.pc{
  position:relative;
}
.pc .header {
  width: 100%;
  padding: 0 2.4rem 0 2.55rem;
  height: 0.82rem;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: white;
  position:fixed;
  top:0;
  z-index:999;
}
.pc .header .logo {
  display: block;
  width: 4.33rem;
  height: 0.56rem;
  margin-right: 2rem;
}
.pc .header .nav {
  width: 5.5rem;
  display: flex;
  justify-content: space-between;
  font-size: 0.18rem;
  color: #3c4b5a;
}
.pc .header .nav a {
  color: #3578d3 !important;
}
.pc .header .nav a:hover,
.pc .header .nav a.active {
  color: #163175 !important;
  font-weight: 600;
}
.pc .header .phone {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: nowrap;
}
.pc .header .phone .phone-logo {
  width: 0.32rem;
  height: 0.32rem;
  display: block;
}
.pc .header .phone .phone-text {
  margin-left: 0.1rem;
  color: #163175;
  font-size: 0.12rem;
}
@media screen and (max-width: 768px) {
  .h5{
    position:relative;
  }
  .h5 .h5-nav{
    width: 100%;
    height: 1.3rem;
    z-index: 999; 
    position: fixed;
    top:0;
  }
  .h5 .header {
    width: 100%;
    height: 1.3rem;
    padding: 0.42rem 0.4rem 0.3rem 0.32rem;
    display: flex;
    justify-content: space-between;
    box-sizing: border-box;
    align-items: center;
    position: relative;
    background-color: white;
    z-index:888;
  }
  .h5 .header .logo {
    width: 4.4rem;
    height: 0.6rem;
  }
  .h5 .header ul {
    width: 0.4rem;
    height: 0.3rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
  }
  .h5 .header ul li {
    width: 100%;
    height: 0.06rem;
    background-color: #14408e;
    border-radius: 0.3rem;
  }
  .h5 .nav-menu {
    width: 100%;
    background-color: rgba(20, 64, 142, 0.949);
    position: absolute;
    top: 1.27rem;
    left: 0;
    transform: translateY(-100%);
    padding: 0.2rem 0.46rem 0.8rem;
    box-sizing: border-box;
    color: white;
    font-size: 0.32rem;
    z-index:777;
  }
  .h5 .nav-menu .nav-item {
    width: 100%;
  }
  .h5 .nav-menu .nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    text-decoration: none;
    font-size: 16px;
    transition: all 0.2s;
    cursor: pointer;
  }
  .h5 .nav-menu .nav-link a{
    color: white;
     width:100%;
  }
  .h5 .nav-menu .nav-link-left {
    display: flex;
    align-items: center;
    gap: 12px;
    width:100%;
  }
  .h5 .nav-menu .nav-icon {
    font-size: 20px;
    width: 28px;
  }
  .h5 .nav-menu .nav-arrow {
    font-size: 14px;
    color: #999;
    transition: transform 0.3s ease;
  }
   .h5 .nav-menu .nav-arrow img{
     width:0.37rem;
     height:0.16rem;
  }
  .h5 .nav-menu .nav-item.expanded .nav-arrow {
    transform: rotate(180deg);
  }
  .h5 .nav-menu .submenu {
    display: flex;
    flex-wrap: wrap;
    padding: 0 0.3rem;
    justify-content: space-between;
    transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    max-height: 0;
    overflow: hidden;
  }
  .h5 .nav-menu .submenu .submenu-item {
    border-radius: 0.35rem;
    background-color: rgba(255, 255, 255, 0.8);
    width: 2.6rem;
    height: 0.69rem;
    text-align: center;
    line-height: 0.69rem;
    color: #14408e;
    transition: all 0.2s;
  }
  .h5 .nav-menu .submenu .submenu-item:nth-of-type(3),
  .h5 .nav-menu .submenu .submenu-item:nth-of-type(4) {
    margin: 0.3rem 0;
  }
  .h5 .nav-menu .submenu .submenu-item:nth-of-type(5) {
    margin-bottom: 0.5rem;
  }
  .h5 .nav-menu .nav-item.expanded .submenu {
    max-height: 4.5rem;
    /* 足够容纳所有子项 */
  }
  .h5 .nav-menu .nav-item.expanded {
    background: linear-gradient(to right, rgba(20, 64, 142, 0) 0%, #0c2758 50%, rgba(20, 64, 142, 0) 100%);
    background-size: 6.67rem 3.86rem;
  }
  .h5 .nav-menu .submenu-item:active {
    font-weight: 600;
  }
  .h5 .nav-menu .submenu-item.active {
    font-weight: 600;
  }
  .h5 .nav-menu .nav-line {
    width: 6.59rem;
    height: 1px;
  }
  .h5 .nav-open {
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    border-radius: 0 0 20px 20px;
    transform: translateY(0);
  }
}