Revert "Revert "添加了歌曲信息、歌词，修改了背景，响应式和兼容性""

This reverts commit 6b7ecbb1c6068e92c4eb4b1251725b81bb2fbd24.

	modified:   css/style.css
	modified:   images/bgimg.jpg
	modified:   index.html
	modified:   list.php
	modified:   player.php
Revert "追加说明"

This reverts commit 5c420ee382fac77cbaa9823e1f6d1bda1a3f00c0.