/* Shared editorial layer for the selected B design. */
.handbook{background:#f8f4e9;color:#302f29}.handbook .design{min-height:100vh}.handbook [hidden]{display:none!important}.handbook a:focus-visible,.handbook button:focus-visible,.handbook summary:focus-visible,.handbook input:focus-visible{outline:3px solid #b95130;outline-offset:4px}.skip-link{position:fixed;top:-100px;left:15px;padding:12px 20px;background:#302f29;color:#fff;z-index:100}.skip-link:focus{top:12px}.site-header{max-width:1280px;gap:22px}.site-header nav{gap:23px;margin-left:auto;align-items:center}.site-header nav a{font-size:12px;white-space:nowrap;padding:9px 0;color:#625c4e;border-bottom:1px solid transparent}.site-header nav a:hover,.site-header nav a[aria-current]{color:#b4472b;border-color:#b4472b}.site-search{display:flex;gap:7px;align-items:center;font-size:19px;color:#746952;padding:8px 0}.site-search span{font-size:11px}.site-search kbd{font-size:8px;border:1px solid #cdc6b4;border-radius:3px;padding:3px}.site-header .b-header-cta{white-space:nowrap;font-size:11px}.handbook .b-primary{width:max-content;max-width:100%}.handbook .text-button{display:inline-block}.handbook .b-hero{padding-top:57px;padding-bottom:50px}.handbook .b-hero h1{font-size:clamp(38px,4.3vw,60px)}.handbook .b-intro .eyebrow{color:#726b5b}.handbook .b-intro p,.handbook .b-caption{color:#746b5b}.handbook .b-section-head p{color:#766e5f}.b-lessons .lesson-group{position:relative;text-align:left;background:#f1e9d7;border:1px solid #ddd3be;padding:24px 26px}.b-lessons .lesson-group:nth-child(2){background:#e6eadc;border-color:#d0d8c4}.b-lessons .lesson-group:nth-child(3){background:#f3e3d9;border-color:#e4cfc1}.lesson-group h3{font:600 23px "Songti SC","STSong",serif;margin:33px 0 10px}.lesson-group p{font-size:12px;color:#716752;min-height:23px;margin-bottom:20px}.station-links{border-top:1px solid #b4a58555;padding-top:8px;display:grid;gap:4px}.station-links a{display:flex;align-items:center;gap:9px;padding:10px 0;font-size:12px;color:#504b3d}.station-links a:hover{color:#b9492b}.station-links span{font:10px Georgia,serif;color:#897b63}.station-links b{margin-left:auto;font-size:14px;font-weight:400}.handbook .b-notes{padding-top:48px;padding-bottom:43px}.home-reading{padding:30px 0 45px;border-top:1px solid #d9d0bd}.home-reading h2{font-family:"Songti SC","STSong",serif}.home-extra-cards{display:grid;grid-template-columns:1fr 1fr;gap:20px}.site-footer{padding:31px 0;color:#776e5d;align-items:center!important}.site-footer p{font-size:10px;margin:10px 0 0}.footer-links{display:flex;gap:20px;align-items:center;font-size:10px}.footer-links a:hover{color:#b74b2d}.site-footer .b-footer-title{font-size:20px;color:#5d5341}.article-card{display:flex;flex-direction:column;padding:25px 26px;border:1px solid #d9d1be;background:#fcf9f0;transition:transform .18s,background .18s}.article-card:hover{transform:translateY(-3px);background:#fffcf5}.card-kicker{display:flex;justify-content:space-between;align-items:center;font-size:10px;color:#947254}.card-kicker>span:last-child{font:10px Georgia,serif;letter-spacing:1px}.article-card h3{font:600 23px/1.5 "Songti SC","STSong",serif;margin:21px 0 12px}.article-card p{font-size:12px;color:#7a705e;flex:1}.card-foot{display:flex;justify-content:space-between;gap:10px;font-size:10px;color:#786b53;border-top:1px solid #e2daca;padding-top:16px;margin-top:10px}.library-main{max-width:1190px}.library-intro{padding:56px 0 31px}.library-intro .eyebrow{color:#926d52;font:10px Georgia,"PingFang SC",serif;letter-spacing:1px}.library-intro h1{font:600 47px/1.35 "Songti SC","STSong",serif;letter-spacing:-1px;margin:25px 0 20px}.library-intro p{font-size:13px;color:#7b705b}.library-tools{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:15px 0 23px;border-bottom:1px solid #d9d0bd;margin-bottom:25px}.category-filters{display:flex;gap:8px;flex-wrap:wrap}.category-filters button{font-size:12px;padding:9px 15px;border:1px solid #d8d0bf;border-radius:30px;white-space:nowrap}.category-filters button[aria-pressed=true]{color:#fff8e9;background:#bd5135;border-color:#bd5135}.category-filters button:hover{border-color:#ad6e4e}.library-tools>span{font-size:11px;white-space:nowrap;color:#867961}.article-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-bottom:55px}.article-grid .article-card h3{font-size:22px}.article-shell{max-width:1190px;padding:0 28px;margin:auto}.article-breadcrumb{display:flex;gap:12px;font-size:11px;color:#8b7b61;padding:29px 0}.article-breadcrumb a:hover{color:#b95130}.reading-layout{display:grid;grid-template-columns:minmax(0,760px) 235px;gap:75px;padding-bottom:50px}.reading-article{min-width:0}.article-title{border-bottom:1px solid #d9d0bd;padding:16px 0 27px}.article-title .eyebrow{color:#a05b3e;font-size:10px;font-weight:400;letter-spacing:1px}.article-title h1{font:600 43px/1.45 "Songti SC","STSong",serif;letter-spacing:-1px;margin:19px 0 20px;color:#353226;max-width:740px}.article-deck{font-size:15px;line-height:1.85;color:#81735d;margin-bottom:25px}.article-meta{display:flex;flex-wrap:wrap;gap:17px;color:#8c7c62;font-size:10px}.article-meta span+span{border-left:1px solid #cfc5b0;padding-left:17px}.lesson-goal{padding:21px 24px;margin:27px 0 32px;background:#e9eddc;border-left:3px solid #88986c}.lesson-goal>span{font-size:10px;color:#71805b;letter-spacing:1px}.lesson-goal p{font-size:14px;margin:9px 0 0;color:#4f6140}.reading-section{scroll-margin-top:28px;margin-bottom:35px}.reading-section h2{font:600 27px/1.6 "Songti SC","STSong",serif;letter-spacing:0;color:#3c382c;margin:0 0 17px;display:flex;gap:13px;align-items:baseline}.reading-section h2>span{font:13px Georgia,serif;color:#b37b52}.reading-section p,.reading-section li{font-size:15px;line-height:2;color:#685f4e}.reading-section p{margin-bottom:19px}.reading-section ol,.reading-section ul{padding-left:23px;margin:0 0 24px}.reading-section li{padding-left:4px;margin-bottom:11px}.reading-section strong{font-weight:600;color:#4c4737}.reading-section dl{display:grid;grid-template-columns:91px 1fr;border-top:1px solid #d7cdb7;margin:20px 0 27px}.reading-section dt,.reading-section dd{margin:0;padding:15px 0;border-bottom:1px solid #e3dbc9;line-height:1.85;font-size:14px}.reading-section dt{color:#9b583a;font-weight:500}.reading-section dd{color:#706550}.reading-section code{font-family:"SFMono-Regular",Consolas,monospace;font-size:12px;background:#eee5d2;padding:3px 6px;overflow-wrap:anywhere}.editor-note{background:#f0e5d3;border-left:3px solid #c88054;padding:19px 22px;margin:24px 0}.editor-note>strong{font-size:13px;color:#945231}.editor-note p{font-size:13px;line-height:1.9;margin:9px 0 0}.inline-link{color:#ae4d30;text-decoration:underline;text-underline-offset:5px}.reading-aside{padding-top:26px}.sticky-toc{position:sticky;top:30px}.reading-aside .section-index{font-size:9px;letter-spacing:1px;color:#95805b;font-weight:400}.reading-aside nav{display:grid;gap:3px;margin-top:15px;border-left:1px solid #d7ccb5;padding-left:16px}.reading-aside nav>a{display:block;font-size:11px;color:#7f725b;line-height:1.8;padding:7px 0}.reading-aside nav>a:hover{color:#b54e2c}.syllabus{display:grid;gap:4px;border-top:1px solid #d7ccb5;margin-top:28px;padding-top:23px}.syllabus>.section-index{margin-bottom:10px}.syllabus>a{font-size:11px;color:#7e7159;padding:9px 8px;line-height:1.5}.syllabus>a span{font:10px Georgia,serif;margin-right:9px}.syllabus>a[aria-current]{background:#eee1c8;color:#99472d;border-radius:3px}.aside-help{font-size:11px;display:block;color:#ac5639;margin-top:20px}.mobile-toc{display:none}.prompt-block{margin:23px 0 26px;border:1px solid #c8d0b4;background:#eef1e4}.prompt-head{display:flex;justify-content:space-between;align-items:center;padding:11px 17px;border-bottom:1px solid #d4dcc5;color:#778361;font-size:10px;gap:12px}.prompt-head button{font-size:10px;border:1px solid #b6c3a0;padding:6px 10px;border-radius:3px;color:#536944;background:#f9fcf1}.prompt-head button:hover{background:#dde7cb}.prompt-block pre{white-space:pre-wrap;overflow-wrap:anywhere;padding:22px;margin:0;font:13px/1.95 "PingFang SC","Microsoft YaHei",sans-serif;color:#4b5a3d}.reading-section figure{margin:25px 0}.reading-section img{max-width:100%;height:auto;display:block;border:1px solid #d5cbb4}.reading-section figcaption{font-size:10px;color:#8a7c62;line-height:1.8;margin-top:10px}.lesson-checks{padding:25px;background:#f2e9d7;border:1px solid #ddd0b5;margin:30px 0 20px}.lesson-checks>.section-index{color:#99794f;font-size:9px}.lesson-checks h2{font:600 25px "Songti SC",serif;margin:13px 0 21px;letter-spacing:0}.lesson-checks label{display:flex;align-items:flex-start;gap:11px;font-size:13px;line-height:1.8;color:#62553c;padding:8px 0;cursor:pointer}.lesson-checks input{margin:4px 0 0;accent-color:#9c6847;width:16px;height:16px;flex-shrink:0}.lesson-checks input:checked+span{color:#64734e;text-decoration:line-through}.lesson-checks>p{font-size:10px;color:#887960;margin:20px 0 0}.download-prompt{display:inline-block;color:#a25838;border-bottom:1px solid #b98d6d;font-size:12px;padding:9px 0;margin:0 0 17px}.article-sources{border-top:1px solid #d9d0bd;padding-top:23px;margin:20px 0 30px;scroll-margin-top:25px}.article-sources h2{font-size:17px;letter-spacing:0}.article-sources p,.article-sources li{font-size:11px;line-height:1.9;color:#8a7b60}.article-sources ul{padding-left:18px}.article-sources a{color:#a25a3b;text-decoration:underline;text-underline-offset:3px;overflow-wrap:anywhere}.article-pagination{display:grid;grid-template-columns:1fr 1fr;gap:15px;padding-top:10px}.article-pagination a{display:flex;flex-direction:column;gap:10px;background:#eee7d5;border:1px solid #d9cfb8;padding:18px 21px}.article-pagination a:last-child{text-align:right}.article-pagination a:hover{background:#e7ddc4}.article-pagination small{font-size:10px;color:#9b7754}.article-pagination strong{font:500 16px "Songti SC",serif;color:#554c39}#search-dialog{background:#faf6e9;border-color:#d2c8b1;border-radius:5px}#search-dialog::backdrop{background:#3933268c}.search-inner{padding:25px 32px 30px}.search-inner h2{font:600 28px "Songti SC",serif}.search-inner label{font-size:11px;color:#807052}.search-inner input{width:100%;padding:14px;border:1px solid #c4b699;background:#fffdf5;margin:12px 0 5px;font:14px "PingFang SC",sans-serif;color:#514630;border-radius:3px}.search-inner #search-status{font-size:11px;color:#917854;margin:13px 0}.search-inner .search-result{padding:16px 