@import url('./fonts.css?v=20261102-footer');
:root{--ink:#101416;--paper:#f7f7f3;--soft:#edeeea;--line:#d5d9d5;--teal:#0b7465;--mint:#a7edcb;--muted:#65706e;--header:72px;font-family:'LTCC Sans','PingFang SC',sans-serif;font-weight:400;color:var(--ink);background:var(--paper);font-synthesis:none;scroll-padding-top:100px}
*{box-sizing:border-box}body{margin:0}a{color:var(--teal);text-decoration:none}a:hover{text-decoration:underline;text-underline-offset:4px}button,input{font:inherit}button{cursor:pointer}button:disabled{cursor:default}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--teal);outline-offset:4px}button{border:1px solid var(--line);border-radius:7px;background:transparent;padding:8px 12px;color:inherit}.skip{position:fixed;top:-80px;left:12px;background:white;padding:12px;z-index:100}.skip:focus{top:8px}.topbar{height:var(--header);position:sticky;top:0;z-index:20;background:var(--ink);color:white;display:flex;align-items:center;gap:24px;padding:0 30px}.brand{display:flex;align-items:center;flex-shrink:0;padding:6px 0}.brand img{display:block;width:184px;height:auto}.book-name{font-size:15px;color:var(--mint);border-left:1px solid #45504e;padding-left:24px}.top-links{margin-left:auto;display:flex;align-items:center;gap:24px}.top-links a{color:#f7f7f3;font-size:14px}.search-open{display:flex;align-items:center;gap:35px;background:#1d2526;color:#eee;border-color:#43504c;font-size:13px;min-width:150px}.search-open kbd{font:11px monospace;color:#a7edcb}.menu-toggle{display:none;color:white;border-color:#43504c}.shell{display:grid;grid-template-columns:268px minmax(0,1fr);max-width:1660px;margin:auto}.sidebar{position:sticky;top:var(--header);height:calc(100vh - var(--header));overflow:auto;padding:30px 20px 32px 28px;border-right:1px solid var(--line);font-size:13px;scrollbar-width:thin}.overview-link{display:block;padding:9px 11px;margin-bottom:15px;color:var(--ink)}.sidebar details{margin-bottom:17px}.sidebar summary{cursor:pointer;font-size:14px;font-weight:500;padding:6px 10px;color:var(--ink)}.sidebar ul{list-style:none;margin:9px 0 0;padding:0}.sidebar li a{display:flex;align-items:baseline;gap:8px;padding:8px 11px;border-radius:5px;line-height:1.65;color:#4a5552}.sidebar li a span{flex-shrink:0;font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums}.sidebar a[aria-current=page]{background:#e1eee7;color:#064f49;font-weight:500}.sidebar .part-intro{font-size:12px;margin-bottom:3px;color:var(--muted)}.sidebar-foot{margin-top:25px;padding:20px 10px;border-top:1px solid var(--line);font-size:11px;color:var(--muted);line-height:1.8}.content-grid{display:grid;grid-template-columns:minmax(0,780px) 172px;gap:44px;padding:40px 44px 30px;justify-content:center;min-width:0}main{min-width:0}.breadcrumb{font-size:12px;color:var(--muted);margin-bottom:20px;display:flex;gap:9px;flex-wrap:wrap}.article h1,.landing h1{font-family:'LTCC Serif',serif;font-weight:900;font-size:38px;line-height:1.45;letter-spacing:-.6px;margin:0 0 28px}.article{font-size:16px;line-height:1.95;overflow-wrap:anywhere}.article>p:first-of-type{font-size:18px;color:#44514c;line-height:1.9;margin-bottom:32px}.article h2{font-size:23px;font-weight:500;line-height:1.55;margin:46px 0 18px;padding-top:6px;border-top:1px solid var(--line);scroll-margin-top:95px}.article h3{font-size:18px;font-weight:500;margin:28px 0 12px;scroll-margin-top:95px}.article h4{font-size:16px;font-weight:500}.article p{margin:15px 0}.article ul,.article ol{padding-left:1.5em}.article li{margin:7px 0}.article strong{font-weight:550}.article blockquote{border-left:3px solid var(--teal);margin:25px 0;padding:2px 20px;background:#eef2ed;color:#43534b}.article blockquote p{margin:12px 0}.article code{font-family:ui-monospace,SFMono-Regular,monospace;font-size:.87em;background:#e9ede7;border-radius:4px;padding:2px 