/* ageflag.com — 浅色、纸白底、单一强调色(深青)+ 提醒色(橙);系统字体,不加载外部字体。 */
:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --ink: #1b2430;
  --muted: #4f5966;
  --line: #e3dfd6;
  --accent: #0b6466;
  --accent-soft: #e6f2f1;
  --flag: #b4400b;
  --flag-soft: #fff2e8;
  --note: #f5f3ee;
  --focus: #1d4ed8;
  --radius: 10px;
  --wrap: 72rem;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  color-scheme: light;
}
:lang(zh) { --font: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif; }
:lang(ja) { --font: system-ui, -apple-system, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", Meiryo, "Noto Sans CJK JP", sans-serif; }

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 400 1.0625rem/1.65 var(--font);
}
a { color: var(--accent); text-underline-offset: 0.18em; }
a:hover { color: #08494b; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 4px; }
img, svg { max-width: 100%; height: auto; }
h1, h2, h3 { line-height: 1.25; margin: 1.6em 0 0.5em; letter-spacing: -0.01em; }
h1 { font-size: clamp(1.75rem, 1.2rem + 2vw, 2.4rem); margin-top: 0.4em; }
h2 { font-size: 1.45rem; }
h3 { font-size: 1.15rem; }
p, ul, ol { margin: 0 0 1em; }
small, .small { font-size: 0.875rem; }
.muted { color: var(--muted); }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 1rem; }
.skip { position: absolute; left: -999px; top: 0; background: var(--ink); color: #fff; padding: 0.5rem 1rem; z-index: 10; }
.skip:focus { left: 0.5rem; }

/* 顶栏 */
.top { background: var(--surface); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; min-height: 3.75rem; }
.brand { display: inline-flex; align-items: center; gap: 0.5rem; font-weight: 700; font-size: 1.15rem; color: var(--ink); text-decoration: none; }
.brand svg { width: 1.6rem; height: 1.6rem; }
.nav { display: flex; gap: 0.25rem 1rem; flex-wrap: wrap; margin-left: auto; font-size: 0.95rem; }
.nav a { color: var(--ink); text-decoration: none; padding: 0.35rem 0; }
.nav a[aria-current="page"], .nav a:hover { color: var(--accent); text-decoration: underline; }
.langs { font-size: 0.9rem; }
.langs summary { cursor: pointer; padding: 0.35rem 0.6rem; border: 1px solid var(--line); border-radius: 999px; list-style: none; }
.langs summary::-webkit-details-marker { display: none; }
.langs ul { position: absolute; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 0.4rem 0; margin: 0.3rem 0 0; list-style: none; z-index: 5; box-shadow: 0 6px 20px rgba(0,0,0,.08); }
.langs li a { display: block; padding: 0.3rem 1rem; color: var(--ink); text-decoration: none; }
.langs li a:hover { background: var(--accent-soft); }
.langs { position: relative; }

/* 提示条 */
.notice { background: var(--note); border-bottom: 1px solid var(--line); font-size: 0.9rem; }
.notice .wrap { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.langhint { background: var(--accent-soft); font-size: 0.95rem; }
.langhint[hidden] { display: none; }
.langhint .wrap { display: flex; gap: 1rem; align-items: center; padding-top: 0.5rem; padding-bottom: 0.5rem; }
.langhint button { margin-left: auto; background: none; border: 0; font: inherit; color: var(--muted); cursor: pointer; }

main { padding: 1.5rem 0 3rem; }
.crumbs { font-size: 0.875rem; color: var(--muted); margin-bottom: 0.5rem; }
.crumbs ol { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 0.25rem; }
.crumbs li + li::before { content: "›"; margin: 0 0.35rem; color: var(--line); }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 46rem; }
.meta { font-size: 0.875rem; color: var(--muted); }

/* 卡片、网格 */
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.1rem; }
.card h3 { margin-top: 0; }
a.card { display: block; color: var(--ink); text-decoration: none; }
a.card:hover { border-color: var(--accent); }
.pill { display: inline-block; font-size: 0.8rem; padding: 0.1rem 0.55rem; border-radius: 999px; background: var(--accent-soft); color: var(--accent); }
.pill.flag { background: var(--flag-soft); color: var(--flag); }
.flag-text { color: var(--flag); }

/* 地区切换:纯 CSS(单选按钮),正文全部在 HTML 里 */
.regions { margin: 1rem 0 0; }
.regions > input { position: absolute; opacity: 0; pointer-events: none; }
.regions .tabs { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 0.75rem; }
.regions .tabs label { cursor: pointer; border: 1px solid var(--line); background: var(--surface); padding: 0.35rem 0.8rem; border-radius: 999px; font-size: 0.92rem; }
.regions .panel { display: none; }

table { border-collapse: collapse; width: 100%; background: var(--surface); font-size: 0.95rem; }
th, td { text-align: left; vertical-align: top; padding: 0.55rem 0.7rem; border-bottom: 1px solid var(--line); }
th { font-weight: 600; background: var(--note); }
.tablewrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }

.box { border-left: 4px solid var(--accent); background: var(--surface); padding: 0.8rem 1rem; border-radius: 0 var(--radius) var(--radius) 0; margin: 1rem 0; }
.box.flag { border-left-color: var(--flag); background: var(--flag-soft); }
.box.ancestry { border-left-color: #6d5bd0; }
.box h3 { margin-top: 0; }

