pre code.hljs{padding:1em;display:block;overflow-x:auto}code.hljs{padding:3px 5px}.hljs{color:#24292e;background:#fff}.hljs-doctag,.hljs-keyword,.hljs-meta .hljs-keyword,.hljs-template-tag,.hljs-template-variable,.hljs-type,.hljs-variable.language_{color:#d73a49}.hljs-title,.hljs-title.class_,.hljs-title.class_.inherited__,.hljs-title.function_{color:#6f42c1}.hljs-attr,.hljs-attribute,.hljs-literal,.hljs-meta,.hljs-number,.hljs-operator,.hljs-variable,.hljs-selector-attr,.hljs-selector-class,.hljs-selector-id{color:#005cc5}.hljs-regexp,.hljs-string,.hljs-meta .hljs-string{color:#032f62}.hljs-built_in,.hljs-symbol{color:#e36209}.hljs-comment,.hljs-code,.hljs-formula{color:#6a737d}.hljs-name,.hljs-quote,.hljs-selector-tag,.hljs-selector-pseudo{color:#22863a}.hljs-subst{color:#24292e}.hljs-section{color:#005cc5;font-weight:700}.hljs-bullet{color:#735c0f}.hljs-emphasis{color:#24292e;font-style:italic}.hljs-strong{color:#24292e;font-weight:700}.hljs-addition{color:#22863a;background-color:#f0fff4}.hljs-deletion{color:#b31d28;background-color:#ffeef0}:root{--c-bg:#fff;--c-bg-soft:#f8f8f9;--c-bg-mute:#f1f1f3;--c-surface:#fff;--c-surface-warm:#fafaf7;--c-border:#0000001f;--c-border-strong:#00000040;--c-text:#1f2329;--c-text-soft:#000000b3;--c-text-dim:#3c3c3c80;--c-text-faint:#3c3c3c4d;--c-muted:#3c3c3c80;--c-primary:#0052d9;--c-primary-soft:#e8f3ff;--c-warn:#d97706;--c-warn-soft:#fff7e6;--c-success:#059669;--c-success-soft:#e6f4ea;--c-highlight:#fff3a0;--c-highlight-comment:#ffd84d;--c-code-bg:#99a1b314;--c-code-border:#0000000f;--c-code-text:#476582;--sidebar-w:264px;--content-w:920px;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--radius:var(--radius-md);--shadow-sm:0 1px 2px #0000000a, 0 1px 0 #0000000f;--shadow:0 3px 12px #0000000f, 0 1px 4px #00000012;--shadow-lg:0 12px 32px #0000001a, 0 2px 6px #00000014;--z-sidebar:50;--z-sticky:60;--z-dropdown:70;--z-backdrop:100;--z-modal:200;--z-popover:210;--z-tooltip:220;--z-toast:230;--hl-1:#fff3a0;--hl-2:#bfe3ff;--hl-3:#c8f0c8;--hl-4:#ffc8e0;--hl-current:var(--hl-1);--reading-font-size:16px;--reading-font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--reading-bg:#fff;--reading-text:#1f2329;--reading-line-height:1.85;--reading-stage:#eceae3;--reading-page:#fff;--svg-text:#1f2329;--svg-text-dim:#6b7280;--svg-line:#9ca3af;--svg-box:#f7f8fa;--svg-box-accent:#e8f3ff}[data-theme=dark]{--c-bg:#121212;--c-bg-soft:#1a1a1d;--c-bg-mute:#26262a;--c-surface:#1a1a1d;--c-surface-warm:#1a1a1d;--c-border:#ffffff1f;--c-border-strong:#ffffff40;--c-text:#fffff5ed;--c-text-soft:#fffff5a6;--c-text-dim:#ebebeb66;--c-text-faint:#ebebeb2e;--c-muted:#ebebeb66;--c-primary:#60a5fa;--c-primary-soft:#60a5fa26;--c-warn:#fbbf24;--c-warn-soft:#fbbf241f;--c-success:#34d399;--c-success-soft:#34d3991f;--c-highlight:#854d0e;--c-highlight-comment:#a16207;--c-code-bg:#ffffff0f;--c-code-border:#ffffff0d;--c-code-text:#c9def1;--reading-bg:#1a1a1d;--reading-text:#fffff5e0;--reading-stage:#15151a;--reading-page:#1e1e22;--svg-text:#fffff5ed;--svg-text-dim:#fffff58c;--svg-line:#ffffff4d;--svg-box:#1a1a1d;--svg-box-accent:#60a5fa2e;--shadow:0 3px 12px #0006, 0 1px 4px #0000004d;--shadow-lg:0 12px 40px #0009}[data-theme=dark] .readerTopBar{background:#1a1a1dc7}html,body{background:var(--reading-bg);color:var(--c-text);-webkit-font-smoothing:antialiased;margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;font-size:15px;line-height:1.7}#root{min-height:100vh}.reader{background:var(--reading-stage);min-height:100vh;position:relative}.app_content{max-width:1100px;min-height:100vh;color:var(--reading-text);font-size:var(--reading-font-size);line-height:var(--reading-line-height);font-family:var(--reading-font-family);align-items:flex-start;gap:24px;margin:0 