/* 基础样式 */
body {
  margin: 0;
  font-family: 'Segoe UI', Arial, sans-serif;
  background: linear-gradient(135deg, #eaf3fb 0%, #ffffff 100%);
  color: #1a2a3a;
}
header {
  background: #fff;
  box-shadow: 0 2px 12px rgba(0,120,215,0.06);
  border-bottom: 2px solid #e3eaf2;
}
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.5rem 1.5rem;
}
.logo {
  display: flex;
  align-items: center;
}
.logo img {
  height: 48px;
  margin-right: 14px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,120,215,0.08);
}
.logo span {
  font-size: 1.5rem;
  font-weight: bold;
  color: #0078d7;
  letter-spacing: 1px;
}
.nav-links {
  list-style: none;
  display: flex;
  gap: 2rem;
  margin: 0;
  padding: 0;
}
.nav-links a {
  text-decoration: none;
  color: #1a2a3a;
  font-weight: 500;
  font-size: 1.08rem;
  padding: 0.2rem 0.7rem;
  border-radius: 4px;
  transition: background 0.2s, color 0.2s;
}
.nav-links a:hover {
  background: #eaf3fb;
  color: #0078d7;
}
.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.lang-switch button {
  background: #fff;
  border: 1.5px solid #0078d7;
  color: #0078d7;
  font-weight: bold;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1rem;
  padding: 0.2rem 0.8rem;
  margin: 0 2px;
  transition: background 0.2s, color 0.2s;
}
.lang-switch button:hover {
  background: #0078d7;
  color: #fff;
}
main {
  max-width: 1200px;
  margin: 2.5rem auto 0 auto;
  padding: 0 1.5rem;
}
.hero {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  background: linear-gradient(120deg, #eaf3fb 60%, #fafdff 100%);
  border-radius: 18px;
  padding: 2.5rem 2rem 2rem 2rem;
  margin-bottom: 2.5rem;
  box-shadow: 0 4px 24px rgba(0,120,215,0.07);
  border: 1.5px solid #e3eaf2;
}
.hero-text {
  flex: 1 1 300px;
  min-width: 250px;
}
.hero-text h1 {
  font-size: 2.5rem;
  color: #0078d7;
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: 1px;
}
.hero-text p {
  font-size: 1.25rem;
  color: #1a2a3a;
  margin-bottom: 1.5rem;
}
.hero-slider {
  flex: 1 1 320px;
  min-width: 260px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,120,215,0.08);
  margin-left: 2rem;
  padding: 1.2rem 0.8rem;
}
.hero-slider img {
  width: 100%;
  max-width: 320px;
  height: auto;
  border-radius: 10px;
  display: none;
  box-shadow: 0 2px 12px rgba(0,120,215,0.10);
  border: 1.5px solid #e3eaf2;
}
.hero-slider img.active {
  display: block;
}
.slider-controls {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
}
.slider-controls .dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #c2d8ee;
  border: 2px solid #0078d7;
  cursor: pointer;
  transition: background 0.2s, border 0.2s;
}
.slider-controls .dot.active {
  background: #0078d7;
  border: 2px solid #005fa3;
}
.about, .featured-products, .products {
  background: #fff;
  border-radius: 14px;
  padding: 2.2rem 2rem;
  margin-bottom: 2.5rem;
  box-shadow: 0 2px 12px rgba(0,120,215,0.05);
  border: 1.5px solid #e3eaf2;
}
.about h2, .featured-products h2, .products h1, .products h2 {
  color: #0078d7;
  font-weight: 700;
  margin-bottom: 1.2rem;
  letter-spacing: 0.5px;
}
.featured-products .product-list,
.products .product-list {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
  justify-content: center;
}
.product-card {
  background: linear-gradient(120deg, #fafdff 60%, #eaf3fb 100%);
  border-radius: 10px;
  box-shadow: 0 2px 12px rgba(0,120,215,0.07);
  padding: 1.5rem 1rem;
  width: 280px;
  text-align: center;
  transition: box-shadow 0.2s, transform 0.2s;
  border: 1.5px solid #e3eaf2;
}
.product-card:hover {
  box-shadow: 0 8px 32px rgba(0,120,215,0.13);
  transform: translateY(-4px) scale(1.03);
}
.product-card img {
  width: 100%;
  max-width: 200px;
  height: auto;
  margin-bottom: 1.2rem;
  border-radius: 8px;
  border: 1.5px solid #e3eaf2;
  box-shadow: 0 2px 8px rgba(0,120,215,0.08);
}
footer {
  text-align: center;
  padding: 2rem 0 1.2rem 0;
  color: #7a8ca3;
  font-size: 1.05rem;
  background: #fafdff;
  border-top: 2px solid #e3eaf2;
  margin-top: 2rem;
}
.contact-info {
  list-style: none;
  padding: 0;
}
.contact-info li {
  margin-bottom: 0.7rem;
  font-size: 1.08rem;
}
/* 预留：商务亮点、合作伙伴、参数表、客户评价等区块样式 */
.section-business, .section-partners, .section-testimonials, .section-specs {
  background: #fff;
  border-radius: 14px;
  padding: 2.2rem 2rem;
  margin-bottom: 2.5rem;
  box-shadow: 0 2px 12px rgba(0,120,215,0.05);
  border: 1.5px solid #e3eaf2;
}
.section-title {
  color: #0078d7;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
  letter-spacing: 0.5px;
  text-align: center;
}
@media (max-width: 900px) {
  .navbar, main {
    max-width: 100%;
  }
  .hero {
    flex-direction: column;
    padding: 1.5rem 0.5rem;
  }
  .featured-products .product-list,
  .products .product-list {
    gap: 1.2rem;
  }
}
@media (max-width: 600px) {
  .navbar {
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.5rem 0.2rem;
  }
  .nav-links {
    gap: 1rem;
  }
  .hero {
    padding: 1rem 0.2rem;
  }
  .about, .featured-products, .products, .section-business, .section-partners, .section-testimonials, .section-specs {
    padding: 1rem 0.5rem;
  }
  .product-card {
    width: 100%;
    max-width: 320px;
  }
}