.tools-page {
  padding-top: 72px;
}

.tools-masthead {
  display: grid;
  min-height: 660px;
  grid-template-columns: minmax(0, 1.08fr) minmax(390px, 0.92fr);
  align-items: center;
  gap: 56px;
  padding: 76px 0 58px;
}

.tools-intro h1 {
  max-width: 760px;
  margin: 0;
  font-size: 70px;
  font-weight: 950;
  line-height: 0.96;
  letter-spacing: 0;
}

.tools-intro h1 span {
  display: block;
  color: #dfe3e8;
}

.tools-lede {
  max-width: 720px;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.72;
}

.review-basis {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  max-width: 700px;
  margin-top: 28px;
  border: 1px solid var(--line);
  background: var(--line);
}

.review-basis span {
  min-width: 0;
  padding: 12px 14px;
  background: rgba(8, 9, 12, 0.98);
  color: var(--dim);
  font: 750 10px/1.45 var(--mono);
}

.review-basis b {
  margin-right: 8px;
  color: var(--gold);
}

.knowledge-stack {
  border: 1px solid var(--line-strong);
  background: rgba(13, 15, 19, 0.97);
  box-shadow: 12px 12px 0 rgba(128, 185, 238, 0.08);
}

.stack-head,
.stack-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 15px 17px;
  color: var(--dim);
  font: 800 9px/1.4 var(--mono);
}

.stack-head {
  border-bottom: 1px solid var(--line);
}

.stack-head > span:first-child {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--acid);
}

.stack-head .pulse {
  width: 6px;
  height: 6px;
  flex-basis: 6px;
}

.stack-layer {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) auto;
  align-items: center;
  gap: 15px;
  min-height: 116px;
  padding: 18px;
  border-bottom: 1px solid var(--line);
}

.stack-layer.is-source {
  background: rgba(184, 255, 90, 0.055);
}

.stack-number {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--line);
  color: var(--acid);
  font: 900 10px/1 var(--mono);
}

.stack-layer small,
.stack-layer strong,
.stack-layer p {
  display: block;
}

.stack-layer small {
  color: var(--gold);
  font: 800 9px/1.3 var(--mono);
}

.stack-layer strong {
  margin-top: 7px;
  font-size: 15px;
}

.stack-layer p {
  margin: 7px 0 0;
  color: var(--dim);
  font: 700 10px/1.5 var(--mono);
}

.stack-layer em {
  color: var(--dim);
  font: normal 800 9px/1 var(--mono);
}

.stack-foot {
  justify-content: flex-start;
  line-height: 1.55;
}

.selection-disclosure {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  align-items: center;
  gap: 24px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  background: rgba(243, 198, 95, 0.055);
}

.selection-disclosure b {
  color: var(--gold);
  font: 900 10px/1 var(--mono);
}

.selection-disclosure p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.scenario-tabs {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.scenario-tabs button {
  display: flex;
  min-width: 0;
  min-height: 58px;
  align-items: center;
  gap: 9px;
  padding: 0 13px;
  border: 0;
  background: var(--paper);
  color: var(--muted);
  font-size: 12px;
  font-weight: 850;
  cursor: pointer;
  text-align: left;
}

.scenario-tabs button:hover {
  background: var(--panel);
  color: var(--ink);
}

.scenario-tabs button[aria-pressed="true"] {
  background: var(--acid-soft);
  color: var(--acid);
}

.scenario-tabs button span {
  color: var(--dim);
  font: 800 9px/1 var(--mono);
}

.decision-console {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(360px, 0.82fr);
  border: 1px solid var(--line);
  border-top: 0;
  background: var(--line);
  gap: 1px;
}

.decision-output,
.decision-criteria {
  min-width: 0;
  padding: 34px;
  background: rgba(8, 9, 12, 0.98);
}

.decision-code {
  color: var(--gold);
  font: 850 10px/1 var(--mono);
}

.decision-output h3 {
  margin: 24px 0 12px;
  font-size: 36px;
  line-height: 1.05;
}

.decision-output > p {
  max-width: 740px;
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.72;
}

.decision-stack {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 30px;
  border: 1px solid var(--line);
  background: var(--line);
}

.decision-stack div {
  min-width: 0;
  min-height: 112px;
  padding: 18px;
  background: rgba(13, 15, 19, 0.98);
}

