.pf-grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fill,minmax(min(100%,280px),1fr))}.pf-card{display:flex;flex-direction:column;overflow:hidden;background:var(--color-surface);border:1px solid var(--color-line);border-radius:var(--radius-card);transition:border-color .15s ease,transform .15s ease}.pf-card:hover{border-color:var(--color-line-strong);transform:translateY(-2px)}@media(prefers-reduced-motion:reduce){.pf-card:hover{transform:none}}.pf-cover{position:relative;aspect-ratio:16 / 9;overflow:hidden;background:var(--color-primary-subtle)}.pf-cover img{width:100%;height:100%;object-fit:cover;display:block}.pf-cover-empty{display:grid;place-items:center;height:100%;padding:18px;text-align:center;color:var(--color-primary);font-weight:750;font-size:20px;line-height:1.2;letter-spacing:-.4px;background:linear-gradient(135deg,var(--color-primary-subtle),var(--color-primary-soft))}.pf-card-body{display:flex;flex:1;flex-direction:column;gap:8px;padding:16px 18px 18px}.pf-card-title{font-size:17px;font-weight:700;line-height:1.3;letter-spacing:-.2px;color:var(--color-ink)}.pf-card-summary{font-size:14px;line-height:1.55;color:var(--color-muted);display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden}.pf-card-foot{display:flex;align-items:center;gap:8px;margin-top:auto;padding-top:10px;font-size:13px;color:var(--color-muted)}.pf-card-foot .pf-likes{margin-left:auto;display:inline-flex;align-items:center;gap:4px}.pf-course-chip{align-self:flex-start;font-size:12px;font-weight:600;color:var(--color-primary);background:var(--color-primary-subtle);border-radius:999px;padding:3px 10px}.pf-avatar{flex:none;border-radius:999px;object-fit:cover;background:var(--color-primary-soft);color:var(--color-primary);display:inline-grid;place-items:center;font-weight:700}.pf-layout{display:grid;gap:40px}@media(min-width:1024px){.pf-layout{grid-template-columns:minmax(0,1fr) 300px;gap:56px}}.pf-aside{display:grid;gap:16px;align-content:start}@media(min-width:1024px){.pf-aside{position:sticky;top:92px}}.pf-verified{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:999px;background:var(--color-success-soft);color:var(--color-success-text);font-size:13px;font-weight:600}.pf-hero-img{overflow:hidden;border-radius:var(--radius-card);border:1px solid var(--color-line);background:var(--color-surface-2)}.pf-hero-img img{display:block;width:100%;height:auto;max-height:520px;object-fit:cover}.pf-summary{font-size:18px;line-height:1.65;color:var(--color-ink);border-left:3px solid var(--color-primary);padding-left:16px}.pf-toc{display:grid;gap:2px;font-size:14px}.pf-toc a{display:block;padding:6px 10px;border-left:2px solid var(--color-line);color:var(--color-muted)}.pf-toc a:hover{color:var(--color-ink)}.pf-toc a.is-active{color:var(--color-primary);border-left-color:var(--color-primary);font-weight:600}.pf-toc a[data-level="3"]{padding-left:22px}.pf-chips{display:flex;flex-wrap:wrap;gap:6px}.pf-chip{font-size:13px;padding:4px 10px;border-radius:999px;border:1px solid var(--color-line);background:var(--color-surface);color:var(--color-ink-soft)}.pf-aside .kg-share-main{flex-basis:100%}.pf-like[aria-pressed=true]{border-color:var(--color-primary);background:var(--color-primary-subtle);color:var(--color-primary)}.pf-prose{font-size:16.5px;line-height:1.78;color:var(--color-ink-soft);overflow-wrap:anywhere}.pf-prose>*+*{margin-top:1em}.pf-prose h2{margin-top:2.2em;font-size:23px;line-height:1.3;font-weight:750;letter-spacing:-.4px;color:var(--color-ink);scroll-margin-top:96px}.pf-prose h3{margin-top:1.8em;font-size:18px;font-weight:700;color:var(--color-ink);scroll-margin-top:96px}.pf-prose h4,.pf-prose h5,.pf-prose h6{margin-top:1.5em;font-weight:700;color:var(--color-ink)}.pf-prose strong{color:var(--color-ink)}.pf-prose a{color:var(--color-primary);text-decoration:underline;text-underline-offset:2px}.pf-prose ul{list-style:disc;padding-left:1.4em}.pf-prose