/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f7f7f8;
    --bg-card: #ffffff;
    --text-primary: #202123;
    --text-secondary: #6e6e80;
    --accent-color: #10a37f;
    --border-color: #e5e5e5;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
    transition: opacity 0.2s;
}

a:hover {
    opacity: 0.8;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0 24px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 18px;
}

.new-chat-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    color: var(--text-secondary);
    transition: background 0.2s;
}

.new-chat-btn:hover {
    background: var(--bg-secondary);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    color: var(--text-secondary);
}

.btn-login {
    padding: 8px 16px;
    font-size: 14px;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
}

.btn-login:hover {
    background: var(--bg-secondary);
}

/* 左侧边栏 */
.sidebar {
    position: fixed;
    top: 56px;
    left: 0;
    width: 160px;
    height: calc(100vh - 56px);
    padding: 16px;
    padding-top: calc((100vh - 56px) / 6);
    background: var(--bg-primary);
    z-index: 100;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sidebar-link {
    padding: 8px 12px;
    font-size: 14px;
    color: var(--text-secondary);
    border-radius: 8px;
    transition: all 0.2s;
    white-space: pre;
}

.sidebar-link:hover {
    color: var(--text-primary);
    background: var(--bg-secondary);
}

/* 主内容区域 */
.main-content {
    margin-left: 160px;
    padding-top: 56px;
}

/* Hero 区域 */
.hero {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 24px 40px;
    background: var(--bg-primary);
}

.hero-content {
    text-align: center;
    max-width: 600px;
}

.hero h1 {
    font-size: 36px;
    font-weight: 500;
    margin-bottom: 32px;
    line-height: 1.3;
    color: var(--text-primary);
}

.search-box {
    display: flex;
    align-items: center;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 12px 12px 12px 20px;
    margin-bottom: 24px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.search-box input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 15px;
    padding: 4px 0;
}

.search-box input::placeholder {
    color: var(--text-secondary);
}

.send-btn {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.send-btn:hover {
    background: var(--border-color);
}

.send-btn svg {
    width: 16px;
    height: 16px;
    color: var(--text-secondary);
}

.quick-links {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.quick-link {
    padding: 8px 16px;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 13px;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.quick-link:hover {
    background: #f7f7f8;
    color: var(--text-primary);
}

.more-link {
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: underline;
}

.more-link:hover {
    color: var(--text-primary);
}

/* 特色内容区域 */
.featured {
    padding: 80px 0;
    max-width: 1200px;
    margin: 0 auto;
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 200px);
    gap: 24px;
}

.featured-card {
    background: var(--bg-card);
    border-radius: 16px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s;
    border: 1px solid var(--border-color);
}

.featured-card:hover {
    transform: translateY(-4px);
}

.featured-card a {
    display: block;
    text-decoration: none;
    color: inherit;
    height: 100%;
    position: relative;
}

/* 第一个卡片（大卡片）占据左侧2行 - 图片填满，标题悬浮底部 */
.featured-card:nth-child(1) {
    grid-column: 1;
    grid-row: 1 / 3;
}

.featured-card:nth-child(1) a {
    display: block;
    height: 100%;
}

.featured-card:nth-child(1) .card-image {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    height: 100%;
}

.featured-card:nth-child(1) .card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.featured-card:nth-child(1) .card-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent 0%, rgba(0,0,0,0.7) 100%);
    color: #fff;
    padding: 60px 20px 20px;
}

.featured-card:nth-child(1) .card-tag {
    color: rgba(255,255,255,0.9);
}

.featured-card:nth-child(1) .card-meta {
    color: rgba(255,255,255,0.7);
}

/* 第二个卡片在右上 */
.featured-card:nth-child(2) {
    grid-column: 2;
    grid-row: 1;
}

/* 第三个卡片在右下 */
.featured-card:nth-child(3) {
    grid-column: 2;
    grid-row: 2;
}

