.page-about {
  --about-rail: clamp(20px, 4vw, 38px);
  background: var(--ink-900);
  color: var(--white);
  overflow-x: clip;
  padding-bottom: clamp(40px, 6vw, 88px);
}

.page-about .breadcrumbs {
  padding-top: clamp(14px, 3vw, 26px);
}

/* ---------- 品牌封面 ---------- */
.page-about .about-cover {
  position: relative;
  padding: clamp(24px, 5vw, 52px) 0 clamp(32px, 6vw, 68px);
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(120% 90% at 50% -10%, rgba(53, 196, 160, 0.15), transparent 58%),
    radial-gradient(70% 60% at 94% 4%, rgba(240, 90, 60, 0.14), transparent 62%);
}

.page-about .about-cover::after {
  content: "JH-IX";
  position: absolute;
  right: -3%;
  top: 2%;
  font-family: var(--font-mono);
  font-size: clamp(60px, 15vw, 176px);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: rgba(94, 116, 138, 0.12);
  pointer-events: none;
  user-select: none;
  line-height: 1;
}

.page-about .about-cover__inner {
  position: relative;
  max-width: 880px;
  margin: 0 auto;
  text-align: center;
}

.page-about .about-cover h1 {
  font-size: clamp(30px, 5.2vw, 54px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  font-weight: 900;
  margin: 14px 0 0;
}

.page-about .about-cover .lede {
  margin: clamp(14px, 2.4vw, 22px) auto 0;
  max-width: 720px;
  color: var(--mist);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
}

.page-about .about-cover__figures {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(12px, 3vw, 34px);
  margin-top: clamp(22px, 4vw, 38px);
}

.page-about .about-figure {
  flex: 1 1 170px;
  max-width: 250px;
  padding: 14px 8px 0;
  border-top: 2px solid var(--line-strong);
}

.page-about .about-figure--brand {
  border-top-color: var(--brand);
}

.page-about .about-figure__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 34px);
  font-weight: 700;
  color: var(--white);
  line-height: 1.1;
  margin: 0;
}

.page-about .about-figure--brand .about-figure__num {
  color: var(--brand);
}

.page-about .about-figure__label {
  margin: 6px 0 0;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .about-cover__stage {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2.5vw, 22px);
  margin-top: clamp(26px, 4.5vw, 46px);
}

.page-about .about-cover__shot img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-cover__note {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: clamp(16px, 3vw, 26px);
  border-radius: var(--radius);
  border: 1px solid var(--line-soft);
  background: linear-gradient(165deg, var(--ink-800), rgba(11, 27, 43, 0.9));
  box-shadow: var(--shadow);
}

.page-about .about-cover__note .plate {
  align-self: flex-start;
}

.page-about .about-cover__note-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-cover__mark {
  margin: auto 0 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(169, 193, 214, 0.75);
  padding-top: 12px;
  border-top: 1px dashed var(--line-soft);
}

/* ---------- 区块标题 ---------- */
.page-about .about-head {
  max-width: 720px;
}

.page-about .about-head h2 {
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 10px 0 0;
}

.page-about .about-head .muted {
  margin: 12px 0 0;
  color: var(--mist);
  line-height: 1.8;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: clamp(22px, 4vw, 38px) 0 0;
  padding: 0 0 0 var(--about-rail);
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--mint) 0%, rgba(53, 196, 160, 0.3) 40%, rgba(94, 116, 138, 0.4) 100%);
}

.page-about .about-node {
  position: relative;
  padding-bottom: clamp(16px, 2.8vw, 26px);
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--about-rail));
  top: 10px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--mint);
  box-shadow: 0 0 0 4px rgba(53, 196, 160, 0.12);
}

.page-about .about-node__year {
  margin: 4px 0 8px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--mint-soft);
}

.page-about .about-node__body {
  padding: clamp(14px, 2.4vw, 22px);
  border-radius: var(--radius);
  border: 1px solid var(--line-soft);
  border-left: 3px solid rgba(53, 196, 160, 0.5);
  background: linear-gradient(160deg, var(--ink-800), rgba(18, 42, 64, 0.55));
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.page-about .about-node:hover .about-node__body {
  transform: translateY(-2px);
  border-color: var(--line-strong);
}

.page-about .about-node__body h3 {
  margin: 0;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.4;
}

.page-about .about-node__body p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 索引演进 ---------- */
.page-about .about-evolve {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3.4vw, 34px);
  margin-top: clamp(22px, 4vw, 38px);
}

.page-about .about-evolve__shot img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-copy {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--line-strong);
  background: rgba(18, 42, 64, 0.6);
}

.page-about .about-copy__code {
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--amber);
}

.page-about .about-evolve__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(12px, 2vw, 18px);
}

.page-about .about-evolve__item {
  position: relative;
  padding: clamp(14px, 2.4vw, 22px);
  border-radius: var(--radius);
  border: 1px solid var(--line-soft);
  background: var(--ink-800);
}

.page-about .about-evolve__num {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--brand);
}

.page-about .about-evolve__item h3 {
  margin: 8px 0 0;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.42;
}

.page-about .about-evolve__item p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 30px);
  margin-top: clamp(22px, 4vw, 38px);
}

.page-about .about-team__chart {
  padding: clamp(12px, 2vw, 20px);
  border-radius: var(--radius);
  border: 1px solid var(--line-soft);
  background: linear-gradient(150deg, rgba(23, 53, 83, 0.9), rgba(11, 27, 43, 0.9));
  overflow-x: auto;
}

.page-about .team-map {
  display: block;
  width: 100%;
  min-width: 460px;
  height: auto;
}

