/* Chinese history library: fluid layouts for phones, tablets and desktops. */
:root{color-scheme:light;--bg:#f7f5ef;--paper:#fffdf8;--ink:#262d29;--muted:#77796f;--line:#e4e1d7;--accent:#923d2f;--accent-soft:#f2e8e0;--green:#536652;--reader-size:20px;--serif:"Noto Serif CJK SC","Source Han Serif SC","Songti SC","STSong","SimSun",serif;--sans:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif}
html[data-theme=dark]{color-scheme:dark;--bg:#202420;--paper:#282d28;--ink:#e7e5da;--muted:#afb0a3;--line:#41483f;--accent:#df9c83;--accent-soft:#3c3029;--green:#b5c5a5}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:14px;line-height:1.65;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit}button:disabled{cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--accent);outline-offset:4px}svg{width:20px;height:20px;flex-shrink:0}button{border:0;background:none}h1,h2,h3,p{margin:0}img{max-width:100%;height:auto}a[aria-disabled=true],.disabled{color:var(--muted);cursor:default}[hidden]{display:none!important}.js-only{display:none!important}.enhanced .js-only{display:flex!important}.skip-link{position:fixed;left:20px;top:-80px;z-index:30;background:var(--paper);padding:12px 20px}.skip-link:focus{top:10px}.eyebrow{font-size:11px;letter-spacing:2px;color:var(--muted);font-weight:550}.site-header{position:sticky;top:0;z-index:20;background:var(--bg);border-bottom:1px solid var(--line)}.header-inner{max-width:1440px;min-height:84px;padding:0 44px;margin:auto;display:flex;align-items:center;gap:38px}.brand{display:flex;align-items:center;gap:13px;font-family:var(--serif);font-size:21px;font-weight:600;letter-spacing:1px;flex-shrink:0}.brand-seal{width:39px;height:43px;display:grid;place-items:center;background:var(--accent);color:var(--paper);font-size:27px;border-radius:3px;position:relative}.brand-seal:after{content:"";position:absolute;inset:3px;border:1px solid #ffffff57;border-radius:1px}.brand small{display:block;font-family:var(--sans);font-size:8px;letter-spacing:2px;color:var(--muted);margin-top:1px;font-weight:450}.header-nav{display:flex;gap:30px;margin-left:auto;align-items:center}.header-nav a{min-height:44px;display:flex;align-items:center;color:var(--muted);font-size:13px}.header-nav a:hover,.header-nav a[aria-current]{color:var(--accent)}.theme-toggle{height:42px;width:42px;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:50%;color:var(--muted)}.theme-toggle:hover{background:var(--accent-soft);color:var(--accent)}.app-shell{max-width:1440px;margin:auto;padding:46px 44px 64px;display:grid;grid-template-columns:176px minmax(0,1fr);gap:54px}.main-content{min-width:0}.side-sticky{position:sticky;top:124px}.sidebar .eyebrow{margin:1px 12px 22px}.side-link{display:flex;align-items:center;gap:10px;min-height:46px;padding:10px 12px;margin:4px 0;color:var(--muted);border-radius:4px;font-size:13px}.side-link>span{margin-left:auto;font-size:11px;font-variant-numeric:tabular-nums}.side-link:hover{background:var(--accent-soft);color:var(--accent)}.side-link.active{background:var(--accent-soft);color:var(--accent);font-weight:600}.side-link:not(:has(svg)){padding-left:42px}.side-note{border-top:1px solid var(--line);margin:36px 12px 0;padding-top:28px}.small-seal{border:1px solid var(--accent);color:var(--accent);padding:2px 4px;font-family:var(--serif);font-size:15px;border-radius:2px}.side-note p{font-family:var(--serif);font-size:16px;line-height:2;letter-spacing:1px;margin:18px 0 13px}.side-note>span:last-child{font-size:10px;color:var(--muted)}.side-book{border-top:1px solid var(--line);margin-top:26px;padding-top:22px}.side-book .eyebrow{display:block;margin-bottom:8px}.side-book strong{display:block;padding:0 12px;font-family:var(--serif);font-size:19px;font-weight:500;line-height:1.7;overflow-wrap:anywhere}.side-book .side-link{padding-left:12px;color:var(--accent)}