/* 第四个卡片在左下（第3行左侧） */
.featured-card:nth-child(4) {
    grid-column: 1;
    grid-row: 3;
}

/* 小卡片样式 - 图片也填满，标题悬浮底部 */
.featured-card:nth-child(2) a,
.featured-card:nth-child(3) a,
.featured-card:nth-child(4) a {
    display: block;
    height: 100%;
}

.featured-card:nth-child(2) .card-image,
.featured-card:nth-child(3) .card-image,
.featured-card:nth-child(4) .card-image {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    height: 100%;
}

.featured-card:nth-child(2) .card-content,
.featured-card:nth-child(3) .card-content,
.featured-card:nth-child(4) .card-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent 0%, rgba(0,0,0,0.7) 100%);
    color: #fff;
    padding: 40px 16px 16px;
}

.featured-card:nth-child(2) .card-tag,
.featured-card:nth-child(3) .card-tag,
.featured-card:nth-child(4) .card-tag {
    color: rgba(255,255,255,0.9);
}

.featured-card:nth-child(2) .card-meta,
.featured-card:nth-child(3) .card-meta,
.featured-card:nth-child(4) .card-meta {
    color: rgba(255,255,255,0.7);
}

.card-image {
    width: 100%;
    height: 120px;
    overflow: hidden;
    flex-shrink: 0;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-content {
    padding: 12px 16px;
}

.card-content h3 {
    font-size: 15px;
    line-height: 1.4;
    margin-bottom: 6px;
}

.placeholder-image {
    width: 100%;
    height: 100%;
    background-size: cover;
}

.gradient-1 { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
.gradient-2 { background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%); }
.gradient-3 { background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); }
.gradient-4 { background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%); }
.gradient-5 { background: linear-gradient(135deg, #fa709a 0%, #fee140 100%); }
.gradient-6 { background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%); }
.gradient-7 { background: linear-gradient(135deg, #d299c2 0%, #fef9d7 100%); }
.gradient-8 { background: linear-gradient(135deg, #89f7fe 0%, #66a6ff 100%); }
.gradient-9 { background: linear-gradient(135deg, #cd9cf2 0%, #f6f3ff 100%); }
.gradient-10 { background: linear-gradient(135deg, #fddb92 0%, #d1fdff 100%); }

.card-content {
    padding: 20px;
}

.card-tag {
    display: inline-block;
    font-size: 12px;
    color: var(--accent-color);
    margin-bottom: 8px;
}

.card-content h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 12px;
}

.card-content h3 {
    font-size: 18px;
    font-weight: 500;
    margin-bottom: 12px;
}

.card-meta {
    display: flex;
    gap: 16px;
    font-size: 13px;
    color: var(--text-secondary);
}

/* 新闻区域 */
.news-section {
    padding: 80px 0;
    background: var(--bg-primary);
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

.section-header h2 {
    font-size: 24px;
    font-weight: 600;
}

.view-all {
    color: var(--text-secondary);
    font-size: 14px;
}

.view-all:hover {
    color: var(--text-primary);
}

/* 新版新闻网格 - 带缩略图 */
.news-grid-new {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 60px;
}

.news-card {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    cursor: pointer;
}

.news-card:hover .news-info h3 {
    color: var(--accent-color);
}

.news-thumb {
    flex-shrink: 0;
    width: 120px;
    height: 120px;
    border-radius: 12px;
    overflow: hidden;
}

.news-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-thumb .placeholder-image {
    width: 100%;
    height: 100%;
}

.logo-thumb {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    color: var(--text-primary);
    position: relative;
}

.logo-thumb .logo-badge {
    font-size: 12px;
    font-weight: 600;
    margin-top: 4px;
}

.news-info {
    flex: 1;
    padding-top: 8px;
}

.news-info h3 {
    font-size: 16px;
    font-weight: 500;
    line-height: 1.5;
    margin-bottom: 12px;
    color: var(--text-primary);
    transition: color 0.2s;
}

