.section .inner {
  position: relative;
  width: 100%;
  padding: 1.6rem;
  margin: 0 auto;
  max-width: 158rem;
}

@media all and (min-width: 80em) {
  .section .inner {
    padding: 0 max(2.9167vw, 3.2rem);
  }
}

.top-banner {
  position: relative;
  height: 48rem;
  margin-bottom: 10rem;
}

.top-banner .inner {
  z-index: 2;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100%;
}

.top-banner .page-tit {
  position: relative;
  font-size: 6.4rem;
  font-weight: 700;
  color: #fff;
}

.top-banner.no-bg .page-tit {
  color: #000;
}

.top-banner .top-bg {
  z-index: 1;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 48rem;
  filter: brightness(.6);
}

.top-banner .top-bg::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 48rem;
  backdrop-filter: blur(.2rem);
}

.company .top-bg {
  background: url(../source/images/banner_company.jpg)no-repeat center / cover;
}

.case .top-bg {
  background: url(../source/images/banner_case.jpg)no-repeat center / cover;
}

.product .top-bg,
.product-detail .top-bg {
  background: url(../source/images/banner_product.jpg)no-repeat center / cover;
}

.contact .top-banner {
  height: 12rem;
}

/* beradcrumb */
.breadcrumb {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 54rem;
  margin: 0 auto;
  padding: 1.6rem;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(.5rem);
}

.no-bg .breadcrumb {
  border: .1rem solid rgba(0, 0, 0, .2);
  background: #fff;
}

.breadcrumb .divider {
  position: static;
  width: .2rem;
  height: 1.6rem;
  font-size: 1.6rem;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.36);
  opacity: 1;
}

.no-bg .breadcrumb .divider {
  background: rgba(0, 0, 0, 0.36);
}

.bc-item.home a {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 3.6rem;
  height: 3.6rem;
  font-size: 2.2rem;
}

.bc-item.home a ion-icon {
  color: #fff;
}

.no-bg .bc-item.home a ion-icon {
  color: #000;
}

.bc-item.select-box {
  position: relative;
  display: flex;
  justify-content: space-between;
  width: 100%;
  min-width: 1.4rem;
  height: 3.6rem;
  cursor: pointer;
}

.bc-btn {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: .8rem 1.6rem;
  border-radius: .8rem;
  color: #fff;
  cursor: pointer;
  transition: 0.3s;
}

.no-bg .bc-btn {
  color: #000;
}

.bc-btn:hover,
.bc-item.active .bc-btn {
  background: rgba(255, 255, 255, 0.2);
}

.no-bg .bc-btn:hover,
.no-bg .bc-item.active .bc-btn {
  color: #000;
}

.bc-btn .label,
.bc-btn ion-icon {
  color: #fff;
}

.no-bg .bc-btn .label,
.no-bg .bc-btn ion-icon {
  color: #000;
}

.bc-btn span {
  font-size: 1.6rem;
  font-weight: 500;
}

.bc-btn ion-icon {
  font-size: 1.8rem;
  transition: 0.3s;
}

/* 리스트 열릴 때 화살표 회전 */
.bc-item.active .bc-btn ion-icon {
  transform: rotate(180deg);
}

.bc-list {
  position: absolute;
  top: calc(100% + 5px);
  left: 0;
  width: 100%;
  background: #333;
  border-radius: 8px;
  overflow: hidden;
  display: none;
  z-index: 100;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.no-bg .bc-list {
  background-color: #fff;
}

.bc-item.active .bc-list {
  display: block;
}

.bc-list li a {
  display: block;
  padding: 12px 15px;
  color: #ccc;
  font-size: 1.5rem;
  transition: 0.2s;
}

.no-bg .bc-list li a {
  color: #212121;
}

.bc-list li a:hover {
  background: #444;
  color: #fff;
}

.no-bg .bc-list li a:hover {
  background: #ededed;
  color: #000;
}

@media all and (min-width: 48em) {
  .contact .top-banner {
    height: 24rem;
  }

  .breadcrumb {
    bottom: 2.4rem;
    border-radius: .8rem;
  }

  .bc-item.select-box {
    width: 20rem;
    height: 4.8rem;
  }
}

@media all and (min-width: 80em) {
  .contact .top-banner {
    height: 36rem;
  }
}

