.center {
    text-align: center;
}

.about-ofice {
    font-size: 20px;
    font-weight: bold;

}

.security {
    max-width: 60%;
    margin: auto;
    font-size: 18px;
    font-weight: 400
}

.rectangle-containe {
    margin: auto;
    text-align: center;
    margin: 50px;
}

.about {
    text-align: center;
    padding-top: 40px;
    background: linear-gradient(transparent 80%, #F4EDD3 80%);
    width: 900px;
    margin: auto;
    font-size: 30px;
    font-weight: bold;
    margin-bottom: 20px;
}
.breadcrumb {
  margin: 0;
  padding: 0;
  list-style: none;
  margin-left:50px;
  
}

.breadcrumb li {
  display: inline;/*横に並ぶように*/
  list-style: none;
  font-size: small;
  margin-top: 10px;
  
}

.breadcrumb li:after {
  /* >を表示*/
  content: '>';
  padding: 0 0.2em;
  
}

.breadcrumb li:last-child:after {
  content: '';
}
li[itemprop="itemListElement"] a {
      color: rgb(5, 5, 5); 
      text-decoration: none; 
}



@media (max-width: 768px) {
    .about {
        width: 300px;
        font-weight: bold;
        font-size: 20px;
    }

    .about-ofice {
        font-size: 25px;
    }

    .img {
        width: 100%;
        padding-bottom: 10px;
    }

    .security {
        font-size: 15px;
        max-width: 90%;
        padding-top: 20px;
    }
        .span-url {
        max-width: 90%;
       margin-top:50px;
       margin-left: -5px;
    }
    .breadcrumb li {
    font-size: small;
    margin-left: 2px;

        }

}