.page-about {
  --about-cut: 16px;
  --about-track: rgba(18, 59, 93, 0.14);
  --about-mist-soft: rgba(220, 235, 230, 0.55);
  background: var(--warm);
  color: var(--ink);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-about .prose,
.page-about .lede,
.page-about p {
  max-width: 74ch;
}

/* ---------- 面包屑条 ---------- */
.page-about .about-top {
  background: var(--warm);
  border-bottom: 1px solid var(--line);
  padding-block: 0.85rem;
}
.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.82rem;
  color: var(--grey);
}
.page-about .breadcrumb__sep {
  color: var(--line-strong);
}
.page-about .breadcrumb__link {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible {
  border-bottom-color: var(--gold);
}
.page-about .breadcrumb__item[aria-current="page"] {
  color: var(--green);
  font-weight: 600;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(1.9rem, 4.5vw, 3.2rem) clamp(2.2rem, 5vw, 3.8rem);
  background:
    radial-gradient(120% 90% at 88% 6%, rgba(31, 122, 106, 0.16) 0%, rgba(31, 122, 106, 0) 58%),
    linear-gradient(158deg, var(--warm) 0%, var(--warm) 46%, var(--mist) 100%);
  overflow: hidden;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -8%;
  bottom: -34%;
  width: min(48vw, 440px);
  aspect-ratio: 1 / 1;
  border: 1px solid rgba(18, 59, 93, 0.1);
  transform: rotate(18deg);
  pointer-events: none;
}
.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  align-items: start;
  row-gap: clamp(1.4rem, 3vw, 2.2rem);
}
.page-about .about-hero__title {
  margin: 0.5rem 0 1rem;
  font-size: clamp(1.95rem, 6.2vw, 3.7rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--blue);
  font-weight: 800;
}
.page-about .about-hero__text .lede {
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-hero__jump {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: clamp(1.2rem, 2.6vw, 1.8rem) 0 0;
  padding: 0;
}
.page-about .about-hero__jump a {
  display: inline-block;
  padding: 0.42rem 0.85rem;
  font-size: 0.82rem;
  color: var(--blue);
  text-decoration: none;
  background: rgba(247, 243, 234, 0.86);
  border: 1px solid var(--line-strong);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: background 0.2s ease, color 0.2s ease;
}
.page-about .about-hero__jump a:hover,
.page-about .about-hero__jump a:focus-visible {
  background: var(--green);
  color: var(--warm);
  border-color: var(--green);
}

.page-about .about-hero__figure {
  margin: 0;
}
.page-about .about-hero__figure .figure__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}
.page-about .about-hero__figure .figure__caption {
  margin-top: 0.7rem;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--grey);
}

.page-about .about-hero__facts {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 0.8rem;
  margin: clamp(1.6rem, 3.4vw, 2.4rem) 0 0;
  padding: clamp(1.1rem, 2.4vw, 1.5rem) 0 0;
  border-top: 1px solid var(--line-strong);
}
.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding-left: 0.85rem;
  border-left: 3px solid var(--gold);
}
.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(1.45rem, 3.8vw, 2.1rem);
  line-height: 1.1;
  color: var(--blue);
  letter-spacing: -0.02em;
}
.page-about .about-fact__label {
  font-size: 0.8rem;
  color: var(--grey);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  padding-block: clamp(2.3rem, 5.4vw, 4.2rem);
  border-top: 1px solid var(--line);
  scroll-margin-top: 5rem;
}
.page-about .about-chapter--mist {
  background: var(--mist);
  border-top-color: rgba(18, 59, 93, 0.1);
}
.page-about .about-chapter--blue {
  background: var(--blue);
  border-top-color: rgba(247, 243, 234, 0.14);
}
.page-about .chapter-head {
  margin-bottom: clamp(1.4rem, 3vw, 2.2rem);
}
.page-about .chapter-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.5rem, 9vw, 5.2rem);
  line-height: 0.88;
  letter-spacing: -0.04em;
  color: rgba(18, 59, 93, 0.15);
}
.page-about .chapter-title {
  margin: 0.5rem 0 0;
  font-size: clamp(1.45rem, 3.6vw, 2.25rem);
  line-height: 1.3;
  font-weight: 800;
  color: var(--blue);
  letter-spacing: -0.01em;
}
.page-about .chapter-rule {
  width: 68px;
  height: 4px;
  margin-top: 0.85rem;
  background: var(--green);
}
.page-about .about-chapter--blue .chapter-num {
  color: rgba(247, 243, 234, 0.22);
}
.page-about .about-chapter--blue .chapter-title {
  color: var(--warm);
}
.page-about .about-chapter--blue .chapter-rule {
  background: var(--gold);
}

