.page-about {
  --about-hairline: #22304A;
  --about-shadow: 0 18px 40px rgba(4, 9, 18, .45);
  background: var(--ink-900);
  color: var(--text);
  font-family: var(--font-body);
  overflow-x: hidden;
}

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

.page-about .section {
  padding-block: clamp(40px, 7vw, 92px);
}

.page-about .section--panel {
  background:
    radial-gradient(circle at 88% 0%, rgba(46, 212, 122, .06), transparent 58%),
    var(--ink-800);
  border-block: 1px solid var(--about-hairline);
}

.page-about h2 {
  font-family: var(--font-title);
  font-size: clamp(28px, 4.4vw, 40px);
  line-height: 1.06;
  letter-spacing: -.01em;
  margin: 8px 0 0;
}

.page-about h3 {
  font-family: var(--font-title);
  font-size: clamp(19px, 2.2vw, 23px);
  line-height: 1.2;
  letter-spacing: -.01em;
  margin: 0;
}

.page-about .about-section__lead {
  max-width: 62ch;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .section__head {
  margin-bottom: clamp(22px, 3.4vw, 40px);
}

.page-about .figure-frame {
  border: 1px solid var(--about-hairline);
  background: var(--ink-800);
  overflow: hidden;
}

.page-about .figure-frame img {
  width: 100%;
  object-fit: cover;
}

.page-about .figure-frame__caption {
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--about-hairline);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(20px, 4vw, 46px) clamp(36px, 6vw, 84px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: end;
}

.page-about .about-hero__title {
  font-family: var(--font-title);
  font-size: clamp(38px, 9.2vw, 86px);
  line-height: .96;
  letter-spacing: -.015em;
  margin: 10px 0 0;
}

.page-about .about-hero__lead {
  max-width: 60ch;
  margin: clamp(16px, 2.2vw, 24px) 0 0;
  color: var(--muted);
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.75;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--about-hairline);
  border: 1px solid var(--about-hairline);
}

.page-about .about-hero__stat {
  background: var(--ink-800);
  padding: 14px 16px;
}

.page-about .about-hero__stat dt {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-about .about-hero__stat dd {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.2vw, 24px);
  color: var(--text);
}

.page-about .about-hero__figure {
  margin: clamp(28px, 4.5vw, 52px) 0 0;
}

.page-about .about-hero__figure img {
  aspect-ratio: 1920 / 1000;
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(300px, 1fr);
    gap: clamp(32px, 4vw, 64px);
  }

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

/* ---------- 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
}

.page-about .about-origin__text p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.78;
  max-width: 62ch;
}

.page-about .about-origin__text .btn {
  margin-top: clamp(18px, 2.4vw, 26px);
}

.page-about .about-origin__contrast .data-list {
  display: grid;
  gap: 1px;
  background: var(--about-hairline);
  border: 1px solid var(--about-hairline);
}

.page-about .about-origin__contrast .data-list__row {
  display: grid;
  gap: 6px;
  background: var(--ink-900);
  padding: 14px 16px;
}

.page-about .about-origin__contrast .data-list__key {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--green);
}

.page-about .about-origin__contrast .data-list__val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(300px, 1fr);
    align-items: start;
  }

  .page-about .about-origin__contrast .data-list__row {
    grid-template-columns: 92px minmax(0, 1fr);
    align-items: baseline;
    gap: 14px;
  }
}

/* ---------- 版本演进 ---------- */
.page-about .about-versions__layout {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-about .version-axis {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .version-axis > li {
  flex: 0 0 auto;
}

.page-about .version-node {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 148px;
  padding: 10px 14px;
  border: 1px solid var(--about-hairline);
  border-radius: var(--radius);
  background: var(--ink-800);
  color: var(--text);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background var(--dur), border-color var(--dur), color var(--dur);
}

.page-about .version-node:hover {
  background: var(--ink-700);
  border-color: var(--line-strong);
}

.page-about .version-node[aria-pressed="true"] {
  background: var(--ink-700);
  border-color: var(--green);
  box-shadow: inset 2px 0 0 var(--green);
}

.page-about .version-node__num {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--green);
}

.page-about .version-node__name {
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
}

.page-about .version-node[aria-pressed="true"] .version-node__name {
  color: var(--text);
}

.page-about .about-versions__main {
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
  min-width: 0;
}

.page-about .version-panels {
  display: grid;
  gap: 1px;
  background: var(--about-hairline);
  border: 1px solid var(--about-hairline);
}

.page-about .version-panel {
  background: var(--ink-800);
  border: 0;
  border-radius: 0;
  padding: clamp(18px, 2.6vw, 26px);
}

.page-about .version-panel__tag {
  margin: 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--orange);
}

.page-about .version-panel__title {
  margin: 10px 0 0;
}

.page-about .version-panel__text {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .version-panel__points {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .version-panel__points li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
}

.page-about .version-panel__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
}

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

.page-about .about-versions__figure img {
  aspect-ratio: 1200 / 800;
  filter: saturate(.75) contrast(1.05);
}

@media (min-width: 760px) {
  .page-about .version-panels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-about .about-versions__layout {
    grid-template-columns: minmax(190px, 230px) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-about .version-axis {
    flex-direction: column;
    overflow: visible;
    padding: 6px 0 6px 22px;
    position: sticky;
    top: 96px;
  }

