:root{--bg:#F5F3EE;--card:#fff;--soft:#EEF1F4;--ink:#20262F;--text:#3E4752;--muted:#707986;--deep:#253544;--accent:#A85E4D;--sand:#E7DFD2;--line:#DDD9D1;--footer:#202934}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.78;overflow-wrap:anywhere}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline;text-underline-offset:4px}img{display:block;max-width:100%;height:auto;object-fit:contain;object-position:center}.shell{width:min(1180px,calc(100% - 64px));margin:auto;min-width:0}.site-header{background:rgba(245,243,238,.97);border-bottom:1px solid var(--line)}.brand-row{min-height:68px;display:grid;grid-template-columns:auto 1fr auto;gap:28px;align-items:center}.brand{display:flex;align-items:center;min-width:0}.brand img{max-height:30px;width:auto;max-width:180px}.brand 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