/* Approved direction C: graphite/champagne. All module rules are scoped. */
body.vcb-page{margin:0;background:#f7f5f1;color:#25292b;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased;font-size:15px;line-height:1.6;--vcb-header:84px}body.vcb-page *{box-sizing:border-box}body.vcb-page .vcb-site-header{position:sticky;top:0;z-index:150;background:#fff;border-bottom:1px solid #e5e1da;min-height:64px}body.vcb-page .vcb-site-header .container-header{max-width:none;width:100%;padding:0 22px}body.vcb-page .vcb-site-header .navbar-collapse{display:flex;align-items:center;min-height:70px}body.vcb-page .vcb-site-header .cgn{width:100%}.vcb-skip{position:fixed;top:-100px;left:20px;background:#fff;padding:12px;z-index:1000}.vcb-skip:focus{top:10px}#vcb-root{isolation:isolate}#vcb-root :is(h1,h2,h3,p,ul){margin:0}#vcb-root :is(a,button,input,textarea,select){font:inherit}#vcb-root a{color:inherit;text-decoration:none}#vcb-root button{cursor:pointer;border:0}#vcb-root :is(a,button,input,textarea,select):focus-visible{outline:3px solid #9b7442;outline-offset:3px}#vcb-root [hidden]{display:none!important}#vcb-root svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linejoin:round;stroke-linecap:round;flex:none}#vcb-root .vcb-scrim{display:none}#vcb-root .vcb-shell{display:grid;grid-template-columns:244px minmax(0,1fr);min-height:calc(100vh - var(--vcb-header))}#vcb-root .vcb-sidebar{background:#272b2d;color:#f5f2ed;position:sticky;top:var(--vcb-header);height:calc(100vh - var(--vcb-header));overflow:auto;padding:30px 20px;scrollbar-width:thin;display:flex;flex-direction:column;gap:24px}#vcb-root .vcb-brand{display:flex;align-items:center;gap:12px;margin-bottom:6px}#vcb-root .vcb-brand>b{background:#45423c;color:#e4d1ad;width:44px;height:48px;border-radius:10px;display:grid;place-items:center}#vcb-root .vcb-brand strong{font-size:18px;line-height:1.4;display:block}#vcb-root .vcb-brand small{display:block;font-size:12px;color:#bfc1be;margin-top:5px}#vcb-root .vcb-nav-group{display:grid;gap:6px}#vcb-root .vcb-nav-group>p{font-size:12px;color:#b9bab6;margin:10px 10px 8px}#vcb-root .vcb-nav{position:relative;display:flex;align-items:center;gap:13px;padding:12px 14px;border-radius:7px;min-height:47px;color:#e1e3df;font-size:14px}#vcb-root .vcb-nav:hover{background:#373b3c}#vcb-root .vcb-nav[aria-current=page]{background:#4b463e;color:#fff}#vcb-root .vcb-nav[aria-current=page]:before{content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;background:#d9bc8b;border-radius:3px}#vcb-root .vcb-nav svg{width:21px;height:21px}#vcb-root .vcb-sidebar-foot{border-top:1px solid #424647;padding-top:15px;margin-top:auto}#vcb-root .vcb-main{min-width:0;padding:28px 30px 45px;max-width:1740px;width:100%;margin:auto}#vcb-root .vcb-mobilebar{display:none}#vcb-root .vcb-hero{min-height:304px;background:#eae5db url(library-hero.jpg) center center/cover no-repeat;border:1px solid #e7e0d3;border-radius:12px;display:flex;align-items:center;padding:40px 44px;overflow:hidden;position:relative}#vcb-root .vcb-hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(247,244,237,.6),rgba(247,244,237,.15) 60%,transparent)}#vcb-root .vcb-hero-copy{position:relative;max-width:660px}#vcb-root .vcb-eyebrow{color:#726044;font-size:13px;letter-spacing:.07em}#vcb-root .vcb-hero h1{font-family:"Noto Serif SC","Songti SC",SimSun,serif;font-size:clamp(28px,2.8vw,43px);line-height:1.45;letter-spacing:-.025em;margin:18px 0 10px;font-weight:700;text-wrap:balance}#vcb-root .vcb-hero p{color:#535855;font-size:16px;text-wrap:pretty;max-width:540px}#vcb-root .vcb-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}#vcb-root .vcb-button{background:#292d2d;color:#fff!important;border:1px solid #292d2d;border-radius:7px;display:inline-flex;gap:12px;align-items:center;justify-content:center;min-height:43px;padding:9px 20px;font-size:14px;font-weight:500;transition:background .16s,transform .16s}#vcb-root .vcb-button:hover{background:#44463f}#vcb-root .vcb-button:active{transform:scale(.98)}#vcb-root .vcb-button.secondary{background:rgba(255,255,255,.6);border:1px solid #aaa294;color:#303330!important}#vcb-root .vcb-button.small{min-height:38px;padding:7px 13px;font-size:13px}#vcb-root .vcb-section{margin-top:30px}#vcb-root .vcb-section-head{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:16px}#vcb-root .vcb-section-head>div{display:flex;align-items:baseline;gap:17px}#vcb-root h2{font-size:24px;line-height:1.45;font-weight:650;letter-spacing:-.02em}#vcb-root .vcb-section-head p{color:#686b68;font-size:13px}#vcb-root .vcb-text-link{font-size:13px;color:#6f5630;padding:8px 0;white-space:nowrap}#vcb-root .vcb-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}#vcb-root .vcb-topic{min-height:114px;display:flex;align-items:center;gap:17px;padding:22px;background:#fff;border:1px solid #e6e3de;border-radius:9px;box-shadow:0 2px 7px #272b2d03;transition:box-shadow .2s,transform .2s}#vcb-root .vcb-topic:hover{box-shadow:0 5px 18px #272b2d0a;transform:translateY(-2px)}#vcb-root .vcb-topic>i{display:grid;place-items:center;flex:none;width:48px;height:48px;background:#f7f4ef;color:#8b6336;border-radius:8px}#vcb-root .vcb-topic h3{font-size:17px;font-weight:600}#vcb-root .vcb-topic p{font-size:12px;color:#6b706e;margin-top:6px}#vcb-root .vcb-topic>span{margin-left:auto;color:#6e736f}#vcb-root .vcb-research-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:16px}#vcb-root .vcb-feature{min-height:195px;padding:28px;border-radius:10px;background:linear-gradient(90deg,#242521e6,#24252133),url(library-hero.jpg) center/cover;color:#fff;display:flex;flex-direction:column;align-items:flex-start;justify-content:center}#vcb-root .vcb-feature h3{font-family:"Songti SC",serif;font-size:25px}#vcb-root .vcb-feature p{font-size:13px;margin:8px 0 20px;color:#e0e1d9}#vcb-root .vcb-panel{min-width:0;background:#fff;border:1px solid #e6e3de;border-radius:10px;padding:24px}#vcb-root .vcb-panel h3{font-size:18px;font-weight:600}#vcb-root .vcb-muted{font-size:13px;color:#666c69;margin-top:7px}#vcb-root .vcb-mini-map{margin-top:20px;text-align:center;font-size:11px;color:#594e3d}#vcb-root .vcb-mini-map>span{display:inline-block;padding:4px 17px;background:#eee7dc;border:1px solid #d7c9b2;border-radius:5px}#vcb-root .vcb-mini-map>div{display:flex;gap:7px;margin-top:20px;position:relative}#vcb-root .vcb-mini-map>div:before{content:"";position:absolute;top:-11px;left:12%;right:12%;height:10px;border:1px solid #c9c1b5;border-bottom:0;border-radius:10px 10px 0 0}#vcb-root .vcb-mini-map i{flex:1;font-style:normal;background:#f7f6f3;padding:5px 0;border:1px solid #e5e0d7;border-radius:4px}#vcb-root .vcb-bars{display:flex;gap:12px;align-items:flex-end;height:90px;margin-top:16px}#vcb-root .vcb-bars i{height:var(--height);width:100%;background:#baa98d;border-radius:3px 3px 0 0}#vcb-root .vcb-page-heading{margin-bottom:24px}#vcb-root .vcb-page-heading h1{font-size:32px;line-height:1.4;letter-spacing:-.025em}#vcb-root .vcb-page-heading p{color:#626964;max-width:850px;margin-top:9px}#vcb-root .vcb-search{display:flex;gap:12px;margin:22px 