/* ============================================================
   HHPoker - Premium SaaS Landing Page Styles
   ============================================================ */

/* --- CSS Variables --- */
:root {
  --color-primary: #4f46e5;
  --color-primary-dark: #4338ca;
  --color-primary-light: #6366f1;
  --color-accent: #f59e0b;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Smooth Scroll --- */
html {
  scroll-behavior: smooth;
}

/* --- Selection --- */
::selection {
  background-color: var(--color-primary);
  color: #ffffff;
}

/* --- Glass Navbar --- */
.navbar-glass {
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  background-color: rgba(255, 255, 255, 0.82);
  border-bottom: 1px solid rgba(226, 232, 240, 0.5);
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
}
.navbar-glass.scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
}

/* --- Feature Card Hover --- */
.feature-card {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.feature-card:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 25px 50px -12px rgba(79, 70, 229, 0.18);
}

/* --- Testimonial Card --- */
.testimonial-card {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.12);
}

/* --- Star Rating --- */
.stars {
  color: var(--color-accent);
  letter-spacing: 2px;
}

/* --- FAQ Accordion --- */
.faq-details {
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}
.faq-details[open] {
  border-color: var(--color-primary-light);
  box-shadow: 0 4px 16px rgba(79, 70, 229, 0.08);
}
.faq-details summary {
  cursor: pointer;
  padding: 20px 24px;
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  user-select: none;
  transition: color var(--transition-base);
}
.faq-details summary::-webkit-details-marker {
  display: none;
}
.faq-details summary::after {
  content: '\f107';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  transition: transform var(--transition-base);
  flex-shrink: 0;
  margin-left: 12px;
}
.faq-details[open] summary {
  color: var(--color-primary);
}
.faq-details[open] summary::after {
  transform: rotate(180deg);
  color: var(--color-primary);
}
.faq-details .faq-body {
  padding: 0 24px 20px;
  color: var(--color-text-muted);
  line-height: 1.75;
}

/* --- CTA Gradient --- */
.cta-gradient {
  background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #a855f7 100%);
  position: relative;
  overflow: hidden;
}
.cta-gradient::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 70%, rgba(255, 255, 255, 0.08) 0%, transparent 50%);
  pointer-events: none;
}
.cta-gradient::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

/* --- Button --- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-weight: 600;
  font-size: 1rem;
  color: #ffffff;
  background: linear-gradient(135deg, #4f46e5, #6366f1);
  border-radius: 9999px;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
  text-decoration: none;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(79, 70, 229, 0.45);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-primary);
  background: rgba(79, 70, 229, 0.06);
  border: 1.5px solid rgba(79, 70, 229, 0.2);
  border-radius: 9999px;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}
.btn-secondary:hover {
  background: rgba(79, 70, 229, 0.1);
  border-color: rgba(79, 70, 229, 0.4);
  transform: translateY(-2px);
}

/* --- Hero Image Container --- */
.hero-img-wrap {
  position: relative;
}
.hero-img-wrap::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 24px;
  background: linear-gradient(135deg, #4f46e5, #a855f7, #6366f1);
  z-index: -1;
  opacity: 0.6;
  filter: blur(20px);
}

/* --- Stat Number Animation --- */
.stat-number {
  font-variant-numeric: tabular-nums;
}

/* --- Mobile Menu --- */
.mobile-menu {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.mobile-menu.open {
  max-height: 400px;
}

/* --- Download Cards --- */
.download-card {
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  border: 2px solid transparent;
}
.download-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px -12px rgba(79, 70, 229, 0.2);
  border-color: var(--color-primary-light);
}
.download-card.featured {
  border-color: var(--color-primary);
  position: relative;
}
.download-card.featured::before {
  content: '推荐';
  position: absolute;
  top: 12px;
  right: 12px;
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 9999px;
}

/* --- Club Cards --- */
.club-card {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.club-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.12);
}

/* --- Page Hero (inner pages) --- */
.page-hero {
  background: linear-gradient(135deg, #eef2ff 0%, #f5f3ff 50%, #faf5ff 100%);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.08), transparent 70%);
  pointer-events: none;
}

/* --- Step Number --- */
.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, #4f46e5, #6366f1);
  color: #fff;
  font-weight: 700;
  font-size: 1.25rem;
  flex-shrink: 0;
}

/* --- Benefit Icon Wrap --- */
.benefit-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, #eef2ff, #e0e7ff);
  color: var(--color-primary);
  font-size: 1.5rem;
}

/* --- Responsive Tweaks --- */
@media (max-width: 768px) {
  .hero-img-wrap::before {
    filter: blur(12px);
    inset: -2px;
  }
}