/* Hallmark · macrostructure: Map / Diagram · tone: editorial field-notebook · anchor hue: warm red · contrast: pass · nav: inherited · footer: inherited · slop: pass (42–45)
 * Source map plus regional reading cues; no new historical routes. */
.p4-map-surface,.chishui-dialog{--cm-paper:#fff;--cm-map:#ffffed;--cm-ink:#24292c;--cm-muted:#53616a;--cm-red:#a02b2d;--cm-rule:#dce1e4;--cm-panel:#f4f6f6;--cm-selected:#f9eded;--cm-halo:#a02b2d38;--cm-halo-centre:#a02b2d70;--cm-shadow:#24292c18;--cm-clear:transparent;--cm-ease:cubic-bezier(.16,1,.3,1);--cm-ease-toggle:cubic-bezier(.65,0,.35,1);--cm-font:var(--font-body)}
.tactics-reading .crossing-map-open.p4-map-surface,.p4-map-surface{position:relative;min-height:0;width:100%;height:100%;overflow:clip;touch-action:none;overscroll-behavior:none;background:var(--cm-map);isolation:isolate;user-select:none;cursor:grab}
.p4-map-surface:active{cursor:grabbing}
.tactics-reading .p4-map-surface>img,.chishui-surface>img{position:absolute;left:0;top:0;inset:auto;object-fit:fill;max-width:none;min-width:0;transform-origin:0 0;will-change:transform;pointer-events:none;user-select:none}
.p4-map-overlay,.p4-area-layer{position:absolute;inset:0;pointer-events:none}
.p4-map-overlay[hidden],.chishui-endpoints[hidden]{display:none}
.p4-map-overlay.is-restoring{opacity:0;transition:opacity 240ms var(--cm-ease)}
.p4-map-surface .p4-map-pin{position:absolute;width:44px;height:44px;min-height:44px;padding:0;transform:translate(-50%,-50%);background:var(--cm-clear);border:0;border-radius:50%;pointer-events:auto;overflow:visible;z-index:3;color:var(--cm-red);font-family:var(--cm-font);touch-action:none}
.p4-map-pin:active{transform:translate(-50%,-50%)!important;background:var(--cm-clear)!important}
.p4-map-pin .p4-pin-core{display:block;position:absolute;left:50%;top:50%;width:16px;height:16px;transform:translate(-50%,-50%);border:3px solid var(--cm-red);border-radius:50%;background:var(--cm-paper);box-shadow:0 0 0 3px var(--cm-paper)}
.p4-map-pin.is-end .p4-pin-core{background:var(--cm-red)}
.p4-map-pin .p4-pin-label,.crossing-map-open .p4-map-pin .p4-pin-label{display:none}
.tactics-reading .tactics-map figcaption.p4-map-legend{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr) auto;align-items:center;gap:6px;min-width:0;color:var(--p4-ink)}
.p4-map-legend>span{display:flex;align-items:baseline;gap:3px;min-width:0;white-space:nowrap}
.p4-map-legend small{font:500 9px/1.5 var(--font-body);color:var(--p4-red)}
.p4-map-legend strong{font:500 11px/1.5 var(--font-body)}
.p4-map-legend em{font:400 9px/1.5 var(--font-body);color:var(--p4-muted);white-space:nowrap}
.p4-map-pin .p4-pin-core:before,.p4-map-pin .p4-pin-core:after{content:'';position:absolute;inset:-3px;border:1px solid var(--cm-red);border-radius:50%;background:var(--cm-halo);animation:p4-map-pulse 2.8s var(--cm-ease) infinite;pointer-events:none}
.p4-map-pin .p4-pin-core:after{animation-delay:-1.4s}
@keyframes p4-map-pulse{from{transform:scale(.8);opacity:.6}to{transform:scale(2.2);opacity:0}}
body:not([data-page='4']) .crossing-map-open .p4-pin-core:before,body:not([data-page='4']) .crossing-map-open .p4-pin-core:after,.chishui-dialog:not([open]) .p4-pin-core:before,.chishui-dialog:not([open]) .p4-pin-core:after{animation-play-state:paused}
.p4-map-area{position:absolute;transform:translate(-50%,-50%);border:0;border-radius:50%;background:radial-gradient(ellipse,var(--cm-halo-centre) 0%,var(--cm-halo) 32%,var(--cm-clear) 74%);pointer-events:none}
.p4-map-area.is-pulsing{animation:p4-area-pulse 750ms ease-out 2}
@keyframes p4-area-pulse{from{opacity:1}50%{opacity:.3}to{opacity:1}}
.p4-map-number{position:absolute;transform:translate(-50%,-50%);display:grid;place-items:center;width:23px;height:23px;border:1px solid var(--cm-red);border-radius:50%;background:var(--cm-paper);color:var(--cm-red);font:600 13px/1 var(--cm-font);z-index:2;pointer-events:none}
.p4-map-number[hidden]{display:none}
.p4-map-surface .p4-expand{position:absolute;right:3px;bottom:3px;z-index:5;display:grid;place-items:center;width:44px;min-height:44px;padding:0;background:var(--cm-clear);border:0;transform:none;color:var(--cm-red);touch-action:manipulation}
