@charset "utf-8";

/* 상단 링크박스 수정 */
[data-link-section] {
  display: inline-block;
  position: absolute;
  top: 158px;
  user-select: none;
}
[data-link-button] {
  width: 100%;
  display: flex;
  justify-content: start;
  align-items: center;
  margin: 2px 4px;
  gap: 24px;
  text-align: left;
  font-size: 38px;
  line-height: 130%;
  letter-spacing: -0.5%;
  font-weight: 900;
  color: white;
  cursor: pointer;
}
[data-link-rotation-arrow] {
  font-size: 12px;
  transition: 0.3s;
}
[data-link-section].on [data-link-rotation-arrow] {
  transform: rotate(180deg);
}
[data-link-box] {
  display: none;
  position: absolute;
  top: 66px;
  right: 0;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 8px;
  width: fit-content;
  margin-top: 1px;
  background-color: black;
  border-radius: 10px;
  padding: 8px;
}
[data-link-section].on [data-link-box] {
  display: flex;
}
[data-link-list] {
  color: #c1c1c1;
  cursor: pointer;
  border-radius: 8px;
  white-space: nowrap;
  font-size: 28px;
  line-height: 130%;
  letter-spacing: -0.5%;
  font-weight: 500;
  padding: 12px 6px;
}
[data-link-list]:hover {
  color: white;
}

@media (max-width: 768px) {
  [data-link-section] {
    top: 93px;
  }
  [data-link-button] {
    gap: 5px;
    font-size: 24px;
  }
  [data-link-box] {
    top: 38px;
  }
  [data-link-list] {
    font-size: 18px;
  }
}
/* 상단 링크박스 수정 끝 */

#myVideo {
  position: absolute;
  right: 0;
  top: 0;
  /* top: 69px; */
  min-width: 100%;
  min-height: 100%;
}

#myVideo video {
  position: absolute;
  height: 100%;
  width: 100%;
  object-fit: cover;
}

.gradient {
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  content: " ";
  z-index: 1;
  backface-visibility: hidden;
  background: linear-gradient(
    to bottom,
    rgba(20, 20, 20, 0) 0,
    rgba(20, 20, 20, 0.78) 76%,
    #141414
  );
}

.gradient2 {
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  content: " ";
  z-index: 1;
  backface-visibility: hidden;
  background: linear-gradient(
    to left,
    rgba(20, 20, 20, 0) 40%,
    rgba(20, 20, 20, 0.78) 76%,
    #141414
  );
}

.smart-main {
  background: #141414;
  padding-bottom: 64px;
}

.smart-main-color {
  background-color: #141414;
}

.smart_section2 {
  width: 1260px;
  margin: 0 auto;
  height: 100%;
  /* overflow: hidden; */
  position: relative;
  left: 0;
  top: -59px;
  z-index: 2;
}

.smart_section1 {
  min-width: 1260px;
  margin: 0 auto;
  position: relative;
  height: 641px;
}

.smart_section1 .text {
  padding-top: 241px;
}

.smart_section1 .text h3 {
  font-weight: 500;
  font-size: 35px;
  line-height: 1.28;
  letter-spacing: -1.8px;
  text-align: left;
  color: #fff;
  margin-bottom: 0;
  text-shadow: 3px 3px 5px rgba(0, 0, 0, 0.3);
}

.smart_section1 p {
  font-weight: normal;
  font-size: 20px;
  line-height: 1.67;
  letter-spacing: -0.6px;
  margin-top: 15px;
  text-align: left;
  color: #eaeaea;
}

.smart_header {
  position: relative;
  width: 1260px;
  margin: 0 auto;
  color: #f1f1f1;
  z-index: 3;
}

.smart_header .left-tab,
.smart_header .right-tab {
  margin-top: 110px;
}

/* 2022-08-04 추가 */
.smart_header > .left-tab {
  margin-top: 140px;
}
.smart_header > .text {
  padding-top: 271px;
}
/********************/

.smart_header .right-tab {
  display: flex;
  justify-content: flex-start;
}

.smart_header .left-tab select {
  cursor: pointer;
  border: 0;
  font-size: 38px;
  font-weight: bold;
  line-height: 1.47;
  letter-spacing: -0.95px;
  color: #ffffff;
  width: 176px;
  font-family: inherit;
  background: url("../img/common/drop_down_lg.png") no-repeat 95% 50%;
  background-size: 12px 12px;
  border-radius: 0px;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}

