diff --git a/all_file_output.py b/all_file_output.py
new file mode 100644
index 0000000..ef4d03d
--- /dev/null
+++ b/all_file_output.py
@@ -0,0 +1,64 @@
+import os
+import sys
+
+
+def collect_code_files(output_file="code_collection.txt"):
+    # 定义代码文件扩展名
+    code_extensions = [
+        '.py', '.java', '.cpp', '.c', '.h', '.hpp', '.cs',
+        '.js', '.html', '.css', '.php', '.go', '.rb',
+        '.swift', '.kt', '.ts', '.sh', '.pl', '.r'
+    ]
+
+    # 定义要排除的目录
+    excluded_dirs = [
+        'venv', 'env', '.venv', '.env', 'virtualenv',
+        '__pycache__', 'node_modules', '.git', '.idea',
+        'dist', 'build', 'target', 'bin'
+    ]
+
+    # 计数器
+    file_count = 0
+
+    # 打开输出文件
+    with open(output_file, 'w', encoding='utf-8') as out_file:
+        # 遍历当前目录及所有子目录
+        for root, dirs, files in os.walk('.'):
+            # 从dirs中移除排除的目录，这会阻止os.walk进入这些目录
+            dirs[:] = [d for d in dirs if d not in excluded_dirs]
+
+            for file in files:
+                # 获取文件扩展名
+                _, ext = os.path.splitext(file)
+
+                # 检查是否为代码文件
+                if ext.lower() in code_extensions:
+                    file_path = os.path.join(root, file)
+                    file_count += 1
+
+                    # 写入文件路径作为分隔
+                    out_file.write(f"\n{'=' * 80}\n")
+                    out_file.write(f"File: {file_path}\n")
+                    out_file.write(f"{'=' * 80}\n\n")
+
+                    # 尝试读取文件内容并写入
+                    try:
+                        with open(file_path, 'r', encoding='utf-8') as code_file:
+                            out_file.write(code_file.read())
+                    except UnicodeDecodeError:
+                        # 尝试用不同的编码
+                        try:
+                            with open(file_path, 'r', encoding='latin-1') as code_file:
+                                out_file.write(code_file.read())
+                        except Exception as e:
+                            out_file.write(f"无法读取文件内容: {str(e)}\n")
+                    except Exception as e:
+                        out_file.write(f"读取文件时出错: {str(e)}\n")
+
+    print(f"已成功收集 {file_count} 个代码文件到 {output_file}")
+
+
+if __name__ == "__main__":
+    # 如果提供了命令行参数，则使用它作为输出文件名
+    output_file = sys.argv[1] if len(sys.argv) > 1 else "code_collection.txt"
+    collect_code_files(output_file)
\ No newline at end of file
diff --git a/app.py b/app.py
new file mode 100644
index 0000000..e95008d
--- /dev/null
+++ b/app.py
@@ -0,0 +1,6 @@
+from app import create_app
+
+app = create_app()
+
+if __name__ == '__main__':
+    app.run(debug=True, host='0.0.0.0', port=49666)
diff --git a/app/__init__.py b/app/__init__.py
new file mode 100644
index 0000000..41e38d3
--- /dev/null
+++ b/app/__init__.py
@@ -0,0 +1,85 @@
+from flask import Flask, render_template, session, g
+from app.models.user import db, User
+from app.controllers.user import user_bp
+import os
+
+
+def create_app():
+    app = Flask(__name__)
+
+    # 配置应用
+    app.config.from_mapping(
+        SECRET_KEY=os.environ.get('SECRET_KEY', 'dev_key_replace_in_production'),
+        SQLALCHEMY_DATABASE_URI='mysql+pymysql://book20250428:booksystem@27.124.22.104/book_system',
+        SQLALCHEMY_TRACK_MODIFICATIONS=False,
+        PERMANENT_SESSION_LIFETIME=86400 * 7,  # 7天
+
+        # 邮件配置
+        EMAIL_HOST='smtp.qq.com',
+        EMAIL_PORT=587,
+        EMAIL_ENCRYPTION='starttls',
+        EMAIL_USERNAME='3399560459@qq.com',
+        EMAIL_PASSWORD='fzwhyirhbqdzcjgf',  # 这是你的SMTP授权码，不是邮箱密码
+        EMAIL_FROM='3399560459@qq.com',
+        EMAIL_FROM_NAME='BOOKSYSTEM_OFFICIAL'
+    )
+
+    # 实例配置，如果存在
+    app.config.from_pyfile('config.py', silent=True)
+
+    # 初始化数据库
+    db.init_app(app)
+
+    # 注册蓝图
+    app.register_blueprint(user_bp, url_prefix='/user')
+
+    # 创建数据库表
+    with app.app_context():
+        db.create_all()
+
+        # 创建默认角色
+        from app.models.user import Role
+        if not Role.query.filter_by(id=1).first():
+            admin_role = Role(id=1, role_name='管理员', description='系统管理员')
+            db.session.add(admin_role)
+
+        if not Role.query.filter_by(id=2).first():
+            user_role = Role(id=2, role_name='普通用户', description='普通用户')
+            db.session.add(user_role)
+
+        # 创建管理员账号
+        if not User.query.filter_by(username='admin').first():
+            admin = User(
+                username='admin',
+                password='admin123',
+                email='admin@example.com',
+                role_id=1,
+                nickname='系统管理员'
+            )
+            db.session.add(admin)
+
+        db.session.commit()
+
+    # 请求前处理
+    @app.before_request
+    def load_logged_in_user():
+        user_id = session.get('user_id')
+
+        if user_id is None:
+            g.user = None
+        else:
+            g.user = User.query.get(user_id)
+
+    # 首页路由
+    @app.route('/')
+    def index():
+        if not g.user:
+            return render_template('login.html')
+        return render_template('index.html', current_user=g.user)
+
+    # 错误处理
+    @app.errorhandler(404)
+    def page_not_found(e):
+        return render_template('404.html'), 404
+
+    return app
\ No newline at end of file
diff --git a/app/controllers/__init__.py b/app/controllers/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/controllers/announcement.py b/app/controllers/announcement.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/controllers/book.py b/app/controllers/book.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/controllers/borrow.py b/app/controllers/borrow.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/controllers/inventory.py b/app/controllers/inventory.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/controllers/log.py b/app/controllers/log.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/controllers/statistics.py b/app/controllers/statistics.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/controllers/user.py b/app/controllers/user.py
new file mode 100644
index 0000000..a0561f4
--- /dev/null
+++ b/app/controllers/user.py
@@ -0,0 +1,181 @@
+from flask import Blueprint, render_template, request, redirect, url_for, flash, session, jsonify
+from werkzeug.security import generate_password_hash, check_password_hash
+from app.models.user import User, db
+from app.utils.email import send_verification_email, generate_verification_code
+import logging
+from functools import wraps
+import time
+from datetime import datetime, timedelta
+
+# 创建蓝图
+user_bp = Blueprint('user', __name__)
+
+
+# 使用内存字典代替Redis存储验证码
+class VerificationStore:
+    def __init__(self):
+        self.codes = {}  # 存储格式: {email: {'code': code, 'expires': timestamp}}
+
+    def setex(self, email, seconds, code):
+        """设置验证码并指定过期时间"""
+        expiry = datetime.now() + timedelta(seconds=seconds)
+        self.codes[email] = {'code': code, 'expires': expiry}
+        return True
+
+    def get(self, email):
+        """获取验证码，如果过期则返回None"""
+        if email not in self.codes:
+            return None
+
+        data = self.codes[email]
+        if datetime.now() > data['expires']:
+            # 验证码已过期，删除它
+            self.delete(email)
+            return None
+
+        return data['code']
+
+    def delete(self, email):
+        """删除验证码"""
+        if email in self.codes:
+            del self.codes[email]
+        return True
+
+
+# 使用内存存储验证码
+verification_codes = VerificationStore()
+
+
+def login_required(f):
+    @wraps(f)
+    def decorated_function(*args, **kwargs):
+        if 'user_id' not in session:
+            return redirect(url_for('user.login'))
+        return f(*args, **kwargs)
+
+    return decorated_function
+
+
+@user_bp.route('/login', methods=['GET', 'POST'])
+def login():
+    # 保持原代码不变
+    if request.method == 'POST':
+        username = request.form.get('username')
+        password = request.form.get('password')
+        remember_me = request.form.get('remember_me') == 'on'
+
+        if not username or not password:
+            return render_template('login.html', error='用户名和密码不能为空')
+
+        # 检查用户是否存在
+        user = User.query.filter((User.username == username) | (User.email == username)).first()
+
+        if not user or not user.check_password(password):
+            return render_template('login.html', error='用户名或密码错误')
+
+        if user.status == 0:
+            return render_template('login.html', error='账号已被禁用，请联系管理员')
+
+        # 登录成功，保存用户信息到会话
+        session['user_id'] = user.id
+        session['username'] = user.username
+        session['role_id'] = user.role_id
+
+        if remember_me:
+            # 设置会话过期时间为7天
+            session.permanent = True
+
+        # 记录登录日志（可选）
+        # log_user_action('用户登录')
+
+        # 重定向到首页
+        return redirect(url_for('index'))
+
+    return render_template('login.html')
+
+
+@user_bp.route('/register', methods=['GET', 'POST'])
+def register():
+    if request.method == 'POST':
+        username = request.form.get('username')
+        email = request.form.get('email')
+        password = request.form.get('password')
+        confirm_password = request.form.get('confirm_password')
+        verification_code = request.form.get('verification_code')
+
+        # 验证表单数据
+        if not username or not email or not password or not confirm_password or not verification_code:
+            return render_template('register.html', error='所有字段都是必填项')
+
+        if password != confirm_password:
+            return render_template('register.html', error='两次输入的密码不匹配')
+
+        # 检查用户名和邮箱是否已存在
+        if User.query.filter_by(username=username).first():
+            return render_template('register.html', error='用户名已存在')
+
+        if User.query.filter_by(email=email).first():
+            return render_template('register.html', error='邮箱已被注册')
+
+        # 验证验证码
+        stored_code = verification_codes.get(email)
+        if not stored_code or stored_code != verification_code:
+            return render_template('register.html', error='验证码无效或已过期')
+
+        # 创建新用户
+        try:
+            new_user = User(
+                username=username,
+                password=password,  # 密码会在模型中自动哈希
+                email=email,
+                nickname=username  # 默认昵称与用户名相同
+            )
+            db.session.add(new_user)
+            db.session.commit()
+
+            # 清除验证码
+            verification_codes.delete(email)
+
+            flash('注册成功，请登录', 'success')
+            return redirect(url_for('user.login'))
+        except Exception as e:
+            db.session.rollback()
+            logging.error(f"User registration failed: {str(e)}")
+            return render_template('register.html', error='注册失败，请稍后重试')
+
+    return render_template('register.html')
+
+
+@user_bp.route('/logout')
+def logout():
+    # 清除会话数据
+    session.pop('user_id', None)
+    session.pop('username', None)
+    session.pop('role_id', None)
+    return redirect(url_for('user.login'))
+
+
+@user_bp.route('/send_verification_code', methods=['POST'])
+def send_verification_code():
+    data = request.get_json()
+    email = data.get('email')
+
+    if not email:
+        return jsonify({'success': False, 'message': '请提供邮箱地址'})
+
+    # 检查邮箱格式
+    import re
+    if not re.match(r"[^@]+@[^@]+\.[^@]+", email):
+        return jsonify({'success': False, 'message': '邮箱格式不正确'})
+
+    # 生成验证码
+    code = generate_verification_code()
+
+    # 存储验证码(10分钟有效)
+    verification_codes.setex(email, 600, code)  # 10分钟过期
+
+    # 发送验证码邮件
+    if send_verification_email(email, code):
+        return jsonify({'success': True, 'message': '验证码已发送'})
+    else:
+        return jsonify({'success': False, 'message': '邮件发送失败，请稍后重试'})
diff --git a/app/models/__init__.py b/app/models/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/models/announcement.py b/app/models/announcement.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/models/book.py b/app/models/book.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/models/borrow.py b/app/models/borrow.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/models/inventory.py b/app/models/inventory.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/models/log.py b/app/models/log.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/models/notification.py b/app/models/notification.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/models/user.py b/app/models/user.py
new file mode 100644
index 0000000..d0182cc
--- /dev/null
+++ b/app/models/user.py
@@ -0,0 +1,75 @@
+from flask_sqlalchemy import SQLAlchemy
+from werkzeug.security import generate_password_hash, check_password_hash
+from datetime import datetime
+
+db = SQLAlchemy()
+
+
+class User(db.Model):
+    __tablename__ = 'users'
+
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    username = db.Column(db.String(64), unique=True, nullable=False)
+    password = db.Column(db.String(255), nullable=False)
+    email = db.Column(db.String(128), unique=True, nullable=True)
+    phone = db.Column(db.String(20), unique=True, nullable=True)
+    nickname = db.Column(db.String(64), nullable=True)
+    status = db.Column(db.Integer, default=1)  # 1: active, 0: disabled
+    role_id = db.Column(db.Integer, db.ForeignKey('roles.id'), default=2)  # 2: 普通用户, 1: 管理员
+    created_at = db.Column(db.DateTime, default=datetime.now)
+    updated_at = db.Column(db.DateTime, default=datetime.now, onupdate=datetime.now)
+
+    def __init__(self, username, password, email=None, phone=None, nickname=None, role_id=2):
+        self.username = username
+        self.set_password(password)
+        self.email = email
+        self.phone = phone
+        self.nickname = nickname
+        self.role_id = role_id
+
+    def set_password(self, password):
+        """设置密码，使用哈希加密"""
+        self.password = generate_password_hash(password)
+
+    def check_password(self, password):
+        """验证密码"""
+        return check_password_hash(self.password, password)
+
+    def to_dict(self):
+        """转换为字典格式"""
+        return {
+            'id': self.id,
+            'username': self.username,
+            'email': self.email,
+            'phone': self.phone,
+            'nickname': self.nickname,
+            'status': self.status,
+            'role_id': self.role_id,
+            'created_at': self.created_at.strftime('%Y-%m-%d %H:%M:%S'),
+            'updated_at': self.updated_at.strftime('%Y-%m-%d %H:%M:%S')
+        }
+
+    @classmethod
+    def create_user(cls, username, password, email=None, phone=None, nickname=None, role_id=2):
+        """创建新用户"""
+        user = User(
+            username=username,
+            password=password,
+            email=email,
+            phone=phone,
+            nickname=nickname,
+            role_id=role_id
+        )
+        db.session.add(user)
+        db.session.commit()
+        return user
+
+
+class Role(db.Model):
+    __tablename__ = 'roles'
+
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    role_name = db.Column(db.String(32), unique=True, nullable=False)
+    description = db.Column(db.String(128))
+
+    users = db.relationship('User', backref='role')
diff --git a/app/services/__init__.py b/app/services/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/services/book_service.py b/app/services/book_service.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/services/borrow_service.py b/app/services/borrow_service.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/services/inventory_service.py b/app/services/inventory_service.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/services/user_service.py b/app/services/user_service.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/static/css/index.css b/app/static/css/index.css
new file mode 100644
index 0000000..f0896b9
--- /dev/null
+++ b/app/static/css/index.css
@@ -0,0 +1,651 @@
+/* index.css - 仅用于图书管理系统首页/仪表板 */
+
+* {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
+}
+
+body {
+    background-color: #f5f7fa;
+    color: #333;
+    font-size: 16px;
+    line-height: 1.6;
+}
+
+a {
+    text-decoration: none;
+    color: #4a89dc;
+}
+
+ul {
+    list-style: none;
+}
+
+/* 应用容器 */
+.app-container {
+    display: flex;
+    min-height: 100vh;
+}
+
+/* 侧边导航栏 */
+.sidebar {
+    width: 250px;
+    background-color: #2c3e50;
+    color: #ecf0f1;
+    padding: 20px 0;
+    box-shadow: 0 0 10px rgba(0,0,0,0.1);
+    position: fixed;
+    height: 100vh;
+    overflow-y: auto;
+}
+
+.logo-container {
+    padding: 0 20px 20px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    flex-direction: column;
+    margin-bottom: 20px;
+    border-bottom: 1px solid rgba(255,255,255,0.1);
+}
+
+.logo {
+    width: 60px;
+    height: auto;
+    margin-bottom: 10px;
+}
+
+.logo-container h2 {
+    font-size: 1.2rem;
+    margin: 10px 0;
+    color: #ecf0f1;
+    font-weight: 500;
+}
+
+.nav-links li {
+    margin-bottom: 5px;
+}
+
+.nav-links li a {
+    padding: 10px 20px;
+    display: flex;
+    align-items: center;
+    color: #bdc3c7;
+    transition: all 0.3s ease;
+}
+
+.nav-links li a i {
+    margin-right: 10px;
+    font-size: 1.1rem;
+    width: 20px;
+    text-align: center;
+}
+
+.nav-links li a:hover, .nav-links li.active a {
+    background-color: #34495e;
+    color: #ecf0f1;
+    border-left: 3px solid #4a89dc;
+}
+
+.nav-category {
+    padding: 10px 20px;
+    font-size: 0.85rem;
+    text-transform: uppercase;
+    color: #7f8c8d;
+    margin-top: 15px;
+    margin-bottom: 5px;
+}
+
+/* 主内容区 */
+.main-content {
+    flex: 1;
+    margin-left: 250px;
+    padding: 20px;
+}
+
+/* 顶部导航栏 */
+.top-bar {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    padding: 15px 30px;
+    background-color: #fff;
+    border-radius: 8px;
+    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
+    margin-bottom: 20px;
+}
+
+.search-container {
+    position: relative;
+    width: 300px;
+}
+
+.search-input {
+    padding: 10px 15px 10px 40px;
+    width: 100%;
+    border: 1px solid #e1e4e8;
+    border-radius: 20px;
+    font-size: 14px;
+    transition: all 0.3s ease;
+}
+
+.search-input:focus {
+    border-color: #4a89dc;
+    box-shadow: 0 0 0 3px rgba(74, 137, 220, 0.1);
+    outline: none;
+}
+
+.search-icon {
+    position: absolute;
+    left: 15px;
+    top: 50%;
+    transform: translateY(-50%);
+    color: #8492a6;
+}
+
+.user-menu {
+    display: flex;
+    align-items: center;
+}
+
+.notifications {
+    margin-right: 20px;
+    position: relative;
+    cursor: pointer;
+}
+
+.notifications i {
+    font-size: 1.2rem;
+    color: #606266;
+}
+
+.badge {
+    position: absolute;
+    top: -8px;
+    right: -8px;
+    background-color: #f56c6c;
+    color: white;
+    font-size: 0.7rem;
+    width: 18px;
+    height: 18px;
+    border-radius: 50%;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+}
+
+.user-info {
+    display: flex;
+    align-items: center;
+    position: relative;
+    cursor: pointer;
+}
+
+.user-avatar {
+    width: 40px;
+    height: 40px;
+    border-radius: 50%;
+    background-color: #4a89dc;
+    color: white;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    font-weight: bold;
+    margin-right: 10px;
+    font-size: 1.2rem;
+}
+
+.user-details {
+    display: flex;
+    flex-direction: column;
+}
+
+.user-name {
+    font-weight: 500;
+    color: #333;
+}
+
+.user-role {
+    font-size: 0.8rem;
+    color: #8492a6;
+}
+
+.dropdown-menu {
+    position: absolute;
+    top: 100%;
+    right: 0;
+    background-color: white;
+    border-radius: 4px;
+    box-shadow: 0 2px 12px 0 rgba(0,0,0,0.1);
+    padding: 10px 0;
+    min-width: 150px;
+    display: none;
+    z-index: 10;
+}
+
+.user-info.active .dropdown-menu {
+    display: block;
+}
+
+.dropdown-menu a {
+    display: block;
+    padding: 8px 15px;
+    color: #606266;
+    transition: all 0.3s ease;
+}
+
+.dropdown-menu a:hover {
+    background-color: #f5f7fa;
+}
+
+.dropdown-menu a i {
+    margin-right: 8px;
+    width: 16px;
+    text-align: center;
+}
+
+/* 欢迎区域 */
+.welcome-section {
+    background: linear-gradient(to right, #4a89dc, #5d9cec);
+    color: white;
+    padding: 30px;
+    border-radius: 8px;
+    margin-bottom: 20px;
+    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
+}
+
+.welcome-section h1 {
+    font-size: 1.8rem;
+    margin-bottom: 5px;
+}
+
+.welcome-section p {
+    font-size: 1rem;
+    opacity: 0.9;
+}
+
+/* 统计卡片样式 */
+.stats-container {
+    display: grid;
+    grid-template-columns: repeat(4, 1fr);
+    gap: 20px;
+    margin-bottom: 30px;
+}
+
+.stat-card {
+    background-color: white;
+    border-radius: 8px;
+    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
+    padding: 20px;
+    display: flex;
+    align-items: center;
+    transition: transform 0.3s ease, box-shadow 0.3s ease;
+}
+
+.stat-card:hover {
+    transform: translateY(-5px);
+    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
+}
+
+.stat-icon {
+    font-size: 2rem;
+    color: #4a89dc;
+    margin-right: 15px;
