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

:root {
    /* Stripe风格配色方案 */
    --primary-purple: #635bff;
    --primary-blue: #0073e6;
    --primary-green: #00d924;
    --dark-purple: #5a52d9;
    --light-purple: #f6f9fc;
    --text-primary: #1a1a1a;
    --text-secondary: #525f7f;
    --text-muted: #8898aa;
    --background-primary: #ffffff;
    --background-secondary: #f6f9fc;
    --border-light: #e6ebf1;
    --border-default: #c7d2fe;
    --gradient-1: linear-gradient(135deg, var(--primary-purple) 0%, var(--primary-blue) 100%);
    --gradient-2: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-blue) 100%);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
    --transition: all 0.2s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-primary);
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

.container-wide {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 导航栏 */
.navbar {
    background-color: var(--background-primary);
    border-bottom: 1px solid var(--border-light);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    height: 72px;
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.95);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

/* 汉堡菜单按钮 */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: var(--transition);
    border-radius: 2px;
}

/* 汉堡菜单激活状态 */
.hamburger.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
    align-items: center;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition);
    padding: 8px 0;
    position: relative;
}

.nav-menu a:hover {
    color: var(--text-primary);
}

.nav-menu a.active {
    color: var(--primary-purple);
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-1);
    border-radius: 1px;
}

/* 移动端导航菜单 */
.mobile-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.95);
    z-index: 1000;
    backdrop-filter: blur(10px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.mobile-nav.active {
    opacity: 1;
    visibility: visible;
}

.mobile-nav-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    padding: 80px 24px 24px;
}

.mobile-nav-menu {
    list-style: none;
    text-align: center;
    margin-bottom: 40px;
}

.mobile-nav-menu li {
    margin: 20px 0;
}

.mobile-nav-menu a {
    color: white;
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 500;
    transition: var(--transition);
    display: block;
    padding: 16px 0;
    position: relative;
}

.mobile-nav-menu a:hover,
.mobile-nav-menu a.active {
    color: var(--primary-purple);
}

.mobile-nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 3px;
    background: var(--gradient-1);
    border-radius: 2px;
}

.mobile-nav-buttons {
    display: flex;
    flex-direction: column;
    gap: 16px;
    align-items: center;
}

.mobile-nav-buttons .btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
}

/* 移动端关闭按钮 */
.mobile-nav-close {
    position: absolute;
    top: 24px;
    right: 24px;
    background: none;
    border: none;
    color: white;
    font-size: 2rem;
    cursor: pointer;
    padding: 8px;
    transition: var(--transition);
}

.mobile-nav-close:hover {
    color: var(--primary-purple);
    transform: scale(1.1);
}

.nav-buttons {
    display: flex;
    gap: 12px;
    align-items: center;
}

/* 右上角三角推荐标签 */
.card-recommended {
    position: relative;
    overflow: hidden;
}

.card-recommended::before {
    content: "推荐";
    position: absolute;
    top: 16px;
    right: -20px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white;
    padding: 6px 32px;
    font-size: 12px;
    font-weight: 600;
    transform: rotate(45deg);
    z-index: 10;
    box-shadow: 0 2px 8px rgba(139, 92, 246, 0.3);
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    line-height: 1.5;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-purple);
    border: 1px solid var(--border-default);
}

.btn-secondary:hover {
    background-color: var(--light-purple);
    border-color: var(--primary-purple);
}

.btn-large {
    padding: 12px 24px;
    font-size: 16px;
}

.btn-ghost {
    background-color: transparent;
    color: var(--text-secondary);
    border: none;
    padding: 8px 12px;
}

.btn-ghost:hover {
    color: var(--text-primary);
    background-color: var(--background-secondary);
}

/* 主要内容 */
.main-content {
    margin-top: 72px;
}

/* 英雄区域 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="20" height="20" patternUnits="userSpaceOnUse"><path d="M 20 0 L 0 0 0 20" fill="none" stroke="%23ffffff" stroke-width="0.5" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 24px;
    line-height: 1.1;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 40px;
    opacity: 0.9;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-buttons .btn {
    min-width: 150px;
}

/* 区块样式 */
.section {
    padding: 100px 0;
}

.section-alt {
    background-color: var(--background-secondary);
}

.section-title {
    text-align: center;
    margin-bottom: 80px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.section-title h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
    line-height: 1.2;
}

.section-title p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 网格布局 */
.grid {
    display: grid;
    gap: 32px;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* 卡片 */
.card {
    background: var(--background-primary);
    border-radius: var(--border-radius);
    padding: 32px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: var(--transition);
    height: 100%;
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    background: var(--gradient-1);
}

.card-icon i {
    font-size: 24px;
    color: white;
}

.card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
}

.card-link {
    color: var(--primary-purple);
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
}

.card-link:hover {
    text-decoration: underline;
}

/* 特性展示 */
.feature {
    display: flex;
    align-items: center;
    gap: 80px;
    margin-bottom: 100px;
}

