@media (max-width: 768px) {
  #loading {
    display: none;
  }
  .wrap {
    width: 100%;
    min-width: 0;
  }
  .header {
    width: 100%;
    height: auto;
    aspect-ratio: 768/1105;
    background: url("../images/header-bg-m.png") no-repeat center;
    background-size: contain;
  }
  .header .inner {
    display: none;
  }
  .logo {
    display: none;
  }
  .promo-btn {
    display: none;
  }
  .social-btns {
    display: none;
  }
  #particles-js {
    display: none;
  }
  .top-menu {
    display: none;
  }
  .inner {
    width: 100%;
  }
  .container {
    min-width: 0;
  }
  .sec {
    width: 100%;
    margin-top: 0;
    height: auto;
    padding-top: 0;
    padding: 0 5%;
  }
  .title-box {
    width: 100%;
    top: 20px;
  }
  .title-box img {
    max-width: 100%;
  }
  .sec1-1-content {
    height: auto;
  }
  .sec1-word {
    width: 100%;
    height: auto;
    aspect-ratio: 712/1282;
    background: url("../images/sec1-word-m.png") no-repeat center;
    background-size: contain;
    margin-top: 10px;
  }
  .sec1-cloud-out {
    display: none;
  }
  .sec1-girl {
    position: relative;
    width: 80%;
    margin: 0 auto;
    height: auto;
    top: 0;
    left: 0;
  }
  .sec1-girl-pic {
    width: 100%;
    height: auto;
    aspect-ratio: 584/732;
    background-size: contain;
  }
  .sec1-girl-shadow {
    width: 100%;
    height: auto;
    aspect-ratio: 454/85;
    background-size: contain;
    left: 0;
  }
  .sec1-introbox {
    position: relative;
    width: 100%;
    height: auto;
    margin: 0 auto;
    background: none;
    top: 0;
    right: 0;
  }
  .sec1-stats-box {
    position: relative;
    width: 100%;
    top: 0;
    right: 0;
    background: #1d213d;
    border-radius: 15px;
    padding: 8%;
    border: 3px solid #ffe68d;
    -webkit-box-shadow: 0 20px 20px 0 rgba(0, 0, 0, 0.3);
            box-shadow: 0 20px 20px 0 rgba(0, 0, 0, 0.3);
  }
  .stat-label {
    font-size: 14px;
    min-width: 65px;
    border-radius: 10px;
  }
  .stat-value {
    font-size: 14px;
  }
  .stat-box {
    padding-right: 10px;
    line-height: 1.5;
  }
  .sec1-cloud-left, .sec1-cloud-right {
    display: none;
  }
  .sec1-girl-intro-m {
    display: block;
    width: 100%;
    margin-bottom: 20px;
  }
  .sec1-girl-intro-m img {
    max-width: 100%;
  }
  .sec1-shine {
    display: none;
  }
  .sec1-1-bg {
    display: none;
  }
  .sec1-2-content {
    width: 100%;
    height: auto;
    border: 3px solid #ffe68d;
    border-radius: 15px;
    overflow: hidden;
    -webkit-box-shadow: 0 20px 20px 0 rgba(0, 0, 0, 0.3);
            box-shadow: 0 20px 20px 0 rgba(0, 0, 0, 0.3);
    margin-bottom: 50px;
  }
  .swiper {
    width: 100%;
    height: auto;
    top: 0;
  }
  .swiper-button-next, .swiper-button-prev {
    display: none !important;
  }
  .swiper-pagination {
    bottom: -7px !important;
    opacity: 1 !important;
  }
  .swiper-pagination-bullet {
    background: #ffe68d !important;
    opacity: 1;
  }
  .swiper-pagination-bullet-active {
    background: #c2cc54 !important;
  }
  .sec1-2-pic {
    width: 100%;
    height: auto;
    aspect-ratio: 750/1334;
    background-size: contain;
  }
  .sec1-2-word {
    width: 100%;
    height: auto;
    aspect-ratio: 750/1334;
    background: url("../images/sec1-2-word-m.png") no-repeat center;
    background-size: contain;
    margin-top: 10px;
  }
  .sec2-word1 {
    width: 100%;
    height: auto;
  }
  .sec2-word1 img {
    max-width: 100%;
  }
  .sec2-gift-boxes {
    display: block;
  }
  .sec1-gift-box {
    width: 100%;
    aspect-ratio: 555/721;
    background-size: contain;
  }
  .sec1-gift-box {
    height: auto;
    margin-bottom: 20px;
  }
  .reward-btn, .noreward-btn {
    width: 70%;
    aspect-ratio: 282/105;
    background-size: contain;
    bottom: 6%;
    height: auto;
  }
  .sec2-notice-box {
    width: 100%;
  }
  .sec2-notice-title {
    width: 100%;
    height: auto;
  }
  .sec2-notice-title img {
    max-width: 100%;
  }
  .sec2-notice-list {
    width: 100%;
  }
  .sec2-notice-list li {
    margin-left: 1.5rem;
    font-size: 14px;
  }
  .paper-content-box {
    width: 100%;