/* about */
.overview .wrapper {
  display: flex;
  flex-direction: column;
  padding: 10rem 2.4rem;
  border-radius: 2.4rem;
  background: url(../source/images/overview.jpg)no-repeat center / cover;
}

.overview .section-tit {
  margin-bottom: 8rem;
  text-align: center;
}

.overview .section-tit span {
  font-size: 2rem;
  font-weight: 600;
  color: #fff;
}

.overview .section-tit h4 {
  font-size: 3.2rem;
  font-weight: 800;
  color: #fff;
}

.overview .section-content p {
  text-align: center;
  font-size: 1.6rem;
  color: #fff;
}

.vision .section-tit span,
.mission .section-tit span {
  font-size: 2rem;
  font-weight: 600;
  color: #3251A1;
}

.vision .section-tit {
  text-align: center;
  margin-bottom: 8rem;
}

.vision .section-tit h4 {
  margin-bottom: 2.4rem;
  line-height: 1.3;
  font-size: 3.2rem;
  font-weight: 800;
}

.vision .section-tit p {
  font-size: 1.6rem;
}

.vision .section-content {
  position: relative;
  width: fit-content;
}

.vision .card-wrap {
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
  width: fit-content;
}

.vision .card-wrap .card {
  width: fit-content;
  height: fit-content;
  border-radius: 2rem;
}

.vision .card-wrap .card div {
  height: 48rem;
  padding: 70% 2.4rem 2.4rem;
  border-radius: 2rem;
  border: .1rem solid rgba(0, 0, 0, .2);
  transition: all .5s ease;
}

.vision .card-wrap .card:hover {
  box-shadow: 0 0 1.6rem 0 rgba(0, 0, 0, .24);
}

.vision .card-wrap .card div:hover {
  border-color: #3251A1;
  background-color: rgba(0, 55, 197, .8);
}

.vision .card-wrap .card div:hover * {
  color: #FFF;
}

.vision .card-wrap .card:nth-child(1) {
  background: url(../source/images/vision1.png) no-repeat top 0 center / 100%;
}

.vision .card-wrap .card:nth-child(2) {
  background: url(../source/images/vision2.png) no-repeat top 0 center / 100%;
}

.vision .card-wrap .card:nth-child(3) {
  background: url(../source/images/vision3.png) no-repeat top 0 center / 100%;
}

.vision .card-wrap .card:nth-child(4) {
  background: url(../source/images/vision4.png) no-repeat top 0 center / 100%;
}

.vision .card-wrap .card strong {
  font-size: 2rem;
  font-weight: 600;
}

.vision .card-wrap .card h5 {
  margin: 2rem 0;
  line-height: 1.3;
  font-size: 2.4rem;
  font-weight: 700;
}

.vision .card-wrap .card p {
  line-height: 1.3;
  font-size: 1.6rem;
  font-weight: 400;
}

.vision .spacing:last-child {
  margin-top: 10rem
}

.address-list .section-tit {
  margin-bottom: 4rem;
}

.address-list .section-tit span {
  font-size: 2.4rem;
  font-weight: 600;
  color: #3251A1;
}

.address-list .section-tit h4 {
  font-size: 3.2rem;
  font-weight: 800;
}

@media all and (min-width: 48em) {
  .vision .card-wrap {
    display: grid;
    gap: 1.6rem;
    grid-template-columns: repeat(2, 1fr)
  }
}

@media all and (min-width: 64em) {
  .overview .wrapper {
    justify-content: center;
    align-items: center;
    height: 72rem;
  }

  .overview .section-tit span {
    font-size: 2.4rem;
  }

  .overview .section-tit h4 {
    font-size: 4rem;
  }

  .overview .section-content p {
    max-width: 90rem;
    font-size: 2rem;
  }

  .vision .section-tit {
    text-align: left;
  }

  .vision .section-tit span,
  .mission .section-tit span {
    font-size: 2.4rem;
  }

  .vision .section-tit h4 {
    margin-bottom: 6.4rem;
    line-height: 1.3;
    font-size: 4.8rem;
  }

