*{margin:0;padding:0;box-sizing:border-box}body{font-family:PingFang SC,Microsoft YaHei,sans-serif;overflow:hidden;touch-action:none;-webkit-user-select:none;user-select:none;background:linear-gradient(to bottom,#87CEEB,#E0F7FA);height:100vh;width:100vw}button{cursor:pointer;border:none;outline:none;padding:10px 20px;border-radius:5px;font-weight:700;background-color:#ff8c00;color:#fff;font-size:18px;transition:transform .1s,background-color .3s}button:hover{background-color:orange}button:active{transform:scale(.95)}