:root {
  /* --- 核心基调 (Tech Luxury) --- */
  --bg-deep: #050508;
  --bg-surface: rgba(20, 20, 25, 0.7);
  
  /* --- 文字系统 --- */
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.75);
  --text-tertiary: rgba(255, 255, 255, 0.45);

  /* --- 玻璃拟态 (Glassmorphism) --- */
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-highlight: rgba(255, 255, 255, 0.12);
  --glass-blur: 24px;
  --glass-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);

  /* --- 盲盒分级配色 (Liquid Gradients) --- */
  
  /* Level 1: Starter (¥5) - 青/绿 - 入门科技感 */
  --color-starter-main: #00f2ea;
  --grad-starter: linear-gradient(135deg, #00f2ea 0%, #00d26a 100%);
  --glow-starter: rgba(0, 242, 234, 0.25);
  
  /* Level 2: Premium (¥10) - 紫/粉 - 赛博霓虹 */
  --color-premium-main: #b042ff;
  --grad-premium: linear-gradient(135deg, #b042ff 0%, #ff2970 100%);
  --glow-premium: rgba(176, 66, 255, 0.3);
  
  /* Level 3: Luxury (¥30) - 黑金/橙 - 极致奢华 */
  --color-luxury-main: #ffd700;
  --grad-luxury: linear-gradient(135deg, #ffd700 10%, #ff8c00 100%);
  --grad-luxury-text: linear-gradient(180deg, #fff 0%, #ffd700 100%);
  --glow-luxury: rgba(255, 215, 0, 0.4);

  /* --- 奖品卡片背景 --- */
  --card-vip-bg: linear-gradient(145deg, #1a1a1f 0%, #2a2a35 100%);
  
  /* --- 纹理素材 (Transparent Textures) --- */
  /* 使用菱形纹理作为通用底纹 */
  --texture-pattern: url("https://www.transparenttextures.com/patterns/diamond-upholstery.png");
}