@media (min-width: 481px) {
  .header-nav {
    height: 100%;
  }
  .header-nav ul {
    display: flex;
    align-items: center;
    height: 100%;
  }
  .header-nav a::after {
    content: attr(data-ja);
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    left: 0;
    width: 100%;
    letter-spacing: -0.1051vw;
    text-align: center;
    transition: 0.5s ease;
    opacity: 0;
  }
  .header-nav a span {
    transition: 0.5s ease;
  }

  .header-nav a:hover span {
    opacity: 0;
  }
  .header-nav a:hover::after {
    opacity: 1;
  }
}
@media (max-width: 480px) {
  p {
    font-size: 3.4286vw;
  }
  h2 {
    font-size: 5.1429vw;
  }
  h3 {
    font-size: 4.1143vw;
  }
  header {
    height: 15vw;
  }
  .header-logo img {
    width: 60vw;
  }
  .header-nav {
    position: absolute;
    right: 0;
    top: 0;
    height: 100vh;
    width: 64.2857vw;
    z-index: 98;
    background-color: #062745;
    padding: 17.1429vw 3.4286vw 0 6.8571vw;
    transform: translateX(100%);
    transition: 0.5s ease;
  }
  .header-nav.active {
    transform: translateX(0);
  }
  .header-nav ul {
    flex-direction: column;
    align-items: flex-start;
  }
  .header-nav li {
    margin-right: 0;
  }
  .header-nav li + li {
    margin-top: 3.4286vw;
  }
  .header-nav a {
    font-size: 4vw;
  }
  .fv {
    margin-top: 15vw;
  }
  .fv-bg img {
    aspect-ratio: 75 / 56;
    object-fit: cover;
  }
  .fv-title {
    width: 60vw;
  }
  .openbtn {
    display: block;
  }
  /*section*/
  section {
    padding: 6.8571vw 0;
  }
  /*fv-bottom*/
  .fv-bottom {
    padding: 1.7143vw 0;
  }
  .fv-bottom-text {
    align-items: flex-start;
  }
  .fv-bottom-text p {
    font-size: 4.1143vw;
  }
  .fv-bottom-textwrap {
    flex-direction: column;
    width: 85%;
    margin: 0 auto;
  }
  .fv-bottom-text + .fv-bottom-text {
    margin-left: 0;
    margin-top: 1.7143vw;
  }
  .fv-bottom-th::after {
    width: 1.9286vw;
    height: 3.8571vw;
    margin: 0.3429vw 0.8571vw 0;
  }
  .fv-bottom-td span {
    display: block;
  }
  .main-top {
    padding: 6.8571vw 0;
  }
  .main-top-title {
    width: 90vw;
  }
  .main-top-contents {
    display: none;
  }
  .sp-main-top-contents {
    display: block;
    width: 90%;
    margin: 0 auto;
  }
  .sp-main-top-titlewrap {
    position: relative;
  }
 
  .sp-main-top-item h3 {
    color: #fff;
    font-size: 4.4571vw;
    line-height: 1.2;
    width: 100%;
    position: relative;
    z-index: 2;
  }
  .sp-main-top-title {
    background-color: #948041;
    padding: 0.8571vw 2.5714vw;
    width: 80%;
  }
  .sp-main-top-item:nth-of-type(even) .sp-main-top-title {
    margin-left: auto;
  }
  .sp-main-top-img {
    display: block;
    width: 40.7143vw;
    position: absolute;
    bottom: 0;
    z-index: 1;
  }
  .sp-main-top-wrap {
    position: relative;
    z-index: 2;
  }
  .sp-main-top-item {
    margin-top: 30.8571vw;
  }
  .sp-main-top-item:nth-of-type(odd) .sp-main-top-img {
    right: 0;
  }
  .sp-main-top-item:nth-of-type(even) .sp-main-top-img {
    left: 0;
  }

