/* ===== 页面标题区 ===== */
.page-header {
  position: relative;
  padding: 160px 0 80px;
  text-align: center;
  overflow: hidden;
}

.page-header-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 50% 50%, rgba(196, 162, 101, 0.08) 0%, transparent 60%),
    linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  z-index: 0;
}

.page-header .container {
  position: relative;
  z-index: 1;
}

.page-header h1 {
  font-family: var(--font-serif);
  font-size: 2.8rem;
  font-weight: 600;
  color: var(--color-dark);
  letter-spacing: 8px;
  margin-bottom: 12px;
}

.page-header p {
  font-size: 1rem;
  color: var(--color-text-muted);
  letter-spacing: 4px;
  text-transform: uppercase;
}

/* ===== 产品战略 ===== */
.strategy-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.strategy-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 36px 24px;
  border: 1px solid var(--color-border);
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.strategy-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.strategy-badge {
  display: inline-block;
  background: var(--color-gold);
  color: #fff;
  font-size: 0.75rem;
  padding: 6px 16px;
  border-radius: 20px;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.strategy-card h3 {
  font-size: 1.15rem;
  color: var(--color-dark);
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.strategy-card p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.strategy-tag {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  letter-spacing: 1px;
}

/* ===== 四部曲详解 ===== */
.four-image {
  max-width: 700px;
  margin: 0 auto 48px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.four-image img {
  width: 100%;
}

.four-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  max-width: 700px;
  margin: 0 auto;
}

.four-version {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 36px;
  border: 1px solid var(--color-border);
}

.four-version.featured {
  border-color: var(--color-gold);
  box-shadow: 0 0 0 1px var(--color-gold-light), var(--shadow-md);
  position: relative;
}

.version-header {
  text-align: center;
  margin-bottom: 24px;
  position: relative;
}

.version-badge {
  position: absolute;
  top: -12px;
  right: -12px;
  background: var(--color-gold);
  color: #fff;
  font-size: 0.75rem;
  padding: 4px 12px;
  border-radius: 20px;
}

.version-header h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: var(--color-dark);
  letter-spacing: 3px;
  margin-bottom: 8px;
}

.version-price {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  color: var(--color-gold);
  font-weight: 600;
}

.version-list {
  list-style: none;
}

.version-list li {
  padding: 10px 0;
  border-bottom: 1px dashed var(--color-border);
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  position: relative;
  padding-left: 20px;
}

.version-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-gold);
}

/* ===== 核心产品 ===== */
.product-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.product-detail-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  display: flex;
  transition: var(--transition);
}

.product-detail-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.product-visual {
  width: 160px;
  min-height: 200px;
  background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.product-icon {
  font-family: var(--font-serif);
  font-size: 3rem;
  color: #fff;
  opacity: 0.9;
}

.product-detail-info {
  padding: 28px;
  flex: 1;
}

.product-detail-info h3 {
  font-size: 1.2rem;
  color: var(--color-dark);
  margin-bottom: 10px;
  letter-spacing: 1px;
}

.product-desc {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.product-specs {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.spec {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  padding: 6px 0;
  border-bottom: 1px solid var(--color-border);
}

.spec span:first-child {
  color: var(--color-text-muted);
}

.spec span:last-child {
  color: var(--color-dark);
  font-weight: 500;
}

/* ===== 全场景产品 ===== */
.all-products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.all-product-item {
  background: var(--bg-card);
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

.all-product-item:hover {
  background: var(--bg-secondary);
}

.all-product-item span:first-child {
  font-size: 0.95rem;
  color: var(--color-dark);
}

.all-product-item span:last-child {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  color: var(--color-gold);
  font-weight: 500;
}

/* ===== 服务时间线 ===== */
.service-timeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-phase {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  border: 1px solid var(--color-border);
  text-align: center;
  transition: var(--transition);
  position: relative;
}

.service-phase:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.service-badge {
  display: inline-block;
  background: var(--color-gold);
  color: #fff;
  font-size: 0.8rem;
  padding: 6px 20px;
  border-radius: 20px;
  letter-spacing: 2px;
  margin-bottom: 20px;
}

.service-phase h3 {
  font-size: 1.2rem;
  color: var(--color-dark);
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.service-phase p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.9;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .strategy-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .product-detail-grid {
    grid-template-columns: 1fr;
  }

  .all-products-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .service-timeline {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .page-header h1 {
    font-size: 2rem;
  }

  .strategy-grid {
    grid-template-columns: 1fr;
  }

  .four-comparison {
    grid-template-columns: 1fr;
  }

  .product-detail-card {
    flex-direction: column;
  }

  .product-visual {
    width: 100%;
    min-height: 120px;
  }

  .all-products-grid {
    grid-template-columns: 1fr;
  }
}