:root {
            --ai-primary: #2E8B57;
            --ai-secondary: #3CB371;
            --ai-accent1: #20B2AA;
            --ai-accent2: #4682B4;
            --ai-light: #F8F9FA;
            --ai-dark: #212529;
            --ai-gray: #6C757D;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            color: var(--ai-dark);
            background-color: #ffffff;
        }
        
        /* 导航栏样式 */
        #ai_auto_navbar {
            background-color: white;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            padding: 0.8rem 0;
        }
        
        .ai_navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--ai-primary);
            display: flex;
            align-items: center;
        }
        
        .ai_navbar-brand i {
            margin-right: 10px;
            color: var(--ai-accent2);
        }
        
        .ai_auto_nav-link {
            color: var(--ai-dark);
            font-weight: 500;
            padding: 0.5rem 1rem;
            transition: all 0.3s;
            border-radius: 4px;
        }
        
        .ai_auto_nav-link:hover {
            color: var(--ai-primary);
            background-color: rgba(46, 139, 87, 0.1);
        }
        
        .ai_search_form {
            position: relative;
        }
        
        .ai_search_input {
            border-radius: 30px;
            padding-left: 20px;
            border: 1px solid var(--ai-accent1);
        }
        
        .ai_search_btn {
            position: absolute;
            right: 5px;
            top: 5px;
            border-radius: 50%;
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--ai-accent1);
            border: none;
            color: white;
        }
        
        /* Banner 样式 */
        #ai_auto_banner {
            background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), 
                        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: 120px 0;
            color: white;
            margin-bottom: 60px;
        }
        
        .ai_banner_title {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 20px;
            color: white;
        }
        
        .ai_banner_desc {
            font-size: 1.3rem;
            margin-bottom: 40px;
            max-width: 700px;
        }
        
        .ai_banner_search {
            max-width: 700px;
        }
        
        .ai_banner_search .form-control {
            height: 60px;
            border-radius: 8px 0 0 8px;
            font-size: 1.1rem;
            border: none;
        }
        
        .ai_banner_search .btn {
            height: 60px;
            border-radius: 0 8px 8px 0;
            background: var(--ai-accent1);
            border: none;
            font-size: 1.1rem;
            padding: 0 30px;
        }
        
        /* 文章区域通用样式 */
        #ai_auto_home-artice {
            margin-bottom: 80px;
        }
        
        .ai_section_title {
            position: relative;
            font-weight: 700;
            margin-bottom: 30px;
            padding-bottom: 15px;
            color: var(--ai-primary);
            font-size: 2rem;
        }
        
        .ai_section_title:after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background: var(--ai-accent1);
            border-radius: 2px;
        }
        
        .ai_article_card {
            border-radius: 8px;
            overflow: hidden;
            /*height: 120px;*/
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            background: white;
        }
        
        .ai_article_card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .ai_article_img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            display: block;
        }
        
        .ai_article_content {
            padding: 20px;
        }
        
        .ai_article_title {
            font-weight: 700;
            font-size: 1.3rem;
            margin-bottom: 12px;
            color: var(--ai-dark);
            text-decoration: none;
            display: block;
        }
        
        .ai_article_title:hover {
            color: var(--ai-primary);
        }
        
        .ai_article_desc {
            color: var(--ai-gray);
            margin-bottom: 15px;
            font-size: 0.95rem;
        }
        
        .ai_article_meta {
            display: flex;
            justify-content: space-between;
            font-size: 0.85rem;
            color: var(--ai-gray);
            margin-bottom: 15px;
            border-bottom: 1px solid rgba(0,0,0,0.05);
            padding-bottom: 10px;
        }
        
        .ai_article_tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 10px;
        }
        
        .ai_tag {
            background: rgba(46, 139, 87, 0.1);
            color: var(--ai-primary);
            padding: 4px 10px;
            border-radius: 30px;
            font-size: 0.8rem;
            text-decoration: none;
            transition: all 0.3s;
        }
        
        .ai_tag:hover {
            background: var(--ai-primary);
            color: white;
        }
        
        /* 特色文章样式 - 单列时间线卡片列表 */
        #ai_auto_feature-article .ai_article_item {
            margin-bottom: 40px;
            position: relative;
            padding-left: 60px;
        }
        
        #ai_auto_feature-article .ai_article_item:before {
            content: "";
            position: absolute;
            left: 15px;
            top: 0;
            height: 100%;
            width: 3px;
            background: var(--ai-accent1);
        }
        
        #ai_auto_feature-article .ai_date_badge {
            position: absolute;
            left: 0;
            top: 0;
            background: var(--ai-accent1);
            color: white;
            padding: 10px 15px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 1.1rem;
            z-index: 2;
        }
        
        #ai_auto_feature-article .ai_article_card {
            border-left: 3px solid var(--ai-primary);
            box-shadow: 5px 5px 15px rgba(0, 0, 0, 0.05);
        }
        
        #ai_auto_feature-article .ai_article_content {
            display: flex;
            padding: 0;
        }
        
        #ai_auto_feature-article .ai_article_img_wrap {
            flex: 0 0 40%;
        }
        
        #ai_auto_feature-article .ai_article_img {
            height: 300px;
            border-radius: 0;
        }
        
