/* ═══════════════════════════════════════════════════════════════════════════
   Q Boxs — Global Stylesheet (Dark Tech Theme)
   ═══════════════════════════════════════════════════════════════════════════ */

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

:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #0f1520;
  --bg-card: rgba(15, 21, 35, 0.7);
  --bg-card-hover: rgba(20, 28, 50, 0.85);
  --border-subtle: rgba(99, 102, 241, 0.15);
  --border-hover: rgba(99, 102, 241, 0.4);
  --text-primary: #f0f2f8;
  --text-secondary: #8b92a8;
  --text-muted: #5a6178;
  --accent-start: #6366f1;
  --accent-end: #8b5cf6;
  --accent-glow: rgba(99, 102, 241, 0.25);
  --success: #22c55e;
  --radius: 12px;
  --radius-lg: 20px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  --max-w: 1200px;
  --nav-h: 72px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ─── Typography ─────────────────────────────────────────────────────────── */
.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin-bottom: 48px;
}

.section-header { text-align: center; margin-bottom: 56px; }
.section-header .section-subtitle { margin-left: auto; margin-right: auto; }

/* ─── Buttons ────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 10px;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(99, 102, 241, 0.4);
}

.btn-outline {
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  background: transparent;
}
.btn-outline:hover {
  border-color: var(--border-hover);
  background: rgba(99, 102, 241, 0.08);
}

.btn-large { padding: 16px 36px; font-size: 1.05rem; border-radius: 12px; }
.btn-ghost { color: var(--text-secondary); }
.btn-ghost:hover { color: var(--text-primary); }

/* ─── Navbar ─────────────────────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-h);
  z-index: 1000;
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.navbar.scrolled {
  background: rgba(10, 14, 23, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #fff, #c4b5fd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.nav-links a, .nav-dropdown-trigger {
  padding: 8px 14px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: var(--transition);
}
.nav-links a:hover, .nav-dropdown-trigger:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

/* Nav dropdown */
.nav-dropdown {
  position: relative;
}
.nav-dropdown-trigger {
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}
.nav-dropdown-trigger svg {
  width: 14px;
  height: 14px;
  transition: transform var(--transition);
}
.nav-dropdown:hover .nav-dropdown-trigger svg { transform: rotate(180deg); }

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 220px;
  background: rgba(15, 21, 35, 0.95);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}
.nav-dropdown:hover .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.nav-dropdown-menu a {
  display: block;
  padding: 10px 14px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  border-radius: 8px;
}
.nav-dropdown-menu a:hover {
  color: var(--text-primary);
  background: rgba(99, 102, 241, 0.1);
}
.nav-dropdown-menu .dd-label {
  font-weight: 600;
  color: var(--text-primary);
}
.nav-dropdown-menu .dd-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Language toggle */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 2px;
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 2px;
  margin-left: 8px;
}
.lang-toggle button {
  padding: 5px 10px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  border-radius: 6px;
  transition: var(--transition);
}
.lang-toggle button.active {
  color: #fff;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
}

.nav-cta {
  margin-left: 8px;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 4px 0;
}
.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ─── Hero ────────────────────────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--nav-h) + 40px) 24px 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 40px;
  border: 1px solid var(--border-subtle);
  background: rgba(99, 102, 241, 0.06);
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
}
.hero-badge .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--success);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}
.hero h1 .gradient-text {
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end), #c084fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
}

.hero-visual {
  margin-top: 48px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}
.hero-visual img {
  width: 100%;
  display: block;
}

.hero-trust {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-top: 36px;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.hero-trust .divider { opacity: 0.3; }

/* ─── Feature Cards ──────────────────────────────────────────────────────── */
.features-section { padding: 100px 0; }

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition);
}
.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(99, 102, 241, 0.1);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(139, 92, 246, 0.15));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--accent-start);
}
.feature-icon svg { width: 24px; height: 24px; }

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ─── Feature Row (product page alternating layout) ──────────────────────── */
.feature-rows { padding: 80px 0; }

.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 100px;
}
.feature-row:last-child { margin-bottom: 0; }
.feature-row.reverse .feature-row-visual { order: -1; }

