.about-root{--accent:#e3b341;--accent-ink:#2e2106;--paper:#0c1226;--paper-2:#0d1530;--ink:#ede9dc;--ink-soft:hsla(46,32%,90%,.64);--ink-faint:hsla(46,32%,90%,.38);--edge:hsla(0,0%,100%,.08);--flip-dur:720ms;position:relative;min-height:100vh;width:100%;overflow:hidden;display:flex;align-items:center;justify-content:center;padding:28px 16px;background:#050a18;color:var(--ink);font-family:inherit}:global(.light) .about-root,:global(html:not(.dark)) .about-root{--paper:#fff;--accent:#b07f1a;--accent-ink:#fff;--paper-2:#f6f8ff;--ink:#0f172a;--ink-soft:rgba(15,23,42,.66);--ink-faint:rgba(15,23,42,.4);--edge:rgba(15,23,42,.1);background:#eef2ff}.bk-font-compact .bk-ol li,.bk-font-compact .bk-p,.bk-font-compact .bk-ul li{font-size:12.5px}.bk-font-compact .bk-h1{font-size:24px}.bk-font-compact .bk-h3{font-size:14px}.bk-font-large .bk-ol li,.bk-font-large .bk-p,.bk-font-large .bk-ul li{font-size:15.5px}.bk-font-large .bk-h1{font-size:32px}.bk-font-large 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14%,transparent);border-color:color-mix(in srgb,var(--accent) 55%,transparent);transform:translateY(-1px)}.bk-linkcard-inner{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}.bk-linkcard-label{font-size:12.5px;font-weight:800;color:var(--ink)}.bk-linkcard-desc{font-size:11px;color:var(--ink-soft);line-height:1.4}.bk-linkcard-icon{flex-shrink:0;color:var(--accent)}.bk-finalcta{display:flex;flex-direction:column;gap:8px;margin-top:4px}.bk-finalcta-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 18px;border-radius:12px;font-size:13px;font-weight:800;text-decoration:none;transition:all .22s}.bk-finalcta-btn--primary{color:var(--accent-ink);background:linear-gradient(135deg,var(--accent),#c9952c);box-shadow:0 10px 28px color-mix(in srgb,var(--accent) 40%,transparent)}.bk-finalcta-btn--primary:hover{transform:translateY(-2px);box-shadow:0 16px 36px color-mix(in srgb,var(--accent) 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40%,transparent);flex-shrink:0}.bk-toc-title{font-size:18px;font-weight:900;letter-spacing:-.02em;color:var(--ink);line-height:1.15}.bk-toc-sub{font-size:12px;color:var(--ink-faint);font-weight:600;margin-top:2px}.bk-toc-blurb{font-size:13.5px;line-height:1.7;color:var(--ink-soft);margin:0}.bk-toc-meta{display:flex;flex-wrap:wrap;gap:12px}.bk-toc-meta span{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:600;color:var(--ink-soft)}.bk-toc-hint{font-size:10.5px;color:var(--ink-faint);font-style:italic;margin-top:4px}.bk-page--toc{justify-content:flex-start}.bk-toc-list{display:flex;flex-direction:column;gap:4px}.bk-toc-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;border:1px solid transparent;background:color-mix(in srgb,var(--paper-2) 60%,transparent);cursor:pointer;transition:all .18s;text-align:left}.bk-toc-item:hover{border-color:color-mix(in srgb,var(--accent) 40%,transparent);background:color-mix(in srgb,var(--accent) 8%,transparent);transform:translateX(3px)}.bk-toc-num{flex-shrink:0;width:28px;font-size:12px;font-weight:900;color:var(--accent);display:inline-flex;align-items:center}.bk-toc-name{flex:1;font-size:13px;font-weight:700;color:var(--ink)}.bk-toc-time{display:inline-flex;align-items:center;gap:3px;font-size:10px;font-weight:600;color:var(--ink-faint);white-space:nowrap}.bk-toc-arrow{color:var(--ink-faint);flex-shrink:0}.bk-toc-item--gloss .bk-toc-name{color:var(--ink-soft)}.bk-page--slider{padding:22px;justify-content:center}.bk-slider{display:flex;flex-direction:column;gap:10px;height:100%}.bk-slider-stage{position:relative;flex:1;border-radius:16px;overflow:hidden;min-height:280px}.bk-slide{position:absolute;inset:0;opacity:0;transition:opacity .6s ease}.bk-slide--active{opacity:1}.bk-slide-ph{height:100%;flex-direction:column;align-items:center;gap:10px;color:hsla(0,0%,100%,.85);font-size:13px;font-weight:700;text-align:center;padding:18px;background:linear-gradient(150deg,color-mix(in srgb,var(--tint) 55%,#0a1026),color-mix(in srgb,var(--tint) 18%,#0a1026))}.bk-slide-ph,.bk-slider-dots{display:flex;justify-content:center}.bk-slider-dots{gap:6px}.bk-slider-dot{width:7px;height:7px;border-radius:50%;border:none;background:var(--edge);cursor:pointer;transition:all .3s;padding:0}.bk-slider-dot--active{width:22px;border-radius:4px;background:var(--accent)}.bk-slider-labels{display:flex;flex-direction:column;gap:3px}.bk-slider-cap{font-size:10.5px;color:var(--ink-faint);text-align:center;margin:0;font-style:italic}.bk-gloss-list{gap:11px}.bk-gloss-item,.bk-gloss-list{display:flex;flex-direction:column}.bk-gloss-item{gap:3px;padding-bottom:11px;border-bottom:1px solid var(--edge)}.bk-gloss-item:last-child{border-bottom:none}.bk-gloss-term{font-size:13.5px;font-weight:800;color:var(--accent)}.bk-gloss-def{font-size:12px;line-height:1.6;color:var(--ink-soft)}.bk-page--final-a{justify-content:center;align-items:center;text-align:center;gap:18px;background:linear-gradient(160deg,color-mix(in srgb,var(--accent) 12%,var(--paper)),var(--paper) 60%)}.bk-final-mark{width:56px;height:56px;border-radius:18px;display:grid;place-items:center;background:linear-gradient(140deg,var(--accent),#c9952c);color:#fff;box-shadow:0 14px 36px color-mix(in srgb,var(--accent) 40%,transparent)}.bk-final-title{font-size:26px;font-weight:900;letter-spacing:-.03em;color:var(--ink)}.bk-final-body{font-size:13.5px;line-height:1.72;color:var(--ink-soft);max-width:340px;margin:0}.bk-page--final-b{justify-content:center;gap:16px}.bk-final-next-label{font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.14em;color:var(--ink-faint);text-align:center}.bk-final-next-grid{display:flex;flex-direction:column;gap:9px}.bk-final-next-card{display:flex;align-items:flex-start;gap:13px;padding:14px 16px;border-radius:14px;text-decoration:none;border:1px solid var(--edge);background:color-mix(in srgb,var(--paper-2) 60%,transparent);transition:all .22s}.bk-final-next-card:hover{border-color:color-mix(in srgb,var(--accent) 45%,transparent);background:color-mix(in srgb,var(--accent) 10%,transparent);transform:translateX(4px)}.bk-final-next-card--primary{border-color:color-mix(in srgb,var(--accent) 35%,transparent);background:color-mix(in srgb,var(--accent) 12%,transparent)}.bk-final-next-card svg{flex-shrink:0;color:var(--accent);margin-top:2px}.bk-final-next-card-title{display:block;font-size:13.5px;font-weight:800;color:var(--ink)}.bk-final-next-card-sub{display:block;font-size:11px;color:var(--ink-soft);margin-top:2px}.bk-drawer{position:absolute;top:50px;left:0;z-index:30;width:280px;max-width:80%;max-height:72%;overflow-y:auto;border-radius:16px;background:color-mix(in