.page-about .about-split {
  row-gap: clamp(1.4rem, 3vw, 2.2rem);
}
.page-about .about-split .prose + .prose {
  margin-top: 1rem;
}

/* ---------- 说明牌 ---------- */
.page-about .about-note {
  background: rgba(247, 243, 234, 0.92);
  border: 1px solid var(--line);
  border-left: 4px solid var(--green);
  padding: clamp(1.1rem, 2.6vw, 1.6rem);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, var(--about-cut) 100%, 0 calc(100% - var(--about-cut)));
}
.page-about .about-note--sand {
  border-left-color: var(--gold);
  background: var(--sand);
}
.page-about .about-note__label {
  margin: 0 0 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green);
}
.page-about .about-note--sand .about-note__label {
  color: var(--signal);
}
.page-about .about-note p:not(.about-note__label) {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 版本时间线 ---------- */
.page-about .about-timeline__lede {
  margin-bottom: clamp(1.2rem, 2.6vw, 1.8rem);
}
.page-about .about-timeline .tablist {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}
.page-about .about-timeline .tab {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  letter-spacing: 0.04em;
  padding: 0.62rem 1.05rem;
  color: var(--blue);
  background: transparent;
  border: 1px solid var(--line-strong);
  cursor: pointer;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.page-about .about-timeline .tab:hover,
.page-about .about-timeline .tab:focus-visible {
  border-color: var(--green);
  color: var(--green);
}
.page-about .about-timeline .tab[aria-selected="true"] {
  background: var(--green);
  border-color: var(--green);
  color: var(--warm);
}

.page-about .about-timeline .tabpanel {
  margin-top: 1.1rem;
  padding: clamp(1.1rem, 3vw, 1.9rem);
  background: rgba(247, 243, 234, 0.72);
  border-left: 4px solid var(--gold);
}
.page-about .about-timeline .tabpanel:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 2px;
}
.page-about .about-panel__ver {
  margin: 0 0 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--signal);
}
.page-about .about-panel__title {
  margin: 0 0 0.6rem;
  font-size: clamp(1.15rem, 2.4vw, 1.4rem);
  color: var(--blue);
  font-weight: 700;
}
.page-about .about-timeline .tabpanel p {
  margin: 0 0 0.8rem;
  line-height: 1.8;
  font-size: 0.95rem;
}
.page-about .about-panel__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
}
.page-about .about-panel__list li {
  position: relative;
  padding-left: 1.15rem;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--ink);
}
.page-about .about-panel__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 0.55rem;
  height: 2px;
  background: var(--green);
}

.page-about .about-timeline__figure {
  margin: clamp(1.6rem, 3.4vw, 2.4rem) 0 0;
}
.page-about .about-timeline__figure .figure__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-timeline__figure .figure__caption {
  margin-top: 0.6rem;
  font-size: 0.78rem;
  color: var(--grey);
}

/* ---------- 服务网络 ---------- */
.page-about .about-map__label {
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--blue);
  text-transform: uppercase;
}
.page-about .about-map__cells {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.45rem;
  margin: 0;
  padding: 0;
}
.page-about .about-map__cell {
  padding: 0.72rem 0.4rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--blue);
  background: var(--about-mist-soft);
  border: 1px solid rgba(31, 122, 106, 0.22);
}
.page-about .about-map__cell:nth-child(3n+2) {
  background: rgba(31, 122, 106, 0.12);
}
.page-about .about-map__cell:nth-child(5n) {
  background: rgba(201, 154, 74, 0.16);
  border-color: rgba(201, 154, 74, 0.4);
}
.page-about .about-map__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1.1rem;
}
.page-about .about-map__foot {
  margin: 1rem 0 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--ink);
}
.page-about .about-map__foot a {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid var(--green);
}
.page-about .about-map__foot a:hover,
.page-about .about-map__foot a:focus-visible {
  color: var(--blue);
  border-bottom-color: var(--blue);
}