.feature:last-child {
    margin-bottom: 0;
}

.feature-reverse {
    flex-direction: row-reverse;
}

.feature-content {
    flex: 1;
    min-width: 400px;
}

.feature-content h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.feature-content p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 24px;
}

.feature-list {
    list-style: none;
    margin-bottom: 32px;
}

.feature-list li {
    display: flex;
    align-items: flex-start;
    margin-bottom: 16px;
    font-size: 1rem;
    color: var(--text-secondary);
}

.feature-list li::before {
    content: '✓';
    color: var(--primary-green);
    font-weight: bold;
    margin-right: 12px;
    margin-top: 2px;
    flex-shrink: 0;
}

.feature-image {
    flex: 1;
    min-width: 400px;
}

.feature-image img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
}

/* 统计数据 */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    text-align: center;
    margin: 80px 0;
}

.stat {
    padding: 24px;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* 客户案例 */
.case-study {
    background: var(--background-primary);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: var(--transition);
}

.case-study:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.case-image {
    height: 200px;
    background: var(--gradient-1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 48px;
}

.case-content {
    padding: 24px;
}

.case-content h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.case-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
}

.case-metrics {
    display: flex;
    gap: 24px;
    border-top: 1px solid var(--border-light);
    padding-top: 20px;
}

.metric {
    text-align: center;
    flex: 1;
}

.metric-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-purple);
    display: block;
}

.metric-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* 页脚 */
.footer {
    background-color: var(--text-primary);
    color: white;
    padding: 80px 0 40px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    margin-bottom: 16px;
}

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

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

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 32px;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 8px;
}

/* 联系表单 */
.contact-form {
    background: var(--background-primary);
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-light);
    border-radius: 6px;
    font-size: 14px;
    transition: var(--transition);
    background-color: var(--background-primary);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-purple);
    box-shadow: 0 0 0 3px rgba(99, 91, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .navbar .container {
        height: 64px;
    }
    
    .navbar {
        height: 64px;
    }
    
    .main-content {
        margin-top: 64px;
    }
    
    .nav-menu {
        display: none;
    }
    
    .hero {
        padding: 80px 0 60px;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero p {
        font-size: 1.125rem;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-title h2 {
        font-size: 2rem;
    }
    
    .section-title {
        margin-bottom: 60px;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .feature {
        flex-direction: column;
        gap: 40px;
        margin-bottom: 60px;
    }
    
    .feature-reverse {
        flex-direction: column;
    }
    
    .feature-content,
    .feature-image {
        min-width: auto;
    }
    
    .stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
        margin: 60px 0;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-buttons .btn {
        width: 100%;
        max-width: 280px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .section-title h2 {
        font-size: 1.75rem;
    }
    
    .card {
        padding: 24px;
    }
    
    .contact-form {
        padding: 24px;
    }
    
    .stats {
        grid-template-columns: 1fr;
    }
}

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 工具类 */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.mb-5 { margin-bottom: 40px; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mt-5 { margin-top: 40px; }

/* ===== 行业资讯模块样式 ===== */

/* 页面头部 */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 120px 0 80px;
    text-align: center;
}

.page-title h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.page-title p {
    font-size: 1.25rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* 资讯分类标签 */
.news-categories {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.category-tab {
    padding: 12px 24px;
    border: 2px solid var(--border-default);
    background: transparent;
    color: var(--text-secondary);
    border-radius: 25px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
}

.category-tab:hover {
    border-color: var(--primary-purple);
    color: var(--primary-purple);
}

.category-tab.active {
    background: var(--gradient-1);
    border-color: transparent;
    color: white;
    box-shadow: var(--shadow-md);
}

/* 资讯网格 */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 32px;
    margin-bottom: 60px;
}

.news-item {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-light);
}

.news-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.news-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.news-item:hover .news-image img {
    transform: scale(1.05);
}

.news-content {
    padding: 24px;
}

.news-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    font-size: 14px;
}

.news-category {
    background: var(--gradient-1);
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.news-date {
    color: var(--text-muted);
}

.news-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 16px;
    line-height: 1.4;
    color: var(--text-primary);
}

.news-excerpt {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
}

.news-link {
    color: var(--primary-purple);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.news-link:hover {
    color: var(--dark-purple);
    gap: 12px;
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
}

.page-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
}

.page-link:hover {
    border-color: var(--primary-purple);
    color: var(--primary-purple);
}

.page-link.active {
    background: var(--gradient-1);
    border-color: transparent;
    color: white;
}

.page-link:last-child {
    width: auto;
    padding: 0 16px;
}

/* 热门资讯 */
.hot-news {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.hot-news-item {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: white;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-light);
    transition: var(--transition);
}

.hot-news-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.hot-news-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-purple);
    line-height: 1;
    min-width: 40px;
}

.hot-news-content h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
    line-height: 1.4;
}

.hot-news-content p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
}

/* ===== 资讯详情页样式 ===== */

/* 面包屑导航 */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    font-size: 14px;
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

