:root{--blue:#1463eb;--pale:#edf4ff;--ink:#142439;--muted:#5e7087;--line:#e4eaf2;--white:#fff;font-family:Inter,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:#fff;font-size:14px}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,select,input{-webkit-tap-highlight-color:transparent}button{cursor:pointer;border:1px solid var(--line);background:white;color:var(--ink);border-radius:8px;padding:10px 13px;min-height:42px}button:hover{border-color:#9dbef8;color:var(--blue);background:#f7faff}button:disabled{opacity:.4;cursor:default}button.active,button[aria-pressed=true]{color:var(--blue);background:var(--pale);border-color:#adc9f7}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #7aaaf5;outline-offset:2px}button.blue{background:var(--blue);color:white;border-color:var(--blue)}button.quiet{border:0;background:transparent;color:var(--muted)}a{color:var(--blue);text-decoration:none}small{display:block;font-size:12px;color:var(--muted)}header{height:90px;border-bottom:1px solid var(--line);display:flex;align-items:center;padding:0 30px;gap:20px}.brand{display:flex;align-items:center;gap:11px;font-size:21px;color:var(--ink);letter-spacing:.2px;white-space:nowrap}.brand small{font-size:12px;letter-spacing:1.7px;margin-top:5px}.brand-icon{width:38px;height:43px;background:var(--blue);color:white;font-weight:800;font-size:28px;display:grid;place-items:center;border-radius:12px 3px 12px 3px}nav{display:flex;gap:8px;margin:auto}nav button{border:0;border-radius:0;background:none;padding:14px 18px;position:relative}nav button small{font-size:10px;letter-spacing:1.4px;margin-top:4px}nav button.active{background:none;border:0}nav button.active:after{content:'';position:absolute;bottom:-13px;left:18px;right:18px;height:3px;background:var(--blue)}main{display:grid;grid-template-columns:230px minmax(400px,1fr) 292px;max-width:1920px;margin:auto;height:calc(100dvh - 132px);min-height:730px}.catalog{border-right:1px solid var(--line);padding:28px 18px 20px;overflow:auto}.eyebrow{font-size:11px;font-weight:650;letter-spacing:1.4px;color:var(--blue);line-height:1.8}h1{font-size:23px;font-weight:650;letter-spacing:-.7px;margin:12px 0 6px}.sub{margin:0 0 20px;color:var(--muted);font-size:13px}.search{display:flex;align-items:center;border:1px solid var(--line);border-radius:8px;height:40px;margin-bottom:20px;padding:0 9px;gap:7px}.search span{font-size:23px;color:var(--muted)}.search input{width:100%;min-width:0;border:0;outline:0;font-size:12px;color:var(--ink)}.group-title{margin:23px 7px 9px;font-size:11px;letter-spacing:1px;color:var(--muted);font-weight:550}.catalog-item{width:100%;display:flex;text-align:left;align-items:center;gap:12px;border-color:transparent;margin:2px 0;border-radius:9px;padding:10px 9px}.catalog-item .number{font-family:ui-monospace,monospace;color:#92a6c1;font-size:12px}.catalog-item .name{font-weight:550;font-size:14px}.catalog-item small{font-weight:400;font-size:10px;letter-spacing:.4px;margin-top:4px}.catalog-item.active .number{color:var(--blue)}.legacy{display:block;margin:25px 5px 0;border-top:1px solid var(--line);padding-top:18px;font-size:12px}.legacy small{font-size:10px;margin-top:7px}.workspace{position:relative;display:flex;flex-direction:column;min-width:0;background:#fbfcfe;overflow:hidden}.scene-heading{position:absolute;top:28px;left:30px;right:24px;display:flex;justify-content:space-between;align-items:flex-start;z-index:2;pointer-events:none}h2{font-size:33px;font-weight:550;letter-spacing:-1px;margin:5px 0}#subtitle{font-size:13px;color:var(--muted);margin:8px 0}.pill{display:inline-block;border:1px solid #cfdef6;background:#f6f9ff;border-radius:20px;color:var(--blue);font-size:11px;padding:6px 11px;white-space:nowrap}#viewport{position:relative;flex:1;min-height:450px;outline:0}#viewport canvas{display:block;width:100%;height:100%;touch-action:none}#loading{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);color:var(--muted);z-index:2}#fallback{position:absolute;top:40%;padding:30px;font-size:16px;line-height:1.9}#fallback