*,:before,:after{--tw-border-spacing-x: 0;--tw-border-spacing-y: 0;--tw-translate-x: 0;--tw-translate-y: 0;--tw-rotate: 0;--tw-skew-x: 0;--tw-skew-y: 0;--tw-scale-x: 1;--tw-scale-y: 1;--tw-pan-x: ;--tw-pan-y: ;--tw-pinch-zoom: ;--tw-scroll-snap-strictness: proximity;--tw-gradient-from-position: ;--tw-gradient-via-position: ;--tw-gradient-to-position: ;--tw-ordinal: ;--tw-slashed-zero: ;--tw-numeric-figure: ;--tw-numeric-spacing: ;--tw-numeric-fraction: ;--tw-ring-inset: ;--tw-ring-offset-width: 0px;--tw-ring-offset-color: #fff;--tw-ring-color: rgb(59 130 246 / .5);--tw-ring-offset-shadow: 0 0 #0000;--tw-ring-shadow: 0 0 #0000;--tw-shadow: 0 0 #0000;--tw-shadow-colored: 0 0 #0000;--tw-blur: ;--tw-brightness: ;--tw-contrast: ;--tw-grayscale: ;--tw-hue-rotate: ;--tw-invert: ;--tw-saturate: ;--tw-sepia: ;--tw-drop-shadow: ;--tw-backdrop-blur: ;--tw-backdrop-brightness: ;--tw-backdrop-contrast: ;--tw-backdrop-grayscale: ;--tw-backdrop-hue-rotate: ;--tw-backdrop-invert: ;--tw-backdrop-opacity: ;--tw-backdrop-saturate: ;--tw-backdrop-sepia: ;--tw-contain-size: ;--tw-contain-layout: ;--tw-contain-paint: ;--tw-contain-style: }::backdrop{--tw-border-spacing-x: 0;--tw-border-spacing-y: 0;--tw-translate-x: 0;--tw-translate-y: 0;--tw-rotate: 0;--tw-skew-x: 0;--tw-skew-y: 0;--tw-scale-x: 1;--tw-scale-y: 1;--tw-pan-x: ;--tw-pan-y: ;--tw-pinch-zoom: ;--tw-scroll-snap-strictness: proximity;--tw-gradient-from-position: ;--tw-gradient-via-position: ;--tw-gradient-to-position: ;--tw-ordinal: ;--tw-slashed-zero: ;--tw-numeric-figure: ;--tw-numeric-spacing: ;--tw-numeric-fraction: ;--tw-ring-inset: ;--tw-ring-offset-width: 0px;--tw-ring-offset-color: #fff;--tw-ring-color: rgb(59 130 246 / .5);--tw-ring-offset-shadow: 0 0 #0000;--tw-ring-shadow: 0 0 #0000;--tw-shadow: 0 0 #0000;--tw-shadow-colored: 0 0 #0000;--tw-blur: ;--tw-brightness: ;--tw-contrast: ;--tw-grayscale: ;--tw-hue-rotate: ;--tw-invert: ;--tw-saturate: ;--tw-sepia: ;--tw-drop-shadow: ;--tw-backdrop-blur: ;--tw-backdrop-brightness: ;--tw-backdrop-contrast: ;--tw-backdrop-grayscale: ;--tw-backdrop-hue-rotate: ;--tw-backdrop-invert: ;--tw-backdrop-opacity: ;--tw-backdrop-saturate: ;--tw-backdrop-sepia: ;--tw-contain-size: ;--tw-contain-layout: ;--tw-contain-paint: ;--tw-contain-style: }*,:before,:after{box-sizing:border-box;border-width:0;border-style:solid;border-color:#e5e7eb}:before,:after{--tw-content: ""}html,:host{line-height:1.5;-webkit-text-size-adjust:100%;-moz-tab-size:4;-o-tab-size:4;tab-size:4;font-family:ui-sans-serif,system-ui,sans-serif,"Apple Color Emoji","Segoe UI Emoji",Segoe UI Symbol,"Noto Color Emoji";font-feature-settings:normal;font-variation-settings:normal;-webkit-tap-highlight-color:transparent}body{margin:0;line-height:inherit}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-feature-settings:normal;font-variation-settings:normal;font-size:1em}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}button,input,optgroup,select,textarea{font-family:inherit;font-feature-settings:inherit;font-variation-settings:inherit;font-size:100%;font-weight:inherit;line-height:inherit;letter-spacing:inherit;color:inherit;margin:0;padding:0}button,select{text-transform:none}button,input:where([type=button]),input:where([type=reset]),input:where([type=submit]){-webkit-appearance:button;background-color:transparent;background-image:none}:-moz-focusring{outline:auto}:-moz-ui-invalid{box-shadow:none}progress{vertical-align:baseline}::-webkit-inner-spin-button,::-webkit-outer-spin-button{height:auto}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}summary{display:list-item}blockquote,dl,dd,h1,h2,h3,h4,h5,h6,hr,figure,p,pre{margin:0}fieldset{margin:0;padding:0}legend{padding:0}ol,ul,menu{list-style:none;margin:0;padding:0}dialog{padding:0}textarea{resize:vertical}input::-moz-placeholder,textarea::-moz-placeholder{opacity:1;color:#9ca3af}input::placeholder,textarea::placeholder{opacity:1;color:#9ca3af}button,[role=button]{cursor:pointer}:disabled{cursor:default}img,svg,video,canvas,audio,iframe,embed,object{display:block;vertical-align:middle}img,video{max-width:100%;height:auto}[hidden]:where(:not([hidden=until-found])){display:none}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}.fixed{position:fixed}.absolute{position:absolute}.relative{position:relative}.block{display:block}.flex{display:flex}.grid{display:grid}.hidden{display:none}.flex-wrap{flex-wrap:wrap}.border{border-width:1px}.uppercase{text-transform:uppercase}.filter{filter:var(--tw-blur) var(--tw-brightness) var(--tw-contrast) var(--tw-grayscale) var(--tw-hue-rotate) var(--tw-invert) var(--tw-saturate) var(--tw-sepia) var(--tw-drop-shadow)}:root{--ink: #172033;--muted: #647085;--paper: #fffaf0;--panel: rgba(255, 255, 255, .9);--line: rgba(23, 32, 51, .14);--shadow: rgba(23, 32, 51, .12);--purple: #8b5cf6;--green: #22c55e;--blue: #0ea5e9;--orange: #f97316;--body: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;--display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;--latin-round: "Baloo 2", var(--display);--round: var(--display)}*{box-sizing:border-box}body{min-width:320px;min-height:100vh;margin:0;color:var(--ink);font-family:var(--body);background:linear-gradient(rgba(23,32,51,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(23,32,51,.035) 1px,transparent 1px),linear-gradient(135deg,#fffaf0,#eef9ff 46%,#f5f0ff);background-size:34px 34px,34px 34px,auto}button,a{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}h1,h2,h3,p{margin:0}h1,h2,h3,.brand strong{font-family:var(--round);letter-spacing:0}.app-shell{min-height:100vh}.topbar{position:sticky;top:0;z-index:30;display:grid;grid-template-columns:minmax(250px,1fr) auto;gap:18px;align-items:center;padding:14px clamp(14px,2.5vw,30px);border-bottom:1px solid var(--line);background:#fffaf0db;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);transition:transform .18s ease,opacity .18s ease}.topbar.topbar-hidden{transform:translateY(-100%);opacity:0;pointer-events:none}.brand{display:inline-flex;min-width:0;gap:12px;align-items:center}.brand>svg{width:46px;height:46px;flex:0 0 auto;padding:10px;border:3px solid var(--ink);border-radius:16px;background:#f3e8ff;color:var(--purple);box-shadow:5px 5px 0 var(--shadow)}.brand strong{display:block;overflow:hidden;font-size:22px;line-height:1;text-overflow:ellipsis;white-space:nowrap}.brand small{display:block;overflow:hidden;max-width:460px;margin-top:4px;color:var(--muted);font-size:12px;font-weight:800;text-overflow:ellipsis;white-space:nowrap}.topbar nav{display:flex;max-width:720px;gap:8px;align-items:center;overflow-x:auto;scrollbar-width:none}.topbar nav::-webkit-scrollbar{display:none}.topbar nav a,.locale-toggle button,.primary-button,.secondary-button{min-height:42px;border:2px solid var(--line);border-radius:999px;background:#fff;color:var(--ink);font-weight:900}.topbar nav a{display:inline-flex;align-items:center;padding:0 13px;white-space:nowrap}.mobile-menu-button{display:none;align-items:center;justify-content:center;gap:7px;min-height:42px;border:2px solid var(--line);border-radius:999px;background:#fff;color:var(--ink);font-weight:900}.locale-toggle{display:inline-flex;flex:0 0 auto;gap:6px;align-items:center;padding:5px;border:2px solid var(--line);border-radius:999px;background:#fffc}.locale-toggle svg{margin-left:6px;color:var(--muted)}.locale-toggle button{min-height:34px;padding:0 11px;border-color:transparent;background:transparent;font-size:13px}.locale-toggle button.active{background:var(--ink);color:#fff}.page-shell{width:min(1240px,calc(100% - 28px));margin:0 auto;padding:clamp(24px,4vw,46px) 0 72px}.route-notice{margin:0 0 18px;border:1px solid rgba(245,158,11,.28);border-radius:16px;background:#fffbeb;color:#92400e;padding:12px 16px;font-weight:800}.home-hero,.topic-hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(300px,.72fr);gap:clamp(18px,3vw,32px);align-items:stretch;margin-bottom:22px;padding:clamp(22px,4vw,42px);border:3px solid rgba(23,32,51,.16);border-radius:28px;background:linear-gradient(135deg,#fffffff2,#e0f2fed1),#fff;box-shadow:0 20px 46px #17203314}.home-hero h1,.topic-hero h1{max-width:760px;font-size:clamp(48px,7.5vw,98px);line-height:.95}.topic-hero h1{font-size:clamp(40px,6.2vw,78px)}.home-hero p:not(.kicker),.topic-hero-copy p:not(.kicker){max-width:700px;margin-top:16px;color:var(--muted);font-size:clamp(18px,2.2vw,24px);font-weight:800;line-height:1.45}.kicker{display:inline-flex;width:-moz-fit-content;width:fit-content;align-items:center;min-height:30px;margin-bottom:12px;padding:5px 11px;border:2px solid rgba(23,32,51,.15);border-radius:999px;background:#fff4cc;color:#345064;font-size:13px;font-weight:900}.