diff --git a/index.html b/index.html
index 8679842..e47af4a 100644
--- a/index.html
+++ b/index.html
@@ -770,142 +770,236 @@
   </script>
 
   <style>
-    /* 全局字体大小调整 - 整体放大 */
+        /* 全局字体大小调整 - 整体调小 */
     html {
-      font-size: 18px;
+      font-size: 16px;
       scroll-behavior: smooth;
     }
 
     /* 文本样式类 */
-    .body-text {
-      font-size: 1.1rem;
-      line-height: 1.7;
+    .page-body {
+      font-size: 1rem;
+      line-height: 1.6;
     }
 
-    .heading-primary {
-      font-size: clamp(2.8rem, 6vw, 4.5rem);
+    .text-heading-primary {
+      font-size: clamp(2.2rem, 5vw, 3.5rem);
       line-height: 1.2;
     }
 
-    .heading-secondary {
-      font-size: clamp(1.6rem, 3vw, 2.5rem);
+    .text-heading-secondary {
+      font-size: clamp(1.4rem, 2.5vw, 2.2rem);
       line-height: 1.3;
     }
 
-    .heading-tertiary {
-      font-size: clamp(1.7rem, 3vw, 2.5rem);
+    .text-heading-tertiary {
+      font-size: clamp(1.3rem, 2.5vw, 2rem);
       line-height: 1.4;
     }
 
-    .paragraph-text {
-      font-size: 1.1rem;
-      line-height: 1.7;
+    .text-paragraph {
+      font-size: 1rem;
+      line-height: 1.6;
     }
 
-    .list-item {
-      font-size: 1.1rem;
+    .text-list-item {
+      font-size: 1rem;
     }
 
-    .breadcrumb-text {
-      font-size: 1.125rem;
-      padding-top: 0.5rem;
-      padding-bottom: 0.5rem;
+    .text-breadcrumb {
+      font-size: 0.9rem;
+      padding-top: 0.4rem;
+      padding-bottom: 0.4rem;
     }
 
-    .form-label {
-      font-size: 1.15rem;
-      margin-bottom: 0.75rem;
+    .form-label-text {
+      font-size: 1rem;
+      margin-bottom: 0.5rem;
     }
 
-    .form-input {
-      font-size: 1.15rem;
-      padding-top: 1rem;
-      padding-bottom: 1rem;
+    .form-input-field {
+      font-size: 1rem;
+      padding-top: 0.75rem;
+      padding-bottom: 0.75rem;
     }
 
-    .form-input::placeholder {
-      font-size: 1.1rem;
+    .form-input-field::placeholder {
+      font-size: 0.95rem;
     }
 
-    /* 导航菜单字体调大 */
-    .nav-link {
-      font-size: 1.2rem;
+    /* 导航菜单字体调小 */
+    .nav-link-text {
+      font-size: 1rem;
     }
 
-    /* 按钮文字调大 */
-    .button-large {
-      font-size: 1.2rem;
-      padding-top: 1rem;
-      padding-bottom: 1rem;
+    /* 按钮文字调小 */
+    .button-large-text {
+      font-size: 1rem;
+      padding-top: 0.75rem;
+      padding-bottom: 0.75rem;
     }
 
-    /* 特色功能卡片文字调大 */
-    .feature-card>.heading-tertiary {
-      font-size: 1.6rem;
-      margin-bottom: 1rem;
-    }
-
-    .feature-card>.paragraph-text {
-      font-size: 1.15rem;
-      line-height: 1.6;
+    /* 特色功能卡片文字调小 */
+    .feature-card-title {
+      font-size: 1.3rem;
+      margin-bottom: 0.75rem;
     }
 
-    /* 产品宣传区域文字调大 */
-    .promo-section>.paragraph-text {
-      font-size: 1.15rem;
-      line-height: 1.7;
+    .feature-card-description {
+      font-size: 0.95rem;
+      line-height: 1.5;
     }
 
-    .promo-section>ul>.list-item {
-      font-size: 1.15rem;
+    /* 产品宣传区域文字调小 */
+    .promo-section-paragraph {
+      font-size: 1rem;
+      line-height: 1.6;
     }
 
