diff --git a/create_new_domain_cert.sh b/create_new_domain_cert.sh
new file mode 100644
index 0000000..6ffc346
--- /dev/null
+++ b/create_new_domain_cert.sh
@@ -0,0 +1,617 @@
+#!/bin/bash
+#
+# 脚本名称: create_new_domain_cert.sh
+# 功能: 为新域名自动创建 Let's Encrypt SSL 证书
+# 作者: Assistant
+# 日期: 2026-03-22
+# 用法:
+#   sudo ./create_new_domain_cert.sh
+#
+#   交互式输入：
+#     - 域名 (例如: example.com)
+#     - 后端服务端口 (例如: 3000)
+#     - 证书存放目录 (例如: /etc/ssl/certs/example.com)
+#
+# 前提条件:
+#   - 需要 root 权限运行
+#   - 需要安装 nginx
+#   - 需要开放 80 和 443 端口
+#
+# sudo chmod +x create_new_domain_cert.sh
+
+# ================= 配置区域 =================
+ACME_SH="/root/.acme.sh/acme.sh"
+WEBROOT="/var/www/letsencrypt"
+NGINX_CONF_DIR="/etc/nginx/conf.d"
+NGINX_AVAILABLE="/etc/nginx/sites-available"
+NGINX_ENABLED="/etc/nginx/sites-enabled"
+EMAIL="admin@$(hostname -f)"
+# ===========================================
+
+# 彩色输出（方便阅读）
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+CYAN='\033[0;36m'
+NC='\033[0m' # No Color
+
+# 日志函数 - 中文输出
+log_info()    { echo -e "${GREEN}[INFO]${NC} $(date '+%Y-%m-%d %H:%M:%S') - $1" | tee -a "$LOG_FILE"; }
+log_warn()    { echo -e "${YELLOW}[警告]${NC} $(date '+%Y-%m-%d %H:%M:%S') - $1" | tee -a "$LOG_FILE"; }
+log_error()   { echo -e "${RED}[错误]${NC} $(date '+%Y-%m-%d %H:%M:%S') - $1" | tee -a "$LOG_FILE"; }
+log_step()    { echo -e "${BLUE}[步骤]${NC} $(date '+%Y-%m-%d %H:%M:%S') - $1" | tee -a "$LOG_FILE"; }
+log_success() { echo -e "${CYAN}[完成]${NC} $(date '+%Y-%m-%d %H:%M:%S') - $1" | tee -a "$LOG_FILE"; }
+
+# 全局变量
+DOMAIN=""
+BACKEND_PORT=""
+CERT_DIR=""
+LOG_FILE=""
+HTTP_CONF_FILE=""
+HTTPS_CONF_FILE=""
+
+# 检查是否 root 权限
+check_root() {
+    if [[ $EUID -ne 0 ]]; then
+        log_error "请使用 root 权限运行此脚本"
+        exit 1
+    fi
+}
+
+# 交互式收集参数
+input_parameters() {
+    echo ""
+    echo -e "${BLUE}========================================${NC}"
+    echo -e "${BLUE}   🆕 新域名 SSL 证书创建向导 ${NC}"
+    echo -e "${BLUE}========================================${NC}"
+    echo ""
+
+    # 收集域名
+    while true; do
+        read -p "$(echo -e "${CYAN}[输入]${NC} 请输入域名（例如：example.com）: ")" DOMAIN
+        if [[ -z "$DOMAIN" ]]; then
+            log_error "域名不能为空"
+            continue
+        fi
+        # 简单的域名格式验证
+        if [[ ! "$DOMAIN" =~ ^[a-zA-Z0-9][a-zA-Z0-9\.-]*\.[a-zA-Z]{2,}$ ]]; then
+            log_error "域名格式不正确，请重新输入"
+            continue
+        fi
+        break
+    done
+
+    # 收集后端端口
+    while true; do
+        read -p "$(echo -e "${CYAN}[输入]${NC} 请输入后端服务端口（例如：3000）: ")" BACKEND_PORT
+        if [[ -z "$BACKEND_PORT" ]]; then
+            log_error "端口不能为空"
+            continue
+        fi
+        # 端口必须是数字
