diff --git a/apps/web_v1/scripts/structure-check.mjs b/apps/web_v1/scripts/structure-check.mjs
index 13bef57..40beb3e 100644
--- a/apps/web_v1/scripts/structure-check.mjs
+++ b/apps/web_v1/scripts/structure-check.mjs
@@ -42,6 +42,11 @@ for (const forbidden of ['森林Agent', 'SenlinAI Workbench']) {
   }
 }
 
+const projectRailSource = readFileSync('src/pages/projects/project-rail.tsx', 'utf8')
+if (!projectRailSource.includes('projectNameLabel(project.name)')) {
+  failures.push('project rail labels must derive from the project name')
+}
+
 if (existsSync('src/App.tsx')) {
   failures.push('legacy src/App.tsx should be removed after page split')
 }
diff --git a/apps/web_v1/src/App.css b/apps/web_v1/src/App.css
index 74b45ea..a14a2d7 100644
--- a/apps/web_v1/src/App.css
+++ b/apps/web_v1/src/App.css
@@ -360,11 +360,14 @@
 .project-button {
   width: 48px;
   height: 48px;
+  padding: 0 4px;
   border: 1px solid var(--senlin-border);
   border-radius: 8px;
   background: color-mix(in srgb, var(--project-color) 9%, white);
   color: var(--project-color);
+  font-size: 12px;
   font-weight: 700;
+  overflow: hidden;
   cursor: pointer;
 }
 
diff --git a/apps/web_v1/src/pages/projects/project-rail.tsx b/apps/web_v1/src/pages/projects/project-rail.tsx
index 0d8bb10..7e0f0b0 100644
--- a/apps/web_v1/src/pages/projects/project-rail.tsx
+++ b/apps/web_v1/src/pages/projects/project-rail.tsx
@@ -47,7 +47,7 @@ export function ProjectRail({
               style={{ '--project-color': project.color } as CSSProperties}
               title={project.name}
             >
-              {project.short}
+              {projectNameLabel(project.name)}
             </button>
           </Badge>
         ))}
@@ -56,3 +56,9 @@ export function ProjectRail({
     </Sider>
   )
 }
+
+function projectNameLabel(name: string) {
+  const characters = Array.from(name.trim())
+  const limit = characters.some((character) => /\p{Script=Han}/u.test(character)) ? 2 : 4
+  return characters.slice(0, limit).join('')
+}