body {
  box-sizing: border-box;
  position: relative;
  min-height: 100vh;
  background: #ffffff !important;
}

/*===========================字体==========================*/
.text-xs {
  font-size: 0.75rem; /* 12px */
  line-height: 1rem; /* 16px */
}
.text-sm {
  font-size: 0.875rem; /* 14px */
  line-height: 1.25rem; /* 20px */
}
.text-base {
  font-size: 1rem; /* 16px */
  line-height: 1.5rem; /* 24px */
}
.text-lg {
  font-size: 1.125rem; /* 18px */
  line-height: 1.75rem; /* 28px */
}
.text-xl {
  font-size: 1.25rem; /* 20px */
  line-height: 1.75rem; /* 28px */
}
.text-2xl {
  font-size: 1.5rem; /* 24px */
  line-height: 2rem; /* 32px */
}
.text-3xl {
  font-size: 1.875rem; /* 30px */
  line-height: 2.25rem; /* 36px */
}
.text-4xl {
  font-size: 2.25rem; /* 36px */
  line-height: 2.5rem; /* 40px */
}
.lineheight20 {
  line-height: 2;
}
.lineheight24 {
  line-height: 2.5;
}
.lineheight30 {
  line-height: 3;
}
.lineheight36 {
  line-height: 3.6;
}

.mobile-el {
  display: none;
}