  .sp-main-top-item:nth-of-type(even) h3 {
    text-align: right;
  }

  .sp-main-top-item-box {
    background-color: #fff;
    padding: 1.7143vw 3.4286vw;
  }
  .sp-main-top-item-box {
  }
  .sp-main-top-name {
    border-bottom: 0.2143vw solid #000;
    font-size: 3.2571vw;
  }
  .sp-main-top-name span {
    font-weight: 600;
    margin: 0 0.8571vw 0 1.7143vw;
    font-size: 4.1143vw;
  }
  .sp-main-top-name-br {
    text-align: right;
    display: block;
    font-weight: normal !important;
    font-size: 3.2571vw !important;
  }
  .sp-main-top-name-br span {
    font-weight: 600 !important;
  }
  .sp-main-top-topics {
    font-weight: 600;
    text-align: right;
    margin-top: 0.8571vw;
  }
  /*overview*/
  .overview {
    border-top: 2.1429vw solid #948041;
  }
  .overview-title {
    font-size: 5.1429vw;
    max-width: none;
  }
  .overview-text {
    width: 90%;
    margin: 6.8571vw auto 0;
  }
  .overview-text p {
    font-size: 3.7714vw;
    text-align: left;
    text-indent: 1em;
    line-height: 1.7;
  }
  .overview-text p span {
    font-size: 5.1429vw;
    text-align: center;
    display: block;
  }
  .sp-none {
    display: none !important;
  }
  .overview-text-mt {
    margin-top: 6.8571vw;
  }
  /*conference*/
  .conference-item-title {
    width: 90%;
    margin: 0 auto;
    padding: 2.5714vw 3.4286vw;
  }
  .conference-item-title span {
    display: inline-block;
  }
  .conference-item-text {
    font-size: 3.4286vw;
    width: 90%;
    margin: 3.4286vw auto 0;
  }
  .conference-item-text span {
    font-size: 3.0857vw;
    line-height: 1.3;
    display: block;
  }
  .conference-des-item h3 {
    width: 100%;
    padding: 0.6857vw 3.4286vw;
    font-size: 3.6vw;
    margin: 3.4286vw auto 0;
    text-align: center;
  }
  .conference-des-item p span {
    display: block;
    border-bottom: 0.6429vw solid #000;
    width: fit-content;
    margin-bottom: 0.8571vw;
  }
  .conference-des-text {
    width: 100%;
    margin: 3.4286vw auto 0;
  }
  .conference-des-text p + p {
    margin-top: 3.4286vw;
  }
  .conference-des-item {
    align-items: flex-start;
    width: 90%;
    margin: 3.4286vw auto 0;
    flex-direction: column;
  }
  .conference-des-item + .conference-des-item {
    margin-top: 6.8571vw;
  }

  .conference-des-item-inner {
    width: 100%;
  }
  .conference-des-item-inner h3 {
    width: fit-content;
    margin: 0;
  }
  .conference-des-item-inner .conference-des-text {
    width: fit-content;
    margin: 0 0 0 3.4286vw;
  }
  .conference-des-item-inner p {
    width: fit-content;
    margin: 0;
  }
  .conference-des-item-inner + .conference-des-item-inner {
    margin: 3.4286vw 0 0 0;
  }
  /*.program*/
  .program-contents {
    max-width: none;
  }
  .program-item h2 {
    flex-direction: column;
    align-items: flex-start;
    position: relative;
    font-size: 5.1429vw;
  }
  .program-item h2::before {
    font-size: 4.1143vw;
    font-weight: 400;
  }
  .program-item h2 span {
    margin-left: 0;
    position: absolute;
    right: 0;
    bottom: -5.1429vw;
    font-size: 3.2571vw;
  }
  .program-note {
    text-align: left;
    font-size: 3.0857vw;
  }
  .arrow {
    position: absolute;
    right: 15.4286vw;
    top: 7.3714vw;
    border: 0.2143vw solid #000;
    width: 5.3571vw;
    height: 5.3571vw;
  }
  .arrow::before {
    content: "";
    display: inline-block;
    vertical-align: middle;
    color: #333;
    line-height: 1;
    width: 1.7143vw;
    height: 1.7143vw;
    border: 0.1em solid currentColor;
    border-left: 0;
    border-bottom: 0;
    box-sizing: border-box;
    transform: translateX(-25%) rotate(45deg);
  }
  .program-table {
    display: none;
  }
  .sp-program-table {
    display: table;
  }
  .program-table span.sp-col {
    display: block;
    transform: rotate(90deg);
    margin-left: 0;
    font-size: 2.7429vw;
  }
  .table-top th {
    font-size: 2.9143vw;
    text-align: center;
  }
  .table-top th + th {
    text-align: center;
  }
  .program-table td {
    font-size: 2.7429vw;
  }
  .td-first,
  .th-first {
    width: 11.2569vw;
  }
  .td-second,
  .th-second {
    width: 24.9652vw;
    padding: 0.5806vw 1.1611vw;
  }

