* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

body {
  line-height: 1.6;
  color: #333;
  background-color: #f8fafc;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 头部导航样式 - 修改为纯色背景 */
header {
  background-color: #1e3c72;
  color: white;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
  position: relative;
}

.logo-area {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
}

.logo {
  display: flex;
  align-items: center;
  margin-bottom: 5px;
}

.logo-link {
  display: flex;
  align-items: center;
  transition: opacity 0.3s;
}

.logo-link:hover {
  opacity: 0.9;
}

.logo-icon {
  width: 40px;
  height: 40px;
  margin-right: 10px;
  background-color: #fff;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #1e3c72;
  font-weight: bold;
}

.site-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: white;
}

.site-subtitle {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.85);
  font-weight: 300;
  letter-spacing: 0.5px;
  margin-left: 50px;
}

/* 桌面端导航 */
.desktop-nav {
  display: flex;
  align-items: center;
}

.desktop-nav ul {
  display: flex;
  list-style: none;
}

.desktop-nav li {
  margin-left: 25px;
}

.desktop-nav a {
  font-weight: 500;
  font-size: 1.05rem;
  padding: 8px 0;
  position: relative;
  transition: color 0.3s;
}

.desktop-nav a:hover {
  color: #a3d5ff;
}

.desktop-nav a.active {
  color: #a3d5ff;
}

.desktop-nav a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: #a3d5ff;
}

/* 原则链接样式 */
.principles-link {
  margin-left: 25px;
  font-weight: 500;
  font-size: 1.05rem;
  padding: 8px 0;
  transition: color 0.3s;
}

.principles-link:hover {
  color: #a3d5ff;
}

/* 搜索框样式 - 桌面端 */
.search-container {
  display: flex;
  align-items: center;
  margin-left: 20px;
}

.search-form {
  display: flex;
  align-items: center;
}

.search-input {
  padding: 8px 15px;
  border: none;
  border-radius: 20px 0 0 20px;
  background-color: rgba(255, 255, 255, 0.9);
  width: 200px;
  font-size: 0.95rem;
  transition: width 0.3s;
}

.search-input:focus {
  outline: none;
  width: 250px;
  background-color: white;
}

.search-button {
  background-color: #2a5298;
  color: white;
  border: none;
  padding: 8px 20px;
  border-radius: 0 20px 20px 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  transition: background 0.3s;
}

.search-button:hover {
  background-color: #3a62a8;
}

.search-button i {
  font-size: 1rem;
}

/* 主要内容区域 */
.main-content {
  padding: 30px 0;
}

.section-title {
  font-size: 1.8rem;
  margin-bottom: 25px;
  color: #1e3c72;
  padding-bottom: 10px;
  border-bottom: 2px solid #e6f0ff;
  display: flex;
  align-items: center;
}

.section-title i {
  margin-right: 10px;
  font-size: 1.5rem;
}

/* 页脚样式 */
footer {
  background-color: #1e3c72;
  color: white;
  padding: 40px 0 20px;
  margin-top: 50px;
}

.footer-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
  margin-bottom: 30px;
}

.footer-section h3 {
  font-size: 1.2rem;
  margin-bottom: 20px;
  color: #a3d5ff;
}

/* 页脚导航两列布局 */
.footer-navigation {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  transition: color 0.3s;
}

.footer-links a:hover {
  color: #a3d5ff;
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.9rem;
  color: #ccc;
}

.footer-bottom a {
  color: #a3d5ff;
}

/* 公安备案样式 */
.gongan-record {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 10px;
}

.gongan-logo {
  width: 16px;
  height: 16px;
  margin-right: 5px;
  border-radius: 2px;
  display: inline-block;
  position: relative;
}

.gongan-logo::before {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #1e3c72;
  font-size: 10px;
  font-weight: bold;
}

.icp {
  margin-top: 10px;
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 5px;
  margin-left: 15px;
}