  .vision .section-tit p {
    font-size: 2.4rem;
  }

  .vision .card-wrap .card div {
    width: 40rem;
    height: 50rem;
  }

  .address-list .section-tit span {
    font-size: 2.4rem;
  }

  .address-list .section-tit h4 {
    font-size: 4.8rem;
  }
}

@media all and (min-width: 80em) {
  .vision .section-tit {
    float: left;
  }

  .vision .section-content {
    float: right;
  }

  .vision .spacing:last-child {
    clear: both;
  }

  .vision .card-wrap {
    margin-top: 10rem;
  }

  .vision .card-wrap .card:nth-child(2n) {
    transform: translateY(10rem);
  }
}

/* history */
.section.timeline {
  position: relative;
  width: 100%;
  background: #fff;
}

.history-sticky-container {
  display: flex;
  align-items: flex-start;
  padding-top: 43.2rem;
  padding-bottom: 20rem;
}

.history-left {
  flex: 0 0 40%;
  position: sticky;
}

.year-display {
  font-size: 4rem;
  font-weight: 800;
  line-height: 1;
  margin: 0;
}

.history-nav {
  margin-top: 2rem;
  display: flex;
  gap: 1rem;
}

.history-nav button {
  background: #f4f4f4;
  border: none;
  padding: 1rem;
  cursor: pointer;
  border-radius: 50%;
  display: flex;
  align-items: center;
  font-size: 1.5rem;
  transition: 0.3s;
}

.history-nav button:hover {
  background: #3b4cb8;
  color: #fff;
}

.history-right {
  flex: 0 0 60%;
}

.history-group {
  min-height: 60vh;
  padding-top: 24vh;
}

/* 연도별 여백 */
.history-item {
  display: flex;
  gap: 2rem;
  margin-bottom: 2.5rem;
  font-size: 1.25rem;
  align-items: flex-start;
}

.history-item .month {
  min-width: 3rem;
  font-size: 1.6rem;
  font-weight: 700;
  color: #3b4cb8;
}

.history-item .desc {
  font-size: 1.6rem;
  font-weight: 600;
}

@media all and (min-width: 48em) {
  .history-sticky-container {
    padding-top: 20rem;
  }

  .year-display {
    font-size: 8rem;
  }

  .history-item .month {
    font-size: 2rem;
  }

  .history-item .desc {
    font-size: 2rem;
  }
}


@media all and (min-width: 64em) {
  .history-sticky-container {
    padding-top: 32rem;
  }
}

@media all and (min-width: 96em) {
  .year-display {
    font-size: 12rem;
  }
}

/* location */
.root_daum_roughmap_landing {
  width: 100% !important;
}

.root_daum_roughmap .wrap_map {
  height: 64rem !important;
}

.branch .root_daum_roughmap .wrap_map {
  height: 48rem !important;
}

.root_daum_roughmap .wrap_controllers,
.root_daum_roughmap .cont {
  display: none;
}

.address-list .section-content {
  display: flex;
  flex-direction: column;
  gap: 16rem;
}

.detail-info>p {
  margin: 4rem 0;
  font-size: 4rem;
  font-weight: 700;
}

.detail-info .address-detail>*:not(:last-child) {
  margin-bottom: 1.6rem;
}

.detail-info .address-detail p {
  font-size: 2rem;
}

.detail-info .address-detail span {
  font-size: 2rem;
  font-weight: 700;
}

.detail-info .row-detail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .4rem;
}

.detail-info .row-detail div {
  font-size: 2rem;
}

.detail-info .row-detail div:not(:last-child) {
  display: flex;
  justify-content: center;
  align-items: center;
  min-width: 2.4rem;
  height: 2.4rem;
  font-weight: 600;
  color: #fff;
}

.seoul .detail-info .row-detail div:nth-child(1) {
  border-radius: 50%;
  background: #3DB44B;
}

.seoul .detail-info .row-detail div:nth-child(2) {
  border-radius: 50%;
  background: #924BDE;
}

.seoul .detail-info .row-detail div:nth-child(3) {
  padding: 0 1rem;
  border-radius: 4rem;
  background: #69CCCC;
}

.seoul .detail-info .row-detail div:nth-child(4) {
  padding: 0 1rem;
  border-radius: 4rem;
  background: #FFCE32;
}

.branch .detail-info .row-detail div:nth-child(1) {
  border-radius: 50%;
  background: #3DB44B;
}

