确定要支持的设备，然后添加带有以下内容的样式表：

/* =Responsive Structure
----------------------------------------------- */
@media (max-width: 800px) {
       /* Smaller Resolution Desktops and Laptops */
       [...]
}
@media (max-width: 650px) {
       /* Smaller devices */
       [...]
}
@media (max-width: 450px) {
       /* Even Smaller devices */
       [...]
}
@media only screen and (min-device-width: 320px) and (max-device-width: 480px) {
       /* Even Smaller devices */
       [...]
}