:root {
  --primary-color: #00d4ff;
  --bg-dark: #0a0a0a;
  --bg-darker: #050505;
  --bg-card: #151515;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --border-color: #2a2a2a;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-primary);
}

.admin-container { display: flex; min-height: 100vh; }

aside.sidebar, .sidebar {
  width: 250px;
  background: var(--bg-darker);
  border-right: 1px solid var(--border-color);
  position: fixed;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-header { padding: 20px; border-bottom: 1px solid var(--border-color); }
.sidebar-header h2, .sidebar h2 {
  font-size: 18px;
  background: linear-gradient(135deg, #00d4ff 0%, #7b2cbf 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sidebar-nav { padding: 0; }
.sidebar-nav a, .sidebar a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.3s;
}
.sidebar-nav a:hover, .sidebar a:hover,
.sidebar-nav a.active, .sidebar a.active {
  background: rgba(0, 212, 255, 0.1);
  color: var(--primary-color);
  border-left: 3px solid var(--primary-color);
}

main.main-content, .main-content, .content {
  flex: 1;
  margin-left: 250px;
  padding: 20px;
  min-height: 100vh;
}

.content-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}
.content-header h1 { font-size: 24px; }

.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 8px; font-weight: 500; }
.form-group input, .form-group textarea, .form-group select {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 14px;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none;
  border-color: var(--primary-color);
}
.form-group textarea { min-height: 120px; resize: vertical; }

.btn-primary {
  background: linear-gradient(135deg, #00d4ff 0%, #7b2cbf 100%);
  color: white;
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.3s;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(0, 212, 255, 0.3);
}

.btn-edit {
  background: rgba(0, 212, 255, 0.2);
  color: var(--primary-color);
  padding: 6px 12px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  margin-right: 5px;
}

.btn-delete {
  background: rgba(255, 71, 87, 0.2);
  color: #ff4757;
  padding: 6px 12px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
}

/* Modal样式 */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,0.8);
}

.modal-content {
  background-color: var(--bg-card);
  margin: 5% auto;
  padding: 20px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  width: 90%;
  max-width: 600px;
  max-height: 80vh;
  overflow-y: auto;
}

.close {
  color: var(--text-secondary);
  float: right;
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
}

.close:hover {
  color: var(--text-primary);
}

.admin-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.admin-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
}

.admin-item h3 {
  margin: 10px 0;
}

.admin-item p {
  color: var(--text-secondary);
  margin: 5px 0;
}

.admin-item img {
  width: 100%;
  border-radius: 8px;
  margin-bottom: 15px;
}

.user-info {
  color: var(--text-secondary);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.stat-card i {
  font-size: 32px;
  color: var(--primary-color);
}

.stat-card h3 {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 5px;
}

.stat-card p {
  font-size: 28px;
  font-weight: bold;
}