@font-face{font-family:"Noto Serif SC";font-style:normal;font-weight:200 900;font-display:swap;src:url(../fonts/NotoSerifSC-Variable.woff2) format("woff2")}:root{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,sans-serif;color:#dce2e6;background:#090f16;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;color-scheme:dark;--gold:#d2b781;--muted:#85909d;--line:rgba(161,181,201,.14);--serif:"Noto Serif SC","Songti SC","SimSun",serif;--surface:#101821}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;background:radial-gradient(ellipse at 22% 12%,#17212c30,transparent 36%),#090f16}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-decoration:none}button{color:inherit}button:disabled{opacity:.45;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:2px solid #dfc68e;outline-offset:5px}button{touch-action:manipulation}button,select,input{accent-color:var(--gold)}[hidden]{display:none!important}p{line-height:1.9}h1,h2,h3,p{margin:0}button svg,a svg{flex-shrink:0}::selection{background:#635437;color:#fff2d8}.site-wrap{max-width:1480px;margin:auto;padding:0 56px}.site-header{height:76px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:13px}.brand-emblem{color:var(--gold);display:grid;place-items:center;width:40px;height:40px}.brand-title{font-family:var(--serif);font-size:29px;letter-spacing:5px;font-weight:500;display:flex;align-items:center;gap:20px}.brand-title>span{font-family:inherit;font-size:12px;font-weight:400;letter-spacing:2px;color:#9da5ad;border-left:1px solid var(--line);padding-left:20px}.site-header nav{display:flex;gap:36px;font-size:13px;letter-spacing:2px}.site-header nav a{position:relative;padding:27px 0;color:#9ba4ae}.site-header nav a:hover,.site-header nav .nav-current{color:var(--gold)}.nav-current:after{content:"";position:absolute;bottom:0;left:50%;width:18px;height:2px;transform:translate(-50%);background:var(--gold)}.header-about{display:flex;align-items:center;gap:9px;font-size:12px;color:#9ba4ae}.skip-link{position:absolute;top:8px;left:16px;transform:translateY(-150%);z-index:100;background:var(--gold);padding:12px;color:#101821}.skip-link:focus{transform:translateY(0)}.observatory{padding-top:47px;scroll-margin-top:20px}.observatory-intro{display:flex;align-items:center;justify-content:space-between;gap:32px;margin-bottom:32px}.eyebrow{font-size:10px;letter-spacing:2px;font-weight:500;color:var(--gold);display:flex;align-items:center;gap:12px}.short-rule{width:27px;height:1px;background:var(--gold)}h1{font-family:var(--serif);font-size:clamp(29px,3.3vw,46px);font-weight:400;letter-spacing:3px;margin:15px 0}h1 em{font-style:normal;color:#d8c8ac}.observatory-intro p{color:#89949f;font-size:13px;letter-spacing:1px}.date-status{display:flex;align-items:flex-end;flex-direction:column;gap:9px;flex-shrink:0;font-variant-numeric:tabular-nums}.date-status>span{display:flex;align-items:center;gap:7px;font-size:11px;letter-spacing:1px}.date-status time{font-size:15px;letter-spacing:1px}.date-status small{font-size:10px;color:#788592}.live-status{color:#a2cbb9}.sim-status{color:#d2b781}.observatory-layout{display:grid;grid-template-columns:minmax(0,1fr) 337px;border:1px solid var(--line);background:linear-gradient(140deg,#0e172188,#10171d28);border-radius:12px;overflow:hidden;min-height:596px}.space-column{min-width:0;position:relative;display:flex;flex-direction:column}.scene-shell{position:relative;flex:1;min-height:522px;overflow:hidden;background:radial-gradient(ellipse at center,#15233338,transparent 68%)}.scene-host{position:absolute;inset:0;isolation:isolate}.scene-host canvas{display:block;width:100%;height:100%;touch-action:none}.scene-label-layer{position:absolute;inset:0;pointer-events:none;overflow:hidden}.scene-label-layer>*{position:absolute;left:0;top:0;white-space:nowrap}.orbit-label{padding:6px 5px;border:none;background:transparent;color:#889aa8;font-size:11px;letter-spacing:2px;pointer-events:auto;min-height:28px;line-height:1.2;text-shadow:0 1px 5px #090f16,0 0 8px #090f16;border-radius:4px}.orbit-label:hover{color:#faf1dc;background:#19242f}.orbit-label.cardinal{color:#d9caa8;font-size:12px;font-weight:500}.orbit-label.selected{color:#f2d193;background:#51442d99;box-shadow:0 0 0 1px #a0804460}.body-label{font-size:11px;color:#9eaebb;letter-spacing:1px;text-shadow:0 2px 4px #05090d}.sun-label{color:#c8ad7c;font-size:10px}.earth-label{color:#a9cedd}.north-label{color:#d8cda7;font-size:10px}.latitude-label{font-size:11px;color:#c9d3d7;background:#0a141a8c;padding:2px 5px}.scene-heading{position:absolute;top:22px;left:23px;display:flex;align-items:center;gap:9px;z-index:2;font-size:11px;letter-spacing:1px;color:#c1c8ce;pointer-events:none}.tiny-square{width:5px;height:5px;border:1px solid #a0b3b4}.scene-heading-en{color:#596975;font-size:9px;letter-spacing:2px;margin-left:5px}.scene-angle{position:absolute;top:23px;right:24px;z-index:2;display:flex;flex-direction:column;gap:6px;align-items:flex-end;pointer-events:none}.scene-angle>span{font-size:10px;letter-spacing:1px;color:#88949d}.scene-angle strong{font-size:23px;font-weight:400;color:#cfb88a;font-variant-numeric:tabular-nums}.scene-angle small{font-size:13px;margin-left:3px}.scene-notes{position:absolute;left:22px;bottom:51px;display:flex;flex-direction:column;gap:5px;font-size:9px;letter-spacing:.5px;color:#6f7d89;pointer-events:none}.scene-bottom{position:absolute;bottom:15px;left:22px;right:19px;display:flex;align-items:center;justify-content:space-between;z-index:2}.gesture-hint{display:flex;gap:7px;align-items:center;font-size:10px;letter-spacing:.6px;color:#71818f}.icon-button{border:1px solid var(--line);background:transparent;width:31px;height:30px;border-radius:5px;display:inline-grid;place-items:center;color:#a7b1ba}.icon-button:hover{background:#1a2530;color:var(--gold)}.scene-status{position:absolute;bottom:90px;left:50%;transform:translate(-50%);max-width:85%;padding:9px 14px;background:#0c1722e8;border:1px solid #9eabac30;border-radius:6px;font-size:12px;z-index:3;line-height:1.7;pointer-events:none}.scene-status.error{bottom:auto;top:40%;width:80%;color:#e0c6a3}.view-toolbar{min-height:58px;border-top:1px solid #a1b5c911;display:flex;align-items:center;justify-content:space-between;padding:8px 21px;gap:10px}.view-buttons{display:flex;gap:7px}.view-buttons button{display:flex;align-items:center;gap:7px;color:#8d9ba8;background:transparent;border:1px solid transparent;font-size:11px;padding:7px 10px;border-radius:5px}.view-buttons button:hover,.view-buttons button.active{border-color:#a1b5c91c;background:#a1b5c90b;color:#d5c3a0}.zoom-buttons{display:flex;gap:6px}.helper-settings{display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px;padding:17px 24px;border-top:1px solid var(--line);background:#101b25}.helper-settings label{font-size:11px;display:flex;gap:5px;align-items:center}.helper-settings select{padding:4px;font-size:11px}.helper-tip{display:flex;gap:5px;font-size:10px;color:#89949f;width:100%}select{border:1px solid var(--line);border-radius:4px;background:#151e28;color:#c5cbd1;cursor:pointer}.term-detail{border-left:1px solid var(--line);background:linear-gradient(135deg,#151f29c0,#101821d0);padding:26px 25px 0;position:relative;display:flex;flex-direction:column;overflow:hidden}.detail-topline{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:10px;color:#84919e;letter-spacing:.5px}.season-badge{font-size:9px;color:var(--season-accent);padding:4px 7px;border:1px solid color-mix(in srgb,var(--season-accent) 23%,transparent);border-radius:3px}.term-title-row{display:flex;justify-content:space-between;align-items:center;margin-top:18px;margin-bottom:12px}.term-title-row h2{font-family:var(--serif);font-size:46px;letter-spacing:9px;font-weight:400;color:#eadcc4}.term-seal{font-family:var(--serif);border:1px solid #ad765b;color:#c39277;font-size:11px;line-height:1.4;padding:4px;border-radius:3px;transform:rotate(3deg);margin-right:5px}.term-meaning{font-size:12px;color:#acb4bb;line-height:1.85;min-height:66px}.term-coordinates{display:flex;gap:30px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:15px 0;margin:14px 0 17px}.term-coordinates>div{display:flex;flex-direction:column;gap:6px}.term-coordinates span{font-size:10px;color:#7f8d9b}.term-coordinates strong{font-size:25px;font-weight:400;font-variant-numeric:tabular-nums;color:#dbcfb4}.term-coordinates strong small{font-size:12px;padding-left:4px}.term-instant{display:flex;gap:10px;color:#a39377;align-items:flex-start}.term-instant>svg{margin-top:3px}.term-instant>div{display:flex;flex-direction:column;gap:7px}.term-instant span{font-size:10px;color:#8f9ca7}.term-instant time{color:#cfd2d3;font-size:12px;letter-spacing:.7px;font-variant-numeric:tabular-nums}.term-instant small{font-size:9px;color:#687885}.detail-tabs{display:flex;gap:13px;border-bottom:1px solid var(--line);margin-top:22px}.detail-tabs button{border:0;border-bottom:1px solid transparent;background:transparent;padding:0 0 10px;display:flex;gap:5px;align-items:center;color:#7d8b99;font-size:10px;white-space:nowrap}.detail-tabs [aria-selected=true]{color:var(--season-accent);border-bottom-color:var(--season-accent)}.term-content{padding-top:13px;min-height:115px}.term-content>p{font-size:12px;color:#b6bfc6;line-height:1.95}.term-content>small{display:block;margin-top:10px;font-size:9px;color:#687b89;line-height:1.8}.term-content blockquote{margin:12px 0}.term-content blockquote p{font-family:var(--serif);font-size:13px;color:#d2c6ad}.term-content cite{font-size:10px;color:#81909c;font-style:normal}.detail-source{display:flex;flex-wrap:wrap;gap:5px 