/* ========================================
   首页样式 - 晶莹剔透 · 品质基石
   ======================================== */

/* 通用区块 */
.section {
  padding: var(--spacing-4xl) 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  font-size: clamp(2.2rem, 3vw, 3rem);
  color: var(--color-secondary-dark);
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

.section-description {
  margin-left: auto;
  margin-right: auto;
}

/* 英雄区 */
.hero-crystal {
  padding: var(--spacing-5xl) 0 var(--spacing-4xl);
  position: relative;
  overflow: hidden;
}

.hero-crystal::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 20%, rgba(253, 216, 53, 0.25), transparent 45%),
              radial-gradient(circle at 80% 0%, rgba(96, 125, 139, 0.25), transparent 40%);
  opacity: 0.7;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: center;
  gap: var(--spacing-4xl);
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: clamp(2.8rem, 4vw, 3.8rem);
  margin: var(--spacing-lg) 0;
  color: var(--color-secondary-dark);
}

.hero-lead {
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-2xl);
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-2xl);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--spacing-lg);
}

.hero-visual {
  position: relative;
}

.hero-panel {
  border-radius: var(--radius-2xl);
  overflow: hidden;
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.45);
  box-shadow: 0 30px 90px rgba(38, 50, 56, 0.2);
}

.hero-panel img {
  width: 100%;
  display: block;
  height: 480px;
  object-fit: cover;
}

.hero-panel::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(12, 20, 29, 0) 0%, rgba(12, 20, 29, 0.75) 100%);
}

.hero-panel-badge {
  position: absolute;
  bottom: var(--spacing-xl);
  left: var(--spacing-xl);
  background: rgba(255, 255, 255, 0.92);
  border-radius: var(--radius-xl);
  padding: var(--spacing-md) var(--spacing-2xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  box-shadow: 0 20px 60px rgba(12, 20, 29, 0.3);
}

.hero-panel-badge span {
  color: var(--color-secondary-dark);
  font-weight: var(--font-weight-semibold);
}

.hero-orb {
  position: absolute;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.6), rgba(176, 190, 197, 0.2));
  filter: blur(2px);
  top: -30px;
  right: 10%;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* 产品粒度 */
.grade-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--spacing-xl);
}

.grade-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  border: 1px solid var(--color-border);
  box-shadow: 0 20px 50px rgba(38, 50, 56, 0.08);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  position: relative;
  overflow: hidden;
}

.grade-card::after {
  content: attr(data-grade);
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  font-size: var(--font-size-sm);
  letter-spacing: 0.3em;
  color: rgba(96, 125, 139, 0.25);
}

.grain-size {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-secondary-dark);
}

.grade-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
}

.grade-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.purity-bar {
  height: 6px;
  width: 100%;
  border-radius: var(--radius-full);
  background: rgba(176, 190, 197, 0.3);
  overflow: hidden;
}

.purity-bar span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--color-secondary-dark), var(--color-accent));
}

/* 应用领域 */
.applications {
  background: var(--color-bg-secondary);
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--spacing-xl);
}

.app-card {
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  box-shadow: 0 15px 45px rgba(38, 50, 56, 0.08);
}

.app-card img {
  width: 100%;
  height: 210px;
  object-fit: cover;
}

.app-card-content {
  padding: var(--spacing-xl);
}

.app-card-content h4 {
  color: var(--color-secondary-dark);
  margin-bottom: var(--spacing-sm);
}

.app-card-content p {
  margin: 0;
  color: var(--color-text-secondary);
}

/* 工艺流程 */
.process-flow {
  background: radial-gradient(circle at top left, rgba(253, 216, 53, 0.15), transparent 50%);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: var(--spacing-lg);
}

.process-step {
  position: relative;
  padding: var(--spacing-xl);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  text-align: center;
  box-shadow: 0 10px 30px rgba(38, 50, 56, 0.08);
}

.process-step::after {
  content: '';
  position: absolute;
  top: 50%;
  right: -12px;
  width: 24px;
  height: 1px;
  background: var(--color-border);
  transform: translateY(-50%);
}

.process-step:last-child::after {
  display: none;
}

.step-index {
  width: 40px;
  height: 40px;
  margin: 0 auto var(--spacing-md);
  border-radius: var(--radius-full);
  background: rgba(96, 125, 139, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-secondary-dark);
  font-weight: var(--font-weight-semibold);
}

.step-title {
  font-weight: var(--font-weight-semibold);
  color: var(--color-secondary-dark);
  margin-bottom: var(--spacing-xs);
}

.step-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
}

/* 质量数据 */
.quality-data {
  background: var(--color-bg-secondary);
}

.quality-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: var(--spacing-3xl);
}

.quality-panel {
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-border);
  padding: var(--spacing-3xl);
  box-shadow: 0 20px 50px rgba(38, 50, 56, 0.1);
}

.quality-panel h3 {
  color: var(--color-secondary-dark);
  margin-bottom: var(--spacing-lg);
}

.quality-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--spacing-lg);
}

.quality-table {
  width: 100%;
  border-collapse: collapse;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 15px 35px rgba(38, 50, 56, 0.08);
}

.quality-table thead {
  background: linear-gradient(90deg, var(--color-secondary-dark), var(--color-primary-dark));
  color: var(--color-white);
}

.quality-table th,
.quality-table td {
  padding: var(--spacing-lg) var(--spacing-xl);
  text-align: left;
  font-size: var(--font-size-sm);
}

.quality-table tbody tr:nth-child(2n) {
  background: rgba(176, 190, 197, 0.12);
}

.quality-table tbody tr:hover {
  background: rgba(253, 216, 53, 0.15);
}

/* 客户 */
.clients {
  background: linear-gradient(135deg, rgba(176, 190, 197, 0.25), transparent);
}

.client-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.client-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  box-shadow: 0 15px 35px rgba(38, 50, 56, 0.08);
}

.client-note {
  text-align: center;
  margin-top: var(--spacing-xl);
  color: var(--color-text-secondary);
}

/* 供应保障 */
.supply-chain {
  background: var(--color-bg-secondary);
}

.supply-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--spacing-2xl);
}

.supply-card {
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  box-shadow: 0 20px 50px rgba(38, 50, 56, 0.08);
}

.supply-card h4 {
  color: var(--color-secondary-dark);
  margin-bottom: var(--spacing-sm);
}

.supply-card p {
  margin: 0;
  color: var(--color-text-secondary);
}

/* 响应式 */
@media (max-width: 1024px) {
  .hero-grid,
  .grade-grid,
  .app-grid,
  .quality-grid,
  .supply-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  
  .process-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  
  .client-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  
  .hero-panel img {
    height: 380px;
  }
}

@media (max-width: 768px) {
  .hero-grid,
  .grade-grid,
  .app-grid,
  .quality-grid,
  .supply-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  
  .applications,
  .quality-data,
  .supply-chain {
    padding: var(--spacing-3xl) 0;
  }
  
  .process-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  
  .client-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 480px) {
  .hero-metrics {
    grid-template-columns: 1fr;
  }
  
  .process-grid {
    grid-template-columns: 1fr;
  }
  
  .client-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-panel img {
    height: 300px;
  }
}