diff --git a/css/index.css b/css/index.css
index d3867f1..30492b8 100644
--- a/css/index.css
+++ b/css/index.css
@@ -1,30 +1,47 @@
 /* banner */
 .banner-cont {
+  position: relative;
   width: 100%;
+  overflow: hidden;
 }
 
 .banner-cont .swiper-slide {
+  position: relative;
   height: 500px;
   width: 100%;
   background: linear-gradient(0, #f7f9fa, #f9fafb);
 }
 
 .banner-cont .swiper-slide .img {
-  /* position: absolute; */
-  z-index: -1;
-  max-height: 100%;
-  max-width: 100%;
+  display: block;
   width: 100%;
-  /* object-fit: fill; */
+  height: 100%;
+  max-width: 100%;
+  max-height: 100%;
+  object-fit: cover;
 }
 
+/* 轮播文字层：居中偏左覆盖在图片上 */
+.banner-cont .swiper-slide .section-content {
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+  max-width: 640px;
+}
+
+.banner-cont .swiper-slide h1 {
+  font-size: 40px;
+  line-height: 1.2;
+  color: #111827;
+}
 
 .banner-cont .banner-desc {
   font-size: 16px;
   margin-top: 30px;
-  margin-bottom: 80px;
+  margin-bottom: 40px;
   max-width: 550px;
-
+  color: rgba(0, 0, 0, 0.75);
 }
 
 /* 轮播文案标签（标题上方的小圆角标签） */