.decision-stack span,
.decision-stack strong {
  display: block;
}

.decision-stack span {
  color: var(--dim);
  font: 800 9px/1 var(--mono);
}

.decision-stack strong {
  margin-top: 28px;
  overflow-wrap: anywhere;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.4;
}

.decision-risk {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 20px;
  margin-top: 22px;
  padding: 17px 18px;
  border: 1px solid rgba(255, 118, 95, 0.35);
  background: rgba(255, 118, 95, 0.055);
}

.decision-risk small {
  color: var(--ember);
  font: 850 9px/1.4 var(--mono);
}

.decision-risk p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.65;
}

.decision-criteria {
  background: rgba(13, 15, 19, 0.98);
}

.decision-criteria h3 {
  margin: 12px 0 24px;
  font-size: 22px;
}

.decision-criteria ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.decision-criteria li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.decision-criteria li > span {
  color: var(--acid);
  font: 850 9px/1.4 var(--mono);
}

.decision-criteria strong {
  display: block;
  font-size: 13px;
}

.decision-criteria p {
  margin: 5px 0 0;
  color: var(--dim);
  font-size: 11px;
  line-height: 1.55;
}

.tool-group {
  display: grid;
  grid-template-columns: minmax(250px, 0.32fr) minmax(0, 1fr);
  border-top: 1px solid var(--line-strong);
}

.tool-group:last-child {
  border-bottom: 1px solid var(--line-strong);
}

.tool-group-head {
  padding: 28px 28px 28px 0;
}

.tool-group-head > span {
  color: var(--gold);
  font: 850 9px/1 var(--mono);
}

.tool-group-head h3 {
  margin: 18px 0 12px;
  font-size: 24px;
  line-height: 1.15;
}

.tool-group-head p {
  margin: 0;
  color: var(--dim);
  font-size: 12px;
  line-height: 1.65;
}

.tool-list {
  border-left: 1px solid var(--line);
}

.tool-row {
  display: grid;
  grid-template-columns: minmax(155px, 0.78fr) minmax(150px, 0.78fr) minmax(210px, 1.1fr) minmax(210px, 1.1fr) 42px;
  align-items: stretch;
  border-bottom: 1px solid var(--line);
  background: rgba(8, 9, 12, 0.52);
  transition: background-color 160ms ease, box-shadow 160ms ease;
}

.tool-row:last-child {
  border-bottom: 0;
}

.tool-row.is-match {
  background: rgba(184, 255, 90, 0.055);
  box-shadow: inset 3px 0 0 var(--acid);
}

.tool-row > div,
.tool-row > p,
.tool-row > a {
  min-width: 0;
  margin: 0;
  padding: 20px 18px;
  border-right: 1px solid var(--line);
}

.tool-identity h4 {
  margin: 11px 0 5px;
  font-size: 17px;
  line-height: 1.2;
}

.tool-identity small {
  color: var(--dim);
  font-size: 10px;
  line-height: 1.5;
}

.tool-code {
  color: var(--gold);
  font: 800 8px/1 var(--mono);
}

.tool-fit,
.tool-strength,
.tool-boundary {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.65;
}

.tool-fit {
  color: var(--ink);
  font-weight: 800;
}

.tool-boundary {
  color: var(--dim);
}

.tool-link {
  display: grid;
  place-items: center;
  border-right: 0 !important;
  color: var(--acid);
  font: 900 15px/1 var(--mono);
  text-decoration: none;
}

.tool-link:hover {
  background: var(--acid-soft);
}

.reference-stacks {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.reference-stack {
  min-width: 0;
  padding: 28px;
  background: rgba(8, 9, 12, 0.98);
}

.reference-stack > span {
  color: var(--gold);
  font: 850 9px/1 var(--mono);
}

.reference-stack h3 {
  margin: 28px 0 20px;
  font-size: 23px;
}

.reference-stack > div {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(120px, 0.6fr);
  align-items: center;
  gap: 16px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.reference-stack b {
  font-size: 13px;
}

.reference-stack small {
  color: var(--dim);
  font-size: 10px;
  text-align: right;
}

.reference-stack > p {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.65;
}