srgb,var(--paper-2) 96%,transparent);border:1px solid var(--edge);box-shadow:0 30px 70px rgba(0,0,0,.5);-webkit-backdrop-filter:blur(22px);backdrop-filter:blur(22px);animation:bkDrawerIn .22s ease both}@keyframes bkDrawerIn{0%{opacity:0;transform:translateX(-10px)}to{opacity:1;transform:translateX(0)}}.bk-drawer-head{display:flex;align-items:center;justify-content:space-between;padding:13px 15px;font-size:12.5px;font-weight:800;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-soft);border-bottom:1px solid var(--edge)}.bk-drawer-list{padding:9px;display:flex;flex-direction:column;gap:3px}.bk-drawer-item{display:flex;align-items:center;gap:10px;padding:9px 11px;border-radius:9px;border:none;background:transparent;cursor:pointer;transition:all .18s;text-align:left}.bk-drawer-item:hover{background:color-mix(in srgb,var(--accent) 10%,transparent)}.bk-drawer-item--active{background:color-mix(in srgb,var(--accent) 14%,transparent)}.bk-search{position:fixed;inset:0;z-index:60;display:flex;align-items:flex-start;justify-content:center;padding:12vh 16px 0;background:rgba(2,6,16,.72);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);animation:bkFade .18s ease both}@keyframes bkFade{0%{opacity:0}to{opacity:1}}.bk-search-box{width:100%;max-width:560px;border-radius:18px;overflow:hidden;background:color-mix(in srgb,var(--paper-2) 98%,transparent);border:1px solid var(--edge);box-shadow:0 40px 90px rgba(0,0,0,.6)}.bk-search-input-row{display:flex;align-items:center;gap:10px;padding:14px 15px;border-bottom:1px solid var(--edge);color:var(--ink-soft)}.bk-search-input{flex:1;background:transparent;border:none;outline:none;font-size:15px;color:var(--ink);font-family:inherit}.bk-search-input::-moz-placeholder{color:var(--ink-faint)}.bk-search-input::placeholder{color:var(--ink-faint)}.bk-search-results{max-height:50vh;overflow-y:auto;padding:7px}.bk-search-empty{font-size:13px;color:var(--ink-faint);text-align:center;padding:18px;margin:0}.bk-search-result{width:100%;display:flex;flex-direction:column;gap:3px;padding:10px 12px;border-radius:10px;border:none;background:transparent;cursor:pointer;transition:background .16s;text-align:left}.bk-search-result:hover{background:color-mix(in srgb,var(--accent) 10%,transparent)}.bk-search-result-ch{font-size:10px;font-weight:800;text-transform:uppercase;letter-spacing:.06em;color:var(--accent)}.bk-search-result-snip{font-size:12.5px;line-height:1.5;color:var(--ink-soft)}@media (max-width:860px){.bk-spread{grid-template-columns:1fr;min-height:480px}.bk-page{padding:24px 20px}.bk-chtitle-name,.bk-h1{font-size:23px}.bk-rail{display:none}.bk-nav{position:absolute;bottom:-54px;z-index:5}.bk-nav--prev{left:28%}.bk-nav--next{right:28%}.bk-stage{padding-bottom:56px}.bk-toolbar-chapter{font-size:10.5px}.bk-font-switcher{display:none}}@media (prefers-reduced-motion:reduce){.bk-cover-foil,.bk-cover-wrap,.bk-drawer,.bk-focus-overlay,.bk-reader,.bk-search,.bk-slide{animation:none!important;transition:none!important}.bk-flip--m-next,.bk-flip--m-prev,.bk-flip--next,.bk-flip--prev{animation-duration:.01ms!important}.bk-flip-shadow{display:none!important}.bk-cover-wrap--closing .bk-cover,.bk-cover-wrap--opening .bk-cover,.bk-reader--closing,.bk-reader--opening{animation-duration:.01ms!important}}