@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;500;600&family=DM+Sans:wght@400;500;600;700&display=swap');
:root{color-scheme:dark;--bg:#090f18;--panel:#101a27;--border:#26313f;--text:#ecede8;--muted:#9ba9b9;--gold:#e5ba80;--solar:#f4b760;--lunar:#9fb8da;--comet:#7cc4be;--star:#e9cb96}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:'DM Sans','PingFang SC','Microsoft YaHei',sans-serif;font-size:16px;line-height:1.65}button,a,input{ -webkit-tap-highlight-color:transparent}button{cursor:pointer;font:inherit;color:inherit;background:none;border:0}button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--gold);outline-offset:5px}a{color:var(--gold);text-decoration:none}a:hover{text-decoration:underline}button:hover{color:var(--gold)}.topbar{height:92px;border-bottom:1px solid var(--border);max-width:1320px;margin:auto;padding:0 48px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:15px;letter-spacing:2px;font-weight:500}.brandmark{font-size:38px;color:var(--gold);line-height:1}.brand small{display:block;font-size:12px;letter-spacing:2px;color:var(--muted);font-weight:400;margin-top:3px}.quiet{color:var(--muted);font-size:14px;padding:8px 0}main{max-width:1320px;margin:auto;padding:34px 48px 0}.intro{display:flex;justify-content:space-between;align-items:center;margin-bottom:30px}.eyebrow{font-size:13px;color:var(--gold);letter-spacing:1.7px;margin:0 0 8px}.eyebrow span{margin-left:15px;color:var(--muted);letter-spacing:.5px}h1,h2{font-family:'Noto Serif SC','Songti SC',serif;font-weight:500}h1{font-size:34px;letter-spacing:2px;margin:4px 0 10px;line-height:1.4}.subheading{margin:0;color:var(--muted);font-size:15px}.decade{display:grid;grid-template-columns:auto 56px auto;gap:12px;align-items:center;font-size:27px;font-weight:400;color:#ced7de}.decade i{height:1px;background:var(--gold)}.decade small{grid-column:1/4;text-align:right;color:var(--muted);font-size:13px;letter-spacing:3px}.observatory{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:24px}.sky-panel{border:1px solid var(--border);border-radius:12px;overflow:hidden;background:#0d1825;display:flex;flex-direction:column}.sky-head{display:flex;justify-content:space-between;align-items:center;padding:17px 22px;background:#111d2b;gap:15px}.tiny{display:block;font-size:12px;color:var(--muted);letter-spacing:2px}.sky-head strong{font-size:15px;font-weight:500;display:block;margin-top:4px}.simulation-label{color:#94abba;font-size:12px;border:1px solid #324858;padding:4px 8px;border-radius:4px;white-space:nowrap}.canvas-wrap{position:relative;height:375px;min-width:0;background:#102234}.canvas-wrap canvas{width:100%;height:100%;display:block}.view-label{position:absolute;top:20px;left:22px;font-size:13px;color:#b4c7d5;letter-spacing:1px}.sky-caption{position:absolute;bottom:40px;left:22px;font-size:14px;color:#c4d0d8;max-width:85%;pointer-events:none;text-shadow:0 1px 6px #000}.sky-tools{display:flex;gap:18px;align-items:center;padding:17px 20px;border-top:1px solid var(--border);background:#111d2b}.play{background:var(--gold);color:#111822!important;border-radius:5px;padding:8px 14px;font-size:14px;white-space:nowrap;font-weight:600;min-width:115px}.scrub{flex:1;display:flex;align-items:center;gap:12px;min-width:0}.scrub label,.scrub span{font-size:12px;color:var(--muted);white-space:nowrap}.scrub input{accent-color:var(--gold);width:100%;min-width:25px;cursor:pointer}.icon-button{font-size:13px;color:#b7c5ce;white-space:nowrap;padding:6px}.scene-note{font-size:12px;color:var(--muted);padding:10px 20px;margin:0;line-height:1.7;background:#0e1722}.event-detail{padding:10px 3px 0 7px}.event-kind{font-size:13px;color:var(--muted);display:flex;justify-content:space-between;align-items:center}.event-kind span{border:1px solid #5b4e3e;border-radius:4px;color:var(--gold);padding:2px 8px;font-size:12px}.detail-date{color:var(--gold);font-size:14px;letter-spacing:2px;margin:16px 0 9px}.event-detail h2{font-size:26px;line-height:1.65;margin:0 0 12px;letter-spacing:1px}.event-detail>p:not(.detail-date){color:#b5c0cc;font-size:15px;margin:0 0 20px}.metrics{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:15px 0;margin:20px 0}.metrics div+div{border-left:1px solid