/* ========================================
   首页专属样式
   包含：Hero Banner、产品中心、证书跑马灯、品牌跑马灯、客户案例
   ======================================== */

/* ==================== 页面过渡遮罩（案例卡片跳转用） ==================== */
.page-transition-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--white);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}

.page-transition-overlay.active {
  opacity: 1;
  pointer-events: all;
}

/* ==================== Hero Banner ==================== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
}

.hero-slider {
  position: absolute;
  inset: 0;
}

.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1s ease;
}

.hero-slide.active {
  opacity: 1;
}

/* Hero背景图片 */
.hero-slide-bg {
  position: absolute;
  inset: 0;
  background: var(--gradient-primary);
}

.hero-slide-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-slide-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(0, 82, 163, 0.6) 0%, transparent 50%),
    radial-gradient(circle at 80% 30%, rgba(0, 168, 120, 0.5) 0%, transparent 40%),
    radial-gradient(circle at 60% 80%, rgba(0, 119, 200, 0.5) 0%, transparent 45%);
}

/* 网格装饰 */
.hero-slide-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
}

/* Hero内容 */
.hero-content {
  position: relative;
  z-index: 10;
  height: 100%;
  display: flex;
  align-items: center;
  padding: 0 var(--spacing-xl);
  max-width: var(--container-2xl);
  margin: 0 auto;
}

.hero-text {
  max-width: 700px;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: var(--spacing-lg);
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.hero-title span {
  color: var(--accent-gold);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.8;
}

.hero-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* Hero指示器 */
.hero-indicators {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--spacing-md);
  z-index: 20;
}

.hero-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.hero-indicator.active,
.hero-indicator:hover {
  background: var(--accent-gold);
  border-color: var(--accent-gold);
  transform: scale(1.2);
}

/* ==================== 产品中心预览 ==================== */
.products {
  background: var(--gray-50);
  position: relative;
}

.products::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--tech-blue), transparent);
}

/* 产品分类容器 - 两列大卡片 */
.product-categories {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-2xl);
}

/* 产品卡片 */
.product-card {
  position: relative;
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

/* 核心产品大卡片 */
.product-card-main .product-card-image {
  position: relative;
  height: 220px;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.product-card-main .product-card-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* 产品图片占位 */
.product-placeholder {
  width: 140px;
  height: 100px;
  background: rgba(255, 255, 255, 0.15);
  border: 2px dashed rgba(255, 255, 255, 0.4);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.875rem;
  text-align: center;
  padding: var(--spacing-sm);
}

/* 产品徽章 */
.product-card-badge {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--accent-gold);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
}

/* 绿色徽章（烟气换热器用） */
.product-card-badge-green {
  background: var(--eco-green);
}

/* 子产品列表 */
.product-sub-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  padding: 0;
  list-style: none;
}

.product-sub-list li {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-md);
  background: rgba(0, 82, 163, 0.08);
  color: var(--tech-blue);
  font-size: 0.8125rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.product-sub-list li::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--eco-green);
  border-radius: 50%;
  flex-shrink: 0;
}

.product-sub-list li:hover {
  background: rgba(0, 168, 120, 0.1);
  color: var(--eco-green-dark);
}

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

.product-card-title {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: var(--spacing-sm);
}

.product-card-desc {
  font-size: 0.9375rem;
  color: var(--gray-500);
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
}

.product-card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--tech-blue);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: all var(--transition-fast);
}

.product-card-link:hover {
  color: var(--tech-blue-dark);
  gap: var(--spacing-md);
}

/* ==================== 荣誉证书轮播 ==================== */
.certificates {
  background: var(--primary-dark);
  overflow: hidden;
}

.certificates .section-title {
  color: var(--white);
}

.certificates .section-desc {
  color: rgba(255, 255, 255, 0.7);
}

/* 证书轮播容器 */
.cert-carousel {
  position: relative;
  padding: var(--spacing-xl) 0 var(--spacing-3xl);
}

.cert-carousel-viewport {
  overflow: hidden;
  position: relative; /* 确保 track.offsetLeft 始终相对于 viewport 计算，而非外层 carousel */
  margin: 0 64px;
  padding: var(--spacing-xl) var(--spacing-md);
  perspective: 1200px;
}

.cert-carousel-track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.23, 1, 0.32, 1);
  will-change: transform;
}

/* 证书幻灯片：使用百分比+内边距实现gap，JS已改用像素定位不再依赖百分比计算 */
.cert-slide {
  flex: 0 0 calc(100% / 3);
  padding: 0 calc(var(--spacing-lg) / 2);
  box-sizing: border-box;
  transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
  transform-style: preserve-3d;
}

