.u-section-1 {
    min-height: 400px;
  }
  
  
  .u-section-1 .u-image-1 {
    min-height: calc(831px * 0.6);
    height: 100vh; /* 强制背景占满窗口高度 */
    position: relative; /* 为伪元素定位提供参考 */
    overflow: hidden; /* 隐藏伪元素溢出的部分 */
    /* 移除以下属性 */
    /* background-size: cover; */
    /* background-position: center; */
    /* background-repeat: no-repeat; */
    /* background-image: url("../images/photo-1488590528505-98d2b5aba04b.jpeg"); */
  }
  
  /* 定义背景渐变放大缩小的关键帧动画 */
  @keyframes backgroundScale {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
  }
  
  .u-section-1 .u-image-1::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("../images/photo-1488590528505-98d2b5aba04b.jpeg"); /* 背景图片路径 */
    background-size: cover; /* 背景覆盖整个容器 */
    background-position: center; /* 背景图片居中 */
    background-repeat: no-repeat; /* 禁止重复 */
    transform: scale(1); /* 初始缩放 */
    transform-origin: center; /* 缩放中心 */
    animation: backgroundScale 10s ease-in-out infinite; /* 应用动画 */
    z-index: -1; /* 将伪元素置于内容后面 */
  }
  
  .u-section-1 .u-container-layout-1 {
    padding: 0;
    transform: scale(0.6); /* 缩放到原来的 50% */
    transform-origin: top center; /* 以中心为缩放中心 */
  }
  
  .u-section-1 .u-form-1 {
    height: 831px;
    background-image: none;
    box-shadow: 5px 5px 20px 0 rgba(0,0,0,0.4);
    --radius: 36px;
    width: 742px;
    margin: 245px auto 0;
  }
  
  .u-section-1 .u-text-1 {
    margin-left: 0;
    line-height: 0.72;
    text-transform: uppercase;
    font-size: 2.25rem;
  }
  
  .u-section-1 .u-input-1 {
    --radius: 50px;
    font-weight: 600;
  }
  
  .u-section-1 .u-form-group-3 {
    margin-left: 0;
  }
  
  .u-section-1 .u-input-2 {
    font-weight: 600;
    --radius: 50px;
  }
  
  .u-section-1 .u-text-2 {
    margin-left: 0;
    text-transform: uppercase;
    font-size: 2.25rem;
    line-height: 0.14;
  }
  
  .u-section-1 .u-btn-1 {
    border-style: solid;
    letter-spacing: 0px;
    background-image: none;
    width: 100%;
    font-size: 1.5rem;
    padding-left: 0;
    padding-right: 0;
    font-weight: 600;
    text-transform: none;
  }
  
  .u-section-1 .u-text-3 {
    margin-left: 0;
  }
  
  .u-section-1 .u-image-2 {
    width: 300px;
    height: 300px;
    box-shadow: 2px 0 0 0 rgba(0,0,0,0);
    transition-duration: 0.5s;
    transform: rotate(0deg) scale(1) translateX(0px) translateY(0px);
    margin: -1065px auto 0;
  }
  
  .u-section-1 .u-group-2 {
    width: 659px;
    min-height: 76px;
    height: auto;
    margin: 662px auto 27px;
  }
  
  .u-section-1 .u-container-layout-2 {
    padding-left: 30px;
    padding-right: 30px;
  }
  
  .u-section-1 .u-btn-2 {
    transition-duration: 0.5s;
    transform: rotate(0deg) scale(1) translateX(0px) translateY(0px);
    text-decoration: underline !important;
    margin: 24px auto 0 66px;
    padding: 0;
  }
  
  .u-section-1 .u-btn-3 {
    transition-duration: 0.5s;
    transform: rotate(0deg) scale(1) translateX(0px) translateY(0px);
    text-decoration: underline !important;
    margin: -26px 74px 1px auto;
    padding: 0;
  }
  
  @media (max-width: 1199px) {
    .u-section-1 .u-image-1 {
      --radius: 30px;
      margin-right: initial;
      margin-left: initial;
      height: auto;
    }
  
    .u-section-1 .u-image-2 {
      --animation-custom_in-translate_x: 0px;
      --animation-custom_in-translate_y: 0px;
      --animation-custom_in-opacity: 0;
      --animation-custom_in-rotate: 0deg;
      --animation-custom_in-scale: 1;
    }
  
    .u-section-1 .u-group-2 {
      height: auto;
    }
  
    .u-section-1 .u-btn-2 {
      border-style: solid;
    }
  
    .u-section-1 .u-btn-3 {
      border-style: solid;
    }
  }
  
  @media (max-width: 991px) {
    .u-section-1 .u-form-1 {
      width: 720px;
    }
  }
  
  @media (max-width: 767px) {
    .u-section-1 .u-form-1 {
      width: 540px;
    }
  
    .u-section-1 .u-group-2 {
      width: 540px;
    }
  
    .u-section-1 .u-container-layout-2 {
      padding-left: 10px;
      padding-right: 10px;
    }
  
    .u-section-1 .u-btn-2 {
      margin-left: 0;
    }
  
    .u-section-1 .u-btn-3 {
      margin-right: 0;
    }
  }
  
  @media (max-width: 575px) {
    .u-section-1 .u-form-1 {
      width: 340px;
    }
  
