.site-header{
  position: relative;
  overflow: visible !important;   /* KUNCI: dropdown jangan kepotong */
  z-index: 50;                    /* header di atas konten lain */
}

/* Background di belakang, tidak ganggu interaksi */
.site-header::before{
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;                    /* KUNCI: taruh paling bawah */
  pointer-events: none;

  background-image: url("http://plcl.me/images/LsV3Y.png");
  background-repeat: no-repeat;
  background-position: center center;
  background-size: 100% 100%;
}

/* Pastikan nav & dropdown ada di atas semuanya */
.site-header nav,
.site-header .navbar,
.site-header .menu,
.site-header .main-menu,
.site-header .nav{
  position: relative;
  z-index: 9999;
}

/* Kalau dropdown punya class khusus */
.site-header .dropdown-menu,
.site-header .sub-menu,
.site-header .submenu{
  position: absolute;
  z-index: 10000;
}

/* MOBILE */
@media (max-width: 768px){
  .site-header{
    overflow: hidden !important;
  }

  .site-header::before{
    background-size: auto 96px;
    background-repeat: repeat-x;
    background-position: right center;
    opacity: .95;
  }
}