.smart_header .cs-select:focus,
.smart_header .cs-select:visited {
  outline: 0;
  box-shadow: 0;
}

select::-ms-expand {
  display: none;
}

.smart_header .right-tab select {
  width: auto;
  flex-grow: 1;
  font-size: 14px;
  line-height: 1.43;
  letter-spacing: -0.35px;
  color: #ffffff;
  border: solid 1px #ffffff;
  padding: 6px;
  box-shadow: 20px 20px 60px 0 rgba(0, 0, 0, 0.16);
  background: RGB(92, 92, 92, 0.4) url("../img/common/drop_down.png") no-repeat
    95% 50%;
  background-size: 8px 8px;
  border-radius: 0px;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  margin-right: 10px;
  cursor: pointer;
}

.smart_header .right-tab select:last-child {
  margin-right: 0;
}

.smart_section2 .accordion_section:first-child .text {
  padding-top: 0;
}

.smart_section2 .text {
  text-align: left;
  padding-top: 30px;
}

.smart_section2 .text h4 {
  font-size: 24px;
  font-weight: bold;
  line-height: 1.5;
  letter-spacing: -0.6px;
  color: #ffffff;
  display: inline-block;
  vertical-align: sub;
  margin-bottom: 0;
}

.smart_section2 .text .see-more {
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: -0.4px;
  text-align: left;
  color: #cccccc;
  display: inline-block;
  padding-left: 6px;
  cursor: pointer;
}

.smart_section2 .text .btn.see-more {
  outline: 0;
  box-shadow: none;
}

.smart_section2 .text .see-more img {
  padding-left: 10px;
}
.smart-wrap {
  position: relative;
}

.sd_Gbg {
  position: absolute;
  top: 0;
  left: 0;
  width: 306px;
  height: 216px;
  font-size: 0;
  background-image: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0) 25%,
    #000000 94%
  );
}

.smart-img {
  position: absolute;
  top: 0;
  left: 0;
  border-radius: 0;
  overflow: hidden;
  width: 306px;
  height: 216px;
}

.smart-img img {
  width: 100%;
  height: 100%;
  vertical-align: middle;
}
.smart-text {
  text-align: left;
  position: absolute;
  left: 20px;
  top: 170px;
}

.smart-text h6,
.smart-text p {
  color: #ffffff;
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: -0.4px;
  display: inline-block;
}

.smart_section2 .swiper-slide {
  width: 210px;
  height: 298px;
}

.see-more-card {
  background: #141414;
  padding: 0;
}
.see-more-card img {
  width: 100%;
}
.see-more-card .m-smart-bg {
  display: none;
}

.see-more-text {
  position: absolute;
  top: 125px;
  width: 100%;
}

.see-more-text h3 {
  font-size: 28px;
  font-stretch: normal;
  font-style: normal;
  line-height: 1.57;
  font-weight: 300;
  letter-spacing: -0.7px;
  text-align: center;
  color: #ffffff;
  text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.3);
}

.seemore_Gbg {
  opacity: 0.73;
  background-color: #000000;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  font-size: 0;
}

.smart_section2 .swiper-container {
  margin-top: 15px;
}

.smart_section2 .swiper-slide .text {
  width: 100%;
  padding-top: 26px;
  padding-left: 0;
  text-align: center;
}

.smart_section2 .swiper-slide .text h6 {
  font-size: 14px;
}

.smart_section2 .swiper-slide .text h3 {
  font-size: 26px;
  margin-top: 10px;
}

.smart_section2 .swiper-slide .text p {
  font-size: 14px;
  line-height: 1.3em;
}

.smart_section2 .swiper-slide .text a {
  font-family: "Noto Sans CJK KR";
  font-size: 18px;
  line-height: 28px;
  background: #0e71eb;
  border-radius: 15px;
  margin-top: 0px;
  font-size: 14px;
  width: 140px;
  height: 30px;
  position: absolute;
  bottom: 26px;
  left: 50%;
  margin-left: -70px;
}