/* ---------- 团队矩阵 ---------- */
.page-about .about-team__lede {
  margin-bottom: clamp(1.3rem, 2.8vw, 1.9rem);
}
.page-about .about-team {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  margin: 0 0 clamp(1.6rem, 3.4vw, 2.4rem);
  padding: 0;
}
.page-about .about-team__plate {
  padding: 1.1rem 1.15rem 1.25rem;
  background: var(--warm);
  border: 1px solid var(--line);
  border-top: 3px solid var(--green);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, var(--about-cut) 100%, 0 calc(100% - var(--about-cut)));
}
.page-about .about-team__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--gold);
}
.page-about .about-team__name {
  margin: 0.3rem 0 0.45rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--blue);
}
.page-about .about-team__plate p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-quality {
  row-gap: clamp(1.3rem, 3vw, 2rem);
  align-items: start;
}
.page-about .about-quality .figure {
  margin: 0;
}
.page-about .about-quality .figure__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-quality .figure__caption {
  margin-top: 0.6rem;
  font-size: 0.78rem;
  color: var(--grey);
}
.page-about .about-quality__list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}
.page-about .about-quality__list li {
  padding: 0.6rem 0.8rem;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--ink);
  background: rgba(247, 243, 234, 0.8);
  border-left: 3px solid var(--blue);
}
.page-about .about-quality__list .mono {
  font-family: var(--font-mono);
  color: var(--blue);
  font-weight: 700;
}

/* ---------- 合作与荣誉 ---------- */
.page-about .about-honor {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}
.page-about .about-honor__item {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  padding: 0.9rem 1.05rem;
  background: var(--warm);
  border: 1px solid var(--line);
  border-left: 4px solid var(--gold);
}
.page-about .about-honor__item--wide {
  border-left-color: var(--green);
}
.page-about .about-honor__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 1.3rem;
  line-height: 1;
  color: var(--blue);
  letter-spacing: -0.02em;
}
.page-about .about-honor__text {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--ink);
}

/* ---------- 下一步 ---------- */
.page-about .about-next-wrap .chapter-head {
  margin-bottom: clamp(1.2rem, 2.8vw, 1.8rem);
}
.page-about .about-next {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
}
.page-about .about-next__card {
  padding: clamp(1.1rem, 2.6vw, 1.5rem);
  background: rgba(247, 243, 234, 0.08);
  border: 1px solid rgba(247, 243, 234, 0.26);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, var(--about-cut) 100%, 0 calc(100% - var(--about-cut)));
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.55rem;
}
.page-about .about-next__step {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}
.page-about .about-next__card h3 {
  margin: 0;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--warm);
}
.page-about .about-next__card p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: rgba(247, 243, 234, 0.82);
}
.page-about .about-next__card .btn {
  margin-top: 0.35rem;
}
.page-about .about-next__tail {
  margin: 1.3rem 0 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: rgba(247, 243, 234, 0.84);
}
.page-about .about-next__tail a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
}
.page-about .about-next__tail a:hover,
.page-about .about-next__tail a:focus-visible {
  color: var(--warm);
  border-bottom-color: var(--warm);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-honor {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-honor__item--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 768px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-map__cells {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-next {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-timeline .tabpanel {
    padding: clamp(1.4rem, 2.6vw, 2rem);
  }
}

@media (min-width: 1024px) {
  .page-about .about-map__cells {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-team__plate:last-child {
    grid-column: span 1;
  }
  .page-about .about-hero {
    padding-block: clamp(2.6rem, 4vw, 3.6rem) clamp(2.8rem, 4vw, 4rem);
  }
  .page-about .about-timeline .tabpanel {
    min-height: 15rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__jump a,
  .page-about .about-timeline .tab {
    transition: none;
  }
}
<<<END>>>