diff --git a/src/styles/global-popper.scss b/src/styles/global-popper.scss
index e9352c4..18dedfb 100644
--- a/src/styles/global-popper.scss
+++ b/src/styles/global-popper.scss
@@ -87,3 +87,37 @@
 .el-select__wrapper.is-focused {
   box-shadow: 0 0 0 1px var(--brand, #2563EB) inset, 0 0 0 3px var(--brand-glow, rgba(37, 99, 235, 0.18)) !important;
 }
+
+/* === W18.9 全局滚动条暗主题适配 (深色滚动条避免割裂) === */
+/* 默认 (亮主题): 浅灰滚动条 */
+::-webkit-scrollbar {
+  width: 8px;
+  height: 8px;
+}
+::-webkit-scrollbar-track {
+  background: transparent;
+}
+::-webkit-scrollbar-thumb {
+  background: var(--border, #E2E8F0);
+  border-radius: 4px;
+  transition: background 0.15s;
+}
+::-webkit-scrollbar-thumb:hover {
+  background: var(--ink-4, #94A3B8);
+}
+/* Firefox */
+html {
+  scrollbar-color: var(--border, #E2E8F0) transparent;
+  scrollbar-width: thin;
+}
+
+/* 暗主题: 深色滚动条适配, 避免浅白滚动条在深色背景上刺眼 */
+[data-theme="dark"] ::-webkit-scrollbar-thumb {
+  background: var(--border, #475569);
+}
+[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
+  background: var(--ink-3, #CBD5E1);
+}
+[data-theme="dark"] html {
+  scrollbar-color: var(--border, #475569) transparent;
+}