fix

@@ -146,7 +146,7 @@ export default {
 
     .about-img {
       width: 100%;
-      height: 20rem;
+      height: 25rem;
       background-repeat: no-repeat;
       background-size: cover;
       background-position: center;
@@ -158,7 +158,7 @@ export default {
       background-color: #F7F7F7;
       position: relative; /* 父容器设置为相对定位 */
       padding: 2rem;
-      height: 20rem; /* 让 .about-box 撑满父容器 */
+      height: 25rem; /* 让 .about-box 撑满父容器 */
       box-sizing: border-box;
       .title {
         font-weight: bold;