.browser-layout{display:grid;grid-template-columns:minmax(360px,.9fr) minmax(450px,1.1fr);gap:28px;align-items:start}.level2-visual{position:sticky}.level2-visual span{display:block;padding:14px 18px;color:var(--muted);font-size:12px}.scene-list-panel{background:rgba(255,253,248,.76);border:1px solid rgba(92,78,61,.12);border-radius:var(--radius);padding:20px}.scene-list-head{display:flex;align-items:end;justify-content:space-between;padding:4px 6px 17px;border-bottom:1px solid var(--line)}.scene-list-head p{margin:0;color:var(--red);font-size:10px;letter-spacing:.2em}.scene-list-head h2{margin:2px 0 0;font-family:"Source Han Sans";font-size:28px}.scene-list-head>span{color:var(--muted);font-size:11px}.scene-list{display:grid;gap:4px;margin-top:8px}.scene-item{border:0;background:transparent;border-radius:13px;padding:11px 10px;display:grid;grid-template-columns:36px 1fr auto;gap:10px;align-items:center;text-align:left}.scene-item:hover{background:#f3ede4}.scene-item.done .scene-index{background:var(--sage);color:#fff}.scene-index{width:34px;height:34px;border:1px solid var(--line);border-radius:10px;display:grid;place-items:center;font-family:"Source Han Sans"}.scene-item strong{font-size:14px}.scene-item small{display:block;color:var(--muted);font-size:10px;margin-top:2px}.scene-item .listen{color:var(--red);font-size:12px}
.protected-visual{-webkit-user-select:none;user-select:none}.protected-visual img{-webkit-user-drag:none;user-drag:none;pointer-events:none}#sceneImage{pointer-events:auto}
dialog{border:0;padding:0;background:transparent;max-width:none;max-height:none}dialog::backdrop{background:rgba(28,24,20,.68);backdrop-filter:blur(8px)}.scene-dialog,.guide-dialog,.progress-dialog{width:100vw;height:100vh}.dialog-frame{width:min(1500px,96vw);height:94vh;margin:3vh auto;background:#ebe5dc;border-radius:26px;display:grid;grid-template-rows:auto minmax(0,1fr) auto auto;overflow:hidden;box-shadow:0 32px 100px rgba(0,0,0,.28)}.dialog-head{display:flex;align-items:center;justify-content:space-between;padding:18px 24px;border-bottom:1px solid rgba(81,68,54,.14);background:rgba(255,253,248,.92)}.dialog-head p{margin:0;color:var(--red);font-size:10px;letter-spacing:.12em}.dialog-head h2{font-family:"Source Han Sans";margin:3px 0 0;font-size:24px}.close-button{border:1px solid var(--line);background:#fff;border-radius:50%;font-size:24px;width:42px;height:42px}.scene-canvas{position:relative;display:grid;place-items:center;overflow:auto;background:#d9d1c5;padding:18px}.scene-canvas img{display:block;max-width:100%;max-height:100%;object-fit:contain;box-shadow:0 14px 46px rgba(38,31,25,.18);background:#fff}.image-loading{position:absolute;color:var(--muted)}.audio-console{padding:14px 24px;background:#fffdf8;display:flex;gap:14px;align-items:center;border-top:1px solid var(--line)}.play-button{border:0;width:48px;height:48px;border-radius:50%;background:var(--red);color:#fff;display:grid;place-items:center;flex:0 0 auto}.audio-main{display:grid;gap:8px;flex:1}.audio-label{display:flex;justify-content:space-between;font-size:12px}.audio-label span{color:var(--muted)}input[type=range]{width:100%;accent-color:var(--red)}.speed-button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 12px}.audio-console audio,.guide-audio audio{display:none}.dialog-foot{padding:13px 24px;background:#fffdf8;border-top:1px solid var(--line);display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:18px}.dialog-foot>button{border:0;background:none;color:var(--red);padding:9px}.dialog-foot>button:disabled{opacity:.3}.word-chips{display:flex;justify-content:center;gap:6px;flex-wrap:wrap}.word-chips span{font-family:"Source Han Sans";font-size:12px;padding:4px 8px;border:1px solid var(--line);border-radius:999px;background:#f7f2ea}