+    width: 40px;
+    text-align: center;
+}
+
+.stat-info h3 {
+    font-size: 0.9rem;
+    color: #606266;
+    margin-bottom: 5px;
+}
+
+.stat-number {
+    font-size: 1.8rem;
+    font-weight: 600;
+    color: #2c3e50;
+}
+
+/* 主要内容区域 */
+.main-sections {
+    display: grid;
+    grid-template-columns: 2fr 1fr;
+    gap: 20px;
+    margin-bottom: 30px;
+}
+
+.content-section {
+    background-color: white;
+    border-radius: 8px;
+    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
+    padding: 20px;
+}
+
+.section-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    margin-bottom: 20px;
+    padding-bottom: 10px;
+    border-bottom: 1px solid #edf2f7;
+}
+
+.section-header h2 {
+    font-size: 1.2rem;
+    color: #2c3e50;
+}
+
+.view-all {
+    font-size: 0.85rem;
+    color: #4a89dc;
+    display: flex;
+    align-items: center;
+}
+
+.view-all i {
+    margin-left: 5px;
+    transition: transform 0.3s ease;
+}
+
+.view-all:hover i {
+    transform: translateX(3px);
+}
+
+/* 图书卡片样式 */
+.book-grid {
+    display: grid;
+    grid-template-columns: repeat(2, 1fr);
+    gap: 20px;
+}
+
+.book-card {
+    display: flex;
+    border: 1px solid #edf2f7;
+    border-radius: 8px;
+    overflow: hidden;
+    transition: transform 0.3s ease, box-shadow 0.3s ease;
+}
+
+.book-card:hover {
+    transform: translateY(-5px);
+    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
+}
+
+.book-cover {
+    width: 100px;
+    height: 140px;
+    min-width: 100px;
+    background-color: #f5f7fa;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    overflow: hidden;
+}
+
+.book-cover img {
+    width: 100%;
+    height: 100%;
+    object-fit: cover;
+}
+
+.book-info {
+    padding: 15px;
+    flex: 1;
+    display: flex;
+    flex-direction: column;
+}
+
+.book-title {
+    font-size: 1rem;
+    margin-bottom: 5px;
+    color: #2c3e50;
+    display: -webkit-box;
+    -webkit-line-clamp: 1;
+    -webkit-box-orient: vertical;
+    overflow: hidden;
+}
+
+.book-author {
+    font-size: 0.85rem;
+    color: #606266;
+    margin-bottom: 10px;
+}
+
+.book-meta {
+    display: flex;
+    justify-content: space-between;
+    margin-bottom: 15px;
+}
+
+.book-category {
+    background-color: #e5f1ff;
+    color: #4a89dc;
+    padding: 3px 8px;
+    border-radius: 4px;
+    font-size: 0.75rem;
+}
+
+.book-status {
+    font-size: 0.75rem;
+    font-weight: 500;
+}
+
+.book-status.available {
+    color: #67c23a;
+}
+
+.book-status.borrowed {
+    color: #e6a23c;
+}
+
+.borrow-btn {
+    background-color: #4a89dc;
+    color: white;
+    border: none;
+    padding: 6px 12px;
+    border-radius: 4px;
+    cursor: pointer;
+    font-size: 0.85rem;
+    margin-top: auto;
+    transition: background-color 0.3s ease;
+}
+
+.borrow-btn:hover {
+    background-color: #357bc8;
+}
+
+/* 通知公告样式 */
+.notice-item {
+    display: flex;
+    padding: 15px 0;
+    border-bottom: 1px solid #edf2f7;
+}
+
+.notice-item:last-child {
+    border-bottom: none;
+}
+
+.notice-icon {
+    font-size: 1.5rem;
+    color: #4a89dc;
+    margin-right: 15px;
+    display: flex;
+    align-items: flex-start;
+    padding-top: 5px;
+}
+
+.notice-content h3 {
+    font-size: 1rem;
+    color: #2c3e50;
+    margin-bottom: 5px;
+}
+
+.notice-content p {
+    font-size: 0.9rem;
+    color: #606266;
+    margin-bottom: 10px;
+}
+
+.notice-meta {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+}
+
+.notice-time {
+    font-size: 0.8rem;
+    color: #8492a6;
+}
+
+.renew-btn {
+    background-color: #ecf5ff;
+    color: #4a89dc;
+    border: 1px solid #d9ecff;
+    padding: 5px 10px;
+    border-radius: 4px;
+    font-size: 0.8rem;
+    cursor: pointer;
+    transition: all 0.3s ease;
+}
+
+.renew-btn:hover {
+    background-color: #4a89dc;
+    color: white;
+    border-color: #4a89dc;
+}
+
+/* 热门图书区域 */
+.popular-section {
+    margin-top: 20px;
+}
+
+.popular-books {
+    display: flex;
+    overflow-x: auto;
+    gap: 15px;
+    padding-bottom: 10px;
+}
+
+.popular-book-item {
+    display: flex;
+    background-color: #f8fafc;
+    border-radius: 8px;
+    padding: 15px;
+    min-width: 280px;
+    position: relative;
+}
+
+.rank-badge {
+    position: absolute;
+    top: -10px;
+    left: 10px;
+    background-color: #4a89dc;
+    color: white;
+    width: 24px;
+    height: 24px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    border-radius: 50%;
+    font-size: 0.8rem;
+    font-weight: bold;
+}
+
+.book-cover.small {
+    width: 60px;
+    height: 90px;
+    min-width: 60px;
+    margin-right: 15px;
+}
+
+.book-details {
+    flex: 1;
+}
+
+.book-stats {
+    display: flex;
+    flex-direction: column;
+    gap: 5px;
+    margin-top: 10px;
+}
+
+.book-stats span {
+    font-size: 0.8rem;
+    color: #8492a6;
+}
+
+.book-stats i {
+    margin-right: 5px;
+}
+
+/* 响应式调整 */
+@media (max-width: 1200px) {
+    .stats-container {
+        grid-template-columns: repeat(2, 1fr);
+    }
+
+    .main-sections {
+        grid-template-columns: 1fr;
+    }
+}
+
+@media (max-width: 768px) {
+    .sidebar {
+        width: 70px;
+        overflow: hidden;
+    }
+
+    .logo-container {
+        padding: 10px;
+    }
+
+    .logo-container h2 {
+        display: none;
+    }
+
+    .nav-links li a span {
+        display: none;
+    }
+
+    .nav-links li a i {
+        margin-right: 0;
+    }
+
+    .nav-category {
+        display: none;
+    }
+
+    .main-content {
+        margin-left: 70px;
+    }
+
+    .search-container {
+        width: 180px;
+    }
+
+    .book-grid {
+        grid-template-columns: 1fr;
+    }
+}
+
+@media (max-width: 576px) {
+    .stats-container {
+        grid-template-columns: 1fr;
+    }
+
+    .top-bar {
+        flex-direction: column;
+        gap: 15px;
+    }
+
+    .search-container {
+        width: 100%;
+    }
+
+    .user-details {
+        display: none;
+    }
+}
\ No newline at end of file
diff --git a/app/static/css/main.css b/app/static/css/main.css
new file mode 100644
index 0000000..79fdbfa
--- /dev/null
+++ b/app/static/css/main.css
@@ -0,0 +1,469 @@
+/* 主样式文件 - 从登录页面复制过来的样式 */
+/* 从您提供的登录页CSS复制，但省略了不需要的部分 */
+* {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
+}
+
+:root {
+    --primary-color: #4a89dc;
+    --primary-hover: #3b78c4;
+    --secondary-color: #5cb85c;
+    --text-color: #333;
+    --light-text: #666;
+    --bg-color: #f5f7fa;
+    --card-bg: #ffffff;
+    --border-color: #ddd;
+    --error-color: #e74c3c;
+    --success-color: #2ecc71;
+}
+
+body.dark-mode {
+    --primary-color: #5a9aed;
+    --primary-hover: #4a89dc;
+    --secondary-color: #6bc76b;
+    --text-color: #f1f1f1;
+    --light-text: #aaa;
+    --bg-color: #1a1a1a;
+    --card-bg: #2c2c2c;
+    --border-color: #444;
+}
+
+body {
+    background-color: var(--bg-color);
+    background-image: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
+    background-size: cover;
+    background-position: center;
+    display: flex;
+    flex-direction: column;
+    min-height: 100vh;
+    color: var(--text-color);
+    transition: all 0.3s ease;
+}
+
+.theme-toggle {
+    position: absolute;
+    top: 20px;
+    right: 20px;
+    z-index: 10;
+    cursor: pointer;
+    padding: 8px;
+    border-radius: 50%;
+    background-color: rgba(255, 255, 255, 0.2);
+    backdrop-filter: blur(5px);
+    border: 1px solid rgba(255, 255, 255, 0.1);
+}
+
+.overlay {
+    background-color: rgba(0, 0, 0, 0.4);
+    backdrop-filter: blur(5px);
+    position: fixed;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    z-index: -1;
+}
+
+.main-container {
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    flex: 1;
+    padding: 20px;
+}
+
+.login-container {
+    background-color: var(--card-bg);
+    border-radius: 12px;
+    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
+    width: 450px;
+    padding: 35px;
+    position: relative;
+    overflow: hidden;
+    animation: fadeIn 0.5s ease;
+}
+
+@keyframes fadeIn {
+    from { opacity: 0; transform: translateY(20px); }
+    to { opacity: 1; transform: translateY(0); }
+}
+
+.logo {
+    text-align: center;
+    margin-bottom: 25px;
+    position: relative;
+}
+
+.logo img {
+    width: 90px;
+    height: 90px;
+    border-radius: 12px;
+    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
+    padding: 5px;
+    background-color: #fff;
+    transition: transform 0.3s ease;
+}
+
+h1 {
+    text-align: center;
+    color: var(--text-color);
+    margin-bottom: 10px;
+    font-weight: 600;
+    font-size: 28px;
+}
+
+.subtitle {
+    text-align: center;
+    color: var(--light-text);
+    margin-bottom: 30px;
+    font-size: 14px;
+}
+
+.form-group {
+    margin-bottom: 22px;
+    position: relative;
+}
+
+.form-group label {
+    display: block;
+    margin-bottom: 8px;
+    color: var(--text-color);
+    font-weight: 500;
+    font-size: 14px;
+}
+
+.input-with-icon {
+    position: relative;
+}
+
+.input-icon {
+    position: absolute;
+    left: 15px;
+    top: 50%;
+    transform: translateY(-50%);
+    color: var(--light-text);
+}
+
+.form-control {
+    width: 100%;
+    height: 48px;
+    border: 1px solid var(--border-color);
+    border-radius: 6px;
+    padding: 0 15px 0 45px;
+    font-size: 15px;
+    transition: all 0.3s ease;
+    background-color: var(--card-bg);
+    color: var(--text-color);
+}
+
+.form-control:focus {
+    border-color: var(--primary-color);
+    box-shadow: 0 0 0 3px rgba(74, 137, 220, 0.2);
+    outline: none;
+}
+
+.password-toggle {
+    position: absolute;
+    right: 15px;
+    top: 50%;
+    transform: translateY(-50%);
+    cursor: pointer;
+    color: var(--light-text);
+}
+
+.validation-message {
+    margin-top: 6px;
+    font-size: 12px;
+    color: var(--error-color);
+    display: none;
+}
+
+.validation-message.show {
+    display: block;
+    animation: shake 0.5s ease;
+}
+
+@keyframes shake {
+    0%, 100% { transform: translateX(0); }
+    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
+    20%, 40%, 60%, 80% { transform: translateX(5px); }
+}
+
+.remember-forgot {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    margin-bottom: 25px;
+}
+
+.custom-checkbox {
+    position: relative;
+    padding-left: 30px;
+    cursor: pointer;
+    font-size: 14px;
+    user-select: none;
+    color: var(--light-text);
+}
+
+.custom-checkbox input {
+    position: absolute;
+    opacity: 0;
+    cursor: pointer;
+    height: 0;
+    width: 0;
+}
+
+.checkmark {
+    position: absolute;
+    top: 0;
+    left: 0;
+    height: 18px;
+    width: 18px;
+    background-color: var(--card-bg);
+    border: 1px solid var(--border-color);
+    border-radius: 3px;
+    transition: all 0.2s ease;
+}
+
+.custom-checkbox:hover input ~ .checkmark {
+    border-color: var(--primary-color);
+}
+
+.custom-checkbox input:checked ~ .checkmark {
+    background-color: var(--primary-color);
+    border-color: var(--primary-color);
+}
+
+.checkmark:after {
+    content: "";
+    position: absolute;
+    display: none;
+}
+
+.custom-checkbox input:checked ~ .checkmark:after {
+    display: block;
+}
+
+.custom-checkbox .checkmark:after {
+    left: 6px;
+    top: 2px;
+    width: 4px;
+    height: 9px;
+    border: solid white;
+    border-width: 0 2px 2px 0;
+    transform: rotate(45deg);
+}
+
+.forgot-password a {
+    color: var(--primary-color);
+    text-decoration: none;
+    font-size: 14px;
+    transition: color 0.3s ease;
+}
+
+.forgot-password a:hover {
+    color: var(--primary-hover);
+    text-decoration: underline;
+}
+
+.btn-login {
+    width: 100%;
+    height: 48px;
+    background-color: var(--primary-color);
+    color: white;
+    border: none;
+    border-radius: 6px;
+    font-size: 16px;
+    font-weight: 600;
+    cursor: pointer;
+    transition: all 0.3s ease;
+    position: relative;
+    overflow: hidden;
+}
+
+.btn-login:hover {
+    background-color: var(--primary-hover);
+}
+
+.btn-login:active {
+    transform: scale(0.98);
+}
+
+.btn-login .loading {
+    display: none;
+    position: absolute;
+    top: 50%;
+    left: 50%;
+    transform: translate(-50%, -50%);
+}
+
+.btn-login.loading-state {
+    color: transparent;
+}
+
+.btn-login.loading-state .loading {
+    display: block;
+}
+
+.signup {
+    text-align: center;
+    margin-top: 25px;
+    font-size: 14px;
+    color: var(--light-text);
+}
+
+.signup a {
+    color: var(--primary-color);
+    text-decoration: none;
+    font-weight: 600;
+    transition: color 0.3s ease;
+}
+
+.signup a:hover {
+    color: var(--primary-hover);
+    text-decoration: underline;
+}
+
+.features {
+    display: flex;
+    justify-content: center;
+    margin-top: 25px;
+    gap: 30px;
+}
+
+.feature-item {
+    text-align: center;
+    font-size: 12px;
+    color: var(--light-text);
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+}
+
+.feature-icon {
+    margin-bottom: 5px;
+    font-size: 18px;
+}
+
+footer {
+    text-align: center;
+    padding: 20px;
+    color: rgba(255, 255, 255, 0.7);
+    font-size: 12px;
+}
+
+footer a {
+    color: rgba(255, 255, 255, 0.9);
+    text-decoration: none;
+}
+
+.alert {
+    padding: 10px;
+    margin-bottom: 15px;
+    border-radius: 4px;
+    color: #721c24;
+    background-color: #f8d7da;
+    border: 1px solid #f5c6cb;
+}
+
+.verification-code-container {
+    display: flex;
+    gap: 10px;
+}
+
+.verification-input {
+    flex: 1;
+    height: 48px;
+    border: 1px solid var(--border-color);
+    border-radius: 6px;
+    padding: 0 15px;
+    font-size: 15px;
+}
+
+.send-code-btn {
+    padding: 0 15px;
+    background-color: var(--primary-color);
+    color: white;
+    border: none;
+    border-radius: 6px;
+    cursor: pointer;
+    white-space: nowrap;
+}
+
+.register-container {
+    width: 500px;
+}
+
+@media (max-width: 576px) {
+    .login-container {
+        width: 100%;
+        padding: 25px;
+        border-radius: 0;
+    }
+
+    .theme-toggle {
+        top: 10px;
+    }
+
+    .logo img {
+        width: 70px;
+        height: 70px;
+    }
+
+    h1 {
+        font-size: 22px;
+    }
+
+    .main-container {
+        padding: 0;
+    }
+
+    .verification-code-container {
+        flex-direction: column;
+    }
+
+    .register-container {
+        width: 100%;
+    }
+}
+
+.verification-code-container {
+    display: flex;
+    gap: 10px;
+}
+
+.verification-input {
+    flex: 1;
+    height: 48px;
+    border: 1px solid var(--border-color);
+    border-radius: 6px;
+    padding: 0 15px;
+    font-size: 15px;
+    transition: all 0.3s ease;
+    background-color: var(--card-bg);
+    color: var(--text-color);
+}
+
+.send-code-btn {
+    padding: 0 15px;
+    background-color: var(--primary-color);
+    color: white;
+    border: none;
+    border-radius: 6px;
+    cursor: pointer;
+    font-size: 14px;
+    white-space: nowrap;
+    transition: all 0.3s ease;
+}
+
+.send-code-btn:hover {
+    background-color: var(--primary-hover);
+}
+
+.send-code-btn:disabled {
+    background-color: #ccc;
+    cursor: not-allowed;
+}
diff --git a/app/static/images/logo.png b/app/static/images/logo.png
new file mode 100644
index 0000000..d1e40dc
Binary files /dev/null and b/app/static/images/logo.png differ
diff --git a/app/static/js/main.js b/app/static/js/main.js
new file mode 100644
index 0000000..95937b2
--- /dev/null
+++ b/app/static/js/main.js
@@ -0,0 +1,340 @@
+// 主JS文件 - 包含登录和注册功能
+document.addEventListener('DOMContentLoaded', function() {
+    // 主题切换
+    const themeToggle = document.getElementById('theme-toggle');
+    if (themeToggle) {
+        const body = document.body;
+
+        themeToggle.addEventListener('click', function() {
+            body.classList.toggle('dark-mode');
+            const isDarkMode = body.classList.contains('dark-mode');
+            localStorage.setItem('dark-mode', isDarkMode);
+            themeToggle.innerHTML = isDarkMode ? '🌙' : '☀️';
+        });
+
+        // 从本地存储中加载主题首选项
+        const savedDarkMode = localStorage.getItem('dark-mode') === 'true';
+        if (savedDarkMode) {
+            body.classList.add('dark-mode');
+            themeToggle.innerHTML = '🌙';
+        }
+    }
+
+    // 密码可见性切换
+    const passwordToggle = document.getElementById('password-toggle');
+    if (passwordToggle) {
+        const passwordInput = document.getElementById('password');
+        passwordToggle.addEventListener('click', function() {
+            const type = passwordInput.getAttribute('type') === 'password' ? 'text' : 'password';
+            passwordInput.setAttribute('type', type);
+            passwordToggle.innerHTML = type === 'password' ? '👁️' : '👁️‍🗨️';
+        });
+    }
+
+    // 登录表单验证
+    const loginForm = document.getElementById('login-form');
+    if (loginForm) {
+        const usernameInput = document.getElementById('username');
+        const passwordInput = document.getElementById('password');
+        const usernameError = document.getElementById('username-error');
+        const passwordError = document.getElementById('password-error');
+        const loginButton = document.getElementById('login-button');
+
+        if (usernameInput && usernameError) {
+            usernameInput.addEventListener('input', function() {
+                if (usernameInput.value.trim() === '') {
+                    usernameError.textContent = '用户名不能为空';
+                    usernameError.classList.add('show');
+                } else {
+                    usernameError.classList.remove('show');
+                }
+            });
+        }
+
+        if (passwordInput && passwordError) {
+            passwordInput.addEventListener('input', function() {
+                if (passwordInput.value.trim() === '') {
+                    passwordError.textContent = '密码不能为空';
+                    passwordError.classList.add('show');
+                } else if (passwordInput.value.length < 6) {
+                    passwordError.textContent = '密码长度至少6位';
+                    passwordError.classList.add('show');
+                } else {
+                    passwordError.classList.remove('show');
+                }
+            });
+        }
+
+        loginForm.addEventListener('submit', function(e) {
+            let isValid = true;
+
+            // 验证用户名
+            if (usernameInput.value.trim() === '') {
+                usernameError.textContent = '用户名不能为空';
+                usernameError.classList.add('show');
+                isValid = false;
+            }
+
+            // 验证密码
+            if (passwordInput.value.trim() === '') {
+                passwordError.textContent = '密码不能为空';
+                passwordError.classList.add('show');
+                isValid = false;
+            } else if (passwordInput.value.length < 6) {
+                passwordError.textContent = '密码长度至少6位';
+                passwordError.classList.add('show');
+                isValid = false;
+            }
+
+            if (!isValid) {
+                e.preventDefault();
+            } else if (loginButton) {
+                loginButton.classList.add('loading-state');
+            }
+        });
+    }
+    // 注册表单验证
+    const registerForm = document.getElementById('register-form');
+    if (registerForm) {
+        const usernameInput = document.getElementById('username');
+        const emailInput = document.getElementById('email');
+        const passwordInput = document.getElementById('password');
+        const confirmPasswordInput = document.getElementById('confirm_password');
+        const verificationCodeInput = document.getElementById('verification_code');
+
+        const usernameError = document.getElementById('username-error');
+        const emailError = document.getElementById('email-error');
+        const passwordError = document.getElementById('password-error');
+        const confirmPasswordError = document.getElementById('confirm-password-error');
+        const verificationCodeError = document.getElementById('verification-code-error');
+
+        const registerButton = document.getElementById('register-button');
+        const sendCodeBtn = document.getElementById('send-code-btn');
+
+        // 用户名验证
+        if (usernameInput && usernameError) {
+            usernameInput.addEventListener('input', function() {
+                if (usernameInput.value.trim() === '') {
+                    usernameError.textContent = '用户名不能为空';
+                    usernameError.classList.add('show');
+                } else if (usernameInput.value.length < 3) {
+                    usernameError.textContent = '用户名至少3个字符';
+                    usernameError.classList.add('show');
+                } else {
+                    usernameError.classList.remove('show');
+                }
+            });
+        }
+
+        // 邮箱验证
+        if (emailInput && emailError) {
+            emailInput.addEventListener('input', function() {
+                const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+                if (emailInput.value.trim() === '') {
+                    emailError.textContent = '邮箱不能为空';
