:where(a.route-link){text-decoration:none;display:inline-block;text-align:center;line-height:inherit}.route-link{color:inherit}

:root{color-scheme:light;--luban-type-page:24px;--luban-type-section:18px;--luban-type-heading:16px;--luban-type-body:14px;--luban-type-meta:12px;--luban-type-leading:1.5;--ink:#20252b;--muted:#515c69;--bg:#fff;--layer:#f5f6f8;--line:#d8dde1;--control:#7b8793;--accent:#b32237;--selected:#faeef0;--code:#f5f6f8;--shell:#f8f9fb}
*{box-sizing:border-box}body{margin:0;font:var(--luban-type-body)/var(--luban-type-leading) 'Microsoft YaHei',system-ui,sans-serif;background:var(--shell);color:var(--ink)}:is(button,a):where(button,.route-link),input,a{font:inherit}:is(button,a):where(button,.route-link),a{-webkit-tap-highlight-color:transparent}:is(button,a):where(button,.route-link){cursor:pointer;color:inherit}:is(button,a):where(button,.route-link):disabled{cursor:default;opacity:.5}a{color:var(--accent);text-underline-offset:3px}:is(button,a):where(button,.route-link):focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px}:is(button,a):where(button,.route-link){border:1px solid var(--control);background:var(--bg);border-radius:8px;min-height:36px;padding:8px 16px;font-weight:500}.primary{background:var(--accent);color:var(--bg);border-color:var(--accent)}.quiet{border-color:transparent;background:transparent}.quiet:hover{background:var(--layer)}h1{font-size:var(--luban-type-page);line-height:1.5;font-weight:600;margin:0 0 12px}h2{font-size:var(--luban-type-section);font-weight:600;margin:0 0 16px}h3{font-size:var(--luban-type-heading);font-weight:600;margin:0 0 8px}p{margin:0 0 12px}strong{font-weight:600}.muted,.meta{color:var(--muted)}.meta{font-size:var(--luban-type-meta)}.topbar{height:64px;border-bottom:1px solid var(--line);background:var(--bg);display:flex;align-items:center;justify-content:space-between;padding:0 24px;gap:24px;position:sticky;top:0;z-index:5}.brand{font-weight:600;font-size:16px;display:flex;align-items:center;gap:16px}.brand-logo{display:block;line-height:0;flex:none}.brand-logo img{display:block;width:166px;height:auto}.brand span{font-weight:400;font-size:14px;color:var(--muted);padding-left:16px;border-left:1px solid var(--line)}.top-actions{display:flex;gap:8px;align-items:center}.app{display:grid;grid-template-columns:256px minmax(0,1fr);min-height:calc(100vh - 64px)}.sidebar{border-right:1px solid var(--line);background:var(--bg);padding:24px 16px;position:sticky;top:64px;height:calc(100vh - 64px);overflow:auto}.nav-label{margin:0 8px 12px;color:var(--muted);font-size:12px}.chapter-button{border:0;display:flex;width:100%;gap:12px;align-items:flex-start;text-align:left;background:transparent;border-radius:8px;padding:12px 8px;margin-bottom:4px;font-weight:400}.chapter-button:hover{background:var(--layer)}.chapter-button.active{background:var(--selected);color:var(--accent);font-weight:500}.chapter-number{font-size:12px;line-height:21px;font-variant-numeric:tabular-nums;min-width:20px}.side-meta{padding:16px 8px 0;border-top:1px solid var(--line);margin-top:24px}.content{min-width:0;padding:32px;max-width:1180px;width:100%;margin:auto}.welcome{display:grid;grid-template-columns:minmax(0,1fr) 168px;align-items:center;gap:32px;padding-bottom:32px;border-bottom:1px solid var(--line)}.welcome-copy{max-width:640px}.eyebrow{color:var(--accent);font-size:12px;letter-spacing:.06em;margin-bottom:12px}.welcome img{width:168px;height:auto;display:block}.action-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:24px}.section-heading{display:flex;align-items:center;justify-content:space-between;margin:32px 0 16px;gap:16px}.section-heading h2{margin:0}.directory{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 32px}.chapter-entry{padding:24px 0;border-bottom:1px solid var(--line);min-width:0}.chapter-entry .entry-title{border:0;background:transparent;border-radius:0;padding:0;min-height:0;display:flex;text-align:left;align-items:baseline;gap:12px;font-size:18px;font-weight:600}.entry-title:hover{color:var(--accent)}.entry-title span{font-size:12px;font-weight:400;color:var(--muted);min-width:20px}.entry-summary{margin:8px 0 12px 32px;color:var(--muted)}.entry-topics{margin:0 0 0 32px;padding:0;list-style:none}.entry-topics li{margin:4px 0}.entry-topics a{color:var(--ink);font-size:14px}.entry-topics a:hover{color:var(--accent)}.scope-note{margin-top:32px;padding-top:24px;border-top:1px solid var(--line);max-width:840px}.breadcrumb{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:16px;color:var(--muted);font-size:12px}.breadcrumb :is(button,a):where(button,.route-link){padding:0;min-height:0;font-size:12px;border:0;border-radius:0;color:var(--muted);background:transparent}.chapter-index{margin:24px 0 