/* Field Notes — no external fonts, images, or framework. */
:root{color-scheme:light;--paper:#f5f5ef;--surface:#ebede7;--ink:#20251e;--muted:#656b61;--line:#cdd1c6;--accent:#e1ec23;--ghost:#e3e6dc;--background-color:var(--surface);--color-secondary-text:var(--muted);--mono:ui-monospace,SFMono-Regular,Consolas,"Liberation Mono",monospace;--sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif}
@media(prefers-color-scheme:dark){:root:not([data-theme="light"]){color-scheme:dark;--paper:#171b18;--surface:#202620;--ink:#e8ebe1;--muted:#a0aa9c;--line:#3c453b;--ghost:#293127}}
:root[data-theme="dark"]{color-scheme:dark;--paper:#171b18;--surface:#202620;--ink:#e8ebe1;--muted:#a0aa9c;--line:#3c453b;--ghost:#293127}
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var(--mono);color:var(--muted);letter-spacing:.8px}.visual-top{border-top:1px solid var(--line);padding-top:11px}.visual-bottom{border-bottom:1px solid var(--line);padding-bottom:11px}.visual-bottom>span:first-child{font-family:var(--sans);font-size:10px;letter-spacing:2px}.status-dot{display:block;width:6px;height:6px;border-radius:50%;background:var(--ink)}.terrain-art{width:100%;height:auto;max-height:385px;overflow:visible}.hero-index{position:absolute;right:4.5%;bottom:-23px;font:900 83px/.78 Arial,sans-serif;letter-spacing:-5px;color:var(--ghost);z-index:0;display:flex;gap:18px;align-items:flex-end;user-select:none;pointer-events:none}.hero-index>span:first-child{font-size:38px;line-height:.8;letter-spacing:-1px}.status-strip{display:flex;align-items:center;justify-content:space-between;padding:15px 4.5%;background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid 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@media(min-width:1700px){.site-wrap{max-width:1700px;margin-left:auto;margin-right:auto;border-left:1px solid var(--line);border-right:1px solid var(--line)}.hero h1{font-size:76px}.hero{padding-top:75px;padding-bottom:65px}.terrain-art{max-height:440px}}
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@media(max-width:1000px){.rail{width:52px}.rail-mark{width:29px;margin-top:30px}.site-wrap,#site-registration{margin-left:52px}.site-header{height:94px}.main-nav .nav{gap:15px}.main-nav .nav a{font-size:11px}.header-tools{gap:8px}.theme-switch button{width:24px}.wordmark strong{font-size:21px}.hero h1{font-size:4.5vw;letter-spacing:-1px}.hero{min-height:470px;padding-top:42px;padding-bottom:45px}.hero-coordinate{font-size:8px;letter-spacing:.5px}.eyebrow{font-size:8px;gap:10px}.yellow-label{font-size:10px}.hero-description{font-size:12px}.visual-top,.visual-bottom{font-size:7px}.lead-post .card-body h3{font-size:24px}.card-body h3{font-size:19px}.post-card{padding:22px}.reading-layout{grid-template-columns:minmax(0,1fr) 170px;gap:5%}.reading-aside{padding-left:18px}.section-title p{font-size:11px}}
@media(max-width:800px){.main-nav{display:none}.header-tools{margin-left:auto}.menu-button{display:grid}.hero{grid-template-columns:1fr 1fr;gap:0;min-height:425px}.hero h1{font-size:4.7vw}.hero-visual{margin-left:9%;width:100%}.visual-top>span:first-child{max-width:160px;line-height:1.8}.hero-coordinate{font-size:7px}.status-strip{font-size:10px}.status-strip>span:nth-child(2){display:none}.journal{padding-top:42px}.journal-nav{gap:20px}.journal-nav .nav{gap:13px}.section-title p{max-width:190px;text-align:right;line-height:1.8}.lead-post{grid-template-columns:1fr 30%;gap:20px}.card-top{gap:8px}.card-top .micro{font-size:8px}.card-top time{font-size:9px}.card-schematic{padding-left:17px}.schematic-label{font-size:6px;line-height:1.6}.card-schematic>span{font-size:6px}.card-body h3{font-size:18px}.lead-post .card-body h3{font-size:22px}.post-card{padding:20px}.card-foot{font-size:9px}.card-foot a{font-size:10px}.reading-layout{display:block}.reading-aside{display:none}.article-header h1{font-size:35px}.gh-content{font-size:16px}.article-header{padding-bottom:30px}.article-meta{font-size:10px;gap:17px}.footer-meta{font-size:8px}.hero-index{font-size:65px;bottom:-18px}}