0;align-items:center;flex-wrap:wrap}#vcb-root .vcb-search label{flex:1;min-width:180px}#vcb-root .vcb-search input{width:100%;min-height:46px;padding:10px 15px;background:#fff;border:1px solid #d8d6cf;border-radius:7px;color:#25292b}#vcb-root .vcb-search select{min-height:46px;padding:8px 12px;background:#fff;border:1px solid #d8d6cf;border-radius:7px;max-width:100%}#vcb-root .vcb-results{font-size:13px;color:#656a66;margin-bottom:14px}#vcb-root .vcb-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}#vcb-root .vcb-card{display:flex;flex-direction:column;align-items:stretch;gap:12px;padding:23px;background:#fff;border:1px solid #e6e3de;border-radius:10px;min-width:0}#vcb-root .vcb-card h3{font-size:18px;line-height:1.6;overflow-wrap:anywhere}#vcb-root .vcb-card>p{font-size:14px;color:#5f6861;line-height:1.8;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}#vcb-root .vcb-meta{font-size:12px;color:#766951;display:flex;flex-wrap:wrap;gap:8px}#vcb-root .vcb-card-foot{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-top:auto;padding-top:8px}#vcb-root .vcb-save{background:#f7f5f0;color:#695c46;min-width:44px;min-height:40px;border-radius:6px;padding:6px 10px;font-size:13px}#vcb-root .vcb-save[aria-pressed=true]{background:#e8dfd0;color:#3e3425}#vcb-root .vcb-empty{background:#fff;padding:40px 25px;border:1px solid #e3dfd6;border-radius:10px;text-align:center;grid-column:1/-1}#vcb-root .vcb-empty p{margin:10px 0 20px;color:#68706a}#vcb-root .vcb-pager{display:flex;justify-content:center;gap:15px;align-items:center;margin:24px 0}#vcb-root .vcb-pager button:disabled{opacity:.4;cursor:default}#vcb-root .vcb-breadcrumb{font-size:13px;color:#6d6f65;margin-bottom:18px;display:flex;gap:10px;flex-wrap:wrap}#vcb-root .vcb-reader-layout{display:grid;grid-template-columns:minmax(0,1fr) 210px;gap:24px;align-items:start}#vcb-root .vcb-reader{padding:30px 38px;background:#fff;border:1px solid #e3e0da;border-radius:10px;min-width:0}#vcb-root .vcb-reader header{padding-bottom:23px;border-bottom:1px solid #e9e5dd;margin-bottom:26px}#vcb-root .vcb-reader h1{font-size:29px;line-height:1.55;margin:10px 0 12px;overflow-wrap:anywhere}#vcb-root .vcb-reader-controls{display:flex;flex-wrap:wrap;gap:8px;margin-top:15px}#vcb-root .vcb-prose{line-height:1.95;font-size:16px;color:#343b36;overflow-wrap:anywhere}#vcb-root .vcb-prose :is(h1,h2,h3,h4,h5,h6){margin:30px 0 12px;scroll-margin-top:calc(var(--vcb-header) + 16px);line-height:1.65}#vcb-root .vcb-prose h1{font-size:25px}#vcb-root .vcb-prose h2{font-size:23px}#vcb-root .vcb-prose h3{font-size:19px}#vcb-root .vcb-prose :is(p,ul,ol,blockquote,pre,table){margin:16px 0}#vcb-root .vcb-prose :is(ul,ol){padding-left:25px}#vcb-root .vcb-prose li{margin:6px 0}#vcb-root .vcb-prose blockquote{margin-inline:0;border-left:3px solid #bdab8c;padding:3px 18px;background:#f8f6f2;color:#586158}#vcb-root .vcb-prose a{color:#735627;text-decoration:underline;text-underline-offset:3px}#vcb-root .vcb-prose pre{padding:15px;background:#f4f3ee;overflow:auto;border-radius:7px;font-size:13px;line-height:1.65}#vcb-root .vcb-prose table{display:block;max-width:100%;overflow:auto;border-collapse:collapse;font-size:14px}#vcb-root .vcb-prose :is(th,td){padding:10px 12px;border:1px solid #dfdfd7;text-align:left;min-width:110px}#vcb-root .vcb-prose th{background:#f5f3ed}#vcb-root .vcb-prose hr{border:0;border-top:1px solid #e8e5dc;margin:25px 0}#vcb-root .vcb-toc{position:sticky;top:calc(var(--vcb-header) + 20px);max-height:calc(100vh - var(--vcb-header) - 