/* ============================================================
   HHPoker 德扑圈 - 高端SaaS风格落地页
   主色调: Indigo (#6366f1)
   ============================================================ */

/* --- CSS Variables --- */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --primary-bg: #eef2ff;
  --dark-bg: #111827;
  --dark-bg2: #1f2937;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --white: #ffffff;
  --font-stack: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: all 0.3s ease;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-stack);
  color: var(--gray-800);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul {
  list-style: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Navbar --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
  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);
  padding: 10px 0;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 700;
  color: #ffffff;
  transition: var(--transition);
}

.navbar.scrolled .navbar-logo {
  color: var(--gray-800);
}

.navbar-logo i {
  font-size: 1.6rem;
  color: var(--primary-light);
}

.navbar.scrolled .navbar-logo i {
  color: var(--primary);
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.navbar-links a {
  font-size: 0.925rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  position: relative;
  padding: 4px 0;
}

.navbar.scrolled .navbar-links a {
  color: var(--gray-600);
}

.navbar-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-light);
  transition: width 0.3s ease;
}

.navbar.scrolled .navbar-links a::after {
  background: var(--primary);
}

.navbar-links a:hover::after {
  width: 100%;
}

.navbar-links a:hover {
  color: #ffffff;
}

.navbar.scrolled .navbar-links a:hover {
  color: var(--primary);
}

.navbar-cta {
  display: inline-block;
  background: var(--primary);
  color: #ffffff !important;
  padding: 10px 22px !important;
  border-radius: 50px;
  font-weight: 600 !important;
  transition: var(--transition);
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.navbar-cta:hover {
  background: var(--primary-dark) !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.55);
}

.navbar-cta::after {
  display: none !important;
}

/* Hamburger Button */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  cursor: pointer;
  z-index: 1001;
  background: none;
  border: none;
  gap: 5px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: #ffffff;
  border-radius: 3px;
  transition: var(--transition);
}

.navbar.scrolled .hamburger span {
  background: var(--gray-800);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 280px;
  height: 100vh;
  background: #ffffff;
  z-index: 999;
  padding: 100px 32px 40px;
  transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-2xl);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mobile-menu.open {
  right: 0;
}

.mobile-menu a {
  display: block;
  padding: 12px 16px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--gray-700);
  border-radius: 12px;
  transition: var(--transition);
}

.mobile-menu a:hover {
  background: var(--primary-bg);
  color: var(--primary);
}

.mobile-menu .mobile-cta {
  margin-top: 16px;
  background: var(--primary);
  color: #ffffff !important;
  text-align: center;
  border-radius: 50px;
  font-weight: 600;
  padding: 14px 24px !important;
}

.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.mobile-menu-overlay.show {
  opacity: 1;
  visibility: visible;
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #312e81 0%, #4338ca 30%, #6366f1 60%, #818cf8 100%);
  overflow: hidden;
  padding-top: 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.05) 0%, transparent 70%);
  border-radius: 50%;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-content {
  color: #ffffff;
}

.hero-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 24px;
  letter-spacing: 0.5px;
  backdrop-filter: blur(10px);
}

.hero-badge i {
  margin-right: 6px;
  color: #fbbf24;
}

.hero-content h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-content h1 .highlight {
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 480px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-align: center;
}

.btn-primary {
  background: #ffffff;
  color: var(--primary);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.22);
}

.btn-outline {
  background: transparent;
  color: #ffffff;
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #ffffff;
  transform: translateY(-3px);
}

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image .img-wrapper {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
  border: 4px solid rgba(255, 255, 255, 0.2);
  transition: var(--transition);
}

.hero-image .img-wrapper:hover {
  transform: translateY(-6px);
  box-shadow: 0 36px 72px rgba(0, 0, 0, 0.4);
}

.hero-image .img-wrapper img {
  border-radius: calc(var(--radius-xl) - 4px);
  width: 100%;
}

.hero-floating-badge {
  position: absolute;
  bottom: -18px;
  right: -18px;
  background: #ffffff;
  color: var(--gray-800);
  padding: 12px 20px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 0.9rem;
}

