*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0; background: #f4fbf6; color: #14261b;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 19px; line-height: 1.65;
  border-left: 8px solid #166534;
}
a { color: #166534; }
:focus-visible { outline: 3px solid #166534; outline-offset: 2px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 12px; background: #fff; padding: 8px 12px; }
header { padding: 22px 28px 0; }
.brand { font-weight: 800; font-size: 15px; letter-spacing: 0.08em; text-decoration: none; color: #166534; }
nav { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0 0; }
nav a {
  text-decoration: none; background: #fff; color: #14261b; border-radius: 999px;
  padding: 8px 14px; border: 1px solid #cfe6d6;
}
nav a[aria-current="page"] { background: #166534; color: #fff; border-color: #166534; }
main { max-width: 820px; padding: 12px 28px 48px; }
h1 { font-size: 40px; line-height: 1.2; margin: 12px 0; letter-spacing: -0.03em; }
.step {
  display: grid; grid-template-columns: 76px minmax(0, 1fr); gap: 14px;
  background: #fff; border-radius: 22px; padding: 18px 18px 8px; margin: 12px 0;
  box-shadow: 0 1px 0 rgba(20,38,27,0.04);
}
.num {
  width: 64px; height: 64px; border-radius: 50%; background: #dcfce7; color: #166534;
  display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 22px;
}
h2 { font-size: 22px; margin: 6px 0 8px; }
.note { background: #fef9c3; border-radius: 16px; padding: 12px 16px; }
.cta { display: inline-block; background: #166534; color: #fff; text-decoration: none; border-radius: 999px; padding: 12px 18px; font-weight: 700; }
.crumbs ol { display: flex; gap: 8px; list-style: none; padding: 0; font-size: 14px; }
footer { padding: 10px 28px 36px; font-size: 14px; color: #3f6212; max-width: 820px; }
::selection { background: #166534; color: #fff; }
@media (max-width: 640px) {
  h1 { font-size: 32px; }
  .step { grid-template-columns: 1fr; }
}