:root {
  --ink: #10221d;
  --muted: #60706a;
  --paper: #f6f5ef;
  --white: #fffef9;
  --line: #cfd7d1;
  --accent: #b8f24a;
  --accent-dark: #243d17;
  --teal: #0c766a;
}

* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
}
a {
  color: inherit;
  text-decoration: none;
}
button,
input {
  font: inherit;
}
::selection {
  background: var(--accent);
  color: var(--ink);
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.shell {
  width: min(1180px, calc(100% - 48px));
  margin-inline: auto;
}
.site-header {
  height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  letter-spacing: 0.01em;
}
.brand b {
  font-weight: 600;
  margin-left: 5px;
}
.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: var(--accent);
  font: 800 18px/1 Arial;
  border-radius: 50%;
}
.header-meta {
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.hero {
  padding: 68px 0 56px;
  position: relative;
}
.hero::after {
  content: "Work\A Buddy";
  position: absolute;
  right: -10px;
  top: 58px;
  z-index: -1;
  font: 900 clamp(54px, 10vw, 118px) / 0.85 Arial;
  letter-spacing: -0.08em;
  white-space: pre;
  text-align: right;
  color: transparent;
  -webkit-text-stroke: 1px #dce1dc;
}
.hero-kicker,
.section-index {
  color: var(--teal);
  font: 700 13px/1.2 Arial;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.hero h1 {
  margin: 16px 0 22px;
  max-width: 900px;
  font-size: clamp(44px, 6.3vw, 82px);
  line-height: 1.08;
  letter-spacing: -0.055em;
  font-weight: 680;
}
.hero-lead {
  max-width: 720px;
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 26px;
}
.primary-action {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  padding: 15px 20px;
  background: var(--ink);
  color: white;
  font-weight: 650;
  font-size: 14px;
  transition:
    transform 0.2s ease,
    background 0.2s ease;
}
.primary-action span {
  color: var(--accent);
  font-size: 18px;
}
.primary-action:hover {
  transform: translateY(-2px);
  background: var(--teal);
}
.secondary-action {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  padding: 14px 19px;
  border: 1px solid var(--ink);
  color: var(--ink);
  font-weight: 650;
  font-size: 14px;
  transition:
    transform 0.2s ease,
    background 0.2s ease,
    color 0.2s ease;
}
.secondary-action span {
  color: var(--teal);
  font-size: 18px;
}
.secondary-action:hover {
  transform: translateY(-2px);
  background: var(--ink);
  color: white;
}
.secondary-action:hover span {
  color: var(--accent);
}
.primary-action:focus-visible,
.secondary-action:focus-visible,
.function-row:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}
.function-section {
  padding: 74px 0 100px;
  border-top: 1px solid var(--line);
}
.function-intro {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 40px;
  margin-bottom: 44px;
}
.function-intro h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
  letter-spacing: -0.04em;
  font-weight: 650;
}
.function-list {
  border-top: 2px solid var(--ink);
}
.function-row {
  display: grid;
  grid-template-columns: 80px 240px minmax(260px, 1fr) 90px 30px;
  gap: 20px;
  align-items: center;
  min-height: 116px;
  border-bottom: 1px solid var(--line);
  transition: background 0.2s ease;
}
a.function-row:hover {
  background: var(--white);
}
.function-code {
  color: var(--teal);
  font: 700 13px Arial;
}
.function-name {
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.function-name strong {
  font-size: 25px;
  letter-spacing: -0.03em;
}
.function-name small {
  color: var(--muted);
  font: 13px Arial;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.function-summary {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}
.function-status {
  justify-self: start;
  color: #8a9691;
  font-size: 13px;
}
.function-status.is-live {
  background: var(--accent);
  color: var(--accent-dark);
  padding: 6px 9px;
  font-weight: 700;
}
.function-arrow {
  justify-self: end;
  font-size: 22px;
}
.function-row.is-disabled {
  opacity: 0.62;
}
.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 30px 0 38px;
  border-top: 1px solid var(--ink);
  color: var(--muted);
  font-size: 13px;
}

/* System category pages */
.system-hero {
  padding: 58px 0 70px;
}
.system-title-row {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  align-items: end;
  gap: 72px;
}
.system-title-row h1 {
  margin: 0;
  font-size: clamp(48px, 7vw, 86px);
  line-height: 1;
  letter-spacing: -0.06em;
  font-weight: 680;
}
.system-title-row > p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.9;
}
