.page-about {
  --about-line: 2px solid var(--grape-soft);
  background: var(--cream);
  color: var(--ink);
  overflow-x: clip;
}

.page-about a:focus-visible,
.page-about .rail-list__link:focus-visible,
.page-about .node:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-about .about-top {
  padding-top: 22px;
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  padding: 18px 0 10px;
}

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

.page-about .about-hero__title {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(34px, 8vw, 62px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 0.15em 0 0.4em;
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--grape);
  background: linear-gradient(transparent 62%, rgba(255, 159, 69, 0.45) 62%);
  padding: 0 0.06em;
}

.page-about .about-hero__lede {
  font-size: clamp(17px, 2.4vw, 20px);
  line-height: 1.78;
  max-width: 36em;
  margin: 0 0 28px;
}

.page-about .about-hero__media {
  border: var(--bd);
  background: var(--white);
  box-shadow: var(--shadow);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

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

.page-about .about-fact {
  display: flex;
  align-items: baseline;
  gap: 16px;
  border: var(--bd);
  background: var(--white);
  box-shadow: var(--shadow);
  padding: 16px 18px;
}

.page-about .about-fact__num {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 26px;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--grape);
  white-space: nowrap;
}

.page-about .about-fact__label {
  font-size: 15px;
  line-height: 1.62;
  color: var(--muted);
}

.page-about .about-fact--accent {
  background: var(--grape);
}

.page-about .about-fact--accent .about-fact__num {
  color: var(--orange);
}

.page-about .about-fact--accent .about-fact__label {
  color: var(--cream);
}

/* ---------- 主体双栏 ---------- */
.page-about .about-body {
  display: grid;
  gap: 46px;
  margin-top: 58px;
}

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

.page-about .about-sec + .about-sec {
  margin-top: 62px;
}

.page-about .about-p {
  font-size: 17px;
  line-height: 1.85;
  margin: 0 0 1.1em;
}

.page-about .about-p a {
  color: var(--grape);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.page-about .about-p--tail {
  margin: 22px 0 0;
}

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

.page-about .about-quote {
  margin: 26px 0 0;
  border: var(--bd);
  border-left: 8px solid var(--grape);
  background: var(--white);
  box-shadow: var(--shadow);
  padding: 22px 24px;
}

.page-about .about-quote p {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(19px, 2.6vw, 24px);
  line-height: 1.5;
}

/* ---------- 三类服务 ---------- */
.page-about .svc-grid {
  display: grid;
  gap: 18px;
  margin-top: 24px;
}

.page-about .svc {
  display: flex;
  flex-direction: column;
  border: var(--bd);
  background: var(--white);
  box-shadow: var(--shadow);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .svc__bar {
  height: 8px;
  background: var(--grape);
  border-bottom: var(--bd);
}

.page-about .svc--green .svc__bar {
  background: var(--green);
}

.page-about .svc--orange .svc__bar {
  background: var(--orange);
}

.page-about .svc__body {
  padding: 20px 20px 18px;
}

.page-about .svc__title {
  font-family: var(--serif);
  font-weight: 800;
  font-size: 21px;
  line-height: 1.4;
  margin: 12px 0 10px;
}

.page-about .svc__lead {
  font-size: 16px;
  line-height: 1.75;
  margin: 0 0 14px;
}

.page-about .svc__scene {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  border-top: 1px dashed var(--grape-soft);
  padding-top: 12px;
  margin: 0;
}

.page-about .svc:hover {
  transform: translate(2px, 2px);
  box-shadow: var(--shadow-hover);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 28px;
  margin-top: 22px;
}

.page-about .team-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: var(--bd);
}

.page-about .team-list__item {
  display: grid;
  gap: 4px;
  padding: 15px 0;
  border-bottom: 1px solid var(--grape-soft);
}

.page-about .team-list__name {
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--grape);
}

.page-about .team-list__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-figure {
  margin: 0;
  border: var(--bd);
  background: var(--white);
  box-shadow: var(--shadow);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 7;
  object-fit: cover;
}

.page-about .about-figure--wide img {
  aspect-ratio: 5 / 2;
}

.page-about .about-figure figcaption {
  border-top: 1px solid var(--grape-soft);
  padding: 12px 16px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 版本节点 ---------- */
.page-about .nodes {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  border-top: var(--bd);
}

