:root {
            --primary-color: #1a3c8f;
            --secondary-color: #4a90e2;
            --accent-color1: #50e3c2;
            --accent-color2: #f5a623;
            --dark-bg: #0d1b2a;
            --light-bg: #f8f9fa;
            --text-dark: #1e293b;
            --text-light: #f1f5f9;
        }
        
        body {
            font-family: 'Georgia', serif;
            background-color: #f5f7fa;
            color: var(--text-dark);
            line-height: 1.6;
        }
        
        /* 导航条样式 */
        #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 {
            color: white !important;
            font-weight: 700;
            font-size: 1.5rem;
            letter-spacing: 0.5px;
        }
        
        .ai_auto_nav-link {
            color: rgba(255,255,255,0.85) !important;
            font-weight: 500;
            transition: all 0.3s ease;
            padding: 0.5rem 1rem !important;
        }
        
        .ai_auto_nav-link:hover {
            color: white !important;
            background-color: rgba(255,255,255,0.1);
            border-radius: 4px;
        }
        
        .ai_auto_search-form .form-control {
            border-radius: 30px 0 0 30px;
            border: none;
            padding: 0.5rem 1.25rem;
        }
        
        .ai_auto_search-form .btn {
            border-radius: 0 30px 30px 0;
            background-color: var(--accent-color2);
            color: white;
            border: none;
        }
        
        /* Banner样式 */
        #ai_auto_banner {
            background: linear-gradient(rgba(26, 60, 143, 0.85), rgba(26, 60, 143, 0.9)), url('https://images.unsplash.com/photo-1579546929662-711aa81148cf?ixlib=rb-4.0.3&auto=format&fit=crop&w=1950&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 5rem 0;
            margin-bottom: 3rem;
        }
        
        .ai_auto_banner-title {
            font-size: 3.2rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }
        
        .ai_auto_banner-desc {
            font-size: 1.3rem;
            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 1.5rem;
            font-size: 1.1rem;
            border-radius: 50px;
            border: none;
        }
        
        .ai_auto_banner-search .btn {
            position: absolute;
            right: 5px;
            top: 5px;
            bottom: 5px;
            border-radius: 50px;
            background: var(--accent-color1);
            color: var(--text-dark);
            font-weight: 600;
            padding: 0 1.5rem;
        }
        
        /* 文章板块通用样式 */
        #ai_auto_home-artice {
            padding: 3rem 0;
        }
        
        .ai_auto_section-title {
            position: relative;
            padding-bottom: 1rem;
            margin-bottom: 2rem;
            font-weight: 700;
            color: var(--primary-color);
        }
        
        .ai_auto_section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background: var(--accent-color1);
            border-radius: 2px;
        }
        
        /* 特色文章 - 杂志式排版 */
        #ai_auto_feature-article {
            margin-bottom: 4rem;
        }
        
        .ai_auto_feature-main {
            position: relative;
            height: 100%;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            transition: transform 0.3s ease;
        }
        
        .ai_auto_feature-main:hover {
            transform: translateY(-5px);
        }
        
        .ai_auto_feature-main-img {
            height: 100%;
            width: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        
        .ai_auto_feature-main:hover .ai_auto_feature-main-img {
            transform: scale(1.05);
        }
        
        .ai_auto_feature-main-content {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(transparent, rgba(0,0,0,0.8));
            color: white;
            padding: 2rem;
        }
        
        .ai_auto_feature-main-title {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        
        .ai_auto_feature-list {
            height: 100%;
        }
        
        .ai_auto_feature-item {
            display: flex;
            margin-bottom: 1.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid rgba(0,0,0,0.1);
        }
        
        .ai_auto_feature-item:last-child {
            margin-bottom: 0;
            padding-bottom: 0;
            border-bottom: none;
        }
        
        .ai_auto_feature-img {
            width: 120px;
            height: 100px;
            object-fit: cover;
            border-radius: 6px;
            margin-right: 1.2rem;
        }
        
        .ai_auto_feature-content {
            flex: 1;
        }
        
        .ai_auto_feature-tag {
            display: inline-block;
            background: var(--accent-color1);
            color: var(--text-dark);
            font-size: 0.75rem;
            padding: 0.2rem 0.7rem;
            border-radius: 20px;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        
        /* 最近文章 - 单列时间线卡片列表 */
        #ai_auto_last-article {
            margin-bottom: 4rem;
            padding: 3rem 0;
            background-color: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        
        .ai_auto_timeline-card {
            position: relative;
            padding-left: 30px;
            border-left: 2px solid var(--accent-color1);
            margin-bottom: 2.5rem;
        }
        
        .ai_auto_timeline-card:last-child {
            margin-bottom: 0;
        }
        
        .ai_auto_timeline-date {
            position: absolute;
            left: -60px;
            top: 0;
            background: var(--primary-color);
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            font-weight: 600;
            text-align: center;
            width: 90px;
        }
        
        .ai_auto_timeline-content {
            display: flex;
            background: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            transition: transform 0.3s ease;
        }
        
        .ai_auto_timeline-content:hover {
            transform: translateY(-5px);
        }
        
