/* ===== About / Promo Page ===== */

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, sans-serif;
  color: #1C1917;
  background: #FAFAF9;
  overflow-x: hidden;
}

.ab-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
}

/* === Nav === */
.ab-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: rgba(250, 250, 249, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(231, 229, 228, 0.5);
}

.ab-nav-back {
  color: #78716C;
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}
.ab-nav-back:hover { color: #1C1917; }

.ab-nav-logo {
  font-family: 'Playfair Display', serif;
  font-weight: 700;
  font-size: 16px;
}

/* === Hero === */
.ab-hero {
  position: relative;
  padding: 140px 24px 80px;
  text-align: center;
  overflow: hidden;
}

.ab-hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(28,25,23,0.03) 0%, transparent 70%),
    radial-gradient(circle at 30% 80%, rgba(217,119,6,0.05) 0%, transparent 50%);
}

.ab-hero-content {
  position: relative;
  z-index: 1;
}

.ab-hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: #1C1917;
  color: #FAFAF9;
  border-radius: 20px;
  font-size: 12px;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.5px;
  margin-bottom: 24px;
}

.ab-hero-title {
  font-family: 'Playfair Display', serif;
  font-size: 56px;
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 8px;
}

.ab-hero-subtitle {
  font-family: 'JetBrains Mono', monospace;
  font-size: 16px;
  color: #A8A29E;
  letter-spacing: 2px;
  margin-bottom: 24px;
}

.ab-hero-desc {
  font-size: 17px;
  color: #57534E;
  line-height: 1.8;
  max-width: 680px;
  margin: 0 auto 32px;
}

.ab-hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.ab-btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  font-family: inherit;
}

.ab-btn-primary {
  background: linear-gradient(135deg, #1C1917, #292524);
  color: #fff;
}
.ab-btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }

.ab-btn-outline {
  border: 1px solid #D6D3D1;
  color: #44403C;
  background: #fff;
}
.ab-btn-outline:hover { border-color: #1C1917; color: #1C1917; }

/* === Sections === */
.ab-section {
  padding: 80px 0;
}

.ab-section-title {
  font-family: 'Playfair Display', serif;
  font-size: 32px;
  font-weight: 900;
  text-align: center;
  margin-bottom: 16px;
}

.ab-section-desc {
  text-align: center;
  color: #78716C;
  font-size: 15px;
  margin-bottom: 48px;
}

/* === What Grid === */
.ab-what-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.ab-what-card {
  background: #fff;
  border: 1px solid #E7E5E4;
  border-radius: 12px;
  padding: 32px 24px;
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
}
.ab-what-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(28,25,23,0.08);
}

.ab-what-emoji {
  font-size: 40px;
  margin-bottom: 16px;
}

.ab-what-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.ab-what-card p {
  font-size: 14px;
  color: #78716C;
  line-height: 1.6;
}

/* === Features === */
.ab-features-bg {
  background: #1C1917;
  color: #FAFAF9;
}

.ab-features-bg .ab-section-title { color: #FAFAF9; }

.ab-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.ab-feature {
  padding: 28px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  transition: background 0.3s;
}
.ab-feature:hover {
  background: rgba(255,255,255,0.1);
}

.ab-feature-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: #D97706;
  font-weight: 500;
}

.ab-feature h3 {
  font-size: 17px;
  margin: 8px 0;
}

.ab-feature p {
  font-size: 14px;
  color: #A8A29E;
  line-height: 1.6;
}

/* === Pipeline Loop (3D Closed-Loop) === */
.ab-loop-wrap {
  perspective: 900px;
  margin: 48px auto 0;
  max-width: 780px;
}

.ab-loop {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  grid-template-rows: auto auto auto auto;
  gap: 0;
  align-items: center;
  transform: rotateX(10deg);
  transform-style: preserve-3d;
  position: relative;
}

/* Cards */
.ab-lp-card {
  background: #fff;
  border: 1px solid #E7E5E4;
  border-radius: 14px;
  padding: 24px 16px 20px;
  text-align: center;
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  opacity: 0;
  transform: scale(0.85) translateY(10px);
  position: relative;
  z-index: 2;
}

