/* 全局变量 */
:root {
  --main-bg: #f8fafc;
  --header-bg: #ffffff;
  --card-bg: #ffffff;
  --primary: #3b82f6;
  --secondary: #64748b;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --border-radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --gray-color: #64748b;
  --border-color: #e2e8f0;
  --primary-color: #3b82f6;
  --secondary-color: #2563eb;
}
/* 全局重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', system-ui, sans-serif;
}
body {
  background: var(--main-bg);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  padding-top: 70px;
}
/* 头部导航 */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--header-bg);
  box-shadow: 0 1px 3px rgba(0, 0, 0.1);
  z-index: 1000;
  padding: 0 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
  transition: var(--transition);
}
header .logo-link {
  display: flex;
  align-items: center;
  height: 100%;
  text-decoration: none;
  margin-right: 20px;
  padding: 8px 12px;
  border-radius: 8px;
  transition: background 0.2s;
}
header .logo-link:hover {
  background: #f1f5f9;
}
header .logo-img {
  height: 40px;
  max-width: 120px;
  border-radius: 8;
  display: block;
  transition: transform 0.3s ease, filter 0.3s ease;
  filter: brightness(0) saturate(100%);
  -webkit-filter: brightness(0) saturate(100%);
}
header .logo-img:hover {
  transform: scale(1.05);
  filter: brightness(0.2) saturate(100%);
  -webkit-filter: brightness(0.2) saturate(100%);
}
.nav-links {
  display: flex;
  gap: 24px;
  align-items: center;
}
.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  transition: var(--transition);
  padding: 8px 0;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
  border-bottom: 2px solid var(--primary);
}
/* 页脚 */
.footer {
  text-align: center;
  padding: 30px 0;
  color: var(--gray-color);
  font-size: 0.9rem;
  border-top: 1px solid var(--border-color);
  margin-top: 40px;
}
.footer-links a {
  color: var(--primary-color);
  text-decoration: none;
  margin: 0 10px;
  transition: color 0.2s;
}
.footer-links a:hover {
  color: var(--secondary-color);
  text-decoration: underline;
}
.copyright {
  margin-top: 8px;
  color: #64748b;
  font-size: 0.85rem;
  line-height: 1.5;
}
/* 搜索区域 */
.search-container {
  max-width: 700px;
  width: 90%;
  margin: 20px auto 40px;
  position: relative;
}
.search-container h5 {
  margin-top: 10px;
  color: #dc2626;
  font-weight: 500;
  font-size: 0.88rem;
}
.search-box {
  display: flex;
  background: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 6px rgba(0, 0, 0.05);
  overflow: hidden;
  border: 1px solid #e2e8f0;
  transition: var(--transition);
  height: 56px;
}
.search-input {
  flex: 1;
  padding: 0 20px;
  border: none;
  background: transparent;
  font-size: 1.1rem;
  color: var(--text-primary);
  outline: none;
  width: 100%;
  height: 100%;
}
.search-input::placeholder {
  color: var(--text-secondary);
  opacity: 0.7;
}
.search-btn {
  background: var(--primary);
  color: white;
  border: none;
  padding: 0 24px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
  height: 100%;
  white-space: nowrap;
}
.search-btn:hover {
  background: #2563eb;
}
.search-btn i {
  font-size: 1.1rem;
  min-width: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.filter-btn {
  background: var(--card-bg);
  color: var(--text-primary);
  border: 1px solid #e2e8f0;
  border-left: none;
  padding: 0 16px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
  height: 100%;
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  white-space: nowrap;
}
.filter-btn:hover {
  background: #f1f5f9;
}
.filter-btn.active {
  background: #eff6ff;
  color: var(--primary);
  border-color: var(--primary);
}
.filter-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: 0 12px 30px rgba(0, 0, 0.12);
  border: 1px solid #e2e8f0;
  z-index: 100;
  display: none;
  overflow: hidden;
  min-width: 180px;
}
.filter-dropdown.show {
  display: block;
  animation: fadeIn 0.2s ease;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}
.filter-option {
  padding: 12px 16px;
  cursor: pointer;
  transition: background 0.2s;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
