:root{--bg:#f4f6fa;--ink:#1d2a40;--muted:#78869b;--line:#e8edf4;--blue:#4568ec;--nav:#152238;--gold:#d2ae6d;--green:#159675;--amber:#ae7b22}*{box-sizing:border-box}body{margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);font-size:13px}button,input,select,textarea{font:inherit}button,a,input,select,textarea{outline-color:var(--blue)}button{cursor:pointer}a{text-decoration:none;color:inherit}.sidebar{position:fixed;width:246px;height:100vh;background:var(--nav);color:#bdc8da;display:flex;flex-direction:column;z-index:20}.brand{display:flex;align-items:center;gap:12px;margin:27px 23px 23px;color:#fff;font-size:19px;font-weight:650;letter-spacing:2px}.brand small{display:block;font-weight:400;font-size:10px;letter-spacing:2.5px;margin-top:6px;color:#7f91af}.brand-mark{border:1px solid 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