:root {
  --primary: #0b1220;
  --surface: #111a2e;
  --accent: #38bdf8;
  --accent-2: #818cf8;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --border: rgba(255,255,255,0.08);
  --glass-bg: rgba(255,255,255,0.05);
  --glass-border: rgba(255,255,255,0.1);
  --radius: 18px;
  --shadow: 0 8px 32px rgba(0,0,0,0.35);
  --shadow-glow: 0 0 24px rgba(56,189,248,0.3);
  --transition: all 0.3s ease;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  background: var(--primary);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a {
  text-decoration: none;
  color: inherit;
}
img {
  max-width: 100%;
  display: block;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section-pad {
  padding: 88px 0;
}
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  transition: var(--transition);
}
.glass-card:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.16);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.btn-glow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);
  color: #fff;
  font-weight: 600;
  padding: 14px 32px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(56,189,248,0.3);
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 15px;
}
.btn-glow:hover {
  box-shadow: 0 6px 32px rgba(56,189,248,0.5);
  transform: translateY(-2px);
  color: #fff;
}
.btn-glow:active {
  transform: translateY(0);
  box-shadow: 0 2px 12px rgba(56,189,248,0.3);
}
.btn-glow:focus-visible {
  outline: 2px solid #38bdf8;
  outline-offset: 3px;
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  color: var(--text);
  font-weight: 500;
  padding: 13px 30px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.2);
  transition: var(--transition);
  cursor: pointer;
  font-size: 15px;
}
.btn-outline:hover {
  border-color: rgba(56,189,248,0.5);
  color: var(--accent);
  background: rgba(56,189,248,0.08);
}
.flash-bar {
  background: linear-gradient(90deg, rgba(56,189,248,0.12), rgba(129,140,248,0.12));
  border-bottom: 1px solid rgba(56,189,248,0.15);
  padding: 10px 0;
}
.badge-tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  background: rgba(56,189,248,0.12);
  color: #7dd3fc;
  border: 1px solid rgba(56,189,248,0.2);
}
.badge-hot {
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  color: #fff;
  border: none;
  box-shadow: 0 2px 10px rgba(239,68,68,0.3);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.4;
  z-index: -1;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11,18,32,0.85) 0%, rgba(11,18,32,0.6) 50%, rgba(11,18,32,0.95) 100%);
}
.countdown-box {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0,0,0,0.3);
  border-radius: 10px;
  padding: 4px 12px;
  font-family: 'Menlo', 'Courier New', monospace;
  font-size: 18px;
  font-weight: 700;
  color: #fbbf24;
  border: 1px solid rgba(251,191,36,0.2);
}
.countdown-box span {
  min-width: 28px;
  text-align: center;
}
.step-line {
  position: relative;
}
.step-line::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 16px;
  right: 16px;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(56,189,248,0.3), transparent);
}
.faq-item {
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  background: rgba(255,255,255,0.03);
  transition: var(--transition);
  overflow: hidden;
}
.faq-item:hover {
  border-color: rgba(56,189,248,0.3);
  background: rgba(255,255,255,0.05);
}
.faq-question {
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 500;
}
.faq-question .fa-chevron-down {
  transition: transform 0.3s;
}
.faq-item.open .fa-chevron-down {
  transform: rotate(180deg);
}
.faq-answer {
  max-height: 0;
  padding: 0 24px;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.8;
}
.faq-item.open .faq-answer {
  max-height: 400px;
  padding-bottom: 20px;
}
.star-rating {
  color: #f59e0b;
  font-size: 14px;
  letter-spacing: 2px;
}
.mobile-tab {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(17,26,46,0.95);
  backdrop-filter: blur(20px);
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  justify-content: space-around;
  padding: 8px 8px 10px;
  z-index: 9999;
  display: none;
}
.mobile-tab .tab-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  font-size: 11px;
  color: var(--text-muted);
  transition: var(--transition);
  padding: 4px 12px;
  border-radius: 12px;
}
.mobile-tab .tab-item i {
  font-size: 20px;
}
.mobile-tab .tab-item:hover,
.mobile-tab .tab-item.active {
  color: var(--accent);
  background: rgba(56,189,248,0.08);
}
.desktop-nav {
  position: sticky;
  top: 0;
  background: rgba(11,18,32,0.85);
  backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
}
.footer-link {
  color: var(--text-muted);
  transition: var(--transition);
  font-size: 14px;
}
.footer-link:hover {
  color: var(--accent);
}
.news-list li {
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  transition: var(--transition);
}
.news-list li:hover {
  padding-left: 8px;
  border-bottom-color: rgba(56,189,248,0.2);
}
.news-list li a {
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.news-list .news-date {
  font-size: 12px;
  color: var(--text-muted);
  flex-shrink: 0;
  font-family: monospace;
}
.news-list .news-title {
  color: var(--text);
  font-weight: 500;
  transition: var(--transition);
}
.news-list li:hover .news-title {
  color: var(--accent);
}
.product-card {
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  transition: var(--transition);
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 80px rgba(56,189,248,0.15);
  border-color: rgba(56,189,248,0.3);
}
.price-tag {
  font-size: 32px;
  font-weight: 800;
  color: #fbbf24;
  line-height: 1.2;
}
.package-card {
  position: relative;
  overflow: hidden;
}
.package-card .popular {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 10;
}
.cta-bg {
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  position: relative;
}
.cta-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11,18,32,0.92), rgba(17,26,46,0.85));
}
.back-3-bg {
  background-image: url('/assets/images/backpic/back-3.webp');
  background-size: cover;
  background-position: center;
}
@media (max-width: 1024px) {
  .section-pad {
    padding: 64px 0;
  }
  .step-line::before {
    display: none;
  }
}
@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }
  .section-pad {
    padding: 48px 0;
  }
  .desktop-nav {
    display: none;
  }
  .mobile-tab {
    display: flex;
  }
  body {
    padding-bottom: 64px;
  }
  .product-card .price-tag {
    font-size: 26px;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .btn-glow, .btn-outline {
    width: 100%;
  }
  .flash-bar .flash-text {
    font-size: 12px;
  }
  .countdown-box {
    font-size: 14px;
  }
}