.hero-floating-badge i {
  color: #10b981;
  font-size: 1.2rem;
}

/* Hero Wave */
.hero-wave {
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  z-index: 1;
}

.hero-wave svg {
  display: block;
  width: 100%;
  height: auto;
}

/* --- Section Common --- */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header .section-label {
  display: inline-block;
  background: var(--primary-bg);
  color: var(--primary);
  padding: 6px 18px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.section-header h2 {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 12px;
}

.section-header p {
  font-size: 1.05rem;
  color: var(--gray-500);
  max-width: 600px;
  margin: 0 auto;
}

/* --- Features Section --- */
.features-section {
  background: var(--gray-50);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: #ffffff;
  border-radius: var(--radius-xl);
  padding: 36px 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-100);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-light);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
  transition: var(--transition);
}

.feature-card:hover .feature-icon {
  transform: scale(1.1);
}

.feature-icon.blue {
  background: linear-gradient(135deg, #dbeafe, #bfdbfe);
  color: #2563eb;
}

.feature-icon.indigo {
  background: linear-gradient(135deg, #e0e7ff, #c7d2fe);
  color: #4f46e5;
}

.feature-icon.green {
  background: linear-gradient(135deg, #d1fae5, #a7f3d0);
  color: #059669;
}

.feature-icon.orange {
  background: linear-gradient(135deg, #ffedd5, #fed7aa);
  color: #ea580c;
}

.feature-icon.purple {
  background: linear-gradient(135deg, #f3e8ff, #e9d5ff);
  color: #7c3aed;
}

.feature-icon.rose {
  background: linear-gradient(135deg, #ffe4e6, #fecdd3);
  color: #e11d48;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.925rem;
  color: var(--gray-500);
  line-height: 1.7;
}

/* --- Stats Section --- */
.stats-section {
  background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #4338ca 100%);
  position: relative;
  overflow: hidden;
}

.stats-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  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");
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  position: relative;
  z-index: 2;
}

.stat-item {
  text-align: center;
  color: #ffffff;
  padding: 20px;
}

.stat-icon {
  font-size: 2rem;
  margin-bottom: 12px;
  opacity: 0.8;
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 8px;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
}

.stat-number .suffix {
  font-size: 1.5rem;
  font-weight: 600;
  opacity: 0.8;
}

.stat-label {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.7);
  font-weight: 500;
}

/* --- Testimonials --- */
.testimonials-section {
  background: #ffffff;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.testimonial-card {
  background: var(--gray-50);
  border-radius: var(--radius-xl);
  padding: 32px;
  border: 1px solid var(--gray-100);
  transition: var(--transition);
}

.testimonial-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--gray-200);
  transform: translateY(-4px);
}

.testimonial-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.testimonial-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--primary-light);
  flex-shrink: 0;
}

.testimonial-info h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: 4px;
}

.testimonial-stars {
  color: #f59e0b;
  font-size: 0.85rem;
  letter-spacing: 1px;
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--gray-600);
  line-height: 1.7;
  font-style: italic;
  position: relative;
  padding-left: 16px;
  border-left: 3px solid var(--primary-light);
}

/* --- FAQ Section --- */
.faq-section {
  background: var(--gray-50);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-100);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  box-shadow: var(--shadow-md);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-800);
  text-align: left;
  font-family: var(--font-stack);
  transition: var(--transition);
  gap: 16px;
}

.faq-question:hover {
  color: var(--primary);
}

.faq-item.active .faq-question {
  color: var(--primary);
}

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition);
  font-size: 0.8rem;
  color: var(--gray-500);
}

.faq-item.active .faq-icon {
  background: var(--primary-bg);
  color: var(--primary);
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
}

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

.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 0.95rem;
  color: var(--gray-600);
  line-height: 1.8;
}

/* --- Download Section --- */
.download-section {
  background: #ffffff;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.download-card {
  text-align: center;
  background: var(--gray-50);
  border-radius: var(--radius-xl);
  padding: 40px 24px;
  border: 2px solid transparent;
  transition: var(--transition);
  position: relative;
}

