/* Reset some basic styles */
body,
h1,
p,
nav,
header,
section {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
a {
  text-decoration: none;
  color: inherit;
}

body,
html {
  background-color: #000;
  width: 100%;
  height: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: Arial, sans-serif;
  background-color: #000; /* Black background color */
  /* background: url("../img/background.png") no-repeat top center; */
  background-size: cover;
  color: #fff;
}

.toy {
  position: fixed;
  left: 0;
  bottom: 0;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
  /* 加下下边框 */
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}
.tubiao_logo {
  display: flex;
  color: #fff;
  font-size: 24px;
  font-style: normal;
  font-weight: 700;
  line-height: normal;
  letter-spacing: 2px;
  align-items: center;
}

.logo img {
  width: 40px;
  margin-right: 10px;
}

.menu {
  display: flex;
}

.menu a {
  color: #fff;
  text-decoration: none;
  margin-right: 20px;
  padding: 10px;
  font-size: 18px;
  border-radius: 8px;
  background: none;
}

.menu a.active {
  border-radius: 8px;
  background: var(---1, linear-gradient(270deg, #6DF9E3 0%, #50E5A7 100%));
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 24px;
}

.details {
  max-width: 1300px;
  margin: 40px auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: calc(100% - 60px); /* Adjust height considering header height */
}
.common-artilce {
  display: flex;
  flex-direction: column;
  background: rgba(0, 0, 0, 0.6);
  margin: 5% 3%;
  margin-bottom: 100px;
  border-radius: 10px;
  justify-content: space-between;
  line-height: 1.5;
  font-size: 20px;
  color: rgba(255, 255, 255, 0.8);
  padding: 5% 3%;
}

.common-artilce .section-title{
  width: 100%;
  font-size: 32px;
  font-weight: bold;
  text-align: start;
  padding: 20px 0;
  color: #FFF;
  margin-bottom: 20px;
}

.common-artilce p{
  margin-bottom: 10px;
}

.introduction {
  max-width: 50%;
  text-align: left;
}

.introduction h1 {
  font-size: 64px;
  background-image: var(---1, linear-gradient(270deg, #6DF9E3 0%, #50E5A7 100%));;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.introduction h1 span {
  color: #ffa500;
}

.introduction p {
  font-size: 20px;
  margin-top: 20px;
  color: #999;
}

.app-showcase {
  text-align: right;
  padding-bottom: 50px;
}

.app-showcase img {
  max-width: 90%;
  height: auto;
}


.history_box{
  max-width: 1300px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 36px;
  margin-bottom: 36px;
}
.history_box  .car-item_box .header {
  width: 100%;
  height: 230px;
}
.history_box .car-item_box .header img {
  width: 100%;
  height: 100%;
}

.history_box .main_1{
  background: radial-gradient(circle at top left, #1F5488, #3D8088);
}
.history_box .main_2{
  background: radial-gradient(circle at top left, #6A529F, #9379B7);
}

.history_box .main_3{
  background: radial-gradient(circle at top left, #276ACB, #219FC6);
}

.history_box .main {
  padding: 16px;
  border-bottom-right-radius: 16px;
  border-bottom-left-radius: 16px;
  overflow: hidden;
  height: 220px;
  display: flex;
  align-items: center;
  flex-direction: column;
  justify-content: center;
}
.history_box span {
  display: inline-block;
  line-height: 24px;
  font-size: 16px;
}
.copyright {
  position: fixed;
  bottom: 0;
  right: 0;
  padding: 10px; /* 内边距 */
}


.footer-contact {
  background-color: #000;
  padding: 20px;
  text-align: center;
  color: #999;
}
.footer-contact h3 {
  font-size: 24px;
  margin-bottom: 15px;
}
.contact-info {
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
}
.contact-item {
  margin: 10px;
  flex-basis: 30%;
}
.contact-item h4 {
  font-size: 18px;
  margin-bottom: 10px;
}
.contact-item p {
  font-size: 14px;
}
@media (max-width: 768px) {
  .contact-info {
    flex-direction: column;
    align-items: center;
  }
  .contact-item {
    flex-basis: 100%;
  }
  .history_box{
    padding: 20px;
    display: grid;
    grid-template-columns: repeat(1,1fr);
    gap: 36px;
    margin-bottom: 36px;
  }
}

@media (max-width: 768px) {
  .menu {
    display: none;
    flex-direction: column;
    background-color: rgba(0, 0, 0, 0.9); /* semi-transparent background */
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    padding: 0 0 30px 0;
    width: 100%;
  }

  .menu.active {
    display: flex;
  }

  .menu a {
    display: block;
    margin: 0;
    border-radius: 0;
    text-align: center;
  }

  .menu-toggle {
    display: block;
  }

  .logo {
    text-align: center;
    font-size: 24px;
  }

  .details {
    flex-direction: column;
    align-items: center;
  }

  .introduction h1 {

    margin-top: 50px;
    font-size: 32px;
    color: #fff;
  }

  .introduction,
  .app-showcase {
    max-width: 90%;
    text-align: start;
  }
  .app-showcase {
    margin-top: 50px;
  }

  .introduction p {
    font-size: 16px;
  }

  .common-artilce .section-title{
    font-size: 24px;
  }
}
