:root {
            --primary: #2c6a9a;
            --secondary: #34a4dc;
            --accent1: #5cb85c;
            --accent2: #9b59b6;
            --dark: #1a3c5a;
            --light: #e8f4fc;
        }
        
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        
        body {
            font-family: 'Montserrat', sans-serif;
            background: linear-gradient(135deg, #f8fdff 0%, #e6f7ff 100%);
            color: #333;
            line-height: 1.6;
        }
        
        /* 拟物风格元素 */
        .ai_auto_skeuomorphic {
            border: 1px solid rgba(0,0,0,0.1);
            border-radius: 12px;
            background: #fff;
            box-shadow: 
                0 4px 6px rgba(0,0,0,0.05),
                0 1px 3px rgba(0,0,0,0.1),
                inset 0 1px 0 rgba(255,255,255,0.5);
            overflow: hidden;
            transition: all 0.3s ease;
            position: relative;
        }
        
        .ai_auto_skeuomorphic:hover {
            transform: translateY(-5px);
            box-shadow: 
                0 10px 15px rgba(0,0,0,0.1),
                0 4px 6px rgba(0,0,0,0.05),
                inset 0 1px 0 rgba(255,255,255,0.8);
        }
        
        /* 导航条 */
        #ai_auto_navbar {
            background: linear-gradient(to right, var(--dark) 0%, var(--primary) 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-family: 'Roboto Slab', serif;
            font-size: 1.8rem;
            font-weight: 700;
            color: white !important;
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }
        
        .ai_auto_navbar-brand span {
            color: var(--accent1);
        }
        
        .ai_auto_nav-link {
            color: rgba(255,255,255,0.85) !important;
            font-weight: 500;
            padding: 0.5rem 1rem !important;
            margin: 0 0.2rem;
            border-radius: 6px;
            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: 50px;
            padding: 0.6rem 1.5rem 0.6rem 3rem;
            color: white;
            width: 250px;
            transition: all 0.3s ease;
        }
        
        .ai_auto_search-input:focus {
            background: rgba(255,255,255,0.25);
            outline: none;
            box-shadow: 0 0 0 3px rgba(52, 164, 220, 0.3);
            width: 300px;
        }
        
        .ai_auto_search-input::placeholder {
            color: rgba(255,255,255,0.7);
        }
        
        .ai_auto_search-btn {
            position: absolute;
            left: 1rem;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: rgba(255,255,255,0.8);
        }
        
        /* Banner区域 */
        #ai_auto_banner {
            background: linear-gradient(rgba(26, 60, 90, 0.8), rgba(26, 60, 90, 0.8)), 
                        url('https://images.unsplash.com/photo-1532094349884-543bc11b234d?ixlib=rb-4.0.3') no-repeat center center;
            background-size: cover;
            padding: 5rem 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .ai_auto_banner-content {
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }
        
        .ai_auto_banner-title {
            font-size: 3.5rem;
            font-weight: 700;
            color: white;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }
        
        .ai_auto_banner-info {
            font-size: 1.3rem;
            color: rgba(255,255,255,0.9);
            margin-bottom: 2.5rem;
            line-height: 1.8;
        }
        
        .ai_auto_banner-search {
            max-width: 600px;
            margin: 0 auto;
        }
        
        .ai_auto_banner-input {
            border: none;
            border-radius: 50px;
            padding: 1rem 1.5rem;
            font-size: 1.1rem;
            width: 100%;
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
        }
        
        /* 文章区域 */
        #ai_auto_home-artice {
            padding: 4rem 0;
            background: #f8fafc;
        }
        
        .ai_auto_section-title {
            position: relative;
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 2.5rem;
            text-align: center;
            padding-bottom: 1rem;
        }
        
        .ai_auto_section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--accent1);
            border-radius: 2px;
        }
        
        /* 特色文章 - 瀑布流布局 */
        #ai_auto_feature-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;
        }
        
        .ai_auto_feature-card {
            height: 100%;
            position: relative;
        }
        
        .ai_auto_feature-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 12px 12px 0 0;
        }
        
        .ai_auto_feature-body {
            padding: 1.5rem;
        }
        
        .ai_auto_feature-title {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
            color: var(--dark);
        }
        
