:root{
  /* 尺寸与交互 */
  --menu-scale: 0.61;
  --menu-featured-scale: 1.30;
  --hover-scale: 1.03;

  /* 阴影 */
  --shadow: 0 18px 40px rgba(0,0,0,.35);
  --shadow-hover: 0 26px 60px rgba(0,0,0,.45);

  /* 文本与 UI */
  --text: #ffffff;
  --ribbon-bg: rgba(255,255,255,.78);
  --ribbon-text: #3a2a2a;
  --ribbon-border: rgba(255,255,255,.55);
  --focus: 0 0 0 3px rgba(255, 180, 220, .55);
}


/* 让 height:100% 更稳定（对 .scene 有帮助） */
html, body{
  height: 100%;
}

/* 页面基础 */
body{
  font-family: ui-sans-serif, system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", Arial;
  background: #000;
  overflow: hidden;
}