:root {
  --color-normal: #1A234E;
  --color-hover: #0324A8;
  --color-footer-bg: #1A234D;
  --base-font-size: 16px;
  --base-font-sm-size: 14px;
  --base-font-xs-size: 12px;
  --base-font-lg-size: 18px;
}

body {
  display: flex;
  flex-direction: column;
  height: 100vh;
  font-family: Microsoft JhengHei;
  overflow-x: hidden;
  overflow-y: auto;
  line-height: 1.5;
  position: relative;
}

@media (orientation: landscape) {
  body {
    width: 100vw;
  }
}

body.load {
  overflow: hidden;
}

body.load::before {
  content: "";
  position: fixed;
  top: 0;
  bottom: 0;
  right: 0;
  left: 0;
  z-index: 6666;
  display: block;
  background: url(./../images/preloader.svg) center / 64px no-repeat #cccccc85;
}

h1.h1 {
  font-size: 60px;
}

h1.h1 span {
  font-size: 30px;
  line-height: 90px;
  vertical-align: top;
  padding: 0 5px;
}

h2.h2 {
  font-size: 48px;
  color: var(--color-normal);
  font-weight: bold;
  margin: 0 0 48px 0;
}

h3.h3 {
  font-size: var(--base-font-size);
  font-weight: bold;
}

.main-container {
  box-sizing: border-box;
  max-width: 1280px;
  width: 100%;
  margin: 67px auto auto auto;
  margin-bottom: 48px;
  flex: 1 0;
  padding-top: 40px;
}

.main-container>section:not(:nth-child(1)) {
  margin-top: 128px;
}

.introduceSection {
  height: 600px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;

}

.introduceSection>div:first-child {
  flex: 0 0 647px;
  align-self: center;
}

.introduceSection>div:last-child {
  flex: 0 0 633px;
}

.introduceSection .h1 {
  color: var(--color-hover);
  margin: 0 0 24px 0;
}

.introduceSection p {
  color: var(--color-normal);
  font-size: 24px;
  margin: 0;
}

.linear-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: 128px;
  height: 45px;
  border-radius: 90px;
  background: linear-gradient(90deg, #78D6FF, #0E4EFF);
  font-weight: bold;
  position: relative;
}

.linear-button::before {
  content: attr(text);
  color: var(--color-normal);
  background-color: #fff;
  border-radius: 90px;
  transition: all .3s;
  width: 120px;
  height: 37px;
  line-height: 37px;
  text-align: center;
}

.linear-button:hover::before {
  background-color: transparent;
  color: #fff;
  transition: all .2s;
}

.container-fluid {
  overflow: hidden;
}

.container-fluid>div {
  overflow: hidden;
  width: 100%;
  position: absolute;
  left: 0;
}

@media screen and (max-width: 1280px) {
  .main-container {
    padding: 40px 15px 0 15px;
  }

  .introduceSection {
    height: auto;
  }

  .introduceSection>div:first-child {
    flex: 1 0 100%;
    align-self: start;
    margin-bottom: 15px;
  }

  .introduceSection>div:last-child {
    flex: 0 0 100%;
    max-width: 633px;
    background: none;
  }

  .introduceSection>div:last-child::after {
    content: "";
    display: block;
    padding-top: 100%;
    width: 100%;
  }
}

@media screen and (max-width: 600px) {
  .introduceSection>div:last-child {
    background-size: cover !important;
  }
}

@media screen and (max-width: 480px) {
  .header-wrap>.left {
    width: 106px;
    height: 66px;
    background: url(./../images/logo_nav_mobile.png) center / contain no-repeat;
  }
  h1.h1 {
    font-size: 48px;
  }
  h2.h2 {
    font-size: 40px;
  }
  h1.h1 span {
    line-height: 73px;
  }

}