/* ===== 主样式文件 - 导入所有组件 ===== */

/* 基础样式和变量 */
@import url('./base/variables.css');
@import url('./base/reset.css');

/* 组件样式 */
@import url('./components/header.css');
@import url('./components/footer.css');
@import url('./components/buttons.css');
@import url('./components/cards.css');

/* 页面样式 */
@import url('./pages/home.css');
@import url('./pages/post.css');
@import url('./pages/archive.css');
@import url('./pages/about.css');  /* 新增 about 页面样式 */

/* 工具样式 */
@import url('./utils/utilities.css');

/* ===== CSS 重置和基础样式 ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 色彩系统 - 明色主题 */
    --color-primary-50: #f0f9ff;
    --color-primary-100: #e0f2fe;
    --color-primary-500: #0ea5e9;
    --color-primary-600: #0284c7;
    --color-primary-700: #0369a1;
    
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;
    
    --color-white: #ffffff;
    --color-black: #000000;
    
    /* 语义化颜色 */
    --color-bg: var(--color-white);
    --color-bg-secondary: var(--color-gray-50);
    --color-text: var(--color-gray-800);
    --color-text-secondary: var(--color-gray-600);
    --color-border: var(--color-gray-200);
    
    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-700));
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* 间距 */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    
    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* 字体 */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    
    /* 过渡 */
    --transition-base: all 0.3s ease;
    --transition-smooth: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 深色主题变量 */
[data-theme="dark"] {
    --color-bg: var(--color-gray-900);
    --color-bg-secondary: var(--color-gray-800);
    --color-text: var(--color-gray-100);
    --color-text-secondary: var(--color-gray-300);
    --color-border: var(--color-gray-700);
}

/* 基础样式 */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    transition: var(--transition-base);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* 隐藏元素（辅助功能） */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ===== 页面加载器 ===== */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.page-loader.fade-out {
    opacity: 0;
    pointer-events: none;
}

.loader-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--color-gray-200);
    border-top: 4px solid var(--color-primary-500);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ===== 头部样式 ===== */
.site-header {
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.8);
}

[data-theme="dark"] .site-header {
    background: rgba(15, 23, 42, 0.8);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) 0;
}

/* Logo */
.logo-link {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-text);
}

.logo-icon {
    font-size: 1.5rem;
}

/* 主导航 */
.main-nav {
    display: flex;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--space-md);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    text-decoration: none;
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary-600);
    background: var(--color-primary-50);
}

[data-theme="dark"] .nav-link:hover,
[data-theme="dark"] .nav-link.active {
    background: var(--color-gray-800);
}

.nav-icon {
    font-size: 1.125rem;
}

/* 工具区域 */
.header-tools {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.theme-toggle {
    background: none;
    border: none;
    padding: var(--space-xs);
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--color-text-secondary);
    transition: var(--transition-base);
    position: relative;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background: var(--color-gray-100);
    color: var(--color-text);
}

[data-theme="dark"] .theme-toggle:hover {
    background: var(--color-gray-800);
}

.theme-icon {
    position: absolute;
    transition: var(--transition-base);
}

.theme-icon.moon {
    opacity: 0;
    transform: rotate(90deg);
}

[data-theme="dark"] .theme-icon.sun {
    opacity: 0;
    transform: rotate(90deg);
}

[data-theme="dark"] .theme-icon.moon {
    opacity: 1;
    transform: rotate(0);
}

/* 移动端菜单 */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    padding: var(--space-xs);
    cursor: pointer;
    gap: 4px;
}

.menu-bar {
    width: 20px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition-base);
}

.mobile-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
}

.mobile-nav-list {
    list-style: none;
    padding: var(--space-md);
}

.mobile-nav-link {
    display: block;
    padding: var(--space-sm) 0;
    text-decoration: none;
    color: var(--color-text);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition-base);
}

.mobile-nav-link:hover {
    color: var(--color-primary-600);
}

/* ===== 英雄区域样式 ===== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: var(--gradient-hero);
    color: var(--color-white);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

.floating-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
}

.shape {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    animation: float 6s ease-in-out infinite;
}

.shape-1 {
    width: 200px;
    height: 200px;
    top: 10%;
    left: 5%;
    animation-delay: 0s;
}

.shape-2 {
    width: 150px;
    height: 150px;
    top: 60%;
    right: 10%;
    animation-delay: 2s;
}

.shape-3 {
    width: 100px;
    height: 100px;
    bottom: 20%;
    left: 15%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
    position: relative;
    z-index: 2;
    width: 100%;
}

.hero-badge {
    margin-bottom: var(--space-md);
}

.hero-badge span {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 500;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-md);
}

.gradient-text {
    background: linear-gradient(135deg, #fbbf24, #f472b6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: var(--space-xl);
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-lg);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-base);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--color-white);
    color: var(--color-gray-900);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

.btn-secondary:hover {
    background: var(--color-white);
    color: var(--color-gray-900);
}

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-outline:hover {
    border-color: var(--color-primary-500);
    color: var(--color-primary-500);
}

.btn-large {
    padding: var(--space-md) var(--space-xl);
    font-size: 1.125rem;
}

.btn-icon {
    width: 20px;
    height: 20px;
}

.hero-stats {
    display: flex;
    gap: var(--space-xl);
}

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

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* 代码窗口 */
.hero-visual {
    display: flex;
    justify-content: center;
}

.code-window {
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    overflow: hidden;
    max-width: 420px;
    width: 100%;
}

.window-header {
    background: rgba(30, 41, 59, 0.8);
    padding: var(--space-sm);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.window-controls {
    display: flex;
    gap: var(--space-xs);
}