dialog{border:0;padding:0;background:transparent;max-width:none;max-height:none}dialog::backdrop{background:rgba(28,24,20,.68);backdrop-filter:blur(8px)}.scene-dialog,.guide-dialog,.progress-dialog{width:100vw;height:100vh}.dialog-frame{width:min(1600px,98vw);height:98vh;margin:1vh auto;background:#ebe5dc;border-radius:22px;display:grid;grid-template-rows:auto minmax(0,1fr) auto auto;overflow:hidden;box-shadow:0 32px 100px rgba(0,0,0,.28)}.dialog-head{display:flex;align-items:center;justify-content:space-between;padding:13px 20px;border-bottom:1px solid rgba(81,68,54,.14);background:rgba(255,253,248,.92)}.dialog-head p{margin:0;color:var(--red);font-size:10px;letter-spacing:.12em}.dialog-head h2{font-family:"Source Han Sans";margin:3px 0 0;font-size:22px}.close-button{border:1px solid var(--line);background:#fff;border-radius:50%;font-size:24px;width:42px;height:42px}.scene-head-actions{display:flex;align-items:center;gap:12px}.scene-zoom-tools{display:flex;align-items:center;padding:4px;border:1px solid rgba(81,68,54,.15);border-radius:999px;background:#f3ede5;box-shadow:inset 0 1px 0 rgba(255,255,255,.8)}.scene-zoom-tools button{height:34px;min-width:38px;border:0;border-radius:999px;background:transparent;color:var(--ink);font-family:"Source Han Sans";font-size:17px}.scene-zoom-tools button:hover:not(:disabled){background:#fff}.scene-zoom-tools button:disabled{opacity:.28}.scene-zoom-tools #zoomFit{min-width:88px;padding:0 13px;font-size:11px;color:var(--muted)}.scene-zoom-tools #zoomFit.active{background:#fff;color:var(--red);box-shadow:0 3px 10px rgba(66,51,38,.08)}.scene-canvas{position:relative;display:block;overflow:auto;background:#d9d1c5;padding:0;scrollbar-width:none;overscroll-behavior:contain}.scene-canvas::-webkit-scrollbar{display:none}.scene-image-stage{display:grid;place-items:center;min-width:100%;min-height:100%;transition:width .18s ease,height .18s ease}.scene-canvas img{display:block;max-width:none;max-height:none;object-fit:contain;box-shadow:0 14px 46px rgba(38,31,25,.18);background:#fff;transition:width .18s ease,height .18s ease;cursor:zoom-in}.scene-canvas.zoomed{touch-action:none}.scene-canvas.zoomed,.scene-canvas.zoomed img{cursor:grab}.scene-canvas.dragging,.scene-canvas.dragging img{cursor:grabbing}.zoom-hint{position:sticky;left:50%;bottom:12px;transform:translateX(-50%);width:max-content;max-width:calc(100% - 24px);margin-top:-38px;padding:7px 12px;border-radius:999px;background:rgba(37,32,28,.7);color:rgba(255,255,255,.82);font-size:10px;pointer-events:none;backdrop-filter:blur(8px)}.image-loading{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);color:var(--muted)}.audio-console{padding:11px 20px;background:#fffdf8;display:flex;gap:14px;align-items:center;border-top:1px solid var(--line)}.play-button{border:0;width:44px;height:44px;border-radius:50%;background:var(--red);color:#fff;display:grid;place-items:center;flex:0 0 auto}.audio-main{display:grid;gap:7px;flex:1}.audio-label{display:flex;justify-content:space-between;font-size:12px}.audio-label span{color:var(--muted)}input[type=range]{width:100%;accent-color:var(--red)}.speed-button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 12px}.audio-console audio,.guide-audio audio{display:none}.dialog-foot{padding:9px 20px;background:#fffdf8;border-top:1px solid var(--line);display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:18px}.dialog-foot>button{border:0;background:none;color:var(--red);padding:7px}.dialog-foot>button:disabled{opacity:.3}.word-chips{display:flex;justify-content:center;gap:6px;flex-wrap:wrap}.word-chips span{font-family:"Source Han Sans";font-size:11px;padding:3px 7px;border:1px solid var(--line);border-radius:999px;background:#f7f2ea}
