.page-about {
  --about-pad: clamp(40px, 7vw, 84px);
}

.page-about .about-block {
  padding: var(--about-pad) 0;
}

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

.page-about .about-block h2 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  font-size: clamp(1.5rem, 3.2vw, 2.15rem);
  line-height: 1.25;
  margin: 0 0 14px;
  color: var(--ink);
}

.page-about .about-block h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
  line-height: 1.45;
  margin: 0 0 8px;
  color: var(--ink);
}

.page-about .crumbs {
  padding-top: clamp(18px, 3vw, 28px);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--ink-55);
}

.page-about .crumbs a {
  color: var(--lake);
  text-decoration: none;
}

.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-about a:focus-visible,
.page-about button:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(20px, 3vw, 32px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .about-hero__lead h1 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  font-size: clamp(1.9rem, 5.4vw, 3.2rem);
  line-height: 1.16;
  margin: 0 0 18px;
  color: var(--ink);
}

.page-about .about-hero__lede {
  font-family: var(--font-serif);
  font-size: clamp(1rem, 1.15vw, 1.08rem);
  line-height: 1.8;
  color: var(--ink-70);
  max-width: 60ch;
  margin: 0 0 22px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 22px;
}

.page-about .about-hero__link {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  padding: 11px 20px;
  border: 1px solid var(--clay);
  background: var(--clay);
  color: #fff;
  transition: background 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-about .about-hero__link:hover {
  background: var(--lake);
  border-color: var(--lake);
}

.page-about .about-hero__link--quiet {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}

.page-about .about-hero__link--quiet:hover {
  background: transparent;
  color: var(--lake);
  border-color: var(--lake);
}

.page-about .about-hero__fig {
  margin: 0;
  position: relative;
  border: 1px solid var(--line);
  background: var(--paper);
}

.page-about .about-hero__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .about-hero__fig::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(22, 105, 122, 0.16) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(22, 105, 122, 0.16) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

.page-about .about-hero__caption {
  position: relative;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--ink-55);
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  background: var(--paper);
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-stat {
  background: var(--paper);
  padding: clamp(16px, 2.6vw, 24px);
  border-top: 3px solid var(--clay);
}

.page-about .about-stat:nth-child(2) {
  border-top-color: var(--lake);
}

.page-about .about-stat:nth-child(3) {
  border-top-color: var(--gold);
}

.page-about .about-stat__num {
  display: block;
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: 0.08em;
  color: var(--ink);
  margin-bottom: 6px;
}

.page-about .about-stat__label {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--ink-55);
}

/* ---------- 云南根基 ---------- */
.page-about .about-roots__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
}

.page-about .about-roots__body .prose p {
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--ink-70);
  margin: 0 0 16px;
  max-width: 66ch;
}

.page-about .about-roots__aside {
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 4px solid var(--lake);
  padding: clamp(18px, 3vw, 28px);
}

.page-about .about-roots__aside-title {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--ink-55);
  margin: 0 0 14px;
}

.page-about .about-roots__list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: roots;
}

.page-about .about-roots__list li {
  counter-increment: roots;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--ink);
  padding: 10px 0 10px 34px;
  position: relative;
  border-bottom: 1px solid var(--line);
}

.page-about .about-roots__list li:last-child {
  border-bottom: 0;
}

.page-about .about-roots__list li::before {
  content: "0" counter(roots);
  position: absolute;
  left: 0;
  top: 11px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--clay);
}

/* ---------- 发展历程 ---------- */
.page-about .about-history__head {
  max-width: 68ch;
  margin-bottom: clamp(22px, 3vw, 32px);
}

.page-about .about-history__head .lede {
  font-family: var(--font-serif);
  color: var(--ink-70);
  line-height: 1.8;
  margin: 0;
}

.page-about .about-history__fig {
  margin: 0 0 clamp(28px, 4vw, 44px);
  border: 1px solid var(--line);
  background: var(--lake-soft);
}

.page-about .about-history__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-history__caption {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--ink-70);
  padding: 10px 14px;
  background: var(--paper);
  border-top: 1px solid var(--line);
}

