:root {
  --bg: #f3f7f3;
  --ink: #14241b;
  --green: #1b4332;
  --leaf: #2d6a4f;
  --line: #c9d6cc;
  --card: #ffffff;
  --mute: #4d5e54;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.85;
}

.rail { width: min(800px, calc(100% - 32px)); margin: 0 auto; }
.wide { width: min(980px, calc(100% - 32px)); margin: 0 auto; }

.head {
  background: var(--green);
  color: #f3f7f3;
}
.head-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}
.word {
  color: #f3f7f3;
  text-decoration: none;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}
.steps-nav a {
  color: #d8ebe1;
  text-decoration: none;
  margin-left: 16px;
  font-size: 14px;
}
.steps-nav a.current { color: #fff; border-bottom: 2px solid #95d5b2; }
.burger {
  display: none;
  background: transparent;
  color: #fff;
  border: 1px solid #95d5b2;
}

.hero-step {
  padding: 40px 0 10px;
}
.hero-step h1 {
  font-size: 30px;
  line-height: 1.4;
  margin: 0 0 14px;
}
.big-dl {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--leaf);
  color: #fff;
  text-decoration: none;
  padding: 14px 20px;
  font-weight: 700;
  margin: 8px 8px 0 0;
}
.ghost {
  display: inline-flex;
  padding: 14px 20px;
  color: var(--leaf);
  text-decoration: none;
  border: 1px solid var(--leaf);
}

.unit { padding: 22px 0 8px; }
.unit h2 { font-size: 22px; margin: 0 0 10px; color: var(--green); }
.numline {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 16px;
  margin: 18px 0;
}
.badge {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--green);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 22px;
  font-weight: 700;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 16px 18px;
}

table.plain {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
}
table.plain th, table.plain td {
  border: 1px solid var(--line);
  padding: 9px 10px;
  text-align: left;
}

.faq-stack details {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 10px 14px;
  margin: 8px 0;
}
.faq-stack summary { cursor: pointer; font-weight: 700; }
.faq-stack p { color: var(--mute); }

.tail {
  margin-top: 36px;
  background: #08140e;
  color: #d7e6dc;
  padding: 24px 0;
  font-size: 14px;
}
.tail .safe { color: #fff; margin: 0 0 8px; }
.tail .copy { margin: 0; }

@media (max-width: 720px) {
  .burger { display: block; }
  .steps-nav {
    display: none;
    position: absolute;
    right: 12px;
    top: 64px;
    background: #1b4332;
    padding: 10px;
  }
  .steps-nav.open { display: block; }
  .head { position: relative; }
  .steps-nav a { display: block; margin: 8px 0; }
  .numline { grid-template-columns: 1fr; }
}