* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  width: 100%;
  background-color: #ffffff;
  min-height: 100vh;
  /* 移除 flex 居中属性 */
}

.container {
  width: 100%;
  margin: 0 auto;
  position: relative;


}

.bgImg {
  position: absolute;
  width: 100%;
  height: 1380px;
  top: 0;
  left: 0;
  z-index: -1;
}

.bgImg div {
  position: absolute; /* 内部 div 绝对定位 */
  width: 100%;
  top: 0;
  left: 0;
  /* 以下是示例背景样式（可自定义） */
  background-size: cover;
  background-position: center;
}

/* 示例：为三个 div 设置不同背景（可选） */
.bgImg div:nth-child(1) {
    height: 1240px;
}
.img1{
      width: 100%;
    height: 1242px ;
}
.bgImg div:nth-child(2) {
     height: 1090px;
}
.img2{
      width: 100%;
    height: 1090px ;
}
.bgImg div:nth-child(3) {
    height: 930px;
}
.img3{
      width: 100%;
    height: 930px ;
}



        header {
            max-width: 1200px;
            height: 120px;
            width: 100%;
            /* border-radius: 12px; */
            /* box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1); */
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 40px;
            position: relative;
            overflow: hidden;
            margin: 0 auto;  /* 关键：水平居中 */
            z-index: 1; /* 高于 bgImg 的 z-index */
        }
        
        .logo {
            font-size: 24px;
            font-weight: 600;
            color: #FFFFFF;
            display: flex;
            align-items: center;
        }
        
        .logo-icon {
            width: 64px;
            height: 64px;
            background-image: url("img/b1.png");
            margin-right: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
          
            background-size: cover; /* 确保图片覆盖整个div */
            background-position: center; /* 图片居中显示 */
        }
        
        .nav-links {
            display: flex;
            list-style: none;
        }
        
        .nav-links li {
            margin-left: 20px;
            position: relative;
        }
        
        .nav-links a {
            text-decoration: none;
            color: #FFFFFF;
            font-size: 20px;
            font-weight: 600;
            padding: 10px 15px;
            border-radius: 8px;
            transition: all 0.3s ease;
            display: block;
            position: relative;
        }
        
        .nav-links a:hover {
            background-color: rgba(255, 255, 255, 0.3);
            transform: translateY(-2px);
            color: #FFFFFF;
        }
        
        .nav-links a.active {
            color: #FFFFFF;
        }
        
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 3px;
            background: linear-gradient(90deg, #FFFFFF, #FFFFFF);
            border-radius: 2px;
        }
        
        .hamburger {
            display: none;
            cursor: pointer;
            background: none;
            border: none;
            outline: none;
        }
        
        .hamburger span {
            display: block;
            width: 30px;
            height: 3px;
            background-color: #333333;
            margin: 6px 0;
            border-radius: 3px;
            transition: all 0.3s ease;
        }
        
.content {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto; /* 与 header 同宽并居中 */
  display: flex;

  gap: 20px; /* 两列之间的间距 */
  padding: 20px 40px; /* 与 header 的 padding 保持一致 */
}

.d1 {
  flex: 2; /* 占 2/3 宽度 */
  display: flex;
  flex-direction: column;
  gap: 20px; /* 三个子 div 之间的间距 */
  align-items: center; 
}


.d2 {
  flex: 1; /* 占 1/3 宽度 */
  min-height: 640px; /* d1 三个 div 总高度 + gap */
}

.d1 div:nth-child(1) {
    height: 190px;
    width: 190px;
    margin-top: 42px;
    /* background: #f5f5f5; */
    background-image: url('img/b1.png');
    background-size: cover; /* 确保图片覆盖整个div */
    background-position: center; /* 图片居中显示 */
}
.d1t1 {
    font-size: 68px;
    font-weight: 300;
    color: #FFFFFF;
}
.d1t2 {
    font-size: 30px;
    font-weight: 300;
    color: #FFFFFF;
}
.d1 img {
    height: 60px;
    width: 210px ;
    margin-top: 42px;
}

.d2 img{
  width: 378px;
}

.d3 {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto; /* 与 header 同宽并居中 */
    margin-top: 200px;

    display: flex;
    align-items: center; 
    justify-content: center;
}
.d3 img {
    height: 80px;
    width: 724px ;
    margin-top: 42px;
    object-fit: contain; /* 完整显示图片 */
}

.d4 {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
    margin-top: 64px;
  display: flex;
  flex-wrap: wrap; /* 允许换行 */
  gap: 60px; /* 图片间距 */
  justify-content: center; /* 水平居中（可选） */
}