}
.filter-option:hover {
  background: #f1f5f9;
}
.filter-option.active {
  background: #eff6ff;
  color: var(--primary);
  font-weight: 600;
}
.filter-option-icon {
  width: 18px;
  height: 18px;
  object-fit: contain;
}
/* 主内容容器 */
.content-wrapper {
  max-width: 1200px;
  width: 90%;
  margin: 0 auto 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 30px;
}
.section-title {
  width: 100%;
  text-align: left;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid #e2e8f0;
}
/* 推荐卡片网格 - 已修复 */
.recommendations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 24px;
  width: 100%;
  grid-auto-rows: 1fr;
}
.recommend-card {
  background: var(--card-bg);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 4px 6px rgba(0, 0, 0.05);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  height: 100%;
  border: 1px solid #e2e8f0;
}
.recommend-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 15px rgba(0, 0, 0.1);
}
.card-icon {
  width: 100%;
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f1f5f9;
  font-size: 3.5rem;
  color: var(--primary);
}
.card-content {
  padding: 24px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}
.card-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.4;
}
.card-desc {
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.6;
  font-size: 1rem;
  flex-grow: 1;
}
/* 自定义卡片LOGO：放在按钮上方，支持大小不一致 */
.card-logo {
  width: auto;
  height: auto;
  margin: 16px 0;
  align-self: center;
  /* 每个卡片可单独设置宽高，实现大小不一 */
}
.card-logo.img1 { width: 160px; height: 160px; }
/* 可继续新增 .img3 .img4 等自定义不同尺寸 */
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  align-self: flex-start;
  padding: 10px 20px;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  font-size: 1rem;
  margin-top: auto;
}
.card-link:hover {
  background: #f1f5f9;
  transform: translateX(3px);
}
/* 搜索结果 */
.search-results {
  width: 100%;
  display: none;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 20px;
}
.result-item {
  background: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 6px rgba(0, 0, 0.05);
  transition: var(--transition);
  border: 1px solid #e2e8f0;
  width: 100%;
  aspect-ratio: 1 / 1;
  position: relative;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  overflow: hidden;
}
.result-item-inner {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 16px;
}
.result-system-icon {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 24px;
  height: 24px;
  background: rgba(255, 255, 0.9);
  border-radius: 4px;
  padding: 3px;
  box-shadow: 0 2px 4px rgba(0, 0, 0.1);
  z-index: 10;
}
.result-system-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.result-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: center;
  line-height: 1.4;
  width: 100%;
  height: 2.8em;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  margin: 24px 0 12px 0;
  transition: var(--transition);
  flex-shrink: 0;
  word-break: break-word;
}
.result-item:hover .result-title {
  color: var(--primary);
}
.result-icon-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  margin-bottom: 8px;
  flex-shrink: 0;
}
.result-icon {
  max-width: 70%;
  max-height: 70%;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: 8px;
  transition: transform 0.3s ease;
}
.result-item:hover .result-icon {
  transform: scale(1.08);
}
.highlight {
  background: #fef3c7;
  padding: 0 4px;
  border-radius: 2px;
  font-weight: 600;
}
.action-btn {
  background: var(--primary);
  color: white;
  border: none;
  padding: 14px 30px;
  font-size: 1.1rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 15px;
}
.action-btn:hover {
  background: #2563eb;
  transform: translateY(-2px);
}
.back-btn {
  background: white;
  color: var(--primary);
  border: 1px solid var(--primary);
  font-weight: 600;
}
.back-btn:hover {
  background: #f1f5f9;
}
.empty-state {
  text-align: center;
  padding: 40px 20px;
  width: 100%;
  background: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 6px rgba(0, 0, 0.05);
  grid-column: 1 / -1;
}
.empty-icon {
  font-size: 3.5rem;
  margin-bottom: 20px;
  color: var(--primary);
}
