.page-about {
  --about-pad: clamp(24px, 5vw, 64px);
  --about-line: 1px solid rgba(107, 122, 144, 0.28);
  --about-line-soft: 1px solid rgba(107, 122, 144, 0.16);
  color: var(--chalk-050);
}

.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 14px var(--gutter) 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel-500);
}

.page-about .about-crumb .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: rgba(107, 122, 144, 0.6);
}

.page-about .about-crumb a {
  color: var(--steel-500);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--flame-500);
  border-bottom-color: var(--flame-500);
}

.page-about .about-kicker {
  margin: 0 0 12px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--signal-400);
  text-transform: uppercase;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  display: grid;
  gap: 20px;
  padding: clamp(28px, 6vw, 72px) var(--gutter) clamp(36px, 7vw, 84px);
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 92% 8%, rgba(255, 75, 31, 0.22), transparent 62%),
    repeating-linear-gradient(90deg, var(--grid-line) 0 1px, transparent 1px 88px),
    linear-gradient(180deg, var(--ink-950), var(--ink-800));
  border-bottom: var(--about-line);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: linear-gradient(90deg, var(--flame-500), rgba(255, 75, 31, 0) 70%);
}

.page-about .about-hero__years {
  display: flex;
  gap: 16px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--steel-500);
  border-top: var(--about-line);
  padding-top: 10px;
}

.page-about .about-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 8vw, 96px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--chalk-050);
  transform: rotate(-1.5deg);
  text-shadow: 4px 4px 0 rgba(255, 75, 31, 0.55);
  max-width: 18em;
}

.page-about .about-lead {
  margin: 0 0 24px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(244, 241, 236, 0.86);
  border-left: 4px solid var(--flame-500);
  padding-left: 14px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 通用区块 ---------- */
.page-about .about-sec {
  position: relative;
  padding: var(--about-pad) var(--gutter);
  border-bottom: var(--about-line-soft);
}

.page-about .about-sec__head {
  max-width: 42em;
  margin-bottom: clamp(20px, 4vw, 40px);
}

.page-about .about-sec h2,
.page-about .about-close h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4.6vw, 46px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--chalk-050);
}

.page-about .about-sec h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--chalk-050);
  letter-spacing: 0.01em;
}

.page-about .about-sec p,
.page-about .about-close p {
  margin: 0 0 0.9em;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(244, 241, 236, 0.82);
}

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

.page-about .about-strong {
  border-left: 4px solid var(--flame-500);
  padding-left: 14px;
  color: var(--chalk-050) !important;
  font-weight: 700;
}

.page-about .about-sec a {
  color: var(--signal-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 192, 0.45);
}

.page-about .about-sec a:hover,
.page-about .about-sec a:focus-visible {
  color: var(--flame-500);
  border-bottom-color: var(--flame-500);
}

/* ---------- 为什么要做 ---------- */
.page-about .about-sec--why {
  background: var(--ink-950);
}

.page-about .about-cols {
  display: grid;
  gap: clamp(18px, 3vw, 36px);
}

/* ---------- 团队 ---------- */
.page-about .about-sec--crew {
  background: var(--ink-800);
}

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

.page-about .crew-legend {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .crew-legend li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: rgba(244, 241, 236, 0.78);
}

.page-about .crew-legend__swatch {
  width: 12px;
  height: 12px;
  flex: none;
  border: 1px solid currentColor;
}

.page-about .crew-legend__swatch--edit {
  color: var(--signal-400);
  background: rgba(53, 240, 192, 0.2);
}

.page-about .crew-legend__swatch--watch {
  color: var(--flame-500);
  background: rgba(255, 75, 31, 0.24);
}

.page-about .about-crew__visual {
  display: grid;
  gap: 18px;
}

.page-about .crew-board {
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  gap: 6px;
  padding: 14px;
  border: var(--about-line);
  background: rgba(8, 13, 22, 0.6);
}

.page-about .crew-board__cell {
  aspect-ratio: 1 / 1;
  border: 1px solid rgba(53, 240, 192, 0.45);
  background: rgba(53, 240, 192, 0.12);
  transition: background var(--dur-hover) linear, border-color var(--dur-hover) linear;
}

.page-about .crew-board__cell--watch {
  border-color: rgba(255, 75, 31, 0.6);
  background: rgba(255, 75, 31, 0.22);
}

.page-about .crew-board:hover .crew-board__cell {
  background: rgba(53, 240, 192, 0.28);
  border-color: var(--signal-400);
}

.page-about .crew-board:hover .crew-board__cell--watch {
  background: rgba(255, 75, 31, 0.5);
  border-color: var(--flame-500);
}

.page-about .about-figure {
  margin: 0;
  border: var(--about-line);
  background: var(--ink-700);
  overflow: hidden;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.06);
}

.page-about .about-figure figcaption {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--steel-500);
  border-top: var(--about-line-soft);
}