.ab-lp-card.active {
  opacity: 1;
  transform: scale(1) translateY(0);
  box-shadow: 0 8px 32px rgba(28, 25, 23, 0.08);
}

.ab-lp-card.glow {
  border-color: #D97706;
  box-shadow: 0 0 20px rgba(217, 119, 6, 0.15), 0 8px 32px rgba(28, 25, 23, 0.08);
}

.ab-lp-icon {
  display: block;
  font-size: 32px;
  margin-bottom: 10px;
  line-height: 1;
}

.ab-lp-card h4 {
  font-size: 15px;
  font-weight: 700;
  color: #1C1917;
  margin-bottom: 6px;
}

.ab-lp-card p {
  font-size: 12px;
  color: #78716C;
  line-height: 1.5;
}

/* Arrows (horizontal) */
.ab-lp-arrow {
  font-size: 20px;
  color: #D6D3D1;
  text-align: center;
  padding: 0 6px;
  transition: all 0.4s;
  opacity: 0;
}

.ab-lp-arrow.active {
  opacity: 1;
}

.ab-lp-arrow.glow {
  color: #D97706;
  text-shadow: 0 0 8px rgba(217, 119, 6, 0.4);
}

/* Turn arrows (vertical connectors) */
.ab-lp-turn {
  font-size: 20px;
  color: #D6D3D1;
  text-align: center;
  padding: 8px 0;
  transition: all 0.4s;
  opacity: 0;
}

.ab-lp-turn.right {
  grid-column: 5;
  grid-row: 2;
}

.ab-lp-turn.left {
  grid-column: 1;
  grid-row: 4;
}

.ab-lp-turn.active {
  opacity: 1;
}

.ab-lp-turn.glow {
  color: #D97706;
  text-shadow: 0 0 8px rgba(217, 119, 6, 0.4);
}

/* Bottom row placement */
.ab-lp-card.bottom { grid-row: 3; }
.ab-lp-arrow.bottom { grid-row: 3; }

/* Looping glow animation on the track */
@keyframes lp-glow-pulse {
  0%, 100% { box-shadow: 0 0 20px rgba(217, 119, 6, 0.15), 0 8px 32px rgba(28, 25, 23, 0.08); }
  50% { box-shadow: 0 0 28px rgba(217, 119, 6, 0.25), 0 8px 32px rgba(28, 25, 23, 0.1); }
}

.ab-lp-card.glow {
  animation: lp-glow-pulse 2s ease-in-out infinite;
}



/* === Roadmap === */
.ab-roadmap-bg {
  background: linear-gradient(180deg, #FAFAF9, #F5F5F4);
}

.ab-roadmap {
  max-width: 560px;
  margin: 40px auto 0;
  position: relative;
  padding-left: 32px;
}

.ab-roadmap::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: #D6D3D1;
}

.ab-roadmap-item {
  position: relative;
  margin-bottom: 32px;
}

.ab-roadmap-dot {
  position: absolute;
  left: -32px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #D97706;
  border: 3px solid #FAFAF9;
  box-shadow: 0 0 0 2px #D97706;
}

.ab-roadmap-content {
  background: #fff;
  border: 1px solid #E7E5E4;
  border-radius: 12px;
  padding: 20px 24px;
}

.ab-roadmap-badge {
  display: inline-block;
  padding: 2px 10px;
  background: #FEF3C7;
  color: #92400E;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
  font-family: 'JetBrains Mono', monospace;
  margin-bottom: 8px;
}

.ab-roadmap-content h4 {
  font-size: 16px;
  margin-bottom: 6px;
}

.ab-roadmap-content p {
  font-size: 14px;
  color: #78716C;
  line-height: 1.6;
}

/* === Community (Premium Dark Card) === */
.ab-comm {
  display: flex;
  align-items: center;
  gap: 48px;
  background: linear-gradient(135deg, #1C1917 0%, #292524 50%, #1C1917 100%);
  border-radius: 24px;
  padding: 56px 48px;
  color: #FAFAF9;
  position: relative;
  overflow: hidden;
}

.ab-comm::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(217, 119, 6, 0.12), transparent 70%);
  pointer-events: none;
}

