:root {
  /* 深色主题色彩体系 */
  --bg-primary: #0a0e1a;
  --bg-secondary: #0f1629;
  --bg-tertiary: #141b33;
  --bg-card: rgba(15, 22, 41, 0.7);
  --bg-glass: rgba(15, 22, 41, 0.45);

  /* 霓虹点缀色 */
  --neon-cyan: #00f0ff;
  --neon-cyan-dim: rgba(0, 240, 255, 0.15);
  --neon-blue: #4d7cff;
  --neon-purple: #a855f7;
  --neon-green: #00ff88;

  /* 文字色彩 */
  --text-primary: #e8eaf6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;

  /* 边框与装饰 */
  --border-glow: rgba(0, 240, 255, 0.2);
  --border-subtle: rgba(255, 255, 255, 0.06);

  /* 渐变 */
  --gradient-hero: linear-gradient(135deg, #0a0e1a 0%, #0f1629 50%, #0d1a2d 100%);
  --gradient-card: linear-gradient(135deg, rgba(0, 240, 255, 0.05) 0%, rgba(77, 124, 255, 0.05) 100%);
  --gradient-neon: linear-gradient(90deg, var(--neon-cyan), var(--neon-blue), var(--neon-purple));
  --gradient-text: linear-gradient(90deg, #00f0ff, #4d7cff, #a855f7);

  /* 间距 */
  --section-padding: 100px 0;
  --container-width: 1280px;

  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;

  /* 毛玻璃 */
  --glass-blur: blur(20px);
  --glass-border: 1px solid rgba(0, 240, 255, 0.12);

  /* 动画 */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.6s ease;
}

/* 全局重置 */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--neon-cyan);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: #fff;
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* 通用标题样式 */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--neon-cyan);
  margin-bottom: 16px;
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 2px;
  background: var(--gradient-neon);
  border-radius: 1px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.section-title .gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 680px;
  line-height: 1.8;
}

/* 毛玻璃卡片 */
.glass-card {
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}

.glass-card:hover {
  border-color: rgba(0, 240, 255, 0.3);
  box-shadow: 0 0 30px rgba(0, 240, 255, 0.08), inset 0 0 30px rgba(0, 240, 255, 0.02);
  transform: translateY(-4px);
}

/* 霓虹按钮 */
.btn-neon {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.15), rgba(77, 124, 255, 0.15));
  border: 1px solid rgba(0, 240, 255, 0.4);
  border-radius: var(--radius-sm);
  color: var(--neon-cyan);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.btn-neon::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.1), transparent);
  transition: left 0.5s ease;
}

.btn-neon:hover::before {
  left: 100%;
}

.btn-neon:hover {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.25), rgba(77, 124, 255, 0.25));
  border-color: var(--neon-cyan);
  box-shadow: 0 0 25px rgba(0, 240, 255, 0.2);
  color: #fff;
  transform: translateY(-2px);
}

.btn-neon-solid {
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
  border: none;
  color: #0a0e1a;
  font-weight: 700;
}

.btn-neon-solid:hover {
  box-shadow: 0 0 35px rgba(0, 240, 255, 0.35);
  color: #0a0e1a;
}

/* 滚动显示动画 */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }

/* 分隔线 */
.section-divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-glow), transparent);
  margin: 0;
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: rgba(0, 240, 255, 0.2);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 240, 255, 0.4);
}