var(--border);padding-left:22px}.metrics span{display:block;color:var(--muted);font-size:12px}.metrics strong{display:block;margin-top:4px;font-weight:500;font-size:17px}.visibility{display:flex;gap:10px;background:#18282c;border:1px solid #2b4649;border-radius:6px;padding:12px;margin-bottom:17px}.visibility-icon{color:#83bcb0;font-size:18px}.visibility strong{font-size:14px;font-weight:500;color:#bfdbd2}.visibility p{color:#9eb5b5;font-size:13px;margin:4px 0 0}.event-detail>p.detail-description{font-size:14px;line-height:1.8;margin-bottom:16px}.source-link{font-size:13px;display:inline-block;border-bottom:1px solid #806848;padding-bottom:3px}.section-head{display:flex;justify-content:space-between;align-items:baseline;margin:30px 0 17px}.section-head h2{font-size:20px;margin:0}.section-head p{font-size:13px;color:var(--muted);margin:0}.years{display:grid;grid-template-columns:repeat(10,1fr);border:1px solid var(--border);border-radius:8px;overflow:hidden}.year{position:relative;padding:12px 0 10px;border-right:1px solid var(--border);font-size:17px;color:var(--muted);min-width:0}.year:last-child{border:0}.year.active{background:#252629;color:var(--gold)}.year.active:before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:var(--gold)}.year-dots{height:15px;display:flex;align-items:center;justify-content:center;gap:4px;margin-top:5px}.year-dots i{height:4px;width:4px;border-radius:50%;background:var(--lunar)}.year-dots i.sn{background:var(--star);width:6px;height:6px}.year-dots i.comet{background:var(--comet)}.timeline-key{display:flex;justify-content:flex-end;gap:20px;color:var(--muted);font-size:12px;margin-top:10px}.timeline-key span{display:flex;align-items:center;gap:7px}.timeline-key i{width:6px;height:6px;border-radius:50%}.key-star{background:var(--star)}.key-solar{background:var(--solar)}.key-lunar{background:var(--lunar)}.key-comet{background:var(--comet)}.archive{margin-top:22px}.archive-head{display:flex;justify-content:space-between;align-items:center;gap:20px;padding-bottom:14px;border-bottom:1px solid var(--border)}.filters{display:flex;gap:5px}.filters button{padding:5px 12px;font-size:14px;border-radius:5px;color:var(--muted)}.filters button.active{color:var(--gold);background:#26262a}.local-filter{font-size:12px;color:var(--muted);display:flex;gap:7px;align-items:center}.local-filter input{accent-color:var(--gold)}.event-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px;margin-top:16px}.event-card{border:1px solid var(--border);border-radius:7px;background:#111a26;text-align:left;padding:17px 18px;position:relative}.event-card.selected{border-color:#aa865b;background:#1f2229}.event-card .card-date{font-size:13px;color:var(--muted);letter-spacing:1px}.event-card .card-type{float:right;font-size:12px;color:var(--gold)}.event-card h3{font-weight:500;font-size:17px;margin:8px 0 7px}.event-card p{font-size:13px;color:var(--muted);margin:0;line-height:1.7}.event-card .card-icon{font-size:21px;margin-right:7px;color:var(--gold)}.archive-note{color:var(--muted);font-size:12px;margin-top:14px}.empty{grid-column:1/-1;padding:25px 0;color:var(--muted);font-size:15px}footer{display:flex;justify-content:space-between;align-items:center;padding:22px 0;gap:18px;color:var(--muted);font-size:12px}footer span{color:#cad1d5;letter-spacing:1px}footer p{margin:0;font-size:12px}dialog{width:min(700px,calc(100vw - 32px));max-height:85vh;overflow:auto;border:1px solid #40505f;border-radius:10px;background:#101b28;color:var(--text);padding:28px 32px;line-height:1.85}dialog::backdrop{background:#000b;backdrop-filter:blur(4px)}.dialog-top{display:flex;align-items:center;justify-content:space-between}.dialog-top button{font-size:28px;color:var(--muted)}dialog h2{font-size:24px;line-height:1.6;margin:12px 0 24px}dialog h3{font-size:16px;font-weight:500;color:var(--gold);margin:23px 0 5px}dialog p,dialog li{font-size:14px;color:#b5c0cc}dialog a{font-size:14px}dialog ul{padding-left:20px}.method-note{border:1px solid var(--border);border-radius:6px;padding:12px 15px} @media(min-width:1450px){.canvas-wrap{height:420px}}@media(max-width:1000px){.topbar{padding:0 28px}main{padding:28px 28px 0}.observatory{grid-template-columns:minmax(0,1fr) 