50px);overflow:auto;background:#efede7;border:1px solid #e1ddd4;border-radius:8px;padding:18px;font-size:13px}#vcb-root .vcb-toc a{display:block;margin:11px 0;line-height:1.6;color:#5a6059}#vcb-root details{border-top:1px solid #e5e0d6;margin-top:25px;padding-top:16px}#vcb-root summary{cursor:pointer;color:#746143;font-size:13px;min-height:30px}#vcb-root .vcb-source{font-size:13px;line-height:1.9;color:#626960;overflow-wrap:anywhere}#vcb-root .vcb-source a{text-decoration:underline}#vcb-root .vcb-notes{margin-top:26px}#vcb-root .vcb-notes textarea{display:block;width:100%;min-height:140px;border:1px solid #d5d4cb;border-radius:7px;padding:15px;resize:vertical;background:#fbfaf7;margin:12px 0;color:#343b36}#vcb-root .vcb-note-status{font-size:13px;color:#686653;min-height:24px;margin-top:8px}#vcb-root .vcb-related{margin-top:30px}#vcb-root .vcb-coverage{display:grid;gap:16px;margin-top:20px}#vcb-root .vcb-bar-row{display:grid;grid-template-columns:150px minmax(0,1fr) 75px;align-items:center;gap:14px;font-size:14px}#vcb-root .vcb-bar-track{height:17px;background:#f1eee7;border-radius:3px;overflow:hidden}#vcb-root .vcb-bar-track>i{height:100%;width:var(--width);background:#a38c67;display:block}#vcb-root .vcb-map-toolbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:16px}#vcb-root .vcb-map-window{overflow:auto;background:#fff;border:1px solid #e4dfd4;border-radius:10px;min-height:320px;padding:25px}#vcb-root .vcb-map{display:grid;grid-template-columns:190px minmax(0,1fr);gap:35px;transform-origin:top left;align-items:start}#vcb-root .vcb-map-root{background:#2b3030;color:#fff;padding:18px;border-radius:8px;margin-top:70px;text-align:center}#vcb-root .vcb-map-branches{display:grid;gap:14px;min-width:440px}#vcb-root .vcb-map-branch{border-left:2px solid #c7b79b;padding-left:20px;position:relative}#vcb-root .vcb-map-branch:before{content:"";position:absolute;left:-21px;top:20px;width:20px;border-top:1px solid #c7b79b}#vcb-root .vcb-map-branch button{background:#eee7db;padding:10px 15px;border-radius:6px;min-height:43px;text-align:left;color:#423e34}#vcb-root .vcb-map-children{display:grid;gap:7px;margin:9px 0 3px;padding-left:15px}#vcb-root .vcb-map-children a{padding:6px 12px;border:1px solid #e6e1d6;border-radius:5px;display:block;background:#faf9f6;font-size:13px}#vcb-root .vcb-foot{color:#73766c;font-size:12px;margin-top:36px;padding-top:18px;border-top:1px solid #e5e0d7;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}.vcb-initial,.vcb-nojs{padding:50px}.vcb-site-header a:focus-visible{outline:2px solid #9b7442;outline-offset:3px}#vcb-root .vcb-toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);padding:12px 20px;max-width:90vw;background:#272c2b;color:#fff;border-radius:8px;z-index:999;box-shadow:0 6px 24px #0002;text-align:center;font-size:14px}#vcb-root .vcb-storage-error{padding:12px 16px;background:#fff2dc;color:#744e1b;margin-bottom:18px;border-radius:7px;font-size:13px}
@media(min-width:1700px){#vcb-root .vcb-main{padding-inline:42px}#vcb-root .vcb-hero{min-height:345px}}
@media(max-width:1250px){#vcb-root .vcb-shell{grid-template-columns:220px minmax(0,1fr)}#vcb-root .vcb-sidebar{padding-inline:14px}#vcb-root .vcb-main{padding:24px}#vcb-root .vcb-hero{padding:30px;min-height:280px}#vcb-root .vcb-grid{grid-template-columns:repeat(2,minmax(0,1fr))}#vcb-root .vcb-research-grid{grid-template-columns:1fr 1fr}#vcb-root .vcb-feature{grid-column:1/-1;min-height:185px}#vcb-root .vcb-reader-layout{grid-template-columns:minmax(0,1fr)}#vcb-root .vcb-toc{position:static;grid-row:1;max-height:180px}#vcb-root .vcb-reader{padding:28px}}
