:root{--paper:#f6f5f0;--ink:#1d3436;--muted:#657473;--line:#dbded7;--teal:#185c57;--dark:#16363b;--accent:#efbd80;--serif:'Noto Serif SC','Songti SC',STSong,serif;--sans:-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei',sans-serif}
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@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

@media(max-width:720px){.map-place,.marker text{display:none}.era-tab small{white-space:nowrap}}

/* A colorful field journal: each chapter has its own ink, sea and signal. */
:root{--paper:#fffaf0;--ink:#21334d;--muted:#626f82;--line:#dce2eb;--teal:#3157b8;--dark:#172d63;--accent:#ffd06c;--track:#d7dfed;--soft:#edf1ff;--sea-light:#2d54a4;--land-light:#b1dec0;--land-dark:#69b29f;--land-edge:#d8f2d4;--map-text:#dfedee}
body[data-era="origin"]{--teal:#a85127;--dark:#683221;--accent:#ffe087;--soft:#fff0d8;--sea-light:#9c4c2f;--land-light:#f3d79f;--land-dark:#daa66f;--land-edge:#fff0c4;--map-text:#fff2d5;--track:#ead2be}
body[data-era="medieval"]{--teal:#08766f;--dark:#064c56;--accent:#ffce68;--soft:#e4f5ed;--sea-light:#0d7a82;--land-light:#b8e3c4;--land-dark:#67bfa5;--land-edge:#e0f5d2;--map-text:#dffaf0;--track:#cce5dc}
body[data-era="connections"]{--teal:#126fa3;--dark:#073854;--accent:#ffb367;--soft:#e5f4fa;--sea-light:#167eb1;--land-light:#d0e5b2;--land-dark:#88c7aa;--land-edge:#f1efca;--map-text:#e4f5f6;--track:#cee4ed}
body[data-era="revolution"]{--teal:#a74442;--dark:#4f2946;--accent:#ffd477;--soft:#fff0e6;--sea-light:#8b4564;--land-light:#f1d2a1;--land-dark:#dcaa7e;--land-edge:#fff0c1;--map-text:#f9e9e3;--track:#e9d4cf}
body[data-era="modern"]{--teal:#6650ad;--dark:#302768;--accent:#8de4d7;--soft:#efedff;--sea-light:#58499a;--land-light:#cbdcdb;--land-dark:#98bfbb;--land-edge:#e9f8eb;--map-text:#efecff;--track:#dcd8ef}
body{background:var(--paper);background-image:radial-gradient(#5a6b8420 .6px,transparent .6px);background-size:9px 9px;color:var(--ink)}
.site-header{height:84px;border:0}.brand-symbol{display:flex;align-items:center;justify-content:center;width:47px;height:47px;border-radius:15px;background:#2e54b5;color:#ffda81;font-size:36px;box-shadow:3px 4px 0 #ffd16d;transition:transform .25s}.brand:hover .brand-symbol{transform:rotate(-8deg)}.brand-name{font-size:31px;letter-spacing:5px}.brand-caption{font-size:12px;border-color:#d0d6df}.brand-caption small{letter-spacing:.8px}.site-header nav{gap:28px}.nav-active{height:auto;border:0;padding:8px 17px;background:#e9eeff;color:#3157b8;border-radius:30px;font-weight:600}.plain{color:#596b86}.plain:hover{color:#3157b8}
.intro{position:relative;min-height:176px;margin:14px 0 25px;align-items:center;gap:20px;isolation:isolate}.intro-copy{position:relative;z-index:1;width:55%;padding:12px 0}.intro .eyebrow{color:#b45e29;font-size:12px;font-weight:600;letter-spacing:1.7px;margin-bottom:12px}.intro .eyebrow span{display:inline-block;margin-right:6px;font-size:18px;color:#eea42c}.intro h1{font:600 clamp(29px,3vw,43px)/1.45 var(--serif);letter-spacing:.5px;white-space:nowrap}.intro h1 span{position:relative;isolation:isolate;color:#2e54b5}.intro h1 span::after{content:'';position:absolute;left:0;right:-2px;bottom:1px;height:10px;background:#ffd173;border-radius:8px 4px;z-index:-1;transform:rotate(-3deg)}.intro-note{color:#6f798a;font-size:14px;line-height:1.8;margin-top:15px}.intro-art{position:absolute;right:-10px;bottom:-2px;width:48%;height:183px;overflow:hidden;z-index:0}.intro-art img{display:block;width:100%;height:100%;object-fit:contain;mix-blend-mode:multiply;transform:translateY(5px)}
.era-tabs{background:transparent;border:0;border-radius:0;gap:10px;overflow:visible;margin-bottom:18px}.era-tab{--tile:#3157b8;--tile-soft:#edf1ff;border:1px solid #cdd7ed;background:var(--tile-soft);border-radius:14px;padding:18px 17px 14px;min-height:99px;overflow:hidden;isolation:isolate;box-shadow:0 2px 0 #2e466408;transition:transform .2s,box-shadow .2s,background .25s}.era-tab:last-child{border-right:1px solid #d2dce9}.era-tab[data-era="origin"]{--tile:#a85127;--tile-soft:#fff0d8;border-color:#ead5b7}.era-tab[data-era="medieval"]{--tile:#08766f;--tile-soft:#e4f5ed;border-color:#c4e0d3}.era-tab[data-era="connections"]{--tile:#126fa3;--tile-soft:#e5f4fa;border-color:#c4dce9}.era-tab[data-era="revolution"]{--tile:#a74442;--tile-soft:#fff0e6;border-color:#edcfc8}.era-tab[data-era="modern"]{--tile:#6650ad;--tile-soft:#efedff;border-color:#d6d0ea}.era-glyph{position:absolute;right:11px;top:8px;font-size:43px;line-height:1;color:var(--tile);opacity:.13;z-index:-1;transition:transform .25s,opacity .25s}.era-tab strong{font-size:16px;font-weight:600;color:var(--tile)}.era-tab .era-no{font:600 12px var(--sans);margin-right:7px;color:var(--tile);opacity:.7}.era-tab small{font-size:12px;padding:0;margin-top:10px;color:#66728a;white-space:nowrap}.era-tab:hover{background:var(--tile-soft);transform:translateY(-3px);box-shadow:0 7px 15px #2c466c16}.era-tab:hover .era-glyph{transform:rotate(15deg);opacity:.25}.era-tab[aria-pressed=true],.era-tab[aria-pressed=true]:hover{background:var(--tile);border-color:var(--tile);box-shadow:0 6px 16px #1c37632b;transform:translateY(-3px)}.era-tab[aria-pressed=true] strong{color:#fff}.era-tab[aria-pressed=true] small,.era-tab[aria-pressed=true] .era-no{color:#fff;opacity:.85}.era-tab[aria-pressed=true] .era-glyph{color:#fff;opacity:.2}
