/* section1 */
#intro-section1 {
    width: 100%;
    background: linear-gradient(#FFF 70%, #222D52 30%);
    display: flex;
    padding: 100px 0;
    flex-direction: column;
    align-items: center;
    gap: 72px;
}

.st1-container {
    max-width: 1280px;
    width: 90%;
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: 42px;
}

.st1-box {
    width: calc(50% - 21px);
    height: 300px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 20px;
    align-self: stretch;
    background: #FFF;
    position: relative;
    box-shadow: 0 0 0 rgba(0,0,0,0);
    transition: box-shadow 0.3s ease;
}

.st1-box::before {
    content: "";
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
    box-shadow: 0 16px 24px 0 rgba(0, 0, 0, 0.10);
    opacity: 0;
    transition: opacity 0.1s;
    z-index: -1;
}

.st1-box:hover::before {
    opacity: 1;
    transition: 0.1s;
}

.st1-box-div {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.st1-box p {
    color: #111;
    text-align: center;
    font-size: 40px;
    font-weight: 600;
    line-height: 130%; /* 52px */
    letter-spacing: -1px;
}

.st1-box div {
    color: #505050;
    text-align: center;
    font-size: 20px;
    font-weight: 400;
    line-height: 150%; /* 30px */
    letter-spacing: -0.5px;
    word-break: keep-all;
}


/* section2 */
#intro-section2 {
    width: 100%;
    background: #222D52;
    display: flex;
    box-sizing: border-box;
    padding: 55px 0 110px;
    flex-direction: column;
    align-items: center;
    gap: 72px;
    margin-top: -2px;
}

.st2-container {
    max-width: 1280px;
    width: 90%;
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 42px;
}

.st2-box {
    width: calc(33.3% - 28px);
    /* border: 2px solid #FFF; */
    padding: 2px;
    background: rgba(255, 255, 255, 0.10);
    display: flex;
    box-sizing: border-box;
    padding: 40px 24px;
    flex-direction: column;
    align-items: center;
    gap: 32px;
    align-self: stretch;
    position: relative;
}

.st2-box::before {
  content: "";
  position: absolute;
  inset: 0; /* top, right, bottom, left 전부 0 */
  padding: 2px; /* border 두께 */
  border-radius: inherit;
  background: linear-gradient(180deg, #fff 0%, rgba(255,255,255,0.1) 100%);
  -webkit-mask: 
    linear-gradient(#fff 0 0) content-box, 
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  z-index: -1;
}

.st2-box-div {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    align-self: stretch;
}

.st2-box-div p:first-child {
    color: #FFF;
    text-align: center;
    font-size: 40px;
    font-weight: 600;
    line-height: 140%; /* 56px */
    letter-spacing: -1px;
}

.st2-box-div p:last-child {
    color: #FFF;
    text-align: center;
    font-size: 28px;
    font-weight: 600;
    line-height: 140%; /* 39.2px */
    letter-spacing: -0.7px;
    word-break: keep-all;
}

.st2-box hr {
    width: 120px;
    height: 3px;
    background: #FFF;
    border: none;
}

.st2-box-content {
    color: #FFF;
    text-align: center;
    font-size: 20px;
    font-weight: 400;
    line-height: 150%; /* 30px */
    letter-spacing: -0.5px;
    word-break: keep-all;
}


/* section3 */
#intro-section3 {
    width: 100%;
    background: #F0F0F0;
    display: flex;
    box-sizing: border-box;
    padding: 110px 0;
    flex-direction: column;
    align-items: center;
    gap: 72px;
    align-self: stretch;
}

.st3-container {
    max-width: 1280px;
    width: 90%;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.expert-swiper {
    width: calc(100% - 140px);
    overflow: hidden;
}

.expert-swiper .swiper-wrapper {
    align-items: stretch;
}

.expert-swiper .swiper-slide {
    height: auto;
}

.expert-slide {
    width: 100%;
    height: 100%;
    display: flex;
    box-sizing: border-box;
    padding: 40px 30px;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    background: #FFF;
}

