.manual-page {
  height: auto;
  overflow: auto;
  background: #f4f8f9;
  color: #263c4d;
  line-height: 1.65;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 20;
  padding: 8px 14px;
  border-radius: 8px;
  background: var(--code);
  color: #fff;
  transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }

.manual-topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  padding: 10px max(24px, calc((100vw - 1240px) / 2));
  border-bottom: 1px solid rgba(203, 220, 224, 0.85);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
}
.manual-back {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 40px;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--panel-soft);
  color: var(--ink);
  font-weight: 650;
  text-decoration: none;
}
.manual-back:hover { border-color: #acd5cd; background: var(--accent-soft); }

.manual-hero {
  overflow: hidden;
  border-bottom: 1px solid #dbe9e8;
  background:
    radial-gradient(circle at 82% 15%, rgba(125, 211, 252, 0.26), transparent 26%),
    radial-gradient(circle at 72% 95%, rgba(196, 181, 253, 0.18), transparent 30%),
    linear-gradient(135deg, #f8fdfc, #eff8f7);
}
.manual-hero-inner { max-width: 1240px; margin: auto; padding: 48px 24px 40px; }
.manual-hero .eyebrow { margin: 0 0 8px; }
.manual-hero h1 { margin: 0; color: #17394a; font-size: clamp(30px, 4vw, 44px); line-height: 1.2; letter-spacing: -1.2px; }
.manual-lead { max-width: 700px; margin: 16px 0 24px; color: #567180; font-size: 16px; }
.quick-rules { display: flex; flex-wrap: wrap; gap: 10px 24px; color: #496674; font-size: 13px; }
.quick-rules span { display: inline-flex; align-items: center; gap: 8px; }
.quick-rules b { color: var(--accent-dark); font: 700 11px/1 "Cascadia Code", Consolas, monospace; }

.manual-layout {
  display: grid;
  grid-template-columns: 224px minmax(0, 1fr);
  gap: 40px;
  max-width: 1240px;
  margin: auto;
  padding: 36px 24px 64px;
}
.manual-sidebar { align-self: start; position: sticky; top: 94px; }
.manual-sidebar nav { padding: 18px; border: 1px solid #dfe9eb; border-radius: 16px; background: #fff; box-shadow: var(--shadow); }
.toc-title { margin: 0 0 10px 10px; color: #6b818c; font-size: 11px; font-weight: 800; letter-spacing: 1.5px; }
.manual-sidebar ol { margin: 0; padding: 0; list-style: none; }
.manual-sidebar li + li { margin-top: 3px; }
.manual-sidebar li a { display: flex; align-items: center; gap: 10px; min-height: 38px; padding: 7px 10px; border-radius: 9px; color: #4c6674; font-size: 13px; text-decoration: none; }
.manual-sidebar li a span { color: #91a3ac; font: 10px/1 "Cascadia Code", Consolas, monospace; }
.manual-sidebar li a:hover { background: #eaf6f3; color: var(--accent-dark); }
.manual-sidebar li a:hover span { color: var(--accent); }
.toc-tip { margin-top: 17px; padding: 13px; border-radius: 11px; background: #f1efff; color: #665d8f; font-size: 11px; }
.toc-tip strong { font-size: 12px; }
.toc-tip p { margin: 5px 0 0; }

.manual-content { min-width: 0; max-width: 920px; }
.manual-section { scroll-margin-top: 90px; }
.manual-section + .manual-section { margin-top: 64px; padding-top: 10px; }
.section-heading { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 22px; }
.section-heading .section-number {
  display: grid;
  place-items: center;
  flex: none;
  width: 44px;
  height: 44px;
  border: 1px solid #c9e6df;
  border-radius: 13px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font: 700 13px/1 "Cascadia Code", Consolas, monospace;
}
.section-heading .eyebrow { margin: 0 0 2px; }
.section-heading h2 { margin: 0; color: #193c4d; font-size: 25px; line-height: 1.35; letter-spacing: -0.4px; }
.section-heading p:not(.eyebrow) { margin: 7px 0 0; color: #6c808b; font-size: 13px; }

