/* ==========================================================================
   动效（由 assets/js/modules/motion.js 驱动；html.js 表示脚本已运行）
   ========================================================================== */

/* 首屏标题逐行升起、其余文字淡入 */
.line-mask {
  display: block;
  overflow: hidden;
  padding-bottom: 0.06em;
  margin-bottom: -0.06em;
}

.line-mask > span {
  display: block;
}

.js .line-mask > span {
  transform: translateY(105%);
  transition: transform 1.3s var(--ease);
}

.js .loaded .line-mask > span {
  transform: none;
}

.js .loaded .line-mask:nth-child(2) > span {
  transition-delay: 0.12s;
}

.js [data-hero-fade] {
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 1s var(--ease) 0.5s,
    transform 1s var(--ease) 0.5s;
}

.js .loaded [data-hero-fade] {
  opacity: 1;
  transform: none;
}

/* 滚动逐字点亮：--o 由脚本按滚动位置设置 */
.w {
  transition: opacity 0.2s linear;
}

[data-words] .w,
[data-fly-words] .w {
  opacity: var(--o, 1);
}

/* 进入视口时上浮；--i 为同组内的序号，用于依次出现 */
.js [data-up] {
  opacity: 0;
  transform: translateY(32px);
  transition:
    opacity 1.1s var(--ease),
    transform 1.1s var(--ease);
  transition-delay: calc(var(--i, 0) * 90ms);
}

.js [data-up].in {
  opacity: 1;
  transform: none;
}

/* 图片揭示：由内向外展开 */
.js [data-reveal] {
  clip-path: inset(10% 8% 10% 8% round 6px);
  transition: clip-path 1.5s var(--ease);
}

.js [data-reveal] img,
.js [data-reveal] video {
  transform: scale(1.18);
  transition: transform 1.8s var(--ease);
}

.js [data-reveal].in {
  clip-path: inset(0 0 0 0 round 6px);
}

.js [data-reveal].in img,
.js [data-reveal].in video {
  transform: scale(1);
}

/* 背景视频：缓冲充足后淡入（由 modules/video.js 加 .ready），之前显示所在容器的封面图 */
.js video[data-fade] {
  opacity: 0;
  transition: opacity 0.8s var(--ease);
}

.js video[data-fade].ready {
  opacity: 1;
}