10px;margin:11px 0 16px;font-size:9px;color:#65798a}.detail-source a:hover{color:var(--gold)}.next-term{width:100%;background:transparent;border:0;border-top:1px solid var(--line);padding:17px 0 19px;display:flex;align-items:center;justify-content:space-between;color:#bcab88;margin-top:auto}.next-term>div{display:flex;align-items:center;flex-wrap:wrap;gap:8px}.next-term span{font-size:9px;color:#7f8e9a}.next-term strong{font-size:14px;font-family:var(--serif);font-weight:400;color:#d0c4b0}.next-term small{font-size:9px;color:#728493}.next-term:hover strong{color:var(--gold)}.term-progress{position:absolute;bottom:0;left:0;height:2px;width:100%;background:#43526330}.term-progress i{display:block;height:100%;background:var(--season-accent)}.time-controls{border:1px solid var(--line);border-radius:10px;margin:16px 0 0;padding:24px 27px 16px;background:#0e1720}.time-control-top{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:26px}.play-controls,.date-controls{display:flex;align-items:center;gap:20px}.play-button{display:flex;align-items:center;gap:8px;border:1px solid #d6b97c80;border-radius:5px;background:#c9ad7d;color:#152029;padding:9px 14px;font-size:11px;font-weight:500}.play-button:hover{background:#e0c695}.speed-label{display:flex;align-items:center;gap:9px;font-size:10px;color:#8e9aa7}.speed-label select{border:none;background:transparent;font-size:11px;padding:7px 2px}.date-picker-label{display:flex;gap:9px;align-items:center;color:#a5977c}.date-picker-label input{background:transparent;border:none;color:#a3afba;font-size:11px;max-width:245px;font-variant-numeric:tabular-nums}.date-picker-label input::-webkit-calendar-picker-indicator{opacity:.55;cursor:pointer}.today-button{display:flex;align-items:center;gap:7px;border:1px solid var(--line);border-radius:5px;background:transparent;padding:9px 11px;font-size:11px;color:#b1b8bd;white-space:nowrap}.today-button:hover{border-color:#bba47b;color:var(--gold)}.timeline-label{display:flex;justify-content:space-between;font-size:10px;color:#778997;letter-spacing:.5px;margin-bottom:11px}.timeline-label label{color:#a8b4bc}.timeline-label label span{margin-left:8px;color:#c8b285}.timeline-track{height:23px;position:relative}.timeline-track input{width:100%;margin:0;position:relative;z-index:1;-webkit-appearance:none;appearance:none;background:linear-gradient(to right,#baa177 var(--progress),#2a3743 var(--progress));height:3px;cursor:ew-resize;display:block;top:9px;border-radius:2px}.timeline-track input::-webkit-slider-thumb{appearance:none;background:#f1d69e;width:10px;height:10px;border-radius:50%;box-shadow:0 0 0 4px #dfc48b14}.timeline-track input::-moz-range-thumb{border:0;background:#f1d69e;width:10px;height:10px;border-radius:50%}.timeline-events{position:absolute;inset:0 5px;pointer-events:none}.timeline-events i{position:absolute;top:5px;width:1px;height:10px;background:#596774}.timeline-events i.major{height:14px;top:3px;background:#ae9770}.month-labels{display:flex;justify-content:space-between;color:#657785;font-size:10px;padding:1px 0 16px}.month-labels small{font-size:9px;margin-left:2px}.time-meta{display:flex;gap:25px;align-items:center;font-size:10px;color:#788a98;border-top:1px solid var(--line);padding-top:12px}.time-meta>label{display:flex;align-items:center;gap:8px}.time-meta select{font-size:10px;padding:3px 6px}.time-meta>span{margin-left:auto;font-size:9px;letter-spacing:.3px}.spin-switch small{font-size:9px;color:#5f7483}.spin-switch input{margin:0}.control-error{color:#e3a885;font-size:12px;margin-top:10px}.term-index{padding:44px 0 53px;border-bottom:1px solid var(--line);scroll-margin-top:30px}.index-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:21px;gap:16px}.index-heading h2{font-family:var(--serif);font-size:19px;font-weight:400;letter-spacing:3px;color:#c7c4b8}.index-heading>span{display:flex;align-items:center;gap:6px;font-size:10px;color:#728494}.term-seasons{display:grid;grid-template-columns:1fr 1fr;gap:0 30px}.season-row{display:flex;align-items:center;border-top:1px solid #a1b5c911;padding:16px 0;gap:18px;--season:#99bfac}.season-1{--season:#d7bd85}.season-2{--season:#c5a38a}.season-3{--season:#9ab9ce}.season-letter{font-family:var(--serif);font-size:24px;color:var(--season);display:flex;flex-direction:column;gap:3px;align-items:center;width:52px;flex-shrink:0}.season-letter>span{font-family:Arial,sans-serif;font-size:7px;letter-spacing:1px;color:#5f7482}.season-terms{display:grid;grid-template-columns:repeat(6,1fr);flex:1;gap:5px}.season-terms button{display:flex;align-items:center;flex-direction:column;gap:6px;border:1px solid transparent;border-radius:5px;background:transparent;padding:9px 4px;font-size:12px;color:#9ba8b1;min-width:0;white-space:nowrap}.season-terms button small{font-size:8px;color:#617889;font-variant-numeric:tabular-nums}.season-terms button:hover{background:#19232c}.season-terms button.selected{background:#bda07913;border-color:#bda07955;color:#e5ce9f}.season-terms button.selected small{color:#c3ac80}.season-terms button.cardinal span{color:var(--season)}.regional-note{color:#607583;font-size:10px;margin-top:16px;max-width:1070px;line-height:1.9}.reading-section{padding:61px 0;border-bottom:1px solid var(--line);scroll-margin-top:15px}.