/* ============================================================
   HHPoker - Premium Landing Page Shared Stylesheet
   ============================================================ */

/* --- CSS Variables (Design Tokens) --- */
:root {
  --color-primary: #4f46e5;
  --color-primary-dark: #4338ca;
  --color-primary-light: #6366f1;
  --color-primary-50: #eef2ff;
  --color-primary-100: #e0e7ff;
  --color-primary-600: #4f46e5;
  --color-primary-700: #4338ca;
  --color-accent: #f59e0b;
  --color-dark: #0f172a;
  --color-text: #334155;
  --color-text-light: #64748b;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-border: #e2e8f0;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-2xl: 1.5rem;
  --radius-3xl: 2rem;
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

/* --- Body --- */
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Navbar Styles --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: all var(--transition-base);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-md);
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
  padding: 0.625rem 0;
}

.navbar .logo-text {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary) 0%, #7c3aed 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.navbar .nav-link {
  position: relative;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition-fast);
  padding: 0.375rem 0;
}

.navbar .nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 9999px;
  transition: width var(--transition-base);
}

.navbar .nav-link:hover {
  color: var(--color-primary);
}

.navbar .nav-link:hover::after {
  width: 100%;
}

.navbar .nav-link.active {
  color: var(--color-primary);
}

.navbar .nav-link.active::after {
  width: 100%;
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.mobile-menu.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu .mobile-link {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-dark);
  transition: color var(--transition-fast);
}

.mobile-menu .mobile-link:hover,
.mobile-menu .mobile-link.active {
  color: var(--color-primary);
}

/* Hamburger Button */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-dark);
  border-radius: 9999px;
  transition: all var(--transition-base);
}

.hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.open span:nth-child(2) {
  opacity: 0;
}

.hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- Button Styles --- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  font-weight: 600;
  font-size: 1rem;
  color: #ffffff;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--radius-xl);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(79, 70, 229, 0.45);
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-primary);
  background: var(--color-primary-50);
  border: 1.5px solid var(--color-primary-100);
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

.btn-secondary:hover {
  background: var(--color-primary-100);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary:active {
  transform: translateY(0);
}

.btn-white {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-primary);
  background: #ffffff;
  border: none;
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-lg);
  text-decoration: none;
  white-space: nowrap;
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2xl);
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.125rem;
  border-radius: var(--radius-2xl);
}

/* --- Hero Section --- */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(180deg, #f8fafc 0%, #eef2ff 50%, #ffffff 100%);
  overflow: hidden;
  padding-top: 5rem;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-section::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-heading {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--color-dark);
}

.hero-heading .highlight {
  background: linear-gradient(135deg, var(--color-primary) 0%, #7c3aed 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  color: var(--color-text-light);
  line-height: 1.7;
  max-width: 540px;
}

/* --- Feature Cards --- */
.feature-card {
  position: relative;
  background: #ffffff;
  border-radius: var(--radius-2xl);
  padding: 2.5rem 2rem;
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), #7c3aed);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  background: var(--color-primary-50);
  color: var(--color-primary);
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
  transition: all var(--transition-base);
}

.feature-card:hover .feature-icon {
  background: var(--color-primary);
  color: #ffffff;
  transform: scale(1.1);
}

/* --- Stats Section --- */
.stats-section {
  background: linear-gradient(135deg, var(--color-dark) 0%, #1e1b4b 100%);
  position: relative;
  overflow: hidden;
}

.stats-section::before {
  content: '';
  position: absolute;
  inset: 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;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.65);
  margin-top: 0.25rem;
}

/* --- Testimonial Cards --- */
.testimonial-card {
  background: #ffffff;
  border-radius: var(--radius-2xl);
  padding: 2rem;
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  position: relative;
}

.testimonial-card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
  border-color: transparent;
}

.testimonial-card .quote-mark {
  position: absolute;
  top: 1.5rem;
  right: 2rem;
  font-size: 4rem;
  line-height: 1;
  color: var(--color-primary-100);
  font-family: Georgia, serif;
  pointer-events: none;
}

.stars {
  color: var(--color-accent);
  font-size: 0.875rem;
  letter-spacing: 2px;
}

/* --- FAQ Accordion --- */
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
  background: #ffffff;
}

