diff --git a/.env.development b/.env.development
index 51b5e142..948cb700 100644
--- a/.env.development
+++ b/.env.development
@@ -11,7 +11,7 @@ VITE_APP_BASE_API_Url = 'https://aitstest.jlbank.com.cn:7001'
 # http://25.18.122.65:7001/download/dev-jax.apk
 # app入口
 #VITE_APP_BASE_API_Url = 'http://25.16.122.65:7001'
-#VITE_APP_BASE_API_Url = 'http://25.18.122.91:9786'
+#VITE_APP_BASE_API_Url = 'http://25.16.122.91:9786'
 #VITE_APP_BASE_API_Url = 'http://25.18.122.66:9786'
 
 
diff --git a/src/components/image-preview/image-preview.vue b/src/components/image-preview/image-preview.vue
index 23341f1b..34f3d51f 100644
--- a/src/components/image-preview/image-preview.vue
+++ b/src/components/image-preview/image-preview.vue
@@ -1,5 +1,5 @@
 <template>
-	<image :src="imgUrlShow" fit="cover"></image>
+	<image :src="imgUrlShow" fit="cover" :mode="mode"></image>
 </template>
 
 <script>
@@ -30,7 +30,11 @@
 			isCache:{
 				type: Boolean,
 				default: false
-			}
+			},
+			mode:{
+				type: String,
+				default: 'widthFix'
+			},
 		},
 		data() {
 			return {
diff --git a/src/components/picture-upload/picture-upload.vue b/src/components/picture-upload/picture-upload.vue
index 46c17667..6a48e4a8 100644
--- a/src/components/picture-upload/picture-upload.vue
+++ b/src/components/picture-upload/picture-upload.vue
@@ -1,7 +1,7 @@
 <template>
 	<view class="components_custom_file_upload_div pic-cell">
-		<view v-for="(item,index) in fileList" class="img_div pic-item">
-			<image-preview :imgId="item.fileId" class="img"></image-preview>
+		<view v-for="(item,index) in fileList" class="img_div pic-item" @click="pic_click(item, index)">
+			<image-preview :imgId="item.fileId" class="img" mode="aspectFill"></image-preview>
 		</view>
 		<view @tap="upload" v-show="show_upload_button">
 			<view class="  add_icon"></view>
@@ -25,6 +25,14 @@
 	const show_upload_button = computed(() => {
 		return !props.readonly && props.limit > fileList.length
 	})
+	const pic_click = (item, index) => {
+		common.show('提示', '是否删除图片' + (index + 1)).then(res => {
+			if (res) {
+				fileList.splice(index, 1)
+				emits('update:modelValue', fileList.map(res => res.fileId))
+			}
+		})
+	}
 	// 定义props
 	const props = defineProps({
 		modelValue: {
@@ -56,19 +64,13 @@
 				fileId: res
 			})))
 		} 
-		// else if ((typeof newVal === "String") && newVal !== '') {
-		// 	fileList.push({
-		// 		fileId: newVal
-		// 	})
-		// }
 	}, {
 		deep: true,
 		immediate: true
 	})
 	// 定义emits
 	const emits = defineEmits(['update:modelValue'])
-
-
+	
 	onMounted(() => {
 
 	})
diff --git a/src/pages/course/components/touchBtn.vue b/src/pages/course/components/touchBtn.vue
index 1d11dbdb..fb819dba 100644
--- a/src/pages/course/components/touchBtn.vue
+++ b/src/pages/course/components/touchBtn.vue
@@ -38,7 +38,7 @@
 </template>
 
