/* 科技感主题 */
:root{
  --primary-bg: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
  --panel-bg: rgba(25, 25, 35, 0.85);
  --glass-bg: rgba(30, 30, 40, 0.8);
  --text: #e0e0e0;
  --muted: #bdc3c7;
  --accent: #00ffff;
  --accent-secondary: #4a4a8a;
  --brand: #22c55e;
  --warning: #ff6b6b;
  --border: rgba(0, 255, 255, 0.2);
  --glow-shadow: 0 0 20px rgba(0, 255, 255, 0.3);
  --deep-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background: var(--primary-bg);
  position: relative;
  overflow-x: hidden;
  overflow-y: auto;
}

/* 科技感背景粒子效果 */
body::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 10% 20%, rgba(0, 255, 255, 0.1) 0%, transparent 20%),
    radial-gradient(circle at 90% 80%, rgba(255, 0, 255, 0.1) 0%, transparent 20%),
    radial-gradient(circle at 50% 50%, rgba(0, 255, 0, 0.05) 0%, transparent 30%);
  z-index: -1;
}

.particle {
  position: absolute;
  background: rgba(0, 255, 255, 0.6);
  border-radius: 50%;
  pointer-events: none;
  z-index: -1;
}

/* 科技感顶部 */
.site-header{
  position: sticky;
  top: 0;
  background: var(--panel-bg);
  border-bottom: 1px solid var(--border);
  z-index: 50;
  backdrop-filter: blur(4px);
  box-shadow: var(--deep-shadow);
}

.topbar{
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.logo{
  font-weight: 900;
  letter-spacing: .5px;
  color: var(--text);
  background: var(--panel-bg);
  padding: 8px 12px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.3s ease;
  cursor: pointer;
  border: 1px solid var(--border);
  box-shadow: var(--glow-shadow), inset 0 0 10px rgba(0, 255, 255, 0.1);
  text-shadow: 0 0 5px rgba(0, 255, 255, 0.3);
}

.logo:hover{
  background: rgba(40, 40, 55, 0.9);
  transform: translateY(-2px);
  box-shadow: var(--glow-shadow), 0 6px 16px rgba(0, 255, 255, 0.4);
  border-color: var(--accent);
}

.logo-icon{
  font-size: 18px;
  animation: bounce 2s infinite;
}

.logo-text{font-size: 15px; font-weight: 700}

@keyframes bounce{
  0%,20%,50%,80%,100%{transform: translateY(0)}
  40%{transform: translateY(-3px)}
  60%{transform: translateY(-2px)}
}
.status-info{
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: 8px;
}

.stat-item{
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  background: linear-gradient(135deg, rgba(40, 40, 55, 0.8), rgba(30, 30, 40, 0.7));
  border-radius: 12px;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
  cursor: default;
  backdrop-filter: blur(4px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2), inset 0 0 5px rgba(0, 255, 255, 0.1);
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.stat-item:hover{
  background: linear-gradient(135deg, rgba(52, 152, 219, 0.2), rgba(52, 152, 219, 0.1));
  transform: translateY(-2px);
  box-shadow: var(--glow-shadow), 0 6px 16px rgba(0, 255, 255, 0.3);
  border-color: var(--accent);
}

.stat-item:hover::before {
  left: 100%;
}

.stat-icon{
  font-size: 16px;
  text-shadow: 0 0 3px rgba(0, 255, 255, 0.5);
}

.stat-text{
  font-size: 14px;
  color: var(--text);
  font-weight: 500;
  text-shadow: 0 0 2px rgba(0, 0, 0, 0.5);
}

.stat-divider{
  color: var(--accent);
  font-weight: bold;
  animation: pulse 2s infinite;
  text-shadow: 0 0 5px rgba(0, 255, 255, 0.7);
}

@keyframes pulse{
  0%,100%{opacity: 1; transform: scale(1)}
  50%{opacity: 0.6; transform: scale(1.1)}
}
.actions{margin-left:auto;display:flex;gap:8px}
.icon-btn{border:1px solid var(--border);background:#fff;border-radius:8px;padding:6px 8px;cursor:pointer}

/* 科技感布局 */
.container{
  max-width: 1200px;
  margin: 30px auto; /* 增加上下边距 */
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  padding: 0 16px;
  height: calc(100vh - 140px); /* 调整高度计算以适应更大的边距 */
  min-height: 0; /* 允许内容收缩 */
}

/* 科技感筛选面板 */
.filters{
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 15px; /* 减少内边距 */
  backdrop-filter: blur(8px);
  box-shadow: var(--deep-shadow), var(--glow-shadow);
  transition: all 0.3s ease;
}

.filters:hover {
  border-color: var(--accent);
  box-shadow: var(--deep-shadow), 0 0 30px rgba(0, 255, 255, 0.4);
}

