html,body{max-width:100%;overflow-x:hidden}.preface-home{display:none!important}.standalone-ipa{cursor:default!important}.site-footer{padding:22px 14px 30px;text-align:center;color:#738097;font:12px/1.5 -apple-system,BlinkMacSystemFont,"PingFang SC",Arial,sans-serif}.site-footer p{margin:4px}.icp-link{color:#738097;text-decoration:none}.course-header .back-link,.station-nav a{min-height:44px;display:flex;align-items:center;justify-content:center}