:root {
  --paper: #f4f2eb;
  --paper-soft: #fbfaf6;
  --paper-deep: #e7e2d8;
  --ink: #14201b;
  --muted: #66716b;
  --green: #527563;
  --blue: #4d70c8;
  --orange: #df8961;
  --line: rgba(20, 32, 27, .14);
  --line-strong: rgba(20, 32, 27, .28);
  --shadow: 0 30px 90px rgba(28, 36, 32, .22);
  --serif: "Songti SC", "STSong", "SimSun", serif;
  --sans: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif;
}