.library-hero{display:flex;justify-content:space-between;align-items:center;min-height:260px;border-bottom:1px solid var(--line);padding:0 10px 32px 0;gap:20px}.library-hero .eyebrow{display:flex;align-items:center;gap:10px;font-size:11px;letter-spacing:3px;color:var(--green)}.accent-line{width:22px;height:1px;background:var(--green)}.library-hero h1{font-family:var(--serif);font-weight:500;font-size:clamp(34px,4vw,53px);letter-spacing:3px;line-height:1.5;margin:18px 0 14px}.library-hero h1 span{color:var(--accent)}.hero-description{color:var(--muted);font-size:14px;line-height:1.95}.mobile-break{display:none}.hero-stats{margin-top:23px;display:flex;align-items:center;gap:20px;font-size:12px;color:var(--muted)}.hero-stats strong{font-family:Georgia,serif;font-size:24px;font-weight:400;color:var(--ink);margin-right:7px}.hero-stats i{height:12px;width:1px;background:var(--line)}.hero-art{width:195px;flex-shrink:0;position:relative;display:flex;justify-content:center}.art-frame{height:192px;width:155px;border:1px solid #c9ba9b;border-radius:80px 80px 3px 3px;display:flex;align-items:center;justify-content:center;gap:12px;position:relative}.art-frame:before{content:"";inset:9px;position:absolute;border:1px solid var(--line);border-radius:80px 80px 0 0}.art-frame>span{font-size:86px;font-family:var(--serif);font-weight:300;color:#94816a;line-height:1;z-index:1}.art-frame small{writing-mode:vertical-rl;font-family:var(--serif);font-size:12px;letter-spacing:6px;color:var(--accent)}.hero-art>i{width:116px;height:116px;position:absolute;border:1px solid var(--line);border-radius:50%;top:44px;right:-12px;z-index:-1}
.library-tools{margin-top:30px;display:flex;gap:20px;align-items:center;justify-content:space-between}.search-field{display:flex;align-items:center;gap:12px;min-height:48px;background:var(--paper);border:1px solid var(--line);padding:0 15px;border-radius:5px;color:var(--muted);min-width:0}.search-field:focus-within{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-soft)}.search-field input{min-width:0;width:100%;background:transparent;border:0;outline:0!important;padding:12px 0;color:var(--ink);font-size:13px}.search-field input::placeholder{color:var(--muted)}.search-field kbd{font-family:var(--sans);font-size:11px;border:1px solid var(--line);padding:0 5px;border-radius:3px}.library-tools .search-field{flex:1;max-width:440px}.filter-tabs{display:flex;gap:4px;flex-shrink:0}.filter-tabs button{padding:10px 16px;min-height:44px;border-radius:4px;font-size:12px;color:var(--muted)}.filter-tabs button.selected{background:var(--ink);color:var(--paper)}.search-summary{margin:12px 0 8px;font-size:11px;color:var(--muted)}.book-section{margin-top:33px;scroll-margin-top:108px}.section-heading{display:flex;align-items:center;gap:25px;margin-bottom:20px}.section-heading h2{font-family:var(--serif);font-size:24px;font-weight:500;letter-spacing:2px;display:flex;align-items:center;gap:12px}.section-heading h2>span{font-family:var(--sans);font-size:11px;letter-spacing:0;color:var(--muted);border:1px solid var(--line);border-radius:50%;height:24px;min-width:24px;display:grid;place-items:center}.section-heading p{font-size:11px;color:var(--muted);margin-top:6px}.section-rule{height:1px;flex:1;background:var(--line)}.book-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.book-card{background:var(--paper);border:1px solid var(--line);border-radius:5px;padding:20px 21px 0;min-width:0;position:relative;display:flex;flex-direction:column;transition:transform .18s,border-color .18s,box-shadow .18s}.book-card:hover:not(.unavailable){border-color:#ba9a85;box-shadow:0 5px 16px #4e382508;transform:translateY(-3px)}.card-top{display:flex;align-items:center;justify-content:space-between;color:var(--muted)}.card-number{font-family:Georgia,serif;font-size:15px;color:#aaa38e}.card-category{font-size:9px;letter-spacing:1px;padding:2px 6px;border:1px solid var(--line);border-radius:3px}.book-title{font-family:var(--serif);font-size:22px;font-weight:500;line-height:1.7;margin:17px 0 