        .ai_auto_feature-desc {
            color: #555;
            margin-bottom: 1.2rem;
        }
        
        .ai_auto_feature-meta {
            display: flex;
            justify-content: space-between;
            color: #777;
            font-size: 0.9rem;
        }
        
        .ai_auto_feature-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 1rem;
        }
        
        .ai_auto_tag {
            background: var(--secondary);
            color: white;
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
        }
        
        /* 最近文章 - 时间线布局 */
        #ai_auto_last-article {
            margin-bottom: 5rem;
        }
        
        .ai_auto_timeline {
            position: relative;
            max-width: 900px;
            margin: 0 auto;
        }
        
        .ai_auto_timeline:before {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            left: 50%;
            width: 3px;
            background: var(--secondary);
            margin-left: -1.5px;
        }
        
        .ai_auto_timeline-item {
            position: relative;
            margin-bottom: 2.5rem;
        }
        
        .ai_auto_timeline-date {
            position: absolute;
            top: 0;
            width: 100px;
            text-align: center;
            font-weight: 600;
            color: var(--primary);
            padding: 0.5rem;
            border-radius: 6px;
            background: white;
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
            left: calc(50% - 50px);
            z-index: 2;
        }
        
        .ai_auto_timeline-card {
            width: calc(50% - 40px);
            position: relative;
            background: white;
            border-radius: 12px;
            overflow: hidden;
            display: flex;
        }
        
        .ai_auto_timeline-left {
            left: 0;
            border-left: 3px solid var(--accent1);
        }
        
        .ai_auto_timeline-right {
            left: calc(50% + 40px);
            border-right: 3px solid var(--accent2);
        }
        
        .ai_auto_timeline-img {
            width: 40%;
            height: 180px;
            object-fit: cover;
        }
        
        .ai_auto_timeline-content {
            width: 60%;
            padding: 1.5rem;
        }
        
        .ai_auto_timeline-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--dark);
        }
        
        .ai_auto_timeline-desc {
            color: #555;
            font-size: 0.95rem;
            margin-bottom: 1rem;
        }
        
        .ai_auto_timeline-meta {
            color: #777;
            font-size: 0.85rem;
        }
        
        /* 推荐文章 - 图文背景融合卡 */
        #ai_auto_recommend-article {
            margin-bottom: 3rem;
        }
        
        .ai_auto_overlay-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        
        .ai_auto_overlay-card {
            position: relative;
            height: 300px;
            border-radius: 12px;
            overflow: hidden;
        }
        
        .ai_auto_overlay-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: all 0.5s ease;
        }
        
        .ai_auto_overlay-content {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(44, 106, 154, 0.85);
            color: white;
            padding: 1.5rem;
            transform: translateY(100%);
            transition: all 0.4s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
        }
        
        .ai_auto_overlay-card:hover .ai_auto_overlay-content {
            transform: translateY(0);
        }
        
        .ai_auto_overlay-card:hover .ai_auto_overlay-img {
            transform: scale(1.1);
        }
        
        .ai_auto_overlay-title {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
            color: white;
        }
        
        .ai_auto_overlay-meta {
            display: flex;
            justify-content: space-between;
            color: rgba(255,255,255,0.8);
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }
        
        .ai_auto_overlay-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        
        .ai_auto_overlay-tag {
            background: rgba(255,255,255,0.2);
            color: white;
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            font-size: 0.8rem;
        }
        
        /* 订阅区域 */
        #ai_auto_subscribe {
            padding: 5rem 0;
            background: linear-gradient(135deg, var(--primary) 0%, var(--dark) 100%);
            color: white;
            text-align: center;
        }
        
        .ai_auto_subscribe-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        
        .ai_auto_subscribe-info {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 2.5rem;
            opacity: 0.9;
        }
        
        .ai_auto_subscribe-form {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
        }
        
        .ai_auto_subscribe-input {
            flex: 1;
            border: none;
            border-radius: 50px 0 0 50px;
            padding: 1rem 1.5rem;
            font-size: 1.1rem;
        }
        
