:root {
            --ai_auto_primary: #2c7bb6;
            --ai_auto_secondary: #5aa0cc;
            --ai_auto_accent1: #00a896;
            --ai_auto_accent2: #f25f5c;
            --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, var(--ai_auto_primary) 0%, var(--ai_auto_secondary) 100%);
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            padding: 0.8rem 0;
        }
        
        .ai_auto_navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: white !important;
            letter-spacing: 1px;
        }
        
        .ai_auto_navbar-brand i {
            color: var(--ai_auto_accent2);
            margin-right: 8px;
        }
        
        .ai_auto_nav-link {
            color: rgba(255,255,255,0.85) !important;
            font-weight: 500;
            margin: 0 10px;
            transition: all 0.3s;
            position: relative;
        }
        
        .ai_auto_nav-link:hover {
            color: white !important;
        }
        
        .ai_auto_nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--ai_auto_accent1);
            transition: width 0.3s;
        }
        
        .ai_auto_nav-link:hover::after {
            width: 100%;
        }
        
        .ai_auto_search-form {
            position: relative;
        }
        
        .ai_auto_search-form input {
            border-radius: 30px;
            padding-left: 20px;
            border: none;
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
        }
        
        .ai_auto_search-form button {
            position: absolute;
            right: 10px;
            top: 50%;
            transform: translateY(-50%);
            background: var(--ai_auto_accent1);
            border: none;
            border-radius: 50%;
            width: 36px;
            height: 36px;
            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-1618005182384-a83a8bd57fbe?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2000&q=80');
            background-size: cover;
            background-position: center;
            padding: 100px 0;
            color: white;
            text-align: center;
            margin-bottom: 60px;
        }
        
        .ai_auto_banner-title {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }
        
        .ai_auto_banner-info {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 40px;
            opacity: 0.9;
        }
        
        .ai_auto_banner-search {
            max-width: 600px;
            margin: 0 auto;
        }
        
        .ai_auto_banner-search .form-control {
            border-radius: 50px;
            padding: 15px 25px;
            font-size: 1.1rem;
            border: none;
        }
        
        .ai_auto_banner-search .btn {
            position: absolute;
            right: 5px;
            top: 5px;
            bottom: 5px;
            border-radius: 50px;
            padding: 0 30px;
            background: var(--ai_auto_primary);
            font-weight: 600;
        }
        
        /* 文章板块通用样式 */
        #ai_auto_home-artice {
            padding-bottom: 60px;
        }
        
        .ai_auto_section-title {
            position: relative;
            margin-bottom: 40px;
            padding-bottom: 15px;
            font-weight: 700;
            color: var(--ai_auto_dark);
        }
        
        .ai_auto_section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 70px;
            height: 4px;
            background: var(--ai_auto_primary);
            border-radius: 2px;
        }
        
        .ai_auto_article-card {
            background: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            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(0,0,0,0.1);
        }
        
        .ai_auto_article-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        
        .ai_auto_article-card:hover .ai_auto_article-img {
            transform: scale(1.05);
        }
        
        .ai_auto_article-body {
            padding: 20px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        
        .ai_auto_article-title {
            font-weight: 700;
            font-size: 1.3rem;
            margin-bottom: 12px;
            color: var(--ai_auto_dark);
            transition: color 0.3s;
        }
        
        .ai_auto_article-title:hover {
            color: var(--ai_auto_primary);
            text-decoration: none;
        }
        
        .ai_auto_article-desc {
            color: #666;
            flex-grow: 1;
            margin-bottom: 15px;
        }
        
        .ai_auto_article-meta {
            color: #777;
            font-size: 0.9rem;
            margin-bottom: 15px;
        }
        
        .ai_auto_article-tags .badge {
            background-color: #e9f7fe;
            color: var(--ai_auto_primary);
            font-weight: 500;
            margin-right: 5px;
            margin-bottom: 5px;
            transition: all 0.3s;
        }
        
        .ai_auto_article-tags .badge:hover {
            background-color: var(--ai_auto_primary);
            color: white;
            text-decoration: none;
        }
        
        /* 特色文章 - 杂志式排版 */
        #ai_auto_feature-article {
            margin-bottom: 60px;
        }
        
        .ai_auto_magazine-left {
            height: 100%;
        }
        
        .ai_auto_magazine-left .ai_auto_article-card {
            height: 100%;
        }
        
        .ai_auto_magazine-left .ai_auto_article-img {
            height: 350px;
        }
        