@media(max-width:850px){#vcb-root .vcb-shell{display:block}#vcb-root .vcb-mobilebar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}#vcb-root .vcb-mobilebar button{background:#2b3030;color:#fff;border-radius:6px;padding:8px 13px;min-height:42px}#vcb-root .vcb-mobilebar strong{font-size:16px}#vcb-root .vcb-sidebar{position:fixed;top:var(--vcb-header);bottom:0;left:0;width:270px;height:calc(100dvh - var(--vcb-header));z-index:180;transform:translateX(-100%);transition:transform .2s;visibility:hidden}#vcb-root .vcb-sidebar.open{transform:translateX(0);visibility:visible}#vcb-root .vcb-scrim.open{display:block;position:fixed;inset:var(--vcb-header) 0 0;background:#0007;z-index:170}#vcb-root .vcb-scrim{display:none}#vcb-root .vcb-list{grid-template-columns:repeat(2,minmax(0,1fr))}#vcb-root .vcb-main{padding:20px}#vcb-root .vcb-hero{min-height:265px}#vcb-root .vcb-hero:before{background:linear-gradient(90deg,#f4f0e8ed,#f4f0e8bd 65%,#f4f0e840)}#vcb-root .vcb-hero-copy{max-width:85%}}
@media(max-width:560px){body.vcb-page{font-size:14px}body.vcb-page .vcb-site-header .container-header{padding:0 12px}#vcb-root .vcb-main{padding:16px}#vcb-root .vcb-hero{padding:25px 22px;min-height:282px;background-position:65% center}#vcb-root .vcb-hero-copy{max-width:100%}#vcb-root .vcb-hero h1{font-size:29px;max-width:270px}#vcb-root .vcb-hero p{font-size:14px;max-width:260px}#vcb-root .vcb-actions{gap:8px;margin-top:20px}#vcb-root .vcb-button{padding:9px 12px;font-size:13px}#vcb-root .vcb-grid,#vcb-root .vcb-list,#vcb-root .vcb-research-grid{grid-template-columns:1fr}#vcb-root .vcb-topic{min-height:100px;padding:18px}#vcb-root .vcb-section{margin-top:25px}#vcb-root .vcb-section-head>div{display:block}#vcb-root .vcb-section-head p{margin-top:4px}#vcb-root h2{font-size:22px}#vcb-root .vcb-page-heading h1{font-size:28px}#vcb-root .vcb-reader{padding:22px 18px}#vcb-root .vcb-reader h1{font-size:24px}#vcb-root .vcb-prose{font-size:15px}#vcb-root .vcb-prose h2{font-size:21px}#vcb-root .vcb-bar-row{grid-template-columns:105px minmax(0,1fr) 52px;gap:8px;font-size:12px}#vcb-root .vcb-panel{padding:20px}#vcb-root .vcb-map{grid-template-columns:120px 1fr;gap:25px}#vcb-root .vcb-map-root{font-size:13px;padding:15px 8px}#vcb-root .vcb-map-branches{min-width:260px}#vcb-root .vcb-search{gap:10px}#vcb-root .vcb-search select{flex:1;min-width:130px}#vcb-root .vcb-search label{flex-basis:100%}#vcb-root .vcb-feature{min-height:200px}#vcb-root .vcb-toast{bottom:18px}#vcb-root .vcb-foot{margin-bottom:30px}}
@media(prefers-reduced-motion:reduce){#vcb-root *,#vcb-root *:before{transition:none!important;scroll-behavior:auto!important}}
#vcb-root .vcb-sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}#vcb-root .vcb-mobile-close{display:none}@media(max-width:850px){#vcb-root .vcb-mobile-close{display:block}}

/* Keep the original public utilities in normal footer flow on this page. */
body.vcb-page #vcb-root .vcb-shell{background:#f7f5f1}
body.vcb-page .zmt-contact-floating{display:none!important}
body.vcb-page .guide-shell__launcher[aria-expanded=false]{position:static!important;inset:auto!important;transform:none!important;display:block!important;margin:24px auto 16px!important}
body.vcb-page .float-right.position-bottom{position:static!important;inset:auto!important;transform:none!important;display:flex!important;justify-content:center;gap:8px;width:auto!important;margin:0 auto 24px!important;opacity:1!important;visibility:visible!important}