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}.primary-button,.secondary-button{display:inline-flex;gap:8px;align-items:center;justify-content:center;padding:0 18px}.primary-button{border-color:#4338ca;background:#4f46e5;color:#fff;box-shadow:0 9px #4338ca29}.parent-note{display:grid;align-content:center;gap:14px;min-height:260px;padding:24px;border:3px solid var(--ink);border-radius:24px;background:#fff;box-shadow:8px 8px 0 var(--shadow)}.parent-note svg{width:42px;height:42px;color:var(--purple)}.parent-note strong{font:800 25px/1.1 var(--round)}.parent-note span{color:var(--muted);font-weight:800;line-height:1.5}.home-hero-visual{position:relative;overflow:hidden}.home-hero-visual>div{position:relative;z-index:1;display:grid;gap:14px;padding:18px;border-radius:18px;background:#ffffffdb;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.home-hero-image{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;-o-object-fit:cover;object-fit:cover}.featured-observation,.worlds-section,.selected-world-panel,.related-strip{margin-top:20px;padding:clamp(18px,2.5vw,28px);border:3px solid rgba(23,32,51,.14);border-radius:24px;background:var(--panel);box-shadow:0 18px 38px #17203312}.featured-observation-card{display:grid;grid-template-columns:minmax(260px,.8fr) minmax(0,1fr);overflow:hidden;border:3px solid rgba(23,32,51,.14);border-radius:20px;background:#fff;box-shadow:6px 6px #17203314}.featured-observation-image{width:100%;height:100%;min-height:260px;-o-object-fit:cover;object-fit:cover}.featured-observation-copy{display:grid;gap:13px;align-content:center;padding:clamp(18px,3vw,32px)}.featured-observation-copy strong{font:800 clamp(30px,4vw,52px)/1 var(--round)}.featured-observation-copy span{color:var(--muted);font-size:clamp(17px,2vw,22px);font-weight:800;line-height:1.45}.section-head{display:grid;gap:6px;max-width:840px;margin-bottom:18px}.section-head h2{font-size:clamp(30px,4vw,48px);line-height:1}.section-head p:not(.kicker){color:var(--muted);font-weight:800;line-height:1.55}.world-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.world-card{display:grid;min-height:210px;gap:10px;align-content:start;padding:20px;border:3px solid rgba(23,32,51,.16);border-radius:20px;background:linear-gradient(180deg,var(--soft),#fff);color:var(--ink);text-align:left}.world-card.active{border-color:var(--accent);box-shadow:0 14px 30px #1720331f;transform:translateY(-2px)}.world-card svg{width:40px;height:40px;color:var(--accent)}.world-card span,.status-pill{width:-moz-fit-content;width:fit-content;padding:5px 10px;border-radius:999px;background:#17203314;color:#334155;font-size:12px;font-style:normal;font-weight:900}.world-card strong{font:800 27px/1 var(--round)}.world-card small{color:var(--muted);font-size:14px;font-weight:800;line-height:1.45}.topic-card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.topic-card{display:grid;min-height:220px;gap:11px;align-content:start;padding:18px;border:3px solid rgba(23,32,51,.14);border-radius:20px;background:#fff;box-shadow:6px 6px #17203314}.topic-card-image{width:100%;aspect-ratio:16 / 9;overflow:hidden;border:2px solid rgba(23,32,51,.12);border-radius:14px;-o-object-fit:cover;object-fit:cover}.topic-card.completed{background:linear-gradient(135deg,#f3e8ff,#fff)}.topic-card strong{font:800 24px/1.12 var(--round)}.topic-card span,.topic-card small{color:var(--muted);font-weight:800;line-height:1.45}.topic-card svg{width:36px;height:36px;color:var(--purple)}.empty-world-note{padding:18px;border-radius:18px;background:#f8fafc;color:var(--muted);font-weight:900;line-height:1.5}.tag-row{display:flex;flex-wrap:wrap;gap:7px}.tag-row em{padding:5px 9px;border-radius:999px;background:#eef6ff;color:#285d8f;font-size:12px;font-style:normal;font-weight:900}.open-topic{display:inline-flex;gap:5px;align-items:center;margin-top:auto}.status-completed{background:#dcfce7;color:#166534}.status-building{background:#e0e7ff;color:#3730a3}.status-comingSoon{background:#ffedd5;color:#9a3412}.status-planned{background:#f1f5f9;color:#475569}.back-link{display:inline-flex;gap:8px;align-items:center;margin-bottom:14px;color:#39465c;font-weight:900}.placeholder-scene{position:relative;min-height:360px;overflow:hidden;border:3px solid var(--ink);border-radius:24px;background:radial-gradient(circle at 28% 30%,rgba(34,197,94,.22),transparent 9rem),radial-gradient(circle at 70% 40%,rgba(79,70,229,.2),transparent 11rem),linear-gradient(135deg,#fff,#eef9ff);box-shadow:8px 8px 0 var(--shadow)}.scene-image{position:absolute;top:0;right:0;bottom:0;left:0;z-index:1;width:100%;height:100%;-o-object-fit:cover;object-fit:cover}.placeholder-scene.orbitMap{background:linear-gradient(135deg,#1e1b4b,#312e81 