.guide-frame,.progress-frame{width:min(980px,92vw);max-height:90vh;margin:5vh auto;background:var(--card);border-radius:26px;overflow:auto;box-shadow:0 32px 100px rgba(0,0,0,.28)}.guide-content{padding:28px}.guide-intro{font-family:"Source Han Sans";font-size:22px;line-height:1.7;margin:0 0 24px}.guide-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.guide-step{padding:20px 16px;border-radius:18px;background:var(--paper);border-top:3px solid var(--red)}.guide-step span{font-family:"Source Han Sans";color:var(--red);font-size:26px}.guide-step h3{margin:8px 0 6px}.guide-step p{font-size:12px;color:var(--muted);line-height:1.7;margin:0}.guide-principles{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:18px}.guide-principle{padding:17px;border:1px solid var(--line);border-radius:16px}.guide-principle strong{font-family:"Source Han Sans"}.guide-principle p{font-size:12px;color:var(--muted);line-height:1.7}.guide-audio{display:flex;align-items:center;gap:14px;padding:18px 28px;border-top:1px solid var(--line);background:#f6f0e7}.guide-audio div{display:grid}.guide-audio small{color:var(--muted)}.progress-frame{width:min(720px,90vw)}#progressContent{padding:28px}.progress-total{display:flex;align-items:end;gap:10px}.progress-total strong{font-family:"Source Han Sans";font-size:62px;color:var(--red)}.progress-bars{display:grid;gap:14px;margin-top:26px}.progress-row{display:grid;grid-template-columns:80px 1fr 70px;gap:12px;align-items:center}.progress-track{height:8px;border-radius:999px;background:var(--paper-deep);overflow:hidden}.progress-fill{height:100%;background:var(--red);border-radius:inherit}
.trace-layer{position:fixed;inset:0;z-index:99999;pointer-events:none;overflow:hidden;display:none}.trace-layer.active{display:block}.trace-stamp{position:absolute;left:var(--x);top:var(--y);transform:translate(-50%,-50%) rotate(var(--r));color:#6d302b;opacity:.085;font-size:clamp(11px,1.15vw,18px);font-weight:500;white-space:nowrap;letter-spacing:.05em;transition:left 1.2s ease,top 1.2s ease,transform 1.2s ease}.privacy-shield{position:fixed;inset:0;z-index:100000;background:#24211e;color:#fff;display:grid;place-content:center;text-align:center;gap:8px}.privacy-shield[hidden]{display:none}.privacy-shield strong{font-family:"Source Han Sans";font-size:34px}.privacy-shield span{color:#b9afa5}.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,20px);opacity:0;z-index:100001;background:#24211e;color:#fff;padding:11px 18px;border-radius:999px;font-size:12px;transition:.25s}.toast.show{opacity:1;transform:translate(-50%,0)}
@media(max-width:1050px){.login-shell{grid-template-columns:1fr}.login-story{min-height:58vh;border-right:0}.login-panel{padding:32px}.constellation{opacity:.35}.workspace{grid-template-columns:92px 1fr}.family-rail{padding:24px 10px}.family-button{grid-template-columns:1fr;justify-items:center}.family-button div:last-child,.rail-label{display:none}.rail-stat{display:none}.map-view,.browser-layout{grid-template-columns:1fr}.map-spine{display:none}.overview-card,.level2-visual{position:relative;top:auto}.guide-steps{grid-template-columns:repeat(2,1fr)}}
