.page-about {
  --about-line-x: 13px;
  --about-node-gap: 46px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(26px, 4.6vw, 52px) 0 clamp(38px, 6vw, 72px);
  border-bottom: var(--line-strong);
  background:
    radial-gradient(115% 85% at 100% 0%, rgba(240, 180, 41, 0.30) 0%, rgba(240, 180, 41, 0) 58%),
    radial-gradient(95% 80% at 0% 100%, rgba(30, 127, 79, 0.18) 0%, rgba(30, 127, 79, 0) 62%),
    var(--c-paper-050);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  top: -18%;
  right: -14%;
  width: min(620px, 72vw);
  height: 152%;
  background: linear-gradient(155deg, rgba(30, 127, 79, 0.24) 0%, rgba(124, 199, 154, 0.20) 44%, rgba(240, 180, 41, 0.28) 100%);
  clip-path: polygon(30% 0%, 100% 0%, 100% 100%, 0% 76%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__eyebrow {
  margin-top: clamp(18px, 3vw, 30px);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(29px, 5.4vw, 46px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--c-ink-900);
  margin: 14px 0 0;
  max-width: 19em;
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 62ch;
  color: var(--c-ink-900);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: clamp(26px, 4vw, 38px) 0 0;
  padding-top: 20px;
  border-top: 2px solid var(--c-navy-900);
}

.page-about .about-stat {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1;
  color: var(--c-green-600);
  letter-spacing: -0.02em;
}

.page-about .about-stat__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-gray-500);
}

@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
  }
  .page-about .about-stat {
    padding-right: 18px;
  }
  .page-about .about-stat + .about-stat {
    border-left: 2px solid var(--c-green-300);
    padding-left: 20px;
  }
}

/* ---------- 通用排版 ---------- */
.page-about .about-h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(23px, 3.4vw, 34px);
  line-height: 1.26;
  letter-spacing: -0.01em;
  color: var(--c-ink-900);
  margin: 10px 0 16px;
  max-width: 20em;
}

.page-about .about-p {
  font-size: 17px;
  line-height: 1.85;
  color: var(--c-ink-900);
  max-width: 68ch;
  margin: 0 0 16px;
}

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

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

/* ---------- 为什么做这件事 ---------- */
.page-about .about-why__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-why__media {
  order: -1;
}

@media (min-width: 900px) {
  .page-about .about-why__grid {
    grid-template-columns: 7fr 5fr;
    gap: 48px;
    align-items: start;
  }
  .page-about .about-why__media {
    order: 0;
    margin-top: 8px;
  }
}

/* ---------- 时间线 ---------- */
.page-about .about-track {
  border-top: var(--line-strong);
  border-bottom: var(--line-strong);
  padding: clamp(34px, 5vw, 64px) 0 clamp(34px, 5vw, 64px);
  background: linear-gradient(180deg, var(--c-paper-050) 0%, var(--c-green-050) 44%, var(--c-paper-050) 100%);
}

.page-about .about-track__lede {
  margin: 0;
  max-width: 60ch;
  color: var(--c-gray-500);
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-track__list {
  position: relative;
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
}

.page-about .about-track__list::before {
  content: "";
  position: absolute;
  left: var(--about-line-x);
  top: 12px;
  bottom: 26px;
  width: 3px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--c-green-600) 0%, var(--c-green-300) 46%, var(--c-navy-900) 100%);
}

.page-about .about-node {
  position: relative;
  padding: 0 0 24px var(--about-node-gap);
}

.page-about .about-node:last-child {
  padding-bottom: 0;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 16px;
  width: 19px;
  height: 19px;
  border: 3px solid var(--c-navy-900);
  border-radius: 50%;
  background: var(--c-paper-050);
}

.page-about .about-node__year {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--c-green-600);
  margin-bottom: 8px;
}

.page-about .about-node__panel {
  border: 2px solid var(--c-navy-900);
  border-radius: 2px;
  background: var(--c-paper-050);
  box-shadow: 3px 3px 0 0 var(--c-navy-900);
  transition: box-shadow var(--dur) var(--ease);
}

.page-about .about-node__panel[open] {
  box-shadow: 6px 6px 0 0 var(--c-green-600);
}

.page-about .about-node__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  padding: 15px 18px;
  min-height: 44px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-node__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 18px;
  line-height: 1;
  color: var(--c-green-600);
}

.page-about .about-node__panel[open] .about-node__summary::after {
  content: "−";
  color: var(--c-navy-900);
}

.page-about .about-node__summary:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

.page-about .about-node__title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--c-ink-900);
}

.page-about .about-node__meta {
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-gray-500);
}

.page-about .about-node__body {
  padding: 0 18px 18px;
}

.page-about .about-node__body p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-ink-900);
  max-width: 66ch;
}

