/* 全局样式重置和基础设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --ai_auto_primary: #00a896;
    --ai_auto_secondary: #028090;
    --ai_auto_light: #f8f9fa;
    --ai_auto_dark: #343a40;
    --ai_auto_muted: #6c757d;
    --ai_auto_border: #e9ecef;
    --ai_auto_success: #28a745;
    --ai_auto_warning: #ffc107;
    --ai_auto_danger: #dc3545;
}

body {
    font-family: 'Open Sans', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

/* 导航栏样式 */
.ai_auto_header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.ai_auto_header_container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.ai_auto_logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--ai_auto_primary);
    text-decoration: none;
}

.ai_auto_nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.ai_auto_nav_list {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
}

.ai_auto_nav_item a {
    text-decoration: none;
    color: var(--ai_auto_dark);
    font-weight: 500;
    transition: color 0.3s ease;
}

.ai_auto_nav_item a:hover {
    color: var(--ai_auto_primary);
}

.ai_auto_search_form {
    display: flex;
    align-items: center;
}

.ai_auto_search_input {
    padding: 0.5rem 1rem;
    border: 1px solid var(--ai_auto_border);
    border-radius: 25px;
    outline: none;
    font-size: 0.9rem;
    transition: border-color 0.3s ease;
}

.ai_auto_search_input:focus {
    border-color: var(--ai_auto_primary);
}

.ai_auto_search_btn {
    background: none;
    border: none;
    color: var(--ai_auto_muted);
    cursor: pointer;
    margin-left: -2.5rem;
    transition: color 0.3s ease;
}

.ai_auto_search_btn:hover {
    color: var(--ai_auto_primary);
}

/* Hero Banner 样式 */
.ai_auto_hero {
    height: 100vh;
    background: linear-gradient(rgba(0, 168, 150, 0.3), rgba(2, 128, 144, 0.3)),
                url('https://images.unsplash.com/photo-1506905925346-21bda4d32df4?ixlib=rb-4.0.3&auto=format&fit=crop&w=1950&q=80') center/cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    margin-top: 80px;
}

.ai_auto_hero_content {
    max-width: 800px;
    padding: 0 2rem;
}

.ai_auto_hero_title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.ai_auto_hero_desc {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* 内容区域样式 */
#ai_auto_main {
    min-height: calc(100vh - 200px);
}

.ai_auto_container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* 页面标题样式 */
.ai_auto_page_header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 4rem 0 2rem;
    background: linear-gradient(135deg, var(--ai_auto_primary), var(--ai_auto_secondary));
    color: white;
}

.ai_auto_page_title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.ai_auto_page_desc {
    font-size: 1.1rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* 卡片网格布局 */
.ai_auto_grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.ai_auto_card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    height: 400px;
    display: flex;
    flex-direction: column;
}

.ai_auto_card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.ai_auto_card_image {
    height: 200px;
    overflow: hidden;
}

.ai_auto_card_image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.ai_auto_card:hover .ai_auto_card_image img {
    transform: scale(1.05);
}

.ai_auto_card_content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.ai_auto_card_title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--ai_auto_dark);
    line-height: 1.3;
}

.ai_auto_card_desc {
    color: var(--ai_auto_muted);
    margin-bottom: 1rem;
    flex-grow: 1;
    font-size: 0.9rem;
    line-height: 1.5;
}

.ai_auto_card_meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    font-size: 0.8rem;
    color: var(--ai_auto_muted);
}

.ai_auto_card_author {
    font-weight: 500;
}

.ai_auto_card_date {
    font-size: 0.8rem;
}

.ai_auto_labels {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.ai_auto_label {
    background: var(--ai_auto_light);
    color: var(--ai_auto_muted);
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    font-size: 0.7rem;
    text-decoration: none;
    transition: all 0.3s ease;
}

.ai_auto_label:hover {
    background: var(--ai_auto_primary);
    color: white;
}

.ai_auto_read_more {
    display: inline-block;
    background: var(--ai_auto_primary);
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    text-align: center;
    margin-top: 1rem;
}

.ai_auto_read_more:hover {
    background: var(--ai_auto_secondary);
    transform: translateY(-2px);
}

/* 分页样式 */
.ai_auto_pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin: 3rem 0;
}

.ai_auto_pagination .page-link {
    padding: 0.5rem 1rem;
    border: 1px solid var(--ai_auto_border);
    border-radius: 5px;
    text-decoration: none;
    color: var(--ai_auto_dark);
    transition: all 0.3s ease;
}

.ai_auto_pagination .page-link:hover {
    background: var(--ai_auto_primary);
    color: white;
    border-color: var(--ai_auto_primary);
}

.ai_auto_pagination .active .page-link {
    background: var(--ai_auto_primary);
    color: white;
    border-color: var(--ai_auto_primary);
}

/* 详情页样式 */
.ai_auto_detail {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

.ai_auto_detail_header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem 0;
}

.ai_auto_detail_title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--ai_auto_dark);
    line-height: 1.2;
}

.ai_auto_detail_meta {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    color: var(--ai_auto_muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.ai_auto_detail_desc {
    font-size: 1.1rem;
    color: var(--ai_auto_muted);
    line-height: 1.6;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.ai_auto_detail_content {
    line-height: 1.8;
    font-size: 1.1rem;
    color: #444;
}

.ai_auto_detail_content p {
    margin-bottom: 1.5rem;
}

.ai_auto_detail_content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1.5rem 0;
}

.ai_auto_detail_content h1,
.ai_auto_detail_content h2,
.ai_auto_detail_content h3 {
    margin: 2rem 0 1rem;
    color: var(--ai_auto_dark);
}

/* Footer 样式 */
.ai_auto_footer {
    background: var(--ai_auto_dark);
    color: white;
    padding: 3rem 0 1rem;
}

.ai_auto_footer_container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    padding: 0 2rem;
}

.ai_auto_footer_section h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: white;
}

.ai_auto_footer_desc {
    color: #adb5bd;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.ai_auto_footer_list {
    list-style: none;
}

.ai_auto_footer_list li {
    margin-bottom: 0.5rem;
}

.ai_auto_footer_list a {
    color: #adb5bd;
    text-decoration: none;
    transition: color 0.3s ease;
}

.ai_auto_footer_list a:hover {
    color: white;
}

.ai_auto_contact_list {
    list-style: none;
}

.ai_auto_contact_list li {
    margin-bottom: 0.5rem;
    color: #adb5bd;
}

.ai_auto_copyright {
    text-align: center;
    padding-top: 2rem;
    margin-top: 2rem;
    border-top: 1px solid #495057;
    color: #adb5bd;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .ai_auto_header_container {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    
    .ai_auto_nav {
        flex-direction: column;
        gap: 1rem;
    }
    
    .ai_auto_nav_list {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .ai_auto_hero_title {
        font-size: 2.5rem;
    }
    
    .ai_auto_hero_desc {
        font-size: 1rem;
    }
    
    .ai_auto_grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .ai_auto_container {
        padding: 1rem;
    }
    
    .ai_auto_page_title {
        font-size: 2rem;
    }
    
    .ai_auto_detail_title {
        font-size: 2rem;
    }
    
    .ai_auto_footer_container {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

/* 加载动画 */
.ai_auto_loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--ai_auto_primary);
    border-radius: 50%;
    animation: ai_auto_spin 1s linear infinite;
}

@keyframes ai_auto_spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}