/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

/* 通用框样式 */
.box {
    width: 100%;
    margin: 0;
    padding: 0;
    display: block;
}
/* 框1样式：背景为图片，高度820px */
.box1 {
    height: 820px;
    background-image: url('img/part_1_bg.png');
    background-size: 100% 100%;
    background-position: center;
    margin: 0;
    position: relative;
    overflow: hidden;
}

/* 框1.1样式：高度76px，位于框1内部顶部 */
.box1-1 {
    height: 76px;
    /* 移除背景色，让box1的背景图片透过显示 */
    width: 100%;
    max-width: 1440px;
    padding: 0 20px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

/* logo图片样式 */
.logo {
    height: 50px;
    width: auto;
    object-fit: contain;
}

/* 框1.2样式：宽度944px，距box1上边框76px、下边框16px，内容纵轴居中 */
.box1-2 {
    height: calc(100% - 92px);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    width: auto;

    position: absolute;
    top: 76px;
    bottom: 16px;
    left: 0;
    right: 0;
}

.box1-2 img {
      height: 100%;
      width: auto;
      object-fit: cover;
      display: block;
  }

/* 框2样式：背景色#FFFAFE，高度400px */
.box2 {
    height: 400px;
    background-color: #FFFAFE;
    padding: 0;
    margin: 0;
    position: relative;
}

/* 框2.1样式：高度288px，宽度1440px，距离框2上边40px，下边32px，垂直居中 */
.box2-1 {
    height: 288px;
    margin: 40px auto 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: auto;
}

.box2-1 img {
      height: 100%;
      width: auto;
      object-fit: cover;
      display: block;
  }

/* 框3样式：背景色#FFFFFF，高度262px */
.box3 {
    height: 262px;
    background-color: #FFFFFF;
    padding: 0;
    margin: 0;
    position: relative;
}

/* 框3.1样式：高度182px，宽度544px，距离框3上边40px，下边40px，垂直居中 */
.box3-1 {
    height: 182px;
    margin: 40px auto 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: auto;
}

.box3-1 img {
      height: 100%;
      width: auto;
      object-fit: cover;
      display: block;
  }

/* 框4样式：背景色#FFFFFF，高度72px，宽度撑满屏幕 */
.box4 {
    height: 72px;
    background-color: #FFFFFF;
    width: 100%;
    padding: 0;
    margin: 0;
}

/* 框4-1样式：宽度1440px，居中显示 */
.box4-1 {
    width: 1440px;
    height: 100%;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* 框4-1-1样式：左对齐，左侧内边距32px，上下内边距24px，文字纵轴居中 */
.box4-1-1 {
    padding: 24px 0 24px 32px;
    color: #1E2E4F;
    font-size: 14px;
    font-family: 'PingFang SC', sans-serif;
    font-weight: 500;
    display: flex;
    align-items: center;
}

/* 隐私政策链接样式 */
.privacy-policy a {
    color: #1E2E4F;
    text-decoration: none;
    font-size: 14px;
    font-family: 'PingFang SC', sans-serif;
    font-weight: 500;
}

.privacy-policy a:hover {
    text-decoration: underline;
}

/* 联系信息容器样式 */
.contact-info {
    display: flex;
    align-items: center;
    margin-left: 48px;
}

/* 联系我们样式 */
.contact-us {
    color: #1E2E4F;
    font-size: 14px;
    font-family: 'PingFang SC', sans-serif;
    font-weight: 500;
}

/* 联系邮箱样式 */
.contact-email {
    color: #607091;
    font-size: 14px;
    font-family: 'PingFang SC', sans-serif;
    font-weight: 400;
    margin-left: 4px;
}

/* 框4-1-2样式：右对齐，右侧内边距32px，上下内边距24px，文字纵轴居中 */
.box4-1-2 {
    padding: 24px 32px 24px 0;
    color: #607091;
    font-size: 14px;
    font-family: 'PingFang SC', sans-serif;
    font-weight: 400;
}

/* 响应式设计 */
@media (max-width: 1440px) {
    .box2-1 {
        width: 100%;
        max-width: 1200px;
    }
}

@media (max-width: 1024px) {
    .box1-2 {
        width: 100%;
        max-width: 800px;
    }
    
    .box2-1 {
        width: 100%;
        max-width: 900px;
    }
    
    .box3-1 {
        width: 100%;
        max-width: 400px;
    }
}

@media (max-width: 768px) {
    .box1 {
        height: auto;
        min-height: 600px;
    }
    
    .box1-2 {
        height: auto;
        min-height: 500px;
    }
    
    .box2 {
        height: auto;
        min-height: 300px;
    }
    
    .box2-1 {
        height: auto;
        min-height: 200px;
    }
    
    .box3 {
        height: auto;
        min-height: 200px;
    }
    
    .box3-1 {
        height: auto;
        min-height: 120px;
    }
}