@media(max-width:720px){.login-story{padding:100px 26px 45px}.brand-mark{left:26px;top:28px}.login-story h1{font-size:42px}.constellation{display:none}.method-ribbon{flex-wrap:wrap}.login-panel{padding:20px}.login-card{padding:28px}.topbar{padding:0 14px}.wordmark small,.soft-button,.user-chip div{display:none}.workspace{display:block}.family-rail{position:sticky;top:76px;z-index:20;width:100%;height:auto;border-right:0;border-bottom:1px solid var(--line);padding:8px;overflow-x:auto}.family-nav{display:flex;margin:0}.family-button{min-width:58px;padding:6px}.family-button .family-glyph{width:36px;height:36px}.content-stage{padding:24px 16px 60px}.stage-head{display:grid}.search-box{width:100%}.level2-grid{grid-template-columns:1fr}.overview-card{width:100%}.dialog-frame{width:100vw;height:100vh;margin:0;border-radius:0}.dialog-foot{grid-template-columns:auto auto;justify-content:space-between}.word-chips{grid-column:1/3;grid-row:1}.guide-steps,.guide-principles{grid-template-columns:1fr}.scene-dialog-head{padding:8px 10px}.scene-dialog-head h2{font-size:16px}.scene-dialog-head p{max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.scene-head-actions{gap:6px}.scene-zoom-tools{padding:2px}.scene-zoom-tools button{height:30px;min-width:32px}.scene-zoom-tools #zoomFit{min-width:70px;padding:0 8px}.close-button{width:36px;height:36px}.zoom-hint{bottom:7px}.audio-console{padding:9px 10px}.dialog-head{padding:14px}.progress-row{grid-template-columns:65px 1fr 55px}}
@media print{body>*{display:none!important}body:after{content:"受版权保护的学习内容禁止打印";display:grid;place-items:center;height:100vh;font-size:28px}}

/* Public course introduction and selection protection */
.app-shell{min-height:100vh;-webkit-user-select:none;user-select:none}.app-shell input{-webkit-user-select:text;user-select:text}.primary-button:disabled{opacity:.7;cursor:wait;transform:none}
.public-notice-card{width:min(470px,100%);margin-bottom:14px;border:1px solid rgba(166,58,43,.2);background:#fff9f2;padding:14px 16px;text-align:left;display:grid;grid-template-columns:1fr auto;gap:3px 12px;border-radius:8px;color:var(--ink)}.public-notice-card[hidden]{display:none}.public-notice-card small{grid-column:1/3;color:var(--red);font-size:9px;letter-spacing:.12em}.public-notice-card strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.public-notice-card span{font-size:10px;color:var(--muted)}.public-notice-card.urgent{border-color:#b3261e;background:#fff0ee}.public-notice-card.important{border-color:#b88a45;background:#fff8e8}.user-chip{border:0;background:transparent;padding:0;text-align:left;cursor:pointer}.user-chip:hover strong{color:var(--red)}.notice-button{display:flex;gap:6px;align-items:center}.notice-button b{min-width:18px;height:18px;padding:0 5px;border-radius:999px;background:var(--red);color:#fff;display:grid;place-items:center;font-size:9px}.member-notice-bar{position:sticky;top:76px;z-index:45;background:#f7efe4;border-bottom:1px solid #e2d4c3}.member-notice-bar[hidden]{display:none}.member-notice-bar button{width:100%;border:0;background:transparent;padding:9px 28px;display:flex;align-items:center;gap:12px;text-align:left}.member-notice-bar small{color:var(--red);font-size:9px;letter-spacing:.1em}.member-notice-bar strong{font-size:12px;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.member-notice-bar span{font-size:10px;color:var(--muted)}.member-notice-bar.urgent{background:#fff0ee}.member-notice-bar.important{background:#fff8e8}.notice-dialog,.account-dialog{border:0;padding:0;background:transparent}.notice-dialog::backdrop,.account-dialog::backdrop{background:rgba(22,19,16,.68);backdrop-filter:blur(5px)}.notice-frame,.account-frame{width:min(620px,calc(100vw - 