6px;letter-spacing:.5px;overflow-wrap:anywhere}.book-author{font-size:11px;color:var(--muted);line-height:1.8;margin-bottom:20px;overflow-wrap:anywhere;min-height:20px}.card-bottom{display:flex;align-items:center;justify-content:space-between;margin-top:auto;min-height:42px;border-top:1px solid var(--line);color:var(--green);font-size:10px;letter-spacing:1px}.card-bottom svg{width:17px;height:17px}.unavailable{background:transparent}.unavailable .book-title{color:var(--muted)}.unavailable .card-bottom{color:var(--muted)}.empty-state{text-align:center;border:1px dashed var(--line);padding:55px 20px;margin-top:35px;border-radius:6px}.empty-state h2{font-family:var(--serif);font-size:26px;font-weight:500}.empty-state p{color:var(--muted);margin:14px 0 20px}.button{display:inline-flex;gap:13px;align-items:center;justify-content:center;min-height:44px;padding:10px 20px;border:1px solid var(--line);border-radius:4px;font-size:13px;background:var(--paper)}.button.primary{background:var(--accent);color:#fff8ef;border-color:var(--accent)}.button:hover{filter:brightness(.95)}
.document-topline,.reader-topline{display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line);padding-bottom:17px;font-size:12px;color:var(--muted)}.back-link{display:inline-flex;gap:4px;align-items:center;min-height:44px;font-size:12px;color:var(--muted)}.back-link:hover{color:var(--accent)}.back-link svg{width:17px;height:17px}.book-actions{display:flex;justify-content:space-between;align-items:center;gap:14px;margin:24px 0 0}.book-actions p{color:var(--muted);font-size:12px}.book-actions strong{font-family:Georgia,serif;font-size:24px;font-weight:400;color:var(--ink);margin-right:5px}.toc-tools{gap:15px;align-items:center;margin:24px 0 0}.toc-tools .search-field{width:100%;max-width:430px}.toc-tools>span{font-size:11px;color:var(--muted);flex-shrink:0}.original-content{min-width:0;overflow-wrap:anywhere}.legacy-breadcrumb,.legacy-pagination,.empty-row,.empty-cell{display:none!important}.source-table,.source-row,.source-cell,.table-group{min-width:0}.book-document .document-title{font-family:var(--serif);font-size:40px;font-weight:500;letter-spacing:2px;line-height:1.5;margin:30px 0 12px}.book-metadata{font-size:13px;color:var(--muted);margin-bottom:25px}.book-description{font-family:var(--serif);font-size:16px;line-height:1.95;color:var(--muted);margin:25px 0 30px}.book-description a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}.book-document .source-row:has(.book-cover){display:flex;gap:25px;align-items:flex-start;padding:0 0 8px;border-bottom:1px solid var(--line)}.book-cover{order:2;flex:0 0 92px;margin-top:30px}.book-cover img{display:block;width:92px;box-shadow:4px 5px 0 var(--line);border-radius:2px}.book-description p{margin:12px 0}.chapter-catalog{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:32px}.toc-row,.chapter-catalog .table-group{display:contents}.toc-entry{background:var(--paper);border:1px solid var(--line);padding:12px 16px;border-radius:4px;line-height:2.2;min-width:0;overflow-wrap:anywhere;font-size:13px}.toc-entry a{display:inline-block;min-height:34px;padding:2px 4px;border-radius:3px;color:var(--green)}.toc-entry a:first-of-type{font-weight:550;color:var(--ink)}.toc-entry a:hover{background:var(--accent-soft);color:var(--accent)}.toc-entry a[aria-disabled]{color:var(--muted)}.toc-heading{grid-column:1/-1;font-family:var(--serif);font-size:21px;letter-spacing:1px;margin:20px 0 6px}.toc-heading:first-child{margin-top:0}.toc-entry br{display:none}.toc-empty{padding:30px 0;color:var(--muted)}.book-document .original-content>div>div:last-child:not(.source-table){color:var(--muted);font-size:13px}.book-document .original-content>div>div:last-child:not(.source-table) a{display:inline-block;min-height:44px;padding:10px}.text-strong{font-weight:600}sup{color:var(--accent);font-size:.7em}
