* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", Arial, sans-serif;
  color: #222;
  background: #f7f8fc;
}

a {
  text-decoration: none;
  color: inherit;
}

.container {
  width: min(1200px, calc(100% - 40px));
  margin: 0 auto;
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(18, 20, 45, 0.78);
  backdrop-filter: blur(10px);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo img {
  width: 48px;
  height: 48px;
  object-fit: contain;
}

.logo-text h1 {
  margin: 0;
  font-size: 18px;
  color: #fff;
}

.logo-text p {
  margin: 2px 0 0;
  font-size: 12px;
  color: rgba(255,255,255,0.75);
}

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

.nav a {
  color: rgba(255,255,255,0.9);
  font-size: 15px;
  padding-bottom: 4px;
}

.nav a.active,
.nav a:hover {
  color: #d5a8ff;
  border-bottom: 2px solid #d5a8ff;
}

.hero {
  position: relative;
  min-height: 100vh;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  padding-top: 84px;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10,12,40,0.25), rgba(18,20,45,0.58));
}

.hero-content {
  position: relative;
  z-index: 2;
  color: #fff;
  padding: 80px 0;
}

.hero-sub {
  font-size: 22px;
  margin-bottom: 20px;
  line-height: 1.8;
}

.hero h2 {
  font-size: 54px;
  margin: 0 0 18px;
}

.hero-desc {
  max-width: 680px;
  font-size: 18px;
  line-height: 1.9;
  color: rgba(255,255,255,0.88);
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-top: 28px;
}

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 15px;
}

.btn-primary {
  background: linear-gradient(135deg, #7b2cff, #ff4fd8);
  color: #fff;
}

.btn-secondary {
  border: 1px solid rgba(255,255,255,0.6);
  color: #fff;
}

.section {
  padding: 72px 0;
  background: #fff;
}

.section-alt {
  background: #f3f5fb;
}

.section-title {
  text-align: center;
  margin-bottom: 34px;
}

.section-title h3 {
  margin: 0 0 10px;
  font-size: 30px;
}

.section-title p {
  margin: 0;
  color: #666;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.card, .product-item {
  background: #fff;
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 10px 28px rgba(0,0,0,0.06);
}

.card h4, .product-item h4 {
  margin-top: 0;
  font-size: 20px;
}

.product-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.contact-card p {
  margin: 10px 0;
  line-height: 1.8;
}

.footer {
  background: #11162b;
  color: rgba(255,255,255,0.8);
  text-align: center;
  padding: 28px 0;
}

.footer p {
  margin: 8px 0;
}

.footer a {
  color: #d5a8ff;
}

@media (max-width: 900px) {
  .nav-wrap {
    flex-direction: column;
    gap: 14px;
  }

  .nav {
    justify-content: center;
    gap: 16px;
  }

  .hero h2 {
    font-size: 34px;
  }

  .hero-sub {
    font-size: 18px;
  }

  .card-grid,
  .product-list {
    grid-template-columns: 1fr;
  }
}