body #chat_window .chat_box .chat_whatsapp{ background: #5f3cff url(https://wallexiflytek.com/static/t281/images/index/i1.svg) no-repeat center center; background-size: 25px;}  
  body #chat_window .chat_box .menu .top{background: #f2f2f2 url(https://wallexiflytek.com/static/t281/images/index/i2.svg) no-repeat center center; background-size: 21px;} 
  @media screen and (max-width: 1000px) {
      body #chat_window .chat_box .chat_whatsapp { background-size: 21px;}
      body #chat_window .chat_box .menu .top { background-size: 18px;}
  }