/* =============================================
   入口页面 - PC端样式
   三图入口布局，符合人体工程学设计
   ============================================= */

/* 入口区域容器 */
.entrance-section {
  width: 88.54vw;
  margin: 2.08vw auto 1.56vw;
  padding: 2.08vw 0;
}

/* 页面标题 */
.entrance-title {
  text-align: center;
  font-size: 1.88vw;
  font-weight: 700;
  color: #333;
  margin-bottom: 2.6vw;
  letter-spacing: 0.1vw;
  position: relative;
}
.entrance-title::after {
  content: '';
  display: block;
  width: 3.13vw;
  height: 0.21vw;
  background: #0077d3;
  margin: 0.78vw auto 0;
  border-radius: 2px;
}

/* 三图入口网格布局 */
.entrance-grid {
  display: flex;
  justify-content: center;
  gap: 2.08vw;
}

/* 单个入口卡片 */
.entrance-card {
  flex: 1;
  max-width: 28vw;
  border-radius: 0.63vw;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 0.21vw 1.04vw rgba(0, 0, 0, 0.06);
  transition: transform 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              box-shadow 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  cursor: pointer;
  position: relative;
}
.entrance-card:hover {
  transform: translateY(-0.42vw);
  box-shadow: 0 0.52vw 2.08vw rgba(0, 119, 211, 0.15);
}

/* 图片容器 - 16:10 宽高比，适合视觉舒适度 */
.entrance-card-img-wrap {
  position: relative;
  width: 100%;
  padding-top: 62.5%; /* 16:10 比例 */
  overflow: hidden;
}
.entrance-card-img-wrap img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.entrance-card:hover .entrance-card-img-wrap img {
  transform: scale(1.05);
}

/* 遮罩层渐变 - 保证文字可读性 */
.entrance-card-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 50%;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 0.55) 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.25vw 1.56vw;
  z-index: 2;
}

/* 卡片信息区 */
.entrance-card-info {
  padding: 1.25vw 1.56vw 1.56vw;
}
.entrance-card-name {
  font-size: 1.15vw;
  font-weight: 600;
  color: #333;
  margin-bottom: 0.52vw;
  line-height: 1.5;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.entrance-card-desc {
  font-size: 0.83vw;
  color: #888;
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 进入按钮指示 */
.entrance-card-arrow {
  display: inline-flex;
  align-items: center;
  margin-top: 0.78vw;
  font-size: 0.83vw;
  color: #0077d3;
  font-weight: 500;
  transition: color 0.3s;
}
.entrance-card-arrow::after {
  content: '→';
  margin-left: 0.42vw;
  transition: transform 0.3s;
}
.entrance-card:hover .entrance-card-arrow::after {
  transform: translateX(0.31vw);
}
.entrance-card:hover .entrance-card-arrow {
  color: #005ba1;
}

/* 无障碍焦点样式 */
.entrance-card:focus-within {
  outline: 3px solid #0077d3;
  outline-offset: 2px;
}

/* 响应式微调 - 大屏 */
@media (min-width: 1920px) {
  .entrance-card-name {
    font-size: 20px;
  }
  .entrance-card-desc {
    font-size: 14px;
  }
  .entrance-title {
    font-size: 32px;
  }
}