.smart_section2 .swiper-slide .img {
  position: absolute;
  right: auto;
  left: 50%;
  bottom: 56px;
  transform: translateX(-50%);
  width: 176px;
}

.smart_section2 .swiper-slide .img img {
  width: 100%;
}
.smart_section2 .swiper-slide {
  position: relative;
}

.smart_section2 .swiper-slide h3 {
  font-size: 18px;
  line-height: 1.5em;
  padding: 24px;
}

.smart_section2 .swiper-slide .img {
  position: absolute;
  right: auto;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 306px;
}

.smart_section2 .swiper-slide .img img {
  width: 100%;
}
.smart_section2 .swiper-pagination {
  bottom: 30px;
}

.smart_section2 .swiper-pagination-bullet {
  margin: 0 5px;
}

.slider-produtos-wrap {
  position: relative;
  width: 1260px;
  margin: 0 auto;
  margin-top: 15px;
}
/* .slider-produtos-wrap::after {
    content: "";
    display: block;
    width: 31px;
    height: 300px;
    right: 0;
    top: 0;
    position: absolute;
    z-index: 1;
    background-image: linear-gradient(to right, rgba(0, 0, 0, 0) 25%, #000000 94%);
} */

.slider-produtos-wrap .swiper-slide {
  z-index: 1;
}

.smart_section2 .swiper-button-next {
  background: url("../img/common/next-circle-arrow_on.png") no-repeat;
  width: 42px;
  height: 42px;
  /* right: -24px; */
  left: auto;
}

.smart_section2 .swiper-button-next:after,
.smart_section2 .swiper-button-prev:after {
  font-size: 0;
}
.smart_section2 .swiper-button-next:focus,
.smart_section2 .swiper-button-prev:focus {
  outline: none;
  outline: 0;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

.smart_section2 .swiper-button-next.swiper-button-disabled {
  background: url("../img/common/next-circle-arrow_off.png") no-repeat;
  opacity: 1;
}

.smart_section2 .swiper-button-prev {
  background: url("../img/common/prev-circle-arrow_on.png") no-repeat;
  width: 42px;
  height: 42px;
  /* left: -24px; */
  right: auto;
}

.smart_section2 .swiper-button-prev.swiper-button-disabled {
  background: url("../img/common/prev-circle-arrow_off.png") no-repeat;
  opacity: 1;
}

/* smart detail */
.detail_section {
  width: 1260px;
  margin: 0 auto;
  position: relative;
  top: 69px;
  height: 100%;
  overflow: hidden;
}

.smart-main-color .video_bg {
  position: relative;
  width: 100%;
  height: 640px;
  margin: 0 auto;
  top: 69px;
  background: #000;
  overflow: hidden;
}

.video_bg video {
  width: 100%;
  height: 100%;
}

.video_text {
  position: relative;
  padding: 0 0 120px;
  width: 100%;
  height: 100%;
  margin: 0 auto;
}

.chapter__bx {
  padding-top: 50px;
}

.chapter {
  width: 76px;
  height: 34px;
  background-color: #252525;
  font-size: 16px;
  font-weight: normal;
  line-height: 2;
  letter-spacing: -0.4px;
  text-align: center;
  color: #b72933;
  padding: 5px 22px;
}

.sir {
  font-size: 16px;
  line-height: 2;
  letter-spacing: -0.4px;
  text-align: left;
  color: #999999;
}

.study_subject {
  padding: 13px 0 4px;
  font-size: 30px;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: -0.75px;
  text-align: left;
  color: #ffffff;
}

.sub_subject {
  margin-bottom: 60px;
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: -0.4px;
  text-align: left;
  color: #666666;
}

.lecture_list > li.active {
  border-bottom: 3px solid #b72933;
}

.lecture_list > li {
  cursor: pointer;
  margin-right: 40px;
  padding-bottom: 19px;
  font-size: 18px;
  text-align: center;
  color: #fff;
}

.clear:after {
  content: "";
  clear: both;
  display: block;
}

.chapter_list h4 {
  font-size: 20px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.5px;
  text-align: left;
  color: #ffffff;
  float: left;
  padding-right: 63px;
}