+        if [[ ! "$BACKEND_PORT" =~ ^[0-9]+$ ]] || [[ $BACKEND_PORT -lt 1 ]] || [[ $BACKEND_PORT -gt 65535 ]]; then
+            log_error "端口号必须在 1-65535 之间"
+            continue
+        fi
+        break
+    done
+
+    # 收集证书目录
+    read -p "$(echo -e "${CYAN}[输入]${NC} 请输入证书存放目录（默认：/etc/ssl/certs/${DOMAIN}）: ")" INPUT_CERT_DIR
+    if [[ -z "$INPUT_CERT_DIR" ]]; then
+        CERT_DIR="/etc/ssl/certs/${DOMAIN}"
+    else
+        CERT_DIR="$INPUT_CERT_DIR"
+    fi
+
+    # 设置日志文件
+    LOG_FILE="/var/log/provision-${DOMAIN}.log"
+
+    # 设置配置文件路径
+    HTTP_CONF_FILE="${NGINX_CONF_DIR}/${DOMAIN}.http.conf"
+    HTTPS_CONF_FILE="${NGINX_CONF_DIR}/${DOMAIN}.https.conf"
+
+    echo ""
+    log_info "📋 配置汇总:"
+    echo "   域名: $DOMAIN"
+    echo "   端口: $BACKEND_PORT"
+    echo "   证书目录: $CERT_DIR"
+    echo "   日志文件: $LOG_FILE"
+    echo ""
+}
+
+# 检查并安装 acme.sh
+install_acme_sh() {
+    log_step "检查 acme.sh 安装状态..."
+
+    if [[ -f "$ACME_SH" ]]; then
+        log_success "acme.sh 已安装: $ACME_SH"
+
+        # 检查是否需要升级
+        local version=$("$ACME_SH" --version 2>/dev/null | head -n1)
+        log_info "当前版本: $version"
+
+        echo ""
+        read -p "$(echo -e "${YELLOW}[确认]${NC} 是否升级 acme.sh 到最新版本? [y/N]: ")" upgrade
+        if [[ "$upgrade" =~ ^[Yy]$ ]]; then
+            log_info "正在升级 acme.sh..."
+            if "$ACME_SH" --upgrade --auto-upgrade; then
+                log_success "acme.sh 升级成功"
+            else
+                log_warn "升级失败，继续使用当前版本"
+            fi
+        fi
+    else
+        log_warn "未检测到 acme.sh，开始自动安装..."
+
+        # 自动安装 acme.sh
+        log_info "执行安装命令: curl https://get.acme.sh | sh -s email=$EMAIL"
+        if curl https://get.acme.sh | sh -s email=$EMAIL; then
+            log_success "acme.sh 安装成功"
+
+            # 验证安装
+            if [[ -f "$ACME_SH" ]]; then
+                log_info "验证安装: $ACME_SH"
+            else
+                log_error "acme.sh 安装验证失败"
+                exit 1
+            fi
+        else
+            log_error "acme.sh 安装失败，请检查网络连接"
+            exit 1
+        fi
+    fi
+
+    # 设置默认 CA
+    log_info "设置默认 CA 为 Let's Encrypt..."
+    "$ACME_SH" --set-default-ca --server letsencrypt >/dev/null 2>&1 || true
+}
+
+# 创建并授权 webroot 目录
+setup_webroot() {
+    log_step "创建并授权 webroot 目录..."
+
+    if [[ ! -d "$WEBROOT" ]]; then
+        log_info "创建 webroot 目录: $WEBROOT"
+        mkdir -p "$WEBROOT"
+    else
+        log_success "webroot 目录已存在: $WEBROOT"
+    fi
+
+    # 设置权限
+    chown -R www-data:www-data "$WEBROOT"
+    chmod -R 755 "$WEBROOT"
+
+    log_success "webroot 目录权限设置完成"
+    log_info "所有者: www-data:www-data"
+    log_info "权限: 755"
+}
+
+# 备份旧配置（幂等性支持）
+backup_old_configs() {
+    log_step "检查并备份旧配置..."
