:root{color-scheme:light dark;--paper:#f7f4ed;--ink:#262c28;--muted:#647068;--line:#dcded4;--accent:#315d48;--card:#fffdf7;--target:#e9f1dc;--warning:#785828}
*{box-sizing:border-box}html{scroll-padding-top:76px}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Noto Sans CJK SC",sans-serif;font-size:18px;line-height:1.85;-webkit-text-size-adjust:100%;overflow-wrap:anywhere}a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:4px}a:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:5px}header,main,footer{max-width:760px;margin:auto;padding:30px 24px}.eyebrow{font-size:12px;letter-spacing:.17em;color:var(--muted)}h1{font-size:clamp(42px,10vw,64px);line-height:1.15;margin:18px 0 20px;font-family:"Songti SC",serif;letter-spacing:.05em}h2{font-size:28px;line-height:1.4;margin:0 0 22px}h3{font-size:21px;line-height:1.6;margin:0 0 12px}p{margin:0 0 1.05em}.meta,.small{font-size:14px;color:var(--muted)}.deck{font-size:19px;line-height:1.8;max-width:32em}.status{border-left:3px solid #b68d4c;padding:12px 16px;margin-top:26px;font-size:14px;background:var(--card)}.status strong{color:var(--warning)}.bar{position:sticky;top:0;z-index:5;background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.nav-inner{max-width:760px;margin:auto;display:flex;justify-content:space-between;padding:0 14px;gap:3px}.bar a{font-size:14px;text-decoration:none;display:block;padding:14px 9px;min-height:48px}.guide-section{margin:10px 0 60px}details{border-top:1px solid var(--line);padding:14px 0}summary{cursor:pointer;min-height:44px;line-height:1.6;padding:6px 0}summary::marker{color:var(--muted)}.chapter-link{display:block;font-weight:600;font-size:18px;text-decoration:none;padding:6px 0}.toc-sub{margin:12px 0 15px;padding:0;list-style:none}.toc-sub li{border-bottom:1px dotted var(--line)}.toc-sub a{display:block;padding:9px 0;font-size:15px;text-decoration:none}.toc-sub small{float:right;margin-left:10px;color:var(--muted)}.argument{padding:24px 0;border-top:1px solid var(--line)}.argument h3 a{color:var(--ink);text-decoration:none}.argument .number{font-size:12px;letter-spacing:.15em;color:var(--muted);margin-bottom:8px}.evidence{font-size:16px;color:var(--muted);margin-bottom:14px}.refs{display:flex;flex-wrap:wrap;gap:5px 15px;font-size:14px}.refs a{padding:4px 0}.essential{padding:18px 0;border-top:1px solid var(--line)}.essential a{text-decoration:none}.original-intro{margin-bottom:50px}.page{margin:0 0 45px;content-visibility:auto;contain-intrinsic-size:auto 900px}.page:has(:target){content-visibility:visible}.page-meta{font-size:12px;color:var(--muted);letter-spacing:.06em;border-top:1px solid var(--line);padding:12px 0 22px;display:flex;justify-content:space-between;gap:15px}.source-block{margin:0 0 24px;scroll-margin-top:80px;border-radius:5px}.source-block:target,.guide-item:target{background:var(--target);outline:8px solid var(--target)}.original-text{font-size:19px;line-height:1.95;font-family:"Songti SC","Noto Serif CJK SC",Georgia,serif;text-align:justify;white-space:pre-wrap}.source-heading{font-size:22px;margin:36px 0 20px;line-height:1.7}.source-chapter{font-size:30px;margin:55px 0;line-height:1.6}.source-footnote{font-size:15px;line-height:1.7;color:var(--muted)}.continuation,.backrefs{font-size:12px;color:var(--muted);line-height:1.7;margin:8px 0;display:flex;flex-wrap:wrap;gap:9px}.scan{font-size:14px}.scan img,.figure img{max-width:100%;height:auto;display:block;margin:14px auto;background:white}.scan summary{color:var(--accent)}.figure{margin:24px 0}.figure figcaption{font-size:13px;color:var(--muted);line-height:1.7}.ocr-flag{color:var(--warning);font-size:12px;margin-bottom:12px}.blank{color:var(--muted);font-size:14px;padding:18px 0}.running-footer{font-size:12px;color:var(--muted)}.foot{border-top:1px solid var(--line);font-size:13px;color:var(--muted);padding-bottom:70px}noscript{font-size:13px}.end{text-align:center;color:var(--muted);margin:50px 0}.jump-primary{display:inline-block;padding:10px 18px;border:1px solid var(--accent);border-radius:30px;text-decoration:none;margin-top:10px;font-size:15px}button{font:inherit}