.atlas-shell{border:0;grid-template-columns:minmax(0,1fr) 390px;gap:20px;align-items:stretch}.map-panel{background:var(--dark);border-radius:23px;min-height:480px;box-shadow:0 12px 28px #1a376620;transition:background-color .5s;isolation:isolate}.map-panel::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at 55% 40%,var(--sea-light),transparent 78%);opacity:.65;z-index:-1;pointer-events:none}.map-heading{padding:30px 32px 0}.map-heading h2{color:#fff;font-size:33px;letter-spacing:2px;font-weight:600;margin:8px 0 9px}.map-heading .eyebrow{display:inline-block;color:#fff7e0;background:#ffffff17;padding:5px 10px;border:1px solid #ffffff27;border-radius:20px;letter-spacing:1px}.map-heading p:last-child{font-size:14px;color:var(--map-text)}.map-stamp{color:#ffffffaa;letter-spacing:3px;line-height:1.9;border-left:1px solid #ffffff35;padding-left:15px}.map-stamp span{font-size:12px;color:var(--accent)}.map-wrap{margin:-10px -1% -5px}.map-wrap svg{max-height:430px;filter:drop-shadow(0 10px 12px #00000019)}.sphere{fill:url(#ocean-fill);stroke:#ffffff55;stroke-width:1}.ocean-top{stop-color:var(--sea-light);transition:stop-color .5s}.ocean-bottom{stop-color:var(--dark);transition:stop-color .5s}.land-top{stop-color:var(--land-light);transition:stop-color .5s}.land-bottom{stop-color:var(--land-dark);transition:stop-color .5s}.land{fill:url(#land-fill);stroke:var(--land-edge);stroke-width:.7;transition:stroke .5s}.graticule{stroke:#c2e5ed;stroke-width:.55;opacity:.18}.map-place{fill:var(--dark);opacity:.72;font-size:14px;letter-spacing:3px;font-weight:500}.map-bottom{padding:18px 28px 21px;color:var(--map-text);font-size:12px}.dot{background:var(--accent);width:8px;height:8px;margin-right:7px}.marker .marker-halo{fill:var(--accent);opacity:.16}.marker .marker-core{fill:#fff2ce;stroke:var(--dark);stroke-width:3}.marker.selected .marker-core,.marker:hover .marker-core,.marker:focus .marker-core{fill:var(--accent);stroke:#fff;stroke-width:2.5}.marker.selected .marker-halo{opacity:.4}.marker-ping{fill:none;stroke:var(--accent);stroke-width:1.5;opacity:0;pointer-events:none}.marker.selected .marker-ping{animation:map-ping 1.5s ease-out 2}.marker-caption{fill:#fff8e8;stroke:var(--accent);stroke-width:1.3;filter:drop-shadow(0 2px 4px #00000033);pointer-events:none}.marker text{fill:var(--dark);font:600 14px var(--sans);stroke:none;paint-order:normal}.marker:focus .marker-halo{stroke:#fff;opacity:1;fill:transparent;stroke-width:2}
.story-panel{position:relative;border:1px solid #d9dfeb;border-radius:22px;padding:28px 29px;background:#fff;box-shadow:0 8px 24px #29467309;overflow-wrap:anywhere}:is(.story-panel,.story-content)>.eyebrow{display:inline-block;align-self:flex-start;background:var(--soft);color:var(--teal);border-radius:7px;padding:5px 10px;font-size:12px;letter-spacing:1px;transform:rotate(-1.5deg);margin-bottom:6px}:is(.story-panel,.story-content)>.eyebrow span{font-size:15px;margin-right:6px}.story-date{font:600 25px/1.5 var(--serif);color:var(--teal);margin:14px 0 8px}.story-panel h2{font:600 25px/1.5 var(--serif);color:#22344d;margin:0 0 14px}.story-meta{gap:10px;font-size:12px;margin-bottom:17px;color:#5e6b80}.tag{background:var(--soft);border:0;color:var(--teal);border-radius:5px;padding:3px 8px;font-size:12px;font-weight:600}:is(.story-panel,.story-content)>p:not(.eyebrow):not(.story-date){font-size:16px;line-height:1.85;color:#37475c;margin-bottom:18px}.story-context{padding:13px 15px;border:0;border-radius:10px;background:var(--soft);color:#526277;font-size:14px;line-height:1.8;margin-bottom:19px}.story-context strong{font-size:12px;font-weight:600;color:var(--teal);margin-bottom:6px}.source-link{font-size:12px;color:var(--teal);border-color:var(--track);padding-bottom:6px;line-height:1.7}.story-foot{font-size:12px;border-top:1px solid #edf0f5;margin-top:20px;padding-top:15px}.story-nav button{height:38px;width:38px;border-color:var(--track);font-size:24px;color:var(--teal);background:var(--soft)}.story-nav button:hover{background:var(--teal);color:#fff}.story-nav button:disabled:hover{background:var(--soft);color:var(--teal)}