.page-about .tm-band {
  fill: rgba(53, 196, 160, 0.14);
  stroke: rgba(53, 196, 160, 0.5);
}

.page-about .tm-band-text {
  fill: var(--mint-soft);
  font-family: var(--font-mono);
  font-size: 16px;
  letter-spacing: 0.08em;
}

.page-about .tm-box {
  fill: var(--ink-750);
  stroke: rgba(94, 116, 138, 0.45);
}

.page-about .tm-box__title {
  fill: var(--white);
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 700;
}

.page-about .tm-box__sub {
  fill: var(--mist);
  font-family: var(--font-sans);
  font-size: 13px;
}

.page-about .tm-pill {
  fill: rgba(240, 90, 60, 0.16);
  stroke: var(--brand);
}

.page-about .tm-pill-text {
  fill: var(--white);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  text-anchor: middle;
}

.page-about .tm-arrow {
  stroke: rgba(94, 116, 138, 0.7);
  stroke-width: 2;
  fill: none;
}

.page-about .tm-foot {
  fill: var(--mist);
  font-family: var(--font-mono);
  font-size: 13px;
}

.page-about .about-team__notes {
  display: grid;
  gap: 12px;
}

.page-about .about-team__note {
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--brand);
  background: rgba(18, 42, 64, 0.72);
}

.page-about .about-team__note .plate {
  display: inline-block;
}

.page-about .about-team__note p:last-child {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2.4vw, 20px);
  margin-top: clamp(22px, 4vw, 38px);
}

.page-about .about-partner-card {
  padding: clamp(18px, 3vw, 26px);
  border-radius: var(--radius);
  border: 1px solid var(--line-soft);
  background: linear-gradient(170deg, var(--ink-800), rgba(11, 27, 43, 0.92));
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.page-about .about-partner-card:hover {
  transform: translateY(-2px);
  border-color: rgba(240, 90, 60, 0.55);
}

.page-about .about-partner-card__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(34px, 6vw, 52px);
  font-weight: 700;
  line-height: 1;
  color: var(--brand);
}

.page-about .about-partner-card h3 {
  margin: 8px 0 0;
  font-size: clamp(16px, 1.9vw, 19px);
  color: var(--white);
  letter-spacing: 0.02em;
}

.page-about .about-partner-card p:last-child {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-partners__path {
  margin-top: clamp(18px, 3vw, 28px);
  padding: clamp(16px, 3vw, 24px);
  border-radius: var(--radius);
  border: 1px solid rgba(53, 196, 160, 0.35);
  background: linear-gradient(120deg, rgba(53, 196, 160, 0.1), rgba(18, 42, 64, 0.85));
}

.page-about .about-partners__path p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-partners__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

/* ---------- 服务能力 ---------- */
.page-about .about-service {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(12px, 2vw, 18px);
  margin-top: clamp(22px, 4vw, 38px);
}

.page-about .about-service-card {
  padding: clamp(16px, 2.6vw, 24px);
  border-radius: var(--radius);
  border: 1px solid var(--line-soft);
  background: var(--ink-800);
  border-top: 3px solid rgba(94, 116, 138, 0.5);
  transition: border-top-color 0.25s ease, transform 0.25s ease;
}

.page-about .about-service-card:hover {
  border-top-color: var(--mint);
  transform: translateY(-2px);
}

.page-about .about-service-card__code {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--mint-soft);
}

.page-about .about-service-card h3 {
  margin: 8px 0 0;
  font-size: clamp(17px, 2vw, 20px);
}

.page-about .about-service-card p:last-child {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-honors {
  margin-top: clamp(24px, 4vw, 40px);
  padding-top: clamp(18px, 3vw, 28px);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-honors__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-honor {
  display: grid;
  gap: 8px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  background: rgba(18, 42, 64, 0.66);
  border: 1px solid var(--line-soft);
}

.page-about .about-honor .plate {
  justify-self: start;
}

.page-about .about-honor p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-next {
  margin-top: clamp(24px, 4vw, 40px);
  padding: clamp(18px, 3vw, 26px);
  border-radius: var(--radius);
  border: 1px solid rgba(240, 90, 60, 0.4);
  background: linear-gradient(130deg, rgba(240, 90, 60, 0.14), rgba(18, 42, 64, 0.9));
}

.page-about .about-next p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

.page-about .about-top-wrap {
  margin: clamp(22px, 3.4vw, 32px) 0 0;
  text-align: right;
}

.page-about .about-top {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 2px;
}

.page-about .about-top:hover {
  color: var(--white);
  border-bottom-color: var(--brand);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-service {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-honor {
    grid-template-columns: minmax(96px, auto) 1fr;
    align-items: center;
    gap: 14px;
  }
}

@media (min-width: 860px) {
  .page-about .about-cover__stage {
    grid-template-columns: minmax(0, 1.62fr) minmax(0, 0.9fr);
    align-items: stretch;
  }

  .page-about .about-evolve {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .about-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .about-service {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-honors__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-node {
    display: grid;
    grid-template-columns: 110px minmax(0, 1fr);
    gap: 16px;
    align-items: start;
  }

  .page-about .about-node__year {
    margin: 14px 0 0;
    text-align: right;
  }

  .page-about .about-timeline {
    padding-left: clamp(96px, 12vw, 132px);
  }

  .page-about .about-timeline::before {
    left: clamp(100px, 12.4vw, 136px);
  }

  .page-about .about-node::before {
    left: calc(clamp(96px, 12vw, 132px) * -1 + clamp(100px, 12.4vw, 136px) - 6px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node__body,
  .page-about .about-partner-card,
  .page-about .about-service-card {
    transition: none;
  }
}