/* STTTE design tokens — "Iceland" cold reading surface (2026-07 全站冷调重设计).
   北极荒原孤独感：雾白冷底 + 玄武岩近黑墨 + 克制的冰川钢蓝 accent。
   Shared by all surfaces (home / kb / product / post) for one consistent system.
   注：首页 home.css 另有一份 :root 覆盖同名色变量（与此处一致），字体变量始终取此处。 */
:root{
  /* cold reading surface — fog whites */
  --paper:      #e8ebec;   /* fog-white base */
  --paper-2:    #dfe4e6;   /* slightly deeper mist */
  --card:       #eef1f2;   /* raised card / reading column */
  --line:       #d0d7da;   /* hairline border */
  --line-soft:  #dbe1e3;
  --ink:        #14181b;   /* basalt near-black body text */
  --ink-2:      #4b555b;   /* secondary text — wet stone */
  --ink-3:      #8a949a;   /* muted / meta — ash */
  /* accent — glacial steel (was warm teal) */
  --teal:       #4e6b76;   /* glacial steel */
  --teal-deep:  #37535c;   /* deep fjord */
  --teal-wash:  #dde7ea;   /* faint cold fill */
  --amber:      #8a7250;   /* muted bronze — the one restrained warm accent (note callouts) */
  /* dark hero / footer stack — basalt */
  --night:      #0b0e10;
  --night-2:    #14181d;
  --frost:      #c3ced3;
  /* type — latin self-hosted; CJK uses system serif (no multi-MB download) */
  --serif:    "Cormorant Garamond", "Songti SC", Georgia, serif;
  --fraunces: "Fraunces", "Songti SC", Georgia, serif;
  --sans:     "Inter", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono:     "Space Grotesk", "Inter", ui-monospace, monospace;
  --cn:       "Songti SC", "Source Han Serif SC", "Noto Serif SC", "STSong", serif;
  --maxw: 1180px;
}