@media all and (min-width: 48em) {
  .detail-info .address-detail div:nth-child(2) {
    display: flex;
    line-height: 2rem;
  }

  .detail-info .address-detail div:nth-child(2) p:first-child {
    padding-right: 1rem;
    margin-right: 1rem;
    border-right: .2rem solid rgba(0, 0, 0, .5);
  }
}

@media all and (min-width: 96em) {
  .detail-info {
    display: flex;
    flex-direction: row;
    gap: 8rem;
    margin-top: 6.4rem;
  }

  .detail-info>p {
    min-width: 30rem;
    margin: 0;
  }
}

/* case */
.case .project .section-content {
  display: flex;
  flex-direction: column-reverse;
  justify-content: center;
  align-items: center;
  gap: 4rem;
  text-align: center;
}

.case .project .section-content img {
  display: block;
}

.case .project .section-content h4 {
  font-size: 4rem;
}

.case .project .section-content p {
  font-size: 2rem;
}

@media all and (min-width: 64em) {
  .case .project .section-content {
    display: flex;
  }

  .case .project .section-content img {
    width: 48%;
  }
}

/* FAQ */
/* 카테고리 버튼 */
.category {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 4rem;
}

.category button {
  padding: 1.6rem 2.4rem;
  border-radius: 30px;
  border: .1rem solid #ddd;
  background: #fff;
  font-size: 1.6rem;
  font-weight: 600;
  cursor: pointer;
  transition: 0.3s;
}

.faq .category button.active {
  background: #3b4cb8;
  color: #fff;
  border-color: #3b4cb8;
}

.category button:hover {
  background: #ddd;
}

/* FAQ 리스트 */
.faq-list {
  max-width: 100rem;
  margin: 0 auto;
}

.faq-item {
  overflow: hidden;
  margin-bottom: 15px;
  border: .1rem solid rgba(0, 0, 0, .2);
  border-radius: 15px;
  background: #fff;
  opacity: 1;
}

.faq-item.active {
  border-color: #3251A1;
}

.faq-question {
  padding: 25px 30px;
  display: flex;
  align-items: center;
  cursor: pointer;
  position: relative;
}

.faq-question .q-num {
  margin-right: 15px;
  font-size: 2rem;
  font-weight: bold;
  color: #4A65AF;

}

.faq-question .txt {
  flex: 1;
  font-size: 2rem;
  font-weight: 500;
}

.faq-question .toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: none;
  border-radius: 50%;
  background: #f4f4f4;
}

.faq-item .toggle-btn ion-icon {
  font-size: 2.4rem;
  color: #000;
  transition: transform 0.3s ease;
}

.faq-item.active .toggle-btn ion-icon {
  transform: rotate(180deg);
}

/* 답변 영역 */
.faq-answer {
  display: none;
  /* 초기값 숨김 */
}

.answer-inner {
  padding: 25px 30px;
  display: flex;
}

.faq-answer .a-label {
  margin-right: 15px;
  font-size: 2rem;
  font-weight: bold;
}

.faq-answer .txt {
  line-height: 1.6;
  font-size: 2rem;
  color: #212121;
}

/* contact */
.inquiry-type .section-content {
  text-align: center;
}

.construction-visual img {
  display: block;
  width: 100%;
  margin-bottom: 4rem;
}

.email-title {
  font-size: 24px;
  font-weight: 700;
  color: #333;
  margin-bottom: 15px;
}

.email-guide {
  font-size: 16px;
  line-height: 1.6;
  color: #666;
  margin-bottom: 30px;
}

.email-copy {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  background: #fff;
  border: .1rem solid #3251A1;
  padding: 15px 25px;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
}

.email-copy:hover {
  color: #fff;
  background: #3251A1;
  box-shadow: 0 5px 15px rgba(74, 101, 175, 0.1);
}

.email-copy ion-icon {
  color: #3251A1;
}

.email-copy:hover ion-icon {
  color: #fff;
}

.email-address {
  font-size: 18px;
  font-weight: 600;
  color: #4A65AF;
  margin-right: 15px;
}

.email-copy:hover .email-address {
  color: #fff;
}

.copy-btn {
  display: flex;
  align-items: center;
  font-size: 20px;
  color: #999;
}

