/* 
 * 首页样式 - 技术架构导向与场景化展示
 */

@import url('variables.css');

main {
  margin-top: 72px;
  background-color: var(--color-surface-light);
}

/* ===== 首屏：软件定义智能网联 ===== */
.hero-landing {
  position: relative;
  padding: 120px 0 96px;
  color: var(--color-white);
  background-image: url('../images/hero_banner_02.png');
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.hero-landing::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, rgba(11, 34, 74, 0.92) 0%, rgba(11, 34, 74, 0.88) 55%, rgba(17, 27, 50, 0.9) 100%);
}

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

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.hero-text h1 {
  font-size: 3.25rem;
  line-height: 1.15;
  margin-bottom: var(--spacing-md);
}

.hero-text .subtitle {
  font-size: var(--font-size-xl);
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--spacing-xl);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.hero-kpis {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

.kpi {
  padding: var(--spacing-lg);
  border-radius: var(--radius-xl);
  background-color: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

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

.kpi .label {
  color: rgba(255, 255, 255, 0.8);
  margin-top: var(--spacing-xs);
  font-size: var(--font-size-sm);
}

.hero-architecture {
  background-color: rgba(17, 27, 50, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-2xl);
}

.architecture-mini {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.mini-block {
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--color-white);
}

.mini-block h4 {
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-lg);
}

.mini-block p {
  margin: 0;
  color: rgba(255, 255, 255, 0.75);
  font-size: var(--font-size-sm);
}

/* ===== ADAS技术架构交互图 ===== */
.architecture-section {
  padding: var(--spacing-5xl) 0;
  background-color: var(--color-bg-primary);
}

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

.architecture-diagram {
  background-color: var(--color-white);
  border: 1px solid var(--color-gray);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-lg);
  background-image: url('../images/tech_abstract_01.png');
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
}

.architecture-diagram::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.92) 0%, rgba(255,255,255,0.9) 100%);
}

.architecture-diagram-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--spacing-lg);
}

.arch-layer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-gray);
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.arch-layer:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.arch-layer.active {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg), var(--shadow-glow-sm);
}

.arch-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-weight: var(--font-weight-semibold);
}

.arch-label .dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-primary);
  box-shadow: 0 0 0 6px rgba(11, 92, 255, 0.12);
}

.arch-summary {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  margin: 0;
}

.arch-details {
  background-color: var(--color-surface-light);
  border: 1px solid var(--color-gray);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-md);
}

.arch-detail-card {
  display: none;
}

.arch-detail-card.active {
  display: grid;
  gap: var(--spacing-md);
}

.arch-detail-card h4 {
  color: var(--color-primary);
  margin: 0;
}

.arch-detail-card ul {
  margin: 0;
  padding-left: var(--spacing-lg);
  color: var(--color-text-light);
  line-height: var(--line-height-relaxed);
}

/* ===== 核心业务矩阵 ===== */
.business-section {
  padding: var(--spacing-5xl) 0;
  background-color: var(--color-surface);
  color: var(--color-white);
}

.business-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

.business-card {
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.business-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

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

.business-card p {
  color: rgba(255, 255, 255, 0.75);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-md);
}

.business-meta {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.business-meta .tag {
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

/* ===== 科研与验证 ===== */
.research-section {
  padding: var(--spacing-5xl) 0;
  background-color: var(--color-bg-primary);
}

.research-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.research-media {
  display: grid;
  gap: var(--spacing-lg);
}

.media-card {
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-gray);
}

.media-card img {
  width: 100%;
  display: block;
  height: auto;
}

.research-points {
  display: grid;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.research-point {
  display: flex;
  gap: var(--spacing-md);
  align-items: flex-start;
}

.research-point .badge {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-lg);
  background-color: var(--color-surface-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
  border: 1px solid var(--color-gray);
}

/* ===== 产品矩阵 ===== */
.product-section {
  padding: var(--spacing-5xl) 0;
  background-color: var(--color-bg-primary);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-2xl);
}

