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				@@ -503,10 +503,21 @@ 
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				               </div> 
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				             </div> 
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				           </div> 
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				-          <div class="rightBox" v-if="this.steps == 3"> 
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				+          <div class="rightBox" v-if="this.steps == 3" ref="rightboxR"> 
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				             <div class="basic_box"> 
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				               <div 
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				-                style="display: flex; flex-direction: row; align-items: center;position: sticky;top: 0;background: #fff;z-index: 99;width: 100%;padding: 0 20px 0 20px;box-sizing: border-box;" 
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				+                style=" 
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				+                  display: flex; 
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				+                  flex-direction: row; 
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				+                  align-items: center; 
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				+                  position: sticky; 
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				+                  top: 0; 
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				+                  background: #fff; 
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				+                  z-index: 99; 
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				+                  width: 100%; 
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				+                  padding: 0 20px 0 20px; 
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				+                  box-sizing: border-box; 
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				+                " 
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				               > 
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				                 <div class="cru_selectBox"> 
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				                   <div 
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				@@ -532,7 +543,7 @@ 
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				               </div> 
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				               <div 
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				-                style="margin: 0 0 40px 0;padding: 0 20px 0 20px;" 
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				+                style="margin: 0 0 40px 0; padding: 0 20px 0 20px" 
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				                 v-for="(item, index) in unitJson[unitIndex].chapterInfo" 
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				                 :key="index" 
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				               > 
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				@@ -2975,6 +2986,9 @@ export default { 
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				     }, 
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				     unitSet(i) { 
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				       this.unitIndex = i; 
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				+      setTimeout(() => { 
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				+        this.$refs.rightboxR.scrollTop = 0; 
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				+      }, 0); 
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				     }, 
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				     time() { 
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				       if (!this.now) { 
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