/* 公测福利悬顶条 —— 固定在视口顶部，滚动不消失 */

:root {
  --promo-h: 46px;
}

.promo-bar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 70;
  height: var(--promo-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid rgba(245, 158, 11, 0.24);
  background:
    radial-gradient(620px 120px at 16% 50%, rgba(245, 158, 11, 0.14), transparent 70%),
    radial-gradient(620px 120px at 84% 50%, rgba(139, 92, 246, 0.22), transparent 70%),
    linear-gradient(90deg, #08060d, #140d22 44%, #1b1108 78%, #08060d);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.38);
}

.promo-bar::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.55;
  background-image: repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.055) 0 1px, transparent 1px 9px);
  -webkit-mask-image: linear-gradient(90deg, #000, transparent 34%, transparent 66%, #000);
  mask-image: linear-gradient(90deg, #000, transparent 34%, transparent 66%, #000);
}

.promo-inner {
  position: relative;
  z-index: 1;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  white-space: nowrap;
}

.promo-tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  flex: none;
  padding: 3px 9px;
  border: 1px solid rgba(245, 158, 11, 0.38);
  border-radius: 999px;
  background: rgba(245, 158, 11, 0.1);
  color: #ffd9a0;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.promo-tag::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #f59e0b;
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.16);
  animation: promo-pulse 2.4s ease-in-out infinite;
}

@keyframes promo-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.promo-inner strong {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: #fff;
  background: linear-gradient(92deg, #fff 8%, #ffe3b8 52%, #f5b45f 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.promo-short {
  display: none;
}

.promo-sub {
  color: rgba(255, 255, 255, 0.56);
  font-size: 12.5px;
}

.promo-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex: none;
  height: 30px;
  padding: 0 14px;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(180deg, #ffd9a0, #f0a63f);
  box-shadow: 0 4px 14px rgba(240, 166, 63, 0.28);
  color: #1a1206;
  font: inherit;
  font-size: 12.5px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.promo-cta:hover {
  filter: brightness(1.06);
}

.promo-cta:focus-visible {
  outline: 2px solid #ffd9a0;
  outline-offset: 2px;
}

/* 固定头部整体下移，正文与锚点同步让出悬顶高度 */
html.has-promo {
  scroll-padding-top: calc(var(--promo-h) + var(--header-h) + 24px);
}

html.has-promo body {
  padding-top: var(--promo-h);
}

html.has-promo .site-header {
  top: var(--promo-h);
}

html.has-promo .mobile-menu {
  top: calc(var(--promo-h) + var(--header-h));
}

html.has-promo .side-nav {
  top: calc(var(--promo-h) + var(--header-h) + 28px);
}

html.has-promo .feature-block {
  scroll-margin-top: calc(var(--promo-h) + var(--header-h) + 28px);
}

html.has-promo .aside {
  top: calc(var(--promo-h) + 96px);
}

@media (max-width: 960px) {
  .promo-sub {
    display: none;
  }
}

@media (max-width: 720px) {
  :root {
    --promo-h: 42px;
  }

  .promo-inner {
    width: calc(100% - 20px);
    gap: 8px;
  }

  .promo-tag {
    display: none;
  }

  .promo-long {
    display: none;
  }

  .promo-short {
    display: inline;
  }

  .promo-inner strong {
    font-size: 12.5px;
  }

  .promo-cta {
    height: 26px;
    padding: 0 10px;
    font-size: 11.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .promo-tag::before {
    animation: none;
  }
}