@charset "UTF-8";
.mb20 {
  margin-bottom: 20px;
}

.mb40 {
  margin-bottom: 40px;
}

.mb60 {
  margin-bottom: 60px;
}

.mb80 {
  margin-bottom: 80px;
}

/* Slider */
.slick-slider {
  position: relative;
  display: block;
  box-sizing: border-box;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
  touch-action: pan-y;
  -webkit-tap-highlight-color: transparent;
}

.slick-list {
  position: relative;
  overflow: hidden;
  display: block;
  margin: 0;
  padding: 0;
}
.slick-list:focus {
  outline: none;
}
.slick-list.dragging {
  cursor: pointer;
  cursor: hand;
}

.slick-slider .slick-track,
.slick-slider .slick-list {
  transform: translate3d(0, 0, 0);
}

.slick-track {
  position: relative;
  left: 0;
  top: 0;
  display: block;
  margin-left: auto;
  margin-right: auto;
}
.slick-track:before, .slick-track:after {
  content: "";
  display: table;
}
.slick-track:after {
  clear: both;
}
.slick-loading .slick-track {
  visibility: hidden;
}

.slick-slide {
  float: left;
  height: 100%;
  min-height: 1px;
  display: none;
}
[dir=rtl] .slick-slide {
  float: right;
}
.slick-slide img {
  display: block;
}
.slick-slide.slick-loading img {
  display: none;
}
.slick-slide.dragging img {
  pointer-events: none;
}
.slick-initialized .slick-slide {
  display: block;
}
.slick-loading .slick-slide {
  visibility: hidden;
}
.slick-vertical .slick-slide {
  display: block;
  height: auto;
  border: 1px solid transparent;
}

.slick-arrow.slick-hidden {
  display: none;
}

/* Slider */
.slick-loading .slick-list {
  background: #fff url("../images-bg/ajax-loader.gif") center center no-repeat;
}

/* Icons */
@font-face {
  font-family: "slick";
  src: url("../fonts/slick.eot");
  src: url("../fonts/slick.eot?#iefix") format("embedded-opentype"), url("../fonts/slick.woff") format("woff"), url("../fonts/slick.ttf") format("truetype"), url("../fonts/slick.svg#slick") format("svg");
  font-weight: normal;
  font-style: normal;
}
/* Arrows */
.slick-prev,
.slick-next {
  position: absolute;
  display: block;
  height: 20px;
  width: 20px;
  line-height: 0px;
  font-size: 0px;
  cursor: pointer;
  background: transparent;
  color: transparent;
  top: 50%;
  transform: translate(0, -50%);
  padding: 0;
  border: none;
  outline: none;
}
.slick-prev:hover, .slick-prev:focus,
.slick-next:hover,
.slick-next:focus {
  outline: none;
  background: transparent;
  color: transparent;
}
.slick-prev:hover:before, .slick-prev:focus:before,
.slick-next:hover:before,
.slick-next:focus:before {
  opacity: 1;
}
.slick-prev.slick-disabled:before,
.slick-next.slick-disabled:before {
  opacity: 0.25;
}
.slick-prev:before,
.slick-next:before {
  font-family: "slick";
  font-size: 20px;
  line-height: 1;
  color: white;
  opacity: 0.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.slick-prev {
  left: -25px;
}
[dir=rtl] .slick-prev {
  left: auto;
  right: -25px;
}
.slick-prev:before {
  content: "←";
}
[dir=rtl] .slick-prev:before {
  content: "→";
}

.slick-next {
  right: -25px;
}
[dir=rtl] .slick-next {
  left: -25px;
  right: auto;
}
.slick-next:before {
  content: "→";
}
[dir=rtl] .slick-next:before {
  content: "←";
}