  .page-about .version-axis::before {
    content: "";
    position: absolute;
    left: 7px;
    top: 10px;
    bottom: 10px;
    width: 1px;
    background: linear-gradient(180deg, var(--green), var(--cyan) 48%, var(--orange));
  }

  .page-about .version-axis > li {
    width: 100%;
  }

  .page-about .version-node {
    width: 100%;
    min-width: 0;
  }

  .page-about .version-node::before {
    content: "";
    position: absolute;
    left: -19px;
    top: 17px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--ink-900);
    border: 1px solid var(--green);
  }

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

/* ---------- 团队 ---------- */
.page-about .team-table {
  display: grid;
  gap: 1px;
  background: var(--about-hairline);
  border: 1px solid var(--about-hairline);
}

.page-about .team-row {
  display: grid;
  gap: 8px;
  padding: 18px 16px;
  background: var(--ink-900);
}

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

.page-about .team-row__num {
  margin: 0;
  font-size: clamp(20px, 2.6vw, 26px);
  color: var(--green);
  line-height: 1;
}

.page-about .team-row__num small {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--muted);
  margin-left: 4px;
}

.page-about .team-row__desc {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .team-shift {
  margin-top: clamp(18px, 2.6vw, 28px);
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--about-hairline);
  border-left: 2px solid var(--orange);
  background: var(--ink-900);
}

.page-about .team-shift__label {
  margin: 0;
  color: var(--muted);
}

.page-about .team-shift__text {
  margin: 10px 0 0;
  max-width: 78ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text);
}

@media (min-width: 820px) {
  .page-about .team-row {
    grid-template-columns: minmax(0, 1fr) 92px minmax(0, 1.7fr);
    align-items: baseline;
    gap: 22px;
    padding: 20px 22px;
  }

  .page-about .team-row__num {
    text-align: right;
  }
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-scope__stage {
  position: relative;
  isolation: isolate;
}

.page-about .about-scope__texture {
  position: absolute;
  inset: 0;
  z-index: -1;
  margin: 0;
  border: 0;
  opacity: .22;
  pointer-events: none;
}

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

.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .filter-bar__btn {
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  padding: 8px 12px;
  border: 1px solid var(--about-hairline);
  border-radius: var(--radius);
  background: var(--ink-900);
  color: var(--muted);
  cursor: pointer;
  transition: color var(--dur), background var(--dur), border-color var(--dur);
}

.page-about .filter-bar__btn:hover {
  color: var(--text);
  border-color: var(--line-strong);
}

.page-about .filter-bar__btn[aria-pressed="true"] {
  background: var(--green);
  border-color: var(--green);
  color: var(--ink-900);
}

.page-about .about-scope__items {
  display: grid;
  gap: 1px;
  margin-top: 16px;
  background: var(--about-hairline);
  border: 1px solid var(--about-hairline);
}

.page-about .scope-card {
  padding: 20px 18px;
  background: rgba(8, 14, 26, .9);
}

.page-about .scope-card__meta {
  margin: 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .scope-card__title {
  margin: 10px 0 0;
}

.page-about .scope-card__text {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

@media (min-width: 700px) {
  .page-about .about-scope__items {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .page-about .about-scope__items {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 数据节奏 ---------- */
.page-about .rhythm {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--about-hairline);
  border: 1px solid var(--about-hairline);
}

.page-about .rhythm__item {
  display: grid;
  gap: 8px;
  padding: 20px 18px;
  background: var(--ink-900);
  align-content: start;
}

.page-about .rhythm__item--alert {
  background: var(--ink-800);
  box-shadow: inset 0 2px 0 var(--amber);
}

.page-about .rhythm__time {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--green);
}

.page-about .rhythm__item--alert .rhythm__time {
  color: var(--amber);
}

.page-about .rhythm__title {
  margin: 0;
  font-size: clamp(18px, 2vw, 21px);
}

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

@media (min-width: 760px) {
  .page-about .rhythm {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .rhythm {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 三件事 ---------- */
.page-about .claims {
  display: grid;
  gap: 1px;
  background: var(--about-hairline);
  border: 1px solid var(--about-hairline);
}

.page-about .claim {
  padding: clamp(20px, 2.8vw, 32px);
  background: var(--ink-800);
}

.page-about .claim__idx {
  margin: 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--orange);
}

.page-about .claim__title {
  margin: 12px 0 0;
  font-size: clamp(22px, 2.6vw, 27px);
}

.page-about .claim__text {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.78;
}

.page-about .about-claims__cta {
  display: grid;
  gap: 14px;
  margin-top: clamp(22px, 3vw, 34px);
  padding-top: clamp(20px, 2.6vw, 28px);
  border-top: 1px solid var(--about-hairline);
}

.page-about .about-claims__cta-text {
  margin: 0;
  font-family: var(--font-title);
  font-size: clamp(18px, 2.2vw, 22px);
}

.page-about .about-claims__cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (min-width: 820px) {
  .page-about .claims {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-claims__cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .version-node,
  .page-about .filter-bar__btn {
    transition: none;
  }
}
<<<END>>>