* {
  margin: 0;
  padding: 0;
}

div#index {
    width:100%;
    min-width: unset;
    max-width: unset;
}
div#indexheader,
div#key_area {
    background-color: #f2f2f2;
}

#indexheader #pan{
    width: 850px;
    padding: 5px 0;
    margin: 0 auto 0;
    border: none;
}

div#topicsmainfull {
    width:900px;
}

#setup .commentl {
    text-align: left;
    line-height: 1.5;
    font-size: 120%;
    margin: .3em 0;
}
#setup h2 {
    font-size: 50px;
    font-weight: 600;
    border-bottom: none;
    margin: 30px auto 15px;
    text-align: center;
}
#setup h3 {
    font-size: 22px;
    border: none;
    margin: 15px auto;
    text-align: center;
    background: #eee;
    border-radius: 10px;
    padding: 14px 0;
}

#setup h4 {
    border: none;
    text-align: center;
    font-size: 14px;
}
.setup_list{
    display: flex;
    justify-content: space-evenly;
    flex-wrap: wrap;
}
.setup_list > div{width:46%;margin:10px auto 30px}

ul.bousi_img{
    display: flex;
    justify-content: space-evenly;
    flex-wrap: wrap;
}
ul.bousi_img li {
    width: 45%;
}


/****リンクボタン****/
.linkbtn {
    width: 100%%;
    border: 1px #ccc solid;
    clear: both;
    position: relative;
    margin-bottom: 10px;
}
.linkbtn a {
    color: #333;
    font-size: 14px;
    display: block;
    padding: 10px;
}
.linkbtn:after {
  content: '';
  width: 8px;
  height: 8px;
  border: 0px;
  border-top: solid 2px #ccc;
  border-right: solid 2px #ccc;
  -ms-transform: rotate(45deg);
  -webkit-transform: rotate(45deg);
  transform: rotate(45deg);
  position: absolute;
  top: 50%;
  right: 10px;
  margin-top: -4px;
}