@import "product-common.css";
.banner {
  color: #fff;
  background: url(img/ressource/banner.jpg) no-repeat center center;
  background-size: cover;
  padding: 2.6875rem 0;
}
.banner h1 {
  font-size: 2.25rem;
  margin-bottom: 1rem;
  font-weight: 800;
}
.banner p {
  font-size: 1rem;
}
@media (max-width: 900px) {
  .banner {
    text-align: center;
  }
}
.subject {
  padding: 3rem 0;
}
.subject * {
  transition: 400ms linear;
}
.subject .flex-container {
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}
.subject .flex-container::after {
  content: '';
  width: 4px;
  height: 100%;
  background-color: #E7E7E7;
  position: absolute;
  left: 35.5%;
  top: 70px;
}
@media (max-width: 900px) {
  .subject .flex-container {
    flex-direction: column;
  }
  .subject .flex-container::after {
    display: none;
  }
}
.subject .list {
  flex: 0 0 32%;
}
.subject .list h2 {
  font-size: 2.25rem;
  color: #595757;
  font-weight: 800;
  margin-bottom: 1.5rem;
}
.subject .list ul li {
  font-size: 16px;
  color: #727171;
  font-weight: 800;
  line-height: 1.8;
  padding: 10px 0;
  border: 1px solid transparent;
  position: relative;
  padding-left: 25px;
}
.subject .list ul li::before {
  content: '';
  position: absolute;
  width: 0;
  height: 0;
  border-left: 9px solid #727171;
  border-top: 6px solid transparent;
  border-bottom: 6px solid transparent;
  margin-right: 12px;
  left: 0;
  top: 18px;
}
.subject .list ul li.choose {
  color: #2ea7e0;
  border-bottom-color: #2ea7e0;
}
.subject .list ul li.choose::before {
  border-left-color: #2ea7e0;
}
.subject .list ul li:hover {
  cursor: pointer;
  color: #2ea7e0;
  border-bottom-color: #2ea7e0;
}
.subject .list ul li:hover::before {
  border-left-color: #2ea7e0;
}
.subject .article {
  flex: 0 0 60%;
  padding-top: 86px;
}
.subject .article .content {
  padding: 20px 0;
}
.subject .article .content-box p {
  padding: 10px 0;
}
.subject .article .content-box a {
  display: block;
  font-size: 16px;
  color: #7a7a7a;
  position: relative;
  padding-left: 20px;
  line-height: 1.6;
}
.subject .article .content-box a::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: #7a7a7a;
  position: absolute;
  left: 0;
  top: 9px;
}
.subject .article .content-box a:hover {
  color: #2ea7e0;
}
.subject .article .content-box a:hover::before {
  background-color: #2ea7e0;
}
@media (max-width: 900px) {
  .subject .article {
    padding-top: 20px;
  }
}