.page-about {
  --about-max: 1180px;
  --about-line: rgba(94, 127, 99, 0.28);
  --about-soft: rgba(242, 247, 244, 0.66);
  background: var(--ink);
  color: var(--snow);
  font-family: var(--font-body);
  line-height: 1.7;
}

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

.page-about a {
  color: inherit;
  text-decoration: none;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 4vw, 52px) var(--gutter) clamp(32px, 5vw, 64px);
  border-bottom: 1px solid var(--line-strong);
  background:
    repeating-linear-gradient(90deg, var(--about-line) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(0deg, var(--about-line) 0 1px, transparent 1px 88px),
    linear-gradient(154deg, var(--deep) 0%, var(--deep) 54%, var(--ink) 54%, var(--ink) 100%);
}

.page-about .about-hero__inner {
  max-width: var(--about-max);
  margin: 0 auto;
}

.page-about .about-hero__crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: clamp(18px, 3vw, 32px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--about-soft);
}

.page-about .about-hero__crumbs a {
  color: var(--mint);
  border-bottom: 1px solid transparent;
  transition: border-color var(--speed) var(--ease);
}

.page-about .about-hero__crumbs a:hover,
.page-about .about-hero__crumbs a:focus-visible {
  border-bottom-color: var(--mint);
}

.page-about .about-hero__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--mint);
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.3rem, 7.2vw, 5rem);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: 0.01em;
  color: var(--snow);
}

.page-about .about-hero__lede {
  max-width: 60ch;
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  font-size: 16px;
  color: rgba(242, 247, 244, 0.88);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 14px;
  margin: clamp(24px, 3.5vw, 40px) 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line-strong);
}

.page-about .about-hero__stats dt {
  margin-bottom: 4px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--about-soft);
}

.page-about .about-hero__stats dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3.8vw, 2.2rem);
  line-height: 1.1;
  color: var(--mint);
}

.page-about .about-hero__media {
  position: relative;
  max-width: var(--about-max);
  margin: clamp(26px, 4vw, 44px) auto 0;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: var(--deep);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  max-width: var(--about-max);
  margin: 0 auto;
  padding: clamp(38px, 6vw, 84px) var(--gutter);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-about .about-index__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--clay);
}

.page-about .about-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-index__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  font-size: 13px;
  color: rgba(242, 247, 244, 0.82);
  transition: color var(--speed) var(--ease), border-color var(--speed) var(--ease),
    background-color var(--speed) var(--ease);
}

.page-about .about-index__list a span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--moss);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--mint);
  border-color: var(--mint);
  background: rgba(57, 245, 200, 0.07);
}

.page-about .about-index__list a:hover span,
.page-about .about-index__list a:focus-visible span {
  color: var(--mint);
}

.page-about .about-sections {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(34px, 5vw, 64px);
  min-width: 0;
}

/* ---------- 章节头 ---------- */
.page-about .about-sec {
  padding-top: clamp(22px, 3vw, 34px);
  border-top: 1px solid var(--about-line);
  min-width: 0;
}

.page-about .about-sec p {
  max-width: 66ch;
}

.page-about .about-sec--narrow p {
  max-width: 60ch;
}

.page-about .sec-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  align-items: baseline;
  margin-bottom: clamp(16px, 2.4vw, 24px);
}

.page-about .sec-head__num {
  grid-row: span 2;
  padding-top: 0.6em;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--clay);
}

.page-about .sec-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 4.4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.14;
  color: var(--snow);
}

.page-about .sec-head__note {
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--about-soft);
}

.page-about .about-prose {
  margin: 0 0 14px;
  font-size: 16px;
  color: rgba(242, 247, 244, 0.9);
}

.page-about .about-prose--link {
  margin-top: 18px;
  padding-left: 14px;
  border-left: 2px solid var(--mint);
  font-size: 15px;
}

.page-about .about-prose--link a {
  color: var(--mint);
  border-bottom: 1px solid rgba(57, 245, 200, 0.45);
  transition: border-color var(--speed) var(--ease);
}

.page-about .about-prose--link a:hover,
.page-about .about-prose--link a:focus-visible {
  border-bottom-color: var(--mint);
}

.page-about .about-points {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-points li {
  position: relative;
  padding-left: 20px;
  color: rgba(242, 247, 244, 0.86);
  font-size: 15px;
}

.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 1px;
  background: var(--clay);
}

