.main-color {
  color: var(--main-color);
}
.underline {
  position: relative;
  width: max-content !important;
}
.underline::before {
  position: absolute;
  left: 0;
  bottom: -0.5rem;
  content: "";
  height: 1px;
  width: 100%;
  background-color: black;
}
header,main,footer {
  width: 100%;
}
header {
  box-shadow: 0 -5px 10px 0;
}
header > img {
  width: 100%;
}
header > section {
  padding: 0 18rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  height: 4rem;
}
header > section > img {
  height: 70%;
}
header nav,header ul,header ul > li,header a {
  height: 100%;
}
header .s-bg-image {
	min-height: 800px;
	background: url(../imgs/index/top_head.jpg);
	background-repeat: no-repeat;
	/* padding-bottom: 152px; */
	background-size: cover;
}
header nav > ul {
  display: flex;
}
header ul > li {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}
header ul > li > a,
header ul > li > span {
  padding: 0 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}
header ul > li:last-child > a {
  padding-right: 0;
}
header ul > li.drop-down {
  position: relative;
}
header ul > li.drop-down::before {
  position: absolute;
  top: 50%;
  right: 2.5rem;
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  border: #666 1px solid;
  border-width: 0 1px 1px 0;
  transform: translate(-50%, -75%) rotate(45deg);
}
header ul > li.drop-down > span {
  padding-right: 4rem;
}
header ul > li section {
  position: absolute;
  left: 0;
  top: 100%;
  z-index: 5;
  overflow: hidden;
  width: 100%;
  height: 0;
  background-color: white;
  transition: height 500ms;
}
header ul > li.drop-down:hover section,
header ul > li.drop-down section:hover {
  height: calc(var(--child-num) * 3rem);
}
header ul > li section li {
  width: 100%;
  height: 3rem;
  text-align: center;
  transition: background 500ms;
}
header ul > li section li:hover {
  background: #efefef;
}
header ul > li section li a {
  display: inline-block;
  width: 100%;
  height: 100%;
  line-height: 3rem;
}
main > section {
  padding: 0 18rem;
}
main > .introduce {
  display: flex;
  flex-direction: column;
  justify-content: center;
  /* height: 54rem; */
  background: url(../imgs/index/company_introduction.jpg);
  background-repeat: no-repeat;
  background-size: cover;
  background-color: transparent;
  background-position: 50% 50%;
}
main > .introduce > div {
  width: 50%;
  letter-spacing: 0.1em;
}
main > .introduce > div.underline {
  position: relative;
  left: 20%;
  transform: translateX(-50%);
  margin-top: 5rem;
  margin-bottom: 1rem;
  font-size: 3rem;
  font-weight: 700;
  text-align: center;
  letter-spacing: 0.15rem;
}
main > .introduce > div p {
  margin: 3rem 0;
  line-height: 3rem;
  font-size: 1.3rem;
  letter-spacing: 0.2em;
}
main > section:nth-child(2) {
  padding: 5rem 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  /* height: 63.5rem; */
  background: url(../imgs/index/index_introduction_back.jpg);
  background-repeat: no-repeat;
  background-size: cover;
  background-color: transparent;
  background-position: 50% 50%;
}
main > section:nth-child(2) .info{
	margin-bottom: 4rem;
}
main > section:nth-child(2) .info .underline {
  margin-bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: 0.15rem;
}
main > section:nth-child(2) .info .underline + div {
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 2.5rem;
  font-size: 1.3rem;
  letter-spacing: 0.2em;
  /* font-weight: 500; */
}
main > section:nth-child(2) > div + div {
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
}
main > section:nth-child(2) > div + div > div {
  display: flex;
  align-items: center;
  flex-direction: column;
}
main > section:nth-child(2) > div + div img {
  margin-bottom: 4rem;
  width: 25%;
}
main > section:nth-child(2) > div + div span {
  font-size: 3.5rem;
  font-weight: 700;
}
main > section:nth-child(2) > div + div span + span {
  font-size: 2rem;
  font-weight: 500;
  letter-spacing: 0.2em;
}
main > section:nth-child(2) > div + div > div + div span + span {
  letter-spacing: 0.1em;
}
main > .teacher {
  padding: 8rem 28rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}
main > .teacher > .title {
  display: flex;
  flex-direction: column;
  align-items: center;
}
main > .teacher > .title .underline {
  margin-bottom: 2rem;
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: 0.15em;
}
main > .teacher > .title .underline::before {
  left: 50%;
  transform: translateX(-50%);
  width: 30%;
}
main > .teacher > .title .underline + div {
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: 0.15em;
}
main > .teacher img {
  width: 20rem;
}
main > .teacher > div + div {
  margin: 4rem;
