.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: #fff;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.head-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 40px;
  max-width: 1400px;
  margin: 0 auto;
}

.head-logo {
  margin: 0;
  padding: 0;
}

.head-logo img.hlimg1 {
  display: block;
  height: 40px;
}

.head-logo img.hlimg2 {
  display: none;
}

.nav {
  display: flex;
  align-items: center;
}

.yj-bot {
  display: flex;
  margin: 0;
  padding: 0;
  list-style: none;
}

.yj-bot li {
  margin: 0 15px;
  position: relative;
}

.yj-link {
  color: #000 !important;
  font-size: 16px;
  text-decoration: none;
  padding: 10px 0;
  display: block;
  font-weight: 500;
}

.yj-link:hover,
.yj-bot li.active .yj-link {
  color: #30688E !important;
}

/* 下拉菜单样式 */
.ej-list {
  display: none !important;
  opacity: 0 !important;
  visibility: hidden !important;
}

.nav li:hover .ej-list,
.nav li.active .ej-list {
  display: block !important;
  opacity: 1 !important;
  visibility: visible !important;
  transform: translateY(0) !important;
}

.el-link {
  color: #000 !important;
  font-size: 14px;
  text-decoration: none;
  padding: 8px 20px;
  display: block;
}

.el-link:hover {
  color: #30688E !important;
  background: #f5f5f5;
}

.product-banner {
  position: relative;
  width: 100%;
  height: 250px;
  overflow: hidden;
}

.product-banner-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.product-banner-text {
  position: absolute;
  left: 40px;
  top: 40px;
  color: #fff;
  z-index: 2;
  text-shadow: 0 2px 8px rgba(0,0,0,0.25);
}

.product-banner-text .main-title {
  font-size: 54px;
  font-weight: bold;
  line-height: 1.2;
  margin-bottom: 10px;
  letter-spacing: 2px;
}

.product-banner-text .sub-title {
  font-size: 28px;
  line-height: 1.2;
  letter-spacing: 1px;
}

.news-detail {
  margin-top: 0 !important;
}