.control {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.control-close { background: #ef4444; }
.control-minimize { background: #f59e0b; }
.control-maximize { background: #10b981; }

.window-title {
    color: var(--color-gray-300);
    font-size: 0.875rem;
    font-family: var(--font-mono);
}

.window-content {
    padding: var(--space-lg);
}

.window-content pre {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--color-gray-300);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-arrow {
    width: 30px;
    height: 30px;
    border-right: 2px solid var(--color-white);
    border-bottom: 2px solid var(--color-white);
    transform: rotate(45deg);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: rotate(45deg) translateY(0); }
    40% { transform: rotate(45deg) translateY(-10px); }
    60% { transform: rotate(45deg) translateY(-5px); }
}

/* ===== 分类区域样式 ===== */
.categories-section {
    padding: var(--space-2xl) 0;
    background: var(--color-bg);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.section-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.category-card {
    background: var(--color-bg);
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary-500);
}

.category-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
    color: var(--color-white);
}

.category-icon svg {
    width: 24px;
    height: 24px;
}

.category-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

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

/* ===== 文章区域样式 ===== */
.posts-section {
    padding: var(--space-2xl) 0;
    background: var(--color-bg-secondary);
}

.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

/* 文章卡片组件 */
.post-card {
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.post-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary-500);
}

.post-card-header {
    margin-bottom: var(--space-lg);
    flex: 1;
}

.post-meta {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
}

.post-date {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    background: var(--color-bg-secondary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-md);
}

.post-tags {
    display: flex;
    gap: var(--space-xs);
}

.post-tag {
    font-size: 0.75rem;
    color: var(--color-primary-600);
    background: rgba(14, 165, 233, 0.1);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
}

.post-excerpt {
    color: var(--color-text-secondary);
    line-height: 1.6;
    font-size: 0.875rem;
}

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

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

.read-more-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--color-primary-600);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    transition: gap 0.3s ease;
}

.read-more-link:hover {
    gap: var(--space-sm);
}

.read-more-link svg {
    width: 16px;
    height: 16px;
}

.section-footer {
    text-align: center;
}

/* 动画箭头 */
.arrow-animated {
    position: relative;
    width: 40px;
    height: 2px;
    background: #f39c12;
    transition: all 0.3s ease;
}

.arrow-animated::before,
.arrow-animated::after {
    content: '';
    position: absolute;
    width: 15px;
    height: 2px;
    background: #f39c12;
    right: -2px;
    transition: all 0.3s ease;
}

.arrow-animated::before {
    top: -5px;
    transform: rotate(45deg);
}

.arrow-animated::after {
    top: 5px;
    transform: rotate(-45deg);
}

.arrow-animated:hover {
    width: 60px;
}

.arrow-animated:hover::before,
.arrow-animated:hover::after {
    right: -10px;
}

/* ===== 数据统计区域样式 ===== */
.stats-section {
    padding: var(--space-2xl) 0;
    background: var(--color-bg);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
}

.stat-card {
    background: var(--color-bg);
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
    text-align: center;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-500);
}

.stat-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
    color: var(--color-white);
}

.stat-icon svg {
    width: 32px;
    height: 32px;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

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

/* ===== 行动召唤区域样式 ===== */
.cta-section {
    padding: var(--space-2xl) 0;
    background: var(--gradient-primary);
    color: var(--color-white);
    text-align: center;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.cta-description {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: var(--space-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== 页脚样式 ===== */
.site-footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-text);
}

.footer-description {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.social-links {
    display: flex;
    gap: var(--space-sm);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    text-decoration: none;
    transition: var(--transition-base);
}

.social-link:hover {
    background: var(--color-primary-500);
    color: var(--color-white);
    border-color: var(--color-primary-500);
}

.footer-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.footer-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.footer-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: var(--transition-base);
}

.footer-link:hover {
    color: var(--color-primary-600);
}

.footer-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.footer-tag {
    display: inline-block;
    background: var(--color-bg);
    color: var(--color-text-secondary);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    text-decoration: none;
    transition: var(--transition-base);
    border: 1px solid var(--color-border);
}

.footer-tag:hover {
    background: var(--color-primary-500);
    color: var(--color-white);
    border-color: var(--color-primary-500);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

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

.footer-stats {
    display: flex;
    gap: var(--space-lg);
}

.footer-stats .stat {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

/* ===== 返回顶部按钮 ===== */
.back-to-top {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    width: 48px;
    height: 48px;
    background: var(--color-primary-500);
    color: var(--color-white);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    z-index: 90;
}

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

.back-to-top:hover {
    background: var(--color-primary-600);
    transform: translateY(-2px);
}

.back-to-top svg {
    width: 20px;
    height: 20px;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-xl);
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-xl);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-sm);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-actions {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .categories-grid,
    .posts-grid,
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-large {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    /* 移动端导航 */
    .main-nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-menu.active {
        display: block;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }
    
    .footer-stats {
        flex-direction: column;
        gap: var(--space-xs);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .cta-title {
        font-size: 2rem;
    }
    
    .back-to-top {
        bottom: var(--space-sm);
        right: var(--space-sm);
    }
}

/* ===== 打印样式 ===== */
@media print {
    .site-header,
    .site-footer,
    .back-to-top,
    .hero-section,
    .categories-section,
    .stats-section,
    .cta-section {
        display: none;
    }
    
    .posts-section {
        padding: 0;
        background: transparent;
    }
    
    .post-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
        color: #000;
        background: #fff;
    }
}

/* ===== 减少动画（辅助功能） ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}