  display: flex;
  font-size: 1.3rem;
  letter-spacing: 0.1em;
}
main > .teacher > div:nth-child(3) {
  margin-top: 1rem;
  flex-direction: row-reverse;
}
main > .teacher .space {
  width: 15%;
}
main > .teacher > div + div .space + div {
  padding: 1.5rem 0;
  padding-left: 1.5rem;
}
main > .teacher > div + div .space + div li {
  margin: 1.5rem 0;
  position: relative;
  line-height: 1.5em;
}
main > .teacher > div + div .space + div li::before {
  position: absolute;
  left: -1.5rem;
  top: 0;
  transform: translate(0, 75%);
  content: "";
  border-left: rgb(57, 199, 196) 0.8rem solid;
  border-top: transparent 0.4rem solid;
  border-bottom: transparent 0.4rem solid;
}
main > .teacher .button {
  position: relative;
  margin: 0 0 2rem;
  padding: 0.3rem 1rem;
  width: max-content;
  background-color: rgb(57, 199, 196);
  border-radius: 2rem;
  color: white;
}
main > .teacher .button::before,
main > .teacher .button::after {
  position: absolute;
  content: "";
  top: 50%;
}
main > .teacher .button::before {
  right: 1.5em;
  width: 0.5rem;
  height: 0.5rem;
  border-top: white 1px solid;
  border-right: white 1px solid;
  transform: translateY(-50%) rotate(45deg);
}
main > .teacher .button::after {
  right: 1.25em;
  width: 0.5rem;
  height: 1rem;
  border-right: white 1px solid;
  transform: translateY(-50%);
}
main > .service {
  padding: 8rem 15rem 10rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  background: url(../imgs/index/index_back_2.jpg) no-repeat 100%/100%;
}
main > .service .title {
  margin-bottom: 6rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  font-weight: 700;
  letter-spacing: 0.2em;
}
main > .service .title .underline {
  margin-bottom: 2.5rem;
  font-size: 3rem;
}
main > .service .title .underline + div {
  font-size: 2rem;
}
main > .service > div + div {
  display: flex;
  justify-content: space-between;
}
main > .service > div + div > div {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 20%;
}
main > .service img {
  margin-bottom: 2rem;
  width: 80%;
}
main > .service .core a{
	display: contents;
	vertical-align: middle;
}
main > .service .core span {
  font-size: 2rem;
  font-weight: 500;
  letter-spacing: 0.2em;
}
main > .contact {
  padding: 0;
  position: relative;
  width: 100%;
}
main > .contact > img {
  width: 100%;
}
main > .contact > div {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: white;
}
main > .contact > div .title {
  margin-bottom: 4rem;
  font-size: 2rem;
}
main > .contact > div .title + div {
  margin: 0 auto;
  width: max-content;
  background-color: rgb(27, 50, 62);
  border-radius: 5rem;
  font-size: 1.2rem;
  letter-spacing: 0.1rem;
}
main > .contact > div .title + div > a {
  display: block;
  padding: 0.7rem 1rem;
}
main > .share {
  position: relative;
  padding: 0;
}
main > .share > .underline {
  margin: 8rem auto 3rem;
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.2em;
}
main > .share > img {
  width: 100%;
}
main > .share > section {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
main > .share .content > div:nth-child(1) {
  position: absolute;
  width: 52rem;
  color: white;
  letter-spacing: 0.2em;
  font-size: 1.3rem;
  line-height: 2.5rem;
}
main > .share .content .item1 {
  top: 22%;
  left: 19%;
}
main > .share .content > div > div:nth-child(2) {
  padding: 0.5rem;
  position: absolute;
  right: 1rem;
  letter-spacing: 0.1em;
  line-height: 1em;
  border: white 1px solid;
}
main > .share .content .item2 {
  top: 36%;
  left: 51%;
}
main > .share .content > .item2 > div:nth-child(2) {
  margin-top: 2rem;
}
main > .share .info {
  position: absolute;
  bottom: -100%;
  left: 16%;
  color: black;
  letter-spacing: 0.1em;
  line-height: 2em;
}
main > .share .item2 .info {
  bottom: -150%;
}
main > .share .info div + div {
  color: #aaa;
}
main > .share > section > div:last-child {
  position: absolute;
  bottom: -4rem;
  right: 12%;
  width: 0;
  height: 0;
  border-left: rgb(57, 199, 196) 1.5rem solid;
  border-top: transparent 0.8rem solid;
  border-bottom: transparent 0.8rem solid;
}
main > .share > section > div:last-child::before,
main > .share > section > div:last-child::after {
  position: absolute;
  top: 0;
  content: "";
  border-left: rgb(57, 199, 196) 1.5rem solid;
  border-top: transparent 0.8rem solid;
  border-bottom: transparent 0.8rem solid;
}
main > .share > section > div:last-child::before {
  transform: translate(-200%, -50%);
}
main > .share > section > div:last-child::after {
  transform: translateY(-50%);
}
main > section:last-child {
  margin-top: 5rem;
  padding: 0;
}
main > section:last-child img {
  width: 100%;
}