/* Dots */
.slick-dotted.slick-slider {
  margin-bottom: 30px;
}

.slick-dots {
  position: absolute;
  bottom: -25px;
  list-style: none;
  display: block;
  text-align: center;
  padding: 0;
  margin: 0;
  width: 100%;
}
.slick-dots li {
  position: relative;
  display: inline-block;
  height: 20px;
  width: 20px;
  margin: 0 5px;
  padding: 0;
  cursor: pointer;
}
.slick-dots li button {
  border: 0;
  background: transparent;
  display: block;
  height: 20px;
  width: 20px;
  outline: none;
  line-height: 0px;
  font-size: 0px;
  color: transparent;
  padding: 5px;
  cursor: pointer;
}
.slick-dots li button:hover, .slick-dots li button:focus {
  outline: none;
}
.slick-dots li button:hover:before, .slick-dots li button:focus:before {
  opacity: 1;
}
.slick-dots li button:before {
  position: absolute;
  top: 0;
  left: 0;
  content: "•";
  width: 20px;
  height: 20px;
  font-family: "slick";
  font-size: 6px;
  line-height: 20px;
  text-align: center;
  color: black;
  opacity: 0.25;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
.slick-dots li.slick-active button:before {
  color: black;
  opacity: 0.75;
}

.not-selectable {
  -moz-user-select: none;
  -webkit-user-select: none;
  user-select: none;
}

.carousel {
  position: relative;
  box-sizing: border-box;
}

.carousel *, .carousel *:before, .carousel *:after {
  box-sizing: inherit;
}

.carousel__viewport {
  position: relative;
  overflow: hidden;
  width: 100%;
  height: 100%;
}

.carousel__track {
  display: flex;
}

.carousel__slide {
  flex: 0 0 auto;
  width: var(--carousel-slide-width, 60%);
  max-width: 100%;
  padding: 1rem;
  position: relative;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-y;
}

.carousel.has-dots {
  margin-bottom: calc(0.5rem + 22px);
}

.carousel__dots {
  margin: 0 auto;
  padding: 0;
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  list-style: none;
  -webkit-user-select: none;
     -moz-user-select: none;
          user-select: none;
}

.carousel__dots .carousel__dot {
  margin: 0;
  padding: 0;
  display: block;
  position: relative;
  width: 22px;
  height: 22px;
  cursor: pointer;
}

.carousel__dots .carousel__dot:after {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: currentColor;
  opacity: 0.25;
  transition: opacity 0.15s ease-in-out;
}

.carousel__dots .carousel__dot.is-selected:after {
  opacity: 1;
}

.carousel__button {
  width: var(--carousel-button-width, 48px);
  height: var(--carousel-button-height, 48px);
  padding: 0;
  border: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  pointer-events: all;
  cursor: pointer;
  color: var(--carousel-button-color, currentColor);
  background: var(--carousel-button-bg, transparent);
  border-radius: var(--carousel-button-border-radius, 50%);
  box-shadow: var(--carousel-button-shadow, none);
}

.carousel__button.is-prev, .carousel__button.is-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

.carousel__button.is-prev {
  left: 10px;
}

.carousel__button.is-next {
  right: 10px;
}

.carousel__button[disabled] {
  cursor: default;
  opacity: 0.3;
}

.carousel__button svg {
  width: var(--carousel-button-svg-width, 24px);
  height: var(--carousel-button-svg-height, 24px);
  fill: none;
  stroke: currentColor;
  stroke-width: var(--carousel-button-svg-stroke-width, 1.5);
  stroke-linejoin: bevel;
  stroke-linecap: round;
  filter: var(--carousel-button-svg-filter, none);
  pointer-events: none;
}

body.compensate-for-scrollbar {
  overflow: hidden !important;
  touch-action: none;
}

.fancybox__container {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  margin: 0;
  padding: env(safe-area-inset-top, 0px) env(safe-area-inset-right, 0px) env(safe-area-inset-bottom, 0px) env(safe-area-inset-left, 0px);
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  color: var(--fancybox-color, #fff);
  -webkit-tap-highlight-color: transparent;
  overflow: hidden;
  z-index: 1050;
  outline: none;
  transform-origin: top left;
  --carousel-button-width: 48px;
  --carousel-button-height: 48px;
  --carousel-button-svg-width: 24px;
  --carousel-button-svg-height: 24px;
  --carousel-button-svg-stroke-width: 2.5;
  --carousel-button-svg-filter: drop-shadow(1px 1px 1px rgba(0, 0, 0, 0.4));
}

.fancybox__container *, .fancybox__container *::before, .fancybox__container *::after {
  box-sizing: inherit;
}