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;margin-bottom:31px}.section-heading .eyebrow,.song-intro>.eyebrow{font-size:9px;color:#9b8e75;letter-spacing:1.8px}.section-heading h2{font-family:var(--serif);font-size:30px;line-height:1.6;font-weight:400;letter-spacing:3px;color:#d8d4c7;margin-top:14px}.section-heading>p{font-size:11px;color:#71828f;line-height:2;letter-spacing:.6px}.science-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 40px}.science-grid details{border-top:1px solid var(--line);padding:21px 0}.science-grid summary{display:flex;align-items:center;cursor:pointer;font-size:13px;color:#b6c1c9;list-style:none;gap:12px}.science-grid summary::-webkit-details-marker{display:none}.science-grid summary>span:first-child{color:#8b8069;font-size:10px;font-family:Georgia,serif}.summary-plus{margin-left:auto;font-size:18px;font-weight:300;color:#5f7483}.science-grid details[open] .summary-plus{transform:rotate(45deg)}.science-grid details p{font-size:12px;color:#7f909f;margin:15px 22px 0 27px;line-height:2}.heritage-section{position:relative}.heritage-section:before{content:"时";position:absolute;right:5%;top:45px;color:#c2ac7506;font-family:var(--serif);font-size:350px;line-height:1;pointer-events:none}.history-timeline{display:grid;grid-template-columns:repeat(5,1fr);gap:0;padding-top:23px;position:relative}.history-timeline:before{content:"";position:absolute;top:27px;left:0;right:0;height:1px;background:linear-gradient(90deg,#a88e5c90,#64738140)}.history-timeline article{position:relative;padding:27px 24px 0 0}.history-dot{position:absolute;top:0;left:0;width:8px;height:8px;border:1px solid #b49a6a;border-radius:50%;background:#0c131b}.history-date{font-family:var(--serif);font-size:14px;color:#c6af83;letter-spacing:1px}.history-timeline h3{font-family:var(--serif);font-weight:400;font-size:13px;color:#c4c5bf;margin:12px 0}.history-timeline p{font-size:11px;color:#7e8f9b;line-height:2}.history-timeline a{display:inline-flex;align-items:center;gap:5px;font-size:9px;color:#a08b65;margin-top:13px}.culture-values{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;margin-top:49px;padding-top:31px;border-top:1px solid var(--line)}.culture-values article>svg{color:#b0a17d}.culture-values h3{font-family:var(--serif);font-size:15px;font-weight:400;letter-spacing:1px;color:#c4c5bd;margin:15px 0 10px}.culture-values p{font-size:11px;line-height:2;color:#778b9a}.song-section{display:grid;grid-template-columns:1fr 1.6fr;gap:60px;position:relative}.song-intro h2{font-family:var(--serif);font-size:31px;font-weight:400;letter-spacing:4px;color:#d8d0bd;margin:15px 0 18px}.song-intro p{font-size:11px;color:#85959f;line-height:2.2}.song-stamp{display:inline-block;font-family:var(--serif);font-size:12px;writing-mode:vertical-rl;border:1px solid #a17555;color:#b18a66;padding:10px 6px;margin-top:36px;letter-spacing:4px;border-radius:2px;transform:rotate(-3deg)}.song-note{display:block;font-size:9px;color:#5e7381;margin-top:18px;letter-spacing:.5px}.song-line{display:flex;gap:23px;padding:22px 0;border-bottom:1px solid #a1b5c911}.song-line:first-child{padding-top:0}.song-line:last-child{border-bottom:0;padding-bottom:0}.song-season{font-family:var(--serif);font-size:12px;color:#9a8b6c;padding-top:9px}.song-verse{font-family:var(--serif);font-size:31px;letter-spacing:3px;display:flex;align-items:center;gap:5px;color:#c1bcae;flex-wrap:wrap}.song-verse button{font:inherit;color:inherit;border:0;border-bottom:1px solid #a58f6630;background:transparent;padding:0 2px 3px;min-width:36px}.song-verse>span{color:#586671;padding:0 2px 3px}.song-verse button:hover,.song-verse button.chosen{color:#e5c485;border-bottom-color:#dcc084}.song-line p{font-size:10px;color:#6c808f;margin-top:10px;line-height:1.9}.summer-choices{display:flex;gap:12px;margin-top:12px}.summer-choices button{font-size:11px;color:#c7b58d;border:1px solid #bda07955;background:#bda07913;padding:7px 12px;border-radius:4px}.source-section .section-heading>svg{color:#857a62}.method-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px}.method-grid h3{font-size:12px;font-weight:500;color:#b6b9b3;margin-bottom:14px}.method-grid p{font-size:11px;color:#6d8392;line-height:2.1;margin-top:10px}.asset-credit{border-left:2px