:root {
            --primary-color: #2E7D32;
            --secondary-color: #00695C;
            --accent-color: #1B5E20;
            --light-green: #4CAF50;
            --dark-green: #1B5E20;
            --light-gray: #f8f9fa;
            --medium-gray: #e9ecef;
            --text-dark: #212529;
        }
        
        body {
            font-family: 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            color: var(--text-dark);
            background-color: #ffffff;
        }
        
        /* 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;
            font-weight: 700;
            font-size: 1.5rem;
            letter-spacing: 0.5px;
        }
        
        .ai_auto_navbar-brand:hover {
            color: white;
        }
        
        .ai_auto_nav-link {
            color: rgba(255,255,255,0.85);
            font-weight: 500;
            padding: 0.5rem 1rem;
            transition: all 0.3s ease;
            border-radius: 4px;
        }
        
        .ai_auto_nav-link:hover {
            color: white;
            background-color: rgba(255,255,255,0.1);
        }
        
        .ai_auto_search-form {
            position: relative;
            margin-left: 1rem;
        }
        
        .ai_auto_search-input {
            background-color: rgba(255,255,255,0.15);
            border: none;
            border-radius: 50px;
            padding: 0.5rem 1rem 0.5rem 3rem;
            color: white;
            transition: all 0.3s ease;
            width: 250px;
        }
        
        .ai_auto_search-input::placeholder {
            color: rgba(255,255,255,0.7);
        }
        
        .ai_auto_search-input:focus {
            background-color: rgba(255,255,255,0.25);
            box-shadow: none;
            width: 300px;
        }
        
        .ai_auto_search-icon {
            position: absolute;
            left: 1rem;
            top: 50%;
            transform: translateY(-50%);
            color: rgba(255,255,255,0.7);
        }
        
        /* Banner样式 */
        #ai_auto_banner {
            background: linear-gradient(rgba(46, 125, 50, 0.9), rgba(27, 94, 32, 0.8)), 
                        url('https://images.unsplash.com/photo-1517134191118-9d595e4c8c2b?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
            background-size: cover;
            background-position: center;
            padding: 6rem 0;
            color: white;
            text-align: center;
            margin-bottom: 4rem;
        }
        
        .ai_auto_banner-title {
            font-size: 3rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }
        
        .ai_auto_banner-info {
            font-size: 1.25rem;
            max-width: 700px;
            margin: 0 auto 2.5rem;
            opacity: 0.9;
        }
        
        .ai_auto_banner-search {
            max-width: 600px;
            margin: 0 auto;
        }
        
        .ai_auto_banner-search .form-control {
            padding: 1rem;
            border-radius: 50px;
            border: none;
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
        }
        
        .ai_auto_banner-search .btn {
            position: absolute;
            right: 5px;
            top: 5px;
            bottom: 5px;
            border-radius: 50px;
            padding: 0 1.5rem;
            background-color: var(--accent-color);
            border: none;
        }
        
        /* 文章板块通用样式 */
        .ai_auto_section-title {
            font-weight: 700;
            margin-bottom: 1.5rem;
            color: var(--primary-color);
            position: relative;
            padding-bottom: 0.75rem;
        }
        
        .ai_auto_section-title:after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 70px;
            height: 4px;
            background: var(--primary-color);
            border-radius: 2px;
        }
        
        .ai_auto_section-subtitle {
            color: #6c757d;
            margin-bottom: 2.5rem;
        }
        
        /* 特色文章 - 单列时间线卡片 */
        #ai_auto_feature-article {
            margin-bottom: 5rem;
        }
        
        .ai_auto_timeline-card {
            border-left: 3px solid var(--primary-color);
            padding-left: 1.5rem;
            margin-bottom: 3rem;
            position: relative;
        }
        
        .ai_auto_timeline-card:before {
            content: '';
            position: absolute;
            left: -8px;
            top: 0;
            width: 16px;
            height: 16px;
            background: var(--primary-color);
            border-radius: 50%;
        }
        
        .ai_auto_timeline-date {
            background-color: var(--primary-color);
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            display: inline-block;
            margin-bottom: 1rem;
            font-weight: 600;
        }
        
        .ai_auto_timeline-content {
            display: flex;
            gap: 1.5rem;
        }
        
        .ai_auto_timeline-img {
            flex: 0 0 35%;
            border-radius: 8px;
            overflow: hidden;
            height: 200px;
        }
        
        .ai_auto_timeline-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }
        
        .ai_auto_timeline-img:hover img {
            transform: scale(1.05);
        }
        
        .ai_auto_timeline-text {
            flex: 1;
        }
        
        .ai_auto_timeline-title {
            font-weight: 700;
            font-size: 1.5rem;
            margin-bottom: 0.75rem;
            color: var(--text-dark);
        }
        
        .ai_auto_timeline-desc {
            color: #6c757d;
            margin-bottom: 1rem;
        }
        
        .ai_auto_timeline-meta {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            color: #6c757d;
            font-size: 0.9rem;
        }
        
        .ai_auto_timeline-labels {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
            margin-top: 1rem;
        }
        
        .ai_auto_label {
            background-color: var(--light-gray);
            color: var(--primary-color);
            padding: 0.25rem 0.75rem;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
        }
        
        .ai_auto_label:hover {
            background-color: var(--primary-color);
            color: white;
        }
        
