.page-about {
  --about-line: 1px solid rgba(42, 74, 80, 0.6);
  --about-line-light: 1px solid rgba(42, 74, 80, 0.24);
  background: var(--c-ink);
  color: var(--c-fog);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(20px, 4vw, 38px) 0 clamp(34px, 5vw, 64px);
  border-bottom: var(--about-line);
  background:
    radial-gradient(80% 120% at 92% -20%, rgba(20, 80, 90, 0.95), rgba(20, 80, 90, 0) 62%),
    linear-gradient(165deg, var(--c-deep) 0%, var(--c-ink) 58%, var(--c-ink) 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.7;
  background-image:
    linear-gradient(104deg, transparent 0 50%, rgba(255, 106, 42, 0.8) 50% 50.22%, transparent 50.22%),
    linear-gradient(104deg, transparent 0 63%, rgba(143, 179, 184, 0.3) 63% 63.12%, transparent 63.12%),
    linear-gradient(104deg, transparent 0 79%, rgba(143, 179, 184, 0.16) 79% 79.1%, transparent 79.1%);
}

.page-about .about-hero .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(18px, 3vw, 30px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-mist);
}

.page-about .about-hero .breadcrumbs a {
  color: var(--c-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-hero .breadcrumbs a:hover {
  color: var(--c-fog);
  border-bottom-color: var(--c-track);
}

.page-about .breadcrumbs__sep {
  opacity: 0.5;
}

.page-about .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-track);
}

.page-about .about-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 7vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.04em;
  color: var(--c-fog);
}

.page-about .about-hero__lede {
  max-width: 58ch;
  margin: 0 0 clamp(24px, 3.4vw, 38px);
  font-size: clamp(15px, 1.6vw, 17.5px);
  line-height: 1.78;
  color: rgba(234, 243, 242, 0.82);
}

.page-about .about-hero__strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  max-width: 780px;
  background: rgba(42, 74, 80, 0.75);
  border: 1px solid rgba(42, 74, 80, 0.75);
}

.page-about .about-hero__strip .data-strip__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  background: rgba(6, 26, 31, 0.72);
}

.page-about .data-strip__num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.4vw, 28px);
  letter-spacing: -0.02em;
  color: var(--c-fog);
}

.page-about .data-strip__key {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-mist);
}

@media (min-width: 720px) {
  .page-about .about-hero__strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 版式骨架 ---------- */
.page-about .about-layout {
  display: grid;
  gap: clamp(24px, 3.5vw, 40px);
  padding: clamp(30px, 5vw, 64px) 0 clamp(48px, 7vw, 96px);
}

.page-about .about-main {
  min-width: 0;
}

.page-about .about-toc {
  border-left: 2px solid rgba(255, 106, 42, 0.55);
  padding-left: 14px;
}

.page-about .about-toc__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--c-mist);
}

.page-about .about-toc__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-toc__list a {
  display: inline-block;
  padding: 2px 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  text-decoration: none;
  color: rgba(234, 243, 242, 0.7);
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-toc__list a:hover {
  color: var(--c-track);
}

.page-about .about-toc__list a[aria-current="true"] {
  color: var(--c-track);
  border-bottom-color: var(--c-track);
}

@media (min-width: 960px) {
  .page-about .about-layout {
    grid-template-columns: 216px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: 104px;
  }

  .page-about .about-toc__list {
    flex-direction: column;
    gap: 2px;
  }

  .page-about .about-toc__list a {
    display: block;
    padding: 7px 0 7px 12px;
    border-bottom: none;
    border-left: 1px solid rgba(42, 74, 80, 0.7);
  }

  .page-about .about-toc__list a[aria-current="true"] {
    border-left-color: var(--c-track);
    border-bottom: none;
  }

  .page-about .about-toc__list a:hover {
    border-left-color: var(--c-track);
  }
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  margin: 0 0 clamp(34px, 5vw, 62px);
}

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

.page-about .about-sec__head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

.page-about .about-sec__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--c-track);
}

.page-about .about-sec h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.24;
  letter-spacing: -0.03em;
  color: var(--c-fog);
}

.page-about .about-sec__lead {
  margin: 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: rgba(234, 243, 242, 0.78);
}

.page-about .about-sec--light {
  padding: clamp(20px, 3vw, 38px);
  background: var(--c-fog);
  color: var(--c-deep);
  border: var(--about-line-light);
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.26);
}

.page-about .about-sec--light h2 {
  color: var(--c-deep);
}

.page-about .about-sec--light .about-sec__kicker {
  color: var(--c-track-deep);
}

.page-about .about-sec--light .about-sec__lead {
  color: rgba(11, 47, 54, 0.8);
}

.page-about .about-sec--panel {
  padding: clamp(20px, 3vw, 38px);
  border: var(--about-line);
  background: linear-gradient(155deg, var(--c-tide) 0%, var(--c-deep) 62%, var(--c-ink) 100%);
}

.page-about .about-sec--gold {
  padding: clamp(20px, 3vw, 34px) 0 0;
  border-top: 1px solid rgba(216, 169, 74, 0.4);
}

.page-about .about-sec--start {
  padding: clamp(20px, 3vw, 34px);
  border: var(--about-line);
  background: rgba(20, 80, 90, 0.24);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0 0 clamp(18px, 2.6vw, 26px);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--c-mist);
}

.page-about .about-sec--light .about-figure figcaption {
  color: rgba(11, 47, 54, 0.62);
}

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

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, rgba(255, 106, 42, 0.75), rgba(143, 179, 184, 0.3));
}

