/* ============================================
   企业官网 - 公共样式
   颜色: 主色 #B22222 (深红色)
   ============================================ */

/* 重置样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.6;
  color: #333;
  background-color: #fff;
}

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

ul, ol {
  list-style: none;
}

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

/* ============================================
   变量定义
   ============================================ */
:root {
  --primary: #B22222;
  --primary-dark: #8B1E1E;
  --primary-light: #D32F2F;
  --white: #FFFFFF;
  --gray-50: #F5F5F5;
  --gray-100: #E5E5E5;
  --gray-200: #CCCCCC;
  --gray-300: #999999;
  --gray-400: #666666;
  --gray-500: #333333;
  --header-height: 70px;
  --header-height-mobile: 60px;
}

/* ============================================
   导航栏
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: var(--white);
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.navbar-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: var(--header-height);
}

.logo {
  font-size: 28px;
  font-weight: bold;
  color: var(--primary);
  font-family: serif;
}

.logo sup {
  font-size: 12px;
  margin-left: 2px;
}

/* 桌面导航 */
.nav-menu {
  display: flex;
  align-items: center;
}

.nav-item {
  position: relative;
  padding: 8px 16px;
  font-size: 15px;
  color: var(--gray-400);
  transition: all 0.3s ease;
  cursor: pointer;
}

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

.nav-item.active {
  background-color: var(--primary);
  color: var(--white);
}

/* 二级菜单 - 桌面端 */
.nav-item .dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 160px;
  background-color: var(--white);
  border: 1px solid var(--gray-100);
  border-top: 2px solid var(--primary);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.3s ease;
  z-index: 1001;
}

.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: block;
  padding: 12px 20px;
  font-size: 14px;
  color: var(--gray-400);
  border-bottom: 1px solid var(--gray-100);
  transition: all 0.3s ease;
  white-space: nowrap;
}

.dropdown-item:last-child {
  border-bottom: none;
}

.dropdown-item:hover {
  background-color: var(--gray-50);
  color: var(--primary);
}

.dropdown-item.active {
  background-color: var(--primary);
  color: var(--white);
}

/* 带下拉箭头的菜单项 */
.nav-item.has-dropdown::after {
  content: '';
  display: inline-block;
  width: 0;
  height: 0;
  margin-left: 6px;
  vertical-align: middle;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  transition: transform 0.3s ease;
}

.nav-item.has-dropdown:hover::after {
  transform: rotate(180deg);
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--gray-500);
  margin: 5px 0;
  transition: all 0.3s ease;
}

/* 移动端导航 */
.nav-menu-mobile {
  display: none;
  position: absolute;
  top: var(--header-height-mobile);
  left: 0;
  right: 0;
  background-color: var(--white);
  border-top: 1px solid var(--gray-100);
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

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

.nav-item-mobile {
  display: block;
  padding: 15px 20px;
  font-size: 15px;
  color: var(--gray-400);
  border-bottom: 1px solid var(--gray-100);
  transition: all 0.3s ease;
}

.nav-item-mobile:hover {
  color: var(--primary);
  background-color: var(--gray-50);
}

.nav-item-mobile.active {
  background-color: var(--primary);
  color: var(--white);
}

/* 移动端二级菜单 */
.nav-item-mobile.has-dropdown {
  position: relative;
}

.nav-item-mobile .dropdown-arrow {
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 5px solid currentColor;
  transition: transform 0.3s ease;
}

.nav-item-mobile.has-dropdown.expanded .dropdown-arrow {
  transform: translateY(-50%) rotate(180deg);
}

.dropdown-menu-mobile {
  display: none;
  background-color: var(--gray-50);
}

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

.dropdown-item-mobile {
  display: block;
  padding: 12px 20px 12px 40px;
  font-size: 14px;
  color: var(--gray-400);
  border-bottom: 1px solid var(--gray-100);
  transition: all 0.3s ease;
}

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

.dropdown-item-mobile.active {
  color: var(--primary);
  background-color: rgba(178, 34, 34, 0.1);
}

