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

:root {
    --primary-blue: #2563eb;
    --dark-blue: #1a365d;
    --text-color: #1f2937;
    --light-gray: #6b7280;
    --bg-gray: #f3f4f6;
    --white: #ffffff;
    --line-height: 1.7;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-color);
    line-height: var(--line-height);
    background-color: var(--white);
    padding-top: 80px;
}

/* 顶部装饰条 */
.top-decoration {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 80px;
    z-index: 1000;
    overflow: hidden;
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
}

.top-decoration svg {
    width: 100%;
    height: 100%;
    display: block;
}

/* 头部区域 */
.header {
    background: var(--white);
    border-bottom: 1px solid #e5e7eb;
    position: sticky;
    top: 80px;
    z-index: 999;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.blog-identity {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid var(--primary-blue);
    object-fit: cover;
}

.avatar-container {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid var(--primary-blue);
    overflow: hidden;
    flex-shrink: 0;
}

.avatar-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.blog-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-blue);
    text-decoration: none;
}

.navigation {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.navigation a {
    text-decoration: none;
    color: var(--primary-blue);
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    position: relative;
}

.navigation a:hover {
    color: var(--dark-blue);
}

.navigation a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-blue);
    transition: width 0.2s ease;
}

.navigation a:hover::after {
    width: 100%;
}

.lang-switch {
    background: transparent;
    color: var(--light-gray);
    border: 1px solid #e5e7eb;
    padding: 0.35rem 0.75rem;
    border-radius: 4px;
    font-weight: 400;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: 'Inter', sans-serif;
}

.lang-switch:hover {
    color: var(--primary-blue);
    border-color: var(--primary-blue);
    background: #f8fafc;
}

/* 文章主体区 */
.main-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

/* 文章卡片样式 */
.article-card {
    background: var(--white);
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
    transition: all 0.3s ease;
}

.article-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    border-color: var(--primary-blue);
    transform: translateY(-2px);
}

.article-header {
    margin-bottom: 1.5rem;
}

.article-title {
    font-family: 'Georgia', serif;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--dark-blue);
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.article-title a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

.article-title a:hover {
    color: var(--primary-blue);
}

.article-date {
    color: var(--light-gray);
    font-size: 0.875rem;
    margin: 0;
}

.article-excerpt {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-color);
    margin-bottom: 1.5rem;
}

.article-excerpt p {
    margin: 0;
}

.article-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1.5rem;
    border-top: 1px solid #e5e7eb;
}

.read-more {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

.read-more:hover {
    color: var(--dark-blue);
}

/* 简洁文章列表样式 */
.article-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.article-list-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 1.25rem 0;
    border-bottom: 1px solid #e5e7eb;
    transition: background-color 0.2s ease;
}

.article-list-item:hover {
    background-color: #f9fafb;
    margin-left: -1rem;
    margin-right: -1rem;
    padding-left: 1rem;
    padding-right: 1rem;
}

.article-list-item:last-child {
    border-bottom: none;
}

.article-list-date {
    font-size: 0.95rem;
    color: var(--light-gray);
    font-style: italic;
    min-width: 100px;
    flex-shrink: 0;
    padding-top: 0.1rem;
}

.article-list-content {
    flex: 1;
}

.article-list-title {
    font-family: 'Georgia', serif;
    font-size: 1.25rem;
    font-weight: 400;
    margin: 0 0 0.35rem 0;
    line-height: 1.4;
}

.article-list-title a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: color 0.2s ease;
}

.article-list-title a:hover {
    color: var(--dark-blue);
    text-decoration: underline;
}

.article-list-subtitle {
    font-size: 1rem;
    color: var(--text-color);
    margin: 0;
    line-height: 1.5;
}

/* 查看所有文章按钮 */
.view-all {
    text-align: center;
    padding: 2rem 0;
    margin-top: 1rem;
}

.view-all-link {
    display: inline-block;
    background: transparent;
    color: var(--light-gray);
    text-decoration: none;
    padding: 0.5rem 0;
    font-weight: 400;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    border-bottom: 1px solid transparent;
}

.view-all-link:hover {
    color: var(--primary-blue);
    border-bottom: 1px solid var(--primary-blue);
}

/* 完整文章样式（用于文章详情页） */
.article {
    background: var(--white);
}

.article-body {
    font-size: 1.05rem;
    line-height: 1.8;
}

.article-body p {
    margin-bottom: 1.5rem;
}

.article-body h2 {
    font-family: 'Georgia', serif;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--dark-blue);
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.article-body a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: all 0.2s ease;
    border-bottom: 1px solid transparent;
}

.article-body a:hover {
    border-bottom: 1px solid var(--primary-blue);
}

.article-body em {
    font-style: italic;
    color: var(--text-color);
}

.article-body blockquote {
    border-left: 4px solid var(--primary-blue);
    padding-left: 1.5rem;
    margin: 2rem 0;
    font-style: italic;
    color: var(--light-gray);
    font-size: 1.1rem;
}

