* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
:root {
  --main-color: #e70012;
  --bg-color: #0e4b9c;
  --hover-bgcolor: #33C9FB;
}
ul,
li {
  list-style: none;
}
a {
  text-decoration: none;
  color: #000;
}
input {
  outline: 0;
}
i,
em {
  font-style: normal;
}
.wrapper {
  width: 1200px;
  margin: 0 auto;
}
.bg-black {
  background-color: #333333;
}
.bg-white {
  background-color: #fff;
}
.text-white {
  color: #fff;
}
.f12 {
  font-size: 12px;
}
.f14 {
  font-size: 14px;
}
.f16 {
  font-size: 16px;
}
.f18 {
  font-size: 18px;
}
.f20 {
  font-size: 20px;
}
.f24 {
  font-size: 24px;
}
.f26 {
  font-size: 26px;
}
.f30 {
  font-size: 30px;
}
.f36 {
  font-size: 36px;
}
.font-bold {
  font-weight: 700;
}
/* ==================
          布局
 ==================== */
/*  -- flex弹性布局 -- */
.flex {
  display: flex;
}
.basis-xs {
  flex-basis: 20%;
}
.basis-sm {
  flex-basis: 40%;
}
.basis-df {
  flex-basis: 50%;
}
.basis-lg {
  flex-basis: 60%;
}
.basis-xl {
  flex-basis: 80%;
}
.flex-sub {
  flex: 1;
}
.flex-twice {
  flex: 2;
}
.flex-treble {
  flex: 3;
}
.flex-direction {
  flex-direction: column;
}
.flex-wrap {
  flex-wrap: wrap;
}
.align-start {
  align-items: flex-start;
}
.align-end {
  align-items: flex-end;
}
.align-center {
  align-items: center;
}
.align-stretch {
  align-items: stretch;
}
.self-start {
  align-self: flex-start;
}
.self-center {
  align-self: flex-center;
}
.self-end {
  align-self: flex-end;
}
.self-stretch {
  align-self: stretch;
}
.align-stretch {
  align-items: stretch;
}
.justify-start {
  justify-content: flex-start;
}
.justify-end {
  justify-content: flex-end;
}
.justify-center {
  justify-content: center;
}
.justify-between {
  justify-content: space-between;
}
.justify-around {
  justify-content: space-around;
}
/*  -- 内外边距 -- */
.margin-0 {
  margin: 0;
}
.margin-xs {
  margin: 10px;
}
.margin-sm {
  margin: 20px;
}
.margin {
  margin: 30px;
}
.margin-lg {
  margin: 40px;
}
.margin-xl {
  margin: 50px;
}
.margin-top-xs {
  margin-top: 10px;
}
.margin-top-sm {
  margin-top: 20px;
}
.margin-top {
  margin-top: 30px;
}
.margin-top-lg {
  margin-top: 40px;
}
.margin-top-xl {
  margin-top: 50px;
}
.margin-right-xs {
  margin-right: 10px;
}
.margin-right-sm {
  margin-right: 20px;
}
.margin-right {
  margin-right: 30px;
}
.margin-right-lg {
  margin-right: 40px;
}
.margin-right-xl {
  margin-right: 50px;
}
.margin-bottom-xs {
  margin-bottom: 10px;
}
.margin-bottom-sm {
  margin-bottom: 20px;
}
.margin-bottom {
  margin-bottom: 30px;
}
.margin-bottom-lg {
  margin-bottom: 40px;
}
.margin-bottom-xl {
  margin-bottom: 50px;
}
.margin-left-xs {
  margin-left: 10px;
}
.margin-left-sm {
  margin-left: 20px;
}
.margin-left {
  margin-left: 30px;
}
.margin-left-lg {
  margin-left: 40px;
}
.margin-left-xl {
  margin-left: 50px;
}
.margin-lr-xs {
  margin-left: 10px;
  margin-right: 10px;
}
.margin-lr-sm {
  margin-left: 20px;
  margin-right: 20px;
}
.margin-lr {
  margin-left: 30px;
  margin-right: 30px;
}
.margin-lr-lg {
  margin-left: 40px;
  margin-right: 40px;
}
.margin-lr-xl {
  margin-left: 50px;
  margin-right: 50px;
}
.margin-tb-xs {
