.page-about {
  --about-index-w: 210px;
  --about-gap: 48px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--sand);
  border-bottom: 1px solid var(--ink);
  padding: 22px 0 44px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 34%;
  background: var(--board);
  clip-path: polygon(28% 0, 100% 0, 100% 100%, 0 100%);
  z-index: 0;
}

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

.page-about .about-hero .breadcrumbs {
  margin-bottom: 26px;
  font-size: 13px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-hero__lead h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 7vw, 60px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 10px 0 0;
  max-width: 14em;
}

.page-about .about-hero__lead .lede {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.75;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__panel {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--ink);
  box-shadow: 6px 6px 0 var(--orange);
  padding: 22px 20px 24px;
}

.page-about .about-hero__panel-tag {
  display: inline-block;
  margin: 0 0 12px;
  padding: 3px 10px;
  background: var(--pine);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.page-about .about-hero__panel-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
}

.page-about .about-hero__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--slate);
}

.page-about .about-hero__steps li {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 8px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--mist);
}

.page-about .about-hero__step-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--pine-light);
  padding-top: 2px;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--ink);
}

.page-about .about-hero__stats .stat__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 26px;
  line-height: 1.1;
  color: var(--pine);
}

.page-about .about-hero__stats .stat__label {
  display: block;
  margin-top: 4px;
  font-size: 11px;
  line-height: 1.45;
  color: var(--slate);
}

/* ---------- 主区骨架 ---------- */
.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-top: 36px;
  padding-bottom: 64px;
}

.page-about .about-index {
  border: 1px solid var(--ink);
  background: var(--paper);
  box-shadow: 4px 4px 0 var(--ink);
}

.page-about .about-index__title {
  margin: 0;
  padding: 9px 14px;
  background: var(--pine);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
}

.page-about .about-index nav {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-index__link {
  flex: 0 0 auto;
  scroll-snap-align: start;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 12px 14px;
  color: var(--ink);
  text-decoration: none;
  font-size: 13px;
  border-right: 1px solid var(--sand-deep);
  white-space: nowrap;
  transition: background 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .about-index__link:last-child {
  border-right: 0;
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--pine-light);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  background: var(--sand);
  color: var(--pine);
  outline: none;
}

.page-about .about-index__link:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: -3px;
}

.page-about .about-flow {
  display: grid;
  gap: 44px;
  min-width: 0;
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  min-width: 0;
}

.page-about .about-sec__head h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(27px, 4.6vw, 40px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 8px 0 0;
}

.page-about .about-sec__lead {
  margin: 14px 0 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 标签切换 ---------- */
.page-about .about-tabs {
  position: relative;
  margin-top: 26px;
  border: 1px solid var(--ink);
  background: var(--paper);
  box-shadow: 4px 4px 0 var(--sand-deep);
}

.page-about .about-tabs__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-about .about-tabs__bar {
  display: flex;
  border-bottom: 1px solid var(--ink);
  background: var(--sand);
}

.page-about .about-tabs__bar label {
  flex: 1 1 0;
  text-align: center;
  padding: 12px 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  cursor: pointer;
  border-right: 1px solid var(--ink);
  transition: background 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .about-tabs__bar label:last-child {
  border-right: 0;
}

.page-about .about-tabs__bar label:hover {
  background: var(--sand-deep);
}

.page-about .about-tabs__panels {
  padding: 22px 18px 24px;
}

.page-about .about-tabs__panels > * {
  display: none;
}

.page-about .about-tabs__panel h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.3;
  margin: 0 0 10px;
  color: var(--pine);
}

.page-about .about-tabs__panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-tabs__radio:nth-of-type(1):checked ~ .about-tabs__bar label:nth-of-type(1),
.page-about .about-tabs__radio:nth-of-type(2):checked ~ .about-tabs__bar label:nth-of-type(2),
.page-about .about-tabs__radio:nth-of-type(3):checked ~ .about-tabs__bar label:nth-of-type(3) {
  background: var(--pine);
  color: var(--paper);
}

