:root {
            --ai_auto-primary: #1a365d;
            --ai_auto-secondary: #48bb78;
            --ai_auto-accent: #e53e3e;
            --ai_auto-highlight: #f6ad55;
            --ai_auto-light: #f8f9fa;
            --ai_auto-dark: #212529;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: #f5f7fa;
            color: var(--ai_auto-dark);
        }
        
        /* 导航条样式 */
        #ai_auto_navbar {
            background-color: white;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            padding: 15px 0;
        }
        
        .ai_auto_navbar-brand {
            color: var(--ai_auto-primary);
            font-weight: 700;
            font-size: 1.8rem;
            display: flex;
            align-items: center;
        }
        
        .ai_auto_navbar-brand i {
            margin-right: 10px;
            color: var(--ai_auto-accent);
        }
        
        .ai_auto_nav-link {
            color: var(--ai_auto-dark);
            font-weight: 500;
            margin: 0 10px;
            position: relative;
        }
        
        .ai_auto_nav-link:hover, .ai_auto_nav-link.active {
            color: var(--ai_auto-primary);
        }
        
        .ai_auto_nav-link:hover::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 100%;
            height: 3px;
            background-color: var(--ai_auto-accent);
        }
        
        .ai_auto_search-form {
            position: relative;
        }
        
        .ai_auto_search-input {
            border-radius: 50px;
            padding-left: 45px;
            border: 2px solid #e2e8f0;
        }
        
        .ai_auto_search-icon {
            position: absolute;
            left: 20px;
            top: 12px;
            color: var(--ai_auto-primary);
        }
        
        /* Banner样式 */
        #ai_auto_banner {
            background: linear-gradient(rgba(26, 54, 93, 0.85), rgba(26, 54, 93, 0.95)), 
                        url('https://images.unsplash.com/photo-1532094349884-543bc11b234d?auto=format&fit=crop&w=1950') no-repeat center;
            background-size: cover;
            color: white;
            padding: 100px 0;
            text-align: center;
        }
        
        .ai_auto_banner-title {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 20px;
            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 40px;
            opacity: 0.9;
        }
        
        .ai_auto_banner-search {
            max-width: 700px;
            margin: 0 auto;
        }
        
        .ai_auto_banner-search .form-control {
            padding: 20px 25px;
            border-radius: 50px;
            font-size: 1.1rem;
            border: none;
        }
        
        .ai_auto_banner-search .btn {
            position: absolute;
            right: 7px;
            top: 7px;
            padding: 13px 30px;
            border-radius: 50px;
            background-color: var(--ai_auto-accent);
            color: white;
            font-weight: 600;
            border: none;
            transition: all 0.3s;
        }
        
        .ai_auto_banner-search .btn:hover {
            background-color: #c53030;
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.2);
        }
        
        /* 文章板块通用样式 */
        #ai_auto_home-artice {
            padding: 80px 0;
        }
        
        .ai_auto_section-title {
            position: relative;
            margin-bottom: 40px;
            padding-bottom: 15px;
            text-align: center;
            color: var(--ai_auto-primary);
            font-weight: 700;
        }
        
        .ai_auto_section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            /*width: 80px;*/
            height: 4px;
            background-color: var(--ai_auto-accent);
            border-radius: 2px;
        }
        
        .ai_auto_article-card {
            background: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            transition: all 0.3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        
        .ai_auto_article-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        
        .ai_auto_article-img {
            height: 220px;
            width: 100%;
            object-fit: cover;
            display: block;
        }
        
        .ai_auto_article-body {
            padding: 25px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        
        .ai_auto_article-title {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 15px;
            color: var(--ai_auto-primary);
        }
        
        .ai_auto_article-title a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s;
        }
        
        .ai_auto_article-title a:hover {
            color: var(--ai_auto-accent);
        }
        
        .ai_auto_article-desc {
            color: #666;
            margin-bottom: 20px;
            flex-grow: 1;
        }
        
        .ai_auto_article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: #777;
            font-size: 0.9rem;
            margin-top: 15px;
        }
        
        .ai_auto_article-author {
            font-weight: 500;
        }
        
        .ai_auto_article-labels {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 15px;
        }
        
        .ai_auto_label {
            background-color: #e2e8f0;
            color: var(--ai_auto-primary);
            font-size: 0.8rem;
            padding: 4px 12px;
            border-radius: 20px;
            text-decoration: none;
            transition: all 0.2s;
        }
        
        .ai_auto_label:hover {
            background-color: var(--ai_auto-primary);
            color: white;
        }
        
        /* 特色文章样式 - 卡片堆叠式布局 */
        #ai_auto_feature-article .ai_auto_article-card {
            position: relative;
            border: 3px solid var(--ai_auto-highlight);
        }
        
