diff --git a/app/static/css/main.css b/app/static/css/main.css
index b41152e..a4737e5 100644
--- a/app/static/css/main.css
+++ b/app/static/css/main.css
@@ -849,6 +849,8 @@ select.form-control {
   box-sizing: border-box !important;
   border-top-left-radius: 0 !important; /* 移除左上角圆角 */
   border-bottom-left-radius: 0 !important; /* 移除左下角圆角 */
+  border-top-right-radius: 0 !important; /* 移除右上角圆角 */
+  border-bottom-right-radius: 0 !important; /* 移除右下角圆角 */
 }
 
 /* 为确保输入组中select元素的边角正确 */
@@ -4099,3 +4101,21 @@ table.selectable-records .expand-button:hover {
 .task:hover .btn.btn-block.text-left {
   color: var(--focus-border-color);
 }
+
+select.task-filter-select,
+.task-filter-select {
+  border-top-right-radius: 0 !important;
+  border-bottom-right-radius: 0 !important;
+}
+
+.input-group .form-control:focus {
+  z-index: 3;
+  position: relative;
+}
+.input-group .form-control:focus + .input-group-append .btn,
+.input-group .form-control:focus + .input-group-append .btn:focus {
+  border-left-color: #2563eb !important; /* 激活时的边框色 */
+  box-shadow: none !important;
+  position: relative;
+  z-index: 2;
+}
diff --git a/app/templates/index.html b/app/templates/index.html
index a1b6fa0..2b851b7 100644
--- a/app/templates/index.html
+++ b/app/templates/index.html
@@ -523,7 +523,7 @@
                       <option value="">全部任务</option>
                       <option v-for="task in taskNames" :value="task" v-html="task"></option>
                     </select>
-                    <i class="bi bi-chevron-down select-arrow" style="position: absolute; pointer-events: none; color: var(--dark-text-color);"></i>
+                    <!-- <i class="bi bi-chevron-down select-arrow" style="position: absolute; pointer-events: none; color: var(--dark-text-color);"></i> -->
                   </div>
                   <div class="input-group-append">
                     <button type="button" class="btn btn-outline-secondary filter-btn-square" @click="clearData('taskDirSelected')"><i class="bi bi-x-lg"></i></button>
@@ -735,7 +735,7 @@
                       <option value="">全部任务</option>
                       <option v-for="task in historyTasks" :value="task" v-html="task"></option>
                     </select>
-                    <i class="bi bi-chevron-down select-arrow" style="position: absolute; pointer-events: none; color: var(--dark-text-color);"></i>
+                    <!-- <i class="bi bi-chevron-down select-arrow" style="position: absolute; pointer-events: none; color: var(--dark-text-color);"></i> -->
                   </div>
                   <div class="input-group-append">
                     <button type="button" class="btn btn-outline-secondary filter-btn-square" @click="clearData('historyTaskSelected')"><i class="bi bi-x-lg"></i></button>