/* Qianji Central Intelligence — integrated Zhongjin Times page */

.brain-main {
  background: var(--paper);
}

.brain-hero {
  min-height: min(800px, calc(100dvh - var(--header-height)));
  display: grid;
  align-content: end;
}

.brain-hero-media img {
  object-position: 55% center;
  filter: saturate(0.86) contrast(1.05);
}

.brain-hero-shade {
  background:
    linear-gradient(90deg, rgba(4, 21, 18, 0.97) 0%, rgba(5, 24, 20, 0.9) 36%, rgba(5, 24, 20, 0.43) 64%, rgba(4, 17, 15, 0.12) 100%),
    linear-gradient(0deg, rgba(4, 16, 14, 0.94) 0%, rgba(4, 16, 14, 0.12) 54%);
}

.brain-hero-inner {
  min-height: 650px;
  padding-block: clamp(76px, 8vw, 118px) 128px;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.46fr);
  align-items: center;
}

.brain-hero-copy {
  max-width: 800px;
}

.brain-hero-copy h1 {
  max-width: 790px;
  font-size: clamp(40px, 4.2vw, 58px);
  line-height: 1.2;
}

.brain-hero-copy .hero-lead {
  max-width: 730px;
  color: rgba(255, 255, 255, 0.78);
  font-size: clamp(14px, 1.08vw, 16px);
  line-height: 1.82;
}

.brain-hero-brief {
  background: rgba(7, 32, 27, 0.76);
}

.brain-hero-foot {
  position: absolute;
  inset: auto 0 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid rgba(255, 255, 255, 0.17);
  background: rgba(4, 20, 17, 0.72);
  backdrop-filter: blur(14px);
}

.brain-hero-foot > div {
  min-height: 94px;
  padding: 20px 28px;
  display: grid;
  grid-template-columns: auto 1fr;
  align-content: center;
  column-gap: 18px;
  border-right: 1px solid rgba(255, 255, 255, 0.13);
}

.brain-hero-foot > div:last-child {
  border-right: 0;
}

.brain-hero-foot span {
  grid-row: 1 / 3;
  align-self: center;
  color: var(--gold-light);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.brain-hero-foot strong {
  color: var(--white);
  font-size: 15px;
  font-weight: 650;
}

.brain-hero-foot small {
  color: rgba(255, 255, 255, 0.48);
  font-size: 11px;
  letter-spacing: 0.04em;
}

.brain-intro blockquote {
  max-width: 880px;
  margin: 38px 0 0;
  padding: 24px 0 0 34px;
  border-top: 1px solid var(--line);
  border-left: 2px solid var(--gold);
  color: var(--forest);
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  font-size: clamp(18px, 1.7vw, 23px);
  font-weight: 500;
  line-height: 1.75;
}

.brain-system .page-heading {
  margin-bottom: clamp(48px, 6vw, 84px);
}

.decision-sequence {
  border-top: 1px solid rgba(20, 32, 29, 0.2);
}

.decision-stage {
  min-height: 218px;
  padding: 34px 0;
  display: grid;
  grid-template-columns: minmax(140px, 0.35fr) minmax(210px, 0.62fr) minmax(280px, 1fr) minmax(240px, 0.78fr);
  align-items: start;
  gap: clamp(24px, 4vw, 64px);
  border-bottom: 1px solid rgba(20, 32, 29, 0.18);
}

.decision-stage > div {
  display: flex;
  align-items: baseline;
  gap: 18px;
}

.decision-stage > div span {
  color: var(--gold);
  font-family: "Songti SC", "STSong", serif;
  font-size: 30px;
}

.decision-stage > div small {
  color: #7c7569;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.17em;
}

.decision-stage h3 {
  margin: 2px 0 0;
  color: var(--forest);
  font-size: 21px;
  line-height: 1.5;
}

.decision-stage p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.9;
}

.decision-stage > strong {
  padding-left: 24px;
  border-left: 1px solid rgba(201, 164, 102, 0.58);
  color: var(--forest-mid);
  font-family: "Songti SC", "STSong", serif;
  font-size: 17px;
  font-weight: 500;
  line-height: 1.75;
}

.brain-capabilities {
  background:
    linear-gradient(115deg, rgba(255, 255, 255, 0.025), transparent 42%),
    var(--forest-deep);
}

.brain-capability-grid {
  margin-top: clamp(48px, 6vw, 82px);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid rgba(255, 255, 255, 0.17);
  border-left: 1px solid rgba(255, 255, 255, 0.12);
}

.brain-capability {
  min-height: 290px;
  padding: clamp(28px, 3vw, 42px);
  border-right: 1px solid rgba(255, 255, 255, 0.12);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  transition: background 280ms ease;
}

.brain-capability:hover {
  background: rgba(255, 255, 255, 0.045);
}

.brain-capability > span {
  color: var(--gold-light);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.18em;
}

.brain-capability h3 {
  margin: 70px 0 18px;
  color: var(--white);
  font-family: "Songti SC", "STSong", serif;
  font-size: 26px;
  font-weight: 500;
}