footer > img {
  width: 100%;
}

main .share .experience{
	width: 100%;
	display: flex;
	flex-direction: row;
}
main .experience .item{
	width: 50%;
}
main .experience .item:first-child{
	text-align: right;
}
main .experience .item a{
	display: block;
}
main .experience .item:last-child a{
	position: relative;
	left: -2rem;
	top:2rem;
}


/* normal width */
.container .two-thirds.column {
    width: 675.99296px;
}


@media only screen and (min-width: 1000px) and (max-width: 1299px){
	body main > section {
		padding: 0 8rem;
	}
	body main > .introduce > div {
		width: 603.32704px;
	}
/* 	body main > section:nth-child(2) {
	  padding: 10rem 0;
	  display: flex;
	  flex-direction: column;
	  align-items: center;
	  justify-content: space-between;
	  background: url(../imgs/index/index_introduction_back.jpg) no-repeat 100%/100%;
	} */
}

@media only screen and (min-width: 876px) and (max-width: 999px){
	body main > section {
		padding: 0 2rem;
	}
	body main > .introduce {
	  background: url(../imgs/wap/index/company_introduction.jpg);
	  display: flex;
	  flex-direction: column;
	  justify-content: center;
	  height: 54rem;
	  background-repeat: no-repeat;
	  background-size: cover;
	  background-color: transparent;
	  background-position: 50% 50%;
	}
	body main > .introduce > div {
		width: 530.66112px;
	}
}

@media only screen and (min-width: 728px) and (max-width: 875px){
	body main > section {
		padding: 0 2rem;
	}
	body main > .introduce {
	  background: url(../imgs/wap/index/company_introduction_wap.jpg);
	  display: flex;
	  flex-direction: column;
	  justify-content: center;
	  height: 54rem;
	  background-repeat: no-repeat;
	  background-size: cover;
	  background-color: transparent;
	  background-position: 50% 50%;
	}
	body main > .introduce > div {
		width: 100%;
		letter-spacing: 0.1em;
	}
	body main > .introduce > div.underline{
		/* left: 35%; */
		/* left: 0%; */
		transform: translateX(50%);
	}
	
	body main > .teacher{
		padding: 0 0;
	}
	
	body main .share .experience{
		    width: 100%;
		    display: flex;
		    flex-direction: column;
		    align-items: center;
	}
	body main .experience .item{
		width: 100%;
		text-align: center;
		
	}
	body main .experience .item:first-child{
		    text-align: center;
			margin-bottom: ;
	}
	main .experience .item:last-child a {
	    position: inherit;
	    left: 0;
	    top: 0;
	}
}

@media only screen and (min-width: 490px) and (max-width: 727px){
	body main > section {
		padding: 0 2rem;
	}
	body main > .introduce {
	  background: url(../imgs/wap/index/company_introduction_wap.jpg);
	  display: flex;
	  flex-direction: column;
	  justify-content: center;
	  height: 54rem;
	  background-repeat: no-repeat;
	  background-size: cover;
	  background-color: transparent;
	  background-position: 50% 50%;
	}
	body main > .introduce > div {
		width: 419.32896px;
	}
	
	body main > .introduce > div.underline{
		/* left: 35%; */
		/* left: 0%; */
		transform: translateX(50%);
	}
	
	body main > section:nth-child(2) .info .underline + div{
		font-size: 1.5rem;
	}
	body main > section:nth-child(2) > div + div span{
		font-size: 1.5rem;
	}
	body main > section:nth-child(2) > div + div span + span{
		font-size: 1rem;
	}
	
	
}

@media only screen and (max-width: 490px){
	html {
	    font-size: 12px;
	    line-height: 1;
		-webkit-text-size-adjust: 100%;
	}
	body main h2{
		font-size: 14px;
	}
	
	body main > section {
		padding: 0 1rem;
	}
	body main > .introduce {
	  background: url(../imgs/index/company_introduction_wap.jpg);
	  display: flex;
	  flex-direction: column;
	  justify-content: center;
	  background-repeat: no-repeat;
	  background-size: cover;
	  background-color: transparent;
	  background-position: 50% 50%;
	  padding: 1rem 1rem;
	}
	body header .s-bg-image {
		min-height: 0px;
		background: url(../imgs/wap/index/top_head.jpg);
		background-repeat: no-repeat;
		background-size: cover;
		background-color: transparent;
		background-position: 50% 50%;
		padding-bottom: 152px;
	}
	body main > .introduce > div p {
		margin: 1rem 0;
		line-height: 1.7;
		font-size: 1rem;
		letter-spacing: 0.1rem;
	}
	main > .introduce > div{
		width: 100%;
	}
	