@media(max-width:600px){.rail{display:none}.site-wrap,#site-registration{margin-left:0}.site-header{height:86px;padding:0 22px;gap:10px}.wordmark strong{font-size:24px}.wordmark>span{font-size:7px;letter-spacing:.8px}.header-tools{gap:7px}.theme-switch{padding:2px}.theme-switch button{width:24px;height:26px}.search-button{width:27px}.icon-button.menu-button{width:25px}.hero{display:flex;flex-direction:column;padding:35px 24px 27px;gap:28px}.hero h1{font-size:clamp(35px,8.5vw,49px);letter-spacing:-1.4px;margin-bottom:18px}.hero .eyebrow{margin-bottom:23px;font-size:8px;gap:14px}.hero-description{font-size:13px;line-height:1.9;margin-bottom:23px}.primary-link{padding:12px 18px;min-width:145px;font-size:12px}.hero-coordinate{display:none}.hero-visual{width:100%;margin:0;max-width:440px;align-self:center}.terrain-art{max-height:270px}.visual-top,.visual-bottom{font-size:8px}.visual-top>span:first-child{max-width:none}.visual-bottom>span:first-child{font-size:9px}.hero-index{display:none}.status-strip{padding:13px 23px;font-size:9px;letter-spacing:.3px}.status-strip a span{margin-left:9px}.section-shell{padding-left:23px;padding-right:23px}.journal{padding-top:35px;padding-bottom:35px}.section-title{margin-bottom:22px;align-items:center}.section-title .micro{font-size:8px;margin-bottom:6px}.section-title h2{font-size:25px}.section-title p{font-size:10px;max-width:135px}.journal-nav{align-items:flex-start;gap:16px;padding:13px 0;margin-bottom:18px}.current-filter{font-size:11px;padding-top:2px}.current-filter span{margin-left:6px}.journal-nav .nav{gap:7px 14px;line-height:1.5}.journal-nav .nav a{font-size:10px;padding:3px 0}.post-grid{grid-template-columns:1fr;gap:15px}.lead-post{display:flex;min-height:auto;padding:23px}.card-schematic{display:none}.lead-post .card-body h3{font-size:23px;line-height:1.55}.card-body h3{font-size:20px;line-height:1.55}.post-card{padding:22px}.card-top{margin-bottom:17px}.card-top .micro{font-size:9px}.card-top time{font-size:10px}.card-body p{font-size:12px;margin-bottom:21px}.card-foot{font-size:10px}.card-foot a{font-size:11px}.tag-label{font-size:9px}.lead-post{border-top:3px solid var(--ink)}.pagination{font-size:10px;margin-top:25px;gap:10px}.page-number{font-size:11px}.closing-note{padding-top:33px;padding-bottom:35px}.closing-note p{font-size:30px}.closing-note p>span{font-size:45px;margin-left:20px}.closing-decoration{font-size:160px;right:-10px;top:50px}.closing-note .micro{font-size:8px}.site-footer{padding:30px 23px 22px;gap:25px}.site-footer>nav{gap:17px;font-size:10px}.footer-name{font-size:20px}.footer-meta{gap:15px;flex-wrap:wrap;font-size:8px}.footer-meta>span:nth-child(2){display:none}.article-header{padding-top:28px}.back-link{margin-bottom:30px;font-size:11px}.article-header h1{font-size:30px;line-height:1.5;letter-spacing:-.5px}.article-header .eyebrow{font-size:9px;flex-wrap:wrap}.article-meta{flex-wrap:wrap;font-size:9px;gap:15px}.reading-layout{padding-top:30px;padding-bottom:35px}.gh-content{font-size:16px;line-height:1.95}.gh-content h2{font-size:23px}.gh-content h3{font-size:20px}.gh-content pre{padding:15px;font-size:12px}.adjacent-posts{gap:25px;grid-template-columns:1fr;padding-top:25px;padding-bottom:30px}.adjacent-posts a+a{padding-top:20px;border-top:1px solid var(--line)}.archive-header{padding-top:30px;padding-bottom:30px}.archive-header h1{font-size:40px}.archive-header h1 span{font-size:30px}.error-page h1{font-size:110px}.skip-link{left:20px}.gh-content .kg-bookmark-thumbnail{display:none}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}
/* Original identity, compact tools, and a search panel within the page. */