45%,#eef2ff)}.placeholder-scene.microScene{background:linear-gradient(135deg,#fff1f2,#ffe4e6 48%,#fff)}.scene-orbit{position:absolute;z-index:2;top:16%;right:16%;bottom:16%;left:16%;border:3px dashed rgba(23,32,51,.24);border-radius:50%}.scene-node{position:absolute;z-index:2;width:74px;height:74px;border:3px solid var(--ink);border-radius:50%;background:#fff4cc}.scene-node.one{left:18%;top:23%;background:#dcfce7}.scene-node.two{right:20%;top:35%;background:#fee2e2}.scene-node.three{left:45%;bottom:18%;background:#e0e7ff}.scene-label{position:absolute;z-index:3;left:24px;bottom:24px;max-width:calc(100% - 48px);padding:10px 14px;border-radius:16px;background:#fff;font:800 22px/1.1 var(--round);box-shadow:0 8px 24px #17203321}.generated-scene .scene-orbit,.generated-scene .scene-node{display:none}.goal-list{display:flex;flex-wrap:wrap;gap:9px;margin-top:20px}.goal-list span{display:inline-flex;gap:7px;align-items:center;padding:8px 11px;border-radius:999px;background:#fff;color:#334155;font-size:13px;font-weight:900}.content-grid{display:grid;grid-template-columns:1fr;gap:16px}.stage-section{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;scroll-margin-top:145px}.stage-head{grid-column:1 / -1;display:grid;grid-template-columns:38px minmax(0,1fr);gap:10px;align-items:start;padding:4px 2px 0}.stage-head>span{display:grid;width:34px;height:34px;place-items:center;border-radius:50%;background:#172033;color:#fff;font-size:14px;font-weight:900}.stage-head h2{margin:0;color:var(--ink);font-size:clamp(22px,2.2vw,30px);line-height:1.05}.stage-head p{max-width:760px;margin:6px 0 0;color:var(--muted);font-size:14px;font-weight:800;line-height:1.45}.stage-section.active .stage-head>span{background:#4f46e5}.learning-flow-rail{position:sticky;top:82px;z-index:20;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;margin:0 0 16px;padding:10px;border:2px solid rgba(23,32,51,.12);border-radius:18px;background:#fffaf0eb;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.learning-flow-rail button{display:grid;min-width:0;gap:4px;align-content:start;padding:9px;border:2px solid transparent;border-radius:13px;background:#fff;color:var(--ink);text-align:left}.learning-flow-rail button.active{border-color:#4f46e5;background:#eef2ff}.learning-flow-status{display:none;border:0}.learning-flow-rail button>span{display:grid;width:24px;height:24px;place-items:center;border-radius:50%;background:#172033;color:#fff;font-size:12px;font-weight:900}.learning-flow-rail strong{min-width:0;overflow:hidden;overflow-wrap:anywhere;font-size:14px;font-weight:900;text-overflow:ellipsis;white-space:nowrap}.learning-flow-rail small{color:var(--muted);font-size:11px;font-weight:800;line-height:1.35}.panel{padding:clamp(17px,2.3vw,24px);border:3px solid rgba(23,32,51,.14);border-radius:22px;background:var(--panel);box-shadow:0 14px 30px #17203312}.panel.wide{grid-column:1 / -1}.stage-section>.related-strip{grid-column:1 / -1}.interaction-panel{display:grid;grid-template-columns:1fr;gap:14px;align-items:start}.interaction-panel>.section-head{grid-column:1 / -1}.interaction-panel>.topic-visual{grid-column:1;grid-row:auto;position:static;margin-bottom:0}.interaction-controls{grid-column:1;display:grid;gap:12px;min-width:0}.task-answer-controls{align-self:start}.interaction-panel .group-list,.interaction-panel .object-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.topic-visual{overflow:hidden;margin:0 0 14px;border:2px solid rgba(23,32,51,.12);border-radius:16px;background:#fff;text-align:center}.topic-visual:empty{display:none}.topic-visual-image{display:block;width:auto;max-width:100%;height:auto;max-height:min(68vh,720px);-o-object-fit:contain;object-fit:contain}.topic-visual-image-wrap{position:relative;display:inline-block;max-width:100%;overflow:hidden;vertical-align:top;background:#f8fafc}.visual-focus-overlay{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none}.visual-focus-region{position:absolute;border:2px solid rgba(255,255,255,.72);border-radius:16px;box-shadow:0 0 0 999px #0f172a14;opacity:.24;transition:opacity .18s ease,transform .18s ease,box-shadow .18s ease}.visual-focus-region.active{opacity:1;transform:scale(1.03);border-width:3px;box-shadow:0 0 0 4px #ffffffa6,0 12px 30px #0f172a33}.visual-focus-region.warning.active{border-style:dashed;border-color:#f97316e6}.visual-focus-region small{position:absolute;top:8px;left:8px;max-width:calc(100% - 16px);padding:4px 