:root {
  --teal: #0f766e;
  --teal-dark: #0b5c56;
  --teal-soft: #e6f4f1;
  --ink: #17212b;
  --muted: #667085;
  --line: #e4e9ee;
  --paper: #f7faf9;
  --white: #fff;
  --shadow: 0 16px 44px rgba(15, 60, 55, .10);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font: 16px/1.8 -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 820px; margin: 0 auto; padding: 0 22px; }
.site-head { background: #fff; border-bottom: 1px solid var(--line); }
.head-inner { max-width: 820px; margin: 0 auto; padding: 0 22px; height: 64px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; }
.brand-mark { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; background: linear-gradient(145deg, var(--teal), #14a394); color: #fff; font-weight: 800; font-size: 15px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text b { font-size: 15px; }
.brand-text small { color: var(--muted); font-size: 11px; margin-top: 2px; }
.nav-back { font-size: 14px; color: var(--muted); }
.crumbs { font-size: 13px; color: var(--muted); padding: 18px 0 0; }
.crumbs a { color: var(--muted); }
article { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 36px 40px 40px; margin: 18px 0 32px; box-shadow: 0 10px 30px rgba(15,60,55,.05); }
h1 { text-wrap: balance; font-size: 28px; line-height: 1.35; margin: 0 0 10px; letter-spacing: -.01em; }
.meta { color: var(--muted); font-size: 13px; margin: 0 0 24px; padding-bottom: 18px; border-bottom: 1px dashed var(--line); }
h2 { font-size: 21px; margin: 32px 0 12px; line-height: 1.45; }
h3 { font-size: 17px; margin: 22px 0 8px; }
p { margin: 0 0 14px; color: #2f3b47; }
ul, ol { margin: 0 0 16px; padding-left: 22px; color: #2f3b47; }
li { margin: 6px 0; }
.lead { font-size: 17px; color: #35424f; }
.tip { background: var(--teal-soft); border-left: 3px solid var(--teal); border-radius: 0 10px 10px 0; padding: 14px 18px; margin: 18px 0; font-size: 15px; color: #24534f; }
.tip b { color: var(--teal-dark); }
table { width: 100%; border-collapse: collapse; margin: 14px 0 20px; font-size: 14.5px; }
th, td { border: 1px solid var(--line); padding: 9px 12px; text-align: left; vertical-align: top; }
th { background: var(--paper); font-weight: 650; }
.cta { background: linear-gradient(145deg, #0f766e, #14a394); color: #fff; border-radius: 14px; padding: 24px 26px; margin: 30px 0 6px; }
.cta h3 { margin: 0 0 6px; color: #fff; font-size: 18px; }
.cta p { color: rgba(255,255,255,.9); margin: 0 0 14px; font-size: 14.5px; }
.cta a { display: inline-block; background: #fff; color: var(--teal-dark); font-weight: 700; padding: 9px 18px; border-radius: 9px; font-size: 14.5px; }
.related { margin: 8px 0 34px; }
.related h3 { font-size: 15px; color: var(--muted); font-weight: 600; margin: 0 0 10px; }
.related ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.related li { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 12px 16px; margin: 0; font-size: 15px; }
.disclaimer { font-size: 12.5px; color: var(--muted); border-top: 1px solid var(--line); padding-top: 18px; margin-top: 26px; line-height: 1.7; }
.site-foot { border-top: 1px solid var(--line); background: #fff; padding: 22px 0 34px; font-size: 12.5px; color: var(--muted); }
.site-foot .wrap { display: grid; gap: 4px; }
.site-foot a { color: var(--muted); }
@media (max-width: 640px) {
  article { padding: 24px 20px 28px; border-radius: 12px; }
  h1 { font-size: 24px; }
  h2 { font-size: 19px; }
  .head-inner { height: 58px; }
  table { font-size: 13.5px; }
  th, td { padding: 7px 9px; }
}