:root{color-scheme:dark;--world-bg: #091015;--world-panel: #111b22;--world-panel-strong: #18242c;--world-text: #f3f1e8;--world-muted: #a8b5b7;--world-line: rgba(211, 224, 221, .22);--world-line-strong: rgba(227, 236, 232, .46);--world-paper: #f3f0e6;--world-ink: #152126;--world-signal: #58dfc3;--world-warning: #ffc765;--world-entry-surface: rgba(9, 16, 21, .84);--world-entry-muted: #bac7c8;--world-font: "Space Grotesk Variable", "Source Han Sans SC", "Microsoft YaHei", sans-serif}:root[data-world-theme=day]{color-scheme:light;--world-bg: #dbe8e7;--world-panel: #f2f2ea;--world-panel-strong: #e1e7df;--world-text: #142126;--world-muted: #51666a;--world-line: rgba(21, 48, 52, .24);--world-line-strong: rgba(21, 48, 52, .48);--world-paper: #132329;--world-ink: #f6f3e9;--world-signal: #006b61;--world-warning: #9c5a00;--world-entry-surface: rgba(224, 235, 232, .88);--world-entry-muted: #324b50}*{box-sizing:border-box}html,body{width:100%;min-width:320px;height:100%;margin:0;overflow:hidden;background:var(--world-bg)}body{color:var(--world-text);font-family:var(--world-font);letter-spacing:0}button,input{color:inherit;font:inherit;letter-spacing:0}button,a{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--world-signal);outline-offset:3px}.world-shell [hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.world-skip-link{position:fixed;z-index:1000;top:10px;left:10px;padding:10px 14px;color:var(--world-ink);background:var(--world-paper);transform:translateY(-160%)}.world-skip-link:focus{transform:translateY(0)}.world-shell{position:relative;width:100%;height:100svh;min-height:560px;overflow:hidden;isolation:isolate;background:var(--world-bg)}.world-canvas{position:absolute;inset:0;display:block;width:100%;height:100%;background:var(--world-bg);opacity:0;transition:opacity .5s ease}.world-shell[data-mode=interactive-ready] .world-canvas,.world-shell[data-mode=interactive] .world-canvas{opacity:1}.world-shell[data-mode=interactive-ready] .world-map-fallback,.world-shell[data-mode=interactive] .world-map-fallback{opacity:0;pointer-events:none}.world-map-fallback{position:absolute;inset:0;display:grid;place-items:center;overflow:hidden;background:var(--world-bg);transition:opacity .35s ease}.world-map-frame{position:relative;width:min(76vw,760px);aspect-ratio:1}.world-map-art{display:block;width:100%;height:100%}.map-water{fill:var(--world-bg)}.map-land{fill:color-mix(in srgb,var(--world-panel-strong) 88%,#3b705e)}.map-shore{fill:none;stroke:var(--world-line-strong);stroke-width:2}.map-ring-road{fill:none;stroke:color-mix(in srgb,var(--world-text) 26%,transparent);stroke-width:10}.map-spoke-road{stroke:color-mix(in srgb,var(--world-text) 18%,transparent);stroke-width:6}.map-hub-ring{fill:none;stroke:var(--world-signal);stroke-width:3}.map-north{fill:var(--world-muted)}.map-scale{position:absolute;right:4%;bottom:4%;padding-top:5px;border-top:1px solid var(--world-line-strong);color:var(--world-muted);font-size:10px}.map-destination{position:absolute;z-index:2;left:var(--map-x);top:var(--map-y);display:flex;align-items:center;gap:6px;min-width:36px;min-height:36px;padding:8px;border:1px solid var(--world-line-strong);border-radius:4px;color:var(--world-text);background:var(--world-panel);cursor:pointer;transform:translate(-50%,-50%)}.map-destination span{white-space:nowrap;font-size:12px}.map-destination:hover{border-color:var(--world-signal);color:var(--world-signal)}.map-destination--research{--region: #48a4ff}.map-destination--algo{--region: #ffb84a}.map-destination--math{--region: #32d9c5}.map-destination--courses{--region: #71ce83}.map-destination--blog{--region: #ef7cad}.map-destination--tools{--region: #9a8cff}.map-destination:not(.map-destination--hub) svg{color:var(--region)}.fallback-readout{position:absolute;left:max(22px,6vw);bottom:max(24px,6vh);width:min(390px,calc(100% - 44px))}.fallback-readout span{color:var(--world-signal);font-size:10px;font-weight:700}.fallback-readout strong{display:block;margin-top:6px;font-size:28px}.fallback-readout p{max-width:34em;margin:8px 0 0;color:var(--world-muted);font-size:14px;line-height:1.65}.world-topbar{position:absolute;z-index:20;top:0;left:0;display:grid;width:100%;min-height:62px;grid-template-columns:1fr auto 1fr;align-items:center;padding:max(10px,env(safe-area-inset-top)) 18px 8px;pointer-events:none}.world-topbar>*{pointer-events:auto}.world-brand{display:inline-flex;width:-moz-fit-content;width:fit-content;align-items:center;gap:10px;color:inherit;text-decoration:none}.world-brand-mark{display:grid;width:34px;height:34px;place-items:center;border:1px solid var(--world-line-strong);color:var(--world-signal);font-size:10px;font-weight:700}.world-brand>span:last-child{display:flex;align-items:baseline;gap:6px}.world-brand strong{font-size:15px}.world-brand small{color:var(--world-muted);font-size:11px}.world-location{display:flex;align-items:center;gap:7px;padding:7px 10px;border:1px solid var(--world-line);color:var(--world-muted);background:color-mix(in srgb,var(--world-panel) 84%,transparent);font-size:11px}.world-actions{display:flex;justify-self:end;gap:6px}.world-icon-button{display:inline-flex;min-width:36px;height:36px;align-items:center;justify-content:center;gap:7px;padding:0 9px;border:1px solid var(--world-line);border-radius:4px;color:var(--world-text);background:color-mix(in srgb,var(--world-panel) 88%,transparent);text-decoration:none;cursor:pointer}.world-icon-button:hover:not(:disabled){border-color:var(--world-line-strong);color:var(--world-signal)}.world-icon-button:disabled{opacity:.45;cursor:not-allowed}.world-control-label{font-size:10px}.world-shell.is-entered .world-brand,.world-shell.is-entered .world-location,.world-shell.is-entered .world-icon-button,.world-shell.is-entered .world-hud{border-color:#e1e9e22e;color:#f4f1e8;background:#0d1415e6;box-shadow:0 10px 28px #02080929}.world-shell.is-entered .world-brand{padding:4px 10px 4px 4px;border:1px solid rgba(225,233,226,.18)}.world-shell.is-entered .world-brand-mark{border-color:#58dfc37a}.world-shell.is-entered .world-brand small,.world-shell.is-entered .world-location,.world-shell.is-entered .hud-speed span,.world-shell.is-entered .hud-drive-state{color:#aebbb6}.world-shell.is-entered .world-icon-button:hover:not(:disabled){border-color:#58dfc3ad;color:#58dfc3;background:#131f1ff5}.world-entry{position:absolute;z-index:15;inset:0;display:grid;grid-template-rows:auto 1fr auto;padding:88px max(24px,6vw) max(28px,6vh);background:transparent;transition:opacity .55s ease,visibility .55s ease}.world-entry:before{content:"";position:absolute;z-index:0;inset:0 auto 0 0;width:min(680px,58vw);border-right:1px solid var(--world-line);background:var(--world-entry-surface);pointer-events:none}.world-shell.is-entered .world-entry{visibility:hidden;opacity:0;pointer-events:none}.entry-coordinate,.entry-copy,.entry-regions{position:relative;z-index:1}.entry-coordinate{display:flex;grid-row:1;justify-content:flex-end;gap:16px;color:var(--world-text);font-size:9px;font-variant-numeric:tabular-nums;text-shadow:0 1px 8px var(--world-bg)}.entry-copy{grid-row:2;align-self:center;max-width:500px}.entry-eyebrow{margin:0 0 16px;color:var(--world-signal);font-size:11px;font-weight:700}.entry-copy h1{margin:0;font-size:68px;font-weight:620;line-height:.98}.entry-copy h1 