 <script setup>
-import { toRefs, ref, computed, unref, onMounted, onUnmounted, defineEmits, nextTick } from 'vue';
+import { toRefs, ref, computed, unref, onMounted, onUnmounted, nextTick } from 'vue';
 const emit = defineEmits(['uploadVoice', 'submitAnswer','startRecord'])
 const props = defineProps({
 	answerType:{
diff --git a/src/pages/courseDetail/components/comment.vue b/src/pages/courseDetail/components/comment.vue
index 44dce679..acbd367b 100644
--- a/src/pages/courseDetail/components/comment.vue
+++ b/src/pages/courseDetail/components/comment.vue
@@ -1,88 +1,84 @@
 <template>
 	<view class="comment_div">
-		<scroll-view class="scroll-view" :scroll-y="true" :show-scrollbar="false">
-
-			<view class="message_div" v-for="(item,index) in message_list">
-				<view class="head_div">
-					<image-preview v-if="item.userIconImgId" class="img-box img"
-						:src="item.userIconImgId"></image-preview>
-					<image v-else src="/static/images/me/default_user_avatar.png" class="img"></image>
+		<view class="empty_message_div" v-if="message_list.length == 0">
+			<image class="img" src="@/static/images/courseDetail/empty_message.png"></image>
+		</view>
+		<!-- message_list -->
+		<view class="message_div" v-for="(item,index) in message_list">
+			<view class="head_div">
+				<image-preview v-if="item.userIconImgId" class="img-box img" :src="item.userIconImgId"></image-preview>
+				<image v-else src="/static/images/me/default_user_avatar.png" class="img"></image>
+			</view>
+			<view class="msg_content">
+				<view class="title_div">
+					<view class="name">{{item.userName}}</view>
+					<view class="title_tip">{{item.bbsTagDesc}}</view>
 				</view>
-				<view class="msg_content">
-					<view class="title_div">
-						<view class="name">{{item.userName}}</view>
-						<view class="title_tip">{{item.bbsTagDesc}}</view>
-					</view>
-					<view class="title">
-						{{item.bbsContent}}
-					</view> 
-					<view class="img_div pic-cell">
-						<image-preview v-for="img in item.imgIdList" :imgId="img" class="pic-item"></image-preview>
-					</view>
-					<view class="time_and_reply">
-						<view class="time">{{item.bbsTm.substr(0,16)}}</view>
-						<view class="reply" @click="click_reply(item, item.bbsId, index)">回复</view>
-					</view>
-					<view class="show_close_div" v-if="item.children?.length" @click="item.show = !item.show">
-						<template v-if="item.show">
-							<view>收起</view>
-							<view class="back_div">
-								<view class="back-icon"></view>
-							</view>
-						</template>
-						<template v-else>
-							<view>展开{{item.children?.length}}条回复</view>
-							<view class="back_div">
-								<view class="back-icon"></view>
-							</view>
-						</template>
-					</view>
-					<view class="children" v-if="item.show">
-						<view class="message_div" v-for="childrenItem in item.children">
-							<view class="head_div">
-								<image-preview v-if="childrenItem.userIconImgId" class="img-box img"
-									:src="childrenItem.userIconImgId"></image-preview>
-								<image v-else src="/static/images/me/default_user_avatar.png" class="img"></image>
-							</view>
-							<view class="msg_content">
-								<view class="title_div">
-									<view class="name">{{childrenItem.userName}}</view>
-									<view class="arrow"></view>
-									<view class="name">{{childrenItem.rtnUName}}</view>
-
-								</view>
-								<view class="title">
-									{{childrenItem.bbsContent}}
-								</view>
-								<view class="img_div">
-								</view>
-								<view class="time_and_reply">
-									<view class="time">{{childrenItem.bbsTm.substr(0,16)}}</view>
-									<view class="reply"
-										@click="click_reply(childrenItem, childrenItem.parentId, index)">回复
-									</view>
-								</view>
-
+				<view class="title">
+					{{item.bbsContent}}
+				</view>
+				<view class="img_div pic-cell">
+					<image-preview v-for="img in item.imgIdList" :imgId="img" class="pic-item"></image-preview>
+				</view>
+				<view class="time_and_reply">
+					<view class="time">{{item.bbsTm.substr(0,16)}}</view>
+					<view class="reply" @click="click_reply(item, item.bbsId, index)">回复</view>
+				</view>
+				<view class="show_close_div" v-if="item.children?.length" @click="item.show = !item.show">
+					<template v-if="item.show">
+						<view>收起</view>
+						<view class="back_div">
+							<view class="back-icon"></view>
+						</view>
+					</template>
+					<template v-else>
+						<view>展开{{item.children?.length}}条回复</view>
+						<view class="back_div">
+							<view class="back-icon"></view>
+						</view>
+					</template>
+				</view>
+				<view class="children" v-if="item.show">
+					<view class="message_div" v-for="childrenItem in item.children">
+						<view class="head_div">
+							<image-preview v-if="childrenItem.userIconImgId" class="img-box img"
+								:src="childrenItem.userIconImgId"></image-preview>
+							<image v-else src="/static/images/me/default_user_avatar.png" class="img"></image>
+						</view>
+						<view class="msg_content">
+							<view class="title_div">
+								<view class="name">{{childrenItem.userName}}</view>
+								<view class="arrow"></view>
+								<view class="name">{{childrenItem.rtnUName}}</view>
 
