:root {
  --amber: #D97706;
  --amber-bar: #F59E0B;
  --cream: #FBF6EB;
  --cream-2: #FFF9EE;
  --ink: #3D2F1F;
  --line: #E8D7B5;
  --warn-bg: #FFF4D6;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--cream);
  color: var(--ink);
  font-family: Georgia, "Songti SC", "SimSun", serif;
  line-height: 1.75;
  font-size: 17px;
}

a {
  color: #92400E;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.wrap {
  width: min(860px, calc(100% - 36px));
  margin: 0 auto;
}

.top {
  padding: 16px 0 12px;
}

.brand {
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  font-weight: 700;
  font-size: 15px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin-top: 10px;
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  font-size: 13px;
}

.hero {
  padding: 10px 0 18px;
}

.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.3;
}

.hero p {
  margin: 0 0 10px;
}

.warn-bar {
  background: var(--warn-bg);
  border-left: 6px solid var(--amber-bar);
  padding: 12px 14px;
  margin: 0 0 18px;
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  font-size: 14px;
}

.diag {
  list-style: none;
  margin: 0;
  padding: 0 0 28px;
}

.diag > li {
  background: var(--cream-2);
  border: 1px solid var(--line);
  margin-bottom: 18px;
  padding: 0;
}

.diag .head {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 16px 16px 0;
}

.num {
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  font-weight: 700;
  color: var(--amber);
  font-size: 28px;
  line-height: 1;
  min-width: 2.2em;
}

.diag h2 {
  margin: 0;
  font-size: 20px;
  line-height: 1.35;
}

.diag .body {
  padding: 12px 16px 16px 16px;
}

.diag p {
  margin: 0 0 10px;
}

.steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 12px 0;
  padding: 0;
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  font-size: 14px;
}

.steps li {
  list-style: none;
  border-top: 1px dashed var(--line);
  padding: 8px 0 8px 28px;
  position: relative;
}

.steps li::before {
  content: attr(data-n);
  position: absolute;
  left: 0;
  color: var(--amber);
  font-weight: 700;
}

.svg-strip {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 12px 0;
}

.svg-card {
  background: #fff;
  border: 1px solid var(--line);
  padding: 10px 12px;
  flex: 1;
  min-width: 130px;
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  font-size: 13px;
}

.svg-card svg {
  display: block;
  margin-bottom: 6px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  margin: 12px 0;
  background: #fff;
}

th,
td {
  border: 1px solid var(--line);
  padding: 7px 8px;
  text-align: left;
}

th {
  background: var(--warn-bg);
}

.cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  font-size: 14px;
}

.cols div {
  background: #fff;
  border: 1px solid var(--line);
  padding: 10px;
}

.faq {
  padding-bottom: 32px;
}

.faq h2 {
  font-size: 22px;
}

.faq article {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.faq h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.faq p {
  margin: 0 0 8px;
}

.foot {
  border-top: 3px solid var(--amber-bar);
  padding: 18px 0 32px;
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  font-size: 13px;
  color: #6B5428;
}

.foot p {
  margin: 0 0 8px;
}

@media (max-width: 700px) {
  .cols {
    grid-template-columns: 1fr;
  }

  .diag .head {
    flex-direction: column;
  }
}