.fancybox__container :focus {
  outline: thin dotted;
}

body.is-using-mouse .fancybox__container :focus {
  outline: none;
}

@media all and (min-width: 1024px) {
  .fancybox__container {
    --carousel-button-svg-width:27px;
    --carousel-button-svg-height:27px;
  }
}
.fancybox__backdrop {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: -1;
  background: var(--fancybox-bg, rgba(24, 24, 27, 0.92));
}

.fancybox__carousel {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
  height: 100%;
  z-index: 10;
}

.fancybox__carousel.has-dots {
  margin-bottom: calc(0.5rem + 22px);
}

.fancybox__viewport {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: visible;
  cursor: default;
}

.fancybox__track {
  display: flex;
  height: 100%;
}

.fancybox__slide {
  flex: 0 0 auto;
  width: 100%;
  max-width: 100%;
  margin: 0;
  padding: 64px;
  position: relative;
  overscroll-behavior: contain;
  display: flex;
  flex-direction: column;
  outline: 0;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  --carousel-button-width: 36px;
  --carousel-button-height: 36px;
  --carousel-button-svg-width: 22px;
  --carousel-button-svg-height: 22px;
}

.fancybox__slide::before, .fancybox__slide::after {
  content: "";
  flex: 0 0 0;
  margin: auto;
}

@media all and (min-width: 1024px) {
  .fancybox__slide {
    padding: 64px 100px;
  }
}
.fancybox__content {
  margin: 0 env(safe-area-inset-right, 0px) 0 env(safe-area-inset-left, 0px);
  padding: 36px;
  color: var(--fancybox-content-color, #374151);
  background: var(--fancybox-content-bg, #fff);
  position: relative;
  align-self: center;
  display: flex;
  flex-direction: column;
  z-index: 20;
}

.fancybox__caption {
  align-self: center;
  max-width: 100%;
  margin: 0;
  padding: 1rem 0 0 0;
  line-height: 1.375;
  color: var(--fancybox-color, currentColor);
  visibility: visible;
  cursor: auto;
  flex-shrink: 0;
}

.is-loading .fancybox__caption {
  visibility: hidden;
}

.fancybox__container > .carousel__dots {
  top: 100%;
  color: var(--fancybox-color, #fff);
}

.fancybox__nav .carousel__button {
  z-index: 40;
}

.fancybox__nav .carousel__button.is-next {
  right: 8px;
}

@media all and (min-width: 1024px) {
  .fancybox__nav .carousel__button.is-next {
    right: 40px;
  }
}
.fancybox__nav .carousel__button.is-prev {
  left: 8px;
}

@media all and (min-width: 1024px) {
  .fancybox__nav .carousel__button.is-prev {
    left: 40px;
  }
}
.carousel__button.is-close {
  position: absolute;
  top: 8px;
  right: 8px;
  top: calc(env(safe-area-inset-top, 0px) + 8px);
  right: calc(env(safe-area-inset-right, 0px) + 8px);
  z-index: 40;
}

@media all and (min-width: 1024px) {
  .carousel__button.is-close {
    right: 40px;
  }
}
.fancybox__content > .carousel__button.is-close {
  position: absolute;
  top: -36px;
  right: 0;
  color: var(--fancybox-color, #fff);
}

.fancybox__spinner {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 50px;
  height: 50px;
  cursor: pointer;
  z-index: 1053;
  color: var(--fancybox-color, currentColor);
}

.fancybox__spinner svg {
  animation: fancybox-rotate 2s linear infinite;
  transform-origin: center center;
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  margin: auto;
  width: 100%;
  height: 100%;
}

.fancybox__spinner svg circle {
  fill: none;
  stroke-width: 2.5;
  stroke-miterlimit: 10;
  stroke-dasharray: 1, 200;
  stroke-dashoffset: 0;
  animation: fancybox-dash 1.5s ease-in-out infinite;
  stroke-linecap: round;
  stroke: currentColor;
}

