.lesson-game [hidden]{display:none!important}
.lesson-game body>header{height:78px;gap:16px}
.lesson-game header>.brand,.lesson-game .header-right>span,.lesson-game .collection-nav,.lesson-game .pond-head>a,.lesson-game body>footer{display:none!important}
.lesson-game .lesson-return{color:#274e44;font:600 16px/1.6 'Microsoft YaHei',sans-serif;text-decoration:none;letter-spacing:.4px;padding:10px 0}
.lesson-game .lesson-return:hover{text-decoration:underline}
.lesson-game .header-right{margin-left:auto;gap:16px}
.lesson-game main{padding-top:26px}
.lesson-game .lesson-finish-return{display:block;margin:16px auto 0;padding:12px 18px;color:#315b47;font-size:15px;text-underline-offset:4px}
@media(max-width:720px){.lesson-game body>header{height:auto;min-height:74px;flex-wrap:wrap;padding:12px 0;gap:9px}.lesson-game .lesson-return{font-size:14px}.lesson-game .header-right{gap:10px}.lesson-game #sound{font-size:12px;padding:9px 11px}.lesson-game main{padding-top:18px}}