/*
Theme Name: CC-Blog
Theme URI: https://wuxuanchen.top/
Author: wuxuanchen
Author URI: https://wuxuanchen.top/
Description: 基于原生HTML/CSS开发的极简响应式博客主题，适配WordPress全功能，后台可视化配置
Version: 1.0.0
Text Domain: cc-blog
Tags: 博客, 响应式, 极简, 两栏, 自定义主题色, 小工具支持
*/

/* 1. 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 2. 全局CSS变量（主题色可在后台自定义） */
:root {
    --primary: #165DFF;
    --secondary: #6B7280;
    --light-bg: #F3F4F6;
    --dark-text: #1F2937;
    --white: #FFFFFF;
    --border-color: #E5E7EB;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius-lg: 0.75rem;
    --radius-full: 9999px;
    --transition: all 0.3s ease;
}

/* 3. 基础通用样式 */
body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #F9FAFB;
    color: var(--dark-text);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
}

ul, ol {
    padding-left: 1.5rem;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 0.5rem;
}

/* 容器：控制内容宽度，居中对齐 */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding-left: 1rem;
    padding-right: 1rem;
}

/* 4. 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 999;
    background-color: var(--white);
    transition: var(--transition);
}

.navbar-scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(4px);
    box-shadow: var(--shadow-sm);
}

.navbar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 4rem;
}

/* Logo样式 */
.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--dark-text);
}

.logo i {
    color: var(--primary);
    font-size: 1.5rem;
}

/* 桌面端导航菜单 */
.desktop-nav {
    display: none;
    align-items: center;
    gap: 2rem;
    margin-left: auto;
}

.desktop-nav li, li {
    list-style-type: none;
}

.desktop-nav a {
    font-weight: 500;
    color: var(--secondary);
    transition: var(--transition);
    padding-bottom: 0.125rem;
    border-bottom: 2px solid transparent;
}

.desktop-nav a:hover,
.desktop-nav a.current-menu-item {
    color: var(--primary);
    border-color: var(--primary);
}

/* 导航右侧按钮组 */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.icon-btn {
    background: none;
    border: none;
    font-size: 1.125rem;
    color: var(--secondary);
    cursor: pointer;
    transition: var(--transition);
}

.icon-btn:hover {
    color: var(--primary);
}

/* 移动端菜单按钮 */
.menu-btn {
    display: block;
}

/* 移动端导航菜单 */
.mobile-menu {
    display: none;
    background-color: var(--white);
    border-top: 1px solid var(--border-color);
    padding: 0.75rem 0;
}

.mobile-menu.active {
    display: block;
}

.mobile-menu a {
    display: block;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    color: var(--secondary);
    font-weight: 500;
    transition: var(--transition);
}

.mobile-menu a:hover,
.mobile-menu a.current-menu-item {
    background-color: rgba(22, 93, 255, 0.05);
    color: var(--primary);
}

/* 5. 主内容区基础样式 */
main {
    margin-top: 6rem;
    padding-bottom: 4rem;
}

/* 面包屑导航 */
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    color: var(--secondary);
}

.breadcrumb a {
    transition: var(--transition);
}

.breadcrumb a:hover {
    color: var(--primary);
}

.breadcrumb .separator {
    color: var(--border-color);
}

.breadcrumb .current {
    color: var(--primary);
    font-weight: 500;
}

/* 内容布局容器 */
.content-wrapper {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* 6. 首页英雄区 */
.hero {
    text-align: center;
    margin-bottom: 3rem;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: 1rem;
    text-wrap: balance;
}

.hero p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--secondary);
    max-width: 32rem;
    margin: 0 auto 2rem;
    text-wrap: balance;
}

/* 搜索框样式 */
.search-box {
    position: relative;
    max-width: 32rem;
    margin: 0 auto;
}

.search-input {
    width: 100%;
    padding: 0.75rem 3rem 0.75rem 1.25rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: 1rem;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(22, 93, 255, 0.1);
}

.search-btn {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    font-size: 1.125rem;
    color: var(--secondary);
    cursor: pointer;
    transition: var(--transition);
}

.search-btn:hover {
    color: var(--primary);
}

/* 分类页头部信息 */
.category-header {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 2rem;
    margin-bottom: 2rem;
    text-align: center;
}

