diff --git a/frontend/src/components/DropdownSelect.vue b/frontend/src/components/DropdownSelect.vue
index f16160d..06eead0 100644
--- a/frontend/src/components/DropdownSelect.vue
+++ b/frontend/src/components/DropdownSelect.vue
@@ -1,7 +1,7 @@
 <script setup lang="ts" generic="T extends string">
 // 커스텀 드롭다운(셀렉트) — 네이티브 select 대신 디자인 토큰에 맞춘 정렬/필터 공통 UI.
-// 사용처: 프로젝트 목록·업무 목록 정렬, 내 업무 프로젝트/정렬, 활동 멤버 필터.
-import { computed, onBeforeUnmount, onMounted, ref } from 'vue'
+// 메뉴는 body 로 Teleport + fixed 위치로 띄워, 스크롤/overflow 컨테이너 안에서도 잘리지 않는다.
+import { computed, nextTick, onBeforeUnmount, onMounted, ref } from 'vue'
 
 interface Option {
   value: T
@@ -25,36 +25,67 @@ const emit = defineEmits<{ (e: 'update:modelValue', value: T): void }>()
 
 const open = ref(false)
 const root = ref<HTMLElement | null>(null)
+const triggerRef = ref<HTMLElement | null>(null)
+const menuRef = ref<HTMLElement | null>(null)
+// 메뉴 fixed 위치(트리거 기준 계산)
+const menuStyle = ref<Record<string, string>>({})
 
 // 현재 선택된 옵션 라벨(트리거에 표시)
 const selectedLabel = computed(
   () => props.options.find((o) => o.value === props.modelValue)?.label ?? '',
 )
 
+// 트리거 위치 기준으로 메뉴 좌표 계산(뷰포트 fixed)
+function positionMenu(): void {
+  const el = triggerRef.value
+  if (!el) return
+  const r = el.getBoundingClientRect()
+  const style: Record<string, string> = {
+    top: `${r.bottom + 6}px`,
+    minWidth: `${r.width}px`,
+  }
+  if (props.align === 'right') {
+    style.right = `${Math.max(0, window.innerWidth - r.right)}px`
+  } else {
+    style.left = `${r.left}px`
+  }
+  menuStyle.value = style
+}
+
 function toggle(): void {
   open.value = !open.value
+  if (open.value) void nextTick(positionMenu)
 }
 function select(value: T): void {
   emit('update:modelValue', value)
   open.value = false
 }
 
-// 바깥 클릭 / Esc 로 닫기
+// 바깥 클릭(트리거/메뉴 외부) / Esc 로 닫기
 function onDocClick(e: MouseEvent): void {
-  if (open.value && root.value && !root.value.contains(e.target as Node)) {
-    open.value = false
-  }
+  if (!open.value) return
+  const t = e.target as Node
+  if (root.value?.contains(t) || menuRef.value?.contains(t)) return
+  open.value = false
 }
 function onKeydown(e: KeyboardEvent): void {
   if (open.value && e.key === 'Escape') open.value = false
 }
+// 스크롤/리사이즈 시 위치가 어긋나므로 닫는다(간단·안전)
+function onReposition(): void {
+  if (open.value) open.value = false
+}
 onMounted(() => {
   document.addEventListener('click', onDocClick)
   document.addEventListener('keydown', onKeydown)
+  window.addEventListener('scroll', onReposition, true)
+  window.addEventListener('resize', onReposition)
 })
 onBeforeUnmount(() => {
   document.removeEventListener('click', onDocClick)
   document.removeEventListener('keydown', onKeydown)
+  window.removeEventListener('scroll', onReposition, true)
+  window.removeEventListener('resize', onReposition)
 })
 </script>
 
@@ -65,6 +96,7 @@ onBeforeUnmount(() => {
     :class="{ push: pushRight, block }"
   >
     <button
+      ref="triggerRef"
       type="button"
       class="dd-trigger"
       :class="{ open }"
@@ -90,34 +122,37 @@ onBeforeUnmount(() => {
       ><path d="m6 9 6 6 6-6" /></svg>
     </button>
 
-    <ul
-      v-if="open"
-      class="dd-menu"
-      :class="align === 'right' ? 'right' : 'left'"
-      role="listbox"
-    >
-      <li
-        v-for="opt in options"
-        :key="opt.value"
-        class="dd-opt"
-        :class="{ active: opt.value === modelValue }"
-        role="option"
-        :aria-selected="opt.value === modelValue"
-        @click="select(opt.value)"
+    <Teleport to="body">
+      <ul
+        v-if="open"
+        ref="menuRef"
+        class="dd-menu"
+        :style="menuStyle"
+        role="listbox"
       >
-        <span class="dd-opt-label">{{ opt.label }}</span>
-        <svg
-          v-if="opt.value === modelValue"
-          class="dd-check"
-          viewBox="0 0 24 24"
-          fill="none"
-          stroke="currentColor"
-          stroke-width="2.4"
-          stroke-linecap="round"
-          stroke-linejoin="round"
-        ><path d="M20 6 9 17l-5-5" /></svg>
-      </li>
-    </ul>
+        <li
+          v-for="opt in options"
+          :key="opt.value"
+          class="dd-opt"
+          :class="{ active: opt.value === modelValue }"
+          role="option"
+          :aria-selected="opt.value === modelValue"
+          @click="select(opt.value)"
+        >
+          <span class="dd-opt-label">{{ opt.label }}</span>
+          <svg
+            v-if="opt.value === modelValue"
+            class="dd-check"
+            viewBox="0 0 24 24"
+            fill="none"
+            stroke="currentColor"
+            stroke-width="2.4"
+            stroke-linecap="round"
+            stroke-linejoin="round"
+          ><path d="M20 6 9 17l-5-5" /></svg>
+        </li>
+      </ul>
+    </Teleport>
   </div>
 </template>
 
@@ -191,12 +226,10 @@ onBeforeUnmount(() => {
   transform: rotate(180deg);
 }
 
-/* 메뉴 */
+/* 메뉴 — body 로 Teleport, fixed 위치(좌표는 인라인 style) */
 .dd-menu {
-  position: absolute;
-  top: calc(100% + 0.375rem);
-  z-index: 60;
-  min-width: 100%;
+  position: fixed;
+  z-index: 1000;
   margin: 0;
   padding: 0.25rem;
   list-style: none;
@@ -205,12 +238,6 @@ onBeforeUnmount(() => {
   border-radius: var(--radius);
   box-shadow: 0 8px 24px rgba(20, 24, 33, 0.14);
 }
-.dd-menu.left {
-  left: 0;
-}
-.dd-menu.right {
-  right: 0;
-}
 .dd-opt {
   display: flex;
   align-items: center;
diff --git a/frontend/src/pages/relay/TaskDetailPage.vue b/frontend/src/pages/relay/TaskDetailPage.vue
index c9a24f8..b200431 100644
--- a/frontend/src/pages/relay/TaskDetailPage.vue
+++ b/frontend/src/pages/relay/TaskDetailPage.vue
@@ -3576,7 +3576,7 @@ a.file-info {
 /* 보고 열람 모달 */
 .cp-modal {
   width: min(34rem, calc(100vw - 2rem));
-  max-height: calc(100vh - 4rem);
+  max-height: calc(100vh - 3rem);
   display: flex;
   flex-direction: column;
   background: #fff;