/* ///// gas decolation ///// */
@keyframes rotateAnimation {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

/* ///// section ///// */
/* background */
.section_bg {
  background: #F2F2F2;
}

/* title */
.section-title {
  border-left: rgb(218, 31, 55) 5px solid;
  padding: 0 0 0 15px;
  font-size: 1.6rem;
  font-weight: bold;
  line-height: 1;
}

.section-subtitle {
  margin: 20px 0 0 0;
  font-size: 1.4rem;
  line-height: 1;
}

/* ///// text ///// */
.u-attention {
  margin: 30px 0 0 0;
  font-size: 1.2rem;
}

/* ///// Partition ///// */
.u-partition {
  background: no-repeat center center;
  background-size: 100% 60px;
  width: 100%;
  height: 60px;
  display: block;
}

.ltr {
  background-image: url(../img/bg_part_01.png);
  margin: 30px 0 0 0;
}

.rtl {
  background-image: url(../img/bg_part_02.png);
}

.u-btn-trigger,
.u-btn-bg {
  display: none;
}

.u-btn-trigger.active {
  display: block;
}


/* smart phone */
@media (max-width: 599px) {

  /* SP MENU BUTTOM */
  /*- MENU BUTTOM ///////// */
  .u-btn-trigger {
    position: fixed;
    width: 20px;
    height: 22px;
    cursor: pointer;
    top: 63px;
    right: 35px;
    z-index: 10;
  }

  .u-btn-bg {
    background: rgba(255, 255, 255, 0.8);
    width: 40px;
    height: 42px;
    position: fixed;
    top: 53px;
    right: 25px;
    z-index: 9;
    display: block;
  }

  .u-btn-trigger span {
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: #000;
  }

  .u-btn-trigger,
  .u-btn-trigger span {
    display: inline-block;
    transition: all .5s;
    box-sizing: border-box;
  }

  .u-btn-trigger span:nth-of-type(1) {
    top: 0;
  }

  .u-btn-trigger span:nth-of-type(2) {
    top: 10px;
  }

  .u-btn-trigger span:nth-of-type(3) {
    bottom: 0;
  }

  #btn span:nth-of-type(1) {
    -webkit-animation: btn-bar01 .5s forwards;
    animation: btn-bar01 .5s forwards;
  }

  @-webkit-keyframes btn-bar01 {
    0% {
      -webkit-transform: translateY(10px) rotate(45deg);
    }

    50% {
      -webkit-transform: translateY(10px) rotate(0);
    }

    100% {
      -webkit-transform: translateY(0) rotate(0);
    }
  }

  @keyframes btn-bar01 {
    0% {
      transform: translateY(10px) rotate(45deg);
    }

    50% {
      transform: translateY(10px) rotate(0);
    }

    100% {
      transform: translateY(0) rotate(0);
    }
  }

  #btn span:nth-of-type(2) {
    transition: all .25s .25s;
    opacity: 1;
  }

  #btn span:nth-of-type(3) {
    -webkit-animation: btn-bar03 .5s forwards;
    animation: btn-bar03 .5s forwards;
  }

  @-webkit-keyframes btn-bar03 {
    0% {
      -webkit-transform: translateY(-10px) rotate(-45deg);
    }

    50% {
      -webkit-transform: translateY(-10px) rotate(0);
    }

    100% {
      -webkit-transform: translateY(0) rotate(0);
    }
  }

  @keyframes btn-bar03 {
    0% {
      transform: translateY(-10px) rotate(-45deg);
    }

    50% {
      transform: translateY(-10px) rotate(0);
    }

    100% {
      transform: translateY(0) rotate(0);
    }
  }

  #btn.active span:nth-of-type(1) {
    -webkit-animation: active-btn-bar01 .5s forwards;
    animation: active-btn-bar01 .5s forwards;
  }

  @-webkit-keyframes active-btn-bar01 {
    0% {
      -webkit-transform: translateY(0) rotate(0);
    }

    50% {
      -webkit-transform: translateY(10px) rotate(0);
    }

    100% {
      -webkit-transform: translateY(10px) rotate(45deg);
    }
  }

  @keyframes active-btn-bar01 {
    0% {
      transform: translateY(0) rotate(0);
    }

    50% {
      transform: translateY(10px) rotate(0);
    }

    100% {
      transform: translateY(10px) rotate(45deg);
    }
  }

  #btn.active span:nth-of-type(2) {
    opacity: 0;
  }

  #btn.active span:nth-of-type(3) {
    -webkit-animation: active-btn-bar03 .5s forwards;
    animation: active-btn-bar03 .5s forwards;
  }

  @-webkit-keyframes active-btn-bar03 {
    0% {
      -webkit-transform: translateY(0) rotate(0);
    }

    50% {
      -webkit-transform: translateY(-10px) rotate(0);
    }

    100% {
      -webkit-transform: translateY(-10px) rotate(-45deg);
    }
  }

  @keyframes active-btn-bar03 {
    0% {
      transform: translateY(0) rotate(0);
    }

    50% {
      transform: translateY(-10px) rotate(0);
    }

    100% {
      transform: translateY(-10px) rotate(-45deg);
    }
  }