.page-about .about-tabs__radio:nth-of-type(1):checked ~ .about-tabs__bar label:nth-of-type(1)::before,
.page-about .about-tabs__radio:nth-of-type(2):checked ~ .about-tabs__bar label:nth-of-type(2)::before,
.page-about .about-tabs__radio:nth-of-type(3):checked ~ .about-tabs__bar label:nth-of-type(3)::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 7px;
  background: var(--orange);
  vertical-align: 1px;
}

.page-about .about-tabs__radio:nth-of-type(1):checked ~ .about-tabs__panels > :nth-child(1),
.page-about .about-tabs__radio:nth-of-type(2):checked ~ .about-tabs__panels > :nth-child(2),
.page-about .about-tabs__radio:nth-of-type(3):checked ~ .about-tabs__panels > :nth-child(3) {
  display: block;
}

.page-about .about-tabs:has(#about-tab-find:focus-visible) label[for="about-tab-find"],
.page-about .about-tabs:has(#about-tab-read:focus-visible) label[for="about-tab-read"],
.page-about .about-tabs:has(#about-tab-swap:focus-visible) label[for="about-tab-swap"] {
  outline: 3px solid var(--orange);
  outline-offset: -3px;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 28px 0 0;
  border: 1px solid var(--ink);
  background: var(--paper);
  box-shadow: 5px 5px 0 var(--ink);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
  filter: saturate(0.82) contrast(1.02);
}

.page-about .about-figure figcaption {
  padding: 9px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--slate);
  border-top: 1px solid var(--ink);
  background: var(--sand);
  font-family: var(--font-mono);
}

/* ---------- 服务对象 ---------- */
.page-about .about-who {
  display: grid;
  gap: 18px;
  margin-top: 26px;
}

.page-about .about-who__card {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--ink);
  box-shadow: 4px 4px 0 var(--ink);
  padding: 20px 18px 22px;
}

.page-about .about-who__card:nth-child(even) {
  background: var(--sand);
  box-shadow: 4px 4px 0 var(--pine);
}

.page-about .about-who__card .tag {
  display: inline-block;
  margin: 0 0 12px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.page-about .about-who__card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.32;
  margin: 0 0 9px;
}

.page-about .about-who__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 深色数据带 ---------- */
.page-about .about-band {
  background: var(--pine);
  color: var(--paper);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  padding: 26px 0;
  position: relative;
}

.page-about .about-band::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 96px;
  height: 5px;
  background: var(--orange);
}

.page-about .about-band__inner {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 18px;
}

.page-about .about-band__stat {
  border-left: 2px solid var(--orange);
  padding-left: 12px;
}

.page-about .about-band__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 32px;
  line-height: 1;
  color: var(--paper);
}

.page-about .about-band__num::after {
  content: "+";
  font-size: 16px;
  vertical-align: 8px;
  color: var(--orange);
}

.page-about .about-band__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--sand);
}

/* ---------- 能力清单 ---------- */
.page-about .about-cap {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--ink);
}

.page-about .about-cap > li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  padding: 20px 0;
  border-bottom: 1px solid var(--mist);
}

.page-about .about-cap__num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
  padding-top: 3px;
}

.page-about .about-cap h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.3;
  margin: 0 0 8px;
  color: var(--pine);
}

.page-about .about-cap p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 本地覆盖 ---------- */
.page-about .about-cover__grid {
  display: grid;
  gap: 22px;
  margin-top: 26px;
}

.page-about .about-cover__map {
  margin: 0;
  border: 1px solid var(--ink);
  background: var(--sand);
  box-shadow: 5px 5px 0 var(--ink);
  position: relative;
  overflow: hidden;
}

.page-about .about-cover__map img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 10 / 7;
  filter: saturate(0.75) contrast(0.95);
}

.page-about .about-cover__map figcaption {
  padding: 9px 13px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  color: var(--pine);
  border-top: 1px solid var(--ink);
  background: var(--paper);
}

.page-about .about-cover__panel {
  border: 1px solid var(--ink);
  background: var(--paper);
  padding: 18px 16px 20px;
}

.page-about .about-cover__list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-cover__list li {
  padding: 10px 12px;
  border-left: 3px solid var(--mist);
  background: linear-gradient(90deg, var(--sand) 0%, rgba(232, 213, 183, 0) 92%);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .about-cover__list li:hover,
.page-about .about-cover__list li:focus-within {
  border-left-color: var(--orange);
  transform: translateX(3px);
}

