/* ========================================
   关于我们页专属样式
   ======================================== */

/* ==================== 页面过渡遮罩（新闻列表跳转用） ==================== */
.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;
}

/* ==================== 公司介绍 ==================== */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.about-intro-image {
  height: 450px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

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

.about-intro-content {
  padding: var(--spacing-xl) 0;
}

.about-intro-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: var(--spacing-lg);
}

.about-intro-text {
  font-size: 1.0625rem;
  color: var(--gray-600);
  line-height: 1.9;
  margin-bottom: var(--spacing-lg);
}

/* ==================== 技术实力证书展示 ==================== */
.tech-strength {
  background: var(--gray-50);
}

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

.tech-cert-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.tech-cert-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.tech-cert-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--tech-blue);
  font-family: var(--font-en);
  margin-bottom: var(--spacing-sm);
}

.tech-cert-label {
  font-size: 0.9375rem;
  color: var(--gray-600);
}

/* ==================== 新闻动态 ==================== */
.news-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.news-item {
  display: flex;
  gap: var(--spacing-xl);
  padding: var(--spacing-xl);
  padding-right: calc(var(--spacing-xl) + 48px);
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  text-decoration: none;
  color: inherit;
  position: relative;
}

.news-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateX(5px);
}

.news-item::after {
  content: '';
  position: absolute;
  right: var(--spacing-xl);
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  background: var(--gray-100);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all var(--transition-fast);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%232563eb' stroke-width='2'%3E%3Cpath d='M5 12h14M12 5l7 7-7 7'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}

.news-item:hover::after {
  opacity: 1;
  background: var(--tech-blue);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='2'%3E%3Cpath d='M5 12h14M12 5l7 7-7 7'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}

.news-item-image {
  flex-shrink: 0;
  width: 200px;
  height: 140px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

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

.news-item-content {
  flex: 1;
}

.news-item-date {
  font-size: 0.875rem;
  color: var(--gray-500);
  margin-bottom: var(--spacing-sm);
}

.news-item-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: var(--spacing-sm);
  transition: color var(--transition-fast);
}

.news-item:hover .news-item-title {
  color: var(--tech-blue);
}

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

/* ==================== 联系我们表单 ==================== */
.contact-section {
  background: var(--gray-50);
}

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

.contact-qr-card {
  background: var(--white);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.contact-qr-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: var(--spacing-sm);
}

.contact-qr-desc {
  font-size: 0.9375rem;
  color: var(--gray-600);
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
}

.contact-qr-image-wrap {
  position: relative;
  width: 240px;
  height: 240px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  margin-bottom: var(--spacing-lg);
}

.contact-qr-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.contact-qr-placeholder {
  position: absolute;
  inset: 0;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  color: var(--gray-500);
  font-size: 0.875rem;
  text-align: center;
  padding: var(--spacing-md);
}

.contact-qr-placeholder svg {
  color: var(--tech-blue);
  opacity: 0.6;
}

.contact-qr-tips {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(0, 168, 120, 0.08);
  border-radius: var(--radius-full);
  color: var(--eco-green);
  font-size: 0.875rem;
  font-weight: 500;
}

.contact-qr-tips svg {
  flex-shrink: 0;
}

.contact-info {
  padding: var(--spacing-xl) 0;
}

.contact-info-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: var(--spacing-xl);
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-lg);
}

.contact-info-icon {
  width: 50px;
  height: 50px;
  background: rgba(37, 99, 235, 0.1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-info-icon svg {
  width: 24px;
  height: 24px;
  color: var(--tech-blue);
}

.contact-info-content h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: var(--spacing-xs);
}

.contact-info-content p {
  font-size: 0.9375rem;
  color: var(--gray-600);
  line-height: 1.6;
}

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

/* 小平板 (768px - 1023px) */
@media (max-width: 1023px) {
  .about-intro,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

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

  .news-item {
    flex-direction: column;
    padding-right: var(--spacing-xl);
  }

  .news-item::after {
    display: none;
  }

  .news-item-image {
    width: 100%;
    height: 180px;
  }
}

/* 手机 (< 768px) */
@media (max-width: 767px) {
  .about-intro-title {
    font-size: 1.5rem;
  }

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

  .tech-strength-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }

  .tech-cert-number {
    font-size: 2rem;
  }

  .contact-qr-card {
    padding: var(--spacing-lg);
  }

  .contact-qr-image-wrap {
    width: 200px;
    height: 200px;
  }

  .contact-qr-title {
    font-size: 1.25rem;
  }
}

/* 超小屏幕 (< 480px) */
@media (max-width: 479px) {
  .tech-strength-grid {
    grid-template-columns: 1fr;
  }
}