  margin-top: 10px;
  margin-bottom: 10px;
}
.margin-tb-sm {
  margin-top: 20px;
  margin-bottom: 20px;
}
.margin-tb {
  margin-top: 30px;
  margin-bottom: 30px;
}
.margin-tb-lg {
  margin-top: 40px;
  margin-bottom: 40px;
}
.margin-tb-xl {
  margin-top: 50px;
  margin-bottom: 50px;
}
.padding-0 {
  padding: 0;
}
.padding-xs {
  padding: 10px;
}
.padding-sm {
  padding: 20px;
}
.padding {
  padding: 30px;
}
.padding-lg {
  padding: 40px;
}
.padding-xl {
  padding: 50px;
}
.padding-top-xs {
  padding-top: 10px;
}
.padding-top-sm {
  padding-top: 20px;
}
.padding-top {
  padding-top: 30px;
}
.padding-top-lg {
  padding-top: 40px;
}
.padding-top-xl {
  padding-top: 50px;
}
.padding-right-xs {
  padding-right: 10px;
}
.padding-right-sm {
  padding-right: 20px;
}
.padding-right {
  padding-right: 30px;
}
.padding-right-lg {
  padding-right: 40px;
}
.padding-right-xl {
  padding-right: 50px;
}
.padding-bottom-xs {
  padding-bottom: 10px;
}
.padding-bottom-sm {
  padding-bottom: 20px;
}
.padding-bottom {
  padding-bottom: 30px;
}
.padding-bottom-lg {
  padding-bottom: 40px;
}
.padding-bottom-xl {
  padding-bottom: 50px;
}
.padding-left-xs {
  padding-left: 10px;
}
.padding-left-sm {
  padding-left: 20px;
}
.padding-left {
  padding-left: 30px;
}
.padding-left-lg {
  padding-left: 40px;
}
.padding-left-xl {
  padding-left: 50px;
}
.padding-lr-xs {
  padding-left: 10px;
  padding-right: 10px;
}
.padding-lr-sm {
  padding-left: 20px;
  padding-right: 20px;
}
.padding-lr {
  padding-left: 30px;
  padding-right: 30px;
}
.padding-lr-lg {
  padding-left: 40px;
  padding-right: 40px;
}
.padding-lr-xl {
  padding-left: 50px;
  padding-right: 50px;
}
.padding-tb-xs {
  padding-top: 10px;
  padding-bottom: 10px;
}
.padding-tb-sm {
  padding-top: 20px;
  padding-bottom: 20px;
}
.padding-tb {
  padding-top: 30px;
  padding-bottom: 30px;
}
.padding-tb-lg {
  padding-top: 40px;
  padding-bottom: 40px;
}
.padding-tb-xl {
  padding-top: 50px;
  padding-bottom: 50px;
}
.border-animate {
  position: relative;
  transition: 0.5s;
}
.border-animate::before {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  width: 20px;
  height: 10px;
  border-top: 2px solid #f00;
  border-left: 2px solid #f00;
  transition: 0.5s;
  transition-delay: 0.5s;
}
.border-animate::after {
  content: '';
  position: absolute;
  bottom: -1px;
  right: -1px;
  width: 20px;
  height: 10px;
  border-right: 2px solid #f00;
  border-bottom: 2px solid #f00;
  transition: 0.5s;
  transition-delay: 0.5s;
}
.border-animate:hover::before,
.border-animate:hover::after {
  width: 100%;
  height: 100%;
  transition-delay: 0s;
}
.border-animate:hover {
  transition-delay: 0.3s;
}
.title-hd {
  width: fit-content;
  height: 46px;
  font-size: 24px;
  line-height: 46px;
  color: #000;
  border-bottom: 4px solid var(--main-color);
  margin: 0 auto 50px;
}
.title-hd.white {
  color: #fff;
}
.banner-wrapper {
  position: relative;
}
.banner-wrapper img {
  display: block;
  width: 100%;
  height: 260px;
  object-fit: cover;
}
.banner-wrapper .wrapper {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 32px;
  color: #fff;
}