:root {
  --ink: #142226;
  --teal: #0c5c5c;
  --amber: #d97706;
  --mist: #e7f4f3;
  --line: #c9e0de;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  color: var(--ink);
  background: #f4fbfb;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.8;
  font-size: 16.5px;
}
a { color: var(--teal); }
.topbar {
  background: #fff;
  border-bottom: 3px solid var(--teal);
  padding: 14px 4vw 0;
}
.brandline { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; color: var(--teal); text-decoration: none; }
.brandline svg { width: 26px; height: 26px; }
.nav { display: flex; gap: 8px; margin-top: 12px; }
.nav a {
  text-decoration: none;
  color: var(--ink);
  padding: 8px 14px;
  border-radius: 999px 999px 0 0;
}
.nav a[aria-current="page"] { background: var(--teal); color: #fff; }
.shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 22px 18px 50px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 26px;
  align-items: start;
}
.rail {
  position: sticky;
  top: 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-top: 6px solid var(--amber);
  padding: 16px;
}
.rail h2 { font-size: 18px; margin: 0 0 8px; }
.rail p { margin: 0 0 10px; font-size: 14px; }
.rail .btn { display: block; margin: 0 0 8px; text-align: center; }
.hero {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 18px;
  background: var(--mist);
  padding: 22px;
  margin-bottom: 18px;
}
.hero h1 { margin: 0 0 10px; font-size: 34px; line-height: 1.3; color: #083f3f; }
.marks { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 12px 0; list-style: none; }
.marks li { background: #fff; border-radius: 999px; padding: 4px 10px; font-size: 13px; border: 1px solid var(--line); }
.panel {
  background: var(--teal);
  color: #f3fffe;
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
}
.panel strong { font-size: 18px; }
.btn {
  display: inline-block;
  background: var(--teal);
  color: #fff;
  text-decoration: none;
  border-radius: 999px;
  padding: 10px 16px;
  font-weight: 700;
}
.btn.alt { background: #fff; color: var(--teal); border: 1px solid var(--teal); }
.btn.warn { background: var(--amber); color: #1f1303; }
.section { margin: 0 0 22px; background: #fff; border: 1px solid var(--line); padding: 16px 18px 8px; }
.section h2 { margin: 0 0 8px; font-size: 24px; color: #0a4c4c; }
.num { float: left; font-size: 28px; color: var(--amber); font-weight: 800; margin-right: 8px; line-height: 1; }
.cards { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.prose-list h3 { margin: 14px 0 4px; color: #0a4c4c; }
.prose-list p { margin-top: 0; }
.card, .qa, .news-item { border: 1px solid var(--line); padding: 10px 12px; background: #fbffff; }
.card h3, .qa h3, .news-item h3 { margin: 0 0 4px; font-size: 16.5px; }
table { width: 100%; border-collapse: collapse; margin-bottom: 12px; }
th, td { border-bottom: 1px solid var(--line); text-align: left; padding: 7px 6px; vertical-align: top; }
ol.steps li { margin-bottom: 8px; }
.news-item time { color: #5d7070; font-size: 13px; }
.site-foot { background: #123233; color: #d5eeee; padding: 22px 6vw; font-size: 14px; }
.site-foot p { margin: 0 0 6px; }
.site-foot a { color: #f6d7a8; }
@media (max-width: 960px) {
  .shell, .hero, .cards { grid-template-columns: 1fr; }
  .rail { position: static; }
}