:root {
            --primary-color: #1a3e6f;
            --secondary-color: #4d8fc9;
            --accent-color: #4CAF50;
            --neutral-color: #6c757d;
            --light-color: #f8f9fa;
            --dark-color: #212529;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            color: #333;
            background-color: #f8f9fa;
        }
        
        /* Navigation */
        #ai_auto_navbar {
            background-color: white;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            padding: 0.5rem 0;
        }
        
        .ai_auto_navbar-brand {
            color: var(--primary-color);
            font-weight: 700;
            font-size: 1.5rem;
        }
        
        .ai_auto_nav-link {
            color: var(--dark-color);
            font-weight: 500;
            margin: 0 0.5rem;
            transition: all 0.3s ease;
        }
        
        .ai_auto_nav-link:hover {
            color: var(--secondary-color);
        }
        
        .ai_auto_search-form {
            position: relative;
            max-width: 300px;
        }
        
        /* Banner Section */
        #ai_auto_banner {
            background: linear-gradient(rgba(26, 62, 111, 0.9), rgba(26, 62, 111, 0.8)), url('https://images.unsplash.com/photo-1532094349884-543bc11b234d?ixlib=rb-4.0.3&auto=format&fit=crop&w=1950&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 5rem 0;
            text-align: center;
        }
        
        .ai_auto_banner-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        
        .ai_auto_banner-info {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 2rem;
        }
        
        .ai_auto_search-box {
            max-width: 600px;
            margin: 0 auto;
        }
        
        /* Article Sections */
        #ai_auto_home-artice {
            padding: 4rem 0;
        }
        
        .ai_auto_section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 30px;
            color: var(--primary-color);
            font-weight: 700;
        }
        
        .ai_auto_section-title:after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 50px;
            height: 3px;
            background: var(--accent-color);
        }
        
        /* Feature Articles */
        #ai_auto_feature-article {
            margin-bottom: 4rem;
        }
        
        .ai_auto_feature-card {
            height: 100%;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            transition: transform 0.3s ease;
        }
        
        .ai_auto_feature-card:hover {
            transform: translateY(-5px);
        }
        
        .ai_auto_feature-img {
            height: 200px;
            width: 100%;
            object-fit: cover;
        }
        
        .ai_auto_feature-body {
            padding: 1.5rem;
        }
        
        .ai_auto_feature-title {
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 0.8rem;
        }
        
        .ai_auto_feature-meta {
            color: var(--neutral-color);
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }
        
        /* Last Articles */
        #ai_auto_last-article {
            margin-bottom: 4rem;
        }
        
        .ai_auto_last-card {
            border: none;
            border-radius: 0;
            border-bottom: 1px solid #eee;
            padding: 1.5rem 0;
        }
        
        .ai_auto_last-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 5px;
        }
        
        .ai_auto_last-title {
            font-weight: 600;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }
        
        .ai_auto_last-desc {
            color: var(--neutral-color);
            font-size: 0.95rem;
            margin-bottom: 0.8rem;
        }
        
        /* Recommend Articles */
        #ai_auto_recommend-article {
            background-color: #f0f7ff;
            padding: 2rem;
            border-radius: 10px;
        }
        
        .ai_auto_recommend-item {
            margin-bottom: 1.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid #e0e0e0;
        }
        
        .ai_auto_recommend-item:last-child {
            margin-bottom: 0;
            padding-bottom: 0;
            border-bottom: none;
        }
        
        .ai_auto_recommend-title {
            font-weight: 600;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }
        
        .ai_auto_tag {
            display: inline-block;
            background-color: var(--secondary-color);
            color: white;
            padding: 3px 10px;
            border-radius: 20px;
            font-size: 0.8rem;
            margin-right: 5px;
            margin-bottom: 5px;
        }
        
        /* Subscribe Section */
        #ai_auto_subscribe {
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 4rem 0;
        }
        
        .ai_auto_subscribe-title {
            font-weight: 700;
            margin-bottom: 1rem;
        }
        
        .ai_auto_subscribe-form {
            max-width: 600px;
            margin: 0 auto;
        }
        
        /* Footer */
        #ai_auto_footer {
            background-color: var(--dark-color);
            color: white;
            padding: 4rem 0 0;
        }
        
        .ai_auto_footer-title {
            font-weight: 600;
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
            position: relative;
            padding-bottom: 10px;
        }
        
        .ai_auto_footer-title:after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 40px;
            height: 2px;
            background: var(--accent-color);
        }
        
        .ai_auto_footer-link {
            display: block;
            color: #aaa;
            text-decoration: none;
            margin-bottom: 0.8rem;
            transition: all 0.3s ease;
        }
        
        .ai_auto_footer-link:hover {
            color: white;
            padding-left: 5px;
        }
        
        .ai_auto_contact-item {
            margin-bottom: 1rem;
            color: #aaa;
        }
        
        .ai_auto_copyright {
            background-color: rgba(0,0,0,0.2);
            padding: 1.5rem 0;
            margin-top: 3rem;
            text-align: center;
            color: #aaa;
        }
        
        @media (max-width: 768px) {
            .ai_auto_banner-title {
                font-size: 2rem;
            }
            
            .ai_auto_feature-card {
                margin-bottom: 2rem;
            }
        }