a{display:block}#labels{position:absolute;inset:0;pointer-events:none;overflow:hidden}.part-label{position:absolute;transform:translate(-50%,14px);font-size:11px;background:#fffffff0;border:1px solid #cbdaf1;border-radius:5px;padding:4px 7px;white-space:nowrap;color:#39516d;pointer-events:auto;min-height:24px;max-width:150px;overflow:hidden;text-overflow:ellipsis}.part-label.selected{background:var(--blue);color:white;border-color:var(--blue)}.viewtools{position:absolute;right:20px;top:140px;display:flex;flex-direction:column;gap:5px;z-index:3}.viewtools button{width:37px;height:37px;min-height:37px;padding:0;font-size:19px;background:#fffffff0}.view-caption{display:flex;justify-content:space-between;padding:10px 24px;color:var(--muted);font-size:11px;border-top:1px solid #edf1f7}.controls{padding:16px 22px 18px;background:white;border-top:1px solid var(--line);z-index:3}.controls[hidden]{display:none}.control-line{display:flex;gap:10px;justify-content:space-between;align-items:center}.control-line.second{margin-top:13px;gap:8px;flex-wrap:wrap}.seg{display:flex;gap:4px;background:#f1f5fb;padding:4px;border-radius:9px}.seg button{border:0;background:none;min-height:35px;padding:7px 12px;font-size:12px}.seg button.active{background:white;box-shadow:0 1px 5px #1f427111}.small-label{display:flex;align-items:center;gap:7px;font-size:12px;color:var(--muted);white-space:nowrap}select{background:#fff;border:1px solid var(--line);border-radius:6px;color:var(--ink);padding:8px;min-height:36px;max-width:100%;font-size:12px}input[type=range]{accent-color:var(--blue);cursor:pointer}.light-label input{width:68px}.control-line .blue{font-size:12px}.inspector{padding:23px 21px;overflow:auto;border-left:1px solid var(--line);background:white}.inspector-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:17px}.inspector-top button{border:0;font-size:25px;padding:0;min-height:30px}.detail-en{color:var(--muted);font-size:10px;letter-spacing:1.2px}.detail-title{font-size:24px;line-height:1.3;margin:9px 0 16px;font-weight:550}.detail-desc{font-size:14px;line-height:1.9;margin:13px 0;color:#475b74}.facts{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:14px 0;margin:16px 0;gap:12px}.facts strong{font-size:20px;font-weight:500}.facts small{font-size:10px;margin-bottom:7px}.knowledge{font-size:12px;line-height:1.8;border-left:2px solid var(--blue);padding:0 0 0 11px;margin:17px 0;color:var(--muted)}.knowledge b{color:var(--ink);display:block;margin-bottom:5px}.detail-actions{display:flex;gap:6px;flex-wrap:wrap}.detail-actions button{font-size:12px;padding:7px 11px;min-height:35px}.part-heading{display:flex;justify-content:space-between;align-items:center;margin:28px 0 12px}.part-heading h3{font-size:13px;font-weight:600;margin:0}.part-heading span{font-size:11px;color:var(--muted)}#parts{max-height:280px;overflow:auto}.part-row{display:flex;align-items:center;width:100%;text-align:left;font-size:12px;border:0;border-radius:4px;min-height:36px;gap:9px;padding:8px}.part-row .num{font-size:10px;color:#90a0b5;width:20px}.part-row .arrow{margin-left:auto}.inspector-footer{border-top:1px solid var(--line);padding-top:18px;margin-top:20px}.inspector-footer label{font-size:12px;color:var(--muted);display:flex;align-items:center;justify-content:space-between;gap:5px}.inspector-footer>button{margin-top:12px;width:100%;font-size:12px}.tiny{font-size:11px;color:var(--muted);line-height:1.7;margin:8px 0 0}.telemetry{display:flex;justify-content:space-between;gap:10px;margin-top:12px;flex-wrap:wrap}.telemetry strong{font:18px ui-monospace,monospace;display:block;margin-top:5px}.telemetry small{font-size:10px}#timeline{width:100%;margin:16px 0 8px}.phase-buttons{display:flex;justify-content:space-between;gap:3px}.phase-buttons button{font-size:10px;padding:5px;min-height:28px;border:0;border-top:2px solid var(--line);border-radius:0}.phase-buttons button.active{border-color:var(--blue);background:none}footer{height:42px;display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);padding:0 30px;color:var(--muted);font-size:10px;letter-spacing:.5px}footer b{font-weight:400;margin-left:20px}dialog{width:min(720px,92vw);max-height:85dvh;overflow:auto;border:1px solid