.timeline-panel{border:1px solid #d5ddeb;border-radius:17px;margin-top:18px;padding:21px 28px 17px;background:#fff;box-shadow:0 6px 18px #29467307}.section-label{font-size:14px;color:var(--teal)}#timeline-date{font:500 17px var(--serif)}.play-button{padding:8px 15px;border:0;border-radius:9px;background:var(--soft);color:var(--teal);font-size:14px;font-weight:600}.play-button:hover,.play-button[aria-pressed=true]{background:var(--teal);color:#fff}.range-wrap{margin-top:19px}.range-wrap input{height:5px;background:var(--track);border-radius:9px}.range-wrap input::-webkit-slider-thumb{width:21px;height:21px;border:4px solid white;background:var(--teal);box-shadow:0 0 0 1.5px var(--teal),0 2px 7px #223d6633}.range-wrap input::-moz-range-thumb{width:13px;height:13px;border:4px solid white;background:var(--teal)}.timeline-tick{background:var(--teal);opacity:.35;height:9px;bottom:43px}.range-labels{margin-top:15px;color:#718097}.timeline-hint{color:#77849a;margin-top:4px}
.events-section{padding:37px 0 40px}.events-heading{margin-bottom:24px}.events-heading .eyebrow{color:var(--teal);letter-spacing:1px}.events-heading h2{font:600 24px/1.5 var(--serif)}.region-filter select{border:1px solid #d1dbea;border-radius:9px;background:#fff;padding:9px 32px 9px 12px}.event-grid{gap:16px}.event-card{border:1px solid #d7dfeb;border-radius:16px;background:#fff;padding:22px 23px 17px;box-shadow:0 4px 0 #e9edf499;overflow:hidden;display:flex;flex-direction:column;transition:transform .22s,box-shadow .22s,background .22s,border-color .22s}.event-card::before{content:'';height:4px;position:absolute;top:0;left:0;right:0;background:var(--teal);opacity:0;transition:opacity .2s}.event-card:hover{background:#fff;border-color:var(--teal);transform:translateY(-4px);box-shadow:0 9px 22px #23447116}.event-card:hover::before,.event-card[aria-pressed=true]::before{opacity:1}.event-card[aria-pressed=true]{background:var(--soft);border-color:var(--teal);box-shadow:0 4px 0 var(--track)}.card-top{font-size:13px;color:var(--teal);font-weight:600;gap:8px}.card-category{font-size:12px;font-weight:500;white-space:nowrap;background:var(--soft);border-radius:6px;padding:3px 7px}.card-category span{font-size:15px;margin-right:3px}.event-card[aria-pressed=true] .card-category{background:#ffffffab}.event-card h3{font:600 20px/1.6 var(--serif);margin:13px 0 8px;color:#273950}.event-card p{font-size:15px;line-height:1.85;color:#657387;margin:0 0 18px}.card-bottom{display:flex;justify-content:space-between;gap:8px;align-items:center;border-top:1px solid #dee5ed;padding-top:10px;font-size:12px;color:#768398;margin-top:auto}.reading-label{color:var(--teal);font-weight:600}.empty-state{border-color:var(--track);background:#fff;border-radius:16px}.empty-state button{color:var(--teal);border-color:var(--track);background:var(--soft);border-radius:7px}
footer{border-color:#d9e1ec;color:#778297;padding:26px 0 30px}.footer-brand{color:#56677e}dialog{background:#fffaf0;border-color:#d6dfee;border-radius:20px;padding:31px 35px;box-shadow:0 20px 80px #15263d55}dialog::backdrop{background:#182e5ca8}.close-button{border-color:var(--track);background:var(--soft);color:var(--teal)}dialog h2{color:var(--teal)}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible,[tabindex]:focus-visible{outline-color:#e48a24}.skip:focus{background:#fff;color:#3157b8;border-radius:10px;top:8px;left:8px}
@keyframes map-ping{0%{r:17px;opacity:.9}90%,100%{r:36px;opacity:0}}
@media(min-width:1450px){.atlas-shell{grid-template-columns:minmax(0,1fr) 420px}.map-wrap svg{max-height:490px}.map-heading{padding:34px 38px 0}.story-panel{padding:31px 33px}.intro-art{height:205px}.intro{min-height:190px}}
@media(max-width:1100px) and (min-width:721px){.brand-caption{font-size:12px}.brand-caption small{font-size:12px}.intro{min-height:148px}.intro-art{width:45%;height:155px}.intro h1{font-size:32px}.intro-copy{width:59%}.intro-note{font-size:12px}.era-tab{padding:15px 11px 12px;min-height:94px}.era-tab .era-no{display:none}.era-tab strong{font-size:15px}.era-glyph{font-size:35px;right:8px}.era-tabs{gap:7px}.atlas-shell{grid-template-columns:minmax(0,1fr) 340px;gap:15px}.story-panel{padding:25px 24px}.map-heading{padding:25px 25px 0}.map-heading h2{font-size:29px}.map-bottom{padding:17px 23px;gap:5px}.event-card{padding:21px}.card-top{font-size:12px}}
@media(max-width:720px){.site-header{height:79px;padding:0 5%}.brand-symbol{width:34px;height:34px;font-size:28px;border-radius:10px;box-shadow:2px 3px 0 #ffd16d}.brand-name{font-size:26px;letter-spacing:3px}.brand-caption{font-size:12px;margin-left:4px}.brand-caption small{display:none}.brand{gap:8px}.site-header nav{gap:0}.plain{font-size:13px}.intro{min-height:132px;margin:12px 0 18px}.intro-copy{width:100%;padding:0}.intro .eyebrow{font-size:12px;letter-spacing:.7px;margin-bottom:10px}.intro h1{font-size:28px;white-space:normal}.intro h1 span::after{height:7px}.intro-note{font-size:12px;display:block;max-width:74%;margin-top:12px;line-height:1.7}.intro-art{width:56%;height:115px;right:-7px;bottom:-2px;opacity:.38;mask-image:linear-gradient(to right,transparent,#000 