@media all and (min-width: 64em) {
  .construction-visual img {
    width: 50%;
    margin: 0 auto 4rem;
  }
}

@media all and (min-width: 96em) {
  .contact .inquiry-type .section-content {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6.4rem;
  }

  .construction-visual {
    width: 50%;
  }

  .construction-visual img {
    width: 100%;
    margin: 0;
  }

  .email-title {
    font-size: 4rem;
  }

  .email-guide {
    margin-bottom: 4.8rem;
    font-size: 2rem;
  }

  .email-copy {
    transform: scale(1.2);
  }
}

/* 개인정보처리방침 */
.policy {
  margin-top: 12rem;
}

.policy .wrapper {
  display: flex;
  flex-direction: column;
  gap: 4.8rem;
}

.policy .section-tit h4 {
  margin-bottom: 1.6rem;
  font-size: 4rem;
}

.policy .section-tit p,
.policy .section-tit strong {
  font-size: 2rem;
}

.policy .section-content {
  display: flex;
  flex-direction: column;
  gap: 2.4rem;
}

.policy .section-content h5 {
  margin-bottom: 1.6rem;
  font-size: 2rem;
}

.policy .section-content p,
.policy .section-content strong,
.policy .section-content li {
  margin-bottom: 1rem;
  font-size: 1.8rem;
}

@media all and (min-width: 120em) {
  .policy .wrapper {
    flex-direction: row;
  }

  .policy .section-tit {
    width: 36%;
  }
}

/* product */
.product .top-banner .product .inner {
  padding: 1.6rem;
}

.product .intro .section-tit {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 4rem;
}

.product .intro h4 {
  font-size: 4.8rem;
}

.product .intro .section-tit p {
  text-align: center;
  font-size: 2.4rem;
  font-weight: 600;
}

.product .intro .section-tit span {
  font-size: 2.4rem;
  font-weight: 600;
  color: #3251A1;
}

.product .intro .section-tit img {
  display: block;
  width: 90%;
  max-width: 52rem;
  margin-top: 8rem;
}

.product .intro-group:not(:last-child) {
  padding-bottom: 4rem;
  margin-bottom: 4rem;
}

.product .intro-header {
  margin-bottom: 3.2rem;
}

.product .intro-header p {
  display: flex;
  flex-direction: column;
  align-items: center;
  font-size: 2.4rem;
  font-weight: 800;
}

.product .intro-header span {
  line-height: 2.4rem;
  font-size: 2rem;
  font-weight: 400;
  color: rgba(0, 0, 0, 0.48);
}

.product .intro-body p {
  text-align: center;
  font-size: 2rem;
}

.product .intro-body p::before {
  content: "";
  position: relative;
  display: inline-block;
  width: .5rem;
  height: .5rem;
  border-radius: 50%;
  margin: .5rem 1rem;
  background-color: #000;
}

.product .intro-body strong {
  font-size: 2rem;
}

.product .diagram .section-tit {
  margin-bottom: 6rem;
  text-align: center;
}

.product .diagram .section-tit span {
  line-height: 2.4rem;
  font-size: 2.4rem;
  font-weight: 700;
}

.product .diagram .section-tit sup {
  font-size: 2rem;
  vertical-align: super;
}

.product .diagram .section-tit h4 {
  margin-bottom: 2.4rem;
  font-size: 4rem;
  font-weight: 800;
}

.product .diagram .section-tit p {
  font-size: 2rem;
}

.product .diagram .stack-wrapper {
  display: flex;
  flex-direction: column;
  height: fit-content;
}

.product .diagram .stack-wrapper .layer {
  position: relative;
}

.product .diagram .stack-wrapper .layer:not(:first-child) {
  margin-top: 2rem;
}

.product .diagram img {
  display: none;
  width: 100%;
  max-width: 42rem;
}

.product .diagram .text-box {
  position: relative;
}

.product .diagram .feature-name {
  z-index: 2;
  position: absolute;
  top: -2rem;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 4rem;
  font-size: 2.4rem;
  font-weight: 700;
  color: #fff;
}

.product .diagram .text-box p {
  position: relative;
  margin-top: 2rem;
  padding: 3.2rem 1.6rem 1.6rem;
  border: .1rem solid rgba(0, 0, 0, .2);
  font-size: 2rem;
}