28px));max-height:86vh;overflow:auto;background:#fffdf8;box-shadow:0 24px 70px rgba(45,35,24,.2)}.notice-list{padding:4px 26px 28px;display:grid;gap:10px}.notice-item{border-left:3px solid #a69d91;background:#f7f2ea;padding:16px}.notice-item.important{border-color:#b88a45}.notice-item.urgent{border-color:#b3261e;background:#fff3f1}.notice-item small{color:var(--muted);font-size:9px}.notice-item h3{margin:5px 0 8px;font-size:17px}.notice-item p{margin:0;white-space:pre-wrap;line-height:1.75;font-size:12px}.notice-empty{padding:35px;text-align:center;color:var(--muted)}.account-details{padding:4px 26px 15px;display:grid;grid-template-columns:1fr 1fr;gap:9px}.account-details>div{background:#f2ece3;padding:14px;min-width:0}.account-details small{display:block;color:var(--muted);font-size:9px;margin-bottom:5px}.account-details strong{font-size:13px;word-break:break-word}.account-note{margin:0 26px 28px;color:var(--muted);font-size:10px}@media(max-width:720px){.public-notice-card{margin-bottom:10px}.member-notice-bar{top:64px}.member-notice-bar button{padding:8px 14px}.member-notice-bar span{display:none}.account-details{grid-template-columns:1fr}.notice-frame,.account-frame{width:100vw;height:100vh;max-height:none}.notice-button{display:none!important}.user-chip{margin-left:0}}
.promise-section,.family-preview-section,.method-section{padding:110px clamp(28px,8vw,140px)}
.section-heading{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(280px,.65fr);gap:42px;align-items:end}.section-heading .eyebrow{grid-column:1/3;margin:0}.section-heading h2{font-family:"Source Han Sans";font-size:clamp(38px,4.6vw,68px);line-height:1.16;letter-spacing:-.035em;margin:10px 0 0}.section-heading>p:last-child{color:var(--muted);line-height:1.9;margin:0}
.course-numbers{display:grid;grid-template-columns:repeat(4,1fr);margin-top:66px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.course-numbers article{padding:34px 26px;border-right:1px solid var(--line);display:grid}.course-numbers article:last-child{border-right:0}.course-numbers strong{font-family:"Source Han Sans";font-size:clamp(44px,5vw,74px);color:var(--red);line-height:1}.course-numbers span{font-weight:700;margin-top:12px}.course-numbers small{color:var(--muted);margin-top:5px}
.family-preview-section{background:#292622;color:#fff}.section-heading.compact{display:block}.section-heading.compact h2{max-width:900px}.family-preview-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:10px;margin-top:58px}.family-preview-grid article{min-height:220px;padding:18px 14px;background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.1);border-radius:70px 70px 18px 18px;display:flex;flex-direction:column;align-items:center;justify-content:space-between;text-align:center;transition:.25s}.family-preview-grid article:hover{background:var(--tone);transform:translateY(-8px)}.family-preview-grid b{width:76px;height:76px;border-radius:50%;display:grid;place-items:center;background:var(--tone);font-family:"Source Han Sans";font-size:27px}.family-preview-grid div{display:grid;gap:5px}.family-preview-grid span{font-size:10px;color:rgba(255,255,255,.62)}
.method-section{display:grid;grid-template-columns:.78fr 1.22fr;gap:clamp(50px,8vw,130px);background:linear-gradient(135deg,#eee5d7,#f9f6ef)}.method-copy h2{font-family:"Source Han Sans";font-size:clamp(44px,5.4vw,78px);line-height:1.08;margin:14px 0 26px}.method-copy>p:last-child{color:var(--muted);line-height:1.9;max-width:520px}.method-steps-public{list-style:none;padding:0;margin:0;border-top:1px solid #cfc4b5}.method-steps-public li{display:grid;grid-template-columns:65px 1fr;gap:20px;padding:25px 6px;border-bottom:1px solid #cfc4b5}.method-steps-public li>span{font-family:"Source Han Sans";font-size:28px;color:var(--red)}.method-steps-public strong{font-family:"Source Han Sans";font-size:22px}.method-steps-public p{margin:5px 0 0;color:var(--muted);line-height:1.7}