.system-content {
  padding: 0 0 110px;
}
.system-section-label {
  color: var(--teal);
  font: 700 13px/1.2 Arial;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.system-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 18px;
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--line);
}
.system-feature {
  min-height: 132px;
  padding: 22px 24px 20px 0;
  border-right: 1px solid var(--line);
}
.system-feature + .system-feature {
  padding-left: 24px;
}
.system-feature:last-child {
  border-right: 0;
}
.system-feature span {
  color: var(--teal);
  font: 700 13px Arial;
}
.system-feature h3 {
  margin: 32px 0 0;
  font-size: 18px;
  letter-spacing: -0.02em;
}
.system-products-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 40px;
  margin: 92px 0 32px;
}
.system-products-heading h2 {
  margin: 14px 0 0;
  font-size: clamp(30px, 4vw, 48px);
  letter-spacing: -0.04em;
  font-weight: 650;
}
.system-products-heading p {
  max-width: 430px;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}
.system-products {
  border-top: 2px solid var(--ink);
}
.system-product-head,
.system-product-row {
  display: grid;
  grid-template-columns:
    minmax(170px, 0.8fr) minmax(130px, 0.55fr) minmax(130px, 0.55fr)
    minmax(280px, 1.45fr);
  gap: 24px;
}
.system-product-head {
  padding: 14px 18px 14px 0;
  color: var(--muted);
  border-bottom: 1px solid var(--ink);
  font-size: 13px;
}
.system-product-row {
  min-height: 74px;
  padding: 20px 18px 20px 0;
  align-items: center;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}
.system-product-row strong {
  color: var(--ink);
  font-size: 15px;
}
.connector-status {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 5px 8px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: var(--white);
  font-size: 12px;
  line-height: 1.25;
}
.connector-status.tone-supported {
  color: var(--teal);
  border-color: #9cc0bb;
  background: #eef6f4;
}
.connector-status.tone-partial {
  color: #745519;
  border-color: #d8c69c;
  background: #faf5e9;
}
.connector-status.tone-unsupported {
  color: #765b56;
  border-color: #d8c9c5;
  background: #f7f1ef;
}

/* HR explorer */
.back-link {
  color: var(--muted);
  font-size: 13px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 3px;
}
.back-link:hover {
  color: var(--teal);
  border-color: var(--teal);
}
.breadcrumb a {
  border-bottom: 1px solid var(--line);
}
.breadcrumb a:hover {
  color: var(--teal);
  border-color: var(--teal);
}
.hr-masthead {
  padding: 52px 0 54px;
}
.breadcrumb {
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 48px;
}
.hr-title-row {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
  align-items: end;
  gap: 72px;
}
.hr-label {
  color: var(--teal);
  font: 700 13px Arial;
  letter-spacing: 0.18em;
}
.hr-title-row h1 {
  margin: 14px 0 0;
  font-size: clamp(50px, 7.2vw, 88px);
  line-height: 0.98;
  letter-spacing: -0.06em;
  font-weight: 680;
}
.hr-title-row p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.9;
}
.hr-search {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr) auto;
  align-items: center;
  max-width: 920px;
  min-height: 66px;
  margin-top: 42px;
  border: 2px solid var(--ink);
  background: var(--white);
  box-shadow: 7px 7px 0 #d9dfd7;
}
.hr-search:focus-within {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}
.hr-search-icon {
  justify-self: center;
  color: var(--teal);
  font: 700 26px/1 Arial;
  transform: rotate(-18deg);
}
.hr-search input {
  width: 100%;
  min-width: 0;
  padding: 18px 8px;
  border: 0;
  outline: 0;
  color: var(--ink);
  background: transparent;
  font-size: 16px;
}
.hr-search input::placeholder {
  color: #89938f;
}
.hr-search button {
  align-self: stretch;
  min-width: 104px;
  padding: 0 22px;
  border: 0;
  cursor: pointer;
  background: var(--ink);
  color: white;
  font-weight: 700;
}
.hr-search button:hover {
  background: var(--teal);
}
.quick-searches {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  margin-top: 19px;
  color: var(--muted);
  font-size: 13px;
}
.quick-searches button {
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}
.quick-searches button:hover {
  border-color: var(--teal);
  color: var(--teal);
  background: var(--white);
}
.quick-searches button:focus-visible,
.hr-search button:focus-visible,
.scenario-card:focus-visible,
.directory-toggle:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.hr-scenarios {
  padding: 64px 0 72px;
  border-top: 1px solid var(--line);
}
.section-heading,