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

.page-about .about-track__item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-left: 6px;
  padding: 0 0 clamp(24px, 4vw, 38px) 24px;
  border-left: 1px solid var(--line);
  transition: border-color 0.24s var(--ease);
}

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

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 8px;
  width: 9px;
  height: 9px;
  background: var(--bone);
  border: 1px solid var(--clay);
  transform: rotate(45deg);
  transition: background 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .about-track__item:hover {
  border-left-color: var(--lake);
}

.page-about .about-track__item:hover::before,
.page-about .about-track__item:focus-within::before {
  background: var(--gold);
  border-color: var(--gold);
}

.page-about .about-track__scale {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .about-track__year {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  letter-spacing: 0.1em;
  color: var(--clay);
}

.page-about .about-track__tag {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--lake);
  background: var(--lake-soft);
  padding: 2px 8px;
}

.page-about .about-track__text {
  font-family: var(--font-serif);
  font-size: 0.96rem;
  line-height: 1.78;
  color: var(--ink-70);
  margin: 0;
  max-width: 64ch;
}

.page-about .about-track__text a {
  color: var(--lake);
  text-decoration: none;
  border-bottom: 1px solid var(--lake-soft);
}

.page-about .about-track__text a:hover {
  border-bottom-color: var(--clay);
  color: var(--clay);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-about .about-team__fig {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--paper);
}

.page-about .about-team__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .about-team__text {
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--ink-70);
  margin: 0 0 22px;
  max-width: 62ch;
}

.page-about .about-flow {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-flow__item {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 10px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-flow__num {
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--gold);
  padding-top: 3px;
}

.page-about .about-flow__item h3 {
  margin: 0 0 4px;
  font-size: 0.94rem;
}

.page-about .about-flow__item p {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  line-height: 1.65;
  color: var(--ink-55);
}

.page-about .about-team__mail {
  font-family: var(--font-sans);
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--ink-70);
  margin: 0;
  padding: 14px 16px;
  background: var(--bone);
  border-left: 3px solid var(--ok);
}

.page-about .about-team__mail a {
  color: var(--lake);
  text-decoration: none;
  border-bottom: 1px solid var(--lake-soft);
}

.page-about .about-team__mail a:hover {
  border-bottom-color: var(--clay);
}

.page-about .copy-btn {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  margin-top: 8px;
  padding: 8px 12px;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--lake);
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .copy-btn:hover {
  background: var(--lake);
  color: #fff;
}

.page-about .copy-btn.is-copied {
  background: var(--ok);
  border-color: var(--ok);
  color: #fff;
}

/* ---------- 六分类逻辑 ---------- */
.page-about .about-navlogic__head {
  max-width: 70ch;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-about .about-navlogic__head .lede {
  font-family: var(--font-serif);
  line-height: 1.8;
  color: var(--ink-70);
  margin: 0;
}

.page-about .about-navlogic__head .lede a {
  color: var(--lake);
  text-decoration: none;
  border-bottom: 1px solid var(--lake-soft);
}

.page-about .about-navlogic__head .lede a:hover {
  border-bottom-color: var(--clay);
  color: var(--clay);
}

.page-about .about-cats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-cats__item {
  background: var(--paper);
  padding: clamp(16px, 2.6vw, 26px);
  transition: background 0.22s var(--ease);
}

.page-about .about-cats__item:hover {
  background: var(--bone);
}

.page-about .about-cats__bar {
  display: block;
  width: 34px;
  height: 4px;
  background: var(--clay);
  margin-bottom: 14px;
}

.page-about .about-cats__item:nth-child(2n) .about-cats__bar {
  height: 7px;
  background: var(--lake);
  width: 46px;
}

.page-about .about-cats__item:nth-child(3n) .about-cats__bar {
  height: 10px;
  background: var(--gold);
  width: 26px;
}

.page-about .about-cats__num {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--ink-40);
  margin-bottom: 6px;
}

.page-about .about-cats__title {
  margin: 0 0 6px;
  font-size: 1rem;
}

.page-about .about-cats__text {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.84rem;
  line-height: 1.65;
  color: var(--ink-55);
}

