*{
    margin: 0;
    padding: 0;
    list-style: none;
    text-decoration: none;
}
body{
    background-color: #f7f7f7;
}

nav{
    width: 100%;
    height: 40px;
    background-color: #014090;
}
.w{
    width: 1200px;
}
.nav{
    margin: 0px auto;
    height: inherit;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.nav_right>ul{
    width: 400px;
    height: inherit;
    display: flex;
    justify-content: space-around;
    align-items: center;
    color: white;
    font-size: 14px;
}
 
.nav_right>ul>li:nth-child(1){
    text-decoration: underline;
}
.banner {
    position: relative;
    width: 100%;
    height: 400px;
    /* 按需改高度 */
    overflow: hidden;
}

.slide {
    position: absolute;
    inset: 0;
    /* top/left/right/bottom=0 */
    background: center/cover no-repeat;
    opacity: 0;
    animation: fade 20s infinite;
}

.slide.active {
    /* 首帧立即显示 */
    opacity: 1;
    animation: none;
    /* 不参与循环 */
}

/* 4 张图，各 5 秒 = 20s 周期 */
.slide:nth-child(2) {
    animation-delay: 5s;
}

.slide:nth-child(3) {
    animation-delay: 10s;
}

.slide:nth-child(4) {
    animation-delay: 15s;
}

@keyframes fade {
    0% {
        opacity: 0;
    }

    5% {
        opacity: 1;
    }

    /* 淡入 1s */
    25% {
        opacity: 1;
    }

    /* 停留 4s */
    30% {
        opacity: 0;
    }

    /* 淡出 1s */
    100% {
        opacity: 0;
    }
}
section{
    margin: 20px auto;
    padding: 20px;
    box-sizing: border-box;
    
}
.sone{
    width: 100%;
    margin-bottom: 40px;
}
.sone-title{
    color: #4a4a4a;
    font-size: 22px;
    font-weight: bold;
    margin-bottom: 20px;
}
.sonemain{
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    margin-top: 20px;
    background-color: white;
    padding: 20px 10px;
    box-sizing: border-box;
}
.sonemain>div{
    width: 20%;
    margin-bottom: 20px;
    text-align: center;
}
.sonemain>div>img{
    width: 80%;
}

  table {
      width: 100%;
      border-collapse: collapse;
      text-align: center;
  }

  table th,
  table td {
      border: 1px solid #ccc;
      padding: 12px;
  }

  table th {
      background-color: #004b93;
      color: #fff;
  }

  table td {
      background-color: #4186d6;
      color: #fff;
  }

  /* 版心容器 */
  .tablebox {
      width: 100%;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 1px;
      /* 块之间的分隔线 */
  }

  /* 行容器 */
  .row {
      display: flex;
      height: 60px;
  }

  /* 不同深度的蓝色块样式 */
  .item {
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      padding: 0 15px;
      font-size: 14px;
      border-radius: 2px;
      margin-right:2px ;
  }

  .dark-blue {
      background-color: #0a4da2;
  }

  .medium-blue {
      background-color: #1e6bc8;
  }

  .light-blue {
      background-color: #3584e4;
  }

  /* 第一行各元素宽度 */
  .row-1 .item:nth-child(1) {
      width: 15%;
  }

  .row-1 .item:nth-child(2) {
      width: 12%;
  }

  .row-1 .item:nth-child(3) {
      width: 15%;
  }

  .row-1 .item:nth-child(4) {
      width: 15%;
  }

  .row-1 .item:nth-child(5) {
      width: 15%;
  }

  .row-1 .item:nth-child(6) {
      width: 10%;
  }

  .row-1 .item:nth-child(7) {
      width: 18%;
  }

  /* 第二行各元素宽度 */
  .row-2 .item:nth-child(1) {
      width: 10%;
  }

  .row-2 .item:nth-child(2) {
      width: 10%;
  }

  .row-2 .item:nth-child(3) {
      width: 18%;
  }

  .row-2 .item:nth-child(4) {
      width: 10%;
  }

  .row-2 .item:nth-child(5) {
      width: 10%;
  }

  .row-2 .item:nth-child(6) {
      width: 18%;
  }

  .row-2 .item:nth-child(7) {
      width: 10%;
  }

  .row-2 .item:nth-child(8) {
      width: 14%;
  }
  .stwo{
    width: 100%;
    margin: 30px auto;
  }

