body * {
  box-sizing: border-box;
  flex-shrink: 0;
}
html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow-x: hidden;
  font-family: PingFangSC-Regular, Roboto, Helvetica Neue, Helvetica, Tahoma,
    Arial, PingFang SC-Light, Microsoft YaHei;
}

/* 统一让页面主体撑满视口，底部栏贴底 */
.group_1.flex-col {
  min-height: 100vh;
}

.group_1.flex-col .group_9,
.group_1.flex-col .group_10 {
  margin-top: auto;
}

a {
  text-decoration: none;
}
input {
  background-color: transparent;
  border: 0;
}
button {
  margin: 0;
  padding: 0;
  border: 1px solid transparent;
  outline: none;
  background-color: transparent;
}

button:active {
  opacity: 0.6;
}
.flex-col {
  display: flex;
  flex-direction: column;
}
.flex-row {
  display: flex;
  flex-direction: row;
}
.justify-start {
  display: flex;
  justify-content: flex-start;
}
.justify-center {
  display: flex;
  justify-content: center;
}

.justify-end {
  display: flex;
  justify-content: flex-end;
}
.justify-evenly {
  display: flex;
  justify-content: space-evenly;
}
.justify-around {
  display: flex;
  justify-content: space-around;
}
.justify-between {
  display: flex;
  justify-content: space-between;
}
.align-start {
  display: flex;
  align-items: flex-start;
}
.align-center {
  display: flex;
  align-items: center;
}
.align-end {
  display: flex;
  align-items: flex-end;
}

.nav-dropdown {
  position: relative;
  display: flex;
  align-items: center;
  margin-left: 1.2rem;
}

.nav-dropdown::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  height: 0.16rem;
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  margin-top: 0.16rem;
  left: 50%;
  transform: translateX(-50%);
  min-width: 4.8rem;
  padding: 0.16rem 0;
  background: #ffffff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  border-radius: 0.16rem;
  display: none;
  z-index: 10;
}

.nav-dropdown-menu a {
  display: block;
  padding: 0.16rem 0.4rem;
  font-size: 0.32rem;
  color: rgba(0, 102, 204, 1);
  white-space: nowrap;
}

.nav-dropdown-menu a:hover {
  background-color: rgba(0, 102, 204, 0.08);
}

.nav-dropdown:hover .nav-dropdown-menu {
  display: block;
}