/* ============================================
   Xiiaozet Virtual USB — Product Landing Page
   Design System + Full Styles
   ============================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Noto+Sans+SC:wght@300;400;500;600;700;900&display=swap');

/* --- Design Tokens --- */
:root {
  /* Colors */
  --bg-primary: #050a14;
  --bg-secondary: #0a1225;
  --bg-tertiary: #0f1a30;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.07);
  --bg-glass: rgba(255, 255, 255, 0.06);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glass-hover: rgba(255, 255, 255, 0.15);

  --accent-1: #0075BE;
  --accent-2: #2A4691;
  --accent-3: #92CDE9;
  --accent-gradient: linear-gradient(135deg, var(--accent-3), var(--accent-1), var(--accent-2));
  --accent-gradient-h: linear-gradient(135deg, var(--accent-2), var(--accent-3));

  --green-accent: #46b8c8;
  --green-bg: rgba(70, 184, 200, 0.1);
  --red-accent: #f87171;
  --yellow-accent: #fbbf24;
  --blue-accent: #92CDE9;
  --cyan-accent: #92CDE9;

  --text-primary: #e8ecf4;
  --text-secondary: rgba(232, 236, 244, 0.65);
  --text-muted: rgba(232, 236, 244, 0.4);

  /* Typography */
  --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --section-padding: 100px 0;
  --container-width: 1140px;
  --card-radius: 16px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 24px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 40px rgba(0, 117, 190, 0.2);

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

/* Background decorative orbs */
body::before,
body::after {
  content: '';
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.15;
  z-index: 0;
  pointer-events: none;
}

body::before {
  width: 600px;
  height: 600px;
  background: var(--accent-1);
  top: -200px;
  right: -200px;
}

body::after {
  width: 500px;
  height: 500px;
  background: var(--accent-2);
  bottom: 20%;
  left: -150px;
}

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

a {
  text-decoration: none;
  color: var(--accent-1);
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-3);
}

/* --- Container --- */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* --- Navigation Header --- */
.nav-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  background: rgba(5, 10, 20, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition-base);
}

.nav-header.scrolled {
  padding: 10px 0;
  background: rgba(5, 10, 20, 0.92);
  border-bottom-color: var(--border-glass);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.nav-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.nav-logo-img {
  height: 36px;
  width: auto;
  filter: brightness(0) invert(1);
  transition: opacity var(--transition-fast);
}

.nav-logo:hover .nav-logo-img {
  opacity: 0.8;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-1);
  transition: width var(--transition-base);
}

.nav-links a:hover {
  color: var(--text-primary);
}

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

.nav-actions {
  flex-shrink: 0;
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.82rem;
  border-radius: var(--radius-sm);
}

/* --- Section Common --- */
.section {
  padding: var(--section-padding);
  position: relative;
}

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

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent-1);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 20px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

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

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
}

/* --- Animated Entry --- */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* stagger children */
.stagger > .animate-on-scroll:nth-child(1) { transition-delay: 0.05s; }
.stagger > .animate-on-scroll:nth-child(2) { transition-delay: 0.12s; }
.stagger > .animate-on-scroll:nth-child(3) { transition-delay: 0.19s; }
.stagger > .animate-on-scroll:nth-child(4) { transition-delay: 0.26s; }
.stagger > .animate-on-scroll:nth-child(5) { transition-delay: 0.33s; }
.stagger > .animate-on-scroll:nth-child(6) { transition-delay: 0.40s; }

/* ============================
   HERO SECTION
   ============================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(0, 117, 190, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  backdrop-filter: blur(12px);
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--green-accent);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.hero-description {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 48px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition-base);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: 0 4px 20px rgba(0, 117, 190, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 117, 190, 0.5);
  color: #fff;
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(12px);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glass-hover);
  transform: translateY(-2px);
  color: var(--text-primary);
}

.btn .icon {
  font-size: 1.2em;
}

.hero-download-hint {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ============================
   DOWNLOAD & INSTALL GUIDE
   ============================ */
.download-guide {
  max-width: 900px;
  margin: 0 auto;
}

.download-steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
}

.download-step {
  flex: 1;
  text-align: center;
  max-width: 220px;
}

.step-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  margin: 0 auto 12px;
}

.step-text {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.step-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.step-arrow {
  font-size: 1.5rem;
  color: var(--accent-1);
  margin-top: 12px;
  flex-shrink: 0;
  animation: arrow-pulse 1.5s ease-in-out infinite;
}

.download-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.download-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--card-radius);
  padding: 36px 28px;
  text-align: center;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.download-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glass-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.download-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.download-card-icon {
  font-size: 1.6rem;
}

.download-card-header h3 {
  font-size: 1.15rem;
  font-weight: 700;
}

.download-card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 24px;
  flex-grow: 1;
}

.download-card-btn {
  width: 100%;
  justify-content: center;
}

.download-sys-req {
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* Flagship free license button */
.btn-flagship-free {
  display: block;
  text-align: center;
  margin-top: 24px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  text-decoration: none;
  transition: all var(--transition-base);
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.25);
}

.btn-flagship-free:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(245, 158, 11, 0.4);
  color: #fff;
}

/* ============================
   PAIN POINTS SECTION
   ============================ */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.pain-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--card-radius);
  padding: 36px 28px;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.pain-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.pain-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glass-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

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

.pain-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  background: rgba(0, 117, 190, 0.12);
}

.pain-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--red-accent);
  font-weight: 600;
  margin-bottom: 8px;
}

.pain-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.4;
}

.pain-solution {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 16px;
  background: var(--green-bg);
  border-radius: var(--radius-sm);
  margin-top: 16px;
}