	body main > .introduce > div.underline {
		font-size: 1.2rem;
		margin: 1rem auto;
		left: 0%;
		transform: inherit;
	}
	body main > section:nth-child(2){
		height: min-content;
		padding: 2rem 1rem;
	}
	body main > section:nth-child(2) .info .underline{
		font-size: 1.2rem;
		margin-bottom: 2rem;
	}
	body main > section:nth-child(2) .info .underline + div {
		display: flex;
		flex-direction: column;
		align-items: flex-start;
		line-height: 1.7;
		font-size: 1rem;
		letter-spacing: 0.1em;
		text-align: left;
	}
	
	body main > section:nth-child(2) > div + div{
		    padding: 0 0;
	}
	body main > section:nth-child(2) > div + div img {
		    margin-bottom: 1rem;
		    width: 50%;
	}
	main > section:nth-child(2) > div + div > div{
		text-align: center;
	}
	body main > section:nth-child(2) > div + div span{
		font-size: 1rem;
		padding: 0.2rem 0;
		    letter-spacing: 0.15em;

	}
	
	body main > .teacher {
		padding: 2rem 1rem;
	}
	body main > .teacher > .title .underline{
		margin-bottom: 2rem;
		font-size: 1.2rem;
		font-weight: 700;
		letter-spacing: 0.15em;
	}
	body main > .teacher > .title .underline + div{
		    font-size: 1.5rem;
		    font-weight: 700;
		    letter-spacing: 0.15em;
	}
	body main > .teacher > div:nth-child(3) {
		margin-top: 0rem;
		flex-direction: column;
	}
	body main > .teacher > div + div{
		    margin: 0 0;
			padding-top: 1rem;
		    font-size: 1rem;
		    line-height: 1.5rem;
		    letter-spacing: 0.1em;
			flex-direction: column;
			align-items: center;
	}
	body main > .teacher > div+ div>div:nth-child(1){
		display: flex;
		flex-direction: column;
		justify-content: center;
	}
	body main > .teacher img {
		width: 10rem;
	}
	body main > .teacher .space {
		width: 10%;
	}
	
	body main > .teacher > div + div .space + div{
		padding: 2rem 2rem;
	}
	body main > .teacher > div + div .space + div li{
		margin: 0.5rem 0;
	}
	body main > .service{
	    padding: 1rem 0;
		background: url(../imgs/index/index_back_2.jpg);
		background-repeat: no-repeat;
		background-size: cover;
	}
	body main > .service .title{
		margin-bottom: 1rem;
	}
	body main > .service .title .underline{
		font-size: 1.2rem;
		font-weight: 700;
		letter-spacing: 0.15em;

		    /* transform: translateX(-20%); */
		    /* left: 0%; */
		    /* transform: translateX(50%); */
		    /* text-align: center; */
		    margin: 0 auto;
	}
	body main > .service .title .underline + div{
		font-size: 1.5rem;
		font-weight: 700;
		letter-spacing: 0.15em;
		    margin-top: 1rem;
	}
	body main > .service .core span{
		    font-size: 1rem;
		    font-weight: 500;
		    letter-spacing: 0.15em;
		    text-align: center;
	}

	body main > .contact{
		    padding: 1rem 0px;
	}
	body main > .contact > div .title{
		    margin-bottom: 0.5rem;
		    font-size: 1rem;
	}
	body main > .contact > div .title + div{
		font-size: 1rem;
	}
	body main > .contact > div .title + div > a{
		    display: block;
		    padding: 0.2rem 0.2rem;
	}
	
	body main > .share > .underline{
		margin: 1rem auto 1rem;
		font-size: 1.5rem;
		font-weight: 700;
		letter-spacing: 0.15em;
		margin-top: 1rem;
	}
	body main .share .experience{
		flex-direction: column;
	}
	body main .experience .item{
		width: 100%;
		
	}
	body main .experience .item img{
		width: 100%;
	}
	
	body main .experience .item{
		width: 100%;
		text-align: center;
		
	}
	body main .experience .item:first-child{
		    text-align: center;
			margin-bottom: ;
	}
	body main .experience .item:last-child a {
	    position: inherit;
	    left: 0;
	    top: 0;
	}
	body main > section:last-child {
	      margin-top: 2rem;
	      margin-bottom: 2rem;
	}
}