.page-about {
  --about-gap: clamp(2.4rem, 7vw, 4.6rem);
  --about-pad: clamp(1.15rem, 3.2vw, 2.2rem);
  background: var(--ink-deep);
  color: var(--text-light);
  padding-bottom: clamp(2rem, 6vw, 4rem);
}

.page-about .shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* 面包屑 */
.page-about .about-crumb {
  padding-top: clamp(1rem, 3vw, 1.8rem);
}
.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .4rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .04em;
  color: rgba(244, 239, 228, .55);
}
.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: .4rem;
  color: var(--line-amber);
}
.page-about .breadcrumb a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-about .breadcrumb a:hover {
  border-bottom-color: var(--line-amber);
}

/* 首屏 */
.page-about .about-hero {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.8rem);
  padding-top: clamp(1.1rem, 3vw, 1.9rem);
  padding-bottom: var(--about-gap);
}
.page-about .about-hero__lead .h1 {
  margin: .55rem 0 1rem;
  line-height: 1.03;
  letter-spacing: .005em;
}
.page-about .lede {
  margin: 0 0 1rem;
  max-width: 32em;
  font-size: clamp(1rem, 2.1vw, 1.18rem);
  line-height: 1.78;
  color: rgba(244, 239, 228, .88);
}
.page-about .prose {
  margin: 0 0 1.1rem;
  max-width: 34em;
  line-height: 1.82;
  color: rgba(244, 239, 228, .76);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.4rem;
}
.page-about .about-hero__figure {
  position: relative;
  margin: 0;
}
.page-about .about-hero__figure::before {
  content: "";
  position: absolute;
  right: -.5rem;
  bottom: -.5rem;
  width: 40%;
  height: 40%;
  border-right: 1px solid var(--line-amber);
  border-bottom: 1px solid var(--line-amber);
  pointer-events: none;
}

/* 图片通用 */
.page-about .figure {
  margin: 0;
}
.page-about .figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  object-fit: cover;
}
.page-about .about-hero__figure img {
  aspect-ratio: 14 / 9;
}
.page-about .about-space__figure img {
  aspect-ratio: 9 / 7;
}
.page-about .about-flow__figure img {
  aspect-ratio: 4 / 3;
}
.page-about .caption {
  margin-top: .6rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  line-height: 1.65;
  color: rgba(244, 239, 228, .52);
}

/* 概况条 */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-slate);
  border-top: 1px solid var(--line-amber);
  border-bottom: 1px solid var(--line-amber);
  margin-bottom: var(--about-gap);
}
.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: .4rem;
  padding: 1rem .9rem;
  background: var(--ink-deep);
}
.page-about .about-stat__num {
  font-size: clamp(1.35rem, 3.6vw, 1.95rem);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--amber);
}
.page-about .about-stat__label {
  font-size: .8rem;
  line-height: 1.55;
  color: rgba(244, 239, 228, .72);
}

/* 章节通用 */
.page-about .about-section {
  padding-block: clamp(1.8rem, 5vw, 3.2rem);
}
.page-about .about-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .3rem 1rem;
  align-items: start;
  margin-bottom: clamp(1.3rem, 3.4vw, 2.1rem);
}
.page-about .about-head__num {
  font-size: .82rem;
  letter-spacing: .14em;
  color: var(--amber);
  padding-top: .5rem;
}
.page-about .about-head__text {
  min-width: 0;
}
.page-about .about-head .eyebrow {
  margin: 0 0 .35rem;
  color: var(--celadon);
}
.page-about .about-head .h2 {
  margin: 0;
  line-height: 1.18;
  letter-spacing: .005em;
}

/* 年份轨道 */
.page-about .about-era {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-era__item {
  position: relative;
  padding: 0 0 clamp(1.4rem, 3.4vw, 2.1rem) 1.7rem;
  border-left: 1px solid var(--line-amber);
}
.page-about .about-era__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}
.page-about .about-era__item::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: .5rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(214, 162, 74, .14);
}
.page-about .about-era__year {
  display: block;
  margin-bottom: .35rem;
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .1em;
  color: var(--celadon);
}
.page-about .about-era__body .h3 {
  margin: 0 0 .3rem;
  color: var(--text-light);
}
.page-about .about-era__body p {
  margin: 0;
  max-width: 40em;
  font-size: .94rem;
  line-height: 1.78;
  color: rgba(244, 239, 228, .74);
}

