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

/* 基础字体和颜色设置 */
:root {
    --color-primary: #000000;
    --color-secondary: #666666;
    --color-background: #ffffff;
    --color-accent: #0066cc;
    --color-border: #e5e5e5;
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --max-width: 1200px;
    --padding: 40px;
    --card-gap: 24px;
    --border-radius: 8px;
    --shadow-light: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-medium: 0 4px 8px rgba(0,0,0,0.15);
    --transition: all 0.3s ease;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--color-primary);
    background-color: var(--color-background);
}

/* 容器样式 */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--padding);
}

/* 导航栏样式 */
.navbar {
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--padding);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-links {
    display: flex;
    gap: 32px;
}

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

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -21px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--color-primary);
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-primary);
    transition: var(--transition);
}

/* 主要内容区域 */
.main-content {
    min-height: calc(100vh - 160px);
}

/* Hero区域样式 */
.hero-section {
    padding: 80px 0 60px;
    text-align: center;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 24px;
    line-height: 1.2;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--color-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* 区域标题样式 */
.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 32px;
    color: var(--color-primary);
}

/* 社交链接区域 */
.social-section {
    margin-bottom: 80px;
}

.social-card {
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 32px;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.social-info h3 {
    font-size: 0.875rem;
    color: var(--color-secondary);
    font-weight: 500;
    margin-bottom: 8px;
}

.social-info h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.social-info p {
    color: var(--color-secondary);
    font-size: 0.875rem;
}

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

.social-link {
    padding: 8px 16px;
    border: 1px solid var(--color-border);
    border-radius: 20px;
    text-decoration: none;
    color: var(--color-primary);
    font-size: 0.875rem;
    transition: var(--transition);
}

.social-link:hover {
    background-color: var(--color-primary);
    color: var(--color-background);
}

/* 项目展示区域 */
.projects-section,
.articles-section {
    margin-bottom: 80px;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--card-gap);
    margin-bottom: 32px;
}

.project-card {
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
}

.project-card:hover {
    box-shadow: var(--shadow-medium);
    transform: translateY(-4px);
}

.project-image {
    height: 200px;
    background-color: #f8f8f8;
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-image {
    font-size: 3rem;
    opacity: 0.3;
}

.project-info {
    padding: 24px;
}

.project-info h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.project-info p {
    color: var(--color-secondary);
    margin-bottom: 12px;
    font-size: 0.875rem;
}

.project-date {
    font-size: 0.75rem;
    color: var(--color-secondary);
    font-weight: 500;
}

/* 文章区域 */
.articles-grid {
    display: grid;
    gap: var(--card-gap);
    margin-bottom: 32px;
}

.article-card {
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 32px;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
}

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

.article-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.article-content p {
    color: var(--color-secondary);
    margin-bottom: 16px;
    line-height: 1.7;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.article-date {
    font-size: 0.875rem;
    color: var(--color-secondary);
}

.article-link {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
}

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

/* 查看更多链接 */
.view-more {
    text-align: center;
}

.view-more-link {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
    padding: 12px 24px;
    border: 1px solid var(--color-accent);
    border-radius: 24px;
    transition: var(--transition);
    display: inline-block;
}

.view-more-link:hover {
    background-color: var(--color-accent);
    color: var(--color-background);
}

/* 邮件订阅区域 */
.newsletter-section {
    margin-bottom: 80px;
}

.newsletter-card {
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 40px;
    text-align: center;
    box-shadow: var(--shadow-light);
}

.newsletter-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.newsletter-card p {
    color: var(--color-secondary);
    margin-bottom: 24px;
}

.newsletter-form {
    display: flex;
    gap: 12px;
    max-width: 400px;
    margin: 0 auto 16px;
}

.newsletter-input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: 24px;
    font-size: 0.875rem;
    outline: none;
    transition: var(--transition);
}

.newsletter-input:focus {
    border-color: var(--color-accent);
}

.newsletter-button {
    padding: 12px 24px;
    background-color: var(--color-primary);
    color: var(--color-background);
    border: none;
    border-radius: 24px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.newsletter-button:hover {
    background-color: var(--color-secondary);
}

.newsletter-count {
    font-size: 0.875rem;
    color: var(--color-secondary);
}

/* 页脚样式 */
.footer {
    border-top: 1px solid var(--color-border);
    padding: 40px 0;
    text-align: center;
    color: var(--color-secondary);
    font-size: 0.875rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    :root {
        --padding: 20px;
        --card-gap: 16px;
    }
    
    .nav-links {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .social-card {
        flex-direction: column;
        text-align: center;
        gap: 24px;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .article-meta {
        flex-direction: column;
        gap: 8px;
        align-items: flex-start;
    }
}

/* About页面样式 */
.about-hero {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
    padding: 60px 0;
}

.about-content h1 {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 32px;
}

.about-description p {
    color: var(--color-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
    font-size: 1.125rem;
}

.placeholder-avatar {
    width: 280px;
    height: 350px;
    background-color: #f8f8f8;
    border-radius: var(--border-radius);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--color-border);
}

.placeholder-avatar span {
    font-size: 4rem;
    margin-bottom: 16px;
    opacity: 0.5;
}

.placeholder-avatar p {
    color: var(--color-secondary);
    font-size: 0.875rem;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--card-gap);
    margin-bottom: 80px;
}

.skill-card {
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 32px;
    text-align: center;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
}

.skill-card:hover {
    box-shadow: var(--shadow-medium);
    transform: translateY(-4px);
}

.skill-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: block;
}

.skill-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

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

.skill-tools {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.skill-tools span {
    background-color: #f0f0f0;
    color: var(--color-primary);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

