/* ========== 全局样式 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: #f5f7fa;
    color: #333;
    line-height: 1.7;
    min-height: 100vh;
}

a {
    text-decoration: none;
    color: #1e88e5;
    transition: color 0.3s;
}

a:hover {
    color: #1565c0;
}

img {
    max-width: 100%;
}

/* ========== 顶部导航栏 ========== */
.navbar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 60px;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 20px;
}

.nav-center {
    display: flex;
    justify-content: center;
}

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

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

.nav-icon-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    color: rgba(255, 255, 255, 0.85);
    transition: background 0.3s, color 0.3s;
}

.nav-icon-link:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}

.nav-icon-link svg {
    width: 18px;
    height: 18px;
}

.nav-menu-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: #fff;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s;
    padding: 0;
}

.nav-menu-btn:hover {
    background: rgba(255, 255, 255, 0.35);
}

.nav-logo {
    position: relative;
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 2px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 160px;
    height: 44px;
    border-radius: 8px;
    background: transparent;
    transition: all 0.3s ease;
    text-decoration: none;
}

.nav-logo:hover {
    background: rgba(255, 255, 255, 0.25);
    color: #fff;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transform: scale(1.02);
}

.nav-menu {
    display: flex;
    gap: 30px;
    list-style: none;
}

.nav-menu a {
    color: rgba(255, 255, 255, 0.9);
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: #fff;
}

.nav-menu a.active::after {
    content: '';
    display: block;
    width: 100%;
    height: 2px;
    background: #fff;
    margin-top: 4px;
}

/* ========== 主要布局 ========== */
.main-container {
    max-width: 1200px;
    margin: 30px auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 30px;
}

.content-area {
    min-width: 0;
}

/* ========== 文章列表 ========== */
.post-card {
    background: #fff;
    border-radius: 8px;
    padding: 30px;
    margin-bottom: 24px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
}

.post-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
}

.post-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
}

.post-title a {
    color: #1a202c;
}

.post-title a:hover {
    color: #667eea;
}

.post-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    color: #718096;
    font-size: 13px;
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid #e2e8f0;
}

.post-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.post-meta .icon {
    font-size: 14px;
}

.post-summary {
    color: #4a5568;
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 16px;
}

.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.tag {
    background: #edf2f7;
    color: #4a5568;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 12px;
    transition: background 0.3s, color 0.3s;
}

.tag:hover {
    background: #667eea;
    color: #fff;
}

.category-badge {
    background: #f0f4ff;
    color: #667eea;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.read-more {
    display: inline-block;
    margin-left: auto;
    color: #667eea;
    font-weight: 500;
    font-size: 14px;
}

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

/* ========== 侧边栏 ========== */
.sidebar {
    min-width: 0;
}

.sidebar-widget {
    background: #fff;
    border-radius: 8px;
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.widget-title {
    font-size: 17px;
    font-weight: 600;
    color: #1a202c;
    margin-bottom: 18px;
    padding-bottom: 12px;
    border-bottom: 2px solid #667eea;
    display: inline-block;
}

/* 博主信息 */
.author-card {
    text-align: center;
}

.author-avatar {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 32px;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.author-name {
    font-size: 18px;
    font-weight: 600;
    color: #1a202c;
    margin-bottom: 8px;
}

.author-bio {
    color: #718096;
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 16px;
}

.author-stats {
    display: flex;
    justify-content: space-around;
    padding-top: 16px;
    border-top: 1px solid #e2e8f0;
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-size: 20px;
    font-weight: 700;
    color: #667eea;
}

.stat-label {
    font-size: 12px;
    color: #718096;
}

/* 分类列表 */
.category-list,
.tag-list,
.archive-list {
    list-style: none;
}

.category-list li,
.archive-list li {
    padding: 10px 0;
    border-bottom: 1px dashed #e2e8f0;
}

.category-list li:last-child,
.archive-list li:last-child {
    border-bottom: none;
}

.category-list a,
.archive-list a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #4a5568;
    font-size: 14px;
}

.category-list a:hover,
.archive-list a:hover {
    color: #667eea;
}

.category-count {
    background: #edf2f7;
    color: #718096;
    padding: 2px 10px;
    border-radius: 10px;
    font-size: 12px;
}

/* 热门标签 */
.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag-list .tag {
    cursor: pointer;
}

