:root{--paper:#f6f2e9;--white:#fffcf6;--ink:#242a24;--muted:#5e645b;--line:#dcd6c8;--red:#96352e;--jade:#416252;--serif:"Noto Serif SC","Songti SC","SimSun",serif;--sans:"Noto Sans SC","Microsoft YaHei","PingFang SC",sans-serif}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.65 var(--sans)}
button,select{font:inherit;color:inherit}
button{cursor:pointer}
a{color:inherit;text-decoration:none}
button:focus-visible,a:focus-visible,summary:focus-visible,select:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--red);outline-offset:3px}
h1,h2,h3,p,figure{margin:0}
h1,h2,h3{font-family:var(--serif);line-height:1.3}
button{border:1px solid var(--line);background:var(--white);border-radius:7px}
button:not(:disabled):hover{border-color:var(--red)}
button:disabled{opacity:.35;cursor:default}
[hidden]{display:none!important}
section[id]{scroll-margin-top:14px}
.wrap{width:min(1280px,calc(100% - 72px));margin-inline:auto}
.skip{position:absolute;left:16px;top:-80px;background:var(--white);padding:10px;z-index:9}
.skip:focus{top:8px}
.mast{border-bottom:1px solid var(--line)}
.topbar{min-height:66px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:720;font-size:15px;letter-spacing:.07em}
.seal{display:grid;place-items:center;width:35px;height:35px;background:var(--red);color:#fffaf1;font:700 23px var(--serif);border-radius:5px}
nav{display:flex;gap:28px;font-size:14px;color:var(--muted)}
nav a{padding-block:8px}
nav a:hover,.site-footer a:hover{color:var(--red)}
.intro{padding:30px 0 26px;display:flex;align-items:end;justify-content:space-between;gap:20px}
.overline{font-size:12px;letter-spacing:.12em;color:var(--red);display:flex;align-items:center;gap:10px;font-weight:700}
.overline>span{width:18px;height:1px;background:currentColor}
.overline>i{width:4px;height:4px;border-radius:100%;background:currentColor;opacity:.55}
h1{font-size:clamp(34px,4.1vw,61px);font-weight:750;letter-spacing:-.045em;margin:7px 0 8px}
h1 span{color:var(--red)}
.intro p,.section-head p{color:var(--muted)}
.primary{background:var(--red);color:#fff8ee;padding:10px 16px;border-color:var(--red);white-space:nowrap;font-weight:700;min-height:44px}
.primary:hover{background:#7e2c25}
.play-icon{margin-right:6px;font-size:10px}
.explorer{border:1px solid var(--line);border-radius:13px;background:var(--white);overflow:hidden;display:grid;grid-template-columns:minmax(0,1fr) minmax(275px,330px)}
.map-head,.timeline{grid-column:1/-1}
.map-head{min-height:56px;padding:8px 16px;display:flex;justify-content:space-between;align-items:center;gap:8px;border-bottom:1px solid var(--line)}
.map-head>div{display:flex;align-items:center;gap:11px;min-width:0}
.map-head strong{font-size:15px;line-height:1.3}
.map-year{font:700 29px Georgia,var(--serif);font-variant-numeric:lining-nums;color:var(--red)}
.map-head-divider{height:20px;width:1px;background:var(--line);flex:none}
.soft{background:#f7f3e9;min-height:40px;padding:6px 11px;white-space:nowrap;font-size:13px}
.map-column{min-width:0;border-right:1px solid var(--line)}
.map-shell{position:relative;background:#dce8df;overflow:hidden}
.map-host{height:clamp(367px,38vw,485px);width:100%;position:relative}
.cartography{width:100%;height:100%;display:block;touch-action:pan-y;user-select:none}
.cartography.draggable{cursor:grab}
.cartography.dragging{cursor:grabbing}
.map-label{pointer-events:none;font-family:var(--sans);paint-order:stroke;stroke:#f4f0e3;stroke-width:2.8;stroke-linejoin:round}
.map-label.water{stroke:#dce8df;fill:#415e57;font-family:var(--serif);letter-spacing:.1em}
.map-label.context{fill:#626253;font-family:var(--serif);letter-spacing:.1em}
.map-point{cursor:pointer}
.map-point:focus-visible,.territory:focus-visible{outline:none}