solid #a58f6640;margin-top:30px;padding:2px 0 2px 17px;display:flex;gap:25px;align-items:flex-start}.asset-credit strong{font-size:10px;color:#a59679;white-space:nowrap;font-weight:400;padding-top:4px}.asset-credit p{font-size:10px;color:#70828e;line-height:2}.asset-credit a{color:#a2957b}.references{border-top:1px solid var(--line);margin-top:30px;padding-top:19px}.references summary{font-size:11px;color:#9aabaf;cursor:pointer}.references summary span{font-size:9px;color:#617482;margin-left:10px}.references ol{display:grid;grid-template-columns:1fr 1fr;gap:10px 30px;padding-left:20px;margin-top:24px}.references li{font-size:10px;color:#7d909e;line-height:1.8;padding-left:4px}.references a:hover{color:var(--gold)}.site-footer{min-height:128px;display:flex;align-items:center;justify-content:space-between;gap:25px}.footer-brand{display:flex;align-items:center;font-family:var(--serif);font-size:22px;letter-spacing:4px;color:#b6b5a6;gap:20px}.footer-brand span{font-family:inherit;font-size:10px;letter-spacing:1px;color:#627481}.site-footer>span{font-size:9px;color:#526977;letter-spacing:1px}.site-footer>a:last-child{font-size:10px;color:#8b9a9f}@media(min-width:1440px){.scene-shell{min-height:565px}.observatory-layout{grid-template-columns:minmax(0,1fr) 357px}.term-detail{padding:30px 30px 0}.term-meaning{min-height:64px}.term-content{min-height:135px}}@media(max-width:1150px){.site-wrap{padding:0 32px}.site-header nav{gap:23px}.brand-title>span{display:none}.observatory-layout{grid-template-columns:minmax(0,1fr) 310px}.term-detail{padding:24px 20px 0}.scene-shell{min-height:554px}.scene-heading-en{display:none}.view-toolbar{padding:9px 12px}.view-buttons{gap:0}.view-buttons button{padding:7px;font-size:10px}.view-buttons button svg{width:13px}.zoom-buttons{display:none}.detail-tabs{gap:11px}.date-controls{gap:12px}.play-controls{gap:14px}.history-timeline article{padding-right:18px}.term-seasons{gap:0 20px}.season-row{gap:12px}.season-letter{width:42px}.song-section{gap:35px}.song-verse{font-size:27px;gap:2px}.song-verse button{min-width:32px}}@media(max-width:900px){.site-wrap{padding:0 26px}.site-header{height:70px}.site-header nav a{padding:24px 0}.header-about{display:none}.observatory{padding-top:32px}.observatory-intro{gap:22px}.observatory-intro p{font-size:11px}.date-status time{font-size:12px}.date-status small{font-size:9px}.observatory-layout{grid-template-columns:minmax(0,1fr) 286px}.scene-heading{left:16px;top:19px}.scene-angle{right:16px;top:18px}.scene-angle strong{font-size:19px}.scene-heading{font-size:10px}.scene-angle>span{font-size:9px}.scene-notes{left:16px;font-size:8px}.scene-bottom{left:16px;right:12px}.gesture-hint{font-size:9px}.term-detail{padding:23px 17px 0}.term-title-row h2{font-size:40px}.detail-topline{font-size:9px}.season-badge{font-size:8px;padding:4px 5px}.detail-tabs{gap:10px}.detail-tabs button{font-size:9px;gap:4px}.detail-tabs svg{width:12px}.term-coordinates{gap:24px}.time-control-top{gap:16px;flex-wrap:wrap}.date-controls{margin-left:auto}.time-meta{gap:15px}.term-seasons{grid-template-columns:1fr}.season-row{gap:30px}.season-terms button{padding:11px 6px}.history-timeline{grid-template-columns:repeat(3,1fr);gap:25px 5px}.history-timeline:before{display:none}.history-timeline article{border-top:1px solid var(--line)}.history-dot{top:-4px}.culture-values{grid-template-columns:repeat(2,1fr);gap:30px 40px}.song-section{grid-template-columns:1fr 1.4fr;gap:25px}.song-verse{font-size:23px}.song-verse button{min-width:28px}.song-line{gap:13px}.song-intro h2{font-size:26px}.song-intro p{font-size:10px}.method-grid{gap:30px}.section-heading h2{font-size:27px}.site-footer>span{display:none}.footer-brand span{font-size:9px}}@media(max-width:700px){.site-wrap{padding:0 20px}.site-header{height:64px;gap:15px}.brand{gap:5px}.brand-title{font-size:25px;letter-spacing:3px}.brand-emblem{width:33px}.brand-emblem svg{width:25px}.site-header nav{gap:18px;font-size:11px;letter-spacing:1px}.site-header nav a{padding:22px 0}.observatory-intro{display:block;margin-bottom:22px}.eyebrow{font-size:8px;letter-spacing:1.7px}h1{font-size:32px;margin:16px 0 12px;letter-spacing:1px}.observatory-intro p{font-size:11px;line-height:1.9;letter-spacing:.5px}.date-status{margin-top:21px;flex-direction:row;justify-content:space-between;align-items:center;gap:10px}.date-status>span{font-size:9px;letter-spacing:.4px}.date-status time{font-size:11px;letter-spacing:.5px}.date-status small{display:none}.observatory-layout{display:flex;flex-direction:column;overflow:hidden}.scene-shell{height:450px;min-height:450px;flex:none}.scene-host{inset:5px 0 0}.scene-angle