:root {
            --ai_auto_primary: #2C6BED;
            --ai_auto_success: #4CAF50;
            --ai_auto_warning: #FF9800;
            --ai_auto_purple: #9C27B0;
            --ai_auto_light: #f8f9fa;
            --ai_auto_dark: #212529;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: #f5f7fa;
            color: #333;
        }
        
        /* 导航条样式 */
        #ai_auto_navbar {
            background: linear-gradient(135deg, #1a56db 0%, #2C6BED 100%);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            padding: 0.8rem 0;
        }
        
        .ai_auto_navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: white !important;
            display: flex;
            align-items: center;
        }
        
        .ai_auto_navbar-brand i {
            margin-right: 10px;
            color: #FF9800;
        }
        
        .ai_auto_nav-link {
            color: rgba(255, 255, 255, 0.85) !important;
            font-weight: 500;
            padding: 0.5rem 1rem !important;
            transition: all 0.3s ease;
            border-radius: 4px;
        }
        
        .ai_auto_nav-link:hover {
            color: white !important;
            background-color: rgba(255, 255, 255, 0.15);
        }
        
        .ai_auto_search_form {
            position: relative;
        }
        
        .ai_auto_search_input {
            border-radius: 50px;
            padding: 0.5rem 1.5rem;
            border: none;
            background-color: rgba(255, 255, 255, 0.2);
            color: white;
            transition: all 0.3s ease;
        }
        
        .ai_auto_search_input:focus {
            background-color: rgba(255, 255, 255, 0.3);
            box-shadow: 0 0 0 0.25rem rgba(44, 107, 237, 0.25);
            color: white;
        }
        
        .ai_auto_search_input::placeholder {
            color: rgba(255, 255, 255, 0.7);
        }
        
        .ai_auto_search_btn {
            position: absolute;
            right: 10px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: white;
        }
        
        /* Banner 样式 */
        #ai_auto_banner {
            background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), 
                         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;
            margin-bottom: 3rem;
        }
        
        .ai_auto_banner_title {
            font-size: 3rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
        }
        
        .ai_auto_banner_info {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 2.5rem;
            opacity: 0.9;
        }
        
        .ai_auto_banner_search {
            max-width: 700px;
            margin: 0 auto;
        }
        
        .ai_auto_banner_search .form-control {
            padding: 1rem 1.8rem;
            border-radius: 50px;
            border: none;
        }
        
        /* 文章板块通用样式 */
        #ai_auto_home-artice {
            margin-bottom: 5rem;
        }
        
        .ai_auto_section_title {
            position: relative;
            font-weight: 700;
            margin-bottom: 2.5rem;
            padding-bottom: 1rem;
            color: var(--ai_auto_dark);
            text-align: center;
        }
        
        .ai_auto_section_title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--ai_auto_primary);
            border-radius: 2px;
        }
        
        .ai_auto_article_card {
            height: 100%;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: none;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
        }
        
        .ai_auto_article_card:hover {
            transform: translateY(-10px);
            box-shadow: 0 12px 25px rgba(0, 0, 0, 0.15);
        }
        
        .ai_auto_article_img_container {
            height: 200px;
            overflow: hidden;
        }
        
        .ai_auto_article_img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        
        .ai_auto_article_card:hover .ai_auto_article_img {
            transform: scale(1.05);
        }
        
        .ai_auto_article_title {
            font-weight: 700;
            font-size: 1.3rem;
            margin-bottom: 0.8rem;
            color: var(--ai_auto_dark);
            transition: color 0.3s ease;
        }
        
        .ai_auto_article_title a {
            color: inherit;
            text-decoration: none;
        }
        
        .ai_auto_article_title a:hover {
            color: var(--ai_auto_primary);
        }
        
        .ai_auto_article_desc {
            color: #666;
            margin-bottom: 1.2rem;
            font-size: 0.95rem;
        }
        
        .ai_auto_article_meta {
            color: #777;
            font-size: 0.85rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1rem;
        }
        
        .ai_auto_article_labels {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 0.8rem;
        }
        
        .ai_auto_label {
            background-color: rgba(44, 107, 237, 0.1);
            color: var(--ai_auto_primary);
            padding: 0.25rem 0.75rem;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            transition: all 0.3s ease;
        }
        
        .ai_auto_label:hover {
            background-color: var(--ai_auto_primary);
            color: white;
            text-decoration: none;
        }
        
        /* 特色文章板块 - 网格+卡片动效 */
        #ai_auto_feature-article .ai_auto_article_card {
            background-color: white;
        }
        
        #ai_auto_feature-article .ai_auto_article_img_container {
            height: 220px;
        }
        
        /* 最近文章板块 - 时间轴布局 */
        #ai_auto_last-article {
            margin: 4rem 0;
            padding: 3rem 0;
            background-color: #f0f7ff;
            border-radius: 15px;
        }
        
        .ai_auto_timeline {
            position: relative;
            max-width: 1200px;
            margin: 0 auto;
        }
        
