* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: "Microsoft YaHei", "SimSun", serif; color: #333; background: #f5faf5; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header { background: #2e7d32; color: #fff; padding: 40px 0 30px; text-align: center; }
.logo { font-size: 2.5rem; font-weight: bold; color: #fff; }
.subtitle { font-size: 1.1rem; margin-top: 10px; color: #e8f5e9; }

/* Nav */
.main-nav { background: #1b5e20; }
.main-nav ul { list-style: none; display: flex; justify-content: center; flex-wrap: wrap; gap: 30px; padding: 12px 0; }
.main-nav a { color: #fff; text-decoration: none; font-size: 1rem; }
.main-nav a:hover { color: #c8e6c9; }

/* Hero */
.hero { background: linear-gradient(135deg, #2e7d32, #43a047); color: #fff; text-align: center; padding: 80px 0; }
.hero h2 { font-size: 2.5rem; margin-bottom: 15px; }
.hero p { font-size: 1.2rem; color: #e8f5e9; }

/* Section Title */
.section-title { text-align: center; font-size: 1.8rem; color: #2e7d32; margin: 50px 0 30px; }
.section-title::after { content: ""; display: block; width: 60px; height: 3px; background: #2e7d32; margin: 10px auto 0; }

/* Products */
.products { padding: 30px 0 60px; }
.product-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 25px; }
.product-card { background: #fff; border-radius: 12px; padding: 25px; text-align: center; box-shadow: 0 4px 15px rgba(0,0,0,0.08); transition: transform 0.3s; border: 2px solid #e8f5e9; }
.product-card:hover { transform: translateY(-5px); border-color: #2e7d32; }
.product-img { width: 100%; height: 140px; background: linear-gradient(135deg, #2e7d32, #81c784); border-radius: 10px; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 1.3rem; margin-bottom: 15px; }
.product-card h4 { color: #2e7d32; margin-bottom: 8px; }
.product-card p { color: #777; font-size: 0.95rem; }

/* Features */
.features { background: #fff; padding: 50px 0; border-top: 3px solid #2e7d32; }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 30px; text-align: center; }
.feature-item h4 { font-size: 1.3rem; color: #2e7d32; margin-bottom: 8px; }
.feature-item p { color: #555; }

/* Footer */
.site-footer { background: #1b5e20; color: #e8f5e9; text-align: center; padding: 25px 0; font-size: 0.9rem; }

@media (max-width: 768px) {
  .logo { font-size: 1.8rem; }
  .hero { padding: 50px 0; }
  .hero h2 { font-size: 1.8rem; }
  .main-nav ul { gap: 15px; }
}