.lecture-header{margin-bottom:8px}.lecture-tag{display:inline-flex;align-items:center;gap:6px;background:var(--surface-pricing-featured);color:var(--brand-blue);font-size:13px;font-weight:600;padding:4px 12px;border-radius:var(--radius-full);margin-bottom:16px}.lecture-intro{font-size:16px;color:var(--slate);line-height:1.7;max-width:640px}.section{scroll-margin-top:88px;display:flex;flex-direction:column;gap:20px}.section-title{font-size:26px;font-weight:500;letter-spacing:-.3px;color:var(--ink)}.card-feature{border-radius:var(--radius-xxxl);padding:var(--space-xxl);color:var(--primary);font-size:16px;line-height:1.65}.no-toc .card-feature{font-size:18px;font-weight:500;line-height:1.5}.card-yellow{background-color:var(--brand-yellow)}.card-teal{background-color:var(--teal-light)}.card-rose{background-color:var(--rose-light)}.card-coral{background-color:var(--coral-light)}.tag-chip{display:inline-block;background:#fff9;padding:2px 10px;border-radius:4px;font-weight:700;font-size:12px;letter-spacing:.3px;text-transform:uppercase;margin-bottom:14px}.no-toc .tag-chip{padding:2px 8px;font-weight:600;font-size:14px;letter-spacing:0;text-transform:none;margin-bottom:12px}.card-base{background:var(--canvas);border:1px solid var(--hairline-soft);border-radius:var(--radius-xl);padding:var(--space-xl);box-shadow:#0500380a 0 1px 2px}.esep-grid{display:grid;grid-template-columns:1fr;gap:12px;font-size:16px}.esep-answer{background:var(--surface-pricing-featured);padding:12px;border-radius:8px;color:var(--brand-blue);font-weight:500;margin-top:8px}.badge-tag-purple,.badge-purple{background-color:var(--surface-pricing-featured);color:var(--brand-blue);font-size:13px;font-weight:600;padding:4px 10px;border-radius:var(--radius-full);display:inline-block;margin-bottom:16px}.badge-success{background-color:var(--success-accent);color:var(--canvas);font-size:13px;font-weight:600;padding:4px 10px;border-radius:var(--radius-full);display:inline-block;margin-bottom:16px}.badge-hard{display:inline-block;border-radius:var(--radius-full);padding:6px 10px;font-size:12px;font-weight:600;background:#ff999926;color:#b94141}.prose{font-size:16px;color:var(--slate);line-height:1.75}.prose+.prose{margin-top:-8px}.prose strong{color:var(--ink);font-weight:600}.teoria-text{font-size:16px;color:var(--slate);line-height:1.7}.note-box{background:var(--canvas);border:1px solid var(--hairline);border-left:3px solid var(--brand-coral);border-radius:0 var(--radius-lg) var(--radius-lg) 0;padding:14px 18px;font-size:15px;color:var(--slate);line-height:1.65}.note-box strong{color:var(--ink)}.alert-warning{margin-top:14px;padding:14px;border-radius:var(--radius-lg);background:#fff6d8;color:#6d4f00;border:1px solid #ffe399}.table-wrap,.comparison-table-wrapper{background:var(--canvas);border:1px solid var(--hairline);border-radius:var(--radius-lg);overflow-x:auto;overflow-y:hidden}table{width:100%;border-collapse:collapse;text-align:left;font-size:15px}th,td{padding:var(--space-md) var(--space-lg);border-bottom:1px solid var(--hairline-soft)}th{background:var(--surface);font-weight:500;color:var(--slate)}.page-wrap:not(.no-toc) th{font-size:13px}tr:last-child td{border-bottom:none}.visual-box{margin-top:20px;padding:20px;background:#fff6;border-radius:var(--radius-xl);display:flex;justify-content:center;align-items:center}.no-toc .visual-box{margin-top:24px;padding:24px}.visual-box.white,.white{background:var(--surface)}.conspec-card{background:var(--primary);border-radius:var(--radius-xxxl);padding:var(--space-xxl);color:#fff}.conspec-title{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--muted);margin-bottom:16px}.conspec-list{list-style:none;display:flex;flex-direction:column;gap:10px}.conspec-list li{font-size:15px;color:#d1d3da;line-height:1.55;display:flex;gap:10px}.conspec-list li:before{content:"–";color:var(--muted);flex-shrink:0}.conspec-list li strong{color:#fff}.styled-list{margin:0;padding-left:20px;line-height:1.7}.code-block{margin:0;background:#15181f;color:#e6e9ef;border-radius:var(--radius-lg);padding:14px 16px;overflow-x:auto;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;line-height:1.6;white-space:pre}.code-keyword{color:#7aa2f7}.code-function{color:#9ece6a}.code-string{color:#e0af68}.code-operator{color:#bb9af7}@media(max-width:640px){.lecture-intro{max-width:none}.section-title{font-size:21px}.card-feature,.no-toc .card-feature{padding:var(--space-lg);border-radius:var(--radius-xl);font-size:15px}.conspec-card{padding:var(--space-lg);border-radius:var(--radius-xl)}.visual-box,.no-toc .visual-box{padding:14px;margin-top:16px}.card-base{padding:var(--space-lg)}.code-block{font-size:13px;padding:12px 14px}}