.page-about .about-head {
  position: relative;
  overflow: hidden;
  background: var(--c-white);
}

.page-about .about-head::after {
  content: "";
  position: absolute;
  left: 48%;
  right: -12%;
  bottom: -46%;
  height: 300px;
  background: repeating-linear-gradient(115deg, rgba(124, 194, 66, .18) 0 2px, transparent 2px 16px);
  transform: rotate(-5deg);
  pointer-events: none;
}

.page-about .about-head .breadcrumbs {
  position: relative;
  z-index: 1;
  margin-bottom: 20px;
  font-size: 13px;
}

.page-about .about-head-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 24px;
}

.page-about .about-head h1 {
  margin: 10px 0 0;
  font-size: clamp(30px, 6.4vw, 56px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  max-width: 18em;
}

.page-about .about-hl {
  color: var(--c-leaf-deep);
}

.page-about .about-head .lead {
  margin: 18px 0 0;
  max-width: 34em;
  color: var(--c-ink-soft);
}

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

.page-about .about-head-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-head-mark {
  display: none;
}

@media (min-width: 900px) {
  .page-about .about-head-grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    align-items: end;
    gap: 40px;
  }

  .page-about .about-head-mark {
    display: block;
    position: relative;
    align-self: stretch;
    min-height: 220px;
    border-left: 2px solid var(--c-kiwi);
    padding-left: 18px;
  }

  .page-about .about-head-mark-dot {
    position: absolute;
    top: 0;
    left: -8px;
    width: 14px;
    height: 14px;
    background: var(--c-court);
    clip-path: polygon(0 0, 100% 0, 100% 68%, 68% 100%, 0 100%);
  }

  .page-about .about-head-mark-line {
    display: block;
    height: 100%;
    background: repeating-linear-gradient(125deg, rgba(16, 22, 15, .12) 0 1px, transparent 1px 12px);
  }

  .page-about .about-head-mark-text {
    position: absolute;
    bottom: 0;
    right: 0;
    font-size: 12px;
    letter-spacing: .14em;
    color: var(--c-grey);
  }
}

/* ===== 左栏 + 右栏 主叙事 ===== */

.page-about .about-body {
  padding-block: 40px 56px;
}

.page-about .about-stage {
  display: grid;
  gap: 28px;
}

.page-about .about-rail-inner {
  background: linear-gradient(155deg, var(--c-night), var(--c-seed));
  color: var(--c-white);
  padding: 26px 20px 28px;
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
}

.page-about .about-rail-eyebrow {
  margin: 0;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--c-kiwi);
}

.page-about .about-rail-title {
  margin: 14px 0 0;
  font-size: clamp(22px, 4.6vw, 28px);
  line-height: 1.25;
}

.page-about .about-rail-text {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, .76);
}

.page-about .about-index {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line-dark);
}

.page-about .about-index-title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .16em;
  color: rgba(255, 255, 255, .56);
}

.page-about .about-index-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-about .about-index-link {
  display: block;
  padding: 7px 10px 7px 14px;
  font-size: 14px;
  color: var(--c-leaf);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 120ms var(--ease), border-color 120ms var(--ease), background-color 120ms var(--ease);
}

.page-about .about-index-link:hover,
.page-about .about-index-link:focus-visible {
  color: var(--c-white);
  border-left-color: var(--c-kiwi);
  background: rgba(124, 194, 66, .12);
}

.page-about .about-rail-stats {
  display: grid;
  gap: 10px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--line-dark);
}

.page-about .about-rail-stats .stat-bar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .about-rail-stats .stat-value {
  font-family: var(--font-mono);
  font-size: 20px;
  letter-spacing: .02em;
  color: var(--c-court);
}

.page-about .about-rail-stats .stat-label {
  font-size: 13px;
  color: rgba(255, 255, 255, .7);
}

@media (min-width: 1024px) {
  .page-about .about-stage {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-rail-inner {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    padding: 30px 26px 32px;
  }
}

/* ===== 右栏内容块 ===== */

.page-about .about-flow {
  display: grid;
  gap: 24px;
}

.page-about .about-block {
  padding: 26px 20px 30px;
  background: var(--c-white);
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 0 100%);
}

.page-about .about-block--leaf {
  background: var(--c-leaf);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 24px 100%, 0 calc(100% - 24px));
}

.page-about .about-num {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--c-court);
}

.page-about .about-block .section-title {
  margin: 0;
  font-size: clamp(22px, 3.6vw, 32px);
  line-height: 1.2;
}

.page-about .about-text {
  margin: 14px 0 0;
  color: var(--c-ink-soft);
  line-height: 1.85;
}

.page-about .about-note {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--c-kiwi);
  font-size: 14px;
  color: var(--c-grey);
}

.page-about .about-note a {
  color: var(--c-leaf-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-media {
  margin: 22px 0 0;
  aspect-ratio: auto;
  background: linear-gradient(140deg, var(--c-leaf), var(--c-white));
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

