/* ============================================================
   stage.css — 影片舞台（点击视频案例 → 翻转飞入全屏 → 旋转退出）
   ============================================================ */
.stage {
  position: fixed; inset: 0; z-index: 850;
  background: rgba(0, 0, 0, 0);   /* 实色 rgba，不用 backdrop-filter */
  transition: background .5s ease-out;
  perspective: 1600px;
  touch-action: none;
}
.stage.is--open { background: rgba(0, 0, 0, .90); }
.stage.is--closing { background: rgba(0, 0, 0, 0); }

.stage_frame {
  position: absolute;
  transform-origin: 50% 50%;
  transform-style: preserve-3d;
  will-change: transform, opacity;
  background: #000;
  border: 1px solid var(--line);
  box-shadow: 0 40px 120px rgba(0, 0, 0, .7);
}
.stage_video {
  display: block; width: 100%; height: 100%;
  object-fit: contain; background: #000; outline: none;
}

/* 底部信息条：沿用原站的 HUD 语言（等宽小字 + 大写 + 琥珀强调） */
.stage_bar {
  position: absolute; left: 0; right: 0; bottom: -46px;
  display: flex; align-items: center; gap: 1.2rem;
  height: 34px;
  font-family: var(--font-mono); font-size: var(--fs-xs);
  letter-spacing: .1em; text-transform: uppercase; color: var(--muted);
}
.stage_title { color: var(--paper, #fff); font-weight: 500; }
.stage_meta { opacity: .7; }
.stage_close { margin-left: auto; }
.stage_bar .btn { padding: .35rem .7rem; }

/* 右上角关闭 */
.stage_x {
  position: absolute; top: 0; right: -46px;
  width: 34px; height: 34px; display: grid; place-items: center;
  background: transparent; border: 1px solid var(--line);
  border-radius: 50%; color: var(--muted); cursor: pointer;
  font-size: 12px; line-height: 1;
  transition: color .3s, border-color .3s, transform .3s var(--ease-settle);
}
.stage_x:hover { color: var(--brand-500); border-color: var(--brand-500); transform: rotate(90deg); }

/* 可点击的视频载体：给予明确的“可进入”提示 */
.proj_media { cursor: pointer; }
.proj_media::after {
  content: "播放 ⟶";
  position: absolute; z-index: 4; left: 1rem; bottom: 1rem;
  padding: .42rem .8rem; border-radius: 99px;
  background: rgba(255, 184, 0, .92); color: #000;
  font-family: var(--font-mono); font-size: var(--fs-xs);
  letter-spacing: .1em; text-transform: uppercase;
  opacity: 0; transform: translateY(6px);
  transition: opacity .35s var(--ease-settle), transform .35s var(--ease-settle);
  pointer-events: none;
}
.proj_media:hover::after, .proj_media:focus-visible::after { opacity: 1; transform: translateY(0); }

/* 案例列表项：可点击态 */
.plist_item { cursor: pointer; }
.plist_item::after { content: "▸"; color: var(--brand-500); opacity: 0; margin-left: auto; transition: opacity .3s; }
.plist_item:hover::after, .plist_item:focus-visible::after { opacity: 1; }

/* 影像库视频卡：右上角展开按钮（原生控制条照常可用） */
.vcard { position: relative; }
.vcard_expand {
  position: absolute; z-index: 5; top: .7rem; right: .7rem;
  display: inline-flex; align-items: center; gap: .35rem;
  padding: .38rem .7rem; border-radius: 99px;
  background: rgba(0, 0, 0, .72); border: 1px solid var(--line);
  color: var(--paper, #fff); cursor: pointer;
  font-family: var(--font-mono); font-size: var(--fs-xs);
  letter-spacing: .1em; text-transform: uppercase;
  opacity: 0; transform: translateY(-4px);
  transition: opacity .35s var(--ease-settle), transform .35s var(--ease-settle), border-color .3s;
}
.vcard:hover .vcard_expand, .vcard_expand:focus-visible { opacity: 1; transform: translateY(0); }
.vcard_expand:hover { border-color: var(--brand-500); color: var(--brand-500); }

@media (max-width: 900px) {
  .stage_x { right: 0; top: -42px; }
  .stage_bar { bottom: -40px; gap: .7rem; }
}