/* twin-portrait 第九屏：纯白底 + 文案 + 双换装 WebM，仅 [data-slide-id="twin-portrait"] */

.deck-slide[data-slide-id="twin-portrait"] .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="twin-portrait"].deck-slide--theme-white-card {
  background: #ffffff;
}

.deck-media-layout--twin-portrait-stack {
  position: absolute;
  inset: 0;
  pointer-events: none;
  isolation: isolate;
}

/* 双 WebM 共用一个合成层，避免滚动时两路视频亚像素接缝闪白线 */
.tp__vid-pair {
  position: absolute;
  left: 194px;
  top: 259px;
  width: 1532px;
  height: 1014px;
  margin: 0;
  padding: 0;
  overflow: hidden;
  isolation: isolate;
  transform: translateZ(0);
  backface-visibility: hidden;
  contain: layout paint;
  pointer-events: none;
}

.tp__vid-pair .tp__vid {
  position: relative;
  display: block;
  float: left;
  margin: 0;
  padding: 0;
  max-width: none;
  max-height: none;
  object-fit: fill;
  object-position: left top;
  vertical-align: top;
  backface-visibility: hidden;
  pointer-events: none;
}

/* 换装 WebM：slides-data 覆写播停阈值 10% / 80%（§1.4 链路，续播不归零；远距脱水后重入从头播） */
/* 右列向左叠 1px，消除滚动重绘时两图层之间的 1px 白缝 */
.tp__vid-pair .tp__vid--b {
  margin-left: -1px;
}

.deck-slide[data-slide-id="twin-portrait"] video.tp__vid.deck-managed-video {
  border-radius: 0;
}

/* 滚动期间仅提升 pair 容器，不对单路 video 分别 translateZ（见 main.css 全局规则） */
.deck-scroll-layer .deck.deck--scrolling .deck-slide[data-slide-id="twin-portrait"].deck-slide--motion .tp__vid-pair {
  transform: translateZ(0.001px);
  will-change: transform;
}

.deck-scroll-layer .deck.deck--scrolling .deck-slide[data-slide-id="twin-portrait"].deck-slide--motion video.tp__vid.deck-managed-video {
  transform: none;
}

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

.deck-slide[data-slide-id="twin-portrait"] .tp__title {
  position: absolute;
  left: 174.5px;
  top: 109px;
  width: 270px;
  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: #343a40;
  white-space: nowrap;
  overflow: hidden;
  pointer-events: none;
}

.deck-slide[data-slide-id="twin-portrait"] .tp__body {
  position: absolute;
  left: 174.5px;
  top: 158px;
  width: 245px;
  height: 24px;
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 24px;
  letter-spacing: 2px;
  color: #6c7177;
  white-space: nowrap;
  overflow: hidden;
  pointer-events: none;
}

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