    top: 0;
  }
  .paper-content-box .paper-content-box-top {
    width: 100%;
    height: auto;
    padding-top: 13.37%;
    background-size: contain;
  }
  .paper-content-box .paper-content-box-middle {
    width: 100%;
    aspect-ratio: 1085/24;
    background-size: contain;
    padding: 3% 7%;
    font-size: 14px;
  }
  .paper-content-box .paper-content-box-bottom {
    width: 100%;
    height: auto;
    aspect-ratio: 1085/100;
    background-size: contain;
  }
  .sec3-gift, .sec4-pic2, .sec6-gift {
    width: 100%;
    margin: 20px 0;
  }
  .sec3-gift img, .sec4-pic2 img, .sec6-gift img {
    max-width: 100%;
  }
  .sec6-girl {
    display: none;
  }
  .subtitle-s {
    width: 100%;
  }
  .subtitle-s img {
    max-width: 100%;
  }
  .cont-d-list {
    font-size: 14px;
    line-height: 1.2;
  }
  .sec4-word {
    width: 100%;
    height: auto;
  }
  .sec4-word img {
    max-width: 100%;
  }
  .flexboxes {
    display: block;
  }
  .flexbox img {
    max-width: 100%;
  }
  .sec6-word img {
    max-width: 100%;
  }
  .serial-box {
    margin: 0 auto;
    width: 100%;
    margin-top: 30px;
  }
  .serial-box .code-box {
    padding-right: 5px;
  }
  .serial-box .label {
    width: 50px;
    font-size: 14px;
    padding: 0 5px;
  }
  .serial-box .code {
    font-size: 14px;
  }
  .sec6-gift {
    padding-left: 0;
  }
  .sec6-gift img {
    max-width: 100%;
  }
  .popup-bg {
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    position: fixed;
    top: 0;
    left: 0;
    z-index: 9999;
  }
  .popup-box {
    width: 90%;
    max-width: 500px;
    height: auto;
    background: #fff;
    border-radius: 15px;
    position: fixed;
    top: 50%;
    left: 50%;
    -webkit-transform: translate(-50%, -50%);
            transform: translate(-50%, -50%);
    z-index: 10000;
  }
  .popup-content {
    max-height: 500px;
    overflow: scroll;
    padding: 15% 7% 7% 7%;
  }
  .notice-popup, .ios-test-info {
    font-size: 14px;
  }
  .join-ios-test-btn {
    width: 90%;
  }
  .footer {
    height: auto;
  }
  .footer-inner {
    width: 100%;
    height: auto;
    display: block;
    padding-top: 40px;
    padding-bottom: 40px;
  }
  .footer-links {
    text-align: center;
    margin-top: 10px;
  }
  .footer-center a {
    width: 100%;
  }
  .footer-center a img {
    width: 100%;
  }
  .footer-logo-box {
    text-align: center;
  }
  .footer-logo-box img {
    max-width: 100%;
  }
  .logout-btn {
    width: 100%;
    height: 50px;
    position: relative;
    margin: 0 auto;
    top: 0;
    right: 0;
    margin-bottom: 20px;
    background: #8d857b;
    color: #fff;
    font-size: 18px;
    text-indent: 0;
  }
  .copyright {
    text-align: center;
  }
  .footer-social .footer-inner {
    height: 100px !important;
  }
  .footer-main .footer-inner {
    padding: 10% 7%;
  }
  .footer-left, .footer-right {
    display: block;
    height: auto;
  }
  .footer-left {
    margin-bottom: 20px;
    text-align: center;
  }
  .lager-logo, .class-level {
    margin: 0 auto 20px auto;
  }
  .footer-main {
    height: auto;
  }
  .footer-right {
    margin-top: 10px;
    margin-left: 0;
  }
  .class-level {
    margin: 20px auto 20px auto;
  }
  .footer-lager-logo, .footer-rg-logo {
    margin-bottom: 10px;
  }
  .hamburger {
    display: block;
    opacity: 1;
    right: 15px;
  }
  .lightbox {
    position: relative;
    width: min(94vw, 644px);
    aspect-ratio: 644/828;
    background: url("../images/lightbox-bg-m.png") center/contain no-repeat;
    border-radius: 12px;
    margin: 0 5%;
  }
  .btn-group {
    position: absolute;
    left: 50%;
    -webkit-transform: translateX(-50%);
            transform: translateX(-50%);
    bottom: 9.5%;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-column-gap: 3%;
       -moz-column-gap: 3%;
            column-gap: 3%;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
    -ms-flex-wrap: wrap;
        flex-wrap: wrap;
  }
  .btn-group a {
    display: block;
    width: 100%;
    margin-bottom: 10px;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
  }
  .btn-group a img {
    width: 100%;
    height: auto;
  }
}