span{color:var(--world-paper)}.entry-copy>p:not(.entry-eyebrow,.entry-status){max-width:30em;margin:22px 0 0;color:var(--world-entry-muted);font-family:Source Han Sans SC,Microsoft YaHei,sans-serif;font-size:18px;line-height:1.7}.world-enter-button{display:inline-flex;min-height:46px;align-items:center;gap:12px;margin-top:30px;padding:0 16px;border:1px solid var(--world-paper);border-radius:4px;color:var(--world-ink);background:var(--world-paper);cursor:pointer}.world-enter-button span{min-width:110px;text-align:left;font-size:13px;font-weight:650}.world-enter-button:hover:not(:disabled){border-color:var(--world-signal);background:var(--world-signal)}.world-enter-button:disabled{opacity:.6;cursor:wait}.entry-status{margin:9px 0 0;color:var(--world-entry-muted);font-size:10px}.entry-regions{display:grid;grid-row:3;grid-template-columns:repeat(6,minmax(0,1fr));border-top:1px solid var(--world-line)}.entry-regions span{display:flex;gap:8px;padding:10px 12px 0 0;color:var(--world-text);font-size:11px;text-shadow:0 1px 8px var(--world-bg)}.entry-regions b{color:var(--world-signal);font-weight:600}.world-hud{position:absolute;z-index:12;left:max(16px,3vw);bottom:max(18px,4vh);min-width:220px;padding:12px 14px;border-left:2px solid var(--world-signal);background:color-mix(in srgb,var(--world-panel) 88%,transparent)}.hud-speed{display:flex;align-items:baseline;gap:6px}.hud-speed svg{align-self:center;margin-right:4px;color:var(--world-signal)}.hud-speed strong{min-width:2ch;font-size:25px;font-variant-numeric:tabular-nums}.hud-speed span{color:var(--world-muted);font-size:10px}.hud-drive-state{display:flex;align-items:center;gap:7px;margin-top:4px;color:var(--world-muted);font-size:10px}.hud-indicator{width:6px;height:6px;border-radius:50%;background:var(--world-signal)}.hud-cancel-route{display:inline-flex;align-items:center;gap:5px;margin-top:8px;padding:5px 7px;border:1px solid var(--world-line);border-radius:4px;color:var(--world-text);background:transparent;cursor:pointer;font-size:10px}.world-preview{position:absolute;z-index:14;right:max(18px,4vw);bottom:max(20px,5vh);width:min(390px,calc(100% - 36px));padding:18px;border:1px solid var(--world-line-strong);border-radius:6px;background:color-mix(in srgb,var(--world-panel) 94%,transparent)}.world-preview-close{position:absolute;top:10px;right:10px;display:grid;width:30px;height:30px;place-items:center;border:0;color:var(--world-muted);background:transparent;cursor:pointer}.world-preview>p:first-of-type{margin:0 36px 7px 0;color:var(--world-signal);font-size:10px;font-weight:700}.world-preview h2{margin:0;font-size:21px;line-height:1.35}.world-preview>p:nth-of-type(2){margin:10px 0 0;color:var(--world-muted);font-family:Source Han Sans SC,Microsoft YaHei,sans-serif;font-size:13px;line-height:1.6}.world-preview-tags{display:flex;flex-wrap:wrap;gap:5px;margin-top:12px}.world-preview-tags span{padding:3px 6px;border:1px solid var(--world-line);color:var(--world-muted);font-size:9px}.world-preview-actions{display:flex;gap:8px;margin-top:16px}.world-preview-actions button,.world-preview-actions a{display:inline-flex;min-height:38px;align-items:center;justify-content:center;gap:7px;padding:0 11px;border:1px solid var(--world-line-strong);border-radius:4px;color:var(--world-text);background:transparent;text-decoration:none;cursor:pointer;font-size:11px}.world-preview-actions a{color:var(--world-ink);background:var(--world-paper)}.world-dialog{width:min(980px,calc(100% - 32px));max-height:min(820px,calc(100svh - 32px));padding:0;overflow:hidden;border:1px solid