/* ---------- 时间线 ---------- */
.page-about .about-sec--timeline {
  background: var(--ink-950);
  overflow: hidden;
}

.page-about .about-tl__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.page-about .about-tl__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
  filter: saturate(0.8);
}

.page-about .about-sec--timeline > *:not(.about-tl__bg) {
  position: relative;
  z-index: 1;
}

.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--flame-500), rgba(255, 75, 31, 0.15));
}

.page-about .tl-item {
  position: relative;
  padding: 18px 0 18px 34px;
  border-bottom: var(--about-line-soft);
  transition: background var(--dur-hover) linear;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 26px;
  width: 10px;
  height: 10px;
  background: var(--ink-950);
  border: 2px solid var(--flame-500);
  transform: rotate(45deg);
  transition: background var(--dur-hover) linear, border-color var(--dur-hover) linear;
}

.page-about .tl-item:nth-child(odd) {
  background: rgba(27, 39, 64, 0.42);
}

.page-about .tl-item:hover,
.page-about .tl-item:focus-within {
  background: rgba(255, 75, 31, 0.1);
}

.page-about .tl-item:hover::before,
.page-about .tl-item:focus-within::before {
  background: var(--signal-400);
  border-color: var(--signal-400);
}

.page-about .tl-year {
  margin: 0 0 6px;
  font-family: var(--font-data);
  font-size: 20px;
  letter-spacing: 0.08em;
  color: var(--signal-400);
  transition: color var(--dur-hover) linear;
}

.page-about .tl-item:hover .tl-year {
  color: var(--chalk-050);
}

.page-about .tl-body p {
  margin: 0;
}

.page-about .about-tl__next {
  margin-top: 24px;
  font-size: 15px;
  color: var(--steel-500) !important;
}

/* ---------- 合作 ---------- */
.page-about .about-sec--partners {
  background: var(--ink-800);
}

.page-about .partner-grid {
  display: grid;
  border-top: var(--about-line);
}

.page-about .partner-cell {
  padding: 22px 0;
  border-bottom: var(--about-line);
  transition: border-color var(--dur-hover) linear;
}

.page-about .partner-cell:hover {
  border-bottom-color: var(--flame-500);
}

.page-about .partner-num {
  margin: 0;
  font-family: var(--font-data);
  font-size: clamp(40px, 8vw, 72px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--signal-400);
}

.page-about .partner-cell:nth-child(2) .partner-num {
  color: var(--flame-500);
}

.page-about .partner-cell:nth-child(3) .partner-num {
  color: var(--alert-450);
}

.page-about .partner-cell h3 {
  margin-top: 10px;
}

.page-about .about-partners__cta {
  margin-top: 22px;
  font-size: 15px;
  color: var(--steel-500) !important;
}

/* ---------- 服务范围 ---------- */
.page-about .about-sec--reach {
  background: linear-gradient(160deg, var(--ink-950) 0%, var(--ink-700) 100%);
}

.page-about .about-reach {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .about-reach .btn {
  margin-top: 8px;
}

/* ---------- 收尾 ---------- */
.page-about .about-close {
  padding: var(--about-pad) var(--gutter);
  background:
    repeating-linear-gradient(135deg, rgba(255, 75, 31, 0.08) 0 2px, transparent 2px 14px),
    var(--ink-800);
  border-top: 2px solid var(--flame-500);
}

.page-about .about-close__kicker {
  margin: 0 0 10px !important;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--flame-500) !important;
}

.page-about .about-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 720px) {
  .page-about .about-cols {
    grid-template-columns: 1fr 1fr;
  }

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

  .page-about .partner-cell {
    padding: 26px 22px 26px 0;
    border-bottom: var(--about-line);
    border-right: var(--about-line-soft);
  }

  .page-about .partner-cell:last-child {
    padding-right: 0;
    border-right: 0;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .about-hero__years {
    flex-direction: column;
    gap: 34px;
    border-top: 0;
    border-left: var(--about-line);
    padding: 8px 0 8px 12px;
    writing-mode: vertical-rl;
    height: 100%;
  }

  .page-about .about-crew {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    align-items: start;
  }

  .page-about .about-reach {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
  }

  .page-about .tl {
    display: grid;
    gap: 0;
  }

  .page-about .tl-item {
    display: grid;
    grid-template-columns: 160px minmax(0, 1fr);
    gap: 28px;
    padding: 24px 24px 24px 40px;
    align-items: start;
  }

  .page-about .tl-year {
    margin: 0;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    font-size: 24px;
    justify-self: start;
  }

  .page-about .about-close h2 {
    font-size: clamp(32px, 3.4vw, 52px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .crew-board__cell,
  .page-about .tl-item,
  .page-about .partner-cell,
  .page-about .tl-year {
    transition: none;
  }
}
<<<END>>>