+
+    local backup_count=0
+    local timestamp=$(date +%s)
+
+    # 备份 HTTP 配置
+    if [[ -f "$HTTP_CONF_FILE" ]]; then
+        local backup_file="${HTTP_CONF_FILE}.bak-${timestamp}"
+        mv "$HTTP_CONF_FILE" "$backup_file"
+        log_info "已备份 HTTP 配置: $backup_file"
+        backup_count=$((backup_count + 1))
+    fi
+
+    # 备份 HTTPS 配置
+    if [[ -f "$HTTPS_CONF_FILE" ]]; then
+        local backup_file="${HTTPS_CONF_FILE}.bak-${timestamp}"
+        mv "$HTTPS_CONF_FILE" "$backup_file"
+        log_info "已备份 HTTPS 配置: $backup_file"
+        backup_count=$((backup_count + 1))
+    fi
+
+    # 备份证书目录
+    if [[ -d "$CERT_DIR" ]] && [[ -n "$(ls -A $CERT_DIR 2>/dev/null)" ]]; then
+        local backup_dir="${CERT_DIR}.bak-${timestamp}"
+        cp -r "$CERT_DIR" "$backup_dir"
+        log_info "已备份证书目录: $backup_dir"
+        backup_count=$((backup_count + 1))
+    fi
+
+    if [[ $backup_count -eq 0 ]]; then
+        log_info "未发现旧配置，无需备份"
+    else
+        log_success "共备份 $backup_count 个旧配置"
+    fi
+}
+
+# 检查证书是否已存在且未过期
+check_existing_certificate() {
+    log_step "检查现有证书..."
+
+    # 使用 acme.sh --list 查看已颁发的证书
+    local cert_list=$("$ACME_SH" --list 2>/dev/null)
+
+    if echo "$cert_list" | grep -q "$DOMAIN"; then
+        log_warn "发现已存在的证书: $DOMAIN"
+
+        # 检查证书是否即将过期
+        local cert_file="$("$ACME_SH" --list | grep "^$DOMAIN" | awk '{print $5}')"
+        if [[ -n "$cert_file" ]] && [[ -f "$cert_file" ]]; then
+            local expire_date=$(openssl x509 -in "$cert_file" -noout -enddate 2>/dev/null | cut -d= -f2)
+            local expire_timestamp=$(date -d "$expire_date" +%s 2>/dev/null)
+            local now_timestamp=$(date +%s)
+            local days_left=$(( (expire_timestamp - now_timestamp) / 86400 ))
+
+            log_info "证书过期时间: $expire_date"
+            log_info "距离过期还有: ${days_left} 天"
+
+            if [[ $days_left -gt 30 ]]; then
+                echo ""
+                echo -e "${YELLOW}现有证书仍在有效期内（>30天），请选择操作:${NC}"
+                echo "1) 跳过证书申请，直接安装现有证书"
+                echo "2) 强制重新申请证书 (Force Renew)"
+                echo "3) 退出脚本"
+                read -p "请输入选项 [1-3]: " choice
+
+                case "$choice" in
+                    1)
+                        log_info "用户选择: 跳过证书申请，使用现有证书"
+                        return 0
+                        ;;
+                    2)
+                        log_info "用户选择: 强制重新申请证书"
+                        return 1
+                        ;;
+                    *)
+                        log_info "用户选择退出"
+                        exit 0
+                        ;;
+                esac
+            else
+                log_warn "证书即将过期（<30天），将重新申请"
+                return 1
+            fi
+        fi
+    fi
+
+    log_info "未找到现有证书，将申请新证书"
+    return 1
+}
+
+# 生成临时 HTTP 配置用于 ACME 验证
+generate_http_config() {
+    log_step "生成临时 HTTP 配置..."