strong{font-size:21px}.scene-heading{left:18px;top:22px}.scene-angle{right:18px;top:20px}.scene-notes{bottom:56px;font-size:9px;left:18px}.scene-bottom{left:18px;bottom:14px}.gesture-hint{font-size:9px}.scene-label-layer .orbit-label{font-size:10px;letter-spacing:1px;padding:7px 3px;min-height:30px}.scene-label-layer .orbit-label.cardinal{font-size:11px}.view-toolbar{padding:12px 13px}.view-buttons{width:100%;justify-content:space-between}.view-buttons button{padding:10px 8px;font-size:11px;min-height:40px;gap:6px}.view-buttons svg{width:15px}.term-detail{border-left:0;border-top:1px solid var(--line);padding:25px 23px 0;min-height:auto}.detail-topline{font-size:11px}.season-badge{font-size:10px;padding:5px 8px}.term-title-row{margin-top:15px}.term-title-row h2{font-size:43px}.term-meaning{min-height:0;font-size:13px}.term-coordinates{padding:16px 0;gap:44px;margin-top:18px}.term-coordinates span,.term-instant span{font-size:11px}.term-instant time{font-size:13px}.term-instant small{font-size:10px}.detail-tabs{gap:21px;margin-top:23px}.detail-tabs button{font-size:11px;gap:6px;min-height:36px}.detail-tabs svg{width:15px}.term-content{min-height:110px}.term-content>p{font-size:13px}.term-content>small{font-size:10px}.detail-source{font-size:10px;margin-bottom:14px}.next-term{padding:16px 0 20px}.next-term span{font-size:10px}.next-term strong{font-size:16px}.next-term small{font-size:10px}.time-controls{margin:12px 0 0;padding:20px 18px 15px}.time-control-top{display:flex;flex-direction:column;align-items:stretch;gap:16px;margin-bottom:23px}.play-controls{justify-content:space-between}.play-button{min-height:42px;padding:11px 17px;font-size:12px}.speed-label{font-size:11px}.speed-label select{font-size:12px}.date-controls{justify-content:space-between;width:100%;gap:7px}.date-picker-label{gap:6px;min-width:0;flex:1}.date-picker-label input{font-size:11px;width:100%;max-width:230px;padding:8px 0}.today-button{padding:9px;min-height:39px;font-size:10px;gap:4px}.timeline-label{font-size:10px}.timeline-track{height:37px}.timeline-track input{top:14px;height:4px}.timeline-track input::-webkit-slider-thumb{width:18px;height:18px}.timeline-track input::-moz-range-thumb{width:18px;height:18px}.timeline-events i{top:9px}.timeline-events i.major{top:7px}.month-labels{font-size:9px}.month-labels small{display:none}.time-meta{gap:12px;flex-wrap:wrap;font-size:10px}.time-meta select{padding:6px}.time-meta>span{width:100%;margin-left:0;font-size:9px;margin-top:2px}.spin-switch input{width:15px;height:15px}.helper-settings{gap:13px 20px;padding:16px}.helper-settings label{font-size:12px;min-height:30px}.helper-settings input{width:16px;height:16px}.term-index{padding:33px 0}.index-heading{display:block;margin-bottom:17px}.index-heading h2{font-size:19px;letter-spacing:2px}.index-heading>span{font-size:10px;margin-top:12px}.season-row{gap:10px;padding:12px 0}.season-letter{width:27px;font-size:24px}.season-letter>span{display:none}.season-terms{gap:2px}.season-terms button{font-size:12px;padding:10px 3px;min-height:50px;gap:8px}.season-terms button small{font-size:9px}.regional-note{font-size:10px;line-height:2}.reading-section{padding:39px 0}.section-heading{display:block;margin-bottom:25px}.section-heading h2{font-size:26px;letter-spacing:2px;line-height:1.75}.section-heading>p{margin-top:12px;font-size:11px}.science-grid{grid-template-columns:1fr;gap:0}.science-grid details{padding:19px 0}.science-grid summary{font-size:13px;gap:11px}.science-grid details p{font-size:12px;margin-right:2px}.history-timeline{display:block;padding-top:8px;border-left:1px solid #b49a6a50;margin-left:5px}.history-timeline article{border:0;padding:0 0 27px 25px}.history-dot{top:6px;left:-4px}.history-date{font-size:15px}.history-timeline h3{font-size:15px;margin:11px 0 9px}.history-timeline p{font-size:12px}.history-timeline a{font-size:10px;margin-top:9px}.history-timeline article:last-child{padding-bottom:0}.heritage-section:before{font-size:270px;top:120px;right:0}.culture-values{gap:29px 21px;margin-top:31px;padding-top:27px}.culture-values h3{font-size:14px;letter-spacing:0;line-height:1.7}.culture-values p{font-size:11px;line-height:2}.song-section{display:block}.song-intro h2{font-size:27px}.song-intro p{font-size:11px}.song-stamp{display:none}.song-note{margin-top:14px;font-size:9px}.song-lines{margin-top:30px}.song-line{gap:17px;padding:23px 0}.song-verse{font-size:29px;gap:3px;letter-spacing:2px}.song-verse button{min-width:34px;padding-bottom:5px;min-height:44px}.song-line p{font-size:10px}.summer-choices button{min-height:40px}.method-grid{grid-template-columns:1fr;gap:28px}.method-grid h3{font-size:13px;margin-bottom:10px}.method-grid p{font-size:11px}.source-section .section-heading>svg{display:none}.asset-credit{display:block;padding-left:15px;margin-top:28px}.asset-credit strong{font-size:11px}.asset-credit