:root {
            --primary-color: #2c6fbb;
            --secondary-color-1: #4caf50;
            --secondary-color-2: #8e44ad;
            --secondary-color-3: #16a085;
            --light-bg: #f8f9fa;
            --dark-text: #212529;
        }
        
        body {
            font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            color: var(--dark-text);
            background-color: #ffffff;
            overflow-x: hidden;
        }
        
        /* Navigation Bar */
        #ai_auto_navbar {
            background-color: white;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            padding: 0.8rem 0;
        }
        
        #ai_auto_navbar .navbar-brand {
            font-weight: 700;
            color: var(--primary-color);
            font-size: 1.5rem;
        }
        
        #ai_auto_navbar .nav-link {
            color: #555;
            font-weight: 500;
            margin: 0 0.5rem;
            transition: all 0.3s ease;
        }
        
        #ai_auto_navbar .nav-link:hover {
            color: var(--primary-color);
        }
        
        #ai_auto_navbar .search-form {
            position: relative;
        }
        
        #ai_auto_navbar .search-btn {
            position: absolute;
            right: 10px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: var(--primary-color);
        }
        
        /* Banner Section */
        #ai_auto_banner {
            background: linear-gradient(rgba(44, 111, 187, 0.85), rgba(44, 111, 187, 0.9)), 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;
            padding: 6rem 0;
            color: white;
            text-align: center;
        }
        
        #ai_auto_banner .banner-title {
            font-size: 3rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 4px rgba(0,0,0,0.2);
        }
        
        #ai_auto_banner .banner-description {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 2.5rem;
            opacity: 0.9;
        }
        
        #ai_auto_banner .search-form {
            max-width: 700px;
            margin: 0 auto;
        }
        
        #ai_auto_banner .search-input {
            height: 55px;
            padding: 0 1.5rem;
            border-radius: 50px;
            border: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.15);
        }
        
        #ai_auto_banner .search-btn {
            position: absolute;
            right: 5px;
            top: 5px;
            height: 45px;
            width: 120px;
            border-radius: 50px;
            background-color: var(--secondary-color-1);
            border: none;
            color: white;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        
        #ai_auto_banner .search-btn:hover {
            background-color: #3d8b40;
        }
        
        /* Article Sections */
        #ai_auto_home-artice {
            padding: 5rem 0;
            background-color: var(--light-bg);
        }
        
        .section-title {
            position: relative;
            font-weight: 700;
            margin-bottom: 2.5rem;
            color: var(--primary-color);
            text-align: center;
        }
        
        .section-title:after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--primary-color);
            border-radius: 2px;
        }
        
        /* Featured Articles - Grid with Hover Effects */
        #ai_auto_feature-article {
            margin-bottom: 5rem;
        }
        
        .featured-card {
            border-radius: 12px;
            overflow: hidden;
            height: 100%;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            background: white;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        
        .featured-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        
        .featured-card .card-img-container {
            height: 200px;
            overflow: hidden;
        }
        
        .featured-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        
        .featured-card:hover img {
            transform: scale(1.05);
        }
        
        .featured-card .card-body {
            padding: 1.5rem;
        }
        
        .featured-card .card-title {
            font-weight: 700;
            font-size: 1.25rem;
            margin-bottom: 0.75rem;
            color: var(--primary-color);
        }
        
        .featured-card .card-text {
            color: #666;
            margin-bottom: 1rem;
        }
        
        .featured-card .card-meta {
            display: flex;
            justify-content: space-between;
            color: #777;
            font-size: 0.85rem;
            border-top: 1px solid #eee;
            padding-top: 0.75rem;
            margin-top: 0.75rem;
        }
        
        .featured-card .card-labels {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 1rem;
        }
        
        .featured-card .label {
            background-color: rgba(44, 111, 187, 0.1);
            color: var(--primary-color);
            padding: 0.25rem 0.75rem;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 500;
        }
        
        /* Recent Articles - Timeline Layout */
        #ai_auto_last-article {
            margin-bottom: 5rem;
        }
        
        .timeline-container {
            position: relative;
            padding-left: 30px;
        }
        
        .timeline-container:before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            height: 100%;
            width: 4px;
            background: var(--primary-color);
            border-radius: 2px;
        }
        
        .timeline-item {
            position: relative;
            padding-left: 30px;
            margin-bottom: 2.5rem;
        }
        
        .timeline-item:before {
            content: '';
            position: absolute;
            left: -8px;
            top: 10px;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: white;
            border: 4px solid var(--primary-color);
        }
        
        .timeline-item .timeline-date {
            font-size: 0.9rem;
            color: var(--secondary-color-2);
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        
        .timeline-item .timeline-title {
            font-weight: 700;
            font-size: 1.15rem;
            margin-bottom: 0.75rem;
            color: var(--primary-color);
        }
        