.p4-expand svg{width:26px;height:26px;background:var(--cm-paper);border:1px solid var(--cm-rule);border-radius:3px;fill:none;stroke:currentColor;stroke-width:1.4;padding:4px}
.p4-map-popup{position:absolute;z-index:8;left:10px;right:10px;bottom:10px;display:flex;gap:10px;padding:12px;background:var(--cm-paper);border:1px solid var(--cm-rule);border-radius:4px;box-shadow:0 3px 12px var(--cm-shadow);font:400 14px/1.6 var(--cm-font);max-height:45%;overflow:auto}
.p4-map-popup[hidden]{display:none}
.p4-map-popup{touch-action:pan-y;overscroll-behavior:contain}
.p4-map-popup p{margin:0;min-width:0;flex:1}
.p4-map-popup button{flex:none;align-self:start;width:44px;min-height:44px;font-size:22px;color:var(--cm-muted)}
.chishui-dialog[open]{position:fixed;inset:0;margin:0;padding:0;width:100vw;max-width:none;height:100vh;height:100dvh;max-height:none;overflow:clip;border:0;border-radius:0;display:grid;grid-template-rows:auto minmax(0,1fr) auto;background:var(--cm-paper);color:var(--cm-ink);font-family:var(--cm-font)}
.chishui-dialog::backdrop{background:var(--cm-shadow)}
.chishui-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:calc(9px + env(safe-area-inset-top)) 18px 9px;border-bottom:1px solid var(--cm-rule);min-width:0}
.chishui-head p{font:400 11px/1.5 var(--cm-font);color:var(--cm-muted);margin:0 0 2px}
.chishui-head h2{font:600 19px/1.4 var(--cm-font);letter-spacing:0;color:var(--cm-ink);margin:0}
.chishui-head .chishui-close{width:44px;min-width:44px;min-height:44px;padding:0;border:1px solid var(--cm-rule);border-radius:50%;font:400 22px/1 var(--cm-font);background:var(--cm-paper);color:var(--cm-ink)}
.chishui-surface{outline-offset:-4px;background:var(--cm-map)}
.chishui-footer{position:relative;padding:0 16px calc(4px + env(safe-area-inset-bottom));border-top:1px solid var(--cm-rule);background:var(--cm-paper);min-width:0}
.chishui-endpoints{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;border-bottom:1px solid var(--cm-rule)}
.chishui-endpoints button{display:flex;align-items:baseline;justify-content:center;gap:6px;min-width:0;min-height:44px;padding:10px 0;border:0;border-radius:0;background:var(--cm-clear);color:var(--cm-ink);white-space:nowrap}
.chishui-endpoints small{font:500 10px/1.5 var(--cm-font);color:var(--cm-red)}
.chishui-endpoints strong{font:600 13px/1.5 var(--cm-font)}
.chishui-tabs{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-bottom:1px solid var(--cm-rule)}
.chishui-tabs button{display:flex;align-items:center;justify-content:center;gap:5px;min-height:48px;padding:0;font:500 14px/1.5 var(--cm-font);color:var(--cm-muted);background:var(--cm-clear);border:0;border-bottom:2px solid var(--cm-clear);border-radius:0}
.chishui-tabs small{font:400 10px/1.5 var(--cm-font);color:inherit}
.chishui-tabs button[aria-pressed='true']{color:var(--cm-red);border-bottom-color:var(--cm-red)}
.chishui-summary{max-width:640px;margin:0 auto;padding:8px 0 6px}
.chishui-summary>div{display:flex;align-items:baseline;justify-content:space-between;gap:10px;font-size:14px;line-height:1.5}
.chishui-summary strong{font-weight:600;color:var(--cm-red)}
.chishui-summary time{font-size:12px;color:var(--cm-muted)}
.chishui-summary p{font-size:14px;line-height:1.55;margin:3px 0 0;text-wrap:pretty}
.chishui-summary #chishui-path{font-size:12px;color:var(--cm-muted)}
.chishui-summary #chishui-followup{font-size:12px;color:var(--cm-ink)}
.chishui-tools{display:flex;justify-content:space-between;align-items:center;gap:8px;max-width:640px;margin:auto}
.chishui-tools>div{display:flex;align-items:center;gap:2px}
.chishui-tools button{min-width:44px;min-height:44px;padding:0 8px;border:0;border-radius:5px;background:var(--cm-clear);font:500 14px/1.4 var(--cm-font);color:var(--cm-ink);transform:none}
.chishui-tools button[data-chishui-tool='in'],.chishui-tools button[data-chishui-tool='out']{font-size:21px}
.chishui-tools button:disabled{opacity:.35;cursor:default}
.chishui-tools output{font-size:11px;color:var(--cm-muted);min-width:30px;text-align:center;font-variant-numeric:tabular-nums}
.chishui-credit summary{display:flex;align-items:center;min-height:44px;cursor:pointer;list-style:none;font:400 12px/1.4 var(--cm-font);color:var(--cm-muted);white-space:nowrap}
.chishui-credit summary::-webkit-details-marker{display:none}