/* ============================================
   首页轮播图
   ============================================ */
.hero-carousel {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  margin-top: var(--header-height);
}

.carousel-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.7s ease-in-out;
}

.carousel-slide.active {
  opacity: 1;
}

.carousel-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
}

.carousel-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,0.3);
}

.carousel-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: var(--white);
  padding: 0 20px;
  width: 100%;
}

.carousel-title {
  font-size: 48px;
  font-weight: bold;
  margin-bottom: 20px;
  text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.carousel-subtitle {
  font-size: 24px;
  text-shadow: 0 2px 6px rgba(0,0,0,0.3);
}

/* 轮播控制按钮 */
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  background-color: rgba(255,255,255,0.2);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  z-index: 10;
}

.carousel-btn:hover {
  background-color: rgba(255,255,255,0.4);
}

.carousel-btn.prev {
  left: 20px;
}

.carousel-btn.next {
  right: 20px;
}

.carousel-btn svg {
  width: 24px;
  height: 24px;
  stroke: var(--white);
}

/* 轮播指示点 */
.carousel-dots {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: rgba(255,255,255,0.5);
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
}

.carousel-dot.active {
  background-color: var(--primary);
  width: 30px;
  border-radius: 5px;
}

/* ============================================
   页脚
   ============================================ */
.footer {
  background-color: var(--gray-50);
  border-top: 1px solid var(--gray-100);
}

.footer-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 50px 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}

.footer-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--gray-500);
  margin-bottom: 20px;
}

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

.footer-links a {
  color: var(--gray-300);
  font-size: 14px;
  transition: color 0.3s ease;
}

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

/* 社交媒体 */
.social-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
}

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

.social-icon {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 8px;
  font-size: 12px;
  color: var(--white);
  font-weight: bold;
}

.social-icon.green { background-color: #22c55e; }
.social-icon.blue { background-color: #3b82f6; }
.social-icon.wechat { background-color: #10b981; }

.social-name {
  font-size: 12px;
  color: var(--gray-300);
}

/* 联系信息 */
.footer-contact {
  margin-top: 40px;
  padding-top: 30px;
  border-top: 1px solid var(--gray-100);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 15px;
}

.contact-icon {
  width: 48px;
  height: 48px;
  background-color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--white);
}

.contact-label {
  font-size: 13px;
  color: var(--gray-300);
  margin-bottom: 4px;
}

.contact-value {
  font-size: 15px;
  color: var(--gray-400);
}

/* 版权信息 */
.footer-copyright {
  background-color: var(--white);
  border-top: 1px solid var(--gray-100);
  padding: 20px;
  text-align: center;
}

.footer-copyright p {
  font-size: 13px;
  color: var(--gray-300);
}

/* ============================================
   列表页样式
   ============================================ */
.page-header {
  padding: 40px 0;
  background-color: var(--white);
  border-bottom: 1px solid var(--gray-100);
  margin-top: var(--header-height);
}

.page-title {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  font-size: 28px;
  font-weight: bold;
  color: var(--primary);
}

.page-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
}

/* 列表项 */
.list-item {
  display: flex;
  gap: 25px;
  padding: 20px;
  background-color: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: 8px;
  margin-bottom: 20px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.list-item:hover {
  background-color: var(--gray-50);
}

.list-image {
  width: 280px;
  flex-shrink: 0;
  border-radius: 6px;
  overflow: hidden;
}

.list-image img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.list-item:hover .list-image img {
  transform: scale(1.05);
}

.list-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 5px 0;
}

.list-category {
  display: inline-block;
  padding: 4px 12px;
  background-color: rgba(178, 34, 34, 0.1);
  color: var(--primary);
  font-size: 12px;
  border-radius: 4px;
  margin-bottom: 12px;
  width: fit-content;
}

.list-title {
  font-size: 18px;
  font-weight: 500;
  color: var(--gray-500);
  line-height: 1.5;
  transition: color 0.3s ease;
}

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

.list-date {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--gray-300);
  font-size: 13px;
  margin-top: 15px;
}

