/* ========================================
   极悦直播 - 全局样式
   版本: 1.0
   ======================================== */

/* --- CSS Variables --- */
:root {
  --primary: #FF4D6D;
  --primary-dark: #E8304F;
  --primary-light: #FF7A93;
  --secondary: #7C3AED;
  --secondary-dark: #6025D1;
  --accent: #F59E0B;
  --dark: #0F0F1A;
  --dark-light: #1A1A2E;
  --gray-900: #111827;
  --gray-800: #1F2937;
  --gray-700: #374151;
  --gray-600: #4B5563;
  --gray-500: #6B7280;
  --gray-400: #9CA3AF;
  --gray-300: #D1D5DB;
  --gray-200: #E5E7EB;
  --gray-100: #F3F4F6;
  --gray-50: #F9FAFB;
  --white: #FFFFFF;
  --gradient: linear-gradient(135deg, var(--secondary), var(--primary));
  --gradient-light: linear-gradient(135deg, #7C3AED20, #FF4D6D20);
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
  --shadow-md: 0 10px 25px -5px rgba(0,0,0,0.1);
  --shadow-lg: 0 25px 50px -12px rgba(0,0,0,0.25);
  --shadow-glow: 0 0 40px rgba(255,77,109,0.3);
  --radius: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
ul, ol { list-style: none; }

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--gray-900);
}
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.5rem); }
p { color: var(--gray-600); line-height: 1.8; }

.section-label {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 0.75rem;
}

.section-title {
  margin-bottom: 1rem;
}

.section-desc {
  font-size: 1.125rem;
  max-width: 640px;
  margin: 0 auto 3rem;
}

.text-gradient {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-center { text-align: center; }

/* --- Container --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* --- Section --- */
.section {
  padding: 6rem 0;
}

.section-alt {
  background: var(--gray-50);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  line-height: 1.5;
}

.btn-primary {
  background: var(--gradient);
  color: var(--white);
  box-shadow: 0 4px 15px rgba(255,77,109,0.4);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255,77,109,0.5);
  color: var(--white);
}

.btn-secondary {
  background: var(--white);
  color: var(--gray-800);
  border: 2px solid var(--gray-200);
}
.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.3);
}
.btn-outline:hover {
  background: var(--white);
  color: var(--primary);
  border-color: var(--white);
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.125rem;
}

.btn-icon {
  width: 20px;
  height: 20px;
}

/* --- Header & Navigation --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow);
  padding: 0.5rem 0;
}

.header.scrolled .nav-link { color: var(--gray-700); }
.header.scrolled .nav-link:hover,
.header.scrolled .nav-link.active { color: var(--primary); }
.header.scrolled .logo-text { color: var(--gray-900); }

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.logo-icon {
  width: 42px;
  height: 42px;
  background: var(--gradient);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: 800;
  font-size: 1.25rem;
}

.logo-text {
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--white);
  transition: var(--transition);
}

.logo:hover .logo-text { color: var(--primary); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  transition: var(--transition);
  position: relative;
}

.nav-link:hover,
.nav-link.active { color: var(--white); }

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
}

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

.nav-cta .btn {
  padding: 0.625rem 1.5rem;
  font-size: 0.875rem;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}

.header.scrolled .mobile-toggle span { background: var(--gray-800); }

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--dark);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(124,58,237,0.3) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 50%, rgba(255,77,109,0.25) 0%, transparent 60%);
}

.hero-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-text h1 {
  color: var(--white);
  margin-bottom: 1.5rem;
}

.hero-text p {
  color: rgba(255,255,255,0.7);
  font-size: 1.25rem;
  margin-bottom: 2.5rem;
  max-width: 520px;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 3rem;
  margin-top: 3rem;
}

.stat-item h3 {
  color: var(--white);
  font-size: 2rem;
}

.stat-item p {
  color: rgba(255,255,255,0.5);
  font-size: 0.875rem;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.phone-mockup {
  position: relative;
  width: 280px;
  height: 560px;
  background: linear-gradient(145deg, #1a1a2e, #16162a);
  border-radius: 36px;
  border: 3px solid rgba(255,255,255,0.1);
  overflow: hidden;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, #2a1a3e 0%, #1a0a2e 50%, #0f0f1a 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.phone-screen .live-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary);
  color: var(--white);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.phone-screen .live-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--white);
  border-radius: 50%;
  animation: pulse 1.5s infinite;
}

.phone-screen .streamer-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--gradient);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--white);
}

