:root {
  --bg: #f4f7f8;
  --surface: #fff;
  --text: #14212b;
  --muted: #60717c;
  --line: #dce6e8;
  --teal: #0f827c;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
  line-height: 1.65;
}

.manual {
  width: min(1180px, calc(100% - 28px));
  margin: 0 auto;
  padding: 28px 0 48px;
}

.manual-hero,
.card {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: 0 10px 28px rgba(20, 38, 50, 0.06);
}

.manual-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 22px;
  align-items: center;
  padding: 26px;
  margin-bottom: 16px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--teal);
  font-weight: 900;
  letter-spacing: 0.04em;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.18;
}

h2 {
  margin-bottom: 14px;
  font-size: 26px;
}

h3 {
  margin: 20px 0 8px;
  font-size: 19px;
}

.manual-hero p:not(.eyebrow),
.card p,
li,
figcaption,
td {
  color: #40545f;
}

.manual-actions {
  display: grid;
  gap: 10px;
}

.manual-actions a {
  min-width: 150px;
  border: 1px solid #b9dedb;
  border-radius: 999px;
  padding: 8px 14px;
  color: var(--teal);
  background: #f1fbfa;
  text-align: center;
  font-weight: 800;
  text-decoration: none;
}

.card {
  padding: 22px;
  margin: 16px 0;
}

.grid {
  display: grid;
  gap: 14px;
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

article,
.notice,
details {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  background: #fbfdfd;
}

.notice {
  display: grid;
  gap: 4px;
  margin-top: 14px;
}

.notice strong,
.steps b {
  color: var(--teal);
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 10px;
  text-align: left;
  vertical-align: top;
}

th {
  color: #243943;
  background: #eef5f5;
}

figure {
  margin: 16px 0;
}

figure img {
  display: block;
  width: 100%;
  max-height: 780px;
  object-fit: contain;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
}

figcaption {
  margin-top: 8px;
  font-size: 14px;
}

.steps {
  display: grid;
  gap: 10px;
}

.steps article {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 12px;
}

code {
  border-radius: 6px;
  padding: 2px 6px;
  background: #eef5f5;
  color: #0f5f5a;
  font-weight: 800;
}

summary {
  color: #243943;
  cursor: pointer;
  font-weight: 900;
}

details + details {
  margin-top: 10px;
}

@media (max-width: 900px) {
  .manual-hero,
  .grid.two,
  .grid.three,
  .steps article {
    grid-template-columns: 1fr;
  }

  .manual-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .manual {
    width: min(100% - 18px, 1180px);
    padding-top: 10px;
  }

  .manual-hero,
  .card {
    border-radius: 12px;
    padding: 16px;
  }

  .manual-actions {
    grid-template-columns: 1fr;
  }
}