/* ============================================
   联盟页面专用样式
   ============================================ */

/* 联盟介绍 */
.alliance-intro {
  padding: var(--spacing-xl) 0;
  background: var(--light-gray);
}

.intro-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.intro-content p {
  font-size: var(--font-lg);
  line-height: 1.8;
  color: var(--dark-gray);
  margin-bottom: var(--spacing-md);
}

/* 照片墙区域 */
.gallery-section {
  padding: var(--spacing-xxl) 0;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.gallery-item {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.gallery-item:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-lg);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-slow);
}

.gallery-item:hover img {
  transform: scale(1.1);
}

.gallery-item-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.6) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition-normal);
  display: flex;
  align-items: flex-end;
  padding: var(--spacing-md);
}

.gallery-item:hover .gallery-item-overlay {
  opacity: 1;
}

.gallery-item-title {
  color: var(--white);
  font-size: var(--font-md);
  font-weight: 500;
}

/* 图片查看器 */
.image-viewer {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 9999;
  display: none;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.image-viewer.active {
  display: block;
  opacity: 1;
}

.viewer-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(10px);
}

.viewer-content {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.viewer-close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  width: 50px;
  height: 50px;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  outline: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: all var(--transition-fast);
}

.viewer-close:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: rotate(90deg);
}

.viewer-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  outline: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: all var(--transition-fast);
}

.viewer-nav:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-50%) scale(1.1);
}

.viewer-prev {
  left: var(--spacing-md);
}

.viewer-next {
  right: var(--spacing-md);
}

.viewer-image-container {
  max-width: 90%;
  max-height: 85%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.viewer-image-container img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  animation: zoomIn 0.3s ease;
}

.viewer-counter {
  position: absolute;
  bottom: var(--spacing-md);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: 20px;
  font-size: var(--font-sm);
  backdrop-filter: blur(10px);
}

/* 响应式设计 - 平板 */
@media (max-width: 1024px) {
  .gallery-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-sm);
  }

  .intro-content p {
    font-size: var(--font-md);
  }
}

/* 响应式设计 - 手机 */
@media (max-width: 768px) {
  .alliance-intro {
    padding: var(--spacing-lg) 0;
  }

  .intro-content p {
    font-size: var(--font-md);
    text-align: left;
  }

  .gallery-section {
    padding: var(--spacing-lg) 0;
  }

  .gallery-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--spacing-xs);
  }

  .gallery-item-overlay {
    opacity: 1;
  }

  .gallery-item-title {
    font-size: var(--font-sm);
  }

  .viewer-nav {
    width: 40px;
    height: 40px;
  }

  .viewer-nav svg {
    width: 24px;
    height: 24px;
  }

  .viewer-close {
    width: 40px;
    height: 40px;
  }

  .viewer-close svg {
    width: 24px;
    height: 24px;
  }

  .viewer-image-container {
    max-width: 95%;
    max-height: 80%;
  }

  .viewer-counter {
    font-size: var(--font-xs);
  }
}

/* 动画 */
@keyframes zoomIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}