.chishui-credit summary:after{content:'＋';margin-left:4px;color:var(--cm-red)}
.chishui-credit[open] summary:after{content:'−'}
.chishui-note{position:absolute;bottom:calc(100% + 8px);left:12px;right:12px;max-height:min(45dvh,340px);overflow:auto;overscroll-behavior:contain;padding:12px 14px;border:1px solid var(--cm-rule);border-radius:5px;background:var(--cm-paper);box-shadow:0 3px 12px var(--cm-shadow);font:400 13px/1.7 var(--cm-font);z-index:10}
.chishui-note p{margin:0 0 8px}
.chishui-note a{display:inline-flex;align-items:center;min-height:44px;color:var(--cm-red);margin-right:15px;text-underline-offset:3px}
.chishui-hint{font-size:10px;line-height:1.5;color:var(--cm-muted);margin:0 0 3px;text-align:center}
.chishui-dialog button:active{background:var(--cm-selected);transform:none}
.chishui-dialog button:focus-visible,.chishui-dialog summary:focus-visible,.chishui-surface:focus-visible{outline:2px solid var(--cm-red);outline-offset:2px}
@media(max-width:350px){.chishui-footer{padding-inline:10px}.chishui-head{padding-inline:12px}.chishui-tools{gap:3px}.chishui-tools button{padding-inline:4px}.chishui-tabs{gap:0}.chishui-tabs button{gap:3px}}
@media(max-height:550px){.chishui-head{padding-top:calc(4px + env(safe-area-inset-top));padding-bottom:4px}.chishui-head h2{font-size:17px}.chishui-head p{font-size:10px}.chishui-tabs button{min-height:44px}.chishui-summary{padding-block:4px}.chishui-hint{display:none}.chishui-summary p{line-height:1.4}}
@media(prefers-reduced-motion:reduce){.p4-map-pin .p4-pin-core:before,.p4-map-pin .p4-pin-core:after{animation:none!important;display:none}.p4-map-area.is-pulsing{animation:none!important}.chishui-dialog button{transition:none}}

/* detail polish: the source map stays dominant; controls read as a field note */
.p4-map-overlay.is-restoring{transition:opacity 240ms var(--cm-ease)}
.tactics-reading .p4-map-surface{outline:1px solid var(--cm-rule);outline-offset:-1px}
.chishui-head{position:relative;background:var(--cm-panel);padding-inline-start:20px}
.chishui-head::before{content:'';position:absolute;inset-block:9px;inset-inline-start:11px;width:2px;background:var(--cm-red)}
.chishui-head h2{letter-spacing:.01em;text-wrap:balance}
.chishui-head p,.chishui-summary time,.chishui-tools output{font-variant-numeric:tabular-nums}
.chishui-surface{outline:1px solid var(--cm-rule);outline-offset:-1px}
.chishui-endpoints{padding-block:3px;background:var(--cm-panel)}
.chishui-endpoints button{transition:color 180ms var(--cm-ease-toggle),background-color 180ms var(--cm-ease-toggle),transform 120ms var(--cm-ease)}
.chishui-endpoints button:active{transform:scale(.97)}
.chishui-endpoints small{letter-spacing:.04em}
.chishui-tabs{padding-top:3px}
.chishui-tabs button{position:relative;transition:color 180ms var(--cm-ease-toggle),background-color 180ms var(--cm-ease-toggle),border-color 180ms var(--cm-ease-toggle),transform 120ms var(--cm-ease)}
.chishui-tabs button::before{content:'';position:absolute;top:4px;left:50%;width:5px;height:5px;border-radius:50%;background:var(--cm-rule);transform:translateX(-50%);transition:background-color 180ms var(--cm-ease-toggle),transform 180ms var(--cm-ease-toggle)}
.chishui-tabs button[aria-pressed='true']{background:var(--cm-selected)}
.chishui-tabs button[aria-pressed='true']::before{background:var(--cm-red);transform:translateX(-50%) scale(1.25)}
.chishui-tabs button:active,.chishui-tools button:active{transform:scale(.97)}
.chishui-summary{border-inline-start:3px solid var(--cm-red);padding-inline:12px 0}
.chishui-summary>div strong{letter-spacing:.01em}
.chishui-tools{padding-top:3px;border-top:1px solid var(--cm-rule)}
.chishui-tools button{transition:color 180ms var(--cm-ease-toggle),background-color 180ms var(--cm-ease-toggle),transform 120ms var(--cm-ease)}
.chishui-credit summary{transition:color 180ms var(--cm-ease-toggle)}
.chishui-hint{padding-top:3px;border-top:1px solid var(--cm-rule);text-wrap:pretty}
@media(prefers-reduced-motion:reduce){.chishui-endpoints button,.chishui-tabs button,.chishui-tabs button::before,.chishui-tools button,.chishui-credit summary{transition:none}.chishui-endpoints button:active,.chishui-tabs button:active,.chishui-tools button:active{transform:none}}