.brain-capability p {
  max-width: 340px;
  margin: 0;
  color: rgba(255, 255, 255, 0.59);
  font-size: 14px;
  line-height: 1.9;
}

.brain-capability:nth-child(4) {
  grid-column: 1 / 2;
}

.brain-scenarios {
  background: var(--paper);
}

.scenario-console {
  margin-top: clamp(46px, 6vw, 82px);
  border: 1px solid rgba(20, 32, 29, 0.18);
  background: var(--white);
  box-shadow: 0 34px 90px rgba(15, 35, 29, 0.08);
}

.scenario-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-bottom: 1px solid rgba(20, 32, 29, 0.16);
}

.brain-tab {
  min-height: 76px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 18px;
  color: #69736f;
  background: transparent;
  border-right: 1px solid rgba(20, 32, 29, 0.14);
  cursor: pointer;
  font-size: 14px;
  font-weight: 650;
  transition: color 220ms ease, background 220ms ease;
}

.brain-tab:last-child {
  border-right: 0;
}

.brain-tab span {
  color: #aaa398;
  font-size: 10px;
  letter-spacing: 0.12em;
}

.brain-tab:hover,
.brain-tab.is-active {
  color: var(--white);
  background: var(--forest);
}

.brain-tab.is-active span {
  color: var(--gold-light);
}

.scenario-panel {
  min-height: 520px;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(250px, 0.55fr) minmax(330px, 0.7fr);
}

.scenario-question,
.scenario-reasoning,
.decision-brief {
  padding: clamp(34px, 4vw, 58px);
}

.scenario-question {
  align-self: stretch;
}

.scenario-question > span,
.scenario-reasoning > p {
  color: var(--gold);
  font-size: 9px;
  font-weight: 750;
  letter-spacing: 0.18em;
}

.scenario-question h3 {
  max-width: 540px;
  margin: 74px 0 24px;
  color: var(--forest);
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(27px, 2.6vw, 36px);
  font-weight: 500;
  line-height: 1.32;
}

.scenario-question p {
  max-width: 580px;
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.84;
}

.scenario-reasoning {
  border-left: 1px solid rgba(20, 32, 29, 0.12);
}

.scenario-reasoning ol {
  margin: 76px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: brain-step;
}

.scenario-reasoning li {
  position: relative;
  min-height: 86px;
  padding: 0 0 22px 38px;
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.75;
  counter-increment: brain-step;
}

.scenario-reasoning li::before {
  position: absolute;
  top: 0;
  left: 0;
  content: "0" counter(brain-step);
  color: var(--forest);
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 0.12em;
}

.scenario-reasoning li:not(:last-child)::after {
  position: absolute;
  top: 25px;
  bottom: 5px;
  left: 8px;
  width: 1px;
  content: "";
  background: rgba(201, 164, 102, 0.4);
}

.decision-brief {
  margin: 22px;
  color: var(--white);
  background: var(--forest-deep);
}

.brief-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--gold-light);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.brief-head b {
  padding: 3px 7px;
  border: 1px solid rgba(226, 202, 155, 0.32);
  font-weight: 600;
}

.decision-brief h4 {
  margin: 36px 0 28px;
  font-family: "Songti SC", "STSong", serif;
  font-size: 25px;
  font-weight: 500;
}

.decision-brief dl {
  margin: 0;
}

.decision-brief dl div {
  padding: 15px 0;
  display: grid;
  grid-template-columns: 78px 1fr;
  gap: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.13);
}

.decision-brief dt {
  color: rgba(255, 255, 255, 0.42);
  font-size: 10px;
}

.decision-brief dd {
  margin: 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 11px;
  line-height: 1.7;
}

.decision-brief > p {
  margin: 28px 0 0;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.13);
  color: rgba(255, 255, 255, 0.52);
  font-family: "Songti SC", "STSong", serif;
  font-size: 14px;
  line-height: 1.8;
}

.brain-governance .visual-split {
  align-items: stretch;
}

.brain-governance-visual img {
  min-height: 100%;
  object-fit: cover;
}

.brain-principles strong {
  margin-bottom: 3px;
  display: block;
  color: var(--forest);
  font-size: 15px;
}

.brain-infrastructure {
  color: var(--white);
  background: var(--forest);
}

.brain-infrastructure-inner {
  min-height: 390px;
  padding-block: clamp(70px, 7vw, 104px);
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  align-items: end;
  gap: 36px clamp(40px, 8vw, 120px);
}

.brain-infrastructure h2 {
  max-width: 720px;
  margin: 20px 0 0;
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(32px, 3.4vw, 46px);
  font-weight: 500;
  line-height: 1.28;
}

.brain-infrastructure-inner > p {
  margin: 0;
  color: rgba(255, 255, 255, 0.62);
  font-size: 15px;
  line-height: 1.84;
}

.brain-infrastructure ul {
  grid-column: 1 / -1;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  list-style: none;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

.brain-infrastructure li {
  min-height: 72px;
  padding: 0 22px;
  display: grid;
  place-items: center start;
  border-right: 1px solid rgba(255, 255, 255, 0.14);
  color: var(--gold-light);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.08em;
}

