/* ========== 宣传页面特有样式 ========== */
.promo-page {
  max-width: 500px;
  margin: 0 auto;
  padding: 0 12px 32px;
}

.promo-page-header {
  text-align: center;
  padding: 12px 20px 4px;
  position: relative;
}
.promo-page-header h1 {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--color-ink-strong);
  margin-bottom: 2px;
}
.promo-page-header .subtitle {
  font-size: 12px;
  color: var(--color-ink-soft);
  letter-spacing: 0.08em;
}
.promo-page-header::after {
  content: '';
  display: block;
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  margin: 6px auto 0;
}

/* 卡片列表 */
.promo-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 2px;
}

.promo-card {
  position: relative;
  width: 100%;
  border-radius: 14px;
  overflow: visible;
  cursor: pointer;
  transition: transform 0.35s cubic-bezier(.22,1,.36,1);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  /* 离屏卡片跳过渲染，大幅减少首屏渲染开销 */
  content-visibility: auto;
  contain-intrinsic-size: auto 200px;
  /* GPU 加速 + 内容隔离 */
  will-change: transform;
  contain: layout style;
}
.promo-card:active {
  transform: scale(0.97);
}

/* 3D 立体阴影层 */
.promo-card-shadow {
  position: absolute;
  bottom: -8px;
  left: 6%;
  width: 88%;
  height: 30px;
  background: rgba(0,0,0,0.15);
  border-radius: 50%;
  filter: blur(16px);
  z-index: 0;
  transition: all 0.35s cubic-bezier(.22,1,.36,1);
}
.promo-card:active .promo-card-shadow {
  bottom: -4px;
  filter: blur(10px);
  opacity: 0.6;
}
body.dark-theme .promo-card-shadow { background: rgba(0,0,0,0.5); }

/* 卡片主体 */
.promo-card-inner {
  position: relative;
  z-index: 1;
  border-radius: 14px;
  overflow: hidden;
  aspect-ratio: 12 / 5;
  background: var(--color-paper);
  box-shadow:
    0 8px 32px rgba(0,0,0,0.12),
    0 2px 8px rgba(139,105,20,0.12),
    inset 0 1px 0 rgba(255,255,255,0.05);
  border: 1px solid var(--color-card-border);
  transition: box-shadow 0.35s cubic-bezier(.22,1,.36,1);
}
.promo-card:active .promo-card-inner {
  box-shadow:
    0 4px 16px rgba(0,0,0,0.15),
    0 1px 4px rgba(139,105,20,0.15);
}
/* 暗色主题卡片 */
body.dark-theme .promo-card-inner {
  box-shadow:
    0 8px 32px rgba(0,0,0,0.5),
    0 2px 8px rgba(201,169,110,0.15),
    inset 0 1px 0 rgba(255,255,255,0.05);
}
body.dark-theme .promo-card:active .promo-card-inner {
  box-shadow:
    0 4px 16px rgba(0,0,0,0.6),
    0 1px 4px rgba(201,169,110,0.2);
}

/* 立体边框光泽 */
.promo-card-inner::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: 15px;
  padding: 1px;
  background: linear-gradient(135deg,
    rgba(139,105,20,0.18) 0%,
    rgba(139,105,20,0.05) 30%,
    transparent 50%,
    rgba(139,105,20,0.05) 70%,
    rgba(139,105,20,0.25) 100%
  );
  mask-composite: exclude;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  z-index: 3;
  pointer-events: none;
}
body.dark-theme .promo-card-inner::before {
  background: linear-gradient(135deg,
    rgba(255,255,255,0.2) 0%,
    rgba(255,255,255,0.05) 30%,
    rgba(255,255,255,0) 50%,
    rgba(255,255,255,0.05) 70%,
    rgba(201,169,110,0.3) 100%
  );
}

/* 光泽高光 */
.promo-card-inner::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 30% 20%,
    rgba(255,255,255,0.18) 0%,
    transparent 60%
  );
  z-index: 4;
  pointer-events: none;
}
body.dark-theme .promo-card-inner::after {
  background: radial-gradient(ellipse at 30% 20%,
    rgba(255,255,255,0.12) 0%,
    transparent 60%
  );
}

.promo-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  position: relative;
  z-index: 1;
}

/* 标题覆盖层 */
.promo-card-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 5;
  padding: 28px 14px 10px;
  background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.35) 60%, rgba(0,0,0,0.6) 100%);
}
.promo-card-label span {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  text-shadow: 0 1px 3px rgba(0,0,0,0.5);
  letter-spacing: 0.03em;
}

/* 空状态 */
.promo-empty {
  text-align: center;
  padding: 80px 20px;
  color: var(--color-ink-soft);
}
.promo-empty .empty-icon { font-size: 48px; margin-bottom: 12px; }
.promo-empty .empty-text { font-size: 14px; }

/* 移动端适配：当底部导航存在时留出空间 */
@media (max-width: 768px) {
  body.has-bottom-nav .promo-page {
    padding-bottom: 80px;
  }
}

/* 桌面端分类导航 */
.category-nav a.category-btn {
  display: inline-flex;
  text-decoration: none;
  line-height: 1.2;
}

/* ========== 详情弹窗 ========== */
.promo-detail-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s ease, visibility .25s ease;
}
.promo-detail-overlay.show {
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
}