.explorer-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 48px;
  margin-bottom: 30px;
}
.section-heading > div > span,
.explorer-heading > div > span {
  color: var(--teal);
  font: 700 13px Arial;
  letter-spacing: 0.14em;
}
.section-heading h2,
.explorer-heading h2 {
  margin: 11px 0 0;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.04em;
  font-weight: 650;
}
.section-heading > p,
.explorer-heading p {
  max-width: 430px;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}
.explorer-heading p {
  margin-top: 12px;
}
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.scenario-card {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto auto 1fr;
  gap: 0 14px;
  min-height: 245px;
  padding: 21px 22px;
  text-align: left;
  cursor: pointer;
  border: 1px solid var(--line);
  background: rgba(255, 254, 249, 0.58);
  color: var(--ink);
  transition:
    transform 0.18s ease,
    border-color 0.18s ease,
    background 0.18s ease;
}
.scenario-card:hover {
  transform: translateY(-3px);
  border-color: var(--teal);
  background: var(--white);
}
.scenario-card.is-active {
  border-color: var(--ink);
  background: var(--ink);
  color: white;
}
.scenario-number {
  color: var(--teal);
  font: 700 13px Arial;
}
.scenario-card.is-active .scenario-number {
  color: var(--accent);
}
.scenario-count {
  justify-self: end;
  color: var(--muted);
  font-size: 12px;
}
.scenario-card.is-active .scenario-count,
.scenario-card.is-active .scenario-description {
  color: #c9d2cd;
}
.scenario-card > strong {
  grid-column: 1 / -1;
  margin-top: 29px;
  font-size: 24px;
  letter-spacing: -0.03em;
}
.scenario-description {
  grid-column: 1 / -1;
  margin-top: 11px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}
.scenario-examples {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-self: end;
  gap: 6px;
  margin-top: 22px;
}
.scenario-examples i {
  padding: 5px 7px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
  font-style: normal;
}
.scenario-card.is-active .scenario-examples i {
  color: #dbe3df;
  border-color: #53645d;
}
.scenario-arrow {
  position: absolute;
  right: 20px;
  bottom: 19px;
  color: var(--teal);
  font-size: 20px;
}
.scenario-card.is-active .scenario-arrow {
  color: var(--accent);
}

.hr-explorer {
  min-height: 250px;
  padding: 60px 0 110px;
  border-top: 1px solid var(--line);
  scroll-margin-top: 16px;
}
.directory-toggle {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 18px;
  padding: 14px 17px;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  font-size: 13px;
  font-weight: 700;
}
.directory-toggle:hover {
  background: var(--ink);
  color: white;
}
.directory-toggle span {
  color: var(--teal);
  font-size: 17px;
}
.directory-toggle:hover span {
  color: var(--accent);
}
.overview-table.is-hidden {
  display: none;
}
.overview-table {
  border-top: 2px solid var(--ink);
}
.overview-head,
.overview-row {
  display: grid;
  grid-template-columns: minmax(220px, 0.85fr) minmax(460px, 2fr) 90px;
  gap: 36px;
  align-items: center;
}
.overview-head {
  padding: 15px 18px 15px 0;
  color: var(--teal);
  border-bottom: 1px solid var(--ink);
  font-size: 13px;
  font-weight: 700;
}
.overview-head span:last-child {
  text-align: right;
}
.overview-group {
  border-bottom: 1px solid var(--line);
}
.overview-group.is-open {
  border-bottom-color: var(--ink);
}
.overview-row {
  width: 100%;
  min-height: 112px;
  padding: 20px 18px;
  align-items: center;
  border: 0;
  background: transparent;
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition: background 0.18s ease;
}
.overview-row:hover {
  background: var(--white);
}
.overview-row:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: -3px;
}
.overview-group.is-open .overview-row {
  background: var(--ink);
  color: white;
  padding-left: 18px;
}
.area-name {
  display: grid;
  grid-template-columns: 34px 1fr;
  align-items: center;
  gap: 10px;
}
.area-name small {
  color: var(--teal);
  font: 700 13px Arial;
}
.overview-group.is-open .area-name small {
  color: var(--accent);
}
.area-name strong {
  font-size: 18px;
  line-height: 1.45;
  letter-spacing: -0.02em;
}
.area-summary {
  margin: 0;
  padding-left: 1.25em;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}
.area-summary li + li {
  margin-top: 5px;
}
.overview-group.is-open .area-summary {
  color: #c9d2cd;
}
.expand-control {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
}
.expand-control i {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  margin-left: 5px;