/* ---------- 技能树 ---------- */
.page-about .about-tree {
  margin: 20px 0 24px;
  padding: 10px 0 4px;
  overflow-x: auto;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-tree svg {
  display: block;
  width: 100%;
  min-width: 560px;
  height: auto;
}

.page-about .about-tree__nodes rect {
  fill: rgba(14, 42, 32, 0.92);
  stroke: rgba(94, 127, 99, 0.62);
  stroke-width: 1;
}

.page-about .about-tree__text text {
  font-family: var(--font-body);
  font-size: 15px;
  fill: var(--snow);
}

.page-about .about-tree__text .about-tree__sub {
  font-family: var(--font-mono);
  font-size: 11px;
  fill: var(--mint);
  letter-spacing: 0.04em;
}

.page-about .about-tree__steps text {
  font-family: var(--font-mono);
  font-size: 10px;
  fill: var(--clay);
  letter-spacing: 0.16em;
}

/* ---------- 团队卡片 ---------- */
.page-about .about-cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-card {
  position: relative;
  padding: 18px 18px 16px;
  border: 1px solid var(--line);
  background: var(--deep);
  transition: border-color var(--speed) var(--ease), background-color var(--speed) var(--ease);
}

.page-about .about-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 28px;
  height: 2px;
  background: var(--moss);
  transition: background-color var(--speed) var(--ease), width var(--speed) var(--ease);
}

.page-about .about-card:hover,
.page-about .about-card:focus-within {
  border-color: var(--mint);
  background: #103026;
}

.page-about .about-card:hover::after,
.page-about .about-card:focus-within::after {
  width: 56px;
  background: var(--mint);
}

.page-about .about-card__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--clay);
}

.page-about .about-card h3 {
  margin: 6px 0 10px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--snow);
}

.page-about .about-card p {
  margin: 0 0 10px;
  font-size: 15px;
  color: rgba(242, 247, 244, 0.88);
}

.page-about .about-card__extra {
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed rgba(94, 127, 99, 0.5);
  font-size: 13.5px;
  color: rgba(242, 247, 244, 0.7);
  transition: color var(--speed) var(--ease);
}

.page-about .about-card:hover .about-card__extra {
  color: rgba(242, 247, 244, 0.92);
}

/* ---------- 图 ---------- */
.page-about .about-figure {
  max-width: 520px;
  margin: 26px 0 0;
}

.page-about .about-figure--wide {
  max-width: none;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line-strong);
  background: var(--deep);
  object-fit: cover;
}

.page-about .about-figure--wide img {
  aspect-ratio: 2 / 1;
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  padding-left: 12px;
  border-left: 1px solid var(--clay);
  font-size: 13px;
  color: var(--about-soft);
}

/* ---------- 数据条 ---------- */
.page-about .about-metrics {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 22px 0 24px;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line-strong);
  background: var(--line-strong);
}

.page-about .about-metrics li {
  padding: 18px 16px;
  background: var(--deep);
}

.page-about .about-metrics b {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4.4vw, 2.6rem);
  line-height: 1;
  color: var(--mint);
}

.page-about .about-metrics span {
  display: block;
  margin-top: 8px;
  font-size: 13.5px;
  color: var(--about-soft);
}

.page-about .about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tags li {
  padding: 5px 10px;
  border: 1px solid var(--line);
  background: rgba(14, 42, 32, 0.72);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(242, 247, 244, 0.9);
  transition: border-color var(--speed) var(--ease), color var(--speed) var(--ease);
}

.page-about .about-tags li:hover {
  border-color: var(--mint);
  color: var(--mint);
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-timeline {
  margin: 24px 0 0;
  padding: 0 0 0 26px;
  list-style: none;
  border-left: 1px solid var(--line-strong);
}

.page-about .about-timeline li + li {
  margin-top: 10px;
}

.page-about .about-ver summary {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 8px 0;
  list-style: none;
  cursor: pointer;
}

.page-about .about-ver summary::-webkit-details-marker {
  display: none;
}

.page-about .about-ver summary::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 17px;
  width: 9px;
  height: 9px;
  border: 1px solid var(--mint);
  border-radius: 50%;
  background: var(--ink);
  transition: background-color var(--speed) var(--ease);
}

.page-about .about-ver[open] summary::before {
  background: var(--mint);
}

.page-about .about-ver summary:hover .about-ver__title,
.page-about .about-ver summary:focus-visible .about-ver__title {
  color: var(--mint);
}

