.page-about {
  background: var(--paper);
  color: var(--char);
}

.page-about [id] {
  scroll-margin-top: 88px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--navy);
  color: var(--paper);
  padding-top: clamp(26px, 4vw, 46px);
}

.page-about .about-hero__band {
  position: absolute;
  top: -22%;
  right: -12%;
  width: 80%;
  height: 155%;
  background: linear-gradient(158deg, var(--ochre) 0%, var(--ochre-deep) 46%, rgba(20, 32, 46, 0) 84%);
  clip-path: polygon(48% 0, 100% 0, 100% 100%, 0 74%);
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  padding-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-hero .breadcrumb__list,
.page-about .about-hero .breadcrumb,
.page-about .about-hero .breadcrumb a {
  color: rgba(243, 235, 221, 0.6);
}

.page-about .about-hero .breadcrumb a:hover {
  color: var(--gold-lite);
}

.page-about .about-hero .eyebrow {
  color: var(--gold);
}

.page-about .about-hero__title {
  margin: clamp(18px, 3vw, 30px) 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(33px, 6.6vw, 80px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  max-width: 16em;
}

.page-about .about-hero__title span {
  color: var(--gold-lite);
}

.page-about .about-hero__lede {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(243, 235, 221, 0.8);
}

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

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: clamp(170px, 32vw, 400px);
  object-fit: cover;
}

/* ---------- 主体：侧栏 + 章节 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  padding-block: clamp(34px, 6vw, 70px);
}

.page-about .about-rail {
  display: none;
}

.page-about .about-rail__label {
  margin: 0 0 8px;
  padding-left: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--stone);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  border-left: 1px solid var(--hairline);
}

.page-about .about-rail__list li + li {
  margin-top: 1px;
}

.page-about .about-rail__list a {
  display: block;
  margin-left: -1px;
  padding: 5px 0 5px 14px;
  border-left: 1px solid transparent;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--stone);
  text-decoration: none;
  transition: color 240ms var(--ease), border-color 240ms var(--ease);
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  color: var(--ochre);
  border-left-color: var(--ochre);
}

@media (min-width: 940px) {
  .page-about .about-body {
    grid-template-columns: 148px minmax(0, 1fr);
    gap: clamp(36px, 4.5vw, 68px);
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: 88px;
    align-self: start;
  }
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  padding-block: clamp(28px, 4.4vw, 54px);
  border-top: 1px solid var(--hairline);
}

.page-about .about-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-chapter__head {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px 14px;
  margin-bottom: clamp(20px, 3vw, 32px);
}

@media (min-width: 720px) {
  .page-about .about-chapter__head {
    grid-template-columns: 68px minmax(0, 1fr);
    gap: 18px 26px;
  }
}

.page-about .about-chapter__num {
  padding-top: 9px;
  border-top: 1px solid var(--gold);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .about-chapter__head .eyebrow {
  margin-bottom: 6px;
}

.page-about .about-chapter__head .section-title {
  margin: 0;
  line-height: 1.22;
}

/* ---------- 沿革时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 10px 16px;
  padding: 20px 0;
  border-top: 1px dashed var(--hairline);
}

.page-about .about-timeline__item:first-child {
  border-top: 1px solid var(--hairline);
}

@media (min-width: 760px) {
  .page-about .about-timeline__item {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 12px 32px;
    padding: 24px 0;
  }
}

.page-about .about-timeline__year {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ochre);
}

.page-about .about-timeline__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(17px, 2.2vw, 21px);
  line-height: 1.45;
}

.page-about .about-timeline__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(26, 23, 20, 0.76);
}

/* ---------- 服务版图 ---------- */
.page-about .about-coverage__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3.2vw, 36px);
}

@media (min-width: 860px) {
  .page-about .about-coverage__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }
}

.page-about .about-map-wrap {
  margin: 0;
}

.page-about .about-map {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--hairline);
  background: var(--paper-2);
}

.page-about .about-map__line {
  stroke: var(--stone);
}

.page-about .about-map__link {
  fill: none;
  stroke: var(--gold);
  stroke-width: 1;
  opacity: 0.6;
}