+                    emailError.classList.add('show');
+                } else if (!emailRegex.test(emailInput.value)) {
+                    emailError.textContent = '请输入有效的邮箱地址';
+                    emailError.classList.add('show');
+                } else {
+                    emailError.classList.remove('show');
+                }
+            });
+        }
+
+        // 密码验证
+        if (passwordInput && passwordError) {
+            passwordInput.addEventListener('input', function() {
+                if (passwordInput.value.trim() === '') {
+                    passwordError.textContent = '密码不能为空';
+                    passwordError.classList.add('show');
+                } else if (passwordInput.value.length < 6) {
+                    passwordError.textContent = '密码长度至少6位';
+                    passwordError.classList.add('show');
+                } else {
+                    passwordError.classList.remove('show');
+                }
+
+                // 检查确认密码是否匹配
+                if (confirmPasswordInput && confirmPasswordInput.value) {
+                    if (confirmPasswordInput.value !== passwordInput.value) {
+                        confirmPasswordError.textContent = '两次输入的密码不匹配';
+                        confirmPasswordError.classList.add('show');
+                    } else {
+                        confirmPasswordError.classList.remove('show');
+                    }
+                }
+            });
+        }
+
+        // 确认密码验证
+        if (confirmPasswordInput && confirmPasswordError) {
+            confirmPasswordInput.addEventListener('input', function() {
+                if (confirmPasswordInput.value.trim() === '') {
+                    confirmPasswordError.textContent = '请确认密码';
+                    confirmPasswordError.classList.add('show');
+                } else if (confirmPasswordInput.value !== passwordInput.value) {
+                    confirmPasswordError.textContent = '两次输入的密码不匹配';
+                    confirmPasswordError.classList.add('show');
+                } else {
+                    confirmPasswordError.classList.remove('show');
+                }
+            });
+        }
+
+        // 发送验证码按钮
+        if (sendCodeBtn) {
+            sendCodeBtn.addEventListener('click', function() {
+                const email = emailInput.value.trim();
+                const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+
+                if (!email) {
+                    emailError.textContent = '请输入邮箱地址';
+                    emailError.classList.add('show');
+                    return;
+                } else if (!emailRegex.test(email)) {
+                    emailError.textContent = '请输入有效的邮箱地址';
+                    emailError.classList.add('show');
+                    return;
+                }
+
+                // 禁用按钮并显示倒计时
+                let countdown = 60;
+                sendCodeBtn.disabled = true;
+                const originalText = sendCodeBtn.textContent;
+                sendCodeBtn.textContent = `${countdown}秒后重试`;
+
+                const timer = setInterval(() => {
+                    countdown--;
+                    sendCodeBtn.textContent = `${countdown}秒后重试`;
+
+                    if (countdown <= 0) {
+                        clearInterval(timer);
+                        sendCodeBtn.disabled = false;
+                        sendCodeBtn.textContent = originalText;
+                    }
+                }, 1000);
+
+                // 发送请求获取验证码
+                fetch('/user/send_verification_code', {
+                    method: 'POST',
+                    headers: {
+                        'Content-Type': 'application/json',
+                    },
+                    body: JSON.stringify({ email: email }),
+                })
+                .then(response => response.json())
+                .then(data => {
+                    console.log("验证码发送响应:", data);  // 添加调试日志
+                    if (data.success) {
+                        showMessage('验证码已发送', '请检查您的邮箱', 'success');
+                    } else {
+                        showMessage('发送失败', data.message || '请稍后重试', 'error');
+                        clearInterval(timer);
+                        sendCodeBtn.disabled = false;
+                        sendCodeBtn.textContent = originalText;
+                    }
+                })
+                .catch(error => {
+                    console.error('Error:', error);
+                    showMessage('发送失败', '网络错误，请稍后重试', 'error');
+                    clearInterval(timer);
+                    sendCodeBtn.disabled = false;
+                    sendCodeBtn.textContent = originalText;
+                });
+            });
+        }
+
+        // 表单提交验证
+        registerForm.addEventListener('submit', function(e) {
+            let isValid = true;
+
+            // 验证用户名
+            if (usernameInput.value.trim() === '') {
+                usernameError.textContent = '用户名不能为空';
+                usernameError.classList.add('show');
+                isValid = false;
+            } else if (usernameInput.value.length < 3) {
+                usernameError.textContent = '用户名至少3个字符';
+                usernameError.classList.add('show');
+                isValid = false;
+            }
+
+            // 验证邮箱
+            const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+            if (emailInput.value.trim() === '') {
+                emailError.textContent = '邮箱不能为空';
+                emailError.classList.add('show');
+                isValid = false;
+            } else if (!emailRegex.test(emailInput.value)) {
+                emailError.textContent = '请输入有效的邮箱地址';
+                emailError.classList.add('show');
+                isValid = false;
+            }
+
+            // 验证密码
+            if (passwordInput.value.trim() === '') {
+                passwordError.textContent = '密码不能为空';
+                passwordError.classList.add('show');
+                isValid = false;
+            } else if (passwordInput.value.length < 6) {
+                passwordError.textContent = '密码长度至少6位';
+                passwordError.classList.add('show');
+                isValid = false;
+            }
+
+            // 验证确认密码
+            if (confirmPasswordInput.value.trim() === '') {
+                confirmPasswordError.textContent = '请确认密码';
+                confirmPasswordError.classList.add('show');
+                isValid = false;
+            } else if (confirmPasswordInput.value !== passwordInput.value) {
+                confirmPasswordError.textContent = '两次输入的密码不匹配';
+                confirmPasswordError.classList.add('show');
+                isValid = false;
+            }
+
+            // 验证验证码
+            if (verificationCodeInput.value.trim() === '') {
+                verificationCodeError.textContent = '请输入验证码';
+                verificationCodeError.classList.add('show');
+                isValid = false;
+            }
+
+            if (!isValid) {
+                e.preventDefault();
+            } else if (registerButton) {
+                registerButton.classList.add('loading-state');
+            }
+        });
+    }
+
+    // 通知消息显示函数
+    function showMessage(title, message, type) {
+        const notification = document.createElement('div');
+        notification.className = `notification ${type}`;
+
+        const icon = type === 'success' ? '✓' : '✗';
+
+        notification.innerHTML = `
+            <div class="notification-icon">${icon}</div>
+            <div class="notification-content">
+                <h3>${title}</h3>
+                <p>${message}</p>
+            </div>
+        `;
+
+        document.body.appendChild(notification);
+
+        setTimeout(() => {
+            notification.classList.add('show');
+        }, 10);
+
+        setTimeout(() => {
+            notification.classList.remove('show');
+            setTimeout(() => {
+                document.body.removeChild(notification);
+            }, 300);
+        }, 3000);
+    }
+});
\ No newline at end of file
diff --git a/app/templates/404.html b/app/templates/404.html
new file mode 100644
index 0000000..1a08b9c
--- /dev/null
+++ b/app/templates/404.html
@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>页面未找到 - 图书管理系统</title>
+    <link rel="stylesheet" href="{{ url_for('static', filename='css/main.css') }}">
+    <style>
+        .error-container {
+            text-align: center;
+            padding: 50px 20px;
+        }
+        .error-code {
+            font-size: 100px;
+            font-weight: bold;
+            color: #4a89dc;
+            margin-bottom: 20px;
+        }
+        .error-message {
+            font-size: 24px;
+            color: #333;
+            margin-bottom: 30px;
+        }
+        .back-button {
+            display: inline-block;
+            padding: 10px 20px;
+            background-color: #4a89dc;
+            color: white;
+            text-decoration: none;
+            border-radius: 5px;
+            font-weight: 500;
+        }
+        .back-button:hover {
+            background-color: #3b78c4;
+        }
+    </style>
+</head>
+<body>
+    <div class="main-container">
+        <div class="error-container">
+            <div class="error-code">404</div>
+            <div class="error-message">页面未找到</div>
+            <p>抱歉，您访问的页面不存在或已被移除。</p>
+            <p style="margin-bottom: 30px;">请检查URL是否正确，或返回首页。</p>
+            <a href="{{ url_for('index') }}" class="back-button">返回首页</a>
+        </div>
+    </div>
+</body>
+</html>
diff --git a/app/templates/base.html b/app/templates/base.html
new file mode 100644
index 0000000..e69de29
diff --git a/app/templates/index.html b/app/templates/index.html
new file mode 100644
index 0000000..4745a9a
--- /dev/null
+++ b/app/templates/index.html
@@ -0,0 +1,214 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>首页 - 图书管理系统</title>
+    <!-- 只引用index页面的专用样式 -->
+    <link rel="stylesheet" href="{{ url_for('static', filename='css/index.css') }}">
+    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
+</head>
+<body>
+    <div class="app-container">
+        <!-- 侧边导航栏 -->
+        <nav class="sidebar">
+            <div class="logo-container">
+                <img src="{{ url_for('static', filename='images/logo.png') }}" alt="Logo" class="logo">
+                <h2>图书管理系统</h2>
+            </div>
+            <ul class="nav-links">
+                <li class="active"><a href="#"><i class="fas fa-home"></i> 首页</a></li>
+                <li><a href="#"><i class="fas fa-book"></i> 图书浏览</a></li>
+                <li><a href="#"><i class="fas fa-bookmark"></i> 我的借阅</a></li>
+                <li><a href="#"><i class="fas fa-bell"></i> 通知公告</a></li>
+                {% if current_user.role_id == 1 %}
+                <li class="nav-category">管理功能</li>
+                <li><a href="#"><i class="fas fa-users"></i> 用户管理</a></li>
+                <li><a href="#"><i class="fas fa-layer-group"></i> 图书管理</a></li>
+                <li><a href="#"><i class="fas fa-exchange-alt"></i> 借阅管理</a></li>
+                <li><a href="#"><i class="fas fa-warehouse"></i> 库存管理</a></li>
+                <li><a href="#"><i class="fas fa-chart-bar"></i> 统计分析</a></li>
+                <li><a href="#"><i class="fas fa-history"></i> 日志管理</a></li>
+                {% endif %}
+            </ul>
+        </nav>
+
+        <!-- 主内容区 -->
+        <main class="main-content">
+            <!-- 顶部导航 -->
+            <header class="top-bar">
+                <div class="search-container">
+                    <i class="fas fa-search search-icon"></i>
+                    <input type="text" placeholder="搜索图书..." class="search-input">
+                </div>
+                <div class="user-menu">
+                    <div class="notifications">
+                        <i class="fas fa-bell"></i>
+                        <span class="badge">3</span>
+                    </div>
+                    <div class="user-info">
+                        <div class="user-avatar">
+                            {{ current_user.username[0] }}
+                        </div>
+                        <div class="user-details">
+                            <span class="user-name">{{ current_user.username }}</span>
+                            <span class="user-role">{{ '管理员' if current_user.role_id == 1 else '普通用户' }}</span>
+                        </div>
+                        <div class="dropdown-menu">
+                            <a href="#"><i class="fas fa-user-circle"></i> 个人中心</a>
+                            <a href="#"><i class="fas fa-cog"></i> 设置</a>
+                            <a href="{{ url_for('user.logout') }}"><i class="fas fa-sign-out-alt"></i> 退出登录</a>
+                        </div>
+                    </div>
+                </div>
+            </header>
+
+            <!-- 欢迎区域 -->
+            <div class="welcome-section">
+                <h1>欢迎回来，{{ current_user.username }}！</h1>
+                <p>今天是 <span id="current-date"></span>，祝您使用愉快。</p>
+            </div>
+
+            <!-- 快速统计 -->
+            <div class="stats-container">
+                <div class="stat-card">
+                    <i class="fas fa-book stat-icon"></i>
+                    <div class="stat-info">
+                        <h3>馆藏总量</h3>
+                        <p class="stat-number">8,567</p>
+                    </div>
+                </div>
+                <div class="stat-card">
+                    <i class="fas fa-users stat-icon"></i>
+                    <div class="stat-info">
+                        <h3>注册用户</h3>
+                        <p class="stat-number">1,245</p>
+                    </div>
+                </div>
+                <div class="stat-card">
+                    <i class="fas fa-exchange-alt stat-icon"></i>
+                    <div class="stat-info">
+                        <h3>当前借阅</h3>
+                        <p class="stat-number">352</p>
+                    </div>
+                </div>
+                <div class="stat-card">
+                    <i class="fas fa-clock stat-icon"></i>
+                    <div class="stat-info">
+                        <h3>待还图书</h3>
+                        <p class="stat-number">{{ 5 }}</p>
+                    </div>
+                </div>
+            </div>
+
+            <!-- 主要内容区 -->
+            <div class="main-sections">
+                <!-- 最新图书 -->
+                <div class="content-section book-section">
+                    <div class="section-header">
+                        <h2>最新图书</h2>
+                        <a href="#" class="view-all">查看全部 <i class="fas fa-arrow-right"></i></a>
+                    </div>
+                    <div class="book-grid">
+                        {% for i in range(4) %}
+                        <div class="book-card">
+                            <div class="book-cover">
+                                <img src="{{ url_for('static', filename='images/book-placeholder.jpg') }}" alt="Book Cover" onerror="this.src='https://via.placeholder.com/150x210?text=No+Cover'">
+                            </div>
+                            <div class="book-info">
+                                <h3 class="book-title">示例图书标题</h3>
+                                <p class="book-author">作者名</p>
+                                <div class="book-meta">
+                                    <span class="book-category">计算机</span>
+                                    <span class="book-status available">可借阅</span>
+                                </div>
+                                <button class="borrow-btn">借阅</button>
+                            </div>
+                        </div>
+                        {% endfor %}
+                    </div>
+                </div>
+
+                <!-- 通知公告 -->
+                <div class="content-section notice-section">
+                    <div class="section-header">
+                        <h2>通知公告</h2>
+                        <a href="#" class="view-all">查看全部 <i class="fas fa-arrow-right"></i></a>
+                    </div>
+                    <div class="notice-list">
+                        <div class="notice-item">
+                            <div class="notice-icon"><i class="fas fa-bullhorn"></i></div>
+                            <div class="notice-content">
+                                <h3>关于五一假期图书馆开放时间调整的通知</h3>
+                                <p>五一期间(5月1日-5日)，图书馆开放时间调整为上午9:00-下午5:00。</p>
+                                <div class="notice-meta">
+                                    <span class="notice-time">2023-04-28</span>
+                                </div>
+                            </div>
+                        </div>
+                        <div class="notice-item">
+                            <div class="notice-icon"><i class="fas fa-bell"></i></div>
+                            <div class="notice-content">
+                                <h3>您有2本图书即将到期</h3>
+                                <p>《Python编程》《算法导论》将于3天后到期，请及时归还或办理续借。</p>
+                                <div class="notice-meta">
+                                    <span class="notice-time">2023-04-27</span>
+                                    <button class="renew-btn">一键续借</button>
+                                </div>
+                            </div>
+                        </div>
+                    </div>
+                </div>
+            </div>
+
+            <!-- 热门图书区域 -->
+            <div class="content-section popular-section">
+                <div class="section-header">
+                    <h2>热门图书</h2>
+                    <a href="#" class="view-all">查看全部 <i class="fas fa-arrow-right"></i></a>
+                </div>
+                <div class="popular-books">
+                    {% for i in range(5) %}
+                    <div class="popular-book-item">
+                        <div class="rank-badge">{{ i+1 }}</div>
+                        <div class="book-cover small">
+                            <img src="https://via.placeholder.com/80x120?text=Book" alt="Book Cover">
+                        </div>
+                        <div class="book-details">
+                            <h3 class="book-title">热门图书标题示例</h3>
+                            <p class="book-author">知名作者</p>
+                            <div class="book-stats">
+                                <span><i class="fas fa-eye"></i> 1024 次浏览</span>
+                                <span><i class="fas fa-bookmark"></i> 89 次借阅</span>
+                            </div>
+                        </div>
+                    </div>
+                    {% endfor %}
+                </div>
+            </div>
+        </main>
+    </div>
+
+    <script>
+        document.addEventListener('DOMContentLoaded', function() {
+            // 设置当前日期
+            const now = new Date();
+            const options = { year: 'numeric', month: 'long', day: 'numeric', weekday: 'long' };
+            document.getElementById('current-date').textContent = now.toLocaleDateString('zh-CN', options);
+
+            // 用户菜单下拉
+            const userInfo = document.querySelector('.user-info');
+            userInfo.addEventListener('click', function(e) {
+                userInfo.classList.toggle('active');
+            });
+
+            // 点击其他区域关闭下拉菜单
+            document.addEventListener('click', function(e) {
+                if (!userInfo.contains(e.target)) {
+                    userInfo.classList.remove('active');
+                }
+            });
+        });
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/app/templates/login.html b/app/templates/login.html
new file mode 100644
index 0000000..223d27c
--- /dev/null
+++ b/app/templates/login.html
@@ -0,0 +1,92 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>用户登录 - 图书管理系统</title>
+    <link rel="stylesheet" href="{{ url_for('static', filename='css/main.css') }}">
+</head>
+<body>
+    <div class="overlay"></div>
+
+    <div class="theme-toggle" id="theme-toggle">☀️</div>
+
+    <div class="main-container">
+        <div class="login-container">
+            <div class="logo">
+                <img src="{{ url_for('static', filename='images/logo.png') }}" alt="Logo">
+            </div>
+            <h1>图书管理系统</h1>
+            <p class="subtitle">欢迎回来，请登录您的账户</p>
+
+            <div id="account-login">
+                <form id="login-form" action="{{ url_for('user.login') }}" method="post">
+                    <div class="form-group">
+                        <label for="username">用户名/邮箱</label>
+                        <div class="input-with-icon">
+                            <span class="input-icon">👤</span>
+                            <input type="text" id="username" name="username" class="form-control" placeholder="请输入账号">
+                        </div>
+                        <div class="validation-message" id="username-error"></div>
+                    </div>
+
