.page-about {
  --about-line: rgba(28, 26, 23, .16);
  --about-gap: 28px;
}

.page-about [id] {
  scroll-margin-top: calc(var(--frame-top) + 16px);
}

/* 面包屑 */
.page-about .breadcrumb {
  padding-top: 20px;
  padding-bottom: 4px;
}
.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--ink-2);
}
.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  opacity: .45;
}
.page-about .breadcrumb a {
  color: var(--ink-2);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 160ms var(--ease), color 160ms var(--ease);
}
.page-about .breadcrumb a:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--ink);
}

/* 首屏 */
.page-about .about-hero {
  padding: 24px 0 12px;
}
.page-about .about-hero__grid {
  display: grid;
  gap: 24px;
}
.page-about .about-hero h1 {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(32px, 7.2vw, 58px);
  line-height: 1.08;
  letter-spacing: -.02em;
  margin: 10px 0 18px;
  max-width: 16ch;
  color: var(--ink);
}
.page-about .about-hero .lede {
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-2);
  max-width: 54ch;
  margin: 0;
}
.page-about .about-hero__season {
  display: flex;
  gap: 6px;
  margin-top: 26px;
}
.page-about .about-hero__swatch {
  width: 46px;
  height: 4px;
  display: block;
}
.page-about .about-hero__swatch--spring { background: var(--spring); }
.page-about .about-hero__swatch--summer { background: var(--summer); }
.page-about .about-hero__swatch--autumn { background: var(--autumn); }
.page-about .about-hero__swatch--winter { background: var(--winter); }

.page-about .about-hero__side .note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--ink-2);
  text-transform: uppercase;
}
.page-about .about-hero__toc {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  border-top: 1px solid var(--about-line);
}
.page-about .about-hero__toc li {
  border-bottom: 1px solid var(--about-line);
}
.page-about .about-hero__toc a {
  position: relative;
  display: block;
  padding: 10px 0 10px 16px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink);
  text-decoration: none;
  transition: color 160ms var(--ease), padding-left 160ms var(--ease);
}
.page-about .about-hero__toc a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 6px;
  height: 6px;
  margin-top: -3px;
  background: var(--accent);
}
.page-about .about-hero__toc a:hover {
  color: var(--accent);
  padding-left: 20px;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) 236px;
    column-gap: 52px;
    align-items: start;
  }
}

/* 左窄右宽长文 */
.page-about .about-split {
  padding: 44px 0 40px;
}
.page-about .about-split__grid {
  display: grid;
  gap: 26px;
}
.page-about .about-split__aside {
  border-top: 2px solid var(--autumn);
  padding-top: 14px;
}
.page-about .about-split__aside .eyebrow {
  margin: 0 0 12px;
}
.page-about .about-split__aside .note {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.75;
  letter-spacing: .02em;
  color: var(--ink-2);
}
.page-about .about-split__body h2 {
  margin: 0 0 16px;
  font-size: clamp(22px, 4.4vw, 34px);
  line-height: 1.28;
  letter-spacing: -.015em;
  max-width: 20ch;
}
.page-about .about-split__body p {
  margin: 0 0 1.2em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-2);
  max-width: 58ch;
}
.page-about .about-quote {
  margin: 26px 0;
  padding: 6px 0 6px 18px;
  border-left: 2px solid var(--autumn);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.62;
  letter-spacing: -.01em;
  color: var(--ink);
  max-width: 46ch;
}
.page-about .about-quote footer {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .04em;
  color: var(--ink-2);
}
.page-about .about-split__figure {
  margin: 24px 0 0;
}
.page-about .about-split__figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
}

@media (min-width: 900px) {
  .page-about .about-split__grid {
    grid-template-columns: minmax(150px, 3fr) minmax(0, 8fr);
    column-gap: 48px;
  }
  .page-about .about-split__aside {
    position: sticky;
    top: calc(var(--frame-top) + 20px);
  }
  .page-about .about-split__body {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    column-gap: 36px;
    align-items: start;
  }
  .page-about .about-split__body > h2,
  .page-about .about-split__body > p,
  .page-about .about-split__body > .about-quote {
    grid-column: 1;
  }
  .page-about .about-split__figure {
    grid-column: 2;
    grid-row: 1 / span 4;
    margin: 6px 0 0;
  }
}

/* 时间轴 */
.page-about .about-timeline {
  padding: 40px 0;
  border-top: 1px solid var(--about-line);
}
.page-about .about-timeline .section-head {
  margin-bottom: 22px;
}
.page-about .about-timeline__figure {
  margin: 0 0 30px;
  border: 1px solid var(--about-line);
}
.page-about .about-timeline__figure img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}
.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 20px;
  border-left: 1px solid var(--about-line);
}
.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 26px 20px;
}
.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline__dot {
  position: absolute;
  left: -25px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--autumn-soft);
  box-shadow: 0 0 0 3px var(--paper);
}
.page-about .about-timeline__date {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--autumn);
  margin-bottom: 4px;
}
.page-about .about-timeline__item h3 {
  margin: 0 0 6px;
  font-size: 16px;
  line-height: 1.45;
  letter-spacing: -.01em;
}
.page-about .about-timeline__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-2);
  max-width: 42ch;
}

@media (min-width: 1040px) {
  .page-about .about-timeline__list {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 22px;
    padding: 0;
    border-left: 0;
    border-top: 1px solid var(--about-line);
    padding-top: 0;
  }
  .page-about .about-timeline__item {
    padding: 26px 6px 0 0;
  }
  .page-about .about-timeline__dot {
    left: 0;
    top: -5px;
  }
}