.category-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--dark-text);
}

.category-desc {
    color: var(--secondary);
    max-width: 36rem;
    margin: 0 auto;
}

/* 7. 文章列表与卡片 */
.post-list {
    width: 100%;
}

.section-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-title i {
    color: var(--primary);
}

.post-cards {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.post-card {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.post-card-image {
    width: 100%;
    height: 12rem;
    overflow: hidden;
}

.post-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 0;
}

.post-card-content {
    padding: 1.5rem;
}

/* 文章元信息 */
.post-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.post-category {
    padding: 0.25rem 0.75rem;
    background-color: rgba(22, 93, 255, 0.1);
    color: var(--primary);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
}

.post-meta-text {
    font-size: 0.875rem;
    color: var(--secondary);
}

.post-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    transition: var(--transition);
}

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

.post-excerpt {
    color: var(--secondary);
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    color: var(--primary);
    font-weight: 500;
    transition: var(--transition);
}

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

/* 8. 分页样式 */
.pagination {
    margin-top: 2.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.page-item {
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.375rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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

.page-item.current {
    background-color: var(--primary);
    border-color: var(--primary);
    color: var(--white);
    font-weight: 500;
}

.page-dots {
    color: var(--secondary);
    padding: 0 0.25rem;
}

/* 9. 文章详情页样式 */
.article-main {
    width: 100%;
}

.article-card {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 2rem;
    margin-bottom: 2rem;
}

.article-header {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.article-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
    text-wrap: balance;
}

.article-cover {
    width: 100%;
    height: clamp(12rem, 25vw, 20rem);
    margin-bottom: 2rem;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.article-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 0;
}

/* 文章内容排版 */
.article-content {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--dark-text);
}

.article-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 2rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--light-bg);
}

.article-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 1.5rem 0 0.75rem;
}

.article-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin: 1rem 0 0.5rem;
}

.article-content p {
    margin-bottom: 1rem;
}

.article-content blockquote {
    margin: 1.5rem 0;
    padding: 1rem 1.5rem;
    border-left: 4px solid var(--primary);
    background-color: var(--light-bg);
    border-radius: 0 0.5rem 0.5rem 0;
    color: var(--secondary);
}

.article-content pre {
    margin: 1.5rem 0;
    padding: 1.25rem;
    background-color: #1E293B;
    border-radius: 0.5rem;
    overflow-x: auto;
}

.article-content code {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.875rem;
}

.article-content pre code {
    color: #E2E8F0;
}

.article-content p code {
    padding: 0.125rem 0.375rem;
    background-color: rgba(22, 93, 255, 0.1);
    color: var(--primary);
    border-radius: 0.25rem;
}

.article-content ul,
.article-content ol {
    margin-bottom: 1rem;
}

.article-content li {
    margin-bottom: 0.5rem;
}

.article-content ul li {
    list-style-type: disc;
}

.article-content ol li {
    list-style-type: decimal;
}

.article-content img {
    margin: 1.5rem auto;
    box-shadow: var(--shadow-sm);
}

/* 文章底部标签 */
.article-footer {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.article-tags {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.article-tags .tag-item {
    padding: 0.375rem 0.875rem;
    background-color: var(--light-bg);
    color: var(--secondary);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    transition: var(--transition);
}

.article-tags .tag-item:hover {
    background-color: var(--primary);
    color: var(--white);
}

/* 上一篇/下一篇导航 */
.post-navigation {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
}

.post-nav-item {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem;
    transition: var(--transition);
}

.post-nav-item:hover {
    box-shadow: var(--shadow-lg);
}

.post-nav-label {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    color: var(--secondary);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.post-nav-title {
    font-weight: 500;
    transition: var(--transition);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-nav-item:hover .post-nav-title {
    color: var(--primary);
}

/* 相关文章推荐 */
.related-posts {
    margin-bottom: 2rem;
}

.related-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.related-title i {
    color: var(--primary);
}

.related-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.related-card {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.related-card-image {
    width: 100%;
    height: 10rem;
    overflow: hidden;
}

.related-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 0;
}

.related-card-content {
    padding: 1rem;
}

.related-card-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: var(--transition);
}

