.page-about {
  --about-pad: clamp(3.5rem, 8vw, 7rem);
  --about-line: 1px solid var(--line);
  background: var(--void);
  color: var(--bright);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding-top: clamp(1rem, 3vw, 1.75rem);
}
.page-about .crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--slate);
}
.page-about .crumbs__item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.page-about .crumbs__item + .crumbs__item::before {
  content: "/";
  color: var(--line);
}
.page-about .crumbs__item a {
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.page-about .crumbs__item a:hover,
.page-about .crumbs__item a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.page-about .crumbs__item[aria-current="page"] {
  color: var(--orange);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  border-bottom: var(--about-line);
}
.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  padding-block: clamp(2rem, 6vw, 3.5rem) clamp(3rem, 8vw, 5.5rem);
}
.page-about .about-hero__aside {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  border-left: 2px solid var(--orange);
  padding-left: 1rem;
}
.page-about .about-hero__years {
  margin: 0;
  font-size: clamp(1.05rem, 2vw, 1.45rem);
  color: var(--bright);
  letter-spacing: 0.02em;
}
.page-about .about-hero__years span {
  color: var(--orange);
  padding-inline: 0.2em;
}
.page-about .about-hero__aside-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.9;
  color: var(--slate);
  letter-spacing: 0.04em;
}
.page-about .about-hero__title {
  margin: 0 0 clamp(1.25rem, 3vw, 2rem);
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.35rem, 7.6vw, 5.4rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--bright);
  max-width: 15ch;
}
.page-about .about-hero__title em {
  font-style: normal;
  color: var(--orange);
  position: relative;
  padding-bottom: 0.06em;
}
.page-about .about-hero__title em::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0.15em;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--orange), var(--magenta));
  transform: skewX(-18deg);
}
.page-about .about-hero__lead {
  margin: 0 0 clamp(1.75rem, 4vw, 2.5rem);
  max-width: 58ch;
  font-size: clamp(1rem, 1.05vw + 0.72rem, 1.16rem);
  line-height: 1.85;
  color: var(--slate);
}
.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}
.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: clamp(1rem, 2.4vw, 1.4rem);
  background: var(--deep);
}
.page-about .about-hero__stats .num {
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  font-weight: 500;
  color: var(--cyan);
  line-height: 1;
}
.page-about .about-hero__stat-key {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--slate);
}

/* ---------- 目录 ---------- */
.page-about .about-toc-wrap {
  border-bottom: var(--about-line);
}
.page-about .about-toc {
  padding-block: 0.9rem;
}
.page-about .toc__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .toc__link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--slate);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.page-about .toc__link:hover,
.page-about .toc__link:focus-visible,
.page-about .toc__link[aria-current="true"] {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 通用章节 ---------- */
.page-about .h-slant {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.2vw, 2.5rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  transform: skewX(-2deg);
  transform-origin: left center;
}
.page-about .about-scope,
.page-about .about-history,
.page-about .about-cert,
.page-about .about-eco,
.page-about .about-values,
.page-about .about-next {
  padding-block: var(--about-pad);
  border-bottom: var(--about-line);
}
.page-about .label {
  display: inline-block;
  margin-bottom: 1rem;
}

/* ---------- 01 业务范围 ---------- */
.page-about .about-scope__intro {
  margin-top: clamp(1.25rem, 3vw, 2rem);
  max-width: 62ch;
}
.page-about .about-scope__intro p {
  margin: 0;
  font-size: 17px;
  line-height: 1.85;
  color: var(--slate);
}
.page-about .about-scope__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: clamp(2rem, 5vw, 3.5rem) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}
.page-about .about-scope__card {
  position: relative;
  padding: clamp(1.5rem, 3.5vw, 2.25rem) clamp(1.25rem, 3vw, 2rem);
  background: var(--deep);
  transition: background .25s var(--ease), transform .25s var(--ease);
}
.page-about .about-scope__card::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--orange), var(--cyan));
  transition: width .35s var(--ease);
}
.page-about .about-scope__card:hover {
  background: #13224a;
  transform: translateY(-2px);
}
.page-about .about-scope__card:hover::after {
  width: 100%;
}
.page-about .about-scope__card .idx {
  display: block;
  margin-bottom: 0.9rem;
  color: var(--cyan);
}
.page-about .about-scope__card h3 {
  margin: 0 0 0.7rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--bright);
}
.page-about .about-scope__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}

/* ---------- 02 品牌历程 ---------- */
.page-about .about-history__lead {
  margin: 1.1rem 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--slate);
}
.page-about .about-history__figure {
  margin: clamp(2rem, 5vw, 3.25rem) 0 0;
}
.page-about .about-history__figure .figure__media {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
}
.page-about .about-history__list {
  position: relative;
  margin: clamp(2.25rem, 5vw, 3.5rem) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-history__list::before {
  content: "";
  position: absolute;
  left: 0.4rem;
  top: 2.2rem;
  bottom: 2.2rem;
  width: 2px;
  background: linear-gradient(180deg, var(--orange), var(--cyan), var(--line));
}
.page-about .about-history__item {
  position: relative;
  padding: 1.4rem 0 1.6rem clamp(2rem, 6vw, 3.4rem);
  border-bottom: 1px solid var(--line);
  transition: transform .25s var(--ease);
}
.page-about .about-history__item:last-child {
  border-bottom: 0;
  padding-bottom: 0.4rem;
}
.page-about .about-history__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.75rem;
  width: 0.8rem;
  height: 0.8rem;
  background: var(--void);
  border: 2px solid var(--line);
  transform: rotate(45deg);
  transition: border-color .25s var(--ease), background .25s var(--ease);
}
.page-about .about-history__item:hover::before,
.page-about .about-history__item:focus-within::before {
  border-color: var(--orange);
  background: var(--orange);
}
.page-about .about-history__mark {
  display: block;
  margin-bottom: 0.55rem;
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  color: var(--orange);
  letter-spacing: 0.05em;
}
.page-about .about-history__card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--bright);
}
.page-about .about-history__card p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}