+                    <div class="form-group">
+                        <label for="password">密码</label>
+                        <div class="input-with-icon">
+                            <span class="input-icon">🔒</span>
+                            <input type="password" id="password" name="password" class="form-control" placeholder="请输入密码">
+                            <span class="password-toggle" id="password-toggle">👁️</span>
+                        </div>
+                        <div class="validation-message" id="password-error"></div>
+                    </div>
+
+                    <div class="remember-forgot">
+                        <label class="custom-checkbox">
+                            <input type="checkbox" name="remember_me">
+                            <span class="checkmark"></span>
+                            记住我 (7天内免登录)
+                        </label>
+                        <div class="forgot-password">
+                            <a href="#">忘记密码？</a>
+                        </div>
+                    </div>
+
+                    {% if error %}
+                    <div class="alert alert-danger">{{ error }}</div>
+                    {% endif %}
+
+                    <button type="submit" class="btn-login" id="login-button">
+                        <span>登录</span>
+                        <span class="loading">⟳</span>
+                    </button>
+                </form>
+
+                <div class="signup">
+                    还没有账号？ <a href="{{ url_for('user.register') }}">立即注册</a>
+                </div>
+
+                <div class="features">
+                    <div class="feature-item">
+                        <span class="feature-icon">🔒</span>
+                        <span>安全登录</span>
+                    </div>
+                    <div class="feature-item">
+                        <span class="feature-icon">🔐</span>
+                        <span>数据加密</span>
+                    </div>
+                    <div class="feature-item">
+                        <span class="feature-icon">📚</span>
+                        <span>图书管理</span>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+
+    <footer>
+        <p>© 2025 图书管理系统 - 版权所有</p>
+    </footer>
+
+    <script src="{{ url_for('static', filename='js/main.js') }}"></script>
+</body>
+</html>
\ No newline at end of file
diff --git a/app/templates/register.html b/app/templates/register.html
new file mode 100644
index 0000000..f1b3f90
--- /dev/null
+++ b/app/templates/register.html
@@ -0,0 +1,93 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>用户注册 - 图书管理系统</title>
+    <link rel="stylesheet" href="{{ url_for('static', filename='css/main.css') }}">
+</head>
+<body>
+    <div class="overlay"></div>
+
+    <div class="theme-toggle" id="theme-toggle">☀️</div>
+
+    <div class="main-container">
+        <div class="login-container register-container">
+            <div class="logo">
+                <img src="{{ url_for('static', filename='images/logo.png') }}" alt="Logo">
+            </div>
+            <h1>图书管理系统</h1>
+            <p class="subtitle">创建您的新账户</p>
+
+            <div id="register-form-container">
+                <form id="register-form" action="{{ url_for('user.register') }}" method="post">
+                    <div class="form-group">
+                        <label for="username">用户名</label>
+                        <div class="input-with-icon">
+                            <span class="input-icon">👤</span>
+                            <input type="text" id="username" name="username" class="form-control" placeholder="请输入用户名" required>
+                        </div>
+                        <div class="validation-message" id="username-error"></div>
+                    </div>
+
+                    <div class="form-group">
+                        <label for="email">邮箱</label>
+                        <div class="input-with-icon">
+                            <span class="input-icon">📧</span>
+                            <input type="email" id="email" name="email" class="form-control" placeholder="请输入邮箱" required>
+                        </div>
+                        <div class="validation-message" id="email-error"></div>
+                    </div>
+
+                    <div class="form-group">
+                        <label for="verification_code">邮箱验证码</label>
+                        <div class="verification-code-container">
+                            <input type="text" id="verification_code" name="verification_code" class="verification-input" placeholder="请输入验证码" required>
+                            <button type="button" id="send-code-btn" class="send-code-btn">发送验证码</button>
+                        </div>
+                        <div class="validation-message" id="verification-code-error"></div>
+                    </div>
+
+                    <div class="form-group">
+                        <label for="password">密码</label>
+                        <div class="input-with-icon">
+                            <span class="input-icon">🔒</span>
+                            <input type="password" id="password" name="password" class="form-control" placeholder="请设置密码" required>
+                            <span class="password-toggle" id="password-toggle">👁️</span>
+                        </div>
+                        <div class="validation-message" id="password-error"></div>
+                    </div>
+
+                    <div class="form-group">
+                        <label for="confirm_password">确认密码</label>
+                        <div class="input-with-icon">
+                            <span class="input-icon">🔒</span>
+                            <input type="password" id="confirm_password" name="confirm_password" class="form-control" placeholder="请再次输入密码" required>
+                        </div>
+                        <div class="validation-message" id="confirm-password-error"></div>
+                    </div>
+
+                    {% if error %}
+                    <div class="alert alert-danger">{{ error }}</div>
+                    {% endif %}
+
+                    <button type="submit" class="btn-login" id="register-button">
+                        <span>注册</span>
+                        <span class="loading">⟳</span>
+                    </button>
+                </form>
+
+                <div class="signup">
+                    已有账号？ <a href="{{ url_for('user.login') }}">返回登录</a>
+                </div>
+            </div>
+        </div>
+    </div>
+
+    <footer>
+        <p>© 2025 图书管理系统 - 版权所有</p>
+    </footer>
+
+    <script src="{{ url_for('static', filename='js/main.js') }}"></script>
+</body>
+</html>
\ No newline at end of file
diff --git a/app/utils/__init__.py b/app/utils/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/utils/auth.py b/app/utils/auth.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/utils/db.py b/app/utils/db.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/utils/email.py b/app/utils/email.py
new file mode 100644
index 0000000..36f95ce
--- /dev/null
+++ b/app/utils/email.py
@@ -0,0 +1,91 @@
+import smtplib
+import random
+import string
+from email.mime.text import MIMEText
+from email.mime.multipart import MIMEMultipart
+from flask import current_app
+import logging
+
+# 配置日志
+logging.basicConfig(level=logging.DEBUG)
+logger = logging.getLogger(__name__)
+
+
+# 配置邮件发送功能
+def send_verification_email(to_email, verification_code):
+    """
+    发送验证码邮件
+    """
+    try:
+        # 从应用配置获取邮件设置
+        email_host = current_app.config['EMAIL_HOST']
+        email_port = current_app.config['EMAIL_PORT']
+        email_username = current_app.config['EMAIL_USERNAME']
+        email_password = current_app.config['EMAIL_PASSWORD']
+        email_from = current_app.config['EMAIL_FROM']
+        email_from_name = current_app.config['EMAIL_FROM_NAME']
+
+        logger.info(f"准备发送邮件到: {to_email}, 验证码: {verification_code}")
+        logger.debug(f"邮件配置: 主机={email_host}, 端口={email_port}")
+
+        # 邮件内容
+        msg = MIMEMultipart()
+        msg['From'] = f"{email_from_name} <{email_from}>"
+        msg['To'] = to_email
+        msg['Subject'] = "图书管理系统 - 验证码"
+
+        # 邮件正文
+        body = f"""
+        <html>
+        <body>
+            <div style="font-family: Arial, sans-serif; max-width: 600px; margin: 0 auto; padding: 20px; border: 1px solid #e1e1e1; border-radius: 5px;">
+                <h2 style="color: #4a89dc;">图书管理系统 - 邮箱验证</h2>
+                <p>您好，</p>
+                <p>感谢您注册图书管理系统，您的验证码是:</p>
+                <div style="background-color: #f5f5f5; padding: 10px; border-radius: 5px; text-align: center; font-size: 24px; letter-spacing: 5px; font-weight: bold; margin: 20px 0;">
+                    {verification_code}
+                </div>
+                <p>该验证码将在10分钟内有效，请勿将验证码分享给他人。</p>
+                <p>如果您没有请求此验证码，请忽略此邮件。</p>
+                <div style="margin-top: 30px; padding-top: 20px; border-top: 1px solid #e1e1e1; font-size: 12px; color: #888;">
+                    <p>此邮件为系统自动发送，请勿回复。</p>
+                    <p>&copy; 2025 图书管理系统</p>
+                </div>
+            </div>
+        </body>
+        </html>
+        """
+
+        msg.attach(MIMEText(body, 'html'))
+
+        logger.debug("尝试连接到SMTP服务器...")
+        # 连接服务器发送邮件
+        server = smtplib.SMTP(email_host, email_port)
+        server.set_debuglevel(1)  # 启用详细的SMTP调试输出
+
+        logger.debug("检查是否需要STARTTLS加密...")
+        if current_app.config.get('EMAIL_ENCRYPTION') == 'starttls':
+            logger.debug("启用STARTTLS...")
+            server.starttls()
+
+        logger.debug(f"尝试登录邮箱: {email_username}")
+        server.login(email_username, email_password)
+
+        logger.debug("发送邮件...")
+        server.send_message(msg)
+
+        logger.debug("关闭连接...")
+        server.quit()
+
+        logger.info(f"邮件发送成功: {to_email}")
+        return True
+    except Exception as e:
+        logger.error(f"邮件发送失败: {str(e)}", exc_info=True)
+        return False
+
+
+def generate_verification_code(length=6):
+    """
+    生成数字验证码
+    """
+    return ''.join(random.choice(string.digits) for _ in range(length))
diff --git a/app/utils/helpers.py b/app/utils/helpers.py
new file mode 100644
index 0000000..e69de29
diff --git a/code_collection.txt b/code_collection.txt
new file mode 100644
index 0000000..22f4572
--- /dev/null
+++ b/code_collection.txt
@@ -0,0 +1,2640 @@
+
+================================================================================
+File: ./config.py
+================================================================================
+
+import os
+
+# 数据库配置
+DB_HOST = os.environ.get('DB_HOST', '27.124.22.104')
+DB_PORT = os.environ.get('DB_PORT', '3306')
+DB_USER = os.environ.get('DB_USER', 'book20250428')
+DB_PASSWORD = os.environ.get('DB_PASSWORD', 'booksystem')
+DB_NAME = os.environ.get('DB_NAME', 'book_system')
+
+# 数据库连接字符串
+SQLALCHEMY_DATABASE_URI = f'mysql+pymysql://{DB_USER}:{DB_PASSWORD}@{DB_HOST}:{DB_PORT}/{DB_NAME}'
+SQLALCHEMY_TRACK_MODIFICATIONS = False
+
+# 应用密钥
+SECRET_KEY = os.environ.get('SECRET_KEY', 'dev_key_replace_in_production')
+
+# 邮件配置
+EMAIL_HOST = os.environ.get('EMAIL_HOST', 'smtp.qq.com')
+EMAIL_PORT = int(os.environ.get('EMAIL_PORT', 587))
+EMAIL_ENCRYPTION = os.environ.get('EMAIL_ENCRYPTION', 'starttls')
+EMAIL_USERNAME = os.environ.get('EMAIL_USERNAME', '3399560459@qq.com')
+EMAIL_PASSWORD = os.environ.get('EMAIL_PASSWORD', 'fzwhyirhbqdzcjgf')
+EMAIL_FROM = os.environ.get('EMAIL_FROM', '3399560459@qq.com')
+EMAIL_FROM_NAME = os.environ.get('EMAIL_FROM_NAME', 'BOOKSYSTEM_OFFICIAL')
+
+# 会话配置
+PERMANENT_SESSION_LIFETIME = 86400 * 7
+================================================================================
+File: ./all_file_output.py
+================================================================================
+
+import os
+import sys
+
+
+def collect_code_files(output_file="code_collection.txt"):
+    # 定义代码文件扩展名
+    code_extensions = [
+        '.py', '.java', '.cpp', '.c', '.h', '.hpp', '.cs',
+        '.js', '.html', '.css', '.php', '.go', '.rb',
+        '.swift', '.kt', '.ts', '.sh', '.pl', '.r'
+    ]
+
+    # 定义要排除的目录
+    excluded_dirs = [
+        'venv', 'env', '.venv', '.env', 'virtualenv',
+        '__pycache__', 'node_modules', '.git', '.idea',
+        'dist', 'build', 'target', 'bin'
+    ]
+
+    # 计数器
+    file_count = 0
+
+    # 打开输出文件
+    with open(output_file, 'w', encoding='utf-8') as out_file:
+        # 遍历当前目录及所有子目录
+        for root, dirs, files in os.walk('.'):
+            # 从dirs中移除排除的目录，这会阻止os.walk进入这些目录
+            dirs[:] = [d for d in dirs if d not in excluded_dirs]
+
+            for file in files:
+                # 获取文件扩展名
+                _, ext = os.path.splitext(file)
+
+                # 检查是否为代码文件
+                if ext.lower() in code_extensions:
+                    file_path = os.path.join(root, file)
+                    file_count += 1
+
+                    # 写入文件路径作为分隔
+                    out_file.write(f"\n{'=' * 80}\n")
+                    out_file.write(f"File: {file_path}\n")
+                    out_file.write(f"{'=' * 80}\n\n")
+
+                    # 尝试读取文件内容并写入
+                    try:
+                        with open(file_path, 'r', encoding='utf-8') as code_file:
+                            out_file.write(code_file.read())
+                    except UnicodeDecodeError:
+                        # 尝试用不同的编码
+                        try:
+                            with open(file_path, 'r', encoding='latin-1') as code_file:
+                                out_file.write(code_file.read())
+                        except Exception as e:
+                            out_file.write(f"无法读取文件内容: {str(e)}\n")
+                    except Exception as e:
+                        out_file.write(f"读取文件时出错: {str(e)}\n")
+
+    print(f"已成功收集 {file_count} 个代码文件到 {output_file}")
+
+
+if __name__ == "__main__":
+    # 如果提供了命令行参数，则使用它作为输出文件名
+    output_file = sys.argv[1] if len(sys.argv) > 1 else "code_collection.txt"
+    collect_code_files(output_file)
+================================================================================
+File: ./app.py
+================================================================================
+
+from app import create_app
+
+app = create_app()
+
+if __name__ == '__main__':
+    app.run(debug=True, host='0.0.0.0', port=49666)
+
+================================================================================
+File: ./main.py
+================================================================================
+
+# 这是一个示例 Python 脚本。
+
+# 按 ⌃R 执行或将其替换为您的代码。
+# 按 双击 ⇧ 在所有地方搜索类、文件、工具窗口、操作和设置。
+
+
+def print_hi(name):
+    # 在下面的代码行中使用断点来调试脚本。
+    print(f'Hi, {name}')  # 按 ⌘F8 切换断点。
+
+
+# 按间距中的绿色按钮以运行脚本。
+if __name__ == '__main__':
+    print_hi('PyCharm')
+
+# 访问 https://www.jetbrains.com/help/pycharm/ 获取 PyCharm 帮助
+
+================================================================================
+File: ./app/__init__.py
+================================================================================
+
+from flask import Flask, render_template, session, g
+from app.models.user import db, User
+from app.controllers.user import user_bp
+import os
+
+
+def create_app():
+    app = Flask(__name__)
+
+    # 配置应用
+    app.config.from_mapping(
+        SECRET_KEY=os.environ.get('SECRET_KEY', 'dev_key_replace_in_production'),
+        SQLALCHEMY_DATABASE_URI='mysql+pymysql://book20250428:booksystem@27.124.22.104/book_system',
+        SQLALCHEMY_TRACK_MODIFICATIONS=False,
+        PERMANENT_SESSION_LIFETIME=86400 * 7,  # 7天
+
+        # 邮件配置
+        EMAIL_HOST='smtp.qq.com',
+        EMAIL_PORT=587,
+        EMAIL_ENCRYPTION='starttls',
+        EMAIL_USERNAME='3399560459@qq.com',
+        EMAIL_PASSWORD='fzwhyirhbqdzcjgf',  # 这是你的SMTP授权码，不是邮箱密码
+        EMAIL_FROM='3399560459@qq.com',
+        EMAIL_FROM_NAME='BOOKSYSTEM_OFFICIAL'
+    )
+
+    # 实例配置，如果存在
+    app.config.from_pyfile('config.py', silent=True)
+
+    # 初始化数据库
+    db.init_app(app)
+
+    # 注册蓝图
+    app.register_blueprint(user_bp, url_prefix='/user')
+
+    # 创建数据库表
+    with app.app_context():
+        db.create_all()
+
+        # 创建默认角色
+        from app.models.user import Role
+        if not Role.query.filter_by(id=1).first():
+            admin_role = Role(id=1, role_name='管理员', description='系统管理员')
+            db.session.add(admin_role)
+
+        if not Role.query.filter_by(id=2).first():
+            user_role = Role(id=2, role_name='普通用户', description='普通用户')
+            db.session.add(user_role)
+
+        # 创建管理员账号
+        if not User.query.filter_by(username='admin').first():
+            admin = User(
+                username='admin',
+                password='admin123',
+                email='admin@example.com',
+                role_id=1,
+                nickname='系统管理员'
+            )
+            db.session.add(admin)
+
+        db.session.commit()
+
+    # 请求前处理
+    @app.before_request
+    def load_logged_in_user():
+        user_id = session.get('user_id')
+
+        if user_id is None:
+            g.user = None
+        else:
+            g.user = User.query.get(user_id)
+
+    # 首页路由
+    @app.route('/')
+    def index():
+        if not g.user:
+            return render_template('login.html')
+        return render_template('index.html', current_user=g.user)
+
+    # 错误处理
+    @app.errorhandler(404)
+    def page_not_found(e):
+        return render_template('404.html'), 404
+
+    return app
+================================================================================
+File: ./app/utils/auth.py
+================================================================================
+
+
+================================================================================
+File: ./app/utils/db.py
+================================================================================
+
+
+================================================================================
+File: ./app/utils/__init__.py
+================================================================================
+
+
+================================================================================
+File: ./app/utils/email.py
+================================================================================
+
+import smtplib
+import random
+import string
+from email.mime.text import MIMEText
+from email.mime.multipart import MIMEMultipart
+from flask import current_app
+import logging
+
+# 配置日志
+logging.basicConfig(level=logging.DEBUG)
+logger = logging.getLogger(__name__)
+
+
+# 配置邮件发送功能
+def send_verification_email(to_email, verification_code):
+    """
+    发送验证码邮件
+    """
+    try:
+        # 从应用配置获取邮件设置
+        email_host = current_app.config['EMAIL_HOST']
+        email_port = current_app.config['EMAIL_PORT']
+        email_username = current_app.config['EMAIL_USERNAME']
+        email_password = current_app.config['EMAIL_PASSWORD']
+        email_from = current_app.config['EMAIL_FROM']
+        email_from_name = current_app.config['EMAIL_FROM_NAME']
+
+        logger.info(f"准备发送邮件到: {to_email}, 验证码: {verification_code}")
+        logger.debug(f"邮件配置: 主机={email_host}, 端口={email_port}")
+
+        # 邮件内容
+        msg = MIMEMultipart()
+        msg['From'] = f"{email_from_name} <{email_from}>"
+        msg['To'] = to_email
+        msg['Subject'] = "图书管理系统 - 验证码"
+
+        # 邮件正文
+        body = f"""
+        <html>
+        <body>
+            <div style="font-family: Arial, sans-serif; max-width: 600px; margin: 0 auto; padding: 20px; border: 1px solid #e1e1e1; border-radius: 5px;">
+                <h2 style="color: #4a89dc;">图书管理系统 - 邮箱验证</h2>
+                <p>您好，</p>
+                <p>感谢您注册图书管理系统，您的验证码是:</p>
+                <div style="background-color: #f5f5f5; padding: 10px; border-radius: 5px; text-align: center; font-size: 24px; letter-spacing: 5px; font-weight: bold; margin: 20px 0;">
+                    {verification_code}
+                </div>
+                <p>该验证码将在10分钟内有效，请勿将验证码分享给他人。</p>
+                <p>如果您没有请求此验证码，请忽略此邮件。</p>
+                <div style="margin-top: 30px; padding-top: 20px; border-top: 1px solid #e1e1e1; font-size: 12px; color: #888;">
+                    <p>此邮件为系统自动发送，请勿回复。</p>
+                    <p>&copy; 2025 图书管理系统</p>
+                </div>
+            </div>
+        </body>
+        </html>
+        """
+
+        msg.attach(MIMEText(body, 'html'))
+
+        logger.debug("尝试连接到SMTP服务器...")
+        # 连接服务器发送邮件
+        server = smtplib.SMTP(email_host, email_port)
+        server.set_debuglevel(1)  # 启用详细的SMTP调试输出
+
+        logger.debug("检查是否需要STARTTLS加密...")
+        if current_app.config.get('EMAIL_ENCRYPTION') == 'starttls':
+            logger.debug("启用STARTTLS...")
+            server.starttls()
+
+        logger.debug(f"尝试登录邮箱: {email_username}")
+        server.login(email_username, email_password)
+
+        logger.debug("发送邮件...")
+        server.send_message(msg)
+
+        logger.debug("关闭连接...")