.d4 img {
  width: 554px;
  height: 424px;
  object-fit: cover; /* 保持图片比例（可选） */
}

.d5 {
  width: 100%;
  height: 1080px;
  margin-top: 84px;
  display: flex;
  justify-content: center; /* 水平居中（可选） */
    align-items: center; 
    background-color:#F9F1F4 ;
}

.d5 img {
  width: 1167px;
  height: 957px;
}

.d6 {
  width: 100%;
  height: 1080px;
  margin-top: 84px;
  display: flex;
  justify-content: center; /* 水平居中（可选） */
    align-items: center; 
    background-color:#FFFFFF ;
}

.d6 img {
  width: 1167px;
  height: 957px;
}

.d7 {
  width: 100%;
  margin: 0 auto;
  position: relative;
}

.d7 > div {
  width: 100%;
}

.d7 > div:first-child {
    height: 1080px;
    background-color: #F9F1F4;
    position: relative; /* 为子元素提供定位基准 */
    padding-top: 1px; /* 阻止合并 */
}

.d7img1{
    width: 931px;
    height: 76px;
    margin: 120px auto 0; 
    display: block; 
}

.d7img2{
    width: 1203px;
    height: 42px;
    margin: 100px auto 0; 
    display: block; 
}

.d7 > div:nth-child(2) {
    height: 1900px;
    position: relative; /* 为子元素提供定位基准 */
    padding-top: 1px; /* 阻止合并 */
}


/* b16.png 覆盖层 */
.d7 > img:last-child {
  position: absolute;
  top: 35%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 1200px;
  height: 1148px;
  z-index: 10;
  pointer-events: none; /* 允许点击穿透 */
}

.d7img3{
    width: 100%;
    height: 742px;
    position: absolute;
    bottom: 5%;
    left: 0%;
    pointer-events: none; /* 允许点击穿透 */
}

.d7img4{
    width: 100%;
    height: 515px;
    position: absolute;
    bottom: 0%;
    left: 0%;
    pointer-events: none; /* 允许点击穿透 */
}

.d8{
    width: 1200px;
    height: 600PX;
    align-items: center;
    margin: 0 auto 30px; /* 上下边距 0，左右自动（居中），下边距 30px */
    margin-top: 650px; 
    justify-content: center; /* 水平居中排列 */ 
    z-index: 11;
}

.d5p1{
     width: 1200px;
     text-align: center;
    align-items: center;
    color: rgba(0, 0, 0, 1);
    font-size: 48px;
    margin: 0 auto 0px; /* 上下边距 0，左右自动（居中），下边距 30px */
    margin-top: 30px;   
}

.d5p2{
    width: 432px;
    align-items:start;
    color: rgba(0, 0, 0, 1);
    font-size: 32;
    margin-top: 30px;   
}
 .text-input1 {
    margin-top: 10px;
    width: 1200px;
    height: 300px;
    border: 2px solid #000;
     border-radius: 8px;
    padding: 10px;
    font-size: 16px;
    box-sizing: border-box; /* Ensures padding doesn't add to total width/height */
    z-index: 11;
}
.text-input2 {
    margin-top: 10px;
    width: 1200px;
    height: 80px;
    border: 2px solid #000;
    border-radius: 8px;
    padding: 10px;
    font-size: 16px;
    z-index: 12;
    box-sizing: border-box; /* Ensures padding doesn't add to total width/height */
}

.submit-btn {
            width: 240px;
            height: 64px;
            background: #F35756;
            color: white;
            border: none;
            border-radius: 37px;
            font-size: 26px;
            font-weight: bold;
            cursor: pointer;
            transition: background 0.3s;
            position: absolute;
            left: 50%;
     transform: translateX(-50%); /* 向左平移自身宽度的一半 */
    z-index: 11;
}
        
        .submit-btn:hover {
            background: #e04a49;
        }
        
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0,0,0,0.5);
            z-index: 1000;
            justify-content: center;
            align-items: center;
        }
        
        .modal-content {
            background-color: white;
            padding: 30px;
            border-radius: 10px;
            text-align: center;
            font-size: 20px;
            box-shadow: 0 4px 8px rgba(0,0,0,0.2);
        }
.d9 {
    width: 1020px;
    height: 40px;
    position: absolute;
    bottom: 5%;
    left: 50%;
    transform: translate(-50%, -50%);

      display: flex;
  /* 让内部元素均分宽度 */
  justify-content: space-around;
  /* 垂直居中对齐文字 */
  align-items: center;
}

.d9 span{
    color:#FFFFFF;
    font-size: 16px ;
    font-weight: 300;
 /* 每个span占据相同宽度 */
  flex: 1;
  /* 文本居中 */
  text-align: center;
}