.chapter_tt h4 {
  font-size: 20px;
  line-height: 1;
  letter-spacing: -0.5px;
  text-align: left;
  color: #ffffff;
}

.chapter_tt {
  position: sticky;
  padding: 18px 0 17px 60px;
  font-size: 20px;
  font-weight: 400;
  color: #fff;
  border-top: 1px solid #262626;
  transition: all 0.3s cubic-bezier(0.19, 1, 0.22, 1);
}

.chapter_list li {
  padding: 40px 60px;
  border-top: 1px solid #262626;
}

.chapter_list li:last-child {
  border-bottom: 1px solid #262626;
}

.chapter_list p {
  color: #fff;
}

.chapter_info > ul > li {
  padding: 43px 58px;
  border-top: 1px solid #262626;
  background-color: #101010;
}

.studying_btn p {
  color: #666666;
  font-size: 14px;
  line-height: 1.43;
  letter-spacing: -0.35px;
}

.studying_btn span {
  color: #999999;
  font-size: 14px;
  line-height: 1.43;
  letter-spacing: -0.35px;
}

.wrap .tab_wrap .tab_content {
  display: none;
}

.description {
  padding: 22px 60px;
  border-top: 1px solid #262626;
}

.m-book_icon {
  display: none;
}

.pc-book_icon {
  display: inline-block;
}

.book {
  margin-right: 40px;
}

.book_text h4 {
  margin-top: 40px;
  font-size: 24px;
  font-weight: 500;
  color: #fff;
}

.book_text > div:nth-child(2) {
  margin: 25px 0 14px;
}

.book_title_sub {
  margin-right: 10px;
  font-size: 16px;
  font-weight: 400;
  color: #fff;
}

.book_txt_sub {
  font-size: 16px;
  font-weight: 400;
  color: #999999;
}

.sd_Icon_img,
.sd_Icon_img2,
.sd_Icon_img3 {
  position: absolute;
  width: 210px;
  height: 295px;
  top: 0;
  left: 0;
  border-radius: 0 0 16px 16px;
  overflow: hidden;
}

.smart_slide2 {
  margin: 0 19px 16px 0;
}

.sd_Box {
  float: left;
  cursor: pointer;
  overflow: hidden;
  position: relative;
  padding: 0 20px;
  width: 210px;
  height: 298px;
  border-radius: 10px;
}
.sd_Icon_img img,
.sd_Icon_img2 img,
.sd_Icon_img3 img {
  width: 100%;
}
.sd_Icon_img2 img {
  position: absolute;
  top: 89px;
  left: 50%;
  transform: translateX(-50%);
}
.sd_Gbg {
  position: absolute;
  top: 0;
  left: 0;
  width: 210px;
  height: 298px;
  font-size: 0;
  background-image: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0) 50%,
    #000000 90%
  );
}
.kor_bg {
  background: RGB(221, 241, 254);
}
.math_bg {
  background: RGB(222, 255, 241);
}
.eng_bg {
  background: RGB(255, 246, 222);
}
.sosi_bg {
  background: RGB(254, 255, 222);
}
.hist_bg {
  background: RGB(255, 222, 222);
}
.scne_bg {
  background: RGB(235, 222, 255);
}
.sd_Txt1 {
  position: absolute;
  width: 100%;
  left: 16px;
  bottom: 67px;
  margin: 0;
  font-size: 20px;
  line-height: 1;
  color: #fff;
}
.sd_Txt2 {
  position: absolute;
  left: 0;
  width: 100%;
  bottom: 20px;
  overflow: hidden;
  height: 35px;
  font-size: 14px;
  line-height: 1.3;
  color: rgba(255, 255, 255, 0.6);
  text-overflow: ellipsis;
  white-space: normal;
  word-wrap: break-word;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  padding: 0 16px;
}
.sir1 {
  background-color: #def2ff;
}

