- --font-display leads with "Jyotisha Serif SC", then exactly the body sans stack; no system 宋体 or generic serif (BUG-737 guards kept). - serif-sc.css imported from site-styles.ts beside globals.css (root layout also serves admin); swap, no preload. - Long-form report title (.personal-report-md-article h1) takes the heading face; deliberate sans headings pinned by a new contract test. - font-stack-loadable-contract: loadable now includes self-hosted @font-face with existing files; "no CJK serif" replaced by "leads with Jyotisha Serif SC, never a system 宋体" (brief T3). - DESIGN §3, BUG-737 note, CHANGELOG, device checklist, PROGRESS. TASK-serif-headings-20260928 T2-T5. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_0199rbQDTsUbCVw84wc8BTFe