.page-about {
  --about-gap: clamp(24px, 5vw, 56px);
  --about-h2: clamp(1.45rem, 3.4vw, 2.35rem);
  display: block;
  background: var(--ink-900);
  color: var(--text);
  overflow-x: hidden;
}

.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding-top: calc(var(--header-h) * 0.62);
  padding-bottom: 4px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .about-crumb a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--teal);
}

.page-about .about-crumb .breadcrumb__item[aria-current="page"] {
  color: var(--text);
}

.page-about .about-crumb .breadcrumb__sep {
  color: var(--line);
}

.page-about .about-h2 {
  font-family: var(--font-display);
  font-size: var(--about-h2);
  line-height: 1.22;
  letter-spacing: -0.015em;
  font-weight: 800;
  margin: 14px 0 18px;
  color: var(--text);
}

.page-about .about-p {
  margin: 0 0 16px;
  max-width: 68ch;
  color: var(--muted);
  font-size: clamp(14px, 1.55vw, 16px);
  line-height: 1.78;
}

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

.page-about .about-head {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-inline-link {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid var(--teal-deep);
  padding-bottom: 1px;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--teal-bright);
  border-color: var(--teal-bright);
}

/* 首屏 */
.page-about .about-hero {
  padding: 10px 0 clamp(36px, 7vw, 88px);
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: center;
}

.page-about .about-hero__kicker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin: 0 0 18px;
}

.page-about .about-hero__kicker .u-annot {
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.22em;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 8vw, 4.4rem);
  line-height: 1.03;
  letter-spacing: -0.03em;
  font-weight: 800;
  margin: 0 0 20px;
  color: var(--text);
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 46ch;
  color: var(--muted);
  font-size: clamp(14px, 1.7vw, 17px);
  line-height: 1.8;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__media {
  position: relative;
  isolation: isolate;
  margin: 0;
}

.page-about .about-hero__media::before {
  content: "";
  position: absolute;
  inset: 14px -10px -14px 10px;
  border: 1px solid var(--line);
  background: linear-gradient(140deg, rgba(35, 201, 176, 0.12), rgba(255, 106, 61, 0.06) 55%, transparent 80%);
  z-index: -1;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  border: 1px solid var(--line-soft);
  filter: saturate(1.05) contrast(1.04);
}

.page-about .about-hero__caption {
  margin-top: 12px;
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--muted);
}

/* 通用分区 */
.page-about .about-sec {
  padding-block: clamp(40px, 7vw, 96px);
  border-top: 1px solid var(--line-soft);
}

/* 起点 */
.page-about .about-origin__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

.page-about .about-annot {
  margin: 0;
  color: var(--teal-deep);
  font-size: 10px;
  letter-spacing: 0.24em;
}

.page-about .about-annot--vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  display: none;
}

.page-about .about-check {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-check li {
  position: relative;
  padding-left: 22px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.7;
}

.page-about .about-check li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 9px;
  width: 8px;
  height: 8px;
  border-left: 1px solid var(--teal);
  border-bottom: 1px solid var(--teal);
  transform: rotate(-45deg);
}

/* 团队 */
.page-about .about-team__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .about-roles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-role {
  position: relative;
  padding: 18px 18px 18px 20px;
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--teal-deep);
  background: linear-gradient(150deg, rgba(14, 34, 48, 0.9), rgba(7, 19, 31, 0.55));
  transition: border-left-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .about-role:hover {
  border-left-color: var(--teal);
}

.page-about .about-role__coord {
  display: block;
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--amber);
}

.page-about .about-role h3 {
  margin: 8px 0 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.02em;
}

.page-about .about-role p {
  margin: 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.72;
}

.page-about .about-team__media {
  margin: 0;
  position: relative;
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid var(--line-soft);
}

.page-about .about-team__cap {
  display: block;
  margin-top: 10px;
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

/* 合作生态 */
.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-pcard {
  padding: 24px 20px 22px;
  background: var(--ink-800);
  border: 1px solid var(--line-soft);
  box-shadow: var(--shadow-soft);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-about .about-pcard:hover {
  transform: translateY(-3px);
  border-color: var(--line);
}

.page-about .about-pcard__num {
  display: block;
  font-size: clamp(2rem, 5vw, 2.9rem);
  font-weight: 700;
  line-height: 1;
  color: var(--teal);
  letter-spacing: -0.01em;
}

.page-about .about-pcard h3 {
  margin: 12px 0 10px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-pcard p {
  margin: 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.74;
}