.smart_header .last-select {
  display: none;
}

.opacity {
  opacity: 0;
}

.btn {
  display: inline-block;
  font-weight: 400;
  color: #212529;
  text-align: center;
  vertical-align: middle;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  background-color: transparent;
  border: 1px solid transparent;
  padding: 0.375rem 0.75rem;
  font-size: 1rem;
  line-height: 1.5;
  border-radius: 0.25rem;
  transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out,
    border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}
#tabs1,
#tabs2,
#tabs3,
#tabs4,
#tabs5,
#tabs6 {
  float: right;
  font-size: 0;
}
#tabs1 > li:last-child::after,
#tabs2 > li:last-child::after,
#tabs3 > li:last-child::after,
#tabs4 > li:last-child::after,
#tabs5 > li:last-child::after,
#tabs6 > li:last-child::after {
  display: none;
}

.tabLink {
  cursor: pointer;
  font-size: 24px;
  line-height: 1;
  letter-spacing: -0.6px;
  color: #cccccc;
  display: inline-block;
  vertical-align: sub;
}
.tabLink::after {
  content: "";
  display: inline-block;
  margin: 0px 20px 2px;
  width: 1px;
  height: 15px;
  background: #cccccc;
}

.tabLink.current {
  font-weight: bold;
  color: #fff;
}

.tabContent {
  display: none;
}
.tabContent.current {
  display: inherit;
}

/* 
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
모바일 영역 모바일 영역 모바일 영역 모바일 영역 모바일 영역 모바일 영역 
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
*/
@media (max-width: 767px) {
  .swiper-slide br {
    display: none;
  }

  .slider-produtos-wrap {
    position: relative;
    width: 100%;
    margin: 0 auto;
    margin-top: 15px;
  }
  .smart-main {
    background: none;
  }
  .smart_header .left-tab select {
    font-size: 24px;
    font-weight: bold;
    font-stretch: normal;
    font-style: normal;
    line-height: 1.5;
    letter-spacing: -0.6px;
    text-align: left;
    color: #ffffff;
    cursor: pointer;
    border: 0;
    width: 105px;
  }

  .smart_header .left-tab {
    margin-top: 88px;
  }

  .smart_section1 .text {
    padding-top: 145px;
    padding-bottom: 5px;
  }

  .smart_section1 .text h3 {
    font-size: 19px;
    letter-spacing: -0.95px;
    line-height: 1.37;
    text-align: left;
    color: #fff;
    margin-bottom: 0;
    text-shadow: 3px 3px 5px rgba(0, 0, 0, 0.3);
  }

  .smart_section1 p {
    font-size: 12px;
    letter-spacing: -0.3px;
    line-height: 2.08;
    margin-top: 12px;
    text-align: left;
    color: #eaeaea;
  }

  .smart_header .right-tab {
    display: none;
  }
  .smart_header .last-select {
    display: block;
    justify-content: flex-start;
    margin-top: 91px;
  }
  .smart_header .left-tab {
    margin-top: 88px;
  }

  .smart_header .last-select select {
    width: 100%;
    flex-grow: 1;
    font-size: 14px;
    line-height: 1.43;
    letter-spacing: -0.35px;
    color: #ffffff;
    border: solid 1px #ffffff;
    padding: 7px;
    box-shadow: 20px 20px 60px 0 rgba(0, 0, 0, 0.16);
    background: RGB(92, 92, 92, 0.4) url(../img/common/drop_down.png) no-repeat
      95% 50%;
    background-size: 8px 8px;
    border-radius: 0px;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    margin-right: 4px;
    cursor: pointer;
  }
  .smart_header .last-select select:last-child {
    margin-right: 0;
  }
  .smart_header .left-tab select {
    font-size: 24px;
    font-weight: bold;
    font-stretch: normal;
    font-style: normal;
    line-height: 1.5;
    letter-spacing: -0.6px;
    text-align: left;
    color: #ffffff;
    cursor: pointer;
    border: 0;
    width: 105px;
    background: url(../img/common/drop_down_lg.png) no-repeat 100% 50%;
    background-size: 9px 9px;
  }
  .smart_section1 .text {
    padding-top: 210px;
  }

  .smart_section1 .text h3 {
    font-size: 19px;
    letter-spacing: -1px;
    line-height: 1.37;
  }