.ab-comm-left {
  flex: 1;
}

.ab-comm-badge {
  display: inline-block;
  background: linear-gradient(135deg, #D97706, #F59E0B);
  color: #1C1917;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.ab-comm h2 {
  font-family: 'Playfair Display', serif;
  font-size: 30px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #FAFAF9, #D6D3D1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.ab-comm-tagline {
  font-size: 16px;
  color: #A8A29E;
  margin-bottom: 24px;
  line-height: 1.5;
}

.ab-comm-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.ab-comm-tags span {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #E7E5E4;
  font-size: 13px;
  padding: 6px 14px;
  border-radius: 20px;
  transition: all 0.3s;
}

.ab-comm-tags span:hover {
  background: rgba(217, 119, 6, 0.15);
  border-color: rgba(217, 119, 6, 0.3);
  color: #F59E0B;
}

.ab-comm-sub {
  font-size: 13px;
  color: #78716C;
  letter-spacing: 2px;
}

/* QR Code Right Side */
.ab-comm-right {
  flex-shrink: 0;
  text-align: center;
}

.ab-comm-qr-glow {
  position: relative;
  display: inline-block;
  padding: 4px;
  border-radius: 16px;
  background: linear-gradient(135deg, #D97706, #F59E0B, #D97706);
  background-size: 200% 200%;
  animation: qr-border-glow 3s ease-in-out infinite;
}

@keyframes qr-border-glow {
  0%, 100% { background-position: 0% 50%; box-shadow: 0 0 20px rgba(217, 119, 6, 0.3); }
  50% { background-position: 100% 50%; box-shadow: 0 0 40px rgba(245, 158, 11, 0.4); }
}

.ab-comm-qr {
  display: block;
  width: 180px;
  height: 180px;
  object-fit: cover;
  border-radius: 12px;
  background: #fff;
  padding: 8px;
}

.ab-comm-scan {
  margin-top: 12px;
  font-size: 13px;
  color: #A8A29E;
  letter-spacing: 0.5px;
}

/* === CTA === */
.ab-cta {
  padding: 64px 0;
  background: transparent;
  text-align: center;
  border-top: 1px solid #E7E5E4;
}

.ab-cta h2 {
  font-family: 'Playfair Display', serif;
  font-size: 28px;
  margin-bottom: 8px;
  color: #1C1917;
}

.ab-cta p {
  color: #78716C;
  margin-bottom: 28px;
  font-size: 15px;
}

.ab-cta-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.ab-cta .ab-btn-outline {
  border-color: #D6D3D1;
  color: #44403C;
  background: #fff;
}
.ab-cta .ab-btn-outline:hover {
  border-color: #D97706;
  color: #D97706;
}

/* === Footer === */
.ab-footer {
  padding: 32px 24px;
  text-align: center;
  border-top: 1px solid #E7E5E4;
}

.ab-footer p {
  font-size: 13px;
  color: #A8A29E;
  margin-bottom: 8px;
}

.ab-footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
}

.ab-footer-links a {
  font-size: 13px;
  color: #78716C;
  text-decoration: none;
}
.ab-footer-links a:hover { color: #1C1917; }

/* === Animations === */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* === Responsive === */
@media (max-width: 768px) {
  .ab-hero-title { font-size: 36px; }
  .ab-hero { padding: 120px 20px 60px; }
  .ab-section { padding: 60px 0; }
  .ab-what-grid { grid-template-columns: 1fr; }
  .ab-features { grid-template-columns: 1fr; }
  .ab-community { padding: 32px 20px; }
  .ab-comm { flex-direction: column; text-align: center; padding: 36px 24px; gap: 32px; }
  .ab-comm-tags { justify-content: center; }
  .ab-comm h2 { font-size: 24px; }
  .ab-section-title { font-size: 26px; }
  .ab-loop { transform: rotateX(6deg); }
  .ab-lp-card { padding: 16px 10px 14px; }
  .ab-lp-card h4 { font-size: 13px; }
  .ab-lp-card p { font-size: 11px; }
  .ab-lp-icon { font-size: 24px; }
  .ab-lp-arrow, .ab-lp-turn { font-size: 16px; }
}

@media (max-width: 480px) {
  .ab-hero-title { font-size: 28px; }
  .ab-hero-desc { font-size: 15px; }
}