.article-body pre {
    background-color: var(--bg-gray);
    padding: 1.25rem;
    border-radius: 4px;
    overflow-x: auto;
    margin: 1.5rem 0;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
}

.article-body code {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9rem;
}

/* 归档页面样式 */
.page-title {
    font-family: 'Georgia', serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark-blue);
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #e5e7eb;
}

.archive-section {
    margin-bottom: 2.5rem;
}

.archive-month {
    font-family: 'Georgia', serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark-blue);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #e5e7eb;
}

.archive-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.archive-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid #f3f4f6;
    transition: all 0.2s ease;
}

.archive-item:hover {
    background-color: #f9fafb;
    padding-left: 0.5rem;
    padding-right: 0.5rem;
    margin-left: -0.5rem;
    margin-right: -0.5rem;
}

.archive-item a {
    text-decoration: none;
    color: var(--text-color);
    font-size: 1.05rem;
    font-weight: 500;
    transition: color 0.2s ease;
    flex: 1;
}

.archive-item a:hover {
    color: var(--primary-blue);
}

.archive-date {
    color: var(--light-gray);
    font-size: 0.9rem;
    white-space: nowrap;
    margin-left: 1rem;
}

/* 项目页面样式 */
.page-intro {
    font-size: 1.1rem;
    color: var(--text-color);
    line-height: 1.7;
    margin-bottom: 2.5rem;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.project-card {
    background: var(--white);
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.project-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    border-color: var(--primary-blue);
    transform: translateY(-2px);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.project-title {
    font-family: 'Georgia', serif;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--dark-blue);
    margin: 0;
}

.project-title a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

.project-title a:hover {
    color: var(--primary-blue);
}

.project-badges {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
}

.badge {
    padding: 0.25rem 0.6rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-python {
    background: #3b82f6;
    color: white;
}

.badge-star {
    background: #fbbf24;
    color: #1f2937;
}

.project-description {
    color: var(--text-color);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.project-links {
    display: flex;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #e5e7eb;
}

.project-links a {
    color: var(--primary-blue);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

.project-links a:hover {
    color: var(--dark-blue);
}

/* 关于页面样式 */
.about-content {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.about-avatar-section {
    text-align: center;
}

.about-avatar {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    border: 4px solid var(--primary-blue);
    margin: 0 auto 1.5rem;
    object-fit: cover;
}

.avatar-container-large {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    border: 4px solid var(--primary-blue);
    margin: 0 auto 1.5rem;
    overflow: hidden;
}

.avatar-video-large {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.about-text {
    font-size: 1.05rem;
    line-height: 1.8;
}

.about-text p {
    margin-bottom: 1.5rem;
}

.about-text h2 {
    font-family: 'Georgia', serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark-blue);
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.about-text ul {
    margin-left: 1.5rem;
    margin-bottom: 1.5rem;
}

.about-text li {
    margin-bottom: 0.5rem;
}

.contact-links {
    display: flex;
    gap: 1.5rem;
    margin-top: 1rem;
}

.contact-links a {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.contact-links a:hover {
    color: var(--dark-blue);
}

@media (max-width: 768px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .about-avatar {
        width: 150px;
        height: 150px;
    }
}

/* 文章详情页样式 */
.article-title-full {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.article-nav {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid #e5e7eb;
}

.nav-next, .nav-prev {
    display: inline-block;
    padding: 1rem 1.5rem;
    background: var(--primary-blue);
    color: var(--white);
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.nav-next:hover, .nav-prev:hover {
    background: var(--dark-blue);
    transform: translateY(-2px);
}

.nav-prev {
    margin-right: 1rem;
}

/* 标签区 */
.article-tags {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid #e5e7eb;
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.tag {
    background-color: var(--bg-gray);
    color: var(--light-gray);
    padding: 0.4rem 0.9rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.tag:hover {
    background-color: #e5e7eb;
    color: var(--text-color);
}

/* 底部 */
.footer {
    background: var(--bg-gray);
    border-top: 1px solid #e5e7eb;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    text-align: center;
}

.copyright {
    color: var(--light-gray);
    font-size: 0.875rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .navigation {
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    .article-title {
        font-size: 2rem;
    }
    
    .article-body {
        font-size: 1rem;
    }
    
    .main-content {
        padding: 2rem 1.5rem;
    }
}

@media (max-width: 480px) {
    .top-decoration {
        height: 60px;
    }
    
    body {
        padding-top: 60px;
    }
    
    .header {
        top: 60px;
    }
    
    .navigation {
        font-size: 0.9rem;
    }
    
    .article-title {
        font-size: 1.75rem;
    }
    
    .article-body h2 {
        font-size: 1.5rem;
    }
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 选中文本样式 */
::selection {
    background-color: var(--primary-blue);
    color: var(--white);
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-gray);
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}