@media(max-width:430px){header,main,footer{padding-left:21px;padding-right:21px}header{padding-top:34px}.bar a{font-size:13px;padding-left:6px;padding-right:6px}.original-text{font-size:19px;line-height:1.92}h2{font-size:26px}.source-chapter{font-size:27px}.page-meta{letter-spacing:0}.status{padding:12px}.nav-inner{padding:0 11px}}
@media(prefers-color-scheme:dark){:root{--paper:#1c221e;--ink:#e4e8df;--muted:#a4afa5;--line:#3c483e;--accent:#b1d3b6;--card:#252e27;--target:#394a34;--warning:#e3c18b}.scan img,.figure img{background:white}.status{border-color:#b79661}}
@media print{.bar,.backrefs,.scan{display:none}.page{content-visibility:visible}.guide-section{break-after:page}body{background:white;color:black}.source-block:target{background:transparent;outline:none}}
/* User-led section summaries and selections. */
.section-summary{padding:24px 0;scroll-margin-top:90px}.section-summary h3{font-size:19px}.section-summary>p{font-size:16px;line-height:1.9}.section-actions{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;align-items:center}.toc-sub .section-actions a{font-size:14px;padding:4px 0}.summary-evidence{border:0;padding:0;margin:6px 0 0}.summary-evidence summary{font-size:12px;color:var(--muted);min-height:36px;padding:7px 0}.summary-evidence .refs a{font-size:12px}.section-summary:target,.saved-card:target,.excerpt-target{background:var(--target);outline:6px solid var(--target)}button,.import-label{border:1px solid var(--line);background:var(--card);color:var(--accent);border-radius:9px;padding:10px 14px;font-size:14px;min-height:44px;cursor:pointer}.save-button{font-size:12px;padding:7px 12px;background:transparent;line-height:1.4}.save-button[aria-pressed=true]{background:var(--target);border-color:var(--accent)}.source-block>.save-button{margin:0 0 6px}.collection-tools{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0}.import-label{display:inline-flex;align-items:center;position:relative;overflow:hidden}.import-label input{position:absolute;inset:0;opacity:0;width:100%;cursor:pointer}.saved-card{padding:22px 0;border-top:1px solid var(--line);scroll-margin-top:90px}.saved-text{white-space:pre-wrap;font-size:17px;line-height:1.9;margin-top:12px}.saved-card>a{font-size:14px}.remove-save{float:right;font-size:12px}.empty-state{padding:24px 18px;background:var(--card);font-size:15px;color:var(--muted)}#saved-count{font-size:17px;color:var(--muted)}#selection-bar{position:fixed;z-index:20;bottom:max(12px,env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);width:min(94vw,540px);background:var(--card);border:1px solid var(--line);box-shadow:0 8px 40px #0003;border-radius:14px;padding:10px;display:flex;align-items:center;gap:8px;font-size:12px}#selection-bar[hidden]{display:none}#selection-label{flex:1}#save-selection{background:var(--accent);color:var(--paper)}#reader-toast{position:fixed;z-index:30;bottom:100px;left:50%;transform:translateX(-50%);max-width:90vw;background:var(--ink);color:var(--paper);border-radius:12px;padding:12px 18px;font-size:14px;pointer-events:none;box-shadow:0 2px 18px #0002}#reader-toast:empty{display:none}button:focus-visible{outline:3px solid var(--accent);outline-offset:3px}@media print{.save-button,.collection-tools,.remove-save,#selection-bar,#reader-toast{display:none}}

/* Continuous original text; provenance fragments never create a visual page. */
.read-section{margin:0 0 48px;scroll-margin-top:90px}.reading-paragraph{margin:0 0 1.15em;text-indent:2em}.reading-paragraph.inset{margin-left:1em;padding-left:.7em;border-left:2px solid var(--line);font-size:18px}.source-fragment{scroll-margin-top:90px}.source-fragment:target{background:var(--target);outline:3px solid var(--target)}.page-anchor{display:inline;scroll-margin-top:90px}.reading-actions{display:flex;gap:12px 18px;align-items:center;flex-wrap:wrap;margin:28px 0 0;padding-top:14px;border-top:1px solid var(--line);font-size:13px}.reading-actions a{padding:7px 0}.source-audit{margin:55px 0}.source-audit>.scan{padding-left:8px}.archive-text{font-size:15px;white-space:pre-wrap}.figure-transcript{font-size:14px}.collection-group{margin:30px 0 40px}.collection-group>h3{font-size:19px;margin-bottom:8px}.collection-group .empty-state{padding:10px 0;background:transparent}.saved-card h4{margin:10px 0;font-size:18px}.saved-section-text{border:0;padding:0 0 12px}.saved-section-text>summary{font-size:14px;color:var(--accent)}.source-footnote{margin-top:20px}.excerpt-target{outline:2px solid var(--target)}
