style: refine teacher question dialog layout

src/layout/components/AppMain.vue

@@ -411,6 +411,9 @@ router.beforeEach((to, from, next) => {
 
 .teacher-dialog.el-dialog,
 .teacher-dialog .el-dialog {
+  width: min(760px, calc(100vw - 32px));
+  max-height: calc(100vh - 32px);
+  overflow: hidden;
   border: 1px solid rgba(52, 177, 238, 0.42);
   border-radius: 12px;
   background: linear-gradient(135deg, rgba(6, 24, 38, 0.98), rgba(4, 13, 24, 0.98));
@@ -437,6 +440,8 @@ router.beforeEach((to, from, next) => {
 }
 
 .teacher-dialog .el-dialog__body {
+  min-height: 0;
+  overflow-y: auto;
   color: #d9efff;
   background: transparent;
 }

src/views/teacherEnd/exam/index.vue

@@ -64,7 +64,7 @@
       </el-tab-pane>
     </el-tabs>
 
-    <el-dialog v-model="questionDialog" :title="questionForm.id ? '编辑题目' : '新增题目'" width="720px" custom-class="teacher-dialog" destroy-on-close>
+    <el-dialog v-model="questionDialog" :title="questionForm.id ? '编辑题目' : '新增题目'" width="760px" class="teacher-dialog" destroy-on-close>
       <el-form ref="questionFormRef" :model="questionForm" :rules="questionRules" label-width="92px">
         <el-form-item label="题型" prop="type"><el-radio-group v-model="questionForm.type" @change="resetAnswer"><el-radio-button v-for="item in typeOptions" :key="item.value" :label="item.value">{{ item.label }}</el-radio-button></el-radio-group></el-form-item>
         <el-form-item label="题干" prop="stem"><el-input v-model="questionForm.stem" type="textarea" :rows="4" maxlength="2000" show-word-limit /></el-form-item>
@@ -327,9 +327,9 @@ function formatTime(value) { return value ? new Date(value).toLocaleString("zh-C
 
 .option-row {
   display: grid;
-  grid-template-columns: 28px 42px 1fr 36px;
+  grid-template-columns: 28px minmax(0, 1fr) 36px;
   align-items: center;
-  gap: 6px;
+  gap: 10px;
   margin-bottom: 10px;
 }