0;padding:0;list-style:none}.chapter-index li{border-top:1px solid var(--line)}.topic-link{display:flex;justify-content:space-between;gap:16px;align-items:center;text-decoration:none;color:var(--ink);padding:16px 0}.topic-link:hover{color:var(--accent)}.topic-link span:last-child{color:var(--muted);font-size:12px;white-space:nowrap}.article{max-width:880px}.article-title{margin-bottom:24px}.article-title .meta{margin-bottom:8px}.subtitle{color:var(--muted);max-width:760px}.keypoints{margin:24px 0;display:grid;gap:16px;max-width:800px}.point{border-left:2px solid var(--line);padding-left:16px}.point h3{margin-bottom:4px}.point p{margin:0}.screen{margin:24px 0 32px;max-width:100%;padding:0}.screen img{display:block;max-width:100%;height:auto;width:auto;border:1px solid var(--line);border-radius:8px;background:#fff}.screen figcaption{font-size:12px;color:var(--muted);margin-top:12px}.screen a{display:inline-block;max-width:100%}.comic{max-width:760px;margin:32px 0}.comic-heading{display:flex;align-items:baseline;gap:12px;margin-bottom:16px}.comic-heading h2{margin:0}.comic a{display:block;cursor:zoom-in}.comic img{display:block;width:100%;height:auto}.detail{max-width:760px;margin-top:32px;padding-top:24px;border-top:1px solid var(--line)}.detail p,.detail li{line-height:1.8;overflow-wrap:anywhere;word-break:normal}.detail p{margin:0 0 16px}.detail p:last-child{margin-bottom:0}.detail-block+.detail-block{margin-top:32px}.detail-block h3{margin:0 0 12px}.detail-list{margin:16px 0 0;padding-left:24px}.detail-list li+li{margin-top:8px}.detail-example{margin-top:24px;padding-left:16px;border-left:2px solid var(--line)}.detail-example h4{margin:0 0 8px;font-size:var(--luban-type-body);line-height:var(--luban-type-leading);font-weight:600}.detail .detail-takeaway{margin:24px 0 0}.detail-takeaway strong{color:var(--accent);margin-right:4px}.prompt{background:var(--code);border:1px solid var(--line);border-radius:12px;padding:24px;margin:32px 0}.prompt-head{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:16px}.prompt-head h2{margin:0}.prompt-text{white-space:pre-wrap;overflow-wrap:anywhere;font:14px/1.8 'Microsoft YaHei',system-ui,sans-serif;margin:0;user-select:text}.copy-status{min-height:18px;color:var(--muted);font-size:12px;margin-top:8px}.note{color:var(--muted);margin-top:16px;line-height:1.7}.table-wrap{overflow-x:auto;margin:24px 0}table{width:100%;border-collapse:collapse;font-size:14px}th,td{text-align:left;border-bottom:1px solid var(--line);padding:16px 12px;vertical-align:top;overflow-wrap:anywhere}th{font-weight:600;background:var(--layer)}th:first-child,td:first-child{padding-left:0}th:first-child{padding-left:0}.sources{margin-top:32px;border-top:1px solid var(--line);padding-top:16px;color:var(--muted);font-size:12px}.sources summary{cursor:pointer;width:fit-content}.sources ul{padding-left:20px}.sources li{margin:8px 0;overflow-wrap:anywhere}.pager{display:flex;justify-content:space-between;gap:16px;border-top:1px solid var(--line);margin-top:32px;padding-top:24px}.pager :is(button,a):where(button,.route-link){max-width:48%;text-align:left}.searchbox{display:flex;gap:8px;margin:24px 0;max-width:640px}.searchbox input{min-width:0;flex:1;height:40px;background:var(--bg);border:1px solid var(--control);border-radius:8px;color:var(--ink);padding:8px 12px}.searchbox label{position:absolute;clip:rect(0 0 0 0);width:1px;height:1px;overflow:hidden}.empty{padding:32px 0;color:var(--muted)}.mobile-nav{display:none}.skip{position:absolute;top:-100px;left:16px;z-index:20;background:var(--bg);padding:8px}.skip:focus{top:8px}.footer-note{margin-top:40px;font-size:12px;color:var(--muted)}[hidden]{display:none!important}
@media(max-width:1000px){.app{grid-template-columns:220px minmax(0,1fr)}.content{padding:24px}.directory{grid-template-columns:1fr}.welcome{grid-template-columns:minmax(0,1fr) 120px;gap:24px}.welcome img{width:120px}}
@media(max-width:720px){.topbar{padding:0 16px;height:auto;min-height:64px;flex-wrap:wrap;gap:8px;padding-top:12px;padding-bottom:12px}.brand-logo img{width:142px}.brand span{display:none}.app{display:block}.sidebar{position:static;display:none;height:auto;border-right:0;border-bottom:1px solid var(--line)}.sidebar.open{display:block}.content{padding:24px 16px}.mobile-nav{display:inline-block}.welcome{grid-template-columns:1fr}.welcome img{display:none}.pager :is(button,a):where(button,.route-link){padding:8px;font-size:12px}.top-actions .meta{display:none}.prompt{padding:16px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
@media print{.topbar,.sidebar,.pager,.copy-status,.prompt-head :is(button,a):where(button,.route-link){display:none}.app{display:block}.content{padding:0}.prompt,.point,.screen{break-inside:avoid}body{background:white;color:black}}