@import url('/css/fontawesome/css/all.min.css');
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

        body {
            padding-top: 80px;
            min-height: 150vh;
        }

        /* 导航条样式 */
        .top-navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 70px;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            display: flex;
            align-items: center;
            padding: 0 15px;
            z-index: 1000;
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
        }

        .logo {
            display: flex;
            align-items: center;
            margin-right: 40px;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 12px;
            color: white;
            font-size: 18px;
        }

        .logo-text {
            color: #2d3748;
            font-size: 22px;
            font-weight: 700;
            letter-spacing: -0.5px;
        }

        .nav-buttons {
            display: flex;
            flex: 1;
            height: 100%;
            font-size:1.6rem;
        }

        .nav-button {
            display: flex;
            align-items: center;
            padding: 0 22px;
            height: 100%;
            color: #4a5568;
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            position: relative;
            cursor: pointer;
            font-size: 15px;
        }

        .nav-button:hover {
            color: #667eea;
        }

        .nav-button:hover::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 20%;
            width: 60%;
            height: 3px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border-radius: 3px 3px 0 0;
        }

        .nav-button.active {
            color: #667eea;
            font-weight: 600;
        }

        .nav-button.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 20%;
            width: 60%;
            height: 3px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border-radius: 3px 3px 0 0;
        }

        .nav-button i {
            margin-right: 10px;
            font-size: 18px;
        }

        .home-button {
            margin-left: auto;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border-radius: 8px;
            padding: 0 24px;
            height: 44px;
            align-self: center;
            box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
            transition: all 0.3s ease;
        }

        .home-button:hover {
            transform: translateY(0px);
            box-shadow: 0 6px 16px rgba(102, 126, 234, 0.4);
            color: white !important;
        }

        .home-button:hover::after {
            display: none;
        }

        /* 页面内容样式 */
        .content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 30px;
        }

        .section {
            background: white;
            border-radius: 12px;
            padding: 30px;
            margin-bottom: 30px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s ease;
        }

        .section:hover {
            transform: translateY(-5px);
        }

        h1 {
            color: #2d3748;
            margin-bottom: 20px;
            font-weight: 700;
            font-size: 28px;
        }

        .highlight {
            background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            font-weight: 700;
        }
        

        #catalog{
        	font-size:20px;
        }

					h3{
						color:#2d3748;
						font-weight:600;
						font-size:22px;
						margin-top:15px;
						padding-left:34px;
					}
					.space{
						height:50px;
					}
					.caption{
						white-space:nowrap;
					}
					h4{
						color:black;
						font-weight:600;
						font-size:20px;
					}
					.sub-title2{
						font-size:20px;
					}
					.sub-title2 a,.sub-title3 a,.sub-title2 a:hover,.sub-title3 a:hover{
						color:black !important;
					}

        /* 响应式设计 */
        @media (max-width: 900px) {
            .nav-button span {
                display: none;
            }
            
            .nav-button i {
                margin-right: 0;
                font-size: 20px;
            }
            
            .logo-text {
                display: none;
            }
            
            .top-navbar {
                padding: 0 15px;
            }
            
            .home-button span {
                display: none;
            }
            
            .home-button i {
                margin-right: 0;
            }
            h3{
							padding-left:0px;
						}
        }
        
        @media (max-width: 480px) {
            .top-navbar {
                height: 60px;
            }
            
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }
            
            .home-button {
                height: 40px;
                padding: 0 18px;
            }
        }