.page-about .about-navlogic__note {
  margin-top: clamp(20px, 3vw, 30px);
  padding: clamp(16px, 2.6vw, 24px);
  background: var(--lake);
  color: var(--bone);
}

.page-about .about-navlogic__note p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 0.95rem;
  line-height: 1.78;
  max-width: 68ch;
  color: var(--bone-72);
}

/* ---------- 协作网络 ---------- */
.page-about .about-network__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 50px);
  align-items: start;
}

.page-about .about-network__text {
  font-family: var(--font-serif);
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--ink-70);
  margin: 0 0 14px;
  max-width: 62ch;
}

.page-about .about-network__text a {
  color: var(--lake);
  text-decoration: none;
  border-bottom: 1px solid var(--lake-soft);
}

.page-about .about-network__text a:hover {
  border-bottom-color: var(--clay);
  color: var(--clay);
}

.page-about .about-network__aside {
  background: var(--paper);
  border: 1px solid var(--line);
  border-top: 4px solid var(--clay);
  padding: clamp(18px, 3vw, 26px);
}

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

.page-about .about-network__item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-network__item:last-child {
  border-bottom: 0;
}

.page-about .about-network__item span.mono {
  font-size: 1.5rem;
  letter-spacing: 0.06em;
  color: var(--gold);
  min-width: 2.6ch;
}

.page-about .about-network__item p {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--ink-70);
}

.page-about .about-network__item--text {
  display: block;
  padding-left: 0;
}

.page-about .about-network__item--text p {
  color: var(--ink);
  font-weight: 500;
  position: relative;
  padding-left: 18px;
}

.page-about .about-network__item--text p::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 9px;
  height: 9px;
  background: var(--ok);
}

/* ---------- 选择理由 ---------- */
.page-about .about-reasons__head {
  max-width: 60ch;
  margin-bottom: clamp(22px, 3vw, 32px);
}

.page-about .about-reasons__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-reasons__item {
  background: var(--paper);
  padding: clamp(18px, 2.8vw, 28px);
  position: relative;
  transition: box-shadow 0.22s var(--ease);
}

.page-about .about-reasons__item:hover {
  box-shadow: inset 3px 0 0 var(--lake);
}

.page-about .about-reasons__num {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--clay);
  margin-bottom: 10px;
}

.page-about .about-reasons__item h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.page-about .about-reasons__item p {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--ink-55);
}

/* ---------- 结尾 ---------- */
.page-about .about-end {
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .about-end__inner {
  background: var(--ink);
  color: var(--bone);
  padding: clamp(26px, 4.5vw, 46px);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 34px);
  align-items: end;
  border-top: 6px solid var(--clay);
}

.page-about .about-end__text h2 {
  color: var(--bone);
  margin-bottom: 12px;
}

.page-about .about-end__text p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--bone-72);
  max-width: 58ch;
}

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

.page-about .about-end__link {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.86rem;
  font-weight: 700;
  text-decoration: none;
  padding: 12px 20px;
  background: var(--clay);
  color: #fff;
  border: 1px solid var(--clay);
  transition: background 0.22s var(--ease), border-color 0.22s var(--ease), color 0.22s var(--ease);
}

.page-about .about-end__link:hover {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink);
}

.page-about .about-end__link--quiet {
  background: transparent;
  color: var(--bone);
  border-color: var(--bone-38);
}

.page-about .about-end__link--quiet:hover {
  background: transparent;
  color: var(--gold);
  border-color: var(--gold);
}

/* ---------- 桌面增强 ---------- */
@media (min-width: 760px) {
  .page-about .about-cats {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .about-reasons__list {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .about-track__item {
    grid-template-columns: 150px 1fr;
    gap: clamp(18px, 3vw, 44px);
    padding-left: clamp(20px, 3vw, 34px);
  }

  .page-about .about-track__scale {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    position: sticky;
    top: 96px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 7fr 5fr;
    align-items: end;
  }

  .page-about .about-roots__grid {
    grid-template-columns: 8fr 4fr;
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }

  .page-about .about-network__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-about .about-cats {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-end__inner {
    grid-template-columns: 7fr 5fr;
  }

  .page-about .about-end__actions {
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition: none !important;
  }
}
<<<END>>>