Why does the site adapt in the browser when you click view on the phone, but not on the mobile device?

Question

css

Why does the site adapt in the browser when you click view on the phone, but not on the mobile device?
f0186535.xsph.ru/one/one.html
Here is the adaptation code

@media screen and (max-width: 480px) 
{
  body
  {
    margin: 0;
    padding: 0;
    height:100%;
  }

  .main

  {
    width: 90%;
  }

  .header

  {
    width: 100%;
    height: 120px;
    text-align: center
  }
  
  .container-socialmedia
  {
    display: block;
    width: 100%;
    margin: 0;
  }

  .navigation
  {
    width: 100%;
    display: block;
    height: 160px;
  }

  .menu-container
  {
    width:100%;
    height: 120px;
    margin: 0;
  }

  .container-item-menu
  {
    width: 100%;
    height: 20px;
  }

  .item
  {
    line-height: 20px;
    outline: 1px solid #252323;
  }

  .item:hover
  {
    border:none;
  }


  .text-menu
  {
    font:  10px/10px 'Open Sans',sans-serif;
    color:#9a9a9a;
  }

  .search-container
  {
    width: 100%;
    margin: 0;
    height: 40px;
  }
  .search-wrapper
  {
    width:100%;
    line-height: 40px;
    text-align: center;
  }

  .search
  {
    background: white;
    width:90%;
    font-size: 15px;
  }
  hr
  {
    display: none;
  }

  .middle
  {
    width: 100%;
    height: auto;
  }
  .middle-title
  {
    font:  20px/20px 'Open Sans',sans-serif;
  }

  .middle-top
  {
    width: 100%;
    height: auto;
  }

  .middle-center
  {
    width: 100%;
    height: auto;
  }

  .tv
  {
    display: inline-block;
    width:100%;
    height: auto;
    margin:0;
  }

  .pencil
  {
    display: inline-block;
    width:100%;
    height: auto;
    margin:0;
  }

  .mountains
  {
    display: inline-block;
    width:100%;
    margin:0;
    height: auto;
  }

  .content
  {
    width:100%;
    height: auto;
  }
  .content-center
  {
    width:100%;
    height: auto;
  }

  .content-item
  {
    width: 100%;
    height: auto;
    margin: 0;
  }
  .content-item-img
  {
    height: auto;
  }

  .brand
  {
    width: 100%;
    height:auto;
    margin:0;
  }
  .brand-item
  {
    width: 100%;
    line-height: 120px;
    height: 120px;

  }

  .basement
  {
    width: 100%;
    height:auto;
  }

  .basement-item-container
  {
    width: 100%;
    height:auto;
  }
  .basement-item
  {
    width:100%;
    height: auto;
    border-bottom: 4px solid #5c5c5c;
  }

  .header-basement
  {
  
    text-align: center;
  }
  .text-basement
  {
    text-align: center;

  }
  .basement-picture
  {
    text-align: center;
  }

  .basement-picture-two
  {
    text-align: center;
  }



  .down-basement
  {
    width:100%;

  }

  .container-publishing
  {
    width:100%;
  }

  .all
  { /*сркывает все, что находится за пределами этого блока*/
  		display: none;	
  }

  .container-publishing
  {
    margin: 0px;
  }

https://jsfiddle.net/tb85Lzcq/1/

Answer 1

Apparently the viewport is not set for mobile devices:
Set in the head of html files