.page-about .about-cover__list h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.3;
  margin: 0 0 5px;
}

.page-about .about-cover__list p {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 22px;
  border-top: 1px solid var(--ink);
  padding-top: 26px;
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid var(--ink);
  box-shadow: 5px 5px 0 var(--sand-deep);
  background: var(--sand);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
  filter: saturate(0.8);
}

.page-about .about-team__body h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 4.4vw, 38px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 8px 0 14px;
}

.page-about .about-team__body p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .about-team__links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 6px;
  padding-top: 14px;
  border-top: 1px dashed var(--mist);
  font-family: var(--font-mono);
  font-size: 13px;
}

.page-about .about-team__links a {
  color: var(--pine-light);
  text-decoration: none;
  border-bottom: 1px solid var(--pine-light);
  padding-bottom: 2px;
}

.page-about .about-team__links a:hover,
.page-about .about-team__links a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
  outline: none;
}

/* ---------- 阶段日志 ---------- */
.page-about .about-log__item {
  margin-top: 12px;
  border: 1px solid var(--ink);
  background: var(--paper);
  box-shadow: 4px 4px 0 var(--ink);
}

.page-about .about-log__item + .about-log__item {
  margin-top: 14px;
}

.page-about .about-log__item summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) 20px;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  background: var(--sand);
}

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

.page-about .about-log__item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--pine);
  text-align: center;
}

.page-about .about-log__item[open] summary::after {
  content: "−";
  color: var(--orange);
}

.page-about .about-log__stage {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--paper);
  background: var(--pine);
  padding: 3px 8px;
  white-space: nowrap;
}

.page-about .about-log__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.3;
}

.page-about .about-log__item summary:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: -3px;
}

.page-about .about-log__body {
  padding: 14px 16px 18px;
  border-top: 1px solid var(--ink);
}

.page-about .about-log__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 结尾行动 ---------- */
.page-about .about-cta {
  background: var(--board);
  color: var(--paper);
  border: 1px solid var(--ink);
  box-shadow: 6px 6px 0 var(--orange);
  padding: 26px 20px 28px;
}

.page-about .about-cta h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 4.2vw, 34px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 10px;
}

.page-about .about-cta p {
  margin: 0 0 20px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--sand);
  max-width: 38em;
}

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

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

/* ---------- 平板/桌面 ---------- */
@media (min-width: 760px) {
  .page-about .about-who {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .about-who__card:nth-child(even) {
    margin-top: 26px;
  }

  .page-about .about-band__inner {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .about-band__num {
    font-size: 36px;
  }

  .page-about .about-cover__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
    gap: 26px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
    gap: 30px;
  }

  .page-about .about-tabs__panels {
    padding: 26px 24px 28px;
  }

  .page-about .about-cta {
    padding: 34px 30px 36px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding: 26px 0 60px;
  }

  .page-about .about-hero::before {
    width: 36%;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-hero__panel {
    padding: 26px 24px 28px;
  }

  .page-about .about-shell {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    gap: var(--about-gap);
    padding-top: 56px;
    padding-bottom: 88px;
  }

  .page-about .about-index {
    position: sticky;
    top: 92px;
    align-self: start;
  }

  .page-about .about-index nav {
    display: block;
    overflow-x: visible;
  }

  .page-about .about-index__link {
    display: flex;
    width: 100%;
    border-right: 0;
    border-bottom: 1px solid var(--sand-deep);
    white-space: normal;
    font-size: 13.5px;
  }

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

  .page-about .about-flow {
    gap: 64px;
  }

  .page-about .about-cap > li {
    grid-template-columns: 58px minmax(0, 1fr);
    gap: 18px;
    padding: 24px 0;
  }

  .page-about .about-figure {
    margin-top: 34px;
  }

  .page-about .about-band {
    padding: 34px 0;
  }

  .page-about .about-log__item summary {
    padding: 16px 20px;
  }

  .page-about .about-log__body {
    padding: 16px 20px 20px;
  }
}
<<<END>>>