:root{--pc-bg-body:#f5f5f7;--pc-bg-surface:#ffffff;--pc-bg-sidebar:#f8f9fb;--pc-border-color:#d9dce3;--pc-text-primary:#1f2328;--pc-text-secondary:#5b5f6b;--pc-accent:#1f2328;--pc-accent-soft:rgba(31,35,40,0.08);--pc-radius-lg:12px;--pc-radius-md:8px;--pc-radius-sm:4px;--pc-shadow-elevated:0 16px 32px rgba(15,23,42,0.06)}.pc-root{min-height:100vh;background:var(--pc-bg-body);color:var(--pc-text-primary)}.pc-top-bar{position:sticky;top:0;z-index:20;justify-content:space-between;padding:0 32px;height:64px;background:var(--pc-bg-sidebar);border-bottom:1px solid var(--pc-border-color)}.pc-brand,.pc-top-bar{display:flex;align-items:center}.pc-brand{gap:12px;font-weight:600;font-size:20px}.pc-top-nav{display:flex;gap:20px}.pc-top-link{font-size:14px;color:var(--pc-text-secondary);text-decoration:none;padding:6px 0;border-bottom:2px solid transparent;transition:color .2s ease,border-color .2s ease}.pc-top-link.is-active,.pc-top-link:hover{color:var(--pc-text-primary)}.pc-top-link.is-active{border-color:var(--pc-accent)}.pc-layout{display:grid;grid-template-columns:280px minmax(0,1fr) 240px;min-height:calc(100vh - 64px)}.pc-sidebar{background:var(--pc-bg-body);border-right:1px solid var(--pc-border-color);padding:32px 24px;overflow-y:auto}.pc-sidebar-section-title{font-size:12px;font-weight:600;color:var(--pc-text-secondary);text-transform:uppercase;letter-spacing:.08em;margin-bottom:16px}.pc-sidebar-list{list-style:none;margin:0;padding:0;display:grid;gap:8px}.pc-sidebar-link{display:block;padding:10px 14px;border-radius:var(--pc-radius-md);text-decoration:none;border:1px solid transparent;background:transparent;transition:background .2s ease,border-color .2s ease,color .2s ease}.pc-sidebar-link-title{display:block;font-size:14px;font-weight:600;color:var(--pc-text-primary)}.pc-sidebar-link-description{display:block;margin-top:4px;font-size:12px;color:var(--pc-text-secondary);line-height:1.5}.pc-sidebar-link:hover{background:rgba(31,35,40,.04);border-color:rgba(31,35,40,.1)}.pc-sidebar-link-active{border-color:transparent;background:rgba(31,35,40,.85)}.pc-sidebar-link-active .pc-sidebar-link-description,.pc-sidebar-link-active .pc-sidebar-link-title{color:#ffffff}.pc-content{background:var(--pc-bg-surface);padding:48px 64px;overflow-y:auto}.pc-content-inner{max-width:940px;margin:0 auto;padding-bottom:96px}.pc-content-inner article{display:grid;gap:48px}.pc-next-link{display:none;margin-top:64px;padding-top:32px;border-top:1px solid var(--pc-border-color)}.pc-next-link-label{display:block;font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--pc-text-secondary)}.pc-next-link-anchor,.pc-next-link-title{font-size:16px;font-weight:600;color:var(--pc-text-primary)}.pc-next-link-anchor{display:inline-flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 14px;border-radius:var(--pc-radius-md);background:rgba(31,35,40,.08);text-decoration:none;width:100%}.pc-next-link-anchor:hover{background:rgba(31,35,40,.12)}.pc-next-link-text{display:flex;flex-direction:column;gap:4px}.pc-next-link-icon{font-size:18px;line-height:1}.pc-content-inner h1{font-size:clamp(32px,4vw,44px);line-height:1.2;font-weight:700;margin:0}.pc-content-inner h2{font-size:clamp(20px,2.4vw,28px);font-weight:600;margin-bottom:16px;color:var(--pc-text-primary)}.pc-section-body{display:grid;gap:16px;color:var(--pc-text-secondary);font-size:16px;line-height:1.7}@media (max-width:1024px){.pc-layout{grid-template-columns:220px minmax(0,1fr)}.pc-toc{display:none}}@media (max-width:768px){.pc-layout{grid-template-columns:1fr}.pc-sidebar{display:none}.pc-content{padding:32px 24px}.pc-top-bar{padding:0 20px}.pc-next-link{display:block}}.pc-panel-card{background:#ffffff;border:1px solid var(--pc-border-color);border-radius:var(--pc-radius-md);padding:24px;box-shadow:var(--pc-shadow-elevated)}.pc-panel-card h3{margin:0;font-size:16px;font-weight:600;color:var(--pc-text-primary)}.pc-panel-card p{margin:12px 0 0;font-size:14px;color:var(--pc-text-secondary);line-height:1.6}.pc-toc{background:var(--pc-bg-surface);border-left:1px solid var(--pc-border-color);padding:32px 24px;overflow-y:auto}.pc-toc-header{font-size:14px;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--pc-text-secondary);margin-bottom:16px}.pc-toc-list{list-style:none;margin:0;padding:0;display:grid;gap:8px}.pc-toc-link{display:block;padding:8px 12px;border-radius:var(--pc-radius-md);text-decoration:none;color:var(--pc-text-secondary);font-size:14px;transition:background .2s ease,color .2s ease}.pc-toc-link:hover{background:rgba(31,35,40,.06);color:var(--pc-text-primary)}.pc-toc-link span{display:block;font-size:12px;color:#8b8f99;margin-top:4px}.pc-toc-empty{font-size:13px;color:var(--pc-text-secondary)}.pc-section{display:grid;gap:16px}.pc-section+.pc-section{border-top:1px solid var(--pc-border-color);padding-top:40px}.pc-section:first-of-type{padding-top:0}.pc-badge{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;padding:4px 12px;font-size:12px;font-weight:600;letter-spacing:.04em;background:rgba(31,35,40,.08);color:var(--pc-text-secondary)}.pc-horizontal-rule{height:1px;background:var(--pc-border-color);width:100%}.pc-stack{display:grid;gap:16px}.pc-stack h3{margin:0;font-size:18px;font-weight:600;color:var(--pc-text-primary)}.pc-stack p{margin:8px 0 0}.pc-list,.pc-stack p{font-size:15px;line-height:1.7;color:var(--pc-text-secondary)}.pc-list{margin:0;padding-left:20px}.pc-list li+li{margin-top:8px}.pc-section-note{font-size:14px;color:var(--pc-text-secondary)}.pc-sidebar-callout{margin-top:40px;padding:20px;background:rgba(31,35,40,.05);border-radius:var(--pc-radius-md);font-size:13px;color:var(--pc-text-secondary);line-height:1.6}.pc-sidebar-callout strong{color:var(--pc-text-primary)}.pc-toc-footer{margin-top:32px}.pc-toc-footer p{margin:0;font-size:13px;color:var(--pc-text-secondary);line-height:1.6}.pc-link-inline{color:var(--pc-accent);font-weight:500;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:4px}.pc-hero-intro{display:grid;gap:16px}.pc-hero-intro p{margin:0;font-size:17px}.pc-hero-intro p,.pc-summary{line-height:1.8;color:var(--pc-text-secondary)}.pc-summary{font-size:16px}