/*
Theme Name: XNews
Theme URI: https://example.com/xnews
Author: Your Name
Author URI: https://example.com
Description: XNews是一个现代化的WordPress新闻/资讯主题，专注于提供最佳的阅读体验和内容展示效果。
Version: 1.0.0
Requires at least: 5.9
Tested up to: 6.4
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: xnews
Tags: blog, news, custom-background, custom-logo, custom-menu, featured-images, threaded-comments, translation-ready
*/

/* Reset CSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 清爽配色方案 */
    --primary-color: #3b82f6;
    --secondary-color: #8b5cf6;
    --text-color: #374151;
    --text-light: #9ca3af;
    --text-lighter: #d1d5db;
    --bg-color: #ffffff;
    --bg-light: #fafbfc;
    --bg-lighter: #f9fafb;
    --border-color: #f3f4f6;
    --border-light: #f9fafb;
    --accent-color: #10b981;
    
    /* 极简阴影 */
    --shadow-minimal: 0 1px 3px 0 rgb(0 0 0 / 0.02);
    --shadow-soft: 0 2px 8px 0 rgb(0 0 0 / 0.04);
    --shadow-hover: 0 4px 12px 0 rgb(0 0 0 / 0.06);
    
    /* 更大的圆角和间距 */
    --radius: 12px;
    --radius-sm: 6px;
    --radius-lg: 16px;
    --spacing-xs: 0.75rem;
    --spacing-sm: 1.25rem;
    --spacing-md: 2rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 5rem;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-color);
    background-color: var(--bg-lighter);
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    letter-spacing: 0.01em;
}

/* Container */
.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* 页面整体布局优化 */
.site {
    background: var(--bg-lighter);
    min-height: 100vh;
}

/* Header Styles - 清爽头部设计 */
.site-header {
    background-color: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--border-light);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) 0;
    min-height: 80px;
}

.site-branding {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.site-title {
    font-size: 1.875rem;
    font-weight: 600;
    margin: 0;
    letter-spacing: -0.02em;
    color: var(--text-color);
}

.site-title a {
    color: inherit;
    text-decoration: none;
    transition: all 0.3s ease;
}

.site-title a:hover {
    color: var(--primary-color);
    transform: translateY(-1px);
}

.site-description {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-top: 0.25rem;
    font-weight: 400;
}

/* Navigation - 清爽导航设计 */
.main-navigation {
    background: transparent;
}

.main-navigation ul {
    list-style: none;
    display: flex;
    gap: var(--spacing-xl);
    margin: 0;
    padding: 0;
    align-items: center;
}

.main-navigation a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    position: relative;
    transition: all 0.3s ease;
    letter-spacing: 0.01em;
}

.main-navigation a:hover {
    color: var(--primary-color);
    background-color: var(--bg-light);
    transform: translateY(-1px);
}

.main-navigation a::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 1px;
    transition: width 0.3s ease;
}

.main-navigation a:hover::after {
    width: 80%;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
}

/* Content Area - 清爽内容布局 */
.site-content {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-lighter);
}

.content-wrapper {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--spacing-xxl);
    align-items: start;
}

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

/* Posts - 清爽文章卡片 */
.post {
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xxl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-minimal);
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.post::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.post:hover::before {
    opacity: 1;
}

.post-header {
    margin-bottom: var(--spacing-lg);
}

.post-title {
    font-size: 1.75rem;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
    color: var(--text-color);
}

.post-title a {
    color: inherit;
    text-decoration: none;
    transition: all 0.3s ease;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    background-size: 0% 2px;
    background-repeat: no-repeat;
    background-position: 0% 100%;
}

.post-title a:hover {
    color: var(--primary-color);
    background-size: 100% 2px;
}

.post-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-light);
}

.post-meta span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.post-thumbnail {
    margin-bottom: var(--spacing-lg);
    border-radius: var(--radius);
    overflow: hidden;
    position: relative;
    background: var(--bg-light);
}

.post-thumbnail img {
    width: 100%;
    height: auto;
    display: block;
    transition: all 0.4s ease;
    filter: brightness(1.02) contrast(1.05);
}

.post-thumbnail:hover img {
    transform: scale(1.05);
    filter: brightness(1.1) contrast(1.1);
}

.post-content {
    color: var(--text-color);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    font-size: 1.05rem;
}

.post-content p {
    margin-bottom: var(--spacing-md);
}

.post-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-light);
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    background-size: 0% 100%;
    background-repeat: no-repeat;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.read-more:hover {
    gap: 0.75rem;
    color: white;
    background-size: 100% 100%;
    transform: translateY(-1px);
    box-shadow: var(--shadow-soft);
}

/* Sidebar - 清爽侧边栏 */
.sidebar {
    position: sticky;
    top: calc(100px + var(--spacing-lg));
    height: fit-content;
}

.widget {
    background: var(--bg-color);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-minimal);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.widget::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.widget:hover::before {
    opacity: 1;
}

.widget-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--text-color);
    position: relative;
    padding-bottom: var(--spacing-sm);
    letter-spacing: -0.01em;
}

.widget-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background-color: var(--primary-color);
}

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

.widget li {
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--border-color);
}

.widget li:last-child {
    border-bottom: none;
}

.widget a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

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

/* Buttons - 清爽按钮设计 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    background: var(--bg-color);
    color: var(--text-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.01em;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: left 0.3s ease;
    z-index: -1;
}

.btn:hover {
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-soft);
}

.btn:hover::before {
    left: 0;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-minimal);
}

.btn-primary:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-hover);
    color: white;
}

