.flex {
  display: flex; }
  .flex-item {
    flex: 1; }
  .flex-column {
    flex-direction: column; }

.align-center {
  align-items: center; }

.justify-center {
  justify-content: center; }

.justify-between {
  justify-content: space-between; }

.banner {
  width: 100%; }
  .banner img {
    vertical-align: top;
    width: 100%;
    max-width: 100%; }

.footer {
  text-align: center;
  background-color: #333;
  color: #fff;
  line-height: 1.5; }
  .footer p {
    margin: 0; }
  .footer a {
    text-decoration: none;
    color: #fff; }

@media screen and (max-width: 768px) {
  .desktop {
    display: none; }
  .mobile {
    display: block; }
  .header {
    display: flex;
    align-items: center;
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    height: 15vw;
    background-color: rgba(0, 0, 0, 0.6); }
    .header .logo {
      height: 12vw;
      margin-left: 3vw; }
  .container {
    position: relative;
    z-index: 1;
    margin-top: -5vw;
    border-top-left-radius: 5vw;
    border-top-right-radius: 5vw;
    background-color: #fff; }
  .list {
    padding: 5vw;
    margin: 0;
    list-style: none;
    font-size: 3.75vw; }
    .list .item {
      margin-bottom: 5vw;
      border-bottom: 1px solid #eee; }
    .list .head {
      margin-bottom: 3vw; }
      .list .head .text {
        padding: 1vw 0;
        align-self: stretch; }
    .list .icon {
      width: 13.5vw;
      height: 13.5vw;
      margin-right: 3vw; }
    .list .title {
      font-weight: bold; }
    .list .hot {
      display: flex;
      align-items: center;
      color: #9b1f87;
      font-weight: bold;
      font-size: 4.5vw;
      line-height: 1; }
      .list .hot img {
        vertical-align: middle;
        width: 4.5vw;
        margin-right: 1vw; }
      .list .hot span {
        font-weight: bold;
        transform: scale(0.6) translate(-0.7vw, 0.6vw); }
    .list .btn {
      padding: 1.5vw 3vw 2vw;
      border-radius: 1.5vw;
      text-decoration: none; }
    .list .web {
      box-shadow: inset 0 0 0 1px #414393;
      color: #414393; }
    .list .down {
      background: linear-gradient(90deg, #ff3088, #9b1f87);
      color: #fff; }
    .list .pic {
      width: 100%;
      vertical-align: top; }
    .list .desc {
      padding: 3.75vw 0;
      color: #666;
      font-size: 3.75vw; }
  .footer {
    padding: 3vw 0; } }

@media screen and (min-width: 768px) {
  .mobile {
    display: none; }
  .desktop {
    display: block; }
  .header {
    display: flex;
    align-items: center;
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    height: 66px;
    background-color: rgba(0, 0, 0, 0.6); }
    .header .logo {
      margin-left: 70px; }
  .container {
    width: 1200px;
    min-width: 1200px;
    margin: 0 auto; }
  .list {
    list-style: none;
    padding: 0;
    margin: 0; }
    .list .item {
      display: flex;
      margin: 125px 0 150px; }
      .list .item:nth-child(odd) .info {
        margin-left: 45px; }
      .list .item:nth-child(even) {
        flex-flow: row-reverse; }
        .list .item:nth-child(even) .info {
          margin-right: 45px; }
    .list .info {
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: stretch; }
    .list .pic {
      vertical-align: top;
      width: 550px;
      height: 375px;
      border-radius: 15px;
      overflow: hidden;
      box-shadow: 0 10px 10px rgba(0, 0, 0, 0.3); }
    .list .title, .list .subtitle {
      font-weight: bold; }
    .list .title {
      line-height: 80px;
      font-size: 38px; }
    .list .subtitle {
      line-height: 46px;
      font-size: 20px; }
    .list .desc {
      flex: 1;
      margin-top: 20px; }
      .list .desc .content {
        overflow: hidden;
        text-overflow: ellipsis;
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
        color: #878787;
        line-height: 1.5; }
    .list .group {
      display: flex; }
    .list .btn {
      display: block;
      padding: 14px 25px 15px;
      border-radius: 8px;
      text-decoration: none;
      font-size: 20px; }
    .list .web {
      box-shadow: inset 0 0 0 1px #414393;
      color: #414393;
      transition: all .3s ease-out; }
      .list .web:hover {
        background-color: #414393;
        color: #fff; }
    .list .down {
      margin-left: 18px;
      background: linear-gradient(90deg, #ff3088, #9b1f87);
      color: #fff; }
  .footer {
    padding: 20px 0;
    line-height: 2; } }