:root{--ink:#193545;--muted:#586975;--line:#dce3e7;--blue:#175a7c;--paper:#fff;--wash:#f3f6f8;--active:#e0ecf2;--field:#bfcbd1;--hover:#087889;color-scheme:light}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.8 system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif}a{color:var(--blue);text-underline-offset:4px}button,input,select{font:inherit}button,select{cursor:pointer}button{border:1px solid var(--line);border-radius:5px;background:var(--paper);color:var(--ink);padding:6px 12px}button:hover,a:hover{color:var(--hover)}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #e6a43d;outline-offset:3px}.skip{position:absolute;top:-90px}.skip:focus{top:5px;z-index:20;background:var(--paper);padding:12px}header{height:90px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 4vw;background:var(--paper);position:sticky;top:0;z-index:5}.brand{display:flex;gap:15px;align-items:center;text-decoration:none;font-weight:700;font-size:18px}.mark{background:var(--ink);color:white;padding:8px 10px;font-size:14px}.brand small{display:block;font-size:12px;letter-spacing:3px;color:var(--muted);font-weight:400}header nav{display:flex;gap:18px;align-items:center;font-size:14px}#menu{display:none}.layout{max-width:1480px;margin:auto;display:grid;grid-template-columns:290px minmax(0,1fr)}aside{height:calc(100vh - 90px);position:sticky;top:90px;overflow-y:auto;border-right:1px solid var(--line);padding:28px 22px;background:var(--wash)}label{display:block;font-size:14px;font-weight:600}kbd{float:right;color:var(--muted)}input[type="search"],select{width:100%;min-width:0;border:1px solid var(--field);border-radius:4px;background:var(--paper);color:var(--ink);padding:9px;margin:7px 0 15px}input[type="search"]{font-size:16px}.selects{display:grid;grid-template-columns:1fr 1fr;gap:10px}select{font-size:14px}.hint,.credit{font-size:13px;color:var(--muted)}.hint{margin-top:0}#reset{font-size:14px}details{border-top:1px solid var(--line);margin-top:18px;padding-top:12px}summary{font-weight:650;cursor:pointer;font-size:14px}#directory a{display:block;text-decoration:none;font-size:14px;line-height:1.65;margin:5px 0;padding:8px;border-left:3px solid transparent}#directory a.active{background:var(--active);border-color:var(--blue);font-weight:650}.method{font-size:13px;display:block;margin-top:30px}main{min-width:0;padding:42px clamp(24px,5vw,76px)}.eyebrow{font-size:13px;letter-spacing:2px;color:var(--blue)}h1{font-family:"Songti SC","Noto Serif CJK SC",serif;font-size:clamp(26px,3vw,40px);line-height:1.5;letter-spacing:1px;margin:12px 0 18px}.intro p{max-width:680px}.quick{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0}.quick a{border:1px solid var(--line);padding:8px 16px;border-radius:4px;text-decoration:none;font-size:14px}.quick a:first-child{color:white;background:var(--ink);border-color:var(--ink)}.credit{padding-bottom:22px;border-bottom:1px solid var(--line)}.reading-bar{display:flex;justify-content:space-between;gap:12px;align-items:center;color:var(--muted);font-size:14px;margin:22px 0}.reading-bar button{font-size:13px}article{margin:25px 0 46px;overflow-wrap:anywhere}article h1{font-size:28px}article h2{font-size:22px;line-height:1.6;margin-top:35px;padding-top:15px;border-top:1px solid var(--line)}article h3{font-size:18px}article p,article li{line-height:1.95}article ul,article ol{padding-left:26px}article blockquote{margin:20px 0;padding:3px 20px;border-left:3px solid #82a8bb;background:var(--wash)}article pre{overflow-x:auto;background:var(--wash);padding:16px}article table{border-collapse:collapse;width:100%;font-size:14px;display:block;overflow-x:auto}article th,article td{padding:9px 14px;border:1px solid var(--line);text-align:left}article th{background:var(--wash)}article hr{border:0;border-top:1px solid var(--line);margin:25px 0}.source{font-size:13px}.result{border-bottom:1px solid var(--line);padding:24px 0}.result h2{margin:8px 0;font-size:21px}.result p{color:var(--muted);font-size:15px}.badge{font-size:12px;border:1px solid var(--line);padding:3px 7px;margin-right:7px}.empty{background:var(--wash);padding:30px}.toc{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:14px;padding:16px 0;border-bottom:1px solid var(--line)}footer{font-size:13px;color:var(--muted);border-top:1px solid var(--line);padding:25px 0}h1,h2,h3,section{scroll-margin-top:110px}@media(max-width:800px){header{height:76px;padding:0 16px}.brand{font-size:16px}.brand small{letter-spacing:1px}.mark{display:none}header nav{gap:10px}#menu{display:block;font-size:13px}.layout{display:block}aside{display:none;position:relative;top:0;height:auto;border-right:0;border-bottom:1px solid var(--line)}aside.open{display:block}main{padding:24px 18px}.reading-bar{align-items:flex-start}article h1{font-size:25px}article h2{font-size:21px}.quick a{padding:8px 10px}.credit{font-size:13px}}@media print{header,aside,.intro,.reading-bar,.toc,footer,.source,.skip{display:none!important}.layout{display:block}main{padding:0}article{font-size:11pt}a{color:inherit}article table{display:table}}

