:root{--ink:#1b2434;--muted:#7d8796;--line:#e5e9ef;--purple:#6559ca;--bg:#f7f8fa;--green:#24836c;--red:#b95350}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}button,input,select{font:inherit}a{color:inherit;text-decoration:none}button,a,input,select{outline-offset:4px}button{cursor:pointer}header{height:78px;padding:0 42px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:10}.brand{display:flex;gap:12px;align-items:center;font-size:23px;font-weight:750;letter-spacing:-.8px}.brand svg{width:30px;height:30px;fill:var(--purple);transform:rotate(-12deg)}.brand small{font-size:12px;letter-spacing:.4px;color:var(--muted);font-weight:500;margin-left:14px;border-left:1px solid 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