/* ========== 文章详情页 ========== */
.post-detail {
    background: #fff;
    border-radius: 8px;
    padding: 40px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.post-detail .post-title {
    font-size: 30px;
    color: #1a202c;
    margin-bottom: 20px;
    line-height: 1.4;
}

.post-detail .post-meta {
    margin-bottom: 30px;
}

.post-content {
    font-size: 16px;
    line-height: 1.9;
    color: #2d3748;
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4 {
    margin-top: 30px;
    margin-bottom: 16px;
    color: #1a202c;
    font-weight: 600;
}

.post-content h1 {
    font-size: 26px;
    padding-bottom: 10px;
    border-bottom: 2px solid #e2e8f0;
}

.post-content h2 {
    font-size: 22px;
    padding-left: 12px;
    border-left: 4px solid #667eea;
}

.post-content h3 {
    font-size: 18px;
}

.post-content p {
    margin-bottom: 16px;
    text-align: justify;
}

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

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

.post-content code {
    background: #f1f3f5;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: "Consolas", "Monaco", "Courier New", monospace;
    font-size: 14px;
    color: #e83e8c;
}

.post-content pre {
    background: #1e1e1e;
    color: #d4d4d4;
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 20px 0;
    font-size: 14px;
    line-height: 1.6;
}

.post-content pre code {
    background: transparent;
    color: inherit;
    padding: 0;
    font-size: inherit;
}

.post-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.post-content th,
.post-content td {
    border: 1px solid #e2e8f0;
    padding: 12px;
    text-align: left;
}

.post-content th {
    background: #f7fafc;
    font-weight: 600;
    color: #1a202c;
}

.post-content tr:nth-child(even) td {
    background: #fafafa;
}

.post-content blockquote {
    border-left: 4px solid #667eea;
    background: #f8f9ff;
    padding: 16px 20px;
    margin: 20px 0;
    color: #4a5568;
    border-radius: 0 4px 4px 0;
}

/* ========== 分类/标签/归档页面 ========== */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 60px 20px;
    text-align: center;
    margin-bottom: 30px;
    border-radius: 8px;
}

.page-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 10px;
}

.page-subtitle {
    font-size: 16px;
    opacity: 0.9;
}

.archive-group {
    margin-bottom: 30px;
}

.archive-year {
    font-size: 24px;
    font-weight: 600;
    color: #1a202c;
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid #e2e8f0;
}

/* ========== 搜索功能 ========== */
.search-box {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.3s;
    outline: none;
}

.search-box:focus {
    border-color: #667eea;
}

.no-results {
    text-align: center;
    padding: 60px 20px;
    color: #718096;
    background: #fff;
    border-radius: 8px;
}

.no-results-icon {
    font-size: 60px;
    margin-bottom: 20px;
}

/* ========== 关于页面 ========== */
.about-page {
    background: #fff;
    border-radius: 8px;
    padding: 50px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.about-header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid #e2e8f0;
}

.about-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 48px;
    font-weight: 700;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.about-name {
    font-size: 28px;
    font-weight: 700;
    color: #1a202c;
    margin-bottom: 10px;
}

.about-intro {
    color: #4a5568;
    font-size: 16px;
    max-width: 600px;
    margin: 0 auto;
}

.about-section {
    margin-bottom: 35px;
}

.about-section h2 {
    font-size: 22px;
    color: #1a202c;
    margin-bottom: 16px;
    padding-left: 12px;
    border-left: 4px solid #667eea;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.skill-item {
    background: linear-gradient(135deg, #f5f7fa 0%, #e8eef5 100%);
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    transition: transform 0.3s;
}

.skill-item:hover {
    transform: translateY(-3px);
}

.skill-icon {
    font-size: 32px;
    margin-bottom: 10px;
}

.skill-name {
    font-size: 14px;
    color: #4a5568;
    font-weight: 500;
}

/* ========== 页脚 ========== */
.footer {
    background: #1a202c;
    color: #a0aec0;
    padding: 40px 20px 20px;
    margin-top: 50px;
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-text {
    font-size: 14px;
    margin-bottom: 8px;
}

.footer-text a {
    color: #a0aec0;
}

.footer-text a:hover {
    color: #fff;
}

/* ========== 响应式设计 ========== */
@media (max-width: 900px) {
    .main-container {
        grid-template-columns: 1fr;
    }

