/* 关于我们页面样式 */

/* ========== 关于Banner ========== */
.about-banner {
  background-image: url('/images/about/hero-about.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  width: 100%;
  height: 41.67vw; /* 12:5 比例（1920:800），高度 = 宽度 * 5/12 */
  min-height: 400px;
  aspect-ratio: 12 / 5;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--color-white);
  position: relative;
  overflow: hidden;
  padding: 0;
}

.about-banner .container {
  position: relative;
  z-index: 1;
  padding: 0 20px;
}

.about-banner .banner__title {
  font-size: var(--font-size-h1);
  font-weight: var(--font-weight-bold);
  margin-bottom: 20px;
  color: var(--color-white);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.about-banner .banner__subtitle {
  font-size: var(--font-size-h4);
  opacity: 0.95;
  color: rgba(255, 255, 255, 0.95);
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ========== 锚点导航 ========== */
.about-nav {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-300);
  position: sticky;
  top: 80px;
  z-index: 100;
}

.about-nav .anchor-nav {
  display: flex;
  gap: 40px;
  padding: 20px 0;
  justify-content: center;
}

.about-nav .anchor-nav__item {
  padding: 8px 0;
  color: var(--color-gray-600);
  text-decoration: none;
  font-weight: var(--font-weight-semibold);
  border-bottom: 2px solid transparent;
  transition: all var(--transition-base);
  font-size: var(--font-size-h6);
}

.about-nav .anchor-nav__item:hover,
.about-nav .anchor-nav__item.active {
  color: var(--color-primary-dark);
  border-bottom-color: var(--color-primary-dark);
}

/* ========== 关于区块 ========== */
.about-section {
  padding: 80px 0;
  background: var(--color-white);
  position: relative;
}

/* 页面背景网格纹理 */
.about-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(rgba(232, 245, 233, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(232, 245, 233, 0.03) 1px, transparent 1px);
  background-size: 20px 20px;
  pointer-events: none;
  z-index: 0;
}

.about-section .container {
  position: relative;
  z-index: 1;
  padding-left: 100px;
  padding-right: 100px;
}

@media (max-width: 1440px) {
  .about-section .container {
    padding-left: 60px;
    padding-right: 60px;
  }
}

@media (max-width: 1200px) {
  .about-section .container {
    padding-left: 40px;
    padding-right: 40px;
  }
}

.about-section--gray {
  background: var(--color-gray-50);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-bold);
  color: var(--color-gray-900);
  margin-bottom: 16px;
}

.section-header p {
  font-size: var(--font-size-h5);
  color: var(--color-gray-600);
}

/* ========== 公司简介 ========== */
.about-intro {
  display: flex;
  gap: 40px;
  align-items: flex-start;
}

.intro-content {
  flex: 1;
}

/* 内容块样式 */
.content-block {
  background: #F9FCF9;
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 30px;
  transition: box-shadow var(--transition-base);
}

.content-block:hover {
  box-shadow: 0 4px 12px rgba(46, 125, 50, 0.1);
}

.content-block:last-child {
  margin-bottom: 0;
}

/* 标题样式 */
.content-block__title {
  font-size: 24px;
  font-weight: var(--font-weight-bold);
  color: #1B5E20;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.title-icon {
  font-size: 20px;
  display: inline-flex;
  align-items: center;
}

/* 标题装饰线 */
.title-decoration {
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, #2E7D32, #4CAF50);
  margin-bottom: 20px;
  border-radius: 2px;
}

.intro-text {
  font-size: var(--font-size-body);
  color: var(--color-gray-700);
  line-height: 1.8;
  margin-bottom: 0;
}

.intro-text strong {
  color: #1B5E20;
  font-weight: var(--font-weight-bold);
}

.mission-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.mission-list li {
  padding: 8px 0;
  padding-left: 20px;
  font-size: 16px;
  color: var(--color-gray-700);
  line-height: 1.8;
  position: relative;
}

.mission-list li::before {
  content: '■';
  color: #4CAF50;
  position: absolute;
  left: 0;
  font-size: 12px;
}

.mission-list strong {
  color: #1B5E20;
  font-weight: var(--font-weight-bold);
}

/* 专注领域 */
.focus-areas {
  display: flex;
  gap: 24px;
  margin-top: 24px;
}

.focus-item {
  flex: 1;
  background: var(--color-gray-50);
  padding: 24px;
  border-radius: var(--radius-medium);
  text-align: center;
}

.focus-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.focus-item h4 {
  font-size: var(--font-size-h5);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-900);
  margin-bottom: 8px;
}

.focus-item p {
  font-size: var(--font-size-small);
  color: var(--color-gray-600);
}

/* 信息框 */
.intro-info-box {
  flex-shrink: 0;
  width: 400px;
  background: linear-gradient(135deg, #F0F9F0 0%, #F9FCF9 100%);
  padding: 32px;
  border-radius: var(--radius-large);
  position: relative;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  overflow: hidden;
}

/* 渐变边框使用伪元素实现 */
.intro-info-box::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(135deg, #2E7D32, #4CAF50);
  border-radius: var(--radius-large);
  z-index: -1;
}

.intro-info-box::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, #F0F9F0 0%, #F9FCF9 100%);
  border-radius: calc(var(--radius-large) - 2px);
  z-index: -1;
}

.intro-info-box:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 24px rgba(46, 125, 50, 0.15);
}

.intro-info-box h3 {
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-900);
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}

