html {
  height: 100%;
}

body {
  width: 100%;
  height: 100%;
  font-family: 游ゴシック体, 'Yu Gothic', YuGothic, メイリオ, 'Hiragino Kaku Gothic ProN', sans-serif;
  background: url("../img/bg.jpg") no-repeat center center fixed;
  background-size: cover;
}

a {
  text-decoration: none;
  color: inherit;
}

a:hover {
  text-decoration: underline;
}

.container span,
.container p,
.container div {
  line-height: 1.6;
}

.mailform dl {
  margin: 15px auto;
}

.mailform .blue {
  background-color: #124fb9;
}

.mailform .blue:after {
  border-color: #124fb9 transparent transparent transparent;
}

.mailform .light-blue {
  background-color: #77a4f2;
}

.mailform .light-blue:after {
  border-color: #77a4f2 transparent transparent transparent;
}

.mailform dt {
  position: relative;
  color: white;
  font-size: 14px;
}

.mailform dt:after{
  display: block;
  content: "";
  width: 0px;
  height: 0px;
  position: absolute;
  bottom: -5px;
  left: 10px;
  border-style: solid;
  border-width: 5px 10px 0 10px;
}

.submit_content dt {
  position: relative;
  background-color: #124fb9;
  color: white;
  font-size: 14px;
}

.submit_content dt:after{
  display: block;
  content: "";
  width: 0px;
  height: 0px;
  position: absolute;
  top: calc(50% - 8px);
  right: -8px;

  border-style: solid;
  border-color: transparent transparent transparent #124fb9;
  border-width: 8px 0px 8px 8px;
}