  border: 1px solid var(--line);
  font: normal 18px Arial;
}
.overview-group.is-open .expand-control {
  color: #c9d2cd;
}
.overview-group.is-open .expand-control i {
  color: var(--accent);
  border-color: #53645d;
}

.detail-panel {
  background: var(--white);
  padding: 38px 42px 46px;
  border-left: 1px solid var(--ink);
  border-right: 1px solid var(--ink);
}
.detail-table {
  border-top: 1px solid var(--ink);
}
.detail-head,
.detail-row {
  display: grid;
  grid-template-columns:
    minmax(230px, 1.35fr) minmax(200px, 1.15fr) minmax(150px, 0.8fr)
    minmax(180px, 1fr);
  gap: 24px;
  align-items: center;
}
.detail-head {
  padding: 12px 0;
  color: var(--teal);
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  font-weight: 700;
}
.detail-row {
  padding: 18px 0;
  border-bottom: 1px solid #e4e8e4;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}
.detail-row > * {
  min-width: 0;
}
.detail-row:last-child {
  border-bottom: 0;
}
.detail-work {
  color: var(--ink);
  font-weight: 600;
}
.detail-work b {
  display: inline-block;
  width: 32px;
  color: var(--teal);
  font: 700 13px Arial;
}
.output-list {
  margin: 0;
  padding-left: 1.25em;
  overflow-wrap: anywhere;
}
.output-list li + li {
  margin-top: 4px;
}
.system-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}
.system-link {
  display: inline-block;
  padding: 5px 8px;
  border: 1px solid var(--line);
  color: var(--ink);
  background: var(--paper);
  font-size: 13px;
  line-height: 1.25;
  transition:
    background 0.18s ease,
    color 0.18s ease,
    border-color 0.18s ease;
}
.system-link:hover {
  color: var(--accent-dark);
  background: var(--accent);
  border-color: var(--accent);
}

.search-result-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.search-result-card {
  min-width: 0;
  padding: 22px 24px 24px;
  border: 1px solid var(--line);
  background: var(--white);
}
.search-result-meta {
  display: flex;
  gap: 10px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 700;
}
.search-result-meta span + span {
  padding-left: 10px;
  border-left: 1px solid var(--line);
}
.search-result-card h3 {
  margin: 18px 0 22px;
  font-size: 19px;
  line-height: 1.45;
  letter-spacing: -0.02em;
}
.search-result-detail {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 22px;
  padding-top: 17px;
  border-top: 1px solid #e4e8e4;
}
.search-result-detail small {
  display: block;
  margin-bottom: 9px;
  color: var(--muted);
  font-size: 12px;
}
.search-result-detail .output-list {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}
.search-result-systems {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.search-result-systems > .system-links {
  display: contents;
}
.search-empty {
  padding: 38px 28px;
  border: 1px solid var(--line);
  background: var(--white);
}
.search-empty strong {
  font-size: 20px;
}
.search-empty p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 1020px) {
  .overview-head {
    display: none;
  }
  .overview-row {
    grid-template-columns: minmax(180px, 1fr) minmax(240px, 1.3fr) 82px;
  }
  .detail-head,
  .detail-row {
    grid-template-columns:
      minmax(210px, 1.2fr) minmax(180px, 1fr) minmax(140px, 0.8fr)
      minmax(160px, 1fr);
  }
  .detail-panel {
    overflow-x: auto;
  }
  .detail-table {
    min-width: 820px;
  }
  .system-title-row {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .system-product-head {
    display: none;
  }
  .system-product-head,
  .system-product-row {
    grid-template-columns:
      minmax(150px, 0.75fr) minmax(120px, 0.55fr) minmax(120px, 0.55fr)
      minmax(230px, 1.35fr);
    gap: 18px;
  }
  .scenario-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .shell {
    width: min(100% - 32px, 680px);
  }
  .header-meta {
    display: none;
  }
  .hero {
    padding: 54px 0 44px;
  }
  .hero::after {
    top: 78px;
    font-size: 54px;
  }
  .hero h1 {
    font-size: clamp(42px, 12vw, 66px);
  }
  .function-intro {
    align-items: flex-start;
    flex-direction: column;
    gap: 18px;
  }
  .function-row {
    grid-template-columns: 42px 1fr auto;
    gap: 12px;
    padding-block: 22px;
  }
  .function-summary {
    grid-column: 2 / -1;
    grid-row: 2;
  }
  .function-status {
    grid-column: 2;
    grid-row: 3;
  }
  .function-arrow {
    grid-column: 3;
    grid-row: 1;
  }
  .site-footer {
    flex-direction: column;
  }
  .back-link {
    font-size: 13px;
  }
  .hr-masthead {
    padding: 44px 0 50px;
  }
  .breadcrumb {
    margin-bottom: 36px;
  }
