/* ========================================
   高科电力企业官网 - 首页专属样式 v2.0
   现代化、创新、环保科技风格
   ======================================== */

/* ==================== 页面过渡遮罩 ==================== */
.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: 700px;
  overflow: hidden;
}

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

.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.2s 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;
  transform: scale(1.1);
  transition: transform 8s ease;
}

.hero-slide.active .hero-slide-bg img {
  transform: scale(1);
}

.hero-slide-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  /* 中性深色遮罩：左侧文字区重度压暗，向右渐隐保留图片细节 */
  background:
    linear-gradient(100deg, rgba(4, 18, 30, 0.88) 0%, rgba(4, 18, 30, 0.72) 35%, rgba(4, 18, 30, 0.42) 65%, rgba(4, 18, 30, 0.15) 100%);
}

.hero-slide-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  /* 左下角再补一层局部暗角，进一步保证描述文字可读 */
  background:
    radial-gradient(ellipse at 15% 60%, rgba(2, 12, 20, 0.55) 0%, transparent 60%),
    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: auto, 60px 60px, 60px 60px;
}

/* Hero内容 */
.hero-content {
  position: relative;
  z-index: 10;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-2xl);
  max-width: var(--container-2xl);
  margin: 0 auto;
  gap: var(--spacing-3xl);
}

.hero-text {
  max-width: 680px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.hero-tag span {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-md);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 100px;
  backdrop-filter: blur(10px);
  /* 柔和双层阴影：近距离保证辨识度，远距离自然融入背景 */
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.45), 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero-tag span::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent-gold);
  border-radius: 50%;
}

.hero-title {
  font-size: 4rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.15;
  margin-bottom: var(--spacing-lg);
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

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

.hero-subtitle {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.8;
  max-width: 560px;
  /* 柔和双层阴影：提升照片背景上的可读性 */
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5), 0 2px 14px rgba(0, 0, 0, 0.35);
}

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

/* Hero右侧数据 */
.hero-stats {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  padding: var(--spacing-xl);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(20px);
  min-width: 200px;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-stat:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.hero-stat-num {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--white);
  font-family: var(--font-en);
  line-height: 1;
}

.hero-stat-num span {
  color: var(--accent-gold);
  font-size: 1.5rem;
}

.hero-stat-label {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.75);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 2px 10px rgba(0, 0, 0, 0.25);
}

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

.hero-indicator {
  width: 40px;
  height: 4px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.3);
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.hero-indicator.active,
.hero-indicator:hover {
  background: var(--accent-gold);
  width: 60px;
}

/* 滚动提示 */
.hero-scroll {
  position: absolute;
  bottom: 100px;
  left: var(--spacing-2xl);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
  z-index: 20;
  animation: bounce 2s infinite;
}

.hero-scroll svg {
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(8px);
  }
  60% {
    transform: translateY(4px);
  }
}

/* ==================== 关于我们 ==================== */
.about {
  background: var(--white);
  position: relative;
  overflow: hidden;
}

.about::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 40%;
  height: 100%;
  background: var(--gradient-glow);
  pointer-events: none;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4xl);
  align-items: center;
}

.about-image {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-2xl);
}

.about-image img {
  width: 100%;
  height: 520px;
  object-fit: cover;
}

.about-image-badge {
  position: absolute;
  bottom: var(--spacing-xl);
  left: var(--spacing-xl);
  background: var(--white);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.about-image-year {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--tech-blue);
  font-family: var(--font-en);
  line-height: 1;
}

.about-image-text {
  font-size: 0.9375rem;
  color: var(--gray-600);
  margin-top: var(--spacing-xs);
}

.about-content {
  position: relative;
  z-index: 1;
}

.about-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--gray-900);
  line-height: 1.25;
  margin-bottom: var(--spacing-lg);
}

.about-title span {
  color: var(--tech-blue);
}

.about-desc {
  font-size: 1.0625rem;
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
  padding: var(--spacing-xl);
  background: var(--gray-50);
  border-radius: var(--radius-lg);
}

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

.about-stat-num {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--tech-blue);
  font-family: var(--font-en);
  line-height: 1;
}

.about-stat-label {
  font-size: 0.9375rem;
  color: var(--gray-500);
}

.about-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--tech-blue);
  font-weight: 600;
  font-size: 1rem;
  transition: all var(--transition-fast);
}

