.page-about {
  --about-hair: 1px solid var(--edge);
  --about-rail: 152px;
  --about-body-text: rgba(36, 26, 20, .84);
  --about-body-quiet: rgba(36, 26, 20, .66);
  background: var(--ink-deep);
  color: var(--cream);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

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

.page-about figure {
  margin: 0;
}

.page-about figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  line-height: 1.6;
  color: var(--teal);
}

/* ---------- 首屏 ---------- */
.page-about .about-mast {
  position: relative;
  overflow: hidden;
  padding-block: clamp(12px, 2.4vw, 26px) clamp(34px, 5vw, 62px);
  border-bottom: var(--about-hair);
  background:
    linear-gradient(118deg, rgba(11, 34, 57, .97) 0%, rgba(6, 19, 34, .99) 58%, rgba(30, 58, 86, .78) 100%);
}

.page-about .about-mast::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(118deg, rgba(30, 58, 86, .62) 0 1px, transparent 1px 52px);
  opacity: .5;
  pointer-events: none;
}

.page-about .about-mast > .container {
  position: relative;
  z-index: 1;
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0 0 clamp(18px, 3vw, 32px);
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
}

.page-about .breadcrumb li + li::before {
  content: "／";
  margin-right: 6px;
  color: var(--edge);
}

.page-about .breadcrumb a {
  color: var(--slate);
  text-decoration: none;
  transition: color .18s var(--ease);
}

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

.page-about .breadcrumb [aria-current="page"] {
  color: var(--cream);
}

.page-about .mast-grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .mast-kicker {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-about .mast-lead h1 {
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(1.95rem, 5.4vw, 4.1rem);
  line-height: 1.08;
  letter-spacing: .01em;
  color: var(--cream);
  max-width: 20em;
}

.page-about .mast-lead h1 em {
  display: inline-block;
  font-style: normal;
  font-weight: 900;
  letter-spacing: -.015em;
  color: var(--orange);
}

.page-about .mast-lede {
  margin: 0;
  max-width: 44em;
  font-size: clamp(.95rem, 1.6vw, 1.0625rem);
  line-height: 1.8;
  color: rgba(245, 239, 227, .82);
}

.page-about .mast-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--about-hair);
  border-left: var(--about-hair);
}

.page-about .mast-figures li {
  padding: 14px 12px 16px;
  border-right: var(--about-hair);
  border-bottom: var(--about-hair);
}

.page-about .fig-num {
  display: block;
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  letter-spacing: .02em;
  line-height: 1.2;
  color: var(--cyan);
}

.page-about .fig-label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.55;
  color: var(--slate);
}

/* ---------- 纸面正文 ---------- */
.page-about .about-body {
  padding-block: clamp(30px, 5vw, 64px) clamp(44px, 6vw, 84px);
  background: var(--cream);
  color: var(--brown);
}

.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 40px);
}

.page-about .rail {
  border-bottom: var(--about-hair);
  padding-bottom: 10px;
}

.page-about .rail-label {
  margin: 0 0 8px;
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--burnt);
}

.page-about .rail-list {
  display: flex;
  gap: 14px;
  margin: 0;
  padding: 0 0 2px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .rail-link {
  display: block;
  padding-bottom: 4px;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--about-body-quiet);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .rail-link:hover {
  color: var(--burnt);
  border-bottom-color: var(--orange);
}

.page-about .rail-link[aria-current="location"] {
  color: var(--teal);
  border-bottom-color: var(--teal);
}

.page-about .rail-link:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

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

.page-about .about-section {
  padding-top: clamp(18px, 2.6vw, 26px);
  margin-bottom: clamp(38px, 5.4vw, 68px);
  border-top: var(--about-hair);
}

.page-about .about-section:first-child {
  margin-top: 0;
}

.page-about .section-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

.page-about .section-head .plate {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
}

.page-about .section-head .plate-num {
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--orange);
}

.page-about .section-head .plate-tag {
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--teal);
}

.page-about .section-head .plate-tag::before {
  content: "";
  display: inline-block;
  width: 22px;
  height: 1px;
  margin-right: 10px;
  vertical-align: middle;
  background: var(--edge);
}

.page-about .about-section h2 {
  margin: 0;
  max-width: 18em;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(1.5rem, 3.4vw, 2.45rem);
  line-height: 1.2;
  letter-spacing: .01em;
  color: var(--brown);
}