.product .diagram .layer-core .feature-name {
  background-color: #3251A1;
}

.product .diagram .layer-engine .feature-name {
  background-color: #5BB0FF;
}

.product .diagram .layer-extension .feature-name {
  background-color: #086E59;
}

.product .diagram .layer-addon .feature-name {
  background-color: #4C086E;
}

.product .feature .section-tit {
  margin-bottom: 8rem;
}

.product .feature .section-tit h4 {
  text-align: center;
  font-size: 4rem;
}

.product .feature .side-bar {
  margin-bottom: 2.4rem;
}

.product .feature .side-bar ul {
  overflow-x: scroll;
  display: flex;
  justify-content: center;
  gap: .8rem;
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.product .feature .side-bar ul::-webkit-scrollbar {
  display: none;
}

.product .feature .side-bar li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  min-width: 18rem;
  height: 6.4rem;
  padding: 0 2rem;
  border-radius: .8rem;
  background-color: #F2F2F2;
  white-space: nowrap;
  font-size: 2rem;
  color: rgba(0, 0, 0, .48);
  transition: all .5s ease;
}

.product .feature .side-bar li:hover {
  color: #3251A1;
}

.product .feature .side-bar li.active {
  background-color: #3251A1;
  color: #fff;
}

.product .feature .side-bar li.active::after {
  content: "";
  display: block;
  width: 2.4rem;
  height: 2.4rem;
  background: url(../source/images/icon_checkbox.svg) no-repeat center / 100%;
}

.product .feature-list {
  display: grid;
  /* grid-template-columns: repeat(3, 1fr); */
  gap: 20px;
  flex-grow: 1;
}

/* 개별 아이템 카드 */
.product .feature-list .list-item {
  background: #fff;
  border-radius: 12px;
  border: 1px solid #eef1f5;
  overflow: hidden;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
  border: .1rem solid transparent;
  display: flex;
  flex-direction: column;
  transition: all .3s ease;
}

.product .feature-list .list-item:hover {
  border-color: #3251A1;
  box-shadow: 0 10px 20px #3251a13c;
}

.product .feature-list .img-box {
  display: flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  height: fit-content;
  background: #eef3ff;
}

.product .feature-list .img-box img {
  display: block;
  width: 100%;
  aspect-ratio: 16/9;
}

.product .feature-list .text-box {
  padding: 20px;
  flex-grow: 1;
}

.product .feature-list .item-title {
  font-size: 1.1rem;
  margin-bottom: 15px;
  color: #222;
  border-bottom: 1px solid #f0f0f0;
  padding-bottom: 10px;
}

.product .feature-list .text-box ul {
  margin: 0;
}

.product .feature-list .item-title strong {
  font-size: 2rem;
  font-weight: 700;
}

.product .feature-list .list-item:hover .item-title strong {
  color: #3251A1;
}

.product .feature-list .text-box li {
  margin-bottom: 8px;
  word-break: keep-all;
  line-height: 1.6;
  font-size: 1.6rem;
  color: #555;
}

.product .feature-list .text-box li::before {
  content: "";
  position: relative;
  top: -.4rem;
  left: 0;
  display: inline-block;
  width: .3rem;
  height: .3rem;
  margin-right: .8rem;
  border-radius: 50%;
  background: rgba(0, 0, 0, .48);
}

@media all and (min-width: 48em) {
  .product .feature-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media all and (min-width: 64em) {
  .product .diagram .section-tit span {
    font-size: 3.2rem;
  }

  .product .diagram .section-tit h4 {
    font-size: 4.8rem;
  }

  .product .diagram .stack-wrapper {
    flex-direction: column-reverse;
  }

  .product .diagram .stack-wrapper .layer {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 4rem;
  }

  .layer {
    opacity: 0;
    animation-duration: 10s;
    animation-iteration-count: infinite;
    animation-fill-mode: forwards;
  }

  .layer-core {
    animation-name: stack-core;
  }

  .layer-engine {
    animation-name: stack-engine;
  }

  .layer-extension {
    animation-name: stack-extension;
  }

  .layer-addon {
    animation-name: stack-addon;
  }

  @keyframes stack-core {
    0% {
      opacity: 0;
      transform: translateY(20px);
    }

