1,方案一:响应式来做,可以根据媒体查询,设定在不同屏幕宽度下div的高度和宽度,具体的设置看你响应式想怎么显示 @media only screen and (min-width: 100px) and (max-width: 640px) { div{ width: 100px; height: 100px; } } @media only screen and (min-width: 641px) and (max-width: 789px) { div{ width: 200px; he