p{font-size:10px;margin-top:8px}.references{margin-top:25px}.references summary{padding:8px 0;font-size:12px}.references ol{grid-template-columns:1fr;gap:12px}.references li{font-size:11px}.site-footer{padding:25px 0;min-height:110px}.footer-brand{font-size:23px;gap:9px;flex-direction:column;align-items:flex-start}.footer-brand span{font-size:9px;letter-spacing:0}.site-footer>a:last-child{font-size:10px}.icon-button{min-width:36px;min-height:36px}}@media(max-width:380px){.site-wrap{padding:0 14px}.site-header nav{gap:13px;font-size:10px}.brand-title{font-size:23px}h1{font-size:28px}.scene-shell{height:420px;min-height:420px}.scene-angle{right:12px}.scene-heading{left:12px;font-size:9px}.view-buttons button{font-size:10px;padding:9px 5px}.term-detail{padding:22px 18px 0}.detail-tabs{gap:17px}.song-verse{font-size:25px;gap:1px}.song-verse button{min-width:31px}.song-line{gap:12px}.time-controls{padding-left:13px;padding-right:13px}.date-picker-label input{font-size:10px}.season-terms button{font-size:11px}.season-row{gap:6px}.today-button{font-size:9px}.date-controls{gap:4px}}.scene-bottom{pointer-events:none}.scene-bottom button{pointer-events:auto}.month-labels{position:relative;height:32px;display:block}.month-labels>span{position:absolute;top:1px}.history-timeline p,.culture-values p,.method-grid p{font-size:13px;line-height:1.95}.regional-note,.song-line p,.asset-credit p{font-size:11px}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}.calculation-notice{display:flex;align-items:baseline;gap:12px;margin:-7px 0 20px;padding:11px 14px;border-left:2px solid #b49a6a60;background:#b49a6a08;font-size:11px;line-height:1.9;color:#8f9da8}.calculation-notice strong{color:#c6b797;font-weight:400;white-space:nowrap}.calculation-notice.unavailable{background:#b49a6a10;border-color:#c9ad7d;color:#bcb5a5}.unavailable-instant{font-size:12px;color:#c7b58d;font-weight:400}.year-control{display:flex;align-items:center;gap:5px;margin:0}.year-control label{margin-right:4px}.year-control input{width:78px;min-width:0;background:#151e28;color:#c9d2d8;border:1px solid var(--line);border-radius:4px;padding:6px 8px;font-size:12px;font-variant-numeric:tabular-nums}.year-control button{display:inline-flex;align-items:center;justify-content:center;min-height:29px;padding:5px 7px;border:1px solid var(--line);border-radius:4px;background:transparent;color:#b7bdba;font-size:10px}.year-control button:hover{background:#27323a;color:var(--gold)}.calendar-note{font-size:10px;color:#8594a0;margin-top:12px;line-height:1.8}.time-meta{flex-wrap:wrap}@media(max-width:700px){.calculation-notice{display:block;margin:0 0 17px;font-size:11px;padding:11px 13px}.calculation-notice strong{display:block;margin-bottom:3px}.year-control input{width:83px;font-size:16px;padding:7px 8px}.year-control button{min-width:36px;min-height:36px;font-size:11px}.time-meta{gap:14px 18px}.calendar-note{font-size:11px}}.header-tools{display:flex;align-items:center;gap:18px;flex-shrink:0}.language-switch{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:54px;min-height:34px;padding:6px 9px;border:1px solid #baa77950;border-radius:5px;background:transparent;color:#d0bd98;font-size:11px;white-space:nowrap}.language-switch:hover{background:#bda07915;border-color:#c5ad7a}.term-subtitle{font-size:11px;color:#8d9eaa;margin:-4px 0 14px;letter-spacing:.6px}.scene-label-layer[data-locale=en] .orbit-label{letter-spacing:0;font-size:10px}.scene-label-layer[data-locale=en] .orbit-label.cardinal{font-size:11px}.scene-label-layer[data-locale=en] .body-label{letter-spacing:0}.song-verse[lang=zh-CN],.term-seal[lang=zh-CN],.term-subtitle [lang=zh-CN]{font-family:"Noto Serif SC",Songti SC,SimSun,serif}html[lang=en]{--serif:Georgia,"Times New Roman",serif}html[lang=en] h1{letter-spacing:-.6px}html[lang=en] .observatory-intro>div:first-child{min-width:0}html[lang=en] .observatory-intro p{letter-spacing:0}html[lang=en] .brand-title{letter-spacing:1px}html[lang=en] .brand-title>span{letter-spacing:.4px;font-family:inherit;font-size:11px}html[lang=en] .site-header nav{letter-spacing:0;gap:25px}html[lang=en] .term-title-row{gap:10px}html[lang=en] .term-title-row h2{font-size:31px;line-height:1.18;letter-spacing:0;min-width:0}html[lang=en] .term-seal{flex-shrink:0}html[lang=en] .detail-topline{flex-wrap:wrap;gap:9px}html[lang=en] .term-meaning{font-size:12px;line-height:1.75;min-height:0}html[lang=en] .term-coordinates{gap:18px}html[lang=en] .term-coordinates>div{flex:1;min-width:0}html[lang=en] .term-coordinates span{min-height:25px;line-height:1.4}html[lang=en] .term-instant time{font-size:11px;letter-spacing:0}html[lang=en] .term-instant small{line-height:1.65}html[lang=en] .term-content{min-height:150px}html[lang=en] .term-content>p{font-size:12px;line-height:1.8}html[lang=en] .next-term>div{gap:6px;align-items:baseline}html[lang=en] .next-term