.page-about .about-ver__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--clay);
}

.page-about .about-ver__title {
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.6vw, 1.35rem);
  font-weight: 700;
  color: var(--snow);
  transition: color var(--speed) var(--ease);
}

.page-about .about-ver__hint {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--moss);
}

.page-about .about-ver__hint::after {
  content: "+";
}

.page-about .about-ver[open] .about-ver__hint::after {
  content: "–";
  color: var(--mint);
}

.page-about .about-ver__body {
  padding: 2px 0 12px;
}

.page-about .about-ver__body p {
  margin: 0;
  font-size: 15px;
  color: rgba(242, 247, 244, 0.86);
}

@media (prefers-reduced-motion: no-preference) {
  .page-about .about-ver[data-pulse] summary::before,
  .page-about .about-ver summary[data-pulse]::before {
    animation: about-node-pulse 3.2s var(--ease) infinite;
  }
}

@keyframes about-node-pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(57, 245, 200, 0.34);
  }
  50% {
    box-shadow: 0 0 0 7px rgba(57, 245, 200, 0);
  }
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-top: 22px;
}

.page-about .about-partners__count {
  padding: 20px 18px;
  border: 1px solid var(--line-strong);
  background: linear-gradient(160deg, var(--deep) 0%, #0A1F18 100%);
}

.page-about .about-partners__count b {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.6rem, 8vw, 4rem);
  line-height: 1;
  color: var(--mint);
}

.page-about .about-partners__count span {
  display: block;
  margin-top: 8px;
  font-size: 13.5px;
  color: var(--about-soft);
}

.page-about .about-partners__matrix {
  height: 84px;
  margin-top: 16px;
  background-image: radial-gradient(circle, rgba(57, 245, 200, 0.55) 1.5px, transparent 1.6px);
  background-size: 14px 14px;
  opacity: 0.75;
  -webkit-mask-image: linear-gradient(90deg, #000 0%, rgba(0, 0, 0, 0.15) 100%);
  mask-image: linear-gradient(90deg, #000 0%, rgba(0, 0, 0, 0.15) 100%);
}

.page-about .about-partners__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-partners__list li {
  padding: 16px 16px 14px;
  background: var(--ink);
}

.page-about .about-partners__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--clay);
}

.page-about .about-partners__list h3 {
  margin: 6px 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--snow);
}

.page-about .about-partners__list p {
  margin: 0;
  font-size: 14.5px;
  color: rgba(242, 247, 244, 0.84);
}

/* ---------- 服务与联系 ---------- */
.page-about .about-service {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 22px;
}

.page-about .about-service__card {
  padding: 18px;
  border: 1px solid var(--line-strong);
  border-top: 2px solid var(--alert);
  background: var(--deep);
}

.page-about .about-service__card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--snow);
}

.page-about .about-service__card p {
  margin: 0;
  font-size: 14.5px;
  color: rgba(242, 247, 244, 0.86);
}

.page-about .about-contact {
  display: grid;
  gap: 8px;
  margin: 22px 0 0;
  padding: 16px 0 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 13px;
  color: rgba(242, 247, 244, 0.9);
  overflow-wrap: anywhere;
}

.page-about .about-contact span {
  display: inline-block;
  min-width: 76px;
  margin-right: 10px;
  color: var(--about-soft);
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 桌面 ---------- */
@media (min-width: 720px) {
  .page-about .about-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

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

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

@media (min-width: 900px) {
  .page-about .about-partners {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: 176px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 60px);
  }

  .page-about .about-index {
    position: sticky;
    top: 28px;
    padding-right: 8px;
    border-right: 1px solid var(--line);
  }

  .page-about .about-index__label {
    writing-mode: vertical-rl;
    margin-bottom: 20px;
    letter-spacing: 0.34em;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 0;
    margin-top: 0;
  }

  .page-about .about-index__list a {
    width: 100%;
    padding: 9px 0 9px 12px;
    border: 0;
    border-left: 1px solid var(--line);
    font-size: 13.5px;
  }

  .page-about .about-index__list a:hover,
  .page-about .about-index__list a:focus-visible {
    border-left-color: var(--mint);
    background: transparent;
  }

  .page-about .about-hero__title {
    max-width: 18ch;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__media {
    margin-top: 52px;
  }
}
<<<END>>>