/**
 * [INPUT]: 无。
 * [OUTPUT]: 全站宣纸墨色皮肤。
 * [POS]: 唯一样式表。首页两扇门与两套盘面共用。
 * [PROTOCOL]: 变更时更新此头部，然后检查 CLAUDE.md
 */
:root {
  --bg: #ebe1cf;
  --panel: #f6edd8;
  --ink: #2b2116;
  --muted: #6d5c45;
  --line: #c9b48a;
  --seal: #9c2b24;
  --gold: #8a5a1c;
  --shadow: 0 12px 28px rgba(80, 50, 16, 0.12);
  --serif: "Iowan Old Style", "Palatino Linotype", "Songti SC", "Noto Serif SC", serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  color: var(--ink);
  font: 16px/1.6 var(--sans);
  background:
    radial-gradient(circle at 12% 8%, rgba(156, 43, 36, 0.08), transparent 28%),
    radial-gradient(circle at 90% 0%, rgba(138, 90, 28, 0.1), transparent 32%),
    var(--bg);
}
.page { max-width: 820px; margin: 0 auto; padding: 36px 20px 80px; }
.eyebrow { letter-spacing: 0.22em; text-transform: uppercase; font-size: 11px; color: var(--seal); margin: 0 0 8px; }
h1 { font: 42px/1.15 var(--serif); margin: 0 0 12px; }
.lead, .muted, .note { color: var(--muted); }
.doors { display: grid; gap: 14px; margin-top: 28px; }
@media (min-width: 720px) { .doors { grid-template-columns: 1fr 1fr; } }
.door, .card, .btn, .back {
  border: 1px solid var(--line);
  background: var(--panel);
  color: inherit;
}
.door {
  text-align: left;
  padding: 22px 20px;
  border-radius: 4px 18px 4px 18px;
  box-shadow: var(--shadow);
  cursor: pointer;
}
.door span { display: block; font: 26px var(--serif); color: var(--gold); }
.door small { display: block; margin-top: 8px; color: var(--muted); }
.door:hover { border-color: var(--seal); }
.card { padding: 18px; border-radius: 10px; margin: 18px 0; box-shadow: var(--shadow); }
.back { padding: 6px 12px; border-radius: 999px; cursor: pointer; margin-bottom: 18px; }
label, legend { display: block; font-size: 13px; color: var(--muted); margin: 10px 0 6px; }
input, textarea, select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fffaf0;
  color: var(--ink);
  font: inherit;
}
.row { display: grid; gap: 10px; }
@media (min-width: 560px) { .row { grid-template-columns: 1fr 1fr; } }
.inline { display: inline-flex; align-items: center; gap: 6px; margin-right: 16px; }
.inline input { width: auto; }
fieldset { border: 0; padding: 0; margin: 12px 0; }
.btn {
  width: 100%;
  margin-top: 14px;
  padding: 12px;
  border-radius: 8px;
  background: var(--seal);
  color: #f6edd8;
  cursor: pointer;
  font: 16px var(--serif);
}
.btn:disabled { opacity: 0.55; cursor: wait; }
.yao-picks { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; }
.result-head h2 { font: 30px var(--serif); margin: 6px 0; color: var(--gold); }
.chart { overflow-x: auto; }
.facts { width: 100%; border-collapse: collapse; margin: 16px 0; }
.facts th, .facts td { border-top: 1px solid var(--line); padding: 8px 6px; vertical-align: top; }
.facts th { width: 7em; color: var(--gold); text-align: left; font-weight: 600; }
.ww-board { display: grid; gap: 6px; margin: 16px 0; }
.ww-row {
  display: grid;
  grid-template-columns: 84px 70px repeat(5, minmax(0, 1fr));
  gap: 6px;
  align-items: center;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 13px;
}
.ww-row.moving { border-color: var(--gold); background: rgba(138, 90, 28, 0.06); }
.yao { position: relative; display: flex; align-items: center; justify-content: center; gap: 10px; height: 18px; }
.yao i { display: block; width: 38%; height: 5px; border-radius: 99px; background: var(--ink); }
.yao.yang { gap: 0; }
.yao.yang i:first-child { width: 78%; }
.yao.yang i:nth-child(2) { display: none; }
.yao.moving i { box-shadow: 0 0 0 2px rgba(156, 43, 36, 0.25); }
.ai {
  white-space: pre-wrap;
  background: #fffaf0;
  padding: 14px;
  border-radius: 8px;
  border: 1px dashed var(--line);
  font: 15px/1.7 var(--serif);
}
.ai h3 { font: 18px/1.35 var(--serif); color: var(--gold); margin: 16px 0 8px; }
.ai strong { font-weight: 700; }
.followup { margin-top: 16px; padding-top: 14px; border-top: 1px dashed var(--line); }
.followup-thread { display: grid; gap: 10px; margin-bottom: 12px; max-height: 420px; overflow: auto; }
.followup-turn { padding: 10px 12px; border-radius: 8px; font: 15px/1.65 var(--serif); white-space: pre-wrap; }
.followup-turn.user { background: rgba(138, 90, 28, 0.08); }
.followup-turn.assistant { background: #fffaf0; border: 1px dashed var(--line); }
.followup-turn h3 { font: 18px/1.35 var(--serif); color: var(--gold); margin: 12px 0 6px; }
.followup-form { display: grid; gap: 8px; }
@media (min-width: 560px) {
  .followup-form { grid-template-columns: minmax(0, 1fr) 88px; align-items: stretch; }
  .followup-form .btn { margin-top: 0; width: auto; }
}
.error { color: var(--seal); }
@media (max-width: 700px) {
  h1 { font-size: 32px; }
  .yao-picks, .ww-row { grid-template-columns: 1fr 1fr; }
}