.phone-screen .stream-info {
  text-align: center;
  color: var(--white);
}

.phone-screen .stream-info h4 {
  color: var(--white);
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.phone-screen .stream-info p {
  color: rgba(255,255,255,0.5);
  font-size: 0.8rem;
}

.floating-card {
  position: absolute;
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  color: var(--white);
  font-size: 0.8rem;
  animation: float 3s ease-in-out infinite;
}

.floating-card.card-1 { top: 15%; left: -60px; animation-delay: 0s; }
.floating-card.card-2 { bottom: 25%; right: -60px; animation-delay: 1s; }
.floating-card.card-3 { bottom: 10%; left: -40px; animation-delay: 2s; }

.floating-card .card-icon {
  font-size: 1.25rem;
  margin-bottom: 0.25rem;
}

.floating-card .card-num {
  font-weight: 700;
  font-size: 1.125rem;
}

/* --- Features Grid --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient);
  transform: scaleX(0);
  transition: var(--transition);
}

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

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

.feature-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-light);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
}

.feature-card h3 { margin-bottom: 0.75rem; }
.feature-card p { font-size: 0.9375rem; }

/* --- How It Works --- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  position: relative;
}

.steps::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 15%;
  right: 15%;
  height: 2px;
  background: var(--gray-200);
}

.step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 80px;
  height: 80px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--white);
  margin: 0 auto 1.5rem;
  position: relative;
  z-index: 1;
}

.step h3 { margin-bottom: 0.5rem; font-size: 1.125rem; }
.step p { font-size: 0.875rem; }

/* --- CTA Section --- */
.cta-section {
  background: var(--dark);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(124,58,237,0.2) 0%, transparent 70%);
}

.cta-content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.cta-content h2 { color: var(--white); margin-bottom: 1rem; }
.cta-content p { color: rgba(255,255,255,0.6); font-size: 1.125rem; margin-bottom: 2.5rem; max-width: 560px; margin-left: auto; margin-right: auto; }
.cta-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* --- Testimonials --- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.testimonial-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: var(--transition);
}

.testimonial-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.testimonial-stars {
  color: var(--accent);
  font-size: 1rem;
  margin-bottom: 1rem;
}

.testimonial-text {
  font-size: 0.9375rem;
  font-style: italic;
  margin-bottom: 1.5rem;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: 700;
  font-size: 1rem;
}

.author-info h4 { font-size: 0.9375rem; margin-bottom: 0; }
.author-info p { font-size: 0.8125rem; margin: 0; }

/* --- Download Section --- */
.download-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.download-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  text-align: center;
  transition: var(--transition);
}

.download-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.download-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 1.5rem;
  background: var(--gradient-light);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.download-card h3 { margin-bottom: 0.5rem; }
.download-card p { font-size: 0.875rem; margin-bottom: 1.5rem; }

.download-card .version {
  font-size: 0.75rem;
  color: var(--gray-400);
  margin-top: 0.75rem;
}

/* --- FAQ / Help --- */
.faq-list { max-width: 800px; margin: 0 auto; }

.faq-item {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  margin-bottom: 1rem;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.active {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px var(--primary);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  background: var(--white);
  border: none;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-800);
  text-align: left;
  transition: var(--transition);
}

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

.faq-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
  font-size: 1.25rem;
  color: var(--gray-400);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

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

.faq-answer-inner p { font-size: 0.9375rem; }

/* --- Contact --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact-info h2 { margin-bottom: 1rem; }
.contact-info > p { margin-bottom: 2rem; }

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-method {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.contact-method-icon {
  width: 48px;
  height: 48px;
  background: var(--gradient-light);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.contact-method h4 { font-size: 0.9375rem; margin-bottom: 0.25rem; }
.contact-method p { font-size: 0.875rem; margin: 0; }

.contact-form {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
}

.form-group { margin-bottom: 1.5rem; }

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 0.5rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  background: var(--white);
  transition: var(--transition);
  font-family: var(--font-sans);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(255,77,109,0.1);
}

textarea.form-control { resize: vertical; min-height: 120px; }

/* --- About --- */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-image {
  background: var(--gradient);
  border-radius: var(--radius-lg);
  padding: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  position: relative;
  overflow: hidden;
}

.about-image-text {
  color: var(--white);
  font-size: 4rem;
  font-weight: 900;
  opacity: 0.3;
  position: absolute;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.about-stat {
  background: var(--gray-50);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.about-stat h3 { font-size: 1.75rem; color: var(--primary); margin-bottom: 0.25rem; }
.about-stat p { font-size: 0.875rem; margin: 0; }

