/* 基础样式 */
.btn {
  display: inline-block;
  padding: 8px 20px;
  background-color: #8b5a2b;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.btn:hover {
  background-color: #6d4722;
  color: white;
}

.btn-outline {
  background-color: transparent;
  border: 1px solid #8b5a2b;
  color: #8b5a2b;
}

.btn-outline:hover {
  background-color: #8b5a2b;
  color: white;
}

.text-center {
  text-align: center;
  margin: 20px 0;
}

/* 顶部导航栏 */
.top-bar {
  background-color: #f0e6d2;
  padding: 8px 0;
}

.top-bar .container {
  display: flex;
  justify-content: space-between;
}

.top-links a {
  margin-left: 10px;
  color: #666;
}

.top-links a:hover {
  color: #8b5a2b;
}

/* 主头部 */
.main-header {
  background-color: white;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.main-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo h2 {
  color: #8b5a2b;
  margin-bottom: 5px;
}

.logo p {
  color: #666;
}

.search-box {
  display: flex;
  width: 400px;
}

.search-box input {
  flex: 1;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 4px 0 0 4px;
  outline: none;
}

.search-box button {
  padding: 0 15px;
  background-color: #8b5a2b;
  color: white;
  border: none;
  border-radius: 0 4px 4px 0;
  cursor: pointer;
}

.contact p {
  color: #666;
  font-size: 16px;
}

/* 主菜单导航 */
.main-nav {
  background-color: #8b5a2b;
}

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

.main-nav li {
  position: relative;
}

.main-nav li a {
  display: block;
  padding: 15px 20px;
  color: black;
  font-size: 16px;
}

.main-nav li a:hover {
  background-color: #6d4722;
}

/* 下拉菜单 */
.dropdown-content {
  display: none;
  position: absolute;
  background-color: white;
  min-width: 160px;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
  z-index: 1;
}

.dropdown-content a {
  color: #333;
  padding: 12px 16px;
  display: block;
}

.dropdown-content a:hover {
  /*background-color: #f0e6d2;*/
  color: white;
}

.dropdown:hover .dropdown-content {
  display: block;
}

/* 页面标题 */
.page-header {
  background-color: #f8f9fa;
  text-align: center;
}

.page-header .container {
  max-width: 1200px;
  margin: 0 auto;
}

.page-header h2 {
  color: #333;
  margin-bottom: 10px;
}

.page-header h5 {
  color: #666;
}

/* 页面内容 */
.container {
  width: 1200px;
  margin: 0 auto;
}

.content-block {
  margin-bottom: 40px;
}

.content-block h3 {
  color: #8b5a2b;
  margin-bottom: 20px;
}

.content-block p {
  line-height: 1.6;
  margin-bottom: 20px;
}

.grid-card {
  background-color: #f9f9f9;
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 20px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.grid-card h5, .grid-card h5 a {
  color: #8b5a2b;
  margin-bottom: 10px;
}

.grid-card p {
  margin: 5px 0;
}

.grid-card.transform {
  transition: transform 0.3s, box-shadow 0.3s;
}

.grid-card.transform:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

/* 页脚 */
.main-footer {
  background-color: #2c3e50;
  color: white;
  padding: 50px 0 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.footer-col h5 {
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h5:after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 50px;
  height: 2px;
  background-color: #8b5a2b;
}

.footer-col p {
  margin-bottom: 10px;
  color: #ecf0f1;
}

.footer-col ul {
  list-style: none;
}

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

.footer-col ul li a {
  color: #ecf0f1;
}

.footer-col ul li a:hover {
  color: #8b5a2b;
}

.social-links {
  margin-bottom: 20px;
}

.social-links a {
  display: inline-block;
  width: 40px;
  height: 40px;
  background-color: #34495e;
  color: white;
  border-radius: 50%;
  text-align: center;
  line-height: 40px;
  margin-right: 10px;
  transition: background-color 0.3s;
}

.social-links a:hover {
  background-color: #8b5a2b;
}

.newsletter input {
  width: 100%;
  padding: 10px;
  margin-bottom: 10px;
  border: none;
  border-radius: 4px;
}

.newsletter button {
  width: 100%;
  padding: 10px;
  background-color: #8b5a2b;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.copyright {
  text-align: center;
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid #34495e;
}

.copyright p, .copyright a {
  color: #bdc3c7;
}

/* 响应式设计 */
@media (max-width: 1200px) {
  .container {
    width: 100%;
  }
}

@media (max-width: 992px) {
  .services-grid, .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .works-grid, .knowledge-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .main-header .container {
    flex-direction: column;
  }

  .logo, .search-box, .contact {
    margin-bottom: 15px;
  }

  .search-box {
    width: 100%;
  }
}

@media (max-width: 768px) {
  .main-nav ul {
    flex-direction: column;
  }

  .dropdown-content {
    position: static;
    box-shadow: none;
  }

  .slider {
    height: 300px;
  }

  .slide-text {
    max-width: 80%;
  }

  .slide-text p {
    font-size: 16px;
  }
}

@media (max-width: 576px) {
  .services-grid, .products-grid, .works-grid, .knowledge-grid {
    grid-template-columns: 1fr;
  }

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

  .slider {
    height: 200px;
  }

  .slide-text {
    padding: 15px;
  }

  .slide-text p {
    margin-bottom: 10px;
  }

  .slide-text .btn {
    padding: 5px 10px;
  }
}