  .hr-title-row {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .hr-title-row h1 {
    font-size: clamp(48px, 15vw, 72px);
  }
  .hr-search {
    grid-template-columns: 42px minmax(0, 1fr);
    min-height: 58px;
    margin-top: 34px;
    box-shadow: 5px 5px 0 #d9dfd7;
  }
  .hr-search input {
    padding: 15px 6px;
    font-size: 14px;
  }
  .hr-search button {
    grid-column: 1 / -1;
    min-height: 48px;
  }
  .quick-searches {
    gap: 7px;
  }
  .hr-scenarios {
    padding: 50px 0 58px;
  }
  .section-heading,
  .explorer-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
  }
  .scenario-grid {
    grid-template-columns: 1fr;
  }
  .scenario-card {
    min-height: 220px;
  }
  .hr-explorer {
    padding: 50px 0 80px;
  }
  .directory-toggle {
    width: 100%;
    justify-content: space-between;
  }
  .search-result-list {
    grid-template-columns: 1fr;
  }
  .search-result-detail {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .overview-row {
    grid-template-columns: 1fr auto;
    gap: 15px;
    padding: 22px 14px;
  }
  .overview-group.is-open .overview-row {
    padding-left: 14px;
  }
  .area-name {
    grid-column: 1;
  }
  .area-summary {
    grid-column: 1 / -1;
    grid-row: 2;
    padding-left: 44px;
  }
  .expand-control {
    grid-column: 2;
    grid-row: 1;
  }
  .detail-panel {
    padding: 28px 22px 34px;
  }
  .detail-table {
    min-width: 0;
  }
  .detail-head {
    display: none;
  }
  .detail-row {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 20px 0;
  }
  .detail-row span:not(.detail-work)::before {
    content: attr(data-label) "：";
    color: var(--ink);
    font-weight: 650;
  }
  .system-hero {
    padding: 44px 0 54px;
  }
  .system-title-row {
    gap: 24px;
  }
  .system-title-row h1 {
    font-size: clamp(48px, 15vw, 76px);
  }
  .system-content {
    padding-bottom: 80px;
  }
  .system-features {
    grid-template-columns: repeat(2, 1fr);
  }
  .system-feature:nth-child(2) {
    border-right: 0;
  }
  .system-feature:nth-child(3),
  .system-feature:nth-child(4) {
    border-top: 1px solid var(--line);
  }
  .system-feature:nth-child(3) {
    padding-left: 0;
  }
  .system-products-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
    margin-top: 66px;
  }
  .system-product-head {
    display: none;
  }
  .system-product-row {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 18px 0;
  }
  .system-page .connector-status {
    margin: 5px 0 7px;
  }
  .system-page .connector-status::before {
    content: attr(data-label) "：";
    color: var(--ink);
    font-weight: 650;
  }
  .system-page .product-position::before {
    content: attr(data-label) "：";
    display: block;
    margin-bottom: 4px;
    color: var(--ink);
    font-weight: 650;
  }
}

/* System pages stay in the same brand family, with a restrained catalog accent. */
.system-page {
  --system-accent: #1d7180;
  --system-soft: #eaf2f0;
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
}
.system-page .system-hero {
  position: relative;
  overflow: hidden;
  padding: 44px 0 48px;
  border-bottom: 1px solid var(--line);
}
.system-page .system-hero::after {
  content: "SYS";
  position: absolute;
  right: 0;
  top: 54px;
  z-index: 0;
  color: transparent;
  font: 900 clamp(92px, 15vw, 176px) / 0.8 Arial;
  letter-spacing: -0.08em;
  -webkit-text-stroke: 1px #d8e1dd;
}
.system-page .system-title-row {
  position: relative;
  z-index: 1;
}
.system-page .hr-label,
.system-page .system-section-label {
  color: var(--system-accent);
}
.system-page .system-title-row > p {
  color: var(--muted);
}
.system-page .system-content {
  padding: 46px 0 82px;
}
.system-page .system-features {
  gap: 12px;
  border: 0;
}
.system-page .system-feature,
.system-page .system-feature + .system-feature {
  min-height: 104px;
  padding: 16px 18px;
  border: 1px solid #d5e1dc;
  border-radius: 6px;
  background: var(--system-soft);
}
.system-page .system-feature span {
  color: var(--system-accent);
}
.system-page .system-feature h3 {
  margin-top: 18px;
  color: var(--ink);
}
.system-page .system-products-heading {
  margin: 52px 0 22px;
}
.system-page .system-products-heading h2 {
  color: var(--ink);
}
.system-page .system-products {
  border-top: 2px solid var(--ink);
}
.system-page .system-product-head {
  padding: 14px 18px 14px 0;
  color: var(--muted);
  border-bottom: 1px solid var(--ink);
}
.system-page .system-product-row {
  min-height: 72px;
  margin: 0;
  padding: 14px 18px 14px 0;
  align-items: center;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