.download-card:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-xl);
  transform: translateY(-8px);
  background: #ffffff;
}

.download-card.featured {
  border-color: var(--primary);
  background: #ffffff;
  box-shadow: var(--shadow-lg);
}

.download-card.featured::before {
  content: '推荐';
  position: absolute;
  top: 14px;
  right: 14px;
  background: var(--primary);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 50px;
}

.download-platform-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  margin: 0 auto 20px;
  transition: var(--transition);
}

.download-card:hover .download-platform-icon {
  transform: scale(1.1);
}

.download-platform-icon.ios {
  background: linear-gradient(135deg, #e0e7ff, #c7d2fe);
  color: #4f46e5;
}

.download-platform-icon.android {
  background: linear-gradient(135deg, #d1fae5, #a7f3d0);
  color: #059669;
}

.download-platform-icon.pc {
  background: linear-gradient(135deg, #dbeafe, #bfdbfe);
  color: #2563eb;
}

.download-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: 6px;
}

.download-version {
  font-size: 0.85rem;
  color: var(--gray-400);
  margin-bottom: 20px;
}

.download-btn {
  display: inline-block;
  background: var(--primary);
  color: #ffffff;
  padding: 12px 30px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.download-btn:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.5);
}

/* --- CTA Section --- */
.cta-section {
  background: linear-gradient(135deg, #312e81 0%, #4338ca 40%, #6366f1 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.06) 0%, transparent 70%);
  border-radius: 50%;
}

.cta-section .container {
  position: relative;
  z-index: 2;
}

.cta-section h2 {
  font-size: 2.4rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.75);
  max-width: 600px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 44px;
  background: #ffffff;
  color: var(--primary);
  font-size: 1.1rem;
  font-weight: 700;
  border-radius: 50px;
  transition: var(--transition);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.cta-btn:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
  background: #f8fafc;
}

.cta-btn i {
  font-size: 1rem;
  transition: var(--transition);
}

.cta-btn:hover i {
  transform: translateX(4px);
}

/* --- Footer --- */
.footer {
  background: var(--gray-900);
  color: #ffffff;
  padding: 72px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-brand .footer-logo i {
  color: var(--primary-light);
  font-size: 1.5rem;
}

.footer-brand p {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--primary);
  color: #ffffff;
  transform: translateY(-2px);
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: #ffffff;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul li a {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.55);
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: var(--primary-light);
  padding-left: 6px;
}

.footer-bottom {
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom-links {
  display: flex;
  gap: 20px;
}

.footer-bottom-links a {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom-links a:hover {
  color: var(--primary-light);
}

/* --- Back to Top Button --- */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  cursor: pointer;
  z-index: 900;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition);
  box-shadow: var(--shadow-lg);
  border: none;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive Styles --- */

/* Tablet (≤1024px) */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }

  .hero-content p {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-image {
    order: -1;
  }

  .hero-image .img-wrapper {
    max-width: 450px;
  }

  .hero-content h1 {
    font-size: 2.4rem;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
  }

  .download-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

  .hamburger {
    display: flex;
  }

  .section {
    padding: 64px 0;
  }

  .section-header h2 {
    font-size: 1.7rem;
  }

  .hero {
    min-height: auto;
    padding: 120px 0 80px;
  }

  .hero-content h1 {
    font-size: 1.9rem;
  }

  .hero-content p {
    font-size: 0.95rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    justify-content: center;
    max-width: 300px;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .stat-number {
    font-size: 2.2rem;
  }

  .stat-number .suffix {
    font-size: 1.2rem;
  }

  .download-grid {
    grid-template-columns: 1fr;
    max-width: 360px;
    margin: 0 auto;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .cta-section h2 {
    font-size: 1.7rem;
  }

  .testimonial-card {
    padding: 24px;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
    font-size: 1rem;
  }
}

/* Small Mobile (≤480px) */
@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-content h1 {
    font-size: 1.6rem;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .stat-number {
    font-size: 1.8rem;
  }

  .section-header h2 {
    font-size: 1.5rem;
  }
}