.expert-slide-wrap {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 40px;
}

.expert-slide-wrap img {
    width: 200px;
}

.expert-slide-div {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
}

.expert-slide-div div {
    color: #191919;
    font-size: 40px;
    font-weight: 600;
    line-height: 130%;
    letter-spacing: -1px;
}

.expert-slide-div div span {
    font-size: 24px;
    letter-spacing: -0.6px;
}

.expert-slide-div p {
    color: #505050;
    font-size: 18px;
    font-weight: 600;
    line-height: 130%; /* 23.4px */
    letter-spacing: -0.45px;
}

.expert-slide hr {
    width: 100%;
    height: 1px;
    background: rgba(0, 0, 0, 0.10);
    flex-shrink: 0;
}

.expert-record {
    width: 100%;
    display: flex;
    box-sizing: border-box;
    padding-left: 20px;
    justify-content: flex-start;
    align-items: center;
    color: #505050;
    font-size: 18px;
    font-weight: 400;
    line-height: 200%; /* 36px */
    letter-spacing: -0.45px;
    border-left: 4px solid #234EEA;
    word-break: keep-all;
}

.expert-content {
    width: 100%;
    color: #767676;
    font-size: 16px;
    font-weight: 400;
    line-height: 125%; /* 20px */
    letter-spacing: -0.4px;
    word-break: keep-all;
}

.expert-nav-wrap {
  width: 100%;
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  justify-content: space-between;
  align-items: center;
  pointer-events: none;
}

.nav-btn {
  opacity: 0.3;
  cursor: pointer;
  z-index: 3;
  pointer-events: auto;
  transition: 0s;
}

.nav-btn:hover {
  opacity: 1;
  transition: 0s;
}


@media(max-width: 1400px) {
    .st2-box-div p:first-child {
        font-size: 32px;
        letter-spacing: -0.8px;
    }
    .st2-box-div p:last-child {
        font-size: 24px;
        letter-spacing: -0.6px;
    }
    .st2-box-content {
        font-size: 18px;
        letter-spacing: -0.45px;
    }
}

@media(max-width: 1280px) {
    #intro-section1, #intro-section3 {
        padding: 90px 0;
        gap: 60px;
    }
    .st1-container {
        gap: 30px;
    }
    .st1-box {
        width: calc(50% - 15px);
    }
    .st1-box p {
        font-size: 32px;
        letter-spacing: -0.8px;
    }
    .st1-box div {
        font-size: 18px;
        letter-spacing: -0.45px;
    }
    #intro-section2 {
        gap: 60px;
    }
    .st2-container {
        gap: 20px;
    }
    .st2-box {
        padding: 24px 12px;
        width: calc(33.3% - 13.3px);
        gap: 20px;
    }
    .st2-box-div p:first-child {
        font-size: 28px;
        letter-spacing: -0.7px;
    }
    .st2-box-div p:last-child {
        font-size: 20px;
        letter-spacing: -0.5px;
    }
    .st2-box-content {
        font-size: 16px;
        letter-spacing: -0.4px;
    }
    .expert-slide-wrap img {
        width: 185px;
    }
    .expert-slide-div div span {
        font-size: 20px;
        letter-spacing: -0.5px;
    }
    .expert-slide-div div {
        font-size: 32px;
        letter-spacing: -0.8px;
    }
    .expert-slide-div p, .expert-record {
        font-size: 16px;
        letter-spacing: -0.4px;
    }
    .expert-content {
        font-size: 14px;
        letter-spacing: -0.35px;
    }
}

@media(max-width: 1024px) {
    .st1-container {
        gap: 15px;
    }
    .st1-box {
        width: calc(50% - 7.5px);
    }
    .st2-container {
        flex-wrap: wrap;
    }
    .st2-box {
        width: calc(50% - 10px);
    }
    .expert-nav-wrap .nav-btn {
        width: 40px;
        height: 40px;
    }
    .expert-swiper {
        width: calc(100% - 120px);
    }
}