        #ai_auto_feature-article .ai_auto_article-img {
            height: 250px;
        }
        
        #ai_auto_feature-article .ai_auto_featured-badge {
            position: absolute;
            top: 15px;
            right: 15px;
            background: var(--ai_auto-accent);
            color: white;
            padding: 5px 15px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 600;
            z-index: 1;
        }
        
        /* 最近文章样式 - 时间轴式布局 */
        #ai_auto_last-article {
            margin-top: 80px;
        }
        
        #ai_auto_last-article .ai_auto_timeline-container {
            position: relative;
            padding-left: 30px;
        }
        
        #ai_auto_last-article .ai_auto_timeline-container::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            height: 100%;
            width: 4px;
            background-color: var(--ai_auto-secondary);
        }
        
        #ai_auto_last-article .ai_auto_article-card {
            margin-bottom: 30px;
            box-shadow: none;
            border-left: 4px solid var(--ai_auto-secondary);
        }
        
        #ai_auto_last-article .ai_auto_article-img {
            height: 180px;
        }
        
        #ai_auto_last-article .ai_auto_article-date {
            background: var(--ai_auto-secondary);
            color: white;
            padding: 5px 15px;
            border-radius: 30px;
            display: inline-block;
            margin-bottom: 10px;
            font-size: 0.9rem;
        }
        
        /* 推荐文章样式 - 网格+卡片动效 */
        #ai_auto_recommend-article {
            margin-top: 80px;
        }
        
        #ai_auto_recommend-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 30px;
        }
        
        #ai_auto_recommend-article .ai_auto_article-card {
            border-top: 5px solid var(--ai_auto-highlight);
        }
        
        /* 订阅板块样式 */
        #ai_auto_subscribe {
            background: linear-gradient(to right, var(--ai_auto-primary), #2c5282);
            color: white;
            padding: 80px 0;
            text-align: center;
        }
        
        .ai_auto_subscribe-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 20px;
        }
        
        .ai_auto_subscribe-desc {
            font-size: 1.1rem;
            max-width: 700px;
            margin: 0 auto 40px;
            opacity: 0.9;
        }
        
        .ai_auto_subscribe-form {
            max-width: 600px;
            margin: 0 auto;
        }
        
        .ai_auto_subscribe-input {
            padding: 18px 25px;
            border-radius: 50px 0 0 50px;
            border: none;
            font-size: 1.1rem;
        }
        
        .ai_auto_subscribe-btn {
            padding: 18px 35px;
            border-radius: 0 50px 50px 0;
            background-color: var(--ai_auto-accent);
            color: white;
            font-weight: 600;
            border: none;
            transition: all 0.3s;
        }
        
        .ai_auto_subscribe-btn:hover {
            background-color: #c53030;
        }
        
        /* Footer样式 */
        #ai_auto_footer {
            background-color: #1a202c;
            color: #a0aec0;
            padding-top: 80px;
        }
        
        .ai_auto_footer-title {
            color: white;
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .ai_auto_footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 3px;
            background-color: var(--ai_auto-accent);
        }
        
        .ai_auto_footer-desc {
            margin-top: 20px;
            line-height: 1.7;
        }
        
        .ai_auto_footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        
        .ai_auto_footer-links li {
            margin-bottom: 12px;
        }
        
        .ai_auto_footer-links a {
            color: #a0aec0;
            text-decoration: none;
            transition: all 0.2s;
            display: inline-block;
        }
        
        .ai_auto_footer-links a:hover {
            color: white;
            transform: translateX(5px);
        }
        
        .ai_auto_footer-contact li {
            display: flex;
            align-items: flex-start;
            margin-bottom: 15px;
        }
        
        .ai_auto_footer-contact i {
            margin-right: 12px;
            color: var(--ai_auto-secondary);
            font-size: 1.2rem;
            margin-top: 3px;
        }
        
        .ai_auto_copyright {
            background-color: rgba(0, 0, 0, 0.2);
            padding: 20px 0;
            margin-top: 60px;
            text-align: center;
        }
        
        /* 响应式调整 */
        @media (max-width: 992px) {
            .ai_auto_banner-title {
                font-size: 2.8rem;
            }
            
            .ai_auto_subscribe-title {
                font-size: 2rem;
            }
        }
        
        @media (max-width: 768px) {
            .ai_auto_banner-title {
                font-size: 2.3rem;
            }
            
            .ai_auto_banner-desc {
                font-size: 1rem;
            }
            
            .ai_auto_section-title {
                font-size: 1.8rem;
            }
            
            .ai_auto_article-title {
                font-size: 1.2rem;
            }
            
            .ai_auto_subscribe-title {
                font-size: 1.8rem;
            }
            
            #ai_auto_footer .col-md-3 {
                margin-bottom: 40px;
            }
        }