/* ========================================
   首页特定样式（严格遵循方案）
   ======================================== */

/* ========== 首屏英雄区 ========== */
.hero-banner {
  position: relative;
  min-height: 85vh;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  color: var(--color-white);
  overflow: hidden;
}

.hero-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 82, 165, 0.6);
}

.hero-banner .container {
  position: relative;
  z-index: 1;
}

.hero-banner .section-eyebrow {
  color: var(--color-white);
  letter-spacing: 0.12em;
}

.hero-content {
  max-width: 760px;
}

.hero-content h1 {
  color: var(--color-white);
  margin-bottom: var(--spacing-4);
}

.hero-content p {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-5);
  max-width: 680px;
}

.hero-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-4);
}

.hero-chip {
  border: 1px solid rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-white);
  padding: var(--spacing-2) var(--spacing-3);
  font-size: var(--font-size-sm);
  letter-spacing: 0.02em;
  border-radius: var(--radius-none);
}

.hero-actions {
  display: flex;
  gap: var(--spacing-4);
  flex-wrap: wrap;
}

.hero-actions .btn {
  padding: var(--spacing-3) var(--spacing-6);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--spacing-4);
  margin-top: var(--spacing-6);
}

.hero-stat {
  border-top: 2px solid rgba(255, 255, 255, 0.7);
  padding-top: var(--spacing-3);
  color: rgba(255, 255, 255, 0.9);
}

.hero-stat strong {
  display: block;
  color: var(--color-white);
  font-size: var(--font-size-4xl);
  letter-spacing: var(--letter-spacing-tight);
}

/* ========== 核心业务入口 ========== */
.business-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-6);
}

.business-card {
  position: relative;
  height: 260px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-none);
  overflow: hidden;
  background-size: cover;
  background-position: center;
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.business-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  transition: background var(--transition-base);
}

.business-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.business-card:hover::after {
  background: rgba(0, 0, 0, 0.35);
}

.business-card-content {
  position: absolute;
  inset: auto 0 0 0;
  padding: var(--spacing-5);
  color: var(--color-white);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
  z-index: 1;
  background: rgba(0, 0, 0, 0.58);
}

.business-card-content h3 {
  margin: 0;
  color: var(--color-white);
}

.business-card-content p {
  margin: 0;
  color: rgba(255, 255, 255, 0.88);
  font-size: var(--font-size-sm);
}

.business-card-content span {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.85);
}

/* ========== 公司简介 ========== */
.intro-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-8);
  align-items: center;
}

.intro-media {
  position: relative;
  border-radius: var(--radius-none);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.intro-media img {
  height: 100%;
  width: 100%;
  object-fit: cover;
}

.stat-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--spacing-4);
  margin-top: var(--spacing-6);
}

.stat-chip {
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-none);
  padding: var(--spacing-4);
}

.stat-chip strong {
  display: block;
  font-size: var(--font-size-2xl);
  color: var(--color-primary);
}

/* ========== 产品 tabs ========== */
.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
  border-bottom: 1px solid var(--color-border);
}

[role="tab"] {
  padding: var(--spacing-3) var(--spacing-4);
  border: 1px solid var(--color-border);
  background: var(--color-bg-white);
  color: var(--color-text-secondary);
  border-radius: var(--radius-none);
  cursor: pointer;
  font-weight: var(--font-weight-semibold);
  border-bottom: 2px solid transparent;
}

[role="tab"][aria-selected="true"] {
  background: var(--color-bg-light);
  color: var(--color-primary);
  border-color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

[role="tabpanel"] {
  padding-top: var(--spacing-6);
}

.product-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-6);
}

.product-tile {
  position: relative;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-none);
  overflow: hidden;
  background: var(--color-bg-primary);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.product-tile::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 0;
  background: var(--color-primary);
  transition: height var(--transition-fast);
}

.product-tile:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
  border-color: var(--color-primary);
}

.product-tile:hover::after {
  height: 4px;
}

.product-tile img {
  height: 180px;
  width: 100%;
  object-fit: cover;
}

.product-tile-body {
  padding: var(--spacing-4);
}

.product-tile-body h4 {
  margin-bottom: var(--spacing-2);
}

.product-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
  color: var(--color-text-tertiary);
  font-size: var(--font-size-sm);
}

