.site-header {
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-nav a {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
}
.site-nav a:hover { color: var(--text-primary); }

.hero {
  padding: 104px 0 60px;
}
.hero-inner {
  max-width: 700px;
}
.hero-title {
  font-size: 54px;
  margin: 24px 0 20px;
  letter-spacing: -0.03em;
}
.hero-title .accent {
  background: linear-gradient(90deg, var(--blue-bright), #8fb0ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  font-size: 17.5px;
  max-width: 540px;
  margin-bottom: 34px;
  line-height: 1.65;
}
.hero-actions { display: flex; gap: 12px; }

.preview-section { padding: 8px 0 88px; }

.preview-panel {
  background: linear-gradient(180deg, var(--surface), var(--bg-raised));
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card), 0 0 0 1px rgba(59,111,237,0.06);
  overflow: hidden;
  position: relative;
}
.preview-panel::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(91,139,255,0.6), transparent);
}
.preview-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 22px;
  border-bottom: 1px solid var(--border);
}
.preview-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.preview-status {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  font-family: var(--font-data);
  color: var(--confidence-high);
}
.dot.pulse { animation: pulse 1.6s ease-in-out infinite; }
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.25; }
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.preview-field {
  padding: 22px;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.preview-field:last-child { border-right: none; }
.preview-field-label {
  font-size: 12px;
  color: var(--text-tertiary);
}
.preview-field-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  transition: opacity 0.3s ease;
}

.benefits-section { padding: 8px 0 100px; }
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.benefit {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: rgba(19, 27, 48, 0.4);
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.benefit:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}
.benefit-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--blue-dim);
  color: var(--blue-bright);
  margin-bottom: 18px;
}
.benefit h3 { font-size: 17px; margin-bottom: 10px; }
.benefit p { font-size: 14px; line-height: 1.65; }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0 40px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-tertiary);
}

@media (max-width: 860px) {
  .hero-title { font-size: 38px; }
  .preview-grid { grid-template-columns: repeat(2, 1fr); }
  .preview-field:nth-child(2) { border-right: none; }
  .preview-field { border-bottom: 1px solid var(--border); }
  .benefits-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; gap: 6px; }
}

@media (max-width: 480px) {
  .hero { padding: 64px 0 40px; }
  .hero-title { font-size: 30px; }
  .hero-sub { font-size: 15.5px; }
  .hero-actions .btn { width: 100%; }
  .preview-grid { grid-template-columns: 1fr; }
  .preview-field { border-right: none !important; }
}