body {
  margin: 0;
  padding: 0;
  background: #f4f4f4;
  font-family: sans-serif;
    font-display: swap; /* 提升首屏加载体验 */
}

.grid {
  margin: 0px 0px 0px 16px;   /* 两边留点间距，避免贴边太死板，可以改成 0 */
}

.grid-sizer,
.grid-item {
  width: calc(20% - 16px); /* 5列 */
}

@media (max-width: 1400px) {
  .grid-sizer,
  .grid-item {
    width: calc(25% - 16px); /* 4列 */
  }
}

@media (max-width: 1024px) {
  .grid-sizer,
  .grid-item {
    width: calc(33.33% - 16px); /* 3列 */
  }
}

@media (max-width: 1024px) {
  .grid-sizer,
  .grid-item {
    width: calc(50% - 16px); /* 平板和以下 → 2 列 */
  }
}

@media (max-width: 600px) {
  .grid-sizer,
  .grid-item {
    width: 100%; /* 手机竖屏 → 1 列 */
  }
}

.grid-item {
  margin-bottom: 16px;
}

.grid-item img,
.grid-item video {
  display: block;
  width: 100%;
  border-radius: 6px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);

}