* { box-sizing: border-box; }
body {
  margin: 0;
  background: #fff7ed;
  color: #1c1917;
  font-family: "Trebuchet MS", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}

.head {
  background: #c2410c;
  color: #fff7ed;
}
.head-row {
  width: min(1100px, calc(100% - 24px));
  margin: 0 auto;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.mark {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #fff7ed;
  text-decoration: none;
  font-weight: 800;
  font-size: 20px;
}
nav.jump a {
  color: #fed7aa;
  text-decoration: none;
  margin-left: 14px;
}
nav.jump a.here { color: #fff; font-weight: 700; }

.frame {
  width: min(1100px, calc(100% - 24px));
  margin: 24px auto 40px;
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 22px;
  align-items: start;
}
.hero-step {
  background: #9a3412;
  color: #fff7ed;
  padding: 28px 26px;
}
.hero-step h1 { margin: 6px 0 12px; font-size: 30px; line-height: 1.35; }
.do {
  display: inline-block;
  background: #fbbf24;
  color: #1c1917;
  text-decoration: none;
  font-weight: 800;
  padding: 11px 16px;
  margin-right: 8px;
  margin-top: 10px;
}
.do.light { background: #fff7ed; }

.timeline { border-left: 4px solid #fdba74; margin: 8px 0 0 12px; padding-left: 22px; }
.step {
  background: #fff;
  border: 1px solid #fed7aa;
  padding: 16px 18px 8px;
  margin: 0 0 16px;
  position: relative;
}
.step:before {
  content: attr(data-n);
  position: absolute;
  left: -38px;
  top: 16px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #c2410c;
  color: #fff;
  font-weight: 800;
  text-align: center;
  line-height: 28px;
}
.step h2 { margin: 0 0 8px; font-size: 21px; }
.stick {
  position: sticky;
  top: 12px;
  background: #fff;
  border: 2px solid #c2410c;
  padding: 16px;
}
.stick a { display: block; color: #9a3412; margin: 8px 0; }
.faq-box { background: #fff; border: 1px solid #fed7aa; padding: 16px 18px; margin-bottom: 16px; }
.faq-box h2 { margin-top: 0; }
.faq-box dt { font-weight: 800; margin-top: 12px; }
.faq-box dd { margin: 6px 0 0; }

.tail {
  background: #1c1917;
  color: #e7e5e4;
  padding: 22px 12px 30px;
}
.tail .in { width: min(1100px, calc(100% - 24px)); margin: 0 auto; }
.tail a { color: #fdba74; }
.good { color: #fbbf24; }

@media (max-width: 860px) {
  .frame { grid-template-columns: 1fr; }
  .stick { position: static; }
  .hero-step h1 { font-size: 24px; }
}