.related-card:hover .related-card-title {
    color: var(--primary);
}

.related-card-meta {
    color: var(--secondary);
    font-size: 0.75rem;
}

/* 10. 侧边栏样式 */
.sidebar {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.sidebar-widget {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem;
}

.widget-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.widget-title i {
    color: var(--primary);
}

/* 作者信息组件 */
.author-widget {
    text-align: center;
}

.author-avatar {
    width: 6rem;
    height: 6rem;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1rem;
    border: 4px solid var(--white);
    box-shadow: var(--shadow-sm);
}

.author-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.author-desc {
    color: var(--secondary);
    margin-bottom: 1rem;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
}

.social-link {
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    background-color: rgba(22, 93, 255, 0.1);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

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

/* 分类列表组件 */
.category-list,
.wp-block-archives-list,
.wp-block-latest-posts__list,
.wp-block-categories-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    list-style: none;
    padding-left: 0;
}

.category-item a,
.cat-item a,
.wp-block-archives-list > li a,
.wp-block-latest-posts__list > li a,
.wp-block-categories-list > li a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0.75rem;
    border-radius: 0.375rem;
    transition: var(--transition);
}

.category-item a:hover,
.category-item a.current-category,
.cat-item a:hover,
.wp-block-archives-list > li a:hover,
.wp-block-latest-posts__list > li a:hover,
.wp-block-categories-list > li a:hover {
    background-color: rgba(22, 93, 255, 0.05);
}

.category-name {
    transition: var(--transition);
}

.category-item a:hover .category-name,
.category-item a.current-category .category-name,
.cat-item a:hover,
.wp-block-archives-list > li a:hover,
.wp-block-latest-posts__list > li a:hover,
.wp-block-categories-list > li a:hover {
    color: var(--primary);
    font-weight: 500;
}

.category-count {
    font-size: 0.75rem;
    background-color: var(--light-bg);
    color: var(--secondary);
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-full);
}

/* 热门文章组件 */
.hot-post-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    list-style: none;
    padding-left: 0;
}

.hot-post-item {
    display: flex;
    gap: 0.75rem;
}

.hot-post-num {
    font-size: 1.5rem;
    font-weight: 700;
    color: rgba(22, 93, 255, 0.3);
    flex-shrink: 0;
}

.hot-post-title {
    font-weight: 500;
    margin-bottom: 0.25rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: var(--transition);
}

.hot-post-title a:hover {
    color: var(--primary);
}

.hot-post-views {
    font-size: 0.875rem;
    color: var(--secondary);
}

/* 标签云组件 */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag-item {
    padding: 0.25rem 0.75rem;
    background-color: var(--light-bg);
    color: var(--secondary);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    transition: var(--transition);
}

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

/* 11. 评论区样式 */
.comment-section {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 2rem;
}

.comment-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.comment-title i {
    color: var(--primary);
}

/* 评论表单 */
.comment-form {
    margin-bottom: 2rem;
}

.comment-form textarea {
    width: 100%;
    min-height: 8rem;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
    margin-bottom: 1rem;
    resize: vertical;
}

.comment-form textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(22, 93, 255, 0.1);
}

.comment-form .form-submit input {
    padding: 0.625rem 1.5rem;
    background-color: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 0.375rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.comment-form .form-submit input:hover {
    background-color: #0d47a1;
}

.comment-form .comment-notes,
.comment-form .logged-in-as {
    color: var(--secondary);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.comment-form .comment-form-author,
.comment-form .comment-form-email,
.comment-form .comment-form-url {
    margin-bottom: 1rem;
}

.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form input[type="url"] {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.comment-form input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(22, 93, 255, 0.1);
}

.comment-form label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.comment-form .comment-form-cookies-consent {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.comment-form .comment-form-cookies-consent input {
    width: auto;
}

.comment-form .comment-form-cookies-consent label {
    margin-bottom: 0;
    font-weight: normal;
    font-size: 0.875rem;
    color: var(--secondary);
}

/* 评论列表 */
.comment-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    list-style: none;
    padding-left: 0;
    margin-bottom: 2rem;
}

.comment-item {
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--light-bg);
}

.comment-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.comment-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.comment-avatar {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    object-fit: cover;
}