.feature-row-visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  aspect-ratio: 16/10;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.feature-row-content .section-label { margin-bottom: 8px; }
.feature-row-content h3 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 16px;
}
.feature-row-content p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.8;
}
.feature-row-content .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.feature-row-content .tags span {
  padding: 5px 14px;
  font-size: 0.8rem;
  border-radius: 20px;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

/* ─── Steps ──────────────────────────────────────────────────────────────── */
.steps-section { padding: 100px 0; }

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.step-card {
  text-align: center;
  padding: 32px 20px;
  position: relative;
}
.step-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  color: #fff;
  font-weight: 800;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}
.step-card h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
.step-card p { font-size: 0.88rem; color: var(--text-secondary); }

/* ─── Use Cases ──────────────────────────────────────────────────────────── */
.use-cases-section { padding: 100px 0; }

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}

.use-case-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: var(--transition);
}
.use-case-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}
.use-case-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; }
.use-case-card p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.7; }

/* ─── Testimonials ───────────────────────────────────────────────────────── */
.testimonials-section { padding: 100px 0; }

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
}
.testimonial-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}
.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  color: #fff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.testimonial-header h4 { font-size: 0.95rem; font-weight: 700; }
.testimonial-header span { font-size: 0.8rem; color: var(--text-muted); }
.testimonial-stars { color: #fbbf24; margin-bottom: 12px; letter-spacing: 2px; }
.testimonial-card > p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; }

/* ─── CTA Banner ─────────────────────────────────────────────────────────── */
.cta-banner {
  padding: 80px 0;
  text-align: center;
}
.cta-banner-inner {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(139, 92, 246, 0.12));
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
}
.cta-banner h2 { font-size: 2rem; font-weight: 800; margin-bottom: 12px; }
.cta-banner p { color: var(--text-secondary); margin-bottom: 32px; }
.cta-banner .btn-group { display: flex; align-items: center; justify-content: center; gap: 16px; }

/* ─── Pricing ────────────────────────────────────────────────────────────── */
.pricing-section { padding: 100px 0; }

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
  max-width: 760px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  transition: var(--transition);
  position: relative;
}
.pricing-card.featured {
  border-color: var(--accent-start);
  box-shadow: 0 0 40px var(--accent-glow);
}
.pricing-card.featured::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  z-index: -1;
  opacity: 0.15;
}
.pricing-tag {
  display: inline-block;
  padding: 4px 14px;
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: 20px;
  margin-bottom: 20px;
}
.pricing-card:not(.featured) .pricing-tag {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
}
.pricing-card.featured .pricing-tag {
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  color: #fff;
}
.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 12px;
  margin-bottom: 4px;
}
.pricing-original {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: line-through;
  text-decoration-color: rgba(239, 68, 68, 0.7);
  text-decoration-thickness: 2px;
}
.pricing-price {
  font-size: 3rem;
  font-weight: 900;
}
.pricing-period { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 28px; }
.pricing-features {
  text-align: left;
  margin-bottom: 32px;
}
.pricing-features li {
  padding: 8px 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
}
.pricing-features .check {
  color: var(--success);
  font-weight: 700;
}
.pricing-features .cross {
  color: var(--text-muted);
}

/* ─── Support / FAQ ──────────────────────────────────────────────────────── */
.faq-section { padding: 100px 0; }

.faq-list {
  max-width: 760px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border-subtle);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  transition: var(--transition);
}
.faq-question:hover { color: var(--accent-start); }
.faq-icon {
  font-size: 1.3rem;
  transition: transform var(--transition);
  color: var(--text-muted);
}
.faq-item.active .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.faq-item.active .faq-answer { max-height: 300px; }
.faq-answer p {
  padding-bottom: 20px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ─── Install Guide (support page) ───────────────────────────────────────── */
.install-section { padding: 100px 0; }

.install-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
  justify-content: center;
}
.install-tab {
  padding: 10px 24px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 8px;
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  transition: var(--transition);
}
.install-tab.active {
  color: #fff;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  border-color: transparent;
}
.install-content {
  max-width: 700px;
  margin: 0 auto;
}
.install-step {
  display: flex;
  gap: 20px;
  margin-bottom: 28px;
}
.install-step-num {
  width: 36px;
  height: 36px;
  min-width: 36px;
  border-radius: 50%;
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-start);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.install-step-text h4 { font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.install-step-text p { font-size: 0.9rem; color: var(--text-secondary); }
.install-step-text code {
  display: inline-block;
  margin-top: 6px;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 6px;
  font-size: 0.82rem;
  color: var(--accent-start);
}

