.lecture-hero{padding:168px 0 34px;position:relative;overflow:hidden}.lecture-hero:before{content:"";position:absolute;top:-190px;inset-inline-end:-170px;width:620px;height:620px;border-radius:50%;background:radial-gradient(circle,var(--g-accent-rgb-013),transparent 65%);pointer-events:none}.lecture-hero>.container{position:relative;z-index:1}.lecture-crumbs{display:flex;align-items:center;gap:10px;font-family:var(--font-assistant),sans-serif;font-size:.84rem;font-weight:700;letter-spacing:.1em;color:var(--ink-soft);margin-bottom:20px}.lecture-crumbs a{color:var(--accent-strong);text-decoration:none}.lecture-crumbs a:focus-visible,.lecture-crumbs a:hover{text-decoration:underline}.lecture-hero h1{font-size:clamp(2rem,4.6vw,3.2rem);font-weight:900;line-height:1.12;letter-spacing:-.01em;margin-bottom:20px}.lecture-h1-sub{display:block;margin-top:12px;font-family:var(--font-assistant),sans-serif;font-size:clamp(.95rem,1.6vw,1.1rem);font-weight:700;letter-spacing:.02em;color:var(--accent-strong)}.lecture-lead{color:var(--ink-soft);max-width:680px;font-size:1.12rem;line-height:1.85;margin-bottom:28px}.lecture-hero-actions{display:flex;flex-wrap:wrap;gap:14px}.lecture-photo{padding:0 0 clamp(30px,4vw,52px)}.lecture-photo-figure{margin:0;max-width:1000px}.lecture-photo-figure img{display:block;width:100%;height:auto;border-radius:clamp(12px,1.6vw,18px);border:1px solid var(--line,#e2e6ec);box-shadow:0 1px 2px rgba(17,24,38,.06),0 26px 52px -34px rgba(17,24,38,.55)}.lecture-photo-figure figcaption{margin-top:12px;color:var(--ink-soft,#5a6575);font-size:.95rem;line-height:1.7}@media (max-width:700px){.lecture-photo-figure img{aspect-ratio:4/3;object-fit:cover;object-position:26% center}}.lecture-facts-section{padding:clamp(8px,1.5vw,18px) 0 clamp(40px,5vw,64px)}.lecture-facts-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}.lecture-fact-card{background:var(--card);border:1px solid rgba(var(--shade-rgb),.1);border-radius:var(--radius-lg);padding:30px 28px;box-shadow:var(--shadow-warm)}.lecture-fact-card h2{font-family:var(--font-assistant),sans-serif;font-weight:800;font-size:.86rem;letter-spacing:.12em;color:var(--accent-strong);margin-bottom:10px}.lecture-fact-card p{color:var(--ink-soft);font-size:1.02rem;line-height:1.8}.lecture-format{padding:clamp(44px,5.5vw,74px) 0;background:var(--bg-soft);border-block:1px solid var(--line)}.lecture-format-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(28px,4vw,56px)}.lecture-format .section-title{font-size:clamp(1.45rem,2.4vw,1.85rem);margin-bottom:12px}.lecture-format p{color:var(--ink-soft);font-size:1.02rem;line-height:1.85;margin-bottom:14px}.lecture-siblings{padding:clamp(46px,6vw,78px) 0}.lecture-siblings .section-title{margin-bottom:26px}.lecture-siblings-list{list-style:none;margin:0 0 26px;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:14px}@media (max-width:980px){.lecture-siblings-list{grid-template-columns:repeat(2,1fr)}}@media (max-width:620px){.lecture-siblings-list{grid-template-columns:1fr}}.lecture-siblings-list a{display:block;height:100%;padding:20px 22px;border:1px solid rgba(var(--shade-rgb),.12);border-radius:16px;background:var(--card);text-decoration:none;transition:border-color .18s ease,transform .18s ease,box-shadow .18s ease}.lecture-siblings-list a:focus-visible,.lecture-siblings-list a:hover{border-color:rgba(var(--accent-rgb),.45);transform:translateY(-3px);box-shadow:var(--shadow-warm)}.lecture-sibling-topic{display:block;font-family:var(--font-assistant),sans-serif;font-size:.78rem;font-weight:700;letter-spacing:.12em;color:var(--accent-strong);margin-bottom:6px}.lecture-sibling-title{display:block;font-weight:800;font-size:1.12rem;line-height:1.4;color:var(--ink)}@media (max-width:860px){.lecture-facts-grid,.lecture-format-grid{grid-template-columns:1fr}.lecture-hero{padding-top:136px}.lecture-fact-card{padding:26px 22px}}