8px;overflow-wrap:anywhere;border-radius:999px;background:#ffffffeb;color:var(--ink);font-size:12px;font-weight:900;line-height:1.2}.topic-visual figcaption{padding:9px 11px;color:var(--muted);font-size:13px;font-weight:800;line-height:1.4}.scene-deck-page{--scene-workbench-height: clamp(500px, calc(100vh - 240px) , 680px);display:grid;gap:10px;padding-top:14px;padding-bottom:24px}.scene-deck-page .back-link{margin-bottom:0}.scene-deck-hero{display:grid;grid-template-columns:minmax(180px,.36fr) minmax(0,1fr);gap:6px 18px;align-items:end;padding:0}.scene-deck-hero p{grid-column:1;margin:0;color:#2563eb;font-size:13px;font-weight:900}.scene-deck-hero h1{grid-column:1;margin:0;color:#172033;font-size:clamp(28px,3.4vw,42px);line-height:1.05}.scene-deck-hero strong{grid-column:2;grid-row:1 / span 2;align-self:center;color:#475569;font-size:15px;line-height:1.4}.scene-focus-list,.scene-task-options{display:grid;grid-template-columns:repeat(auto-fit,minmax(118px,1fr));gap:10px}.scene-deck-nav-shell{display:grid;gap:8px}.scene-nav-toggle{display:none}.scene-deck-nav{display:flex;gap:8px;overflow-x:auto;padding:2px 2px 6px;scrollbar-width:none}.scene-deck-nav::-webkit-scrollbar{display:none}.scene-deck-nav button,.scene-focus-list button,.scene-task-options button{min-width:0;border:2px solid rgba(23,32,51,.08);border-radius:12px;background:#fff;color:#172033;font:inherit;font-weight:900;cursor:pointer}.scene-deck-nav button{display:grid;grid-template-columns:24px minmax(0,1fr);flex:0 0 clamp(136px,17vw,190px);align-items:center;gap:8px;min-height:42px;padding:7px 10px;text-align:left}.scene-deck-nav button.active,.scene-focus-list button.active,.scene-task-options button.selected{border-color:#2563eb;background:#eff6ff}.scene-deck-nav span{display:grid;place-items:center;width:24px;height:24px;border-radius:999px;background:#172033;color:#fff;font-size:12px}.scene-deck-nav button.active span{background:#2563eb}.scene-deck-nav strong{overflow:hidden;font-size:13px;line-height:1.2;text-overflow:ellipsis;white-space:nowrap}.scene-panel-deck{display:grid;gap:18px}.scene-panel{min-width:0}.scene-deck-stage,.scene-panel-evidence{display:grid;grid-template-columns:minmax(300px,.68fr) minmax(420px,1.32fr);gap:18px;align-items:stretch;min-height:var(--scene-workbench-height)}.scene-deck-copy,.scene-task-card,.scene-summary-panel,.scene-panel-summary{display:grid;gap:12px;padding:16px;border:1px solid rgba(23,32,51,.08);border-radius:8px;background:#fff}.scene-deck-copy{align-content:start;max-height:var(--scene-workbench-height);overflow-y:auto;overscroll-behavior:contain}.scene-kicker{margin:0;color:#0f766e;font-size:12px;font-weight:900;text-transform:uppercase}.scene-deck-copy h2,.scene-task-card h3{margin:0;color:#172033;font-size:22px;line-height:1.14}.scene-deck-copy p,.scene-content-block p,.scene-evidence-card p,.scene-task-card p,.scene-summary-panel p{margin:0;color:#475569;line-height:1.55;white-space:pre-line}.scene-focus-list button,.scene-task-options button{min-height:38px;padding:7px 9px}.scene-evidence-card,.scene-content-block{display:grid;gap:8px;padding:12px;border-radius:8px;background:#f8fafc}.scene-evidence-card strong,.scene-content-block strong{color:#172033;font-size:15px}.scene-visual-panel{display:grid;gap:8px;align-content:start;min-width:0}.scene-visual-frame{position:relative;display:grid;aspect-ratio:16 / 9;place-items:center;overflow:hidden;border-radius:8px;background:#f8fafc;box-shadow:0 16px 36px #1720331f}.scene-visual-image{display:block;width:100%;height:100%;-o-object-fit:contain;object-fit:contain}.scene-region-layer,.scene-region{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none}.scene-region{inset:auto;border:2px solid rgba(37,99,235,.28);border-radius:10px;opacity:.5}.scene-region.active{border-color:#f59e0b;background:#f59e0b24;opacity:1}.scene-visual-caption{display:-webkit-box;margin:0;overflow:hidden;color:#64748b;font-size:13px;font-weight:800;line-height:1.35;-webkit-box-orient:vertical;-webkit-line-clamp:2}.scene-task-panel,.scene-panel-task,.scene-summary-panel,.scene-panel-summary{display:grid;gap:12px}.scene-task-panel[hidden]{display:none}.scene-task-feedback{color:#2563eb;font-size:15px}.scene-task-feedback.wrong{color:#be123c}@media (max-width: 760px){.scene-deck-page{--scene-workbench-height: auto;width:100%;gap:0;padding-top:0;padding-bottom:0}.app-shell-topic .topbar{position:fixed;right:0;left:0;padding:10px 9px}.app-shell-topic .brand>svg{width:40px;height:40px;padding:8px;border-radius:14px}.app-shell-topic .brand strong{font-size:18px}.app-shell-topic .brand small{max-width:58vw;font-size:11px}.app-shell-topic .mobile-menu-button{min-height:40px;padding:0 12px}.app-shell-topic .page-shell{padding-top:76px}.scene-deck-page .back-link,.scene-deck-hero{display:none}.scene-deck-nav-shell{position:fixed;top:72px;right:12px;left:12px;z-index:25;gap:8px;pointer-events:none}.scene-nav-toggle{display:grid;grid-template-columns:28px minmax(0,1fr);align-items:center;justify-self:start;gap:8px;max-width:min(100%,360px);min-height:44px;padding:8px 12px;border:2px solid rgba(23,32,51,.08);border-radius:999px;background:#fffffff0;box-shadow:0 12px 28px #17203329;color:#172033;font:inherit;font-weight:900;text-align:left;cursor:pointer;pointer-events:auto}.scene-nav-toggle span{display:grid;place-items:center;width:28px;height:28px;border-radius:999px;background:#2563eb;color:#fff;font-size:13px}.scene-nav-toggle strong{min-width:0;overflow:hidden;font-size:14px;line-height:1.2;text-overflow:ellipsis;white-space:nowrap}.scene-deck-nav{display:none;max-height:calc(100svh - 76px);overflow-y:auto;padding:10px;border:1px solid rgba(23,32,51,.08);border-radius:18px;background:#fffffff5;box-shadow:0 16px 36px #1720332e;pointer-events:auto}.scene-deck-nav-shell.expanded .scene-deck-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.scene-deck-nav button{grid-template-columns:24px minmax(0,1fr);flex:none;min-height:40px;padding:7px 8px}.scene-deck-nav span{width:24px;height:24px;font-size:12px}.scene-panel-deck{gap:0}.scene-panel{min-height:100svh;padding:132px 14px 24px}.scene-panel-evidence{grid-template-columns:1fr;gap:14px;align-content:start}.scene-visual-panel{order:-1}.scene-deck-copy{max-height:none;overflow:visible;padding:0;border:0;background:transparent;overscroll-behavior:auto}.scene-visual-frame{max-height:min(42svh,360px);box-shadow:0 12px 28px #1720331f}.scene-deck-copy h2,.scene-task-card h3{font-size:20px}.scene-deck-copy p,.scene-content-block p,.scene-evidence-card p,.scene-task-card p,.scene-panel-summary p{font-size:14px;line-height:1.48}.scene-focus-list,.scene-task-options{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.scene-focus-list button,.scene-task-options button{min-height:36px;padding:7px 8px;font-size:13px}.scene-panel-task,.scene-panel-summary{align-content:center}}.visual-support-text{display:grid;gap:5px;min-height:84px;padding:11px 12px;border-bottom:2px solid rgba(23,32,51,.08);background:#f8fafc;text-align:left}.visual-support-text strong{color:var(--ink);font-weight:900}.visual-support-text p,.visual-support-text small{margin:0;color:var(--muted);font-size:13px;font-weight:800;line-height:1.45;white-space:pre-line}.evidence-panel{display:none}.evidence-heading{display:flex;align-items:center;justify-content:space-between;gap:10px}.evidence-heading strong{overflow:hidden;color:#fff;font-weight:900;font-size:12px;text-overflow:ellipsis;white-space:nowrap}.evidence-heading span{padding:4px 8px;border-radius:999px;background:#ffffffeb;color:#172033;font-size:12px;font-weight:900;white-space:nowrap}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.evidence-panel p{margin:0;color:var(--muted);font-size:13px;font-weight:800;line-height:1.45}.evidence-chips{display:flex;flex-wrap:wrap;gap:6px}.evidence-chip{display:inline-flex;flex-direction:column;align-items:flex-start;gap:2px;padding:5px 8px;border-radius:999px;background:#eef2ff;color:#3730a3;font-size:12px;font-weight:900}.evidence-chip small{color:inherit;font-size:10px;font-weight:700;opacity:.78}.evidence-chip.warning{background:#ffedd5;color:#9a3412}.topic-visual.evidence-correct .evidence-panel,.topic-visual.evidence-complete .evidence-panel{background:#166534d1}.topic-visual.evidence-wrong .evidence-panel{background:#9a3412d6}.group-list,.object-grid,.task-grid,.compare-grid,.step-row{display:grid;gap:10px}.group-list{grid-template-columns:repeat(2,minmax(0,1fr))}.group-card,.object-card,.task-options button{border:2px solid var(--line);border-radius:15px;background:#fff;color:var(--ink)}.group-card{display:grid;gap:7px;padding:13px;text-align:left}.group-card.active,.object-card.active,.task-options button.selected{border-color:#4f46e5;background:#eef2ff}.group-card strong,.object-card strong{font-weight:900}.group-card span,.object-card small,.object-detail span,.object-detail