diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index deb827d5..05f6d2ad 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -4,7 +4,15 @@
     <option name="autoReloadType" value="SELECTIVE" />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="4c558d98-824e-4a48-ba48-bd2e6172f9f4" name="更改" comment="修改定位信息 0323" />
+    <list default="true" id="4c558d98-824e-4a48-ba48-bd2e6172f9f4" name="更改" comment="修改定位信息 0323">
+      <change beforePath="$PROJECT_DIR$/backend/src/main/java/com/unis/crm/controller/DashboardController.java" beforeDir="false" afterPath="$PROJECT_DIR$/backend/src/main/java/com/unis/crm/controller/DashboardController.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/backend/src/main/java/com/unis/crm/controller/ExpansionController.java" beforeDir="false" afterPath="$PROJECT_DIR$/backend/src/main/java/com/unis/crm/controller/ExpansionController.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/backend/src/main/java/com/unis/crm/controller/OpportunityController.java" beforeDir="false" afterPath="$PROJECT_DIR$/backend/src/main/java/com/unis/crm/controller/OpportunityController.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/backend/src/main/java/com/unis/crm/controller/OpportunityIntegrationController.java" beforeDir="false" afterPath="$PROJECT_DIR$/backend/src/main/java/com/unis/crm/controller/OpportunityIntegrationController.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/backend/src/main/java/com/unis/crm/controller/WorkController.java" beforeDir="false" afterPath="$PROJECT_DIR$/backend/src/main/java/com/unis/crm/controller/WorkController.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/frontend/src/components/AdaptiveSelect.tsx" beforeDir="false" afterPath="$PROJECT_DIR$/frontend/src/components/AdaptiveSelect.tsx" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/frontend/src/pages/Opportunities.tsx" beforeDir="false" afterPath="$PROJECT_DIR$/frontend/src/pages/Opportunities.tsx" afterDir="false" />
+    </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
     <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
@@ -84,6 +92,9 @@
       <workItem from="1774576185724" duration="1651000" />
       <workItem from="1774763863609" duration="16084000" />
       <workItem from="1775116718799" duration="3143000" />
+      <workItem from="1775182869187" duration="639000" />
+      <workItem from="1775195780460" duration="622000" />
+      <workItem from="1775197297892" duration="43000" />
     </task>
     <task id="LOCAL-00001" summary="修改定位信息 0323">
       <option name="closed" value="true" />
diff --git a/backend/src/main/java/com/unis/crm/controller/DashboardController.java b/backend/src/main/java/com/unis/crm/controller/DashboardController.java
index 6946b325..ee0c2331 100644
--- a/backend/src/main/java/com/unis/crm/controller/DashboardController.java
+++ b/backend/src/main/java/com/unis/crm/controller/DashboardController.java
@@ -3,6 +3,7 @@ package com.unis.crm.controller;
 import com.unis.crm.common.ApiResponse;
 import com.unis.crm.dto.dashboard.DashboardHomeDTO;
 import com.unis.crm.service.DashboardService;
+import com.unisbase.common.annotation.Log;
 import jakarta.validation.constraints.Min;
 import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.GetMapping;
@@ -30,6 +31,7 @@ public class DashboardController {
     }
 
     @PostMapping("/todos/{todoId}/complete")
+    @Log(type = "工作台", value = "完成待办")
     public ApiResponse<Void> completeTodo(
             @RequestHeader("X-User-Id") @Min(1) Long userId,
             @PathVariable("todoId") @Min(1) Long todoId) {
diff --git a/backend/src/main/java/com/unis/crm/controller/ExpansionController.java b/backend/src/main/java/com/unis/crm/controller/ExpansionController.java
index 2f869613..a7f5423c 100644
--- a/backend/src/main/java/com/unis/crm/controller/ExpansionController.java
+++ b/backend/src/main/java/com/unis/crm/controller/ExpansionController.java
@@ -12,6 +12,7 @@ import com.unis.crm.dto.expansion.ExpansionOverviewDTO;
 import com.unis.crm.dto.expansion.UpdateChannelExpansionRequest;
 import com.unis.crm.dto.expansion.UpdateSalesExpansionRequest;
 import com.unis.crm.service.ExpansionService;
+import com.unisbase.common.annotation.Log;
 import jakarta.validation.Valid;
 import java.util.List;
 import org.springframework.web.bind.annotation.GetMapping;
@@ -75,6 +76,7 @@ public class ExpansionController {
     }
 