/* Forms - 清爽表单设计 */
input[type="text"],
input[type="email"],
input[type="url"],
input[type="password"],
input[type="search"],
textarea,
select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s ease;
    letter-spacing: 0.01em;
    line-height: 1.5;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.08);
    background: var(--bg-light);
    transform: translateY(-1px);
}

input::placeholder,
textarea::placeholder {
    color: var(--text-lighter);
    font-weight: 400;
}

/* 搜索框特殊样式 */
input[type="search"] {
    background: var(--bg-light);
    border: 2px solid var(--border-light);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-lg);
}

input[type="search"]:focus {
    background: var(--bg-color);
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.1);
}

/* Pagination - 清爽分页导航 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin: var(--spacing-xxl) 0;
    padding: var(--spacing-lg);
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-minimal);
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 48px;
    height: 48px;
    padding: 0 var(--spacing-sm);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    background: var(--bg-color);
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.pagination a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: left 0.3s ease;
    z-index: -1;
}

.pagination a:hover {
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-soft);
}

.pagination a:hover::before {
    left: 0;
}

.pagination .current {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-soft);
    transform: translateY(-1px);
}

.pagination .dots {
    background: transparent;
    border: none;
    color: var(--text-light);
    cursor: default;
}

.pagination .dots:hover {
    background: transparent;
    transform: none;
    box-shadow: none;
}

/* 上一页/下一页按钮特殊样式 */
.pagination .prev,
.pagination .next {
    padding: 0 var(--spacing-md);
    font-weight: 600;
}

.pagination .prev svg,
.pagination .next svg {
    width: 16px;
    height: 16px;
    transition: transform 0.2s ease;
}

.pagination .prev:hover svg {
    transform: translateX(-2px);
}

.pagination .next:hover svg {
    transform: translateX(2px);
}

/* 响应式分页 */
@media (max-width: 768px) {
    .pagination {
        gap: 4px;
        padding: var(--spacing-sm);
    }
    
    .pagination a,
    .pagination span {
        min-width: 36px;
        height: 36px;
        font-size: 0.8rem;
    }
    
    .pagination .prev,
    .pagination .next {
        padding: 0 var(--spacing-sm);
    }
    
    /* 在小屏幕上隐藏部分页码 */
    .pagination .page-numbers:not(.current):not(.prev):not(.next):not(.dots) {
        display: none;
    }
    
    .pagination .page-numbers:not(.current):not(.prev):not(.next):not(.dots):nth-child(-n+3),
    .pagination .page-numbers:not(.current):not(.prev):not(.next):not(.dots):nth-last-child(-n+3) {
        display: inline-flex;
    }
}

/* Footer - 清爽页脚设计 */
.site-footer {
    background: var(--bg-color);
    border-top: 1px solid var(--border-light);
    padding: var(--spacing-xxl) 0 var(--spacing-xl);
    margin-top: var(--spacing-xxl);
    position: relative;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-light);
    color: var(--text-light);
    font-size: 0.9rem;
    font-weight: 500;
}

/* Social Links - 清爽社交链接 */
.social-links {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-top: var(--spacing-md);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    background: var(--bg-light);
    border: 1px solid var(--border-light);
    color: var(--text-light);
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.social-links a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    transition: left 0.3s ease;
    z-index: -1;
}

.social-links a:hover {
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--shadow-soft);
}

.social-links a:hover::before {
    left: 0;
}

/* Responsive Design - 清爽响应式设计 */
@media (max-width: 1024px) {
    .content-wrapper {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .sidebar {
        position: static;
        order: -1;
    }
    
    .site-content {
        padding: var(--spacing-xl) 0;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-xs: 0.5rem;
        --spacing-sm: 1rem;
        --spacing-md: 1.5rem;
        --spacing-lg: 2rem;
        --spacing-xl: 2.5rem;
        --spacing-xxl: 3rem;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .header-inner {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
        padding: var(--spacing-md) 0;
    }
    
    .site-title {
        font-size: 1.5rem;
    }
    
    .main-navigation {
        width: 100%;
    }
    
    .main-navigation ul {
        flex-direction: column;
        gap: var(--spacing-md);
        background: var(--bg-color);
        padding: var(--spacing-md);
        border-radius: var(--radius);
        box-shadow: var(--shadow-soft);
    }
    
    .menu-toggle {
        display: block;
    }
    
    .main-navigation.toggled ul {
        display: flex;
    }
    
    .main-navigation ul {
        display: none;
    }
    
    .post {
        padding: var(--spacing-xl);
        margin-bottom: var(--spacing-lg);
    }
    
    .post-title {
        font-size: 1.5rem;
    }
    
    .post-meta {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: flex-start;
    }
    
    .social-links {
        gap: var(--spacing-xs);
    }
    
    .social-links a {
        width: 44px;
        height: 44px;
    }
}

@media (max-width: 480px) {
    .site-content {
        padding: var(--spacing-lg) 0;
    }
    
    .post {
        padding: var(--spacing-md);
        margin-bottom: var(--spacing-lg);
    }
    
    .widget {
        padding: var(--spacing-md);
    }
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    :root {
        --text-color: #f1f5f9;
        --text-light: #94a3b8;
        --bg-color: #0f172a;
        --bg-light: #1e293b;
        --border-color: #334155;
        --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.2);
        --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    }
    
    .site-header {
        background-color: rgba(15, 23, 42, 0.95);
    }
    
    .btn {
        background: var(--bg-light);
    }
    
    .btn:hover {
        background: var(--bg-color);
    }
}