@media only screen and (min-width: 1551px) {
    body {max-width:1920px;margin:auto;}
    .menu-right {right: 0;position: fixed;z-index: 99999;}
.allchinh {/* margin-top:-300px */}
}

@media only screen and (max-width: 1550px) {
body {}
.menu-right {right: 0;position: fixed;z-index: 99999;}
}

@media only screen and (max-width: 1439px) {
  .menu-right {right: 0;position: fixed;z-index: 99999;}  
}

@media only screen and (max-width: 1359px) {
      .menu-right {right: calc((100% - 1285px) / 2);position: fixed;z-index: 99999;}  
      body {min-width:1263px;width:100%;margin:auto;}
}

@media only screen and (max-width: 1279px) {
}

@media only screen and (max-width: 1150px) {
}


@media only screen and (max-width: 1023px) { 
}


@media only screen and (max-width: 900px) {
}


@media only screen and (max-width: 767px) {
}

@media only screen and (max-width: 639px) {
}


@media only screen and (max-width: 479px) {
}


@media only screen and (max-width:409px) {
}

@media only screen and (max-width:369px) {
}

@media only screen and (max-width:359px) {

}

@media only screen and (max-width:319px) {
}