.brain-infrastructure li:last-child {
  border-right: 0;
}

.brain-cta {
  background:
    linear-gradient(90deg, rgba(7, 28, 23, 0.97), rgba(13, 47, 39, 0.93)),
    var(--forest);
}

@media (max-width: 1120px) {
  .brain-hero-inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(280px, 0.5fr);
    gap: 42px;
  }

  .decision-stage {
    grid-template-columns: 120px 190px 1fr;
  }

  .decision-stage > strong {
    grid-column: 2 / -1;
  }

  .scenario-panel {
    grid-template-columns: 1fr 0.62fr;
  }

  .decision-brief {
    grid-column: 1 / -1;
    margin-top: 0;
  }
}

@media (max-width: 980px) {
  .brain-hero {
    min-height: 880px;
  }

  .brain-hero-inner {
    min-height: auto;
    padding-block: 72px 154px;
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .brain-hero-copy {
    max-width: 700px;
  }

  .brain-hero-brief {
    max-width: 560px;
  }

  .brain-hero-foot > div {
    padding-inline: 16px;
  }

  .decision-sequence {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    border-left: 1px solid rgba(20, 32, 29, 0.18);
  }

  .decision-stage {
    min-height: 360px;
    padding: 28px;
    display: block;
    border-right: 1px solid rgba(20, 32, 29, 0.18);
  }

  .decision-stage h3 {
    margin-top: 42px;
  }

  .decision-stage p {
    margin-top: 16px;
  }

  .decision-stage > strong {
    margin-top: 24px;
    padding: 16px 0 0;
    display: block;
    border-top: 1px solid rgba(201, 164, 102, 0.48);
    border-left: 0;
  }

  .brain-capability-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .brain-capability:nth-child(4) {
    grid-column: auto;
  }

  .scenario-tabs {
    grid-template-columns: repeat(2, 1fr);
  }

  .brain-tab:nth-child(2) {
    border-right: 0;
  }

  .brain-tab:nth-child(-n + 2) {
    border-bottom: 1px solid rgba(20, 32, 29, 0.14);
  }

  .scenario-panel {
    grid-template-columns: 1fr;
  }

  .scenario-reasoning {
    border-top: 1px solid rgba(20, 32, 29, 0.12);
    border-left: 0;
  }

  .scenario-reasoning ol,
  .scenario-question h3 {
    margin-top: 38px;
  }

  .decision-brief {
    grid-column: auto;
  }
}

@media (max-width: 700px) {
  .brain-hero {
    min-height: 940px;
  }

  .brain-hero-media img {
    object-position: 58% center;
  }

  .brain-hero-shade {
    background:
      linear-gradient(90deg, rgba(4, 21, 18, 0.95), rgba(4, 21, 18, 0.54)),
      linear-gradient(0deg, rgba(4, 16, 14, 0.98) 0%, rgba(4, 16, 14, 0.28) 72%);
  }

  .brain-hero-inner {
    padding-block: 66px 238px;
  }

  .brain-hero-copy h1 {
    font-size: clamp(33px, 9.4vw, 38px);
    line-height: 1.22;
  }

  .brain-hero-copy .hero-lead {
    font-size: 14px;
    line-height: 1.85;
  }

  .brain-hero-copy .hero-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .brain-hero-copy .button {
    min-width: 0;
    padding-inline: 14px;
  }

  .brain-hero-brief {
    padding: 22px;
  }

  .brain-hero-brief h2 {
    font-size: 20px;
  }

  .brain-hero-foot {
    grid-template-columns: repeat(2, 1fr);
  }

  .brain-hero-foot > div {
    min-height: 82px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }

  .brain-hero-foot > div:nth-child(2) {
    border-right: 0;
  }

  .brain-intro blockquote {
    padding-left: 22px;
    font-size: 18px;
  }

  .decision-sequence,
  .brain-capability-grid {
    grid-template-columns: 1fr;
  }

  .decision-stage {
    min-height: auto;
    padding: 28px 22px 32px;
  }

  .brain-capability {
    min-height: 240px;
    padding: 28px 24px;
  }

  .brain-capability h3 {
    margin-top: 54px;
  }

  .scenario-tabs {
    grid-template-columns: 1fr;
  }

  .brain-tab,
  .brain-tab:nth-child(2) {
    min-height: 62px;
    border-right: 0;
    border-bottom: 1px solid rgba(20, 32, 29, 0.14);
  }

  .scenario-question,
  .scenario-reasoning {
    padding: 32px 24px;
  }

  .scenario-question h3 {
    font-size: 27px;
  }

  .decision-brief {
    margin: 0 16px 16px;
    padding: 30px 24px;
  }

  .brain-infrastructure-inner {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .brain-infrastructure ul {
    grid-column: auto;
    grid-template-columns: repeat(2, 1fr);
  }

  .brain-infrastructure li:nth-child(2) {
    border-right: 0;
  }

  .brain-infrastructure li:nth-child(-n + 2) {
    border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  }
}

@media (prefers-reduced-motion: reduce) {
  .brain-capability,
  .brain-tab {
    transition: none;
  }
}