/**
 * ============================================================================
 * 乾坤堂 · 全系全机型 PWA 主动桌面安装引导机箱样式 (QKT Install Booster CSS)
 * 作用: 兼容 安卓(华为/小米/OPPO/vivo)一键安装 + 苹果 iOS Safari 底部手势指引 + 微信环境提示
 * ============================================================================
 */

/* 1. 浮动安装操作胶囊 (常驻主屏右下角或底部，低调高雅) */
.qkt-pwa-float-capsule {
  position: fixed;
  bottom: calc(24px + env(safe-area-inset-bottom));
  right: 16px;
  z-index: 9998;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: linear-gradient(135deg, rgba(30, 24, 20, 0.95), rgba(45, 30, 22, 0.95));
  border: 1px solid rgba(212, 175, 55, 0.6);
  border-radius: 30px;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.45), 0 0 10px rgba(212, 175, 55, 0.25);
  cursor: pointer;
  color: #f7e7c4;
  font-size: 13px;
  font-family: -apple-system, "Noto Serif SC", STSong, serif;
  letter-spacing: 0.5px;
  transition: transform 0.25s ease, opacity 0.25s ease;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.qkt-pwa-float-capsule:hover {
  transform: translateY(-2px) scale(1.02);
  border-color: #ffd875;
}

.qkt-pwa-float-capsule .pwa-icon {
  font-size: 16px;
  animation: qktPulseGlow 2s infinite ease-in-out;
}

@keyframes qktPulseGlow {
  0%, 100% { transform: scale(1); filter: drop-shadow(0 0 2px #d4af37); }
  50% { transform: scale(1.15); filter: drop-shadow(0 0 6px #ffd875); }
}

/* 2. 底部抽屉式智能安装引导弹窗 (Bottom Sheet) */
.qkt-pwa-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.65);
  display: none;
  align-items: flex-end;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.qkt-pwa-modal-overlay.show {
  display: flex;
  opacity: 1;
}

.qkt-pwa-sheet {
  width: 100%;
  max-width: 520px;
  background: linear-gradient(180deg, #1f1a17 0%, #161210 100%);
  border-top-left-radius: 20px;
  border-top-right-radius: 20px;
  border: 1px solid rgba(212, 175, 55, 0.35);
  border-bottom: none;
  padding: 20px 20px calc(24px + env(safe-area-inset-bottom)) 20px;
  box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.6);
  transform: translateY(100%);
  transition: transform 0.32s cubic-bezier(0.16, 1, 0.3, 1);
  color: #ede6d8;
  position: relative;
}

.qkt-pwa-modal-overlay.show .qkt-pwa-sheet {
  transform: translateY(0);
}

/* 抽屉手柄 */
.qkt-pwa-sheet-handle {
  width: 40px;
  height: 4px;
  background: rgba(212, 175, 55, 0.4);
  border-radius: 2px;
  margin: -8px auto 14px auto;
}

/* 头部品牌行 */
.qkt-pwa-sheet-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.qkt-pwa-app-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  border: 1px solid rgba(212, 175, 55, 0.5);
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.4);
  object-fit: contain;
  background: #110d0a;
}

.qkt-pwa-sheet-title {
  font-size: 17px;
  font-weight: 600;
  color: #fce3a6;
  letter-spacing: 0.5px;
  margin: 0;
}

.qkt-pwa-sheet-desc {
  font-size: 12px;
  color: #bfaea2;
  margin: 3px 0 0 0;
}

.qkt-pwa-close-btn {
  position: absolute;
  top: 14px;
  right: 16px;
  background: none;
  border: none;
  color: #8c7c72;
  font-size: 20px;
  cursor: pointer;
  padding: 6px;
  line-height: 1;
}

/* 核心价值亮点卡片 */
.qkt-pwa-feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 14px 0 18px 0;
  background: rgba(30, 23, 19, 0.6);
  padding: 10px;
  border-radius: 10px;
  border: 1px solid rgba(212, 175, 55, 0.15);
}

.qkt-pwa-feature-item {
  text-align: center;
  font-size: 11.5px;
  color: #ded6c9;
}

.qkt-pwa-feature-item .feat-icon {
  font-size: 18px;
  margin-bottom: 3px;
  display: block;
}

/* iOS 手势引导指引框 */
.qkt-pwa-ios-guide {
  background: rgba(212, 175, 55, 0.08);
  border: 1px dashed rgba(212, 175, 55, 0.4);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: #f3dfb7;
  margin-bottom: 16px;
}

.qkt-pwa-ios-step {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 4px 0;
}

.qkt-pwa-ios-step .step-badge {
  background: #8b1e1e;
  color: #fff;
  font-size: 11px;
  font-weight: bold;
  padding: 1px 6px;
  border-radius: 10px;
  flex-shrink: 0;
}

/* 操作主按钮 */
.qkt-pwa-primary-btn {
  width: 100%;
  padding: 12px 0;
  background: linear-gradient(135deg, #b5341f 0%, #8e2515 100%);
  border: 1px solid rgba(254, 214, 121, 0.5);
  border-radius: 25px;
  color: #fff2c2;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 1px;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(181, 52, 31, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: opacity 0.2s;
}

.qkt-pwa-primary-btn:active {
  opacity: 0.85;
}

.qkt-pwa-sub-btn {
  background: none;
  border: none;
  color: #8c7c72;
  font-size: 12px;
  margin-top: 10px;
  cursor: pointer;
  width: 100%;
  text-align: center;
}