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

.page-about .tl__item + .tl__item {
  margin-top: 12px;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 18px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--c-ink);
  border: 1px solid var(--c-track);
  transition: background 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .tl__item:hover::before,
.page-about .tl__item:focus-within::before {
  background: var(--c-track);
  box-shadow: 0 0 0 4px rgba(255, 106, 42, 0.18);
}

.page-about .tl__sum {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding: 12px 14px;
  cursor: pointer;
  list-style: none;
  border: var(--about-line);
  background: rgba(20, 80, 90, 0.28);
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

.page-about .tl__sum:hover {
  background: rgba(20, 80, 90, 0.5);
  border-color: rgba(255, 106, 42, 0.55);
}

.page-about .tl__sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--c-track);
}

.page-about .tl__node[open] > .tl__sum::after {
  content: "–";
}

.page-about .tl__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--c-track);
}

.page-about .tl__name {
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c-fog);
}

.page-about .tl__body {
  margin: 10px 0 0 14px;
  padding: 2px 0 2px 14px;
  border-left: 1px solid rgba(42, 74, 80, 0.8);
}

.page-about .tl__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(234, 243, 242, 0.76);
}

/* ---------- 团队 ---------- */
.page-about .team-top {
  display: grid;
  gap: 18px;
  margin-bottom: clamp(18px, 2.6vw, 26px);
}

.page-about .team-top__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(11, 47, 54, 0.85);
}

@media (min-width: 900px) {
  .page-about .team-top {
    grid-template-columns: 1.05fr 1fr;
    align-items: start;
    gap: clamp(20px, 3vw, 34px);
  }
}

.page-about .roles {
  display: grid;
  gap: 10px;
}

.page-about .role {
  position: relative;
  padding: 16px 16px 18px;
  background: rgba(255, 255, 255, 0.72);
  border: var(--about-line-light);
  border-top: 2px solid var(--c-track);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .role:hover,
.page-about .role:focus-within {
  transform: translateY(-2px);
  border-color: rgba(184, 70, 22, 0.5);
  box-shadow: 0 10px 22px rgba(6, 26, 31, 0.16);
}

.page-about .role__num {
  display: block;
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 22px;
  letter-spacing: -0.02em;
  color: var(--c-track-deep);
}

.page-about .role h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c-deep);
}

.page-about .role__note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.68;
  color: rgba(11, 47, 54, 0.72);
}

@media (min-width: 640px) {
  .page-about .roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 服务范围 ---------- */
.page-about .service-grid {
  display: grid;
  gap: 1px;
  margin-bottom: clamp(18px, 2.6vw, 26px);
  background: rgba(42, 74, 80, 0.7);
  border: 1px solid rgba(42, 74, 80, 0.7);
}

.page-about .service-grid__item {
  display: grid;
  gap: 6px;
  padding: 16px;
  background: rgba(6, 26, 31, 0.62);
}

.page-about .service-grid__item h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c-fog);
}

.page-about .service-grid__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(234, 243, 242, 0.74);
}

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

.page-about .region-figure {
  margin: 0;
}

.page-about .region-figure svg {
  display: block;
  width: 100%;
  height: 96px;
  max-width: 520px;
}

.page-about .region-figure figcaption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--c-mist);
}

/* ---------- 合作与质量 ---------- */
.page-about .partner-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: clamp(18px, 2.6vw, 26px);
}

.page-about .partner-stat {
  display: grid;
  gap: 4px;
  padding-top: 10px;
  border-top: 2px solid var(--c-track);
}

.page-about .partner-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 30px);
  letter-spacing: -0.02em;
  color: var(--c-deep);
}

.page-about .partner-stat__key {
  font-size: 12.5px;
  line-height: 1.5;
  color: rgba(11, 47, 54, 0.72);
}

.page-about .flow {
  display: grid;
  gap: 10px;
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  padding: 0;
  list-style: none;
  counter-reset: aboutflow;
}

.page-about .flow li {
  position: relative;
  padding-left: 34px;
  font-size: 14.5px;
  line-height: 1.68;
  color: rgba(11, 47, 54, 0.82);
}

.page-about .flow li::before {
  counter-increment: aboutflow;
  content: "0" counter(aboutflow);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-track-deep);
}

/* ---------- 荣誉 ---------- */
.page-about .honor-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .honor {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(216, 169, 74, 0.34);
}

.page-about .honor__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--c-gold);
}

.page-about .honor h3 {
  margin: 0 0 5px;
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c-fog);
}

.page-about .honor p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(234, 243, 242, 0.72);
}

/* ---------- 入口 ---------- */
.page-about .start-links {
  display: grid;
  gap: 10px;
  margin-bottom: 18px;
}

.page-about .start-link {
  display: grid;
  gap: 4px;
  padding: 16px;
  text-decoration: none;
  color: var(--c-fog);
  border: var(--about-line);
  background: rgba(20, 80, 90, 0.22);
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .start-link:hover,
.page-about .start-link:focus-visible {
  background: rgba(255, 106, 42, 0.12);
  border-color: rgba(255, 106, 42, 0.7);
  transform: translateY(-2px);
}

.page-about .start-link__label {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .start-link__note {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--c-mist);
}

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

.page-about .about-sec--start .aside-note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--c-mist);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .role,
  .page-about .start-link,
  .page-about .tl__sum {
    transition: none;
  }

  .page-about .role:hover,
  .page-about .start-link:hover {
    transform: none;
  }
}
<<<END>>>