@media (min-width: 860px) {
  .page-about .about-track__list::before {
    left: 87px;
  }
  .page-about .about-node {
    display: grid;
    grid-template-columns: 70px 1fr;
    gap: 0 40px;
    padding: 0 0 30px 0;
  }
  .page-about .about-node::before {
    left: 78px;
    top: 20px;
  }
  .page-about .about-node__year {
    grid-column: 1;
    text-align: right;
    font-size: 17px;
    margin: 14px 0 0;
  }
  .page-about .about-node__panel {
    grid-column: 2;
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team__lede {
  color: var(--c-ink-900);
  max-width: 64ch;
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: clamp(24px, 3.6vw, 36px);
}

.page-about .about-team__card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px 20px;
  border-top: 6px solid var(--c-green-600);
}

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(34px, 4.4vw, 46px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-green-600);
  margin: 0;
}

.page-about .about-team__num small {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0;
  color: var(--c-gray-500);
  margin-left: 8px;
}

@media (min-width: 720px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1080px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(12, 1fr);
    gap: 24px;
  }
  .page-about .about-team__card:nth-child(1) {
    grid-column: 1 / span 5;
  }
  .page-about .about-team__card:nth-child(2) {
    grid-column: 7 / span 6;
  }
  .page-about .about-team__card:nth-child(3) {
    grid-column: 3 / span 6;
  }
}

/* ---------- 更新节奏 ---------- */
.page-about .about-rhythm__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  align-items: start;
}

@media (min-width: 980px) {
  .page-about .about-rhythm__grid {
    grid-template-columns: 6fr 5fr;
    gap: 48px;
  }
  .page-about .about-rhythm__media {
    margin-top: 10px;
  }
}

.page-about .about-clock {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 22px 0 20px;
}

@media (min-width: 700px) {
  .page-about .about-clock {
    grid-template-columns: repeat(3, 1fr);
  }
}

.page-about .about-clock__slot {
  border: 2px solid var(--c-navy-900);
  border-left-width: 6px;
  border-radius: 2px;
  background: var(--c-green-050);
  padding: 14px 16px 16px;
}

.page-about .about-clock__slot:nth-child(2) {
  background: var(--c-yellow-100);
  border-left-color: var(--c-yellow-500);
}

.page-about .about-clock__slot:nth-child(3) {
  background: var(--c-paper-050);
  border-left-color: var(--c-navy-700);
}

.page-about .about-clock__slot strong {
  display: block;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.01em;
  color: var(--c-ink-900);
  margin-bottom: 6px;
}

.page-about .about-clock__slot span {
  display: block;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-ink-900);
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-reach__nums {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: clamp(22px, 3.4vw, 30px) 0 clamp(24px, 3.6vw, 34px);
}

.page-about .about-reach__num {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-reach__num .num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(30px, 4.6vw, 46px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-navy-900);
}

.page-about .about-reach__label {
  font-size: 14px;
  line-height: 1.6;
  color: var(--c-gray-500);
}

@media (min-width: 700px) {
  .page-about .about-reach__nums {
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
  }
  .page-about .about-reach__num {
    padding-right: 20px;
  }
  .page-about .about-reach__num + .about-reach__num {
    border-left: 2px solid var(--c-green-300);
    padding-left: 24px;
  }
}

.page-about .about-scenes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

@media (min-width: 760px) {
  .page-about .about-scenes {
    grid-template-columns: repeat(3, 1fr);
  }
}

.page-about .about-reach__drawer {
  margin-top: clamp(24px, 3.6vw, 34px);
  border: 2px solid var(--c-navy-900);
  border-left-width: 8px;
  border-left-color: var(--c-yellow-500);
  border-radius: 2px;
  background: var(--c-yellow-100);
}

.page-about .about-reach__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  min-height: 44px;
  cursor: pointer;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.01em;
  color: var(--c-ink-900);
  list-style: none;
}

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

.page-about .about-reach__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 18px;
  line-height: 1;
  color: var(--c-navy-900);
}

.page-about .about-reach__drawer[open] .about-reach__summary::after {
  content: "−";
}

.page-about .about-reach__summary:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

.page-about .about-reach__body {
  padding: 0 18px 20px;
}

.page-about .about-reach__body p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-ink-900);
  max-width: 72ch;
}

/* ---------- 收束 ---------- */
.page-about .about-outro {
  display: grid;
  gap: 28px;
}

.page-about .about-outro__media {
  margin: 0;
}

.page-about .about-outro__body .btn-row {
  margin: 22px 0 18px;
}

.page-about .about-outro__body .note {
  max-width: 60ch;
}

@media (min-width: 900px) {
  .page-about .about-outro {
    gap: 36px;
  }
  .page-about .about-outro__body {
    display: grid;
    grid-template-columns: 7fr 5fr;
    grid-template-rows: auto auto auto;
    column-gap: 48px;
  }
  .page-about .about-outro__body .eyebrow,
  .page-about .about-outro__body .about-h2,
  .page-about .about-outro__body .about-p {
    grid-column: 1;
  }
  .page-about .about-outro__body .btn-row,
  .page-about .about-outro__body .note {
    grid-column: 2;
  }
  .page-about .about-outro__body .btn-row {
    grid-row: 2;
    align-self: end;
    margin: 18px 0 12px;
  }
  .page-about .about-outro__body .note {
    grid-row: 3;
    align-self: start;
  }
}
<<<END>>>