        .ai_auto_magazine-right .ai_auto_article-card {
            margin-bottom: 30px;
        }
        
        .ai_auto_magazine-right .ai_auto_article-img {
            height: 150px;
        }
        
        /* 最近文章 - 时间线卡片列表 */
        #ai_auto_last-article {
            margin-bottom: 60px;
            position: relative;
        }
        
        .ai_auto_timeline-card {
            position: relative;
            padding-left: 30px;
            margin-bottom: 30px;
            border-left: 2px solid var(--ai_auto_primary);
        }
        
        .ai_auto_timeline-card::before {
            content: '';
            position: absolute;
            left: -10px;
            top: 0;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--ai_auto_primary);
            z-index: 2;
        }
        
        .ai_auto_timeline-date {
            background: var(--ai_auto_primary);
            color: white;
            padding: 8px 15px;
            border-radius: 4px;
            display: inline-block;
            margin-bottom: 15px;
            font-weight: 600;
        }
        
        .ai_auto_timeline-content {
            background: white;
            border-radius: 8px;
            padding: 20px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            display: flex;
        }
        
        .ai_auto_timeline-img {
            width: 200px;
            height: 150px;
            object-fit: cover;
            border-radius: 6px;
            margin-right: 20px;
            flex-shrink: 0;
        }
        
        .ai_auto_timeline-text {
            flex-grow: 1;
        }
        
        /* 推荐文章 - 瀑布流布局 */
        #ai_auto_recommend-article {
            margin-bottom: 60px;
        }
        
        .ai_auto_masonry-grid {
            column-count: 3;
            column-gap: 30px;
        }
        
        .ai_auto_masonry-item {
            break-inside: avoid;
            margin-bottom: 30px;
        }
        
        /* 订阅板块 */
        #ai_auto_subscribe {
            background: linear-gradient(135deg, var(--ai_auto_primary) 0%, var(--ai_auto_secondary) 100%);
            padding: 80px 0;
            color: white;
            text-align: center;
        }
        
        .ai_auto_subscribe-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 20px;
        }
        
        .ai_auto_subscribe-info {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 40px;
            opacity: 0.9;
        }
        
        .ai_auto_subscribe-form {
            max-width: 600px;
            margin: 0 auto;
        }
        
        .ai_auto_subscribe-form .form-control {
            border-radius: 50px;
            padding: 15px 25px;
            font-size: 1.1rem;
            border: none;
        }
        
        .ai_auto_subscribe-form .btn {
            border-radius: 50px;
            padding: 15px 30px;
            background: var(--ai_auto_accent1);
            font-weight: 600;
            margin-top: 20px;
            border: none;
        }
        
        /* Footer样式 */
        #ai_auto_footer {
            background: var(--ai_auto_dark);
            color: rgba(255,255,255,0.7);
            padding-top: 60px;
        }
        
        #ai_auto_footer a {
            color: rgba(255,255,255,0.7);
            text-decoration: none;
            transition: all 0.3s;
        }
        
        #ai_auto_footer a:hover {
            color: white;
        }
        
        .ai_auto_footer-title {
            color: white;
            font-weight: 600;
            margin-bottom: 20px;
            font-size: 1.2rem;
            position: relative;
            padding-bottom: 10px;
        }
        
        .ai_auto_footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 3px;
            background: var(--ai_auto_primary);
        }
        
        .ai_auto_footer-desc {
            margin-top: 20px;
            line-height: 1.6;
        }
        
        .ai_auto_footer-links li {
            margin-bottom: 10px;
        }
        
        .ai_auto_footer-contact li {
            margin-bottom: 12px;
            display: flex;
            align-items: flex-start;
        }
        
        .ai_auto_footer-contact i {
            margin-right: 10px;
            color: var(--ai_auto_primary);
            margin-top: 4px;
        }
        
        .ai_auto_copyright {
            background: rgba(0,0,0,0.3);
            padding: 20px 0;
            margin-top: 50px;
            text-align: center;
        }
        
        /* 响应式调整 */
        @media (max-width: 992px) {
            .ai_auto_masonry-grid {
                column-count: 2;
            }
            
            .ai_auto_timeline-content {
                flex-direction: column;
            }
            
            .ai_auto_timeline-img {
                width: 100%;
                margin-right: 0;
                margin-bottom: 15px;
            }
        }
        
        @media (max-width: 768px) {
            .ai_auto_masonry-grid {
                column-count: 1;
            }
            
            .ai_auto_banner-title {
                font-size: 2.5rem;
            }
        }