@keyframes fancybox-rotate {
  100% {
    transform: rotate(360deg);
  }
}
@keyframes fancybox-dash {
  0% {
    stroke-dasharray: 1, 200;
    stroke-dashoffset: 0;
  }
  50% {
    stroke-dasharray: 89, 200;
    stroke-dashoffset: -35px;
  }
  100% {
    stroke-dasharray: 89, 200;
    stroke-dashoffset: -124px;
  }
}
.fancybox__container.is-animated[aria-hidden=false] .fancybox__backdrop, .fancybox__container.is-animated[aria-hidden=false] .fancybox__caption, .fancybox__container.is-animated[aria-hidden=false] .fancybox__nav, .fancybox__container.is-animated[aria-hidden=false] .carousel__dots, .fancybox__container.is-animated[aria-hidden=false] .carousel__button.is-close {
  transition: opacity var(--fancybox-ts, 0.25s) ease;
  opacity: var(--fancybox-opacity, 1);
}

.fancybox__container.is-animated[aria-hidden=true] .fancybox__backdrop, .fancybox__container.is-animated[aria-hidden=true] .fancybox__caption, .fancybox__container.is-animated[aria-hidden=true] .fancybox__nav, .fancybox__container.is-animated[aria-hidden=true] .carousel__dots, .fancybox__container.is-animated[aria-hidden=true] .carousel__button.is-close {
  transition: opacity 0.2s ease;
  opacity: 0;
}

.fancybox-fadeIn {
  animation: 0.2s ease both fancybox-fadeIn;
}

.fancybox-fadeOut {
  animation: 0.2s ease both fancybox-fadeOut;
}

.fancybox-zoomInUp {
  animation: 0.2s ease both fancybox-zoomInUp;
}

.fancybox-zoomOutDown {
  animation: 0.2s ease both fancybox-zoomOutDown;
}

.fancybox-throwOutUp {
  animation: 0.2s ease both fancybox-throwOutUp;
}

.fancybox-throwOutDown {
  animation: 0.2s ease both fancybox-throwOutDown;
}

@keyframes fancybox-fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
@keyframes fancybox-fadeOut {
  to {
    opacity: 0;
  }
}
@keyframes fancybox-zoomInUp {
  from {
    transform: scale(0.97) translate3d(0, 16px, 0);
    opacity: 0;
  }
  to {
    transform: scale(1) translate3d(0, 0, 0);
    opacity: 1;
  }
}
@keyframes fancybox-zoomOutDown {
  to {
    transform: scale(0.97) translate3d(0, 16px, 0);
    opacity: 0;
  }
}
@keyframes fancybox-throwOutUp {
  20% {
    opacity: 0.5;
  }
  to {
    transform: translate3d(0, -30%, 0);
    opacity: 0;
  }
}
@keyframes fancybox-throwOutDown {
  20% {
    opacity: 0.5;
  }
  to {
    transform: translate3d(0, 30%, 0);
    opacity: 0;
  }
}
.fancybox__carousel .carousel__slide {
  scrollbar-width: thin;
  scrollbar-color: #ccc rgba(255, 255, 255, 0.1);
}

.fancybox__carousel .carousel__slide::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

.fancybox__carousel .carousel__slide::-webkit-scrollbar-track {
  background-color: rgba(255, 255, 255, 0.1);
}

.fancybox__carousel .carousel__slide::-webkit-scrollbar-thumb {
  background-color: #ccc;
  border-radius: 2px;
  box-shadow: inset 0 0 4px rgba(0, 0, 0, 0.2);
}

.fancybox__carousel .is-draggable {
  cursor: move;
  cursor: grab;
}

.fancybox__carousel .is-dragging {
  cursor: move;
  cursor: grabbing;
}

.fancybox__carousel .carousel__slide:not(.has-image) .fancybox__content {
  cursor: auto;
}

.fancybox__carousel .carousel__slide.can-zoom_in .fancybox__content {
  cursor: zoom-in;
}

.fancybox__carousel .carousel__slide.can-zoom_out .fancybox__content {
  cursor: zoom-out;
}

.fancybox__image {
  background: transparent;
  -webkit-user-select: none;
     -moz-user-select: none;
          user-select: none;
}

.has-image .fancybox__content {
  padding: 0;
  background: transparent;
}

.is-closing .has-image .fancybox__content {
  overflow: visible;
}

.has-image[data-image-fit=contain] {
  overflow: visible;
  touch-action: none;
}