        #ai_auto_feature-article .ai_article_text {
            flex: 0 0 60%;
            padding: 25px;
        }
        
        /* 最近文章样式 - 杂志式排版 */
        #ai_auto_last-article {
            margin: 80px 0;
        }
        
        #ai_auto_last-article .ai_main_article {
            height: 700px;
            position: relative;
            border-radius: 8px;
            overflow: hidden;
            margin-bottom: 30px;
        }
        
        #ai_auto_last-article .ai_main_img {
            height: 100%;
            width: 100%;
            object-fit: cover;
        }
        
        #ai_auto_last-article .ai_main_content {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 30px;
            background: linear-gradient(transparent, rgba(0,0,0,0.8));
            color: white;
        }
        
        #ai_auto_last-article .ai_main_title {
            font-size: 1.8rem;
            font-weight: 700;
            color: white;
            margin-bottom: 15px;
        }
        
        #ai_auto_last-article .ai_side_articles .ai_article_card {
            margin-bottom: 25px;
        }
        
        #ai_auto_last-article .ai_side_articles .ai_article_img {
            height: 200px;
        }
        
        /* 推荐文章样式 - 文案列表展示 */
        #ai_auto_recommend-article .ai_article_list_item {
            border-bottom: 1px solid rgba(0,0,0,0.1);
            padding: 25px 0;
        }
        
        #ai_auto_recommend-article .ai_article_list_item:last-child {
            border-bottom: none;
        }
        
        #ai_auto_recommend-article .ai_article_content {
            display: flex;
            padding: 0;
        }
        
        #ai_auto_recommend-article .ai_article_img_wrap {
            flex: 0 0 35%;
            margin-right: 20px;
        }
        
        #ai_auto_recommend-article .ai_article_img {
            height: 160px;
            border-radius: 8px;
        }
        
        #ai_auto_recommend-article .ai_article_text {
            flex: 1;
            padding: 5px 0;
        }
        
        /* 订阅板块样式 */
        #ai_auto_subscribe {
            background: linear-gradient(to right, var(--ai-primary), var(--ai-accent2));
            padding: 80px 0;
            color: white;
            margin-bottom: 80px;
        }
        
        .ai_subscribe_title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 20px;
        }
        
        .ai_subscribe_desc {
            font-size: 1.2rem;
            margin-bottom: 30px;
            opacity: 0.9;
        }
        
        .ai_subscribe_form {
            max-width: 600px;
            margin: 0 auto;
        }
        
        .ai_subscribe_form .form-control {
            height: 60px;
            border-radius: 8px 0 0 8px;
            border: none;
            font-size: 1.1rem;
        }
        
        .ai_subscribe_form .btn {
            height: 60px;
            border-radius: 0 8px 8px 0;
            background: var(--ai-accent1);
            border: none;
            font-size: 1.1rem;
            padding: 0 30px;
        }
        
        /* Footer 样式 */
        #ai_auto_footer {
            background: var(--ai-dark);
            color: rgba(255,255,255,0.7);
            padding-top: 60px;
        }
        
        .ai_footer_title {
            color: white;
            font-weight: 600;
            font-size: 1.2rem;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .ai_footer_title:after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 2px;
            background: var(--ai-accent1);
        }
        
        .ai_footer_desc {
            margin-bottom: 20px;
            font-size: 0.95rem;
            line-height: 1.7;
        }
        
        .ai_footer_list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        
        .ai_footer_list li {
            margin-bottom: 12px;
        }
        
        .ai_footer_list a {
            color: rgba(255,255,255,0.7);
            text-decoration: none;
            transition: all 0.3s;
            font-size: 0.95rem;
        }
        
        .ai_footer_list a:hover {
            color: white;
            padding-left: 5px;
        }
        
        .ai_footer_contact li {
            display: flex;
            align-items: flex-start;
        }
        
        .ai_footer_contact i {
            margin-right: 10px;
            color: var(--ai-accent1);
            margin-top: 5px;
        }
        
        .ai_copyright {
            background: rgba(0,0,0,0.2);
            padding: 20px 0;
            margin-top: 50px;
            text-align: center;
            font-size: 0.9rem;
        }
        
        /* 响应式调整 */
        @media (max-width: 992px) {
            .ai_banner_title {
                font-size: 2.5rem;
            }
            
            #ai_auto_feature-article .ai_article_content {
                flex-direction: column;
            }
            
            #ai_auto_feature-article .ai_article_img_wrap {
                flex: 0 0 100%;
            }
        }
        
        @media (max-width: 768px) {
            .ai_banner_title {
                font-size: 2rem;
            }
            
            .ai_banner_desc {
                font-size: 1.1rem;
            }
            
            .ai_section_title {
                font-size: 1.7rem;
            }
            
            #ai_auto_last-article .ai_main_content {
                position: relative;
                background: transparent;
                color: var(--ai-dark);
                padding: 20px 0;
            }
            
            #ai_auto_last-article .ai_main_title {
                color: var(--ai-dark);
            }
            
            #ai_auto_recommend-article .ai_article_content {
                flex-direction: column;
            }
            
            #ai_auto_recommend-article .ai_article_img_wrap {
                margin-right: 0;
                margin-bottom: 15px;
            }
        }