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

.page-about .about-media .media-caption {
  margin: 0;
  padding: 10px 14px 12px;
  font-size: 13px;
  color: var(--c-grey);
  background: rgba(255, 255, 255, .72);
}

/* ===== 时间轴 ===== */

.page-about .about-timeline {
  display: grid;
  gap: 20px;
  margin-top: 22px;
}

.page-about .about-node-list {
  position: relative;
  display: grid;
  gap: 10px;
}

.page-about .about-node-list::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 18px;
  bottom: 18px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-kiwi), var(--c-court));
  opacity: .55;
}

.page-about .about-node {
  position: relative;
  display: grid;
  grid-template-columns: 34px 1fr;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 11px 14px 11px 0;
  margin: 0;
  text-align: left;
  font: inherit;
  color: var(--c-seed);
  background: var(--c-white);
  border: 1px solid var(--line-light);
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: background-color 120ms var(--ease), border-color 120ms var(--ease);
}

.page-about .about-node-index {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  font-size: 12px;
  background: var(--c-mist);
  color: var(--c-seed);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
}

.page-about .about-node-text {
  display: grid;
  gap: 2px;
}

.page-about .about-node-label {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.3;
}

.page-about .about-node-sub {
  font-size: 12px;
  color: var(--c-grey);
  line-height: 1.4;
}

.page-about .about-node:hover {
  background: var(--c-mist);
}

.page-about .about-node[aria-selected="true"] {
  background: var(--c-leaf);
  border-color: var(--c-kiwi);
}

.page-about .about-node[aria-selected="true"] .about-node-index {
  background: var(--c-court);
  color: var(--c-white);
}

.page-about .about-node-panels {
  display: grid;
  gap: 14px;
}

.page-about .about-node-panel {
  padding: 20px 18px 22px;
  background: var(--c-mist);
  border-left: 3px solid var(--c-kiwi);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-about .about-node-panel h3 {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.3;
}

.page-about .about-node-panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

@media (min-width: 1200px) {
  .page-about .about-timeline {
    grid-template-columns: minmax(0, 4fr) minmax(0, 6fr);
    gap: 24px;
    align-items: start;
  }
}

/* ===== 团队分工标签 ===== */

.page-about .about-team {
  margin-top: 20px;
}

.page-about .about-team-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-team-tabs .seg-btn {
  padding: 8px 15px;
  font: inherit;
  font-size: 14px;
  color: var(--c-seed);
  background: var(--c-white);
  border: 1px solid var(--line-light);
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: background-color 120ms var(--ease), color 120ms var(--ease), border-color 120ms var(--ease);
}

.page-about .about-team-tabs .seg-btn:hover {
  border-color: var(--c-kiwi);
}

.page-about .about-team-tabs .seg-btn[aria-selected="true"] {
  background: var(--c-kiwi);
  border-color: var(--c-kiwi);
  color: var(--c-seed);
  font-weight: 700;
}

.page-about .about-team-panels {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.page-about .about-team-panel {
  padding: 18px 18px 20px;
  background: var(--c-leaf);
  border-left: 3px solid var(--c-leaf-deep);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-about .about-team-panel h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.page-about .about-team-panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

/* ===== 联系区块 ===== */

.page-about .about-contact {
  background: linear-gradient(160deg, var(--c-night), var(--c-seed));
  color: var(--c-white);
}

.page-about .about-contact .eyebrow {
  color: var(--c-kiwi);
}

.page-about .about-contact .section-title {
  margin: 10px 0 0;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.2;
}

.page-about .about-contact .about-text {
  color: rgba(255, 255, 255, .78);
  max-width: 34em;
}

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

.page-about .about-contact-grid {
  display: grid;
  gap: 32px;
}

.page-about .about-contact-list {
  display: grid;
  gap: 14px;
}

.page-about .about-contact-list .contact-item {
  padding: 16px 18px;
  background: rgba(255, 255, 255, .06);
  border-left: 3px solid var(--c-kiwi);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.page-about .about-contact-list .contact-label {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: .14em;
  color: rgba(255, 255, 255, .6);
}

.page-about .about-contact-list .contact-value {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-white);
  word-break: break-word;
}

.page-about .about-contact-list .contact-value.mono {
  font-family: var(--font-mono);
  letter-spacing: .02em;
  color: var(--c-leaf);
}

.page-about .about-contact-list .copy-btn {
  margin-top: 10px;
  padding: 6px 14px;
  font: inherit;
  font-size: 13px;
  color: var(--c-seed);
  background: var(--c-kiwi);
  border: none;
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: background-color 120ms var(--ease);
}

.page-about .about-contact-list .copy-btn:hover {
  background: var(--c-leaf);
}

@media (min-width: 960px) {
  .page-about .about-contact-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
  }

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

  .page-about .about-contact-list .contact-item--wide {
    grid-column: 1 / -1;
  }
}

.page-about :focus-visible {
  outline: 2px solid var(--c-kiwi);
  outline-offset: 2px;
}
<<<END>>>