.news-meta {
    display: flex;
    gap: 12px;
    font-size: 13px;
    color: var(--text-secondary);
}

.news-meta .tag {
    color: var(--text-secondary);
}

/* 更多渐变色 */
.gradient-11 { background: linear-gradient(135deg, #e8d5b7 0%, #b8a082 100%); }
.gradient-12 { background: linear-gradient(135deg, #a8d8ea 0%, #aa96da 100%); }
.gradient-13 { background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%); }
.gradient-14 { background: linear-gradient(135deg, #fbc2eb 0%, #a6c1ee 100%); }
.gradient-15 { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
.gradient-16 { background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%); }
.gradient-17 { background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%); }
.gradient-18 { background: linear-gradient(135deg, #a1c4fd 0%, #c2e9fb 100%); }

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.news-item {
    padding: 24px;
    background: var(--bg-card);
    border-radius: 12px;
    cursor: pointer;
    transition: background 0.2s;
    border: 1px solid var(--border-color);
}

.news-item:hover {
    background: #f7f7f8;
}

.news-item h3 {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 16px;
    line-height: 1.5;
}

/* 客户案例区域 */
.cases-section {
    padding: 80px 0;
    max-width: 1200px;
    margin: 0 auto;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.case-card {
    background: var(--bg-card);
    border-radius: 16px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s;
    border: 1px solid var(--border-color);
}

.case-card:hover {
    transform: translateY(-4px);
}

.case-image {
    height: 180px;
    overflow: hidden;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.case-content {
    padding: 20px;
}

.case-content h3 {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 12px;
}

.case-meta {
    display: flex;
    gap: 12px;
    font-size: 13px;
    color: var(--text-secondary);
}

.case-meta .tag {
    color: var(--accent-color);
}

/* 研究区域 */
.research-section {
    padding: 80px 0;
    background: var(--bg-primary);
    max-width: 1200px;
    margin: 0 auto;
}

.research-grid-new {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.research-card {
    cursor: pointer;
}

.research-card:hover .research-info h3 {
    color: var(--accent-color);
}

.research-thumb {
    width: 100%;
    height: 280px;
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: 20px;
}

.research-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.research-thumb .placeholder-image {
    width: 100%;
    height: 100%;
}

/* 研究卡片渐变背景 */
.gradient-research-1 {
    background: #f5f5f5;
}

.gradient-research-2 {
    background: linear-gradient(135deg, #2d8a6e 0%, #1a5c4a 50%, #4a9079 100%);
}

.gradient-research-3 {
    background: linear-gradient(135deg, #f8d5c2 0%, #e8a87c 30%, #7eb8c9 70%, #f5c6a5 100%);
}

.research-info h3 {
    font-size: 16px;
    font-weight: 500;
    line-height: 1.5;
    margin-bottom: 12px;
    color: var(--text-primary);
    transition: color 0.2s;
}

.research-meta {
    display: flex;
    gap: 12px;
    font-size: 13px;
    color: var(--text-secondary);
}

.research-meta .tag {
    color: var(--text-secondary);
}

/* 更多案例 */
.more-cases {
    padding: 80px 0;
}

.more-cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.more-case-card {
    background: var(--bg-card);
    border-radius: 16px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s;
    border: 1px solid var(--border-color);
}

.more-case-card:hover {
    transform: translateY(-4px);
}

.more-case-image {
    height: 200px;
}

.more-case-content {
    padding: 20px;
}

.more-case-content .tag {
    display: inline-block;
    font-size: 12px;
    color: var(--accent-color);
    margin-bottom: 8px;
}

.more-case-content h3 {
    font-size: 16px;
    font-weight: 500;
    line-height: 1.5;
}

/* CTA 区域 */
.cta-section {
    padding: 120px 0;
    background: linear-gradient(180deg, #ffffff 0%, #f7f7f8 100%);
}

.cta-content {
    text-align: center;
}

.cta-content h2 {
    font-size: 40px;
    font-weight: 600;
    margin-bottom: 32px;
}

