:root {
  --primary-color: #a81d24; /* 经典朱砂红/国风红 */
  --primary-dark: #7a1117;
  --accent-gold: #d4a359; /* 华贵琥珀金 */
  --accent-light-gold: #fcf6ec;
  --text-main: #2b2b2b;
  --text-muted: #666666;
  --bg-warm: #faf7f2;
  --bg-white: #ffffff;
  --border-color: #eedcc6;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 6px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 30px rgba(0,0,0,0.12);
  --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

body {
  font-family: var(--font-family);
  color: var(--text-main);
  background-color: var(--bg-warm);
  line-height: 1.6;
  overflow-x: hidden;
}

/* 导航条 */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: all 0.3s ease;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-badge {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: 6px;
  letter-spacing: 1px;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 18px;
  font-weight: bold;
  color: var(--primary-color);
  letter-spacing: 0.5px;
}

.brand-sub {
  font-size: 11px;
  color: var(--text-muted);
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-main);
  font-size: 15px;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--primary-color);
}

.nav-hotline {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-color);
  background: var(--accent-light-gold);
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid var(--border-color);
}

/* Hero 首屏 */
.hero-section {
  padding-top: 120px;
  padding-bottom: 80px;
  background: radial-gradient(circle at 80% 20%, rgba(212, 163, 89, 0.15) 0%, rgba(250, 247, 242, 1) 70%);
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 40px;
}

.hero-tag {
  display: inline-block;
  background: var(--primary-color);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 16px;
}

.hero-title {
  font-size: 40px;
  line-height: 1.25;
  color: #1a1a1a;
  margin-bottom: 16px;
  font-weight: 800;
}

.hero-title span {
  color: var(--primary-color);
}

.hero-desc {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 30px;
  line-height: 1.8;
}

.hero-badges {
  display: flex;
  gap: 16px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.badge-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  color: #444;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: 6px;
}

.badge-item i {
  color: var(--accent-gold);
}

.hero-actions {
  display: flex;
  gap: 16px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: #fff;
  padding: 12px 28px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(168, 29, 36, 0.3);
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(168, 29, 36, 0.4);
}

.btn-outline {
  background: #fff;
  color: var(--text-main);
  border: 1px solid #ccc;
  padding: 12px 24px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.2s;
}

.btn-outline:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.visual-card {
  position: relative;
  background: #fff;
  padding: 16px;
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  border: 2px solid var(--border-color);
  max-width: 480px;
  width: 100%;
}

.visual-card img {
  width: 100%;
  height: auto;
  border-radius: 10px;
  display: block;
}

.visual-badge {
  position: absolute;
  bottom: 24px;
  right: -12px;
  background: linear-gradient(135deg, #d4a359, #b58334);
  color: #fff;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: bold;
  box-shadow: var(--shadow-md);
}

/* 核心选材 Section */
.section {
  padding: 80px 24px;
}

.section-white {
  background: #ffffff;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 50px auto;
}

.section-subtitle {
  color: var(--accent-gold);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.section-title {
  font-size: 32px;
  font-weight: 800;
  color: #1a1a1a;
  margin-bottom: 14px;
}

.section-desc {
  color: var(--text-muted);
  font-size: 15px;
}

.ingredients-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 20px;
}

.ingredient-card {
  background: var(--bg-warm);
  border: 1px solid var(--border-color);
  padding: 24px 16px;
  border-radius: 12px;
  text-align: center;
  transition: transform 0.2s, box-shadow 0.2s;
}

.ingredient-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-gold);
}

.ingredient-icon {
  font-size: 28px;
  margin-bottom: 10px;
}

.ingredient-name {
  font-size: 17px;
  font-weight: bold;
  color: var(--primary-color);
  margin-bottom: 6px;
}

.ingredient-desc {
  font-size: 12px;
  color: var(--text-muted);
}

/* 产品参数与展示 Section */
.product-details {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.package-gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.gallery-item {
  background: #fff;
  border: 1px solid var(--border-color);
  padding: 10px;
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.gallery-item img {
  width: 100%;
  height: auto;
  border-radius: 6px;
  display: block;
}

.gallery-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 8px;
}

.specs-card {
  background: var(--bg-warm);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 28px;
}

.specs-title {
  font-size: 20px;
  font-weight: bold;
  color: var(--primary-color);
  margin-bottom: 18px;
  border-left: 4px solid var(--primary-color);
  padding-left: 10px;
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 20px;
  font-size: 14px;
}

.specs-table th, .specs-table td {
  padding: 10px 12px;
  border-bottom: 1px dashed var(--border-color);
  text-align: left;
}

.specs-table th {
  color: #666;
  width: 32%;
  font-weight: 500;
}

.specs-table td {
  color: #222;
  font-weight: 600;
}

/* 企业背书与资质 Section */
.cert-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.cert-card {
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 28px 20px;
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.cert-icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 16px auto;
  background: var(--accent-light-gold);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-gold);
  font-size: 24px;
}

.cert-name {
  font-size: 17px;
  font-weight: bold;
  color: #1a1a1a;
  margin-bottom: 8px;
}

.cert-no {
  font-size: 13px;
  color: var(--primary-color);
  font-family: monospace;
  font-weight: 600;
  margin-bottom: 12px;
}

.cert-text {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 声明横条 */
.compliance-banner {
  background: #fff8e8;
  border: 1px solid #f2dfb6;
  padding: 16px 24px;
  border-radius: 8px;
  max-width: 1200px;
  margin: 40px auto 0 auto;
  font-size: 13px;
  color: #8c6328;
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 页脚 */
footer {
  background: #1f2229;
  color: #888;
  padding: 30px 24px;
  font-size: 13px;
  text-align: center;
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-bottom a {
  color: #aaa;
  text-decoration: none;
}

.footer-bottom a:hover {
  color: var(--accent-gold);
}

/* 响应式适配 */
@media (max-width: 900px) {
  .hero-container {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 30px;
  }
  .nav-links {
    display: none;
  }
  .hero-visual {
    margin-top: 20px;
  }
}