.about-hero-section {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.about-hero-section .hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  z-index: 0;
}
.about-hero-section .hero-bg .img-hero {
  width: 100%;
  height: 100%;
  object-fit: cover;
  -webkit-mask-image: radial-gradient(125% 10% at 50% 102%, transparent 50%, #fff 51%);
  mask-image: radial-gradient(125% 10% at 50% 102%, transparent 50%, #fff 51%);
}
.about-hero-section .hero-bg .hero-content {
  width: 1280px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  margin: 0 auto;
  z-index: 10;
}
.about-hero-section .hero-bg .hero-content img {
  margin-bottom: 43px;
}
.about-hero-section .hero-bg .hero-content span {
  font-size: 46px;
  font-weight: 700;
  color: #ffffff;
  position: relative;
}
.about-hero-section .hero-bg .hero-content span::after {
  content: '';
  display: block;
  width: 18px;
  height: 18px;
  background-color: #00A3E0;
  border-radius: 50%;
  position: absolute;
  bottom: 15px;
  right: -39px;
}
.about-hero-section .hero-bg .hero-content .title-butn {
  padding-top: 35px;
  display: flex;
  align-items: center;
}
.about-hero-section .hero-bg .hero-content .title-butn .title {
  width: 380px;
  font-size: 14px;
  font-weight: 400;
  color: #ffffff;
  line-height: 22px;
}
.badnimg {
  width: 100%;
  position: relative;
}
.badnimg .image__file {
  min-height: 100vh;
  width: 100%;
  object-fit: cover;
  object-position: top;
}
.badnimg .mouse-scroll {
  margin-top: 12px;
  box-sizing: border-box;
  width: 25px;
  height: 35px;
  border: 2px solid var(--mouse-color);
  border-radius: 10px;
  display: inline-block;
  position: absolute;
  bottom: 10%;
  inset-inline-end: 7%;
  z-index: 8;
}
.badnimg .mouse-scroll__wheel {
  position: absolute;
  left: 9px;
  top: 5px;
  background-color: var(--mouse-color);
  width: 3px;
  height: 10px;
  border-radius: 5px;
  opacity: 0;
  animation: mouse-wheel 2s ease-in-out infinite;
}
.badnimg .mouse-scroll--white {
  border: 1px solid #fff;
}
.badnimg .mouse-scroll__wheel--white {
  background-color: #fff;
}
@keyframes mouse-wheel {
  0% {
    transform: translateY(0);
    opacity: 0;
  }
  10% {
    transform: translateY(0);
    opacity: 1;
  }
  70% {
    transform: translateY(12px);
    opacity: 1;
  }
  90% {
    transform: translateY(12px);
    opacity: 0;
  }
}
.container {
  width: 100%;
  margin: 0 auto;
  max-width: 1280px;
  padding-top: 60px;
}
/* 头部标题 */
.title {
  font-size: 36px;
  font-weight: bold;
  margin-bottom: 20px;
}
.sub-title {
  font-size: 16px;
  color: #333;
  margin-bottom: 70px;
}
/* 表单行布局 */
.form-item {
  display: flex;
  margin-bottom: 50px;
  align-items: flex-start;
}
.label {
  margin-right: 47px;
  font-size: 16px;
  color: #333;
  padding-top: 10px;
  /* 对齐输入框文字 */
  flex-shrink: 0;
}
.input-area {
  flex-grow: 1;
}
/* 反馈类型卡片选择 */
.card-group {
  display: flex;
  gap: 20px;
}
.card {
  width: 350px;
  padding-bottom: 20px;
  padding-left: 23px;
  padding-top: 20px;
  border: 1px solid #dcdfe6;
  border-radius: 5px;
  cursor: pointer;
  position: relative;
  transition: all 0.3s;
  overflow: hidden;
}
.card:hover {
  border-color: #c0c4cc;
}
.card h4 {
  font-size: 18px;
  font-weight: 400;
  color: #050505;
  padding-bottom: 10px;
}
.card p {
  font-size: 14px;
  font-weight: 400;
  color: #333333;
  line-height: 22px;
}
/* 选中状态 */
.card.active {
  border-color: #002EA6;
  background: rgba(0, 46, 166, 0.08);
}
.card.active h4 {
  color: #002EA6;
}
.card.active p {
  color: #002EA6;
}
/* 右上角三角勾 */
.card.active::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  border-top: 35px solid #002EA6;
  border-left: 35px solid transparent;
}
.card.active::before {
  content: '';
  position: absolute;
  top: 5px;
  right: 5px;
  width: 10px;
  height: 9px;
  background: url(../image/dui.png) no-repeat;
  background-size: 100% 100%;
  z-index: 1;
}
.input-area input[type="text"] {
  width: 413px;
  height: 60px;
  background: #f6f7fa;
  border-radius: 5px;