@media(max-width:430px){.reading-paragraph.inset{margin-left:.45em;padding-left:.55em}.reading-actions{gap:8px 14px}}
@media print{.reading-actions,.source-audit{display:none}}

/* Book text and interface annotations deliberately use different type families. */
:root{--book-font:"Songti SC","STSong","SimSun","Noto Serif CJK SC",serif;--ui-font:-apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif;--source-ink:#28231d;--ink:#354b56;--muted:#68777e;--accent:#3b6576;--note-paper:#edf2f3;--annotation-ink:#405b69}
body{font-family:var(--ui-font)}.source-fragment,.book-title,.source-quote,.guide-item>summary,.section-summary h3,header .meta{font-family:var(--book-font);color:var(--source-ink)}
.original-text,.source-heading,.source-chapter,.source-minor-heading,.source-footnote,.archive-text{font-family:var(--book-font);color:var(--source-ink)}
.source-minor-heading{font-size:20px;line-height:1.7;font-weight:600;margin:30px 0 14px}.reading-group{scroll-margin-top:90px}.reading-group+.reading-group{margin-top:38px}.reading-group>h4{font-size:22px}.reading-actions{margin:24px 0 0;padding-top:10px;border-top:0}.section-audit-link{font-size:12px;margin:26px 0 12px;color:var(--muted)}
.section-summary>p,.saved-card[data-kind="summary"] .saved-text{font-family:var(--ui-font);color:var(--annotation-ink);background:var(--note-paper);border-left:2px solid var(--accent);padding:12px 15px;border-radius:0 8px 8px 0}
.collection-tabs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:5px;position:sticky;top:57px;z-index:4;background:var(--paper);padding:10px 0;border-bottom:1px solid var(--line);margin:22px 0 0}.collection-tab{display:flex;align-items:center;justify-content:center;gap:5px;padding:10px 4px;font-size:14px;white-space:nowrap;border-radius:8px 8px 0 0;border-color:transparent;background:transparent}.collection-tab[aria-selected="true"]{background:var(--note-paper);color:var(--accent);border-bottom:3px solid var(--accent)}.tab-count{font-size:11px;opacity:.8}.collection-group[hidden]{display:none!important}.collection-group{margin-top:20px}.collection-group .saved-card{scroll-margin-top:160px}.saved-text.source-quote{font-family:var(--book-font);font-size:19px;color:var(--source-ink)}
@media(max-width:430px){.collection-tabs{top:55px}.collection-tab{font-size:13px;gap:3px}.tab-count{font-size:10px}.source-minor-heading{font-size:19px}}
@media(prefers-color-scheme:dark){:root{--source-ink:#f0e9dd;--ink:#c9d6dd;--muted:#a0b3bd;--accent:#a7cadb;--note-paper:#24333c;--annotation-ink:#bfd2df}}
@media print{.collection-tabs{display:none}.collection-group[hidden]{display:block!important}}

.collection-group{scroll-margin-top:135px}

/* Three reader pages share one offline file and never form a scrolling chain. */
.reader-page[hidden],[data-reader-cover][hidden],.reader-back[hidden]{display:none!important}.reader-page{min-height:45vh}.reader-end{display:flex;justify-content:space-between;align-items:center;gap:16px;border-top:1px solid var(--line);padding:22px 0 8px;margin:24px 0 0;color:var(--muted);font-size:13px}.reader-end a{white-space:nowrap}.nav-inner{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0}.nav-inner a{text-align:center;border-bottom:3px solid transparent}.nav-inner a[aria-current="page"]{font-weight:600;color:var(--accent);border-bottom-color:var(--accent);background:var(--note-paper)}.bar .reader-back{max-width:760px;margin:auto;font-size:12px;min-height:32px;padding:5px 24px;border-top:1px solid var(--line)}.reader-page>.guide-section:last-of-type{margin-bottom:25px}.collection-tabs{top:60px}body[data-reader-view="original"]{scroll-padding-top:120px}body[data-reader-view="original"] .source-fragment,body[data-reader-view="original"] .reading-group{scroll-margin-top:120px}
@media(max-width:430px){.collection-tabs{top:58px}.bar .reader-back{padding-left:21px;padding-right:21px}}
@media print{.reader-end{display:none}}
/* Cloud reader has a persistent route back to the multi-book shelf. */
body[data-server="true"] .collection-tabs{top:94px}
body[data-server="true"][data-reader-view="original"] .source-fragment,body[data-server="true"][data-reader-view="original"] .reading-group{scroll-margin-top:154px}