        /* 最近文章 - 卡片瀑布流布局 */
        #ai_auto_last-article {
            margin-bottom: 5rem;
        }
        
        .ai_auto_masonry-grid {
            column-count: 3;
            column-gap: 1.5rem;
        }
        
        .ai_auto_masonry-item {
            break-inside: avoid;
            margin-bottom: 1.5rem;
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        
        .ai_auto_masonry-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0,0,0,0.1);
        }
        
        .ai_auto_masonry-img {
            height: 200px;
            overflow: hidden;
        }
        
        .ai_auto_masonry-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        
        .ai_auto_masonry-img:hover img {
            transform: scale(1.1);
        }
        
        .ai_auto_masonry-body {
            padding: 1.5rem;
        }
        
        .ai_auto_masonry-title {
            font-weight: 700;
            font-size: 1.25rem;
            margin-bottom: 0.75rem;
            color: var(--text-dark);
        }
        
        .ai_auto_masonry-meta {
            display: flex;
            justify-content: space-between;
            color: #6c757d;
            font-size: 0.9rem;
            margin-bottom: 0.75rem;
        }
        
        .ai_auto_masonry-desc {
            color: #6c757d;
            margin-bottom: 1rem;
        }
        
        /* 推荐文章 - 图文背景融合卡 */
        #ai_auto_recommend-article {
            margin-bottom: 5rem;
        }
        
        .ai_auto_blend-card {
            height: 300px;
            border-radius: 10px;
            overflow: hidden;
            position: relative;
            margin-bottom: 1.5rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        
        .ai_auto_blend-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        
        .ai_auto_blend-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(transparent, rgba(0,0,0,0.8));
            padding: 2rem 1.5rem 1.5rem;
            color: white;
            transition: all 0.5s ease;
            transform: translateY(100px);
            opacity: 0;
        }
        
        .ai_auto_blend-card:hover .ai_auto_blend-overlay {
            transform: translateY(0);
            opacity: 1;
        }
        
        .ai_auto_blend-card:hover .ai_auto_blend-img {
            transform: scale(1.1);
        }
        
        .ai_auto_blend-title {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        
        .ai_auto_blend-meta {
            display: flex;
            gap: 1.5rem;
            font-size: 0.9rem;
            opacity: 0.8;
            margin-bottom: 1rem;
        }
        
        .ai_auto_blend-labels {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
        }
        
        .ai_auto_blend-label {
            background-color: rgba(255,255,255,0.2);
            color: white;
            padding: 0.25rem 0.75rem;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            backdrop-filter: blur(5px);
        }
        
        /* 订阅板块 */
        #ai_auto_subscribe {
            background-color: var(--light-gray);
            padding: 5rem 0;
            text-align: center;
        }
        
        .ai_auto_subscribe-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        
        .ai_auto_subscribe-info {
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 2.5rem;
            color: #6c757d;
        }
        
        .ai_auto_subscribe-form {
            max-width: 500px;
            margin: 0 auto;
            display: flex;
            gap: 0.5rem;
        }
        
        .ai_auto_subscribe-input {
            flex: 1;
            padding: 1rem;
            border: 1px solid var(--medium-gray);
            border-radius: 50px;
        }
        
        .ai_auto_subscribe-btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            border-radius: 50px;
            padding: 0 2rem;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        
        .ai_auto_subscribe-btn:hover {
            background-color: var(--accent-color);
        }
        
        /* Footer样式 */
        #ai_auto_footer {
            background-color: var(--dark-green);
            color: rgba(255,255,255,0.8);
            padding-top: 4rem;
        }
        
        #ai_auto_footer h5 {
            color: white;
            font-weight: 600;
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }
        
        #ai_auto_footer ul {
            list-style: none;
            padding: 0;
        }
        
        #ai_auto_footer ul li {
            margin-bottom: 0.75rem;
        }
        
        #ai_auto_footer a {
            color: rgba(255,255,255,0.7);
            text-decoration: none;
            transition: all 0.3s ease;
        }
        
        #ai_auto_footer a:hover {
            color: white;
            padding-left: 5px;
        }
        
        .ai_auto_footer-desc {
            margin-top: 1rem;
            line-height: 1.7;
        }
        
        .ai_auto_contact-item {
            display: flex;
            gap: 1rem;
            margin-bottom: 1rem;
            align-items: flex-start;
        }
        
        .ai_auto_contact-icon {
            color: var(--light-green);
            font-size: 1.2rem;
            margin-top: 3px;
        }
        
        .ai_auto_copyright {
            background-color: rgba(0,0,0,0.2);
            padding: 1.5rem 0;
            margin-top: 3rem;
            text-align: center;
        }
        
        /* 响应式调整 */
        @media (max-width: 992px) {
            .ai_auto_masonry-grid {
                column-count: 2;
            }
            
            .ai_auto_navbar-nav {
                margin-top: 1rem;
            }
            
            .ai_auto_search-form {
                margin-left: 0;
                margin-top: 1rem;
            }
        }
        
        @media (max-width: 768px) {
            .ai_auto_masonry-grid {
                column-count: 1;
            }
            
            .ai_auto_timeline-content {
                flex-direction: column;
            }
            
            .ai_auto_timeline-img {
                width: 100%;
            }
            
            .ai_auto_banner-title {
                font-size: 2.2rem;
            }
        }