* {
  margin: 0;
  padding: 0;
  text-decoration: none;
  list-style: none;
  box-sizing: border-box;
}

body {
  font-family: "SourceHanSansCN", "Microsoft YaHei", "PingFang SC";
  margin: 0;
}

/* flex布局 */
.flex {
  display: flex;
}

/* 纵向排列 */
.flex_c {
  display: flex;
  flex-direction: column;
}

/* 水平居中 */
.j_center {
  display: flex;
  justify-content: center;
}

/* 两端对齐 */
.j_btween {
  display: flex;
  justify-content: space-between;
}

.j_evenly {
  display: flex;
  justify-content: space-evenly;
}

/* 垂直居中 */
.a_center {
  display: flex;
  align-items: center;
}

/* 靠底 */
.a_start {
  display: flex;
  align-items: flex-start;
}


/* 靠底 */
.a_end {
  display: flex;
  align-items: flex-end;
}

.j_end {
  display: flex;
  justify-content: flex-end;
}

/* 字内容绝对居中 */
.j_a_center {
  display: flex;
  justify-content: center;
  align-items: center;
}

.flex_c_r {
  display: flex;
  flex-direction: column-reverse;
}

/* flex:1 */
.flex_full {
  flex: 1;
}

/* flex_wrap */
.flex_wrap {
  flex-wrap: wrap;
}

.font-b {
  font-weight: bold;
}

.black {
  color: #303133;
}

.gray {
  color: #606266;
}

.white {
  color: white;
}

.blue {
  color: #3F86FA;
}

.lighter {
  font-weight: lighter;
}


nav{
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  height: 80px;
  background: none;
  z-index: 9;
}
.bgw{
  background: #fff;
}
/* 导航栏 */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}
.w1200{
  max-width: 1200px;
  margin: 0 auto;
}
.logo {
  font-size: 20px;
  font-weight: bold;
  color: #6a4cff;
}
.nav-links a {
  margin-left: 32px;
  font-weight: bold;
  font-size: 18px;
  color: #212128;
  display: inline-block;
  width: 100px;
  text-align: center;
  margin-left: 20px;
}


/* 页脚 */
.footer {
  background: #2d3748;
  text-align: center;
  font-size: 12px;
  padding: 12px 0;

}
.footer p{
  width: 1200px;
  margin: 0 auto;
  color: #999999;font-size: 16px;
}