#content.useful .title {
  background: url("../img/useful/bg_title.jpg") center top/cover no-repeat;
}
@media screen and (min-width: 768px) {
  #content.useful .inner {
    width: 1000px;
  }
}
#content.useful section h3 {
  border-bottom: 6px dotted #ff7817;
  color: #ff7817;
  font-size: 24px;
  padding-bottom: 12px;
  text-align: center;
}
@media screen and (min-width: 768px) {
  #content.useful section h3 {
    font-size: 30px;
    padding-bottom: 30px;
  }
}
#content.useful section .contents_body {
  margin-top: 24px;
}
@media screen and (min-width: 768px) {
  #content.useful section .contents_body {
    margin-top: 50px;
  }
}
#content.useful #category_list .contents_body {
  margin-top: 18px;
}
@media screen and (min-width: 768px) {
  #content.useful #category_list .contents_body {
    margin-top: 50px;
  }
}
#content.useful #category_list .contents_body ul {
  margin: 0 auto;
}
@media screen and (min-width: 768px) {
  #content.useful #category_list .contents_body ul {
    display: flex;
    flex-wrap: wrap;
    width: 830px;
  }
}
#content.useful #category_list .contents_body ul li {
  display: flex;
  font-size: 16px;
  margin-top: 18px;
}
#content.useful #category_list .contents_body ul li:first-child {
  margin-top: 0;
}
@media screen and (min-width: 768px) {
  #content.useful #category_list .contents_body ul li {
    width: 405px;
    margin: 36px 0 0 20px;
  }
  #content.useful #category_list .contents_body ul li:nth-child(odd) {
    margin-left: 0;
  }
  #content.useful #category_list .contents_body ul li:nth-child(-n+2) {
    margin-top: 0;
  }
}
#content.useful #category_list .contents_body ul li::before {
  content: "";
  display: block;
  width: 16px;
  height: 16px;
  background: url("../img/useful/pointer.png") center center/100% 100% no-repeat;
  flex-grow: 0;
  flex-shrink: 0;
  flex-basis: auto;
}
#content.useful #category_list .contents_body ul li a {
  margin-left: 12px;
}
@media screen and (min-width: 768px) {
  #content.useful .cards .contents_body {
    display: flex;
    flex-wrap: wrap;
  }
}
#content.useful .cards .contents_body article {
  border-radius: 12px;
  box-shadow: 0 0 6px 0 rgba(0, 0, 0, 0.1);
  overflow: hidden;
  margin-top: 20px;
}
#content.useful .cards .contents_body article:first-child {
  margin-top: 0;
}
@media screen and (min-width: 768px) {
  #content.useful .cards .contents_body article {
    width: 320px;
    margin-left: 20px;
  }
  #content.useful .cards .contents_body article:nth-child(-n+3) {
    margin-top: 0;
  }
  #content.useful .cards .contents_body article:nth-child(3n+1) {
    margin-left: 0;
  }
}
#content.useful .cards .contents_body article .visual {
  width: 100%;
  height: 200px;
  overflow: hidden;
}
#content.useful .cards .contents_body article .visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
#content.useful .cards .contents_body article .box {
  padding: 24px;
}
#content.useful .cards .contents_body article h4 {
  font-weight: bold;
  font-size: 20px;
  line-height: 2;
}
#content.useful .cards .contents_body article .entry_body {
  line-height: 2;
}
#content.useful .cards .contents_body article .download {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 40px;
  border-radius: 20px;
  border: 1px solid #ff7817;
  font-size: 16px;
  text-decoration: none;
  margin-top: 24px;
}
#content.useful.single .head {
  margin: -100px auto 40px;
  padding: 50px 50px 20px 50px;
  border-radius: 30px;
  position: relative;
  background: #fff;
  z-index: 2;
  max-width: 1000px;
  box-sizing: border-box;
}
@media screen and (min-width: 768px) {
  #content.useful.single .head {
    padding: 50px 85px 20px;
  }
}
#content.useful.single .head h2 {
  color: #ff7817;
  font-family: "Montserrat", sans-serif;
  font-size: 2.4rem;
  line-height: 1.6;
  position: relative;
  text-align: center;
  font-weight: 700;
  border-bottom: 6px dotted #ff7817;
  padding-bottom: 12px;
}
@media screen and (min-width: 768px) {
  #content.useful.single .head h2 {
    font-size: 3.4rem;
    padding-bottom: 24px;
  }
}
@media screen and (min-width: 768px) {
  #content.useful.single .entry_single_wrap {
    display: flex;
    justify-content: space-between;
  }
}
@media screen and (min-width: 768px) {
  #content.useful.single .entry_body {
    width: 575px;
  }
}
#content.useful.single .entry_body .visual {
  box-shadow: 0 0 12px 0 rgba(0, 0, 0, 0.2);
  border-radius: 12px;
}
#content.useful.single .entry_content {
  margin-top: 24px;
}
@media screen and (min-width: 768px) {
  #content.useful.single .entry_content {
    margin-top: 60px;
    font-size: 16px;
    line-height: 2;
  }
}
#content.useful.single .entry_content h3,
#content.useful.single .entry_content h4 {
  margin-top: 24px;
}
@media screen and (min-width: 768px) {
  #content.useful.single .entry_content h3,
#content.useful.single .entry_content h4 {
    margin-top: 30px;
  }
}
#content.useful.single .entry_content h3:first-child,
#content.useful.single .entry_content h4:first-child {
  margin-top: 0;
}
#content.useful.single .entry_content h3 {
  font-size: 22px;
}
@media screen and (min-width: 768px) {
  #content.useful.single .entry_content h3 {
    font-size: 28px;
    padding-bottom: 8px;
  }
}
#content.useful.single .entry_content h4 {
  color: #ff7817;
  font-size: 18px;
}
@media screen and (min-width: 768px) {
  #content.useful.single .entry_content h4 {
    font-size: 24px;
  }
}
#content.useful.single .entry_content p {
  margin-top: 12px;
}
@media screen and (min-width: 768px) {
  #content.useful.single .entry_content p {
    margin-top: 24px;
  }
}
#content.useful.single .entry_content p:first-child {
  margin-top: 0;
}
#content.useful.single .entry_content ul,
#content.useful.single .entry_content ol {
  margin-top: 18px;
}
@media screen and (min-width: 768px) {
  #content.useful.single .entry_content ul,
#content.useful.single .entry_content ol {
    margin-top: 30px;
  }
}
@media screen and (min-width: 768px) {
  #content.useful.single .side {
    width: 320px;
  }
}

.contact_area {
  margin-top: 72px;
}
@media screen and (min-width: 768px) {
  .contact_area {
    margin-top: 140px;
  }
}