@media(max-width: 900px) {
    #intro-section1, #intro-section3 {
        padding: 80px 0;
        gap: 50px;
    }
    .st1-box  {
        height: 275px;
    }
    .st1-box .box-img {
        width: 70px;
    }
    .st1-box p {
        font-size: 28px;
        letter-spacing: -0.7px;
    }
    .st1-box div {
        font-size: 16px;
        letter-spacing: -0.4px;
    }
    #intro-section2 {
        gap: 50px;
    }
    .st3-container {
        flex-direction: column;
        gap: 16px;
    }
    .expert-swiper {
        width: 100%;
    }
    .expert-slide {
        padding: 30px 20px;
    }
    .expert-slide-wrap {
        gap: 30px;
    }
    .expert-slide-wrap img {
        width: 170px;
    }
    .expert-nav-wrap {
        transform: none;
        position: static;
        gap: 20px;
        justify-content: center;
    }
}

@media(max-width: 768px) {
    #intro-section1, #intro-section3 {
        padding: 70px 16px;
        gap: 40px;
    }
    .st1-container {
        width: 100%;
    }
    #intro-section2 {
        gap: 40px;
    }
    .st2-container {
        width: 92%;
        gap: 8px;
    }
    .st2-box {
        width: calc(50% - 4px);
    }
    .st3-container {
        width: 100%;
    }
    .expert-record {
        padding-left: 12px;
    }
}

@media(max-width: 650px) {
    #intro-section1 {
        background: linear-gradient(#FFF 53%, #222D52 47%);
    }
    .st1-container {
        flex-direction: column;
        gap: 8px;
    }
    .st1-box {
        width: 100%;
        flex-direction: row;
        padding: 24px 16px;
        height: auto;
    }
    .st1-box .box-img {
        width: 80px;
    }
    .st1-box-div {
        gap: 16px;
        align-items: flex-start;
    }
    .st1-box p {
        font-size: 24px;
        letter-spacing: -0.6px;
    }
    .st1-box div {
        text-align: left;
    }
    .st2-box {
        width: 100%;
    }
    .st2-box-div p:first-child {
        font-size: 24px;
        letter-spacing: -0.6px;
    }
    .st2-box-div p:last-child {
        font-size: 18px;
        letter-spacing: -0.45px;
    }
    .expert-slide {
        padding: 20px 16px;
    }
    .expert-slide-wrap {
        gap: 20px;
    }
    .expert-slide-wrap img {
        width: 150px;
    }
    .expert-slide-div div {
        font-size: 28px;
        letter-spacing: -0.7px;
    }
    .expert-slide-div div span {
        font-size: 18px;
        letter-spacing: -0.45px;
    }
}

@media(max-width: 480px) {
    .st1-box br {
        display: none;
    }
    .expert-slide-div div {
        font-size: 24px;
        letter-spacing: -0.6px;
    }
    .expert-slide-div div span {
        font-size: 16px;
        letter-spacing: -0.4px;
    }
    .expert-slide-div p, .expert-record {
        font-size: 14px;
        letter-spacing: -0.35px;
    }
}

@media(max-width: 400px) {
   .expert-slide-div div {
        font-size: 20px;
        letter-spacing: -0.5px;
    }
    .expert-slide-div div span {
        font-size: 14px;
        letter-spacing: -0.35px;
    }
}

@media(max-width: 370px) {
    .st1-box .box-img {
        width: 65px;
    }
    .st1-box-div {
        gap: 12px;
    }
    .st1-box p {
        font-size: 20px;
        letter-spacing: -0.5px;
    }
    .st1-box div {
        font-size: 14px;
        letter-spacing: -0.35px;
    }
    .st2-box-content {
        font-size: 14px;
        letter-spacing: -0.35px;
    }
    .expert-slide-wrap img {
        width: 120px;
    }
}