.page-about {
  --ab-line: rgba(142, 148, 153, .34);
  --ab-hair: rgba(142, 148, 153, .2);
  --ab-lime: rgba(198, 242, 78, .5);
  --ab-body: rgba(242, 237, 230, .8);
  background: var(--ink);
  color: var(--c-text);
}

/* 面包屑 */
.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 18px;
  padding-bottom: 18px;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .08em;
  color: var(--c-dim);
}

.page-about .about-crumb a {
  color: var(--c-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .about-crumb a:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-about .breadcrumb__sep {
  color: var(--rock);
}

/* 页头摄影带 */
.page-about .about-mast {
  background: var(--ink);
}

.page-about .about-mast__band {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-top: 2px solid var(--rock);
  border-bottom: 2px solid var(--rock);
}

.page-about .about-mast__band img {
  display: block;
  width: 100%;
  height: clamp(150px, 30vw, 350px);
  object-fit: cover;
  object-position: center 42%;
}

.page-about .about-mast__band::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(110% 100% at 8% 100%, rgba(194, 84, 43, .45), transparent 62%),
    linear-gradient(180deg, rgba(14, 16, 19, .08) 0%, rgba(14, 16, 19, .9) 100%);
}

.page-about .about-mast__head {
  padding: clamp(28px, 5vw, 54px) 0 clamp(36px, 6vw, 76px);
}

.page-about .about-mast__kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .14em;
  color: var(--ochre-lt);
}

.page-about .about-mast__title {
  margin: 0 0 18px;
  font-size: clamp(1.95rem, 6vw, 4.4rem);
  font-weight: 900;
  line-height: 1.03;
  letter-spacing: -.025em;
  max-width: 16ch;
}

.page-about .about-mast__lede {
  margin: 0;
  max-width: 58ch;
  font-size: 1.02rem;
  line-height: 1.72;
  color: var(--ab-body);
}

/* 章节通用 */
.page-about .about-sec {
  padding: var(--pad-section) 0;
  border-top: 2px solid var(--rock);
}

.page-about .about-sec--indigo {
  background: var(--indigo);
}

.page-about .about-sec--pine {
  background: var(--pine);
}

.page-about .about-sec--paper {
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

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

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

.page-about .about-sec__num {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1rem, 2vw, 1.2rem);
  letter-spacing: .16em;
  color: var(--ochre);
}

.page-about .about-sec__num::after {
  content: "";
  display: block;
  width: 44px;
  height: 3px;
  margin-top: 10px;
  background: var(--ochre);
}

.page-about .about-sec__title {
  margin: 0;
  font-size: clamp(1.45rem, 3.6vw, 2.5rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.02em;
  max-width: 22ch;
}

.page-about .about-grid__body p {
  margin: 0 0 14px;
  max-width: 64ch;
  font-size: 1rem;
  line-height: 1.72;
  color: var(--ab-body);
}

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

.page-about .about-sec--paper .about-grid__body p {
  color: rgba(14, 16, 19, .78);
}

.page-about .about-grid__body a,
.page-about .about-tree__foot a,
.page-about .about-coop__txt a {
  color: var(--ochre-lt);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 131, 79, .45);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .about-grid__body a:hover,
.page-about .about-tree__foot a:hover,
.page-about .about-coop__txt a:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

/* 窄栏注释 */
.page-about .about-note {
  margin: 26px 0 0;
  padding: 18px 20px;
  border: 2px solid var(--rock);
  border-left: 4px solid var(--ochre);
  background: rgba(22, 24, 29, .75);
  box-shadow: 5px 5px 0 rgba(0, 0, 0, .45);
}

.page-about .about-note__k {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--c-dim);
}

.page-about .about-note__v {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--ochre);
}

.page-about .about-note__d {
  margin: 0;
  font-size: .86rem;
  line-height: 1.62;
  color: var(--ab-body);
}

/* 时间轴 */
.page-about .about-timeline {
  list-style: none;
  position: relative;
  margin: 34px 0 0;
  padding: 0 0 0 26px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, rgba(198, 242, 78, .78), rgba(198, 242, 78, .08));
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 32px;
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 8px;
  width: 11px;
  height: 11px;
  background: var(--ochre);
  box-shadow: 0 0 0 4px rgba(194, 84, 43, .18);
}

.page-about .about-timeline__year {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: .1em;
  color: var(--lime);
}

.page-about .about-timeline__h {
  margin: 0 0 8px;
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  font-weight: 700;
  line-height: 1.32;
}

.page-about .about-timeline__card p {
  margin: 0;
  max-width: 62ch;
  font-size: .95rem;
  line-height: 1.7;
  color: var(--ab-body);
}

/* 团队 */
.page-about .about-team__shot {
  margin: 30px 0 0;
  overflow: hidden;
  border: 2px solid var(--rock);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, .5);
}

.page-about .about-team__shot img {
  display: block;
  width: 100%;
  height: clamp(160px, 30vw, 320px);
  object-fit: cover;
  object-position: center 38%;
}

.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: 30px;
  border-top: 1px solid var(--ab-line);
  border-bottom: 1px solid var(--ab-line);
}

.page-about .about-team__card {
  position: relative;
  padding: 24px 0;
  border-bottom: 1px solid var(--ab-line);
}

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

.page-about .about-team__idx {
  position: absolute;
  top: 22px;
  right: 2px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--rock-lt);
  transform-origin: top right;
  transition: transform .18s var(--ease), color .18s var(--ease);
}

.page-about .about-team__card:hover .about-team__idx {
  transform: scale(1.7);
  color: var(--lime);
}

.page-about .about-team__num {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: .95;
  letter-spacing: -.04em;
  color: var(--ochre);
}

.page-about .about-team__role {
  margin: 0 0 10px;
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: .02em;
}