     @PostMapping("/sales")
+    @Log(type = "拓展管理", value = "新增售前拓展")
     public ApiResponse<Long> createSales(
             @RequestHeader("X-User-Id") Long userId,
             @Valid @RequestBody CreateSalesExpansionRequest request) {
@@ -82,6 +84,7 @@ public class ExpansionController {
     }
 
     @PostMapping("/channel")
+    @Log(type = "拓展管理", value = "新增渠道拓展")
     public ApiResponse<Long> createChannel(
             @RequestHeader("X-User-Id") Long userId,
             @Valid @RequestBody CreateChannelExpansionRequest request) {
@@ -89,6 +92,7 @@ public class ExpansionController {
     }
 
     @PutMapping("/sales/{id}")
+    @Log(type = "拓展管理", value = "编辑售前拓展")
     public ApiResponse<Void> updateSales(
             @RequestHeader("X-User-Id") Long userId,
             @PathVariable("id") Long id,
@@ -98,6 +102,7 @@ public class ExpansionController {
     }
 
     @PutMapping("/channel/{id}")
+    @Log(type = "拓展管理", value = "编辑渠道拓展")
     public ApiResponse<Void> updateChannel(
             @RequestHeader("X-User-Id") Long userId,
             @PathVariable("id") Long id,
@@ -107,6 +112,7 @@ public class ExpansionController {
     }
 
     @PostMapping("/{bizType}/{bizId}/followups")
+    @Log(type = "拓展管理", value = "新增拓展跟进")
     public ApiResponse<Long> createFollowUp(
             @RequestHeader("X-User-Id") Long userId,
             @PathVariable("bizType") String bizType,
diff --git a/backend/src/main/java/com/unis/crm/controller/OpportunityController.java b/backend/src/main/java/com/unis/crm/controller/OpportunityController.java
index 51e5b6e6..4446b9a7 100644
--- a/backend/src/main/java/com/unis/crm/controller/OpportunityController.java
+++ b/backend/src/main/java/com/unis/crm/controller/OpportunityController.java
@@ -9,6 +9,7 @@ import com.unis.crm.dto.opportunity.OpportunityMetaDTO;
 import com.unis.crm.dto.opportunity.OpportunityOverviewDTO;
 import com.unis.crm.dto.opportunity.PushOpportunityToOmsRequest;
 import com.unis.crm.service.OpportunityService;
+import com.unisbase.common.annotation.Log;
 import jakarta.validation.Valid;
 import java.util.List;
 import org.springframework.web.bind.annotation.GetMapping;
@@ -50,6 +51,7 @@ public class OpportunityController {
     }
 
     @PostMapping
+    @Log(type = "商机管理", value = "新增商机")
     public ApiResponse<Long> createOpportunity(
             @RequestHeader("X-User-Id") Long userId,
             @Valid @RequestBody CreateOpportunityRequest request) {
@@ -57,6 +59,7 @@ public class OpportunityController {
     }
 
     @PutMapping("/{opportunityId}")
+    @Log(type = "商机管理", value = "编辑商机")
     public ApiResponse<Long> updateOpportunity(
             @RequestHeader("X-User-Id") Long userId,
             @PathVariable("opportunityId") Long opportunityId,
@@ -65,6 +68,7 @@ public class OpportunityController {
     }
 
     @PostMapping("/{opportunityId}/push-oms")
+    @Log(type = "商机管理", value = "推送商机到OMS")
     public ApiResponse<Long> pushToOms(
             @RequestHeader("X-User-Id") Long userId,
             @PathVariable("opportunityId") Long opportunityId,
@@ -73,6 +77,7 @@ public class OpportunityController {
     }
 
     @PostMapping("/{opportunityId}/followups")
+    @Log(type = "商机管理", value = "新增商机跟进")
     public ApiResponse<Long> createFollowUp(
             @RequestHeader("X-User-Id") Long userId,
             @PathVariable("opportunityId") Long opportunityId,
diff --git a/backend/src/main/java/com/unis/crm/controller/OpportunityIntegrationController.java b/backend/src/main/java/com/unis/crm/controller/OpportunityIntegrationController.java
index 9f4312f6..544d30d0 100644
--- a/backend/src/main/java/com/unis/crm/controller/OpportunityIntegrationController.java
+++ b/backend/src/main/java/com/unis/crm/controller/OpportunityIntegrationController.java
@@ -5,6 +5,7 @@ import com.unis.crm.common.UnauthorizedException;
 import com.unis.crm.config.InternalAuthProperties;
 import com.unis.crm.dto.opportunity.UpdateOpportunityIntegrationRequest;
 import com.unis.crm.service.OpportunityService;
+import com.unisbase.common.annotation.Log;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.validation.Valid;
 import java.util.Objects;
@@ -30,6 +31,7 @@ public class OpportunityIntegrationController {
     }
 
