.site-return{display:flex;justify-content:space-between;align-items:center;gap:10px;background:#e6eee6;border-bottom:1px solid #d4e1d6;padding:10px max(18px,calc((100vw - 1100px)/2));font:12px/1.7 -apple-system,BlinkMacSystemFont,'Microsoft YaHei',sans-serif;color:#52705e}.site-return a{text-decoration:none;font-weight:600;color:#235842}.site-return span{font-size:10px;color:#7b8d7d}.phone-toggle,.phone-filter-summary{display:none}button,select,input,textarea{touch-action:manipulation}button:focus-visible,a:focus-visible{outline-offset:3px}body{-webkit-text-size-adjust:100%}body[data-app=quiz] .layout{min-width:0}body[data-app=quiz] #grid button{min-width:0}body[data-app=quiz] #source{padding:0 5px}body[data-app=quiz] img{max-width:100%}body[data-app=quiz] footer button{white-space:nowrap}
@media(max-width:750px){body[data-app=quiz] header{padding:18px}body[data-app=quiz] header h1{font-size:21px}body[data-app=quiz] header p{font-size:11px;line-height:1.8}body[data-app=quiz] .layout{margin:15px auto;padding:0 12px;gap:13px}body[data-app=quiz] .panel{padding:14px}body[data-app=quiz] .panel>strong{font-size:13px}body[data-app=quiz] .phone-toggle{display:block;width:100%;padding:9px;margin-top:10px;font-size:12px;color:#316c50;background:#edf4eb}body[data-app=quiz] .phone-filter-summary{display:block;font-size:11px;line-height:1.8;color:#7a897c;margin:9px 0 0}body[data-app=quiz] .panel:not(.phone-expanded) .stats,body[data-app=quiz] .panel:not(.phone-expanded) .grid,body[data-app=quiz] .panel:not(.phone-expanded)>p.note,body[data-app=quiz] .panel:not(.phone-expanded) .controls>:not(#subject){display:none}body[data-app=quiz] .controls{margin-top:9px}body[data-app=quiz] .controls select{font-size:16px;padding:9px;max-width:100%}body[data-app=quiz] .grid{grid-template-columns:repeat(7,minmax(0,1fr));max-height:190px}body[data-app=quiz] .grid button{min-height:38px}body[data-app=quiz] .card{padding:16px 13px}body[data-app=quiz] .meta{font-size:11px;gap:8px}body[data-app=quiz] .stemText{font-size:17px;line-height:1.95}body[data-app=quiz] .options{gap:8px}body[data-app=quiz] .options button{min-height:45px;min-width:44px}body[data-app=quiz] textarea,body[data-app=quiz] #sequenceInput{font-size:16px}body[data-app=quiz] footer{font-size:11px}body[data-app=quiz] footer button{padding:9px 11px;font-size:13px}body[data-app=quiz] .result{font-size:14px}body[data-app=math] input,body[data-app=math] select,body[data-app=math] textarea,body[data-app=mechanics] input[type=search],body[data-app=mechanics] select,body[data-app=mechanics] textarea{font-size:16px}body[data-app=math] #chapterFilter,body[data-app=mechanics] #chapter{font-size:13px}body[data-app=mechanics] #search{font-size:13px}body[data-app=math] #search{max-width:100%}body[data-app=mechanics] #outline{display:block;max-height:145px}.site-return{padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right))}}