body{max-width:860px;margin:0 auto;padding:24px 18px 64px;font:16px/1.75 -apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:#1f2328;background:#f6f4ef}
a{color:#b5651d}h1,h2,h3{line-height:1.35}h1{font-size:1.6em}
table{border-collapse:collapse;display:block;overflow-x:auto;margin:1em 0}th,td{border:1px solid #e4e0d6;padding:6px 10px;vertical-align:top}th{background:#f6ebdf}
pre{background:#fff;border:1px solid #e4e0d6;padding:12px;overflow-x:auto}code{font-size:.92em}
blockquote{margin:1em 0;padding:.2em 1em;border-left:4px solid #e4e0d6;color:#555}
.back{display:inline-block;margin-bottom:12px;font-size:14px}