/* 动态演示模式 — 配合 deck.js */
html.deck-present,
html.deck-present body {
  height: 100%;
  overflow: hidden;
  background: #0f172a;
}

html.deck-scroll body {
  background: #cbd5e1;
}

#deck-chrome {
  position: fixed;
  inset: 0;
  z-index: 1000;
  pointer-events: none;
}

#deck-chrome > * {
  pointer-events: auto;
}

.deck-toolbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 48px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 14px;
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(8px);
  color: #e2e8f0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 13px;
}

.deck-toolbar .brand {
  font-weight: 600;
  white-space: nowrap;
  margin-right: 8px;
}

.deck-toolbar .spacer { flex: 1; }

.deck-toolbar button {
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.06);
  color: inherit;
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
  font-size: 12px;
}

.deck-toolbar button:hover {
  background: rgba(255, 255, 255, 0.12);
}

.deck-toolbar button.primary {
  background: #2563eb;
  border-color: #2563eb;
}

.deck-progress {
  position: fixed;
  top: 48px;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(255, 255, 255, 0.08);
  z-index: 999;
}

.deck-progress > i {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, #2563eb, #7c3aed);
  transition: width 0.25s ease;
}

#deck-stage {
  position: fixed;
  inset: 51px 0 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  overflow: hidden;
}

html.deck-scroll #deck-chrome,
html.deck-scroll .deck-progress {
  display: none;
}

html.deck-scroll #deck-stage {
  position: static;
  inset: auto;
  padding: 0;
  overflow: visible;
}

html.deck-present .deck {
  width: min(960px, 100%);
  max-height: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

html.deck-present .slide {
  display: none;
  margin: 0;
  max-height: calc(100vh - 80px);
  overflow: auto;
  animation: deckFade 0.28s ease;
}

html.deck-present .slide.is-active {
  display: block;
}

html.deck-scroll .slide {
  display: block;
  margin-bottom: 32px;
}

@keyframes deckFade {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.deck-nav {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 1001;
}

.deck-nav button {
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: none;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 18px;
  cursor: pointer;
  backdrop-filter: blur(6px);
}

.deck-nav button:hover { background: rgba(255, 255, 255, 0.22); }

#deck-sidebar {
  position: fixed;
  top: 48px;
  right: 0;
  width: min(280px, 85vw);
  bottom: 0;
  background: rgba(15, 23, 42, 0.97);
  border-left: 1px solid rgba(255, 255, 255, 0.08);
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.25s ease;
  z-index: 1002;
  padding: 12px;
}

#deck-sidebar.open { transform: translateX(0); }

#deck-sidebar h3 {
  color: #94a3b8;
  font-size: 11px;
  letter-spacing: 0.08em;
  margin: 8px 8px 12px;
}

.deck-thumb {
  display: block;
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  background: rgba(255, 255, 255, 0.04);
  color: #e2e8f0;
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 8px;
  cursor: pointer;
  font-size: 13px;
}

.deck-thumb small {
  display: block;
  color: #64748b;
  font-size: 11px;
  margin-top: 4px;
}

.deck-thumb.active,
.deck-thumb:hover {
  border-color: #2563eb;
  background: rgba(37, 99, 235, 0.15);
}

.deck-hint {
  position: fixed;
  bottom: 72px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.45);
  font-size: 11px;
  pointer-events: none;
  white-space: nowrap;
}

html.deck-scroll .deck-nav,
html.deck-scroll .deck-hint,
html.deck-scroll #deck-sidebar {
  display: none;
}

@media print {
  #deck-chrome,
  .deck-progress,
  .deck-nav,
  .deck-hint,
  #deck-sidebar { display: none !important; }
  #deck-stage { position: static !important; inset: auto !important; padding: 0 !important; }
  html.deck-present .slide { display: block !important; max-height: none !important; }
}