diff --git a/start.sh b/start.sh
index 0e3e1b1..6927801 100755
--- a/start.sh
+++ b/start.sh
@@ -88,12 +88,18 @@ run_deploy_questions() {
     if [ "$DEPLOY_MODE" = "ip" ]; then
         # 2. 输入服务器 IP
         prompt_or_env DEPLOY_IP "2. 请输入服务器 IP 地址" "DEPLOY_IP" ""
-        [ -z "$DEPLOY_IP" ] && { echo "❌ IP 不能为空"; exit 1; }
+        if [ -z "$DEPLOY_IP" ]; then
+            echo "❌ IP 不能为空"
+            exit 1
+        fi
         echo "   请确保防火墙已放行 3001、3002、3003 端口"
     else
         # 3. 输入域名
         prompt_or_env DEPLOY_DOMAIN "3. 请输入域名（不含 https:// 前缀，如 51easyai.com）" "DEPLOY_DOMAIN" ""
-        [ -z "$DEPLOY_DOMAIN" ] && { echo "❌ 域名不能为空"; exit 1; }
+        if [ -z "$DEPLOY_DOMAIN" ]; then
+            echo "❌ 域名不能为空"
+            exit 1
+        fi
 
         # 3.1 是否启用 HTTPS
         if [ -n "$DEPLOY_HTTPS_INPUT" ]; then
@@ -105,7 +111,9 @@ run_deploy_questions() {
                 DEPLOY_HTTPS=true
             fi
         fi
-        [ "$DEPLOY_HTTPS" = true ] && echo "   启用 HTTPS 需确保防火墙已放行 80、443 端口"
+        if [ "$DEPLOY_HTTPS" = true ]; then
+            echo "   启用 HTTPS 需确保防火墙已放行 80、443 端口"
+        fi
     fi
 }
 
@@ -115,9 +123,18 @@ setup_env_files() {
     echo "📝 配置环境文件..."
 
     # 6. 复制 .env.tools、.env.ASG、.env.AMS（无 example 后缀的从 .sample 生成）
-    [ ! -f .env.tools ] && cp .env.tools.sample .env.tools && echo "   ✓ .env.tools"
-    [ ! -f .env.ASG ] && cp .env.ASG.sample .env.ASG && echo "   ✓ .env.ASG"
-    [ ! -f .env.AMS ] && cp .env.AMS.sample .env.AMS && echo "   ✓ .env.AMS"
+    if [ ! -f .env.tools ]; then
+        cp .env.tools.sample .env.tools
+        echo "   ✓ .env.tools"
+    fi
+    if [ ! -f .env.ASG ]; then
+        cp .env.ASG.sample .env.ASG
+        echo "   ✓ .env.ASG"
+    fi
+    if [ ! -f .env.AMS ]; then
+        cp .env.AMS.sample .env.AMS
+        echo "   ✓ .env.AMS"
+    fi
 
     # 4/5. 配置 .env
     if [ ! -f .env ]; then
@@ -167,7 +184,9 @@ install_docker() {
     fi
     OS_VERSION_ID=$(grep -oP '(?<=^VERSION_ID=")[0-9.]+' /etc/os-release 2>/dev/null | cut -d'.' -f1 || echo "0")
     OS_CODENAME=""
-    [[ "$OS_FAMILY" == "Ubuntu" ]] && OS_CODENAME=$(lsb_release -cs 2>/dev/null || (grep VERSION_CODENAME /etc/os-release 2>/dev/null | cut -d= -f2 | tr -d '"'))
+    if [[ "$OS_FAMILY" == "Ubuntu" ]]; then
+        OS_CODENAME=$(lsb_release -cs 2>/dev/null || (grep VERSION_CODENAME /etc/os-release 2>/dev/null | cut -d= -f2 | tr -d '"'))
+    fi
 
     UBUNTU_DOCKER_MIRROR_URL="https://mirrors.ustc.edu.cn/docker-ce"
     UBUNTU_DOCKER_GPG_URL="https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu/gpg"
@@ -269,9 +288,15 @@ main() {
     if [ "$DEPLOY_MODE" != "skip" ]; then
         setup_env_files
     else
-        [ ! -f .env.tools ] && cp .env.tools.sample .env.tools
-        [ ! -f .env.ASG ] && cp .env.ASG.sample .env.ASG
-        [ ! -f .env.AMS ] && cp .env.AMS.sample .env.AMS
+        if [ ! -f .env.tools ]; then
+            cp .env.tools.sample .env.tools
+        fi
+        if [ ! -f .env.ASG ]; then
+            cp .env.ASG.sample .env.ASG
+        fi
+        if [ ! -f .env.AMS ]; then
+            cp .env.AMS.sample .env.AMS
+        fi
     fi
 
     if [ "$DEPLOY_DRY_RUN" = "1" ]; then
@@ -292,7 +317,9 @@ main() {
         echo "访问地址: http://${DEPLOY_IP}:3010"
     elif [ "$DEPLOY_MODE" = "domain" ] && [ -n "$DEPLOY_DOMAIN" ]; then
         echo "访问地址: http://${DEPLOY_DOMAIN} (配置 Nginx 后)"
-        [ "$DEPLOY_HTTPS" = true ] && echo "HTTPS 已启用"
+        if [ "$DEPLOY_HTTPS" = true ]; then
+            echo "HTTPS 已启用"
+        fi
     fi
     echo ""
 }