small{color:var(--muted);font-size:13px;font-weight:800;line-height:1.45}.object-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.object-card{display:grid;gap:6px;min-height:112px;padding:12px;text-align:left}.object-card svg{color:#4f46e5}.object-detail{display:grid;gap:6px;margin-top:12px;padding:13px;border-radius:16px;background:#f8fafc}.step-row{grid-template-columns:repeat(2,minmax(0,1fr))}.step-card,.compare-card,.task-card{display:grid;gap:9px;padding:15px;border:2px solid var(--line);border-radius:18px;background:#fff}button.step-card{color:var(--ink);text-align:left}.step-card.active{border-color:#4f46e5;background:#eef2ff}.step-card span{display:grid;width:34px;height:34px;place-items:center;border-radius:50%;background:#4f46e5;color:#fff;font-weight:900}.step-card strong,.compare-card strong,.task-card strong{font-weight:900}.step-card small,.compare-card small,.compare-card em,.task-card span,.task-card p{color:var(--muted);font-weight:800;line-height:1.45}.compare-grid{grid-template-columns:1fr}button.compare-card{color:var(--ink);text-align:left}.compare-card.active{border-color:#4f46e5;background:#eef2ff}.compare-card div{display:grid;gap:3px;padding:10px;border-radius:12px;background:#f8fafc}.compare-card em{color:#2563eb;font-style:normal}.task-grid{grid-template-columns:1fr}.task-tabs{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 12px}.task-tabs button{min-height:38px;padding:0 12px;border:2px solid var(--line);border-radius:999px;background:#fff;color:var(--ink);font-weight:900}.task-tabs button.active,.task-card.active{border-color:#4f46e5;background:#eef2ff}.interaction-panel .node-strip{display:grid;grid-template-columns:repeat(auto-fit,minmax(112px,1fr));gap:8px;align-items:stretch}.interaction-panel .node-button{display:grid;grid-template-columns:30px minmax(0,1fr);min-height:46px;align-items:center;gap:8px;padding:8px 10px;border:2px solid var(--line);border-radius:12px;background:#fff;color:var(--ink);text-align:left;box-shadow:none;cursor:pointer}.interaction-panel .node-button.active{border-color:#4f46e5;background:#eef2ff;box-shadow:inset 0 0 0 1px #4f46e533}.interaction-panel .node-button .node-index{display:grid;width:28px;height:28px;place-items:center;border-radius:50%;background:#172033;color:#fff;font-size:12px;font-weight:900;line-height:1}.interaction-panel .node-button.active .node-index{background:#4f46e5}.interaction-panel .node-button .node-label{min-width:0;overflow:hidden;color:var(--ink);font-size:13px;font-weight:900;line-height:1.25;text-overflow:ellipsis;white-space:nowrap}.task-card.correct{border-color:#22c55e;background:#f0fdf4}.task-card.wrong{border-color:#f97316;background:#fff7ed}.task-card svg{color:#4f46e5}.task-options{display:flex;flex-wrap:wrap;gap:8px}.task-options button{min-height:38px;padding:0 11px;font-weight:900}.speak-list{display:grid;gap:9px}.speak-list span,.parent-tips li{padding:11px;border-radius:14px;background:#f8fafc;color:#334155;font-weight:800;line-height:1.45}.parent-tips{display:grid;gap:9px;margin:0;padding:0;list-style:none}.related-strip{display:flex;flex-wrap:wrap;gap:13px;align-items:center}.related-strip strong{font:800 24px/1 var(--round)}@media (max-width: 980px){.topbar{grid-template-columns:1fr auto;gap:10px}.brand{min-width:0}.brand small{max-width:min(66vw,520px)}.mobile-menu-button{display:inline-flex}.topbar nav{display:none;grid-column:1 / -1;max-width:none;padding:4px 0 2px}.topbar nav.open{display:flex;flex-wrap:wrap;overflow-x:visible}.topbar nav a{min-height:40px}.locale-toggle{grid-column:1 / -1;justify-self:start}.home-hero,.topic-hero,.featured-observation-card,.content-grid,.stage-section,.interaction-panel{grid-template-columns:1fr}.interaction-panel>.topic-visual{grid-column:1;grid-row:auto;position:static}.interaction-controls,.task-answer-controls{grid-column:1}.world-grid,.topic-card-grid,.compare-grid,.task-grid,.step-row,.object-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width: 640px){.page-shell{width:min(100% - 14px,1240px);padding-top:12px;padding-bottom:46px}.topbar{padding:10px 9px}.brand>svg{width:40px;height:40px;padding:8px;border-radius:14px}.brand strong{font-size:18px}.brand small{max-width:58vw;font-size:11px}.mobile-menu-button{min-height:40px;padding:0 12px}.locale-toggle{width:100%;justify-content:space-between}.locale-toggle button{flex:1}.home-hero,.topic-hero,.featured-observation,.worlds-section,.selected-world-panel,.panel{border-radius:18px}.panel{padding:14px;border-width:2px}.home-hero