/* 本次新增/修改：图片4:3比例、时间标签、图片缩放动画 */
.ai-card-grid-wrap {
  position: relative;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;}

.ai-card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  transition: opacity 0.3s ease;}

.ai-card-item {
  background: var(--color-bg-card, #ffffff);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0, 63, 136, 0.08);
  cursor: pointer;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid var(--color-border, #E2E8F0);}

.ai-card-item:hover {
  box-shadow: 0 8px 28px rgba(0, 63, 136, 0.14);
  transform: translateY(-3px);
  border-color: var(--color-primary-light, #E8F0FB);}

.ai-card-link {
  display: block;
  text-decoration: none;
  color: inherit;}

.ai-card-img-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 5 / 3;          /* 本次新增：4:3比例 */
  overflow: hidden;
  background: var(--gray-100, #f3f4f6);}

.ai-card-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;            /* 本次新增：图片铺满容器 */
  transition: transform 0.5s ease;}

.ai-card-item:hover .ai-card-img {
  transform: scale(1.05);}

.ai-card-date {                 /* 本次新增：时间标签 */
  position: absolute;
  bottom: 12px;
  left: 14px;
  font-size: 13px;
  color: #ffffff;
  background: rgba(0, 63, 136, 0.8);
  padding: 4px 12px;
  border-radius: 4px;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  letter-spacing: 0.5px;
  backdrop-filter: blur(4px);}

.ai-card-body {
  padding: 16px 20px 20px;}

.ai-card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-primary, #1A1A1A);
  line-height: 1.5;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;}

/* 分页控制（保持不变） */
.ai-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 36px;}

.ai-page-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--color-border, #E2E8F0);
  border-radius: 8px;
  background: var(--color-bg-card, #ffffff);
  color: var(--color-text-secondary, #4A5568);
  cursor: pointer;
  transition: all 0.25s ease;}

.ai-page-btn:hover:not(:disabled) {
  border-color: var(--color-primary, #003F88);
  color: var(--color-primary, #003F88);
  box-shadow: 0 2px 8px rgba(0, 63, 136, 0.1);}

.ai-page-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;}

.ai-page-dots {
  display: flex;
  align-items: center;
  gap: 10px;}

.ai-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border, #E2E8F0);
  cursor: pointer;
  transition: all 0.3s ease;}

.ai-dot.active {
  background: var(--color-primary, #003F88);
  width: 28px;
  border-radius: 4px;}

.ai-dot:hover {
  background: var(--color-primary-light, #E8F0FB);}

@media (max-width: 768px) {
  .ai-card-grid {
    grid-template-columns: 1fr;
    gap: 16px;}
  .ai-card-img-wrap {
    aspect-ratio: 4 / 3;}
}