5px}.code-wrap{position:relative;margin:24px 0;background:#edf0ea;border:1px solid var(--line);border-radius:8px;overflow:hidden}.code-label{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:9px 15px;border-bottom:1px solid var(--line);font-size:12px;color:var(--muted)}.copy-code{padding:4px 10px;background:var(--paper);font-size:12px}.article pre{margin:0;white-space:pre-wrap;overflow-wrap:anywhere;padding:20px 23px;line-height:1.8}.article pre code{background:none;padding:0;font-size:14px}.table-wrap{overflow:auto;max-width:100%;margin:22px 0;border:1px solid var(--line);border-radius:7px}.article table{border-collapse:collapse;width:100%;font-size:14px;line-height:1.75;min-width:440px}.article th,.article td{text-align:left;vertical-align:top;padding:12px 15px;border-bottom:1px solid var(--line);min-width:100px}.article th{background:#e9eee7;font-weight:500}.article tr:last-child td{border-bottom:0}.article figure{margin:27px 0}.image-open{display:block;width:100%;padding:0;border:1px solid var(--line);border-radius:8px;background:white;overflow:hidden}.image-open img{display:block;width:100%;height:auto}.article figcaption{font-size:12px;color:var(--muted);line-height:1.7;margin:10px 3px}.article video{max-width:100%;height:auto;display:block;background:#fff;border:1px solid var(--line);border-radius:8px}.article hr{border:0;border-top:1px solid var(--line);margin:36px 0}.toc{position:sticky;top:110px;align-self:start;max-height:calc(100vh - 140px);overflow:auto;font-size:12px;line-height:1.7;border-left:1px solid var(--line);padding-left:18px}.toc strong{display:block;font-weight:500;color:var(--ink);margin-bottom:13px}.toc a{display:block;color:var(--muted);margin:10px 0}.toc a.active{color:var(--teal);font-weight:500}.toc .sub{padding-left:10px;font-size:11px}.page-nav{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:55px;border-top:1px solid var(--line);padding-top:23px}.page-nav a{font-size:14px;line-height:1.7;color:var(--ink)}.page-nav a:last-child{text-align:right}.page-nav small{display:block;color:var(--muted);font-size:11px;margin-bottom:6px}.footer{margin-top:44px;padding:22px 0;border-top:1px solid var(--line);font-size:11px;color:var(--muted);line-height:1.8}.footer a{color:var(--muted)}.landing h1{font-size:46px;max-width:650px;margin-bottom:18px}.landing-lead{font-size:19px;line-height:1.9;max-width:660px;color:#52605a}.start-row{display:flex;gap:14px;flex-wrap:wrap;margin:30px 0 42px}.primary{display:inline-block;background:var(--teal);color:white;border:1px solid var(--teal);border-radius:7px;padding:12px 22px;font-size:14px}.secondary{display:inline-block;border:1px solid var(--line);color:var(--ink);border-radius:7px;padding:12px 22px;font-size:14px}.primary:hover,.secondary:hover{text-decoration:none;filter:brightness(.93)}.overview-intro{border-top:1px solid var(--line);padding-top:26px;display:grid;grid-template-columns:1fr 1fr;gap:25px;font-size:14px;line-height:1.9;color:var(--muted);margin-bottom:36px}.overview-intro p{margin:0}.part-section{margin:36px 0 44px;scroll-margin-top:95px}.part-heading{display:flex;gap:20px;align-items:baseline;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:14px}.part-heading h2{margin:0;font-size:24px;font-weight:500}.part-heading a{font-size:12px}.part-description{font-size:14px;color:var(--muted);line-height:1.8;margin:16px 0}.chapter-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;column-gap:30px}.chapter-list li{border-bottom:1px solid #e0e4dc}.chapter-list a{display:flex;gap:13px;line-height:1.65;padding:14px 0;color:var(--ink);font-size:14px}.chapter-list span{color:var(--teal);font-size:12px;min-width:23px;font-variant-numeric:tabular-nums}.chapter-list a:hover{color:var(--teal)}.appendix-strip{background:var(--soft);padding:22px;border-radius:8px;display:grid;gap:16px}.appendix-strip