  .td-third,
  .th-third {
    width: calc(100% - 10.2221vw);
    padding: 0.5806vw 1.1611vw;
  }
  .program-table span {
    font-size: 2.0571vw;
  }
  /*virtual-banner*/
  .virtual-banner {
    padding: 3.4286vw;
  }
  .virtual-banner::before {
    width: calc(100% - 4.8vw);
    height: calc(100% - 4.8vw);
    border: 0.4286vw solid #948041;
  }
  .virtual-banner-inner {
    padding: 3.4286vw;
    border: 0.3214vw solid #948041;
  }
  .virtual-banner-main {
    flex-direction: column;
    font-size: 3.4286vw;
  }
  .virtual-banner-main span {
    font-size: 6.8571vw;
  }
  .virtual-banner-date {
    font-size: 3.7714vw;
  }

  /*ticket*/
  .ticket h2.ticket-title {
    flex-direction: row;
    align-items: center;
  }
  .ticket-des-textwrap {
    width: 100%;
  }
  .ticket-des-text.sp-dir {
    flex-direction: column;
  }
  .ticket-des-text-termbox {
    margin-top: 1vw;
  }
  .ticket-des-text-term {
    font-size: 3.2vw;
  }
  .sp-dir .ticket-des-text-term {
    margin-left: 0;
  }
  .ticket-top {
    font-size: 3.7714vw;
    margin-top: 3.4286vw;
  }
  .ticket-des-item {
    flex-direction: column;
    margin-top: 5.1429vw;
  }
  .ticket-des-item h3 {
    font-size: 3.7714vw;
    border-bottom: 0.2143vw solid #fff;
    width: 100%;
    padding-bottom: 0.8571vw;
  }
  .ticket-des-note {
    display: block;
    text-align: right;
    margin-left: 0;
    font-size: 2.7429vw;
  }
  .ticket-des-text-alphabet {
    width: 20.3571vw;
  }
  .ticket-des-text-alphabet span {
    padding: 0 3.4286vw;
  }
  .ticket-des-text {
    padding: 0.8571vw 0;
    margin-left: 0;
  }
  .ticket-des-span {
    display: block;
    margin-left: 1.7143vw;
    font-size: 3.2571vw;
  }
  .ticket-table {
    display: none;
  }
  .sp-ticket-tablewrap {
    display: block;
    margin-top: 6.8571vw;
  }
  .sp-ticket-table {
    border: 0.2143vw solid #fff;
  }
  .sp-ticket-table h3 {
    background-color: #fff;
    color: #14126f;
    font-size: 3.7714vw;
    text-align: center;
  }
  .sp-ticket-table h3 span {
    margin-left: 2.5714vw;
    display: inline-block;
  }
  .sp-ticket-box {
    padding: 1.7143vw;
  }
  .sp-ticket-text {
    padding-bottom: 0.8571vw;
  }
  .sp-ticket-price {
    padding: 0.8571vw;
    display: flex;
    align-items: center;
    border-top: 0.2143vw solid #fff;
  }
  .sp-ticket-price-text {
    width: calc(100% - 21.4286vw);
    padding-right: 2vw;
  }
  .sp-ticket-price-text p {
    text-align: center;
    padding: 1vw 0;
  }
  .sp-ticket-price-text p + p {
    border-top: 0.2143vw solid #fff;
  }
  .sp-ticket-price span {
    margin-left: 1.7143vw;
  }
  .sp-ticket-btn {
    color: #000;
    width: 21.4286vw;
    padding: 0.2vw 0;
    background: radial-gradient(ellipse at center, #ffffff 0%, #dddddd 100%);
    color: #1a0d0d;
    font-weight: bold;
    border-radius: 0.8571vw;
    border: none;
    box-shadow: 0 0.2903vw 0.5806vw rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3.4286vw;
  }
  .sp-ticket-btn::after {
    content: "";
    display: inline-block;
    vertical-align: middle;
    color: #333;
    line-height: 1;
    width: 0;
    height: 0;
    border-style: solid;
    border-color: transparent;
    border-width: 0.5em 0.7em;
    border-left-color: currentColor;
    border-right: 0;
    margin-left: 0.6857vw;
    margin-top: 0;
    position: relative;
  }

