/* 行程助手 legal site. System fonts only (no web fonts), no external requests. */
:root {
  --bg: #fbfaf7;
  --text: #1d1d1f;
  --muted: #5f5f66;
  --line: #dedbd2;
  --link: #0b5cad;
  --banner-bg: #fff4d6;
  --banner-text: #5a4300;
  --ph-bg: #ffe9a8;
  --code-bg: #efece4;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17171a;
    --text: #ececef;
    --muted: #a3a3ab;
    --line: #34343a;
    --link: #7db7ff;
    --banner-bg: #3a2f10;
    --banner-text: #ffe39a;
    --ph-bg: #5a4510;
    --code-bg: #26262b;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.75 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  overflow-wrap: anywhere;
}
:lang(zh) { font-family: -apple-system, "PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif; }
:lang(ja) { font-family: -apple-system, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans CJK JP", "Source Han Sans JP", "Yu Gothic", Meiryo, sans-serif; }
header, main, footer { max-width: 46rem; margin: 0 auto; padding: 0 16px; }
header { padding-top: 20px; }
.site { margin: 0; font-weight: 700; font-size: 1.05rem; }
.site a { color: inherit; text-decoration: none; }
.langs, nav { margin: 4px 0 0; font-size: 0.92rem; color: var(--muted); }
nav { padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.banner {
  margin-top: 16px;
  padding: 10px 14px;
  background: var(--banner-bg);
  color: var(--banner-text);
  border-radius: 8px;
  font-weight: 600;
}
main { padding-bottom: 32px; }
h1 { font-size: 1.6rem; line-height: 1.35; margin: 24px 0 12px; }
h2 { font-size: 1.2rem; line-height: 1.4; margin: 32px 0 8px; }
p, ul, ol { margin: 0 0 12px; }
ul, ol { padding-left: 1.4em; }
li { margin: 4px 0; }
li > ul, li > ol { margin: 4px 0 0; }
a { color: var(--link); }
code { background: var(--code-bg); padding: 0 4px; border-radius: 4px; font-size: 0.92em; }
.ph { background: var(--ph-bg); border-radius: 3px; padding: 0 2px; }
.table { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 0 0 16px; }
table { border-collapse: collapse; width: 100%; font-size: 0.94rem; }
th, td { min-width: 5.5em; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: var(--code-bg); }
section { margin: 24px 0; padding-bottom: 8px; border-bottom: 1px solid var(--line); }
footer { padding-bottom: 32px; font-size: 0.85rem; color: var(--muted); }