:root {
  --black: 51,51,51;
  --red: 238,0,59;
  --dark_red: 207,28,85;
  --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-container
================================================ */
#stiff-neck .l-container {
  padding-top: 0;
}

/* .stiff-neck-mainimg
================================================ */
.stiff-neck-mainimg {
  background: #f4edff;
}

/* .stiff-neck-info
================================================ */
.stiff-neck-info {
  box-shadow: inset 0 0 0px 2px #987c4c, inset 0 0 0px 4px #fff, inset 0 0 0px 5px #c6af7b;
  padding: 15px;
}
.stiff-neck-info__head {
  color: #aa076e;
  font-size: 1.8rem;
  font-weight: bold;
  line-height: 1.6;
  text-align: center;
  border-bottom: dotted 1px #aa076e;
  padding-bottom: 5px;
  margin-bottom: 15px;
}
@media all and (min-width: 768px) {
  .stiff-neck-info {
    box-shadow: inset 0 0 0px 3px #987c4c, inset 0 0 0px 7px #fff, inset 0 0 0px 10px #c6af7b;
    padding: 40px;
  }
  .stiff-neck-info__head {
    font-size: 3rem;
    border-bottom: dotted 2px #aa076e;
    padding-bottom: 15px;
    margin-bottom: 20px;
  }
}

/* .stiff-neck-effect-cards
================================================ */
.stiff-neck-effect-cards {
  background: url(/stiff-neck/img/bg_effect01.jpg) center top no-repeat;
  background-size: contain;
  padding: 15px 15px 0;
}
.stiff-neck-effect-cards__body {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.stiff-neck-effect-cards__item {
  line-height: 1.6;
  text-align: center;
}
.stiff-neck-effect-cards__item.has-arrow01 {
  background: url(/stiff-neck/img/img_arw01.png) center top no-repeat;
  background-size: auto 20px;
  padding-top: 20px;
}
.stiff-neck-effect-cards__item.has-arrow02 {
  background: url(/stiff-neck/img/img_arw02.png) center top no-repeat;
  background-size: auto 20px;
  padding-top: 20px;
}
@media all and (max-width: 767px) {
  .stiff-neck-effect-cards {
    margin-right: -15px;
    margin-left: -15px;
  }
}
@media all and (min-width: 768px) {
  .stiff-neck-effect-cards {
    padding: 60px 60px 0;
  }
  .stiff-neck-effect-cards__body {
    gap: 10px 60px;
  }
  .stiff-neck-effect-cards__item {
    font-size: 2.4rem;
  }
  .stiff-neck-effect-cards__item.has-arrow01 {
    background-size: auto;
    padding-top: 50px;
  }
  .stiff-neck-effect-cards__item.has-arrow02 {
    background-size: auto;
    padding-top: 50px;
  }
}