/* ─── Contact (support page) ─────────────────────────────────────────────── */
.contact-section { padding: 80px 0; }

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  max-width: 760px;
  margin: 0 auto;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
}
.contact-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 12px; }
.contact-card p { font-size: 0.9rem; color: var(--text-secondary); }
.contact-card .qr-img { width: 160px; margin: 16px auto 0; border-radius: 8px; }

/* ─── About Page ─────────────────────────────────────────────────────────── */
.about-hero {
  padding: calc(var(--nav-h) + 80px) 24px 80px;
  text-align: center;
}
.about-hero h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 900; margin-bottom: 16px; }
.about-hero p { font-size: 1.1rem; color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

.about-section { padding: 80px 0; }

.about-values {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.about-value-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
}
.about-value-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; }
.about-value-card p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; }

.roadmap { max-width: 600px; margin: 0 auto; }
.roadmap-item {
  display: flex;
  gap: 20px;
  margin-bottom: 32px;
  position: relative;
}
.roadmap-dot {
  width: 14px;
  height: 14px;
  min-width: 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  margin-top: 4px;
}
.roadmap-item:not(:last-child)::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 22px;
  width: 2px;
  height: calc(100% - 4px);
  background: var(--border-subtle);
}
.roadmap-item h4 { font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.roadmap-item p { font-size: 0.88rem; color: var(--text-secondary); }
.roadmap-item .rm-tag {
  display: inline-block;
  font-size: 0.72rem;
  padding: 2px 10px;
  border-radius: 12px;
  margin-bottom: 4px;
  font-weight: 600;
}
.rm-tag.current { background: rgba(34, 197, 94, 0.15); color: var(--success); }
.rm-tag.upcoming { background: rgba(99, 102, 241, 0.15); color: var(--accent-start); }

/* ─── Spec Table (product page) ──────────────────────────────────────────── */
.spec-table {
  max-width: 600px;
  margin: 0 auto;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  overflow: hidden;
}
.spec-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  border-bottom: 1px solid var(--border-subtle);
}
.spec-row:last-child { border-bottom: none; }
.spec-label {
  padding: 14px 20px;
  font-size: 0.88rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.02);
}
.spec-value {
  padding: 14px 20px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

/* ─── Footer ─────────────────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand h3 {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #fff, #c4b5fd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer-brand p { font-size: 0.88rem; color: var(--text-muted); max-width: 320px; }

.footer-column h4 {
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.footer-column a {
  display: block;
  font-size: 0.88rem;
  color: var(--text-muted);
  padding: 4px 0;
  transition: var(--transition);
}
.footer-column a:hover { color: var(--text-primary); }
.footer-column p {
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 2px 0;
}

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ─── Payment Modal ──────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}
.modal-overlay.active { opacity: 1; visibility: visible; }

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px;
  max-width: 420px;
  width: 90%;
  text-align: center;
}
.modal h3 { font-size: 1.3rem; font-weight: 800; margin-bottom: 8px; }
.modal-price { font-size: 2.5rem; font-weight: 900; margin-bottom: 8px; }
.modal-note { font-size: 0.88rem; color: var(--text-secondary); margin-bottom: 24px; }
.modal .qr-img { width: 200px; margin: 0 auto 16px; border-radius: 12px; }
.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  font-size: 1.3rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: var(--transition);
}
.modal-close:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }
.modal-help { font-size: 0.8rem; color: var(--text-muted); margin-top: 16px; }

/* ─── Payment Modal (multi-step) ─────────────────────────────────────────── */
.pay-modal { max-width: 460px; }
.pay-tabs {
  display: flex;
  gap: 8px;
  margin: 16px 0;
}
.pay-tab {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
  background: transparent;
}
.pay-tab.active {
  border-color: var(--accent-start);
  color: var(--text-primary);
  background: rgba(99, 102, 241, 0.08);
}
.pay-tab:hover { border-color: var(--border-hover); color: var(--text-primary); }
.pay-tab svg { flex-shrink: 0; }