.product-meta span {
  padding: var(--spacing-1) var(--spacing-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-none);
  background: var(--color-bg-light);
}

/* ========== 冷链优势 ========== */
.cold-chain {
  background: var(--color-bg-light);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.cold-chain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-6);
  margin-top: var(--spacing-6);
}

.cold-card {
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-none);
  padding: var(--spacing-6);
  height: 100%;
  border-top: 3px solid var(--color-accent);
}

.cold-card h4 {
  margin-bottom: var(--spacing-2);
}

.cold-metric {
  font-size: var(--font-size-4xl);
  color: var(--color-accent);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-2);
}

.cold-note {
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* ========== 新闻与动态 ========== */
.news-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--spacing-6);
}

.news-feature {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-none);
  overflow: hidden;
  background: var(--color-bg-primary);
}

.news-feature img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.news-feature-body {
  padding: var(--spacing-5);
}

.news-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.news-item {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--spacing-4);
}

.news-item:last-child {
  border-bottom: none;
}

.news-item-title {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.news-item-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  color: var(--color-text-tertiary);
  font-size: var(--font-size-sm);
}

/* ========== 合作伙伴 ========== */
.partner-wall {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--spacing-4);
  align-items: center;
}

.partner-item {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-none);
  padding: var(--spacing-4);
  text-align: center;
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-semibold);
  filter: grayscale(1);
  transition: all var(--transition-fast);
}

.partner-item:hover {
  filter: grayscale(0);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

/* 首页合作伙伴自动滚动 */
.partner-marquee {
  position: relative;
  overflow: hidden;
}

.partner-track {
  display: flex;
  align-items: stretch;
  gap: var(--spacing-4);
  animation: partner-marquee var(--marquee-duration, 22s) linear infinite;
}

.partner-track:hover {
  animation-play-state: paused;
}

.partner-track .partner-item {
  flex: 0 0 auto;
  min-width: 180px;
}

@keyframes partner-marquee {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

/* ========== 联系我们区块 ========== */
.contact-panel {
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-none);
  padding: var(--spacing-8);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--spacing-8);
  box-shadow: var(--shadow-sm);
}

.contact-panel form .form-row {
  display: flex;
  gap: var(--spacing-4);
}

.contact-panel form .form-row > div {
  flex: 1;
}

.contact-map {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-none);
  padding: var(--spacing-5);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
  box-shadow: var(--shadow-sm);
}

.map-visual {
  height: 220px;
  border-radius: var(--radius-none);
  background-color: var(--color-bg-white);
  border: 1px dashed var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  text-align: center;
}

.capability-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--spacing-8);
  align-items: stretch;
}

.coldchain-visual {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-none);
  background: var(--color-ice);
  padding: var(--spacing-6);
  display: grid;
  grid-template-rows: auto 1fr;
  gap: var(--spacing-4);
}

.coldchain-visual img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border: 1px solid var(--color-border);
}

.coldchain-visual .metric-band {
  background: var(--color-bg-white);
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-5);
}

.capability-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-none);
  padding: var(--spacing-5);
  background: var(--color-bg-white);
  border-top: 3px solid var(--color-primary);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
  height: 100%;
}

.capability-card h4 {
  margin: 0;
}

.capability-card p {
  margin: 0;
}

.capability-card .tag-list {
  margin-top: var(--spacing-1);
}

.process-steps {
  margin-top: var(--spacing-6);
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-6);
}

.scenario-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-none);
  padding: var(--spacing-5);
  background: var(--color-mint);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.scenario-card h3 {
  margin: 0;
}

.assurance-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-5);
}

.assurance-card {
  border: 1px solid var(--color-border);
  background: var(--color-bg-white);
  padding: var(--spacing-5);
  border-radius: var(--radius-none);
}

.assurance-card h4 {
  margin-bottom: var(--spacing-2);
}

/* ========== 响应式 ========== */
@media (max-width: 1200px) {
  .hero-banner {
    min-height: 70vh;
  }
}

@media (max-width: 1024px) {
  .business-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .news-layout {
    grid-template-columns: 1fr;
  }

  .contact-panel {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 768px) {
  .hero-content h1 {
    font-size: var(--font-size-4xl);
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .contact-panel form .form-row {
    flex-direction: column;
  }

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

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

  .capability-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .hero-banner {
    min-height: 60vh;
  }

  .business-card {
    height: 240px;
  }
}