.sources { font-size: 0.9rem; }
.sources li { margin-bottom: 0.35rem; }

/* 页脚 */
.foot { background: var(--surface); border-top: 1px solid var(--line); font-size: 0.9rem; color: var(--muted); padding: 2rem 0; }
.foot h2 { font-size: 1rem; color: var(--ink); margin: 0 0 0.5rem; }
.foot .cols { display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); }
.foot ul { list-style: none; padding: 0; }
.foot li { margin: 0.2rem 0; }
.foot li a { display: inline-block; padding: 0.35rem 0; min-height: 24px; }   /* 触控目标 ≥24px(Lighthouse target-size) */
.foot a { color: var(--muted); }

/* 清单工具 */
.form { display: grid; gap: 0.9rem; grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr)); align-items: end; }
.form label { display: block; font-weight: 600; font-size: 0.92rem; margin-bottom: 0.25rem; }
.form input, .form select { width: 100%; font: inherit; padding: 0.5rem 0.6rem; border: 1px solid #b9b4a9; border-radius: 8px; background: #fff; }
.btn { font: inherit; font-weight: 600; background: var(--accent); color: #fff; border: 0; border-radius: 999px; padding: 0.6rem 1.2rem; cursor: pointer; }
.btn.secondary { background: var(--surface); color: var(--accent); border: 1px solid var(--accent); }

@media print {
  .top, .notice, .langhint, .foot .cols > :not(.keep), .noprint { display: none !important; }
  body { background: #fff; }
}

/* ---- 地区切换(纯 CSS) ---- */
#rg-US:checked ~ .panels .p-US, #rg-UK:checked ~ .panels .p-UK, #rg-CN:checked ~ .panels .p-CN,
#rg-JP:checked ~ .panels .p-JP, #rg-ES:checked ~ .panels .p-ES, #rg-BR:checked ~ .panels .p-BR { display: block; }
#rg-US:checked ~ .tabs label[for="rg-US"], #rg-UK:checked ~ .tabs label[for="rg-UK"], #rg-CN:checked ~ .tabs label[for="rg-CN"],
#rg-JP:checked ~ .tabs label[for="rg-JP"], #rg-ES:checked ~ .tabs label[for="rg-ES"], #rg-BR:checked ~ .tabs label[for="rg-BR"] {
  background: var(--accent); color: #fff; border-color: var(--accent); }
.regions > input:focus-visible + * , .regions > input:focus-visible ~ .tabs label { outline: none; }
.regions .tabs label:hover { border-color: var(--accent); }

/* ---- AI 标注、摘要框、热线 ---- */
.ailabel { margin: -0.2rem 0 1rem; font-size: 0.95rem; color: var(--muted); }
.ailabel .pill { margin-right: 0.3rem; font-weight: 700; }
.summary p { margin-bottom: 0.4rem; }
.hl-country { margin: 0.25rem 0; }
.hl-country strong { margin-right: 0.4rem; }
.hl { display: inline-block; margin: 0.1rem 0.8rem 0.1rem 0; }
.hl a { font-weight: 700; font-size: 1.05rem; }
.hl-k { color: var(--muted); font-size: 0.85rem; }
.hl-off { font-weight: 600; }
.box.flag h2 { margin-top: 0; font-size: 1.15rem; }

/* ---- 内容块 ---- */
.facts { padding-left: 1.2rem; }
.facts li { margin-bottom: 0.45rem; }
.sexnav, .bandnav ul { display: flex; flex-wrap: wrap; gap: 0.4rem; list-style: none; padding: 0; margin: 0.5rem 0 1rem; }
.sexnav a, .bandnav a { display: inline-block; padding: 0.3rem 0.8rem; border: 1px solid var(--line); border-radius: 999px; text-decoration: none; color: var(--ink); background: var(--surface); font-size: 0.92rem; }
.sexnav a[aria-current="page"], .bandnav a[aria-current="page"] { background: var(--accent); color: #fff; border-color: var(--accent); }
.bandnav { margin-top: 2rem; border-top: 1px solid var(--line); padding-top: 1rem; }
.placeholders { font-size: 0.92rem; color: var(--muted); }
.starts { padding-left: 1.2rem; }
.doses { margin: 0; padding-left: 1.1rem; }
.faq { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 0.6rem 0.9rem; margin-bottom: 0.5rem; }
.faq summary { cursor: pointer; font-weight: 600; }
.prose { max-width: 46rem; }
.multi { margin-top: 1rem; }
.cols2 { columns: 2 16rem; padding-left: 1.2rem; }
data { font-variant-numeric: tabular-nums; }
table.compare td div + div { margin-top: 0.4rem; border-top: 1px dashed var(--line); padding-top: 0.4rem; }
table.pop td:nth-child(3), table.pop td:nth-child(4) { text-align: right; }
.meta { margin: 0.2rem 0 1rem; }

/* ---- 手机:表格转卡片 ---- */
@media (max-width: 720px) {
  table.recs thead { display: none; }
  table.recs, table.recs tbody, table.recs tr, table.recs td { display: block; width: 100%; }
  table.recs tr { border-bottom: 2px solid var(--line); padding: 0.4rem 0; }
  table.recs td { border: 0; padding: 0.25rem 0.7rem; }
  table.recs td[data-l]::before { content: attr(data-l); display: block; font-size: 0.78rem; color: var(--muted); font-weight: 600; }
  .nav { width: 100%; margin-left: 0; }
  h1 { font-size: 1.6rem; }
}
@media print {
  .regions .panel { display: block !important; }
  .regions .tabs, .sexnav, .bandnav, #cl-form, .langs, .skip { display: none !important; }
  .ailabel, .summary, #hotlines { display: block !important; }
  a[href^="http"]::after { content: " (" attr(href) ")"; font-size: 0.8em; color: #555; }
}