* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Microsoft YaHei", sans-serif;
}
html, body {
  width: 100%;
  overflow-x: hidden;
}
body {
  background: #f4f9f6;
  color: #333;
}

/* ———— 顶部导航（大气·居中·自适应）———— */
.header {
  background: #0c6b44;
  width: 100%;
  padding: 20px 0;
}
.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
}
.logo {
  color: #fff;
  font-size: 24px;
  font-weight: bold;
}
.nav {
  list-style: none;
  display: flex;
  gap: 28px;
}
.nav a {
  color: #fff;
  text-decoration: none;
  font-size: 15px;
  padding: 8px 0;
}
.nav a:hover {
  color: #a8e6cf;
}

/* ————  Banner ———— */
.banner {
  width: 100%;
  height: 400px;
  background: linear-gradient(135deg, #0c6b44, #14a570);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #fff;
}
.banner-box h1 {
  font-size: 44px;
  margin-bottom: 15px;
}
.banner-box p {
  font-size: 18px;
  opacity: 0.95;
}

/* ———— 内容容器 ———— */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ———— 卡片模块 ———— */
.card {
  background: #fff;
  border-radius: 12px;
  padding: 40px;
  margin: 35px 0;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}
.title {
  font-size: 26px;
  color: #0c6b44;
  margin-bottom: 25px;
  padding-bottom: 10px;
  border-bottom: 2px solid #14a570;
}

/* ———— 产品布局 ———— */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
}
.product-item {
  text-align: center;
}
.product-item img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 12px;
}
.product-item strong {
  color: #0c6b44;
  font-size: 16px;
}

/* ———— 公司简介 ———— */
.intro {
  font-size: 16px;
  line-height: 1.9;
  color: #444;
}

/* ———— 联系卡片 ———— */
.contact {
  background: #e6f7ef;
  border-left: 4px solid #14a570;
  padding: 25px;
  border-radius: 8px;
  margin: 25px 0;
  font-size: 15px;
}

/* ———— 底部 ———— */
.footer {
  background: #0c6b44;
  color: #fff;
  text-align: center;
  padding: 30px 0;
  margin-top: 40px;
}

/* ———— 手机自适应 ———— */
@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    gap: 15px;
  }
  .nav {
    gap: 14px;
  }
  .banner {
    height: 260px;
  }
  .banner-box h1 {
    font-size: 28px;
  }
  .product-grid {
    grid-template-columns: 1fr;
  }
  .card {
    padding: 25px;
  }
}