.breadcrumb a:hover {
    color: white;
}

.breadcrumb i {
    color: rgba(255, 255, 255, 0.6);
    font-size: 12px;
}

.breadcrumb span {
    color: rgba(255, 255, 255, 0.6);
}

/* 文章元信息 */
.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 24px;
    font-size: 14px;
}

.article-category {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-weight: 500;
}

.article-date,
.article-author,
.article-read-time {
    color: rgba(255, 255, 255, 0.8);
}

/* 文章标题 */
.article-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 24px;
    line-height: 1.2;
    color: white;
}

/* 文章摘要 */
.article-summary {
    max-width: 700px;
    margin-bottom: 40px;
}

.article-summary p {
    font-size: 1.125rem;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.9);
}

/* 文章内容布局 */
.article-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    margin-top: 60px;
}

/* 文章主体 */
.article-body {
    background: white;
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: var(--shadow-sm);
}

.article-body h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin: 40px 0 20px 0;
    color: var(--text-primary);
    line-height: 1.3;
}

.article-body h2:first-child {
    margin-top: 0;
}

.article-body h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 30px 0 16px 0;
    color: var(--text-primary);
}

.article-body p {
    margin-bottom: 20px;
    line-height: 1.7;
    color: var(--text-secondary);
}

.article-body ul {
    margin: 20px 0;
    padding-left: 24px;
}

.article-body li {
    margin-bottom: 12px;
    line-height: 1.6;
    color: var(--text-secondary);
}

.article-body strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* 文章图片 */
.article-image {
    margin: 30px 0;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.article-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* 文章结论 */
.article-conclusion {
    background: var(--background-secondary);
    padding: 24px;
    border-radius: var(--border-radius);
    margin: 40px 0;
    border-left: 4px solid var(--primary-purple);
}

.article-conclusion h3 {
    margin-top: 0;
    color: var(--primary-purple);
}

/* 文章标签 */
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 30px 0;
}

.tag {
    background: var(--background-secondary);
    color: var(--text-secondary);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

.tag:hover {
    background: var(--primary-purple);
    color: white;
}

/* 分享按钮 */
.article-share {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 30px 0;
    padding-top: 20px;
    border-top: 1px solid var(--border-light);
}

.article-share span {
    color: var(--text-muted);
    font-size: 14px;
}

.share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    color: white;
    text-decoration: none;
    transition: var(--transition);
    font-size: 16px;
}

.share-btn.wechat { background: #07c160; }
.share-btn.weibo { background: #e6162d; }
.share-btn.linkedin { background: #0077b5; }
.share-btn.twitter { background: #1da1f2; }

.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 侧边栏 */
.article-sidebar {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

/* 作者信息 */
.author-info {
    background: white;
    border-radius: var(--border-radius);
    padding: 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
}

.author-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 16px;
}

.author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.author-info h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.author-info p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: 20px;
}

/* 相关文章 */
.related-articles {
    background: white;
    border-radius: var(--border-radius);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
}

.related-articles h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.related-article-item {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-light);
}

.related-article-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.related-article-item img {
    width: 100px;
    height: 60px;
    border-radius: var(--border-radius);
    object-fit: cover;
}

.related-article-content h5 {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    line-height: 1.4;
}

.related-article-content h5 a {
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
}

.related-article-content h5 a:hover {
    color: var(--primary-purple);
}

.related-article-date {
    font-size: 12px;
    color: var(--text-muted);
}

/* 热门标签 */
.popular-tags {
    background: white;
    border-radius: var(--border-radius);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
}

.popular-tags h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-cloud .tag {
    background: var(--background-secondary);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 16px;
    font-size: 12px;
    text-decoration: none;
    transition: var(--transition);
}

.tag-cloud .tag:hover {
    background: var(--primary-purple);
    color: white;
}

/* 推荐阅读 */
.recommended-news {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .article-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .news-grid {
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    }
}

/* 导航栏移动端样式 */
@media (max-width: 768px) {
    .navbar .container {
        padding: 0 16px;
    }
    
    .nav-menu {
        display: none;
    }
    
    .nav-buttons {
        display: none;
    }
    
    /* 显示汉堡菜单 */
    .hamburger {
        display: flex;
    }
    
    /* 显示移动端导航 */
    .mobile-nav {
        display: block;
    }
}

@media (max-width: 768px) {
    .page-title h1 {
        font-size: 2rem;
    }
    
    .article-title {
        font-size: 1.75rem;
    }
    
    .article-body {
        padding: 24px;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .hot-news {
        grid-template-columns: 1fr;
    }
    
    .news-categories {
        gap: 12px;
    }
    
    .category-tab {
        padding: 10px 20px;
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    .page-header {
        padding: 80px 0 60px;
    }
    
    .article-meta {
        flex-direction: column;
        gap: 12px;
    }
    
    .article-body {
        padding: 20px;
    }
    
    .article-body h2 {
        font-size: 1.5rem;
    }
    
    .article-body h3 {
        font-size: 1.25rem;
    }
}