/* Aurora Glassmorphism Design System for nai-cloud.sbs */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@500;700&display=swap');

:root {
  --bg-deep: #050510;
  --aurora-violet: #7C6CFF;
  --aurora-cyan: #4ED6C1;
  --aurora-magenta: #B03DF5;
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-bg-hover: rgba(255, 255, 255, 0.08);
  --glass-border: 1px solid rgba(255, 255, 255, 0.1);
  --glass-border-highlight: 1px solid rgba(124, 108, 255, 0.4);
  --radius-card: 22px;
  --radius-pill: 9999px;
  --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  --gradient-brand: linear-gradient(135deg, #7C6CFF 0%, #4ED6C1 100%);
  --gradient-magenta: linear-gradient(135deg, #B03DF5 0%, #7C6CFF 100%);
  --text-primary: #F0F2FF;
  --text-secondary: #9BA3BF;
  --text-muted: #626B88;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.7;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Background Aurora Spot Lights */
.aurora-bg-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

.aurora-spot {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.45;
  will-change: transform;
  transition: transform 0.4s ease-out;
}

.aurora-spot-1 {
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, var(--aurora-violet) 0%, transparent 70%);
  top: -15%;
  left: 10%;
  animation: drift1 22s infinite alternate ease-in-out;
}

.aurora-spot-2 {
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, var(--aurora-cyan) 0%, transparent 70%);
  top: 35%;
  right: -10%;
  animation: drift2 26s infinite alternate ease-in-out;
}

.aurora-spot-3 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--aurora-magenta) 0%, transparent 70%);
  bottom: 5%;
  left: 20%;
  animation: drift3 24s infinite alternate ease-in-out;
}

@keyframes drift1 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(60px, 80px) scale(1.12); }
  100% { transform: translate(-40px, 120px) scale(0.95); }
}

@keyframes drift2 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-80px, -60px) scale(1.15); }
  100% { transform: translate(50px, -100px) scale(0.92); }
}

@keyframes drift3 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(70px, -70px) scale(1.08); }
  100% { transform: translate(-60px, 50px) scale(1.18); }
}

/* Glassmorphism Card Utility */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: var(--glass-border);
  border-radius: var(--radius-card);
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.glass-panel:hover {
  background: var(--glass-bg-hover);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

/* Typography Helpers */
h1, h2, h3, h4, .brand-font {
  font-family: var(--font-heading);
  letter-spacing: -0.02em;
  font-weight: 700;
}

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

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  padding: 13px 28px;
  border-radius: var(--radius-pill);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  z-index: 1;
}

.btn-primary {
  background: var(--gradient-brand);
  color: #050510;
  box-shadow: 0 8px 24px rgba(78, 214, 193, 0.3);
  border: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(78, 214, 193, 0.5);
  color: #050510;
}

.btn-glass {
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: var(--glass-border);
  color: var(--text-primary);
}

.btn-glass:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
  color: #FFF;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

/* Header & Nav */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(5, 5, 16, 0.7);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-size: 1.5rem;
  font-family: var(--font-heading);
  font-weight: 700;
  color: #FFF;
}

.nav-logo-icon {
  width: 34px;
  height: 34px;
  background: var(--gradient-brand);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #050510;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-menu a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.25s;
}

.nav-menu a:hover, .nav-menu a.active {
  color: var(--text-primary);
}

.nav-badge-news {
  padding: 4px 10px;
  background: rgba(124, 108, 255, 0.15);
  border: 1px solid rgba(124, 108, 255, 0.4);
  border-radius: var(--radius-pill);
  color: #A78BFA !important;
}

/* Hero Section */
.hero-section {
  padding: 100px 0 70px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-pill);
  font-size: 0.88rem;
  color: var(--aurora-cyan);
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3.5rem;
  line-height: 1.18;
  margin-bottom: 22px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.hero-subtitle {
  font-size: 1.22rem;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 36px;
  font-weight: 400;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 60px;
  flex-wrap: wrap;
}

/* Stats Counter Row */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1060px;
  margin: 0 auto;
}

.stat-card {
  padding: 24px 18px;
  text-align: center;
}

.stat-number {
  font-size: 2.6rem;
  font-weight: 700;
  font-family: var(--font-heading);
  line-height: 1.1;
  margin-bottom: 6px;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Section Header */
.section-title-wrap {
  text-align: center;
  margin-bottom: 50px;
}

.section-tag {
  font-size: 0.85rem;
  text-transform: uppercase;
  color: var(--aurora-violet);
  letter-spacing: 0.08em;
  font-weight: 600;
  margin-bottom: 8px;
}

.section-title {
  font-size: 2.4rem;
  margin-bottom: 12px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto;
}

/* Features Grid - 6 cards with 3D Tilt */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  padding: 34px 28px;
  transform-style: preserve-3d;
  will-change: transform;
}

.feature-icon-box {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: rgba(124, 108, 255, 0.15);
  border: 1px solid rgba(124, 108, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
  color: var(--aurora-cyan);
}

.feature-title {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Streaming & AI Cards */
.media-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.media-card {
  padding: 34px 30px;
}

.media-badge-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.media-pill {
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.pricing-popular {
  border: 1.5px solid;
  border-image: var(--gradient-brand) 1;
  background: rgba(124, 108, 255, 0.08);
  box-shadow: 0 10px 40px rgba(124, 108, 255, 0.2);
  transform: scale(1.03);
}

.popular-badge {
  position: absolute;
  top: 14px;
  right: 20px;
  background: var(--gradient-brand);
  color: #050510;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  text-transform: uppercase;
}

.price-box {
  margin: 22px 0;
}

.price-currency {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--aurora-cyan);
}

.price-value {
  font-size: 3.2rem;
  font-weight: 700;
  font-family: var(--font-heading);
  line-height: 1;
}

.price-cycle {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.pricing-features {
  list-style: none;
  margin-bottom: 30px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.pricing-features li {
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
}

.pricing-features li span {
  color: var(--aurora-cyan);
  font-weight: bold;
}

.refund-notice {
  text-align: center;
  margin-top: 30px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Reviews Grid */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  padding: 30px 26px;
}

.review-stars {
  color: #FFD02F;
  margin-bottom: 14px;
  font-size: 1.1rem;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
}

.reviewer-box {
  display: flex;
  align-items: center;
  gap: 12px;
}

.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #050510;
}

.reviewer-name {
  font-size: 0.95rem;
  font-weight: 600;
}

.reviewer-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* FAQ Accordion */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  padding: 22px 26px;
  cursor: pointer;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.1rem;
  font-weight: 600;
}

.faq-answer {
  margin-top: 14px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-toggle-icon {
  font-size: 1.4rem;
  transition: transform 0.3s;
}

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

/* Footer: STRICTLY ONLY 4 TITLES OPENING IN NEW TAB */
.site-footer {
  margin-top: 100px;
  padding: 40px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(5, 5, 16, 0.9);
}

.footer-nav-container {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
  margin-bottom: 20px;
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 500;
  transition: color 0.25s;
}

.footer-link:hover {
  color: var(--aurora-cyan);
}

.footer-copyright {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Scroll Animation */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Mobile Responsive Media Query */
@media (max-width: 900px) {
  .hero-title {
    font-size: 2.3rem;
  }
  .nav-menu {
    display: none;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid, .pricing-grid, .reviews-grid, .media-grid {
    grid-template-columns: 1fr;
  }
  .pricing-popular {
    transform: none;
  }
  .footer-nav-container {
    flex-wrap: wrap;
    gap: 20px;
  }
}