    5%,
    90% {
      opacity: 1;
      transform: translateY(0);
    }

    95%,
    100% {
      opacity: 0;
    }
  }

  @keyframes stack-engine {

    0%,
    10% {
      opacity: 0;
      transform: translateY(20px);
    }

    15%,
    90% {
      opacity: 1;
      transform: translateY(0);
    }

    95%,
    100% {
      opacity: 0;
    }
  }

  @keyframes stack-extension {

    0%,
    20% {
      opacity: 0;
      transform: translateY(20px);
    }

    25%,
    90% {
      opacity: 1;
      transform: translateY(0);
    }

    95%,
    100% {
      opacity: 0;
    }
  }

  @keyframes stack-addon {

    0%,
    30% {
      opacity: 0;
      transform: translateY(20px);
    }

    35%,
    90% {
      opacity: 1;
      transform: translateY(0);
    }

    95%,
    100% {
      opacity: 0;
    }
  }

  .product .diagram .stack-wrapper .layer.layer-extension,
  .product .diagram .stack-wrapper .layer.layer-engine,
  .product .diagram .stack-wrapper .layer.layer-core {
    margin-top: -12rem;
  }

  .product .diagram img {
    display: block;
  }

  .product .diagram .text-box {
    max-width: 52.4rem;
    margin-top: 6rem;
  }

  .product .diagram .feature-name {
    top: 0;
    width: 16rem;
  }

  .product .diagram .feature-name::before {
    content: "";
    position: absolute;
    left: -80%;
    top: 50%;
    display: block;
    width: 80%;
    border-bottom: .1rem dashed transparent;
  }

  .product .diagram .layer-core .feature-name::before {
    border-color: #3251A1;
  }

  .product .diagram .layer-engine .feature-name::before {
    border-color: #2878C2;
  }

  .product .diagram .layer-extension .feature-name::before {
    border-color: #086E59;
  }

  .product .diagram .layer-addon .feature-name::before {
    border-color: #4C086E;
  }

  .product .diagram .feature-name::after {
    content: "";
    position: absolute;
    left: -80%;
    top: 50%;
    display: block;
    width: .7rem;
    height: .7rem;
    border-radius: 50%;
    background-color: transparent;
    transform: translateY(-50%);
  }

  .product .diagram .layer-core .feature-name::after {
    background-color: #3251A1;
  }

  .product .diagram .layer-engine .feature-name::after {
    background-color: #2878C2;
  }

  .product .diagram .layer-extension .feature-name::after {
    background-color: #086E59;
  }

  .product .diagram .layer-addon .feature-name::after {
    background-color: #4C086E;
  }

  .product .diagram .text-box p {
    margin-left: 1rem;
  }

  .product .feature .section-tit h4 {
    font-size: 6.4rem;
  }
}

@media all and (min-width: 80em) {
  .product .diagram img {
    max-width: 48rem;
  }

  .product .diagram .stack-wrapper .layer.layer-extension,
  .product .diagram .stack-wrapper .layer.layer-engine,
  .product .diagram .stack-wrapper .layer.layer-core {
    margin-top: -16rem;
  }
}

@media all and (min-width: 96em) {
  .product .intro .inner {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
  }

  .product .intro .section-tit {
    align-items: flex-start;
  }

  .product .intro h4 {
    font-size: 6.4rem;
  }

  .product .intro .section-tit p,
  .product .intro .section-tit span {
    text-align: left;
    line-height: 1.3;
    font-size: 3.6rem;
  }

  .product .intro-group:not(:last-child) {
    border-bottom: .1rem dashed rgba(0, 0, 0, .2);
  }

  .product .intro-header p {
    flex-direction: row;
    gap: 2rem;
  }

  .product .intro-body p {
    text-align: left;
  }

  .product .diagram .section-tit span {
    font-size: 4rem;
  }

  .product .diagram .section-tit h4 {
    font-size: 6.4rem;
  }

  .product .diagram .section-tit p {
    font-size: 2.4rem;
  }

  .product .feature .section-content {
    display: flex;
    gap: 4rem;
  }

  .product .feature .side-bar ul {
    position: sticky;
    top: 16rem;
    flex-direction: column;
  }

  .product .feature-list:not(.engine, .add-on) {
    grid-template-columns: repeat(3, 1fr);
  }
}