/* 全局样式 - 商务科技风格 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* 主题色 */
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --primary-color: #667eea;
  --secondary-color: #764ba2;
  --accent-color: #00d4ff;
  
  /* 优化后的配色 - 更亮更清晰 */
  --bg-dark: #1a1f3a;
  --bg-darker: #141829;
  --bg-card: rgba(255, 255, 255, 0.08);
  --bg-card-hover: rgba(255, 255, 255, 0.12);
  
  /* 文字颜色 */
  --text-primary: #ffffff;
  --text-secondary: #cbd5e0;
  --text-muted: #94a3b8;
  
  /* 边框 */
  --border-color: rgba(255, 255, 255, 0.15);
  --border-glow: rgba(102, 126, 234, 0.4);
  
  /* 阴影 */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.5);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(118, 75, 162, 0.15) 0%, transparent 50%);
}

/* 容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 导航栏 */
.navbar {
  background: rgba(26, 31, 58, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-md);
}

.navbar-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.navbar-logo {
  font-size: 24px;
  font-weight: bold;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.navbar-logo::before {
  content: '◆';
  -webkit-text-fill-color: var(--accent-color);
  font-size: 20px;
}

.navbar-menu {
  display: flex;
  list-style: none;
  gap: 30px;
  align-items: center;
}

.navbar-menu a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 16px;
  transition: all 0.3s ease;
  position: relative;
  padding: 5px 0;
}

.navbar-menu a:hover {
  color: var(--text-primary);
}

.navbar-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-gradient);
  transition: width 0.3s ease;
}

.navbar-menu a:hover::after,
.navbar-menu a.active::after {
  width: 100%;
}

.navbar-actions {
  display: flex;
  gap: 15px;
}

/* 按钮样式 */
.btn {
  padding: 10px 24px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary-gradient);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.btn-outline:hover {
  border-color: var(--primary-color);
  background: rgba(102, 126, 234, 0.1);
}

.btn-large {
  padding: 14px 32px;
  font-size: 16px;
}

.btn-icon {
  padding: 10px 16px;
}

/* 卡片 */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  box-shadow: 0 4px 16px rgba(102, 126, 234, 0.2);
  transform: translateY(-2px);
}

.card-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.card-content {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 表单 */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 14px;
  transition: all 0.3s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  background: rgba(255, 255, 255, 0.15);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

/* 优化select下拉选项的可见性 */
.form-select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23ffffff' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 12px;
  padding-right: 40px;
}

.form-select option {
  background: #2d3748;
  color: #ffffff;
  padding: 10px;
  font-size: 14px;
}

.form-select optgroup {
  background: #1a202c;
  color: #a0aec0;
  font-weight: 600;
  font-style: normal;
  padding: 8px 0;
}

.form-select option:hover,
.form-select option:focus,
.form-select option:checked {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #ffffff;
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* 徽章 */
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}

.badge-success {
  background: rgba(72, 187, 120, 0.2);
  color: #68d391;
  border: 1px solid rgba(72, 187, 120, 0.3);
}

.badge-warning {
  background: rgba(237, 137, 54, 0.2);
  color: #f6ad55;
  border: 1px solid rgba(237, 137, 54, 0.3);
}

.badge-danger {
  background: rgba(245, 101, 101, 0.2);
  color: #fc8181;
  border: 1px solid rgba(245, 101, 101, 0.3);
}

.badge-info {
  background: rgba(0, 212, 255, 0.2);
  color: var(--accent-color);
  border: 1px solid rgba(0, 212, 255, 0.3);
}

/* 加载动画 */
.loader {
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-top: 3px solid var(--primary-color);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
  margin: 20px auto;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* 通知提示 */
.toast {
  position: fixed;
  top: 90px;
  right: 20px;
  padding: 16px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  z-index: 9999;
  animation: slideIn 0.3s ease;
  max-width: 350px;
  backdrop-filter: blur(10px);
}

.toast-success {
  border-left: 4px solid #68d391;
}

.toast-error {
  border-left: 4px solid #fc8181;
}

.toast-info {
  border-left: 4px solid var(--accent-color);
}

@keyframes slideIn {
  from {
    transform: translateX(400px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* 页脚 */
.footer {
  background: rgba(20, 24, 41, 0.95);
  border-top: 1px solid var(--border-color);
  padding: 40px 0 20px;
  margin-top: 80px;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  text-align: center;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-bottom: 20px;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: var(--primary-color);
}

/* 响应式 */
@media (max-width: 768px) {
  .navbar-menu {
    display: none;
  }
  
  .navbar-actions {
    flex: 1;
    justify-content: flex-end;
  }
  
  .container {
    padding: 0 15px;
  }
  
  .btn {
    padding: 8px 16px;
    font-size: 13px;
  }
}

/* 渐变背景动画 */
@keyframes gradient-shift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

/* 发光效果 */
.glow-text {
  text-shadow: 0 0 10px rgba(102, 126, 234, 0.5),
               0 0 20px rgba(102, 126, 234, 0.3),
               0 0 30px rgba(102, 126, 234, 0.2);
}

/* 科技感边框 */
.tech-border {
  position: relative;
  border: 1px solid var(--border-color);
}

.tech-border::before {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  bottom: -1px;
  background: var(--primary-gradient);
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: -1;
}

.tech-border:hover::before {
  opacity: 0.2;
}

/* 隐藏滚动条但保持功能 */
.custom-scrollbar::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

.custom-scrollbar::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 3px;
}

.custom-scrollbar::-webkit-scrollbar-thumb {
  background: rgba(102, 126, 234, 0.5);
  border-radius: 3px;
}

.custom-scrollbar::-webkit-scrollbar-thumb:hover {
  background: rgba(102, 126, 234, 0.7);
}