.c_brand .c_main {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/*
.c_brand_bg {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    background: url(../images/brand/brand_1_pic.webp) center top no-repeat;
    background-size: cover;
    filter: grayscale(100%) contrast(20%) brightness(180%) blur(14px) ;
}
*/
.brand_main {
  position: relative;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  padding-top: 110px;
}

.brand_main picture,
.brand_main img {
  display: block;
  width: 100%;
}

.brand_main span img {
  mix-blend-mode: multiply;
}

.brand_pic {
  position: relative;
  width: 49.79%;
  aspect-ratio: 956 / 743;
  background-color: #DCDAD7;
  overflow: hidden;
  z-index: 1;
}

.brand_pic_text {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 98%;
  color: #fff;
  font-family: "Century Gothic", "Poppins", "M PLUS 1", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "BIZ UDPGothic", sans-serif;
  font-weight: 400;
  font-optical-sizing: auto;
  font-style: normal;
  letter-spacing: 1px;
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
  justify-content: flex-end;
  text-align: center;
  text-shadow: 0 0 5px rgba(0, 0, 0, 0.9);
  z-index: 1;
}

.brand_pic_pretitle {
  font-size: min(1.2195121951vw, 9px);
}

.brand_pic_title {
  margin-top: 0.2em;
  font-size: min(2.0325203252vw, 15px);
  letter-spacing: 2px;
}

.brand_pic_posttitle {
  margin-top: 0.5em;
  font-size: min(1.2195121951vw, 9px);
}

.brand_pic_copyright {
  margin-top: 1em;
  font-size: min(0.8130081301vw, 6px);
}

.brand_list {
  position: relative;
  width: 50.21%;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1;
}

.brand_list ul {
  position: relative;
  width: 85%;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}

.brand_list li {
  position: relative;
  width: 24.73%;
  padding: 1%;
}

.brand_list li > span,
.brand_list li > a {
  position: relative;
  display: block;
}

.brand_list li > a img {
  display: block;
  position: relative;
  transition: fitler 0.4s linear;
  filter: grayscale(100%);
  z-index: 3;
}

.brand_list li > a:before {
  content: "";
  width: 80%;
  height: 80%;
  display: block;
  position: absolute;
  left: 10%;
  top: 10%;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.2);
}

span.cursor {
  position: absolute;
  display: block;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  transition-duration: 0.2s;
  opacity: 0;
}

span.cursor:before {
  content: "";
  display: block;
  z-index: -1;
  position: absolute;
  left: -10%;
  top: -10%;
  width: 120%;
  height: 120%;
  background: radial-gradient(circle closest-side at center, rgb(255, 255, 255), rgba(255, 255, 255, 0) 100%);
  background-size: 100% 100%;
  opacity: 0;
  border-radius: 50%;
  animation: a_span_cursor_opacity 0.2s linear forwards;
  pointer-events: none;
}

@keyframes a_span_cursor_opacity {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
span.cursor_o {
  position: absolute;
  display: block;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  mask-image: url(../images/brand/cursor_o.svg);
  mask-size: cover;
  z-index: 2;
  animation: a_brand_cursor_leftturn 15s linear infinite;
}

span.cursor_o:before {
  content: "";
  position: absolute;
  display: block;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: url(../images/brand/cursor_grad.png) center center no-repeat;
  background-size: 100% 100%;
  animation: a_brand_cursor_rightturn 15s linear infinite;
}

span.cursor_i {
  position: absolute;
  display: block;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  mask-image: url(../images/brand/cursor_i.svg);
  mask-size: cover;
  z-index: 2;
  animation: a_brand_cursor_rightturn 15s linear infinite;
}

span.cursor_i:before {
  content: "";
  position: absolute;
  display: block;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: url(../images/brand/cursor_grad.png) center center no-repeat;
  background-size: 100% 100%;
  animation: a_brand_cursor_leftturn 15s linear infinite;
}

.brand_list li > a.clicked picture,
.brand_list li > a.clicked img,
.brand_list li > a:hover img {
  filter: grayscale(0%);
}

.brand_list li > a.clicked span.cursor,
.brand_list li > a:hover span.cursor {
  opacity: 1;
}

@keyframes a_brand_cursor_leftturn {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(1turn);
  }
}
@keyframes a_brand_cursor_rightturn {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(-1turn);
  }
}
/*
@include media-max($bp-md) {
    .brand_main {
        padding-top: 18%;
        flex-direction: column;
    }
    .brand_pic {
        width: 80%;
    }
    .brand_list {
        margin-top: 10%;
        width: 100%;
    }
    .brand_list li {
        width: 30%;
    }
}
*/
@media screen and (max-width: 767px) {
  .brand_main {
    padding-top: 18%;
    flex-direction: column;
  }
  .brand_pic {
    width: 80%;
  }
  .brand_list {
    margin-top: 10%;
    width: 100%;
  }
  .brand_list li {
    width: 30%;
  }
  .brand_pic_pretitle {
    font-size: min(1.3024602026vw, 9px);
  }
  .brand_pic_title {
    font-size: min(2.1707670043vw, 15px);
  }
  .brand_pic_posttitle {
    font-size: min(1.3024602026vw, 9px);
  }
  .brand_pic_copyright {
    font-size: min(0.8683068017vw, 6px);
  }
}