  .sp-ticket-table + .sp-ticket-table {
    margin-top: 6.8571vw;
  }
  .sp-ticket-table h3 .sp-ticlet-note {
    color: #e8222a;
    margin-left: 0;
    font-size: 3.0857vw;
  }
  /*.place*/
  .place {
    padding: 5.1429vw;
  }
  .place-name-en {
    font-size: 3.9429vw;
    line-height: 1.5;
  }
  .place-name-en span {
    display: block;
  }
  .program-item h2.place-name {
    font-size: 7.8857vw;
    padding-bottom: 2.5714vw;
  }
  .program-item h2.place-name::after {
    height: 2.1429vw;
  }
  .place-contents {
    display: block;
    position: relative;
  }
  .place-textwrap {
    width: 100%;
    margin-top: 1.7143vw;
  }
  .place-textwrap p {
    font-size: 3.2571vw;
  }
  .place-access span {
    display: block;
  }
  .place-morebtn a {
    width: 36.4286vw;
    font-size: 3.7714vw;
  }
  .place-morebtn {
    margin-top: 3.4286vw;
  }
  .place-arrow {
    width: 0.8em;
    height: 0.1em;
  }

  .place-arrow::before {
    width: 0.65em;
    height: 0.65em;
  }

  .place-arrow-wrap {
    width: 5.3571vw;
    height: 5.3571vw;
  }
  .place-morebtn a {
    padding: 0.5143vw 1.0286vw 0.5143vw 3.4286vw;
  }
  .place-img {
    position: absolute;
    right: 0;
    top: 0;
    width: 32.1429vw;
  }
  .place-img img {
    aspect-ratio: 1.1/1;
  }
  .place-access {
    margin-top: 3.4286vw;
  }
  .place-access p {
    margin-top: 0.8571vw;
  }
  /*.section*/
  .section-title::before {
    font-size: 12vw;
  }
  .section-title span {
    font-size: 4.4571vw;
  }
  .section-title::after {
    height: 1.2857vw;
    width: 100%;
  }
  .sponsor-lists {
    margin-top: 0.8571vw;
  }
  .sponsor-lists h3 {
    font-size: 3.9429vw;
  }
  .sponsor-item img {
    width: 42.8571vw;
    margin-top: 3.4286vw;
  }
  .host-item img {
    width: 75vw;
  }
  .auspices-item img {
    width: 36.4286vw;
  }
  .sponsor-lists {
    margin-top: 0.8571vw;
  }
  /*footer*/
  .small {
    font-size: 3.0857vw;
  }

  /*調整*/
  .program-table td.td-second {
    font-size: 2.53vw;
  }

  .conference-des-text span.ls-adjust02 {
    display: inline;
    margin: 0 0.5357vw;
  }

  .conference-des-text span.ls-adjust03 {
    display: inline;
    margin: 0 1.214vw;
  }
  .conference-des-text span.ls-adjust04 {
    display: inline;
  }
  .ticket-des-text {
    width: 100%;
  }
  .conference-des-text p span.adjust-note {
    font-size: 2.8vw;
    margin-bottom: 0;
  }
  .conference-des-text p span.adjust-note {
    margin-top: 0.75vw;
  }
  .sp-ticket-btnwrap a {
    margin: 2vw 0;
  }
}