.map-point:focus-visible .marker,.map-point:hover .marker{stroke:#242a24;stroke-width:2.8}
.territory{cursor:pointer}
.territory-qing{fill:#bfcda5;stroke:#365a43}
.territory-ming{fill:#ecd6b2;stroke:#825020}
.territory-former{fill:#d0d7c0;stroke:#536251}
.territory:focus-visible,.territory:hover{stroke-width:3}
.territory-name{fill:#323b2d;font-weight:750;letter-spacing:.12em}
.key.area{border-color:#365a43}.key.otherArea{background:#ecd6b2;border-color:#825020}
.key.formerArea{background:#d0d7c0;border:1px dashed #536251;width:17px}
.plate-link{align-self:start;white-space:normal}
.story-steps{display:flex;flex-wrap:wrap;gap:7px;margin:13px 0 19px;padding:0;list-style:none}
.story-steps li{padding:5px 8px;border:1px solid var(--line);border-radius:5px;font-size:13px}
.story-steps b{color:var(--red)}
#detail-content p + p{margin-top:7px}
.map-mode,.map-toast{position:absolute;left:13px;background:rgba(255,252,246,.95);border:1px solid var(--line);font-size:11px;color:#424b40;padding:5px 8px;border-radius:5px;max-width:calc(100% - 84px);pointer-events:none}
.map-mode{top:13px}
.map-toast{bottom:13px}
.compass{position:absolute;top:11px;right:19px;text-align:center;color:#38554a;font:700 12px var(--serif);pointer-events:none}
.compass span{display:block;margin:4px auto 0;border-left:5px solid transparent;border-right:5px solid transparent;border-bottom:16px solid currentColor}
.zoom-controls{position:absolute;right:12px;bottom:12px;display:grid;gap:4px}
.zoom-controls button{width:40px;height:40px;font:22px Georgia,serif;box-shadow:0 1px 4px #25282216}
.map-footer{border-top:1px solid var(--line);padding:9px 13px;display:flex;align-items:start;justify-content:space-between;gap:8px}
.legend{display:flex;flex-wrap:wrap;gap:5px 12px;color:#444c42;font-size:11px}
.legend span{display:inline-flex;align-items:center;gap:5px;white-space:nowrap}
.key{width:11px;height:11px;display:inline-block;flex:none;background:var(--point,#536a52);border:1px solid #544b3c}
.key.admin,.key.tributary{border-radius:50%}.key.tributary{background:transparent;border:2px solid #6b547e}
.key.local,.key.treaty{transform:rotate(45deg);width:8px;height:8px;margin-inline:2px}
.key.lease,.key.war{background:repeating-linear-gradient(135deg,#fff8e8 0 2px,var(--point) 2px 4px)}
.key.port{border-radius:50%;background:#faf5e8;border:2px solid #397169}
.key.area{background:#c4d1a9;border:1px dashed #52634d;width:17px}.key.otherArea{background:#e2d5bd;border:1px dashed #746854;width:17px}
.map-notes{font-size:11px;min-width:60px;text-align:right;color:var(--jade)}
.map-notes summary{cursor:pointer;white-space:nowrap;padding:0 2px}
.map-notes>div{min-width:min(345px,57vw);text-align:left;color:var(--muted);padding:7px 2px}
.side{padding:18px;min-width:0;display:flex;flex-direction:column;gap:11px}
.side h2{font-size:24px}
.side .side-copy{font-size:13px;color:var(--muted)}
.side-kicker{color:var(--red);font-size:11px;font-weight:700;letter-spacing:.08em}
.side-list{border-top:1px solid var(--line);display:grid}
.side-event,.link-button{background:none;text-align:left;border:0;border-radius:0}
.side-event{display:grid;grid-template-columns:43px 1fr 15px;gap:6px;align-items:center;border-bottom:1px solid var(--line);padding:9px 0;font-size:13px;line-height:1.4;min-height:42px}
.side-event span:first-child{color:var(--red);font-family:Georgia,serif}
.side-event:hover,.link-button:hover{color:var(--red)}
.side-picture{position:relative;display:block;margin-top:auto;border:0;padding:0;overflow:hidden;height:112px;text-align:left;border-radius:7px;background:#e7e0cf}
.side-picture img{height:100%;width:100%;object-fit:cover;object-position:center 43%}
.side-picture span{position:absolute;left:8px;bottom:7px;background:#fffcf2ee;color:#363b30;padding:2px 6px;font-size:11px;border-radius:3px}
