diff --git a/frontend/src/components/OrgPermissionTree.test.js b/frontend/src/components/OrgPermissionTree.test.js
index 2620ee9..ad691db 100644
--- a/frontend/src/components/OrgPermissionTree.test.js
+++ b/frontend/src/components/OrgPermissionTree.test.js
@@ -8,10 +8,13 @@ const __dirname = dirname(fileURLToPath(import.meta.url));
 const source = readFileSync(join(__dirname, "OrgPermissionTree.vue"), "utf8");
 
 describe("OrgPermissionTree hierarchy lines", () => {
-  it("draws connector lines so parent-child hierarchy is easier to read", () => {
-    assert.match(source, /\.org-tree-branch::before/);
-    assert.match(source, /\.org-tree-node::before/);
+  it("draws connector lines only between each node and its direct children", () => {
+    assert.match(source, /\.org-tree-children\s*>\s*\.org-tree-branch\s*>\s*\.org-tree-node::before/);
+    assert.match(source, /\.org-tree-children\s*>\s*\.org-tree-branch\s*>\s*\.org-tree-node::after/);
+    assert.doesNotMatch(source, /\.org-tree-children::before/);
+    assert.doesNotMatch(source, /\.org-tree-branch::before/);
     assert.match(source, /--tree-connector-x/);
     assert.match(source, /--tree-connector-color/);
+    assert.match(source, /--tree-connector-width:\s*2px/);
   });
 });
diff --git a/frontend/src/components/OrgPermissionTree.vue b/frontend/src/components/OrgPermissionTree.vue
index 9167ba9..b46801d 100644
--- a/frontend/src/components/OrgPermissionTree.vue
+++ b/frontend/src/components/OrgPermissionTree.vue
@@ -166,14 +166,14 @@ const OrgTreeBranch = defineComponent({
     return () =>
       h("div", {
         class: ["org-tree-branch", { "org-tree-branch-root": branchProps.level === 0 }],
-        style: { "--tree-level": branchProps.level }
+        style: treeLevelStyle(branchProps.level)
       }, [
         h(
           "button",
           {
             type: "button",
             class: ["org-tree-node", { active: isSelected.value }],
-            style: { "--tree-level": branchProps.level },
+            style: treeLevelStyle(branchProps.level),
             onClick: selectCurrent,
             onContextmenu: openMenu
           },
@@ -266,6 +266,13 @@ function organizationChildren(node) {
   return (Array.isArray(node?.children) ? node.children : []).filter(isOrganizationNode);
 }
 
+function treeLevelStyle(level) {
+  return {
+    "--tree-level": level,
+    "--tree-connector-x": `${15 + Number(level || 0) * 22}px`
+  };
+}
+
 function filterOrgTreeByKeyword(nodes, keyword) {
   const normalizedKeyword = String(keyword || "").trim().toLowerCase();
   if (!normalizedKeyword) {
@@ -570,8 +577,9 @@ function removeEmployee(employee) {
 }
 
 .org-tree-list {
-  --tree-connector-color: rgba(64, 158, 255, 0.34);
-  --tree-connector-x: calc(15px + var(--tree-level, 0) * 22px);
+  --tree-connector-color: rgba(37, 99, 235, 0.74);
+  --tree-connector-width: 2px;
+  --tree-connector-arm: 14px;
   display: flex;
   flex: 1;
   flex-direction: column;
@@ -590,26 +598,6 @@ function removeEmployee(employee) {
   gap: 2px;
 }
 
-.org-tree-branch::before {
-  content: "";
-  position: absolute;
-  top: -2px;
-  bottom: -2px;
-  left: var(--tree-connector-x);
-  width: 1px;
-  background: linear-gradient(180deg, transparent, var(--tree-connector-color) 12px, var(--tree-connector-color) calc(100% - 12px), transparent);
-  pointer-events: none;
-}
-
-.org-tree-branch-root::before {
-  content: none;
-}
-
-.org-tree-branch:not(.org-tree-branch-root):last-child::before {
-  bottom: calc(100% - 21px);
-  background: var(--tree-connector-color);
-}
-
 .org-tree-node {
   position: relative;
   display: grid;
@@ -627,14 +615,29 @@ function removeEmployee(employee) {
   transition: background 0.14s ease, color 0.14s ease, box-shadow 0.14s ease;
 }
 
