/* ============================================
   全局样式 - SEO 优化响应式网站
   设计理念：现代温暖风格（橙色主题）
   ============================================ */

:root {
  /* 温暖色彩系统 */
  --primary: #FF9500;           /* 主色 - 温暖橙色 */
  --primary-light: #FFB84D;     /* 浅橙色 */
  --primary-dark: #E67E00;      /* 深橙色 */
  --primary-foreground: #ffffff;
  
  --secondary: #FFF5E6;         /* 浅橙色背景 */
  --secondary-foreground: #333333;
  
  --muted: #F0F0F0;             /* 浅灰色 */
  --muted-foreground: #666666;
  
  --accent: #FF6B6B;            /* 红色强调 */
  --accent-foreground: #ffffff;
  
  --background: #ffffff;
  --foreground: #333333;
  
  --border: #E8E8E8;
  --card-bg: #ffffff;
  --card-border: #E8E8E8;
  
  /* 间距系统 */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 0.5rem;
  --spacing-lg: 1rem;
  --spacing-xl: 1rem;
  --spacing-2xl: 1rem;
  --spacing-3xl: 1rem;
  
  /* 圆角 */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  
  /* 阴影 */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  
  /* 过渡 */
  --transition: all 0.2s ease-in-out;
}

/* ============================================
   基础样式
   ============================================ */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--background);
  color: var(--foreground);
  line-height: 1.6;
  font-size: 16px;
}

/* ============================================
   排版系统
   ============================================ */

h1 {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: var(--spacing-md);
}

h4 {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: var(--spacing-md);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--foreground);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

/* ============================================
   容器和布局
   ============================================ */

.container {
  width: 100%;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

@media (min-width: 640px) {
  .container {
    padding: 0 var(--spacing-lg);
  }
}

@media (min-width: 1024px) {
  .container {
    max-width: 1280px;
    padding: 0 var(--spacing-2xl);
  }
}

/* 两栏布局 */
.layout-two-column {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
}

@media (min-width: 768px) {
  .layout-two-column {
    grid-template-columns: 1fr 320px;
  }
}

@media (min-width: 1024px) {
  .layout-two-column {
    grid-template-columns: 1fr 380px;
  }
}

/* ============================================
   头部导航
   ============================================ */

header {
  background-color: var(--primary);
  color: var(--primary-foreground);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-weight: 700;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--primary-foreground);
  transition: var(--transition);
}

.logo:hover {
  opacity: 0.8;
}

.logo-icon {
  /* width: 32px; */
  padding: 0 5px;
  height: 32px;
  background-color: var(--primary-foreground);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--primary);
}

/* 导航菜单 */
.nav-menu {
  display: none;
  gap: var(--spacing-2xl);
  align-items: center;
}

@media (min-width: 768px) {
  .nav-menu {
    display: flex;
  }
}

.nav-menu a {
  color: var(--primary-foreground);
  transition: var(--transition);
}

.nav-menu a:hover {
  opacity: 0.8;
  text-decoration: none;
}

/* 搜索框 */
.search-box {
  display: none;
  align-items: center;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-md);
  gap: var(--spacing-sm);
}

@media (min-width: 640px) {
  .search-box {
    display: flex;
  }
}

.search-box input {
  background: transparent;
  border: none;
  color: var(--primary-foreground);
  outline: none;
  width: 150px;
}

.search-box input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

/* 移动菜单按钮 */
.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--primary-foreground);
  cursor: pointer;
  font-size: 1.5rem;
  transition: var(--transition);
}

@media (min-width: 768px) {
  .menu-toggle {
    display: none;
  }
}

.menu-toggle:hover {
  opacity: 0.8;
}

/* ============================================
   文章卡片 - 左图右文
   ============================================ */

.article-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  margin-bottom: var(--spacing-xl);
}

@media (min-width: 768px) {
  .article-card {
    flex-direction: row;
    min-height: 200px;
  }
}

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

.article-card-cover{
  padding: var(--spacing-lg);
}

.article-card-image {
  width: 100%;
  /* height: 200px; */
  object-fit: cover;
  background-color: var(--secondary);
}

@media (min-width: 768px) {
  .article-card-image {
    width: 100%;
    height: auto;
    /* min-height: 200px; */
  }
}

.article-card-content {
  padding: var(--spacing-lg);
  flex: 1;
  /* display: flex; */
  flex-direction: column;
  justify-content: space-between;
}

.article-card-meta {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--muted-foreground);
  flex-wrap: wrap;
  align-items: center;
}

.article-card-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  line-height: 1.4;
  color: var(--foreground);
}

.article-card-title a {
  color: var(--foreground);
}

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

.article-card-excerpt {
  color: var(--muted-foreground);
  margin-bottom: var(--spacing-md);
  flex: 1;
  font-size: 0.84rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-footer {
  /* display: flex; */
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

.article-card-footer a{
  color:#939393;
  font-size:12px;
  margin-right:3px;
}

/* ============================================
   标签和分类
   ============================================ */

