*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:#333;background:#fff;line-height:1.9;font-size:17px}
.wrap{max-width:720px;margin:0 auto;padding:28px 18px 60px}
h1{font-size:24px;line-height:1.5;margin-bottom:10px;color:#1a1a1a}
.meta{font-size:13px;color:#999;margin-bottom:26px}
h2{font-size:19px;margin:26px 0 10px;color:#1a1a1a}
p{margin-bottom:16px;text-align:justify}
a{color:#2b6cb0;text-decoration:none}
a:hover{text-decoration:underline}
.tip{background:#f7f9fb;padding:12px 14px;border-radius:6px;font-size:15px;color:#555;margin-top:26px}
.foot{margin-top:40px;padding-top:16px;border-top:1px solid #eee;font-size:13px;color:#aaa}
@media (max-width:480px){body{font-size:16px}h1{font-size:21px}}