    .u-section-1 .u-group-2 {
      width: 340px;
    }
  }
  
  .u-section-1 .u-image-2,
  .u-section-1 .u-image-2:before,
  .u-section-1 .u-image-2 > .u-container-layout:before {
    transition-property: fill, color, background-color, stroke-width, border-style, border-width, border-top-width, border-left-width, border-right-width, border-bottom-width, custom-border, borders, box-shadow, text-shadow, opacity, border-radius, stroke, border-color, font-size, font-style, font-weight, text-decoration, letter-spacing, transform, background-image, image-zoom, background-size, background-position;
  }
  
  .u-section-1 .u-image-2.u-image-2.u-image-2:hover {
    transform: scale(1.1) translateX(0px) translateY(0px) !important;
  }
  
  .u-section-1 .u-image-2.u-image-2.u-image-2.hover {
    transform: scale(1.1) translateX(0px) translateY(0px) !important;
  }
  
  .u-section-1 .u-btn-2,
  .u-section-1 .u-btn-2:before,
  .u-section-1 .u-btn-2 > .u-container-layout:before {
    transition-property: fill, color, background-color, stroke-width, border-style, border-width, border-top-width, border-left-width, border-right-width, border-bottom-width, custom-border, borders, box-shadow, text-shadow, opacity, border-radius, stroke, border-color, font-size, font-style, font-weight, text-decoration, letter-spacing, transform, background-image, image-zoom, background-size, background-position;
  }
  
  .u-section-1 .u-btn-2.u-btn-2.u-btn-2:hover {
    transform: scale(1.1) translateX(0px) translateY(0px) !important;
  }
  
  .u-section-1 .u-btn-2 {
    border-color: transparent !important;
  }
  
  .u-section-1 .u-btn-2.u-btn-2.u-btn-2.hover {
    transform: scale(1.1) translateX(0px) translateY(0px) !important;
  }
  
  .u-section-1 .u-btn-2 {
    border-color: transparent !important;
  }
  
  .u-section-1 .u-btn-3,
  .u-section-1 .u-btn-3:before,
  .u-section-1 .u-btn-3 > .u-container-layout:before {
    transition-property: fill, color, background-color, stroke-width, border-style, border-width, border-top-width, border-left-width, border-right-width, border-bottom-width, custom-border, borders, box-shadow, text-shadow, opacity, border-radius, stroke, border-color, font-size, font-style, font-weight, text-decoration, letter-spacing, transform, background-image, image-zoom, background-size, background-position;
  }
  
  .u-section-1 .u-btn-3.u-btn-3.u-btn-3:hover {
    transform: scale(1.1) translateX(0px) translateY(0px) !important;
  }
  
  .u-section-1 .u-btn-3 {
    border-color: transparent !important;
  }
  
  .u-section-1 .u-btn-3.u-btn-3.u-btn-3.hover {
    transform: scale(1.1) translateX(0px) translateY(0px) !important;
  }
  
  .u-section-1 .u-btn-3 {
    border-color: transparent !important;
  }
  
  .u-input-rectangle {
    display: flex; /* 使用 Flexbox */
    align-items: center; /* 垂直居中 */
    justify-content: center; /* 水平居中 */
    text-align: center; /* 文本水平居中 */
  }
  
  .u-form-send-error {
    cursor: pointer;
}

/* 模态窗口的背景 */
.modal {
  display: block; /* 始终保持为block，以便应用过渡效果 */
  position: fixed; /* 固定位置 */
  z-index: 1000; /* 确保模态窗口在最前面 */
  left: 0;
  top: 0;
  width: 100%; /* 全屏 */
  height: 100%; /* 全屏 */
  overflow: auto; /* 如果需要滚动 */
  background-color: rgba(0, 0, 0, 0.5); /* 半透明背景 */

  /* 初始状态为隐藏 */
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease; /* 过渡效果 */
}

/* 当模态窗口显示时应用 */
.modal.show {
  opacity: 1;
  visibility: visible;
}

/* 模态窗口的内容 */
.modal-content {
  background-color: #fefefe;
  margin: 15% auto; /* 居中 */
  padding: 20px;
  border: 1px solid #888;
  width: 80%; /* 宽度 */
  max-width: 500px; /* 最大宽度 */
  border-radius: 10px; /* 圆角 */
  text-align: center;

  /* 添加淡入效果 */
  transform: translateY(-20px);
  transition: transform 0.3s ease;
}

.modal.show .modal-content {
  transform: translateY(0);
}

/* 关闭按钮 */
.close-button {
  color: #aaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
}

.close-button:hover,
.close-button:focus {
  color: black;
  text-decoration: none;
}

/* Toast 容器 */
#toast-container {
  position: fixed;
  top: 10%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 100002; /* 确保在最上层 */
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  pointer-events: none; /* 允许点击穿透 */
}

/* 单个 Toast */
.toast {
  min-width: 250px;
  max-width: 350px;
  padding: 15px 20px;
  border-radius: 5px;
  color: #fff;
  font-family: Arial, sans-serif;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
  opacity: 0.9;
  transition: opacity 0.5s ease, transform 0.5s ease;
  display: flex;
  align-items: center;
  justify-content: center; /* 居中文本 */
  text-align: center; /* 居中文本 */
  pointer-events: auto; /* 允许 Toast 接收事件 */
}

/* 成功 Toast */
.toast.success {
  background-color: #4CAF50; /* 绿色 */
}

/* 错误 Toast */
.toast.error {
  background-color: #f44336; /* 红色 */
}

/* 信息 Toast */
.toast.info {
  background-color: #2196F3; /* 蓝色 */
}

/* 淡出效果 */
.toast.fade-out {
  opacity: 0;
  transform: translateY(-20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}