.wordmark{display:flex;align-items:center;gap:12px}.wordmark>.wordmark-copy{font:inherit;letter-spacing:normal;margin:0;display:block}.wordmark-copy>span{font:8px var(--mono);letter-spacing:1.2px;display:block;margin-top:9px}.wordmark>.mobile-brand-mark{display:none;margin:0}.rail-mark{width:38px}.rail-bottom .rail-number{font:11px var(--mono)}.rail-backtop{display:grid;place-items:center;width:38px;height:38px;color:var(--muted);border:1px solid transparent}.rail-backtop svg{width:20px;height:20px;stroke:currentColor;stroke-width:1.5}.rail-backtop:hover{color:var(--ink);border-color:var(--line);background:var(--surface)}.header-tools{gap:10px}.appearance-menu{position:relative}.appearance-menu>summary{list-style:none;color:var(--muted);cursor:pointer}.appearance-menu>summary::-webkit-details-marker{display:none}.appearance-menu>summary:hover,.appearance-menu[open]>summary{color:var(--ink)}.appearance-options{position:absolute;z-index:60;top:calc(100% + 15px);right:0;width:170px;padding:15px 12px 10px;border:1px solid var(--line);background:var(--paper);box-shadow:0 8px 24px #0000000c}.appearance-options>.micro{display:block;font-size:8px;margin:0 7px 10px;white-space:nowrap}.appearance-options button{width:100%;display:flex;align-items:center;justify-content:space-between;text-align:left;font-size:12px;padding:9px 8px;color:var(--muted)}.appearance-options button:hover{background:var(--surface);color:var(--ink)}.appearance-options button[aria-pressed=true]{color:var(--ink);font-weight:600}.appearance-options button span{visibility:hidden}.appearance-options button[aria-pressed=true] span{visibility:visible}.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}.search-dialog{color:var(--ink);background:var(--paper);border:1px solid var(--line);padding:0;width:min(660px,calc(100% - 32px));max-height:min(680px,calc(100dvh - 64px));margin:auto;box-shadow:0 20px 90px #0003;overflow:hidden}.search-dialog[open]{display:flex;flex-direction:column}.search-dialog::backdrop{background:#12151199}.search-heading{padding:16px 25px 9px;display:flex;align-items:center;justify-content:space-between;gap:10px}.search-heading .micro{font-size:9px}.search-close{color:var(--muted);width:28px;height:28px}.search-close:hover{color:var(--ink);background:var(--surface)}.search-field{margin:0 25px;display:flex;align-items:center;gap:15px;border-bottom:2px solid var(--ink);padding:8px 0 15px}.search-field>svg{width:21px;height:21px;stroke:currentColor;stroke-width:1.5;flex-shrink:0}.search-field input{min-width:0;width:100%;background:transparent;border:0;outline:none;color:var(--ink);font-size:21px;padding:0;border-radius:0;height:36px}.search-field input::placeholder{color:var(--muted);font-size:18px}.search-field input:focus-visible{outline:none}.search-status{font-size:11px;color:var(--muted);margin:14px 25px 6px;min-height:18px;flex-shrink:0}.search-results{padding:0 25px;margin:0;list-style:none;overflow:auto;overscroll-behavior:contain;min-height:100px}.search-entry{border-bottom:1px solid var(--line)}.search-entry:last-child{border:0}.search-entry a{display:block;padding:16px 0}.search-entry a:hover .search-result-title{text-decoration:underline;text-underline-offset:4px}.search-result-title{display:block;font-size:16px;line-height:1.65;overflow-wrap:anywhere}.search-result-meta{display:flex;align-items:center;gap:12px;margin-top:8px;font-size:10px;color:var(--muted)}.search-result-meta time{font-family:var(--mono);white-space:nowrap}.search-result-meta>span:last-child{margin-left:auto;font-size:18px;color:var(--ink)}.search-result-excerpt{display:none}.search-bottom{margin-top:12px;padding:13px 25px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:15px;background:var(--surface);font-size:10px;color:var(--muted);flex-shrink:0}.search-bottom kbd{font:9px var(--mono);border:1px solid var(--line);padding:2px 4px;margin-right:4px}body.search-open{overflow:hidden}.gh-content .migration-remark42{border-top:1px solid var(--line);padding-top:30px}.gh-content .migration-remark42 h2{display:flex;align-items:center;gap:15px;font-size:23px;border:0;margin:0 0 22px;padding:0}.gh-content .migration-remark42 h2:after{content:"TRANSMISSION / 留下你的想法";font:9px var(--mono);letter-spacing:1px;color:var(--muted)}