.command-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.9fr);
  overflow: hidden;
  margin-bottom: 12px;
  border: 1px solid #dfe9eb;
  border-radius: 15px;
  background: #fff;
  box-shadow: 0 3px 12px rgba(41, 65, 77, 0.035);
  scroll-margin-top: 90px;
}
.command-info { padding: 19px 21px; }
.command-info h3 { margin: 0 0 8px; font-size: 15px; line-height: 1.5; }
.command-info h3 code { color: #126d69; overflow-wrap: anywhere; }
.command-info p { margin: 0; color: #5b707d; font-size: 13px; }
.command-info .command-note { margin-top: 8px; color: #5f707a; font-size: 11px; }
.command-info .warning { padding: 8px 10px; border-radius: 8px; background: #fff7e8; color: #886421; }
.command-example { display: flex; flex-direction: column; min-width: 0; padding: 14px 16px; border-left: 1px solid #e3edef; background: #f5f9fa; }
.example-label { margin-bottom: 8px; color: #60727d; font-size: 10px; font-weight: 700; letter-spacing: 0.3px; }
pre {
  overflow: auto;
  margin: 0;
  padding: 12px 14px;
  border: 1px solid #263d53;
  border-radius: 10px;
  background: var(--code);
  color: #dfedf4;
  tab-size: 2;
  font: 12px/1.75 "Cascadia Code", Consolas, "Microsoft YaHei", monospace;
}
pre:focus-visible { outline: 3px solid rgba(15, 159, 145, 0.4); outline-offset: 2px; }
code { font-family: "Cascadia Code", Consolas, "Microsoft YaHei", monospace; }
p code, dd code { padding: 1px 4px; border-radius: 4px; background: #eaf3f3; color: #166c68; font-size: 0.94em; }
pre code { padding: 0; background: none; color: inherit; font-size: inherit; }

.sensor-key { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; margin-bottom: 14px; }
.sensor-key span { padding: 10px 12px; border: 1px solid #dce9e8; border-radius: 10px; background: #f1f9f7; color: #5c707a; font-size: 11px; }
.sensor-key b { display: block; color: #29756e; font-size: 12px; }

.reference-block, .mission-card { margin-top: 16px; padding: 22px; border: 1px solid #dfe9eb; border-radius: 15px; background: #fff; }
.reference-block h3, .mission-card h3 { margin: 0 0 9px; color: #244b5b; font-size: 17px; }
.reference-block > p, .mission-card > p:not(.eyebrow) { color: #5b707d; font-size: 13px; }
.operator-list { margin: 18px 0; }
.operator-list > div { display: grid; grid-template-columns: 58px 1fr; gap: 12px; padding: 10px 0; border-bottom: 1px solid #edf2f3; }
.operator-list dt { color: #365867; font-weight: 700; }
.operator-list dd { margin: 0; color: #647985; font-size: 13px; }
.reference-block .command-note { color: #5f707a; font-size: 12px; }
.reference-block pre { margin-top: 14px; }
.mission-card { border-color: #d7d0fa; background: linear-gradient(135deg, #fff, #f5f3ff); }

/* 操作台与观察技巧（第 07 章）：快捷键速查网格 */
.shortcut-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(215px, 1fr)); gap: 9px; margin: 14px 0 4px; }
.shortcut-list span { display: flex; align-items: center; gap: 8px; padding: 9px 12px; border: 1px solid #dce9e8; border-radius: 10px; background: #f1f9f7; color: #5c707a; font-size: 12px; }
.mission-card .eyebrow { color: var(--purple); }
.mission-link { display: inline-flex; align-items: center; gap: 7px; margin-top: 18px; color: var(--accent-dark); font-weight: 700; text-decoration: none; }
.mission-link:hover { text-decoration: underline; }
.manual-footer { padding: 22px; border-top: 1px solid #dfe9eb; color: #60727d; text-align: center; font-size: 12px; }

@media (max-width: 960px) {
  .manual-layout { grid-template-columns: 180px minmax(0, 1fr); gap: 22px; }
  .command-card { grid-template-columns: 1fr; }
  .command-example { border-top: 1px solid #e3edef; border-left: 0; }
}

@media (max-width: 700px) {
  .manual-topbar { min-height: 60px; padding: 8px 12px; }
  .manual-topbar .brand { min-width: 0; width: auto; margin: 0; }
  .manual-topbar .brand small { display: none; }
  .manual-topbar .brand-mark { width: 34px; height: 34px; }
  .manual-back { padding: 6px 10px; font-size: 12px; }
  .manual-hero-inner { padding: 32px 18px 28px; }
  .manual-lead { font-size: 14px; }
  .quick-rules { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
  .manual-layout { display: block; padding: 24px 14px 44px; }
  .manual-sidebar { position: static; margin-bottom: 30px; }
  .manual-sidebar ol { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
  .manual-sidebar li + li { margin-top: 0; }
  .toc-tip { display: none; }
  .manual-section + .manual-section { margin-top: 44px; }
  .section-heading { gap: 11px; }
  .section-heading h2 { font-size: 21px; }
  .section-heading .section-number { width: 38px; height: 38px; }
  .command-info { padding: 16px; }
  .command-example { padding: 12px; }
  .sensor-key { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
  .manual-back, .manual-sidebar li a { transition: background-color 160ms ease, border-color 160ms ease; }
}