}
.system-page .system-product-row strong {
  color: var(--system-accent);
}
.system-page .product-name {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.system-page .product-name img {
  width: 32px;
  height: 32px;
  flex: 0 0 32px;
  object-fit: contain;
}
.system-page .product-support {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 7px;
  min-width: 0;
}
.system-page .product-support small {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}
.system-page .product-position {
  min-width: 0;
}
.system-page .product-position ul {
  margin: 0;
  padding-left: 1.25em;
  line-height: 1.6;
  overflow-wrap: anywhere;
}
.system-page .product-position li + li {
  margin-top: 4px;
}
.system-page .vendor-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  width: fit-content;
  color: var(--ink);
  font-weight: 650;
  border-bottom: 1px solid #b9c7c2;
  transition:
    color 0.18s ease,
    border-color 0.18s ease;
}
.system-page .vendor-link span {
  color: var(--system-accent);
  font-size: 12px;
}
.system-page .vendor-link:hover {
  color: var(--system-accent);
  border-color: var(--system-accent);
}

/* Vendor integration pages */
.vendor-page {
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
}
.vendor-hero {
  position: relative;
  overflow: hidden;
  padding: 48px 0 58px;
  border-bottom: 1px solid var(--line);
}
.vendor-hero::after {
  content: "API";
  position: absolute;
  right: 0;
  top: 70px;
  z-index: 0;
  color: transparent;
  font: 900 clamp(90px, 15vw, 174px) / 0.8 Arial;
  letter-spacing: -0.08em;
  -webkit-text-stroke: 1px #d8e1dd;
}
.vendor-title-row {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
  align-items: end;
  gap: 64px;
}
.vendor-title-main {
  display: flex;
  align-items: center;
  gap: 24px;
  min-width: 0;
}
.vendor-logo {
  width: 72px;
  height: 72px;
  flex: 0 0 72px;
  padding: 8px;
  object-fit: contain;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--white);
}
.vendor-title-row h1 {
  margin: 11px 0 0;
  font-size: clamp(42px, 6.4vw, 78px);
  line-height: 1;
  letter-spacing: -0.055em;
  font-weight: 680;
}
.vendor-intro p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}
.vendor-intro small {
  display: block;
  margin-top: 16px;
  color: var(--teal);
  font-size: 13px;
}
.vendor-content {
  padding: 54px 0 94px;
}
.vendor-section-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 40px;
  margin-bottom: 24px;
}
.vendor-section-heading.compact {
  margin-bottom: 20px;
}
.vendor-section-heading h2 {
  margin: 10px 0 0;
  font-size: clamp(28px, 3.8vw, 44px);
  line-height: 1.05;
  letter-spacing: -0.04em;
  font-weight: 650;
}
.vendor-section-heading > p {
  max-width: 510px;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}
.vendor-channels {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}
.vendor-channel {
  min-height: 370px;
  padding: 21px 20px 23px;
  border: 1px solid var(--line);
  border-top: 3px solid #9ba7a3;
  background: var(--white);
}
.vendor-channel.tone-supported {
  border-top-color: var(--teal);
}
.vendor-channel.tone-partial {
  border-top-color: #a27b31;
}
.vendor-channel.tone-unsupported {
  border-top-color: #8b6a63;
}
.vendor-channel-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.vendor-channel-top > span {
  color: var(--teal);
  font: 700 13px Arial;
}
.vendor-channel-top small {
  padding: 4px 8px;
  color: #5d6965;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
}
.vendor-channel.tone-supported .vendor-channel-top small {
  color: var(--teal);
  border-color: #9cc0bb;
  background: #eef6f4;
}
.vendor-channel.tone-partial .vendor-channel-top small {
  color: #745519;
  border-color: #d8c69c;
  background: #faf5e9;
}
.vendor-channel.tone-unsupported .vendor-channel-top small {
  color: #765b56;
  border-color: #d8c9c5;
  background: #f7f1ef;
}
.vendor-channel h3 {
  margin: 24px 0 12px;
  font-size: 21px;
  letter-spacing: -0.025em;
}
.vendor-channel > strong {
  color: var(--teal);
  font-size: 16px;
}
.vendor-channel > p {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}
.vendor-channel ul {
  margin: 18px 0 0;
  padding-left: 1.2em;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}
.vendor-channel li + li {
  margin-top: 5px;
}
.vendor-depth-section,
.vendor-products-section,
.vendor-sources-section {
  margin-top: 70px;
}
.vendor-product-count {
  color: var(--teal);
  font-size: 14px;
}
.vendor-capability-layout {
  border-top: 2px solid var(--ink);
}