-    .promo-section>.breadcrumb-text {
-      font-size: 1.125rem;
+    .promo-section-list-item {
+      font-size: 1rem;
     }
 
-    /* 修复注册区域标题行距 */
-    #register>.heading-secondary {
-      margin-bottom: 1.5rem;
-      line-height: 1.4;
+    .promo-section-breadcrumb {
+      font-size: 0.9rem;
     }
 
-    /* 页脚文字调大 */
+    /* 页脚文字调小 */
     .footer-text {
-      font-size: 1.1rem;
+      font-size: 0.95rem;
     }
 
     .footer-heading {
-      font-size: 1.5rem;
+      font-size: 1.3rem;
     }
 
-    /* 成功模态框文字调大 */
+    /* 成功模态框文字调小 */
     .modal-heading {
-      font-size: 1.8rem;
+      font-size: 1.5rem;
     }
 
     .modal-text {
-      font-size: 1.15rem;
+      font-size: 1rem;
     }
 
     .modal-button {
-      font-size: 1.15rem;
+      font-size: 1rem;
+    }
+
+    /* 宣传模块高度自适应 - 消除空白 */
+    .promotion-module {
+      display: flex;
+      flex-direction: column;
+      height: auto;
+    }
+
+    .promotion-module-image {
+      display: flex;
+      flex-direction: column;
+    }
+
+    .promotion-module-content {
+      flex: 1;
+      display: flex;
+      flex-direction: column;
+      justify-content: center;
+      padding-bottom: 2rem;
+    }
+
+    .promotion-module-wrapper {
+      flex: 1;
+      display: flex;
+      flex-direction: column;
+      justify-content: space-between;
+      gap: 1.5rem;
+    }
+
+    .promotion-module-breadcrumb {
+      margin-bottom: 0.75rem;
+    }
+
+    .promotion-module-title {
+      margin-bottom: 1rem;
+    }
+
+    .promotion-module-description {
+      margin-bottom: 1rem;
+    }
+
+    .promotion-module-list {
+      gap: 0.75rem;
+      margin-bottom: 1.5rem;
+    }
+
+    .promotion-module-action {
+      margin-top: auto;
+      align-self: flex-start;
     }
 
-    /* 小屏幕适配 */
+    /* 特色功能卡片高度调整 */
+    .feature-card {
+      height: 100%;
+      display: flex;
+      flex-direction: column;
+    }
+
+    .feature-card-icon {
+      margin-bottom: 1rem;
+    }
+
+    .feature-card-title {
+      margin-bottom: 0.75rem;
+    }
+
+    /* 注册表单区域调整 */
+    .register-section-title {
+      margin-bottom: 1rem;
+      line-height: 1.3;
+    }
+
+    .register-section-description {
+      margin-bottom: 1.5rem;
+    }
+
+    .register-section-features {
+      gap: 1rem;
+    }
+
+    /* 页脚区域调整 */
+    .footer-logo {
+      margin-bottom: 1rem;
+    }
+
+    .footer-description {
+      margin-bottom: 1rem;
+    }
+
+    .footer-heading {
+      margin-bottom: 1rem;
+    }
+
+    .footer-list {
+      gap: 0.5rem;
+    }
+
+    /* 移动端适配 */
     @media (max-width: 768px) {
       html {
-        font-size: 16px;
+        font-size: 14px;
       }
-
-      .body-text {
-        font-size: 1.05rem;
+      
+      .page-body {
+        font-size: 0.95rem;
       }
-
-      .mobile-menu>.nav-link {
-        font-size: 1.1rem;
-        padding-top: 0.8rem;
-        padding-bottom: 0.8rem;
+      
+      .mobile-nav-link {
+        font-size: 0.95rem;
+        padding-top: 0.6rem;
+        padding-bottom: 0.6rem;
+      }
+      
+      .promotion-module-content {
+        padding-bottom: 1.5rem;
       }
     }
 
@@ -915,7 +1009,6 @@
         opacity: 0;
         transform: translateY(20px);
       }
-
       to {
         opacity: 1;
         transform: translateY(0);
@@ -926,7 +1019,6 @@
       0% {
         transform: rotate(0);
       }
-
       100% {
         transform: rotate(360deg);
       }