28%)}.era-tabs{gap:7px;grid-template-columns:repeat(3,minmax(0,1fr));margin-bottom:15px}.era-tab{padding:13px 10px 11px;min-height:80px;border-radius:12px}.era-tab:nth-child(-n+3){border-bottom-width:1px}.era-tab:nth-child(3){border-right-width:1px}.era-tab strong{font-size:14px}.era-tab .era-no{display:none}.era-tab small{font-size:12px;margin-top:8px;letter-spacing:-.3px}.era-glyph{font-size:34px;right:6px;top:5px}.atlas-shell{grid-template-columns:1fr;gap:15px}.map-panel{min-height:345px;border-radius:18px}.map-heading{padding:21px 23px 0}.map-heading .eyebrow{font-size:12px;padding:4px 8px}.map-heading h2{font-size:27px;margin:7px 0 8px}.map-heading p:last-child{font-size:13px}.map-wrap{margin:-8px -2% 0}.map-wrap svg{min-height:190px}.map-place,.marker text,.marker-caption{display:none}.map-bottom{padding:11px 20px 17px;font-size:12px;gap:8px;align-items:start;flex-direction:row}.map-bottom>span:first-child{flex-shrink:0}.map-bottom>span:last-child{text-align:right;max-width:49%}.story-panel{padding:24px;border-radius:18px}.story-panel h2{font-size:25px}.story-date{font-size:23px;margin-top:12px}:is(.story-panel,.story-content)>.eyebrow{margin-bottom:5px}.story-context{font-size:14px;padding:12px 14px}.story-nav button{height:42px;width:42px}.timeline-panel{padding:19px 20px 16px;margin-top:15px}.timeline-heading{gap:12px;align-items:start}.timeline-heading>div{display:flex;flex-direction:column;gap:2px;min-width:0}.section-label{font-size:13px;margin-right:0}#timeline-date{font-size:15px}.play-button{white-space:nowrap;padding:8px 10px;font-size:13px}.range-labels{font-size:12px}.timeline-hint{font-size:12px;line-height:1.7}.events-heading h2{font-size:22px}.event-grid{gap:13px}.event-card{padding:21px}.event-card h3{font-size:21px}.event-card p{font-size:15px}.events-heading .eyebrow{font-size:12px}.card-top{font-size:13px}.footer-brand{font-size:12px}dialog{padding:26px}.region-filter{font-size:14px}}
@media(max-width:370px){.brand-caption{display:none}.intro h1{font-size:25px}.era-tab{padding-left:8px;padding-right:8px}.era-tab small{font-size:12px;letter-spacing:-.6px}.era-tab strong{font-size:13px}.map-heading h2{font-size:25px}.card-top{font-size:12px}.card-category{font-size:12px}}
@media(prefers-reduced-motion:reduce){.marker.selected .marker-ping{animation:none}.intro-art img{transform:none}*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

/* Detailed chronology and its links back to the world atlas. */
[hidden]{display:none!important}.site-header nav a{text-decoration:none;font-size:14px;white-space:nowrap}.nav-link{color:#65758e;padding:8px 2px}.nav-link:hover{color:#3157b8}.china-intro{display:flex;align-items:center;justify-content:space-between;gap:25px;padding:31px 0 22px}.china-intro .eyebrow{color:var(--teal);font-weight:600}.china-intro h1{font-size:36px;line-height:1.5;white-space:normal}.china-intro p:last-child{margin:14px 0 0;color:var(--muted);font-size:15px}.china-count{flex-shrink:0;padding:10px 15px;border:1px solid var(--track);border-radius:30px;background:var(--soft);color:var(--teal);font-size:13px}.chronology-notes{border:1px solid var(--track);border-radius:12px;background:#fff;padding:12px 17px;margin:0 0 23px}.chronology-notes summary{font-size:14px;color:var(--teal);cursor:pointer;font-weight:600}.chronology-notes p{font-size:14px;color:#647287;line-height:1.9;margin:11px 0 0}.china-layout{display:grid;grid-template-columns:273px minmax(0,1fr);gap:23px;align-items:start;margin-bottom:40px}.china-directory{border:1px solid #d7dfeb;border-radius:17px;background:#fff;position:sticky;top:18px;overflow:hidden}.directory-heading{padding:18px 18px 14px;border-bottom:1px solid #e1e6ef;display:flex;align-items:center;justify-content:space-between;gap:10px}.directory-heading strong{font-size:15px}.directory-heading>span{font-size:12px;color:#7c8898}#dynasty-directory{max-height:calc(100vh - 115px);overflow-y:auto;padding:8px;scrollbar-width:thin;scrollbar-color:#c7d2e3 transparent}.dynasty-item{width:100%;display:grid;grid-template-columns:23px minmax(0,1fr) auto;align-items:start;gap:8px;border:0;background:transparent;border-radius:10px;text-align:left;padding:12px 9px;color:var(--ink);margin:2px 0}.dynasty-item:hover{background:#f2f5fb}.dynasty-item[aria-pressed=true]{background:var(--soft);color:var(--teal)}.dynasty-number{font-size:12px;color:#8994a6;line-height:1.8}.dynasty-item strong{display:block;font-size:15px;line-height:1.5;font-weight:600}.dynasty-item small{display:block;font-size:12px;color:#718198;line-height:1.7;margin-top:4px;overflow-wrap:anywhere}.dynasty-kind{font-size:12px;color:#718198;white-space:nowrap;border:1px solid #e0e6ee;border-radius:5px;padding:1px 4px}.dynasty-item[aria-pressed=true] .dynasty-kind{color:var(--teal);border-color:var(--track)}.dynasty-loading,.china-loading{font-size:16px;color:var(--muted);padding:22px}.dynasty-select-label{display:none}.dynasty-detail{min-width:0;background:#fff;border:1px