.page-about .node {
  display: grid;
  gap: 6px;
  padding: 20px 0;
  border-bottom: var(--bd);
  scroll-margin-top: 120px;
}

.page-about .node__ver {
  font-family: var(--mono);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 34px);
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--grape);
}

.page-about .node--current .node__ver {
  color: var(--orange);
}

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

.page-about .node__title {
  font-family: var(--serif);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.45;
  margin: 0 0 6px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-about .node__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .node:target {
  background: var(--green-soft);
  box-shadow: inset 6px 0 0 0 var(--green);
  padding-left: 14px;
}

/* ---------- 协作 ---------- */
.page-about .partners {
  display: grid;
  gap: 16px;
  margin: 24px 0 0;
}

.page-about .partner {
  display: grid;
  gap: 6px;
  border: var(--bd-soft);
  background: var(--white);
  box-shadow: var(--shadow-soft);
  padding: 18px;
}

.page-about .partner__num {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 34px;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--grape);
}

.page-about .partner__label {
  font-size: 15px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 侧栏 ---------- */
.page-about .about-rail {
  min-width: 0;
}

.page-about .about-rail__inner {
  border: var(--bd);
  background: var(--white);
  box-shadow: var(--shadow);
  padding: 22px 20px;
}

.page-about .about-rail__title {
  font-family: var(--serif);
  font-weight: 800;
  font-size: 20px;
  margin: 0 0 8px;
}

.page-about .about-rail__note {
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
  margin: 0 0 16px;
}

.page-about .rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--grape-soft);
}

.page-about .rail-list__item {
  position: relative;
  padding: 10px 0 10px 22px;
}

.page-about .rail-list__item::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 17px;
  width: 12px;
  height: 12px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--white);
}

.page-about .rail-list__item:last-child::before {
  background: var(--orange);
  border-color: var(--grape-deep);
}

.page-about .rail-list__link {
  display: grid;
  gap: 2px;
  text-decoration: none;
  color: var(--ink);
  border-left: 0 solid var(--grape);
  padding-left: 0;
  transition: border-color 0.2s var(--ease), padding-left 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .rail-list__ver {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--grape);
}

.page-about .rail-list__txt {
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .rail-list__link:hover {
  border-left: 8px solid var(--grape);
  padding-left: 10px;
}

.page-about .rail-list__link:hover .rail-list__txt {
  color: var(--ink);
}

.page-about .about-rail__sync {
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--grape-soft);
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .about-rail__top {
  display: inline-block;
  margin-top: 14px;
  font-size: 14px;
  font-weight: 700;
  color: var(--grape);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

/* ---------- 收尾 ---------- */
.page-about .about-close {
  margin-top: 72px;
  background: var(--grape);
  color: var(--cream);
  border-top: var(--bd);
  border-bottom: var(--bd);
}

.page-about .about-close__inner {
  padding-top: 50px;
  padding-bottom: 54px;
}

.page-about .about-close__num {
  display: inline-block;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--orange);
  border: 2px solid var(--grape-deep);
  background: var(--grape-deep);
  padding: 4px 10px;
  margin-bottom: 16px;
}

.page-about .about-close__title {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.36;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--cream);
}

.page-about .about-close__p {
  margin: 14px 0 0;
  max-width: 46em;
  font-size: 16px;
  line-height: 1.8;
  color: #EDE6F5;
}

.page-about .about-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 26px;
}

.page-about .about-close__link {
  display: inline-flex;
  align-items: center;
  border: 2px solid var(--cream);
  color: var(--cream);
  padding: 12px 20px;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 6px 6px 0 0 rgba(43, 34, 51, 0.55);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .about-close__link:hover {
  transform: translate(2px, 2px);
  box-shadow: 4px 4px 0 0 rgba(43, 34, 51, 0.55);
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-about .svc-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .node {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 26px;
    align-items: baseline;
  }

  .page-about .partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .team-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
    gap: 38px;
    align-items: start;
  }
}

@media (min-width: 980px) {
  .page-about .about-hero {
    padding: 30px 0 12px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-fact:nth-child(2),
  .page-about .about-fact:nth-child(4) {
    margin-left: 26px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 60px;
    align-items: start;
  }

  .page-about .about-rail__inner {
    position: sticky;
    top: 112px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .svc,
  .page-about .rail-list__link,
  .page-about .about-close__link {
    transition: none;
  }
}