border: 1.5625vw solid transparent; border-top- 3vw; border-left- 1vw; border-right- 1vw; border-bottom- 3vw; border-color: transparent; position: relative; border-image-source: url(img/card_bg.24a12478.png); border-image-slice: 70 20 70 20 fill; border-image-outset: 0px; border-image-repeat: stretch repeat;
内容高度 设置为 calc(100% + 4vw)