.btn-download {
    display: inline-block;
    padding: 14px 32px;
    background: #202123;
    color: #ffffff;
    border-radius: 28px;
    font-size: 16px;
    font-weight: 500;
    transition: transform 0.2s;
}

.btn-download:hover {
    transform: scale(1.05);
}

/* 页脚 */
.footer {
    padding: 60px 0 40px;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    margin-left: 160px;  /* 与侧边栏宽度一致 */
}

.footer .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 60px;
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 12px;
}

.footer-col a {
    font-size: 14px;
    color: var(--text-secondary);
}

.footer-col a:hover {
    color: var(--text-primary);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 16px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    flex-wrap: wrap;
}

.footer-phone {
    display: flex;
    align-items: center;
    margin-left: 16px;
    padding-left: 16px;
    border-left: 1px solid #ddd;
}

.footer-beian {
    margin-left: 16px;
    padding-left: 16px;
    border-left: 1px solid #ddd;
}

.footer-beian a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
}

.footer-beian a:hover {
    color: var(--text-primary);
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    font-size: 13px;
    color: var(--text-secondary);
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    color: var(--text-secondary);
    transition: color 0.2s;
}

.social-links a:hover {
    color: var(--text-primary);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .sidebar {
        width: 140px;
    }
    
    .main-content {
        margin-left: 140px;
    }
    
    .footer {
        margin-left: 140px;
    }
    
    .featured-grid {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
        min-height: auto;
    }
    
    .featured-card {
        height: 250px;
    }
    
    .featured-card:nth-child(1),
    .featured-card:nth-child(2),
    .featured-card:nth-child(3),
    .featured-card:nth-child(4) {
        grid-column: 1;
        grid-row: auto;
    }
    
    /* 响应式下所有卡片统一样式 */
    .featured-card a {
        display: block;
        height: 100%;
        position: relative;
    }
    
    .featured-card .card-image {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        height: 100%;
    }
    
    .featured-card .card-content {
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        background: linear-gradient(transparent 0%, rgba(0,0,0,0.7) 100%);
        color: #fff;
        padding: 40px 16px 16px;
    }
    
    .featured-card .card-tag {
        color: rgba(255,255,255,0.9);
    }
    
    .featured-card .card-meta {
        color: rgba(255,255,255,0.7);
    }
    
    .news-grid-new {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .research-grid-new {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-grid,
    .cases-grid,
    .more-cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .article-header h1 {
        font-size: 28px;
    }
}

@media (max-width: 768px) {
    .sidebar {
        display: none;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .footer {
        margin-left: 0;
    }
    
    .container {
        padding: 0 16px;
    }
    
    .hero {
        min-height: 50vh;
        padding: 40px 16px 30px;
    }
    
    .hero h1 {
        font-size: 24px;
    }
    
    .search-box {
        padding: 10px 10px 10px 16px;
    }
    
    .quick-links {
        flex-direction: column;
        align-items: center;
    }
    
    .featured,
    .news-section,
    .cases-section,
    .research-section,
    .more-cases,
    .page-section {
        padding: 40px 0;
    }
    
    .news-thumb {
        width: 80px;
        height: 80px;
    }
    
    .news-card {
        gap: 12px;
    }
    
    .news-info h3 {
        font-size: 14px;
    }
    
    .research-grid-new {
        grid-template-columns: 1fr;
    }
    
    .research-thumb {
        height: 200px;
    }
    
    .news-grid,
    .cases-grid,
    .more-cases-grid {
        grid-template-columns: 1fr;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .section-header h2 {
        font-size: 20px;
    }
    
    .cta-content h2 {
        font-size: 24px;
    }
    
    .cta-section {
        padding: 60px 0;
    }
    
    .footer {
        padding: 40px 0 30px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px;
    }
    
