body {
  margin: 0;
}
header {
  position: fixed;
  top: 0;
  z-index: 100;
  width: 100%;
}
h1 {
  padding: 0;
  font-size: 0;
}
.header-wrap {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  width: 100%;
}
.header-wrap .wrap {
  margin: 0 auto;
  width: 1200px;
  height: 60px;
  display: flex;
  align-items: center;
}
.header-wrap img {
  object-fit: contain;
}
.header-wrap .logo img {
  width: 160px;
  height: 25px;
}
.menu-wrap {
  display: flex;
  align-items: center;
  flex: 1;
  justify-content: space-between;
}
.header-wrap .logo {
  display: block;
  margin-right: 54px;
}
.nav {
  display: flex;
  font-size: 16px;
  color: #171a35;
  text-align: center;
}
.nav-item {
  position: relative;
  height: 60px;
}
.nav-popover {
  position: absolute;
  top: 65px;
  left: 0;
  width: 200px;
  background: #fff;
  box-shadow: 0 4px 12px 0 rgba(0, 0, 0, 0.05);
  border-radius: 8px;
  display: none;
}
.nav-popover-item {
}
.nav-popover::before {
  content: "";
  position: absolute;
  top: -13px;
  left: 25%;
  width: 0px;
  height: 0px;
  border-top: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 8px solid #ffffff;
  border-left: 8px solid transparent;
}
.nav-popover-item {
  padding-top: 20px;
}
.nav-link {
  display: flex;
  align-items: center;
  padding: 0px 38px;
  cursor: pointer;
  font-size: 16px;
  color: #181b3b;
  text-decoration: none;
  height: 60px;
  line-height: 60px;
}
.nav-link .icon-img,
.nav-second-link .icon-img {
  width: 24px;
  height: 24px;
}
.nav-link span,
.nav-second-link span {
  font-weight: 500;
  font-size: 14px;
  color: #181b3b;
  margin-left: 10px;
}
.nav-second-link {
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  padding: 8px 18px;
  cursor: pointer;
}
.login a {
  text-decoration: none;
  display: inline-block;
  margin-left: 20px;
  cursor: pointer;
}
.login button {
  height: 34px;
  line-height: 34px;
  border-radius: 17px;
  border: 1px solid #3a59ef;
  padding: 0 20px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
}
.btn-login {
  background: transparent;
  color: #3a59ef;
}
.btn-signup {
  background: #3a59ef;
  color: #fff;
}
</style > <style > .nav-popover {
  border-radius: 8px;
}