.banner-video {
  position: relative;
  width: 100%;
  aspect-ratio: 1280 / 544; /* 按你视频实际比例调整 */
  background: #000;
  overflow: hidden;
}

.banner-video video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* 声音按钮 */
.unmute-btn {
  position: absolute;
  right: 16px;
  bottom: 16px;
  z-index: 10;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.5);
  color: #fff;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease;
  -webkit-tap-highlight-color: transparent;
}

.unmute-btn:hover {
  background: rgba(0, 0, 0, 0.75);
}

/* 默认显示静音图标，隐藏有声图标 */
.unmute-btn .icon-unmuted {
  display: none;
}

/* 开启声音后，切换图标 */
.unmute-btn.is-unmuted .icon-muted {
  display: none;
}

.unmute-btn.is-unmuted .icon-unmuted {
  display: inline;
}