 							</view>
+							<view class="title">
+								{{childrenItem.bbsContent}}
+							</view>
+							<view class="img_div">
+							</view>
+							<view class="time_and_reply">
+								<view class="time">{{childrenItem.bbsTm.substr(0,16)}}</view>
+								<view class="reply" @click="click_reply(childrenItem, childrenItem.parentId, index)">回复
+								</view>
+							</view>
+
+
 						</view>
 					</view>
-
-
 				</view>
+
 			</view>
-			<view class="send_evaluate_div_height"></view>
-		</scroll-view>
+		</view>
 		<view class="send_evaluate_div">
 			<uv-button type="primary" class="send_evaluate"
 				@click="common.navigateTo('/pages/courseDetail/submit?crsNum='+props.crsNum+'&imgId='+props.imgId)">发布评价</uv-button>
 		</view>
 
 		<uni-popup ref="popup" background-color="red">
-
 			<view class="bottom_reply_input_div">
 				<uv-input v-model="reply_data.bbsContent" placeholderStyle='color:#999999;font-size:26rpx'
-					:placeholder="reply_data.placeholder" :focus="true">
+					:placeholder="reply_data.placeholder" :focus="true" :maxlength="160">
 				</uv-input>
 				<view class="" style="display: flex;flex-direction: column; margin:10rpx 20rpx;">
 					<view class="fl1"></view>
@@ -169,22 +165,31 @@
 			Object.assign(message_list, body)
 		})
 	}
-	defineExpose({getData})
+	defineExpose({
+		getData
+	})
 	onMounted(() => {
 		getData()
 	})
 </script>
 
 <style lang="scss" scoped>
-	
-	
+	.empty_message_div{
+		display: flex;
+		justify-content: center;
+		padding: 80rpx 0;
+		.img{
+			width: 288rpx;
+			height: 276rpx;
+		}
+	}
 	.pic-cell {
 		width: 100%;
 		display: flex;
 		flex-wrap: wrap;
 		justify-content: flex-start;
 	}
-	
+
 	.pic-item {
 		margin-right: 16rpx;
 		width: 170rpx;
@@ -193,31 +198,29 @@
 		// background-color: red;
 		margin-bottom: 24rpx;
 	}
-	
+
 	.send_evaluate_div_height {
 		height: 170rpx;
 	}
 
 	.send_evaluate_div {
-		position: absolute;
-		bottom: 0rpx;
-		width: calc(100% - 80rpx);
-		padding-top: 10rpx;
-		padding-bottom: 30rpx;
+		position: fixed;
+		left: 0;
+		bottom: 0;
+		width: 100%;
+		padding: 10rpx 20rpx 30rpx 20rpx;
+		// padding-top: 10rpx;
+		// padding-bottom: 30rpx;
 		background-color: #ffffff;
+
+		// background-color: red;
 		:deep(.uv-button-wrapper) {
 			.uv-button {
 				border-radius: 14rpx;
 				height: 92rpx;
 			}
 		}
-	}
-	
-	.scroll-view {
-		
-		position: relative;
-		height: calc(100vh - 88rpx - 162rpx - 256rpx - 50rpx);
-		overflow: hidden;
+
 	}
 