.product-card {
  border-radius: var(--radius-2xl);
  background-color: var(--color-white);
  border: 1px solid var(--color-gray);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg), var(--shadow-glow-sm);
}

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

.product-body {
  padding: var(--spacing-xl);
  flex: 1;
  display: grid;
  gap: var(--spacing-sm);
}

.product-body h3 {
  margin: 0;
  color: var(--color-primary);
}

.product-body p {
  margin: 0;
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
}

.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

/* ===== 场景化应用 ===== */
.scenario-section {
  padding: var(--spacing-5xl) 0;
  background-color: var(--color-surface);
  color: var(--color-white);
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

.scenario-card {
  position: relative;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  min-height: 240px;
  box-shadow: var(--shadow-lg);
  background-color: var(--color-secondary);
}

.scenario-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.7);
}

.scenario-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.55) 100%);
}

.scenario-content {
  position: relative;
  z-index: 1;
  padding: var(--spacing-xl);
  display: grid;
  gap: var(--spacing-sm);
}

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

.scenario-content p {
  margin: 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: var(--font-size-sm);
}

/* ===== 案例与新闻 ===== */
.case-news-section {
  padding: var(--spacing-5xl) 0;
  background-color: var(--color-bg-primary);
}

.case-news-grid {
  display: grid;
  grid-template-columns: 1fr 0.85fr;
  gap: var(--spacing-3xl);
}

.case-card {
  border-radius: var(--radius-2xl);
  overflow: hidden;
  border: 1px solid var(--color-gray);
  box-shadow: var(--shadow-md);
  background-color: var(--color-white);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
}

.case-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-body {
  padding: var(--spacing-xl);
  display: grid;
  gap: var(--spacing-sm);
}

.case-body h3 {
  margin: 0;
  color: var(--color-primary);
}

.case-body p {
  margin: 0;
  color: var(--color-text-light);
  line-height: var(--line-height-relaxed);
}

.news-list {
  display: grid;
  gap: var(--spacing-lg);
}

.news-item {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-lg);
  align-items: center;
  padding: var(--spacing-lg);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-gray);
  background-color: var(--color-white);
}

.news-item img {
  width: 100%;
  height: 120px;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.news-meta {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.news-item h4 {
  margin: 0;
  color: var(--color-primary);
}

/* ===== 合作与CTA ===== */
.partner-section {
  padding: var(--spacing-5xl) 0;
  background-color: var(--color-surface);
  color: var(--color-white);
}

.partner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--spacing-lg);
  align-items: center;
}

.partner-logo {
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  text-align: center;
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.partner-logo img {
  max-width: 100%;
  height: auto;
}

.cta-main {
  padding: var(--spacing-4xl) 0;
  background-color: var(--color-primary);
  color: var(--color-white);
  text-align: center;
}

.cta-main h2 {
  margin-bottom: var(--spacing-md);
}

.cta-main p {
  margin-bottom: var(--spacing-xl);
  color: rgba(255, 255, 255, 0.9);
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

/* ===== 响应式 ===== */
@media (max-width: 1100px) {
  .hero-grid,
  .architecture-grid,
  .case-news-grid,
  .research-grid {
    grid-template-columns: 1fr;
  }
  
  .case-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  main {
    margin-top: 64px;
  }
  
  .hero-landing {
    padding: var(--spacing-4xl) 0;
  }
  
  .hero-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-text h1 {
    font-size: var(--font-size-4xl);
  }
  
  .architecture-section,
  .business-section,
  .research-section,
  .product-section,
  .scenario-section,
  .case-news-section,
  .partner-section,
  .cta-main {
    padding: var(--spacing-4xl) 0;
  }
  
  .architecture-diagram,
  .arch-details,
  .business-card,
  .product-card,
  .scenario-card,
  .case-card,
  .news-item {
    border-radius: var(--radius-xl);
  }
  
  .news-item {
    grid-template-columns: 1fr;
  }
}