ol{list-style:decimal;padding-left:1.4em}.pf-prose li+li{margin-top:.35em}.pf-prose blockquote{border-left:3px solid var(--color-primary);padding:4px 0 4px 16px;color:var(--color-ink);background:var(--color-primary-subtle);border-radius:0 10px 10px 0}.pf-prose hr{border:0;border-top:1px solid var(--color-line);margin:2em 0}.pf-prose :not(pre)>code{font-size:.9em;padding:2px 6px;border-radius:6px;background:var(--color-surface-2);color:var(--color-ink)}.pf-prose .kg-proj-img{display:block;width:100%;height:auto;border-radius:12px;border:1px solid var(--color-line);background:var(--color-surface-2)}.pf-prose .kg-proj-noimg{font-size:13px;color:var(--color-muted)}.pf-prose table{display:block;max-width:100%;overflow-x:auto;border-collapse:collapse;font-size:14.5px}.pf-prose th,.pf-prose td{border:1px solid var(--color-line);padding:8px 12px;text-align:left}.pf-prose th{background:var(--color-surface-2);color:var(--color-ink);font-weight:650}.pf-prose .kg-code{overflow:hidden;border-radius:12px;background:#13111f;color:#e8e6f3}.pf-prose .kg-code-bar{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:6px 8px 6px 14px;font-size:12px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;color:#a7a3c2;border-bottom:1px solid #2a2640}.pf-prose .kg-code-bar button{min-height:32px;padding:4px 10px;border-radius:8px;color:#e8e6f3;font-size:12px;font-family:var(--font-sans)}.pf-prose .kg-code-bar button:hover{background:#2a2640}.pf-prose pre{margin:0;padding:14px 16px;overflow-x:auto;font-size:13.5px;line-height:1.6}.pf-prose pre code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.pf-profile{display:grid;gap:22px;padding:28px;border-radius:24px;background:var(--color-surface);border:1px solid var(--color-line)}@media(min-width:768px){.pf-profile{grid-template-columns:auto minmax(0,1fr);padding:32px 36px}}.pf-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}@media(min-width:768px){.pf-stats{grid-template-columns:repeat(4,minmax(0,1fr))}}.pf-stat{padding:14px 16px;border-radius:14px;background:var(--color-surface-2)}.pf-stat strong{display:block;font-size:24px;font-weight:750;letter-spacing:-.6px;color:var(--color-ink)}.pf-stat span{font-size:13px;color:var(--color-muted)}.pf-editor{display:grid;gap:28px}@media(min-width:1100px){.pf-editor{grid-template-columns:minmax(0,1fr) 320px}}.pf-toolbar{display:flex;flex-wrap:wrap;gap:4px;padding:6px;border:1px solid var(--color-line);border-bottom:0;border-radius:12px 12px 0 0;background:var(--color-surface-2)}.pf-toolbar button,.pf-toolbar label{min-height:36px;min-width:36px;padding:4px 10px;border-radius:8px;font-size:13px;font-weight:600;color:var(--color-ink-soft);display:inline-flex;align-items:center;justify-content:center;gap:6px;cursor:pointer}.pf-toolbar button:hover,.pf-toolbar label:hover{background:var(--color-surface);color:var(--color-ink)}.pf-toolbar [aria-pressed=true]{background:var(--color-surface);color:var(--color-primary)}.pf-body-input{display:block;width:100%;min-height:60vh;resize:vertical;padding:16px 18px;border:1px solid var(--color-line);border-radius:0 0 12px 12px;background:var(--color-surface);color:var(--color-ink);font:14.5px/1.7 ui-monospace,SFMono-Regular,Menlo,monospace}.pf-body-input:focus{outline:2px solid var(--color-primary);outline-offset:-1px}.pf-preview{min-height:60vh;padding:20px 22px;border:1px solid var(--color-line);border-radius:0 0 12px 12px;background:var(--color-surface)}.pf-body-input.is-drop{outline:2px dashed var(--color-primary);outline-offset:-6px}.pf-thumbs{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.pf-thumb{position:relative;overflow:hidden;aspect-ratio:16 / 10;border-radius:10px;border:2px solid transparent;background:var(--color-surface-2)}.pf-thumb img{width:100%;height:100%;object-fit:cover}.pf-thumb[aria-pressed=true]{border-color:var(--color-primary)}.pf-savestate{font-size:13px;color:var(--color-muted)}