/* 纸感章节 */
.page-about .about-sheet {
  position: relative;
  overflow: hidden;
  padding: var(--about-pad);
  background: var(--paper);
  color: var(--text-dark);
  border-radius: var(--radius);
}
.page-about .about-sheet::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(0deg, rgba(122, 91, 62, .05) 0 1px, transparent 1px 6px);
  pointer-events: none;
}
.page-about .about-sheet > * {
  position: relative;
}
.page-about .about-sheet :is(p, li, h2, h3, .caption) {
  color: var(--text-dark);
}
.page-about .about-sheet .eyebrow {
  color: var(--wood);
}
.page-about .about-sheet .about-head__num {
  color: var(--wood);
}
.page-about .about-sheet .caption {
  color: rgba(20, 33, 43, .62);
}
.page-about .about-space__grid {
  display: grid;
  gap: clamp(1.3rem, 3.5vw, 2.2rem);
}
.page-about .about-space__text p {
  margin: 0 0 .95rem;
  max-width: 34em;
  font-size: .95rem;
  line-height: 1.8;
}
.page-about .about-space__list {
  list-style: none;
  margin: 1.1rem 0 1.2rem;
  padding: 0;
  display: grid;
  gap: .7rem;
}
.page-about .about-space__list li {
  position: relative;
  padding-left: 1.5rem;
  font-size: .92rem;
  line-height: 1.72;
}
.page-about .about-space__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: .62rem;
  height: 2px;
  background: var(--wood);
}
.page-about .about-link {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid var(--line-amber);
  padding-bottom: 1px;
}
.page-about .about-link:hover {
  color: var(--amber-soft);
}
.page-about .about-sheet .about-link {
  color: var(--wood);
  border-bottom-color: rgba(122, 91, 62, .5);
}

/* 服务流程 */
.page-about .about-flow {
  display: grid;
  gap: clamp(1.4rem, 3.6vw, 2.4rem);
}
.page-about .about-flow__steps {
  list-style: none;
  margin: 1.3rem 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-slate);
  border-top: 1px solid var(--line-slate);
  border-bottom: 1px solid var(--line-slate);
}
.page-about .about-flow__steps li {
  display: grid;
  grid-template-columns: 2.3rem minmax(0, 1fr);
  gap: .15rem .8rem;
  padding: 1rem 1.05rem;
  background: var(--ink-layer);
}
.page-about .about-flow__steps li > .numeral {
  grid-row: 1 / span 2;
  padding-top: .3rem;
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--amber);
}
.page-about .about-flow__steps .h3 {
  margin: 0;
  color: var(--text-light);
}
.page-about .about-flow__steps li > p {
  grid-column: 2;
  margin: .15rem 0 0;
  font-size: .9rem;
  line-height: 1.72;
  color: rgba(244, 239, 228, .74);
}

/* 服务网络 */
.page-about .about-section--net {
  margin-block: clamp(1rem, 3vw, 2rem);
  padding-block: clamp(2rem, 5.5vw, 3.4rem);
  background: linear-gradient(180deg, var(--ink-layer), var(--ink-deep));
  border-top: 1px solid var(--line-slate);
  border-bottom: 1px solid var(--line-slate);
}
.page-about .about-net {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.8rem);
  align-items: center;
}
.page-about .about-net__legend {
  list-style: none;
  margin: 1.2rem 0 0;
  padding: 0;
  display: grid;
  gap: .55rem;
}
.page-about .about-net__item {
  display: grid;
  grid-template-columns: .95rem minmax(0, 1fr);
  gap: .1rem .7rem;
  align-items: center;
  padding: .62rem .85rem;
  border: 1px solid var(--line-slate);
  border-radius: var(--radius);
  background: rgba(8, 24, 38, .55);
  transition: border-color .18s var(--ease);
}
.page-about .about-net__item:hover {
  border-color: var(--line-amber);
}
.page-about .about-net__swatch {
  width: .95rem;
  height: .95rem;
  border-radius: 50%;
}
.page-about .about-net__swatch--amber {
  background: var(--amber);
}
.page-about .about-net__swatch--celadon {
  background: var(--celadon);
}
.page-about .about-net__swatch--coral {
  background: var(--coral);
}
.page-about .about-net__label {
  font-size: .9rem;
  line-height: 1.5;
  color: var(--text-light);
}
.page-about .about-net__hint {
  grid-column: 2;
  font-size: .76rem;
  line-height: 1.6;
  color: rgba(244, 239, 228, .5);
  transition: color .18s var(--ease);
}
.page-about .about-net__item:hover .about-net__hint {
  color: var(--celadon);
}
.page-about .about-net__note {
  margin: 1.1rem 0 0;
  font-size: .88rem;
  line-height: 1.75;
  color: rgba(244, 239, 228, .68);
}
.page-about .about-net__map {
  padding: clamp(.6rem, 2vw, 1.2rem);
  border: 1px solid var(--line-slate);
  border-radius: var(--radius);
  background: rgba(8, 24, 38, .5);
}
.page-about .about-net__svg {
  display: block;
  width: 100%;
  height: auto;
}
.page-about .about-net__links line {
  stroke: rgba(214, 162, 74, .28);
  stroke-width: 1;
}
.page-about .about-net__dot {
  fill: var(--celadon);
  transition: fill .18s var(--ease);
}
.page-about .about-net__node:hover .about-net__dot {
  fill: var(--coral);
}
.page-about .about-net__hub-ring {
  fill: none;
  stroke: rgba(214, 162, 74, .45);
  stroke-width: 1;
}
.page-about .about-net__node--hub .about-net__dot {
  fill: var(--amber);
}
.page-about .about-net__num {
  fill: rgba(244, 239, 228, .55);
  font-family: var(--font-mono);
  font-size: 10px;
  text-anchor: middle;
}
.page-about .about-net__hub-text {
  fill: var(--amber);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-anchor: middle;
}

