.page-about {
  background: var(--chalk);
  color: var(--ink-900);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about a:focus-visible,
.page-about summary:focus-visible,
.page-about [tabindex]:focus-visible {
  outline: 2px solid var(--card-red);
  outline-offset: 3px;
}

/* 面包屑 */
.page-about .about-crumb {
  padding: 1rem 0 0;
}

.page-about .breadcrumb-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  font-size: 0.82rem;
  color: var(--slate-500);
}

.page-about .breadcrumb-list li + li::before {
  content: "/";
  margin-right: 0.4rem;
  color: var(--line-300);
}

/* 首屏 */
.page-about .about-head {
  position: relative;
  margin-top: 0.9rem;
  padding: clamp(2rem, 7vw, 4rem) 0 clamp(3.2rem, 8vw, 5.2rem);
  background:
    radial-gradient(115% 130% at 92% 4%, rgba(79, 176, 126, 0.5), rgba(79, 176, 126, 0) 58%),
    linear-gradient(150deg, #061E17 0%, #125640 55%, #1B7A55 100%);
  color: var(--chalk);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 40px), 0 100%);
}

.page-about .about-head-inner {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.8rem);
}

.page-about .about-eyebrow {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--turf-300);
}

.page-about .about-eyebrow .path-badge {
  text-transform: none;
  letter-spacing: 0;
}

.page-about .about-head h1 {
  margin: 0 0 1rem;
  max-width: 21ch;
  font-family: var(--font-display);
  font-size: clamp(2.05rem, 7vw, 3.85rem);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.01em;
}

.page-about .about-lede {
  margin: 0 0 1.6rem;
  max-width: 40rem;
  font-size: clamp(0.95rem, 2.4vw, 1.04rem);
  line-height: 1.85;
  color: rgba(246, 248, 246, 0.82);
}

.page-about .about-head-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.page-about .about-head-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: rgba(246, 248, 246, 0.16);
  border: 1px solid rgba(246, 248, 246, 0.16);
}

.page-about .about-head-stat {
  display: flex;
  flex-direction: column-reverse;
  gap: 0.2rem;
  padding: 0.85rem 0.9rem;
  background: rgba(6, 30, 23, 0.55);
}

.page-about .about-head-stat dt {
  margin: 0;
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: rgba(246, 248, 246, 0.62);
}

.page-about .about-head-stat dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 4vw, 1.7rem);
  font-weight: 600;
  line-height: 1.05;
  color: var(--chalk);
}

/* 章节通用 */
.page-about .about-sec {
  padding: clamp(2.4rem, 7vw, 4.6rem) 0;
}

.page-about .about-sec--tint {
  background: var(--turf-050);
}

.page-about .about-kicker {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--pitch-600);
}

.page-about .about-kicker::before {
  content: "";
  flex: none;
  width: 22px;
  height: 2px;
  background: var(--card-red);
}

.page-about .about-sec-head {
  max-width: 44rem;
  margin-bottom: clamp(1.6rem, 4vw, 2.4rem);
}

.page-about .about-sec-head h2 {
  margin: 0 0 0.7rem;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.6vw, 2.25rem);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -0.005em;
}

.page-about .about-sec-head p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--slate-500);
}

/* 品牌历程 */
.page-about .about-origin-grid {
  display: grid;
  gap: clamp(1.4rem, 4vw, 2.6rem);
}

.page-about .about-origin-copy h2 {
  margin: 0.2rem 0 0.9rem;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.6vw, 2.25rem);
  font-weight: 700;
  line-height: 1.16;
}

.page-about .about-origin-copy p {
  margin: 0 0 1rem;
  max-width: 44rem;
  font-size: 0.95rem;
  line-height: 1.85;
}

.page-about .about-origin-copy p:last-child {
  margin-bottom: 0;
}

.page-about .about-note {
  border: 1px solid var(--line-300);
  border-left: 3px solid var(--pitch-600);
  background: #fff;
  padding: 1.3rem 1.25rem;
  box-shadow: 0 18px 36px -32px rgba(8, 37, 28, 0.55);
}

.page-about .about-note-title {
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--slate-500);
}

.page-about .about-note-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
  font-size: 0.88rem;
  color: var(--slate-500);
}

.page-about .about-note-list li {
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px dashed var(--line-300);
}

.page-about .about-note-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-note-list .num {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--pitch-600);
}

/* 两条路径 */
.page-about .about-paths-grid {
  display: grid;
  gap: 1rem;
}

.page-about .about-path {
  background: #fff;
  border: 1px solid var(--line-300);
  border-top: 4px solid var(--pitch-600);
  padding: 1.3rem 1.2rem 1.4rem;
  transition: transform var(--dur) ease, box-shadow var(--dur) ease, border-color var(--dur) ease;
}

