/* ========================================================================== 
   首页「效果展示」弹窗
   始终相对手机当前可视区域水平、垂直居中。
   ========================================================================== */

.effect-demo-overlay {
  --effect-demo-panel: var(--surface);
  --effect-demo-panel-soft: var(--surface-2);
  --effect-demo-border: color-mix(in srgb, var(--line) 88%, transparent);
  --effect-demo-backdrop: rgba(3, 9, 20, .74);
  --effect-demo-viewport-height: 100dvh;

  position: fixed !important;
  z-index: 2147483000 !important;
  inset: 0 !important;
  display: flex !important;
  width: 100% !important;
  height: var(--effect-demo-viewport-height) !important;
  min-height: 0 !important;
  box-sizing: border-box !important;
  align-items: center !important;
  justify-content: center !important;
  margin: 0 !important;
  padding:
    max(12px, env(safe-area-inset-top))
    max(12px, env(safe-area-inset-right))
    max(12px, env(safe-area-inset-bottom))
    max(12px, env(safe-area-inset-left)) !important;
  overflow: hidden !important;
  opacity: 0;
  visibility: hidden;
  isolation: isolate;
  transition: opacity .2s ease, visibility .2s ease;
}

.effect-demo-overlay[hidden] {
  display: none !important;
}

.effect-demo-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.effect-demo-backdrop {
  position: absolute !important;
  z-index: 0;
  inset: 0 !important;
  width: 100% !important;
  height: 100% !important;
  margin: 0 !important;
  padding: 0 !important;
  border: 0 !important;
  background: var(--effect-demo-backdrop);
  backdrop-filter: blur(9px);
  -webkit-backdrop-filter: blur(9px);
  cursor: default;
}

.effect-demo-card {
  position: relative !important;
  z-index: 1;
  inset: auto !important;
  display: block;
  width: min(960px, 100%) !important;
  max-width: 960px !important;
  max-height: calc(var(--effect-demo-viewport-height) - 24px) !important;
  box-sizing: border-box !important;
  flex: 0 1 auto !important;
  align-self: center !important;
  margin: auto !important;
  overflow: auto !important;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--effect-demo-border);
  border-radius: 22px;
  background: var(--effect-demo-panel);
  box-shadow: 0 28px 80px rgba(0, 0, 0, .34);
  transform: translateY(12px) scale(.985);
  transform-origin: center;
  transition: transform .22s ease;
}

.effect-demo-overlay.is-open .effect-demo-card {
  transform: translateY(0) scale(1);
}

.effect-demo-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--effect-demo-border);
}

.effect-demo-header h2 {
  margin: 4px 0 0;
  color: var(--text-strong);
  font-size: clamp(20px, 3vw, 27px);
  letter-spacing: -.025em;
}

.effect-demo-eyebrow {
  color: var(--primary);
  font: 760 9px/1 var(--font-mono);
  letter-spacing: .15em;
}

.effect-demo-close {
  display: grid;
  width: 40px;
  height: 40px;
  flex: 0 0 40px;
  place-items: center;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--muted);
  background: var(--effect-demo-panel-soft);
  font: 400 27px/1 var(--font-sans);
  cursor: pointer;
}

.effect-demo-close:hover {
  border-color: color-mix(in srgb, var(--primary) 44%, var(--line));
  color: var(--text-strong);
  background: var(--primary-soft);
}

.effect-demo-close:focus-visible,
.demo-hero-btn:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--primary) 28%, transparent);
  outline-offset: 3px;
}

.effect-demo-stage {
  padding: clamp(10px, 2vw, 18px);
  background: #05080d;
}

.effect-demo-stage video {
  display: block;
  width: 100%;
  max-height: min(67dvh, 650px);
  aspect-ratio: 16 / 9;
  border: 0;
  border-radius: 13px;
  background: #000;
  object-fit: contain;
}

.effect-demo-footer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px;
  min-height: 72px;
  padding: 15px 20px 17px;
  border-top: 1px solid var(--effect-demo-border);
  background: var(--effect-demo-panel-soft);
}

.effect-demo-footer p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.65;
}

.effect-demo-state {
  min-width: 0;
  color: var(--primary) !important;
  font-weight: 750;
  text-align: right;
  white-space: nowrap;
}

html.effect-demo-open,
body.effect-demo-open {
  overflow: hidden !important;
  overscroll-behavior: none;
}

html[data-theme="light"] .effect-demo-overlay {
  --effect-demo-backdrop: rgba(13, 23, 42, .58);
}

@media (max-width: 680px) {
  .effect-demo-overlay {
    inset: 0 !important;
    align-items: center !important;
    justify-content: center !important;
    padding:
      max(10px, env(safe-area-inset-top))
      max(10px, env(safe-area-inset-right))
      max(10px, env(safe-area-inset-bottom))
      max(10px, env(safe-area-inset-left)) !important;
  }

  .effect-demo-card {
    width: calc(100vw - 20px) !important;
    max-width: 560px !important;
    max-height: calc(var(--effect-demo-viewport-height) - 20px) !important;
    align-self: center !important;
    margin: auto !important;
    border-radius: 20px !important;
  }

  .effect-demo-header {
    padding: 14px 15px;
  }

  .effect-demo-header h2 {
    font-size: 22px;
  }

  .effect-demo-stage {
    padding: 8px;
  }

  .effect-demo-stage video {
    max-height: min(calc(var(--effect-demo-viewport-height) * .42), 390px);
    border-radius: 10px;
  }

  .effect-demo-footer {
    grid-template-columns: 1fr;
    gap: 6px;
    min-height: 0;
    padding: 12px 15px 14px;
  }

  .effect-demo-state {
    text-align: left;
    white-space: normal;
  }
}

@media (max-width: 680px) and (max-height: 620px) {
  .effect-demo-header {
    padding-top: 10px;
    padding-bottom: 10px;
  }

  .effect-demo-header h2 {
    font-size: 20px;
  }

  .effect-demo-stage video {
    max-height: min(calc(var(--effect-demo-viewport-height) * .34), 260px);
  }

  .effect-demo-footer {
    padding-top: 9px;
    padding-bottom: 10px;
  }
}

@supports not (height: 100dvh) {
  .effect-demo-overlay {
    --effect-demo-viewport-height: 100vh;
  }
}

@media (prefers-reduced-motion: reduce) {
  .effect-demo-overlay,
  .effect-demo-card {
    transition: none;
  }
}