     @PutMapping("/update")
+    @Log(type = "商机集成", value = "同步更新商机")
     public ApiResponse<Long> updateOpportunity(
             HttpServletRequest httpServletRequest,
             @Valid @RequestBody UpdateOpportunityIntegrationRequest request) {
diff --git a/backend/src/main/java/com/unis/crm/controller/WorkController.java b/backend/src/main/java/com/unis/crm/controller/WorkController.java
index 81fbe78c..35b08449 100644
--- a/backend/src/main/java/com/unis/crm/controller/WorkController.java
+++ b/backend/src/main/java/com/unis/crm/controller/WorkController.java
@@ -8,6 +8,7 @@ import com.unis.crm.dto.work.CreateWorkDailyReportRequest;
 import com.unis.crm.dto.work.WorkHistoryPageDTO;
 import com.unis.crm.dto.work.WorkOverviewDTO;
 import com.unis.crm.service.WorkService;
+import com.unisbase.common.annotation.Log;
 import jakarta.validation.Valid;
 import java.math.BigDecimal;
 import org.springframework.core.io.Resource;
@@ -66,6 +67,7 @@ public class WorkController {
     }
 
     @PostMapping("/checkins")
+    @Log(type = "工作管理", value = "提交打卡")
     public ApiResponse<Long> saveCheckIn(
             @RequestHeader("X-User-Id") Long userId,
             @Valid @RequestBody CreateWorkCheckInRequest request) {
@@ -73,6 +75,7 @@ public class WorkController {
     }
 
     @PostMapping(path = "/checkin-photos", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
+    @Log(type = "工作管理", value = "上传打卡照片")
     public ApiResponse<String> uploadCheckInPhoto(
             @RequestHeader("X-User-Id") Long userId,
             @RequestPart("file") MultipartFile file) {
@@ -89,6 +92,7 @@ public class WorkController {
     }
 
     @PostMapping("/daily-reports")
+    @Log(type = "工作管理", value = "提交日报")
     public ApiResponse<Long> saveDailyReport(
             @RequestHeader("X-User-Id") Long userId,
             @Valid @RequestBody CreateWorkDailyReportRequest request) {
diff --git a/frontend/src/components/AdaptiveSelect.tsx b/frontend/src/components/AdaptiveSelect.tsx
index cf842dce..c17a3d3c 100644
--- a/frontend/src/components/AdaptiveSelect.tsx
+++ b/frontend/src/components/AdaptiveSelect.tsx
@@ -10,6 +10,14 @@ export type AdaptiveSelectOption = {
   disabled?: boolean;
 };
 
+function getOptionLabel(option: AdaptiveSelectOption) {
+  const normalizedLabel = typeof option.label === "string" ? option.label.trim() : "";
+  if (normalizedLabel) {
+    return normalizedLabel;
+  }
+  return option.value;
+}
+
 type AdaptiveSelectBaseProps = {
   options: AdaptiveSelectOption[];
   placeholder?: string;
@@ -80,20 +88,25 @@ export function AdaptiveSelect({
   const containerRef = useRef<HTMLDivElement | null>(null);
   const desktopDropdownRef = useRef<HTMLDivElement | null>(null);
   const isMobile = useIsMobileViewport();
-  const [desktopDropdownStyle, setDesktopDropdownStyle] = useState<{ top: number; left: number; width: number } | null>(null);
+  const [desktopDropdownPlacement, setDesktopDropdownPlacement] = useState<"top" | "bottom">("bottom");
+  const [desktopDropdownMaxHeight, setDesktopDropdownMaxHeight] = useState(288);
+  const [desktopDropdownStyle, setDesktopDropdownStyle] = useState<{ left: number; width: number; top: number } | null>(null);
   const selectedValues = multiple
     ? Array.isArray(value) ? value : []
     : typeof value === "string" && value ? [value] : [];
   const selectedLabel = selectedValues.length > 0
     ? selectedValues
-        .map((selectedValue) => options.find((option) => option.value === selectedValue)?.label)
+        .map((selectedValue) => {
+          const matchedOption = options.find((option) => option.value === selectedValue);
+          return matchedOption ? getOptionLabel(matchedOption) : selectedValue;
+        })
         .filter((label): label is string => Boolean(label))
         .join("、")
     : placeholder;
   const normalizedSearchKeyword = searchKeyword.trim().toLowerCase();
   const visibleOptions = searchable && normalizedSearchKeyword
     ? options.filter((option) => {
-        const label = option.label.toLowerCase();
+        const label = getOptionLabel(option).toLowerCase();
         const optionValue = option.value.toLowerCase();
         return label.includes(normalizedSearchKeyword) || optionValue.includes(normalizedSearchKeyword);
       })
@@ -105,12 +118,24 @@ export function AdaptiveSelect({
     }
 