+
+    cat > "$HTTP_CONF_FILE" <<EOF
+server {
+    listen 80;
+    listen [::]:80;
+    server_name ${DOMAIN};
+
+    # ACME 挑战目录
+    location /.well-known/acme-challenge/ {
+        root ${WEBROOT};
+        allow all;
+    }
+
+    # 其他请求代理到后端服务作为兜底
+    location / {
+        proxy_pass http://localhost:${BACKEND_PORT};
+        proxy_set_header Host \$host;
+        proxy_set_header X-Real-IP \$remote_addr;
+        proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto \$scheme;
+    }
+}
+EOF
+
+    log_success "HTTP 配置已生成: $HTTP_CONF_FILE"
+}
+
+# 验证并重载 nginx
+reload_nginx() {
+    log_step "验证 nginx 配置..."
+
+    if ! nginx -t; then
+        log_error "nginx 配置验证失败，请检查配置文件"
+        cat "$HTTP_CONF_FILE"
+        exit 1
+    fi
+
+    log_success "nginx 配置验证通过"
+
+    log_step "重载 nginx 服务..."
+
+    if systemctl reload nginx >/dev/null 2>&1; then
+        log_success "nginx 重载成功"
+    elif service nginx reload >/dev/null 2>&1; then
+        log_success "nginx 重载成功 (service 命令)"
+    elif nginx -s reload >/dev/null 2>&1; then
+        log_success "nginx 重载成功 (nginx -s)"
+    else
+        log_error "nginx 重载失败，请手动执行: systemctl reload nginx"
+        exit 1
+    fi
+}
+
+# 检测域名 80 端口可达性
+check_domain_reachability() {
+    log_step "检测域名 80 端口可达性..."
+
+    local test_url="http://${DOMAIN}/.well-known/acme-challenge/test"
+    log_info "测试 URL: $test_url"
+
+    local response
+    response=$(curl -I -s --connect-timeout 10 "$test_url" 2>&1)
+    local http_code=$(echo "$response" | grep -i "HTTP/" | head -n1 | awk '{print $2}')
+
+    log_info "HTTP 响应码: ${http_code:-无响应}"
+
+    # 返回 200 或 404 都视为通过（说明 nginx 已响应）
+    if [[ "$http_code" == "200" ]] || [[ "$http_code" == "404" ]]; then
+        log_success "域名 80 端口可达性检测通过"
+        return 0
+    else
+        log_error "域名 80 端口不可达，请检查:"
+        echo "  1. 域名是否正确解析到此服务器"
+        echo "  2. 防火墙是否开放 80 端口"
+        echo "  3. nginx 是否正常启动"
+        echo ""
+        echo "  完整响应: $response"
+        return 1
+    fi
+}
+
+# 申请 Let's Encrypt 证书
+issue_certificate() {
+    log_step "申请 Let's Encrypt 证书..."
+
+    log_info "执行命令: $ACME_SH --issue -d $DOMAIN --webroot $WEBROOT"
+    echo ""
+
+    # 捕获输出用于分析
+    local tmp_out=$(mktemp)
+    local tmp_err=$(mktemp)
+
+    "$ACME_SH" --issue -d "$DOMAIN" --webroot "$WEBROOT" > >(tee "$tmp_out") 2> >(tee "$tmp_err" >&2)
+    local ret=$?
+
+    # 分析结果
+    if [[ $ret -eq 0 ]]; then
+        # 检查输出是否包含证书内容
+        if grep -q "-----END CERTIFICATE-----" "$tmp_out" || grep -q "-----END CERTIFICATE-----" "$tmp_err"; then
+            log_success "✅ 证书申请成功！"
+            rm -f "$tmp_out" "$tmp_err"
+            return 0
+        else
+            log_warn "证书申请命令返回成功，但未检测到证书内容"
+            log_info "输出内容:"
+            cat "$tmp_out"
+            cat "$tmp_err"
+            rm -f "$tmp_out" "$tmp_err"
+            return 0
+        fi
+    else
+        log_error "❌ 证书申请失败 (返回码: $ret)"
+        echo ""
+        echo "========== 错误输出 =========="
+        cat "$tmp_err"
+        echo "=============================="
+        echo ""
+        log_error "请检查日志: $LOG_FILE"
+        rm -f "$tmp_out" "$tmp_err"
+        exit 1
+    fi
+}
+
+# 安装证书到指定位置
+install_certificate() {
+    log_step "安装证书到指定目录..."