 	// 顶部随着输入法弹出的框
@@ -271,8 +274,6 @@
 		}
 	}
 
-
-
 	.message_div:not(:first-child) {
 		margin-top: 30rpx;
 	}
@@ -280,6 +281,8 @@
 	.message_div {
 		// margin-top: 30rpx;
 		display: flex;
+		margin-left: 20rpx;
+		margin-right: 20rpx;
 
 		.head_div {
 			.img {
@@ -401,11 +404,11 @@
 	}
 
 	.comment_div {
-		padding: 20rpx 20rpx 20rpx 40rpx;
+		padding: 20rpx 0 20rpx 0;
 		background-color: #ffffff;
 		border-radius: 24rpx;
 		position: relative;
-		height: calc(100vh - 88rpx - 162rpx - 256rpx - 70rpx);
-		overflow: hidden;
+		// height: calc(100vh - 88rpx - 162rpx - 256rpx - 70rpx);
+		// overflow: hidden;
 	}
 </style>
\ No newline at end of file
diff --git a/src/pages/courseDetail/components/introduce.vue b/src/pages/courseDetail/components/introduce.vue
index 1f6ac5d5..ced8e1ab 100644
--- a/src/pages/courseDetail/components/introduce.vue
+++ b/src/pages/courseDetail/components/introduce.vue
@@ -32,7 +32,7 @@
 				</view>
 			</view>
 			<view class="bottom-right">
-				<image src="/src/static/images/courseDetail/mipmap-xhdpi/ditu.png" class="right-img" mode="widthFix"></image>
+				<image src="/src/static/images/courseDetail/ditu.png" class="right-img" mode="widthFix"></image>
 			</view>
 		</view>
 	</view>
diff --git a/src/pages/courseDetail/components/knowledge.vue b/src/pages/courseDetail/components/knowledge.vue
index 05962621..56ca11bb 100644
--- a/src/pages/courseDetail/components/knowledge.vue
+++ b/src/pages/courseDetail/components/knowledge.vue
@@ -1,24 +1,26 @@
 <template>
-	<view class="point-item mb-30" v-for="(item, index) in modelValue?.pgrphData || []" :key="item.index">
-		<view class="flex">
+	<view class="point-item mb-30" v-for="(item, index) in modelValue?.pgrphData || []" :key="item.index"
+		@click="toDetail(item)" :class="item.pgrphStdyStateName == '已学习' ? 'learn' : 'unlearn'">
+		<view class="top mb-30">
 			<view class="blue-ball">
 				<view class="ball"></view>
 			</view>
-			<view class="item-label" @click="toDetail(item)">
-				<view class="fz-30 font_pf fw-400 mb-30">知识点0{{ index + 1 }}</view>
-				<view class="fz-30 font_pf fw-400 mb-36">{{ item.pgrphContent }}</view>
+			<view class="fz-30 font_pf title">知识点0{{ index + 1 }}</view>
+			<view class="fl1">
+				
 			</view>
+			<view class="font_pf fz-24 study-status" >
+				{{ item.pgrphStdyStateName }}
+			</view>
+
 		</view>
-		<view class="pt-8">
-			<view class="font_pf fz-24" :class="item.pgrphStdyStateName == '已学习' ? 'learn' : 'unlearn'">
-				{{ item.pgrphStdyStateName }}</view>
+		<view class="bottom">
+			<view class="fz-30 font_pf text">{{  item.pgrphContent }}</view>
 		</view>
 	</view>
 </template>
 
 <script setup>
-	
-	
 	import common from '@/common/common';
 	const emit = defineEmits(['toStudyPrgh'])
 