+        server.quit()
+
+        logger.info(f"邮件发送成功: {to_email}")
+        return True
+    except Exception as e:
+        logger.error(f"邮件发送失败: {str(e)}", exc_info=True)
+        return False
+
+
+def generate_verification_code(length=6):
+    """
+    生成数字验证码
+    """
+    return ''.join(random.choice(string.digits) for _ in range(length))
+
+================================================================================
+File: ./app/utils/helpers.py
+================================================================================
+
+
+================================================================================
+File: ./app/models/user.py
+================================================================================
+
+from flask_sqlalchemy import SQLAlchemy
+from werkzeug.security import generate_password_hash, check_password_hash
+from datetime import datetime
+
+db = SQLAlchemy()
+
+
+class User(db.Model):
+    __tablename__ = 'users'
+
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    username = db.Column(db.String(64), unique=True, nullable=False)
+    password = db.Column(db.String(255), nullable=False)
+    email = db.Column(db.String(128), unique=True, nullable=True)
+    phone = db.Column(db.String(20), unique=True, nullable=True)
+    nickname = db.Column(db.String(64), nullable=True)
+    status = db.Column(db.Integer, default=1)  # 1: active, 0: disabled
+    role_id = db.Column(db.Integer, db.ForeignKey('roles.id'), default=2)  # 2: 普通用户, 1: 管理员
+    created_at = db.Column(db.DateTime, default=datetime.now)
+    updated_at = db.Column(db.DateTime, default=datetime.now, onupdate=datetime.now)
+
+    def __init__(self, username, password, email=None, phone=None, nickname=None, role_id=2):
+        self.username = username
+        self.set_password(password)
+        self.email = email
+        self.phone = phone
+        self.nickname = nickname
+        self.role_id = role_id
+
+    def set_password(self, password):
+        """设置密码，使用哈希加密"""
+        self.password = generate_password_hash(password)
+
+    def check_password(self, password):
+        """验证密码"""
+        return check_password_hash(self.password, password)
+
+    def to_dict(self):
+        """转换为字典格式"""
+        return {
+            'id': self.id,
+            'username': self.username,
+            'email': self.email,
+            'phone': self.phone,
+            'nickname': self.nickname,
+            'status': self.status,
+            'role_id': self.role_id,
+            'created_at': self.created_at.strftime('%Y-%m-%d %H:%M:%S'),
+            'updated_at': self.updated_at.strftime('%Y-%m-%d %H:%M:%S')
+        }
+
+    @classmethod
+    def create_user(cls, username, password, email=None, phone=None, nickname=None, role_id=2):
+        """创建新用户"""
+        user = User(
+            username=username,
+            password=password,
+            email=email,
+            phone=phone,
+            nickname=nickname,
+            role_id=role_id
+        )
+        db.session.add(user)
+        db.session.commit()
+        return user
+
+
+class Role(db.Model):
+    __tablename__ = 'roles'
+
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    role_name = db.Column(db.String(32), unique=True, nullable=False)
+    description = db.Column(db.String(128))
+
+    users = db.relationship('User', backref='role')
+
+================================================================================
+File: ./app/models/log.py
+================================================================================
+
+
+================================================================================
+File: ./app/models/notification.py
+================================================================================
+
+
+================================================================================
+File: ./app/models/__init__.py
+================================================================================
+
+
+================================================================================
+File: ./app/models/book.py
+================================================================================
+
+
+================================================================================
+File: ./app/models/borrow.py
+================================================================================
+
+
+================================================================================
+File: ./app/models/announcement.py
+================================================================================
+
+
+================================================================================
+File: ./app/models/inventory.py
+================================================================================
+
+
+================================================================================
+File: ./app/static/css/index.css
+================================================================================
+
+/* index.css - 仅用于图书管理系统首页/仪表板 */
+
+* {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
+}
+
+body {
+    background-color: #f5f7fa;
+    color: #333;
+    font-size: 16px;
+    line-height: 1.6;
+}
+
+a {
+    text-decoration: none;
+    color: #4a89dc;
+}
+
+ul {
+    list-style: none;
+}
+
+/* 应用容器 */
+.app-container {
+    display: flex;
+    min-height: 100vh;
+}
+
+/* 侧边导航栏 */
+.sidebar {
+    width: 250px;
+    background-color: #2c3e50;
+    color: #ecf0f1;
+    padding: 20px 0;
+    box-shadow: 0 0 10px rgba(0,0,0,0.1);
+    position: fixed;
+    height: 100vh;
+    overflow-y: auto;
+}
+
+.logo-container {
+    padding: 0 20px 20px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    flex-direction: column;
+    margin-bottom: 20px;
+    border-bottom: 1px solid rgba(255,255,255,0.1);
+}
+
+.logo {
+    width: 60px;
+    height: auto;
+    margin-bottom: 10px;
+}
+
+.logo-container h2 {
+    font-size: 1.2rem;
+    margin: 10px 0;
+    color: #ecf0f1;
+    font-weight: 500;
+}
+
+.nav-links li {
+    margin-bottom: 5px;
+}
+
+.nav-links li a {
+    padding: 10px 20px;
+    display: flex;
+    align-items: center;
+    color: #bdc3c7;
+    transition: all 0.3s ease;
+}
+
+.nav-links li a i {
+    margin-right: 10px;
+    font-size: 1.1rem;
+    width: 20px;
+    text-align: center;
+}
+
+.nav-links li a:hover, .nav-links li.active a {
+    background-color: #34495e;
+    color: #ecf0f1;
+    border-left: 3px solid #4a89dc;
+}
+
+.nav-category {
+    padding: 10px 20px;
+    font-size: 0.85rem;
+    text-transform: uppercase;
+    color: #7f8c8d;
+    margin-top: 15px;
+    margin-bottom: 5px;
+}
+
+/* 主内容区 */
+.main-content {
+    flex: 1;
+    margin-left: 250px;
+    padding: 20px;
+}
+
+/* 顶部导航栏 */
+.top-bar {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    padding: 15px 30px;
+    background-color: #fff;
+    border-radius: 8px;
+    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
+    margin-bottom: 20px;
+}
+
+.search-container {
+    position: relative;
+    width: 300px;
+}
+
+.search-input {
+    padding: 10px 15px 10px 40px;
+    width: 100%;
+    border: 1px solid #e1e4e8;
+    border-radius: 20px;
+    font-size: 14px;
+    transition: all 0.3s ease;
+}
+
+.search-input:focus {
+    border-color: #4a89dc;
+    box-shadow: 0 0 0 3px rgba(74, 137, 220, 0.1);
+    outline: none;
+}
+
+.search-icon {
+    position: absolute;
+    left: 15px;
+    top: 50%;
+    transform: translateY(-50%);
+    color: #8492a6;
+}
+
+.user-menu {
+    display: flex;
+    align-items: center;
+}
+
+.notifications {
+    margin-right: 20px;
+    position: relative;
+    cursor: pointer;
+}
+
+.notifications i {
+    font-size: 1.2rem;
+    color: #606266;
+}
+
+.badge {
+    position: absolute;
+    top: -8px;
+    right: -8px;
+    background-color: #f56c6c;
+    color: white;
+    font-size: 0.7rem;
+    width: 18px;
+    height: 18px;
+    border-radius: 50%;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+}
+
+.user-info {
+    display: flex;
+    align-items: center;
+    position: relative;
+    cursor: pointer;
+}
+
+.user-avatar {
+    width: 40px;
+    height: 40px;
+    border-radius: 50%;
+    background-color: #4a89dc;
+    color: white;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    font-weight: bold;
+    margin-right: 10px;
+    font-size: 1.2rem;
+}
+
+.user-details {
+    display: flex;
+    flex-direction: column;
+}
+
+.user-name {
+    font-weight: 500;
+    color: #333;
+}
+
+.user-role {
+    font-size: 0.8rem;
+    color: #8492a6;
+}
+
+.dropdown-menu {
+    position: absolute;
+    top: 100%;
+    right: 0;
+    background-color: white;
+    border-radius: 4px;
+    box-shadow: 0 2px 12px 0 rgba(0,0,0,0.1);
+    padding: 10px 0;
+    min-width: 150px;
+    display: none;
+    z-index: 10;
+}
+
+.user-info.active .dropdown-menu {
+    display: block;
+}
+
+.dropdown-menu a {
+    display: block;
+    padding: 8px 15px;
+    color: #606266;
+    transition: all 0.3s ease;
+}
+
+.dropdown-menu a:hover {
+    background-color: #f5f7fa;
+}
+
+.dropdown-menu a i {
+    margin-right: 8px;
+    width: 16px;
+    text-align: center;
+}
+
+/* 欢迎区域 */
+.welcome-section {
+    background: linear-gradient(to right, #4a89dc, #5d9cec);
+    color: white;
+    padding: 30px;
+    border-radius: 8px;
+    margin-bottom: 20px;
+    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
+}
+
+.welcome-section h1 {
+    font-size: 1.8rem;
+    margin-bottom: 5px;
+}
+
+.welcome-section p {
+    font-size: 1rem;
+    opacity: 0.9;
+}
+
+/* 统计卡片样式 */
+.stats-container {
+    display: grid;
+    grid-template-columns: repeat(4, 1fr);
+    gap: 20px;
+    margin-bottom: 30px;
+}
+
+.stat-card {
+    background-color: white;
+    border-radius: 8px;
+    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
+    padding: 20px;
+    display: flex;
+    align-items: center;
+    transition: transform 0.3s ease, box-shadow 0.3s ease;
+}
+
+.stat-card:hover {
+    transform: translateY(-5px);
+    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
+}
+
+.stat-icon {
+    font-size: 2rem;
+    color: #4a89dc;
+    margin-right: 15px;
+    width: 40px;
+    text-align: center;
+}
+
+.stat-info h3 {
+    font-size: 0.9rem;
+    color: #606266;
+    margin-bottom: 5px;
+}
+
+.stat-number {
+    font-size: 1.8rem;
+    font-weight: 600;
+    color: #2c3e50;
+}
+
+/* 主要内容区域 */
+.main-sections {
+    display: grid;
+    grid-template-columns: 2fr 1fr;
+    gap: 20px;
+    margin-bottom: 30px;
+}
+
+.content-section {
+    background-color: white;
+    border-radius: 8px;
+    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
+    padding: 20px;
+}
+
+.section-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    margin-bottom: 20px;
+    padding-bottom: 10px;
+    border-bottom: 1px solid #edf2f7;
+}
+
+.section-header h2 {
+    font-size: 1.2rem;
+    color: #2c3e50;
+}
+
+.view-all {
+    font-size: 0.85rem;
+    color: #4a89dc;
+    display: flex;
+    align-items: center;
+}
+
+.view-all i {
+    margin-left: 5px;
+    transition: transform 0.3s ease;
+}
+
+.view-all:hover i {
+    transform: translateX(3px);
+}
+
+/* 图书卡片样式 */
+.book-grid {
+    display: grid;
+    grid-template-columns: repeat(2, 1fr);
+    gap: 20px;
+}
+
+.book-card {
+    display: flex;
+    border: 1px solid #edf2f7;
+    border-radius: 8px;
+    overflow: hidden;
+    transition: transform 0.3s ease, box-shadow 0.3s ease;
+}
+
+.book-card:hover {
+    transform: translateY(-5px);
+    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
+}
+
+.book-cover {
+    width: 100px;
+    height: 140px;
+    min-width: 100px;
+    background-color: #f5f7fa;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    overflow: hidden;
+}
+
+.book-cover img {
+    width: 100%;
+    height: 100%;
+    object-fit: cover;
+}
+
+.book-info {
+    padding: 15px;
+    flex: 1;
+    display: flex;
+    flex-direction: column;
+}
+
+.book-title {
+    font-size: 1rem;
+    margin-bottom: 5px;
+    color: #2c3e50;
+    display: -webkit-box;
+    -webkit-line-clamp: 1;
+    -webkit-box-orient: vertical;
+    overflow: hidden;
+}
+
+.book-author {
+    font-size: 0.85rem;
+    color: #606266;
+    margin-bottom: 10px;
+}
+
+.book-meta {
+    display: flex;
+    justify-content: space-between;
+    margin-bottom: 15px;
+}
+
+.book-category {
+    background-color: #e5f1ff;
+    color: #4a89dc;
+    padding: 3px 8px;
+    border-radius: 4px;
+    font-size: 0.75rem;
+}
+
+.book-status {
+    font-size: 0.75rem;
+    font-weight: 500;
+}
+
+.book-status.available {
+    color: #67c23a;
+}
+
+.book-status.borrowed {
+    color: #e6a23c;
+}
+
+.borrow-btn {
+    background-color: #4a89dc;
+    color: white;
+    border: none;
+    padding: 6px 12px;
+    border-radius: 4px;
+    cursor: pointer;
+    font-size: 0.85rem;
+    margin-top: auto;
+    transition: background-color 0.3s ease;
+}
+
+.borrow-btn:hover {
+    background-color: #357bc8;
+}
+
+/* 通知公告样式 */
+.notice-item {
+    display: flex;
+    padding: 15px 0;
+    border-bottom: 1px solid #edf2f7;
+}
+
+.notice-item:last-child {
+    border-bottom: none;
+}
+
+.notice-icon {
+    font-size: 1.5rem;
+    color: #4a89dc;
+    margin-right: 15px;
+    display: flex;
+    align-items: flex-start;
+    padding-top: 5px;
+}
+
+.notice-content h3 {
+    font-size: 1rem;
+    color: #2c3e50;
+    margin-bottom: 5px;
+}
+
+.notice-content p {
+    font-size: 0.9rem;
+    color: #606266;
+    margin-bottom: 10px;
+}
+
+.notice-meta {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+}
+
+.notice-time {
+    font-size: 0.8rem;
+    color: #8492a6;
+}
+
+.renew-btn {
+    background-color: #ecf5ff;
+    color: #4a89dc;
+    border: 1px solid #d9ecff;
+    padding: 5px 10px;
+    border-radius: 4px;
+    font-size: 0.8rem;
+    cursor: pointer;
+    transition: all 0.3s ease;
+}
+
+.renew-btn:hover {
+    background-color: #4a89dc;
+    color: white;
+    border-color: #4a89dc;
+}
+
+/* 热门图书区域 */
+.popular-section {
+    margin-top: 20px;
+}
+
+.popular-books {
+    display: flex;
+    overflow-x: auto;
+    gap: 15px;
+    padding-bottom: 10px;
+}
+
+.popular-book-item {
+    display: flex;
+    background-color: #f8fafc;
+    border-radius: 8px;
+    padding: 15px;
+    min-width: 280px;
+    position: relative;
+}
+
+.rank-badge {
+    position: absolute;
+    top: -10px;
+    left: 10px;
+    background-color: #4a89dc;
+    color: white;
+    width: 24px;
+    height: 24px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    border-radius: 50%;
+    font-size: 0.8rem;
+    font-weight: bold;
+}
+
+.book-cover.small {
+    width: 60px;
+    height: 90px;
+    min-width: 60px;
+    margin-right: 15px;
+}
+
+.book-details {
+    flex: 1;
+}
+
+.book-stats {
+    display: flex;
+    flex-direction: column;
+    gap: 5px;
+    margin-top: 10px;
+}
+
+.book-stats span {
+    font-size: 0.8rem;
+    color: #8492a6;
+}
+
+.book-stats i {
+    margin-right: 5px;
+}
+
+/* 响应式调整 */
+@media (max-width: 1200px) {
+    .stats-container {
+        grid-template-columns: repeat(2, 1fr);
+    }
+
+    .main-sections {
+        grid-template-columns: 1fr;
+    }
+}
+
+@media (max-width: 768px) {
+    .sidebar {
+        width: 70px;
+        overflow: hidden;
+    }
+
+    .logo-container {
+        padding: 10px;
+    }
+
+    .logo-container h2 {
+        display: none;
+    }
+
+    .nav-links li a span {
+        display: none;
+    }
+
+    .nav-links li a i {
+        margin-right: 0;
+    }
+
+    .nav-category {
+        display: none;
+    }
+
+    .main-content {
+        margin-left: 70px;
+    }
+
+    .search-container {
+        width: 180px;
+    }
+
+    .book-grid {
+        grid-template-columns: 1fr;
+    }
+}
+
+@media (max-width: 576px) {
+    .stats-container {
+        grid-template-columns: 1fr;
+    }
+
+    .top-bar {
+        flex-direction: column;
+        gap: 15px;
+    }
+
+    .search-container {
+        width: 100%;
+    }
+
+    .user-details {
+        display: none;
+    }
+}
+================================================================================
+File: ./app/static/css/main.css
+================================================================================
+
+/* 主样式文件 - 从登录页面复制过来的样式 */
+/* 从您提供的登录页CSS复制，但省略了不需要的部分 */
+* {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
+}
+
+:root {
+    --primary-color: #4a89dc;
+    --primary-hover: #3b78c4;
+    --secondary-color: #5cb85c;
+    --text-color: #333;
+    --light-text: #666;
+    --bg-color: #f5f7fa;
+    --card-bg: #ffffff;
+    --border-color: #ddd;
+    --error-color: #e74c3c;
+    --success-color: #2ecc71;
+}
+
+body.dark-mode {
+    --primary-color: #5a9aed;
+    --primary-hover: #4a89dc;
+    --secondary-color: #6bc76b;
+    --text-color: #f1f1f1;
+    --light-text: #aaa;
+    --bg-color: #1a1a1a;
+    --card-bg: #2c2c2c;
+    --border-color: #444;
+}
+
+body {
+    background-color: var(--bg-color);
+    background-image: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
+    background-size: cover;
+    background-position: center;
+    display: flex;
+    flex-direction: column;
+    min-height: 100vh;
+    color: var(--text-color);
+    transition: all 0.3s ease;
+}
+
+.theme-toggle {
+    position: absolute;
+    top: 20px;
+    right: 20px;
+    z-index: 10;
+    cursor: pointer;
+    padding: 8px;
+    border-radius: 50%;
+    background-color: rgba(255, 255, 255, 0.2);
+    backdrop-filter: blur(5px);
+    border: 1px solid rgba(255, 255, 255, 0.1);
+}
+
+.overlay {
+    background-color: rgba(0, 0, 0, 0.4);
+    backdrop-filter: blur(5px);
+    position: fixed;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    z-index: -1;
+}
+
+.main-container {
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    flex: 1;
+    padding: 20px;
+}
+
+.login-container {
+    background-color: var(--card-bg);
+    border-radius: 12px;
+    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
+    width: 450px;
+    padding: 35px;
+    position: relative;
+    overflow: hidden;
+    animation: fadeIn 0.5s ease;
+}
+
+@keyframes fadeIn {
+    from { opacity: 0; transform: translateY(20px); }
+    to { opacity: 1; transform: translateY(0); }
+}
+
+.logo {
+    text-align: center;
+    margin-bottom: 25px;
+    position: relative;
+}
+
+.logo img {
+    width: 90px;
+    height: 90px;
+    border-radius: 12px;
+    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
+    padding: 5px;
+    background-color: #fff;
+    transition: transform 0.3s ease;
+}
+
+h1 {
+    text-align: center;
+    color: var(--text-color);
+    margin-bottom: 10px;
+    font-weight: 600;
+    font-size: 28px;
+}
+
+.subtitle {
+    text-align: center;
+    color: var(--light-text);
+    margin-bottom: 30px;
+    font-size: 14px;
+}
+
+.form-group {
+    margin-bottom: 22px;
+    position: relative;
+}
+
+.form-group label {
+    display: block;
+    margin-bottom: 8px;
+    color: var(--text-color);
+    font-weight: 500;
+    font-size: 14px;
+}
+
+.input-with-icon {
+    position: relative;
+}
+
+.input-icon {
+    position: absolute;
+    left: 15px;
+    top: 50%;
+    transform: translateY(-50%);
+    color: var(--light-text);
+}
+
+.form-control {
+    width: 100%;
+    height: 48px;
+    border: 1px solid var(--border-color);
+    border-radius: 6px;
+    padding: 0 15px 0 45px;
+    font-size: 15px;
+    transition: all 0.3s ease;
+    background-color: var(--card-bg);
+    color: var(--text-color);
+}
+
+.form-control:focus {
+    border-color: var(--primary-color);
+    box-shadow: 0 0 0 3px rgba(74, 137, 220, 0.2);
+    outline: none;
+}
+
+.password-toggle {
+    position: absolute;
+    right: 15px;
+    top: 50%;
+    transform: translateY(-50%);
+    cursor: pointer;
+    color: var(--light-text);
+}
+
+.validation-message {
+    margin-top: 6px;
+    font-size: 12px;
+    color: var(--error-color);
+    display: none;
+}
+
+.validation-message.show {
+    display: block;
+    animation: shake 0.5s ease;
+}
+
+@keyframes shake {
+    0%, 100% { transform: translateX(0); }
+    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
+    20%, 40%, 60%, 80% { transform: translateX(5px); }
+}
+
+.remember-forgot {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    margin-bottom: 25px;
+}
+
+.custom-checkbox {
+    position: relative;
+    padding-left: 30px;
+    cursor: pointer;
+    font-size: 14px;
+    user-select: none;
+    color: var(--light-text);
+}
+
+.custom-checkbox input {
+    position: absolute;
+    opacity: 0;
+    cursor: pointer;
+    height: 0;
+    width: 0;
+}
+
+.checkmark {
+    position: absolute;
+    top: 0;
+    left: 0;
+    height: 18px;
+    width: 18px;
+    background-color: var(--card-bg);
+    border: 1px solid var(--border-color);
+    border-radius: 3px;
+    transition: all 0.2s ease;
+}
+
+.custom-checkbox:hover input ~ .checkmark {