.info-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 16px 0;
  border-bottom: 1px solid rgba(46, 125, 50, 0.1);
  position: relative;
  z-index: 1;
}

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

.info-label {
  font-size: var(--font-size-small);
  color: #1B5E20;
  font-weight: var(--font-weight-bold);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.info-icon {
  font-size: 14px;
}

.info-value {
  font-size: var(--font-size-small);
  color: #666;
  text-align: left;
  line-height: 1.6;
}

.info-link {
  color: #2E7D32;
  text-decoration: none;
  transition: color var(--transition-base);
}

.info-link:hover {
  color: #1B5E20;
  text-decoration: underline;
}

/* ========== 荣誉资质 ========== */
.honors-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-5);
  max-width: 600px;
  margin: 0 auto;
}

.honor-card {
  background: var(--color-white);
  border-radius: var(--radius-large);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

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

.honor-card__image {
  height: 200px;
  overflow: hidden;
}

.honor-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.honor-card__content {
  padding: var(--spacing-4);
}

.honor-card__badge {
  display: inline-block;
  background: #FEF3C7;
  color: #92400E;
  padding: 4px 12px;
  border-radius: var(--radius-small);
  font-size: var(--font-size-tiny);
  margin-bottom: 12px;
}

.honor-card__title {
  font-size: var(--font-size-h5);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-900);
  margin-bottom: 16px;
}

.honor-card__info {
  font-size: var(--font-size-small);
  color: var(--color-gray-700);
  line-height: var(--line-height-relaxed);
}

.honor-card__info p {
  margin-bottom: 8px;
}

/* ========== 交流活动 ========== */
.cooperation-block {
  margin-bottom: 60px;
}

.cooperation-block:last-child {
  margin-bottom: 0;
}

.cooperation-block h3 {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-900);
  margin-bottom: 32px;
  text-align: center;
}

.activity-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.activity-item {
  text-align: center;
}

.activity-item img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  border-radius: var(--radius-medium);
  margin-bottom: 16px;
  transition: transform var(--transition-base);
}

.activity-item:hover img {
  transform: scale(1.05);
}

.activity-item p {
  font-size: var(--font-size-small);
  color: var(--color-gray-700);
  font-weight: var(--font-weight-semibold);
}

/* 学术合作 */
.academic-partners {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.partner-item {
  text-align: center;
  padding: 24px;
  background: var(--color-white);
  border-radius: var(--radius-medium);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.partner-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.partner-logo {
  width: 120px;
  height: 120px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-gray-50);
  border-radius: 50%;
}

.partner-logo img {
  max-width: 80px;
  max-height: 80px;
  object-fit: contain;
}

.partner-item h4 {
  font-size: var(--font-size-h5);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-900);
  margin-bottom: 8px;
}

.partner-item p {
  font-size: var(--font-size-small);
  color: var(--color-gray-600);
  line-height: var(--line-height-relaxed);
}

/* ========== 合作单位Logo墙 ========== */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}

.partner-logo-item {
  background: var(--color-white);
  padding: 40px;
  border-radius: var(--radius-medium);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
  border: 1px solid var(--color-gray-200);
}

.partner-logo-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.partner-logo-item img {
  max-width: 100%;
  max-height: 60px;
  object-fit: contain;
  filter: grayscale(100%);
  opacity: 0.6;
  transition: all var(--transition-base);
}

.partner-logo-item:hover img {
  filter: grayscale(0%);
  opacity: 1;
}

/* ========== 响应式设计 ========== */
@media (max-width: 767px) {
  .about-banner {
    min-height: 400px;
    padding: 0;
  }

  .about-banner .banner__title {
    font-size: var(--font-size-h2);
    margin-bottom: 16px;
  }

  .about-banner .banner__subtitle {
    font-size: var(--font-size-h6);
  }

  .about-nav {
    top: 60px;
  }

  .about-nav .anchor-nav {
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
  }

  .about-nav .anchor-nav__item {
    font-size: var(--font-size-small);
  }

  .about-section {
    padding: 60px 0;
  }

  .about-section .container {
    padding-left: 20px;
    padding-right: 20px;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .section-header h2 {
    font-size: var(--font-size-h3);
  }

  .section-header p {
    font-size: var(--font-size-h6);
  }

  .about-intro {
    flex-direction: column;
    gap: 30px;
  }

  .content-block {
    margin-bottom: 20px;
  }

  .content-block__title {
    font-size: 20px;
  }

  .intro-info-box {
    width: 100%;
  }

  .focus-areas {
    flex-direction: column;
  }

  .honors-grid {
    grid-template-columns: 1fr;
    max-width: 100%;
  }

  .activity-gallery {
    grid-template-columns: 1fr;
  }

  .academic-partners {
    grid-template-columns: 1fr;
  }

  .partners-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .partner-logo-item {
    padding: 24px;
  }
}

@media (min-width: 768px) and (max-width: 1199px) {
  .about-section .container {
    padding-left: 40px;
    padding-right: 40px;
  }

  .about-intro {
    flex-direction: column;
    gap: 30px;
  }

  .intro-info-box {
    width: 100%;
  }

  .honors-grid {
    grid-template-columns: 1fr;
    max-width: 100%;
  }

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

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

  .partners-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ========== 大屏幕优化（1920px及以上） ========== */
@media (min-width: 1920px) {
  .about-banner {
    height: 800px; /* 1920px宽度时，高度为800px，保持12:5比例（1920:800） */
  }
}