.topbar {
  box-shadow: 0 2px 20px -16px #000;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 99;
  background-color: white;
}
.topbar_container {
  width: 1200px;
  padding: 1rem 0;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.topbar_logo {
  font-size: larger;
}
.topbar_right {
  display: flex;
  justify-content: flex-end;
  align-items: center;
}
.topbar_user {
  color: #FFE300;
}
.topbar_menu {
  margin-left: 1rem;
  font-weight: bolder;
}

.header {
  background-position: center center;
  background-repeat: no-repeat;
  background-size: cover;
  padding-top: 3rem;
}
.header.bg_1 {
  background-image: url("../image/banner_1.png");
  padding-bottom: 50rem;
}
.header.bg_2 {
  background-image: url("../image/banner_2.png");
  padding-bottom: 40rem;
}
.header.bg_3 {
  background-image: url("../image/banner_3.png");
  padding-bottom: 40rem;
}
.header.bg_4 {
  background-image: url("../image/banner_4.png");
  padding-bottom: 40rem;
}
.header.bg_5 {
  background-image: url("../image/banner_5.png");
  padding-bottom: 40rem;
}
.header.bg_6 {
  background-image: url("../image/banner_6.png");
  padding-bottom: 40rem;
}
.header_container {
  width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.header_logo {
  box-sizing: border-box;
  height: 8rem;
  font-size: 3rem;
  background-color: #FFE300;
  font-weight: bolder;
  padding-left: 3rem;
  padding-right: 2rem;
  display: flex;
  align-items: center;
}
.header_menu {
  display: flex;
}
.header_menu_item {
  width: 8rem;
  height: 8rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background-color: #FFE300;
  color: black;
  margin-left: 0.25rem;
}
.header_menu_item.active {
  background-color: #272727;
  color: white;
}
.header_menu_icon {
  max-width: 4rem;
  max-height: 4rem;
  width: auto;
  height: auto;
  margin-bottom: 1rem;
}

.search {
  margin-top: 3rem;
  margin-bottom: 3rem;
}
.search_container {
  box-sizing: border-box;
  width: 1200px;
  margin: 0 auto;
  background-image: url("../image/bg_search.png");
  background-position: center center;
  background-repeat: no-repeat;
  background-size: cover;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2rem 2rem;
}
.search_logo {
  box-sizing: border-box;
  font-size: 3rem;
  font-weight: bolder;
  display: flex;
  align-items: center;
  color: white;
}
.search_field {
  flex: 1;
  background-color: white;
  display: flex;
  margin-left: 2rem;
  border-radius: 2rem;
  font-size: larger;
}
.search_input {
  flex: 1;
  border: none;
  background-color: transparent;
  padding: 1rem 2rem;
}
.search_input:focus {
  outline: none;
}
.search_button {
  border: none;
  background-color: #FFE300;
  color: black;
  padding: 0 1rem;
  border-radius: 2rem;
  min-width: 110px;
  font-weight: bolder;
  cursor: pointer;
}
.search_button:focus {
  outline: none;
}

.copyright {
  background-color: #01C9C7;
  color: white;
  padding: 2rem 0;
  text-align: center;
}

.section_header {
  margin-bottom: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.section_header_left {
  display: flex;
  align-items: baseline;
}
.section_title {
  border-left: 8px solid #FFE300;
  font-size: 2rem;
  font-weight: bolder;
  padding-left: 1rem;
  margin-right: 1rem;
}
.section_tab {
  display: flex;
  align-items: center;
}
.section_tab_item {
  padding: 0 0.5rem;
  color: #888888;
  cursor: pointer;
}
.section_extra {
  display: flex;
  align-items: center;
}
.section_extra_item {
  cursor: pointer;
}
.section_extra .color {
  color: #FFE300;
}
.section_extra .spliter {
  margin: 0 0.5rem;
}

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
}
.pagination_number {
  display: flex;
}
.pagination_number_item {
  box-sizing: border-box;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
  background-color: #BABABA;
  cursor: pointer;
  margin: 0 0.25rem;
}
.pagination_number_item.active {
  background-color: #272727;
}
.pagination_field {
  color: #BABABA;
  margin: 0 1rem;
}
.pagination_field_input {
  border: 1px solid;
  text-align: center;
  width: 3rem;
  box-sizing: border-box;
}
.pagination_field_input:focus {
  outline: none;
}
.pagination_button {
  padding: 0.5rem 1rem;
  background-color: #FFE300;
  color: #3C3C3C;
  cursor: pointer;
}

.page_home_course .section {
  margin-bottom: 3rem;
}
.page_home_course .row {
  margin-left: -1rem;
  margin-right: -1rem;
  display: flex;
  flex-wrap: wrap;
}
.page_home_course .col {
  flex: 0 0 25%;
  padding-left: 1rem;
  padding-right: 1rem;
  margin-bottom: 5rem;
}
.page_home_course .course {
  display: flex;
  flex-direction: column;
}
.page_home_course .course_image {
  width: 276px;
  height: 151px;
  margin-bottom: 0.5rem;
}
.page_home_course .course_body {
  padding: 0.5rem;
}
.page_home_course .course_title {
  font-weight: bolder;
  font-size: larger;
  margin-bottom: 0.5rem;
}
.page_home_course .course_field {
  color: #999999;
}
.page_home_course .section_header {
  margin-bottom: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.page_home_course .section_header_left {
  display: flex;
  align-items: baseline;
}
.page_home_course .section_title {
  border-left: 8px solid #FFE300;
  font-size: 2rem;
  font-weight: bolder;
  padding-left: 1rem;
  margin-right: 1rem;
}
.page_home_course .section_tab {
  display: flex;
  align-items: center;
}
.page_home_course .section_tab_item {
  padding: 0 0.5rem;
  color: #888888;
  cursor: pointer;
}
.page_home_course .section_extra {
  display: flex;
  align-items: center;
}
.page_home_course .section_extra_item {
  cursor: pointer;
}
.page_home_course .section_extra .color {
  color: #FFE300;
}
.page_home_course .section_extra .spliter {
  margin: 0 0.5rem;
}

.dropdown {
  border: none;
  color: #888888;
}
.dropdown:focus {
  outline: none;
}