.filters h3{
  margin: 0 0 16px 0;
  color: var(--accent);
  font-size: 18px;
  font-weight: 700;
  text-shadow: 0 0 5px rgba(0, 255, 255, 0.5);
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}

.filter-group{
  margin-bottom: 12px; /* 减少底部边距 */
  background: rgba(40, 40, 55, 0.5);
  border-radius: 12px;
  padding: 10px; /* 减少内边距 */
  border: 1px solid rgba(0, 255, 255, 0.1);
}

.filter-group summary{
  cursor: pointer;
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--text);
  font-weight: 600;
  transition: all 0.3s ease;
}

.filter-group[open] summary{
  background: rgba(52, 152, 219, 0.2);
  color: var(--accent);
  text-shadow: 0 0 3px rgba(0, 255, 255, 0.5);
}

.filter-group label{
  display: block;
  padding: 8px 4px;
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.3s ease;
  border-radius: 6px;
  margin: 2px 0;
}

.filter-group label:hover {
  background: rgba(0, 255, 255, 0.1);
  color: var(--accent);
  text-shadow: 0 0 2px rgba(0, 255, 255, 0.3);
  transform: translateX(4px);
}

.filter-group input{
  accent-color: var(--accent);
  margin-right: 8px;
  transform: scale(1.1);
}

/* 科技感科目分组样式 */
.subject-group-header {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
}

.subject-group {
  display: flex;
  align-items: center;
  font-weight: bold;
  transform: scale(1.1);
  margin-right: 8px;
  color: var(--accent);
  text-shadow: 0 0 3px rgba(0, 255, 255, 0.5);
}

.subject-group input[type="checkbox"] {
  transform: scale(1.1);
  margin-right: 8px;
  accent-color: var(--accent);
}

/* 科技感结果区 */
.results-bar{
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 12px 16px; /* 减少内边距 */
  margin-bottom: 15px; /* 减少底部边距 */
  backdrop-filter: blur(8px);
  box-shadow: var(--deep-shadow), inset 0 0 10px rgba(0, 255, 255, 0.1);
}

.results-bar h2{
  margin: 0;
  font-size: 20px;
  color: var(--accent);
  font-weight: 700;
  text-shadow: 0 0 5px rgba(0, 255, 255, 0.5);
}

.controls{
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.sort select{
  border: 1px solid var(--border);
  padding: 8px 12px;
  border-radius: 10px;
  background: rgba(40, 40, 55, 0.8);
  color: var(--text);
  font-size: 14px;
  backdrop-filter: blur(4px);
  transition: all 0.3s ease;
}

.sort select:hover {
  border-color: var(--accent);
  box-shadow: var(--glow-shadow);
}

.sort select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: var(--glow-shadow);
}

.view-btn{
  border: 1px solid var(--border);
  background: rgba(40, 40, 55, 0.8);
  border-radius: 10px;
  padding: 8px 12px;
  cursor: pointer;
  color: var(--text);
  font-size: 14px;
  transition: all 0.3s ease;
  backdrop-filter: blur(4px);
}

.view-btn:hover {
  background: rgba(52, 152, 219, 0.2);
  border-color: var(--accent);
  color: var(--accent);
  text-shadow: 0 0 3px rgba(0, 255, 255, 0.5);
  transform: translateY(-2px);
  box-shadow: var(--glow-shadow);
}

.view-btn.active{
  background: var(--accent);
  color: var(--primary-bg);
  border-color: var(--accent);
  box-shadow: var(--glow-shadow);
}

/* 科技感年级筛选控件样式 */
.grade-filters {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
  padding: 12px;
  background: rgba(40, 40, 55, 0.5);
  border-radius: 12px;
  border: 1px solid rgba(0, 255, 255, 0.1);
}

.grade-select, .semester-select {
  border: 1px solid var(--border);
  padding: 8px 12px;
  border-radius: 10px;
  background: rgba(40, 40, 55, 0.8);
  color: var(--text);
  font-size: 14px;
  backdrop-filter: blur(4px);
  transition: all 0.3s ease;
}

.grade-select:hover, .semester-select:hover {
  border-color: var(--accent);
  box-shadow: var(--glow-shadow);
}

.apply-btn {
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--primary-bg);
  border-radius: 10px;
  padding: 8px 16px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.3s ease;
  text-shadow: 0 0 2px rgba(0, 0, 0, 0.5);
  box-shadow: 0 4px 8px rgba(0, 255, 255, 0.3);
}

.apply-btn:hover {
  background: rgba(0, 255, 255, 0.8);
  transform: translateY(-2px);
  box-shadow: var(--glow-shadow), 0 6px 12px rgba(0, 255, 255, 0.4);
}