solid #d7dfeb;border-radius:22px;padding:30px 32px;overflow-wrap:anywhere}.dynasty-heading{display:flex;justify-content:space-between;align-items:start;gap:20px;padding-bottom:20px;border-bottom:1px solid #e5eaf1}.dynasty-heading .eyebrow{color:var(--teal);background:var(--soft);padding:5px 10px;display:inline-block;border-radius:6px;font-size:12px;letter-spacing:.8px;margin:0 0 13px}.dynasty-heading h2{font:600 40px/1.5 var(--serif);color:#263b57;margin:0 0 7px}.dynasty-date{font-size:16px;color:var(--teal);margin:0}.dynasty-step-nav{display:flex;gap:7px;flex-shrink:0;margin-top:7px}.dynasty-step-nav button{font-size:13px;border:1px solid var(--track);border-radius:8px;background:var(--soft);color:var(--teal);padding:7px 11px;min-height:35px}.dynasty-step-nav button:hover{background:var(--teal);color:white}.dynasty-step-nav button:disabled{opacity:.4;cursor:default}.dynasty-step-nav button:disabled:hover{background:var(--soft);color:var(--teal)}.dynasty-summary{font-size:17px;line-height:1.9;color:#294262;font-weight:600;margin:23px 0 12px}.dynasty-overview{font-size:16px;line-height:1.95;color:#4f6178;margin:0 0 22px}.dynasty-relations{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;background:var(--soft);border-radius:13px;padding:17px 20px;margin:23px 0 18px}.dynasty-relations span{font-size:12px;font-weight:600;color:var(--teal)}.dynasty-relations p{font-size:14px;line-height:1.8;margin:7px 0 0;color:#53667b}.dynasty-facts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;padding:6px 0 23px;border-bottom:1px solid #e5eaf1}.dynasty-facts span{display:block;font-size:12px;color:#7a869a;margin-bottom:6px}.dynasty-facts strong{font-size:14px;line-height:1.9;font-weight:500;color:#4b607a}.dynasty-explain{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:27px}.dynasty-explain>div{padding:18px 17px;background:#f5f7fb;border:1px solid #e6eaf1;border-radius:12px}.explain-number{font:600 13px var(--sans);color:var(--teal);background:var(--soft);border-radius:5px;display:inline-block;padding:4px 7px;margin-bottom:8px}.dynasty-explain h3{font-size:16px;line-height:1.65;color:#324b6c;margin:0 0 9px}.dynasty-explain p{font-size:14px;line-height:1.9;color:#63738a;margin:0}.dynasty-section{padding-top:30px;margin-top:28px;border-top:1px solid #e5eaf1}.dynasty-section-heading{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:19px}.dynasty-section h3,.dynasty-sources h3{font:600 20px/1.7 var(--serif);margin:0;color:#2b4161}.dynasty-section-heading>span{font-size:12px;color:#7b889d;flex-shrink:0}.parallel-chart{background:#f6f8fc;border:1px solid #e1e8f0;border-radius:12px;padding:19px 19px 15px;min-width:0}.parallel-row{display:grid;grid-template-columns:167px minmax(0,1fr);gap:15px;align-items:center;margin:0 0 15px}.parallel-label strong{display:block;font-size:14px;line-height:1.6;font-weight:600}.parallel-label span{display:block;font-size:12px;line-height:1.7;color:#8290a3}.parallel-main strong{color:var(--teal)}.parallel-track{height:25px;position:relative;background:repeating-linear-gradient(to right,#cfd8e477 0,#cfd8e477 1px,transparent 1px,transparent 25%);border-top:1px solid #dce3ed;border-bottom:1px solid #dce3ed}.parallel-track>span{position:absolute;top:4px;height:16px;border-radius:4px;background:var(--row-color);opacity:.8;min-width:2px}.parallel-main .parallel-track>span{opacity:1}.parallel-axis{margin-left:182px;display:flex;justify-content:space-between;font-size:12px;color:#8090a4;gap:12px}.parallel-explanations{padding-left:20px;margin:16px 0 9px;font-size:14px;line-height:1.9;color:#62728a}.parallel-explanations li{margin:7px 0}.parallel-explanations strong{color:#415d80}.dynasty-chart-note{font-size:12px;line-height:1.8;color:#8995a7;margin:10px 0 0}.dynasty-milestones{list-style:none;padding:0;margin:0}.dynasty-milestones li{display:grid;grid-template-columns:136px minmax(0,1fr);gap:23px;padding:17px 0;border-bottom:1px solid #edf0f6;position:relative}.dynasty-milestones li:last-child{border-bottom:0}.milestone-year{font-size:14px;color:var(--teal);font-weight:600;padding-top:1px;line-height:1.8}.dynasty-milestones li>div{padding-left:17px;border-left:2px solid var(--track);position:relative}.dynasty-milestones li>div::before{content:'';position:absolute;width:8px;height:8px;background:var(--teal);border:2px solid white;border-radius:50%;left:-5px;top:8px;box-sizing:border-box;box-shadow:0 0 0 1px var(--teal)}.dynasty-milestones h4{font-size:16px;color:#3c5374;line-height:1.7;margin:0 0 7px}.dynasty-milestones p{font-size:14px;line-height:1.9;color:#728097;margin:0}.comparison-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.comparison-card{text-align:left;border:1px solid #dce4ef;background:#fff;border-radius:11px;padding:17px;display:flex;flex-direction:column;min-width:0}.comparison-card:hover{background:var(--soft);border-color:var(--teal);transform:translateY(-2px)}.comparison-card>span{font-size:12px;line-height:1.7;color:var(--teal)}.comparison-card strong{font-size:16px;line-height:1.7;color:#3e5677;margin:7px 0}.comparison-card p{font-size:14px;line-height:1.85;color:#79869a;margin:0 0 10px}.comparison-card small{font-size:12px;color:var(--teal);margin-top:auto}.comparison-empty{font-size:14px;color:var(--muted)}.dynasty-sources{padding-top:23px;border-top:1px solid #e5eaf1;margin-top:30px}.dynasty-sources h3{font-size:17px}.dynasty-sources ul{padding-left:20px;font-size:13px;line-height:1.9;color:var(--teal);margin:12px 0 0}.dynasty-sources li{margin-top:8px}.dynasty-sources a{color:var(--teal);text-decoration:none;border-bottom:1px solid var(--track)}.dynasty-sources a:hover{text-decoration:underline}.dynasty-story-link{margin:15px 0 0;padding:10px 12px;text-align:left;border:1px solid var(--track);border-radius:9px;background:var(--soft);color:var(--teal);font-size:14px;line-height:1.7}.dynasty-story-link:hover{background:var(--teal);color:#fff}.map-event-picker{position:absolute;z-index:4;left:25px;bottom:57px;width:min(350px,calc(100% - 50px));border:1px solid #ccd7e5;border-radius:14px;background:#fff9ed;box-shadow:0 12px 35px #0b234c44;color:#253d5d;overflow:hidden}.map-picker-heading{display:flex;justify-content:space-between;align-items:center;padding:13px 16px;border-bottom:1px solid #dde1e7;gap:12px}.map-picker-heading strong{font-size:14px}.map-picker-heading button{font-size:22px;color:#657891;border:1px solid #d0dae6;border-radius:50%;width:29px;height:29px;background:transparent;line-height:1}.map-event-picker ul{padding:6px;list-style:none;margin:0;max-height:240px;overflow-y:auto}.map-event-picker li button{display:block;background:transparent;border:0;border-radius:7px;text-align:left;width:100%;padding:11px;color:#314d72}.map-event-picker li button:hover{background:#e8edf9}.map-event-picker li span{font-size:12px;color:#7b8ca3;display:block}.map-event-picker li strong{font-size:14px;line-height:1.8;display:block;font-weight:500}.marker .marker-count{font-size:12px;font-weight:700;fill:var(--dark);stroke:none;pointer-events:none}
@media(max-width:1100px) and (min-width:721px){.china-layout{grid-template-columns:237px minmax(0,1fr);gap:17px}.dynasty-detail{padding:27px 24px}.dynasty-explain{grid-template-columns:1fr}.dynasty-explain>div{padding:17px 19px}.dynasty-explain .explain-number{float:left;margin:0 11px 0 0}.dynasty-explain p{clear:both;padding-top:7px}.dynasty-explain h3{margin:0}.dynasty-section-heading{flex-wrap:wrap}.parallel-row{grid-template-columns:133px minmax(0,1fr);gap:13px}.parallel-axis{margin-left:146px}.dynasty-milestones li{grid-template-columns:110px minmax(0,1fr);gap:16px}.china-count{font-size:12px;padding:8px 11px}}
@media(max-width:720px){.site-header{flex-wrap:wrap;height:auto;min-height:104px;gap:13px 15px;padding-top:15px;padding-bottom:15px}.site-header nav{width:100%;gap:20px;justify-content:start}.site-header nav .nav-active{display:inline-block;padding:6px 13px}.site-header nav a{font-size:14px}.site-header nav .plain{margin-left:auto;font-size:13px}.china-intro{padding:22px 0 17px;display:block}.china-intro h1{font-size:28px}.china-intro p:last-child{font-size:14px;line-height:1.9;margin-top:12px}.china-count{display:inline-block;margin-top:15px;padding:7px 11px;font-size:12px}.chronology-notes{margin-bottom:16px;padding:11px 14px}.chronology-notes p{font-size:14px}.dynasty-select-label{display:flex;align-items:start;flex-direction:column;gap:8px;font-size:14px;color:var(--teal);margin:0 0 16px}.dynasty-select-label select{width:100%;font:14px var(--sans);line-height:1.7;color:#365274;border:1px solid #cad7e8;border-radius:10px;background:#fff;padding:12px 34px 12px 12px}.china-layout{display:block;margin-bottom:27px}.china-directory{display:none}.dynasty-detail{padding:23px 21px;border-radius:17px}.dynasty-heading{gap:10px;flex-direction:column;padding-bottom:16px}.dynasty-heading h2{font-size:33px}.dynasty-heading .eyebrow{margin-bottom:10px}.dynasty-date{font-size:15px;line-height:1.8}.dynasty-step-nav{margin-top:2px;gap:9px}.dynasty-step-nav button{font-size:14px;padding:8px 12px;min-height:40px}.dynasty-summary{font-size:16px;line-height:1.9;margin:20px 0 12px}.dynasty-overview{font-size:16px;line-height:1.95}.dynasty-relations{grid-template-columns:1fr;gap:12px;padding:15px 17px}.dynasty-relations p{font-size:14px}.dynasty-facts{grid-template-columns:1fr;gap:14px;padding-bottom:20px}.dynasty-explain{grid-template-columns:1fr;gap:11px;margin-top:21px}.dynasty-explain p{font-size:15px}.dynasty-section{margin-top:23px;padding-top:23px}.dynasty-section-heading{flex-direction:column;align-items:start;gap:7px;margin-bottom:16px}.dynasty-section h3{font-size:20px}.parallel-chart{padding:15px 