.landing-footer{padding:34px clamp(28px,8vw,140px);display:flex;align-items:center;gap:22px;background:#1e1c19;color:#fff}.landing-footer span{font-family:"Source Han Sans";color:#e46e5c;font-size:20px}.landing-footer p{color:#9e978f;font-size:12px}.landing-footer a{margin-left:auto;color:#fff;text-decoration:none;font-size:12px}
@media(max-width:1050px){.section-heading,.method-section{grid-template-columns:1fr}.section-heading .eyebrow{grid-column:auto}.course-numbers{grid-template-columns:repeat(2,1fr)}.course-numbers article:nth-child(2){border-right:0}.family-preview-grid{grid-template-columns:repeat(4,1fr)}}
@media(max-width:720px){.promise-section,.family-preview-section,.method-section{padding:72px 24px}.course-numbers{grid-template-columns:1fr 1fr}.course-numbers article{padding:24px 14px}.family-preview-grid{grid-template-columns:repeat(2,1fr)}.family-preview-grid article:last-child{grid-column:1/3}.landing-footer{align-items:flex-start;flex-direction:column}.landing-footer a{margin-left:0}}

/* Scene viewer sizing is controlled in app.js so fit and zoom stay pixel-sharp. */
.scene-canvas{min-width:0;min-height:0}.scene-canvas img{max-width:none;max-height:none}

/* Learning-method flow and protected video. */
.guide-core-rule{margin:0 0 22px;padding:18px 20px;border-left:4px solid var(--red);background:#f5eee4;border-radius:0 14px 14px 0}.guide-core-rule strong{color:var(--red)}.guide-core-rule p{margin:7px 0 0;line-height:1.8;color:#514a43}.guide-step em{display:block;margin-top:12px;padding-top:10px;border-top:1px dashed var(--line);font-style:normal;font-size:11px;line-height:1.65;color:var(--red-dark)}.guide-review{display:grid;grid-template-columns:.65fr 1.35fr;gap:24px;margin-top:20px;padding:22px;border-radius:18px;background:#292622;color:#fff}.guide-review small{letter-spacing:.18em;color:#d88b7c}.guide-review h3{margin:6px 0 0}.guide-review ol{margin:0;padding-left:22px;display:grid;gap:8px;color:#ddd5cb;font-size:13px;line-height:1.6}.guide-video-wrap{padding:18px 28px 28px;border-top:1px solid var(--line);background:#eee7dc}.guide-video-label{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.guide-video-label small{color:var(--muted)}.guide-video-wrap video{display:block;width:100%;max-height:58vh;background:#161513;border-radius:16px;object-fit:contain}
.guide-download{margin:0 28px 28px;padding:20px 22px;border:1px solid rgba(185,45,32,.22);border-radius:18px;background:linear-gradient(120deg,#fffaf4,#f3e7d9);display:flex;align-items:center;justify-content:space-between;gap:24px}.guide-download div{display:grid;gap:4px}.guide-download small{font-size:9px;letter-spacing:.18em;color:var(--red)}.guide-download strong{font-family:"Source Han Sans";font-size:16px}.guide-download p{margin:0;color:var(--muted);font-size:11px}.guide-download a{flex:0 0 auto;display:flex;align-items:center;gap:12px;padding:12px 17px;border-radius:999px;background:var(--red);color:#fff;text-decoration:none;font-size:12px;box-shadow:0 9px 22px rgba(185,45,32,.2)}.guide-download a:hover{background:var(--red-dark);transform:translateY(-1px)}.guide-download a span{font-size:17px}