var(--world-line-strong);border-radius:6px;color:var(--world-text);background:var(--world-panel)}.world-dialog::backdrop{background:#020709bd}.world-dialog-header{display:flex;min-height:74px;align-items:center;justify-content:space-between;padding:14px 16px 12px 20px;border-bottom:1px solid var(--world-line)}.world-dialog-header span{color:var(--world-signal);font-size:9px;font-weight:700}.world-dialog-header h2{margin:3px 0 0;font-size:21px}.dialog-map-frame{position:relative;width:min(68vh,680px);max-width:90%;aspect-ratio:1;margin:16px auto 0}.dialog-map-note{margin:4px 16px 18px;color:var(--world-muted);text-align:center;font-size:11px}.world-directory-dialog{width:min(1180px,calc(100% - 32px))}.directory-tools{display:grid;grid-template-columns:1fr minmax(220px,300px);gap:18px;align-items:center;padding:12px 18px;border-bottom:1px solid var(--world-line)}.directory-tabs{display:flex;gap:4px;overflow-x:auto}.directory-tabs button{display:inline-flex;min-height:34px;align-items:center;gap:6px;padding:0 9px;border:1px solid transparent;border-radius:4px;color:var(--world-muted);background:transparent;white-space:nowrap;cursor:pointer;font-size:11px}.directory-tabs button[aria-selected=true]{border-color:var(--world-line-strong);color:var(--world-text);background:var(--world-panel-strong)}.directory-tabs span{color:var(--world-signal);font-size:9px}.directory-search{display:flex;height:36px;align-items:center;gap:8px;padding:0 10px;border:1px solid var(--world-line);border-radius:4px;color:var(--world-muted)}.directory-search input{min-width:0;flex:1;border:0;outline:0;color:var(--world-text);background:transparent;font-size:11px}.directory-search input::-moz-placeholder{color:var(--world-muted)}.directory-search input::placeholder{color:var(--world-muted)}.directory-body{max-height:calc(min(820px,100svh - 32px) - 136px);overflow:auto}.directory-region{padding:24px 20px 30px}.directory-region-header{display:grid;grid-template-columns:minmax(220px,.7fr) 1.3fr;gap:36px;padding-bottom:20px;border-bottom:1px solid var(--world-line)}.directory-region-header p{margin:0;color:var(--world-muted);font-family:Source Han Sans SC,Microsoft YaHei,sans-serif;font-size:12px;line-height:1.65}.directory-region-header>div p{color:var(--world-signal);font-family:var(--world-font);font-size:9px;font-weight:700}.directory-region-header h3{margin:4px 0 0;font-size:25px}.directory-list{display:grid}.directory-row{display:grid;min-height:68px;grid-template-columns:58px minmax(0,1fr) 92px 34px;gap:14px;align-items:center;padding:10px 0;border-bottom:1px solid var(--world-line)}.directory-kind{color:var(--world-signal);font-size:9px}.directory-row h4{margin:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px}.directory-row p{margin:4px 0 0;overflow:hidden;color:var(--world-muted);font-family:Source Han Sans SC,Microsoft YaHei,sans-serif;font-size:11px;line-height:1.45;text-overflow:ellipsis;white-space:nowrap}.directory-row time{color:var(--world-muted);font-size:9px;text-align:right}.directory-row>button,.directory-row>a{display:grid;width:32px;height:32px;place-items:center;border:1px solid var(--world-line);border-radius:4px;color:var(--world-text);background:transparent;cursor:pointer}.directory-row>button:hover,.directory-row>a:hover{border-color:var(--world-signal);color:var(--world-signal)}.world-toast{position:absolute;z-index:30;left:50%;bottom:28px;max-width:calc(100% - 32px);padding:9px 12px;border:1px solid var(--world-line-strong);border-radius:4px;background:var(--world-panel);font-size:11px;transform:translate(-50%)}.pulse-lab-controls{position:absolute;z-index:18;right:max(18px,3vw);bottom:max(20px,4vh);width:min(340px,calc(100% - 36px));padding:16px;border:1px solid