        .ai_auto_timeline::after {
            content: '';
            position: absolute;
            width: 4px;
            background-color: var(--ai_auto_primary);
            top: 0;
            bottom: 0;
            left: 50%;
            margin-left: -2px;
            border-radius: 2px;
        }
        
        .ai_auto_timeline_item {
            position: relative;
            width: 50%;
            padding: 20px 40px;
            box-sizing: border-box;
        }
        
        .ai_auto_timeline_item:nth-child(odd) {
            left: 0;
        }
        
        .ai_auto_timeline_item:nth-child(even) {
            left: 50%;
        }
        
        .ai_auto_timeline_item::after {
            content: '';
            position: absolute;
            width: 20px;
            height: 20px;
            background-color: white;
            border: 4px solid var(--ai_auto_primary);
            top: 30px;
            border-radius: 50%;
            z-index: 1;
        }
        
        .ai_auto_timeline_item:nth-child(odd)::after {
            right: -12px;
        }
        
        .ai_auto_timeline_item:nth-child(even)::after {
            left: -12px;
        }
        
        .ai_auto_timeline_content {
            background-color: white;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            padding: 25px;
            transition: transform 0.3s ease;
        }
        
        .ai_auto_timeline_content:hover {
            transform: translateY(-5px);
        }
        
        /* 推荐文章板块 - 卡片瀑布布局 */
        #ai_auto_recommend-article {
            margin-top: 4rem;
        }
        
        .ai_auto_masonry {
            column-count: 3;
            column-gap: 30px;
        }
        
        .ai_auto_masonry_item {
            display: inline-block;
            width: 100%;
            margin-bottom: 30px;
            break-inside: avoid;
        }
        
        /* 订阅板块 */
        #ai_auto_subscribe {
            background: linear-gradient(135deg, #2C6BED 0%, #1a56db 100%);
            padding: 5rem 0;
            color: white;
            text-align: center;
            border-radius: 15px;
            margin-bottom: 5rem;
        }
        
        .ai_auto_subscribe_title {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        
        .ai_auto_subscribe_info {
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 2.5rem;
            opacity: 0.9;
        }
        
        .ai_auto_subscribe_form {
            max-width: 500px;
            margin: 0 auto;
            display: flex;
        }
        
        .ai_auto_subscribe_input {
            flex: 1;
            padding: 1rem 1.5rem;
            border: none;
            border-radius: 50px 0 0 50px;
        }
        
        .ai_auto_subscribe_btn {
            background-color: var(--ai_auto_warning);
            color: white;
            border: none;
            border-radius: 0 50px 50px 0;
            padding: 0 1.8rem;
            font-weight: 600;
            transition: background-color 0.3s ease;
        }
        
        .ai_auto_subscribe_btn:hover {
            background-color: #e68a00;
        }
        
        /* Footer 样式 */
        #ai_auto_footer {
            background-color: #1a202c;
            color: #a0aec0;
            padding-top: 4rem;
        }
        
        .ai_auto_footer_title {
            color: white;
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 0.8rem;
        }
        
        .ai_auto_footer_title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background-color: var(--ai_auto_primary);
            border-radius: 2px;
        }
        
        .ai_auto_footer_desc {
            margin-bottom: 1.5rem;
            line-height: 1.7;
        }
        
        .ai_auto_footer_list {
            list-style: none;
            padding: 0;
        }
        
        .ai_auto_footer_list li {
            margin-bottom: 0.8rem;
        }
        
        .ai_auto_footer_list a {
            color: #a0aec0;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        
        .ai_auto_footer_list a:hover {
            color: white;
            text-decoration: underline;
        }
        
        .ai_auto_contact_item {
            display: flex;
            align-items: flex-start;
            margin-bottom: 1rem;
        }
        
        .ai_auto_contact_icon {
            color: var(--ai_auto_primary);
            margin-right: 12px;
            font-size: 1.1rem;
            min-width: 20px;
        }
        
        .ai_auto_copyright {
            background-color: rgba(0, 0, 0, 0.2);
            padding: 1.5rem 0;
            margin-top: 4rem;
            text-align: center;
            font-size: 0.9rem;
        }
        
        /* 响应式调整 */
        @media (max-width: 992px) {
            .ai_auto_masonry {
                column-count: 2;
            }
            
            .ai_auto_timeline::after {
                left: 31px;
            }
            
            .ai_auto_timeline_item {
                width: 100%;
                padding-left: 70px;
                padding-right: 25px;
            }
            
            .ai_auto_timeline_item:nth-child(even) {
                left: 0;
            }
            
            .ai_auto_timeline_item::after {
                left: 21px;
            }
        }
        
        @media (max-width: 768px) {
            .ai_auto_masonry {
                column-count: 1;
            }
            
            .ai_auto_subscribe_form {
                flex-direction: column;
                gap: 15px;
            }
            
            .ai_auto_subscribe_input {
                border-radius: 50px;
            }
            
            .ai_auto_subscribe_btn {
                border-radius: 50px;
                padding: 0.75rem 1.5rem;
            }
        }