  outline: none;
  border: none;
  padding-left: 30px;
  font-size: 16px;
  color: #333;
}
textarea {
  padding-top: 24px;
  padding-left: 30px;
  width: 1170px;
  height: 280px;
  background: #f6f7fa;
  border-radius: 5px;
  resize: none;
  outline: none;
  font-size: 16px;
  border: 1px solid transparent;
  font-family: '微软雅黑';
}
textarea::placeholder,
input::placeholder {
  color: #999;
  font-family: '微软雅黑';
  font-size: 14px;
}
/* 上传区域样式 */
.upload-desc {
  font-size: 14px;
  color: #666;
  margin-bottom: 20px;
}
.sub-text {
  display: block;
  font-size: 14px;
  color: #999;
  margin-top: 4px;
  text-align: center;
}
.upload-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
}
.upload-btn {
  width: 100px;
  height: 32px;
  background-color: #f2f3f5;
  border: none;
  border-radius: 2px;
  font-size: 12px;
  color: #666;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 15px;
}
.upload-btn:hover {
  background-color: #e5e6eb;
}
/* 预览图容器 */
.preview-item {
  width: 112px;
  height: 112px;
  border-radius: 4px;
  overflow: hidden;
  position: relative;
  background-color: #f5f6f8;
}
.preview-item img,
.preview-item video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
/* 删除遮罩层 */
.preview-item .mask {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.2s;
  cursor: pointer;
}
.preview-item:hover .mask {
  opacity: 1;
}
.delete-icon {
  color: #fff;
  font-size: 20px;
}
/* 隐藏原生文件输入框 */
input[type="file"] {
  display: none;
}
/* 底部按钮 */
.submit-btn {
  width: 250px;
  height: 60px;
  background-color: #002EA6;
  color: white;
  border: none;
  border-radius: 4px;
  font-size: 14px;
  cursor: pointer;
  margin-top: 20px;
}
.submit-btn:hover {
  background-color: #002EA6;
}
.right-nav.active {
  right: 30px;
}
.right-nav {
  position: fixed;
  top: 50%;
  right: -60px;
  transform: translateY(-50%);
  transition: right 0.9s ease;
}
.right-nav a {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.right-nav a .nav-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 49px;
  height: 49px;
  border-radius: 50%;
  background-color: #002ea6;
  margin-bottom: 10px;
}
.right-nav a .nav-icon img {
  width: 21px;
  height: 20px;
}
.right-nav a span {
  font-size: 12px;
  color: #848484;
}
/* --- 1. 基础布局 --- */
.preview-item {
  position: relative;
  overflow: hidden;
}
/* 遮罩层：默认透明，悬停变暗 */
.preview-item .mask {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  transition: all 0.3s;
  cursor: pointer;
}
.preview-item:hover .mask {
  background: rgba(0, 0, 0, 0.5);
}
/* --- 2. 删除图标容器 (通用样式) --- */
.preview-item .delete-icon {
  position: absolute;
  z-index: 30;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}
.preview-item .delete-icon img {
  width: 60%;
  height: 60%;
  object-fit: contain;
  pointer-events: none;
}
.preview-item:not(.is-video) .delete-icon {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 15px;
  height: 17px;
}
.preview-item:not(.is-video) .delete-icon img {
  width: 100%;
  height: 100%;
}
.preview-item.is-video .delete-icon {
  top: 0;
  right: 0;
  left: auto;
  transform: none;
  width: 30px;
  height: 30px;
  background: rgba(0, 0, 0, 0.5);
  border-bottom-left-radius: 8px;
}
.preview-item.is-video .delete-icon img {
  width: 50%;
  height: 50%;
  filter: brightness(0) invert(1);
}
.preview-item.is-video .mask::after {
  content: '▶';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 40px;
  color: rgba(255, 255, 255, 0.9);
  pointer-events: none;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
  z-index: 10;
}
.video-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  z-index: 9999;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
}
.video-modal.show {
  opacity: 1;
  visibility: visible;
}
.video-modal video {
  max-width: 90%;
  max-height: 90%;
  outline: none;
}
.video-modal .close-btn {
  position: absolute;
  top: 20px;
  right: 30px;
  color: #fff;
  font-size: 40px;
  cursor: pointer;
  z-index: 10000;
}
.delete-icon img {
  width: 15px;
  height: 17px;
}