@media screen and (min-width: 850px) {
  .pc{
    display: block;
  }
  .sp{
    display: none !important;
  }
  header{
    width: 100%;
    height: 80px;
    border-top: 3px solid #3093d8;
    border-bottom:1px solid #f1f1f1;
    position: fixed;
    top:0;
    z-index: 500;
    background-color: rgba(255, 255, 255, 100);
  }



  p.sub_logo{
    width: 263px;
    height: 90px;
    position: absolute;
    top: -235%;
    left: 3%;
  }

  ul.main_nav {
    display: flex;
    flex-flow: row;
    justify-content: flex-end;
    padding-top: 27px;
  }
  ul.main_nav li a{
    letter-spacing: 2px;
    font-size: 85%;
    color: #444;
    margin: 0 40px 0 0;
    }
  ul.main_nav li a {
    position: relative;
    display: inline-block;
    transition: .3s;
  }
  ul.main_nav li a:hover {
    color: #1baad1;
  }
  ul.main_nav li a::after {
    position: absolute;
    bottom: 0;
    left: 0;
    content: '';
    width: 0;
    height: 2px;
    background-color: #1baad1;
    transition: .3s;
  }
  ul.main_nav li a:hover::after {
    width: 100%;
  }

  .sub_logo{
    width: 285px;
    height: 30px;
    position: fixed;
    left:0;
    top: 79px;
    z-index: 9998;
    border-right:1px solid #f1f1f1;
    border-bottom:1px solid #f1f1f1;
    border-radius:0 0 5px 0;
    background-color: rgba(255, 255, 255, 100);
  }
  p.logo{
    position: relative;
    left: 9px;
    top: -65px;
    z-index: 9999;
  }

  .sub_nav{
    width: 550px;
    height: 77px;
    position: fixed;
    right:0;
    top: 79px;
    border-left:1px solid #f1f1f1;
    border-bottom:1px solid #f1f1f1;
    z-index: 9999;
    border-radius:0 0 0 5px;
    background-color: rgba(255, 255, 255, 0.98);
  }
  .contact_banner_01{
    width: 160px;
    height: 65px;
    position: absolute;
    top: 3px;
    left: 10px;
  }

  /* ベース：バナー全体を relative にしてドロップダウンを絶対配置できるように */
  .contact_banner_01 {
    position: relative;
    display: inline-block; /* 横に並べたい場合は inline-block */
  }

  /* ドロップダウン非表示 */
  .contact_banner_01 .dropdown_menu {
    list-style: none;
    margin: 0;
    padding: 0;
    position: absolute;
    top: 100%; /* バナーの下に出す */
    left: 0;
    min-width: 165px;
    background: #fff;
    letter-spacing: 1px;
    border: 1px solid #ddd;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.25s ease, transform 0.25s ease;
    z-index: 1000;
  }

  /* 項目 */
  .contact_banner_01 .dropdown_menu li {
    border-bottom: 1px solid #eee;
  }
  .contact_banner_01 .dropdown_menu li:last-child {
    border-bottom: none;
  }

  /* リンクスタイル */
  .contact_banner_01 .dropdown_menu li a {
    display: block;
    padding: 10px 14px;
    text-decoration: none;
    font-size: 14px;
    color: #333;
    transition: background 0.2s, color 0.2s;
  }
  .contact_banner_01 .dropdown_menu li a:hover {
    background: #3093d7;
    color: #fff;
  }

  /* ホバー時にドロップダウン表示 */
  .contact_banner_01:hover .dropdown_menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }



  .contact_banner_02{
    width: 160px;
    height: 65px;
    position: absolute;
    top: 3px;
    left: 185px;
  }

  .contact_banner_03{
    width: 160px;
    height: 65px;
    position: absolute;
    top: 3px;
    left: 360px;
  }
  footer{
    margin: 220px auto 0;
  }
  footer .logo{
    width: 270px;
    height: 140px;
  }
  footer .footer-nav ul{
    justify-content: center;
  }
  footer .footer-nav li:hover a{
    color: #0a66c2;
  }
}