/* ---------- 03 团队 ---------- */
.page-about .about-team {
  background: var(--cream);
  color: var(--umber);
  border-top: 3px solid var(--orange);
  padding-block: var(--about-pad);
}
.page-about .about-team__head::before {
  content: "";
  display: block;
  width: 84px;
  height: 6px;
  margin-bottom: 1.4rem;
  background: repeating-linear-gradient(-45deg, var(--orange) 0 6px, transparent 6px 12px);
}
.page-about .about-team .label--umber {
  color: var(--umber);
}
.page-about .about-team .h-slant {
  color: var(--umber);
}
.page-about .about-team__lead {
  margin: 1.1rem 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: #5a4438;
}
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  margin-top: clamp(2rem, 5vw, 3.25rem);
}
.page-about .about-team__figure {
  margin: 0;
}
.page-about .about-team__figure .figure__media {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
}
.page-about .about-team__panels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
}
.page-about .about-team__panel {
  position: relative;
  padding: clamp(1.25rem, 3vw, 1.75rem);
  background: var(--bright);
  border: 1px solid var(--umber);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  transition: transform .22s var(--ease), box-shadow .22s var(--ease);
}
.page-about .about-team__panel:hover {
  transform: translateY(-2px);
  box-shadow: 4px 4px 0 var(--orange);
}
.page-about .about-team__panel .idx {
  display: block;
  margin-bottom: 0.6rem;
  color: var(--magenta);
}
.page-about .about-team__panel h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--umber);
  transform: skewX(-2deg);
}
.page-about .about-team__panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: #4a362c;
}

/* ---------- 04 认证 ---------- */
.page-about .about-cert__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: start;
}
.page-about .about-cert__lead {
  margin: 1.1rem 0 clamp(1.75rem, 4vw, 2.5rem);
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--slate);
}
.page-about .about-cert__rings {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.page-about .about-cert__rings li {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr);
  gap: 0.35rem 1rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line);
}
.page-about .about-cert__rings .num {
  grid-row: 1 / span 2;
  font-size: 1.1rem;
  color: var(--cyan);
  letter-spacing: 0.04em;
}
.page-about .about-cert__rings h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--bright);
}
.page-about .about-cert__rings p {
  grid-column: 2;
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}
.page-about .about-cert__figure {
  margin: 0;
}
.page-about .about-cert__figure .figure__media {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
}

/* ---------- 05 协作生态 ---------- */
.page-about .about-eco__lead {
  margin: 1.1rem 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--slate);
}
.page-about .about-eco__band {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: clamp(2rem, 5vw, 3.25rem) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}
.page-about .about-eco__band li {
  padding: clamp(1.5rem, 3.5vw, 2.25rem);
  background: linear-gradient(160deg, var(--deep), var(--void));
}
.page-about .about-eco__band .num {
  display: block;
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 300;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}
.page-about .about-eco__key {
  display: block;
  margin-top: 0.6rem;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange);
}
.page-about .about-eco__band p {
  margin: 1rem 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}

/* ---------- 06 服务理念 ---------- */
.page-about .about-values__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  margin: clamp(2rem, 5vw, 3rem) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-values__list li {
  position: relative;
  padding-top: 1.4rem;
  border-top: 2px solid var(--line);
  transition: border-color .25s var(--ease);
}
.page-about .about-values__list li:hover {
  border-top-color: var(--orange);
}
.page-about .about-values__list .num {
  display: block;
  margin-bottom: 0.75rem;
  font-size: 1.4rem;
  color: var(--orange);
}
.page-about .about-values__list h3 {
  margin: 0 0 0.6rem;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--bright);
  transform: skewX(-2deg);
}
.page-about .about-values__list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--slate);
}

/* ---------- 07 下一步 ---------- */
.page-about .about-next__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 3rem);
}
.page-about .about-next__body p {
  margin: 1.1rem 0 0;
  max-width: 44ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--slate);
}
.page-about .about-next__list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.page-about .about-next__list li {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--line);
}
.page-about .about-next__list .idx {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--magenta);
}
.page-about .about-next__list h3 {
  margin: 0 0 0.45rem;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--bright);
}
.page-about .about-next__list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}
.page-about .about-next__cta {
  margin-top: clamp(2.25rem, 5vw, 3.5rem);
  padding-top: clamp(1.75rem, 4vw, 2.5rem);
  border-top: 2px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.page-about .about-next__cta p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--bright);
  max-width: 46ch;
}
.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-scope__cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-eco__band {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-values__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-team__panels {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }
  .page-about .about-team__panel--data { grid-column: span 5; }
  .page-about .about-team__panel--content { grid-column: span 4; }
  .page-about .about-team__panel--support { grid-column: span 3; }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 8fr);
    column-gap: clamp(2rem, 5vw, 4.5rem);
  }
  .page-about .about-history__item {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 8fr);
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: start;
    padding: 1.6rem 0 1.8rem clamp(2rem, 6vw, 3.4rem);
  }
  .page-about .about-history__mark {
    margin-bottom: 0;
    padding-top: 0.15rem;
  }
  .page-about .about-cert__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
  .page-about .about-next__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
  }
  .page-about .about-next__cta {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-scope__card,
  .page-about .about-team__panel,
  .page-about .about-history__item,
  .page-about .about-values__list li {
    transition: none;
  }
  .page-about .about-scope__card:hover,
  .page-about .about-team__panel:hover {
    transform: none;
  }
}
</main>