.page-about .about-pcard--accent {
  background: linear-gradient(160deg, rgba(255, 106, 61, 0.14), rgba(14, 34, 48, 0.95) 65%);
  border-color: rgba(255, 106, 61, 0.32);
}

.page-about .about-pcard--accent .about-pcard__num {
  color: var(--orange);
}

/* 索引方法 */
.page-about .about-method__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3.5vw, 40px);
}

.page-about .about-legend {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-legend__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-soft);
  transition: background-color 0.2s var(--ease);
}

.page-about .about-legend__key {
  flex: 0 0 34px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--teal);
}

.page-about .about-legend__name {
  flex: 0 0 auto;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-legend__desc {
  flex: 1 1 220px;
  margin: 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.72;
}

.page-about .about-method__note {
  padding: 24px 20px;
  border: 1px solid var(--line-soft);
  background: linear-gradient(160deg, rgba(11, 107, 99, 0.22), rgba(7, 19, 31, 0.4) 70%);
}

.page-about .about-method__note h3 {
  margin: 0 0 12px;
  font-size: 15px;
  font-weight: 700;
  color: var(--teal-bright);
  letter-spacing: 0.02em;
}

.page-about .about-method__note p {
  margin: 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.78;
}

/* 文化 */
.page-about .about-culture__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: center;
}

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

.page-about .about-culture__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  clip-path: polygon(0 6%, 100% 0, 100% 94%, 0 100%);
}

/* 发展历程 */
.page-about .about-tl {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 10px;
  left: 5px;
  width: 1px;
  background: linear-gradient(180deg, var(--teal), var(--line) 45%, var(--line-soft));
}

.page-about .about-tl__item {
  position: relative;
  padding: 0 0 32px 34px;
}

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

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 1px solid var(--teal);
  box-shadow: 0 0 0 4px rgba(35, 201, 176, 0.1);
}

.page-about .about-tl__phase {
  display: block;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--amber);
}

.page-about .about-tl__title {
  margin: 8px 0 8px;
  font-size: clamp(15px, 2vw, 18px);
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.01em;
}

.page-about .about-tl__desc {
  margin: 0;
  max-width: 58ch;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.76;
}

/* 收束 */
.page-about .about-close {
  border-top: 1px solid var(--line);
}

.page-about .about-close__card {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  padding: clamp(24px, 4.5vw, 48px);
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 92% 6%, rgba(35, 201, 176, 0.16), transparent 55%),
    linear-gradient(155deg, var(--ink-700), var(--ink-850) 78%);
}

.page-about .about-close__links {
  display: grid;
  gap: 2px;
  margin-top: 26px;
}

.page-about .about-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  border: 1px solid var(--line-soft);
  color: var(--text);
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.5;
  background: rgba(7, 19, 31, 0.4);
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  border-color: var(--teal);
  color: var(--teal-bright);
  background: rgba(11, 107, 99, 0.18);
}

.page-about .about-link__arrow {
  color: var(--orange);
  font-size: 14px;
  flex: 0 0 auto;
}

.page-about .about-contact {
  margin: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-contact__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  justify-content: space-between;
  align-items: baseline;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-contact__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .about-contact__value {
  margin: 0;
  font-size: 14px;
  color: var(--text);
  word-break: break-word;
}

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

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

  .page-about .about-pcard--accent {
    transform: translateY(14px);
  }

  .page-about .about-pcard--accent:hover {
    transform: translateY(10px);
  }

  .page-about .about-legend__row {
    padding: 17px 10px;
  }

  .page-about .about-legend__row:hover {
    background: rgba(35, 201, 176, 0.05);
  }
}

/* 桌面 */
@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-origin__inner {
    grid-template-columns: 54px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }

  .page-about .about-annot--vertical {
    display: block;
    padding-top: 6px;
  }

  .page-about .about-team__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    align-items: start;
    gap: clamp(32px, 4.5vw, 64px);
  }

  .page-about .about-team__media {
    margin-top: 34px;
  }

  .page-about .about-method__body {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.8fr);
    align-items: start;
  }

  .page-about .about-culture__inner {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: clamp(32px, 5vw, 68px);
  }

  .page-about .about-tl {
    padding-left: 8px;
  }

  .page-about .about-tl__item {
    padding-left: 46px;
    padding-bottom: 38px;
  }

  .page-about .about-close__card {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-pcard,
  .page-about .about-link,
  .page-about .about-role,
  .page-about .about-legend__row {
    transition: none;
  }
}
<<<END>>>