:root {
  --black: 51,51,51;
  --red: 238,0,59;
  --dark_red: 207,28,85;
  --wine_red: 163,48,87;
  --main: 233,83,131;
  --accent: 227,55,129;
  --note: 102,102,102;
  --bg: 243,243,243;
  --gray: 153,153,153;
  --dark_gray: 167,167,167;
  --border: 210,211,212;
  --light_pink: 252,229,237;
  --beige: 248,244,241;
  --green: 92,198,172;
  --blue: 16,120,237;
  --purple: 189,104,200;
  --light_purple: 242,228,243;
  --contents_width: 1100px;
  --body_padding_side: 60px;
  --contents_width_with_padding: 1160px;
  --sidebar_width: 250px;
  --hover_opacity: .7;
}

/* .l-sub-img
================================================ */
.l-sub-img.has-bg {
  background-image: url(../img/mv01_sp.jpg);
}
@media all and (min-width: 768px) {
  .l-sub-img.has-bg {
    background-image: url(../img/mv01_pc.jpg), linear-gradient(90deg, #f3f4ff 0%, #dee1fe 100%);
  }
}
@media all and (max-width: 767px) {
  .l-sub-img__txt {
    font-size: 1.9rem !important;
  }
}

/* .skin_dullskin-case
================================================ */
.skin_dullskin-case__inner {
  padding-top: 15px;
  padding-bottom: 15px;
}
@media all and (min-width: 768px) {
  .skin_dullskin-case__inner {
    padding-top: 50px;
    padding-bottom: 50px;
  }
  .skin_dullskin-case .c-case01:has(div.c-case01__img) {
    width: 700px;
  }
}

/* .skin_dullskin-cause
================================================ */
.skin_dullskin-cause__item {
  background: #f8f4f1;
  border: 1px solid #eeeeee;
  border-radius: 10px;
  padding: 15px;
}
@media all and (max-width: 767px) {
  .skin_dullskin-cause__item:nth-child(n+2) {
    margin-top: 20px;
  }
}
.skin_dullskin-cause__head {
  display: flex;
  align-items: center;
  border-bottom: 1px solid rgb(var(--wine_red));
  padding-bottom: 8px;
  margin-bottom: 10px;
}
.skin_dullskin-cause__type {
  border-radius: 3rem;
  margin-right: 10px;
}
.skin_dullskin-cause__type.is-brown {
  background: #8b5a2c;
}
.skin_dullskin-cause__type.is-blue {
  background: #5b7fa6;
}
.skin_dullskin-cause__type.is-gray {
  background: #8a8a8a;
}
.skin_dullskin-cause__type.is-yellow {
  background: #d8b94a;
}
.skin_dullskin-cause__label {
  color: #fff;
  font-weight: bold;
  line-height: 1.1;
  display: block;
  border-radius: 5rem;
  padding: 5px 10px;
}
.skin_dullskin-cause__title {
  color: rgb(var(--wine_red));
  font-size: 2rem;
}
@media all and (min-width: 768px) {
  .skin_dullskin-cause {
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
  }
  .skin_dullskin-cause__item {
    width: 313px;
    padding: 15px;
    box-sizing: border-box;
  }
  .skin_dullskin-cause__item:nth-child(n+4) {
    margin-top: 20px;
  }
  .skin_dullskin-cause__item:nth-child(3n+2) {
    margin-left: 20px;
    margin-right: 20px;
  }
}