h1,.topic-hero h1{font-size:38px;line-height:1}.home-hero p:not(.kicker),.topic-hero-copy p:not(.kicker){font-size:17px}.hero-actions{display:grid}.parent-note,.placeholder-scene{min-height:240px}.topic-card,.world-card{min-height:0}.task-options{display:grid}.task-options button{width:100%}.learning-flow-rail{position:fixed;top:70px;left:10px;right:10px;z-index:26;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:5px;margin-bottom:12px;padding:6px;overflow:hidden;border-radius:16px;box-shadow:0 12px 28px #1720331f;scrollbar-width:none;transition:max-width .18s ease,padding .18s ease,transform .18s ease,opacity .18s ease}.learning-flow-rail::-webkit-scrollbar{display:none}.learning-flow-rail.is-collapsed{width:-moz-max-content;width:max-content;max-width:calc(100vw - 20px);padding:6px 10px;overflow:hidden;transform:translateY(-4px);opacity:.92}.learning-flow-rail.is-hidden{visibility:hidden;pointer-events:none;opacity:0;transform:translateY(-10px)}.learning-flow-rail.is-collapsed button{display:none}.learning-flow-rail.is-collapsed button.learning-flow-status{display:inline-flex}.learning-flow-rail.is-collapsed .learning-flow-status{align-items:center;justify-content:center;min-height:32px;max-width:calc(100vw - 44px);padding:0 10px;overflow:hidden;border-radius:999px;background:#172033;color:#fff;font-size:12px;font-weight:900;text-overflow:ellipsis;white-space:nowrap}.learning-flow-rail button{grid-template-columns:1fr;min-width:0;max-width:none;align-items:center;justify-items:center;padding:6px 4px;text-align:center}.learning-flow-rail button>span{width:22px;height:22px;font-size:11px}.learning-flow-rail button small{display:none}.learning-flow-rail strong{max-width:100%;font-size:11px;line-height:1.15;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.interaction-panel{gap:10px}.stage-section{gap:10px;scroll-margin-top:124px}.stage-head{grid-template-columns:30px minmax(0,1fr);gap:8px;padding:0 2px}.stage-head>span{width:28px;height:28px;font-size:12px}.stage-head h2{font-size:20px}.stage-head p{margin-top:4px;font-size:12px;line-height:1.35}.interaction-panel>.topic-visual{grid-column:1;grid-row:auto;position:static;border-radius:14px;box-shadow:0 12px 24px #1720331f}.interaction-controls,.task-answer-controls{grid-column:1}.interaction-panel .topic-visual-image{max-height:58vh}.interaction-panel .evidence-panel{max-height:24vh;overflow:auto;padding:10px}.interaction-panel .evidence-heading{align-items:flex-start}.interaction-panel .evidence-heading strong,.interaction-panel .evidence-panel p{font-size:12px;line-height:1.35}.interaction-panel .evidence-chip{font-size:11px}.interaction-panel .group-card,.interaction-panel .object-card,.interaction-panel .step-card,.interaction-panel .compare-card,.interaction-panel .task-card{padding:11px;border-radius:14px}.interaction-panel .object-card{min-height:0}.interaction-panel .task-tabs{display:grid;grid-template-columns:repeat(auto-fit,minmax(84px,1fr));overflow:visible;padding-bottom:0}.interaction-panel .task-tabs button{max-width:none;white-space:nowrap}.world-grid,.topic-card-grid,.compare-grid,.task-grid,.group-list,.step-row,.object-grid,.stage-section{grid-template-columns:1fr}.interaction-panel .group-list,.interaction-panel .object-grid,.interaction-panel .step-row,.interaction-panel .compare-grid,.interaction-panel .task-grid,.interaction-panel .task-tabs{display:grid;grid-template-columns:repeat(auto-fit,minmax(112px,1fr));gap:8px;margin-inline:0;padding:0;overflow:visible}.interaction-panel .group-card,.interaction-panel .object-card,.interaction-panel .step-card,.interaction-panel .compare-card,.interaction-panel .task-card{display:grid;place-items:center;min-width:0;min-height:0;padding:9px}.interaction-panel .node-button{grid-template-columns:26px minmax(0,1fr);min-height:42px;justify-items:stretch;place-items:center stretch}.interaction-panel .node-button .node-index{width:24px;height:24px}.interaction-panel .group-card strong,.interaction-panel .object-card strong,.interaction-panel .step-card strong,.interaction-panel .compare-card strong,.interaction-panel .task-tabs button,.interaction-panel .node-button .node-label{display:-webkit-box;overflow:hidden;font-size:12px;line-height:1.2;white-space:normal;-webkit-box-orient:vertical;-webkit-line-clamp:2}.interaction-panel .object-card svg{width:16px;height:16px}}@media (prefers-reduced-motion: reduce){.topbar{transition:none}}