@charset "UTF-8";.language-toggle{border:1px solid currentColor!important;border-radius:20px;padding:7px 10px!important;min-width:42px;letter-spacing:0!important}.reading-head .language-toggle{margin-left:auto}.help-shell>.language-toggle{margin-left:16px}html[lang=en] .intro h1{font-size:clamp(48px,5.4vw,86px);line-height:1.12}html[lang=en] .lead,html[lang=en] .chapter-copy,html[lang=en] .center-hint,html[lang=en] .primary{letter-spacing:0}html[lang=en] .reading-content h2{letter-spacing:0;line-height:1.2}html[lang=en] .brand sup{letter-spacing:0}@media (max-width:700px){.masthead nav{gap:12px!important}html[lang=en] .intro h1{font-size:54px}html[lang=en] .lead{max-width:290px}html[lang=en] .chapter-copy h2{font-size:32px;letter-spacing:0}html[lang=en] .route{letter-spacing:0;font-size:9px}html[lang=en] .reading-head{gap:10px}html[lang=en] .reading-head .eyebrow{max-width:100px}html[lang=en] .controls button{padding:8px 6px}}:root{font-family:Microsoft YaHei,PingFang SC,sans-serif;color:#203c35;background:#dce9e5;font-synthesis:none;--ink:#203c35;--paper:#f3f2e8;--muted:#546b62}*{box-sizing:border-box}body{margin:0}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}button:disabled{cursor:wait;opacity:.6}button:focus-visible,a:focus-visible,canvas:focus-visible{outline:2px solid #b15c2c;outline-offset:5px}button:hover{color:#9c542d}[hidden]{display:none!important}#experience{position:relative;height:100svh;min-height:560px;overflow:hidden}#world{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;touch-action:none}.shade{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;background:linear-gradient(90deg,rgba(242,245,225,.49),transparent 64%),linear-gradient(0deg,rgba(242,245,225,.7),transparent 16%)}.masthead{position:absolute;top:34px;left:4.5vw;right:4.5vw;display:flex;align-items:center;justify-content:space-between;gap:20px;z-index:2}.brand{font-family:Georgia,serif;font-size:27px;letter-spacing:-1.7px;padding:0}.brand span{font-style:italic}.brand sup{font:10px Microsoft YaHei,sans-serif;letter-spacing:2px;margin-left:20px;vertical-align:middle}.masthead nav{display:flex;gap:30px}.masthead nav button{font-size:12px;letter-spacing:2px;padding:12px 0}.intro{position:absolute;left:8.5vw;top:20%;max-width:490px;pointer-events:none}.intro button{pointer-events:auto}.eyebrow{font-size:10px;letter-spacing:3px;font-weight:500}.intro h1{font-family:Songti SC,"Noto Serif CJK SC",SimSun,serif;font-weight:400;font-size:clamp(55px,6.3vw,108px);line-height:1.28;letter-spacing:.02em;margin:27px 0}.intro h1 span{font-style:italic}.lead{font-size:13px;line-height:2.05;letter-spacing:2px;color:#35564a}.entry{display:flex;align-items:center;gap:24px;margin-top:29px}.primary{display:inline-flex;align-items:center;justify-content:center;min-height:48px;border-radius:50px;background:var(--ink);color:#f7f5e7;padding:13px 27px;font-size:12px;letter-spacing:2px;transition:background .2s}.primary:hover{background:#486047;color:#fff}.text-button{font-size:12px;border-bottom:1px solid #789184;padding:9px 0}.entry-note{font-size:10px;color:var(--muted);margin-top:15px;letter-spacing:1px}.flight-footer{position:absolute;bottom:max(28px,env(safe-area-inset-bottom));left:4.5vw;right:4.5vw;display:flex;justify-content:space-between;align-items:center;gap:20px}.route{display:flex;align-items:center;gap:17px;font-size:10px;letter-spacing:1px}.route-marks{display:flex;gap:4px}.route-marks i{display:block;width:24px;height:2px;background:#91a89b}.route-marks i.active{background:#264a3e}.controls{display:flex;gap:6px}.controls button{font-size:11px;min-height:40px;padding:8px 12px;border:1px solid transparent;border-radius:24px}.controls button[aria-pressed=true]{border-color:#536e5e;background:#edf0dd8c}.chapter-copy{position:absolute;top:20%;left:7vw;max-width:460px;pointer-events:none}.chapter-copy h2{font-family:Songti SC,SimSun,serif;font-weight:400;font-size:clamp(34px,4vw,60px);margin:15px 0;letter-spacing:3px}.chapter-copy>p:last-child{font-size:12px;line-height:2;letter-spacing:1px}.center-hint{position:absolute;left:50%;bottom:110px;transform:translate(-50%);text-align:center;display:flex;flex-direction:column;align-items:center;gap:15px;white-space:nowrap}.center-hint>span{font-size:12px;letter-spacing:1.5px;text-shadow:0 1px 10px #fff}.center-hint button{box-shadow:0 8px 35px #274c3421}.telemetry{position:absolute;right:5vw;top:46%;display:grid;gap:28px;text-align:right;font-size:12px;pointer-events:none}.telemetry b{font-family:Georgia,serif;font-weight:400;font-size:32px;font-variant-numeric:tabular-nums}.telemetry small{display:block;font-size:10px;margin-top:8px;letter-spacing:2px}.feedback{position:absolute;left:50%;top:100px;transform:translate(-50%);font-size:12px;letter-spacing:2px;pointer-events:none;text-align:center;max-width:80%;padding:10px 