a{display:block;color:var(--ink);font-size:15px}.appendix-strip small{display:block;color:var(--muted);font-size:12px;line-height:1.7;margin-top:5px}dialog{border:1px solid var(--line);border-radius:12px;padding:0;color:var(--ink);background:var(--paper);box-shadow:0 16px 80px #0003}dialog::backdrop{background:#10141699}.search-dialog{width:min(690px,calc(100vw - 28px));margin:12vh auto;max-height:76vh}.search-head{display:flex;align-items:center;gap:12px;padding:16px;border-bottom:1px solid var(--line)}.search-head input{flex:1;width:0;border:0;padding:9px;background:transparent;outline:none;font-size:17px}.search-results{max-height:53vh;overflow:auto;padding:8px 16px 16px}.search-results a{display:block;padding:13px 12px;border-bottom:1px solid var(--line);color:var(--ink);line-height:1.7}.search-results a strong{font-weight:500;font-size:15px}.search-results a p{font-size:12px;color:var(--muted);margin:5px 0 0}.search-results mark{background:#c9eedc;color:#064f49}.search-hint{padding:16px 12px;font-size:13px;color:var(--muted)}.image-dialog{width:min(1500px,96vw);max-width:96vw;max-height:94vh;background:#fff}.image-dialog header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:12px 18px;position:sticky;top:0;background:#fff;border-bottom:1px solid var(--line);font-size:12px}.image-dialog img{display:block;max-width:100%;height:auto;margin:auto}.image-dialog .image-body{max-height:80vh;overflow:auto}.image-dialog a{white-space:nowrap}.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--ink);color:white;padding:10px 20px;border-radius:7px;font-size:13px;z-index:80}.toast:empty{display:none}.mobile-backdrop{display:none}.guide-start{margin:30px 0}.reading-meta{font-size:12px;color:var(--muted);margin-top:-12px;margin-bottom:25px}.draft-banner{font-size:12px;background:#edeeea;padding:9px 15px;border-radius:5px;color:#52605a;margin-bottom:24px}
@media(min-width:1500px){.content-grid{padding-left:60px;padding-right:60px;gap:54px}}
@media(max-width:1200px){.content-grid{grid-template-columns:minmax(0,760px);padding:34px 40px}.toc{display:none}.top-links>a{display:none}.shell{grid-template-columns:255px minmax(0,1fr)}.sidebar{padding-left:18px}.book-name{padding-left:18px}.topbar{gap:18px;padding:0 22px}}
@media(max-width:820px){:root{--header:64px}.topbar{padding:0 18px;gap:14px}.brand img{width:180px}.book-name{display:none}.top-links{gap:10px}.search-open{min-width:0;padding:8px 10px}.search-open kbd{display:none}.menu-toggle{display:block;padding:8px 10px}.shell{display:block}.sidebar{position:fixed;z-index:30;top:var(--header);left:0;width:290px;background:var(--paper);transform:translateX(-101%);transition:transform .15s ease}.menu-open .sidebar{transform:translateX(0)}.menu-open .mobile-backdrop{display:block;position:fixed;inset:var(--header) 0 0;background:#10141666;z-index:25}.content-grid{display:block;padding:28px 24px}.article h1{font-size:31px}.landing h1{font-size:37px}.article{font-size:16px;line-height:1.95}.article h2{font-size:22px}.article>p:first-of-type{font-size:17px}.landing-lead{font-size:17px}.overview-intro{grid-template-columns:1fr;gap:16px}.chapter-list{grid-template-columns:1fr}.part-heading h2{font-size:22px}.article pre{padding:16px}.page-nav{gap:16px}.part-section{margin-bottom:35px}.search-dialog{margin-top:9vh}}
@media(max-width:370px){.brand img{width:160px}.topbar{padding:0 12px;gap:8px}.top-links{gap:6px}.search-open,.menu-toggle{font-size:12px;padding:7px}.content-grid{padding:24px 18px}.landing h1{font-size:33px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
@media print{.topbar,.sidebar,.toc,.page-nav,.copy-code,.footer{display:none}.shell,.content-grid{display:block;padding:0}.article{font-size:11pt}.article h1{font-size:22pt}.article figure,.code-wrap{break-inside:avoid}.article a{color:inherit}}