+
+    # 确保目录存在
+    mkdir -p "$CERT_DIR"
+
+    log_info "证书安装目录: $CERT_DIR"
+
+    # 使用 acme.sh 安装证书
+    local install_cmd="$ACME_SH --install-cert -d $DOMAIN \
+        --key-file       ${CERT_DIR}/key.pem \
+        --fullchain-file ${CERT_DIR}/cert.pem \
+        --reloadcmd      \"systemctl force-reload nginx\""
+
+    log_info "执行安装命令..."
+    echo "$install_cmd" | tee -a "$LOG_FILE"
+
+    if eval "$install_cmd"; then
+        log_success "证书安装成功"
+    else
+        log_error "证书安装失败"
+        exit 1
+    fi
+
+    # 设置文件权限
+    log_step "设置证书文件权限..."
+
+    if chown www-data:www-data "${CERT_DIR}"/*.pem 2>/dev/null; then
+        log_success "文件所有者已设置为 www-data:www-data"
+    else
+        log_warn "chown 执行失败，请手动检查权限"
+    fi
+
+    if chmod 600 "${CERT_DIR}"/*.pem 2>/dev/null; then
+        log_success "文件权限已设置为 600"
+    else
+        log_warn "chmod 执行失败，请手动检查权限"
+    fi
+
+    # 验证证书文件
+    log_step "验证证书文件..."
+    if [[ -f "${CERT_DIR}/cert.pem" ]]; then
+        log_success "证书文件存在: ${CERT_DIR}/cert.pem"
+        openssl x509 -in "${CERT_DIR}/cert.pem" -noout -subject -dates 2>/dev/null | tee -a "$LOG_FILE"
+    else
+        log_error "证书文件不存在: ${CERT_DIR}/cert.pem"
+        exit 1
+    fi
+
+    if [[ -f "${CERT_DIR}/key.pem" ]]; then
+        log_success "密钥文件存在: ${CERT_DIR}/key.pem"
+    else
+        log_error "密钥文件不存在: ${CERT_DIR}/key.pem"
+        exit 1
+    fi
+}
+
+# 生成最终 HTTPS 配置
+generate_https_config() {
+    log_step "生成 HTTPS 配置..."
+
+    cat > "$HTTPS_CONF_FILE" <<EOF
+# HTTP 到 HTTPS 的强制跳转
+server {
+    listen 80;
+    listen [::]:80;
+    server_name ${DOMAIN};
+    return 301 https://$host$request_uri;
+}
+
+# HTTPS 服务器块
+server {
+    listen 443 ssl http2;
+    listen [::]:443 ssl http2;
+    server_name ${DOMAIN};
+
+    # SSL 证书配置
+    ssl_certificate     ${CERT_DIR}/cert.pem;
+    ssl_certificate_key ${CERT_DIR}/key.pem;
+
+    # SSL 安全配置
+    ssl_protocols TLSv1.2 TLSv1.3;
+    ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384;
+    ssl_prefer_server_ciphers off;
+
+    # HSTS 配置（可选，取消注释以启用）
+    # add_header Strict-Transport-Security "max-age=31536000" always;
+
+    # 日志配置
+    access_log /var/log/nginx/${DOMAIN}.access.log;
+    error_log /var/log/nginx/${DOMAIN}.error.log;
+
+    # 后端服务代理
+    location / {
+        proxy_pass http://localhost:${BACKEND_PORT};
+        proxy_set_header Host \$host;
+        proxy_set_header X-Real-IP \$remote_addr;
+        proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto \$scheme;
+    }
+}
+EOF
+
+    log_success "HTTPS 配置已生成: $HTTPS_CONF_FILE"
+}
+
+# 最终验证
+final_verification() {
+    log_step "最终验证..."