.page-about .about-map__node {
  fill: var(--gold);
}

.page-about .about-map__node--core {
  fill: var(--ochre);
}

.page-about .about-map__cap {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--stone);
}

.page-about .about-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
}

.page-about .about-stats li {
  background: var(--paper-2);
  padding: 18px 16px;
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(27px, 3.8vw, 38px);
  line-height: 1;
  color: var(--ochre);
  letter-spacing: -0.01em;
}

.page-about .about-stats__label {
  display: block;
  margin-top: 9px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--stone);
}

.page-about .about-coverage__note {
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(26, 23, 20, 0.78);
}

.page-about .about-coverage__figure {
  margin: clamp(20px, 3.2vw, 34px) 0 0;
}

.page-about .about-coverage__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--hairline);
}

/* ---------- 编辑与客服 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3.2vw, 40px);
}

@media (min-width: 860px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
    align-items: start;
  }
}

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

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

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-team__list li {
  border-left: 2px solid var(--gold);
  padding: 2px 0 2px 16px;
}

.page-about .about-team__list li + li {
  margin-top: 22px;
}

.page-about .about-team__list h3 {
  margin: 0 0 7px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(16px, 2vw, 18px);
  line-height: 1.5;
}

.page-about .about-team__list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(26, 23, 20, 0.76);
}

.page-about .about-team__list a,
.page-about .about-code__item a {
  color: var(--ochre);
  text-decoration: none;
  border-bottom: 1px solid rgba(150, 59, 44, 0.35);
}

.page-about .about-team__list a:hover,
.page-about .about-code__item a:hover {
  color: var(--ochre-deep);
  border-bottom-color: var(--ochre-deep);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3.2vw, 40px);
}

@media (min-width: 860px) {
  .page-about .about-eco {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
  }
}

.page-about .about-eco p {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(26, 23, 20, 0.78);
}

.page-about .about-eco__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--hairline);
}

.page-about .about-eco__list li {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 10px 16px;
  padding: 15px 0;
  border-bottom: 1px solid var(--hairline-soft);
  align-items: baseline;
}

.page-about .about-eco__list strong {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--ochre);
}

.page-about .about-eco__list span {
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(26, 23, 20, 0.78);
}

/* ---------- 服务标准 ---------- */
.page-about .about-code {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-code__item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 10px 16px;
  padding: clamp(18px, 2.6vw, 26px) 0;
  border-top: 1px solid var(--hairline);
}

.page-about .about-code__item:first-child {
  border-top: 1px solid var(--hairline);
}

@media (max-width: 759px) {
  .page-about .about-code__item h3,
  .page-about .about-code__item p {
    grid-column: 2;
  }
}

@media (min-width: 760px) {
  .page-about .about-code__item {
    grid-template-columns: 76px minmax(0, 0.95fr) minmax(0, 1.25fr);
    gap: 10px 28px;
    align-items: start;
  }
}

.page-about .about-code__num {
  font-family: var(--font-display);
  font-size: clamp(23px, 2.9vw, 31px);
  line-height: 1;
  color: var(--gold);
}

.page-about .about-code__item h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(16px, 1.9vw, 19px);
  line-height: 1.45;
}

.page-about .about-code__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(26, 23, 20, 0.76);
}

/* ---------- 结尾引导 ---------- */
.page-about .about-cta {
  background: var(--navy);
  color: var(--paper);
  padding-block: clamp(36px, 6vw, 70px);
  margin-top: clamp(32px, 5vw, 60px);
}

.page-about .about-cta__inner {
  position: relative;
}

.page-about .about-cta h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(23px, 3.4vw, 35px);
  line-height: 1.24;
  color: var(--paper);
}

.page-about .about-cta p {
  margin: 0 0 24px;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(243, 235, 221, 0.78);
}

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

.page-about .about-cta .btn {
  background: var(--ochre);
  color: var(--paper);
}

.page-about .about-cta .btn--line {
  background: transparent;
  color: var(--gold-lite);
  border: 1px solid rgba(201, 151, 87, 0.55);
}

.page-about .about-cta .btn--line:hover {
  border-color: var(--gold-lite);
}
<<<END>>>