/* Small navigation uses the approved standalone mark. */
.brand img{width:32px;height:32px}.brand{padding:8px}.book-name{padding-left:0;border-left:0;color:#f7f7f3}.landing h1{max-width:700px}@media(max-width:820px){.brand img{width:28px;height:28px}.brand{padding:6px 0}.book-name{display:block;font-size:12px;line-height:1.5;max-width:130px}.topbar{gap:10px}.top-links{gap:7px}.search-open,.menu-toggle{font-size:12px}.landing h1{font-size:34px;word-break:keep-all;overflow-wrap:normal}}@media(max-width:370px){.book-name{max-width:115px;font-size:11px}.topbar{gap:8px}.brand img{width:26px;height:26px}.landing h1{font-size:29px}}

@media(max-width:820px){body.menu-open{overflow:hidden}}

.table-toolbar{display:flex;align-items:center;gap:12px;padding:10px 14px;background:#f0f2ec;border-bottom:1px solid var(--line);font-size:11px;color:var(--muted)}.copy-table{font-size:12px;padding:4px 10px;background:var(--paper)}

/* 阅读字重：用户2026-11-02审阅调整 */
.article{font-weight:400}.sidebar{font-weight:450}.sidebar summary,.sidebar a[aria-current=page]{font-weight:600}.article strong{font-weight:650}

.community-open{color:var(--mint);border-color:#526b60;white-space:nowrap}.community-dialog{width:min(390px,calc(100vw - 28px));padding:24px;text-align:center}.community-head{display:flex;align-items:center;justify-content:space-between;gap:16px}.community-head h2{font-size:20px;margin:0}.community-dialog img{display:block;width:min(280px,100%);height:auto;margin:24px auto;background:white}.community-dialog p{font-size:14px;line-height:1.8}.community-note{color:var(--muted);font-size:12px!important}.main-site-link{white-space:nowrap}.top-links{gap:16px}.start-reading-link{display:none!important}@media(max-width:1100px){.book-name{font-size:13px}.main-site-link{font-size:12px!important}}@media(max-width:820px){.top-links .main-site-link{display:inline!important;font-size:11px!important;max-width:92px;white-space:normal;line-height:1.4}.community-open{font-size:12px;padding:6px 8px}.top-links{gap:7px}.topbar{padding-left:12px;padding-right:12px;gap:10px}.book-name{display:none}}

.top-links .main-site-link{display:inline!important}

.book-title{display:flex;align-items:center;gap:20px}.book-title img{flex:none;object-fit:contain}.stats-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:24px 0}.stats-card{padding:20px;background:var(--paper,#f7f7f2);border:1px solid #dce3df;border-radius:12px}.stats-card strong{display:block;font:600 32px/1.4 sans-serif}.stats-card span{font-size:14px}.stats-table{overflow-x:auto}.stats-table table{width:100%;min-width:440px}.stats-table td,.stats-table th{text-align:left;padding:12px;border-bottom:1px solid #e2e7e4}.stats-status{color:#53645d;font-size:14px}@media(max-width:600px){.book-title{gap:12px}.book-title img{width:44px;height:44px}.stats-cards{grid-template-columns:1fr}.stats-card{padding:14px}}

.footer-heading{display:flex;align-items:baseline;justify-content:space-between;gap:8px 24px;flex-wrap:wrap;margin-bottom:6px}.footer-stats{white-space:nowrap;font-variant-numeric:tabular-nums}