.header_index {
    position: absolute;
    top: 0;
    width: 100%;
    z-index: 99;
}
.logo {
    margin-top: 45px;
    margin-left: 55px;
    display: inline-block;
}
.menu_open {
    position: absolute;
    top: 65px;
    right: 30px;
    z-index: 99;
    cursor: pointer;
}

@media (max-width: 1024px) {
  .logo {
    margin-top: 35px;
    margin-left: 35px;
    width: 160px;
  }
}

@media (max-width: 767px) {
  .menu_open {
    top: 20px;
    right: 20px;
  }
  .logo {
    margin-top: 20px;
    margin-left: 20px;
    width: 120px;
  }
}

@media (max-width: 426px) {
  .logo {
    margin-top: 10px;
    margin-left: 10px;
    width: 110px;
  }
}