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

.about-link svg {
  transition: transform var(--transition-fast);
}

.about-link:hover svg {
  transform: translateX(4px);
}

/* ==================== 产品中心 ==================== */
.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);
}

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

.product-card {
  position: relative;
  background: var(--white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  border: 1px solid var(--gray-100);
}

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

.product-card-main .product-card-image {
  position: relative;
  height: 260px;
  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: cover;
  transition: transform var(--transition-slow);
}

.product-card:hover .product-card-image img {
  transform: scale(1.05);
}

.product-card-badge {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--tech-blue);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 100px;
}

.product-card-badge-green {
  background: var(--eco-green);
}

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

.product-card-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--spacing-sm);
}

.product-card-desc {
  font-size: 1rem;
  color: var(--gray-500);
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
}

.product-feature-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.product-feature-list li {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--gray-700);
  font-size: 0.9375rem;
}

.product-feature-list li svg {
  color: var(--eco-green);
  flex-shrink: 0;
}

.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);
}

/* ==================== 行业解决方案 ==================== */
.solutions {
  background: var(--white);
}

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

.solution-card {
  position: relative;
  padding: var(--spacing-xl);
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-xl);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.solution-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.solution-card-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 102, 255, 0.08);
  color: var(--tech-blue);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
  transition: all var(--transition-normal);
}

.solution-card:hover .solution-card-icon {
  background: var(--gradient-tech);
  color: var(--white);
}

.solution-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--spacing-sm);
}

.solution-card-desc {
  font-size: 0.9375rem;
  color: var(--gray-500);
  line-height: 1.7;
  margin-bottom: var(--spacing-lg);
  flex: 1;
}

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

.solution-card-link::after {
  content: '';
  display: inline-block;
  width: 16px;
  height: 1.5px;
  background: currentColor;
  transition: width var(--transition-fast);
}

.solution-card:hover .solution-card-link {
  color: var(--eco-green);
}

.solution-card:hover .solution-card-link::after {
  width: 24px;
}

/* ==================== 核心技术优势 ==================== */
.technology {
  background: var(--gray-50);
  position: relative;
}

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

.tech-card {
  background: var(--white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  border: 1px solid var(--gray-100);
  transition: all var(--transition-normal);
  height: 100%;
}

.tech-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.tech-card-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-tech);
  color: var(--white);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
}

.tech-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--spacing-sm);
}

.tech-card-desc {
  font-size: 0.9375rem;
  color: var(--gray-500);
  line-height: 1.7;
}

/* ==================== 荣誉证书 ==================== */
.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 - 继承 common.css 基础样式并增强 */
.cert-carousel {
  position: relative;
  padding: var(--spacing-xl) 0 var(--spacing-3xl);
}

.cert-carousel-viewport {
  overflow: hidden;
  position: relative;
  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;
}

.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 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;
}

.cert-slide:not(.active) .cert-slide-inner {
  transform: scale(0.92);
  opacity: 0.6;
  filter: brightness(0.7) grayscale(0.2);
}

.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(0, 212, 170, 0.4),
    0 0 30px rgba(0, 212, 170, 0.1);
}

.cert-slide.active .cert-slide-inner::before {
  border-color: rgba(0, 212, 170, 0.6);
  box-shadow: inset 0 0 20px rgba(0, 212, 170, 0.05);
}

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

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

.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(6, 28, 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:hover {
  background: var(--tech-blue);
  border-color: var(--tech-blue);
  box-shadow: 0 0 20px rgba(0, 102, 255, 0.4);
}

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

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

.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(--accent-gold);
  box-shadow: 0 0 10px rgba(0, 212, 170, 0.5);
  transform: scale(1.2);
}

.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;
}

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

.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 var(--accent-gold);
  border-radius: var(--radius-lg);
  box-shadow: 0 0 40px rgba(0, 212, 170, 0.3), 0 20px 60px rgba(0, 0, 0, 0.5);
}

/* ==================== 客户案例 ==================== */
.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-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  display: block;
  text-decoration: none;
}

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

.case-card-image {
  position: relative;
  height: 280px;
  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;
  transition: transform var(--transition-slow);
}

