:root {
  --orange: #e85d04;
  --orange-d: #bc4500;
  --cream: #fff6eb;
  --ink: #2c3338;
  --muted: #5c676e;
  --card: #ffffff;
  --line: #f0d2b3;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Trebuchet MS", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--cream);
  color: var(--ink);
  line-height: 1.75;
}

.head {
  background: #fff;
  box-shadow: 0 1px 0 var(--line);
}
.head-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 18px 20px 0;
}
.mark {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--orange-d);
  font-size: 22px;
  font-weight: 800;
}
.head nav {
  display: flex;
  gap: 18px;
  margin-top: 14px;
  padding-bottom: 2px;
}
.head nav a {
  text-decoration: none;
  color: var(--muted);
  padding-bottom: 10px;
  border-bottom: 3px solid transparent;
}
.head nav a.active {
  color: var(--orange-d);
  border-bottom-color: var(--orange);
  font-weight: 700;
}

.hero {
  max-width: 760px;
  margin: 0 auto;
  padding: 36px 20px 10px;
}
.hero h1 {
  font-size: 30px;
  line-height: 1.35;
  margin: 0 0 14px;
}
.num-row {
  display: flex;
  gap: 8px;
  margin: 16px 0;
}
.num-row span {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--orange);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
}

.btn {
  display: inline-block;
  text-decoration: none;
  border-radius: 999px;
  padding: 11px 20px;
  font-weight: 700;
  margin: 0 8px 8px 0;
}
.btn-orange { background: var(--orange); color: #fff; }
.btn-dark { background: var(--ink); color: #fff; }
.btn-line { border: 2px solid var(--orange); color: var(--orange-d); }

.col {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px 48px;
}
.step {
  background: var(--card);
  border-radius: 10px;
  box-shadow: 0 10px 28px rgba(232, 93, 4, 0.08);
  margin: 22px 0;
  padding: 20px 22px 10px 84px;
  position: relative;
  border-left: 6px solid var(--orange);
}
.step .n {
  position: absolute;
  left: 16px;
  top: 18px;
  font-size: 32px;
  font-weight: 800;
  color: var(--orange);
  line-height: 1;
}
.step h2 { font-size: 20px; margin: 0 0 10px; }

section.plain { margin: 28px 0; }
h2 { font-size: 22px; margin: 0 0 10px; }

.req {
  background: #fff;
  border: 1px dashed var(--orange);
  border-radius: 10px;
  padding: 16px 18px;
}

.faq details,
.faq .qa {
  background: #fff;
  border-radius: 8px;
  padding: 12px 14px;
  margin: 10px 0;
  border: 1px solid var(--line);
}
.faq h3 { font-size: 16px; margin: 0 0 6px; color: var(--orange-d); }
.faq p { margin: 0; }

footer {
  background: var(--ink);
  color: #d7dde1;
  font-size: 13px;
  line-height: 1.8;
  padding: 26px 0 34px;
}
footer .col { padding-bottom: 0; }
footer a { color: #ffd0b0; }
footer .safe { color: #ffc091; }

.dl-stack article {
  background: #fff;
  border-radius: 10px;
  padding: 16px;
  margin: 12px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--line);
}

ol, ul { padding-left: 20px; }
li { margin-bottom: 8px; }

@media (max-width: 640px) {
  .step { padding: 56px 16px 10px 16px; }
  .step .n { left: 16px; top: 12px; }
  .dl-stack article { flex-direction: column; align-items: flex-start; }
}