.comment-info {
    flex: 1;
}

.comment-author {
    font-weight: 600;
    margin-bottom: 0.125rem;
}

.comment-time {
    font-size: 0.75rem;
    color: var(--secondary);
}

.comment-content {
    color: var(--dark-text);
    line-height: 1.7;
    margin-bottom: 0.75rem;
}

.comment-reply-link {
    color: var(--primary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
}

.comment-reply-link:hover {
    text-decoration: underline;
}

.comment-awaiting-moderation {
    color: var(--primary);
    font-size: 0.875rem;
    font-style: italic;
    margin-top: 0.5rem;
}

/* 评论分页 */
.comment-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.comment-pagination .page-numbers {
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.375rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.comment-pagination .page-numbers:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.comment-pagination .page-numbers.current {
    background-color: var(--primary);
    border-color: var(--primary);
    color: var(--white);
    font-weight: 500;
}

/* 12. 页脚样式 */
footer {
    background-color: var(--white);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-logo i {
    color: var(--primary);
    font-size: 1.5rem;
}

.footer-desc {
    color: var(--secondary);
    margin-bottom: 1rem;
}

.footer-nav-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-nav-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
    list-style: none;
    padding-left: 0;
}

.footer-nav-list a {
    color: var(--secondary);
    transition: var(--transition);
}

.footer-nav-list a:hover {
    color: var(--primary);
}

.subscribe-form {
    display: flex;
    margin-top: 1rem;
}

.subscribe-input {
    flex: 1;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem 0 0 0.375rem;
    font-size: 0.875rem;
    transition: var(--transition);
}

.subscribe-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(22, 93, 255, 0.1);
}

.subscribe-btn {
    padding: 0 1rem;
    background-color: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 0 0.375rem 0.375rem 0;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.subscribe-btn:hover {
    background-color: #0d47a1;
}

.footer-copyright {
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
    text-align: center;
    color: var(--secondary);
    font-size: 0.875rem;
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    background-color: var(--primary);
    color: var(--white);
    border: none;
    font-size: 1.125rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 998;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: #0d47a1;
}

/* 13. 响应式媒体查询 */
/* 平板端：≥768px */
@media (min-width: 768px) {
    .desktop-nav {
        display: flex;
    }

    .menu-btn {
        display: none;
    }

    .post-card {
        display: flex;
    }

    .post-card-image {
        width: 33.333%;
        height: auto;
    }

    .post-card-content {
        width: 66.666%;
    }

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

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

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

/* 桌面端：≥1024px */
@media (min-width: 1024px) {
    .content-wrapper {
        flex-direction: row;
    }

    .post-list, .article-main {
        width: 66.666%;
    }

    .sidebar {
        width: 33.333%;
    }

    .related-cards {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer-content {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* WordPress默认样式兼容 */
.wp-caption {
    max-width: 100%;
    margin-bottom: 1rem;
}

.wp-caption-text {
    color: var(--secondary);
    font-size: 0.875rem;
    text-align: center;
    margin-top: 0.5rem;
}

.sticky {
    border-left: 4px solid var(--primary);
}

.gallery {
    margin-bottom: 1rem;
}

.aligncenter {
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.alignleft {
    float: left;
    margin-right: 1rem;
    margin-bottom: 1rem;
}

.alignright {
    float: right;
    margin-left: 1rem;
    margin-bottom: 1rem;
}

.screen-reader-text {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

.btn-container .btn {
    margin-right: 10px;
    margin-bottom: 10px;
    word-spacing: normal;
}

.btn {
    display: inline-block;
    vertical-align: middle;
    height: 44px;
    line-height: 44px;
    border: 1px solid transparent;
    padding: 0 18px;
    background-color: var(--primary);
    color: var(--white);
    white-space: nowrap;
    text-align: center;
    font-size: 14px;
    border-radius: 8px;
    cursor: pointer;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;

    outline: 0;
    -webkit-appearance: none;
    appearance: none;
    -webkit-transition: all .3s;
    transition: all .3s;
    box-sizing: border-box;
}

.btn:hover {
    background-color: #0d47a1;
}

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

.btn.btn-border:hover {
    background-color: #f0f5ff;
}