/* ============================================================
   首页专用样式 - 分子创新主题
   ============================================================ */

.section-block {
  padding: clamp(4rem, 10vw, 7rem) 0;
  position: relative;
}

.section-block::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 15% 20%, rgba(77, 208, 225, 0.12), transparent 55%),
              radial-gradient(circle at 85% 15%, rgba(255, 152, 0, 0.08), transparent 60%);
  pointer-events: none;
  opacity: 0.7;
}

.section-block > .container {
  position: relative;
  z-index: 1;
}

/* 英雄区 */
.hero-lab {
  padding: clamp(5rem, 12vw, 9rem) 0;
  position: relative;
}

.hero-lab::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 30%, rgba(77, 208, 225, 0.15), transparent 50%),
              radial-gradient(circle at 85% 20%, rgba(0, 92, 175, 0.25), transparent 55%),
              linear-gradient(135deg, rgba(0, 28, 84, 0.2), rgba(0, 92, 175, 0.05));
  filter: blur(0);
  pointer-events: none;
}

.hero-lab .container {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(2.5rem, 6vw, 4.5rem);
  align-items: center;
}

.hero-text {
  grid-column: span 6;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-base);
  background: rgba(0, 92, 175, 0.1);
  color: var(--color-primary);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-base);
}

.hero-text h1 {
  font-size: clamp(2.75rem, 4.5vw, 3.75rem);
  color: var(--color-dark);
  margin-bottom: var(--spacing-lg);
}

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

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

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(120px, 1fr));
  gap: var(--spacing-lg);
}

.metric {
  background: rgba(255, 255, 255, 0.92);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-base) var(--spacing-lg);
  border: 1px solid rgba(0, 92, 175, 0.08);
  box-shadow: 0 12px 28px rgba(9, 29, 61, 0.08);
}

.metric-value {
  display: block;
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.metric-label {
  font-size: var(--font-size-sm);
  color: var(--color-gray);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-visual {
  grid-column: span 6;
  display: flex;
  justify-content: center;
}

.molecule-visual {
  position: relative;
  width: clamp(320px, 34vw, 480px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 40%, rgba(255, 255, 255, 0.85), rgba(0, 14, 46, 0.8));
  box-shadow: 0 40px 80px rgba(5, 31, 71, 0.35);
  overflow: hidden;
  border: 1px solid rgba(77, 208, 225, 0.25);
}

.molecule-visual::after {
  content: '';
  position: absolute;
  inset: 10%;
  border-radius: 50%;
  border: 1px dashed rgba(77, 208, 225, 0.18);
}

.molecule-core {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 38%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(77, 208, 225, 0.6), rgba(0, 92, 175, 0.9));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 60px rgba(77, 208, 225, 0.6);
}

.core-glow {
  position: absolute;
  inset: -25%;
  background: radial-gradient(circle, rgba(77, 208, 225, 0.4), transparent 70%);
  border-radius: 50%;
  animation: core-pulse 4s ease-in-out infinite;
}

.core-nucleus {
  position: relative;
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
  letter-spacing: 0.12em;
}

.molecule-orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 92%;
  height: 92%;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  animation: orbit-spin 28s linear infinite;
}

.orbit-2 {
  width: 68%;
  height: 68%;
  animation-duration: 22s;
}

.orbit-3 {
  width: 48%;
  height: 48%;
  animation-duration: 18s;
}

.molecule-orbit .electron {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.9), rgba(0, 92, 175, 0.8));
  box-shadow: 0 0 20px rgba(77, 208, 225, 0.8);
  transform-origin: 0 0;
  transform: rotate(var(--angle)) translateX(var(--radius));
  animation: electron-glow 3s ease-in-out infinite;
}

.molecule-points {
  position: absolute;
  bottom: 10%;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--spacing-sm);
}

.molecule-chip {
  padding: var(--spacing-sm) var(--spacing-base);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.12);
  color: var(--color-white);
  border: 1px solid rgba(77, 208, 225, 0.4);
  backdrop-filter: blur(6px);
}

/* 产品应用领域 */
.lab-domains .section-title {
  text-align: left;
  max-width: 720px;
  margin-bottom: var(--spacing-2xl);
}

.application-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-xl);
}

.application-card {
  position: relative;
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-lg);
  color: var(--color-white);
  overflow: hidden;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  background: linear-gradient(135deg, rgba(0, 92, 175, 0.85), rgba(0, 37, 85, 0.85));
  box-shadow: 0 24px 48px rgba(3, 22, 56, 0.28);
}

.application-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: var(--bg, linear-gradient(135deg, rgba(0, 92, 175, 0.4), rgba(0, 43, 95, 0.5)));
  background-size: cover;
  background-position: center;
  opacity: 0.6;
  transition: opacity var(--transition-base);
}

.application-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 24, 56, 0.1), rgba(5, 24, 56, 0.85));
}

.application-card:hover::before {
  opacity: 0.8;
}

.application-card > * {
  position: relative;
  z-index: 1;
}

.application-tag {
  display: inline-flex;
  padding: var(--spacing-sm) var(--spacing-base);
  border-radius: var(--border-radius-full);
  background: rgba(0, 0, 0, 0.4);
  font-size: var(--font-size-sm);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-base);
}

.application-card h3 {
  color: var(--color-white);
  margin-bottom: var(--spacing-base);
}

.application-card p {
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--spacing-base);
}

.application-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.application-card li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: var(--spacing-sm);
  color: rgba(255, 255, 255, 0.9);
}

.application-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.4rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.4);
}

