/* 资源与社区页面专用样式 */

.database-section {
  padding: 4rem 0;
  background: var(--bg-light);
}

.database-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.stat-card {
  background: #fff;
  padding: 2rem;
  border-radius: 10px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

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

.stat-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 1rem;
  background: linear-gradient(135deg, var(--secondary-color), #764ba2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #fff;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: bold;
  color: var(--secondary-color);
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--text-light);
  font-size: 0.9rem;
}

.database-search {
  background: #fff;
  padding: 2rem;
  border-radius: 10px;
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
}

.search-box {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.search-box input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: 5px;
  font-size: 1rem;
  transition: var(--transition);
}

.search-box input:focus {
  outline: none;
  border-color: var(--secondary-color);
}

.search-btn {
  padding: 0.75rem 2rem;
  background: var(--secondary-color);
  color: #fff;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 1rem;
  transition: var(--transition);
}

.search-btn:hover {
  background: #2980b9;
}

.search-filters {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.search-filters select {
  flex: 1;
  min-width: 150px;
  padding: 0.75rem;
  border: 2px solid var(--border-color);
  border-radius: 5px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
}

.search-filters select:focus {
  outline: none;
  border-color: var(--secondary-color);
}

.database-results {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.result-item {
  background: #fff;
  padding: 1.5rem;
  border-radius: 10px;
  box-shadow: var(--shadow);
  display: flex;
  gap: 1.5rem;
  transition: var(--transition);
}

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

.result-icon {
  width: 50px;
  height: 50px;
  background: var(--bg-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--secondary-color);
  flex-shrink: 0;
}

.result-content {
  flex: 1;
}

.result-content h3 {
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.result-meta {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.result-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
}

.tag {
  background: var(--bg-light);
  color: var(--secondary-color);
  padding: 0.3rem 0.8rem;
  border-radius: 15px;
  font-size: 0.85rem;
  border: 1px solid var(--secondary-color);
}

.view-details {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--secondary-color);
  text-decoration: none;
  font-weight: bold;
  transition: var(--transition);
}

.view-details:hover {
  gap: 1rem;
  color: var(--primary-color);
}

/* 研究机构区域 */
.institutions-section {
  padding: 4rem 0;
  background: #fff;
}

.institutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.institution-card {
  background: #fff;
  padding: 2rem;
  border-radius: 10px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  text-align: center;
}

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

.institution-logo {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  background: linear-gradient(135deg, var(--secondary-color), #764ba2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: #fff;
}

.institution-card h3 {
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.institution-type {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.institution-focus {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.institution-contact {
  background: var(--bg-light);
  padding: 1rem;
  border-radius: 5px;
  margin-bottom: 1rem;
  text-align: left;
}

.institution-contact p {
  color: var(--text-light);
  font-size: 0.9rem;
  margin: 0.5rem 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.institution-contact i {
  color: var(--secondary-color);
}

/* 社区互动区域 */
.community-section {
  padding: 4rem 0;
  background: var(--bg-light);
}

.community-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: #fff;
  padding: 2rem;
  border-radius: 10px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

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

.feature-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--secondary-color), #764ba2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #fff;
  margin-bottom: 1.5rem;
}

.feature-card h3 {
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.feature-list {
  list-style: none;
  padding-left: 0;
  margin: 1rem 0;
}

.feature-list li {
  padding: 0.5rem 0;
  color: var(--text-light);
  position: relative;
  padding-left: 1.5rem;
}

.feature-list li::before {
  content: "•";
  color: var(--secondary-color);
  font-weight: bold;
  position: absolute;
  left: 0;
}

.upcoming-events {
  margin: 1rem 0;
}

.event-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem;
  background: var(--bg-light);
  border-radius: 5px;
  margin-bottom: 0.5rem;
}

.event-date {
  color: var(--secondary-color);
  font-weight: bold;
  font-size: 0.9rem;
}

.event-title {
  color: var(--text-color);
  font-size: 0.9rem;
}

/* 多媒体图书馆区域 */
.media-library-section {
  padding: 4rem 0;
  background: #fff;
}

.media-tabs {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.media-tab {
  padding: 0.75rem 1.5rem;
  background: var(--bg-light);
  border: 2px solid var(--border-color);
  border-radius: 5px;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1rem;
  color: var(--text-color);
}

.media-tab:hover,
.media-tab.active {
  background: var(--secondary-color);
  color: #fff;
  border-color: var(--secondary-color);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.media-item {
  background: #fff;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.media-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.media-thumbnail {
  position: relative;
  width: 100%;
  height: 200px;
  overflow: hidden;
}

.media-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.play-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

.media-item:hover .play-overlay {
  opacity: 1;
}

.play-overlay i {
  font-size: 3rem;
  color: #fff;
}

.media-info {
  padding: 1.5rem;
}

.media-info h3 {
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.media-meta {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.media-info p {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.watch-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--secondary-color);
  text-decoration: none;
  font-weight: bold;
  transition: var(--transition);
}

.watch-btn:hover {
  gap: 1rem;
  color: var(--primary-color);
}

/* 实用工具区域 */
.tools-section {
  padding: 4rem 0;
  background: var(--bg-light);
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.tool-card {
  background: #fff;
  padding: 2rem;
  border-radius: 10px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

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

.tool-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--secondary-color), #764ba2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #fff;
  margin-bottom: 1.5rem;
}

.tool-card h3 {
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.tool-card > p {
  color: var(--text-light);
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.tool-demo {
  background: var(--bg-light);
  padding: 1.5rem;
  border-radius: 5px;
  margin-top: 1rem;
}

.converter-box {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.converter-input,
.converter-select {
  flex: 1;
  min-width: 120px;
  padding: 0.5rem;
  border: 2px solid var(--border-color);
  border-radius: 5px;
  font-size: 0.9rem;
}

.converter-input:focus,
.converter-select:focus {
  outline: none;
  border-color: var(--secondary-color);
}

.equals {
  font-size: 1.2rem;
  font-weight: bold;
  color: var(--secondary-color);
}

.timeline-form,
.citation-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  color: var(--text-color);
  font-size: 0.9rem;
  font-weight: bold;
}

.form-input {
  padding: 0.5rem;
  border: 2px solid var(--border-color);
  border-radius: 5px;
  font-size: 0.9rem;
  transition: var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--secondary-color);
}

.journal-search {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.journal-search input {
  flex: 1;
  padding: 0.5rem;
  border: 2px solid var(--border-color);
  border-radius: 5px;
  font-size: 0.9rem;
}

.journal-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.journal-item {
  padding: 0.75rem;
  background: #fff;
  border-radius: 5px;
  border-left: 3px solid var(--secondary-color);
}

.journal-item strong {
  color: var(--primary-color);
  display: block;
  margin-bottom: 0.25rem;
}

.journal-item p {
  color: var(--text-light);
  font-size: 0.85rem;
  margin: 0;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .database-stats,
  .institutions-grid,
  .community-features,
  .media-grid,
  .tools-grid {
    grid-template-columns: 1fr;
  }

  .search-box {
    flex-direction: column;
  }

  .search-filters {
    flex-direction: column;
  }

  .result-item {
    flex-direction: column;
  }

  .result-icon {
    align-self: flex-start;
  }

  .media-tabs {
    flex-direction: column;
  }

  .media-tab {
    width: 100%;
  }

  .converter-box {
    flex-direction: column;
  }

  .converter-input,
  .converter-select {
    width: 100%;
  }

  .equals {
    transform: rotate(90deg);
  }
}