/* Task checkboxes must never inherit search-field dimensions. */
article .task-item{list-style:none;position:relative;padding-left:1.65em;margin:.45em 0}article ul:has(> .task-item){padding-left:0}article .task-item>p{margin:.45em 0}article input[type="checkbox"]{position:absolute;left:0;top:.48em;display:inline-block;width:1em;height:1em;min-width:0;margin:0;padding:0;accent-color:var(--blue);cursor:default}#content:focus:not(:focus-visible){outline:none}@media print{article input[type="checkbox"]{appearance:auto;opacity:1}}

.reader-notice{font-size:14px;line-height:1.8;background:var(--wash);border-left:3px solid #82a8bb;padding:12px 16px;margin:20px 0;overflow-wrap:anywhere}.reader-notice a{margin-left:.4em}@media print{.reader-notice{font-size:9pt;border:1px solid #bbb;background:var(--paper);break-inside:avoid}}

:root[data-theme="dark"]{--ink:#e0e9ef;--muted:#a9bac6;--line:#354653;--blue:#8ecde9;--paper:#131e27;--wash:#1c2a35;--active:#294453;--field:#536977;--hover:#b4e4f5;color-scheme:dark}
:root[data-theme="dark"] .mark,:root[data-theme="dark"] .quick a:first-child{background:#8ecde9;color:#131e27;border-color:#8ecde9}
#theme-toggle{white-space:nowrap;font-size:13px}
@media(max-width:480px){header nav{gap:6px}header nav>a{display:none}.brand{font-size:14px}.brand small{font-size:11px}#theme-toggle,#menu{padding:6px 8px;font-size:12px}}
@media print{:root,:root[data-theme="dark"]{--ink:#193545;--muted:#586975;--line:#dce3e7;--blue:#175a7c;--paper:#fff;--wash:#f3f6f8;color-scheme:light}}

.home-link{display:block;margin-top:20px;font-weight:650;font-size:14px}

[hidden]{display:none!important}.topic{margin-top:10px;padding-top:8px}.topic summary{font-size:13px;color:var(--muted)}.back-search{display:inline-block;margin:8px 0;font-size:14px}@media print{.back-search{display:none}}

/* Editorial labels describe use, not a blanket evidence rating. */
article .content-nature{border:1px solid var(--line);border-left:5px solid var(--blue);border-radius:5px;padding:10px 18px;background:var(--wash);font-size:15px}
article .nature-practice{border-left-style:dashed;border-left-color:#95723b}article .nature-decision{border-left-color:#56836a}article .nature-consultation{border-left-color:#866a9c}
.reading-mode{display:inline-block;margin-left:10px;padding:2px 8px;border:1px dashed var(--field);border-radius:4px;font-size:12px;color:var(--muted)}
:root[data-theme="dark"] article .nature-practice{border-left-color:#d2ad70}:root[data-theme="dark"] article .nature-decision{border-left-color:#8bb8a0}:root[data-theme="dark"] article .nature-consultation{border-left-color:#bea4d4}

article .practice-advice{border-left:3px dashed #95723b;padding:8px 14px;background:var(--wash);font-size:15px}:root[data-theme="dark"] article .practice-advice{border-left-color:#d2ad70}

.advanced-filters{margin:1rem 0}.advanced-filters summary{cursor:pointer}.event-suggestions{padding:1rem;border:1px solid currentColor;margin-bottom:1rem}.event-suggestions a{display:block;margin:.6rem 0}

.wide-table-scroll{max-width:100%;overflow-x:auto}.wide-table-scroll:focus-visible{outline:3px solid #e6a43d;outline-offset:3px}.wide-table-scroll table{display:table}.wide-table-hint{display:none}@media screen and (max-width:600px){.wide-table-scroll table{min-width:36rem}.wide-table-hint{display:block;font-size:13px;color:var(--muted)}}@media print{.wide-table-scroll{overflow:visible}.wide-table-hint{display:none}}

/* Local reading indexes; controls stay out of printed chapters. */
.bookmark-button{font-size:13px;min-height:44px;margin:0 0 8px}.bookmark-button[aria-pressed="true"]{background:var(--active);border-color:var(--blue)}
.saved-item{padding:20px 0;border-bottom:1px solid var(--line);overflow-wrap:anywhere}.saved-item h2{font-size:21px;line-height:1.6;margin:8px 0}.saved-item button{min-height:44px}.saved-location{font-size:13px;color:var(--muted)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
@media print{.bookmark-button,.saved-item button,#bookmark-notice,#bookmark-message{display:none!important}}