.cert-slide-inner {
  position: relative;
  aspect-ratio: 3 / 4.2;
  background: linear-gradient(135deg, rgba(255,255,255,0.08) 0%, rgba(255,255,255,0.02) 100%);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
  cursor: pointer;
}

.cert-slide-inner::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
  transition: all 0.5s ease;
  pointer-events: none;
  z-index: 2;
}

.cert-slide-inner::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 30%, rgba(255,215,0,0.03) 0%, transparent 60%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.cert-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.23, 1, 0.32, 1);
}

.cert-slide-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-lg) var(--spacing-md) var(--spacing-md);
  background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.5) 60%, transparent 100%);
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.4s ease;
}

.cert-slide-name {
  color: var(--white);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.5;
  display: block;
  text-align: center;
}

/* 非激活态：缩小、变暗、压低 */
.cert-slide:not(.active) .cert-slide-inner {
  transform: scale(0.92);
  opacity: 0.6;
  filter: brightness(0.7) grayscale(0.2);
}

.cert-slide:not(.active) .cert-slide-inner::before {
  border-color: rgba(255, 255, 255, 0.05);
}

/* 激活态：居中突出、金色边框、光效 */
.cert-slide.active .cert-slide-inner {
  transform: scale(1.03);
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.5),
    0 0 0 2px rgba(255, 215, 0, 0.4),
    0 0 30px rgba(255, 215, 0, 0.1);
}

.cert-slide.active .cert-slide-inner::before {
  border-color: rgba(255, 215, 0, 0.6);
  box-shadow: inset 0 0 20px rgba(255, 215, 0, 0.05);
}

.cert-slide.active .cert-slide-inner::after {
  opacity: 1;
}

.cert-slide.active img {
  transform: scale(1.03);
}

.cert-slide.active .cert-slide-overlay {
  opacity: 1;
  transform: translateY(0);
}

/* 导航箭头 */
.cert-carousel-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  background: rgba(10, 30, 46, 0.8);
  backdrop-filter: blur(10px);
  color: var(--white);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  z-index: 10;
}

.cert-carousel-arrow svg {
  width: 20px;
  height: 20px;
}

.cert-carousel-arrow:hover {
  background: var(--tech-blue);
  border-color: var(--tech-blue);
  box-shadow: 0 0 20px rgba(0, 82, 163, 0.4);
}

.cert-carousel-prev {
  left: 0;
}

.cert-carousel-next {
  right: 0;
}

/* 指示点 */
.cert-carousel-dots {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xl);
}

.cert-carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  padding: 0;
}

.cert-carousel-dot:hover {
  background: rgba(255, 255, 255, 0.4);
}

.cert-carousel-dot.active {
  background: var(--tech-blue);
  box-shadow: 0 0 10px rgba(0, 82, 163, 0.5);
  transform: scale(1.2);
}

/* 原图预览遮罩层 */
.cert-preview-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(10px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.3s ease;
}

.cert-preview-overlay.active {
  display: flex;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.cert-preview-content {
  position: relative;
  max-width: 90%;
  max-height: 90%;
  animation: zoomIn 0.3s ease;
}

@keyframes zoomIn {
  from {
    transform: scale(0.8);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.cert-preview-close {
  position: absolute;
  top: -40px;
  right: 0;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.cert-preview-close:hover {
  background: rgba(255, 59, 48, 0.8);
  border-color: #fff;
  transform: rotate(90deg);
}

.cert-preview-content img {
  max-width: 100%;
  max-height: 85vh;
  object-fit: contain;
  border: 4px solid #ffd700;
  border-radius: var(--radius-lg);
  box-shadow: 0 0 40px rgba(255, 215, 0, 0.3), 0 20px 60px rgba(0, 0, 0, 0.5);
}

/* 证书轮播响应式 */
@media (max-width: 1200px) {
  .cert-slide {
    flex: 0 0 calc(100% / 3);
  }
}

@media (max-width: 991px) {
  .cert-carousel-viewport {
    margin: 0 56px;
  }

  .cert-slide {
    flex: 0 0 calc(100% / 2);
  }

  .cert-slide:not(.active) .cert-slide-inner {
    transform: scale(0.9);
  }
}

@media (max-width: 768px) {
  .cert-carousel-viewport {
    margin: 0 48px;
    padding: var(--spacing-md) 0;
  }

  /* 移动端单张展示：flex-basis 100% + 减小 padding 让内容更宽 */
  .cert-slide {
    flex: 0 0 100%;
    padding: 0 calc(var(--spacing-sm) / 2);
  }