.tag {
  display: inline-block;
  background-color: var(--primary);
  color: var(--primary-foreground);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
  margin-right: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  transition: var(--transition);
  text-decoration: none;
}

.tag:hover {
  background-color: var(--primary-dark);
  text-decoration: none;
  transform: scale(1.05);
}

.category-badge {
  display: inline-block;
  background-color: var(--secondary);
  color: var(--primary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ============================================
   侧边栏
   ============================================ */

aside {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2xl);
}

.sidebar-section {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
}

.sidebar-section h3 {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 3px solid var(--primary);
}

.sidebar-list {
  list-style: none;
}

.sidebar-list li {
  margin-bottom: var(--spacing-md);
}

.sidebar-list a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--foreground);
  transition: var(--transition);
  padding: var(--spacing-sm) 0;
}

.sidebar-list a:hover {
  color: var(--primary);
  text-decoration: none;
  padding-left: var(--spacing-sm);
}

.sidebar-list-count {
  background-color: var(--secondary);
  color: var(--primary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 600;
}

/* ============================================
   底部
   ============================================ */

footer {
  background-color: #2C3E50;
  color: var(--primary-foreground);
  margin-top: var(--spacing-3xl);
  padding: var(--spacing-2xl) 0;
}

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

@media (min-width: 768px) {
  .footer-content {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.footer-section h4 {
  color: var(--primary-foreground);
  margin-bottom: var(--spacing-md);
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  display: block;
  margin-bottom: var(--spacing-sm);
  transition: var(--transition);
}

.footer-section a:hover {
  color: var(--primary-foreground);
  text-decoration: none;
}

.footer-divider {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-lg);
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
}

/* ============================================
   面包屑导航
   ============================================ */

.breadcrumb {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-2xl);
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

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

.breadcrumb a:hover {
  text-decoration: underline;
}

/* ============================================
   按钮
   ============================================ */

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  border: none;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--primary-foreground);
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  text-decoration: none;
  transform: translateY(-2px);
}

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

.btn-secondary:hover {
  background-color: var(--muted);
  text-decoration: none;
}

/* ============================================
   表单
   ============================================ */

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(255, 149, 0, 0.1);
}

/* ============================================
   网格布局
   ============================================ */

.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 {
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

.grid-3 {
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ============================================
   工具类
   ============================================ */

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

.text-muted {
  color: var(--muted-foreground);
}

.text-accent {
  color: var(--accent);
}

.mb-md {
  margin-bottom: var(--spacing-lg);
}

.mt-md {
  margin-top: var(--spacing-lg);
}

.py-xl {
  padding-top: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
}

.hidden {
  display: none;
}

@media (min-width: 768px) {
  .hidden-md {
    display: none;
  }
}

/* ============================================
   响应式媒体查询
   ============================================ */

@media (max-width: 767px) {
  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  h3 {
    font-size: 1.125rem;
  }

  .article-card-title {
    font-size: 1.125rem;
  }

  .layout-two-column {
    grid-template-columns: 1fr;
  }
}
/**
 * 手机端菜单 CSS
 * 将以下代码添加到 style.css 中
 */

/* 手机端菜单容器 */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 999;
  animation: fadeIn 0.3s ease-in-out;
}

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

/* 菜单内容 */
.mobile-menu-content {
  position: fixed;
  top: 0;
  left: 0;
  width: 75%;
  max-width: 300px;
  height: 100%;
  background-color: var(--background);
  box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  overflow-y: auto;
  animation: slideInLeft 0.3s ease-in-out;
}

/* 菜单关闭按钮 */
.mobile-menu-close {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  border-bottom: 1px solid var(--border);
}

.mobile-menu-close button {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--foreground);
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-menu-close button:hover {
  color: var(--primary);
}

/* 菜单项 */
.mobile-menu-items {
  display: flex;
  flex-direction: column;
  padding: 1rem 0;
}

.mobile-menu-items a {
  display: block;
  padding: 1rem;
  color: var(--foreground);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  transition: all 0.2s ease;
}

.mobile-menu-items a:hover {
  background-color: var(--secondary);
  color: var(--primary);
  padding-left: 1.5rem;
}

.mobile-menu-items a.active {
  background-color: var(--secondary);
  color: var(--primary);
  font-weight: 600;
}

/* 动画 */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideInLeft {
  from {
    transform: translateX(-100%);
  }
  to {
    transform: translateX(0);
  }
}

/* 响应式：在大屏幕上隐藏菜单按钮和菜单 */
@media (min-width: 768px) {
  .menu-toggle {
    display: none !important;
  }
  
  .mobile-menu {
    display: none !important;
  }
  
  .nav-menu {
    display: flex !important;
  }
}

/* 响应式：在小屏幕上隐藏导航菜单 */
@media (max-width: 767px) {
  .nav-menu {
    display: none;
  }
  
  .menu-toggle {
    display: block;
  }
}

/* 首页H1 不能直接display:hidden */
#home-title{position: absolute;width: 1px;height: 1px;padding: 0; margin: -1px;overflow: hidden; clip: rect(0, 0, 0, 0); border: 0;}

#article-content img{max-width: 100%;height: auto;display: block;}