/* 科技感卡片 */
.results{
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0; /* 关键：确保 flex 子项可以收缩 */
  padding: 10px 0; /* 增加上下内边距 */
  overflow: hidden; /* 防止结果区域溢出 */
}

.cards{
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  overflow-y: auto;
  overflow-x: hidden; /* 防止水平滚动 */
  padding-right: 4px; /* 为滚动条预留空间 */
  flex: 1; /* 允许卡片容器填充可用空间 */
  min-height: 0; /* 允许收缩 */
  align-content: flex-start; /* 确保内容对齐到顶部 */
}

.sim-card{
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.3s ease;
  position: relative;
  backdrop-filter: blur(8px);
  box-shadow: var(--deep-shadow), inset 0 0 10px rgba(0, 255, 255, 0.05);
  height: 250px; /* 固定卡片高度 */
  display: flex;
  flex-direction: column;
}

.sim-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.sim-card:hover{
  box-shadow: var(--glow-shadow), var(--deep-shadow), 0 0 30px rgba(0, 255, 255, 0.3);
  transform: translateY(-4px) scale(1.02);
  border-color: var(--accent);
}

.sim-card:hover::before {
  opacity: 1;
}

.sim-card.hidden{
  display: none;
}

.thumb{
  height: 140px; /* 固定缩略图高度 */
  background: linear-gradient(135deg, rgba(52, 152, 219, 0.2), rgba(52, 152, 219, 0.1));
  border-bottom: 1px solid var(--border);
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  position: relative;
  overflow: hidden;
  flex-shrink: 0; /* 防止缩略图被压缩 */
}

.thumb::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 255, 255, 0.2), transparent);
  transition: left 0.6s ease;
}

.thumb:hover::before {
  left: 100%;
}

.meta{
  padding: 12px; /* 减少内边距以节省空间 */
  flex: 1; /* 占据剩余空间 */
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.meta h3{
  margin: 0 0 12px 0;
  font-size: 16px;
  color: var(--accent);
  font-weight: 700;
  text-shadow: 0 0 3px rgba(0, 255, 255, 0.5);
}

.badges{
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.badges span{
  display: inline-block;
  font-size: 13px;
  line-height: 1;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  color: var(--text);
  background: rgba(40, 40, 55, 0.7);
  transition: all 0.3s ease;
  backdrop-filter: blur(4px);
}

.badges span:hover {
  background: rgba(0, 255, 255, 0.2);
  border-color: var(--accent);
  color: var(--accent);
  text-shadow: 0 0 2px rgba(0, 255, 255, 0.5);
}

/* 科技感列表视图 */
.cards.list{
  grid-template-columns: 1fr;
  gap: 16px;
}

.cards.list .sim-card{
  display: flex;
  align-items: center;
  padding: 12px;
  gap: 16px;
}

.cards.list .thumb{
  width: 240px;
  height: 120px;
  min-height: 120px;
  border-right: 1px solid var(--border);
  border-bottom: none;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  border-radius: 8px;
}

.cards.list .meta{
  flex: 1;
  padding: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* 科技感响应式设计 */
@media (max-width: 1024px){
  .container{
    grid-template-columns: 240px 1fr;
    gap: 20px;
  }
  
  .cards{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  
  .filters {
    padding: 16px;
  }
  
  .results-bar {
    padding: 12px 16px;
  }
  
  .sim-card {
    height: 230px; /* 在中等屏幕上调整卡片高度 */
  }
}

@media (max-width: 720px){
  body {
    padding: 8px;
  }
  
  .container{
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .filters{
    order: 2;
    padding: 16px;
  }
  
  .results{
    order: 1;
  }
  
  .cards{
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .results-bar {
    flex-direction: column;
    gap: 12px;
    align-items: stretch;
    padding: 12px 16px;
  }
  
  .controls {
    justify-content: space-between;
  }
  
  .logo {
    padding: 6px 10px;
  }
  
  .status-info {
    gap: 8px;
  }
  
  .stat-item {
    padding: 6px 8px;
  }
  
  .stat-text {
    font-size: 12px;
  }
  
  .sim-card {
    height: 220px; /* 在小屏幕上调整卡片高度 */
  }
}

/* 科技感动画增强 */
.sim-card {
  animation: fadeInScale 0.6s ease-out;
}

@keyframes fadeInScale {
  0% {
    opacity: 0;
    transform: scale(0.9);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(40, 40, 55, 0.5);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 4px;
  box-shadow: 0 0 3px rgba(0, 255, 255, 0.5);
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 255, 255, 0.8);
}

/* 加载动画效果 */
.loading {
  position: relative;
  overflow: hidden;
}

.loading::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 255, 255, 0.3), transparent);
  animation: loading-shimmer 1.5s infinite;
}

@keyframes loading-shimmer {
  0% { left: -100%; }
  100% { left: 100%; }
}