+    border-color: var(--primary-color);
+}
+
+.custom-checkbox input:checked ~ .checkmark {
+    background-color: var(--primary-color);
+    border-color: var(--primary-color);
+}
+
+.checkmark:after {
+    content: "";
+    position: absolute;
+    display: none;
+}
+
+.custom-checkbox input:checked ~ .checkmark:after {
+    display: block;
+}
+
+.custom-checkbox .checkmark:after {
+    left: 6px;
+    top: 2px;
+    width: 4px;
+    height: 9px;
+    border: solid white;
+    border-width: 0 2px 2px 0;
+    transform: rotate(45deg);
+}
+
+.forgot-password a {
+    color: var(--primary-color);
+    text-decoration: none;
+    font-size: 14px;
+    transition: color 0.3s ease;
+}
+
+.forgot-password a:hover {
+    color: var(--primary-hover);
+    text-decoration: underline;
+}
+
+.btn-login {
+    width: 100%;
+    height: 48px;
+    background-color: var(--primary-color);
+    color: white;
+    border: none;
+    border-radius: 6px;
+    font-size: 16px;
+    font-weight: 600;
+    cursor: pointer;
+    transition: all 0.3s ease;
+    position: relative;
+    overflow: hidden;
+}
+
+.btn-login:hover {
+    background-color: var(--primary-hover);
+}
+
+.btn-login:active {
+    transform: scale(0.98);
+}
+
+.btn-login .loading {
+    display: none;
+    position: absolute;
+    top: 50%;
+    left: 50%;
+    transform: translate(-50%, -50%);
+}
+
+.btn-login.loading-state {
+    color: transparent;
+}
+
+.btn-login.loading-state .loading {
+    display: block;
+}
+
+.signup {
+    text-align: center;
+    margin-top: 25px;
+    font-size: 14px;
+    color: var(--light-text);
+}
+
+.signup a {
+    color: var(--primary-color);
+    text-decoration: none;
+    font-weight: 600;
+    transition: color 0.3s ease;
+}
+
+.signup a:hover {
+    color: var(--primary-hover);
+    text-decoration: underline;
+}
+
+.features {
+    display: flex;
+    justify-content: center;
+    margin-top: 25px;
+    gap: 30px;
+}
+
+.feature-item {
+    text-align: center;
+    font-size: 12px;
+    color: var(--light-text);
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+}
+
+.feature-icon {
+    margin-bottom: 5px;
+    font-size: 18px;
+}
+
+footer {
+    text-align: center;
+    padding: 20px;
+    color: rgba(255, 255, 255, 0.7);
+    font-size: 12px;
+}
+
+footer a {
+    color: rgba(255, 255, 255, 0.9);
+    text-decoration: none;
+}
+
+.alert {
+    padding: 10px;
+    margin-bottom: 15px;
+    border-radius: 4px;
+    color: #721c24;
+    background-color: #f8d7da;
+    border: 1px solid #f5c6cb;
+}
+
+.verification-code-container {
+    display: flex;
+    gap: 10px;
+}
+
+.verification-input {
+    flex: 1;
+    height: 48px;
+    border: 1px solid var(--border-color);
+    border-radius: 6px;
+    padding: 0 15px;
+    font-size: 15px;
+}
+
+.send-code-btn {
+    padding: 0 15px;
+    background-color: var(--primary-color);
+    color: white;
+    border: none;
+    border-radius: 6px;
+    cursor: pointer;
+    white-space: nowrap;
+}
+
+.register-container {
+    width: 500px;
+}
+
+@media (max-width: 576px) {
+    .login-container {
+        width: 100%;
+        padding: 25px;
+        border-radius: 0;
+    }
+
+    .theme-toggle {
+        top: 10px;
+    }
+
+    .logo img {
+        width: 70px;
+        height: 70px;
+    }
+
+    h1 {
+        font-size: 22px;
+    }
+
+    .main-container {
+        padding: 0;
+    }
+
+    .verification-code-container {
+        flex-direction: column;
+    }
+
+    .register-container {
+        width: 100%;
+    }
+}
+
+.verification-code-container {
+    display: flex;
+    gap: 10px;
+}
+
+.verification-input {
+    flex: 1;
+    height: 48px;
+    border: 1px solid var(--border-color);
+    border-radius: 6px;
+    padding: 0 15px;
+    font-size: 15px;
+    transition: all 0.3s ease;
+    background-color: var(--card-bg);
+    color: var(--text-color);
+}
+
+.send-code-btn {
+    padding: 0 15px;
+    background-color: var(--primary-color);
+    color: white;
+    border: none;
+    border-radius: 6px;
+    cursor: pointer;
+    font-size: 14px;
+    white-space: nowrap;
+    transition: all 0.3s ease;
+}
+
+.send-code-btn:hover {
+    background-color: var(--primary-hover);
+}
+
+.send-code-btn:disabled {
+    background-color: #ccc;
+    cursor: not-allowed;
+}
+
+================================================================================
+File: ./app/static/js/main.js
+================================================================================
+
+// 主JS文件 - 包含登录和注册功能
+document.addEventListener('DOMContentLoaded', function() {
+    // 主题切换
+    const themeToggle = document.getElementById('theme-toggle');
+    if (themeToggle) {
+        const body = document.body;
+
+        themeToggle.addEventListener('click', function() {
+            body.classList.toggle('dark-mode');
+            const isDarkMode = body.classList.contains('dark-mode');
+            localStorage.setItem('dark-mode', isDarkMode);
+            themeToggle.innerHTML = isDarkMode ? '🌙' : '☀️';
+        });
+
+        // 从本地存储中加载主题首选项
+        const savedDarkMode = localStorage.getItem('dark-mode') === 'true';
+        if (savedDarkMode) {
+            body.classList.add('dark-mode');
+            themeToggle.innerHTML = '🌙';
+        }
+    }
+
+    // 密码可见性切换
+    const passwordToggle = document.getElementById('password-toggle');
+    if (passwordToggle) {
+        const passwordInput = document.getElementById('password');
+        passwordToggle.addEventListener('click', function() {
+            const type = passwordInput.getAttribute('type') === 'password' ? 'text' : 'password';
+            passwordInput.setAttribute('type', type);
+            passwordToggle.innerHTML = type === 'password' ? '👁️' : '👁️‍🗨️';
+        });
+    }
+
+    // 登录表单验证
+    const loginForm = document.getElementById('login-form');
+    if (loginForm) {
+        const usernameInput = document.getElementById('username');
+        const passwordInput = document.getElementById('password');
+        const usernameError = document.getElementById('username-error');
+        const passwordError = document.getElementById('password-error');
+        const loginButton = document.getElementById('login-button');
+
+        if (usernameInput && usernameError) {
+            usernameInput.addEventListener('input', function() {
+                if (usernameInput.value.trim() === '') {
+                    usernameError.textContent = '用户名不能为空';
+                    usernameError.classList.add('show');
+                } else {
+                    usernameError.classList.remove('show');
+                }
+            });
+        }
+
+        if (passwordInput && passwordError) {
+            passwordInput.addEventListener('input', function() {
+                if (passwordInput.value.trim() === '') {
+                    passwordError.textContent = '密码不能为空';
+                    passwordError.classList.add('show');
+                } else if (passwordInput.value.length < 6) {
+                    passwordError.textContent = '密码长度至少6位';
+                    passwordError.classList.add('show');
+                } else {
+                    passwordError.classList.remove('show');
+                }
+            });
+        }
+
+        loginForm.addEventListener('submit', function(e) {
+            let isValid = true;
+
+            // 验证用户名
+            if (usernameInput.value.trim() === '') {
+                usernameError.textContent = '用户名不能为空';
+                usernameError.classList.add('show');
+                isValid = false;
+            }
+
+            // 验证密码
+            if (passwordInput.value.trim() === '') {
+                passwordError.textContent = '密码不能为空';
+                passwordError.classList.add('show');
+                isValid = false;
+            } else if (passwordInput.value.length < 6) {
+                passwordError.textContent = '密码长度至少6位';
+                passwordError.classList.add('show');
+                isValid = false;
+            }
+
+            if (!isValid) {
+                e.preventDefault();
+            } else if (loginButton) {
+                loginButton.classList.add('loading-state');
+            }
+        });
+    }
+    // 注册表单验证
+    const registerForm = document.getElementById('register-form');
+    if (registerForm) {
+        const usernameInput = document.getElementById('username');
+        const emailInput = document.getElementById('email');
+        const passwordInput = document.getElementById('password');
+        const confirmPasswordInput = document.getElementById('confirm_password');
+        const verificationCodeInput = document.getElementById('verification_code');
+
+        const usernameError = document.getElementById('username-error');
+        const emailError = document.getElementById('email-error');
+        const passwordError = document.getElementById('password-error');
+        const confirmPasswordError = document.getElementById('confirm-password-error');
+        const verificationCodeError = document.getElementById('verification-code-error');
+
+        const registerButton = document.getElementById('register-button');
+        const sendCodeBtn = document.getElementById('send-code-btn');
+
+        // 用户名验证
+        if (usernameInput && usernameError) {
+            usernameInput.addEventListener('input', function() {
+                if (usernameInput.value.trim() === '') {
+                    usernameError.textContent = '用户名不能为空';
+                    usernameError.classList.add('show');
+                } else if (usernameInput.value.length < 3) {
+                    usernameError.textContent = '用户名至少3个字符';
+                    usernameError.classList.add('show');
+                } else {
+                    usernameError.classList.remove('show');
+                }
+            });
+        }
+
+        // 邮箱验证
+        if (emailInput && emailError) {
+            emailInput.addEventListener('input', function() {
+                const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+                if (emailInput.value.trim() === '') {
+                    emailError.textContent = '邮箱不能为空';
+                    emailError.classList.add('show');
+                } else if (!emailRegex.test(emailInput.value)) {
+                    emailError.textContent = '请输入有效的邮箱地址';
+                    emailError.classList.add('show');
+                } else {
+                    emailError.classList.remove('show');
+                }
+            });
+        }
+
+        // 密码验证
+        if (passwordInput && passwordError) {
+            passwordInput.addEventListener('input', function() {
+                if (passwordInput.value.trim() === '') {
+                    passwordError.textContent = '密码不能为空';
+                    passwordError.classList.add('show');
+                } else if (passwordInput.value.length < 6) {
+                    passwordError.textContent = '密码长度至少6位';
+                    passwordError.classList.add('show');
+                } else {
+                    passwordError.classList.remove('show');
+                }
+
+                // 检查确认密码是否匹配
+                if (confirmPasswordInput && confirmPasswordInput.value) {
+                    if (confirmPasswordInput.value !== passwordInput.value) {
+                        confirmPasswordError.textContent = '两次输入的密码不匹配';
+                        confirmPasswordError.classList.add('show');
+                    } else {
+                        confirmPasswordError.classList.remove('show');
+                    }
+                }
+            });
+        }
+
+        // 确认密码验证
+        if (confirmPasswordInput && confirmPasswordError) {
+            confirmPasswordInput.addEventListener('input', function() {
+                if (confirmPasswordInput.value.trim() === '') {
+                    confirmPasswordError.textContent = '请确认密码';
+                    confirmPasswordError.classList.add('show');
+                } else if (confirmPasswordInput.value !== passwordInput.value) {
+                    confirmPasswordError.textContent = '两次输入的密码不匹配';
+                    confirmPasswordError.classList.add('show');
+                } else {
+                    confirmPasswordError.classList.remove('show');
+                }
+            });
+        }
+
+        // 发送验证码按钮
+        if (sendCodeBtn) {
+            sendCodeBtn.addEventListener('click', function() {
+                const email = emailInput.value.trim();
+                const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+
+                if (!email) {
+                    emailError.textContent = '请输入邮箱地址';
+                    emailError.classList.add('show');
+                    return;
+                } else if (!emailRegex.test(email)) {
+                    emailError.textContent = '请输入有效的邮箱地址';
+                    emailError.classList.add('show');
+                    return;
+                }
+
+                // 禁用按钮并显示倒计时
+                let countdown = 60;
+                sendCodeBtn.disabled = true;
+                const originalText = sendCodeBtn.textContent;
+                sendCodeBtn.textContent = `${countdown}秒后重试`;
+
+                const timer = setInterval(() => {
+                    countdown--;
+                    sendCodeBtn.textContent = `${countdown}秒后重试`;
+
+                    if (countdown <= 0) {
+                        clearInterval(timer);
+                        sendCodeBtn.disabled = false;
+                        sendCodeBtn.textContent = originalText;
+                    }
+                }, 1000);
+
+                // 发送请求获取验证码
+                fetch('/user/send_verification_code', {
+                    method: 'POST',
+                    headers: {
+                        'Content-Type': 'application/json',
+                    },
+                    body: JSON.stringify({ email: email }),
+                })
+                .then(response => response.json())
+                .then(data => {
+                    console.log("验证码发送响应:", data);  // 添加调试日志
+                    if (data.success) {
+                        showMessage('验证码已发送', '请检查您的邮箱', 'success');
+                    } else {
+                        showMessage('发送失败', data.message || '请稍后重试', 'error');
+                        clearInterval(timer);
+                        sendCodeBtn.disabled = false;
+                        sendCodeBtn.textContent = originalText;
+                    }
+                })
+                .catch(error => {
+                    console.error('Error:', error);
+                    showMessage('发送失败', '网络错误，请稍后重试', 'error');
+                    clearInterval(timer);
+                    sendCodeBtn.disabled = false;
+                    sendCodeBtn.textContent = originalText;
+                });
+            });
+        }
+
+        // 表单提交验证
+        registerForm.addEventListener('submit', function(e) {
+            let isValid = true;
+
+            // 验证用户名
+            if (usernameInput.value.trim() === '') {
+                usernameError.textContent = '用户名不能为空';
+                usernameError.classList.add('show');
+                isValid = false;
+            } else if (usernameInput.value.length < 3) {
+                usernameError.textContent = '用户名至少3个字符';
+                usernameError.classList.add('show');
+                isValid = false;
+            }
+
+            // 验证邮箱
+            const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+            if (emailInput.value.trim() === '') {
+                emailError.textContent = '邮箱不能为空';
+                emailError.classList.add('show');
+                isValid = false;
+            } else if (!emailRegex.test(emailInput.value)) {
+                emailError.textContent = '请输入有效的邮箱地址';
+                emailError.classList.add('show');
+                isValid = false;
+            }
+
+            // 验证密码
+            if (passwordInput.value.trim() === '') {
+                passwordError.textContent = '密码不能为空';
+                passwordError.classList.add('show');
+                isValid = false;
+            } else if (passwordInput.value.length < 6) {
+                passwordError.textContent = '密码长度至少6位';
+                passwordError.classList.add('show');
+                isValid = false;
+            }
+
+            // 验证确认密码
+            if (confirmPasswordInput.value.trim() === '') {
+                confirmPasswordError.textContent = '请确认密码';
+                confirmPasswordError.classList.add('show');
+                isValid = false;
+            } else if (confirmPasswordInput.value !== passwordInput.value) {
+                confirmPasswordError.textContent = '两次输入的密码不匹配';
+                confirmPasswordError.classList.add('show');
+                isValid = false;
+            }
+
+            // 验证验证码
+            if (verificationCodeInput.value.trim() === '') {
+                verificationCodeError.textContent = '请输入验证码';
+                verificationCodeError.classList.add('show');
+                isValid = false;
+            }
+
+            if (!isValid) {
+                e.preventDefault();
+            } else if (registerButton) {
+                registerButton.classList.add('loading-state');
+            }
+        });
+    }
+
+    // 通知消息显示函数
+    function showMessage(title, message, type) {
+        const notification = document.createElement('div');
+        notification.className = `notification ${type}`;
+
+        const icon = type === 'success' ? '✓' : '✗';
+
+        notification.innerHTML = `
+            <div class="notification-icon">${icon}</div>
+            <div class="notification-content">
+                <h3>${title}</h3>
+                <p>${message}</p>
+            </div>
+        `;
+
+        document.body.appendChild(notification);
+
+        setTimeout(() => {
+            notification.classList.add('show');
+        }, 10);
+
+        setTimeout(() => {
+            notification.classList.remove('show');
+            setTimeout(() => {
+                document.body.removeChild(notification);
+            }, 300);
+        }, 3000);
+    }
+});
+================================================================================
+File: ./app/templates/index.html
+================================================================================
+
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>首页 - 图书管理系统</title>
+    <!-- 只引用index页面的专用样式 -->
+    <link rel="stylesheet" href="{{ url_for('static', filename='css/index.css') }}">
+    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
+</head>
+<body>
+    <div class="app-container">
+        <!-- 侧边导航栏 -->
+        <nav class="sidebar">
+            <div class="logo-container">
+                <img src="{{ url_for('static', filename='images/logo.png') }}" alt="Logo" class="logo">
+                <h2>图书管理系统</h2>
+            </div>
+            <ul class="nav-links">
+                <li class="active"><a href="#"><i class="fas fa-home"></i> 首页</a></li>
+                <li><a href="#"><i class="fas fa-book"></i> 图书浏览</a></li>
+                <li><a href="#"><i class="fas fa-bookmark"></i> 我的借阅</a></li>
+                <li><a href="#"><i class="fas fa-bell"></i> 通知公告</a></li>
+                {% if current_user.role_id == 1 %}
+                <li class="nav-category">管理功能</li>
+                <li><a href="#"><i class="fas fa-users"></i> 用户管理</a></li>
+                <li><a href="#"><i class="fas fa-layer-group"></i> 图书管理</a></li>
+                <li><a href="#"><i class="fas fa-exchange-alt"></i> 借阅管理</a></li>
+                <li><a href="#"><i class="fas fa-warehouse"></i> 库存管理</a></li>
+                <li><a href="#"><i class="fas fa-chart-bar"></i> 统计分析</a></li>
+                <li><a href="#"><i class="fas fa-history"></i> 日志管理</a></li>
+                {% endif %}
+            </ul>
+        </nav>
+
+        <!-- 主内容区 -->
+        <main class="main-content">
+            <!-- 顶部导航 -->
+            <header class="top-bar">
+                <div class="search-container">
+                    <i class="fas fa-search search-icon"></i>
+                    <input type="text" placeholder="搜索图书..." class="search-input">
+                </div>
+                <div class="user-menu">
+                    <div class="notifications">
+                        <i class="fas fa-bell"></i>
+                        <span class="badge">3</span>
+                    </div>
+                    <div class="user-info">
+                        <div class="user-avatar">
+                            {{ current_user.username[0] }}
+                        </div>
+                        <div class="user-details">