/* 移动端菜单容器 */
.mobile-menu-container {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background-color: #1e3c72;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  z-index: 999;
  padding: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.mobile-nav ul {
  list-style: none;
}

.mobile-nav li {
  margin-bottom: 15px;
}

.mobile-nav a {
  display: block;
  padding: 10px 0;
  font-size: 1.1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-nav a:last-child {
  border-bottom: none;
}

.mobile-principles-link {
  display: block;
  padding: 15px 0;
  font-weight: 500;
  font-size: 1.1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 15px;
}

/* 移动端搜索框 - 只在移动端显示 */
.mobile-search-container {
  display: none;
}

/* 响应式设计 */
@media (max-width: 1100px) {
  .search-input {
    width: 180px;
  }

  .search-input:focus {
    width: 220px;
  }
}

@media (max-width: 992px) {
  .news-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
  }

  .headline-title {
    font-size: 1.6rem;
  }

  .desktop-nav li {
    margin-left: 15px;
  }

  .principles-link {
    margin-left: 15px;
  }

  .search-input {
    width: 160px;
  }

  .search-input:focus {
    width: 200px;
  }
}

/* 移动端布局优化 - 768px以下 */
@media (max-width: 768px) {
  .news-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
  }

  .news-card {
    height: 360px;
  }

  .card-image {
    height: 160px;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .headline-content {
    flex-direction: column;
  }

  .headline-image {
    height: 250px;
    min-width: 100%;
  }

  .headline-details {
    padding: 20px;
  }

  .headline-title {
    font-size: 1.4rem;
  }

  /* 手机端头部布局优化 */
  .header-container {
    flex-wrap: nowrap;
    padding: 10px 0;
    align-items: center;
  }

  .logo-area {
    flex: 1;
    align-items: flex-start;
    margin-bottom: 0;
    max-width: 50%;
  }

  .logo {
    margin-bottom: 2px;
  }

  .site-subtitle {
    font-size: 0.75rem;
    margin-left: 50px;
    text-align: left;
    line-height: 1.3;
  }

  /* 隐藏桌面导航、原则链接和桌面搜索框 */
  .desktop-nav, .principles-link, .search-container {
    display: none;
  }

  /* 显示移动端搜索框和菜单按钮 */
  .mobile-search-container {
    display: flex;
    align-items: center;
    order: 2;
    margin-left: 10px;
  }

  .mobile-menu-toggle {
    display: block;
    margin-left: 10px;
    order: 3;
  }

  .mobile-search-form {
    display: flex;
    align-items: center;
  }

  .mobile-search-input {
    padding: 6px 12px;
    border: none;
    border-radius: 20px 0 0 20px;
    background-color: rgba(255, 255, 255, 0.9);
    width: 150px;
    font-size: 0.9rem;
  }

  .mobile-search-input:focus {
    outline: none;
    background-color: white;
  }

  .mobile-search-button {
    background-color: #2a5298;
    color: white;
    border: none;
    padding: 6px 15px;
    border-radius: 0 20px 20px 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: background 0.3s;
  }

  .mobile-search-button:hover {
    background-color: #3a62a8;
  }

  /* 页脚导航两列布局调整 */
  .footer-navigation {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .footer-container {
    grid-template-columns: 1fr;
    gap: 25px;
  }
}

@media (max-width: 576px) {
  .news-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .container {
    padding: 0 15px;
  }

  .header-container {
    flex-direction: row;
    flex-wrap: nowrap;
    align-items: center;
  }

  .logo-area {
    max-width: 45%;
  }

  .site-subtitle {
    font-size: 0.7rem;
  }

  .mobile-search-input {
    width: 120px;
  }

  .mobile-menu-toggle {
    margin-left: 8px;
  }
}

@media (max-width: 400px) {
  .logo-area {
    max-width: 50%;
  }

  .site-subtitle {
    display: none; /* 在非常小的屏幕上隐藏口号 */
  }

  .mobile-search-input {
    width: 100px;
  }
}