.group_1 background #1a78f3 // 兼容不显示渐变色的浏览器 background: linear-gradient(180deg, #1a78f3 , #fff); background:-moz-linear-gradient(180deg, #1a78f3 , #fff); background:-webkit-linear-gradient(180deg, #1a78f3 , #fff); background:-o-linear-gradient(180deg…