* {
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:system-ui, sans-serif;
  }
  html, body {
    overflow-x:hidden;
    scroll-behavior:auto; /* 禁用平滑滚动，更流畅 */
  }
  .container {
    max-width:1100px;
    margin:0 auto;
    padding:0 12px;
  }
  .topbar {
    background:#0277bd;
    color:#fff;
    padding:8px 0;
    text-align:center;
    font-size:13px;
  }
  .navbar {
    background:#0277bd;
    padding:12px 0;
  }
  .navbar .container {
    display:flex;
    flex-direction:column;
    gap:10px;
  }
  .logo {
    font-size:20px;
    font-weight:600;
    color:#fff;
  }
  .nav {
    list-style:none;
    display:flex;
    flex-wrap:wrap;
    gap:12px 16px;
  }
  .nav a {
    color:#fff;
    text-decoration:none;
    font-size:14px;
    white-space:nowrap;
  }
  .hero {
    background:#01579b;
    color:#fff;
    padding:40px 0;
    text-align:center;
  }
  .hero h1 {
    font-size:24px;
    margin-bottom:10px;
  }
  .search-box {
    max-width:600px;
    margin:20px auto 0;
    display:flex;
  }
  .search-box input {
    flex:1;
    padding:10px 14px;
    border:none;
    outline:0;
  }
  .search-box button {
    padding:10px 18px;
    background:#ff6d00;
    color:#fff;
    border:none;
    cursor:pointer;
  }
  .section {
    padding:30px 0;
  }
  .title {
    text-align:center;
    font-size:20px;
    margin-bottom:20px;
  }
  .product-grid {
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:14px;
  }
  @media(min-width:768px){
    .product-grid{grid-template-columns:repeat(4,1fr);}
  }
  .pcard {
    background:#fff;
    border:1px solid #eee;
    border-radius:6px;
    text-align:center;
    padding:10px;
  }
  .pcard img {
    width:100%;
    height:120px;
    object-fit:cover;
    background:#f5f5f5;
    margin-bottom:8px;
  }
  .pcard h3 {
    font-size:14px;
    margin-bottom:6px;
  }
  .price {
    font-size:13px;
    color:#d32f2f;
    margin-bottom:8px;
  }
  .btn {
    display:inline-block;
    padding:6px 12px;
    background:#0277bd;
    color:#fff;
    border-radius:4px;
    font-size:12px;
    text-decoration:none;
  }
  .footer {
    background:#263238;
    color:#fff;
    text-align:center;
    padding:20px 0;
    margin-top:20px;
    font-size:13px;
  }