* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
 
html {
  font-size: 62.5%;
  font-family: "Roboto", sans-serif;
  /*-webkit-filter: grayscale(.95);*/
}
 
 
li {
  list-style: none;
}
 
a {
  text-decoration: none;
}
 
 
.img{
  z-index:999;
  height:40px;
  width:40px;
  object-fit:cover;
  border-radius:50%;
}
 
.header {
}

.navbar {
z-index: 999;
height: 50px;
width: 100%;
position: fixed;
top: 0;
margin: 0;
text-decoration: none;
text-align: center;
display: flex;
align-items: center;
padding: 1rem 1.5rem;
justify-content: space-between;
}
 
.bar {
z-index: 999;
background-color: rgb(236, 241, 236,0.5); 
  display: block;
  width: 25px;
  height: 3px;
  margin: 5px auto;
  -webkit-transition: all 0.3s ease-in-out;
  transition: all 0.3s ease-in-out;
  background-color: #101010;
}
 
.hamburger {
  display: none;
}
 
.nav-menu {
  z-index:999;
   display: flex;
  justify-content: space-between;
  align-items: center;
}
 
.nav-item {
  margin-left: 5rem;
}
 
.nav-link {
  font-size: 1.6rem;
  font-weight: 400;
  color: #fff;
  font-weight:900;
}
 
.nav-link:hover {
  color: #ff5c6bc0;
  
}
 
.nav-logo {
  font-size: 2.1rem;
  font-weight: 500;
}
 
@media only screen and (max-width: 768px) {
.navbar {
background-color: rgb(236, 241, 236,0.5); 
}
 
  .nav-menu {
  z-index: 999;
background-color: rgb(236, 241, 236,0.5); 
    position: fixed;
    left: -100%;
    top: 5rem;
    flex-direction: column;
    background-color: #fff;
    width: 100%;
    border-radius: 10px;
    text-align: center;
    transition: 0.3s;
    box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
  }
  
    .nav-menu.active {
z-index: 999;
background-color: rgb(255,255,255); 
left: 0;
  }
 
  .nav-item {
  z-index:999;
    margin: 2.5rem 0;
  }
 .nav-link {
  font-size: 1.6rem;
  font-weight: 400;
  color: #ff5c6bc0;
  font-weight:900;
}
 
.nav-link:hover {
  color: #fff;
  
}
  .hamburger {
    display: block;
    cursor: pointer;
    color: #fff;
  }
 
  .hamburger.active .bar:nth-child(2) {
    opacity: 0;
    color: #fff;
  }
 
  .hamburger.active .bar:nth-child(1) {
    -webkit-transform: translateY(8px) rotate(45deg);
    transform: translateY(8px) rotate(45deg);
    color: #fff;
  }
 
  .hamburger.active .bar:nth-child(3) {
    -webkit-transform: translateY(-8px) rotate(-45deg);
    transform: translateY(-8px) rotate(-45deg);
    color: #fff;
  }
}
.image{
border-radius:1px;
object-fit: contain;
max-width:100%;
max-height:100%;
width:auto;
align:center;
height:auto;
} 

/* 标题 */
.title {
text-align: center;
color: white;
text-shadow: 5px 5px 5px rgb(0 0 0 / 50%);
}
.background {
background: linear-gradient(rgba(0, 0, 0, 0), rgba(0, 0, 0, 0)), url(https://s1.ax1x.com/2022/12/22/zXJXDA.png) center center no-repeat;
background-size: cover;      /* 覆盖:图片成比例填满盒子。可用于适配 */
background-repeat:no-repeat;
max-width:100%;
height: 1010px;
display: flex;
align-items: center;
flex-direction: column-reverse;
justify-content: center;
}


.d {
background-color: #5c6bc0;
border-radius: 8px;
border: none;
color: white;
padding: 12px 18px;
text-align: center;
text-decoration: none;
display: inline-block;
font-size: 16px;
}
.w {
text-align: center;
text-decoration: none;
border: none;
color: white;
}

/* hi */
.介绍 {
    -ms-flex: 70%;
    flex: 70%;
    background-color: white;
    padding: 80px 90px 60px;
}
@media (max-width: 700px){
.介绍 {
    -ms-flex: 70%;
    flex: 70%;
    background-color: white;
    padding: 80px 20px 20px;
}
}

.介绍 img {
    border-radius: 5px;
    /* object-fit: contain; */
    max-width: 100%;
    max-height: 100%;
    max-width: 100%;
    height: auto;
}
@media (max-width: 900px){
.介绍 img {
max-height: 100%;
border-radius: 4px;
}
}
.g1 {
    padding-right: 20px;
    padding-left: 20px;
}
.h {
    height: 0%;
}
.section-title {
font-size:30px;margin-top:3rem;
}


.left-text {
    font-weight: 400;
    font-size: 16px;
    color: #777;
    line-height: 28px;
    letter-spacing: 1px;
    height: 0%;
}
/* 底部 */
.footer {
    padding: 20px;
    text-align: center;
    background: #ddd;
}