12px}.parallel-row{grid-template-columns:112px minmax(0,1fr);gap:11px}.parallel-label strong{font-size:13px}.parallel-label span{font-size:12px}.parallel-axis{margin-left:123px;font-size:12px}.parallel-explanations{font-size:14px;padding-left:19px}.dynasty-chart-note{font-size:12px}.dynasty-milestones li{grid-template-columns:1fr;gap:8px;padding:17px 0}.milestone-year{font-size:14px}.dynasty-milestones li>div{margin-left:4px;padding-left:15px}.dynasty-milestones p{font-size:15px}.comparison-grid{grid-template-columns:1fr}.comparison-card p{font-size:15px}.dynasty-sources ul{font-size:13px}.map-event-picker{left:18px;bottom:60px;width:calc(100% - 36px)}.marker .marker-count{display:block;font-size:15px}.map-picker-heading button{width:34px;height:34px}.map-event-picker li button{padding:12px}.map-event-picker li strong{font-size:15px}}

.dynasty-detail{scroll-margin-top:20px}

.parallel-intro{font-size:14px;line-height:1.9;color:#62728a;margin:0 0 17px}

/* Historical ranges */
.territory-controls{padding:17px 22px 15px;background:#f0f4ff;border:1px solid var(--line);border-bottom:0}.territory-control-row{display:flex;align-items:center;gap:15px 22px;flex-wrap:wrap}.territory-control-title{margin-right:auto;display:flex;gap:10px;align-items:baseline}.territory-control-title strong{font-size:16px;color:var(--teal)}.territory-control-title>span{font-size:12px;color:#7989a3}.territory-check{display:flex;align-items:center;gap:7px;white-space:nowrap;font-size:14px;color:#485f81;cursor:pointer}.territory-check input{width:16px;height:16px;accent-color:var(--teal);margin:0}.territory-year-label{font-size:14px;display:flex;gap:10px;align-items:center;color:#485f81}.territory-year-label select{max-width:330px;border:1px solid #c6d3e6;border-radius:7px;font-size:14px;background:#fff;color:#355176;padding:7px 30px 7px 10px;min-height:35px}.territory-status{font-size:13px;line-height:1.85;color:#7686a0;margin:11px 0 0}.territory-summary{padding:17px 24px 19px;border:1px solid var(--line);border-top:0;background:#f7f9ff;scroll-margin-top:18px}.territory-legend{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:15px}.territory-legend button{font-size:14px;border:1px solid #d3dced;border-radius:8px;background:#fff;padding:8px 11px;min-height:37px;color:#455f82;display:flex;align-items:center;gap:8px;text-align:left;line-height:1.7}.territory-legend button:hover,.territory-legend button[aria-pressed=true]{border-color:var(--teal);background:var(--soft);color:var(--teal)}.territory-legend i,.territory-detail-heading i{display:inline-block;width:12px;height:12px;background:var(--range-color);border:1px solid #1d355533;border-radius:3px;flex-shrink:0}.territory-detail-heading{display:flex;justify-content:space-between;align-items:center;gap:13px;flex-wrap:wrap}.territory-detail-heading h3{font:600 18px/1.75 var(--serif);color:#334e73;margin:0;display:flex;align-items:center;gap:10px}.territory-detail-heading>span{font-size:13px;color:#8090a7}.territory-detail>p{font-size:16px;color:#5c7090;line-height:1.9;margin:10px 0}.territory-detail>p.territory-extent{font-size:14px;background:#edf1fa;border-radius:9px;padding:11px 15px;color:#637896}.territory-extent strong{display:block;color:#41638b;font-weight:600;margin-bottom:5px}.territory-detail>p.territory-select-hint{font-size:14px;color:#8695ac;margin:9px 0 0}.territory-sources{display:flex;gap:8px 14px;flex-wrap:wrap;align-items:baseline;font-size:13px;line-height:1.8;padding-top:2px}.territory-sources>span{color:#91a0b5}.territory-sources a{color:var(--teal);text-decoration:none;border-bottom:1px solid var(--track)}.territory-sources a:hover{text-decoration:underline}.territory-method{font-size:12px;line-height:1.9;color:#91a0b5;margin:13px 0 0}.territory-shape{stroke-width:1.2;stroke-dasharray:3 2;vector-effect:non-scaling-stroke;cursor:pointer;transition:fill-opacity .18s,stroke-opacity .18s;outline:none}.territory-shape:hover{fill-opacity:.75}.territory-shape:focus-visible{stroke:#fff;stroke-width:3;stroke-dasharray:none;fill-opacity:.7}.territory-name{font:600 16px var(--sans);fill:#fff9df;paint-order:stroke;stroke:#203452;stroke-width:5;stroke-linejoin:round;pointer-events:none}.territory-map-labels{pointer-events:none}.territory-shape.territory-selected{stroke:#fff5d6;stroke-dasharray:none;stroke-width:1.7}
@media(max-width:1100px){.territory-control-title{width:100%;margin-right:0}.territory-year-label{margin-left:auto}}
