:root {
  --bg: #0a0a0a;
  --bg-deep: #050505;
  --gold: #d6b155;
  --gold-strong: #f3dd8f;
  --gold-soft: rgba(214, 177, 85, 0.35);
  --text: #f5e8b8;
  --muted: #c9bb8c;
  --card-bg: rgba(15, 15, 18, 0.86);
  --gold-filter: brightness(0) saturate(100%) invert(83%) sepia(28%) saturate(630%)
    hue-rotate(2deg) brightness(96%) contrast(92%);
}

body.aiqet-landing {
  min-height: 100vh;
  background: var(--bg-deep);
  color: var(--text);
  font-family: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC",
    "WenQuanYi Micro Hei", sans-serif;
  letter-spacing: 0.02em;
  overflow-x: hidden;
}

body.aiqet-landing * {
  box-sizing: border-box;
}

body.aiqet-landing a {
  color: inherit;
}

.constellation {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.65;
}

.aiqet-shell {
  position: relative;
  min-height: 100vh;
  padding: 32px 24px 40px;
  overflow: hidden;
  z-index: 1;
  background: radial-gradient(circle at 20% 10%, rgba(214, 177, 85, 0.18), transparent 55%),
    radial-gradient(circle at 80% 15%, rgba(214, 177, 85, 0.12), transparent 60%),
    radial-gradient(circle at 60% 70%, rgba(214, 177, 85, 0.08), transparent 55%);
}

.aiqet-shell::before {
  content: "";
  position: absolute;
  inset: -20% -10% -10% -10%;
  background: linear-gradient(120deg, rgba(0, 0, 0, 0.78), transparent 45%),
    radial-gradient(circle at 30% 40%, rgba(18, 14, 6, 0.68), transparent 60%);
  z-index: 0;
}

.aiqet-shell::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg%20xmlns%3D%27http%3A//www.w3.org/2000/svg%27%20width%3D%27800%27%20height%3D%27600%27%20viewBox%3D%270%200%20800%20600%27%3E%0A%20%20%3Cg%20stroke%3D%27%23d6b155%27%20stroke-opacity%3D%270.35%27%20stroke-width%3D%271.2%27%3E%0A%20%20%20%20%3Cline%20x1%3D%2740%27%20y1%3D%2780%27%20x2%3D%27160%27%20y2%3D%2730%27/%3E%0A%20%20%20%20%3Cline%20x1%3D%27160%27%20y1%3D%2730%27%20x2%3D%27250%27%20y2%3D%2790%27/%3E%0A%20%20%20%20%3Cline%20x1%3D%27250%27%20y1%3D%2790%27%20x2%3D%27340%27%20y2%3D%2760%27/%3E%0A%20%20%20%20%3Cline%20x1%3D%27480%27%20y1%3D%2780%27%20x2%3D%27620%27%20y2%3D%2740%27/%3E%0A%20%20%20%20%3Cline%20x1%3D%27620%27%20y1%3D%2740%27%20x2%3D%27720%27%20y2%3D%27120%27/%3E%0A%20%20%20%20%3Cline%20x1%3D%27120%27%20y1%3D%27360%27%20x2%3D%27220%27%20y2%3D%27280%27/%3E%0A%20%20%20%20%3Cline%20x1%3D%27220%27%20y1%3D%27280%27%20x2%3D%27320%27%20y2%3D%27340%27/%3E%0A%20%20%20%20%3Cline%20x1%3D%27560%27%20y1%3D%27320%27%20x2%3D%27700%27%20y2%3D%27260%27/%3E%0A%20%20%20%20%3Cline%20x1%3D%27480%27%20y1%3D%27480%27%20x2%3D%27640%27%20y2%3D%27520%27/%3E%0A%20%20%3C/g%3E%0A%20%20%3Cg%20fill%3D%27%23d6b155%27%20fill-opacity%3D%270.6%27%3E%0A%20%20%20%20%3Ccircle%20cx%3D%2740%27%20cy%3D%2780%27%20r%3D%272%27/%3E%0A%20%20%20%20%3Ccircle%20cx%3D%27160%27%20cy%3D%2730%27%20r%3D%272%27/%3E%0A%20%20%20%20%3Ccircle%20cx%3D%27250%27%20cy%3D%2790%27%20r%3D%272%27/%3E%0A%20%20%20%20%3Ccircle%20cx%3D%27340%27%20cy%3D%2760%27%20r%3D%272%27/%3E%0A%20%20%20%20%3Ccircle%20cx%3D%27480%27%20cy%3D%2780%27%20r%3D%272%27/%3E%0A%20%20%20%20%3Ccircle%20cx%3D%27620%27%20cy%3D%2740%27%20r%3D%272%27/%3E%0A%20%20%20%20%3Ccircle%20cx%3D%27720%27%20cy%3D%27120%27%20r%3D%272%27/%3E%0A%20%20%20%20%3Ccircle%20cx%3D%27120%27%20cy%3D%27360%27%20r%3D%272%27/%3E%0A%20%20%20%20%3Ccircle%20cx%3D%27220%27%20cy%3D%27280%27%20r%3D%272%27/%3E%0A%20%20%20%20%3Ccircle%20cx%3D%27320%27%20cy%3D%27340%27%20r%3D%272%27/%3E%0A%20%20%20%20%3Ccircle%20cx%3D%27560%27%20cy%3D%27320%27%20r%3D%272%27/%3E%0A%20%20%20%20%3Ccircle%20cx%3D%27700%27%20cy%3D%27260%27%20r%3D%272%27/%3E%0A%20%20%20%20%3Ccircle%20cx%3D%27480%27%20cy%3D%27480%27%20r%3D%272%27/%3E%0A%20%20%20%20%3Ccircle%20cx%3D%27640%27%20cy%3D%27520%27%20r%3D%272%27/%3E%0A%20%20%3C/g%3E%0A%3C/svg%3E");
  background-size: 700px 520px;
  background-repeat: repeat;
  opacity: 0.2;
  z-index: 0;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 1;
}