@media(max-width:720px){.scene-canvas{padding:0}.scene-canvas img{max-width:none;max-height:none}.guide-review{grid-template-columns:1fr}.guide-download{margin:0 12px 18px;align-items:stretch;flex-direction:column}.guide-download a{justify-content:center}.guide-video-wrap{padding:12px}.guide-video-wrap video{max-height:42vh}}

/* Pure-text brand logo: no circular emblem. */
.brand-mark{display:grid;gap:3px;align-items:start}.brand-mark strong{font-family:"Source Han Sans";font-size:31px;line-height:1;color:var(--red);font-weight:800;letter-spacing:.12em}.brand-mark small{font-size:10px;color:var(--muted);letter-spacing:.08em}
.wordmark{display:grid;grid-template-columns:auto;grid-template-rows:auto auto;gap:1px}.wordmark strong{font-family:"Source Han Sans";font-size:24px;line-height:1.1;color:var(--red);font-weight:800;letter-spacing:.1em}.wordmark small{font-size:10px;color:var(--muted);letter-spacing:.06em}
@media(max-width:720px){.brand-mark strong{font-size:27px}.wordmark strong{font-size:21px}.wordmark small{display:none}}

/* Word-memory cards: protected image + memory-method narration. */
.word-chip{font-family:"Source Han Sans";font-size:11px;padding:4px 9px;border:1px solid var(--line);border-radius:999px;background:#f7f2ea;color:var(--ink);transition:.18s}.word-chip:hover:not(:disabled){border-color:rgba(185,45,32,.45);background:#fff;color:var(--red);transform:translateY(-1px)}.word-chip.unavailable{opacity:.42;text-decoration:line-through;cursor:not-allowed}
.word-dialog{width:100vw;width:100dvw;height:100vh;height:100dvh;margin:0;overflow:hidden}.word-frame{width:min(1680px,100vw);width:min(1680px,100dvw);height:100vh;height:100dvh;margin:0 auto;border-radius:0;overflow:hidden;background:#ebe5dc;display:grid;grid-template-rows:auto minmax(0,1fr) auto auto;box-shadow:0 36px 110px rgba(0,0,0,.36)}.word-dialog-head{min-height:52px;padding:7px 16px}.word-dialog-head h2{font-size:19px;margin-top:1px}.word-dialog-head .close-button{width:36px;height:36px;font-size:21px}.word-dialog-head p{max-width:76vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.word-image-wrap{position:relative;min-width:0;min-height:0;overflow:hidden;background:radial-gradient(circle at 50% 45%,#fff 0,#f5f0e8 72%,#ded5c8 100%)}.word-image-wrap img{position:absolute;inset:4px;display:block;width:calc(100% - 8px);height:calc(100% - 8px);object-fit:contain;object-position:center;background:#fff;box-shadow:0 10px 34px rgba(49,39,31,.11)}.word-audio-console{min-height:58px;padding:7px 16px;background:#fffdf8;display:flex;gap:12px;align-items:center;border-top:1px solid var(--line)}.word-audio-console .play-button{width:40px;height:40px}.word-audio-console audio{display:none}.word-nav{min-height:48px;padding:4px 16px;background:#292622;color:#fff;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px}.word-nav>button{border:0;background:transparent;color:#f1ddd8;padding:6px 10px}.word-nav>button:last-child{text-align:right}.word-nav>button:hover:not(:disabled){color:#fff}.word-nav>button:disabled{opacity:.28}.word-nav div{display:grid;justify-items:center;min-width:110px}.word-nav strong{font-family:"Source Han Sans";font-size:13px;color:#fff}.word-nav small{font-size:9px;color:#a9a198;letter-spacing:.08em;margin-top:1px}
@media(max-width:720px){.word-dialog-head{min-height:46px;padding:5px 9px}.word-dialog-head h2{font-size:16px}.word-dialog-head p{font-size:8px}.word-dialog-head .close-button{width:32px;height:32px}.word-image-wrap img{inset:2px;width:calc(100% - 4px);height:calc(100% - 4px)}.word-audio-console{min-height:52px;padding:5px 9px}.word-audio-console .play-button{width:38px;height:38px}.word-nav{min-height:42px;padding:3px 7px;gap:4px}.word-nav>button{font-size:11px;padding:5px 3px}.word-nav div{min-width:72px}.word-nav strong{font-size:12px}}
