/* 青头菌 - 青色+大地色主题，野生菌风格 */
:root {
  --primary: #3a7d44;
  --primary-light: #5a9d64;
  --secondary: #8B6914;
  --accent: #2E5A1C;
  --bg: #f5f7f2;
  --bg-alt: #e8efe3;
  --text: #2c2c2c;
  --text-light: #555;
  --white: #ffffff;
  --border: #d4dcc8;
  --earth: #6b4c2a;
  --earth-light: #8B6914;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: var(--white);
  padding: 30px 0;
  text-align: center;
}

.site-header .logo {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.site-header .tagline {
  font-size: 1rem;
  opacity: 0.9;
}

/* Nav */
.main-nav {
  background: var(--earth);
  position: sticky;
  top: 0;
  z-index: 100;
}

.main-nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 30px;
  padding: 12px 0;
}

.main-nav a {
  color: var(--white);
  text-decoration: none;
  font-size: 0.95rem;
  transition: opacity 0.3s;
}

.main-nav a:hover { opacity: 0.8; }

/* Hero */
.hero {
  background: linear-gradient(to bottom, var(--bg-alt), var(--bg));
  padding: 60px 0;
  border-bottom: 3px solid var(--primary-light);
}

.hero .container {
  display: flex;
  align-items: center;
  gap: 40px;
}

.hero-content { flex: 1; }

.hero-content h2 {
  font-size: 2.2rem;
  color: var(--primary);
  margin-bottom: 15px;
}

.hero-content p {
  font-size: 1.05rem;
  color: var(--text-light);
  margin-bottom: 20px;
}

.hero-image {
  flex-shrink: 0;
  width: 160px;
  height: 160px;
  background: var(--primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
}

.btn {
  display: inline-block;
  background: var(--primary);
  color: var(--white);
  padding: 12px 30px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  transition: background 0.3s;
}

.btn:hover { background: var(--accent); }

/* Features */
.features { padding: 50px 0; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 25px;
}

.feature-card {
  background: var(--white);
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  border: 1px solid var(--border);
  transition: box-shadow 0.3s;
}

.feature-card:hover {
  box-shadow: 0 4px 20px rgba(58,125,68,0.15);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 15px;
}

.feature-card h3 {
  color: var(--primary);
  margin-bottom: 10px;
}

/* Products */
.products {
  background: var(--bg-alt);
  padding: 50px 0;
  border-top: 2px solid var(--border);
  border-bottom: 2px solid var(--border);
}

.section-title {
  text-align: center;
  font-size: 1.8rem;
  color: var(--primary);
  margin-bottom: 35px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 25px;
}

.product-card {
  background: var(--white);
  padding: 25px;
  border-radius: 10px;
  text-align: center;
  border: 1px solid var(--border);
}

.product-img {
  font-size: 3.5rem;
  margin-bottom: 15px;
}

.product-card h3 {
  color: var(--text);
  margin-bottom: 8px;
}

.price {
  font-size: 1.3rem;
  color: var(--primary);
  font-weight: 700;
  margin: 10px 0;
}

.desc {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 15px;
}

.btn-small {
  display: inline-block;
  background: var(--secondary);
  color: var(--white);
  padding: 8px 20px;
  border-radius: 5px;
  text-decoration: none;
  font-size: 0.9rem;
  transition: background 0.3s;
}

.btn-small:hover { background: var(--earth); }

/* About */
.about { padding: 50px 0; }

.about-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.about-content p {
  color: var(--text-light);
  margin-bottom: 15px;
  font-size: 1rem;
}

/* Footer */
.site-footer {
  background: var(--earth);
  color: var(--white);
  padding: 40px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
  margin-bottom: 30px;
}

.footer-col h4 {
  margin-bottom: 15px;
  color: #c9a96e;
}

.footer-col p,
.footer-col li {
  font-size: 0.9rem;
  opacity: 0.85;
  margin-bottom: 8px;
  list-style: none;
}

.footer-col a {
  color: var(--white);
  text-decoration: none;
  opacity: 0.85;
}

.footer-col a:hover { opacity: 1; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding: 15px 0;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.7;
}

/* Responsive */
@media (max-width: 768px) {
  .hero .container { flex-direction: column; text-align: center; }
  .hero-image { width: 120px; height: 120px; font-size: 3.5rem; }
  .hero-content h2 { font-size: 1.6rem; }
  .main-nav ul { gap: 15px; flex-wrap: wrap; justify-content: center; }
  .site-header .logo { font-size: 1.5rem; }
}