.empty-title {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}
.empty-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto 20px;
}
.error-notice {
  text-align: center;
  padding: 20px;
  background: #fee2e2;
  border-radius: var(--border-radius);
  color: #dc2626;
  border: 1px solid #fecaca;
  margin: 20px 0;
  grid-column: 1 / -1;
}
.error-notice i {
  font-size: 2rem;
  margin-bottom: 10px;
  color: #ef4444;
}
.result-count {
  text-align: center;
  color: var(--text-secondary);
  margin-top: 20px;
  font-size: 0.95rem;
  grid-column: 1 / -1;
}
.pagination-container {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 30px;
  padding: 20px 0;
  flex-wrap: wrap;
  grid-column: 1 / -1;
}
.pagination-btn {
  padding: 8px 12px;
  border: 1px solid var(--primary);
  background: white;
  color: var(--primary);
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s ease;
  min-width: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.pagination-btn:hover:not(:disabled) {
  background: #f1f5f9;
}
.pagination-btn:disabled {
  background: #f1f5f9;
  color: #94a3b8;
  cursor: not-allowed;
  border-color: #cbd5e1;
  opacity: 0.7;
}
.pagination-btn.active {
  background: var(--primary);
  color: white;
  font-weight: bold;
  border-color: var(--primary);
}
/* 主题切换按钮 */
.theme-toggle {
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 1.1rem;
  cursor: pointer;
  transition: var(--transition);
  margin-right: 20px;
}
.theme-toggle:hover {
  background: #f1f5f9;
  color: var(--primary);
}
/* 深色主题 */
body.dark {
  --main-bg: #0f172a;
  --header-bg: #1e293b;
  --card-bg: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b;
  --border-color: #334155;
  --gray-color: #94a3b8;
}
body.dark .theme-toggle:hover {
  background: #334155;
}
body.dark header .logo-img {
  filter: brightness(0) invert(1) saturate(100%);
  -webkit-filter: brightness(0) invert(1) saturate(100%);
}
body.dark header .logo-img:hover {
  filter: brightness(0.2) invert(1) saturate(100%);
  -webkit-filter: brightness(0.2) saturate(100%);
}
body.dark header .logo-link:hover {
  background: #334155;
}
body.dark .highlight {
  background: #854d0e;
  color: #fef3c7;
}
/* 响应式 平板 */
@media (max-width: 900px) {
  .recommendations-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .search-box { flex-direction: column; height: auto; }
  .search-btn { width: 100%; border-radius: 0; padding: 14px; height: auto; justify-content: center; }
  .filter-btn { width: 100%; border-radius: 0 0 var(--border-radius) var(--border-radius); border-left: 1px solid #e2e8f0; border-top: none; justify-content: center; height: auto; padding:12px; }
  .filter-dropdown { right: auto; left: 50%; transform: translateX(-50%); }
  header .logo-link { margin-right: 0; }
  header .logo-img { height: 36px; }
  .pagination-container { gap: 6px; padding: 15px 0; }
  .pagination-btn { padding: 6px 10px; min-width: 36px; font-size: 0.85rem; }
  .search-results { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 16px; }
  .result-item-inner { padding: 12px; }
  .result-title { font-size: 0.9rem; height: 2.6em; margin-top:18px; }
  .result-system-icon { width: 22px; height: 22px; top: 6px; right: 6px; }
  .theme-toggle { margin-right: 0; width: 36px; height: 36px; font-size: 1rem; }
}
/* 响应式 手机 */
@media (max-width: 480px) {
  body { padding-top: 60px; }
  header { height: 60px; padding: 0 4%; }
  header .logo-img { height: 32px; max-width: 100px; }
  .search-container { width: 95%; margin-top: 10px; }
  .search-input { padding: 0 16px; font-size: 1rem; height:50px; }
  .search-btn { padding: 12px; }
  .section-title { font-size: 1.5rem; }
  .card-title { font-size: 1.2rem; }
  .action-btn { padding: 12px 24px; font-size: 1rem; }
  .pagination-container { gap: 4px; }
  .pagination-btn { padding: 5px 8px; min-width: 32px; font-size: 0.8rem; }
  .search-results { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 12px; }
  .result-item-inner { padding: 10px; }
  .result-title { font-size: 0.85rem; height: 2.4em; -webkit-line-clamp: 2; margin-top:16px; }
  .result-system-icon { width: 20px; height: 20px; top: 5px; right: 5px; }
}