@keyframes promoFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.promo-detail-modal {
  background: var(--color-paper);
  border-radius: 14px;
  max-width: 500px;
  width: 100%;
  max-height: 85vh;
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(0,0,0,0.2);
  transform: translateY(0);
  transition: transform .3s cubic-bezier(.22,1,.36,1), opacity .3s cubic-bezier(.22,1,.36,1);
  position: relative;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  will-change: transform;
  contain: layout style;
}
.promo-detail-overlay .promo-detail-modal {
  transform: translateY(30px);
  opacity: 0;
}
.promo-detail-overlay.show .promo-detail-modal {
  transform: translateY(0);
  opacity: 1;
}
@keyframes promoSlideUp {
  from { transform: translateY(30px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
.promo-detail-close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(0,0,0,0.45);
  border: none;
  color: #fff;
  font-size: 16px;
  cursor: pointer;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .2s;
}
.promo-detail-close:hover { background: rgba(0,0,0,0.65); }
.promo-detail-body {
  padding: 24px;
  box-sizing: border-box;
  overflow-y: auto;
  overflow-x: hidden;
  flex: 1;
}
.promo-detail-body h3 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-ink-strong);
  line-height: 1.4;
}
.promo-detail-body .promo-detail-content {
  margin: 0 0 14px;
  font-size: 14px;
  color: var(--color-ink-mid);
  line-height: 1.7;
  word-wrap: break-word;
}
.promo-detail-body .promo-detail-content img {
  max-width: 100%;
  border-radius: 8px;
  margin: 8px 0;
  cursor: zoom-in;
}
.promo-detail-body .promo-detail-content img:hover {
  opacity: 0.9;
}

/* 图片放大预览 */
.promo-img-zoom {
  position: fixed;
  inset: 0;
  z-index: 99999;
  background: rgba(0,0,0,0.85);
  display: none;
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
}
.promo-img-zoom.show { display: flex; }
.promo-img-zoom img {
  max-width: 95vw;
  max-height: 95vh;
  object-fit: contain;
  border-radius: 8px;
}
.promo-img-zoom-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  border: 2px solid rgba(255,255,255,0.4);
  color: #fff;
  font-size: 20px;
  cursor: pointer;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .2s, transform .2s;
  line-height: 1;
}
.promo-img-zoom-close:hover {
  background: rgba(255,255,255,0.35);
  transform: scale(1.1);
}
.promo-detail-body .promo-detail-content a {
  color: #8B6914;
  text-decoration: underline;
}
.promo-detail-body .promo-detail-content b,
.promo-detail-body .promo-detail-content strong {
  color: var(--color-ink-strong);
}
.promo-detail-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 24px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: #fff;
  border: none;
  border-radius: 22px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: opacity .2s, transform .2s;
}
.promo-detail-link-btn:hover { opacity: 0.9; }
.promo-detail-link-btn:active { transform: scale(0.96); }
body.dark-theme .promo-detail-modal {
  border: 1px solid rgba(255,255,255,0.1);
}
body.dark-theme .promo-detail-close {
  background: rgba(255,255,255,0.25);
}

/* ========== 微信引导遮罩 ========== */
.wechat-guide-overlay {
  display: none;
  position: fixed;
  z-index: 99999;
  inset: 0;
  background: linear-gradient(180deg, #f8fbff 0%, #eef5ff 100%);
  padding: 0 6px 12px;
  box-sizing: border-box;
  overflow: auto;
}
.wechat-guide-container {
  max-width: 360px;
  margin: 0 auto;
  text-align: center;
  transform: translateY(20px);
}
.wechat-guide-bubble {
  background: #fff;
  border-radius: 18px;
  padding: 16px 18px;
  box-shadow: 0 4px 24px rgba(43,125,233,.12);
  position: relative;
  border: 1px solid rgba(43,125,233,.15);
  text-align: left;
  display: inline-block;
  max-width: 100%;
}
.wechat-guide-bubble p {
  margin: 0;
  font-size: 15px;
  color: #333;
  line-height: 1.6;
}
.wechat-guide-dot {
  display: inline-block;
  width: 26px;
  height: 26px;
  line-height: 26px;
  text-align: center;
  background: #333;
  color: #fff;
  border-radius: 5px;
  font-size: 12px;
  vertical-align: middle;
}
.wechat-guide-hl {
  color: #2b7de9;
  font-weight: 600;
}
.wechat-guide-arrow {
  position: absolute;
  top: -10px;
  right: 10px;
  pointer-events: none;
  z-index: 1;
}
.wechat-guide-preview-area {
  max-width: 340px;
  width: 92%;
  margin: 66px auto 0;
  text-align: center;
  padding: 10px;
  background: #fff;
  border-radius: 36px;
  box-shadow: 0 16px 48px rgba(43,125,233,.18);
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  position: relative;
  z-index: 2;
}
.wechat-guide-phone {
  width: 220px;
  height: 360px;
  margin: 0 auto;
  border-radius: 28px;
  position: relative;
}
.wechat-guide-phone-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  box-sizing: border-box;
}
.wechat-guide-card {
  background: #fff;
  border-radius: 16px;
  padding: 24px 18px;
  box-shadow: 0 4px 20px rgba(0,0,0,.08);
  text-align: center;
  width: 100%;
}
.wechat-guide-card-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto;
  background: #e8f1fc;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.wechat-guide-card-icon span { font-size: 32px; }
.wechat-guide-card p {
  margin-top: 14px;
  font-size: 15px;
  color: #333;
  font-weight: 500;
}