.list-date svg {
  width: 14px;
  height: 14px;
  stroke: var(--primary);
}

/* 二级栏目筛选 */
.subcategory-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--gray-100);
}

.subcategory-btn {
  padding: 8px 20px;
  border: 1px solid var(--gray-100);
  background-color: var(--white);
  color: var(--gray-400);
  font-size: 14px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s ease;
}

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

.subcategory-btn.active {
  background-color: var(--primary);
  border-color: var(--primary);
  color: var(--white);
}

/* 分页 */
.pagination { padding:50px 10px 30px; text-align:center; }
.pagination a,.pagination span { display:inline-block; *display:inline; zoom:1; margin:0; padding:3px 8px; border:1px solid #d9d9d9; background:#fff; line-height: 20px; vertical-align: top;}
.pagination span { background:#b22222; border-color:#b22222; color:#fff; }
.pagination select { min-height:28px; line-height: 28px; }


/* ============================================
   详情页样式
   ============================================ */
.article-header {
  padding: 50px 0;
  background-color: var(--white);
  border-bottom: 1px solid var(--gray-100);
  margin-top: var(--header-height);
  text-align: center;
}

.article-title {
  max-width: 800px;
  margin: 0 auto 20px;
  padding: 0 20px;
  font-size: 28px;
  font-weight: bold;
  color: var(--gray-500);
  line-height: 1.4;
}

.article-date {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--gray-300);
  font-size: 14px;
}

.article-date svg {
  width: 16px;
  height: 16px;
  stroke: var(--primary);
}
.article-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 50px 20px;
}
.article-content img{ 
	max-width:100%; height:auto;
}

.article-body {
  font-size: 15px;
  line-height: 2;
  color: var(--gray-500);
}

.article-body p {
  margin-bottom: 20px;
}

.article-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--gray-500);
  margin: 35px 0 20px;
}

.article-body strong {
  font-weight: 600;
  color: var(--primary);
}

/* ============================================
   响应式设计 - 平板
   ============================================ */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .carousel-title {
    font-size: 40px;
  }
  
  .carousel-subtitle {
    font-size: 20px;
  }
}

/* ============================================
   响应式设计 - 手机
   ============================================ */
@media (max-width: 768px) {
  :root {
    --header-height: var(--header-height-mobile);
  }
  
  .navbar-container {
    height: var(--header-height-mobile);
  }
  
  .logo {
    font-size: 24px;
  }
  
  .nav-menu {
    display: none;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .hero-carousel {
    margin-top: var(--header-height-mobile);
    height: calc(100vh - var(--header-height-mobile));
  }
  
  .carousel-title {
    font-size: 28px;
  }
  
  .carousel-subtitle {
    font-size: 16px;
  }
  
  .carousel-btn {
    width: 40px;
    height: 40px;
  }
  
  .carousel-btn.prev {
    left: 10px;
  }
  
  .carousel-btn.next {
    right: 10px;
  }
  
  /* 页脚 */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  
  .social-grid {
    grid-template-columns: repeat(3, 80px);
    justify-content: center;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  /* 列表页 */
  .page-header {
    padding: 25px 0;
  }
  
  .page-title {
    font-size: 22px;
  }
  
  .list-item {
    flex-direction: column;
    gap: 15px;
  }
  
  .list-image {
    width: 100%;
  }
  
  .list-image img {
    height: 200px;
  }
  
  .list-title {
    font-size: 16px;
  }
  
  /* 详情页 */
  .article-header {
    padding: 30px 0;
  }
  
  .article-title {
    font-size: 20px;
  }
  
  .article-content {
    padding: 30px 20px;
  }
  
  .article-body {
    font-size: 14px;
  }
  
  .article-body h3 {
    font-size: 18px;
  }
}

/* ============================================
   小屏幕手机
   ============================================ */
@media (max-width: 480px) {
  .carousel-title {
    font-size: 24px;
  }
  
  .carousel-subtitle {
    font-size: 14px;
  }
  
  .page-title {
    font-size: 20px;
  }
  
  .article-title {
    font-size: 18px;
  }
}