@import "https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;600;700;800&display=swap";
:root{--blue:#2854d8;--navy:#152c52;--text:#26364e;--muted:#718097;--line:#e8edf4;--bg:#f6f8fc;--white:#fff}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:Noto Sans SC,Microsoft YaHei,sans-serif;font-size:14px;line-height:1.65}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline-offset:4px;outline:3px solid #91aafa}button{color:inherit}svg{flex-shrink:0}header.topbar{border-bottom:1px solid var(--line);background:#fff;align-items:center;gap:44px;height:89px;padding:0 4%;display:flex}.brand{flex-shrink:0;align-items:center;gap:11px;display:flex}.brand-mark{background:var(--blue);color:#fff;border-radius:13px 13px 13px 3px;place-items:center;width:43px;height:43px;display:grid}.brand strong{letter-spacing:1px;font-size:24px;font-weight:800;line-height:1.2}.brand strong span{letter-spacing:2px;color:var(--muted);margin-top:5px;font-size:10px;font-weight:500;display:block}.topbar nav{gap:32px;margin:auto;display:flex}.topbar nav a{font-weight:500}.topbar nav a:hover,.api-link:hover{color:var(--blue)}.api-link{border:1px solid var(--line);border-radius:8px;align-items:center;gap:8px;padding:9px 13px;font-size:13px;display:flex}.site-wrap{grid-template-columns:220px minmax(0,1fr);max-width:1560px;margin:auto;display:grid}.sidebar{border-right:1px solid var(--line);padding:35px 20px 30px 25px}.side-caption{color:#8793a6;margin:0 0 18px 13px;font-size:11px}.categories{gap:5px;display:grid}.categories button,.free-button,.side-guide{text-align:left;background:0 0;border:0;border-radius:8px;align-items:center;gap:12px;width:100%;padding:13px 11px;font-size:13px;display:flex}.categories button>span{color:#93a0b3;margin-left:auto;font-size:11px}.categories button.active,.free-button.active{color:var(--blue);background:#e8eefc;font-weight:600}.categories 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