     const rect = containerRef.current.getBoundingClientRect();
+    const viewportHeight = window.innerHeight;
+    const safePadding = 24;
+    const panelChromeHeight = (searchable ? 72 : 16) + 24;
+    const availableBelow = Math.max(180, viewportHeight - rect.bottom - safePadding - panelChromeHeight);
+    const availableAbove = Math.max(180, rect.top - safePadding - panelChromeHeight);
+    const shouldOpenUpward = availableBelow < 280 && availableAbove > availableBelow;
+    const popupContentHeight = Math.min(360, shouldOpenUpward ? availableAbove : availableBelow);
+
+    setDesktopDropdownPlacement(shouldOpenUpward ? "top" : "bottom");
+    setDesktopDropdownMaxHeight(popupContentHeight);
     setDesktopDropdownStyle({
-      top: rect.bottom + 8,
       left: rect.left,
       width: rect.width,
+      top: shouldOpenUpward
+        ? Math.max(safePadding, rect.top - 8 - (popupContentHeight + panelChromeHeight))
+        : rect.bottom + 8,
     });
-  }, [isMobile, open]);
+  }, [isMobile, multiple, open, searchable]);
 
   useEffect(() => {
     if (!open || isMobile) {
@@ -192,9 +217,10 @@ export function AdaptiveSelect({
     const isSelected = multiple
       ? selectedValues.includes(option.value)
       : option.value === value;
+    const optionLabel = getOptionLabel(option);
     return (
       <button
-        key={`${option.value}-${option.label}`}
+        key={`${option.value}-${optionLabel}`}
         type="button"
         disabled={option.disabled}
         onClick={() => handleSelect(option.value)}
@@ -206,7 +232,7 @@ export function AdaptiveSelect({
           option.disabled ? "cursor-not-allowed opacity-50" : "",
         )}
       >
-        <span className="break-anywhere">{option.label}</span>
+        <span className="break-anywhere">{optionLabel}</span>
         {isSelected ? <Check className="h-4 w-4 shrink-0" /> : null}
       </button>
     );
@@ -233,21 +259,18 @@ export function AdaptiveSelect({
         <ChevronDown className={cn("h-4 w-4 shrink-0 text-slate-400 transition-transform", open ? "rotate-180" : "")} />
       </button>
 
-      <AnimatePresence>
-        {open && !isMobile && desktopDropdownStyle && typeof document !== "undefined"
-          ? createPortal(
-              <motion.div
+      {open && !isMobile && desktopDropdownStyle && typeof document !== "undefined"
+        ? createPortal(
+            <div className="pointer-events-none fixed inset-0 z-[220]">
+              <div
                 ref={desktopDropdownRef}
-                initial={{ opacity: 0, y: 8 }}
-                animate={{ opacity: 1, y: 0 }}
-                exit={{ opacity: 0, y: 8 }}
                 style={{
-                  position: "fixed",
-                  top: desktopDropdownStyle.top,
+                  position: "absolute",
                   left: desktopDropdownStyle.left,
                   width: desktopDropdownStyle.width,
+                  top: desktopDropdownStyle.top,
                 }}
-                className="z-[160] rounded-2xl border border-slate-200 bg-white p-2 shadow-2xl dark:border-slate-800 dark:bg-slate-900"
+                className="pointer-events-auto rounded-2xl border border-slate-200 bg-white p-2 shadow-2xl dark:border-slate-800 dark:bg-slate-900"
               >
                 {searchable ? (
                   <div className="mb-2">
@@ -260,18 +283,18 @@ export function AdaptiveSelect({
                     />
                   </div>
                 ) : null}
-                <div className="max-h-72 space-y-1 overflow-y-auto pr-1">
+                <div style={{ maxHeight: `${desktopDropdownMaxHeight}px` }} className="space-y-1 overflow-y-auto pr-1">
                   {visibleOptions.length > 0 ? visibleOptions.map(renderOption) : (
                     <div className="rounded-xl px-3 py-6 text-center text-sm text-slate-500 dark:text-slate-400">
                       未找到匹配选项
                     </div>
                   )}
                 </div>
-              </motion.div>,
-              document.body,
-            )
-          : null}
-      </AnimatePresence>
+              </div>
+            </div>,
+            document.body,
+          )
+        : null}
 
