feat: 完成全站UI优化 - 科技感/未来风设计

- 前台页面全面升级为Tailwind CSS框架
- 引入Google Fonts (Space Grotesk, Noto Sans)
- 主色调更新为#25c0f4 (cyan blue)
- 实现玻璃态效果和渐变背景
- 优化首页网格卡片布局和悬停动画
- 优化详情页双栏布局和渐变Logo光晕
- 优化管理员登录页，添加科技网格背景
- Flask-Admin后台完整深色主题
- 统一Material Symbols图标系统
- 网站自动抓取功能界面优化

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

models.py

@@ -0,0 +1,102 @@
+from datetime import datetime
+from flask_sqlalchemy import SQLAlchemy
+from flask_login import UserMixin
+from werkzeug.security import generate_password_hash, check_password_hash
+
+db = SQLAlchemy()
+
+# 网站和标签的多对多关系表
+site_tags = db.Table('site_tags',
+    db.Column('site_id', db.Integer, db.ForeignKey('sites.id'), primary_key=True),
+    db.Column('tag_id', db.Integer, db.ForeignKey('tags.id'), primary_key=True)
+)
+
+class Site(db.Model):
+    """网站模型"""
+    __tablename__ = 'sites'
+
+    id = db.Column(db.Integer, primary_key=True)
+    name = db.Column(db.String(100), nullable=False, comment='网站名称')
+    url = db.Column(db.String(500), nullable=False, comment='网站URL')
+    slug = db.Column(db.String(100), unique=True, nullable=False, comment='URL别名')
+    logo = db.Column(db.String(500), comment='Logo图片路径')
+    short_desc = db.Column(db.String(200), comment='简短描述')
+    description = db.Column(db.Text, comment='详细介绍')
+    features = db.Column(db.Text, comment='主要功能')
+    is_active = db.Column(db.Boolean, default=True, comment='是否启用')
+    view_count = db.Column(db.Integer, default=0, comment='浏览次数')
+    sort_order = db.Column(db.Integer, default=0, comment='排序权重')
+    created_at = db.Column(db.DateTime, default=datetime.now, comment='创建时间')
+    updated_at = db.Column(db.DateTime, default=datetime.now, onupdate=datetime.now, comment='更新时间')
+
+    # 关联标签
+    tags = db.relationship('Tag', secondary=site_tags, lazy='subquery',
+                          backref=db.backref('sites', lazy=True))
+
+    def __repr__(self):
+        return f'<Site {self.name}>'
+
+    def to_dict(self):
+        """转换为字典"""
+        return {
+            'id': self.id,
+            'name': self.name,
+            'url': self.url,
+            'slug': self.slug,
+            'logo': self.logo,
+            'short_desc': self.short_desc,
+            'description': self.description,
+            'features': self.features,
+            'is_active': self.is_active,
+            'view_count': self.view_count,
+            'tags': [tag.name for tag in self.tags],
+            'created_at': self.created_at.strftime('%Y-%m-%d %H:%M:%S') if self.created_at else None
+        }
+
+class Tag(db.Model):
+    """标签模型"""
+    __tablename__ = 'tags'
+
+    id = db.Column(db.Integer, primary_key=True)
+    name = db.Column(db.String(50), unique=True, nullable=False, comment='标签名称')
+    slug = db.Column(db.String(50), unique=True, nullable=False, comment='URL别名')
+    description = db.Column(db.String(200), comment='标签描述')
+    icon = db.Column(db.String(100), comment='图标')
+    sort_order = db.Column(db.Integer, default=0, comment='排序权重')
+    created_at = db.Column(db.DateTime, default=datetime.now, comment='创建时间')
+
+    def __repr__(self):
+        return f'<Tag {self.name}>'
+
+    def to_dict(self):
+        """转换为字典"""
+        return {
+            'id': self.id,
+            'name': self.name,
+            'slug': self.slug,
+            'description': self.description,
+            'icon': self.icon
+        }
+
+class Admin(UserMixin, db.Model):
+    """管理员模型"""
+    __tablename__ = 'admins'
+
+    id = db.Column(db.Integer, primary_key=True)
+    username = db.Column(db.String(50), unique=True, nullable=False, comment='用户名')
+    password_hash = db.Column(db.String(255), nullable=False, comment='密码哈希')
+    email = db.Column(db.String(100), comment='邮箱')
+    is_active = db.Column(db.Boolean, default=True, comment='是否启用')
+    created_at = db.Column(db.DateTime, default=datetime.now, comment='创建时间')
+    last_login = db.Column(db.DateTime, comment='最后登录时间')
+
+    def set_password(self, password):
+        """设置密码"""
+        self.password_hash = generate_password_hash(password)
+
+    def check_password(self, password):
+        """验证密码"""
+        return check_password_hash(self.password_hash, password)
+
+    def __repr__(self):
+        return f'<Admin {self.username}>'