.vendor-capability-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.vendor-capability-card {
  min-height: 205px;
  padding: 24px 26px 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--white);
}
.vendor-capability-card:last-child {
  border-right: 0;
}
.vendor-capability-title {
  display: flex;
  align-items: center;
  gap: 13px;
  margin-bottom: 22px;
}
.vendor-capability-title span {
  color: var(--teal);
  font: 700 12px Arial;
}
.vendor-capability-title h3 {
  margin: 0;
  font-size: 20px;
  letter-spacing: -0.02em;
}
.vendor-capability-card p,
.vendor-capability-card ul {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.75;
}
.vendor-capability-card ul {
  padding-left: 1.25em;
}
.vendor-capability-card li + li {
  margin-top: 5px;
}
.vendor-capability-boundary {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr);
  gap: 24px;
  align-items: start;
  padding: 19px 24px;
  border-bottom: 1px solid #c9d7d1;
  background: #eaf2f0;
}
.vendor-capability-boundary strong {
  color: var(--teal);
  font-size: 13px;
}
.vendor-capability-boundary p,
.vendor-capability-boundary ul {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}
.vendor-capability-boundary ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  padding-left: 1.2em;
}
.vendor-products {
  border-top: 2px solid var(--ink);
}
.vendor-product-head,
.vendor-product-row {
  display: grid;
  grid-template-columns: minmax(170px, 1.1fr) minmax(145px, 0.85fr) repeat(4, minmax(100px, 0.58fr));
  gap: 18px;
  align-items: center;
}
.vendor-product-head {
  padding: 13px 18px 13px 0;
  color: var(--muted);
  border-bottom: 1px solid var(--ink);
  font-size: 13px;
}
.vendor-product-row {
  min-height: 76px;
  padding: 15px 18px 15px 0;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.55;
}
.vendor-product-row .product-name {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
}
.vendor-product-row .product-name img {
  width: 32px;
  height: 32px;
  flex: 0 0 32px;
  object-fit: contain;
}
.vendor-product-row a {
  width: fit-content;
  color: var(--teal);
  border-bottom: 1px solid #9cc0bb;
  font-weight: 650;
}
.vendor-product-row a:hover {
  color: var(--accent-dark);
  border-color: var(--accent-dark);
}
.vendor-source-count {
  color: var(--teal);
  font-size: 14px;
}
.vendor-products-note,
.vendor-sources-note {
  max-width: 860px;
  margin: -15px 0 24px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}
.vendor-sources {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 2px solid var(--ink);
}
.vendor-sources > a {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) 24px;
  align-items: center;
  gap: 14px;
  min-height: 104px;
  padding: 16px 18px 16px 0;
  border-bottom: 1px solid var(--line);
}
.vendor-sources > a:nth-child(odd) {
  border-right: 1px solid var(--line);
}
.vendor-sources > a:nth-child(even) {
  padding-left: 18px;
}
.vendor-sources > a:hover {
  background: var(--white);
}
.vendor-sources > a .vendor-source-index {
  color: var(--teal);
  font: 700 13px Arial;
}
.vendor-source-copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  align-items: flex-start;
  gap: 5px;
}
.vendor-source-copy small {
  padding: 2px 6px;
  color: var(--teal);
  background: #eaf2f0;
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 0.08em;
}
.vendor-source-copy strong {
  color: var(--ink);
  font-size: 14px;
  line-height: 1.45;
}
.vendor-source-copy em {
  overflow: hidden;
  max-width: 100%;
  color: var(--muted);
  font-size: 11px;
  font-style: normal;
  line-height: 1.4;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.vendor-sources > a i {
  color: var(--teal);
  font-style: normal;
}
.vendor-source-empty {
  margin: 0;
  padding: 20px 0;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}

/* System overview */
.systems-overview-page {
  min-height: 100vh;
}
.systems-overview-hero {
  position: relative;
  padding: 58px 0 54px;
}
.systems-overview-title-row {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
  align-items: end;
  gap: 72px;
}
.systems-overview-title-row h1 {
  margin: 0;
  font-size: clamp(54px, 8vw, 96px);
  line-height: 0.95;
  letter-spacing: -0.065em;
  font-weight: 680;
}
.systems-overview-title-row p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}
.systems-overview-total {
  display: flex;
  align-items: baseline;
  gap: 9px;
  margin-top: 34px;
  color: var(--teal);
}
.systems-overview-total strong {
  font: 700 28px/1 Arial;
}
.systems-overview-total span {
  font-size: 13px;
}
.systems-overview-content {
  padding-bottom: 100px;
}