       <AnimatePresence>
         {open && isMobile ? (
diff --git a/frontend/src/pages/Opportunities.tsx b/frontend/src/pages/Opportunities.tsx
index 24fdfd86..0c4529b8 100644
--- a/frontend/src/pages/Opportunities.tsx
+++ b/frontend/src/pages/Opportunities.tsx
@@ -1,6 +1,7 @@
 import { useEffect, useRef, useState, type ReactNode } from "react";
 import { Search, Plus, Download, ChevronDown, Check, Building, Calendar, DollarSign, Activity, X, Clock, FileText, User, Tag, AlertTriangle, ListFilter } from "lucide-react";
 import { motion, AnimatePresence } from "motion/react";
+import { createPortal } from "react-dom";
 import { createOpportunity, getExpansionOverview, getOpportunityMeta, getOpportunityOmsPreSalesOptions, getOpportunityOverview, getStoredCurrentUserId, pushOpportunityToOms, updateOpportunity, type ChannelExpansionItem, type CreateOpportunityPayload, type OmsPreSalesOption, type OpportunityDictOption, type OpportunityFollowUp, type OpportunityItem, type PushOpportunityToOmsPayload, type SalesExpansionItem } from "@/lib/auth";
 import { AdaptiveSelect } from "@/components/AdaptiveSelect";
 import { useIsWecomBrowser } from "@/hooks/useIsWecomBrowser";
@@ -452,6 +453,14 @@ type SearchableOption = {
   keywords?: string[];
 };
 
+function getSearchableOptionLabel(option: SearchableOption) {
+  const normalizedLabel = typeof option.label === "string" ? option.label.trim() : "";
+  if (normalizedLabel) {
+    return normalizedLabel;
+  }
+  return String(option.value ?? "");
+}
+
 function dedupeSearchableOptions(options: SearchableOption[]) {
   const seenValues = new Set<SearchableOption["value"]>();
   return options.filter((option) => {
@@ -514,7 +523,9 @@ function SearchableSelect({
   const [desktopDropdownPlacement, setDesktopDropdownPlacement] = useState<"top" | "bottom">("bottom");
   const [desktopDropdownMaxHeight, setDesktopDropdownMaxHeight] = useState(256);
   const containerRef = useRef<HTMLDivElement | null>(null);
+  const desktopDropdownRef = useRef<HTMLDivElement | null>(null);
   const isMobile = useIsMobileViewport();
+  const [desktopDropdownStyle, setDesktopDropdownStyle] = useState<{ top: number; left: number; width: number } | null>(null);
   const normalizedOptions = dedupeSearchableOptions(options);
   const selectedOption = normalizedOptions.find((item) => item.value === value);
   const normalizedQuery = query.trim().toLowerCase();
@@ -523,7 +534,7 @@ function SearchableSelect({
       return true;
     }
 
-    const haystacks = [item.label, ...(item.keywords ?? [])]
+    const haystacks = [getSearchableOptionLabel(item), ...(item.keywords ?? [])]
       .filter(Boolean)
       .map((entry) => entry.toLowerCase());
 
@@ -532,6 +543,7 @@ function SearchableSelect({
 
   useEffect(() => {
     if (!open || isMobile) {
+      setDesktopDropdownStyle(null);
       return;
     }
 