.philosophy-quote {
    font-size: 1.25rem;
    font-style: italic;
    text-align: center;
    color: var(--color-primary);
    margin-bottom: 40px;
    padding: 40px;
    border-left: 4px solid var(--color-primary);
    background-color: #f9f9f9;
    border-radius: var(--border-radius);
}

.philosophy-points {
    display: grid;
    gap: 32px;
}

.philosophy-point h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.philosophy-point p {
    color: var(--color-secondary);
    line-height: 1.7;
}

.timeline {
    position: relative;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--color-border);
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -27px;
    top: 8px;
    width: 12px;
    height: 12px;
    background-color: var(--color-primary);
    border-radius: 50%;
}

.timeline-date {
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: 8px;
}

.timeline-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.timeline-content p {
    color: var(--color-secondary);
    line-height: 1.6;
}

.contact-preview {
    margin-bottom: 80px;
}

.contact-card {
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 40px;
    text-align: center;
    box-shadow: var(--shadow-light);
}

.contact-button {
    display: inline-block;
    margin-top: 20px;
    padding: 12px 32px;
    background-color: var(--color-primary);
    color: var(--color-background);
    text-decoration: none;
    border-radius: 24px;
    font-weight: 500;
    transition: var(--transition);
}

.contact-button:hover {
    background-color: var(--color-secondary);
}

/* Projects页面样式 */
.page-header {
    text-align: center;
    margin-bottom: 60px;
    padding: 60px 0 40px;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.page-header p {
    font-size: 1.125rem;
    color: var(--color-secondary);
}

.filter-section {
    margin-bottom: 60px;
}

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

.filter-btn {
    padding: 8px 20px;
    border: 1px solid var(--color-border);
    background-color: var(--color-background);
    color: var(--color-secondary);
    border-radius: 20px;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--color-primary);
    color: var(--color-background);
    border-color: var(--color-primary);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--card-gap);
    margin-bottom: 80px;
}

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

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

.gallery-image {
    height: 250px;
    background-color: #f8f8f8;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gallery-info {
    padding: 24px;
}

.gallery-info h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.gallery-info p {
    color: var(--color-secondary);
    font-size: 0.875rem;
    margin-bottom: 12px;
}

.gallery-tag {
    background-color: #f0f0f0;
    color: var(--color-primary);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--card-gap);
    text-align: center;
}

.stat-item h3 {
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.stat-item p {
    color: var(--color-secondary);
    font-weight: 500;
}

/* Articles页面样式 */
.articles-list {
    max-width: 800px;
    margin: 0 auto;
}

.article-item {
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 40px;
    margin-bottom: 32px;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
}

.article-item:hover {
    box-shadow: var(--shadow-medium);
    transform: translateY(-2px);
}

.article-meta-top {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
}

.article-date {
    color: var(--color-secondary);
    font-size: 0.875rem;
}

.article-category {
    background-color: var(--color-primary);
    color: var(--color-background);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

.article-item h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 16px;
    line-height: 1.3;
}

.article-item p {
    color: var(--color-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
}

.article-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.read-more {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
}

.read-more:hover {
    text-decoration: underline;
}

.article-tags {
    display: flex;
    gap: 8px;
}

.tag {
    background-color: #f0f0f0;
    color: var(--color-primary);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

/* Contact页面样式 */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.contact-card,
.resume-card {
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 32px;
    box-shadow: var(--shadow-light);
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact-icon {
    font-size: 1.5rem;
    width: 40px;
    text-align: center;
}

.contact-details h4 {
    font-weight: 600;
    margin-bottom: 4px;
}

.contact-details p {
    color: var(--color-secondary);
    font-size: 0.875rem;
}

.resume-download-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 12px 24px;
    background-color: var(--color-primary);
    color: var(--color-background);
    text-decoration: none;
    border-radius: 24px;
    font-weight: 500;
    transition: var(--transition);
    margin-bottom: 12px;
}

.resume-download-btn:hover {
    background-color: var(--color-secondary);
}

.social-platforms {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--card-gap);
    margin-bottom: 60px;
}

.platform-link {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px;
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--color-primary);
    box-shadow: var(--shadow-light);
    transition: var(--transition);
}

.platform-link:hover {
    box-shadow: var(--shadow-medium);
    transform: translateY(-2px);
}

.platform-icon {
    font-size: 2rem;
}

.platform-info h4 {
    font-weight: 600;
    margin-bottom: 4px;
}

.platform-info p {
    color: var(--color-secondary);
    font-size: 0.875rem;
}

.form-container {
    max-width: 600px;
    margin: 0 auto;
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: var(--shadow-light);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 500;
    color: var(--color-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-family: var(--font-family);
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

.submit-btn {
    padding: 12px 32px;
    background-color: var(--color-primary);
    color: var(--color-background);
    border: none;
    border-radius: 24px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    align-self: flex-start;
}

.submit-btn:hover {
    background-color: var(--color-secondary);
}

@media (max-width: 768px) {
    .about-hero {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .placeholder-avatar {
        width: 200px;
        height: 250px;
        margin: 0 auto;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .filter-buttons {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 8px;
    }
    
    .social-platforms {
        grid-template-columns: 1fr;
    }
    
    .article-footer {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .hero-section {
        padding: 40px 0 30px;
    }
    
    .section-title {
        font-size: 1.25rem;
    }
    
    .social-card,
    .article-card,
    .newsletter-card {
        padding: 24px;
    }
    
    .project-info {
        padding: 20px;
    }
    
    .page-header {
        padding: 40px 0 20px;
    }
    
    .page-header h1 {
        font-size: 2rem;
    }
    
    .about-content h1 {
        font-size: 2rem;
    }
    
    .skill-card,
    .article-item,
    .form-container {
        padding: 24px;
    }
}