.region-shortcuts{display:flex;flex-wrap:wrap;gap:5px}
.region-shortcuts button{padding:4px 8px;min-height:33px;font-size:11px}
.links{display:flex;gap:6px 13px;flex-wrap:wrap;margin-top:8px;font-size:12px;color:var(--jade)}
.links a,.citation{color:var(--jade);text-decoration:underline;text-underline-offset:3px}
.timeline{padding:9px 15px 13px;border-top:1px solid var(--line);background:#f8f5ed}
.timeline-head{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:5px}
.timeline-head strong{margin-right:10px}
.timeline-head span,.tour-status{font-size:12px;color:var(--muted)}
.arrows{display:flex;gap:5px}
.arrows button{width:37px;height:36px;font-size:17px}
.rail{display:flex;gap:5px;overflow-x:auto;padding:4px 3px 9px;scrollbar-width:thin;scrollbar-color:#b3a997 transparent}
.rail button{min-width:94px;min-height:58px;flex:1 0 auto;padding:6px 7px;text-align:left;background:#fbf8ef;border-radius:6px}
.rail button b,.rail button small{display:block}
.rail button b{font:700 20px Georgia,serif}
.rail button small{font-size:11px;line-height:1.3;margin-top:4px}
.rail button[aria-current=true]{background:var(--red);color:#fff9ee;border-color:var(--red)}
.tour-status{padding:5px 3px 0}
.compare-panel,.content-section{margin-top:45px}
.compare-panel{background:#fcf9f2;border:1px solid var(--line);border-radius:12px;padding:21px}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:15px;margin-bottom:17px}
h2{font-size:clamp(27px,3vw,39px);letter-spacing:-.025em}
.section-head p{margin-top:5px;font-size:14px}
.section-head .overline{margin-bottom:6px}
.compare-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.compare-grid label{font-size:13px;margin-right:8px}
.compare-grid select{background:var(--white);border:1px solid var(--line);border-radius:5px;max-width:100%;padding:7px}
.mini-map{height:255px;background:#dce8df;margin-top:8px;border-radius:6px;overflow:hidden;position:relative}
.mini-note{position:absolute;bottom:5px;left:5px;padding:2px 5px;border-radius:4px;background:var(--white);color:var(--ink);font-size:10px}
.diff-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:10px}
.diff-list article{background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:10px;font-size:13px}
.diff-list strong{display:block;color:var(--red)}
.tally{white-space:nowrap;color:var(--red);font-size:13px}
.chapter-tabs,.event-filters{display:flex;gap:7px;flex-wrap:wrap}
.chapter-tabs button,.event-filters button{min-height:42px;padding:6px 12px}
.chapter-tabs button[aria-pressed=true]{background:var(--jade);color:white;border-color:var(--jade)}
.chapter-intro{color:var(--muted);margin:10px 0;font-size:14px}
.event-filters button{font-size:12px;background:none;min-height:37px}
.event-filters button[aria-pressed=true]{border-color:var(--red);color:var(--red);background:#fff7ec}
.event-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:13px}
.event-card{display:flex;flex-direction:column;align-items:start;gap:6px;text-align:left;min-height:139px;padding:14px}
.card-date{font-size:12px;color:var(--red);font-weight:700}
.card-title{font:700 20px/1.3 var(--serif)}
.card-copy{font-size:13px;color:var(--muted)}
.event-card .card-more{font-size:12px;color:var(--jade);margin-top:auto}
.questions,.gallery{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.questions{margin-top:12px}
.questions button{display:grid;text-align:left;padding:13px;background:#eee9dc}
.questions b{font-size:15px}
.questions span{color:var(--muted);font-size:12px}
.gallery button{overflow:hidden;padding:0;text-align:left;display:block}
.gallery img,.gallery-fallback{display:block;width:100%;aspect-ratio:16/8.5;object-fit:cover;background:#e9e3d4}
.gallery-fallback{align-content:center;text-align:center;color:var(--muted)}