@@ -550,12 +562,18 @@ function SearchableSelect({
 
       setDesktopDropdownPlacement(shouldOpenUpward ? "top" : "bottom");
       setDesktopDropdownMaxHeight(Math.min(320, shouldOpenUpward ? availableAbove : availableBelow));
+      setDesktopDropdownStyle({
+        top: shouldOpenUpward ? Math.max(safePadding, rect.top - 8) : rect.bottom + 8,
+        left: rect.left,
+        width: rect.width,
+      });
     };
 
     updateDesktopDropdownLayout();
 
     const handlePointerDown = (event: MouseEvent) => {
-      if (!containerRef.current?.contains(event.target as Node)) {
+      const targetNode = event.target as Node;
+      if (!containerRef.current?.contains(targetNode) && !desktopDropdownRef.current?.contains(targetNode)) {
         setOpen(false);
         setQuery("");
       }
@@ -629,7 +647,7 @@ function SearchableSelect({
                   : "text-slate-700 hover:bg-slate-50 dark:text-slate-200 dark:hover:bg-slate-800"
               }`}
             >
-              <span>{item.label}</span>
+              <span>{getSearchableOptionLabel(item)}</span>
               {item.value === value ? <Check className="h-4 w-4 shrink-0" /> : null}
             </button>
           ))
@@ -659,31 +677,37 @@ function SearchableSelect({
         )}
       >
         <span className={selectedOption ? "text-slate-900 dark:text-white" : "text-slate-400 dark:text-slate-500"}>
-          {selectedOption?.label || placeholder}
+          {selectedOption ? getSearchableOptionLabel(selectedOption) : placeholder}
         </span>
         <ChevronDown className={`h-4 w-4 shrink-0 text-slate-400 transition-transform ${open ? "rotate-180" : ""}`} />
       </button>
 
-      <AnimatePresence>
-        {open && !isMobile ? (
-          <motion.div
-            initial={{ opacity: 0, y: 8 }}
-            animate={{ opacity: 1, y: 0 }}
-            exit={{ opacity: 0, y: 8 }}
-            className={cn(
-              "absolute z-20 w-full rounded-2xl border border-slate-200 bg-white p-3 shadow-xl dark:border-slate-800 dark:bg-slate-900",
-              desktopDropdownPlacement === "top" ? "bottom-full mb-2" : "top-full mt-2",
-            )}
-          >
-            <div
-              style={{ maxHeight: `${desktopDropdownMaxHeight}px` }}
-              className="overflow-y-auto overscroll-contain pr-1"
-            >
-              {renderSearchBody()}
-            </div>
-          </motion.div>
-        ) : null}
-      </AnimatePresence>
+      {open && !isMobile && desktopDropdownStyle && typeof document !== "undefined"
+        ? createPortal(
+            <div className="pointer-events-none fixed inset-0 z-[220]">
+              <div
+                ref={desktopDropdownRef}
+                style={{
+                  position: "absolute",
+                  top: desktopDropdownPlacement === "top"
+                    ? Math.max(24, desktopDropdownStyle.top - Math.min(desktopDropdownMaxHeight, 320))
+                    : desktopDropdownStyle.top,
+                  left: desktopDropdownStyle.left,
+                  width: desktopDropdownStyle.width,
+                }}
+                className="pointer-events-auto rounded-2xl border border-slate-200 bg-white p-3 shadow-2xl dark:border-slate-800 dark:bg-slate-900"
+              >
+                <div
+                  style={{ maxHeight: `${desktopDropdownMaxHeight}px` }}
+                  className="overflow-y-auto overscroll-contain pr-1"
+                >
+                  {renderSearchBody()}
+                </div>
+              </div>
+            </div>,
+            document.body,
+          )
+        : null}
 
       <AnimatePresence>
         {open && isMobile ? (
@@ -748,23 +772,61 @@ function CompetitorMultiSelect({
 }) {
   const [open, setOpen] = useState(false);
   const containerRef = useRef<HTMLDivElement | null>(null);
+  const desktopDropdownRef = useRef<HTMLDivElement | null>(null);
   const isMobile = useIsMobileViewport();
+  const [desktopDropdownPlacement, setDesktopDropdownPlacement] = useState<"top" | "bottom">("bottom");
+  const [desktopDropdownMaxHeight, setDesktopDropdownMaxHeight] = useState(320);
+  const [desktopDropdownStyle, setDesktopDropdownStyle] = useState<{ left: number; width: number; top: number } | null>(null);
 
   const summary = value.length > 0 ? value.join("、") : placeholder;
 
   useEffect(() => {
     if (!open || isMobile) {
+      setDesktopDropdownStyle(null);
       return;
     }
 