  .stwomain{
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    margin-top: 30px;
}
.stwoitem{
    width: 50%;
    display: flex;
    margin-bottom: 20px;
    gap: 10px;
    padding: 20px;
    box-sizing: border-box;
    background: #fff;
    border-bottom: 2px solid #e5e5e5;
}

.stwoitem img{
    width: 300px;
    height: 200px;
}

.stwo-title{
    font-weight: 700;
}
.stwo-text{
    font-size: 14px;
    line-height: 30px;
    /* margin-top: 10px; */
    color: #707070;
}

.stwomain>.stwoitem:nth-child(2n-1) {
    border-right: 2px solid #e5e5e5;
}
.sthreeMain{
    width: 100%;
    padding: 30px;
    box-sizing: border-box;
    background-color: white;
    margin: 30px auto;
    color: #505050;
    text-indent: 2em;
}
.sfourMain{
    width: 100%;
    padding: 30px;
    box-sizing: border-box;
    background-color: white;
    display: flex;
    gap: 10px;
}


 .sfouritem{
     width: 20%;
     background-color: white;
     border-radius: 10px;
     overflow: hidden;
 }

 .map-image {
     width: 100%;
     background-color: #e8f0fe;
     overflow: hidden;
     position: relative;
 }

 .map-image img {
     width: 100%;
     height: 100%;
     object-fit: cover;
     display: block;
  
 }

.sfour{
    margin-bottom: 30px;
}
 .sfourcontent .title {
     font-size:18px;
     margin-top: 30px;
     color: #2c3e50;
     margin-bottom: 20px;
     font-weight: 600;
     padding-left: 15px;
 }

 .sfourcontent .features {
     list-style-type: none;
 }

 .sfourcontent .features li {
     font-size: 12px;
     color: #585858;
     margin-bottom: 12px;
     padding-left: 24px;
     position: relative;
     line-height: 1.6;
 }

.sfourcontent  .features li:before {
     content: "•";
     color: #585858;
     font-size: 12px;
     position: absolute;
     left: 0;
     top: -2px;
 }
 .sfivebox{
    width: 100%;
    padding: 20px;
    background-color: white;
    display: flex;
    justify-content: space-between;
    box-sizing: border-box;
 }
 .sfivebox .fiveleft{
    width: 60%;
}
.sfltitle{
    font-weight: bold;
    font-size: 14px;
}
.sfttext{
    font-size: 12px;
    color: #8e8e8e;
    margin: 20px 0px;
}
.sfthree{
    color: #2c5c9f;
    padding-left: 20px;
    margin-bottom: 30px;
}
.sfivebox ol li{
    padding-left: 30px;
    font-size: 12px;color: #8e8e8e;
    line-height: 30px;
}
.fiveright{
    width: 25%;
}
.fiveright img{
    width: 50%;
    display: block;
    margin: 20px auto;
}
.fiveright ul li{
    text-decoration: underline;
    font-size: 13px;
    color: #4b6ba5;
    line-height: 40px;
}
footer{
    width: 100%;
    margin-top: 50px;
    background-color: #fff;
}
.footer{
    width: 1200px;
    padding: 20px;
    box-sizing: border-box;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
}
.fitem{
    width: 50%;
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}
.fitem img{
    width: 40px;
    height: 40px;
}

.firtitle{
    color: #373737;
}
.firtext{
    color: #9a9a9a;
    font-size: 12px;
}
.lastbox{
    background-color: #013f90;
    height: 40px;
    line-height: 40px;
    text-align: center;
    font-size: 12px;
    color: white;
}