.page-about .section-note {
  margin: 0;
  max-width: 52ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-body-quiet);
}

.page-about .about-section p {
  max-width: var(--reading);
  color: var(--about-body-text);
}

/* ---------- 01 主张 ---------- */
.page-about .stance-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
}

.page-about .stance-text p {
  margin: 0 0 1em;
}

.page-about .manifesto {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding-left: 16px;
  border-left: 3px solid var(--orange);
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(1.35rem, 3.4vw, 2.3rem);
  line-height: 1.22;
  letter-spacing: .01em;
  color: var(--brown);
}

.page-about .stance-figure img {
  width: 100%;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  border: var(--about-hair);
}

/* ---------- 02 时间轴 ---------- */
.page-about .axis-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .axis-item {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  grid-template-areas:
    "dot year"
    "dot card";
  column-gap: 12px;
  padding-bottom: 26px;
}

.page-about .axis-year {
  grid-area: year;
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--burnt);
  line-height: 1.4;
}

.page-about .axis-dot {
  grid-area: dot;
  position: relative;
}

.page-about .axis-dot::before {
  content: "";
  position: absolute;
  top: 16px;
  bottom: -26px;
  left: 50%;
  width: 1px;
  transform: translateX(-50%);
  background: var(--edge);
  opacity: .8;
}

.page-about .axis-item:last-child .axis-dot::before {
  display: none;
}

.page-about .axis-dot span {
  position: absolute;
  top: 6px;
  left: 50%;
  width: 9px;
  height: 9px;
  margin-left: -4.5px;
  border-radius: 50%;
  background: var(--orange);
  transition: transform .18s var(--ease), background-color .18s var(--ease), box-shadow .18s var(--ease);
}

.page-about .axis-card {
  grid-area: card;
  border-top: var(--about-hair);
  padding-top: 10px;
  transition: transform .18s var(--ease), border-color .18s var(--ease);
}

.page-about .axis-card h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1rem, 1.9vw, 1.15rem);
  line-height: 1.4;
  letter-spacing: .01em;
  color: var(--brown);
}

.page-about .axis-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-body-text);
}

.page-about .axis-item:hover .axis-dot span,
.page-about .axis-item:focus-within .axis-dot span {
  transform: scale(1.45);
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(63, 224, 200, .22);
}

.page-about .axis-item:hover .axis-card,
.page-about .axis-item:focus-within .axis-card {
  transform: translateX(3px);
  border-top-color: var(--orange);
}

.page-about .axis-figure {
  margin-top: clamp(20px, 3vw, 32px);
  padding-top: 12px;
  border-top: var(--about-hair);
}

.page-about .axis-figure img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 03 能力 ---------- */
.page-about .cap-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 26px);
}

.page-about .cap-col {
  padding-top: 12px;
  border-top: 2px solid var(--edge);
}

.page-about .cap-col-a {
  border-top-color: var(--orange);
}

.page-about .cap-col-b {
  border-top-color: var(--teal);
}

.page-about .cap-col-c {
  border-top-color: var(--edge);
}

.page-about .cap-index {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--burnt);
}

.page-about .cap-col h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  line-height: 1.35;
  color: var(--brown);
}

.page-about .cap-desc {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-body-text);
}

.page-about .cap-list {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
}

.page-about .cap-list li {
  padding: 6px 0;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--brown);
  border-bottom: 1px solid rgba(30, 58, 86, .22);
}

.page-about .cap-list li::before {
  content: "";
  display: inline-block;
  width: 12px;
  height: 1px;
  margin-right: 8px;
  vertical-align: middle;
  background: var(--orange);
}

.page-about .cap-link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--burnt);
  text-decoration: none;
  border-bottom: 1px solid var(--orange);
  padding-bottom: 2px;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .cap-link:hover {
  color: var(--teal);
  border-bottom-color: var(--teal);
}

.page-about .cap-link:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

/* ---------- 04 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
}

.page-about .team-text p {
  margin: 0 0 1em;
}

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

.page-about .team-figure img {
  width: 100%;
  max-width: 380px;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: var(--about-hair);
}

/* ---------- 05 资质 ---------- */
.page-about .cred-list {
  margin: 0 0 clamp(24px, 3.4vw, 36px);
  padding: 0;
}

