:root {
  --bg: #030712;
  --bg-alt: #0f172a;
  --primary: #06b6d4;
  --primary-glow: rgba(6, 182, 212, 0.4);
  --secondary: #8b5cf6;
  --secondary-glow: rgba(139, 92, 246, 0.4);
  --accent: #10b981;
  --accent-glow: rgba(16, 185, 129, 0.4);
  --text: #f8fafc;
  --text-dim: #94a3b8;
  --glass: rgba(15, 23, 42, 0.6);
  --border: rgba(255, 255, 255, 0.1);
  --card-bg: #1e293b;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

.wrap { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Navigation */
.topnav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--glass);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.25rem;
}
.brand svg { width: 32px; height: 32px; }
.nav-menu { display: flex; gap: 32px; list-style: none; }
.nav-link {
  text-decoration: none;
  color: var(--text-dim);
  font-weight: 500;
  transition: 0.3s;
  font-size: 0.95rem;
}
.nav-link:hover, .nav-link.active { color: var(--primary); }
.nav-toggle { display: none; background: none; border: none; color: var(--text); cursor: pointer; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  cursor: pointer;
  transition: 0.3s;
  border: none;
  font-size: 1rem;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  box-shadow: 0 4px 15px var(--primary-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--primary-glow);
}
.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-outline:hover { background: rgba(255,255,255,0.05); }

/* Hero */
.hero {
  padding: 100px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
  z-index: -1;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(6, 182, 212, 0.1);
  color: var(--primary);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}
.hero-h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  line-height: 1.1;
  margin-bottom: 24px;
  background: linear-gradient(to right, #fff, var(--text-dim));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-p {
  font-size: 1.25rem;
  color: var(--text-dim);
  max-width: 600px;
  margin: 0 auto 40px;
}

/* Sections */
.sec { padding: 80px 0; }
.sec-title {
  text-align: center;
  font-size: 2.25rem;
  margin-bottom: 16px;
}
.sec-sub {
  text-align: center;
  color: var(--text-dim);
  max-width: 700px;
  margin: 0 auto 50px;
}

/* Features */
.feat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feat-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 40px;
  border-radius: 24px;
  transition: 0.3s;
}
.feat-card:hover {
  border-color: var(--primary);
  transform: translateY(-5px);
  background: rgba(15, 23, 42, 0.8);
}
.feat-ico {
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
  color: var(--primary);
}
.feat-name { font-size: 1.5rem; margin-bottom: 12px; }
.feat-desc { color: var(--text-dim); font-size: 0.95rem; }

/* Platforms */
.plat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}
.plat-card {
  background: var(--glass);
  border: 1px solid var(--border);
  padding: 30px;
  border-radius: 20px;
  text-align: center;
}
.plat-card svg { width: 40px; height: 40px; margin-bottom: 16px; color: var(--text-dim); }
.plat-name { font-weight: 600; margin-bottom: 8px; }
.plat-btn { margin-top: 16px; width: 100%; }

/* Deep Dive */
.deep-row {
  display: flex;
  align-items: center;
  gap: 60px;
  margin-bottom: 80px;
}
.deep-row.rev { flex-direction: row-reverse; }
.deep-info { flex: 1; }
.deep-vis {
  flex: 1;
  background: linear-gradient(135deg, var(--bg-alt), #1e1b4b);
  border-radius: 30px;
  padding: 40px;
  border: 1px solid var(--border);
}
.deep-title { font-size: 2rem; margin-bottom: 20px; }
.deep-p { color: var(--text-dim); margin-bottom: 24px; }

/* Reviews */
.rev-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.rev-card {
  background: var(--bg-alt);
  padding: 30px;
  border-radius: 20px;
  border: 1px solid var(--border);
}
.rev-stars { color: #fbbf24; margin-bottom: 16px; }
.rev-text { font-style: italic; color: var(--text-dim); margin-bottom: 20px; }
.rev-author { font-weight: 600; display: flex; align-items: center; gap: 10px; }
.rev-avatar {
  width: 32px;
  height: 32px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: #fff;
}

/* Comparison */
.cmp-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 40px;
  background: var(--bg-alt);
  border-radius: 20px;
  overflow: hidden;
}
.cmp-table th, .cmp-table td {
  padding: 20px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.cmp-table th { background: rgba(255,255,255,0.05); color: var(--primary); }
.cmp-hl { color: var(--primary); font-weight: 700; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}
.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.1rem;
}
.faq-q::after {
  content: "+";
  font-size: 1.5rem;
  color: var(--primary);
  transition: 0.3s;
}
.faq-item.open .faq-q::after { transform: rotate(45deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: 0.3s;
  color: var(--text-dim);
}
.faq-item.open .faq-a { max-height: 200px; padding-top: 16px; }

/* Footer */
.site-footer {
  padding: 60px 0;
  border-top: 1px solid var(--border);
  text-align: center;
  background: #020617;
}
.footer-sec-line { color: var(--accent); margin-bottom: 10px; font-weight: 600; }
.footer-note { color: var(--text-dim); font-size: 0.85rem; }

/* Animations */
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

@media (max-width: 992px) {
  .feat-grid, .rev-grid { grid-template-columns: repeat(2, 1fr); }
  .plat-grid { grid-template-columns: repeat(2, 1fr); }
  .deep-row, .deep-row.rev { flex-direction: column; text-align: center; }
}

/* Article Layout */
.art-layout {
  display: flex;
  gap: 40px;
  margin-top: 40px;
}
.art-body { flex: 1; }
.sidebar { width: 320px; flex-shrink: 0; }
.sbox {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 24px;
  margin-bottom: 24px;
  position: sticky;
  top: 92px;
}
.sbox-title { font-size: 1.1rem; margin-bottom: 16px; border-bottom: 1px solid var(--border); padding-bottom: 8px; }
.kw-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.kw-tag {
  background: rgba(255,255,255,0.05);
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.art-section { margin-bottom: 40px; }
.art-section h2 { font-size: 1.75rem; margin-bottom: 16px; color: var(--primary); }
.art-section p { margin-bottom: 16px; color: var(--text-dim); }
.art-list { margin-bottom: 16px; padding-left: 20px; color: var(--text-dim); }
.art-list li { margin-bottom: 8px; }

.cta-block {
  background: linear-gradient(135deg, var(--bg-alt), #1e1b4b);
  padding: 40px;
  border-radius: 24px;
  text-align: center;
  border: 1px solid var(--primary);
  margin: 40px 0;
}

@media (max-width: 992px) {
  .art-layout { flex-direction: column; }
  .sidebar { width: 100%; }
  .sbox { position: static; }
}