16px;background:#f4f4eabb;border-radius:24px;opacity:0;transition:opacity .3s}.feedback.visible{opacity:1}.loading-note{position:absolute;bottom:95px;left:8.5vw;font-size:11px;color:#466253}.error-panel{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);padding:40px;width:min(90vw,520px);background:var(--paper);border-radius:4px;box-shadow:0 20px 100px #24443833}.error-panel h2{font-family:SimSun,serif;font-weight:400;font-size:30px}.error-panel p{font-size:13px;line-height:1.9}.error-panel button{margin:15px 12px 0 0}dialog{border:0;padding:0;color:var(--ink);background:var(--paper);max-width:94vw;max-height:90svh;box-shadow:0 30px 120px #173d3b40}dialog::backdrop{background:#1a383457;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}#reading{width:1050px;border-radius:3px}.reading-shell{padding:36px 50px}.reading-head{display:flex;justify-content:space-between;align-items:center;gap:20px}.reading-head button{font-size:11px;padding:12px 0;border-bottom:1px solid #889b89}.reading-tabs{display:flex;gap:30px;border-bottom:1px solid #bcc8b9;margin-top:38px}.reading-tabs button{font-size:12px;letter-spacing:1px;padding:14px 0;border-bottom:2px solid transparent}.reading-tabs button[aria-selected=true]{border-color:#274436}.reading-content{padding:20px 9% 0}.reading-content h2{font-family:Songti SC,SimSun,serif;font-weight:400;font-size:clamp(32px,4vw,52px);line-height:1.5;letter-spacing:3px;margin:20px 0 28px}.reading-content section>p{font-size:13px;line-height:2.2;max-width:60ch}.reading-content .large-copy{font-size:18px;margin:0 0 20px}.reading-content .editorial-note{font-size:11px;color:#647864;margin-top:30px}.reading-bottom{display:flex;justify-content:space-between;margin-top:45px;padding:20px 0 5px;border-top:1px solid #c2cbbd;font-size:11px}.reading-bottom button{text-decoration:underline;text-underline-offset:5px}.link-row{display:flex;justify-content:space-between;align-items:center;padding:18px 0;border-bottom:1px solid #cbd2c5;font-size:13px;gap:20px}.link-row span{font-size:11px;color:#73846f}.link-row a{color:var(--ink);text-underline-offset:5px}.help-shell{padding:35px 42px;width:min(540px,90vw)}.help-shell h2{font-family:SimSun,serif;font-weight:400;font-size:30px}.help-shell dt{font-size:12px;font-weight:600;margin-top:22px}.help-shell dd{font-size:12px;line-height:1.9;margin:8px 0;color:#526a5d}.help-shell .primary{margin-top:15px}.noscript{position:fixed;top:0;right:0;bottom:0;left:0;background:#f3f2e8;padding:15vh 12vw;z-index:10}body.flying .shade{background:linear-gradient(0deg,rgba(241,246,229,.8),transparent 18%),linear-gradient(90deg,#f1f3de33,transparent 70%)}@media (max-width:700px){#experience{min-height:560px}.masthead{top:22px;left:6vw;right:6vw}.brand{font-size:24px}.brand sup{display:none}.masthead nav{gap:18px}.masthead nav button{font-size:11px;letter-spacing:0}.intro{left:8vw;top:18%;max-width:85vw}.intro h1{font-size:60px;margin:23px 0}.lead{font-size:12px}.entry{gap:21px}.entry .primary{padding:13px 22px}.flight-footer{left:6vw;right:6vw;bottom:max(18px,env(safe-area-inset-bottom));flex-direction:column;align-items:stretch;gap:11px}.route{justify-content:space-between}.route-marks i{width:19px}.controls{justify-content:space-between}.controls button{font-size:10px;padding:8px 9px;min-height:40px}.chapter-copy{left:8vw;top:18%;max-width:79vw}.chapter-copy h2{font-size:38px}.chapter-copy>p:last-child{max-width:240px}.center-hint{bottom:132px;white-space:normal;width:90%;gap:12px}.center-hint>span{font-size:11px}.telemetry{top:48%;right:7vw;gap:20px}.telemetry b{font-size:26px}.telemetry small{font-size:9px}.feedback{top:80px;width:max-content}.reading-shell{padding:20px}.reading-head .eyebrow{font-size:8px;letter-spacing:1px}.reading-tabs{margin-top:22px;gap:25px}.reading-content{padding:16px 2% 0}.reading-content h2{margin:10px 0 25px;font-size:32px}.reading-content .large-copy{font-size:16px}.reading-content section>p{font-size:12px}.reading-bottom{margin-top:25px}.loading-note{bottom:125px}.help-shell,.error-panel{padding:25px}}.chapter-copy{max-width:670px}.chapter-copy h2{font-size:clamp(34px,3.5vw,52px);text-wrap:balance}body.flying .shade{background:linear-gradient(0deg,rgba(241,246,229,.8),transparent 18%),linear-gradient(90deg,#f1f3de8f,transparent 62%),linear-gradient(180deg,#edf2e275,transparent 16%)}.telemetry{padding:12px;border-radius:4px;background:#e9eee251}.chapter-copy>p:last-child{color:#233e32}.brand,.masthead nav button{text-shadow:0 0 15px #eef2df}@media (max-width:700px){.chapter-copy{max-width:84vw}.chapter-copy h2{font-size:34px;max-width:290px}.telemetry{top:49%;padding:8px}}@media (prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}