:root{--ink:#18263a;--muted:#617087;--blue:#2458dc;--line:#dce3ec;--soft:#f7f9fc}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:var(--ink);font:16px/1.8 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline;text-underline-offset:5px}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #98b4ff;outline-offset:4px}.wrap{max-width:1288px;margin:auto;padding:0 24px}header{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:84px;border-bottom:1px solid var(--line)}.brand{font:700 30px Georgia,serif;color:var(--ink);letter-spacing:-.8px}nav{display:flex;gap:34px;font-size:15px}nav a{color:var(--ink)}nav a.active{color:var(--blue);border-bottom:2px solid var(--blue)}h1,h2,h3{line-height:1.4;color:var(--ink)}h1,.section-title,.entry h2{font-family:"Songti SC","Noto Serif CJK SC",Georgia,serif}h1{font-size:48px;letter-spacing:-1px;margin:34px 0 10px;font-weight:700}.intro{font-size:22px;margin:0 0 10px}.meta{color:var(--muted);font-size:14px}.filters{display:grid;grid-template-columns:1fr 220px 220px;gap:12px;margin:22px 0 32px}input,select,button{font:15px/1.5 inherit;font-family:inherit;font-size:15px;color:var(--ink)}input,select{height:50px;width:100%;border:1px solid #bdcadb;background:#fff;border-radius:4px;padding:10px 15px}input[type=search]{padding-left:42px}.search{position:relative}.search svg{position:absolute;left:14px;top:15px;width:20px;height:20px;color:var(--muted)}.layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:36px}.section-title{font-size:28px;margin:0}.section-head{padding-bottom:16px;border-bottom:1px solid var(--line)}.section-head p{margin:4px 0 0}.entry{padding:23px 0 25px;border-bottom:1px solid var(--line)}.entry h2{font-size:24px;margin:5px 0 9px;overflow-wrap:anywhere}.entry h2 a{color:var(--ink)}.entry p{font-size:17px;margin:8px 0;color:#425169}.entry .links{display:flex;gap:22px;flex-wrap:wrap;margin-top:12px;font-size:14px}.entry .links a{display:inline-flex;align-items:center;gap:6px}.arrow{width:15px;height:15px;vertical-align:middle}.sidebar{border-left:1px solid var(--line);padding-left:28px}.sidebar h2{font-size:21px;margin:0 0 14px;padding-bottom:12px;border-bottom:1px solid var(--line)}.sidebar section{margin-bottom:40px}.dates{list-style:none;padding:0;margin:0}.dates li{margin:7px 0}.dates a{color:var(--muted)}.dates a.current{color:var(--blue)}.sub-link{display:block;margin:18px 0}.sub-link small{display:block;color:var(--muted);font-size:13px}.sub-link svg{margin-right:8px;vertical-align:-3px;width:19px;height:19px}footer{margin-top:42px;border-top:1px solid var(--line);padding:22px 0 30px;color:var(--muted);font-size:13px;display:flex;justify-content:space-between;gap:16px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.empty{padding:48px 0;color:var(--muted)}button{cursor:pointer;background:white;border:1px solid var(--line);border-radius:4px;padding:8px 16px}.reading{max-width:790px;margin:32px auto 60px}.reading h1{font-size:36px}.reading h2{font-size:25px;margin-top:38px}.reading p{margin:20px 0;overflow-wrap:anywhere}.reading a{overflow-wrap:anywhere}.reading blockquote{margin:24px 0;padding:1px 20px;border-left:3px solid var(--blue);background:var(--soft)}.reading li{margin:9px 0}.reading .lead{font-size:19px}.reading .actions{display:flex;gap:20px;flex-wrap:wrap;padding:18px 0;border-block:1px solid var(--line);margin:24px 0}.back{font-size:14px}.archive-row{display:block;padding:22px 0;border-bottom:1px solid var(--line)}.archive-row strong{display:block;font-size:21px;color:var(--ink)}.feed-url{display:block;background:var(--soft);border:1px solid var(--line);padding:12px;font:14px/1.7 monospace;overflow-wrap:anywhere}.notice{font-size:14px;color:var(--muted);border-left:2px solid var(--line);padding-left:16px}::selection{background:#dce7ff} @media(max-width:760px){.wrap{padding:0 20px}header{min-height:76px;gap:15px;align-items:flex-start;padding:18px 0;flex-direction:column}.brand{font-size:27px}nav{gap:25px;font-size:14px}h1{font-size:32px;margin-top:28px;letter-spacing:-.5px}.intro{font-size:17px}.filters{grid-template-columns:1fr 1fr;margin-bottom:25px}.search{grid-column:1/-1}.layout{display:block}.sidebar{border-left:0;border-top:1px solid var(--line);padding:28px 0 0;margin-top:30px;display:grid;grid-template-columns:1fr 1fr;gap:18px}.sidebar h2{font-size:19px}.entry h2{font-size:23px}.entry{padding:22px 0}.section-title{font-size:26px}.reading h1{font-size:30px}.reading{margin-top:24px}.reading h2{font-size:24px}footer{display:block}.reading .actions{gap:14px}.meta{font-size:13px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

footer{display:block}.footer-main{display:flex;justify-content:space-between;gap:16px}.registration{display:flex;justify-content:center;flex-wrap:wrap;gap:8px 22px;margin-top:18px;font-size:12px}.registration a{color:var(--muted)}@media(max-width:760px){.footer-main{display:block}.registration{flex-direction:column;align-items:center;gap:6px}}