    /* 文章详情页响应式 */
    .article-header h1 {
        font-size: 24px;
    }
    
    .article-content {
        font-size: 15px;
    }
    
    .article-content h2 {
        font-size: 20px;
    }
    
    .article-content h3 {
        font-size: 18px;
    }
    
    .page-header h1 {
        font-size: 24px;
    }
    
    /* 卡片响应式 */
    .card-content h2 {
        font-size: 20px;
    }
    
    .card-content h3 {
        font-size: 16px;
    }
    
    .card-image,
    .case-image {
        height: 160px;
    }
    
    .featured-card.large .card-image {
        height: 200px;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 12px;
    }
    
    .nav-right .btn-login {
        display: none;
    }
    
    .logo span {
        font-size: 16px;
    }
    
    .hero h1 {
        font-size: 20px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .news-thumb {
        width: 70px;
        height: 70px;
    }
    
    .card-content {
        padding: 16px;
    }
    
    .case-content,
    .more-case-content {
        padding: 16px;
    }
    
    .search-form {
        flex-direction: column;
    }
    
    .btn-search {
        width: 100%;
    }
}


/* 页面通用样式 */
.page-section {
    padding: 80px 0;
}

.page-header {
    margin-bottom: 40px;
}

.page-header h1 {
    font-size: 32px;
    font-weight: 600;
    color: var(--text-primary);
}

/* 文章详情页 */
.article-detail {
    max-width: 800px;
    margin: 0 auto;
}

.article-header {
    margin-bottom: 32px;
}

.article-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--bg-secondary);
    border-radius: 16px;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.article-header h1 {
    font-size: 36px;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.article-meta {
    font-size: 14px;
    color: var(--text-secondary);
}

.article-meta span {
    margin-right: 16px;
}

.article-cover {
    margin-bottom: 32px;
    border-radius: 16px;
    overflow: hidden;
}

.article-cover img {
    width: 100%;
    height: auto;
}

.article-content {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-primary);
}

.article-content p {
    margin-bottom: 16px;
}

.article-content h2 {
    font-size: 24px;
    font-weight: 600;
    margin: 32px 0 16px;
}

.article-content h3 {
    font-size: 20px;
    font-weight: 600;
    margin: 24px 0 12px;
}

.article-content img {
    max-width: 100%;
    border-radius: 8px;
    margin: 16px 0;
}

.article-content ul, .article-content ol {
    margin: 16px 0;
    padding-left: 24px;
}

.article-content li {
    margin-bottom: 8px;
}

.article-actions {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 16px;
}

.btn-link {
    color: var(--accent-color);
    font-size: 14px;
    padding: 10px 0;
}

.back-link {
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.back-link a {
    color: var(--text-secondary);
    font-size: 14px;
}

.back-link a:hover {
    color: var(--text-primary);
}

/* 搜索页面 */
.search-form {
    display: flex;
    gap: 12px;
    margin-bottom: 32px;
}

.search-input {
    flex: 1;
    padding: 12px 20px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    background: var(--bg-card);
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-color);
}

.btn-search {
    padding: 12px 24px;
    background: var(--text-primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
}

.search-results {
    margin-top: 24px;
}

.results-count {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.results-list {
    list-style: none;
}

.result-item {
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
}

.result-type {
    display: inline-block;
    padding: 2px 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
    font-size: 12px;
    color: var(--text-secondary);
    margin-right: 12px;
}

.result-item a {
    font-size: 16px;
    color: var(--text-primary);
}

.result-item a:hover {
    color: var(--accent-color);
}

.no-results {
    color: var(--text-secondary);
    text-align: center;
    padding: 48px 0;
}

/* 新闻卡片链接样式 */
.news-card a,
.case-card a,
.research-card a,
.featured-card a {
    display: flex;
    text-decoration: none;
    color: inherit;
}

.news-card a {
    align-items: flex-start;
    gap: 20px;
}

.case-card a,
.research-card a,
.featured-card a {
    flex-direction: column;
    height: 100%;
}