.site-logo {
  width: 88px;
  height: 88px;
  object-fit: contain;
  filter: var(--gold-filter) drop-shadow(0 0 20px rgba(214, 177, 85, 0.6))
    drop-shadow(0 0 36px rgba(214, 177, 85, 0.35));
}

.settings-btn {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--gold-soft);
  background: rgba(12, 12, 12, 0.65);
  color: var(--gold-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: default;
  box-shadow: 0 0 18px rgba(214, 177, 85, 0.15);
  display: none;
}

.settings-btn svg {
  width: 20px;
  height: 20px;
}

.hero {
  position: relative;
  z-index: 1;
  max-width: 1080px;
  margin: 80px auto 0;
  text-align: center;
}

.hero-logo-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 18px;
  animation: rise 0.7s ease-out both;
}

.hero-logo {
  width: 52px;
  height: 52px;
  object-fit: contain;
  filter: var(--gold-filter) drop-shadow(0 0 14px rgba(214, 177, 85, 0.65))
    drop-shadow(0 0 28px rgba(214, 177, 85, 0.35));
  transform-style: preserve-3d;
  backface-visibility: hidden;
  animation: flip-in 0.9s ease-out 0.15s both;
}

.hero-title {
  font-family: "Rajdhani", "Noto Sans SC", "PingFang SC", sans-serif;
  font-size: clamp(32px, 5vw, 64px);
  font-weight: 600;
  margin: 26px 0 12px;
  color: var(--gold-strong);
  text-shadow: 0 18px 40px rgba(214, 177, 85, 0.25);
  animation: rise 0.8s ease-out 0.1s both;
}

.hero-tagline {
  margin: 10px auto 0;
  max-width: 780px;
  text-align: center;
  animation: rise 0.8s ease-out 0.2s both;
}

.hero-cn {
  font-size: clamp(18px, 2.6vw, 30px);
  font-weight: 600;
  color: var(--gold-strong);
  letter-spacing: 0.08em;
  line-height: 1.4;
}

.hero-en {
  margin-top: 8px;
  font-size: clamp(12px, 1.2vw, 16px);
  color: var(--muted);
  letter-spacing: 0.06em;
  line-height: 1.6;
}