.pay-qr-wrap { margin: 16px 0; text-align: center; }
.pay-qr img {
  width: 220px;
  margin: 0 auto;
  border-radius: 12px;
  border: 1px solid var(--border-subtle);
}
.pay-hint {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 8px;
}
.pay-contact {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 12px;
}

/* Step 2 — success */
.pay-success-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, #22c55e, #16a34a);
  color: #fff;
  font-size: 1.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.pay-success-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.license-display {
  background: rgba(99, 102, 241, 0.06);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}
.license-label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}
.license-code {
  font-size: 1.5rem;
  font-weight: 900;
  font-family: 'SF Mono', 'Fira Code', monospace;
  letter-spacing: 2px;
  color: var(--text-primary);
  margin-bottom: 12px;
  word-break: break-all;
}
.btn-copy {
  display: inline-block;
  padding: 6px 20px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  transition: var(--transition);
  cursor: pointer;
  border: none;
}
.btn-copy:hover { opacity: 0.85; }
.btn-copy.copied { background: #22c55e; }

.phone-bind {
  text-align: left;
  margin-bottom: 16px;
}
.phone-bind label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.phone-input-row {
  display: flex;
  gap: 8px;
}
.phone-input-row input {
  flex: 1;
  padding: 10px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border-subtle);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
}
.phone-input-row input:focus { border-color: var(--accent-start); }
.phone-input-row input::placeholder { color: var(--text-muted); }
.phone-input-row .btn { padding: 10px 20px; font-size: 0.85rem; white-space: nowrap; }
.phone-status {
  font-size: 0.8rem;
  margin-top: 6px;
  min-height: 1.2em;
}
.phone-status.success { color: var(--success); }
.phone-status.error { color: #ef4444; }

.pay-tips {
  text-align: left;
  background: rgba(255,255,255,0.02);
  border-radius: var(--radius);
  padding: 12px 16px;
}
.pay-tips p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ─── Recover Page ───────────────────────────────────────────────────────── */
.recover-section {
  min-height: calc(100vh - var(--nav-h) - 200px);
  display: flex;
  align-items: center;
  padding: 40px 0;
}
.recover-card {
  max-width: 500px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  text-align: center;
}
.recover-card h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 8px;
}
.recover-card .recover-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
}
.recover-input-row {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
}
.recover-input-row input {
  flex: 1;
  padding: 12px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border-subtle);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
}
.recover-input-row input:focus { border-color: var(--accent-start); }
.recover-input-row input::placeholder { color: var(--text-muted); }

.recover-results { text-align: left; }
.recover-empty {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 20px 0;
}
.recover-item {
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 12px;
}
.recover-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}
.recover-item-date {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.recover-item-amount {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-start);
}
.recover-item-key {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: 1.5px;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.recover-item .btn-copy {
  font-size: 0.8rem;
  padding: 4px 14px;
}

/* ─── Back to Top ────────────────────────────────────────────────────────── */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 900;
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { border-color: var(--border-hover); color: var(--text-primary); }

/* ─── Cursor Glow ────────────────────────────────────────────────────────── */
.cursor-glow {
  position: fixed;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s;
  opacity: 0;
}
body:hover .cursor-glow { opacity: 1; }

/* ─── Card Glow on Hover (cursor-following highlight) ────────────────────── */
.feature-card,
.use-case-card,
.testimonial-card,
.pricing-card,
.about-value-card,
.contact-card {
  position: relative;
  overflow: hidden;
}

.feature-card::before,
.use-case-card::before,
.testimonial-card::before,
.pricing-card::before,
.about-value-card::before,
.contact-card::before {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.12) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0;
  transform: translate(-50%, -50%);
  transition: opacity 0.4s;
  z-index: 0;
}
.feature-card:hover::before,
.use-case-card:hover::before,
.testimonial-card:hover::before,
.pricing-card:hover::before,
.about-value-card:hover::before,
.contact-card:hover::before { opacity: 1; }

.feature-card > *,
.use-case-card > *,
.testimonial-card > *,
.pricing-card > *,
.about-value-card > *,
.contact-card > * { position: relative; z-index: 1; }

