:root {
            --primary-color: #2c3e50;
            --accent-blue: #3498db;
            --accent-green: #27ae60;
            --accent-purple: #8e44ad;
            --light-gray: #f8f9fa;
            --medium-gray: #e9ecef;
            --dark-gray: #6c757d;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: #f8fafc;
            color: #333;
            line-height: 1.6;
        }
        
        /* 导航栏样式 */
        #ai_auto_navbar {
            background-color: var(--primary-color);
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            padding: 0.8rem 0;
        }
        
        .ai_auto_navbar-brand {
            font-size: 1.5rem;
            font-weight: 700;
            color: white !important;
            letter-spacing: 0.5px;
        }
        
        .ai_auto_navbar-brand span {
            color: var(--accent-green);
        }
        
        .ai_auto_nav-link {
            color: rgba(255,255,255,0.85) !important;
            font-weight: 500;
            margin: 0 0.5rem;
            transition: all 0.3s ease;
        }
        
        .ai_auto_nav-link:hover {
            color: white !important;
            transform: translateY(-2px);
        }
        
        .ai_auto_search-form {
            display: flex;
            max-width: 300px;
        }
        
        /* Banner区域 */
        #ai_auto_banner {
            background: linear-gradient(rgba(44, 62, 80, 0.9), rgba(44, 62, 80, 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;
            padding: 5rem 0;
            color: white;
            text-align: center;
            margin-bottom: 3rem;
        }
        
        .ai_auto_banner-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }
        
        .ai_auto_banner-desc {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 2rem;
            opacity: 0.9;
        }
        
        /* 文章展示区域 */
        #ai_auto_home-artice {
            padding: 3rem 0;
        }
        
        .ai_auto_section-title {
            position: relative;
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 2rem;
            padding-bottom: 0.75rem;
            color: var(--primary-color);
        }
        
        .ai_auto_section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 70px;
            height: 4px;
            background: var(--accent-green);
            border-radius: 2px;
        }
        
        /* 特色文章布局 - 时间线卡片列表模式 */
        #ai_auto_feature-article .ai_auto_article-card {
            border-left: 3px solid var(--accent-blue);
            border-radius: 0;
            margin-bottom: 2rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }
        
        #ai_auto_feature-article .ai_auto_article-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        
        #ai_auto_feature-article .ai_auto_article-header {
            background: linear-gradient(to right, var(--primary-color), #3a506b);
            color: white;
            padding: 0.75rem 1.25rem;
            font-weight: 500;
            font-size: 0.9rem;
        }
        
        #ai_auto_feature-article .ai_auto_article-body {
            display: flex;
            padding: 1.5rem;
        }
        
        #ai_auto_feature-article .ai_auto_article-img {
            flex: 0 0 200px;
            height: 150px;
            overflow: hidden;
            margin-right: 1.5rem;
            border-radius: 4px;
        }
        
        #ai_auto_feature-article .ai_auto_article-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        
        #ai_auto_feature-article .ai_auto_article-card:hover .ai_auto_article-img img {
            transform: scale(1.05);
        }
        
        #ai_auto_feature-article .ai_auto_article-title {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--primary-color);
        }
        
        #ai_auto_feature-article .ai_auto_article-title a {
            color: inherit;
            text-decoration: none;
        }
        
        #ai_auto_feature-article .ai_auto_article-title a:hover {
            color: var(--accent-blue);
        }
        
        #ai_auto_feature-article .ai_auto_article-desc {
            color: var(--dark-gray);
            margin-bottom: 1rem;
        }
        
        #ai_auto_feature-article .ai_auto_article-meta {
            display: flex;
            align-items: center;
            font-size: 0.9rem;
            color: var(--dark-gray);
        }
        
        #ai_auto_feature-article .ai_auto_article-author {
            font-weight: 600;
            margin-right: 1.5rem;
        }
        
        #ai_auto_feature-article .ai_auto_article-tags {
            display: flex;
            flex-wrap: wrap;
            margin-top: 0.5rem;
        }
        
        #ai_auto_feature-article .ai_auto_tag {
            background-color: var(--light-gray);
            color: var(--primary-color);
            font-size: 0.8rem;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
            text-decoration: none;
            transition: all 0.2s ease;
        }
        
        #ai_auto_feature-article .ai_auto_tag:hover {
            background-color: var(--accent-green);
            color: white;
        }
        
        /* 最近文章布局 - 卡片瀑布流 */
        #ai_auto_last-article {
            margin: 4rem 0;
        }
        
        #ai_auto_last-article .ai_auto_masonry-grid {
            column-count: 3;
            column-gap: 1.5rem;
        }
        
        @media (max-width: 992px) {
            #ai_auto_last-article .ai_auto_masonry-grid {
                column-count: 2;
            }
        }
        
        @media (max-width: 576px) {
            #ai_auto_last-article .ai_auto_masonry-grid {
                column-count: 1;
            }
        }
        
        #ai_auto_last-article .ai_auto_masonry-item {
            break-inside: avoid;
            margin-bottom: 1.5rem;
        }
        
        #ai_auto_last-article .ai_auto_article-card {
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            background: white;
            transition: all 0.3s ease;
        }
        
        #ai_auto_last-article .ai_auto_article-card:hover {
            transform: translateY(-7px);
            box-shadow: 0 12px 25px rgba(0,0,0,0.15);
        }
        
        #ai_auto_last-article .ai_auto_article-img {
            height: 200px;
            overflow: hidden;
        }
        
        #ai_auto_last-article .ai_auto_article-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        
        #ai_auto_last-article .ai_auto_article-card:hover .ai_auto_article-img img {
            transform: scale(1.1);
        }
        
        #ai_auto_last-article .ai_auto_article-body {
            padding: 1.5rem;
        }
        