.archive-group{margin:36px 0 44px}.archive-heading{display:flex;align-items:baseline;gap:16px;padding-bottom:10px;border-bottom:1px solid var(--line)}.reading .archive-heading h2{font-size:25px;margin:0}.archive-heading>a{margin-left:auto;font-size:14px;white-space:nowrap}.reading .archive-issue-title{font-size:14px;color:var(--muted);margin:10px 0 16px}.archive-items{list-style:none;padding:0;margin:0}.reading .archive-item{margin:0;padding:14px 0;border-bottom:1px solid var(--line)}.archive-item-title{display:block;font-size:19px;color:var(--ink);line-height:1.65;margin-bottom:4px}.archive-item-title:hover{color:var(--blue)}@media(max-width:400px){.archive-heading{gap:9px}.reading .archive-heading h2{font-size:22px}.archive-heading>a{font-size:13px}}

.filters{grid-template-columns:1fr 220px}#type{display:none}.filters label[for="type"]{display:none}.entry .paper-original,.paper-original{font-size:14px;color:var(--muted);line-height:1.6;overflow-wrap:anywhere}.paper-issues{margin-top:12px;font-size:13px}@media(max-width:760px){.filters{grid-template-columns:1fr}.search{grid-column:auto}}

/* Compact conversation-style navigation rail: preview on hover, jump on click/drag. */
.archive-group{scroll-margin-top:76px}.archive-rail{position:fixed;left:max(12px,calc((100vw - 1288px)/2 + 22px));top:50%;transform:translateY(-50%);z-index:15;display:block;width:38px;font:12px/1.4 -apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif}.date-track{position:relative;width:38px;max-height:50vh;cursor:pointer;touch-action:none;border-radius:7px;outline-offset:3px}.date-track:focus-visible{outline:2px solid #98b4ff}.date-mark{position:absolute;left:9px;width:13px;height:3px;background:#ccd3dc;border-radius:5px;transform:translateY(-50%);transition:width .12s,background .12s;pointer-events:none}.date-mark.current{width:21px;background:#566b86}.archive-rail.expanded .date-mark{background:#aeb9c9}.archive-rail.expanded .date-mark.current{width:26px;background:#263e5f}.date-preview{position:absolute;left:36px;width:310px;padding:8px;background:rgba(255,255,255,.97);border:1px solid #e3e8ee;border-radius:12px;box-shadow:0 8px 32px #18263a17;overflow:auto;backdrop-filter:blur(16px)}.date-preview[hidden]{display:none}.date-option{display:block;padding:9px 11px;border-radius:7px;color:#536278;text-decoration:none!important}.date-option:hover,.date-option:focus-visible,.date-option.selected{background:#f0f3f7;color:#18263a}.date-label{display:block;font-size:12px;font-weight:600;font-variant-numeric:tabular-nums}.date-summary{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-top:3px;font-size:11px;line-height:1.5;color:#7a8697}.archive-rail.dragging{user-select:none}.archive-rail.dragging .date-track{cursor:ns-resize}@media(max-width:1100px){.archive-rail{left:2px;width:30px}.date-track{width:30px}.date-mark{left:6px;width:10px}.date-mark.current{width:16px}.archive-rail.expanded .date-mark.current{width:20px}.archive-page.with-date-rail{padding-left:20px}.date-preview{left:30px;width:min(300px,calc(100vw - 48px))}}@media(prefers-reduced-motion:reduce){.date-mark{transition:none}}

/* Quiet inline sharing controls with a comfortable touch target. */
.share-button{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:44px;min-height:44px;padding:8px 10px;border:0;border-radius:8px;background:transparent;color:inherit;font:inherit;font-size:13px;cursor:pointer;vertical-align:middle}
.share-button svg{width:18px;height:18px;flex:none}.share-button:hover{background:rgba(100,116,139,.09)}.share-button:focus-visible{outline:2px solid #526c5f;outline-offset:2px}.share-button:disabled{opacity:.5;cursor:wait}.share-actions{margin:6px 0 16px}.links{flex-wrap:wrap}.share-status{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);z-index:1000;background:#273c33;color:white;padding:10px 18px;border-radius:24px;font-size:14px;box-shadow:0 4px 24px #0002}.share-dialog{box-sizing:border-box;width:min(440px,calc(100vw - 32px));border:1px solid #ddd;border-radius:16px;padding:24px;color:#26332d;background:#fff}.share-dialog::backdrop{background:#0004}.share-dialog h2{margin-top:0;font-size:20px}.share-dialog p{font-size:14px;color:#66716b}.share-dialog textarea{box-sizing:border-box;width:100%;padding:12px;border:1px solid #ccd3ce;border-radius:8px;font:inherit;font-size:14px;resize:vertical}.share-dialog form{text-align:right;margin-top:12px}
.share-button{white-space:nowrap}.archive-heading{flex-wrap:wrap}.archive-heading h2,.archive-heading .meta{white-space:nowrap}@media(max-width:600px){.archive-heading{display:grid;grid-template-columns:1fr auto;gap:4px 12px;align-items:center}.archive-heading>a{margin-left:0;justify-self:start}.archive-heading>.share-button{justify-self:end}}

.edition{display:inline-block;margin:18px 0 8px;padding:5px 10px;border:1px solid #d8e4ee;border-radius:4px;color:#0f4c81;background:#f2f6fa;font-size:13px;font-weight:600}
@media(max-width:640px){header{flex-wrap:wrap;gap:14px}header nav{width:100%;justify-content:space-between;gap:10px}header nav a{white-space:nowrap}}

.breadcrumbs{font-size:12px;line-height:1.6;color:var(--muted);margin:0 0 20px;overflow-wrap:anywhere}.breadcrumbs a{color:inherit}
.reading p>img{display:block;width:100%;max-width:100%;height:auto;margin:1.6rem auto;border-radius:16px;border:1px solid var(--line);background:#f4f7fa}