5px;border-color:#e1d7c3}.search-inner .search-result:hover{background:#f0e5d0}.search-result small{display:block;font-size:9px;color:#a37d54}.search-result strong{font:600 18px/1.7 "Songti SC",serif;display:block;margin:5px 0;color:#4e442f}.search-result>span{font-size:11px;line-height:1.8;color:#8e7d60}.handbook .reader-toolbar{background:#eee4cf;border-color:#d9caad}.handbook .reader-toolbar button{background:#e2d2b2;color:#766040}#site-toast{position:fixed;bottom:25px;left:50%;transform:translate(-50%,12px);background:#433a2b;color:#fff5e1;padding:13px 22px;border-radius:5px;font-size:12px;z-index:40;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;max-width:90vw;width:max-content;box-shadow:0 5px 22px #38250b20}#site-toast.visible{opacity:1;transform:translate(-50%,0)}
@media(max-width:1100px){.site-header{padding-left:28px;padding-right:28px;gap:18px}.site-header nav{gap:15px}.site-header .b-header-cta{display:none}.reading-layout{gap:37px;grid-template-columns:minmax(0,1fr) 210px}.article-title h1{font-size:38px}.article-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.lesson-group h3{font-size:21px}.b-lessons .lesson-group{padding:23px 20px}.station-links a{font-size:11px}}
@media(max-width:760px){.site-header{flex-wrap:wrap;padding:20px 22px 12px;gap:17px;align-items:center}.site-header nav{display:flex;width:100%;order:3;margin:0;justify-content:space-between;gap:10px;border-top:1px solid #e1d8c5;padding-top:9px}.site-header nav a{font-size:11px}.site-search{margin-left:auto}.site-search kbd{display:none}.handbook .b-hero{padding:33px 0 38px}.handbook .b-hero h1{font-size:41px}.handbook .b-caption{font-size:10px}.b-lessons .lesson-group{padding:24px}.lesson-group h3{font-size:25px;margin:23px 0 11px}.station-links a{font-size:13px;padding:12px 0}.home-extra-cards{grid-template-columns:1fr}.home-reading{padding-top:25px;padding-bottom:35px}.home-reading .section-heading{gap:5px}.article-card h3{font-size:23px}.site-footer{align-items:flex-start!important;gap:23px;padding-top:26px}.footer-links{flex-wrap:wrap;gap:17px}.article-shell{padding:0 23px}.article-breadcrumb{padding:23px 0;font-size:10px}.reading-layout{grid-template-columns:1fr;padding-bottom:35px;gap:0}.reading-aside{display:none}.article-title{padding-top:7px;padding-bottom:22px}.article-title h1{font-size:32px;margin-top:17px;line-height:1.5}.article-deck{font-size:13px}.article-meta{gap:10px;font-size:9px}.article-meta span+span{padding-left:10px}.lesson-goal{margin:24px 0;padding:19px}.lesson-goal p{font-size:13px}.mobile-toc{display:block;border:1px solid #d8ccb4;padding:14px 18px;margin-bottom:30px;font-size:12px;color:#91704c}.mobile-toc summary{cursor:pointer}.mobile-toc nav{display:grid;gap:14px;margin:19px 0 4px;font-size:12px;line-height:1.7;color:#7f6d4e}.reading-section h2{font-size:23px;gap:10px;line-height:1.6}.reading-section h2 span{font-size:11px}.reading-section p,.reading-section li{font-size:14px}.reading-section dl{grid-template-columns:70px 1fr}.reading-section dt,.reading-section dd{font-size:13px}.prompt-block pre{font-size:12px;padding:18px}.editor-note{padding:17px}.lesson-checks{padding:22px 19px}.lesson-checks label{font-size:12px}.article-pagination{gap:10px}.article-pagination a{padding:15px}.article-pagination strong{font-size:15px;line-height:1.5}.library-intro{padding:36px 0 20px}.library-intro h1{font-size:34px}.library-intro p{font-size:12px}.library-tools{align-items:flex-start;flex-direction:column;gap:14px;padding-top:8px}.category-filters{gap:7px}.category-filters button{padding:8px 12px;font-size:11px}.article-grid{grid-template-columns:1fr;gap:15px;margin-bottom:35px}.search-inner{padding:22px}.search-inner h2{font-size:25px}.search-result strong{font-size:17px}.article-sources p,.article-sources li{font-size:11px}}