        #ai_auto_last-article .ai_auto_article-date {
            font-size: 0.85rem;
            color: var(--accent-purple);
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        
        #ai_auto_last-article .ai_auto_article-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }
        
        #ai_auto_last-article .ai_auto_article-title a {
            color: var(--primary-color);
            text-decoration: none;
        }
        
        #ai_auto_last-article .ai_auto_article-title a:hover {
            color: var(--accent-blue);
        }
        
        #ai_auto_last-article .ai_auto_article-desc {
            color: var(--dark-gray);
            margin-bottom: 1rem;
            font-size: 0.95rem;
        }
        
        #ai_auto_last-article .ai_auto_article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.9rem;
            color: var(--dark-gray);
            border-top: 1px solid var(--medium-gray);
            padding-top: 0.75rem;
        }
        
        /* 推荐文章布局 - 图文背景融合卡 */
        #ai_auto_recommend-article {
            margin: 4rem 0;
        }
        
        #ai_auto_recommend-article .ai_auto_grid-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.8rem;
        }
        
        #ai_auto_recommend-article .ai_auto_article-card {
            height: 280px;
            border-radius: 8px;
            overflow: hidden;
            position: relative;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        #ai_auto_recommend-article .ai_auto_article-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-size: cover;
            background-position: center;
            transition: transform 0.5s ease;
        }
        
        #ai_auto_recommend-article .ai_auto_article-card:hover .ai_auto_article-bg {
            transform: scale(1.1);
        }
        
        #ai_auto_recommend-article .ai_auto_article-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(to top, rgba(44, 62, 80, 0.9), transparent);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 1.5rem;
            color: white;
            opacity: 1;
            transition: opacity 0.3s ease;
        }
        
        #ai_auto_recommend-article .ai_auto_article-card:hover .ai_auto_article-overlay {
            opacity: 1;
        }
        
        #ai_auto_recommend-article .ai_auto_article-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            line-height: 1.3;
        }
        
        #ai_auto_recommend-article .ai_auto_article-title a {
            color: white;
            text-decoration: none;
        }
        
        #ai_auto_recommend-article .ai_auto_article-meta {
            display: flex;
            align-items: center;
            font-size: 0.85rem;
            margin-bottom: 0.5rem;
            opacity: 0.9;
        }
        
        #ai_auto_recommend-article .ai_auto_article-author {
            margin-right: 1.5rem;
        }
        
        #ai_auto_recommend-article .ai_auto_article-tags {
            display: flex;
            flex-wrap: wrap;
            margin-top: 0.5rem;
        }
        
        #ai_auto_recommend-article .ai_auto_tag {
            background-color: rgba(255,255,255,0.2);
            color: white;
            font-size: 0.75rem;
            padding: 0.2rem 0.6rem;
            border-radius: 20px;
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
            text-decoration: none;
            transition: all 0.2s ease;
        }
        
        #ai_auto_recommend-article .ai_auto_tag:hover {
            background-color: var(--accent-green);
        }
        
        /* 订阅板块 */
        #ai_auto_subscribe {
            background: linear-gradient(to right, var(--primary-color), #3a506b);
            padding: 4rem 0;
            color: white;
            text-align: center;
        }
        
        .ai_auto_subscribe-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        
        .ai_auto_subscribe-desc {
            max-width: 700px;
            margin: 0 auto 2rem;
            font-size: 1.1rem;
            opacity: 0.9;
        }
        
        .ai_auto_subscribe-form {
            max-width: 500px;
            margin: 0 auto;
            display: flex;
        }
        
        .ai_auto_subscribe-input {
            flex: 1;
            padding: 0.8rem 1.2rem;
            border: none;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        
        .ai_auto_subscribe-btn {
            background-color: var(--accent-green);
            color: white;
            border: none;
            padding: 0 1.8rem;
            border-radius: 0 4px 4px 0;
            font-weight: 600;
            cursor: pointer;
            transition: background-color 0.3s ease;
        }
        
        .ai_auto_subscribe-btn:hover {
            background-color: #219653;
        }
        
        /* Footer区域 */
        #ai_auto_footer {
            background-color: var(--primary-color);
            color: rgba(255,255,255,0.8);
            padding-top: 4rem;
        }
        
        .ai_auto_footer-title {
            font-size: 1.25rem;
            font-weight: 600;
            color: white;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 0.75rem;
        }
        
        .ai_auto_footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background: var(--accent-green);
        }
        
        #ai_auto_footer_desc .ai_auto_site-desc {
            margin-top: 1rem;
            line-height: 1.7;
        }
        
        .ai_auto_footer-links {
            list-style: none;
            padding: 0;
        }
        
        .ai_auto_footer-links li {
            margin-bottom: 0.8rem;
        }
        
        .ai_auto_footer-links a {
            color: rgba(255,255,255,0.8);
            text-decoration: none;
            transition: all 0.3s ease;
        }
        
        .ai_auto_footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        
        .ai_auto_contact-item {
            display: flex;
            align-items: flex-start;
            margin-bottom: 1rem;
        }
        
        .ai_auto_contact-icon {
            margin-right: 0.8rem;
            color: var(--accent-green);
            min-width: 20px;
        }
        
        .ai_auto_copyright {
            background-color: rgba(0,0,0,0.2);
            padding: 1.5rem 0;
            margin-top: 3rem;
            text-align: center;
            font-size: 0.9rem;
        }
        
        /* 响应式调整 */
        @media (max-width: 768px) {
            .ai_auto_subscribe-form {
                flex-direction: column;
            }
            
            .ai_auto_subscribe-input {
                border-radius: 4px;
                margin-bottom: 0.5rem;
            }
            
            .ai_auto_subscribe-btn {
                border-radius: 4px;
                padding: 0.8rem;
            }
        }