:root{--bg:#F7F4FF;--surface:#fff;--soft:#EEF2FF;--title:#1B1340;--text:#2F2A4A;--muted:#5B5678;--subtle:#8B86A3;--purple:#7C3AED;--violet:#A78BFA;--teal:#14B8A6;--coral:#F97316;--pink:#E11D48;--amber:#F59E0B;--indigo:#312E81;--line:rgba(124,58,237,.14);--shadow:0 16px 40px rgba(49,46,129,.10);--radius:24px;--max:1200px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.8;overflow-x:hidden}a{color:inherit;text-decoration:none}button{font:inherit}img{display:block;max-width:100%;height:auto}a:focus-visible,button:focus-visible{outline:3px solid rgba(124,58,237,.35);outline-offset:3px}.site-main{padding:112px 16px 72px}.container{width:min(100%,var(--max));margin:auto}.site-header{position:relative;z-index:60}.desktop-brandbar{position:fixed;top:14px;left:50%;transform:translateX(-50%);width:min(calc(100% - 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