  .smart_section1 p {
    font-size: 12px;
    letter-spacing: -0.3px;
    line-height: 1.5;
    margin-top: 12px;
  }
  .smart_header {
    max-width: 100%;
    width: 100%;
    padding: 0 24px;
  }
  .gradient {
    top: 64px;
  }
  .gradient .gradient2 {
    top: 62px;
    left: 1px;
  }
  .gradient2 {
    top: 62px;
    left: -1px;
  }
  #myVideo {
    top: 63px;
  }
  .sd_Icon_img,
  .sd_Icon_img2,
  .sd_Icon_img3 {
    position: absolute;
    width: 156px;
    height: 221px;
    top: -1px;
    left: 0;
    border-radius: 0 0 16px 16px;
    overflow: hidden;
  }

  .smart_section1 {
    width: 100%;
    min-width: 330px;
    height: 300px;
  }

  .smart_section2 {
    max-width: 1260px;
    width: 100%;
    margin: 0 auto;
    height: 100%;
    position: relative;
    left: 0;
    top: 64px;
    z-index: 2;
    padding: 16px 24px 31px;
    background: #141414;
  }

  .smart_section2 .text h4 {
    font-size: 18px;
    font-weight: 500;
    line-height: 1;
    letter-spacing: -0.4px;
    color: #ffffff;
    display: inline-block;
    vertical-align: middle;
    margin-bottom: 0;
  }

  .smart_section2 .text .see-more {
    font-size: 14px;
    line-height: 1.8;
    letter-spacing: -0.25px;
    text-align: left;
    color: #cccccc;
    display: inline-block;
    padding: 0;
    cursor: pointer;
  }

  .see-more-text {
    top: 38px;
  }
  .see-more-text h3 {
    font-size: 15px;
    font-weight: 300;
    font-stretch: normal;
    font-style: normal;
    line-height: 1.47;
    letter-spacing: -0.38px;
    text-align: center;
    color: #ffffff;
  }

  .smart_section2 .swiper-slide {
    width: 156px;
    height: 221px;
  }

  .smart_section2 .swiper-slide:last-child {
    margin-right: 0;
  }
  .smart-img {
    width: 158px;
    height: 140px;
  }

  .smart-img img {
    width: 100%;
    height: 100%;
  }

  .sd_Gbg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }
  .sd_Txt1 {
    position: absolute;
    bottom: 51px;
    width: 100%;
    left: 16px;
    margin: 0;
    font-size: 14px;
    font-weight: normal;
    font-stretch: normal;
    font-style: normal;
    line-height: 1.64;
    letter-spacing: -0.35px;
    text-align: left;
    color: #ffffff;
  }
  .sd_Txt2 {
    position: absolute;
    left: 0;
    bottom: 15px;
    overflow: hidden;
    width: 100%;
    height: 35px;
    font-size: 12px;
    font-weight: normal;
    font-stretch: normal;
    font-style: normal;
    line-height: 1.5;
    letter-spacing: -0.3px;
    text-align: left;
    color: #999999;
  }
  .smart-text {
    text-align: left;
    position: absolute;
    left: 20px;
    top: 105px;
  }
  .smart-text h6,
  .smart-text p {
    display: inline-block;
    font-size: 10px;
    font-weight: 300;
    font-stretch: normal;
    font-style: normal;
    line-height: 2.4;
    letter-spacing: -0.25px;
    text-align: left;
    color: #ffffff;
  }

  .smart_section2 .swiper-button-next {
    background: url(../img/top/mo_right-arrow.png) no-repeat;
    width: 30px;
    height: 30px;
    background-size: cover;
    /* right: -24px; */
    left: auto;
  }
  .smart_section2 .swiper-button-next.swiper-button-disabled {
    background: url(../img/top/mo_right-arr-dis.png) no-repeat;
    opacity: 1;
    background-size: cover;
  }

  .smart_section2 .swiper-button-prev {
    background: url(../img/top/mo_left-arrow.png) no-repeat;
    width: 30px;
    height: 30px;
    background-size: cover;
    /* left: -24px; */
    right: auto;
  }

  .smart_section2 .swiper-button-prev.swiper-button-disabled {
    background: url(../img/top/mo_left-arr-dis.png) no-repeat;
    opacity: 1;
    background-size: cover;
  }

