body {
  font-family: 'Segoe UI', 'Arial', sans-serif;
  margin: 0;
  background: #f0f4fa;
  color: #222;
  font-size: 22px;
}
nav {
  background: linear-gradient(90deg, #1976d2 0%, #ff9800 100%);
  color: #fff;
  padding: 24px 0 24px 32px;
  display: flex;
  gap: 32px;
  font-size: 28px;
  font-weight: bold;
  box-shadow: 0 4px 16px #0002;
  position: sticky;
  top: 0;
  z-index: 1000;
}
nav > div {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
  width: 100%;
}
nav a {
  color: #fff;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 28px;
  margin-right: 24px;
  text-decoration: none;
  transition: color 0.2s, text-shadow 0.2s;
  text-shadow: 1px 2px 8px #0005;
  white-space: nowrap;
  padding: 8px 12px;
  border-radius: 6px;
}
nav a:hover {
  color: #ffeb3b;
  text-shadow: 2px 4px 12px #1976d2;
  background: rgba(255,255,255,0.1);
}
main {
  padding: 40px 5vw 40px 5vw;
  max-width: 1400px;
  margin: 0 auto;
}
.page {
  min-height: 60vh;
  display: block;
}
.product-list {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  justify-content: flex-start;
}
.product-card {
  background: linear-gradient(135deg, #fff 60%, #e3f2fd 100%);
  border-radius: 18px;
  box-shadow: 0 6px 24px #1976d255, 0 1.5px 6px #ff980055;
  padding: 32px 24px 24px 24px;
  width: 320px;
  text-align: center;
  transition: transform 0.2s, box-shadow 0.2s;
  font-size: 22px;
}
.product-card:hover {
  transform: translateY(-8px) scale(1.03);
  box-shadow: 0 12px 36px #1976d299, 0 3px 12px #ff980099;
}
.product-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 12px;
  margin-bottom: 18px;
  box-shadow: 0 2px 12px #0002;
}
.product-card h2 {
  font-size: 28px;
  margin: 12px 0 8px 0;
  color: #1976d2;
  font-weight: bold;
  letter-spacing: 1px;
}
.product-card p {
  font-size: 20px;
  color: #444;
  margin: 8px 0 0 0;
}
.product-card .price {
  color: #ff9800;
  font-weight: bold;
  font-size: 26px;
  margin-top: 16px;
  letter-spacing: 1px;
  text-shadow: 1px 2px 8px #1976d2aa;
}

/* 响应式设计 */
@media (max-width: 1200px) {
  nav {
    padding: 20px 0 20px 20px;
    gap: 20px;
  }
  nav > div {
    gap: 20px;
  }
  nav a {
    font-size: 24px;
    margin-right: 16px;
    padding: 6px 10px;
  }
}

@media (max-width: 900px) {
  body {
    font-size: 18px;
  }
  nav {
    padding: 12px 0 12px 12px;
    gap: 12px;
    font-size: 18px;
  }
  nav > div {
    gap: 12px;
    flex-direction: row;
    align-items: center;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }
  nav > div::-webkit-scrollbar {
    display: none;
  }
  nav a {
    font-size: 16px;
    margin-right: 8px;
    margin-bottom: 0;
    padding: 6px 10px;
    width: auto;
    text-align: center;
    border-radius: 6px;
    flex-shrink: 0;
  }
  nav a:hover {
    background: rgba(255,255,255,0.2);
  }
  .product-card {
    width: 90vw;
    max-width: 340px;
    padding: 18px 8px 18px 8px;
  }
  main {
    padding: 18px 2vw 18px 2vw;
  }
}

@media (max-width: 600px) {
  nav {
    padding: 8px 0 8px 8px;
  }
  nav > div {
    gap: 8px;
  }
  nav a {
    font-size: 14px;
    padding: 4px 8px;
    margin-right: 6px;
  }
  .product-card {
    width: 95vw;
    padding: 16px 6px 16px 6px;
  }
  main {
    padding: 12px 1vw 12px 1vw;
  }
}