.tutorial-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.tutorial-card {
  display: flex;
  min-width: 0;
  min-height: 330px;
  flex-direction: column;
  padding: 26px;
  background: rgba(8, 9, 12, 0.98);
}

.tutorial-card:hover {
  background: rgba(184, 255, 90, 0.045);
}

.tutorial-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.tutorial-number {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--line-strong);
  color: var(--acid);
  font: 900 11px/1 var(--mono);
}

.tutorial-type {
  color: var(--gold);
  font: 850 9px/1.35 var(--mono);
  text-align: right;
}

.tutorial-card h3 {
  margin: 32px 0 12px;
  font-size: 23px;
  line-height: 1.18;
}

.tutorial-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.tutorial-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
  padding-top: 24px;
}

.tutorial-meta span {
  padding: 7px 9px;
  border: 1px solid var(--line);
  color: var(--dim);
  font: 750 9px/1.2 var(--mono);
}

.tutorial-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 16px;
  padding-top: 15px;
  border-top: 1px solid var(--line);
  color: var(--acid);
  font-size: 12px;
  font-weight: 900;
  text-decoration: none;
}

.tutorial-link span {
  font: 900 16px/1 var(--mono);
}

.tutorial-link:hover {
  color: var(--ink);
}

.tutorial-footnote {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: 14px;
  color: var(--dim);
}

.tutorial-footnote .pulse {
  flex: 0 0 6px;
  margin-top: 7px;
}

.tutorial-footnote p {
  margin: 0;
  font: 700 10px/1.6 var(--mono);
}

.tools-cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

@media (max-width: 1080px) {
  .tools-masthead {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 100px;
  }

  .knowledge-stack {
    max-width: 760px;
  }

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

  .decision-console {
    grid-template-columns: 1fr;
  }

  .tool-group {
    grid-template-columns: 1fr;
  }

  .tool-group-head {
    max-width: 760px;
    padding-right: 0;
  }

  .tool-list {
    border-left: 0;
    border-top: 1px solid var(--line);
  }
}

@media (max-width: 820px) {
  .tools-intro h1 {
    font-size: 54px;
  }

  .tool-row {
    grid-template-columns: minmax(150px, 0.7fr) minmax(0, 1fr) 42px;
  }

  .tool-row > div,
  .tool-row > p,
  .tool-row > a {
    border-bottom: 1px solid var(--line);
  }

  .tool-fit {
    border-right: 0 !important;
  }

  .tool-strength,
  .tool-boundary {
    grid-column: span 1;
  }

  .tool-link {
    grid-column: 3;
    grid-row: 1 / span 2;
    border-bottom: 0 !important;
  }

  .reference-stacks {
    grid-template-columns: 1fr;
  }

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

  .tools-cta-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 620px) {
  .tools-masthead {
    gap: 40px;
    padding-top: 78px;
  }

  .tools-intro h1 {
    font-size: 43px;
  }

  .tools-lede {
    font-size: 15px;
  }

  .review-basis,
  .scenario-tabs,
  .decision-stack {
    grid-template-columns: 1fr 1fr;
  }

  .stack-layer {
    grid-template-columns: 42px minmax(0, 1fr);
  }

  .stack-layer em {
    display: none;
  }

  .selection-disclosure,
  .decision-risk {
    grid-template-columns: 1fr;
    gap: 9px;
  }

  .decision-output,
  .decision-criteria {
    padding: 24px 20px;
  }

  .decision-output h3 {
    font-size: 30px;
  }

  .decision-stack div {
    min-height: 100px;
    padding: 15px;
  }

  .tool-row {
    grid-template-columns: minmax(0, 1fr) 42px;
  }

  .tool-row > div,
  .tool-row > p {
    grid-column: 1;
    border-right: 1px solid var(--line);
  }

  .tool-link {
    grid-column: 2;
    grid-row: 1 / span 4;
  }

  .reference-stack {
    padding: 24px 20px;
  }

  .tutorial-card {
    min-height: 0;
    padding: 24px 20px;
  }

  .tools-cta-actions,
  .tools-cta-actions .button,
  .tools-cta-actions .cta-wechat {
    width: 100%;
  }
}

@media (max-width: 420px) {
  .review-basis,
  .scenario-tabs,
  .decision-stack {
    grid-template-columns: 1fr;
  }

  .scenario-tabs button {
    min-height: 52px;
  }
}