+                            <span class="user-name">{{ current_user.username }}</span>
+                            <span class="user-role">{{ '管理员' if current_user.role_id == 1 else '普通用户' }}</span>
+                        </div>
+                        <div class="dropdown-menu">
+                            <a href="#"><i class="fas fa-user-circle"></i> 个人中心</a>
+                            <a href="#"><i class="fas fa-cog"></i> 设置</a>
+                            <a href="{{ url_for('user.logout') }}"><i class="fas fa-sign-out-alt"></i> 退出登录</a>
+                        </div>
+                    </div>
+                </div>
+            </header>
+
+            <!-- 欢迎区域 -->
+            <div class="welcome-section">
+                <h1>欢迎回来，{{ current_user.username }}！</h1>
+                <p>今天是 <span id="current-date"></span>，祝您使用愉快。</p>
+            </div>
+
+            <!-- 快速统计 -->
+            <div class="stats-container">
+                <div class="stat-card">
+                    <i class="fas fa-book stat-icon"></i>
+                    <div class="stat-info">
+                        <h3>馆藏总量</h3>
+                        <p class="stat-number">8,567</p>
+                    </div>
+                </div>
+                <div class="stat-card">
+                    <i class="fas fa-users stat-icon"></i>
+                    <div class="stat-info">
+                        <h3>注册用户</h3>
+                        <p class="stat-number">1,245</p>
+                    </div>
+                </div>
+                <div class="stat-card">
+                    <i class="fas fa-exchange-alt stat-icon"></i>
+                    <div class="stat-info">
+                        <h3>当前借阅</h3>
+                        <p class="stat-number">352</p>
+                    </div>
+                </div>
+                <div class="stat-card">
+                    <i class="fas fa-clock stat-icon"></i>
+                    <div class="stat-info">
+                        <h3>待还图书</h3>
+                        <p class="stat-number">{{ 5 }}</p>
+                    </div>
+                </div>
+            </div>
+
+            <!-- 主要内容区 -->
+            <div class="main-sections">
+                <!-- 最新图书 -->
+                <div class="content-section book-section">
+                    <div class="section-header">
+                        <h2>最新图书</h2>
+                        <a href="#" class="view-all">查看全部 <i class="fas fa-arrow-right"></i></a>
+                    </div>
+                    <div class="book-grid">
+                        {% for i in range(4) %}
+                        <div class="book-card">
+                            <div class="book-cover">
+                                <img src="{{ url_for('static', filename='images/book-placeholder.jpg') }}" alt="Book Cover" onerror="this.src='https://via.placeholder.com/150x210?text=No+Cover'">
+                            </div>
+                            <div class="book-info">
+                                <h3 class="book-title">示例图书标题</h3>
+                                <p class="book-author">作者名</p>
+                                <div class="book-meta">
+                                    <span class="book-category">计算机</span>
+                                    <span class="book-status available">可借阅</span>
+                                </div>
+                                <button class="borrow-btn">借阅</button>
+                            </div>
+                        </div>
+                        {% endfor %}
+                    </div>
+                </div>
+
+                <!-- 通知公告 -->
+                <div class="content-section notice-section">
+                    <div class="section-header">
+                        <h2>通知公告</h2>
+                        <a href="#" class="view-all">查看全部 <i class="fas fa-arrow-right"></i></a>
+                    </div>
+                    <div class="notice-list">
+                        <div class="notice-item">
+                            <div class="notice-icon"><i class="fas fa-bullhorn"></i></div>
+                            <div class="notice-content">
+                                <h3>关于五一假期图书馆开放时间调整的通知</h3>
+                                <p>五一期间(5月1日-5日)，图书馆开放时间调整为上午9:00-下午5:00。</p>
+                                <div class="notice-meta">
+                                    <span class="notice-time">2023-04-28</span>
+                                </div>
+                            </div>
+                        </div>
+                        <div class="notice-item">
+                            <div class="notice-icon"><i class="fas fa-bell"></i></div>
+                            <div class="notice-content">
+                                <h3>您有2本图书即将到期</h3>
+                                <p>《Python编程》《算法导论》将于3天后到期，请及时归还或办理续借。</p>
+                                <div class="notice-meta">
+                                    <span class="notice-time">2023-04-27</span>
+                                    <button class="renew-btn">一键续借</button>
+                                </div>
+                            </div>
+                        </div>
+                    </div>
+                </div>
+            </div>
+
+            <!-- 热门图书区域 -->
+            <div class="content-section popular-section">
+                <div class="section-header">
+                    <h2>热门图书</h2>
+                    <a href="#" class="view-all">查看全部 <i class="fas fa-arrow-right"></i></a>
+                </div>
+                <div class="popular-books">
+                    {% for i in range(5) %}
+                    <div class="popular-book-item">
+                        <div class="rank-badge">{{ i+1 }}</div>
+                        <div class="book-cover small">
+                            <img src="https://via.placeholder.com/80x120?text=Book" alt="Book Cover">
+                        </div>
+                        <div class="book-details">
+                            <h3 class="book-title">热门图书标题示例</h3>
+                            <p class="book-author">知名作者</p>
+                            <div class="book-stats">
+                                <span><i class="fas fa-eye"></i> 1024 次浏览</span>
+                                <span><i class="fas fa-bookmark"></i> 89 次借阅</span>
+                            </div>
+                        </div>
+                    </div>
+                    {% endfor %}
+                </div>
+            </div>
+        </main>
+    </div>
+
+    <script>
+        document.addEventListener('DOMContentLoaded', function() {
+            // 设置当前日期
+            const now = new Date();
+            const options = { year: 'numeric', month: 'long', day: 'numeric', weekday: 'long' };
+            document.getElementById('current-date').textContent = now.toLocaleDateString('zh-CN', options);
+
+            // 用户菜单下拉
+            const userInfo = document.querySelector('.user-info');
+            userInfo.addEventListener('click', function(e) {
+                userInfo.classList.toggle('active');
+            });
+
+            // 点击其他区域关闭下拉菜单
+            document.addEventListener('click', function(e) {
+                if (!userInfo.contains(e.target)) {
+                    userInfo.classList.remove('active');
+                }
+            });
+        });
+    </script>
+</body>
+</html>
+================================================================================
+File: ./app/templates/base.html
+================================================================================
+
+
+================================================================================
+File: ./app/templates/register.html
+================================================================================
+
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>用户注册 - 图书管理系统</title>
+    <link rel="stylesheet" href="{{ url_for('static', filename='css/main.css') }}">
+</head>
+<body>
+    <div class="overlay"></div>
+
+    <div class="theme-toggle" id="theme-toggle">☀️</div>
+
+    <div class="main-container">
+        <div class="login-container register-container">
+            <div class="logo">
+                <img src="{{ url_for('static', filename='images/logo.png') }}" alt="Logo">
+            </div>
+            <h1>图书管理系统</h1>
+            <p class="subtitle">创建您的新账户</p>
+
+            <div id="register-form-container">
+                <form id="register-form" action="{{ url_for('user.register') }}" method="post">
+                    <div class="form-group">
+                        <label for="username">用户名</label>
+                        <div class="input-with-icon">
+                            <span class="input-icon">👤</span>
+                            <input type="text" id="username" name="username" class="form-control" placeholder="请输入用户名" required>
+                        </div>
+                        <div class="validation-message" id="username-error"></div>
+                    </div>
+
+                    <div class="form-group">
+                        <label for="email">邮箱</label>
+                        <div class="input-with-icon">
+                            <span class="input-icon">📧</span>
+                            <input type="email" id="email" name="email" class="form-control" placeholder="请输入邮箱" required>
+                        </div>
+                        <div class="validation-message" id="email-error"></div>
+                    </div>
+
+                    <div class="form-group">
+                        <label for="verification_code">邮箱验证码</label>
+                        <div class="verification-code-container">
+                            <input type="text" id="verification_code" name="verification_code" class="verification-input" placeholder="请输入验证码" required>
+                            <button type="button" id="send-code-btn" class="send-code-btn">发送验证码</button>
+                        </div>
+                        <div class="validation-message" id="verification-code-error"></div>
+                    </div>
+
+                    <div class="form-group">
+                        <label for="password">密码</label>
+                        <div class="input-with-icon">
+                            <span class="input-icon">🔒</span>
+                            <input type="password" id="password" name="password" class="form-control" placeholder="请设置密码" required>
+                            <span class="password-toggle" id="password-toggle">👁️</span>
+                        </div>
+                        <div class="validation-message" id="password-error"></div>
+                    </div>
+
+                    <div class="form-group">
+                        <label for="confirm_password">确认密码</label>
+                        <div class="input-with-icon">
+                            <span class="input-icon">🔒</span>
+                            <input type="password" id="confirm_password" name="confirm_password" class="form-control" placeholder="请再次输入密码" required>
+                        </div>
+                        <div class="validation-message" id="confirm-password-error"></div>
+                    </div>
+
+                    {% if error %}
+                    <div class="alert alert-danger">{{ error }}</div>
+                    {% endif %}
+
+                    <button type="submit" class="btn-login" id="register-button">
+                        <span>注册</span>
+                        <span class="loading">⟳</span>
+                    </button>
+                </form>
+
+                <div class="signup">
+                    已有账号？ <a href="{{ url_for('user.login') }}">返回登录</a>
+                </div>
+            </div>
+        </div>
+    </div>
+
+    <footer>
+        <p>© 2025 图书管理系统 - 版权所有</p>
+    </footer>
+
+    <script src="{{ url_for('static', filename='js/main.js') }}"></script>
+</body>
+</html>
+================================================================================
+File: ./app/templates/404.html
+================================================================================
+
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>页面未找到 - 图书管理系统</title>
+    <link rel="stylesheet" href="{{ url_for('static', filename='css/main.css') }}">
+    <style>
+        .error-container {
+            text-align: center;
+            padding: 50px 20px;
+        }
+        .error-code {
+            font-size: 100px;
+            font-weight: bold;
+            color: #4a89dc;
+            margin-bottom: 20px;
+        }
+        .error-message {
+            font-size: 24px;
+            color: #333;
+            margin-bottom: 30px;
+        }
+        .back-button {
+            display: inline-block;
+            padding: 10px 20px;
+            background-color: #4a89dc;
+            color: white;
+            text-decoration: none;
+            border-radius: 5px;
+            font-weight: 500;
+        }
+        .back-button:hover {
+            background-color: #3b78c4;
+        }
+    </style>
+</head>
+<body>
+    <div class="main-container">
+        <div class="error-container">
+            <div class="error-code">404</div>
+            <div class="error-message">页面未找到</div>
+            <p>抱歉，您访问的页面不存在或已被移除。</p>
+            <p style="margin-bottom: 30px;">请检查URL是否正确，或返回首页。</p>
+            <a href="{{ url_for('index') }}" class="back-button">返回首页</a>
+        </div>
+    </div>
+</body>
+</html>
+
+================================================================================
+File: ./app/templates/login.html
+================================================================================
+
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>用户登录 - 图书管理系统</title>
+    <link rel="stylesheet" href="{{ url_for('static', filename='css/main.css') }}">
+</head>
+<body>
+    <div class="overlay"></div>
+
+    <div class="theme-toggle" id="theme-toggle">☀️</div>
+
+    <div class="main-container">
+        <div class="login-container">
+            <div class="logo">
+                <img src="{{ url_for('static', filename='images/logo.png') }}" alt="Logo">
+            </div>
+            <h1>图书管理系统</h1>
+            <p class="subtitle">欢迎回来，请登录您的账户</p>
+
+            <div id="account-login">
+                <form id="login-form" action="{{ url_for('user.login') }}" method="post">
+                    <div class="form-group">
+                        <label for="username">用户名/邮箱</label>
+                        <div class="input-with-icon">
+                            <span class="input-icon">👤</span>
+                            <input type="text" id="username" name="username" class="form-control" placeholder="请输入账号">
+                        </div>
+                        <div class="validation-message" id="username-error"></div>
+                    </div>
+
+                    <div class="form-group">
+                        <label for="password">密码</label>
+                        <div class="input-with-icon">
+                            <span class="input-icon">🔒</span>
+                            <input type="password" id="password" name="password" class="form-control" placeholder="请输入密码">
+                            <span class="password-toggle" id="password-toggle">👁️</span>
+                        </div>
+                        <div class="validation-message" id="password-error"></div>
+                    </div>
+
+                    <div class="remember-forgot">
+                        <label class="custom-checkbox">
+                            <input type="checkbox" name="remember_me">
+                            <span class="checkmark"></span>
+                            记住我 (7天内免登录)
+                        </label>
+                        <div class="forgot-password">
+                            <a href="#">忘记密码？</a>
+                        </div>
+                    </div>
+
+                    {% if error %}
+                    <div class="alert alert-danger">{{ error }}</div>
+                    {% endif %}
+
+                    <button type="submit" class="btn-login" id="login-button">
+                        <span>登录</span>
+                        <span class="loading">⟳</span>
+                    </button>
+                </form>
+
+                <div class="signup">
+                    还没有账号？ <a href="{{ url_for('user.register') }}">立即注册</a>
+                </div>
+
+                <div class="features">
+                    <div class="feature-item">
+                        <span class="feature-icon">🔒</span>
+                        <span>安全登录</span>
+                    </div>
+                    <div class="feature-item">
+                        <span class="feature-icon">🔐</span>
+                        <span>数据加密</span>
+                    </div>
+                    <div class="feature-item">
+                        <span class="feature-icon">📚</span>
+                        <span>图书管理</span>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+
+    <footer>
+        <p>© 2025 图书管理系统 - 版权所有</p>
+    </footer>
+
+    <script src="{{ url_for('static', filename='js/main.js') }}"></script>
+</body>
+</html>
+================================================================================
+File: ./app/controllers/user.py
+================================================================================
+
+from flask import Blueprint, render_template, request, redirect, url_for, flash, session, jsonify
+from werkzeug.security import generate_password_hash, check_password_hash
+from app.models.user import User, db
+from app.utils.email import send_verification_email, generate_verification_code
+import logging
+from functools import wraps
+import time
+from datetime import datetime, timedelta
+
+# 创建蓝图
+user_bp = Blueprint('user', __name__)
+
+
+# 使用内存字典代替Redis存储验证码
+class VerificationStore:
+    def __init__(self):
+        self.codes = {}  # 存储格式: {email: {'code': code, 'expires': timestamp}}
+
+    def setex(self, email, seconds, code):
+        """设置验证码并指定过期时间"""
+        expiry = datetime.now() + timedelta(seconds=seconds)
+        self.codes[email] = {'code': code, 'expires': expiry}
+        return True
+
+    def get(self, email):
+        """获取验证码，如果过期则返回None"""
+        if email not in self.codes:
+            return None
+
+        data = self.codes[email]
+        if datetime.now() > data['expires']:
+            # 验证码已过期，删除它
+            self.delete(email)
+            return None
+
+        return data['code']
+
+    def delete(self, email):
+        """删除验证码"""
+        if email in self.codes:
+            del self.codes[email]
+        return True
+
+
+# 使用内存存储验证码
+verification_codes = VerificationStore()
+
+
+def login_required(f):
+    @wraps(f)
+    def decorated_function(*args, **kwargs):
+        if 'user_id' not in session:
+            return redirect(url_for('user.login'))
+        return f(*args, **kwargs)
+
+    return decorated_function
+
+
+@user_bp.route('/login', methods=['GET', 'POST'])
+def login():
+    # 保持原代码不变
+    if request.method == 'POST':
+        username = request.form.get('username')
+        password = request.form.get('password')
+        remember_me = request.form.get('remember_me') == 'on'
+
+        if not username or not password:
+            return render_template('login.html', error='用户名和密码不能为空')
+
+        # 检查用户是否存在
+        user = User.query.filter((User.username == username) | (User.email == username)).first()
+
+        if not user or not user.check_password(password):
+            return render_template('login.html', error='用户名或密码错误')
+
+        if user.status == 0:
+            return render_template('login.html', error='账号已被禁用，请联系管理员')
+
+        # 登录成功，保存用户信息到会话
+        session['user_id'] = user.id
+        session['username'] = user.username
+        session['role_id'] = user.role_id
+
+        if remember_me:
+            # 设置会话过期时间为7天
+            session.permanent = True
+
+        # 记录登录日志（可选）
+        # log_user_action('用户登录')
+
+        # 重定向到首页
+        return redirect(url_for('index'))
+
+    return render_template('login.html')
+
+
+@user_bp.route('/register', methods=['GET', 'POST'])
+def register():
+    if request.method == 'POST':
+        username = request.form.get('username')
+        email = request.form.get('email')
+        password = request.form.get('password')
+        confirm_password = request.form.get('confirm_password')
+        verification_code = request.form.get('verification_code')
+
+        # 验证表单数据
+        if not username or not email or not password or not confirm_password or not verification_code:
+            return render_template('register.html', error='所有字段都是必填项')
+
+        if password != confirm_password:
+            return render_template('register.html', error='两次输入的密码不匹配')
+
+        # 检查用户名和邮箱是否已存在
+        if User.query.filter_by(username=username).first():
+            return render_template('register.html', error='用户名已存在')
+
+        if User.query.filter_by(email=email).first():
+            return render_template('register.html', error='邮箱已被注册')
+
+        # 验证验证码
+        stored_code = verification_codes.get(email)
+        if not stored_code or stored_code != verification_code:
+            return render_template('register.html', error='验证码无效或已过期')
+
+        # 创建新用户
+        try:
+            new_user = User(
+                username=username,
+                password=password,  # 密码会在模型中自动哈希
+                email=email,
+                nickname=username  # 默认昵称与用户名相同
+            )
+            db.session.add(new_user)
+            db.session.commit()
+
+            # 清除验证码
+            verification_codes.delete(email)
+
+            flash('注册成功，请登录', 'success')
+            return redirect(url_for('user.login'))
+        except Exception as e:
+            db.session.rollback()
+            logging.error(f"User registration failed: {str(e)}")
+            return render_template('register.html', error='注册失败，请稍后重试')
+
+    return render_template('register.html')
+
+
+@user_bp.route('/logout')
+def logout():
+    # 清除会话数据
+    session.pop('user_id', None)
+    session.pop('username', None)
+    session.pop('role_id', None)
+    return redirect(url_for('user.login'))
+
+
+@user_bp.route('/send_verification_code', methods=['POST'])
+def send_verification_code():
+    data = request.get_json()
+    email = data.get('email')
+
+    if not email:
+        return jsonify({'success': False, 'message': '请提供邮箱地址'})
+
+    # 检查邮箱格式
+    import re
+    if not re.match(r"[^@]+@[^@]+\.[^@]+", email):
+        return jsonify({'success': False, 'message': '邮箱格式不正确'})
+
+    # 生成验证码
+    code = generate_verification_code()
+
+    # 存储验证码(10分钟有效)
+    verification_codes.setex(email, 600, code)  # 10分钟过期
+
+    # 发送验证码邮件
+    if send_verification_email(email, code):
+        return jsonify({'success': True, 'message': '验证码已发送'})
+    else:
+        return jsonify({'success': False, 'message': '邮件发送失败，请稍后重试'})
+
+================================================================================
+File: ./app/controllers/log.py
+================================================================================
+
+
+================================================================================
+File: ./app/controllers/__init__.py
+================================================================================
+
+
+================================================================================
+File: ./app/controllers/book.py
+================================================================================
+
+
+================================================================================
+File: ./app/controllers/statistics.py
+================================================================================
+
+
+================================================================================
+File: ./app/controllers/borrow.py
+================================================================================
+
+
+================================================================================
+File: ./app/controllers/announcement.py
+================================================================================
+
+
+================================================================================
+File: ./app/controllers/inventory.py
+================================================================================
+
+
+================================================================================
+File: ./app/services/borrow_service.py
+================================================================================
+
+
+================================================================================
+File: ./app/services/inventory_service.py
+================================================================================
+
+
+================================================================================
+File: ./app/services/__init__.py
+================================================================================
+
+
+================================================================================
+File: ./app/services/book_service.py
+================================================================================
+
+
+================================================================================
+File: ./app/services/user_service.py
+================================================================================
+
diff --git a/config.py b/config.py
new file mode 100644
index 0000000..9e301c2
--- /dev/null
+++ b/config.py
@@ -0,0 +1,27 @@
+import os
+
+# 数据库配置
+DB_HOST = os.environ.get('DB_HOST', '27.124.22.104')
+DB_PORT = os.environ.get('DB_PORT', '3306')
+DB_USER = os.environ.get('DB_USER', 'book20250428')
+DB_PASSWORD = os.environ.get('DB_PASSWORD', 'booksystem')
+DB_NAME = os.environ.get('DB_NAME', 'book_system')
+
+# 数据库连接字符串
+SQLALCHEMY_DATABASE_URI = f'mysql+pymysql://{DB_USER}:{DB_PASSWORD}@{DB_HOST}:{DB_PORT}/{DB_NAME}'
+SQLALCHEMY_TRACK_MODIFICATIONS = False
+
+# 应用密钥
+SECRET_KEY = os.environ.get('SECRET_KEY', 'dev_key_replace_in_production')
+
+# 邮件配置
+EMAIL_HOST = os.environ.get('EMAIL_HOST', 'smtp.qq.com')
+EMAIL_PORT = int(os.environ.get('EMAIL_PORT', 587))
+EMAIL_ENCRYPTION = os.environ.get('EMAIL_ENCRYPTION', 'starttls')
+EMAIL_USERNAME = os.environ.get('EMAIL_USERNAME', '3399560459@qq.com')
+EMAIL_PASSWORD = os.environ.get('EMAIL_PASSWORD', 'fzwhyirhbqdzcjgf')
+EMAIL_FROM = os.environ.get('EMAIL_FROM', '3399560459@qq.com')
+EMAIL_FROM_NAME = os.environ.get('EMAIL_FROM_NAME', 'BOOKSYSTEM_OFFICIAL')
+
+# 会话配置
+PERMANENT_SESSION_LIFETIME = 86400 * 7
\ No newline at end of file
diff --git a/main.py b/main.py
new file mode 100644
index 0000000..5b25c56
--- /dev/null
+++ b/main.py
@@ -0,0 +1,16 @@
+# 这是一个示例 Python 脚本。
+
+# 按 ⌃R 执行或将其替换为您的代码。
+# 按 双击 ⇧ 在所有地方搜索类、文件、工具窗口、操作和设置。
+
+
+def print_hi(name):
+    # 在下面的代码行中使用断点来调试脚本。
+    print(f'Hi, {name}')  # 按 ⌘F8 切换断点。
+
+
+# 按间距中的绿色按钮以运行脚本。
+if __name__ == '__main__':
+    print_hi('PyCharm')
+
+# 访问 https://www.jetbrains.com/help/pycharm/ 获取 PyCharm 帮助
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..89e0e90
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,6 @@
+Flask==2.3.3
+Flask-SQLAlchemy==3.1.1
+pymysql==1.1.0
+Werkzeug==2.3.7
+email-validator==2.1.0.post1
+cryptography
diff --git a/sql/book_system.sql b/sql/book_system.sql
new file mode 100644
index 0000000..10148e4
--- /dev/null
+++ b/sql/book_system.sql
@@ -0,0 +1,193 @@
+/*
+ Navicat Premium Dump SQL
+
+ Source Server         : Book_system
+ Source Server Type    : MySQL
+ Source Server Version : 80400 (8.4.0)
+ Source Host           : 27.124.22.104:3306
+ Source Schema         : book_system
+
+ Target Server Type    : MySQL
+ Target Server Version : 80400 (8.4.0)
+ File Encoding         : 65001
+
+ Date: 29/04/2025 00:41:53
+*/
+
+SET NAMES utf8mb4;
+SET FOREIGN_KEY_CHECKS = 0;
+
+-- ----------------------------
+-- Table structure for announcements
+-- ----------------------------
+DROP TABLE IF EXISTS `announcements`;
+CREATE TABLE `announcements` (
+  `id` int NOT NULL AUTO_INCREMENT,
+  `title` varchar(128) COLLATE utf8mb4_general_ci NOT NULL,
+  `content` text COLLATE utf8mb4_general_ci NOT NULL,
+  `publisher_id` int NOT NULL,
+  `is_top` tinyint DEFAULT '0',
+  `status` tinyint DEFAULT '1',
+  `created_at` datetime NOT NULL,
+  `updated_at` datetime NOT NULL,
+  PRIMARY KEY (`id`),
+  KEY `publisher_id` (`publisher_id`),
+  CONSTRAINT `announcements_ibfk_1` FOREIGN KEY (`publisher_id`) REFERENCES `users` (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;
+
+-- ----------------------------
+-- Table structure for books
+-- ----------------------------
+DROP TABLE IF EXISTS `books`;
+CREATE TABLE `books` (
+  `id` int NOT NULL AUTO_INCREMENT,
+  `title` varchar(255) COLLATE utf8mb4_general_ci NOT NULL,
+  `author` varchar(128) COLLATE utf8mb4_general_ci NOT NULL,
+  `publisher` varchar(128) COLLATE utf8mb4_general_ci DEFAULT NULL,
+  `category_id` int DEFAULT NULL,
+  `tags` varchar(255) COLLATE utf8mb4_general_ci DEFAULT NULL,
+  `isbn` varchar(32) COLLATE utf8mb4_general_ci DEFAULT NULL,
+  `publish_year` varchar(16) COLLATE utf8mb4_general_ci DEFAULT NULL,
+  `description` text COLLATE utf8mb4_general_ci,
+  `cover_url` varchar(255) COLLATE utf8mb4_general_ci DEFAULT NULL,
+  `stock` int DEFAULT '0',
+  `price` decimal(10,2) DEFAULT NULL,
+  `status` tinyint DEFAULT '1',
+  `created_at` datetime NOT NULL,
+  `updated_at` datetime NOT NULL,
+  PRIMARY KEY (`id`),
+  UNIQUE KEY `isbn` (`isbn`),
+  KEY `category_id` (`category_id`),
+  CONSTRAINT `books_ibfk_1` FOREIGN KEY (`category_id`) REFERENCES `categories` (`id`)
+) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;
+
+-- ----------------------------
+-- Table structure for borrow_records
+-- ----------------------------
+DROP TABLE IF EXISTS `borrow_records`;
+CREATE TABLE `borrow_records` (
+  `id` int NOT NULL AUTO_INCREMENT,
+  `user_id` int NOT NULL,
+  `book_id` int NOT NULL,
+  `borrow_date` datetime NOT NULL,
+  `due_date` datetime NOT NULL,
+  `return_date` datetime DEFAULT NULL,
+  `renew_count` int DEFAULT '0',
+  `status` tinyint DEFAULT '1',
+  `remark` varchar(255) COLLATE utf8mb4_general_ci DEFAULT NULL,
+  `created_at` datetime NOT NULL,
+  `updated_at` datetime NOT NULL,
+  PRIMARY KEY (`id`),
+  KEY `user_id` (`user_id`),
+  KEY `book_id` (`book_id`),
+  CONSTRAINT `borrow_records_ibfk_1` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`),
+  CONSTRAINT `borrow_records_ibfk_2` FOREIGN KEY (`book_id`) REFERENCES `books` (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;
+
+-- ----------------------------
+-- Table structure for categories
+-- ----------------------------
+DROP TABLE IF EXISTS `categories`;
+CREATE TABLE `categories` (
+  `id` int NOT NULL AUTO_INCREMENT,
+  `name` varchar(64) COLLATE utf8mb4_general_ci NOT NULL,
+  `parent_id` int DEFAULT NULL,
+  `sort` int DEFAULT '0',
+  PRIMARY KEY (`id`)
+) ENGINE=InnoDB AUTO_INCREMENT=9 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;
+
+-- ----------------------------
+-- Table structure for inventory_logs
+-- ----------------------------
+DROP TABLE IF EXISTS `inventory_logs`;
+CREATE TABLE `inventory_logs` (
+  `id` int NOT NULL AUTO_INCREMENT,
+  `book_id` int NOT NULL,
+  `change_type` varchar(32) COLLATE utf8mb4_general_ci NOT NULL,
+  `change_amount` int NOT NULL,
+  `after_stock` int NOT NULL,
+  `operator_id` int DEFAULT NULL,
+  `remark` varchar(255) COLLATE utf8mb4_general_ci DEFAULT NULL,
+  `changed_at` datetime NOT NULL,
+  PRIMARY KEY (`id`),
+  KEY `book_id` (`book_id`),
+  KEY `operator_id` (`operator_id`),
+  CONSTRAINT `inventory_logs_ibfk_1` FOREIGN KEY (`book_id`) REFERENCES `books` (`id`),
+  CONSTRAINT `inventory_logs_ibfk_2` FOREIGN KEY (`operator_id`) REFERENCES `users` (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;
+
+-- ----------------------------
+-- Table structure for logs
+-- ----------------------------
+DROP TABLE IF EXISTS `logs`;
+CREATE TABLE `logs` (
+  `id` int NOT NULL AUTO_INCREMENT,
+  `user_id` int DEFAULT NULL,
+  `action` varchar(64) COLLATE utf8mb4_general_ci NOT NULL,
+  `target_type` varchar(32) COLLATE utf8mb4_general_ci DEFAULT NULL,
+  `target_id` int DEFAULT NULL,
+  `ip_address` varchar(45) COLLATE utf8mb4_general_ci DEFAULT NULL,
+  `description` varchar(255) COLLATE utf8mb4_general_ci DEFAULT NULL,
+  `created_at` datetime NOT NULL,
+  PRIMARY KEY (`id`),
+  KEY `user_id` (`user_id`),
+  CONSTRAINT `logs_ibfk_1` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;
+
+-- ----------------------------
+-- Table structure for notifications
+-- ----------------------------
+DROP TABLE IF EXISTS `notifications`;
+CREATE TABLE `notifications` (
+  `id` int NOT NULL AUTO_INCREMENT,
+  `user_id` int NOT NULL,
+  `title` varchar(128) COLLATE utf8mb4_general_ci NOT NULL,
+  `content` text COLLATE utf8mb4_general_ci NOT NULL,
+  `type` varchar(32) COLLATE utf8mb4_general_ci NOT NULL,
+  `status` tinyint DEFAULT '0',
+  `sender_id` int DEFAULT NULL,
+  `created_at` datetime NOT NULL,
+  `read_at` datetime DEFAULT NULL,
+  PRIMARY KEY (`id`),
+  KEY `user_id` (`user_id`),
+  KEY `sender_id` (`sender_id`),
+  CONSTRAINT `notifications_ibfk_1` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`),
+  CONSTRAINT `notifications_ibfk_2` FOREIGN KEY (`sender_id`) REFERENCES `users` (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;
+
+-- ----------------------------
+-- Table structure for roles
+-- ----------------------------
+DROP TABLE IF EXISTS `roles`;
+CREATE TABLE `roles` (
+  `id` int NOT NULL AUTO_INCREMENT,
+  `role_name` varchar(32) COLLATE utf8mb4_general_ci NOT NULL,
+  `description` varchar(128) COLLATE utf8mb4_general_ci DEFAULT NULL,
+  PRIMARY KEY (`id`),
+  UNIQUE KEY `role_name` (`role_name`)
+) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;
+
+-- ----------------------------
+-- Table structure for users
+-- ----------------------------
+DROP TABLE IF EXISTS `users`;
+CREATE TABLE `users` (
+  `id` int NOT NULL AUTO_INCREMENT,
+  `username` varchar(64) COLLATE utf8mb4_general_ci NOT NULL,
+  `password` varchar(255) COLLATE utf8mb4_general_ci NOT NULL,
+  `email` varchar(128) COLLATE utf8mb4_general_ci DEFAULT NULL,
+  `phone` varchar(20) COLLATE utf8mb4_general_ci DEFAULT NULL,
+  `nickname` varchar(64) COLLATE utf8mb4_general_ci DEFAULT NULL,
+  `status` tinyint DEFAULT '1',
+  `role_id` int NOT NULL DEFAULT '2',
+  `created_at` datetime NOT NULL,
+  `updated_at` datetime NOT NULL,
+  PRIMARY KEY (`id`),
+  UNIQUE KEY `username` (`username`),
+  UNIQUE KEY `email` (`email`),
+  UNIQUE KEY `phone` (`phone`),
+  KEY `role_id` (`role_id`),
+  CONSTRAINT `users_ibfk_1` FOREIGN KEY (`role_id`) REFERENCES `roles` (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;
+
+SET FOREIGN_KEY_CHECKS = 1;
diff --git a/sql/module1_user.sql b/sql/module1_user.sql
new file mode 100644
index 0000000..3236908
--- /dev/null
+++ b/sql/module1_user.sql
@@ -0,0 +1,28 @@
+-- 角色表
+CREATE TABLE `roles` (
+  `id` INT AUTO_INCREMENT PRIMARY KEY,
+  `role_name` VARCHAR(32) NOT NULL UNIQUE,
+  `description` VARCHAR(128)
+);
+
+-- 用户表
+CREATE TABLE `users` (
+  `id` INT AUTO_INCREMENT PRIMARY KEY,
+  `username` VARCHAR(64) NOT NULL UNIQUE,
+  `password` VARCHAR(255) NOT NULL,
+  `email` VARCHAR(128) UNIQUE,
+  `phone` VARCHAR(20) UNIQUE,
+  `nickname` VARCHAR(64),
+  `status` TINYINT DEFAULT 1,
+  `role_id` INT NOT NULL DEFAULT 2,
+  `created_at` DATETIME NOT NULL,
+  `updated_at` DATETIME NOT NULL,
+  FOREIGN KEY (`role_id`) REFERENCES `roles`(`id`)
+);
+
+-- （可选）初始化角色数据
+INSERT INTO `roles` (`role_name`, `description`) VALUES
+('admin', '管理员'),
+('user', '普通用户');
+
+
diff --git a/sql/module2_book_info.sql b/sql/module2_book_info.sql
new file mode 100644
index 0000000..786a034
--- /dev/null
+++ b/sql/module2_book_info.sql
@@ -0,0 +1,47 @@
+-- 分类表
+CREATE TABLE `categories` (
+  `id` INT AUTO_INCREMENT PRIMARY KEY,
+  `name` VARCHAR(64) NOT NULL,
+  `parent_id` INT DEFAULT NULL,  -- 支持多级分类。顶级分类parent_id为NULL
+  `sort` INT DEFAULT 0           -- 排序字段，可选
+);
+
+-- 图书信息表
+CREATE TABLE `books` (
+  `id` INT AUTO_INCREMENT PRIMARY KEY,
+  `title` VARCHAR(255) NOT NULL,        -- 书名
+  `author` VARCHAR(128) NOT NULL,       -- 作者
+  `publisher` VARCHAR(128),             -- 出版社
+  `category_id` INT,                    -- 分类外键
+  `tags` VARCHAR(255),                  -- 标签（字符串，逗号分隔，可选）
+  `isbn` VARCHAR(32) UNIQUE,            -- ISBN
+  `publish_year` VARCHAR(16),           -- 出版年份
+  `description` TEXT,                   -- 简介
+  `cover_url` VARCHAR(255),             -- 封面图片地址
+  `stock` INT DEFAULT 0,                -- 库存
+  `price` DECIMAL(10,2),                -- 定价
+  `status` TINYINT DEFAULT 1,           -- 1=正常，0=删除
+  `created_at` DATETIME NOT NULL,
+  `updated_at` DATETIME NOT NULL,
+  FOREIGN KEY (`category_id`) REFERENCES `categories`(`id`)
+);
+
+INSERT INTO `categories` (`name`, `parent_id`, `sort`) VALUES
+('文学', NULL, 1),
+  ('小说', 1, 1),
+  ('散文', 1, 2),
+('计算机', NULL, 2),
+  ('编程', 4, 1),
+  ('人工智能', 4, 2),
+('历史', NULL, 3),
+('艺术', NULL, 4);
+
+INSERT INTO `books`
+(`title`, `author`, `publisher`, `category_id`, `tags`, `isbn`, `publish_year`, `description`, `cover_url`, `stock`, `price`, `status`, `created_at`, `updated_at`)
+VALUES
+('三体', '刘慈欣', '重庆出版社', 2, '科幻,宇宙', '9787229100605', '2008', '中国著名科幻小说，三体世界的故事。', '/covers/santi.jpg', 10, 45.00, 1, NOW(), NOW()),
+('解忧杂货店', '东野圭吾', '南海出版公司', 1, '治愈,悬疑', '9787544270878', '2014', '通过信件为人们解忧的杂货店故事。', '/covers/jieyou.jpg', 5, 39.80, 1, NOW(), NOW()),
+('Python编程：从入门到实践', 'Eric Matthes', '人民邮电出版社', 5, '编程,Python', '9787115428028', '2016', '一本面向编程初学者的Python实践书籍。', '/covers/python_book.jpg', 8, 59.00, 1, NOW(), NOW()),
+('人工智能简史', '尼克·博斯特罗姆', '浙江人民出版社', 6, 'AI,未来', '9787213064325', '2018', '人工智能发展的历史及其未来展望。', '/covers/ai_history.jpg', 6, 68.00, 1, NOW(), NOW()),
+('百年孤独', '加西亚·马尔克斯', '南海出版公司', 2, '魔幻现实主义', '9787544291170', '2011', '魔幻现实主义经典小说。', '/covers/bainiangudu.jpg', 3, 58.00, 1, NOW(), NOW()),
+('中国通史', '吕思勉', '中华书局', 7, '历史,中国史', '9787101125455', '2017', '中国历史发展脉络全面梳理。', '/covers/zhongguotongshi.jpg', 7, 49.80, 1, NOW(), NOW());
diff --git a/sql/module3_borrow_record.sql b/sql/module3_borrow_record.sql
new file mode 100644
index 0000000..aff55cf
--- /dev/null
+++ b/sql/module3_borrow_record.sql
@@ -0,0 +1,17 @@
+-- 借阅表
+CREATE TABLE `borrow_records` (
+  `id` INT AUTO_INCREMENT PRIMARY KEY,
+  `user_id` INT NOT NULL,                -- 借阅人（用户id）
+  `book_id` INT NOT NULL,               -- 图书id
+  `borrow_date` DATETIME NOT NULL,      -- 借书时间
+  `due_date` DATETIME NOT NULL,         -- 应还日期
+  `return_date` DATETIME DEFAULT NULL,  -- 实际归还（未归还为空）
+  `renew_count` INT DEFAULT 0,          -- 续借次数
+  `status` TINYINT DEFAULT 1,           -- 1:借出  2:已归还  3:逾期未还
+  `remark` VARCHAR(255),                -- 管理备注
+  `created_at` DATETIME NOT NULL,
+  `updated_at` DATETIME NOT NULL,
+  FOREIGN KEY (`user_id`) REFERENCES `users`(`id`),
+  FOREIGN KEY (`book_id`) REFERENCES `books`(`id`)
+);
+
diff --git a/sql/module4_inventory_logs.sql b/sql/module4_inventory_logs.sql
new file mode 100644
index 0000000..77cc9c7
--- /dev/null
+++ b/sql/module4_inventory_logs.sql
@@ -0,0 +1,13 @@
+-- 库存变动明细表
+CREATE TABLE `inventory_logs` (
+  `id` INT AUTO_INCREMENT PRIMARY KEY,
+  `book_id` INT NOT NULL,              -- 图书id
+  `change_type` VARCHAR(32) NOT NULL,  -- 变动类型
+  `change_amount` INT NOT NULL,        -- 变动数量
+  `after_stock` INT NOT NULL,          -- 变动后的库存
+  `operator_id` INT,                   -- 操作人id
+  `remark` VARCHAR(255),               -- 备注
+  `changed_at` DATETIME NOT NULL,      -- 变动时间
+  FOREIGN KEY (`book_id`) REFERENCES `books`(`id`),
+  FOREIGN KEY (`operator_id`) REFERENCES `users`(`id`)
+);
diff --git a/sql/module5_system_announcement.sql b/sql/module5_system_announcement.sql
new file mode 100644
index 0000000..ad320e4
--- /dev/null
+++ b/sql/module5_system_announcement.sql
@@ -0,0 +1,28 @@
+-- 系统公告表
+CREATE TABLE `announcements` (
+  `id` INT AUTO_INCREMENT PRIMARY KEY,
+  `title` VARCHAR(128) NOT NULL,
+  `content` TEXT NOT NULL,
+  `publisher_id` INT NOT NULL,
+  `is_top` TINYINT DEFAULT 0,       -- 是否置顶
+  `status` TINYINT DEFAULT 1,       -- 1有效 0撤回/禁用
+  `created_at` DATETIME NOT NULL,
+  `updated_at` DATETIME NOT NULL,
+  FOREIGN KEY (`publisher_id`) REFERENCES `users`(`id`)
+);
+
+-- 用户消息通知表
+CREATE TABLE `notifications` (
+  `id` INT AUTO_INCREMENT PRIMARY KEY,
+  `user_id` INT NOT NULL,
+  `title` VARCHAR(128) NOT NULL,
+  `content` TEXT NOT NULL,
+  `type` VARCHAR(32) NOT NULL,        -- 消息类型
+  `status` TINYINT DEFAULT 0,         -- 0未读 1已读
+  `sender_id` INT,                    -- 发送人（系统消息可为NULL或0）
+  `created_at` DATETIME NOT NULL,
+  `read_at` DATETIME DEFAULT NULL,
+  FOREIGN KEY (`user_id`) REFERENCES `users`(`id`),
+  FOREIGN KEY (`sender_id`) REFERENCES `users`(`id`)
+);
+
diff --git a/sql/module7_system_log.sql b/sql/module7_system_log.sql
new file mode 100644
index 0000000..2953834
--- /dev/null
+++ b/sql/module7_system_log.sql
@@ -0,0 +1,12 @@
+-- 日志管理表
+CREATE TABLE `logs` (
+  `id` INT AUTO_INCREMENT PRIMARY KEY,
+  `user_id` INT,                       -- 操作者id
+  `action` VARCHAR(64) NOT NULL,        -- 操作名
+  `target_type` VARCHAR(32),            -- 对象类型
+  `target_id` INT,                      -- 对象id
+  `ip_address` VARCHAR(45),             -- 操作来源ip
+  `description` VARCHAR(255),           -- 补充描述
+  `created_at` DATETIME NOT NULL,
+  FOREIGN KEY (`user_id`) REFERENCES `users`(`id`)
+);
\ No newline at end of file