@@ -31,16 +33,43 @@
 </script>
 
 <style lang="scss" scoped>
+	.learn{
+		.study-status{
+			color: #1DD17A;
+		}
+		.title,.text{
+			color: #000;
+			font-weight: 600;
+		}
+		
+	}
+	.unlearn{
+		.study-status{
+			color: #666666;
+		}
+		color: #666;
+	}
 	.point-item {
 		background-color: #fff;
-		display: flex;
+		// display: flex;
 		padding-top: 24rpx;
 		padding-left: 36rpx;
 		padding-right: 52rpx;
+		padding-bottom: 36rpx;
 		border-radius: 22rpx;
-		justify-content: space-between;
+
+		// justify-content: space-between;
 		// margin-left: 16rpx;
 		// margin-right: 16rpx;
+		.top {
+			display: flex;
+			justify-content: space-between;
+		}
+
+		.bottom {
+			padding-left: 12rpx;
+		}
+
 		.blue-ball {
 			padding-top: 16rpx;
 			margin-right: 12rpx;
diff --git a/src/pages/courseDetail/index.vue b/src/pages/courseDetail/index.vue
index 165c2596..a6feeb10 100644
--- a/src/pages/courseDetail/index.vue
+++ b/src/pages/courseDetail/index.vue
@@ -1,80 +1,92 @@
 <template>
-	<view class="max_page detail-main" style="overflow: hidden;">
-		<image src="/src/static/images/courseDetail/mipmap-xhdpi/bg.png" mode="widthFix" class="back-image"></image>
-		<view class="back_div" @click="common.navigateBack()">
-			<view class="back-icon"></view>
-		</view>
-		<view class="detail-body">
-			<view class="head-title font_pf">
-				<view class="title-text">{{ form.crsName }}</view>
-				<view class="title-num">
-					<view class="num-item">
-						<image class="title-icon" src="/src/static/images/courseDetail/mipmap-xhdpi/zhishidian.png"
-							mode="widthFix"></image>
-						<view class="mr-10">知识点</view>
-						<view class="c-000">{{ form.pgrphNum }}</view>
-					</view>
-					<view class="num-item">
-						<image class="title-icon" src="/src/static/images/courseDetail/mipmap-xhdpi/yixue.png"
-							mode="widthFix"></image>
-						<view class="mr-10">已学</view>
-						<view class="c-000">{{ form.styParaGraphNum }}</view>
+	<view class="max_page ">
+		<nav-bar :is_seat="false" :backgroundColor="bgOpacity"></nav-bar>
+		<scroll-view :scroll-y="tabAct!=4" class="scroll detail-main" @scroll="scroll_fun">
+			<view class="bg_div">
+				<image-preview class="img_100 " :imgId="form.imgId" mode="widthFix"></image-preview>
+				<!-- <image :src="form.imgId" mode="widthFix" class="back-image"></image> -->
+			</view>
+			<view class="back_div" @click="common.navigateBack()">
+				<view class="back-icon"></view>
+			</view>
+			<view class="detail-body">
+				<view class="head-title font_pf">
+					<view class="title-text">{{ form.crsName || '' }}</view>
+					<view class="title-num">
+						<view class="num-item">
+							<image class="title-icon" src="/src/static/images/courseDetail/zhishidian.png"
+								mode="widthFix"></image>
+							<view class="mr-10">知识点</view>
+							<view class="c-000">{{ form.pgrphNum || 0 }}</view>
+						</view>
+						<view class="num-item">
+							<image class="title-icon" src="/src/static/images/courseDetail/yixue.png"
+								mode="widthFix"></image>
+							<view class="mr-10">已学</view>
+							<view class="c-000">{{ form.styParaGraphNum || 0 }}</view>
+						</view>
 					</view>
 				</view>
-			</view>
-			<view class="body-box">
-				<view class="body-tab">
-					<uv-tabs class="font_pf" :current="tabAct" :list="tabList" @change="tabSwitch" :scrollable="false"
-						line-color="#0066FF"
-						:active-style="{ color: '#323E57', 'font-weight': 600, 'font-size': '30rpx' }"
-						:inactive-style="{ color: '#666666', 'font-size': '30rpx' }"></uv-tabs>
-				</view>
+				<view class="body-box">
+					<view class="body-tab">
+						<uv-tabs class="font_pf" :current="tabAct" :list="tabList" @change="tabSwitch"
+							:scrollable="false" line-color="#0066FF"
+							:active-style="{ color: '#323E57', 'font-weight': 600, 'font-size': '30rpx' }"
+							:inactive-style="{ color: '#666666', 'font-size': '30rpx' }"></uv-tabs>
+					</view>
 