var(--world-line-strong);border-radius:6px;background:color-mix(in srgb,var(--world-panel) 94%,transparent)}.pulse-lab-controls header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding-bottom:13px;border-bottom:1px solid var(--world-line)}.pulse-lab-controls header span{color:var(--world-signal);font-size:9px;font-weight:700}.pulse-lab-controls h2{margin:3px 0 0;font-size:17px}.pulse-lab-controls header button,.pulse-lab-controls .lab-step{min-height:32px;padding:0 9px;border:1px solid var(--world-line-strong);border-radius:4px;color:var(--world-text);background:transparent;cursor:pointer;font-size:10px}.pulse-lab-controls>label{display:grid;gap:7px;padding-top:13px}.pulse-lab-controls>label span{display:flex;justify-content:space-between;color:var(--world-muted);font-size:10px}.pulse-lab-controls output{color:var(--world-signal);font-variant-numeric:tabular-nums}.pulse-lab-controls input[type=range]{width:100%;accent-color:var(--world-signal)}.pulse-lab-controls fieldset{display:flex;gap:5px;margin:14px 0 0;padding:0;border:0}.pulse-lab-controls legend{width:100%;margin-bottom:7px;color:var(--world-muted);font-size:10px}.pulse-lab-controls fieldset button{min-height:30px;flex:1;border:1px solid var(--world-line);border-radius:4px;color:var(--world-muted);background:transparent;cursor:pointer;font-size:9px}.pulse-lab-controls fieldset button[aria-pressed=true]{border-color:var(--world-signal);color:var(--world-text);background:var(--world-panel-strong)}.pulse-lab-controls .lab-step{width:100%;margin-top:12px}@media(max-width:899px),(pointer:coarse){.world-shell{min-height:500px}.world-topbar{grid-template-columns:1fr auto}.world-location,.world-control-label{display:none}.world-map-frame{width:min(96vw,660px);transform:translateY(5vh)}.map-destination span{display:none}.map-destination{width:36px;min-width:36px;padding:0;justify-content:center}.fallback-readout{bottom:18px}.world-entry{padding:82px 20px 24px;background:transparent}.world-entry:before{width:100%;border-right:0;background:color-mix(in srgb,var(--world-entry-surface) 72%,transparent)}.entry-coordinate{display:none}.entry-copy{align-self:start;margin-top:3vh}.entry-copy h1{font-size:46px}.entry-copy>p:not(.entry-eyebrow,.entry-status){max-width:25em;font-size:15px}.entry-regions{grid-template-columns:repeat(3,1fr);gap:8px 0}.entry-regions span{padding-top:8px}.world-shell:not(.is-entered) .map-destination,.world-shell:not(.is-entered) .fallback-readout{visibility:hidden;opacity:0;pointer-events:none}.world-shell:not(.is-entered) .world-map-art{opacity:.48}.world-hud{display:none}.world-preview{right:16px;bottom:16px}.directory-tools{grid-template-columns:1fr}.directory-region-header{grid-template-columns:1fr;gap:10px}.directory-row{grid-template-columns:45px minmax(0,1fr) 34px}.directory-row time{display:none}}@media(max-width:520px){.world-topbar{padding-inline:10px}.world-brand>span:last-child{display:none}.world-actions{gap:3px}.world-icon-button{min-width:34px;height:34px;padding:0 7px}.world-actions [data-world-audio-toggle]{display:none}.world-map-frame{width:min(calc(100vw - 24px),440px);transform:translateY(8vh)}.fallback-readout strong{font-size:22px}.world-entry{padding-inline:18px}.entry-copy h1{font-size:39px}.entry-copy h1 span{display:block}.entry-regions{grid-template-columns:repeat(2,1fr)}.world-dialog{width:calc(100% - 16px);max-height:calc(100svh - 16px)}.world-directory-dialog{width:100%;max-width:none;height:100svh;max-height:none;border:0;border-radius:0}.directory-body{max-height:calc(100svh - 166px)}.directory-region{padding-inline:14px}.directory-row{gap:8px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}