+    const updateDesktopDropdownPosition = () => {
+      const rect = containerRef.current?.getBoundingClientRect();
+      if (!rect) {
+        return;
+      }
+
+      const viewportHeight = window.innerHeight;
+      const safePadding = 24;
+      const panelChromeHeight = 132;
+      const availableBelow = Math.max(180, viewportHeight - rect.bottom - safePadding - panelChromeHeight);
+      const availableAbove = Math.max(180, rect.top - safePadding - panelChromeHeight);
+      const shouldOpenUpward = availableBelow < 300 && availableAbove > availableBelow;
+      const popupContentHeight = Math.min(360, shouldOpenUpward ? availableAbove : availableBelow);
+
+      setDesktopDropdownPlacement(shouldOpenUpward ? "top" : "bottom");
+      setDesktopDropdownMaxHeight(popupContentHeight);
+
+      setDesktopDropdownStyle({
+        left: rect.left,
+        width: rect.width,
+        top: shouldOpenUpward
+          ? Math.max(safePadding, rect.top - 8 - (popupContentHeight + panelChromeHeight))
+          : rect.bottom + 8,
+      });
+    };
+
+    updateDesktopDropdownPosition();
+
     const handlePointerDown = (event: MouseEvent) => {
-      if (!containerRef.current?.contains(event.target as Node)) {
+      const targetNode = event.target as Node;
+      if (!containerRef.current?.contains(targetNode) && !desktopDropdownRef.current?.contains(targetNode)) {
         setOpen(false);
       }
     };
 
+    window.addEventListener("resize", updateDesktopDropdownPosition);
+    window.addEventListener("scroll", updateDesktopDropdownPosition, true);
     document.addEventListener("mousedown", handlePointerDown);
     return () => {
+      window.removeEventListener("resize", updateDesktopDropdownPosition);
+      window.removeEventListener("scroll", updateDesktopDropdownPosition, true);
       document.removeEventListener("mousedown", handlePointerDown);
     };
   }, [isMobile, open]);
@@ -852,22 +914,31 @@ function CompetitorMultiSelect({
         <ChevronDown className={cn("h-4 w-4 shrink-0 text-slate-400 transition-transform", open && "rotate-180")} />
       </button>
 
-      <AnimatePresence>
-        {open && !isMobile ? (
-          <motion.div
-            initial={{ opacity: 0, y: 8 }}
-            animate={{ opacity: 1, y: 0 }}
-            exit={{ opacity: 0, y: 8 }}
-            className="absolute z-20 mt-2 w-full rounded-2xl border border-slate-200 bg-white p-3 shadow-xl dark:border-slate-800 dark:bg-slate-900"
-          >
-            <div className="mb-3">
-              <p className="text-sm font-semibold text-slate-900 dark:text-white">竞争对手</p>
-              <p className="crm-field-note mt-1">支持多选，选择“其他”后可手动录入。</p>
-            </div>
-            {renderOptions()}
-          </motion.div>
-        ) : null}
-      </AnimatePresence>
+      {open && !isMobile && desktopDropdownStyle && typeof document !== "undefined"
+        ? createPortal(
+            <div className="pointer-events-none fixed inset-0 z-[220]">
+              <div
+                ref={desktopDropdownRef}
+                style={{
+                  position: "absolute",
+                  left: desktopDropdownStyle.left,
+                  width: desktopDropdownStyle.width,
+                  top: desktopDropdownStyle.top,
+                }}
+                className="pointer-events-auto rounded-2xl border border-slate-200 bg-white p-3 shadow-2xl dark:border-slate-800 dark:bg-slate-900"
+              >
+                <div className="mb-3 shrink-0">
+                  <p className="text-sm font-semibold text-slate-900 dark:text-white">竞争对手</p>
+                  <p className="crm-field-note mt-1">支持多选，选择“其他”后可手动录入。</p>
+                </div>
+                <div style={{ maxHeight: `${desktopDropdownMaxHeight}px` }} className="overflow-y-auto pr-1">
+                  {renderOptions()}
+                </div>
+              </div>
+            </div>,
+            document.body,
+          )
+        : null}
 
       <AnimatePresence>
         {open && isMobile ? (