@media(prefers-reduced-motion:reduce){#site-toast{transition:none}}
/* Static document navigation stays immediately readable. */
.handbook .design{animation:none}
.resource-actions{display:flex;flex-wrap:wrap;gap:16px 23px;margin:23px 0;line-height:1.9;font-size:13px}.evidence-pair{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}.evidence-pair figure{min-width:0}.evidence-table-wrap{overflow-x:auto;margin:22px 0}.evidence-table{width:100%;border-collapse:collapse;font-size:12px;line-height:1.9}.evidence-table th,.evidence-table td{padding:12px 15px;text-align:left;border:1px solid #d6ccb6;vertical-align:top}.evidence-table th{background:#eee3cc;color:#775936}.evidence-table td{color:#74644a}.evidence-table td:first-child{width:30%}@media(max-width:760px){.evidence-pair{gap:12px}.resource-actions{font-size:12px}.evidence-table th,.evidence-table td{padding:10px}.evidence-table{font-size:11px}}
.error-page{padding-top:90px;padding-bottom:110px;min-height:65vh}.error-page .eyebrow{color:#ab6b48}.error-page h1{font:600 64px/1.3 "Songti SC","STSong",serif;margin:25px 0;color:#4b4030}.error-page p{font-size:15px;color:#8a785c}.error-page .resource-actions{align-items:center;margin-top:30px}@media(max-width:760px){.error-page{padding-top:55px;padding-bottom:65px}.error-page h1{font-size:43px}.error-page p{font-size:13px}}
/* Locale controls and English editorial typography. */
.language-switch{font-size:12px;white-space:nowrap;color:#9b4b31;border:1px solid #d7c7ac;border-radius:4px;padding:7px 10px;line-height:1.4}
.language-switch:hover{background:#efe4d0}
html[lang=en] .handbook{font-family:Arial,Helvetica,sans-serif}
html[lang=en] .b-brand{font-size:19px}
html[lang=en] .b-hero h1,html[lang=en] .article-title h1,html[lang=en] .library-intro h1{font-family:Georgia,serif;letter-spacing:-1.4px;line-height:1.12}
html[lang=en] .b-hero h1 span{display:block}
html[lang=en] .article-title h1{font-size:44px;line-height:1.2}
html[lang=en] .reading-section h2,html[lang=en] .article-card h3,html[lang=en] .lesson-group h3{font-family:Georgia,serif;line-height:1.35}
html[lang=en] .reading-section dl{grid-template-columns:135px minmax(0,1fr);gap:0 18px}
html[lang=en] .reading-section dt,html[lang=en] .reading-section dd{overflow-wrap:break-word}
html[lang=en] .paper-title{font-family:Georgia,serif;font-size:37px}
html[lang=en] .paper-top{font-size:9px}
html[lang=en] .station-links a{line-height:1.6;align-items:baseline}
html[lang=en] .lesson-group p{line-height:1.7;min-height:42px}
@media(max-width:1100px){html[lang=en] .site-header{gap:13px}html[lang=en] .site-header nav{gap:14px}}
@media(max-width:760px){.site-header .language-switch{margin-left:auto}.site-header .site-search{margin-left:0}html[lang=en] .site-header{gap:12px}html[lang=en] .site-header .b-brand{font-size:17px}html[lang=en] .site-search span{display:none}html[lang=en] .b-hero h1{font-size:42px}html[lang=en] .article-title h1{font-size:33px}html[lang=en] .reading-section dl{grid-template-columns:95px minmax(0,1fr);gap:0 12px}html[lang=en] .b-caption{max-width:280px}html[lang=en] .library-intro h1{font-size:36px}html[lang=en] .site-header nav a{font-size:10px}}