        .timeline-item .timeline-content {
            background: white;
            border-radius: 10px;
            padding: 1.5rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        
        .timeline-item .timeline-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 8px;
            margin-bottom: 1rem;
        }
        
        .timeline-item .timeline-labels {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 1rem;
        }
        
        .timeline-item .label {
            background-color: rgba(142, 68, 173, 0.1);
            color: var(--secondary-color-2);
            padding: 0.25rem 0.75rem;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 500;
        }
        
        /* Recommended Articles - Masonry Layout */
        #ai_auto_recommend-article {
            margin-bottom: 3rem;
        }
        
        .masonry-grid {
            column-count: 3;
            column-gap: 1.5rem;
        }
        
        .masonry-item {
            break-inside: avoid;
            background: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-bottom: 1.5rem;
            transition: transform 0.3s ease;
        }
        
        .masonry-item:hover {
            transform: translateY(-5px);
        }
        
        .masonry-item .masonry-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        
        .masonry-item .masonry-body {
            padding: 1.25rem;
        }
        
        .masonry-item .masonry-title {
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 0.5rem;
            color: var(--primary-color);
        }
        
        .masonry-item .masonry-author {
            color: var(--secondary-color-3);
            font-weight: 500;
            font-size: 0.9rem;
            margin-bottom: 0.5rem;
        }
        
        .masonry-item .masonry-labels {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 0.75rem;
        }
        
        .masonry-item .label {
            background-color: rgba(22, 160, 133, 0.1);
            color: var(--secondary-color-3);
            padding: 0.25rem 0.75rem;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 500;
        }
        
        /* Subscribe Section */
        #ai_auto_subscribe {
            padding: 5rem 0;
            background: linear-gradient(135deg, #2c6fbb, #16a085);
            color: white;
            text-align: center;
        }
        
        #ai_auto_subscribe .subscribe-title {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        
        #ai_auto_subscribe .subscribe-info {
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 2rem;
            opacity: 0.9;
        }
        
        #ai_auto_subscribe .subscribe-form {
            max-width: 500px;
            margin: 0 auto;
        }
        
        #ai_auto_subscribe .email-input {
            height: 55px;
            padding: 0 1.5rem;
            border-radius: 50px 0 0 50px;
            border: none;
            width: calc(100% - 140px);
        }
        
        #ai_auto_subscribe .subscribe-btn {
            height: 55px;
            width: 140px;
            border-radius: 0 50px 50px 0;
            background-color: var(--secondary-color-1);
            border: none;
            color: white;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        
        #ai_auto_subscribe .subscribe-btn:hover {
            background-color: #3d8b40;
        }
        
        /* Footer Section */
        #ai_auto_footer {
            background-color: #1a1a2e;
            color: #ddd;
            padding-top: 4rem;
        }
        
        #ai_auto_footer .footer-title {
            color: white;
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 0.75rem;
        }
        
        #ai_auto_footer .footer-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background: var(--primary-color);
            border-radius: 2px;
        }
        
        #ai_auto_footer .footer-links {
            list-style: none;
            padding-left: 0;
        }
        
        #ai_auto_footer .footer-links li {
            margin-bottom: 0.8rem;
        }
        
        #ai_auto_footer .footer-links a {
            color: #aaa;
            text-decoration: none;
            transition: all 0.3s ease;
        }
        
        #ai_auto_footer .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        
        #ai_auto_footer .footer-contact p {
            display: flex;
            align-items: center;
            margin-bottom: 1rem;
        }
        
        #ai_auto_footer .footer-contact i {
            margin-right: 10px;
            color: var(--primary-color);
            width: 20px;
        }
        
        #ai_auto_footer .copyright {
            background-color: rgba(0,0,0,0.2);
            padding: 1.5rem 0;
            margin-top: 3rem;
            text-align: center;
        }
        
        /* Responsive Styles */
        @media (max-width: 992px) {
            .masonry-grid {
                column-count: 2;
            }
        }
        
        @media (max-width: 768px) {
            .masonry-grid {
                column-count: 1;
            }
            
            #ai_auto_banner {
                padding: 4rem 0;
            }
            
            #ai_auto_banner .banner-title {
                font-size: 2.2rem;
            }
            
            .section-title {
                font-size: 1.8rem;
            }
        }
        
        @media (max-width: 576px) {
            #ai_auto_navbar .navbar-nav {
                margin-top: 1rem;
            }
            
            #ai_auto_banner .banner-title {
                font-size: 1.8rem;
            }
            
            #ai_auto_banner .banner-description {
                font-size: 1rem;
            }
            
            .section-title {
                font-size: 1.5rem;
            }
            
            #ai_auto_subscribe .subscribe-title {
                font-size: 1.8rem;
            }
        }