.page-reader .app-shell{grid-template-columns:176px minmax(0,1fr);gap:54px;padding-top:32px}.reading-sheet{background:var(--paper);border:1px solid var(--line);border-radius:5px;max-width:850px;margin:auto;padding:20px 54px 44px;min-width:0}.reading-controls{display:flex;align-items:center;gap:7px;font-size:11px;color:var(--muted)}.reading-controls button{width:40px;height:40px;font-family:Georgia,serif;font-size:17px;border:1px solid var(--line);border-radius:4px;color:var(--ink)}.reading-controls output{font-variant-numeric:tabular-nums;min-width:20px;text-align:center}.reading-controls button:hover{background:var(--accent-soft)}.reading-controls button:disabled{opacity:.4}.reading-sheet .document-title{font-family:var(--serif);font-size:28px;line-height:1.65;font-weight:500;letter-spacing:1px;text-align:center;margin:32px 0 34px;color:var(--ink)}.reading-sheet .prose{font-family:var(--serif);font-size:var(--reader-size);line-height:2.05;letter-spacing:.035em;overflow-wrap:anywhere;text-align:justify}.prose a{color:var(--accent);text-decoration:underline;text-underline-offset:4px}.prose hr{border:0;border-top:1px solid var(--line);margin:30px 0}.original-content hr{border:0;border-top:1px solid var(--line)}.reading-sheet .source-row>.prose:empty{display:none}.table-scroll{width:100%;max-width:100%;overflow:auto;overscroll-behavior-x:contain;margin:24px 0;border:1px solid var(--line);border-radius:3px}.data-table{border-collapse:collapse;min-width:100%;font-family:var(--serif);font-size:16px;line-height:1.8}.data-table td,.data-table th{padding:9px 12px;border:1px solid var(--line);min-width:100px;vertical-align:top}.data-table th{background:var(--bg)}.reading-end{display:flex;align-items:center;justify-content:center;gap:17px;color:var(--muted);font-family:var(--serif);font-size:11px;margin-top:36px}.reading-end span{width:50px;height:1px;background:var(--line)}.reader-pager{position:sticky;bottom:0;z-index:15;background:var(--bg);border-top:1px solid var(--line);padding:12px 24px}.reader-pager>div{display:flex;align-items:center;justify-content:space-between;max-width:780px;margin:auto;gap:15px}.chapter-step,.pager-index{display:flex;align-items:center;justify-content:center;gap:9px;min-height:44px;font-size:13px;padding:8px 16px;border:1px solid var(--line);border-radius:4px;background:var(--paper)}.chapter-step:not(.disabled):hover,.pager-index:hover{border-color:var(--accent);color:var(--accent)}.chapter-step.disabled{opacity:.5;background:none}.pager-index{border-color:transparent;background:none}.site-footer{max-width:1440px;margin:auto;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:15px;padding:26px 44px;color:var(--muted);font-size:11px}.site-footer>span:first-child{font-family:var(--serif);font-size:15px;letter-spacing:1px}.site-footer a{min-height:44px;display:flex;align-items:center}.site-footer a:hover{color:var(--accent)}.page-reader .site-footer{padding-bottom:30px}
.toc-description{grid-column:1/-1;font-family:var(--serif);font-size:16px;line-height:1.95;color:var(--muted);margin-bottom:18px}.toc-description a{color:var(--accent)}
@media(min-width:1600px){.book-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.app-shell{max-width:1560px}.header-inner,.site-footer{max-width:1560px}}
@media(max-width:1199px){.app-shell,.page-reader .app-shell{grid-template-columns:minmax(0,1fr);padding:32px 36px 50px;gap:0;max-width:1100px}.sidebar{display:none}.header-inner{padding:0 36px}.book-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.library-hero{min-height:245px}.reading-sheet{max-width:840px}.site-footer{padding-left:36px;padding-right:36px}}
@media(max-width:900px){.book-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.header-nav{gap:22px}.header-inner{gap:20px}.reading-sheet{padding:18px 36px 36px}.hero-art{width:170px}.library-tools{gap:12px}.filter-tabs button{padding:10px 12px}.chapter-catalog{grid-template-columns:repeat(2,minmax(0,1fr))}.site-footer{font-size:10px}}