    .sidebar {
        order: -1;
    }

    .nav-menu {
        gap: 20px;
    }

    .post-card,
    .post-detail,
    .about-page {
        padding: 20px;
    }

    .post-detail .post-title {
        font-size: 24px;
    }

    .page-title {
        font-size: 28px;
    }
}

@media (max-width: 600px) {
    .nav-container {
        padding: 0 15px;
    }

    .nav-logo {
        font-size: 18px;
    }

    .nav-menu {
        gap: 15px;
    }

    .nav-menu a {
        font-size: 13px;
    }

    .post-card {
        padding: 18px;
    }

    .post-title {
        font-size: 18px;
    }

    .post-meta {
        flex-direction: column;
        gap: 8px;
    }

    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ========== 动画效果 ========== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.post-card,
.sidebar-widget {
    animation: fadeIn 0.5s ease;
}

/* 代码高亮关键字颜色 */
.post-content pre code .keyword { color: #569cd6; }
.post-content pre code .string { color: #ce9178; }
.post-content pre code .comment { color: #6a9955; }
.post-content pre code .number { color: #b5cea8; }
.post-content pre code .function { color: #dcdcaa; }

/* ============ 服务器离线提示页 ============ */
.server-offline {
    max-width: 720px;
    margin: 60px auto;
    padding: 48px 40px;
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    text-align: center;
}
.offline-icon {
    font-size: 56px;
    margin-bottom: 20px;
    line-height: 1;
}
.server-offline h2 {
    color: #374151;
    margin: 0 0 12px 0;
    font-size: 26px;
    font-weight: 600;
}
.offline-desc {
    color: #6b7280;
    font-size: 15px;
    margin: 0 0 32px 0;
}
.offline-steps {
    text-align: left;
    background: #f9fafb;
    padding: 28px 32px;
    border-radius: 12px;
    border-left: 4px solid #3b82f6;
}
.step-item {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
    align-items: flex-start;
}
.step-item:last-child { margin-bottom: 0; }
.step-num {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    background: #3b82f6;
    color: #fff;
    border-radius: 50%;
    text-align: center;
    line-height: 28px;
    font-weight: 700;
    font-size: 14px;
}
.step-title {
    font-size: 15px;
    color: #374151;
    font-weight: 600;
    margin-bottom: 6px;
}
.step-item code {
    display: block;
    background: #1e293b;
    color: #e2e8f0;
    padding: 10px 14px;
    border-radius: 6px;
    margin-top: 6px;
    font-family: 'Courier New', monospace;
    font-size: 13px;
    word-break: break-all;
}
.step-item button {
    margin-top: 8px;
}

/* ========== 导航下拉菜单 ========== */
.nav-dropdown {
    position: relative;
}

.nav-dropdown .nav-menu-btn {
    position: relative;
}

.dropdown-panel {
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 8px;
    width: 300px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
    z-index: 200;
    overflow: hidden;
}

.nav-dropdown:hover .dropdown-panel {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-panel-title {
    padding: 16px 18px 10px;
    font-size: 14px;
    color: #666;
    font-weight: 600;
    border-bottom: 1px solid #f0f0f0;
}

.dropdown-section {
    padding: 12px 14px 8px;
    border-bottom: 1px solid #f5f5f5;
}

.dropdown-section:last-child {
    border-bottom: none;
    padding-bottom: 14px;
}

.dropdown-section-title {
    font-size: 12px;
    color: #999;
    font-weight: 500;
    margin-bottom: 8px;
    padding-left: 4px;
}

.dropdown-section-items {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-radius: 8px;
    color: #333;
    text-decoration: none;
    transition: background 0.2s;
    font-size: 14px;
}

.dropdown-item:hover {
    background: #f5f7fa;
    color: #333;
}

.dropdown-item-icon {
    font-size: 18px;
    width: 22px;
    text-align: center;
}

/* 响应式 */
@media (max-width: 768px) {
    .nav-center {
        display: none;
    }
    .nav-container {
        grid-template-columns: auto auto;
    }
    .nav-right {
        gap: 6px;
    }
    .dropdown-panel {
        width: 260px;
    }
    .dropdown-section-items {
        grid-template-columns: 1fr;
    }
}