        .ai_auto_subscribe-btn {
            background: var(--accent1);
            color: white;
            border: none;
            border-radius: 0 50px 50px 0;
            padding: 0 2rem;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .ai_auto_subscribe-btn:hover {
            background: #4ca64c;
        }
        
        /* Footer区域 */
        #ai_auto_footer {
            background: var(--dark);
            color: rgba(255,255,255,0.8);
            padding-top: 4rem;
        }
        
        .ai_auto_footer-section {
            padding-bottom: 3rem;
        }
        
        .ai_auto_footer-title {
            color: white;
            font-size: 1.3rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 0.8rem;
        }
        
        .ai_auto_footer-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 3px;
            background: var(--secondary);
        }
        
        .ai_auto_footer-desc {
            margin-bottom: 1.5rem;
            line-height: 1.7;
        }
        
        .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;
            display: block;
        }
        
        .ai_auto_footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        
        .ai_auto_contact-list {
            list-style: none;
            padding: 0;
        }
        
        .ai_auto_contact-list li {
            margin-bottom: 1rem;
            display: flex;
            align-items: flex-start;
        }
        
        .ai_auto_contact-icon {
            color: var(--secondary);
            margin-right: 0.8rem;
            font-size: 1.2rem;
            min-width: 24px;
        }
        
        .ai_auto_copyright {
            background: rgba(0,0,0,0.2);
            padding: 1.5rem 0;
            text-align: center;
            font-size: 0.95rem;
        }
        
        /* RNA主题装饰元素 */
        .ai_auto_rna-decoration {
            position: absolute;
            opacity: 0.1;
            z-index: 1;
        }
        
        .ai_auto_rna-helix {
            position: absolute;
            width: 300px;
            height: 300px;
            background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 200'%3E%3Cpath d='M20,100 Q60,40 100,100 T180,100' stroke='white' stroke-width='2' fill='none'/%3E%3Cpath d='M20,120 Q60,160 100,120 T180,120' stroke='white' stroke-width='2' fill='none'/%3E%3C/svg%3E") no-repeat center center;
            background-size: contain;
            top: 50px;
            right: 50px;
        }
        
        .ai_auto_rna-bases {
            position: absolute;
            width: 200px;
            height: 200px;
            background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 200'%3E%3Ccircle cx='50' cy='50' r='8' fill='%235cb85c'/%3E%3Ccircle cx='100' cy='80' r='8' fill='%2334a4dc'/%3E%3Ccircle cx='150' cy='120' r='8' fill='%239b59b6'/%3E%3Ccircle cx='80' cy='150' r='8' fill='%2334a4dc'/%3E%3Ccircle cx='120' cy='50' r='8' fill='%235cb85c'/%3E%3C/svg%3E") no-repeat center center;
            background-size: contain;
            bottom: 20px;
            left: 30px;
        }
        
        /* 响应式调整 */
        @media (max-width: 992px) {
            .ai_auto_masonry-grid {
                column-count: 2;
            }
            
            .ai_auto_overlay-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .ai_auto_timeline:before {
                left: 30px;
            }
            
            .ai_auto_timeline-card {
                width: calc(100% - 80px);
                margin-left: 80px;
                border-left: 3px solid var(--accent1);
            }
            
            .ai_auto_timeline-date {
                left: 0;
            }
        }
        
        @media (max-width: 768px) {
            .ai_auto_masonry-grid {
                column-count: 1;
            }
            
            .ai_auto_overlay-grid {
                grid-template-columns: 1fr;
            }
            
            .ai_auto_navbar-nav {
                margin-top: 1rem;
            }
            
            .ai_auto_search-input {
                width: 100%;
                margin-top: 1rem;
            }
            
            .ai_auto_banner-title {
                font-size: 2.5rem;
            }
            
            .ai_auto_timeline-card {
                flex-direction: column;
            }
            
            .ai_auto_timeline-img {
                width: 100%;
                height: 150px;
            }
            
            .ai_auto_timeline-content {
                width: 100%;
            }
            
            .ai_auto_subscribe-form {
                flex-direction: column;
            }
            
            .ai_auto_subscribe-input {
                border-radius: 50px;
                margin-bottom: 1rem;
            }
            
            .ai_auto_subscribe-btn {
                border-radius: 50px;
                padding: 1rem;
            }
        }