:root {
  /* 基础轻盈晨光调色盘 */
  --bg-sand: #fbf9f5;
  --bg-sand-warm: #f4eee3;
  
  /* 90% 透光冰川白磨砂质感 */
  --glass-bg: rgba(255, 255, 255, 0.52);
  --glass-bg-light: rgba(255, 255, 255, 0.72);
  --glass-bg-subtle: rgba(255, 255, 255, 0.35);
  --glass-bg-user: rgba(248, 243, 233, 0.65);
  
  /* 1px 珍珠柔金微光勾边 */
  --glass-border: rgba(255, 255, 255, 0.85);
  --glass-border-subtle: rgba(255, 255, 255, 0.45);
  --rim-pearl: rgba(255, 255, 255, 0.95);
  --rim-gold: rgba(212, 175, 55, 0.35);
  --gold-accent: #bfa068;
  --gold-soft: #dfcaa7;
  
  /* 文字与层级 */
  --text-primary: #1c222b;
  --text-secondary: #586170;
  --text-whisper: #8e98a8;
  --text-white: #ffffff;
  
  /* 阴影与微光 */
  --shadow-airy: 0 10px 30px -4px rgba(180, 165, 145, 0.12), 0 2px 6px rgba(0, 0, 0, 0.02);
  --shadow-floating: 0 14px 40px -6px rgba(180, 165, 145, 0.18), 0 0 15px rgba(223, 202, 167, 0.2);
  
  /* 字体系统 */
  --font-serif: "Cormorant Garamond", "Noto Serif SC", "Zhuque Fangsong", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "PingFang SC", "Segoe UI", Roboto, sans-serif;
  
  /* iOS 视口安全区基线 */
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}