-				<view class="course-info" v-if="tabAct == 0">
-					<introduceVue v-model="form"></introduceVue>
-				</view>
-				<view class="point" v-if="tabAct == 1">
-					<knowledge v-model="form" @toStudyPrgh="toStudyPrgh"></knowledge>
-				</view>
-				<view class="evaluate" v-if="tabAct == 2">
-					<comment ref="commentRef" :crsNum="form.crsNum" :imgId="form.imgId"></comment>
-				</view>
+					<view class="course-info" v-if="tabAct == 0">
+						<introduceVue v-model="form"></introduceVue>
+					</view>
+					<view class="point" v-if="tabAct == 1">
+						<knowledge v-model="form" @toStudyPrgh="toStudyPrgh"></knowledge>
+					</view>
+					<view class="evaluate" v-if="tabAct == 2">
+						<comment ref="commentRef" :crsNum="form.crsNum" :imgId="form.imgId"></comment>
+					</view>
 
+				</view>
 			</view>
-		</view>
+
+		</scroll-view>
 		<view class="btn-box btn-box-height font_pf" v-if="[0,1].includes(tabAct)">
 
 			<uv-button type="primary"
 				@click="common.navigateTo('/pages/course/study?crsNum='+crsNum+'&crsId='+form.crsId)">去学习</uv-button>
 			<uv-button type="primary">去练习</uv-button>
 			<uv-button type="primary">去考试</uv-button>
-			
+
 			<!-- 	<template v-if="tabAct == 2">
-				<uv-button type="primary" class="send_evaluate"
-					@click="common.navigateTo('/pages/courseDetail/submit?crsNum='+crsNum)">发布评价</uv-button>
-			</template> -->
-			
+			<uv-button type="primary" class="send_evaluate"
+				@click="common.navigateTo('/pages/courseDetail/submit?crsNum='+crsNum)">发布评价</uv-button>
+		</template> -->
+
 		</view>
 	</view>
+
+
 </template>
 
 <script setup>
 	import {
 		reactive,
-		ref
+		ref,
+		computed 
 	} from 'vue';
+	
 	import {
-		onLoad,onShow
-	} from '@dcloudio/uni-app';
+		onShow,
+		onLoad,
+		onUnload
+	} from '@dcloudio/uni-app'
 	import {
 		getCourseDetailApi
 	} from '@/api/courseDetail.js';
-	// import {formatDate2} from '@/common/common.js'
 	import common from '@/common/common';
 	import introduceVue from './components/introduce.vue';
 	import knowledge from './components/knowledge.vue';
 	import comment from './components/comment.vue';
-	
+
 	// tab栏
 	const tabList = ref([{
 		name: '课程介绍'
@@ -83,10 +95,12 @@
 	}, {
 		name: '评价'
 	}]);
+	
 	const commentRef = ref(null);
 	const form = ref({});
 	const crsNum = ref('');
 	const tabAct = ref(0);
+	const scrollTop = ref(0);
 	const tabSwitch = (item) => {
 		tabAct.value = item.index;
 	};
@@ -98,41 +112,52 @@
 		});
 		form.value = body;
 	};
+	const toStudyPrgh = (info) => {
+		common.navigateTo('/pages/course/study?crsNum=' + crsNum.value + '&crsId=' + form.value.crsId + '&pgrphId=' +
+			info.pgrphId)
+	}
+	
+	const bgOpacity = computed(() => {
+		if (scrollTop.value <= 20) return `rgba(255,255,255,0)`;
+		const opacity =  Math.min(1, (scrollTop.value - 20) / 80);
+		return `rgba(255,255,255,${opacity})`;
+	});
+	const scroll_fun = (e) => {
+		scrollTop.value = e.detail.scrollTop
+	}
 	onLoad((params) => {
 		crsNum.value = params.crsNum;
 		getData();
-	});
-	onShow(() => {
-		if (common.getPageCache('GLOBAL_TRIGGER_UPDATE_REFRESH_KEY')) {
+		uni.$on('refresh_comment_data', () => {
 			commentRef.value.getData();
-		}
+		})
+	});
+	onUnload(() => {
+		uni.$off('refresh_comment_data')
 	});
-	const toStudyPrgh = (info)=>{
-		common.navigateTo('/pages/course/study?crsNum='+crsNum.value+'&crsId='+form.value.crsId+'&pgrphId=' + info.pgrphId)
-	}
 </script>
 