/* 团队 */
.page-about .about-team {
  padding: 40px 0;
  border-top: 1px solid var(--about-line);
}
.page-about .about-team__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 16px 0 24px;
  padding: 0;
}
.page-about .about-team__grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.page-about .about-team__card {
  padding: 20px 18px 22px;
  border: 1px solid var(--about-line);
  background: var(--paper);
  transition: background 160ms var(--ease), border-color 160ms var(--ease), box-shadow 160ms var(--ease);
}
.page-about .about-team__card .tag {
  margin: 0;
}
.page-about .about-team__card h3 {
  margin: 12px 0 10px;
  font-size: 17px;
  line-height: 1.5;
  letter-spacing: -.01em;
}
.page-about .about-team__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-2);
}
.page-about .about-team__card:hover {
  border-color: var(--ink);
  box-shadow: var(--shadow-soft);
}
.page-about .about-team__card:target {
  background: var(--paper-2);
  border-color: var(--ink);
}

/* 双周节奏 */
.page-about .about-cycle {
  padding: 40px 0;
  border-top: 1px solid var(--about-line);
}
.page-about .about-cycle__grid {
  display: grid;
  gap: 26px;
}
.page-about .about-cycle__aside {
  border-top: 2px solid var(--summer);
  padding-top: 14px;
}
.page-about .about-cycle__aside .eyebrow {
  margin: 0 0 12px;
}
.page-about .about-cycle__aside .note {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.75;
  letter-spacing: .02em;
  color: var(--ink-2);
}
.page-about .about-cycle__body h2 {
  margin: 0 0 14px;
  font-size: clamp(22px, 4.4vw, 34px);
  line-height: 1.28;
  letter-spacing: -.015em;
  max-width: 18ch;
}
.page-about .about-cycle__body > p {
  margin: 0 0 8px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-2);
  max-width: 56ch;
}
.page-about .about-cycle__steps {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid var(--about-line);
}
.page-about .about-cycle__steps li {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 0;
  border-bottom: 1px solid var(--about-line);
}
.page-about .about-cycle__steps .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--summer);
  padding-top: 3px;
}
.page-about .about-cycle__steps strong {
  display: block;
  font-size: 15px;
  margin-bottom: 4px;
  letter-spacing: -.01em;
}
.page-about .about-cycle__steps p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-2);
}

@media (min-width: 900px) {
  .page-about .about-cycle__grid {
    grid-template-columns: minmax(160px, 4fr) minmax(0, 8fr);
    column-gap: 48px;
  }
  .page-about .about-cycle__aside {
    position: sticky;
    top: calc(var(--frame-top) + 20px);
  }
}

/* 四季色签 */
.page-about .about-seasons {
  padding: 40px 0;
  border-top: 1px solid var(--about-line);
}
.page-about .about-seasons__figure {
  margin: 0 0 28px;
  border: 1px solid var(--about-line);
}
.page-about .about-seasons__figure img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}
.page-about .about-seasons__grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}
.page-about .about-season {
  border: 1px solid var(--about-line);
  background: var(--paper);
}
.page-about .about-season__chip {
  display: block;
  height: 52px;
}
.page-about .about-season--spring .about-season__chip { background: var(--spring); }
.page-about .about-season--summer .about-season__chip { background: var(--summer); }
.page-about .about-season--autumn .about-season__chip { background: var(--autumn); }
.page-about .about-season--winter .about-season__chip { background: var(--winter); }
.page-about .about-season__body {
  padding: 13px 14px 16px;
}
.page-about .about-season__body h3 {
  margin: 0 0 6px;
  font-size: 15px;
  letter-spacing: -.01em;
}
.page-about .about-season__body p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-2);
}
.page-about .about-season__hex {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--ink-2);
}
.page-about .about-seasons__foot {
  margin: 26px 0 0;
  padding-left: 18px;
  border-left: 2px solid var(--spring);
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-2);
  max-width: 62ch;
}

/* 四端适配 */
.page-about .about-ends {
  padding: 40px 0;
  border-top: 1px solid var(--about-line);
}
.page-about .about-ends__list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}
.page-about .about-ends__list li {
  display: grid;
  gap: 8px;
  padding: 18px 0;
  border-top: 1px solid var(--about-line);
}
.page-about .about-ends__list li:last-child {
  border-bottom: 1px solid var(--about-line);
}
.page-about .about-ends__name {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -.01em;
}
.page-about .about-ends__badge {
  width: 8px;
  height: 8px;
  display: block;
  flex: none;
}
.page-about .about-ends__badge--spring { background: var(--spring); }
.page-about .about-ends__badge--summer { background: var(--summer); }
.page-about .about-ends__badge--autumn { background: var(--autumn); }
.page-about .about-ends__badge--winter { background: var(--winter); }
.page-about .about-ends__list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-2);
  max-width: 62ch;
}

@media (min-width: 760px) {
  .page-about .about-ends__list li {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 28px;
    align-items: baseline;
  }
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 28px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}
.page-about .about-stats__item {
  background: var(--paper);
  padding: 18px 16px;
}
.page-about .about-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  letter-spacing: -.01em;
  color: var(--ink);
}
.page-about .about-stats__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-2);
}

@media (min-width: 800px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* 结尾导航 */
.page-about .about-next {
  padding: 44px 0 56px;
  border-top: 1px solid var(--about-line);
}
.page-about .about-next__inner h2 {
  margin: 0 0 10px;
  font-size: clamp(22px, 4.4vw, 32px);
  line-height: 1.28;
  letter-spacing: -.015em;
}
.page-about .about-next__inner p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-2);
  max-width: 46ch;
}
.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__toc a,
  .page-about .about-team__card,
  .page-about .breadcrumb a {
    transition: none;
  }
}