  .see-more-card .smart-bg {
    display: none;
  }

  .see-more-card .m-smart-bg {
    display: inline-block;
  }

  /* 상세 */
  .smart-main-color .video_bg {
    right: 0;
    top: 63px;
    min-width: 100%;
    min-height: 100%;
    height: 100%;
  }
  .detail_section {
    width: 100%;
    max-width: 1260px;
  }

  .chapter__bx {
    padding: 20px 24px 0 24px;
  }
  .chapter {
    width: 32px;
    height: 18px;
    background-color: #252525;
    font-size: 10px;
    font-weight: normal;
    line-height: 3.2;
    letter-spacing: -0.25px;
    text-align: center;
    color: #b72933;
    padding: 2px 6px;
  }
  .sir {
    font-size: 12px;
  }

  .study_subject {
    padding: 12px 24px 4px 24px;
    font-size: 18px;
    font-weight: 600;
    line-height: 1.5;
    letter-spacing: -0.75px;
    text-align: left;
    color: #ffffff;
  }

  .sub_subject {
    font-size: 13px;
    padding: 0 24px;
  }

  .sub_subject {
    margin-bottom: 40px;
  }

  .wrap {
    width: 100%;
  }

  .lecture_list {
    display: flex;
  }

  .lecture_list > li {
    cursor: pointer;
    margin-right: 25px;
    padding-bottom: 9px;
    font-size: 18px;
    text-align: center;
    color: #fff;
    width: 30%;
  }
  .lecture_list > li.active {
    border-bottom: 2px solid #b72933;
  }
  .lecture_list > li:last-child {
    margin-right: 0;
  }
  .chapter_tt {
    position: sticky;
    padding: 18px 0 18px 24px;
    font-size: 16px;
    font-weight: 500;
    color: #fff;
    border-top: 1px solid #262626;
    transition: all 0.3s cubic-bezier(0.19, 1, 0.22, 1);
  }

  .chapter_tt h4 {
    font-size: 16px;
    line-height: 1;
    letter-spacing: -0.5px;
    text-align: left;
    color: #ffffff;
  }

  .pc_ver {
    display: none;
  }

  .chapter_info > ul > li {
    padding: 20px 24px;
    border-top: 1px solid #262626;
    background-color: #101010;
    font-size: 12px;
    width: 100%;
  }
  .chapter_list li {
    padding: 30px 34px;
  }
  .chapter_list h4 {
    font-size: 14px;
    font-weight: 500;
    padding-right: 29px;
    line-height: 3;
  }

  .description {
    padding: 20px;
  }

  .m-book_icon {
    display: block;
  }

  .pc-book_icon {
    display: none;
  }

  .book {
    margin-right: 7px;
  }
  .book img {
    width: 84px;
    height: 110px;
  }
  .book_text h4 {
    margin-top: 15px;
    font-size: 16px;
  }
  .book_text > div:nth-child(2) {
    margin: 10px 0 5px;
  }
  .book_title_sub {
    margin-right: 20px;
    font-size: 12px;
  }
  .book_txt_sub {
    font-size: 12px;
  }
  .list_text {
    width: 85%;
  }
  .chapter_list .list_text + div {
    float: left;
  }
  .head > .head_inner > ol > li.free {
    display: none;
  }

  #tabs1,
  #tabs2,
  #tabs3,
  #tabs4,
  #tabs5,
  #tabs6 {
    margin-top: 7px;
  }
  .tabLink {
    font-size: 16px;
  }
  .tabLink::after {
    margin: 0px 10px 0px;
    width: 1px;
    height: 10px;
  }
}

@media (min-width: 320px) and (max-width: 430px) {
  .chapter_list li {
    padding: 20px;
  }
  .chapter_list h4 {
    padding-right: 20px;
  }
  .chapter_list .list_text + div {
    float: left;
  }
  .list_text {
    width: 85%;
  }
}

@media (max-width: 320px) {
  .chapter__bx {
    padding: 20px 20px 0 20px;
  }
  .study_subject {
    padding: 12px 20px 4px 20px;
  }
  .sub_subject {
    margin-bottom: 30px;
  }

  .chapter_list .list_text + div {
    float: left;
  }
  .book {
    margin-right: 0;
  }
  .lecture_list > li {
    margin-right: 15px;
  }
  .description {
    padding: 20px 0px 20px 0px;
  }
}