.system-group {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 48px;
  padding: 46px 0;
  border-top: 1px solid var(--ink);
}
.system-group-heading > span {
  color: var(--teal);
  font: 700 13px Arial;
}
.system-group-heading h2 {
  margin: 12px 0 14px;
  font-size: 24px;
  line-height: 1.3;
  letter-spacing: -0.03em;
}
.system-group-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}
.system-group-heading small {
  display: block;
  margin-top: 20px;
  color: var(--teal);
  font-size: 13px;
}
.system-summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}
.system-summary-card {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 22px;
  align-items: center;
  gap: 12px;
  min-height: 104px;
  padding: 18px 20px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: background 0.18s ease;
}
.system-summary-card:nth-child(2n) {
  border-right: 0;
}
.system-summary-card:hover {
  background: var(--white);
}
.system-summary-card:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: -3px;
}
.system-summary-number {
  color: var(--teal);
  font: 700 13px Arial;
}
.system-summary-copy {
  display: flex;
  flex-direction: column;
  gap: 7px;
  min-width: 0;
}
.system-summary-copy strong {
  font-size: 16px;
  line-height: 1.35;
}
.system-summary-copy small {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}
.system-summary-arrow {
  justify-self: end;
  color: var(--teal);
  font-size: 17px;
}

@media (max-width: 1020px) {
  .vendor-channels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .system-page .system-hero {
    padding: 36px 0 42px;
  }
  .system-page .system-hero::after {
    top: 64px;
    font-size: 88px;
  }
  .system-page .system-content {
    padding: 42px 0 68px;
  }
  .system-page .system-feature,
  .system-page .system-feature + .system-feature {
    min-height: 96px;
    padding: 17px 16px;
    border-top: 1px solid #d5e1dc;
    border-radius: 5px;
  }
  .system-page .system-feature h3 {
    margin-top: 20px;
    font-size: 16px;
  }
  .system-page .system-products-heading {
    margin: 44px 0 18px;
  }
  .system-page .system-product-row {
    padding: 14px 0;
  }
  .system-page .vendor-link {
    margin-bottom: 5px;
  }
  .vendor-hero {
    padding: 38px 0 46px;
  }
  .vendor-hero::after {
    top: 92px;
    font-size: 84px;
  }
  .vendor-title-row {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .vendor-title-main {
    align-items: flex-start;
    gap: 16px;
  }
  .vendor-logo {
    width: 56px;
    height: 56px;
    flex-basis: 56px;
  }
  .vendor-title-row h1 {
    font-size: clamp(40px, 12vw, 64px);
  }
  .vendor-content {
    padding: 44px 0 72px;
  }
  .vendor-section-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }
  .vendor-section-heading.compact {
    align-items: flex-end;
    flex-direction: row;
  }
  .vendor-channels {
    grid-template-columns: 1fr;
  }
  .vendor-channel {
    min-height: 0;
  }
  .vendor-depth-section,
  .vendor-products-section,
  .vendor-sources-section {
    margin-top: 54px;
  }
  .vendor-capability-cards {
    grid-template-columns: 1fr;
  }
  .vendor-capability-card {
    min-height: 0;
    padding: 22px 18px 24px;
    border-right: 0;
  }
  .vendor-capability-boundary {
    grid-template-columns: 1fr;
    gap: 9px;
    padding: 18px;
  }
  .vendor-product-head {
    display: none;
  }
  .vendor-product-row {
    grid-template-columns: 1fr;
    gap: 7px;
    padding: 17px 0;
  }
  .vendor-product-row .connector-status::before {
    content: attr(data-label) "：";
    color: var(--ink);
    font-weight: 650;
  }
  .vendor-products-note,
  .vendor-sources-note {
    margin-top: -8px;
  }
  .vendor-sources {
    grid-template-columns: 1fr;
  }
  .vendor-sources > a:nth-child(odd) {
    border-right: 0;
  }
  .vendor-sources > a:nth-child(even) {
    padding-left: 0;
  }
  .systems-overview-hero {
    padding: 44px 0 46px;
  }
  .systems-overview-title-row {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .systems-overview-title-row h1 {
    font-size: clamp(54px, 18vw, 78px);
  }
  .systems-overview-total {
    margin-top: 26px;
  }
  .systems-overview-content {
    padding-bottom: 72px;
  }
  .system-group {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 36px 0;
  }
  .system-group-heading p {
    max-width: 480px;
  }
  .system-summary-grid {
    grid-template-columns: 1fr;
  }
  .system-summary-card,
  .system-summary-card:nth-child(2n) {
    min-height: 92px;
    padding: 16px 12px;
    border-right: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}