/* 鹏奕科技风格 - 产品体验主页 */
:root {
  --bg-dark: #0a0e17;
  --bg-card: #111827;
  --bg-card-hover: #1a2332;
  --primary: #0ea5e9;
  --primary-light: #38bdf8;
  --accent: #06b6d4;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --border: rgba(148, 163, 184, 0.12);
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
  --font: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg-dark);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 14, 23, 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 {
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text);
  text-decoration: none;
  transition: color 0.2s;
}

.brand:hover {
  color: var(--primary-light);
}

.nav {
  display: flex;
  gap: 28px;
}

.nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* Hero */
.hero {
  position: relative;
  padding: 140px 0 100px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(14, 165, 233, 0.2), transparent),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(6, 182, 212, 0.1), transparent);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  text-align: center;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #fff 0%, var(--primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 480px;
  margin: 0 auto;
}

/* Section */
.section-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 32px;
  color: var(--text);
}

/* Product Grid */
.products {
  padding: 60px 0 80px;
}

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

.product-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: rgba(14, 165, 233, 0.35);
  box-shadow: var(--shadow);
  background: var(--bg-card-hover);
}

.product-card:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.product-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.2), rgba(6, 182, 212, 0.2));
  border-radius: 10px;
  margin-bottom: 16px;
  font-size: 1.5rem;
}

.product-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.product-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.5;
}

.product-card .link-hint {
  font-size: 0.85rem;
  color: var(--primary-light);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.product-card:hover .link-hint {
  color: var(--primary);
}

/* About */
.about {
  padding: 48px 0 64px;
  border-top: 1px solid var(--border);
}

.about-desc {
  color: var(--text-muted);
  max-width: 560px;
  font-size: 1rem;
}

/* Footer */
.footer {
  padding: 24px 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

@media (max-width: 640px) {
  .nav {
    gap: 16px;
  }
  .hero {
    padding: 120px 0 80px;
  }
  .product-grid {
    grid-template-columns: 1fr;
  }
}