:root {
            --primary-color: #3A8E7D;
            --accent-color: #F9A825;
            --secondary-color: #6A5ACD;
            --light-color: #C8E6C9;
            --dark-color: #1a3c34;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: #f8f9fa;
            color: #333;
        }
        
        /* 导航条样式 */
        #ai_auto_navbar {
            background: linear-gradient(135deg, var(--dark-color) 0%, var(--primary-color) 100%);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        
        .ai_auto_navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: white !important;
            letter-spacing: 1px;
            text-transform: uppercase;
        }
        
        .ai_auto_nav-link {
            color: rgba(255, 255, 255, 0.85) !important;
            font-weight: 500;
            margin: 0 10px;
            padding: 8px 15px !important;
            border-radius: 30px;
            transition: all 0.3s ease;
        }
        
        .ai_auto_nav-link:hover {
            color: white !important;
            background: rgba(255, 255, 255, 0.15);
        }
        
        .ai_auto_search-form {
            position: relative;
        }
        
        .ai_auto_search-input {
            background: rgba(255, 255, 255, 0.15);
            border: none;
            border-radius: 30px;
            color: white;
            padding: 10px 20px;
            padding-right: 50px;
            transition: all 0.3s ease;
        }
        
        .ai_auto_search-input:focus {
            background: rgba(255, 255, 255, 0.25);
            box-shadow: none;
            outline: none;
        }
        
        .ai_auto_search-btn {
            position: absolute;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            background: transparent;
            border: none;
            color: rgba(255, 255, 255, 0.7);
        }
        
        /* Banner样式 */
        #ai_auto_banner {
            background: linear-gradient(rgba(26, 60, 52, 0.85), rgba(26, 60, 52, 0.85)), url('https://images.unsplash.com/photo-1547592180-85f173990554?ixlib=rb-4.0.3') center/cover;
            padding: 100px 0;
            color: white;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .ai_auto_halftone-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(circle, transparent 20%, var(--primary-color) 80%), var(--primary-color);
            opacity: 0.2;
            pointer-events: none;
        }
        
        .ai_auto_banner-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 20px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }
        
        .ai_auto_banner-info {
            font-size: 1.3rem;
            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: 15px 25px;
            border-radius: 50px;
            border: none;
            font-size: 1.1rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        }
        
        .ai_auto_banner-search .btn {
            position: absolute;
            right: 5px;
            top: 5px;
            bottom: 5px;
            border-radius: 50px;
            background: var(--accent-color);
            color: white;
            padding: 0 25px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        
        .ai_auto_banner-search .btn:hover {
            background: #e09700;
        }
        
        /* 文章区域通用样式 */
        #ai_auto_home-artice {
            padding: 80px 0;
            background-color: #f8f9fa;
        }
        
        .ai_auto_section-title {
            position: relative;
            font-weight: 700;
            margin-bottom: 40px;
            color: var(--dark-color);
            text-align: center;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        
        .ai_auto_section-title:after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--accent-color);
            border-radius: 2px;
        }
        
        .ai_auto_article-card {
            background: white;
            border-radius: 12px;
            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-content {
            padding: 20px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        
        .ai_auto_article-title {
            font-weight: 700;
            font-size: 1.3rem;
            margin-bottom: 10px;
            color: var(--dark-color);
            transition: color 0.3s ease;
        }
        
        .ai_auto_article-title:hover {
            color: var(--primary-color);
            text-decoration: none;
        }
        
        .ai_auto_article-desc {
            color: #666;
            margin-bottom: 15px;
            flex-grow: 1;
        }
        
        .ai_auto_article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: #777;
            font-size: 0.9rem;
            margin-top: 10px;
        }
        
        .ai_auto_article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 10px;
        }
        
        .ai_auto_tag {
            background: var(--light-color);
            color: var(--primary-color);
            padding: 3px 10px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
            transition: all 0.2s ease;
        }
        
        .ai_auto_tag:hover {
            background: var(--primary-color);
            color: white;
            text-decoration: none;
        }
        
        /* 特色文章布局 - 杂志式排版 */
        #ai_auto_feature-article {
            margin-bottom: 80px;
        }
        
        .ai_auto_feature-main {
            position: relative;
            height: 500px;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            margin-bottom: 30px;
        }
        
        .ai_auto_feature-main-img {
            width: 100%;
            height: 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: 30px;
        }
        
        .ai_auto_feature-main-title {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 15px;
        }
        
        .ai_auto_feature-main-desc {
            font-size: 1.1rem;
            opacity: 0.9;
            margin-bottom: 20px;
        }
        
        .ai_auto_feature-side .ai_auto_article-card {
            margin-bottom: 25px;
            height: auto;
        }
        