/* Reader utilities reuse the site's palette and stay out of the reading flow. */
.reader-tools{padding:14px 16px;border:1px solid var(--line);background:var(--wash);margin:16px 0;overflow-wrap:anywhere}
.reader-tools small{display:block;color:var(--muted);margin:8px 0}.reader-tools button,.subscription-tools button,.discussion button{min-height:44px}
.subscription-tools{display:grid;gap:10px;margin:20px 0;max-width:100%}.subscription-tools input{width:100%;min-width:0;box-sizing:border-box;background:var(--paper);color:var(--ink);border:1px solid var(--field);padding:12px;font:inherit}
.chapter-navigation{display:flex;gap:18px;justify-content:space-between;margin:32px 0;border-top:1px solid var(--line);padding-top:20px;overflow-wrap:anywhere}.chapter-navigation a{flex:1;min-width:0}
.discussion{border-top:1px solid var(--line);margin-top:36px;padding-top:20px;--waline-theme-color:var(--blue);--waline-text-color:var(--ink);--waline-bg-color:var(--paper);--waline-border-color:var(--line)}
#reader-message{padding:10px;border-left:3px solid var(--blue);background:var(--wash)}
@media(max-width:600px){.chapter-navigation{flex-direction:column}.reader-tools{font-size:14px}}
@media print{.reader-tools,.chapter-navigation,.discussion,#reader-message,.subscription-tools{display:none!important}}

/* Compact tools follow the existing palette and are absent from printed content. */
article{font-size:var(--reader-size,16px)}article p,article li{line-height:var(--reader-line,1.95)}
article h3{font-size:max(18px,var(--reader-size,16px))}
.reading-shortcuts{font-size:14px;display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.section-actions{font-size:13px;margin:12px 0 22px;color:var(--muted)}.section-actions summary{cursor:pointer;min-height:44px;padding:8px 0}.section-actions input{position:static!important;width:100%;font:inherit;padding:9px;background:var(--wash);color:var(--ink);border:1px solid var(--line)}.section-actions button{margin:8px 8px 8px 0}.section-actions label{display:block}.section-actions select{max-width:100%;margin:8px}
#reading button,#reading select{min-height:44px}#reading label{display:block;margin:12px 0}#reading input[type=file]{max-width:100%;font:inherit}#reading select{font:inherit;background:var(--paper);color:var(--ink);border:1px solid var(--field);padding:6px}.home-path-entry{display:block;padding:16px;background:var(--wash);border:1px solid var(--line)}
article input[type=checkbox]:not(:disabled){cursor:pointer;width:1.25em;height:1.25em;top:.35em}
.static-page{max-width:900px;margin:auto;padding:24px}.static-page header{position:static;height:auto;padding:8px 0}.static-page main{padding:10px 0}.offline-row{border-bottom:1px solid var(--line);padding:16px 0}.offline-row button{min-height:44px;margin:8px}.offline-row a{overflow-wrap:anywhere}.offline-row small{display:block}.offline-filter{display:block;width:100%;padding:10px;font:inherit}
@media print{.section-actions,.reading-shortcuts,.home-path-entry,.static-tools{display:none!important}article input[type=checkbox]{print-color-adjust:exact}}

.static-page article input[type=checkbox]{position:static;display:inline-block;margin-right:.5em;width:1em;height:1em}

#reading .task-item>label,#reading .task-item>p>label{display:inline-block;min-height:44px;margin:0;cursor:pointer}article .task-item{min-height:44px}

#menu{display:block}#chapter-dialog{width:min(640px,calc(100% - 32px));max-height:75vh;overflow:auto;border:1px solid var(--line);border-radius:8px;background:var(--paper);color:var(--ink);padding:24px}#chapter-dialog::backdrop{background:rgba(0,0,0,.3)}#chapter-dialog button{min-height:44px;margin:0 8px 8px 0}#chapter-dialog li{margin:12px 0}#chapter-dialog h2{margin-top:0}
@media(min-width:801px) and (max-width:1150px){header nav>a{display:none}}

@media(max-width:800px){header{height:auto;min-height:76px;flex-wrap:wrap;gap:8px;padding-block:10px}header nav{flex-wrap:wrap}#search-menu{font-size:13px;padding:6px 8px}}

.section-actions textarea{box-sizing:border-box;width:100%;max-width:100%;font:inherit;resize:vertical}.copyright{font-size:.85rem;line-height:1.7}

/* Direct scenario entries supplement the complete directory and reading routes. */
.scenario-start h2{font-size:20px;margin:20px 0 10px}.scenario-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.scenario-links a{display:block;min-height:44px;padding:10px 12px;border:1px solid var(--line);border-radius:4px;text-decoration:none;overflow-wrap:anywhere}.scenario-start .hint{margin-top:12px}.review-scope{margin:18px 0;overflow-wrap:anywhere}.review-scope p,.review-scope li{font-size:14px}.review-scope a{display:inline}.review-scope li{margin:10px 0}.search-help{margin:12px 0}.search-help a{display:inline-block;padding:8px 12px 8px 0}