.scene-item.locked,.search-result.locked{opacity:.58}.scene-item.locked .scene-index{background:#eee8df;color:#8f8579}.scene-item.locked .listen{color:#8f8579}.scene-item.locked:hover{transform:none;background:#f5f1eb}

/* Focused customer login */
.landing-page{background:linear-gradient(118deg,rgba(255,255,255,.58),transparent 48%),var(--paper)}
.login-shell{grid-template-columns:minmax(0,1.18fr) minmax(400px,.82fr)}
.login-story{padding:clamp(110px,14vh,160px) clamp(40px,8vw,140px) 70px;border-right:0}
.login-story:before{inset:7%;background-size:56px 56px;opacity:.7}
.brand-mark{top:clamp(34px,6vh,62px);left:clamp(40px,8vw,140px)}
.brand-mark span{width:44px;height:44px;font-size:23px;background:rgba(255,253,248,.58)}
.brand-mark i{font-weight:700;letter-spacing:.18em}
.login-story .eyebrow{margin:0 0 16px}
.login-story h1{font-size:clamp(48px,5.2vw,78px);max-width:760px;margin:0 0 24px;line-height:1.14}
.login-lead{max-width:600px;font-size:17px;line-height:1.85}
.constellation{right:5%;bottom:5%;opacity:.5;transform:scale(.86)}
.login-panel{position:relative;padding:clamp(28px,5vw,72px);background:#eae2d6;box-shadow:inset 1px 0 rgba(80,65,48,.08)}
.login-panel:before{content:"";position:absolute;inset:24px;border:1px solid rgba(112,91,68,.11);pointer-events:none}
.login-card{position:relative;padding:44px 42px;border-radius:18px;background:#fffdf8;box-shadow:0 28px 80px rgba(58,44,30,.14)}
.login-card h2{font-size:34px;margin:8px 0 6px}
.login-card form{margin-top:28px}
.login-card,.login-story>p,.login-story>h1{animation:login-reveal .55s ease both}
.login-card{animation-delay:.08s}
@keyframes login-reveal{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
@media(max-width:1050px){.login-shell{grid-template-columns:1fr;min-height:100vh}.login-story{min-height:42vh;padding:110px 8vw 54px}.login-panel{min-height:58vh;padding:42px 24px}.constellation{right:4%;bottom:-6%;opacity:.25}.brand-mark{left:8vw;top:34px}}
@media(max-width:720px){.login-story{min-height:38vh;padding:92px 24px 36px}.brand-mark{left:24px;top:25px}.brand-mark span{width:38px;height:38px;font-size:20px}.login-story .eyebrow{font-size:10px}.login-story h1{font-size:38px;margin-bottom:16px}.login-lead{font-size:14px;line-height:1.75}.login-panel{min-height:62vh;padding:24px 16px}.login-panel:before{inset:10px}.login-card{padding:30px 26px;border-radius:14px}.login-card h2{font-size:29px}}
@media(prefers-reduced-motion:reduce){.login-card,.login-story>p,.login-story>h1{animation:none}}
.brand-mark{display:block}.brand-mark span,.brand-mark i{display:none}.brand-mark strong{font-size:34px;line-height:1;color:var(--red);font-weight:800;letter-spacing:.14em}@media(max-width:720px){.brand-mark strong{font-size:29px}}
.media-protected-stage{position:relative;min-width:0;min-height:0;overflow:hidden}.media-protected-stage>.scene-canvas{position:absolute;inset:0}.media-trace-layer{position:absolute;inset:0;z-index:8;display:none;overflow:hidden;pointer-events:none}.media-trace-layer.active{display:block}.media-trace-layer .trace-stamp{color:#8b2d25;opacity:.12;font-size:clamp(10px,1vw,16px);font-weight:700;text-shadow:0 1px 1px rgba(255,255,255,.9),0 0 3px rgba(255,255,255,.55);transition:none}.word-image-wrap>.media-trace-layer{inset:4px}@media(max-width:720px){.word-image-wrap>.media-trace-layer{inset:2px}.media-trace-layer .trace-stamp{font-size:10px;opacity:.13}}
.login-panel-stack{width:min(420px,100%);display:grid}.login-panel-stack>.public-notice-card{width:100%}