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  --brand:#6D28D9;--brand-soft:#A78BFA;--ink:#27242D;--muted:#716B78;--dark:#17151C;--bg:#F7F5FA;--soft:#ECE8F2;--accent:#F59E0B;--white:#fff;--line:#d8d2df;--max:1200px;--radius:22px;--shadow:0 18px 50px rgba(23,21,28,.08);--font:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.75;overflow-x:hidden}img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none}button,input{font:inherit}.shell{width:min(var(--max),calc(100% - 40px));margin-inline:auto}.skip-link{position:fixed;left:16px;top:-80px;z-index:9999;background:var(--dark);color:#fff;padding:10px 14px;border-radius:8px}.skip-link:focus{top:12px}.site-header{position:sticky;top:0;z-index:80;background:rgba(247,245,250,.96);backdrop-filter:blur(14px);border-bottom:1px solid rgba(113,107,120,.16)}.header-inner{min-height:78px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:24px}.brand-mark{display:flex;align-items:center;gap:12px}.brand-mark img{width:48px;height:48px;object-fit:contain;border-radius:12px}.brand-mark span{display:grid;line-height:1.2}.brand-mark 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