/* ─── Tilt 3D on cards ──────────────────────────────────────────────────── */
.tilt-card { transition: transform 0.15s ease-out; transform-style: preserve-3d; }

/* ─── Magnetic Button ────────────────────────────────────────────────────── */
.btn { transition: var(--transition), transform 0.2s ease-out; }

/* ─── Floating Particles (hero) ──────────────────────────────────────────── */
.particles-canvas {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* ─── Gradient Text Animation ────────────────────────────────────────────── */
.gradient-text {
  background-size: 200% 200%;
  animation: gradientShift 4s ease infinite;
}
@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ─── Staggered Reveal ───────────────────────────────────────────────────── */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal-stagger.visible > *:nth-child(1) { transition-delay: 0s; }
.reveal-stagger.visible > *:nth-child(2) { transition-delay: 0.1s; }
.reveal-stagger.visible > *:nth-child(3) { transition-delay: 0.2s; }
.reveal-stagger.visible > *:nth-child(4) { transition-delay: 0.3s; }
.reveal-stagger.visible > *:nth-child(5) { transition-delay: 0.4s; }
.reveal-stagger.visible > *:nth-child(6) { transition-delay: 0.5s; }
.reveal-stagger.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Hero Floating Elements ─────────────────────────────────────────────── */
.hero-float {
  animation: heroFloat 6s ease-in-out infinite;
}
@keyframes heroFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* ─── Glow Pulse on Feature Icons ────────────────────────────────────────── */
.feature-icon {
  transition: box-shadow var(--transition), transform var(--transition);
}
.feature-card:hover .feature-icon {
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
  transform: scale(1.1);
}

/* ─── Step Number Bounce ─────────────────────────────────────────────────── */
.step-card:hover .step-number {
  animation: stepBounce 0.5s ease;
}
@keyframes stepBounce {
  0%, 100% { transform: scale(1); }
  40% { transform: scale(1.2); }
  60% { transform: scale(0.95); }
}

/* ─── Nav Logo Glow ──────────────────────────────────────────────────────── */
.nav-logo { transition: text-shadow var(--transition); }
.nav-logo:hover { text-shadow: 0 0 20px rgba(196, 181, 253, 0.5); }

/* ─── CTA shimmer ────────────────────────────────────────────────────────── */
.btn-primary { position: relative; overflow: hidden; }
.btn-primary::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  transition: none;
  animation: shimmer 3s ease-in-out infinite;
}
@keyframes shimmer {
  0% { left: -100%; }
  50%, 100% { left: 150%; }
}

/* ─── Testimonial Hover Lift ─────────────────────────────────────────────── */
.testimonial-card { transition: var(--transition); }
.testimonial-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 48px rgba(99, 102, 241, 0.12);
  border-color: var(--border-hover);
}

/* ─── Pricing Card Hover Scale ───────────────────────────────────────────── */
.pricing-card:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

/* ─── Roadmap Dot Pulse ──────────────────────────────────────────────────── */
.roadmap-item:first-child .roadmap-dot {
  animation: dotPulse 2s ease-in-out infinite;
}
@keyframes dotPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.4); }
  50% { box-shadow: 0 0 0 8px rgba(99, 102, 241, 0); }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ─── Scroll Reveal ──────────────────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Page Header (subpages) ─────────────────────────────────────────────── */
.page-header {
  padding: calc(var(--nav-h) + 60px) 24px 60px;
  text-align: center;
}

/* ─── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-links, .nav-cta, .lang-toggle { display: none; }
  .nav-toggle { display: flex; }

  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: rgba(10, 14, 23, 0.98);
    backdrop-filter: blur(20px);
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-subtle);
    gap: 4px;
  }
  .nav-links.mobile-open ~ .lang-toggle {
    display: flex;
    position: absolute;
    top: calc(var(--nav-h) + 100%);
    right: 24px;
  }

  .hero h1 { font-size: 2.2rem; }
  .hero-actions { flex-direction: column; }

  .feature-row { grid-template-columns: 1fr; gap: 32px; }
  .feature-row.reverse .feature-row-visual { order: 0; }

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

  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }

  .spec-row { grid-template-columns: 120px 1fr; }
}

@media (max-width: 480px) {
  .steps-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
}