/* 第5套 web · 实验室规格单 / Lab spec sheet */
:root {
  --bg: #ffffff;
  --ink: #1b1f24;
  --mute: #5a6570;
  --line: #d5dce3;
  --cyan: #00c2d4;
  --cyan-deep: #0099a8;
  --panel: #f4fbfc;
  --focus: #007a86;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: auto;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Segoe UI", "Microsoft YaHei UI", "Microsoft YaHei", sans-serif;
  font-size: 16.5px;
  line-height: 1.8;
}

img,
svg {
  max-width: 100%;
  vertical-align: middle;
}

a {
  color: var(--cyan-deep);
}

a:hover {
  color: var(--focus);
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
}

.skip:focus {
  left: 12px;
  top: 12px;
  z-index: 20;
  background: var(--bg);
  border: 1px solid var(--cyan);
  color: var(--ink);
  padding: 6px 10px;
}

.topbar {
  height: 3px;
  background: var(--cyan);
}

.site-header {
  width: min(1040px, calc(100% - 40px));
  margin: 0 auto;
  padding: 18px 0 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand svg {
  width: 28px;
  height: 28px;
  color: var(--cyan);
}

.brand:hover {
  color: var(--cyan-deep);
}

.nav {
  display: flex;
  gap: 22px;
  font-family: Consolas, "Cascadia Mono", "Courier New", monospace;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}

.nav a {
  text-decoration: none;
  color: var(--mute);
  padding: 4px 0;
}

.nav a.is-on,
.nav a[aria-current="page"] {
  color: var(--cyan-deep);
  box-shadow: inset 0 -2px 0 var(--cyan);
}

.nav a:hover {
  color: var(--cyan-deep);
}

.doc-meta {
  width: min(1040px, calc(100% - 40px));
  margin: 12px auto 0;
  font-family: Consolas, "Cascadia Mono", "Courier New", monospace;
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--mute);
  text-transform: uppercase;
}

.sheet {
  width: min(920px, calc(100% - 40px));
  margin: 22px auto 48px;
}

.hero,
.block {
  margin: 0 0 2.4rem;
  padding: 0 0 2.2rem;
  border-bottom: 1px solid var(--line);
}

.hero {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 22px;
  align-items: start;
}

.hero-no,
.block-no {
  font-family: Consolas, "Cascadia Mono", "Courier New", monospace;
  color: var(--cyan);
  font-weight: 700;
  font-size: 2rem;
  line-height: 1;
  letter-spacing: 0.04em;
}

.label {
  margin: 0 0 0.55rem;
  font-family: Consolas, "Cascadia Mono", "Courier New", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan-deep);
}

h1,
h2,
h3 {
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
}

h1 {
  margin: 0 0 1rem;
  font-size: 1.95rem;
}

h2 {
  margin: 0 0 0.85rem;
  font-size: 1.32rem;
}

h3 {
  margin: 0 0 0.4rem;
  font-size: 1.02rem;
}

.hero p,
.block p {
  margin: 0 0 0.95rem;
}

.hero p:last-child,
.block p:last-child {
  margin-bottom: 0;
}

.lede {
  color: var(--ink);
}

.note {
  color: var(--mute);
  font-size: 0.95rem;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 1.15rem 0 0.2rem;
}

.btn,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.58rem 1.05rem;
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 700;
}

.btn {
  background: var(--cyan);
  color: #062326;
  border: 1px solid var(--cyan);
}

.btn:hover {
  background: var(--cyan-deep);
  border-color: var(--cyan-deep);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--cyan-deep);
  border: 1px solid var(--line);
}

.btn-ghost:hover {
  border-color: var(--cyan);
  color: var(--focus);
}

.btn svg,
.btn-ghost svg {
  width: 16px;
  height: 16px;
}

.table-wrap {
  margin: 0.9rem 0 0.3rem;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg);
  font-size: 0.94rem;
}

th,
td {
  border: 1px solid var(--line);
  padding: 0.58rem 0.72rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--panel);
  color: var(--cyan-deep);
  font-family: Consolas, "Cascadia Mono", "Courier New", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  font-weight: 700;
}

td:first-child {
  font-family: Consolas, "Cascadia Mono", "Courier New", monospace;
  font-size: 0.86rem;
  color: var(--ink);
  white-space: nowrap;
}

.spec-list {
  margin: 1rem 0 0.2rem;
  display: grid;
  gap: 10px;
}

.spec-row {
  display: grid;
  grid-template-columns: 72px 1fr;
  border: 1px solid var(--line);
  background: var(--bg);
}

.spec-id {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--panel);
  color: var(--cyan);
  font-family: Consolas, "Cascadia Mono", "Courier New", monospace;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  border-right: 1px solid var(--line);
}

.spec-body {
  padding: 0.85rem 1rem 0.8rem;
}

.spec-body h3 {
  font-family: Consolas, "Cascadia Mono", "Courier New", monospace;
  font-size: 0.88rem;
  letter-spacing: 0.04em;
  color: var(--cyan-deep);
}

.spec-body p {
  margin: 0;
  color: var(--ink);
  font-size: 0.95rem;
}

.cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 1rem 0 0.2rem;
}

.card {
  border: 1px solid var(--line);
  padding: 1.05rem 1.1rem 1rem;
  background: var(--bg);
}

.card .tag {
  margin: 0 0 0.45rem;
  font-family: Consolas, "Cascadia Mono", "Courier New", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
  text-transform: uppercase;
}

.card p {
  margin: 0 0 0.7rem;
}

.card p:last-child {
  margin-bottom: 0;
}

.faq article {
  display: grid;
  grid-template-columns: 72px 1fr;
  border: 1px solid var(--line);
  margin: 0 0 10px;
}

.faq article:last-child {
  margin-bottom: 0;
}

.faq .q-no {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 1rem;
  background: var(--panel);
  color: var(--cyan);
  font-family: Consolas, "Cascadia Mono", "Courier New", monospace;
  font-weight: 700;
  border-right: 1px solid var(--line);
}

.faq .q-body {
  padding: 0.9rem 1rem 0.85rem;
}

.faq h3 {
  font-size: 1rem;
}

.faq p {
  margin: 0;
  color: var(--mute);
}

.site-footer {
  width: min(920px, calc(100% - 40px));
  margin: 0 auto 40px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--mute);
  font-size: 0.88rem;
}

.site-footer p {
  margin: 0 0 0.45rem;
}

.site-footer .safe {
  color: var(--cyan-deep);
  font-family: Consolas, "Cascadia Mono", "Courier New", monospace;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
}

@media (max-width: 760px) {
  .site-header,
  .doc-meta,
  .sheet,
  .site-footer {
    width: calc(100% - 24px);
  }

  .hero,
  .faq article,
  .spec-row {
    grid-template-columns: 56px 1fr;
    gap: 12px;
  }

  .hero {
    display: grid;
  }

  .cards {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 1.42rem;
  }

  h2 {
    font-size: 1.16rem;
  }

  td:first-child {
    white-space: normal;
  }
}