.faq-item:hover {
  border-color: var(--color-primary-100);
}

.faq-item summary {
  padding: 1.5rem 2rem;
  font-weight: 600;
  font-size: 1.0625rem;
  color: var(--color-dark);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  user-select: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '\f107';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: 1rem;
  color: var(--color-text-light);
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

.faq-item[open] summary::after {
  transform: rotate(180deg);
  color: var(--color-primary);
}

.faq-item[open] summary {
  color: var(--color-primary);
}

.faq-item .faq-answer {
  padding: 0 2rem 1.5rem 2rem;
  color: var(--color-text-light);
  line-height: 1.75;
  font-size: 0.9375rem;
}

/* --- Download Card --- */
.download-card {
  background: #ffffff;
  border-radius: var(--radius-3xl);
  padding: 3rem 2.5rem;
  border: 1px solid var(--color-border);
  text-align: center;
  transition: all var(--transition-base);
  position: relative;
}

.download-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-2xl);
  border-color: transparent;
}

.download-card.recommended {
  border: 2px solid var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-50);
}

.download-card.recommended::before {
  content: '推荐';
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--color-primary), #7c3aed);
  color: white;
  font-size: 0.8125rem;
  font-weight: 700;
  padding: 0.375rem 1.5rem;
  border-radius: 9999px;
  white-space: nowrap;
}

/* --- Platform Badge --- */
.platform-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.platform-badge:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-50);
}

/* --- Benefit List --- */
.benefit-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 0;
}

.benefit-item .check-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  margin-top: 2px;
}

/* --- Club Card --- */
.club-card {
  background: #ffffff;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.club-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.club-card .club-card-image {
  height: 160px;
  background: linear-gradient(135deg, var(--color-primary-100), #e0e7ff);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--color-primary);
}

/* --- Page Hero (inner pages) --- */
.page-hero {
  background: linear-gradient(180deg, #f8fafc 0%, #eef2ff 100%);
  padding-top: 7rem;
  padding-bottom: 4rem;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -15%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

/* --- Step Number --- */
.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), #7c3aed);
  color: white;
  font-weight: 700;
  font-size: 1.25rem;
  flex-shrink: 0;
}

/* --- CTA Section --- */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, #7c3aed 50%, #5b21b6 100%);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='80' height='80' viewBox='0 0 80 80' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Ccircle cx='40' cy='40' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

/* --- Footer --- */
.site-footer {
  background: var(--color-dark);
  color: rgba(255, 255, 255, 0.7);
}

.site-footer a {
  color: rgba(255, 255, 255, 0.55);
  transition: color var(--transition-fast);
  text-decoration: none;
  font-size: 0.9375rem;
}

.site-footer a:hover {
  color: #ffffff;
}

.site-footer .footer-heading {
  color: #ffffff;
  font-weight: 600;
  font-size: 0.9375rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

/* --- Animation: Fade In Up --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease-out forwards;
  opacity: 0;
}

.animate-delay-100 { animation-delay: 100ms; }
.animate-delay-200 { animation-delay: 200ms; }
.animate-delay-300 { animation-delay: 300ms; }
.animate-delay-400 { animation-delay: 400ms; }
.animate-delay-500 { animation-delay: 500ms; }

/* --- Animation: Reveal on Scroll --- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Glow Pulse --- */
@keyframes glowPulse {
  0%, 100% {
    box-shadow: 0 0 20px rgba(79, 70, 229, 0.3);
  }
  50% {
    box-shadow: 0 0 40px rgba(79, 70, 229, 0.6);
  }
}

.glow-pulse {
  animation: glowPulse 3s ease-in-out infinite;
}
@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-12px);
  }
}

.float-animation {
  animation: float 4s ease-in-out infinite;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .navbar .nav-links {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .hero-section {
    min-height: auto;
    padding-top: 7rem;
    padding-bottom: 4rem;
  }

  .feature-card {
    padding: 1.75rem 1.5rem;
  }

  .stat-number {
    font-size: 2rem;
  }

  .download-card {
    padding: 2rem 1.5rem;
  }

  .faq-item summary {
    padding: 1.25rem 1.5rem;
    font-size: 1rem;
  }

  .faq-item .faq-answer {
    padding: 0 1.5rem 1.25rem 1.5rem;
  }
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 9999px;
}

::-webkit-scrollbar-thumb:hover {
  background: #94a3b8;
}