auto;padding:80px 24px 100px;display:flex;position:relative}.app_content--page,.app_content--scroll{max-width:1200px;margin:0 auto;padding:64px 32px 100px;display:block}.app_content--page .reader__article,.app_content--scroll .reader__article{background:var(--reading-page);border-radius:var(--radius-md);box-shadow:var(--shadow);width:100%;padding:56px 64px}.app_content--page .reader__article:before{content:none}.app_content:not(.app_content--page):not(.app_content--scroll) .reader__article{background:var(--reading-page);border-radius:var(--radius-md);box-shadow:var(--shadow);width:100%;padding:56px 64px}.readerTopBar{-webkit-backdrop-filter:saturate(180%)blur(20px);backdrop-filter:saturate(180%)blur(20px);border-bottom:1px solid var(--c-border);height:52px;z-index:var(--z-sticky);background:#ffffffc7;justify-content:space-between;align-items:center;padding:0 24px;display:flex;position:fixed;top:0;left:0;right:0}.readerTopBar__trigger{display:none}.readerTopBar__left{flex:1;align-items:center;gap:10px;min-width:0;display:flex}.readerTopBar__book-icon{color:#fff;width:22px;height:22px;box-shadow:var(--shadow-sm);background:linear-gradient(135deg,#f87171 0%,#dc2626 100%);border-radius:4px;flex:none;justify-content:center;align-items:center;font-size:13px;display:flex}.readerTopBar__book-title{color:var(--c-text);white-space:nowrap;text-overflow:ellipsis;font-size:14px;font-weight:600;overflow:hidden}.readerTopBar__add-shelf{color:var(--c-text-soft);border:1px solid var(--c-border);cursor:pointer;background:0 0;border-radius:999px;align-items:center;gap:4px;margin-left:6px;padding:3px 10px;font-family:inherit;font-size:12px;transition:color .15s,border-color .15s,background .15s;display:inline-flex}.readerTopBar__add-shelf:hover{color:var(--c-primary);border-color:var(--c-primary);background:var(--c-primary-soft)}.readerTopBar__add-shelf.is-added{color:var(--c-text-dim);border-color:var(--c-border);cursor:default;background:0 0}.readerTopBar__right{flex:none;align-items:center;gap:4px;display:flex}.readerTopBar__nav-link{color:var(--c-text-soft);cursor:pointer;border-radius:var(--radius-md);background:0 0;border:none;padding:6px 12px;font-family:inherit;font-size:13px;transition:background .15s,color .15s}.readerTopBar__nav-link:hover{background:var(--c-bg-soft);color:var(--c-text)}.readerTopBar__avatar{color:#fff;cursor:pointer;width:28px;height:28px;box-shadow:var(--shadow-sm);background:linear-gradient(135deg,#60a5fa 0%,#a78bfa 100%);border-radius:50%;justify-content:center;align-items:center;margin-left:4px;font-size:12px;font-weight:600;display:flex}.readerTopBar__sep,.readerTopBar__chapter-title,.readerTopBar__btn,.readerTopBar__btn--primary{display:none}.readerControls{z-index:var(--z-sticky);flex-direction:column;gap:8px;display:flex;position:fixed;top:50%;right:24px;transform:translateY(-50%)}.readerControls__trigger{display:none}.readerControls__item{border:1px solid var(--c-border);background:var(--c-surface);width:48px;height:48px;color:var(--c-text-soft);cursor:pointer;box-shadow:var(--shadow-sm);border-radius:8px;justify-content:center;align-items:center;font-family:inherit;transition:background 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var(--c-border);background:var(--c-surface);color:var(--c-text-soft);cursor:pointer;box-shadow:var(--shadow-sm);border-radius:999px;align-items:center;gap:6px;padding:8px 