*{margin: 0;
padding: 0;
box-sizing: border-box;
}
ul,li{list-style: none;}
a{text-decoration: none;}
img{cursor: pointer;}
body{font: "微软雅黑";color: black;}
.nav{position: fixed;top: 0;left: 0;height: 60px;width: 100%;z-index: 9999;background: white;}
.nav-mian{display: flex; justify-content: space-between;width: 1400px;height: 60px;font-size: 24px;margin: 0 auto;}
.nav-logo {float: left;height: 60px; margin: 0 auto;}
.nav-logo img{height: 60px;}
.topmenu {
  display: flex;
  list-style: none;
}
.topmenu > li {
  position: relative; /* 关键点：二级菜单相对这个一级li定位 */
  margin-right:35px;
  margin-top: 10px;
  font-size:24px;
}
.topmenu > li > a{
  color:#000;
  text-decoration:none;
}
.topmenu > li > a:hover{
  color: darkgrey;
}

/* =====二级菜单样式===== */
.submenu {
  list-style: none;
  /* 默认隐藏 */
  display: none;
  position: absolute;
  left: 0;
  top: 100%; /* 紧贴一级菜单下方 */
  background:white ;
  width: 180px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
  padding: 8px 6px;
}
.submenu li a {
  display: block;
  padding: 8px 14px;
  font-size: 20px;
  color:#333;
  text-decoration:none;
}
/* 二级选项hover高亮，和截图灰色效果一致 */
.submenu li a:hover {
  background-color:#FDD5DC;
}
/* 悬浮一级li，显示二级下拉菜单 */
.topmenu > li:hover .submenu{
  display:block;
}
.banner{width: 100%;height: 685px;margin-top: 60px;position: relative;}
.banner img{width: 100%;height: 685px;display: none;}
.banner img:nth-of-type(1){display: block;}
.one{margin: 90px auto;width: 1400px;height: 750px;position: relative;}
.one-span {margin: 90px auto;width: 150px;display: block;position: relative;}
.one-span h3:nth-of-type(2){position: absolute;right: 25px; width: 150px;}
.se-one{width: 1400px;height: 640px;display: flex;flex-wrap: nowrap;gap:160px;margin: 0 auto;}
.se-one .one-1 img{width: 580px;height: 560px;}
.se-one .one-1 div{width: 580px; border: 1px solid black;height: 80px;}
.se-one .one-1 p{font-size: 12px;line-height: 20px;}
.se-one .one-2 img{width: 580px;height: 560px;}
.se-one .one-2 div{width: 580px; border: 1px solid black;height: 80px;}
.se-one .one-2 p{font-size: 12px;line-height: 25px;}
.two-span {margin: 90px auto;width: 150px;display: block;position: relative;}
.two-span h3:nth-of-type(2){position: absolute;right: 6px; width: 150px;}
.two-m{margin: 0 auto;}
.two-m img:nth-of-type(1){width: 100%;position: relative;bottom: 0;margin-top: 150px;}
.two-m .two-mian{display: flex;flex-wrap: nowrap;width: 1400px;height: 350px;gap:0px;position: absolute;top: 1650px;left: 210px;}
.two-m .two-mian img{width: 350px;height: 350px;border-radius: 50%;border: 10px solid white;transition: filter 0.3s ease;filter: blur(4px);m}
.two-m .two-mian div p{position: absolute;top: 450px;left: 120px;height: 30px;border: 3px solid white;display: none;font-weight: bold;}
.two-m .two-mian div:hover p{display: block;}
.two-m .two-mian div:nth-of-type(2) p{position: absolute;top: 450px;left: 460px;}
.two-m .two-mian div:nth-of-type(3) p{position: absolute;top: 450px;left: 820px;}
.two-m .two-mian div:nth-of-type(4) p{position: absolute;top: 450px;left: 1180px;}
.two-m .two-mian img:hover{filter: blur(0px);}
.three{width: 1400px; height: 600px;position: relative;background: #FDDFC4;margin: 0 auto;margin-bottom: 90px;}
.three img:nth-of-type(1){top: -100px;right: 30px;position: absolute;}
.three img:nth-of-type(2){width: 340px;height: 377px;position: absolute;bottom: 0;left: 0;}
.three img:nth-of-type(3){width: 160px;height: 170px;position: absolute;top: 0;left: 0;}
.three img:nth-of-type(4){position: absolute;bottom: 30px;right: 150px;z-index: 99;transition: all 0.3s ease;}
.three img:nth-of-type(4):hover{z-index: 199;transform: scale(1.1,1.1);}
.three img:nth-of-type(5){position: absolute;bottom: 130px;right: 450px;transition: all 0.3s ease;}
.three img:nth-of-type(5):hover{z-index: 199;transform: scale(1.1,1.1);}
footer div{width: 100%;height: 250px;background: #FDDFC4;display: flex;justify-content: center;align-items: center;}
footer p{width: 300px;text-align: center;margin-top: 40px;}