  .cert-slide:not(.active) .cert-slide-inner {
    transform: scale(0.88);
  }

  .cert-carousel-arrow {
    width: 40px;
    height: 40px;
  }
}

@media (max-width: 576px) {
  .cert-carousel-viewport {
    margin: 0 40px;
  }

  /* 超小屏幕：减小 gap padding，让证书图片最大化 */
  .cert-slide {
    flex: 0 0 100%;
    padding: 0;
  }

  .cert-slide:not(.active) .cert-slide-inner {
    transform: scale(0.85);
  }

  .cert-slide-name {
    font-size: 0.875rem;
  }

  .cert-carousel-dots {
    margin-top: var(--spacing-lg);
  }
}

/* ==================== 合作品牌墙（已隐藏） ==================== */
#partners {
  display: none !important;
  visibility: hidden;
}

.partners {
  background: var(--gray-50);
}

.partners-marquee {
  overflow: hidden;
  width: 100%;
  padding: var(--spacing-xl) 0;
}

.partners-marquee .marquee-track {
  display: flex;
  gap: var(--spacing-3xl);
  width: max-content;
  animation: marquee-right 50s linear infinite;
}

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

.brand-item {
  flex-shrink: 0;
  width: 160px;
  height: 80px;
  background: var(--white);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-400);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition-normal);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.brand-item img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.brand-item:hover {
  transform: scale(1.2);
  z-index: 100;
  box-shadow: var(--shadow-2xl);
  color: var(--tech-blue);
}

/* ==================== 客户案例预览 ==================== */
.cases {
  background: var(--white);
}

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

.case-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.case-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.case-card-image {
  position: relative;
  height: 240px;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

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

/* 案例图片占位 */
.case-placeholder {
  width: 100px;
  height: 100px;
  background: rgba(255, 255, 255, 0.1);
  border: 2px dashed rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.case-placeholder svg {
  width: 40px;
  height: 40px;
  color: rgba(255, 255, 255, 0.5);
}

.case-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 22, 40, 0.9) 0%, transparent 60%);
}

.case-card-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-xl);
}

.case-card-tag {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--accent-gold);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-sm);
}

.case-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: var(--spacing-xs);
}

.case-card-desc {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
}

/* 案例卡片可点击状态 */
.case-card {
  display: block;
  text-decoration: none;
  cursor: pointer;
}

.case-card:focus-visible {
  outline: 3px solid var(--accent-gold);
  outline-offset: 4px;
}

.case-card-image img {
  transition: transform var(--transition-slow);
}

.case-card:hover .case-card-image img {
  transform: scale(1.08);
}

.case-card-action {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  background: rgba(10, 22, 40, 0.45);
  color: var(--white);
  font-size: 1rem;
  font-weight: 600;
  opacity: 0;
  transition: opacity var(--transition-normal);
  pointer-events: none;
}

.case-card-action svg {
  transition: transform var(--transition-fast);
}

.case-card:hover .case-card-action {
  opacity: 1;
}

.case-card:hover .case-card-action svg {
  transform: translateX(4px);
}

/* 移动端禁用悬停放大，避免误触 */
@media (hover: none) {
  .case-card:hover .case-card-image img {
    transform: none;
  }

  .case-card-action {
    display: none;
  }
}

/* ==================== 响应式设计 ==================== */

/* 大屏幕 (1440px+) */
@media (min-width: 1440px) {
  .hero-title {
    font-size: 4rem;
  }
}

/* 平板 (1024px - 1439px) */
@media (max-width: 1439px) {
  .hero-title {
    font-size: 3rem;
  }

  .product-categories,
  .cases-grid {
    gap: var(--spacing-xl);
  }
}

/* 小平板 (768px - 1023px) */
@media (max-width: 1023px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.125rem;
  }

  .product-categories,
  .cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 手机 (< 768px) */
@media (max-width: 767px) {
  .hero {
    min-height: 500px;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-btn {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .btn-primary,
  .btn-outline {
    width: 100%;
    justify-content: center;
  }

  .product-categories,
  .cases-grid {
    grid-template-columns: 1fr;
  }

  .product-card-image,
  .case-card-image {
    height: 180px;
  }

  .brand-item {
    width: 130px;
    height: 65px;
  }

  /* 证书hover在移动端禁用scale */
  .brand-item:hover {
    transform: none;
  }
}

/* 超小屏幕 (< 480px) */
@media (max-width: 479px) {
  .hero-title {
    font-size: 1.75rem;
  }

  .hero-content {
    padding: 0 var(--spacing-md);
  }
}

/* ==================== 打印样式 ==================== */
@media print {
  .hero-indicators {
    display: none !important;
  }

  .hero {
    height: auto;
    min-height: auto;
    padding: var(--spacing-2xl) 0;
  }
}