.page-about .about-team__card p:last-child {
  margin: 0;
  max-width: 42ch;
  font-size: .94rem;
  line-height: 1.7;
  color: var(--ab-body);
}

/* 分类体系 */
.page-about .about-tree {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  border-top: 1px solid var(--ab-hair);
}

.page-about .about-tree__row {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--ab-hair);
}

.page-about .about-tree__row--2 {
  padding-left: 30px;
}

.page-about .about-tree__row--3 {
  padding-left: 60px;
}

.page-about .about-tree__row--4 {
  padding-left: 90px;
}

.page-about .about-tree__row--2::before,
.page-about .about-tree__row--3::before,
.page-about .about-tree__row--4::before {
  content: "";
  position: absolute;
  top: 50%;
  width: 12px;
  height: 2px;
  background: var(--ab-lime);
  transform: translateY(-50%);
}

.page-about .about-tree__row--2::before {
  left: 8px;
}

.page-about .about-tree__row--3::before {
  left: 38px;
}

.page-about .about-tree__row--4::before {
  left: 68px;
}

.page-about .about-tree__key {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: .76rem;
  letter-spacing: .14em;
  color: var(--lime);
}

.page-about .about-tree__val {
  font-size: .98rem;
  line-height: 1.6;
  color: var(--ab-body);
}

.page-about .about-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 26px;
}

.page-about .about-tags__label {
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .1em;
  color: var(--c-dim);
  margin-right: 4px;
}

.page-about .about-tree__foot {
  margin: 24px 0 0;
  max-width: 62ch;
  font-size: .95rem;
  line-height: 1.72;
  color: var(--ab-body);
}

/* 合作生态 */
.page-about .about-stat-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 32px;
  padding-bottom: 26px;
  border-bottom: 2px solid var(--rock);
}

.page-about .about-stat__n {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2.4rem, 8vw, 3.8rem);
  line-height: .95;
  letter-spacing: -.05em;
  color: var(--ochre);
}

.page-about .about-stat__k {
  display: block;
  margin-top: 8px;
  font-size: .86rem;
  letter-spacing: .04em;
  color: var(--c-dim);
}

.page-about .about-coop {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-coop__item {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 14px;
  align-items: start;
  padding: 24px 0;
  border-bottom: 1px solid var(--ab-hair);
}

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

.page-about .about-coop__no {
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: 1.45rem;
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--ochre);
}

.page-about .about-coop__txt h3 {
  margin: 0 0 8px;
  font-size: 1.06rem;
  font-weight: 700;
  line-height: 1.35;
}

.page-about .about-coop__txt p {
  margin: 0;
  max-width: 60ch;
  font-size: .95rem;
  line-height: 1.7;
  color: var(--ab-body);
}

/* 表彰与工作坊 */
.page-about .about-workshop {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-about .about-workshop li {
  margin-bottom: 14px;
  padding: 12px 0 12px 16px;
  border-left: 3px solid var(--ochre);
  font-size: .95rem;
  line-height: 1.66;
  color: rgba(14, 16, 19, .8);
}

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

.page-about .about-workshop strong {
  font-weight: 700;
  margin-right: 8px;
}

.page-about .about-workshop__shot {
  margin: 28px 0 0;
  max-width: 420px;
  overflow: hidden;
  border: 2px solid var(--ink);
  box-shadow: 8px 8px 0 var(--ochre);
}

.page-about .about-workshop__shot img {
  display: block;
  width: 100%;
  height: auto;
}

/* 结尾通道 */
.page-about .about-cta {
  padding: var(--pad-section) 0;
  border-top: 2px solid var(--ochre);
  background:
    linear-gradient(140deg, rgba(194, 84, 43, .3) 0%, rgba(42, 36, 64, .92) 55%, rgba(14, 16, 19, 1) 100%);
}

.page-about .about-cta__inner {
  max-width: 780px;
}

.page-about .about-cta h2 {
  margin: 0 0 16px;
  font-size: clamp(1.55rem, 4vw, 2.55rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -.02em;
}

.page-about .about-cta p {
  margin: 0 0 26px;
  max-width: 56ch;
  font-size: 1rem;
  line-height: 1.72;
  color: var(--ab-body);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* 桌面栅格 */
@media (min-width: 900px) {
  .page-about .about-grid {
    grid-template-columns: repeat(12, 1fr);
    gap: 28px;
  }

  .page-about .about-grid__mark {
    grid-column: 1 / span 4;
  }

  .page-about .about-grid__body {
    grid-column: 6 / span 7;
  }

  .page-about .about-grid--split .about-grid__mark {
    grid-column: 1 / span 4;
  }

  .page-about .about-grid--split .about-grid__body {
    grid-column: 5 / span 5;
  }

  .page-about .about-grid--split .about-grid__fig {
    grid-column: 10 / span 3;
    align-self: start;
  }

  .page-about .about-workshop__shot {
    margin-top: 0;
    max-width: none;
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__card,
  .page-about .about-timeline__item:nth-child(even) .about-timeline__year {
    margin-left: 14%;
  }

  .page-about .about-team {
    grid-template-columns: 1.15fr .95fr .85fr;
  }

  .page-about .about-team__card {
    padding: 30px 24px;
    border-bottom: 0;
    border-right: 1px solid var(--ab-line);
  }

  .page-about .about-team__card:first-child {
    padding-left: 0;
  }

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

  .page-about .about-team__idx {
    top: 28px;
    right: 24px;
  }

  .page-about .about-team__card:last-child .about-team__idx {
    right: 0;
  }

  .page-about .about-stat-row {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-stat-row .about-stat:first-child {
    grid-column: 1 / span 2;
  }

  .page-about .about-stat-row .about-stat:last-child {
    grid-column: 3 / span 2;
  }
}

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