290px;gap:19px}.event-detail h2{font-size:24px}.simulation-label{display:none}.sky-tools{gap:10px;padding:15px}.scrub label,.scrub span{display:none}.event-list{grid-template-columns:repeat(2,minmax(0,1fr))}.decade{display:none}}@media(max-width:750px){.topbar{height:77px;padding:0 20px}.brand{font-size:15px;gap:10px}.brandmark{font-size:30px}.brand small{font-size:10px}.quiet{font-size:12px}main{padding:25px 18px 0}h1{font-size:27px;letter-spacing:1px}.eyebrow{font-size:12px}.eyebrow span{display:block;margin:4px 0 0;font-size:11px}.subheading{font-size:13px}.intro{margin-bottom:23px}.observatory{grid-template-columns:1fr;gap:24px}.canvas-wrap{height:340px}.sky-head{padding:13px 16px}.sky-head strong{font-size:14px}.view-label{left:16px}.sky-caption{left:16px;font-size:12px}.scene-note{padding:10px 15px}.event-detail{padding:0 3px}.event-detail h2{font-size:25px;line-height:1.5}.event-detail h2 br{display:none}.event-detail>p:not(.detail-date){margin-bottom:14px}.detail-date{margin:10px 0 6px}.metrics{margin:15px 0;padding:12px 0}.years{grid-template-columns:repeat(5,1fr)}.year{padding:10px 0;font-size:16px}.year:nth-child(-n+5){border-bottom:1px solid var(--border)}.year:nth-child(5){border-right:0}.section-head{gap:10px}.section-head h2{font-size:19px}.section-head p{font-size:11px}.archive-head{flex-wrap:wrap;gap:12px}.filters{width:100%;justify-content:space-between;gap:0}.filters button{font-size:13px;padding:5px 9px}.event-list{grid-template-columns:1fr}footer{flex-wrap:wrap;gap:8px;padding:20px 0}footer p{order:3;flex-basis:100%;font-size:11px}dialog{padding:20px}dialog h2{font-size:20px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}

.head-actions{display:flex;gap:12px;align-items:center}.head-actions .quiet{font-size:12px;color:var(--gold);white-space:nowrap}.year-dots{gap:3px}.sky-head .head-actions[hidden]{display:none}
.brand small.site-author{font-size:13px;letter-spacing:.25px;color:var(--muted);line-height:1.5;margin-top:4px}.site-author .author-name{color:var(--gold);font-weight:500}.footer-author{letter-spacing:.25px}@media(max-width:750px){.brand small.site-author{font-size:12px;letter-spacing:.1px}}

.topbar-actions{display:flex;align-items:center;gap:24px}.language-control select{font:inherit;font-size:13px;color:var(--gold);background:#111d2b;border:1px solid #40505f;border-radius:5px;padding:7px 26px 7px 10px;cursor:pointer}.language-control select:focus-visible{outline:2px solid var(--gold);outline-offset:4px}.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}.brand small.site-author{color:var(--gold)}footer{border-top:1px solid var(--border);margin-top:30px}html[lang=en] .brand{letter-spacing:.4px}html[lang=en] h1{letter-spacing:0;font-size:32px}html[lang=en] .event-detail h2{letter-spacing:0;font-size:24px;line-height:1.4}html[lang=en] .sky-head strong{font-size:13px}html[lang=en] .event-card .card-type{float:none;display:block;margin-top:2px}html[lang=en] .view-label{font-size:12px;letter-spacing:0}html[lang=en] .head-actions{gap:8px}html[lang=en] .simulation-label{white-space:normal;max-width:130px}html[lang=en] .sky-tools{gap:10px}html[lang=en] .play{min-width:100px;padding:8px 10px}html[lang=en] .scrub{gap:8px}html[lang=en] .scrub label,html[lang=en] .scrub span{white-space:normal;font-size:10px;line-height:1.3}html[lang=en] .metrics strong{font-size:15px}@media(max-width:750px){.topbar{min-height:92px;height:auto;padding-top:12px;padding-bottom:12px;gap:12px}.topbar-actions{gap:6px;flex-direction:column;align-items:flex-end}.topbar-actions .quiet{padding:0;font-size:10px}.language-control select{font-size:12px;padding:5px 22px 5px 8px}.brand{letter-spacing:.5px;max-width:65%}html[lang=en] .brand{font-size:13px}html[lang=en] .brand small.site-author{font-size:11px}html[lang=en] h1{font-size:27px}html[lang=en] .section-head{align-items:flex-start}html[lang=en] .section-head p{max-width:145px;text-align:right}html[lang=en] .filters button{font-size:11px;padding:5px 6px}html[lang=en] .sky-head strong{font-size:12px}html[lang=en] .sky-caption{max-width:88%;font-size:11px}html[lang=en] .view-label{font-size:11px;max-width:90%}html[lang=en] .icon-button{font-size:12px}html[lang=en] .sky-head{gap:8px}}