16px;font-family:inherit;font-size:13px;transition:background .15s,color .15s,border-color .15s,transform .15s;display:inline-flex}.readerFooter__btn:hover:not(:disabled){background:var(--c-primary-soft);color:var(--c-primary);border-color:var(--c-primary)}.readerFooter__btn:disabled{opacity:.35;cursor:not-allowed}.readerFooter__btn--next{color:var(--c-primary);border-color:var(--c-primary-soft);background:var(--c-surface)}.readerFooter__btn--next:hover:not(:disabled){background:var(--c-primary);color:#fff;border-color:var(--c-primary)}.readerCatalog{background:var(--c-surface-warm);border-left:1px solid var(--c-border);width:480px;max-width:96vw;height:100vh;box-shadow:var(--shadow-lg);z-index:var(--z-modal);flex-direction:column;transition:transform .25s ease-out;display:flex;position:fixed;top:0;right:0;transform:translate(100%)}.readerCatalog.is-open{transform:translate(0)}.readerCatalog__header{border-bottom:1px solid var(--c-border);flex:none;justify-content:space-between;align-items:center;padding:16px 20px;display:flex}.readerCatalog__title{color:var(--c-text);font-size:16px;font-weight:600}.readerCatalog__close{color:var(--c-text-soft);cursor:pointer;background:0 0;border:none;border-radius:4px;padding:4px 8px;font-size:22px;line-height:1}.readerCatalog__close:hover{background:var(--c-bg-soft);color:var(--c-text)}.readerCatalog__search{border:1px solid var(--c-border);border-radius:var(--radius-md);background:var(--c-surface);color:var(--c-text-soft);cursor:pointer;flex:none;align-items:center;gap:8px;margin:12px 16px;padding:8px 12px;font-family:inherit;font-size:13px;transition:border-color .15s,color .15s;display:flex}.readerCatalog__search:hover{border-color:var(--c-primary);color:var(--c-primary)}.readerCatalog__list{flex:1;min-height:0;margin:0;padding:8px 12px;list-style:none;overflow-y:auto}.readerCatalog__item{cursor:pointer;width:100%;color:var(--c-text);text-align:left;background:0 0;border:none;border-radius:8px;align-items:center;gap:10px;padding:9px 10px;font-family:inherit;font-size:14px;transition:background .12s,color .12s;display:flex;position:relative}.readerCatalog__item:hover{background:#0000000e}.readerCatalog__item.is-active{background:var(--c-primary-soft);color:var(--c-primary);font-weight:600}.readerCatalog__item-num{width:22px;height:22px;color:var(--c-text-dim);font-variant-numeric:tabular-nums;background:#0000000d;border-radius:6px;flex:none;justify-content:center;align-items:center;font-size:11px;font-weight:600;display:flex}.readerCatalog__item:hover .readerCatalog__item-num{color:var(--c-text-soft);background:#00000017}.readerCatalog__item.is-active .readerCatalog__item-num{background:var(--c-primary);color:#fff}.readerCatalog__item-title{text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0;overflow:hidden}.readerCatalog__backdrop{z-index:calc(var(--z-modal) - 1);opacity:0;pointer-events:none;background:#00000052;transition:opacity .25s ease-out;position:fixed;inset:0}.readerCatalog__backdrop.is-open{opacity:1;pointer-events:auto}.readerCatalog__book-info{background:var(--c-surface);border:1px solid var(--c-border);border-radius:12px;flex:none;align-items:center;gap:12px;margin:14px 14px 8px;padding:12px;display:flex}.readerCatalog__book-cover{color:#fff;background:linear-gradient(135deg,#4a90e2 0%,#3574d4 100%);border-radius:6px;flex:none;justify-content:center;align-items:center;width:40px;height:54px;display:flex;box-shadow:0 2px 6px #3574d447}.readerCatalog__book-meta{flex:1;min-width:0}.readerCatalog__book-title{color:var(--c-text);text-overflow:ellipsis;-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:15px;font-weight:600;line-height:1.3;display:-webkit-box;overflow:hidden}.readerCatalog__book-author{color:var(--c-text-dim);margin-top:4px;font-size:12px}.readerCatalog__search-row{color:var(--c-text-dim);background:#0000000b;border-radius:999px;flex:none;align-items:center;gap:8px;margin:4px 14px 10px;padding:0 12px;transition:background .15s;display:flex}.readerCatalog__search-row:focus-within{color:var(--c-text-soft);background:#00000012}.readerCatalog__search-input{color:var(--c-text);background:0 0;border:none;outline:none;flex:1;padding:8px 0;font-family:inherit;font-size:13px}.readerCatalog__search-input::placeholder{color:var(--c-text-faint)}.readerCatalog__chapter{position:relative}.readerCatalog__chapter-row{align-items:center;display:flex}.readerCatalog__add-bookmark{color:var(--c-primary);cursor:pointer;white-space:nowrap;background:0 0;border:none;border-radius:4px;flex:none;padding:4px 8px;font-size:12px;transition:background .15s}.readerCatalog__add-bookmark:hover{background:var(--c-primary-soft)}.readerCatalog__add-bookmark.is-added{color:var(--c-text-soft);background:#0000000d}.readerCatalog__add-bookmark.is-added:hover{color:#d92d20;background:#fee2e2}.readerCatalog__sections{border-left:1px solid var(--c-border);margin:2px 0 8px 22px;padding:0 0 0 10px;list-style:none}.readerCatalog__section-item{width:100%;color:var(--c-text-soft);cursor:pointer;text-align:left;text-overflow:ellipsis;white-space:nowrap;background:0 0;border:none;border-radius:6px;padding:6px 10px;font-family:inherit;font-size:13px;transition:background .12s,color .12s;display:block;overflow:hidden}.readerCatalog__section-item:hover{color:var(--c-text);background:#0000000e}.readerCatalog__section-item.level-3{color:var(--c-text-dim);padding-left:24px;font-size:12px}.readerCatalog__section-item.is-current{color:var(--c-primary);background:var(--c-primary-soft);font-weight:600}.readerCatalog__chevron{color:var(--c-text-dim);flex:none;font-size:10px;transition:transform .15s;display:inline-block}.readerCatalog__chevron.is-open{transform:rotate(90deg)}.readerCatalog__section-row{align-items:center;gap:4px;display:flex}.readerCatalog__section-row .readerCatalog__section-item{flex:1;min-width:0}.sidebar__brand{align-items:center;gap:10px;padding:4px 8px 16px;display:flex}.sidebar__logo{background:linear-gradient(135deg, var(--c-primary) 0%, #4096ff 100%);color:#fff;width:32px;height:32px;box-shadow:var(--shadow-sm);border-radius:10px;flex:none;justify-content:center;align-items:center;font-size:16px;font-weight:700;display:flex}.sidebar__brand-text{min-width:0}.sidebar__brand-title{color:var(--c-text);white-space:nowrap;text-overflow:ellipsis;font-size:15px;font-weight:600;line-height:1.3;overflow:hidden}.sidebar__brand-sub{color:var(--c-muted);margin-top:2px;font-size:11px}.sidebar__list{flex-direction:column;flex:1;gap:2px;min-height:0;margin:12px 0 0;padding:0;list-style:none;display:flex}.sidebar__item{cursor:pointer;color:var(--c-text-soft);text-align:left;background:0 0;border:none;border-radius:10px;align-items:center;gap:12px;width:100%;padding:8px 12px;font-family:inherit;font-size:14px;transition:background .15s,color 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.reader__article h1{text-align:left;font-size:1.625rem}.reader__article h2{letter-spacing:-.01em;color:var(--reading-text);margin:3rem 0 1rem;font-size:1.25rem;font-weight:600}.reader__article