        .ai_auto_timeline-img {
            width: 240px;
            height: 200px;
            object-fit: cover;
        }
        
        .ai_auto_timeline-body {
            padding: 1.5rem;
            flex: 1;
        }
        
        .ai_auto_timeline-title {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
        }
        
        .ai_auto_timeline-desc {
            color: #555;
            margin-bottom: 1.2rem;
        }
        
        .ai_auto_timeline-author {
            display: flex;
            align-items: center;
            font-size: 0.9rem;
            color: #666;
        }
        
        .ai_auto_timeline-author i {
            margin-right: 0.5rem;
            color: var(--accent-color2);
        }
        
        .ai_auto_timeline-tags {
            margin-top: 1rem;
        }
        
        .ai_auto_tag {
            display: inline-block;
            background: rgba(26, 60, 143, 0.1);
            color: var(--primary-color);
            font-size: 0.8rem;
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
            transition: all 0.3s ease;
        }
        
        .ai_auto_tag:hover {
            background: var(--primary-color);
            color: white;
            text-decoration: none;
        }
        
        /* 推荐文章 - 图文背景融合卡 */
        #ai_auto_recommend-article {
            margin-bottom: 3rem;
        }
        
        .ai_auto_fusion-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 2rem;
        }
        
        .ai_auto_fusion-card {
            position: relative;
            height: 300px;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        
        .ai_auto_fusion-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        
        .ai_auto_fusion-content {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(0,0,0,0.7);
            color: white;
            padding: 1.5rem;
            transform: translateY(100px);
            transition: transform 0.4s ease;
            opacity: 0.7;
        }
        
        .ai_auto_fusion-card:hover .ai_auto_fusion-content {
            transform: translateY(0);
            opacity: 1;
        }
        
        .ai_auto_fusion-card:hover .ai_auto_fusion-img {
            transform: scale(1.05);
        }
        
        .ai_auto_fusion-title {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
        }
        
        .ai_auto_fusion-author {
            font-size: 0.9rem;
            opacity: 0.8;
            margin-bottom: 0.5rem;
        }
        
        .ai_auto_fusion-date {
            font-size: 0.85rem;
            opacity: 0.7;
        }
        
        /* 订阅板块 */
        #ai_auto_subscribe {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            padding: 5rem 0;
            color: white;
            margin-top: 2rem;
        }
        
        .ai_auto_subscribe-title {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        
        .ai_auto_subscribe-desc {
            font-size: 1.1rem;
            max-width: 700px;
            margin: 0 auto 2rem;
            opacity: 0.9;
        }
        
        .ai_auto_subscribe-form {
            max-width: 600px;
            margin: 0 auto;
        }
        
        .ai_auto_subscribe-form .form-control {
            padding: 1rem 1.5rem;
            font-size: 1.1rem;
            border-radius: 50px;
            border: none;
        }
        
        .ai_auto_subscribe-form .btn {
            position: absolute;
            right: 5px;
            top: 5px;
            bottom: 5px;
            border-radius: 50px;
            background: var(--accent-color1);
            color: var(--text-dark);
            font-weight: 600;
            padding: 0 1.5rem;
        }
        
        /* Footer样式 */
        #ai_auto_footer {
            background: var(--dark-bg);
            color: var(--text-light);
            padding-top: 4rem;
        }
        
        #ai_auto_footer_desc h3 {
            color: white;
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        
        #ai_auto_footer_desc p {
            opacity: 0.7;
            line-height: 1.8;
        }
        
        .ai_auto_footer-heading {
            color: white;
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 0.5rem;
        }
        
        .ai_auto_footer-heading:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 2px;
            background: var(--accent-color1);
        }
        
        .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(255,255,255,0.7);
            text-decoration: none;
            transition: all 0.3s ease;
        }
        
        .ai_auto_footer-links a:hover {
            color: var(--accent-color1);
            padding-left: 5px;
        }
        
        .ai_auto_contact-item {
            display: flex;
            margin-bottom: 1rem;
        }
        
        .ai_auto_contact-icon {
            width: 40px;
            height: 40px;
            background: rgba(255,255,255,0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 1rem;
            color: var(--accent-color1);
        }
        
        #ai_auto_footer_copyright {
            background: rgba(0,0,0,0.2);
            text-align: center;
            padding: 1.5rem 0;
            margin-top: 3rem;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.6);
        }
        
        /* 响应式调整 */
        @media (max-width: 992px) {
            .ai_auto_timeline-content {
                flex-direction: column;
            }
            
            .ai_auto_timeline-img {
                width: 100%;
                height: 200px;
            }
            
            .ai_auto_timeline-date {
                position: static;
                margin-bottom: 1rem;
                width: auto;
                display: inline-block;
            }
            
            .ai_auto_timeline-card {
                padding-left: 0;
                border-left: none;
                padding-top: 20px;
                border-top: 2px solid var(--accent-color1);
            }
        }
        
        @media (max-width: 768px) {
            .ai_auto_banner-title {
                font-size: 2.5rem;
            }
            
            .ai_auto_subscribe-title {
                font-size: 1.8rem;
            }
        }