:root {
  --paper: #f5efe3;
  --ink: #2b2620;
  --ink-soft: #6f6556;
  --line: #cfc4af;
  --seal: #b5342a;
  --serif: "Songti SC", "STSong", "Noto Serif CJK SC", "Source Han Serif SC", "SimSun", "Songti TC", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-tap-highlight-color: transparent;
}

.page {
  max-width: 480px;
  margin: 0 auto;
  padding: 40px 20px calc(32px + env(safe-area-inset-bottom));
}

.head { text-align: center; }
.head h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: 30px;
  font-weight: 700;
  letter-spacing: 0.16em;
  padding-left: 0.16em; /* 抵消末尾字距，视觉居中 */
}
.sub { margin: 14px 0 0; color: var(--ink-soft); letter-spacing: 0.08em; }

.pick { margin-top: 36px; text-align: center; }
.privacy { margin: 14px 0 0; font-size: 13px; color: var(--ink-soft); }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.btn {
  display: inline-block;
  min-width: 140px;
  padding: 12px 24px;
  border: 1px solid var(--ink);
  border-radius: 2px;
  background: transparent;
  color: var(--ink);
  font: inherit;
  letter-spacing: 0.1em;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  user-select: none;
}
.btn.primary { background: var(--ink); color: var(--paper); }
.btn:active { opacity: 0.75; }
#pickBtn { min-width: 220px; }

.msg {
  margin: 24px 0 0;
  padding: 12px 14px;
  border-left: 3px solid var(--seal);
  background: rgba(181, 52, 42, 0.07);
  font-size: 14px;
}
.msg[hidden], .result[hidden] { display: none; }

.result { margin-top: 36px; }

.thumbwrap { text-align: center; }
.thumbwrap img {
  display: block;
  max-width: 100%;
  height: auto;
  max-height: 220px;
  margin: 0 auto;
  border: 1px solid var(--line);
  padding: 4px;
  background: #fffdf8;
}

.rows { list-style: none; margin: 24px 0 0; padding: 0; border-top: 1px solid var(--line); }
.row {
  display: flex;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.swatch {
  position: relative;
  flex: 0 0 76px;
  height: 76px;
  padding: 0;
  border: 1px solid rgba(0, 0, 0, 0.12);
  border-radius: 2px;
  cursor: pointer;
  font: inherit;
}
.swatch .swap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 4px;
  font-size: 11px;
  letter-spacing: 0.04em;
  opacity: 0.85;
}
.info { min-width: 0; flex: 1; }
.name { font-family: var(--serif); font-size: 22px; font-weight: 700; line-height: 1.3; letter-spacing: 0.08em; }
.pinyin { margin-left: 6px; font-family: var(--sans); font-size: 12px; font-weight: 400; letter-spacing: 0.02em; color: var(--ink-soft); }
.meta { margin-top: 2px; font-size: 13px; color: var(--ink-soft); }
.meta .hex { font-family: var(--mono); color: var(--ink); }
.desc { margin: 6px 0 0; font-size: 13px; line-height: 1.55; color: var(--ink-soft); }

.tip { margin: 12px 0 0; font-size: 12px; color: var(--ink-soft); text-align: center; }

.sec {
  margin: 40px 0 16px;
  font-family: var(--serif);
  font-size: 18px;
  letter-spacing: 0.3em;
  text-align: center;
  font-weight: 400;
}
.cardwrap { box-shadow: 0 6px 24px rgba(60, 40, 20, 0.16); background: #fff; }
.cardwrap img { display: block; width: 100%; height: auto; -webkit-touch-callout: default; }
.hint { margin: 16px 0 0; text-align: center; font-family: var(--serif); font-size: 17px; letter-spacing: 0.2em; color: var(--seal); }
.actions { display: flex; gap: 12px; justify-content: center; margin-top: 16px; flex-wrap: wrap; }
.small { margin: 12px 0 0; font-size: 12px; color: var(--ink-soft); text-align: center; }

.foot { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 12px; color: var(--ink-soft); text-align: center; }
.foot p { margin: 0; }
.foot a { color: inherit; }

@media (prefers-reduced-motion: no-preference) {
  .btn, .swatch { transition: opacity 0.15s; }
}