/* 研发实力 */
.rd-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.rd-card {
  background: rgba(255, 255, 255, 0.92);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  box-shadow: 0 18px 48px rgba(9, 29, 61, 0.12);
  border: 1px solid rgba(0, 92, 175, 0.08);
}

.rd-card h3 {
  margin-bottom: var(--spacing-base);
  color: var(--color-primary);
}

.rd-card p {
  color: var(--color-gray);
  margin-bottom: var(--spacing-lg);
}

.rd-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.rd-card li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-dark-text);
}

.rd-card li::before {
  content: '●';
  position: absolute;
  left: 0;
  top: 0.1rem;
  font-size: 0.65rem;
  color: var(--color-secondary);
}

.lab-badges {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.lab-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-base);
  border-radius: var(--border-radius-full);
  background: rgba(77, 208, 225, 0.15);
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  letter-spacing: 0.05em;
}

.rd-timeline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-lg);
}

.rd-timeline .timeline-item {
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-base);
  background: rgba(0, 92, 175, 0.08);
  border: 1px solid rgba(0, 92, 175, 0.12);
}

.timeline-year {
  display: block;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.timeline-item p {
  margin: 0;
  color: var(--color-dark-text);
}

/* HSE 管理 */
.safety-wrapper {
  background: rgba(255, 255, 255, 0.92);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-2xl);
  box-shadow: 0 18px 48px rgba(9, 29, 61, 0.12);
  border: 1px solid rgba(0, 92, 175, 0.08);
  display: grid;
  gap: var(--spacing-2xl);
}

.safety-intro {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.safety-highlights {
  display: flex;
  gap: var(--spacing-xl);
  flex-wrap: wrap;
}

.safety-metric {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

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

.safety-label {
  font-size: var(--font-size-sm);
  color: var(--color-gray);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.safety-matrix {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-xl);
}

.safety-card {
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  background: linear-gradient(135deg, rgba(0, 92, 175, 0.08), rgba(77, 208, 225, 0.12));
  border: 1px solid rgba(0, 92, 175, 0.12);
  box-shadow: 0 16px 36px rgba(9, 29, 61, 0.1);
}

.safety-card h3 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-base);
}

.safety-card p {
  color: var(--color-gray);
  margin-bottom: var(--spacing-base);
}

.safety-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.safety-card li {
  position: relative;
  padding-left: 1.4rem;
  margin-bottom: var(--spacing-sm);
}

.safety-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.4rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-secondary), var(--color-secondary-dark));
  box-shadow: 0 0 10px rgba(255, 152, 0, 0.5);
}

/* CTA */
.cta-lab::after {
  background: radial-gradient(circle at 20% 40%, rgba(77, 208, 225, 0.18), transparent 60%),
              radial-gradient(circle at 80% 30%, rgba(255, 152, 0, 0.15), transparent 65%);
}

.cta-panel {
  display: flex;
  gap: var(--spacing-2xl);
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-lg);
  background: linear-gradient(135deg, rgba(0, 92, 175, 0.9), rgba(0, 43, 95, 0.92));
  color: var(--color-white);
  box-shadow: 0 28px 60px rgba(2, 18, 48, 0.35);
  position: relative;
  overflow: hidden;
}

.cta-panel::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 15% 20%, rgba(77, 208, 225, 0.28), transparent 55%),
              radial-gradient(circle at 80% 30%, rgba(255, 152, 0, 0.25), transparent 60%);
  pointer-events: none;
}

.cta-text h2 {
  color: var(--color-white);
  margin-bottom: var(--spacing-base);
}

.cta-text p {
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 0;
  max-width: 520px;
}

.cta-actions {
  display: flex;
  gap: var(--spacing-base);
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.cta-actions .btn-outline {
  border-color: var(--color-white);
  color: var(--color-white);
}

.cta-actions .btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.25);
}

/* 返回顶部按钮 */
.back-to-top {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
  color: var(--color-white);
  border: none;
  border-radius: var(--border-radius-full);
  cursor: pointer;
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast);
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 32px rgba(4, 24, 56, 0.35);
}

/* 动画 */
@keyframes orbit-spin {
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

@keyframes electron-glow {
  0%, 100% {
    box-shadow: 0 0 16px rgba(77, 208, 225, 0.6);
    opacity: 0.9;
  }
  50% {
    box-shadow: 0 0 28px rgba(77, 208, 225, 0.9);
    opacity: 1;
  }
}

@keyframes core-pulse {
  0%, 100% {
    opacity: 0.6;
    transform: scale(0.95);
  }
  50% {
    opacity: 0.85;
    transform: scale(1.05);
  }
}

/* 响应式设计 */
@media (max-width: 1024px) {
  .hero-lab .container {
    grid-template-columns: 1fr;
  }

  .hero-text,
  .hero-visual {
    grid-column: span 12;
  }

  .hero-visual {
    order: -1;
  }

  .hero-metrics {
    grid-template-columns: repeat(4, minmax(120px, 1fr));
  }
}

@media (max-width: 768px) {
  .hero-metrics {
    grid-template-columns: repeat(2, minmax(120px, 1fr));
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-panel {
    flex-direction: column;
    align-items: flex-start;
  }

  .cta-actions {
    width: 100%;
  }
}

@media (max-width: 576px) {
  .hero-metrics {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-base);
  }

  .molecule-visual {
    width: min(280px, 80vw);
  }

  .application-card {
    padding: var(--spacing-xl);
    min-height: 280px;
  }

  .safety-wrapper {
    padding: var(--spacing-xl);
  }

  .safety-matrix {
    gap: var(--spacing-lg);
  }
}