:root{--ink:#23344b;--muted:#728097;--line:#e5eaf1;--blue:#356bd7;--pale:#eff5ff;--green:#1b846b;--amber:#a97620;--nav:#304155}*{box-sizing:border-box}body{margin:0;background:#f4f6fa;color:var(--ink);font:14px/1.75 "Microsoft YaHei","PingFang SC",Arial,sans-serif}button,input,a{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #8cbbff;outline-offset:3px}button{color:inherit}#sidebar{position:fixed;inset:0 auto 0 0;width:244px;background:var(--nav);color:#d5deeb;display:flex;flex-direction:column;z-index:20}.brand{height:83px;flex-shrink:0;display:flex;align-items:center;justify-content:center;background:#304155;border-bottom:1px solid #ffffff0e}.brand img{display:block;width:211px;height:58px;object-fit:contain}.side-intro{padding:17px 20px 10px;font-size:11px;color:#a3b4c9}.side-intro 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