定位写竖线

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.grid {             position: relative;               &:first-child::before {                 content: '';                 width: 1px; //边框宽度                 height: 100px; //边框长度                 position: absolute;                 right: 0; //设置为右边框                 top: 10px; //在距离顶部88px的地方开始绘制边框                 background-color: #DAE7F9; //边框的颜色             }               width: 180px;               border-bottom: 1px solid #DAE7F9;             text-align: center;               .number {                 margin-top: 10px;                 color: #2570F2;                 font-weight: 600;                 font-size: 16px;               }               .desc {                 font-size: 14px;                 color: #909399;             }         }     } }