@media(max-width:720px){.territory-controls{padding:14px 16px}.territory-control-row{gap:12px 18px}.territory-control-title{gap:8px}.territory-control-title strong{font-size:16px}.territory-year-label{width:100%;margin-left:0;display:block}.territory-year-label select{display:block;width:100%;max-width:none;margin-top:7px;font-size:14px;min-height:41px}.territory-check{min-height:28px}.territory-status{font-size:13px;margin-top:10px}.territory-summary{padding:16px}.territory-legend{gap:7px;margin-bottom:15px}.territory-legend button{font-size:14px;padding:8px 10px;min-height:42px}.territory-detail-heading{display:block}.territory-detail-heading h3{font-size:18px}.territory-detail-heading>span{display:block;margin-top:5px}.territory-detail>p{font-size:16px}.territory-detail>p.territory-extent{font-size:14px;line-height:1.9}.territory-sources{display:block}.territory-sources>span,.territory-sources>a{display:block;width:fit-content;margin-top:7px}.territory-name{font-size:19px}.territory-method{font-size:12px}.territory-shape{stroke-width:1}}
@media(prefers-reduced-motion:reduce){.territory-shape{transition:none}}

/* Stable map palette keeps range colors distinct in every era. */
.map-panel{--dark:#101b2a;--sea-light:#1e3044;--land-light:#364457;--land-dark:#2b394a;--land-edge:#5c6c82;--map-text:#d0d9e5;--accent:#ffdd83;transition:none}
.map-panel .ocean-top,.map-panel .ocean-bottom,.map-panel .land-top,.map-panel .land-bottom,.map-panel .land{transition:none}
.map-place{fill:var(--map-text);opacity:1;paint-order:stroke;stroke:var(--dark);stroke-width:3;stroke-linejoin:round}
.territory-shape:hover{fill-opacity:.97}.territory-shape:focus-visible,.territory-shape.territory-selected:hover{fill-opacity:1}
.map-picker-range{border-bottom:1px solid #dde1e7;margin-bottom:4px;padding-bottom:4px}
.map-event-picker .map-picker-range strong{color:#345e88}

/* Keep the atlas steady while the selected story changes. */
.atlas-shell{height:620px;grid-template-rows:minmax(0,1fr)}
.map-panel,.story-panel{height:100%;min-height:0}
.map-panel{display:grid;grid-template-rows:164px minmax(0,1fr) 70px}
.map-wrap{min-height:0;flex:1 1 0;margin:0}
.map-wrap svg{display:block;height:100%;min-height:0;max-height:100%}
.story-content{flex:1 1 0;min-height:0;overflow-y:auto;scrollbar-gutter:stable;display:flex;flex-direction:column;padding-right:8px}
.story-content>*{flex-shrink:0}
.story-panel>.story-foot{flex-shrink:0;margin-top:15px}
@media(min-width:721px) and (max-width:1100px){.map-panel{grid-template-rows:184px minmax(0,1fr) 80px}}
@media(max-width:720px){
 .atlas-shell{height:auto;grid-template-rows:auto auto}
 .map-panel{height:380px;min-height:0;grid-template-rows:140px minmax(0,1fr) 76px}
 .map-bottom>span:first-child{flex-shrink:1;max-width:49%}
 .story-panel{height:auto;min-height:0}
 .story-content{flex:none;overflow:visible;scrollbar-gutter:auto;padding-right:0}
}

/* A steady timeline stays above the changing atlas content. */
html{scrollbar-gutter:stable}
.timeline-panel{position:sticky;top:12px;z-index:10;height:140px;margin:0 0 18px;padding:15px 24px;display:grid;grid-template-rows:40px 50px 18px;box-shadow:0 8px 24px #152d5d14}
.timeline-heading{height:40px;min-width:0;gap:16px;align-items:center}
.timeline-heading>div{display:flex;flex-direction:row;align-items:center;gap:14px;min-width:0;flex:1}
.timeline-heading .section-label{flex:none;white-space:nowrap;margin-right:0}
#timeline-date{height:24px;line-height:24px;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-variant-numeric:tabular-nums}
#play-button{width:122px;flex:0 0 122px;height:40px;white-space:nowrap}
.timeline-panel .range-wrap{height:50px;margin:0;padding-top:12px;min-width:0}
.timeline-panel .range-labels{height:23px;margin-top:10px;white-space:nowrap}
.timeline-panel .timeline-tick{top:6px;bottom:auto;height:8px;pointer-events:none}
.timeline-panel .timeline-hint{height:18px;line-height:18px;margin:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.territory-status{height:48px;line-height:24px;overflow-y:auto;overflow-anchor:none}
.story-panel,.territory-summary{scroll-margin-top:166px}
@media(max-width:720px){
 .timeline-panel{height:146px;top:8px;padding:15px 14px;margin-bottom:15px;grid-template-rows:46px 50px 18px;border-radius:14px}
 .timeline-heading{height:46px;gap:12px}
 .timeline-heading>div{align-items:flex-start;flex-direction:column;gap:0}
 #timeline-date{width:100%;height:22px;line-height:22px}
 #play-button{width:110px;flex-basis:110px}
 .territory-status{height:72px}
}

.china-intro-actions{display:flex;flex-direction:column;align-items:flex-end;gap:10px;flex-shrink:0}.china-modern-jump{display:inline-block;text-decoration:none;border:1px solid var(--track);background:var(--soft);color:var(--teal);border-radius:10px;padding:10px 15px;font-size:14px;font-weight:600}.china-modern-jump:hover{background:var(--teal);color:#fff}.milestone-event-link{margin-top:10px;border:1px solid var(--track);border-radius:7px;padding:7px 10px;background:var(--soft);color:var(--teal);font-size:14px;cursor:pointer}.milestone-event-link:disabled{opacity:.5;cursor:default}.milestone-event-link:not(:disabled):hover{background:var(--teal);color:white}@media(max-width:720px){.china-intro-actions{align-items:flex-start;flex-shrink:1}}