        .ai_auto_feature-side .ai_auto_article-img {
            height: 150px;
        }
        
        /* 最近文章布局 - 单列时间线卡片 */
        #ai_auto_last-article {
            margin-bottom: 80px;
        }
        
        .ai_auto_timeline-card {
            position: relative;
            padding-left: 30px;
            margin-bottom: 40px;
            border-left: 3px solid var(--primary-color);
        }
        
        .ai_auto_timeline-date {
            position: absolute;
            left: -45px;
            top: 0;
            background: var(--primary-color);
            color: white;
            width: 90px;
            padding: 8px 15px;
            border-radius: 6px;
            text-align: center;
            font-weight: 600;
            box-shadow: 0 4px 10px rgba(58, 142, 125, 0.3);
        }
        
        .ai_auto_timeline-content {
            background: white;
            border-radius: 0 12px 12px 12px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            padding: 30px;
            display: flex;
            gap: 25px;
            transition: all 0.3s ease;
        }
        
        .ai_auto_timeline-content:hover {
            transform: translateX(10px);
        }
        
        .ai_auto_timeline-img {
            width: 250px;
            height: 200px;
            object-fit: cover;
            border-radius: 8px;
            flex-shrink: 0;
        }
        
        .ai_auto_timeline-text {
            flex-grow: 1;
        }
        
        /* 推荐文章布局 - 图文背景融合卡 */
        #ai_auto_recommend-article {
            margin-bottom: 60px;
        }
        
        .ai_auto_overlay-card {
            position: relative;
            height: 300px;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            transition: all 0.4s ease;
            margin-bottom: 25px;
            display: block;
        }
        
        .ai_auto_overlay-card-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            filter: grayscale(20%) contrast(110%);
            transition: all 0.5s ease;
        }
        
        .ai_auto_overlay-card-content {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 25px;
            background: linear-gradient(transparent, rgba(26, 60, 52, 0.8));
            color: white;
            transform: translateY(80px);
            transition: all 0.4s ease;
        }
        
        .ai_auto_overlay-card:hover {
            transform: translateY(-10px);
        }
        
        .ai_auto_overlay-card:hover .ai_auto_overlay-card-img {
            transform: scale(1.1);
            filter: grayscale(0%) contrast(100%);
        }
        
        .ai_auto_overlay-card:hover .ai_auto_overlay-card-content {
            transform: translateY(0);
        }
        
        .ai_auto_overlay-card-title {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        
        .ai_auto_overlay-card-meta {
            display: flex;
            justify-content: space-between;
            font-size: 0.9rem;
            opacity: 0.8;
        }
        
        /* 订阅板块样式 */
        #ai_auto_subscribe {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--dark-color) 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-input {
            padding: 15px 25px;
            border-radius: 50px;
            border: none;
            font-size: 1.1rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        }
        
        .ai_auto_subscribe-btn {
            background: var(--accent-color);
            color: white;
            border: none;
            padding: 15px 40px;
            border-radius: 50px;
            font-weight: 600;
            transition: all 0.3s ease;
            margin-top: 20px;
        }
        
        .ai_auto_subscribe-btn:hover {
            background: #e09700;
            transform: translateY(-3px);
        }
        
        /* Footer样式 */
        #ai_auto_footer {
            background: var(--dark-color);
            color: rgba(255, 255, 255, 0.8);
            padding-top: 60px;
        }
        
        .ai_auto_footer-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: white;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .ai_auto_footer-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background: var(--accent-color);
        }
        
        .ai_auto_footer-desc {
            margin-bottom: 20px;
            line-height: 1.7;
        }
        
        .ai_auto_footer-links {
            list-style: none;
            padding: 0;
        }
        
        .ai_auto_footer-links li {
            margin-bottom: 12px;
        }
        
        .ai_auto_footer-links a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            transition: all 0.3s ease;
            display: block;
        }
        
        .ai_auto_footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        
        .ai_auto_footer-contact {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
        }
        
        .ai_auto_footer-contact i {
            color: var(--accent-color);
            margin-right: 15px;
            width: 20px;
        }
        
        .ai_auto_copyright {
            background: rgba(0, 0, 0, 0.2);
            padding: 25px 0;
            margin-top: 60px;
            text-align: center;
            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%;
            }
            
            .ai_auto_feature-main {
                height: 400px;
            }
        }
        
        @media (max-width: 768px) {
            .ai_auto_banner-title {
                font-size: 2.5rem;
            }
            
            .ai_auto_feature-main {
                height: 300px;
            }
            
            .ai_auto_feature-main-title {
                font-size: 1.5rem;
            }
        }