.card-grid {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.feature-card {
  position: relative;
  background: var(--card-bg);
  border: 1px solid rgba(214, 177, 85, 0.35);
  border-radius: 18px;
  padding: 22px 22px 26px;
  text-align: left;
  min-height: 150px;
  box-shadow: 0 22px 46px rgba(0, 0, 0, 0.45);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
  animation: rise 0.8s ease-out both;
  animation-delay: var(--delay, 0s);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--gold-strong);
  box-shadow: 0 24px 60px rgba(214, 177, 85, 0.2);
}

.card-icon {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(214, 177, 85, 0.14);
  border: 1px solid rgba(214, 177, 85, 0.4);
  color: var(--gold-strong);
  margin-bottom: 16px;
}

.card-icon svg {
  width: 22px;
  height: 22px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--gold-strong);
}

.feature-card p {
  margin-top: 8px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
}

.site-footer {
  margin-top: 70px;
  display: flex;
  justify-content: center;
  gap: 24px;
  font-size: 12px;
  color: rgba(214, 177, 85, 0.7);
  position: relative;
  z-index: 1;
}

.site-footer a {
  color: rgba(214, 177, 85, 0.9);
}

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(3, 3, 3, 0.85);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s ease, visibility 0.25s ease;
  z-index: 10;
}

.overlay:target {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.overlay::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(214, 177, 85, 0.12), transparent 55%),
    radial-gradient(circle at 70% 80%, rgba(214, 177, 85, 0.08), transparent 60%);
  opacity: 0.9;
}

.overlay-backdrop {
  position: absolute;
  inset: 0;
}

.overlay-inner {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 80px auto 80px;
  padding: 0 24px 40px;
}

.overlay-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 30px;
}

.panel-mark {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  border: 1px solid var(--gold-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(214, 177, 85, 0.12);
  box-shadow: 0 0 20px rgba(214, 177, 85, 0.2);
}

.panel-mark svg {
  width: 26px;
  height: 26px;
}

.panel-kicker {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 6px;
}

.overlay-header h2 {
  font-size: clamp(24px, 3vw, 40px);
  color: var(--gold-strong);
}

.overlay-close {
  margin-left: auto;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid var(--gold-soft);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--gold-strong);
  background: rgba(10, 10, 10, 0.7);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.overlay-close:hover {
  border-color: var(--gold-strong);
  transform: translateY(-2px);
}

.panel-stack {
  display: grid;
  gap: 18px;
}

.info-card {
  background: var(--card-bg);
  border: 1px solid rgba(214, 177, 85, 0.35);
  border-radius: 16px;
  padding: 22px 24px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}

.info-card h3 {
  font-size: 18px;
  color: var(--gold-strong);
  margin-bottom: 12px;
}

.info-card p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.info-card ul {
  margin: 0;
  padding: 0;
}

.info-card li {
  list-style: none;
  position: relative;
  padding-left: 18px;
  margin: 8px 0;
  color: var(--muted);
  line-height: 1.7;
  font-size: 14px;
}

.info-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold-strong);
  box-shadow: 0 0 10px rgba(214, 177, 85, 0.6);
}

.qr-code {
  width: 140px;
  height: auto;
  margin-top: 12px;
  border-radius: 10px;
  border: 1px solid rgba(214, 177, 85, 0.35);
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.35);
}

.info-card--split {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.timeline-card h3 {
  display: flex;
  align-items: center;
  gap: 12px;
}

.timeline-card h3::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gold-strong);
  box-shadow: 0 0 12px rgba(214, 177, 85, 0.65);
}

@media (max-width: 960px) {
  .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero {
    margin-top: 60px;
  }
}

@media (max-width: 720px) {
  .card-grid {
    grid-template-columns: 1fr;
  }

  .overlay-inner {
    margin: 60px auto 60px;
  }

  .overlay-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .overlay-close {
    align-self: flex-end;
  }
}

@media (max-width: 540px) {
  .aiqet-shell {
    padding: 24px 18px 32px;
  }

  .site-footer {
    flex-direction: column;
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-6px);
  }
}

@keyframes flip-in {
  0% {
    opacity: 0;
    transform: rotateY(120deg) scale(0.85);
  }
  60% {
    opacity: 1;
    transform: rotateY(-20deg) scale(1.05);
  }
  100% {
    opacity: 1;
    transform: rotateY(0deg) scale(1);
  }
}