.has-image[data-image-fit=contain] .fancybox__content {
  min-height: 1px;
}

.has-image[data-image-fit=contain] .fancybox__image {
  max-width: 100%;
  min-height: 1px;
  -o-object-fit: contain;
     object-fit: contain;
  background: transparent;
}

.has-image[data-image-fit=contain-w] {
  overflow-x: hidden;
  overflow-y: auto;
}

.has-image[data-image-fit=contain-w] .fancybox__content {
  min-height: auto;
}

.has-image[data-image-fit=contain-w] .fancybox__image {
  max-width: 100%;
  height: auto;
}

.has-image[data-image-fit=cover] {
  overflow: visible;
  touch-action: none;
}

.has-image[data-image-fit=cover] .fancybox__content {
  min-height: 1px;
  width: 100%;
  height: 100%;
}

.has-image[data-image-fit=cover] .fancybox__image {
  width: 100%;
  height: 100%;
  min-height: 1px;
  -o-object-fit: cover;
     object-fit: cover;
}

.fancybox__carousel .fancybox__slide.has-iframe .fancybox__content, .fancybox__carousel .fancybox__slide.has-map .fancybox__content, .fancybox__carousel .fancybox__slide.has-pdf .fancybox__content, .fancybox__carousel .fancybox__slide.has-video .fancybox__content, .fancybox__carousel .fancybox__slide.has-html5video .fancybox__content {
  flex-shrink: 1;
  min-height: 1px;
  overflow: visible;
}

.fancybox__carousel .fancybox__slide.has-iframe .fancybox__content, .fancybox__carousel .fancybox__slide.has-map .fancybox__content, .fancybox__carousel .fancybox__slide.has-pdf .fancybox__content {
  width: 100%;
  height: 80%;
}

.fancybox__carousel .fancybox__slide.has-video .fancybox__content, .fancybox__carousel .fancybox__slide.has-html5video .fancybox__content {
  width: 960px;
  height: 540px;
  max-width: 100%;
  max-height: 100%;
}

.fancybox__carousel .fancybox__slide.has-map .fancybox__content, .fancybox__carousel .fancybox__slide.has-pdf .fancybox__content, .fancybox__carousel .fancybox__slide.has-video .fancybox__content, .fancybox__carousel .fancybox__slide.has-html5video .fancybox__content {
  padding: 0;
  background: rgba(24, 24, 27, 0.9);
  color: #fff;
}

.fancybox__carousel .fancybox__slide.has-map .fancybox__content {
  background: #e5e3df;
}

.fancybox__html5video, .fancybox__iframe {
  border: 0;
  display: block;
  height: 100%;
  width: 100%;
  background: transparent;
}

.fancybox-placeholder {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.fancybox__thumbs {
  flex: 0 0 auto;
  position: relative;
  padding: 0px 3px;
}

.fancybox__container.is-animated[aria-hidden=true] .fancybox__thumbs {
  transition: unset;
  opacity: 0;
}

.fancybox__container.is-animated[aria-hidden=false] .fancybox__thumbs {
  transition: opacity var(--fancybox-ts, 0.25s) ease-in;
  opacity: var(--fancybox-opacity, 1);
}

.fancybox__thumbs .carousel__slide {
  flex: 0 0 auto;
  width: var(--fancybox-thumbs-width, 96px);
  margin: 0;
  padding: 8px 3px;
  box-sizing: content-box;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: visible;
  cursor: pointer;
}

.fancybox__thumbs .carousel__slide.is-nav-selected::after {
  content: "";
  position: absolute;
  top: 0;
  left: 3px;
  right: 3px;
  bottom: 3px;
  border-bottom: 3px solid currentColor;
}

.fancybox__thumbs .carousel__slide > * {
  pointer-events: none;
  -webkit-user-select: none;
     -moz-user-select: none;
          user-select: none;
}

.fancybox__thumb {
  position: relative;
  width: 100%;
  padding-top: calc(100% / (var(--fancybox-thumbs-ratio, 1.5)));
  background-size: cover;
  background-position: center center;
  background-color: rgba(255, 255, 255, 0.1);
  background-repeat: no-repeat;
}

