@media screen and (min-width:1080px){.box{ width: 1080px;}.content{width: 1040px;}.img{height:180px;}.img{font-size: 48px;line-height: 180px;}.title{font-size: 46px;line-height: 100px;}.detail{font-size: 20px;}}@media screen and (min-width: 900px) and (max-width: 1079px) {.box{ width: 900px; }.content{width: 860px;}.img{height:160px;}.img{font-size: 40px;line-height: 160px;}.title{font-size: 38px;line-height: 80px;}.detail{font-size: 17px;}}@media screen and (min-width: 768px) and (max-width: 899px) {.box{ width: 768px; }.content{width: 728px;}.img{height:140px;}.img{font-size: 32px;line-height: 140px;}.title{font-size: 30px;line-height: 60px;}.detail{font-size: 14px;}}@media only screen and (min-width: 480px) and (max-width: 767px){.box{ width: 480px; }.content{width: 440px; }.img{height:98px;}.img{font-size: 24px;line-height: 100px;}.title{font-size: 22px;line-height: 40px;}.detail{font-size: 11px;}}@media only screen and (max-width: 479px) {.box{ width: 300px; }.content{width: 300px;}.img{height:60px;}.img{font-size: 16px;line-height: 60px;}.title{font-size: 14px;line-height: 20px;}.detail{font-size: 8px;}}
HTML结构代码：
要是刚好在那个宽度上，如：屏幕宽度900，刚好