.page-about .about-path--b {
  border-top-color: var(--card-yellow);
}

.page-about .about-path:hover {
  transform: translateY(-2px);
  box-shadow: 0 22px 36px -30px rgba(8, 37, 28, 0.6);
}

.page-about .about-path-tag {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--pitch-600);
}

.page-about .about-path--b .about-path-tag {
  color: var(--card-yellow-dark);
}

.page-about .about-path h3 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 1.28rem;
  font-weight: 700;
  line-height: 1.25;
}

.page-about .about-path-rows {
  margin: 0 0 1.1rem;
  display: grid;
  gap: 0.7rem;
}

.page-about .about-path-rows > div {
  display: grid;
  gap: 0.2rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--line-300);
}

.page-about .about-path-rows > div:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-path-rows dt {
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--slate-500);
}

.page-about .about-path-rows dd {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
}

.page-about .about-path-link {
  display: inline-block;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--pitch-600);
  text-decoration: none;
  border-bottom: 1px solid var(--pitch-600);
  padding-bottom: 1px;
  transition: color var(--dur) ease, border-color var(--dur) ease;
}

.page-about .about-path-link:hover {
  color: var(--card-red);
  border-color: var(--card-red);
}

/* 数据旅程 */
.page-about .about-journey-figure {
  margin: 0 0 1.4rem;
}

.page-about .about-journey-figure img {
  display: block;
  width: 100%;
  border: 1px solid var(--line-300);
}

.page-about .about-journey-figure figcaption,
.page-about .about-team-figure figcaption,
.page-about .about-timeline-figure figcaption {
  margin-top: 0.6rem;
  font-size: 0.78rem;
  color: var(--slate-500);
}

.page-about .about-arrow {
  display: block;
  width: 100%;
  height: auto;
  max-height: 64px;
  margin: 0 0 1.1rem;
  color: var(--turf-300);
}

.page-about .about-steps {
  display: grid;
  gap: 0.8rem;
}

.page-about .about-step {
  background: #fff;
  border: 1px solid var(--line-300);
  transition: border-color var(--dur) ease, box-shadow var(--dur) ease;
}

.page-about .about-step:hover {
  border-color: var(--turf-300);
}

.page-about .about-step[open] {
  border-color: var(--pitch-600);
  box-shadow: inset 0 0 0 1px var(--pitch-600);
}

.page-about .about-step-sum {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.9rem 1rem;
  cursor: pointer;
  list-style: none;
}

.page-about .about-step-sum::-webkit-details-marker {
  display: none;
}

.page-about .about-step-no {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--pitch-600);
}

.page-about .about-step-name {
  font-family: var(--font-display);
  font-size: 1.14rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .about-step-metric {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  padding: 0.1rem 0.45rem;
  color: var(--card-red);
  background: rgba(214, 43, 49, 0.08);
  border: 1px solid rgba(214, 43, 49, 0.25);
}

.page-about .about-step-body {
  padding: 0 1rem 1rem;
}

.page-about .about-step-body p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--slate-500);
}

/* 团队 */
.page-about .about-team-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.4rem);
}

.page-about .about-team-figure {
  margin: 0;
}

.page-about .about-team-figure img {
  display: block;
  width: 100%;
  border: 1px solid var(--line-300);
}

.page-about .about-team-copy h2 {
  margin: 0.2rem 0 0.9rem;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.6vw, 2.25rem);
  font-weight: 700;
  line-height: 1.16;
}

.page-about .about-team-copy > p {
  margin: 0 0 1.2rem;
  font-size: 0.95rem;
  line-height: 1.8;
}

.page-about .about-roster {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.3rem;
  font-size: 0.88rem;
}

.page-about .about-roster caption {
  padding-bottom: 0.5rem;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--slate-500);
}

.page-about .about-roster th,
.page-about .about-roster td {
  padding: 0.6rem 0.5rem 0.6rem 0;
  border-bottom: 1px solid var(--line-300);
  text-align: left;
  vertical-align: top;
  line-height: 1.65;
}

.page-about .about-roster thead th {
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--slate-500);
  border-bottom: 1px solid var(--ink-900);
}

.page-about .about-roster tbody th {
  font-weight: 500;
  white-space: nowrap;
}

.page-about .about-roster td.num {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--pitch-600);
  white-space: nowrap;
}

.page-about .about-team-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.page-about .about-team-facts li {
  display: grid;
  gap: 0.15rem;
  padding-left: 0.9rem;
  border-left: 2px solid var(--turf-300);
  font-size: 0.88rem;
  line-height: 1.7;
}

.page-about .about-team-facts span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--slate-500);
}

/* 时间轴 */
.page-about .about-timeline-grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.6rem);
}

.page-about .about-timeline-figure {
  margin: 0;
}

.page-about .about-timeline-figure img {
  display: block;
  width: 100%;
  border: 1px solid var(--line-300);
}