.pain-solution .check {
  color: var(--green-accent);
  font-size: 1rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.pain-solution p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ============================
   FEATURES SECTION
   ============================ */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 100px;
}

.feature-block:last-child {
  margin-bottom: 0;
}

.feature-block.reverse {
  direction: rtl;
}

.feature-block.reverse > * {
  direction: ltr;
}

.feature-text .feature-icon-large {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 24px;
  background: var(--accent-gradient);
  box-shadow: 0 8px 24px rgba(0, 117, 190, 0.3);
}

.feature-text h3 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.feature-text p {
  color: var(--text-secondary);
  margin-bottom: 24px;
  font-size: 1.02rem;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.feature-list li .check-icon {
  color: var(--green-accent);
  flex-shrink: 0;
  margin-top: 3px;
  font-size: 0.9rem;
}

.feature-visual {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--card-radius);
  padding: 40px;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.feature-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 40%, rgba(0, 117, 190, 0.1) 0%, transparent 60%);
}

/* Feature visual inner card illustrations */
.visual-usb-share {
  text-align: center;
  position: relative;
  z-index: 1;
}

.usb-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.usb-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.usb-node .node-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
}

.usb-node .node-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
}

.usb-arrow {
  font-size: 1.4rem;
  color: var(--accent-1);
  animation: arrow-pulse 1.5s ease-in-out infinite;
}

@keyframes arrow-pulse {
  0%, 100% { opacity: 0.4; transform: translateX(0); }
  50% { opacity: 1; transform: translateX(4px); }
}

/* management features mini table */
.mgmt-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.mgmt-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.mgmt-item:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glass-hover);
}

.mgmt-item .mgmt-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
}

.mgmt-item span {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ============================
   PRICING / VERSION COMPARISON
   ============================ */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  max-width: 820px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--card-radius);
  padding: 40px 32px;
  transition: all var(--transition-base);
  position: relative;
}

.pricing-card.featured {
  border-color: var(--accent-1);
  box-shadow: var(--shadow-glow);
}

.pricing-card.featured::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  border-radius: var(--card-radius) var(--card-radius) 0 0;
}

.pricing-tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.pricing-card:not(.featured) .pricing-tag {
  background: var(--bg-glass);
  color: var(--text-secondary);
}

.pricing-card.featured .pricing-tag {
  background: rgba(0, 117, 190, 0.18);
  color: var(--accent-1);
}

.pricing-card h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.pricing-price {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.pricing-features li .pf-icon {
  font-size: 0.85rem;
  flex-shrink: 0;
}

.pricing-features li .pf-icon.yes {
  color: var(--green-accent);
}

.pricing-features li .pf-icon.no {
  color: var(--text-muted);
}

.pricing-features li.disabled {
  opacity: 0.4;
}

/* ============================
   SCENARIOS
   ============================ */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.scenario-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--card-radius);
  padding: 36px 28px;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.scenario-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glass-hover);
  transform: translateY(-4px);
}

.scenario-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

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

.scenario-card blockquote {
  font-size: 0.88rem;
  color: var(--text-secondary);
  font-style: italic;
  border-left: 3px solid var(--accent-1);
  padding-left: 14px;
  margin-bottom: 16px;
  line-height: 1.6;
}

.scenario-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.scenario-tags span {
  padding: 4px 12px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: 999px;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* ============================
   ADVANTAGES
   ============================ */
.advantage-table-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--card-radius);
  overflow: hidden;
}

.advantage-table {
  width: 100%;
  border-collapse: collapse;
}

.advantage-table thead th {
  padding: 20px 24px;
  text-align: left;
  font-weight: 700;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border-glass);
  background: rgba(255, 255, 255, 0.02);
}

.advantage-table thead th:nth-child(2) {
  color: var(--accent-1);
}

.advantage-table tbody td {
  padding: 16px 24px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.advantage-table tbody tr:last-child td {
  border-bottom: none;
}

.advantage-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

.advantage-table tbody td:nth-child(2) {
  color: var(--green-accent);
  font-weight: 500;
}

/* ============================
   SPECS
   ============================ */
.specs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 900px;
  margin: 0 auto;
}

.spec-item {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: all var(--transition-fast);
}

.spec-item:hover {
  border-color: var(--border-glass-hover);
  background: var(--bg-card-hover);
}

.spec-item .spec-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.spec-item .spec-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ============================
   FAQ
   ============================ */
.faq-list {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  user-select: none;
  font-weight: 600;
  font-size: 0.95rem;
  gap: 16px;
  transition: background var(--transition-fast);
}

.faq-question:hover {
  background: rgba(255, 255, 255, 0.02);
}

.faq-chevron {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  transition: transform var(--transition-base);
  color: var(--text-muted);
}

.faq-item.open .faq-chevron {
  transform: rotate(180deg);
  color: var(--accent-1);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1),
              padding 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* ============================
   FOOTER
   ============================ */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--border-glass);
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.footer-brand {
  font-size: 1.1rem;
  font-weight: 700;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--accent-1);
}

.footer-copy {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ============================
   RESPONSIVE
   ============================ */
@media (max-width: 1024px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .feature-block.reverse {
    direction: ltr;
  }

  .pricing-grid {
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 64px 0;
  }

  .nav-links {
    display: none;
  }

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

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

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 420px;
  }

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

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

  .advantage-table-wrapper {
    overflow-x: auto;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .download-cards {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin-left: auto;
    margin-right: auto;
  }

  .download-steps {
    flex-direction: column;
    align-items: center;
  }

  .step-arrow {
    transform: rotate(90deg);
    margin: 0;
  }
}

@media (max-width: 480px) {
  .nav-logo-img {
    height: 28px;
  }

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

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

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

  .hero h1 {
    font-size: 1.7rem;
  }
}