.footer {
  padding: 0 40px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  max-width: 1282px;
  padding: 40px 0;
  margin: auto;
}
.footer-logo {
  display: flex;
  margin: 0 0 12px;
}
.footer-nav-li {
  display: flex;
  align-items: center;
}
.footer-nav-item + .footer-nav-item {
  margin: 0 0 0 16px;
}
.footer-nav-item > a {
  display: inline-block;
  font-size: 11px;
}
.footer-nav-item > a span {
  background: linear-gradient(#282828, #282828) 0 100%/0 1px no-repeat;
  transition: background 0.3s;
}
.footer-sns-li li::before {
  display: none;
  position: absolute;
  margin-top: -21px;
  font-size: 10px;
  color: #999;
  line-height: 1.8;
  word-break: keep-all;
  border-radius: 2px;
  background: #fff;
  box-shadow: 0 0 10px rgba(0, 0, 0, .1);
  padding: 0 4px;
  transform: translateX(-50%);
  transition: .3s;
  white-space: nowrap;
}
.footer-sns-li li:nth-of-type(1)::before {
  content: "X（Twitter）";
}
.footer-sns-li li:nth-of-type(2)::before {
  content: "Facebook";
}
.footer-sns-li li:nth-of-type(3)::before {
  content: "Instagram";
}
.footer-sns-li li:nth-of-type(4)::before {
  content: "Youtube";
}
.footer-sns-li li:nth-of-type(5)::before {
  content: "Line";
}
.footer-sns-li li.mouse-in::before {
  display: inline-block;
  margin-left: 14px;
}
.footer-sns-li {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 16px 0 0;
}
.footer-sns-item a {
  display: inline-block;
}
.copyright small {
  font-size: 10px;
}

@media screen and (min-width: 768px) {
  .footer-nav-item > a:hover span {
    background-size: 100% 1px;
  }
  .footer-sns-item a:hover {
    opacity: 0.7;
  }
}

@media screen and (max-width: 767px) {
  .footer {
    padding: 0 24px;
  }
  .footer-inner {
    display: block;
    padding: 24px 0;
  }
  .footer-logo {
    margin: 0 0 8px;
  }
  .footer-sns-li {
    margin: 12px 0 0;
  }
}