* {
  margin:0;
  padding:0;
  box-sizing:border-box;
  font-family: 'Segoe UI', Roboto, sans-serif;
}
body {
  background:#fdfdfd;
  color:#222;
  line-height:1.6;
}
/* 导航 */
.site-header {
  border-bottom:1px solid #eee;
  padding:18px 30px;
}
.header-inner {
  max-width:1400px;
  margin:0 auto;
  display:flex;
  justify-content:space-between;
  align-items:center;
}
.brand-name {
  font-size:26px;
  font-weight:500;
  color:#222;
  text-decoration:none;
  letter-spacing:1px;
}
.main-nav a {
  margin-left:28px;
  color:#444;
  text-decoration:none;
  font-size:16px;
}
.main-nav a:hover {
  color:#888;
}
/* 首页标题区 */
.hero {
  text-align:center;
  padding:60px 20px;
}
.hero h1 {
  font-size:38px;
  font-weight:400;
  margin-bottom:12px;
}
.hero p {
  color:#666;
  font-size:17px;
}
/* 产品网格 */
.product-container {
  max-width:1400px;
  margin:0 auto;
  padding:0 30px 60px;
  display:grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap:32px;
}
.product-card {
  background:#fff;
  border:1px solid #eee;
  border-radius:8px;
  overflow:hidden;
  transition:0.2s ease;
}
.product-card:hover {
  box-shadow:0 4px 12px rgba(0,0,0,0.08);
}
.product-card img {
  width:100%;
  aspect-ratio:1/1;
  object-fit:cover;
  display:block;
}
.sku {
  padding:14px;
  text-align:center;
  color:#333;
  font-size:15px;
}
/* 页脚 */
.site-footer {
  background:#1f1f1f;
  color:#ccc;
  padding:50px 30px;
}
.footer-wrap {
  max-width:1400px;
  margin:0 auto;
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:40px;
}
.footer-col h3 {
  color:#fff;
  font-weight:400;
  margin-bottom:16px;
  font-size:20px;
}
.footer-col p {
  margin-bottom:8px;
  font-size:15px;
}
.copyright {
  max-width:1400px;
  margin:40px auto 0;
  padding-top:20px;
  border-top:#333 solid 1px;
  font-size:14px;
  color:#888;
}
/* 移动端适配 */
@media (max-width:768px){
  .header-inner {
    flex-direction:column;
    gap:12px;
  }
  .main-nav a {
    margin:0 12px;
  }
  .hero h1 {
    font-size:28px;
  }
  .footer-wrap {
    grid-template-columns:1fr;
  }
}