/* 服务理念 */
.page-about .about-value__grid {
  display: grid;
  gap: 1px;
  background: var(--line-slate);
  border-radius: var(--radius);
  overflow: hidden;
}
.page-about .about-value__card {
  padding: var(--about-pad);
}
.page-about .about-value__card .tag {
  margin: 0 0 .7rem;
}
.page-about .about-value__card .h3 {
  margin: 0 0 .7rem;
  line-height: 1.35;
}
.page-about .about-value__card p {
  margin: 0 0 .85rem;
  font-size: .93rem;
  line-height: 1.82;
}
.page-about .about-value__card p:last-child {
  margin-bottom: 0;
}
.page-about .about-value__card--paper {
  background: var(--paper);
}
.page-about .about-value__card--paper :is(h3, p) {
  color: var(--text-dark);
}
.page-about .about-value__card--paper .about-link {
  color: var(--wood);
  border-bottom-color: rgba(122, 91, 62, .5);
}
.page-about .about-value__card--ink {
  background: var(--ink-layer);
}
.page-about .about-value__card--ink :is(h3, p) {
  color: rgba(244, 239, 228, .82);
}
.page-about .about-value__card--ink .h3 {
  color: var(--text-light);
}

/* 团队 */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(1.4rem, 3.6vw, 2.4rem);
}
.page-about .about-team__facts {
  margin: 1.2rem 0 0;
  display: grid;
  gap: 1px;
  background: var(--line-slate);
  border: 1px solid var(--line-slate);
  border-radius: var(--radius);
  overflow: hidden;
}
.page-about .about-team__facts > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: .8rem 1rem;
  background: var(--ink-deep);
}
.page-about .about-team__facts dt {
  font-size: .84rem;
  color: rgba(244, 239, 228, .68);
}
.page-about .about-team__facts dd {
  margin: 0;
  font-size: 1rem;
  letter-spacing: .04em;
  color: var(--amber);
}
.page-about .about-team__roles {
  display: grid;
  gap: .6rem;
}
.page-about .about-role {
  border: 1px solid var(--line-slate);
  border-radius: var(--radius);
  background: var(--ink-layer);
  overflow: hidden;
}
.page-about .about-role[open] {
  border-color: var(--line-amber);
}
.page-about .about-role summary {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .85rem 1rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-title);
  font-size: 1.02rem;
  color: var(--text-light);
}
.page-about .about-role summary::-webkit-details-marker {
  display: none;
}
.page-about .about-role summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--amber);
}
.page-about .about-role[open] summary::after {
  content: "–";
}
.page-about .about-role summary .numeral {
  font-size: .76rem;
  letter-spacing: .1em;
  color: var(--celadon);
}
.page-about .about-role p {
  margin: 0;
  padding: 0 1rem 1rem;
  font-size: .9rem;
  line-height: 1.76;
  color: rgba(244, 239, 228, .74);
}

/* 常来路径 */
.page-about .about-return {
  position: sticky;
  bottom: 1rem;
  z-index: 5;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .8rem 1.2rem;
  margin-top: clamp(1.6rem, 4vw, 2.6rem);
  padding: .9rem 1rem;
  background: var(--ink-layer);
  border: 1px solid var(--line-amber);
  border-radius: var(--radius);
  box-shadow: 0 12px 32px rgba(8, 24, 38, .6);
}
.page-about .about-return p {
  margin: 0;
  font-size: .86rem;
  line-height: 1.65;
  color: rgba(244, 239, 228, .78);
}

/* 断点 */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-stat {
    padding: 1.1rem 1.15rem;
  }
  .page-about .about-era__item {
    display: grid;
    grid-template-columns: 6.5rem minmax(0, 1fr);
    gap: 0 1.5rem;
    padding-left: 1.9rem;
  }
  .page-about .about-era__year {
    margin-bottom: 0;
    padding-top: .35rem;
    text-align: right;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    align-items: end;
    padding-top: clamp(1.6rem, 4vw, 2.8rem);
  }
  .page-about .about-hero__figure {
    margin-bottom: .5rem;
  }
  .page-about .about-space__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: start;
  }
  .page-about .about-flow {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    align-items: start;
  }
  .page-about .about-flow__figure {
    position: sticky;
    top: 1.5rem;
  }
  .page-about .about-net {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
  }
  .page-about .about-value__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-about .about-head {
    gap: .3rem 1.4rem;
  }
  .page-about .about-net__legend {
    gap: .65rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-net__dot,
  .page-about .about-net__hint,
  .page-about .about-net__item {
    transition: none;
  }
}