/* classroom 第二十五屏：纯色底 + 点装饰 + 教室 WebM + 文案置顶，仅 [data-slide-id="classroom"] */

.deck-slide[data-slide-id="classroom"] .deck-head {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.deck-slide[data-slide-id="classroom"].deck-slide--theme-class-yellow {
  background: #fcd431;
  background-image: none;
}

.deck-slide[data-slide-id="classroom"] .deck-slide__layer .deck-body {
  pointer-events: none !important;
}

.deck-slide[data-slide-id="classroom"] .deck-slide__media {
  pointer-events: none;
}

.deck-media-layout--classroom-stack {
  position: absolute;
  left: 0;
  top: 0;
  width: 1920px;
  height: calc(var(--deck-h, 1611px) + var(--deck-overlap-ext, 160px));
  right: auto;
  bottom: auto;
  pointer-events: none;
  overflow: visible;
  z-index: 0;
}

.deck-slide[data-slide-id="classroom"] .cr__dot-deco {
  position: absolute;
  left: 0;
  top: 182px;
  width: 1920px;
  height: 1350px;
  max-width: none;
  max-height: none;
  display: block;
  object-fit: scale-down;
  object-position: left top;
  pointer-events: none;
  z-index: 0;
}

/* 1656×1242 在 1920×1611 底图内水平垂直居中；矩形 S 与视频均相对此 stage 居中 */
.deck-slide[data-slide-id="classroom"] .cr__classroom-stage {
  position: absolute;
  left: calc((1920px - 1656px) / 2);
  top: calc((var(--deck-h, 1611px) - 1242px) / 2 - 57px);
  width: 1656px;
  height: 1242px;
  margin: 0;
  padding: 0;
  pointer-events: none;
  z-index: 1;
}

/* 矩形 S：1652×1004，在 stage 内居中（等同底图居中）；圆角与阴影仅作用于矩形 */
.deck-slide[data-slide-id="classroom"] .cr__rect-s {
  position: absolute;
  left: calc((1656px - 1652px) / 2);
  top: calc((1242px - 1004px) / 2);
  width: 1652px;
  height: 1004px;
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  border-radius: 80px;
  background: #fcd431;
  pointer-events: none;
  z-index: 0;
  filter: drop-shadow(15px 30px 26px rgba(213, 138, 0, 0.7));
}

/* 矩形 S 可视裁切区，与矩形 S 同位置同尺寸 */
.deck-slide[data-slide-id="classroom"] .cr__classroom-clip {
  position: absolute;
  left: calc((1656px - 1652px) / 2);
  top: calc((1242px - 1004px) / 2);
  width: 1652px;
  height: 1004px;
  margin: 0;
  padding: 0;
  border-radius: 80px;
  overflow: hidden;
  pointer-events: none;
  z-index: 1;
}

.deck-slide[data-slide-id="classroom"] .cr__classroom-vid {
  position: absolute;
  left: calc((1652px - 1656px) / 2);
  top: calc((1004px - 1242px) / 2);
  width: 1656px;
  height: 1242px;
  max-width: none;
  max-height: none;
  display: block;
  object-fit: cover;
  object-position: center center;
  pointer-events: none;
  border-radius: 0;
  filter: none;
}

.deck-slide[data-slide-id="classroom"] .deck-media-layout--classroom-stack img.lazy-media {
  max-width: none;
  max-height: none;
  object-position: left top;
}

.deck-slide[data-slide-id="classroom"] .deck-media-layout--classroom-stack video.deck-managed-video {
  max-width: none;
  max-height: none;
}

.deck-slide[data-slide-id="classroom"] .deck-slide__layer {
  z-index: 2;
}

.cr-copy {
  position: relative;
  width: 100%;
  min-height: var(--deck-h, 1611px);
  height: 100%;
  margin: 0;
  padding: 0;
  pointer-events: none;
  z-index: 1;
}

.deck-slide__layer .cr-copy {
  pointer-events: none;
}

.deck-slide[data-slide-id="classroom"] .cr__title {
  position: absolute;
  left: 174px;
  top: 111px;
  width: 400px;
  height: 40px;
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: var(--font-title);
  font-size: 30px;
  font-weight: 400;
  line-height: 40px;
  letter-spacing: 0;
  color: #493723;
  text-align: left;
  white-space: nowrap;
  overflow: hidden;
  pointer-events: none;
  z-index: 2;
}

.deck-slide[data-slide-id="classroom"] .cr__body {
  position: absolute;
  left: 174px;
  top: 160px;
  width: 290px;
  height: 31px;
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 31px;
  letter-spacing: 2px;
  color: #493723;
  text-align: left;
  white-space: nowrap;
  overflow: hidden;
  pointer-events: none;
  z-index: 2;
}