fix: 修复服务中心引导页缺失图片，改用emoji图标

txw-mhzc-web/src/pages/index/views/fwsc/index.vue

@@ -24,7 +24,7 @@
           <!-- 碳服务市场 -->
           <div class="service-card" @click="goToPage('/fwsc/fwsc')">
             <div class="service-card-icon">
-              <img src="@/pages/index/assets/fwsc-fwsc.png" alt="碳服务市场" />
+              <span style="font-size: 48px">🌐</span>
             </div>
             <h3 class="service-card-title">碳服务市场</h3>
             <p class="service-card-desc">汇聚全国优质第三方服务机构，提供从核算到认证的全链条专业服务。</p>
@@ -37,7 +37,7 @@
           <!-- 碳需求市场 -->
           <div class="service-card" @click="goToPage('/fwsc/xqsc')">
             <div class="service-card-icon">
-              <img src="@/pages/index/assets/fwsc-xqsc.png" alt="碳需求市场" />
+              <span style="font-size: 48px">📋</span>
             </div>
             <h3 class="service-card-title">碳需求市场</h3>
             <p class="service-card-desc">企业发布真实服务采购需求，智能匹配靠谱服务商，杜绝中间商差价。</p>
@@ -50,7 +50,7 @@
           <!-- 碳金融市场 -->
           <div class="service-card" @click="goToPage('/fwsc/jrsc')">
             <div class="service-card-icon">
-              <img src="@/pages/index/assets/fwsc-jrsc.png" alt="碳金融市场" />
+              <span style="font-size: 48px">💰</span>
             </div>
             <h3 class="service-card-title">碳金融市场</h3>
             <p class="service-card-desc">打通"碳"与"钱"的通道。提供碳质押、碳回购、绿色信贷及碳基金对接服务。</p>
@@ -63,7 +63,7 @@
           <!-- 碳数据市场 -->
           <div class="service-card" @click="goToPage('/fwsc/sjsc')">
             <div class="service-card-icon">
-              <img src="@/pages/index/assets/fwsc-sjsc.png" alt="碳数据市场" />
+              <span style="font-size: 48px">📊</span>
             </div>
             <h3 class="service-card-title">碳数据市场</h3>
             <p class="service-card-desc">合规高效的碳数据流转平台。包括公共数据、社会性数据、因子库等多类数据库。</p>
@@ -151,11 +151,11 @@ export default {
 // Banner 区
 .banner-section {
   display: flex;
+  height: 280px;
+  text-align: center;
+  background: linear-gradient(135deg, #009a29 0%, #4caf50 100%);
   align-items: center;
   justify-content: center;
-  height: 280px;
-  background: linear-gradient(135deg, #009a29 0%, #4caf50 100%);
-  text-align: center;
 }
 
 .banner-content {
@@ -164,12 +164,12 @@ export default {
 }
 
 .banner-title {
+  margin-bottom: 16px;
   font-size: 48px;
   font-weight: 600;
   line-height: 64px;
   letter-spacing: 0;
   color: #fff;
-  margin-bottom: 16px;
 }
 
 .banner-subtitle {
@@ -195,13 +195,13 @@ export default {
 
 .service-card {
   display: flex;
-  flex-direction: column;
   padding: 32px;
+  cursor: pointer;
   background: #fff;
   border-radius: 12px;
   box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
-  cursor: pointer;
   transition: all 0.3s ease;
+  flex-direction: column;
 
   &:hover {
     transform: scale(1.02);
@@ -213,6 +213,9 @@ export default {
   width: 64px;
   height: 64px;
   margin-bottom: 20px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
 
   img {
     width: 100%;
@@ -222,21 +225,21 @@ export default {
 }
 
 .service-card-title {
+  margin-bottom: 12px;
   font-size: 24px;
   font-weight: 600;
   line-height: 32px;
   letter-spacing: 0;
   color: #1a1a1a;
-  margin-bottom: 12px;
 }
 
 .service-card-desc {
+  margin-bottom: 24px;
   font-size: 14px;
   font-weight: 400;
   line-height: 22px;
   letter-spacing: 0;
   color: #666;
-  margin-bottom: 24px;
   flex-grow: 1;
 }