 <style lang="scss" scoped>
-	
 	.back_div {
 		margin-right: 10rpx;
-		position: absolute;
+		position: fixed;
 		left: 46rpx;
 		top: 64rpx;
+
 		.back-icon {
 			position: relative;
 			width: 40rpx;
 			height: 40rpx;
 			cursor: pointer;
 		}
-	
+
 		.back-icon::before,
 		.back-icon::after {
 			content: '';
 			position: absolute;
 			transition: all 0.3s ease;
 		}
-	
+
 		.back-icon::after {
 			top: 25%;
 			left: 25%;
@@ -143,21 +168,28 @@
 			transform: rotate(-45deg);
 		}
 	}
-	
+
 	.detail-main {
 		background-color: #f5f5f5;
 		position: relative;
+		height: 100%;
+		overflow: hidden;
+	}
+
+	.scroll {
+		height: 100vh;
 	}
 
 	.detail-body {
 		box-sizing: border-box;
-		min-height: calc(100vh - 256rpx);
+		// min-height: calc(100vh - 256rpx);
 		position: absolute;
 		top: 256rpx;
 		border-radius: 23rpx 23rpx 0rpx 0rpx;
 		width: 100%;
 		display: flex;
 		flex-direction: column;
+
 	}
 
 	.body-head {
@@ -165,14 +197,20 @@
 		background-color: red;
 	}
 
-	.back-image {
-		position: absolute;
+	.bg_div {
+		position: fixed;
 		width: 100%;
+
+		.back-image {
+
+			width: 100%;
+		}
 	}
 