-.org-tree-branch:not(.org-tree-branch-root) > .org-tree-node::before {
+.org-tree-children > .org-tree-branch > .org-tree-node::before {
   content: "";
   position: absolute;
   top: 50%;
-  left: var(--tree-connector-x);
-  width: 14px;
-  height: 1px;
+  left: calc(var(--tree-connector-x) - var(--tree-connector-width) / 2);
+  width: var(--tree-connector-arm);
+  height: var(--tree-connector-width);
   background: var(--tree-connector-color);
+  border-radius: 999px;
+  transform: translateY(-50%);
+  pointer-events: none;
+}
+
+.org-tree-children > .org-tree-branch > .org-tree-node::after {
+  content: "";
+  position: absolute;
+  top: calc(50% - 10px);
+  left: var(--tree-connector-x);
+  width: var(--tree-connector-width);
+  height: 20px;
+  background: var(--tree-connector-color);
+  border-radius: 999px;
+  transform: translateX(-50%);
   pointer-events: none;
 }
 
@@ -708,6 +711,7 @@ function removeEmployee(employee) {
 }
 
 .org-tree-children {
+  position: relative;
   display: flex;
   flex-direction: column;
   gap: 2px;
@@ -794,26 +798,6 @@ function removeEmployee(employee) {
   gap: 2px;
 }
 
-:deep(.org-tree-branch::before) {
-  content: "";
-  position: absolute;
-  top: -2px;
-  bottom: -2px;
-  left: var(--tree-connector-x);
-  width: 1px;
-  background: linear-gradient(180deg, transparent, var(--tree-connector-color) 12px, var(--tree-connector-color) calc(100% - 12px), transparent);
-  pointer-events: none;
-}
-
-:deep(.org-tree-branch-root::before) {
-  content: none;
-}
-
-:deep(.org-tree-branch:not(.org-tree-branch-root):last-child::before) {
-  bottom: calc(100% - 21px);
-  background: var(--tree-connector-color);
-}
-
 :deep(.org-tree-node) {
   position: relative;
   display: grid;
@@ -832,14 +816,29 @@ function removeEmployee(employee) {
   transition: background 0.14s ease, color 0.14s ease, box-shadow 0.14s ease;
 }
 
-:deep(.org-tree-branch:not(.org-tree-branch-root) > .org-tree-node::before) {
+:deep(.org-tree-children > .org-tree-branch > .org-tree-node::before) {
   content: "";
   position: absolute;
   top: 50%;
-  left: var(--tree-connector-x);
-  width: 14px;
-  height: 1px;
+  left: calc(var(--tree-connector-x) - var(--tree-connector-width) / 2);
+  width: var(--tree-connector-arm);
+  height: var(--tree-connector-width);
   background: var(--tree-connector-color);
+  border-radius: 999px;
+  transform: translateY(-50%);
+  pointer-events: none;
+}
+
+:deep(.org-tree-children > .org-tree-branch > .org-tree-node::after) {
+  content: "";
+  position: absolute;
+  top: calc(50% - 10px);
+  left: var(--tree-connector-x);
+  width: var(--tree-connector-width);
+  height: 20px;
+  background: var(--tree-connector-color);
+  border-radius: 999px;
+  transform: translateX(-50%);
   pointer-events: none;
 }
 
@@ -913,6 +912,7 @@ function removeEmployee(employee) {
 }
 
 :deep(.org-tree-children) {
+  position: relative;
   display: flex;
   flex-direction: column;
   gap: 2px;