@media(max-width:599px){html{scroll-padding-top:80px}.header-inner{padding:0 20px;min-height:72px;gap:12px}.brand{gap:9px;font-size:17px;letter-spacing:.5px}.brand-seal{width:31px;height:35px;font-size:23px}.brand small{font-size:6px;letter-spacing:1.25px}.header-nav{gap:0;margin-left:auto}.header-nav a{font-size:12px}.header-nav a:not(:first-child){display:none}.theme-toggle{width:36px;height:36px;border:0}.app-shell,.page-reader .app-shell{padding:28px 20px 42px}.library-hero{min-height:0;padding:0 0 27px;gap:0}.library-hero .eyebrow{font-size:10px;letter-spacing:2px;gap:7px}.library-hero h1{font-size:36px;letter-spacing:1px;margin:15px 0 12px}.hero-description{font-size:12px;line-height:1.9}.mobile-break{display:initial}.hero-art{display:none}.hero-stats{margin-top:18px;gap:13px;font-size:11px}.hero-stats strong{font-size:24px;margin-right:4px}.library-tools{flex-direction:column;align-items:stretch;margin-top:23px;gap:12px}.library-tools .search-field{max-width:none;min-height:48px}.search-field input{font-size:16px}.search-field kbd{display:none}.filter-tabs{justify-content:flex-start;gap:5px}.filter-tabs button{font-size:12px;flex:1;padding:9px 10px}.search-summary{font-size:10px;margin-top:10px}.book-section{margin-top:25px;scroll-margin-top:90px}.section-heading{margin-bottom:15px;gap:15px}.section-heading h2{font-size:22px}.section-heading p{font-size:10px}.book-grid{grid-template-columns:minmax(0,1fr);gap:12px}.book-card{padding:18px 20px 0;display:grid;grid-template-columns:minmax(0,1fr) 35px;column-gap:8px}.card-top{grid-column:1/-1}.card-number{font-size:13px}.book-title{font-size:23px;margin:10px 0 3px;grid-column:1;grid-row:2}.book-author{grid-column:1;grid-row:3;margin-bottom:16px;font-size:11px}.card-bottom{border:0;grid-column:2;grid-row:2/4;align-self:center;justify-content:flex-end;min-height:44px}.card-bottom>span{display:none}.card-bottom svg{width:22px;height:22px}.unavailable .card-category{color:var(--muted)}.section-rule{min-width:15px}.document-topline{padding-bottom:10px}.book-actions{margin-top:18px}.book-actions .button{padding:10px 16px}.book-document .document-title{font-size:32px;margin-top:24px}.book-metadata{font-size:12px}.book-description{font-size:16px;line-height:1.9;margin-top:20px}.book-document .source-row:has(.book-cover){gap:17px}.book-cover{flex-basis:64px;margin-top:23px}.book-cover img{width:64px}.toc-tools{flex-wrap:wrap;margin-top:20px;gap:6px}.toc-tools>span{font-size:10px}.chapter-catalog{grid-template-columns:minmax(0,1fr);gap:9px;margin-top:24px}.toc-entry{padding:10px 13px;font-size:14px}.toc-entry a{min-height:40px;padding:5px 4px}.toc-heading{font-size:20px;margin-top:18px}.page-reader .app-shell{padding:0 0 25px}.reading-sheet{border:0;border-radius:0;padding:8px 22px 32px;width:100%;max-width:none}.reader-topline{padding-bottom:7px;gap:5px}.back-link{font-size:12px}.reading-controls{gap:4px}.reading-controls>span{display:none}.reading-controls button{width:38px;height:38px;font-size:16px}.reading-controls output{font-size:11px;min-width:20px}.reading-sheet .document-title{font-size:25px;margin:25px 0 26px;line-height:1.7}.reading-sheet .prose{font-size:var(--reader-size);line-height:2;letter-spacing:.015em}.reader-pager{padding:9px 16px calc(9px + env(safe-area-inset-bottom))}.reader-pager>div{gap:8px}.chapter-step,.pager-index{font-size:12px;padding:8px 10px;gap:3px;min-height:44px}.chapter-step svg,.pager-index svg{width:17px;height:17px}.site-footer{padding:20px;flex-wrap:wrap;gap:8px;font-size:10px}.site-footer>span:first-child{font-size:13px}.site-footer>span:nth-child(2){display:none}.site-footer a{margin-left:auto}.page-reader .site-footer{padding-bottom:22px}.reading-end{margin-top:25px}.data-table{font-size:15px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}
@media print{.site-header,.sidebar,.reader-pager,.site-footer,.reading-controls,.reader-topline,.book-actions,.toc-tools{display:none!important}.app-shell,.page-reader .app-shell{display:block;padding:0}.reading-sheet{border:0;padding:0;max-width:none}body{background:#fff;color:#000}.prose{font-size:12pt!important}.table-scroll{overflow:visible}.book-grid{grid-template-columns:repeat(3,1fr)}a{color:#000}}