:root {
  --bg: #0b0f19;
  --bg-card: #121829;
  --bg-card-hover: #1a2236;
  --text: #e8edf5;
  --text-muted: #8b95a8;
  --primary: #3b82f6;
  --primary-light: #60a5fa;
  --accent: #10b981;
  --border: rgba(255, 255, 255, 0.08);
  --gradient: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #10b981 100%);
  --radius: 12px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }

a { color: var(--primary-light); text-decoration: none; transition: color 0.2s; }
a:hover { color: #93c5fd; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 20px; border-radius: 8px; font-weight: 600;
  border: 2px solid transparent; cursor: pointer; transition: all 0.2s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-light); color: #fff; }
.btn-outline { border-color: var(--border); color: var(--text); background: transparent; }
.btn-outline:hover { border-color: var(--primary); color: var(--primary-light); }
.btn-sm { padding: 6px 14px; font-size: 14px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(11, 15, 25, 0.85); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 8px; color: var(--text); }
.brand-icon { font-size: 24px; }
.brand-text { font-size: 20px; font-weight: 700; }
.brand-sub { font-size: 12px; color: var(--text-muted); margin-left: 4px; }
.nav { display: flex; align-items: center; gap: 24px; }
.nav a { color: var(--text-muted); font-size: 14px; }
.nav a:hover { color: var(--text); }

.hero { padding: 80px 0 60px; }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.hero-badge {
  display: inline-block; padding: 4px 12px; border-radius: 20px;
  background: rgba(59, 130, 246, 0.15); color: var(--primary-light);
  font-size: 13px; margin-bottom: 16px;
}
.hero h1 { font-size: 42px; line-height: 1.2; margin-bottom: 16px; }
.gradient-text { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-desc { color: var(--text-muted); font-size: 16px; margin-bottom: 28px; max-width: 520px; }
.hero-actions { display: flex; gap: 12px; margin-bottom: 36px; }
.hero-stats { display: flex; gap: 32px; }
.hero-stats strong { display: block; font-size: 28px; color: var(--primary-light); }
.hero-stats span { font-size: 13px; color: var(--text-muted); }

.hero-visual { display: flex; flex-direction: column; gap: 16px; }
.product-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px 24px; box-shadow: var(--shadow);
  transition: transform 0.2s, border-color 0.2s;
}
.product-card:hover { transform: translateX(4px); border-color: rgba(59, 130, 246, 0.3); }
.product-card h3 { font-size: 16px; margin-bottom: 4px; }
.product-card p { font-size: 13px; color: var(--text-muted); margin-bottom: 8px; }
.product-card a { font-size: 13px; }
.card-web { border-left: 3px solid var(--primary); }
.card-ext { border-left: 3px solid #8b5cf6; }
.card-desktop { border-left: 3px solid var(--accent); }

.section { padding: 64px 0; }
.section-title { font-size: 32px; text-align: center; margin-bottom: 8px; }
.section-sub { text-align: center; color: var(--text-muted); margin-bottom: 40px; }

.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-item {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px; transition: all 0.2s;
}
.product-item:hover { background: var(--bg-card-hover); border-color: rgba(59, 130, 246, 0.2); }
.product-item.featured { border-color: var(--accent); box-shadow: 0 0 24px rgba(16, 185, 129, 0.1); }
.product-icon { font-size: 32px; margin-bottom: 12px; }
.product-item h3 { font-size: 18px; margin-bottom: 12px; }
.product-item ul { list-style: none; margin-bottom: 16px; }
.product-item li {
  font-size: 14px; color: var(--text-muted); padding: 4px 0 4px 16px;
  position: relative;
}
.product-item li::before { content: "·"; position: absolute; left: 0; color: var(--primary); }
.link-arrow { font-size: 14px; font-weight: 600; }

.features { background: rgba(255, 255, 255, 0.02); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
}
.feature-card h4 { font-size: 16px; margin-bottom: 8px; color: var(--primary-light); }
.feature-card p { font-size: 14px; color: var(--text-muted); }

.workflow-steps { display: flex; align-items: center; justify-content: center; gap: 8px; flex-wrap: wrap; }
.step { text-align: center; }
.step span {
  display: inline-flex; width: 40px; height: 40px; align-items: center; justify-content: center;
  border-radius: 50%; background: var(--primary); color: #fff; font-weight: 700; margin-bottom: 8px;
}
.step p { font-size: 13px; color: var(--text-muted); }
.step_status-arrow { color: var(--text-muted); font-size: 20px; }
.step-arrow { color: var(--text-muted); font-size: 20px; }

.sub-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; max-width: 640px; margin: 0 auto; }
.sub-card {
  display: block; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px; color: var(--text); transition: all 0.2s;
}
.sub-card:hover { border-color: var(--primary); transform: translateY(-2px); color: var(--text); }
.sub-icon { font-size: 28px; display: block; margin-bottom: 8px; }
.sub-card h4 { margin-bottom: 4px; }
.sub-card p { font-size: 13px; color: var(--text-muted); }

.site-footer {
  border-top: 1px solid var(--border); padding: 32px 0; margin-top: 40px;
}
.footer-inner { text-align: center; }
.footer-inner p { font-size: 13px; color: var(--text-muted); }
.footer-links { margin-top: 8px; display: flex; gap: 16px; justify-content: center; }
.footer-links a { color: var(--text-muted); font-size: 13px; }

@media (max-width: 768px) {
  .hero-grid, .product-grid, .feature-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 28px; }
  .nav { gap: 12px; }
  .nav a:not(.btn) { display: none; }
  .sub-grid { grid-template-columns: 1fr; }
}