.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.team-card {
  text-align: center;
  padding: 2rem 1.5rem;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.team-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.team-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--gradient);
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--white);
}

.team-card h3 { font-size: 1.125rem; margin-bottom: 0.25rem; }
.team-card .role { color: var(--primary); font-size: 0.875rem; font-weight: 500; margin-bottom: 0.5rem; }
.team-card p { font-size: 0.8125rem; }

/* --- Legal Pages (Privacy, Terms) --- */
.legal-content {
  max-width: 800px;
  margin: 0 auto;
  padding-top: 8rem;
}

.legal-content h1 { margin-bottom: 0.5rem; }

.legal-meta {
  color: var(--gray-400);
  font-size: 0.875rem;
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--gray-200);
}

.legal-content h2 {
  font-size: 1.375rem;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

.legal-content h3 {
  font-size: 1.125rem;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

.legal-content p,
.legal-content li {
  font-size: 0.9375rem;
  margin-bottom: 1rem;
}

.legal-content ul {
  padding-left: 1.5rem;
  list-style: disc;
  margin-bottom: 1rem;
}

.legal-content ul li { margin-bottom: 0.5rem; }

/* --- Footer --- */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,0.6);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand .logo { margin-bottom: 1rem; }
.footer-brand .logo-text { color: var(--white); }
.footer-brand p { font-size: 0.875rem; line-height: 1.7; color: rgba(255,255,255,0.5); }

.footer-col h4 {
  color: var(--white);
  font-size: 0.9375rem;
  margin-bottom: 1.25rem;
}

.footer-col ul li { margin-bottom: 0.75rem; }

.footer-col ul li a {
  color: rgba(255,255,255,0.5);
  font-size: 0.875rem;
  transition: var(--transition);
}

.footer-col ul li a:hover { color: var(--primary); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-bottom p { font-size: 0.8125rem; color: rgba(255,255,255,0.4); margin: 0; }

.footer-social {
  display: flex;
  gap: 1rem;
}

.footer-social a {
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.5);
  transition: var(--transition);
  font-size: 0.875rem;
}

.footer-social a:hover {
  background: var(--primary);
  color: var(--white);
}

/* --- 404 Page --- */
.error-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--dark);
  text-align: center;
}

.error-code {
  font-size: 8rem;
  font-weight: 900;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 1rem;
}

.error-page h1 { color: var(--white); margin-bottom: 1rem; }
.error-page p { color: rgba(255,255,255,0.6); margin-bottom: 2rem; }

/* --- Page Header (Inner Pages) --- */
.page-header {
  background: var(--dark);
  padding: 10rem 0 5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(124,58,237,0.2) 0%, transparent 70%);
}

.page-header h1 {
  color: var(--white);
  position: relative;
  z-index: 1;
}

.page-header p {
  color: rgba(255,255,255,0.6);
  font-size: 1.125rem;
  max-width: 560px;
  margin: 1rem auto 0;
  position: relative;
  z-index: 1;
}

/* --- Breadcrumb --- */
.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  position: relative;
  z-index: 1;
}

.breadcrumb a,
.breadcrumb span {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.5);
}

.breadcrumb a:hover { color: var(--white); }
.breadcrumb .separator { color: rgba(255,255,255,0.3); }

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  background: var(--gradient);
  color: var(--white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition);
  z-index: 999;
}

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

.back-to-top:hover { transform: translateY(-4px); }

/* --- Animations --- */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

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

.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);
}

/* --- Mobile Navigation --- */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15,15,26,0.98);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
}

.mobile-nav.open { display: flex; }

.mobile-nav .nav-link {
  font-size: 1.5rem;
  color: var(--white);
}

.mobile-nav-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: none;
  border: none;
  color: var(--white);
  font-size: 2rem;
  cursor: pointer;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; text-align: center; }
  .hero-text p { margin: 0 auto 2.5rem; }
  .hero-buttons { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-visual { display: none; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .steps::before { display: none; }
  .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
  .download-options { grid-template-columns: repeat(2, 1fr); }
  .about-content { grid-template-columns: 1fr; }
  .about-image { min-height: 300px; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .mobile-toggle { display: flex; }
  .section { padding: 4rem 0; }
  .features-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; gap: 1.5rem; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .download-options { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; gap: 1.5rem; align-items: center; }
  .footer-grid { grid-template-columns: 1fr; text-align: center; }
  .footer-bottom { justify-content: center; text-align: center; }
  .footer-social { justify-content: center; }
  .about-stats { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .page-header { padding: 8rem 0 3rem; }
}