:root {
  --bg-dark: #070a13;
  --bg-card: #0f1628;
  --bg-card-hover: #17223c;
  --primary-shopee: #ee4d2d;
  --primary-shopee-hover: #d73211;
  --accent-cyan: #00f0ff;
  --accent-green: #10b981;
  --accent-purple: #a855f7;
  --accent-amber: #fbbf24;
  --text-main: #f9fafb;
  --text-muted: #94a3b8;
  --border-color: rgba(255, 255, 255, 0.1);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --font-family: 'Plus Jakarta Sans', 'Noto Sans TC', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font-family);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  background-image: radial-gradient(circle at 50% 0%, rgba(30, 58, 138, 0.25) 0%, transparent 60%);
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 60px 0; }

.announcement-bar {
  background: linear-gradient(90deg, #b91c1c, #ee4d2d, #b91c1c);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  text-align: center;
  padding: 8px 15px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 15px;
  flex-wrap: wrap;
}

.countdown-box {
  background: rgba(0,0,0,0.3);
  padding: 2px 8px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 0.95rem;
  color: #fef08a;
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 10, 19, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand-logo {
  font-size: 1.4rem;
  font-weight: 900;
  color: #fff;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-badge {
  background: var(--primary-shopee);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 4px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 25px;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--accent-cyan); }

.btn-nav-buy {
  background: var(--primary-shopee);
  color: #fff;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-weight: 800;
  font-size: 0.88rem;
  text-decoration: none;
  transition: all 0.2s;
  box-shadow: 0 4px 12px rgba(238, 77, 45, 0.35);
}

.btn-nav-buy:hover {
  background: var(--primary-shopee-hover);
  transform: translateY(-2px);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.hero-gallery { position: relative; }

.gallery-main {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 20px 40px rgba(0,0,0,0.5);
}

.gallery-main img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.2s ease;
}

.gallery-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid var(--accent-cyan);
  color: var(--accent-cyan);
  font-size: 0.8rem;
  font-weight: 800;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 6px;
  z-index: 5;
}

.gallery-thumbs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 14px;
}

.thumb-item {
  background: var(--bg-card);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 16 / 10;
  transition: all 0.2s;
}

.thumb-item.active { border-color: var(--accent-cyan); }
.thumb-item img { width: 100%; height: 100%; object-fit: cover; }

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.store-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.badge-shopee {
  background: rgba(238, 77, 45, 0.15);
  border: 1px solid var(--primary-shopee);
  color: #ff7355;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: 4px;
}

.product-title {
  font-size: 1.85rem;
  font-weight: 900;
  line-height: 1.35;
  letter-spacing: -0.5px;
}

.rating-row {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
}

.stars { color: #f59e0b; font-size: 1.05rem; }
.sales-count { color: var(--text-muted); }

.price-card {
  background: rgba(238, 77, 45, 0.08);
  border: 1px solid rgba(238, 77, 45, 0.25);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.current-price {
  font-size: 2.2rem;
  font-weight: 900;
  color: #ff5722;
}

.original-price {
  font-size: 1.15rem;
  color: var(--text-muted);
  text-decoration: line-through;
}

.discount-badge {
  background: #ff5722;
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: 4px;
}

.coupons-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.coupon-tag {
  background: rgba(251, 191, 36, 0.15);
  border: 1px dashed #fbbf24;
  color: #fde68a;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
}

.variant-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.variant-options {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.variant-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}

.variant-btn.active {
  border-color: var(--accent-cyan);
  background: rgba(0, 240, 255, 0.1);
  color: var(--accent-cyan);
}

.bullet-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 16px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  font-size: 0.88rem;
}

.bullet-item { display: flex; align-items: center; gap: 8px; }
.bullet-icon { color: var(--accent-green); font-weight: bold; }

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 6px;
}

.btn-primary-shopee {
  flex: 2;
  background: linear-gradient(135deg, #ff5722, #ee4d2d);
  color: #fff;
  padding: 14px 22px;
  border-radius: var(--radius-md);
  font-size: 1.08rem;
  font-weight: 800;
  text-decoration: none;
  text-align: center;
  box-shadow: 0 8px 24px rgba(238, 77, 45, 0.45);
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-primary-shopee:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(238, 77, 45, 0.6);
}

.btn-secondary-demo {
  flex: 1;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 14px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  text-align: center;
  transition: all 0.2s;
}

.btn-secondary-demo:hover {
  background: rgba(255,255,255,0.12);
  border-color: var(--accent-cyan);
}

.guarantee-row {
  display: flex;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.tag-pill {
  display: inline-block;
  background: rgba(0, 240, 255, 0.12);
  border: 1px solid var(--accent-cyan);
  color: var(--accent-cyan);
  font-size: 0.8rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 10px;
}

.section-title { font-size: 1.9rem; font-weight: 900; }
.section-desc { color: var(--text-muted); font-size: 0.95rem; margin-top: 6px; }

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 22px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 26px;
  transition: all 0.3s;
}

.feature-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-4px);
}

.feature-icon-box { font-size: 2rem; margin-bottom: 12px; }
.feature-title { font-size: 1.2rem; font-weight: 800; margin-bottom: 8px; }
.feature-desc { color: var(--text-muted); font-size: 0.9rem; line-height: 1.6; }

.comparison-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.comparison-table th, .comparison-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.92rem;
}

.highlight-cell {
  background: rgba(0, 240, 255, 0.05);
  color: var(--accent-cyan);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-body { color: #e2e8f0; font-size: 0.92rem; line-height: 1.6; }
.review-user { display: flex; align-items: center; gap: 12px; margin-top: 18px; }
.avatar-circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent-cyan);
  color: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
}

.user-name { font-size: 0.9rem; font-weight: 700; }
.user-verified { font-size: 0.75rem; color: #34d399; }

.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 18px 22px;
  background: transparent;
  border: none;
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  padding: 0 22px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding-bottom: 18px;
}

.footer {
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
  text-align: center;
  margin-top: 40px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  list-style: none;
  margin-bottom: 15px;
  flex-wrap: wrap;
}

.footer-links a { color: var(--text-muted); text-decoration: none; font-size: 0.88rem; }
.footer-links a:hover { color: #fff; }

.sticky-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(7, 10, 19, 0.95);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-color);
  padding: 12px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 99;
  transform: translateY(100%);
  transition: transform 0.3s ease;
}

.sticky-bar.show { transform: translateY(0); }
.sticky-title { font-size: 0.95rem; font-weight: 800; display: block; }
.sticky-price { font-size: 1.1rem; font-weight: 900; color: #ff5722; }

@media (max-width: 768px) {
  .hero-grid { grid-template-columns: 1fr; }
  .bullet-list { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}