+
+    # 删除临时 HTTP 配置（不再需要）
+    if [[ -f "$HTTP_CONF_FILE" ]]; then
+        rm -f "$HTTP_CONF_FILE"
+        log_info "已删除临时 HTTP 配置"
+    fi
+
+    # 验证 nginx 配置
+    log_info "验证 nginx 配置..."
+    if ! nginx -t; then
+        log_error "nginx 配置验证失败"
+        exit 1
+    fi
+    log_success "nginx 配置验证通过"
+
+    # 重载 nginx
+    log_step "重载 nginx 服务..."
+    if systemctl reload nginx >/dev/null 2>&1 || service nginx reload >/dev/null 2>&1 || nginx -s reload; then
+        log_success "nginx 重载成功"
+    else
+        log_error "nginx 重载失败"
+        exit 1
+    fi
+
+    # 清理旧的符号链接（如果存在）
+    if [[ -L "${NGINX_ENABLED}/${DOMAIN}.conf" ]]; then
+        rm -f "${NGINX_ENABLED}/${DOMAIN}.conf"
+    fi
+
+    echo ""
+    echo -e "${GREEN}========================================${NC}"
+    echo -e "${GREEN}   ✅ SSL 证书创建成功！ ${NC}"
+    echo -e "${GREEN}========================================${NC}"
+    echo ""
+    echo -e "${CYAN}📋 配置信息:${NC}"
+    echo "   域名: $DOMAIN"
+    echo "   证书文件: ${CERT_DIR}/cert.pem"
+    echo "   密钥文件: ${CERT_DIR}/key.pem"
+    echo "   后端端口: $BACKEND_PORT"
+    echo "   Nginx 配置: $HTTPS_CONF_FILE"
+    echo "   日志文件: $LOG_FILE"
+    echo ""
+    echo -e "${CYAN}🧪 验证命令:${NC}"
+    echo "   1. 测试 HTTPS 访问:"
+    echo -e "      ${GREEN}curl -I https://${DOMAIN}${NC}"
+    echo ""
+    echo "   2. 查看证书详情:"
+    echo -e "      ${GREEN}openssl x509 -in ${CERT_DIR}/cert.pem -noout -text | head -20${NC}"
+    echo ""
+    echo "   3. 在线验证 SSL 配置:"
+    echo -e "      ${GREEN}https://www.ssllabs.com/ssltest/analyze.html?d=${DOMAIN}${NC}"
+    echo ""
+    echo -e "${YELLOW}⚠️  提示:${NC}"
+    echo "   - HTTP 请求会自动 301 跳转到 HTTPS"
+    echo "   - 证书将在 60 天后自动续期"
+    echo "   - 如需手动续期: $ACME_SH --renew -d $DOMAIN"
+    echo ""
+}
+
+# 主流程
+main() {
+    check_root
+    input_parameters
+
+    echo ""
+    log_info "开始执行证书创建流程..."
+    echo ""
+
+    install_acme_sh
+    setup_webroot
+    backup_old_configs
+
+    # 检查是否需要申请新证书
+    local skip_issue=false
+    check_existing_certificate || skip_issue=true
+
+    generate_http_config
+    reload_nginx
+
+    if [[ "$skip_issue" == "false" ]]; then
+        if check_domain_reachability; then
+            issue_certificate
+        else
+            log_error "域名可达性检测失败，无法继续"
+            exit 1
+        fi
+    fi
+
+    install_certificate
+    generate_https_config
+    final_verification
+
+    echo ""
+    log_success "🎉 域名 [$DOMAIN] SSL 证书创建完成！"
+    echo ""
+}
+
+# 执行主函数
+main "$@"