.page-about .cred-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 14px 0;
  border-top: 1px solid rgba(30, 58, 86, .28);
}

.page-about .cred-item:last-child {
  border-bottom: 1px solid rgba(30, 58, 86, .28);
}

.page-about .cred-item dt {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.5;
  color: var(--brown);
}

.page-about .cred-item dt .mono {
  display: block;
  margin-bottom: 2px;
  font-weight: 400;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--teal);
}

.page-about .cred-item dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-body-text);
}

.page-about .eco {
  padding: clamp(16px, 2.4vw, 24px);
  background: rgba(11, 34, 57, .05);
  border-left: 3px solid var(--teal);
}

.page-about .eco-title {
  margin: 0 0 12px;
  font-size: 10.5px;
  letter-spacing: .2em;
  color: var(--teal);
}

.page-about .eco-map {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 14px;
}

.page-about .eco-map span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--teal);
  opacity: .82;
}

.page-about .eco-map span:nth-child(3n) {
  background: var(--orange);
  opacity: .95;
}

.page-about .eco-note {
  margin: 0;
  max-width: 54ch;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--about-body-text);
}

/* ---------- 06 前路 ---------- */
.page-about .next-list {
  margin: 0 0 clamp(26px, 3.6vw, 40px);
  padding: 0;
  list-style: none;
}

.page-about .next-list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  padding: 14px 0;
  border-top: 1px solid rgba(30, 58, 86, .28);
}

.page-about .next-list li:last-child {
  border-bottom: 1px solid rgba(30, 58, 86, .28);
}

.page-about .next-num {
  font-size: 11px;
  letter-spacing: .14em;
  line-height: 1.9;
  color: var(--orange);
}

.page-about .next-list h3 {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1rem, 1.9vw, 1.15rem);
  line-height: 1.4;
  color: var(--brown);
}

.page-about .next-list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-body-text);
}

.page-about .about-cta {
  padding: clamp(18px, 2.8vw, 28px);
  background: var(--night);
  border-left: 3px solid var(--orange);
}

.page-about .cta-lead {
  margin: 0 0 16px;
  max-width: 42em;
  font-size: clamp(.95rem, 1.6vw, 1.05rem);
  line-height: 1.75;
  color: rgba(245, 239, 227, .86);
}

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

.page-about .cta-btn {
  display: inline-block;
  padding: 11px 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%);
  transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .cta-btn-primary {
  background: var(--orange);
  color: var(--ink-deep);
  border: 1px solid var(--orange);
}

.page-about .cta-btn-primary:hover {
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .cta-btn-ghost {
  color: var(--cream);
  border: 1px solid var(--slate);
}

.page-about .cta-btn-ghost:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}

.page-about .cta-btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .cred-item {
    grid-template-columns: minmax(0, 15em) minmax(0, 1fr);
    gap: 18px;
    align-items: start;
  }
}

@media (min-width: 880px) {
  .page-about .mast-grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr);
    align-items: end;
  }

  .page-about .stance-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .65fr);
    align-items: start;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .axis-item {
    grid-template-columns: 86px 22px minmax(0, 1fr);
    grid-template-areas: "year dot card";
    column-gap: 18px;
    padding-bottom: 30px;
  }

  .page-about .axis-year {
    padding-top: 8px;
    text-align: right;
  }

  .page-about .axis-dot::before {
    bottom: -30px;
  }

  .page-about .cap-grid {
    grid-template-columns: 4fr 5fr 3fr;
    align-items: start;
  }

  .page-about .cap-col-b {
    margin-top: 24px;
  }

  .page-about .cap-col-c {
    margin-top: 48px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-shell {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-about .rail {
    border-bottom: 0;
    padding-bottom: 0;
    border-left: var(--about-hair);
    padding-left: 14px;
  }

  .page-about .rail-list {
    flex-direction: column;
    gap: 12px;
    overflow: visible;
  }

  .page-about .rail-link {
    white-space: normal;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .axis-card,
  .page-about .axis-dot span,
  .page-about .cta-btn,
  .page-about .cap-link,
  .page-about .rail-link {
    transition: none;
  }

  .page-about .axis-item:hover .axis-card,
  .page-about .axis-item:focus-within .axis-card {
    transform: none;
  }
}
<<<END>>>