+
 	.head-title {
 		border-radius: 24rpx 24rpx 0rpx 0rpx;
-		height: 162rpx;
+		// height: 162rpx;
 		background-color: #ffffff;
 		display: flex;
 		flex-direction: column;
diff --git a/src/pages/courseDetail/submit.vue b/src/pages/courseDetail/submit.vue
index 58c66fe9..72890785 100644
--- a/src/pages/courseDetail/submit.vue
+++ b/src/pages/courseDetail/submit.vue
@@ -18,21 +18,15 @@
 				<view class="tips font_pf">最多可添加4张图片</view>
 				<view class="num">
 					<view class="num-pic">
-						<image-preview class="img_100" :imgId="imgId" :isCache="true"></image-preview>
+						<image-preview class="img_100" :imgId="imgId" :isCache="true" mode="aspectFill"></image-preview>
 						<!-- <img class="w_100" src="/src/static/images/test/touxiang.png" mode="widthFix" /> -->
 					</view>
 					<view class="num-box">
-						<view class="font_pf fz-28 c-666">综合评分(1-11)</view>
+						<view class="font_pf fz-28 c-666">综合评分(1-10)</view>
 						<view class="slider-box">
-							<!-- <uv-slider step="1" activeColor="#0066FF" :blockSize="14" v-model="formData.bbsGrade"
-								:min="0" :max="10"></uv-slider> -->
-							<slider :min="0" :max="10" :value="formData.bbsGrade" :step="0.1" :show-value="true"
+							<slider :min="0" :max="10" :value="10" @change="sliderChange" :step="0.1" :show-value="true"
 								:blockSize="14"></slider>
 						</view>
-						<!-- <view class="flex-jcsb">
-							<view class="font_pf fz-30 c-000">0</view>
-							<view class="font_pf fz-30 c-000 tar">10</view>
-						</view> -->
 					</view>
 				</view>
 				<view class="tab">
@@ -78,6 +72,10 @@
 		"bbsContent": '', // 评价内容
 	})
 	const imgId = ref('')
+	const sliderChange = (event) => {
+		formData.bbsGrade = event.detail.value
+	}
+	
 	const submit = () => {
 		if (formData.bbsContent === '') {
 			if (formData.bbsTag == 'SUG') {
@@ -89,9 +87,8 @@
 		publishCrsEvaluation(formData).then(res => {
 			common.msg('发表成功')
 			setTimeout(() => {
-				common.navigateBack(1, () => {
-					common.setPageCache('GLOBAL_TRIGGER_UPDATE_REFRESH_KEY', true)
-				})
+				uni.$emit('refresh_comment_data')
+				common.navigateBack()
 			}, 500)
 		})
 	}
diff --git a/src/pages/index/index.vue b/src/pages/index/index.vue
index ea38df30..7963d8d5 100644
--- a/src/pages/index/index.vue
+++ b/src/pages/index/index.vue
@@ -131,7 +131,7 @@
 							<uv-skeleton :loading="!item.crsNum" :rows="3" avatar avatar-shape="square" :title="false">
 								<view class="item" @click="goto_course_detail(item.crsNum)">
 									<view class="left">
-										<image-preview class="img-box img" :imgId="item.imgThumbId"></image-preview>
+										<image-preview class="img-box img" :imgId="item.imgThumbId" mode="aspectFit"></image-preview>
 									</view>
 									<view class="right">
 										<view class="title ellipsis-text">{{item.crsName}}</view>
@@ -164,7 +164,7 @@
 							<uv-skeleton :loading="!item.crsNum" :rows="3" avatar avatar-shape="square" :title="false">
 								<view class="item" @click="goto_course_detail(item.crsNum)">
 									<view class="left">
-										<image-preview class="img-box img" :imgId="item.imgThumbId"></image-preview>
+										<image-preview class="img-box img" :imgId="item.imgThumbId" mode="aspectFit"></image-preview>
 									</view>
 									<view class="right">
 										<view class="title ellipsis-text">{{item.crsName}}</view>
@@ -196,7 +196,7 @@
 							<uv-skeleton :loading="!item.crsNum" :rows="3" avatar avatar-shape="square" :title="false">
 								<view class="item" @click="goto_course_detail(item.crsNum)">
 									<view class="left">
-										<image-preview class="img-box img" :imgId="item.imgThumbId"></image-preview>
+										<image-preview class="img-box img" :imgId="item.imgThumbId" mode="aspectFit"></image-preview>
 									</view>
 									<view class="right">
 										<view class="title ellipsis-text">{{item.crsName}}</view>
diff --git a/src/static/images/courseDetail/mipmap-xhdpi/ditu.png b/src/static/images/courseDetail/ditu.png
similarity index 100%
rename from src/static/images/courseDetail/mipmap-xhdpi/ditu.png
rename to src/static/images/courseDetail/ditu.png
diff --git a/src/static/images/courseDetail/empty_message.png b/src/static/images/courseDetail/empty_message.png
new file mode 100644
index 00000000..6d638e41
Binary files /dev/null and b/src/static/images/courseDetail/empty_message.png differ
diff --git a/src/static/images/courseDetail/mipmap-xhdpi/bg.png b/src/static/images/courseDetail/mipmap-xhdpi/bg.png
deleted file mode 100644
index 835a7323..00000000
Binary files a/src/static/images/courseDetail/mipmap-xhdpi/bg.png and /dev/null differ
diff --git a/src/static/images/courseDetail/mipmap-xhdpi/yixue.png b/src/static/images/courseDetail/yixue.png
similarity index 100%
rename from src/static/images/courseDetail/mipmap-xhdpi/yixue.png
rename to src/static/images/courseDetail/yixue.png
diff --git a/src/static/images/courseDetail/mipmap-xhdpi/zhishidian.png b/src/static/images/courseDetail/zhishidian.png
similarity index 100%
rename from src/static/images/courseDetail/mipmap-xhdpi/zhishidian.png
rename to src/static/images/courseDetail/zhishidian.png