/* Page Header */
        .page-header {
            background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
            color: white;
            padding: 150px 0 80px;
            margin-top: 90px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .page-header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('/template/jia/images/11.jpg') center/cover no-repeat;
            opacity: 0.2;
        }

        .page-header h1 {
            font-size: 48px;
            margin-bottom: 20px;
            position: relative;
            z-index: 2;
        }

        .page-header p {
            font-size: 20px;
            max-width: 700px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
            opacity: 0.9;
        }

        /* Knowledge Section */
        .knowledge-section {
            background-color: var(--light-color);
            position: relative;
            overflow: hidden;
        }

        .knowledge-section::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -100px;
            width: 300px;
            height: 300px;
            background: linear-gradient(135deg, rgba(198, 10, 39, 0.05) 0%, rgba(230, 57, 70, 0.05) 100%);
            border-radius: 50%;
        }

        .knowledge-section::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -100px;
            width: 400px;
            height: 400px;
            background: linear-gradient(135deg, rgba(198, 10, 39, 0.05) 0%, rgba(230, 57, 70, 0.05) 100%);
            border-radius: 50%;
        }

        .ad-banner {
            background: linear-gradient(135deg, #ffe6e6, #ffcccc);
            padding: 25px;
            border-radius: 15px;
            margin-bottom: 50px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow);
        }

        .ad-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 5px;
            height: 100%;
            background: linear-gradient(to bottom, var(--primary-color), var(--primary-light));
        }

        .ad-banner h3 {
            font-size: 24px;
            color: var(--primary-dark);
            margin-bottom: 10px;
        }

        .ad-banner p {
            color: var(--primary-dark);
            font-size: 18px;
            font-weight: 600;
        }

        .knowledge-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 35px;
            margin-bottom: 60px;
            position: relative;
            z-index: 2;
        }

        .knowledge-card {
            background-color: white;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .knowledge-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow-hover);
        }

        .knowledge-image {
            height: 220px;
            overflow: hidden;
            position: relative;
        }

        .knowledge-image::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(to bottom, transparent 0%, rgba(26,26,26,0.7) 100%);
            z-index: 1;
            opacity: 0;
            transition: var(--transition);
        }

        .knowledge-card:hover .knowledge-image::before {
            opacity: 1;
        }

        .knowledge-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .knowledge-card:hover .knowledge-image img {
            transform: scale(1.1);
        }

        .knowledge-content {
            padding: 25px;
        }

        .knowledge-category {
            display: inline-block;
            background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
            color: white;
            padding: 5px 12px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 15px;
        }

        .knowledge-content h3 {
            font-size: 20px;
            margin-bottom: 12px;
            color: var(--dark-color);
            font-weight: 700;
        }

        .knowledge-content p {
            color: var(--gray-color);
            font-size: 15px;
            margin-bottom: 18px;
        }

        .knowledge-meta {
            display: flex;
            justify-content: space-between;
            color: var(--gray-color);
            font-size: 13px;
        }

        .knowledge-meta span {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        /* Pagination */
        .pagination {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 10px;
            margin-top: 50px;
        }

        .page-num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background-color: white;
            color: var(--dark-color);
            font-weight: 600;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }

        .page-num:hover {
            background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(198, 10, 39, 0.2);
        }

        .page-num-current {
            background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(198, 10, 39, 0.2);
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
            color: white;
            text-align: center;
            padding: 80px 0;
        }

        .cta-section h2 {
            font-size: 36px;
            margin-bottom: 20px;
        }

        .cta-section p {
            font-size: 18px;
            margin-bottom: 30px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
            opacity: 0.9;
        }

    

        /* Responsive Styles */
        @media (max-width: 992px) {
            .knowledge-grid {
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            }
        }

        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }
            
            nav {
                position: fixed;
                top: 90px;
                left: -100%;
                width: 85%;
                height: calc(100vh - 90px);
                background-color: white;
                transition: var(--transition);
                box-shadow: 2px 0 20px rgba(0, 0, 0, 0.1);
                z-index: 999;
                padding: 30px;
            }
            
            nav.active {
                left: 0;
            }
            
            nav ul {
                flex-direction: column;
            }
            
            nav ul li {
                margin: 0 0 25px 0;
            }
            
            .page-header {
                padding: 130px 0 60px;
            }
            
            .page-header h1 {
                font-size: 36px;
            }
            
            .page-header p {
                font-size: 18px;
            }
            
            .section {
                padding: 80px 0;
            }
            
            .section-title h2 {
                font-size: 34px;
            }
            
            .contact-phone {
                display: none;
            }
            
            .knowledge-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 576px) {
            .page-header h1 {
                font-size: 30px;
            }
            
            .page-header p {
                font-size: 16px;
            }
            
            .section {
                padding: 60px 0;
            }
            
            .section-title h2 {
                font-size: 28px;
            }
            
            .ad-banner h3 {
                font-size: 20px;
            }
            
            .ad-banner p {
                font-size: 16px;
            }
            
            .footer-content {
                grid-template-columns: 1fr;
                gap: 40px;
            }
        }