.adver{width:1200px;margin:0 auto;}
.adver a img {width:1200px;margin-top:5px;border:0;}
.index_solution{width:1200px;margin:0 auto;margin-top:10px;display: flex;margin-bottom: 20px; flex-wrap: wrap;}
.solution_item{display: flex;flex-direction: column;margin-right:10px;border-radius:20px;border: solid 1px #ddd;width:calc(100%/4 - 10px);box-sizing: border-box;height: 320px;margin-bottom: 10px;}
.solution_img{width: 100%;height:190px;border-radius:20px 20px 0 0;}
.solution_item h3{font-weight: bold;font-size: 15px;margin:20px 10px 10px 10px;}
.solution_brief{font-size: 14px;color:#999;line-height: 1.8em;padding:10px; height: 40px; overflow: hidden}
.solution_main{min-height:calc(100vh - 246px)}