.only-sp {
  display: none;
}

@media screen and (max-width: 1000px) {
  .only-pc {
    display: none;
  }
  .only-sp {
    display: block;
  }
}
header#bg {
  font-family: "Avenir", "Helvetica Neue", "Helvetica", "Arial", "ヒラギノ角ゴ Pro W3", "Hiragino Kaku Gothic Pro", "メイリオ", "Meiryo", "游ゴシック", "Yu Gothic", "ＭＳ Ｐゴシック", sans-serif;
  font-size: 16px;
  height: 90px;
  padding: 10px 0 20px;
  overflow: hidden;
  *zoom: 1;
  border-bottom: 4px solid #F0810B;
}
header#bg .inner {
  width: 1080px;
}
header#bg .logo {
  float: left;
  margin: 20px 0 0 0;
}
header#bg a {
  color: #4E4E4E;
  text-decoration: none;
}
header#bg a:hover {
  color: #4E4E4E;
  opacity: 0.8;
  text-decoration: underline !important;
}
header#bg a:link {
  color: #4E4E4E;
  text-decoration: none;
}
header#bg nav {
  float: right;
}
header#bg .inner {
  position: relative;
}
header#bg .for-listening-lecture {
  position: absolute;
  top: 0px;
  padding: 5px 10px;
  border-radius: 3px;
  color: #fff;
  background-color: #F0810B;
}
header#bg .for-listening-lecture a {
  color: #fff;
}

#header-nav-pc {
  text-align: right;
  margin: 4px 0 10px 0;
}
#header-nav-pc li {
  display: inline-block;
  margin: 0 0 0 0.75rem;
}
#header-nav-pc li:nth-child(1), #header-nav-pc li:nth-child(2) {
  border-right: 1px solid #F0810B;
  padding: 0 0.75rem 0 0;
}

#header-nav {
  text-align: right;
}
#header-nav li {
  display: inline-block;
  margin: 0 0 0 0.75rem;
}

#menu-open {
  display: none;
}

@media only screen and (max-width: 1000px) {
  header#bg {
    position: relative;
  }
  header#bg .inner {
    width: inherit;
    padding-left: 2%;
    padding-right: 2%;
  }
  header#bg .inner .logo {
    max-width: 70% !important;
  }
  header#bg .inner .logo img {
    width: 100%;
  }
  header#bg nav {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    float: none;
    letter-spacing: 1px;
    width: 100%;
    padding-bottom: 100px;
    background-color: #fff;
  }
  header#bg nav ul {
    display: block;
    margin: 0;
    padding: 0;
  }
  header#bg nav li {
    display: block;
    margin: 0;
    padding: 0.75rem 0;
  }
  header#bg nav .for-listening-lecture {
    position: static;
    margin: 0;
    padding: 0.75rem 0;
  }
  header#bg nav #header-nav-pc {
    display: none;
  }
  header#bg nav .for-listening-lecture,
  header#bg nav #header-nav,
  header#bg nav #header-nav-sp {
    border-radius: 0;
  }
  header#bg nav .for-listening-lecture li,
  header#bg nav #header-nav li,
  header#bg nav #header-nav-sp li {
    text-align: left;
    padding-left: 2rem;
  }
  header#bg nav .for-listening-lecture li a,
  header#bg nav #header-nav li a,
  header#bg nav #header-nav-sp li a {
    display: block;
  }
  header#bg nav #header-nav,
  header#bg nav #header-nav-sp {
    background-color: #fff;
  }
  header#bg nav #header-nav li,
  header#bg nav #header-nav-sp li {
    border-bottom: 1px solid #DBDBDB;
    background: url("../images-bg/common/arrow_orange.png") no-repeat 90% center;
  }
  #header-nav ul {
    display: block;
    margin: 0;
    padding: 0;
  }
  #header-nav li {
    display: block;
    margin: 0;
    padding: 0.75rem 0;
  }
  #menu-open {
    display: block;
    text-align: right;
    position: absolute;
    top: 0;
    right: 0;
    height: inherit;
    width: -moz-fit-content;
    width: fit-content;
  }
  #menu-open img {
    height: 100%;
  }
}