* {
  max-width: 3840px;
}

.section-main {
  width: 100%;
  height: 100vh;
  box-sizing: border-box;
  position: relative;
}

.main-header {
  width: 80%;
  height: 50px;
  border-bottom: 1px solid gray;
  position: absolute;
  left: 0;
  top: 0;
  padding: 0 10% 20px 10%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-nav {
  width: 60%;
  padding-top: 3px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}

.nav__link_t {
  color: rgb(23, 190, 210);
  font-weight: bold;
}

.nav__link:hover {
  color: gray;
}

.header-logo {
  width: 80px;
  height: 20px;
  background: url(../Hi-tech/images/logo.png) no-repeat center;
  background-size: 90%;
}

.header-logo:hover {
  width: 80px;
  height: 20px;
  background: url(../Hi-tech/images/logo-dark.png) no-repeat center;
  background-size: 90%;
}

.main-content {
  width: 90%;
  height: 40%;
  position: absolute;
  top: 20%;
  left: 10%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.main-content__title {
  line-height: 60px;
}

.main-content__text {
  width: 80%;
  line-height: 20px;
}

.main-button__button {
  padding: 10px 20px;
  border: 1px solid gray;
}

.main-button__button:hover {
  color: gray;
}

/* -- section1--*/

.section1 {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  padding: 0 10%;
  box-sizing: border-box;
  background-color: rgb(242, 242, 243);
}

.section1-content {
  width: 33%;
  height: 300px;
  box-sizing: border-box;
  background: white;
  padding: 60px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

/* -- section2--*/

.section2 {
  padding: 0 10%;
  box-sizing: border-box;
  display: flex;
  flex-wrap: wrap;
  background-color: rgb(242, 242, 243);
}


.section2-header {
  width: 99%;
  height: 270px;
  padding: 60px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background-color: white;
}

.section2-header__text {
  width: 50%;
}

.section2-content {
  width: 33%;
  padding: 20px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background-color: white;
}

.section2-content__pic1 {
  height: 300px;
  background: url(../Hi-tech/images/ruff-01.jpg) no-repeat center;
}

.section2-content__pic2 {
  height: 300px;
  background: url(../Hi-tech/images/ruff-02.jpg) no-repeat center;
}

.section2-content__pic3 {
  height: 300px;
  background: url(../Hi-tech/images/ruff-03.jpg) no-repeat center;
}


.section2-content-text {
  height: 200px;
  padding-top: 30px;
  padding-bottom: 60px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

/* -- section3--*/

.section3 {
  width: 100%;
  box-sizing: border-box;
  padding: 30px 10%;
  background: rgb(242, 242, 243);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  background-color: rgb(242, 242, 243);
}

/* -- section4--*/

.section4 {
  display: flex;
  flex-wrap: wrap;
  padding: 0 10%;
  padding-top: 30px;
  box-sizing: border-box;
}

.section4-header {
  width: 100%;
  height: 270px;
  padding-top: 20px;
  padding-left: 10px;
  box-sizing: border-box;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
}

.section4-header-content {
  width: 100%;
  height: 200px;
  padding-left: 40px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}


.section4-header-kov {
  height: 10px;
  width: 10px;
}

.section4-header__text {
  width: 50%;
}

.section4-content {
  width: 33%;
  padding: 20px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.section4-content-text {
  height: 400px;
  padding-top: 30px;
  padding-bottom: 60px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.section4-content__text {
  list-style-type: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.section4-content__button {
  width: 110px;
  height: 47px;
  line-height: 47px;
  text-align: center;
  display: table-cell;
  vertical-align: middle;
  background-color: rgb(243, 244, 245);
}

/* -- section5--*/

.section5 {
  width: 100%;
  box-sizing: border-box;
  padding-left: 10%;
  display: flex;
  flex-wrap: wrap;
}

.section5-content__text {
  width: 50%;
  height: 300px;
  box-sizing: border-box;
  margin-bottom: 30px;
  padding-right: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.section5-text2 {
  padding-bottom: 60px;
}

.section5-content-pic {
  width: 50%;
  height: 300px;
}

.section5-content__pic {
  object-fit: cover;
  width: 100%;
  height: 100%;
}

/* -- section6--*/

.section6 {
  width: 100%;
  box-sizing: border-box;
  padding: 0 10%;
  padding-top: 20px;
  padding-bottom: 40px;
  display: flex;
  flex-wrap: wrap;
}

.section6-content__text {
  width: 100%;
  height: 150px;
  box-sizing: border-box;
  margin-bottom: 30px;
  padding-right: 20px;
  padding-top: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.section6-text {
  width: 50%
}

.section6__pic {
  object-fit: cover;
  width: 100%;
  height: 100%;
}

.section6-pic1 {
  width: 66%;
  height: 300px;
}

.section6-pic2,
.section6-pic3,
.section6-pic4,
.section6-pic5 {
  width: 33%;
  height: 300px;
}

/* -- section6--*/

.section7 {
  position: relative;
  width: 100%;
  background-image: url(../Hi-tech/images/section7.jpg);
  background-size: cover;
  display: flex;
  flex-wrap: wrap;
}

.section7-list1 {
  height: 400px;
  width: 25%;
  padding: 30px 5%;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.section7-list2 {
  height: 180px;
  width: 25%;
  padding: 30px 5%;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.section7-forms {
  width: 50%;
  height: 500px;
  box-sizing: border-box;
  padding: 20px 5%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.forms {
  width: 100%;
  height: 50px;
  background-color: rgba(0, 0, 0, 0.1);
  border: unset;
}

.section7-forms__text {
  width: 100%;
  background-color: rgba(0, 0, 0, 0.1);
  border: unset;
  padding-top: 5px;
  color: rgb(194, 193, 193); 
}

input::-webkit-input-placeholder { 
  color: rgb(194, 193, 193); 
}

.section7-button {
  width: 100px;
  height: 50px;
  color: white;
  background-color: rgb(23, 190, 210);
  border: unset;
}

.footer-logo {
  width: 80px;
  height: 20px;
  background: url(../Hi-tech/images/logo.png) no-repeat center;
  background-size: 90%;
}

.footer-logo:hover {
  width: 80px;
  height: 30px;
  background: url(../Hi-tech/images/logo-dark.png) no-repeat center;
  background-size: 100%;
}

.section7-footer {
  width: 100%;
  height: 150px;
  margin-top: 150px;
  padding: 0 3%;
  border-top: 1px solid gray;
  box-sizing: border-box;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
}

.footer-text {
  width: 60%;
  padding-right: 50px;
}

.footer__text {
  text-align: center;
  color:rgb(23, 190, 210);
}

.footer-autor {
  color: grey;
}

.button-up {
  position: absolute;
  width: 100px;
  height: 100px;
  right: 20px;
  bottom: 20px;
  background-color: rgba(0, 0, 0, 0.2);
  border: solid 1px grey;
  border-radius: 5px;
  text-align: center;
}

.button__up {
  text-decoration: none;
  font-size: 32px;
  font-weight: bold;
  color: grey;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
}

.button-up__s {
  font-size: 44px;
  color: grey;
  text-decoration: none;
}

.button-up:hover {
  background-color: rgba(0, 0, 0, 0.1);
}