@media(max-width:1000px){.wordmark-copy>span{font-size:7px}.rail-mark{width:32px}}
@media(max-width:600px){.wordmark>.mobile-brand-mark{display:block;width:30px}.wordmark{gap:10px}.wordmark strong{font-size:21px;letter-spacing:3px}.wordmark-copy>span{font-size:6px;letter-spacing:.6px;margin-top:7px}.header-tools{gap:5px}.appearance-menu>summary{width:27px}.appearance-options{right:-28px;top:calc(100% + 14px)}.search-dialog{width:calc(100% - 24px);max-height:calc(100dvh - 40px)}.search-heading{padding:13px 18px 8px}.search-heading .micro{font-size:8px}.search-field{margin:0 18px;gap:10px}.search-field input{font-size:19px}.search-field input::placeholder{font-size:16px}.search-status{margin:12px 18px 5px}.search-results{padding:0 18px}.search-result-title{font-size:15px}.search-bottom{padding:12px 18px;font-size:9px}.search-bottom>span:first-child{max-width:180px}.gh-content .migration-remark42 h2:after{font-size:8px;letter-spacing:0}}
@media(max-width:359px){.site-header{padding-left:16px;padding-right:16px}.wordmark{gap:8px}.wordmark>.mobile-brand-mark{width:25px}.wordmark strong{font-size:19px}.wordmark-copy>span{font-size:5.5px;letter-spacing:.4px}.header-tools{gap:2px}}

.search-retry{align-self:flex-start;margin:10px 25px;padding:8px 13px;background:var(--ink);color:var(--paper);font-size:12px}.search-retry[hidden]{display:none}
.appearance-menu>summary svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.5}.appearance-menu>summary:focus-visible{outline:2px solid var(--ink);outline-offset:5px}

/* Quiet motion: local feedback, one survey pass, then stillness. */
.appearance-options .motion-toggle{border-top:1px solid var(--line);margin-top:7px;padding-top:12px;gap:10px;font-weight:400}.appearance-options .motion-state{visibility:visible;font-size:10px;font-weight:400;color:var(--muted)}.motion-toggle:disabled{cursor:default;color:var(--muted)}
.survey-trigger{display:flex;align-items:center;gap:7px;padding:4px 0;color:var(--muted);font:10px var(--sans);letter-spacing:1px}.survey-trigger[hidden]{display:none}.survey-trigger>span{font:15px var(--mono)}.survey-trigger:hover{color:var(--ink)}.visual-bottom{min-height:32px}
.topography-base{opacity:.5}.topography-traces{opacity:0;pointer-events:none;stroke:var(--muted)}.contour-trace{opacity:0;stroke-dasharray:1;stroke-dashoffset:1}
.post-card:focus-within{border-color:var(--muted)}.primary-link>span:last-child,.card-foot a span,.text-link>span{display:inline-block}.post-card:before{pointer-events:none}
@media(prefers-reduced-motion:no-preference){
  :root:not([data-motion="reduce"]) .is-surveying .topography-traces{opacity:1}
  :root:not([data-motion="reduce"]) .is-surveying .contour-trace{animation:field-survey 850ms cubic-bezier(.22,.61,.36,1) both}
  :root:not([data-motion="reduce"]) .is-surveying .contour-trace+ .contour-trace{animation-delay:100ms}
  :root:not([data-motion="reduce"]) .search-dialog[open]{animation:field-panel-in 140ms ease-out}
  :root:not([data-motion="reduce"]) .appearance-menu[open] .appearance-options{animation:field-panel-in 120ms ease-out}
  :root:not([data-motion="reduce"]) .post-card:before{transition:width 160ms ease-out,height 160ms ease-out}
  :root:not([data-motion="reduce"]) .post-card:focus-within:before{width:12px;height:12px}