h3{letter-spacing:-.01em;margin:2rem 0 .75rem;font-size:1.125rem;font-weight:600}.reader__article h4{color:var(--c-text-soft);margin:1.5rem 0 .5rem;font-size:1rem;font-weight:600}.reader__article p{max-width:100%;color:var(--reading-text);text-align:justify;margin-top:1rem;margin-bottom:1rem;line-height:1.7}.reader__article ul,.reader__article ol{max-width:100%;margin-top:1rem;margin-bottom:1rem;padding-left:1.75rem;line-height:1.8}.reader__article li{margin:.4rem 0}.reader__article blockquote{border-left:4px solid var(--c-primary);background:var(--c-primary-soft);max-width:100%;color:var(--c-text-soft);border-radius:0 var(--radius-lg) var(--radius-lg) 0;margin-top:1.5rem;margin-bottom:1.5rem;padding:1rem 1.25rem}.reader__article blockquote p{margin:.25rem 0}.reader__article 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10px;font-size:12px;font-weight:400;line-height:1.55;animation:.12s ease-out term-tip-in;position:fixed;box-shadow:0 6px 20px #00000038}@keyframes term-tip-in{0%{opacity:0}to{opacity:1}}.term-tip__arrow{border:5px solid #0000;width:0;height:0;position:absolute;transform:translate(-50%)}.term-tip:not(.term-tip--below) .term-tip__arrow{border-top-color:#1f2329;top:100%}.term-tip--below .term-tip__arrow{border-bottom-color:#1f2329;bottom:100%}.glossary-overlay{z-index:100;background:#00000052;justify-content:center;align-items:center;padding:24px;display:flex;position:fixed;inset:0}.glossary-card{background:var(--c-surface);width:100%;max-width:560px;max-height:80vh;box-shadow:var(--shadow-lg);border-radius:12px;padding:24px 28px;position:relative;overflow-y:auto}.glossary-card__close{cursor:pointer;color:var(--c-muted);background:0 0;border:none;border-radius:4px;padding:4px 8px;font-size:22px;line-height:1;position:absolute;top:12px;right:14px}.glossary-card__close:hover{color:var(--c-text);background:#f3f4f6}.glossary-card__name{color:var(--c-primary);margin-bottom:8px;font-size:20px;font-weight:700}.glossary-card__summary{color:var(--c-text-soft);background:var(--c-primary-soft);border-radius:var(--radius);margin-bottom:18px;padding:10px 14px;font-size:14px}.glossary-card__body h2{color:var(--c-text);margin:18px 0 6px;font-size:15px;font-weight:600}.glossary-card__body p,.glossary-card__body ul{color:var(--c-text);margin:8px 0;font-size:14px}.glossary-card__body ul{padding-left:20px}.glossary-card__empty{color:var(--c-muted);text-align:center;padding:20px 0}mark.hl-mark{background:var(--hl-current);color:inherit;cursor:pointer;border-radius:2px;padding:1px 0;transition:background .15s}mark.hl-mark:hover{background:var(--c-highlight-comment)}mark.hl-mark.has-comment{background:var(--c-highlight-comment);box-shadow:inset 0 -2px 0 0 var(--c-warn)}mark.hl-mark[data-color="1"]{background:var(--hl-1)}mark.hl-mark[data-color="2"]{background:var(--hl-2)}mark.hl-mark[data-color="3"]{background:var(--hl-3)}mark.hl-mark[data-color="4"]{background:var(--hl-4)}mark.hl-mark[data-color="1"].has-comment{background:var(--hl-1);box-shadow:inset 0 -2px 0 0 var(--c-warn)}mark.hl-mark[data-color="2"].has-comment{background:#c5e1f9;box-shadow:inset 0 -2px #1976d2}mark.hl-mark[data-color="3"].has-comment{background:#b8e6b8;box-shadow:inset 0 -2px #2e7d32}mark.hl-mark[data-color="4"].has-comment{background:#ffc1d8;box-shadow:inset 0 -2px #c2185b}mark.hl-mark[data-kind=comment]{border-bottom:2px dashed var(--c-primary);background:0 0;border-radius:0;padding:0;transition:border-bottom-color .15s,background 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