.page-about .about-axis {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-axis-item {
  position: relative;
  padding: 0 0 1.7rem 1.5rem;
  border-left: 1px solid var(--line-300);
}

.page-about .about-axis-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-axis-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 0.55rem;
  width: 9px;
  height: 9px;
  background: var(--chalk);
  border: 2px solid var(--pitch-600);
  border-radius: 50%;
  transition: background var(--dur) ease, border-color var(--dur) ease;
}

.page-about .about-axis-item--red::before {
  border-color: var(--card-red);
}

.page-about .about-axis-item:hover::before,
.page-about .about-axis-item:focus-within::before {
  background: var(--card-red);
  border-color: var(--card-red);
}

.page-about .about-axis-year {
  display: block;
  margin-bottom: 0.45rem;
  font-family: var(--font-mono);
  font-size: clamp(2rem, 7vw, 3rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--pitch-600);
}

.page-about .about-axis-item--red .about-axis-year {
  color: var(--card-red);
}

.page-about .about-axis-item h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.page-about .about-axis-item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--slate-500);
}

.page-about .about-axis-item p.about-axis-more {
  margin-top: 0.4rem;
  font-size: 0.8rem;
}

/* 合作与认可 */
.page-about .about-honor-grid {
  display: grid;
  gap: 1rem;
  margin-bottom: clamp(1.4rem, 4vw, 2rem);
}

.page-about .about-honor {
  background: #fff;
  border: 1px solid var(--line-300);
  padding: 1.3rem 1.2rem 1.4rem;
}

.page-about .about-honor h3 {
  margin: 0.8rem 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.24rem;
  font-weight: 700;
  line-height: 1.3;
}

.page-about .about-honor p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--slate-500);
}

.page-about .about-reach {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-300);
  border: 1px solid var(--line-300);
}

.page-about .about-reach li {
  display: grid;
  gap: 0.25rem;
  padding: 1rem 1.1rem;
  background: var(--chalk);
}

.page-about .about-reach-num {
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 4vw, 1.7rem);
  font-weight: 600;
  line-height: 1.1;
  color: var(--pitch-600);
}

.page-about .about-reach-label {
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--slate-500);
}

/* 结尾 */
.page-about .about-cta {
  padding-bottom: clamp(2.6rem, 7vw, 4.5rem);
}

.page-about .about-cta-panel {
  padding: clamp(1.7rem, 5vw, 3rem);
  background: linear-gradient(140deg, #061E17 0%, #125640 62%, #1B7A55 100%);
  color: var(--chalk);
  clip-path: polygon(0 26px, 100% 0, 100% 100%, 0 100%);
}

.page-about .about-cta-panel h2 {
  margin: 0 0 0.8rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.6vw, 2.1rem);
  font-weight: 700;
  line-height: 1.18;
}

.page-about .about-cta-panel p {
  margin: 0 0 1.4rem;
  max-width: 42rem;
  font-size: 0.95rem;
  line-height: 1.85;
  color: rgba(246, 248, 246, 0.82);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-bottom: 1.2rem;
}

.page-about .about-cta-panel p.about-cta-contact {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.79rem;
  color: rgba(246, 248, 246, 0.7);
}

/* 断点 */
@media (min-width: 460px) {
  .page-about .about-path-rows > div {
    grid-template-columns: 4.6rem minmax(0, 1fr);
    gap: 0.8rem;
  }
}

@media (min-width: 720px) {
  .page-about .about-reach {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-honor-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }

  .page-about .about-steps {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

@media (min-width: 820px) {
  .page-about .about-paths-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
}

@media (min-width: 880px) {
  .page-about .about-origin-grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.75fr);
    align-items: start;
  }

  .page-about .about-timeline-grid {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    align-items: start;
  }

  .page-about .about-axis-item {
    padding: 0 1.6rem 1.8rem 0;
    border-left: 0;
    border-right: 1px solid var(--line-300);
    text-align: right;
  }

  .page-about .about-axis-item:last-child {
    border-right-color: transparent;
    border-left-color: transparent;
  }

  .page-about .about-axis-item::before {
    left: auto;
    right: -5px;
  }
}

@media (min-width: 900px) {
  .page-about .about-head-inner {
    grid-template-columns: minmax(0, 1fr) 19rem;
    align-items: end;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-about .about-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (hover: hover) and (min-width: 880px) {
  .page-about .about-axis-item p.about-axis-more {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height var(--dur) ease, opacity var(--dur) ease;
  }

  .page-about .about-axis-item:hover p.about-axis-more,
  .page-about .about-axis-item:focus-within p.about-axis-more {
    max-height: 5rem;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-path,
  .page-about .about-step,
  .page-about .about-axis-item::before,
  .page-about .about-axis-item p.about-axis-more {
    transition: none;
  }
}
<<<END>>>