  :root:not([data-motion="reduce"]) :is(.primary-link>span:last-child,.card-foot a span,.text-link>span,.rail-backtop svg){transition:transform 160ms ease-out}
  :root:not([data-motion="reduce"]) :is(.primary-link:focus-visible>span:last-child,.card-foot a:focus-visible span,.text-link:focus-visible>span){transform:translate(2px,-2px)}
  :root:not([data-motion="reduce"]) .rail-backtop:focus-visible svg{transform:translateY(-2px)}
  @media(hover:hover) and (pointer:fine){
    :root:not([data-motion="reduce"]) .post-card:hover:before{width:12px;height:12px}
    :root:not([data-motion="reduce"]) :is(.primary-link:hover>span:last-child,.card-foot a:hover span,.text-link:hover>span){transform:translate(2px,-2px)}
    :root:not([data-motion="reduce"]) .rail-backtop:hover svg{transform:translateY(-2px)}
  }
}
@keyframes field-survey{0%{stroke-dashoffset:1;opacity:0}18%{opacity:.55}75%{stroke-dashoffset:0;opacity:.55}100%{stroke-dashoffset:0;opacity:0}}
@keyframes field-panel-in{from{opacity:.65}to{opacity:1}}
:root[data-motion="reduce"]{scroll-behavior:auto}:root[data-motion="reduce"] *,:root[data-motion="reduce"] *:before,:root[data-motion="reduce"] *:after{animation:none!important;transition:none!important}

/* Wuling-inspired water, architecture and suspended relay ornaments. */
.hero{min-height:500px;border-bottom:1px solid var(--line)}.hero-copy{align-self:center}.hero h1{margin-bottom:38px}.hero .eyebrow{margin-bottom:24px}.hero-visual{margin:0}.hero .terrain-art{max-height:410px}.card-schematic{justify-content:center}.search-bottom{justify-content:flex-end}
.appearance-options{width:250px}.appearance-options .motion-toggle{font-size:11px;white-space:nowrap}.motion-state{flex-shrink:0}
.drift-ornament{pointer-events:none;user-select:none}.charm-body{transform-origin:50% 0;transform:rotate(var(--charm-turn,0deg))}.talisman-art{display:block;width:100%;height:auto;overflow:visible}.talisman-tail{transform-origin:42px 187px;transform:rotate(var(--tail-turn,0deg))}
.rail-charm{position:absolute;top:116px;width:46px;left:50%;margin-left:-23px;opacity:.85}.edge-charm{position:fixed;top:150px;right:26px;width:48px;z-index:5;opacity:.72}.hero-charm{display:none}
.landscape-ribbon{overflow:hidden;border-top:1px solid var(--line);height:120px;background:var(--paper);display:flex;align-items:center;mask-image:linear-gradient(to right,transparent,#000 7%,#000 93%,transparent)}.ribbon-track{display:flex;flex-shrink:0;width:max-content}.ribbon-segment{display:flex;flex-shrink:0}.ribbon-tile{display:block;width:600px;height:100px;flex-shrink:0}
@media(prefers-reduced-motion:no-preference){
  :root:not([data-motion="reduce"]) .ribbon-track{animation:water-ribbon 180s linear infinite;animation-play-state:paused}
  :root:not([data-motion="reduce"]) .ribbon-running .ribbon-track{animation-play-state:running}
  body.search-open .ribbon-track{animation-play-state:paused!important}
}
@keyframes water-ribbon{to{transform:translateX(-50%)}}
:root[data-motion="reduce"] .tassel-weight,:root[data-motion="reduce"] .charm-body,:root[data-motion="reduce"] .talisman-tail,:root[data-motion="reduce"] .ribbon-track{transform:none!important}
@media(prefers-reduced-motion:reduce){.charm-body,.talisman-tail,.tassel-weight,.ribbon-track{transform:none!important}}
@media(max-width:1100px){.edge-charm{display:none}.rail-charm{width:36px;margin-left:-18px}.hero{min-height:440px}}
@media(max-height:720px){.rail-charm{top:110px;width:30px;margin-left:-15px}}
@media(max-width:600px){.hero{min-height:0;padding-top:35px;padding-bottom:24px;gap:22px}.hero-copy{align-self:stretch}.hero .eyebrow{margin-bottom:20px}.hero h1{margin-bottom:25px}.hero .terrain-art{max-height:280px}.hero-charm{display:block;position:absolute;top:23px;right:14px;width:30px;opacity:.65}.landscape-ribbon{height:90px}.ribbon-tile{width:450px;height:75px}.appearance-options{right:-28px}}