:root {
  /* 霓虹主题色彩 */
  --neon-bg-dark: #0f0c29;
  --neon-bg-medium: #302b63;
  --neon-bg-light: #24243e;
  --neon-accent-1: #00c9ff;
  --neon-accent-2: #92fe9d;
  --neon-accent-3: #ff00cc;
  --neon-accent-4: #ff0000;
  --neon-text-light: #ffffff;
  --neon-text-medium: #e0e0e0;
  --neon-text-dark: #a0a0a0;
  --neon-glow-1: 0 0 10px #00c9ff, 0 0 20px #00c9ff, 0 0 30px #00c9ff;
  --neon-glow-2: 0 0 10px #92fe9d, 0 0 20px #92fe9d, 0 0 30px #92fe9d;
  --neon-glow-3: 0 0 10px #ff00cc, 0 0 20px #ff00cc, 0 0 30px #ff00cc;
  --neon-glow-4: 0 0 10px #ff0000, 0 0 20px #ff0000, 0 0 30px #ff0000;
  --neon-gradient-1: linear-gradient(45deg, #00c9ff, #92fe9d);
  --neon-gradient-2: linear-gradient(45deg, #ff00cc, #ff0000);
  --neon-gradient-3: linear-gradient(45deg, #00c9ff, #ff00cc);
  --neon-card-bg: rgba(36, 36, 62, 0.7);
  --neon-card-border: rgba(0, 201, 255, 0.3);
  --transition-fast: all 0.2s ease;
  --transition-medium: all 0.4s ease;
  --transition-slow: all 0.6s ease;
  --border-radius-small: 8px;
  --border-radius-medium: 16px;
  --border-radius-large: 24px;
}

/* 基础样式重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Orbitron', 'Poppins', sans-serif;
  background: linear-gradient(135deg, var(--neon-bg-dark), var(--neon-bg-medium), var(--neon-bg-dark));
  background-size: 400% 400%;
  color: var(--neon-text-light);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  animation: gradientBG 15s ease infinite;
}

@keyframes gradientBG {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

/* 霓虹效果基础类 */
.neon-glow-1 {
  text-shadow: var(--neon-glow-1);
  box-shadow: var(--neon-glow-1);
}

.neon-glow-2 {
  text-shadow: var(--neon-glow-2);
  box-shadow: var(--neon-glow-2);
}

.neon-glow-3 {
  text-shadow: var(--neon-glow-3);
  box-shadow: var(--neon-glow-3);
}

.neon-glow-4 {
  text-shadow: var(--neon-glow-4);
  box-shadow: var(--neon-glow-4);
}

/* 按钮样式 */
.neon-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  background: transparent;
  color: var(--neon-text-light);
  border: 2px solid var(--neon-accent-1);
  border-radius: var(--border-radius-small);
  font-family: 'Orbitron', sans-serif;
  font-weight: 600;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  cursor: pointer;
  overflow: hidden;
  transition: var(--transition-medium);
  z-index: 1;
}

.neon-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--neon-gradient-1);
  z-index: -1;
  opacity: 0;
  transition: var(--transition-medium);
}

.neon-button:hover {
  color: #000;
  transform: translateY(-3px);
  box-shadow: var(--neon-glow-1);
}

.neon-button:hover::before {
  opacity: 1;
}

.neon-button:active {
  transform: translateY(-1px);
}

.neon-button.secondary {
  border-color: var(--neon-accent-3);
}

.neon-button.secondary::before {
  background: var(--neon-gradient-2);
}

.neon-button.secondary:hover {
  box-shadow: var(--neon-glow-3);
}

/* 卡片样式 */
.neon-card {
  background: var(--neon-card-bg);
  border-radius: var(--border-radius-medium);
  border: 1px solid var(--neon-card-border);
  backdrop-filter: blur(10px);
  overflow: hidden;
  transition: var(--transition-medium);
  position: relative;
  z-index: 1;
}

.neon-card::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: var(--neon-gradient-3);
  border-radius: var(--border-radius-medium);
  z-index: -1;
  opacity: 0;
  transition: var(--transition-medium);
}

.neon-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--neon-glow-1);
}

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

/* 标题样式 */
.neon-title {
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  background: var(--neon-gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: var(--neon-glow-1);
  position: relative;
  display: inline-block;
}

.neon-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 50px;
  height: 3px;
  background: var(--neon-gradient-1);
  border-radius: 3px;
  box-shadow: var(--neon-glow-1);
}

/* 动画关键帧 */
@keyframes float {
  0% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-20px) rotate(10deg);
  }
  100% {
    transform: translateY(0) rotate(0deg);
  }
}

@keyframes pulse {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.05);
    opacity: 0.8;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes flicker {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* 悬浮动画类 */
.float-animation {
  animation: float 6s ease-in-out infinite;
}

.pulse-animation {
  animation: pulse 3s ease-in-out infinite;
}

.flicker-animation {
  animation: flicker 2s ease-in-out infinite;
}

/* 网格布局 */
.neon-grid {
  display: grid;
  gap: 25px;
}

/* 加载动画 */
.neon-loader {
  width: 48px;
  height: 48px;
  border: 5px solid rgba(0, 201, 255, 0.3);
  border-radius: 50%;
  display: inline-block;
  position: relative;
  box-sizing: border-box;
  animation: rotation 1s linear infinite;
}

.neon-loader::after {
  content: '';
  box-sizing: border-box;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 5px solid transparent;
  border-bottom-color: #00c9ff;
  animation: rotation 0.5s linear infinite reverse;
}

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