var(--line);border-radius:16px;padding:25px;color:var(--ink);box-shadow:0 20px 100px #12345622}dialog::backdrop{background:#10254365;backdrop-filter:blur(3px)}.dialog-top{display:flex;justify-content:space-between;align-items:center}.dialog-top h2{font-size:24px}.dialog-top button{font-size:24px;border:0}#dialog-body{font-size:14px;line-height:1.9}#dialog-body h3{font-size:16px;margin-top:25px}#dialog-body table{width:100%;border-collapse:collapse;font-size:12px}#dialog-body td,#dialog-body th{text-align:left;border-bottom:1px solid var(--line);padding:10px 7px;vertical-align:top}.source-link{display:block;padding:12px 0;border-bottom:1px solid var(--line)}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:#15345c;color:white;padding:12px 20px;border-radius:10px;z-index:20;opacity:0;pointer-events:none;transition:opacity .2s;max-width:90vw}#toast.show{opacity:1}.teach-mode .catalog{display:none}.teach-mode main{grid-template-columns:minmax(400px,1fr) 320px}.quiz-options{display:grid;gap:9px}.quiz-options button{text-align:left}.source-tag{display:block;margin-top:12px;font-size:10px;color:var(--muted)}
@media(min-width:1500px){main{grid-template-columns:250px minmax(500px,1fr) 320px}.scene-heading{left:42px}.catalog{padding:30px 25px}.inspector{padding:26px}}
@media(max-width:1150px){header{padding:0 18px;gap:10px}header .quiet{font-size:11px;padding:5px}.brand{font-size:18px}nav button{padding:14px 10px}main{grid-template-columns:190px minmax(360px,1fr) 240px}.catalog{padding:22px 12px}.inspector{padding:20px 14px}.controls{padding:13px}.light-label{display:none}.scene-heading{left:22px}.scene-heading h2{font-size:27px}.pill{font-size:10px}.control-line{gap:5px}.seg button{padding:7px 9px}.small-label{font-size:11px}}
@media(max-width:900px){header{height:auto;min-height:84px;flex-wrap:wrap;padding:12px 18px;gap:10px}.brand{margin-right:auto}nav{order:3;flex-basis:100%;justify-content:center;margin:0}nav button{flex:1;padding:8px}nav button.active:after{bottom:-12px}nav small{display:none}main{display:flex;flex-direction:column;height:auto;min-height:0}.catalog{padding:17px 16px 8px;order:0;border-right:0;border-bottom:1px solid var(--line);overflow:visible}.catalog>.eyebrow,.catalog>h1,.catalog>.sub,.catalog>.search,.catalog>.legacy{display:none}#catalog-list{display:flex;gap:6px;overflow:auto;padding-bottom:9px}.group-title{display:none}.catalog-item{min-width:155px;margin:0;padding:9px;min-height:52px;border-color:var(--line)}.catalog-item .number{display:none}.catalog-item small{font-size:9px}.workspace{order:1;min-height:650px}#viewport{height:490px;min-height:490px;flex:none}.scene-heading{top:22px;left:20px}.scene-heading h2{font-size:29px}.scene-heading .eyebrow{font-size:9px}.scene-heading .pill{font-size:9px}.inspector{order:2;border-left:0;border-top:1px solid var(--line);padding:24px}.inspector #detail{max-width:700px}.inspector .facts{max-width:450px}#parts{display:grid;grid-template-columns:1fr 1fr;max-height:220px}.inspector-top{margin-bottom:12px}.detail-title{font-size:25px}.inspector-footer{display:flex;align-items:center;justify-content:space-between;gap:20px}.inspector-footer>button{width:auto;margin:0}.view-caption{padding:9px 16px}.controls{padding:15px 16px}.control-line.second{justify-content:flex-start;gap:10px}.control-line.second .blue{margin-left:auto}.teach-mode main{display:flex}.teach-mode .inspector{display:block}footer{padding:0 18px;font-size:9px}footer b{display:none}.gesture{display:none}.light-label{display:flex}}
@media(max-width:430px){.brand{font-size:17px}.brand small{font-size:10px}.brand-icon{width:32px;height:36px;font-size:23px}header .quiet{padding:3px;font-size:10px}header{padding:12px}.controls{padding:12px 10px}.seg button{font-size:11px;padding:7px 9px}.small-label select{padding:7px 4px;font-size:11px}.light-label{display:none}.scene-heading .pill{display:none}.telemetry strong{font-size:15px}.control-line{flex-wrap:wrap}.phase-buttons button{font-size:9px}.viewtools{right:11px}.inspector-footer{flex-wrap:wrap}#viewport{height:440px;min-height:440px}.workspace{min-height:600px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}