strong{font-size:14px}html[lang=en] .next-term small{font-size:9px}html[lang=en] .next-term>svg{flex-shrink:0}html[lang=en] .scene-angle>span{max-width:200px;line-height:1.4;text-align:right}html[lang=en] .scene-notes{max-width:90%;line-height:1.5}html[lang=en] .scene-heading{letter-spacing:.2px}html[lang=en] .gesture-hint{letter-spacing:0}html[lang=en] .season-letter{width:54px;font-size:14px;letter-spacing:0}html[lang=en] .season-terms button{white-space:normal;font-size:11px;line-height:1.4;justify-content:space-between;min-height:68px}html[lang=en] .season-terms button small{white-space:nowrap}html[lang=en] .section-heading h2,html[lang=en] .index-heading h2,html[lang=en] .song-intro h2{letter-spacing:0}html[lang=en] .song-line p{font-size:11px;line-height:1.8}html[lang=en] .song-season{font-size:11px;min-width:36px}html[lang=en] .song-stamp{writing-mode:horizontal-tb;letter-spacing:1px}html[lang=en] .history-timeline h3{font-size:15px;line-height:1.5}html[lang=en] .history-date{letter-spacing:0;font-size:13px}html[lang=en] .culture-values h3{letter-spacing:0;line-height:1.5}html[lang=en] .footer-brand{letter-spacing:1px}html[lang=en] .footer-brand span{letter-spacing:0}@media(max-width:1150px){.site-header{gap:18px}.header-tools{gap:13px}html[lang=en] .site-header nav{gap:20px}html[lang=en] .term-title-row h2{font-size:28px}html[lang=en] .view-buttons button{padding:7px;font-size:10px}html[lang=en] .time-meta{gap:16px}}@media(max-width:900px){html[lang=en] h1{font-size:34px}html[lang=en] .observatory-intro{gap:18px}html[lang=en] .date-status time{font-size:11px}html[lang=en] .scene-heading{max-width:43%;line-height:1.4;align-items:flex-start}html[lang=en] .scene-angle>span{max-width:145px;font-size:9px}html[lang=en] .season-letter{width:60px}html[lang=en] .season-terms button{min-height:65px}html[lang=en] .footer-brand span{max-width:210px;line-height:1.6}html[lang=en] .song-section{grid-template-columns:1fr 1.5fr}}@media(max-width:700px){.site-header{gap:9px}.site-header nav{gap:13px}.language-switch{min-width:44px;min-height:40px;padding:5px;font-size:10px}.language-switch>svg{display:none}.header-tools{gap:0}html[lang=en] .site-header nav{gap:12px;font-size:10px}html[lang=en] .brand-title{font-size:23px;letter-spacing:0}html[lang=en] .brand-emblem{width:28px}html[lang=en] .brand-emblem svg{width:23px}html[lang=en] h1{font-size:33px;line-height:1.25}html[lang=en] h1 em{display:block}html[lang=en] .observatory-intro p{font-size:12px}html[lang=en] .date-status{align-items:flex-start;flex-wrap:wrap}html[lang=en] .date-status>span{font-size:10px}html[lang=en] .date-status time{font-size:11px}html[lang=en] .scene-heading{font-size:10px;max-width:42%}html[lang=en] .scene-angle>span{max-width:140px}html[lang=en] .scene-notes,html[lang=en] .gesture-hint{font-size:9px}html[lang=en] .view-buttons button{font-size:10px;padding:8px 5px;gap:4px}html[lang=en] .view-buttons svg{width:13px}html[lang=en] .term-title-row h2{font-size:31px}html[lang=en] .term-content{min-height:145px}html[lang=en] .term-content>p,html[lang=en] .term-meaning{font-size:13px}html[lang=en] .term-instant time{font-size:12px}html[lang=en] .term-instant small{font-size:10px}html[lang=en] .timeline-label{gap:14px;line-height:1.5}html[lang=en] .timeline-label>span{max-width:53%;text-align:right}html[lang=en] .month-labels{font-size:9px}html[lang=en] .season-row{align-items:flex-start;gap:9px}html[lang=en] .season-letter{width:44px;font-size:11px;padding-top:10px}html[lang=en] .season-terms{grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}html[lang=en] .season-terms button{font-size:11px;min-height:68px;padding:8px 5px}html[lang=en] .song-section{display:block}html[lang=en] .song-season{font-size:9px;min-width:33px}html[lang=en] .song-line{gap:10px}html[lang=en] .song-verse{font-size:26px;letter-spacing:1px;gap:2px}html[lang=en] .song-verse button{min-width:29px}html[lang=en] .song-line p{font-size:11px}html[lang=en] .summer-choices{flex-wrap:wrap}html[lang=en] .history-date{font-size:14px}html[lang=en] .footer-brand span{max-width:180px}html[lang=en] .site-footer>a:last-child{max-width:100px;text-align:right;line-height:1.7}}@media(max-width:380px){.site-header nav{gap:10px}.site-header{gap:6px}html[lang=en] .brand-title{font-size:20px}html[lang=en] .site-header nav{gap:8px;font-size:10px}html[lang=en] h1{font-size:30px}html[lang=en] .scene-heading{max-width:40%;font-size:9px}html[lang=en] .scene-angle>span{max-width:130px}html[lang=en] .song-verse{font-size:23px;gap:0}html[lang=en] .song-verse button{min-width:27px}html[lang=en] .song-season{min-width:30px}html[lang=en] .date-picker-label input{font-size:10px}}