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

.case-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(6, 28, 46, 0.9) 0%, rgba(6, 28, 46, 0.4) 50%, transparent 100%);
}

.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);
}

.case-card-action {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  background: rgba(6, 28, 46, 0.45);
  color: var(--white);
  font-size: 1rem;
  font-weight: 600;
  opacity: 0;
  transition: opacity var(--transition-normal);
  pointer-events: none;
}

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

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

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

/* ==================== 服务支持 ==================== */
.services {
  background: var(--gray-50);
  position: relative;
}

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

.service-card {
  position: relative;
  padding: var(--spacing-xl);
  background: var(--white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--gray-100);
  transition: all var(--transition-normal);
  height: 100%;
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.service-card-num {
  font-size: 3rem;
  font-weight: 700;
  color: var(--gray-100);
  font-family: var(--font-en);
  line-height: 1;
  margin-bottom: var(--spacing-md);
  transition: color var(--transition-normal);
}

.service-card:hover .service-card-num {
  color: var(--accent-gold);
  opacity: 0.3;
}

.service-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--spacing-sm);
}

.service-card-desc {
  font-size: 0.9375rem;
  color: var(--gray-500);
  line-height: 1.7;
}

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

/* 大屏幕 (1440px+) */
@media (min-width: 1440px) {
  .hero-title {
    font-size: 4.5rem;
  }
}

/* 平板 (1024px - 1439px) */
@media (max-width: 1439px) {
  .hero-title {
    font-size: 3.25rem;
  }

  .about-grid {
    gap: var(--spacing-3xl);
  }

  .about-image img {
    height: 460px;
  }

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

/* 小平板 (768px - 1023px) */
@media (max-width: 1023px) {
  .hero-title {
    font-size: 2.75rem;
  }

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

  .hero-content {
    flex-direction: column;
    justify-content: center;
    text-align: center;
    gap: var(--spacing-2xl);
  }

  .hero-text {
    max-width: 100%;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-btn {
    justify-content: center;
  }

  .hero-stats {
    flex-direction: row;
    width: 100%;
    max-width: 600px;
    justify-content: space-around;
    padding: var(--spacing-lg);
  }

  .hero-stat {
    padding-bottom: 0;
    border-bottom: none;
    align-items: center;
  }

  .hero-stat-num {
    font-size: 2rem;
  }

  .hero-scroll {
    display: none;
  }

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

  .about-image {
    max-width: 600px;
    margin: 0 auto;
  }

  .about-image img {
    height: 400px;
  }

  .about-content {
    text-align: center;
  }

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

  .cert-slide {
    flex: 0 0 calc(100% / 3);
  }
}

/* 手机 (< 768px) */
@media (max-width: 767px) {
  .hero {
    min-height: 600px;
  }

  .hero-title {
    font-size: 2.25rem;
  }

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

  .hero-btn {
    flex-direction: column;
    gap: var(--spacing-md);
    width: 100%;
  }

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

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

  .hero-stat {
    flex-direction: row;
    justify-content: space-between;
    width: 100%;
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .hero-stat:last-child {
    border-bottom: none;
  }

  .hero-indicators {
    bottom: 30px;
  }

  .about-title,
  .section-title,
  .cta-title {
    font-size: 1.75rem;
  }

  .about-image img {
    height: 300px;
  }

  .about-stats {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .product-card-image,
  .case-card-image {
    height: 220px;
  }

  .cert-carousel-viewport {
    margin: 0 48px;
  }

  .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;
  }
}

/* 超小屏幕 (< 480px) */
@media (max-width: 479px) {
  .hero-title {
    font-size: 1.875rem;
  }

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

  .about-stats {
    grid-template-columns: 1fr;
  }

  .about-image-badge {
    padding: var(--spacing-sm) var(--spacing-lg);
  }

  .about-image-year {
    font-size: 2rem;
  }

  .service-card-num {
    font-size: 2.5rem;
  }
}

/* 移动端禁用悬停效果 */
@media (hover: none) {
  .case-card:hover .case-card-image img {
    transform: none;
  }

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

/* ==================== 打印样式 ==================== */
@media print {
  .hero-indicators,
  .hero-scroll,
  .cert-carousel-arrow,
  .cert-carousel-dots {
    display: none !important;
  }

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