/*
 * Theme: Cyber Dark
 * 赛博霓虹深色 — 深蓝黑底，蓝紫光弧渐变，未来科技感
 * 适合：AI/SaaS 产品发布、技术演讲、黑客松展示、极客风格
 */
:root {
  /* --- 配色 --- */
  --color-primary: #f0f4ff;
  --color-secondary: #8b95ad;
  --color-accent: #818cf8;
  --color-bg: #0b0f19;
  --color-bg-alt: #141928;
  --color-surface: #1a2035;
  --color-text: #f0f4ff;
  --color-text-secondary: #8b95ad;
  --color-text-on-primary: #0b0f19;
  --color-border: #2a3150;

  /* --- 字体 --- */
  --font-heading: 'Inter', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --font-size-title: 3.94rem;
  --font-size-heading: 2.81rem;
  --font-size-subheading: 1.69rem;
  --font-size-body: 1.24rem;
  --font-size-small: 0.98rem;

  /* --- 间距和尺寸 --- */
  --slide-padding: 5.06rem;
  --spacing-xs: 0.56rem;
  --spacing-sm: 1.12rem;
  --spacing-md: 1.97rem;
  --spacing-lg: 3.09rem;
  --spacing-xl: 4.5rem;

  /* --- 效果 --- */
  --border-radius: 10px;
  --shadow-sm: 0 1px 4px rgba(129,140,248,0.08);
  --shadow-md: 0 4px 16px rgba(129,140,248,0.12);
  --shadow-lg: 0 8px 32px rgba(129,140,248,0.18);
  --transition-speed: 0.3s;
  --transition-easing: cubic-bezier(0.4, 0, 0.2, 1);

  /* --- 玻璃/渐变扩展（非玻璃主题保持默认值，零渲染开销） --- */
  --surface-blur: 0px;
  --surface-saturate: 100%;
  --bg-pattern: none;
}