.gallery strong{font-family:var(--serif);display:block;margin:9px 11px 0}
.gallery small{display:block;color:var(--muted);margin:0 11px 9px}
.bibliography{margin-top:14px;background:var(--white);border:1px solid var(--line);border-radius:7px;padding:11px 13px;font-size:14px}
summary{cursor:pointer}
#bibliography{margin:12px 0 4px;color:var(--muted)}
#bibliography p{margin-bottom:8px}
.site-footer{margin-top:38px;border-top:1px solid var(--line);padding:19px 0 24px;display:flex;justify-content:space-between;gap:12px;font-size:12px;color:var(--muted)}
dialog{border:1px solid var(--line);border-radius:11px;background:var(--white);color:var(--ink);padding:0;width:min(660px,calc(100% - 24px));max-height:calc(100% - 28px);box-shadow:0 18px 55px #25282044;overscroll-behavior:contain}
dialog::backdrop{background:#24292166}
.dialog-top{position:sticky;top:0;background:var(--white);z-index:1;display:flex;justify-content:space-between;align-items:center;padding:7px 16px;border-bottom:1px solid var(--line);color:var(--muted);font-size:12px}
.close{width:40px;height:40px;font-size:23px}
#detail-content{padding:18px 22px 23px}
#detail-content h2{font-size:clamp(27px,5vw,42px);margin:4px 0 6px}
#detail-content h3{font-size:18px;margin:12px 0 3px}
#detail-content p{font-size:14px;color:var(--muted)}
.detail-actions{display:flex;flex-wrap:wrap;gap:6px;margin:13px 0}
.detail-actions button{padding:6px 10px;min-height:41px;font-size:13px}
.detail-image{margin:14px 0 8px}
.detail-image img{width:100%;display:block;max-height:420px;object-fit:contain;border-radius:6px;background:#ede7d9}
.detail-image figcaption{font-size:12px;margin-top:6px;color:var(--muted)}
.no-script{color:var(--red)}
@media(max-width:1000px){.wrap{width:calc(100% - 40px)}.explorer-grid{grid-template-columns:minmax(0,1fr) minmax(235px,29%)}.side{padding:13px}.body{font-size:14px}.map-host{height:390px}}
@media(max-width:700px){.wrap{width:calc(100% - 24px)}.topbar{min-height:53px;gap:8px}.seal{width:29px;height:29px;font-size:19px}.brand{font-size:12px;gap:5px;letter-spacing:0}nav{gap:8px;font-size:11px}.intro{padding:19px 0 14px;align-items:start;flex-direction:column;gap:9px}h1{font-size:clamp(28px,7.1vw,45px);margin:5px 0}.intro p{font-size:13px}.primary{min-height:42px;padding:7px 11px;font-size:13px}.explorer-grid{display:flex;flex-direction:column}.map-column{border-right:0}.map-host{height:clamp(245px,64vw,365px)}.map-head{padding-inline:8px}.map-head strong{font-size:13px}.map-year{font-size:25px}.map-head>div{gap:6px}.map-head .soft{padding-inline:6px;font-size:12px}.map-mode{left:6px;top:7px;font-size:10px}.zoom-controls{right:5px;bottom:5px}.zoom-controls button{width:42px;height:42px}.compass{right:13px}.map-footer{padding:6px;gap:5px}.legend{gap:4px 8px;font-size:10px}.side{padding:12px 9px;border-top:1px solid var(--line);max-height:none}.side h2{font-size:22px}.side-picture{display:none}.timeline{padding:6px 7px 5px}.rail button{min-width:82px}.compare-panel,.content-section{margin-top:28px}.compare-panel{padding:9px}.mini-map{height:150px}.diff-list,.event-grid,.gallery{grid-template-columns:repeat(2,minmax(0,1fr))}.questions{grid-template-columns:1fr}.event-card{padding:10px;min-height:145px}.card-title{font-size:17px}.section-head{align-items:start}.chapter-tabs button,.event-filters button{padding-inline:8px}.tally{font-size:11px}.site-footer{margin-top:24px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}}
@media(max-width:1000px){.explorer{grid-template-columns:minmax(0,1fr) minmax(235px,29%)}}
@media(max-width:700px){.explorer{grid-template-columns:minmax(0,1fr);grid-template-areas:"header" "map" "timeline" "side"}.map-head{grid-area:header}.map-column{grid-area:map}.timeline{grid-area:timeline}.side{grid-area:side}}