style: slide 卡片收缩间距

src/components/Cards/CourseFileCard.vue

@@ -40,7 +40,7 @@ export default {
 @import '~@/style/theme.scss';
 
 .course-file-card {
-  padding: 2px 8px 2px 12px;
+  padding: 4px 8px 4px 12px;
   border-radius: 12px;
   // border-left: 4px solid $input-background-color;
   background-color: white;

src/components/Cards/SlideCard.vue

@@ -77,7 +77,7 @@ export default {
 @import '~@/style/theme.scss';
 
 .slide-card {
-  padding: 2px 8px 2px 12px;
+  padding: 4px 8px 4px 12px;
   border-radius: 12px;
   background-color: white;
   transition: .2s;

src/views/teacher/components/TeacherCourseSlides.vue

@@ -32,7 +32,7 @@
       <div class="no-content-warning-tip">本课程尚无课件～</div>
       <c-button block theme="blue" @click="handleToCreateCourse">去创建课件</c-button>
     </div>
-    <div v-for="slide of slides" class="mt-8" :key="slide.id">
+    <div v-for="slide of slides" :key="slide.id">
       <slide-card :hide-teacher="!showMore" :hide-course="!showMore" :hide-update-time="!showMore"
                   :slide="slide" :click-handler="handleSlideCardClick"></slide-card>
     </div>