.page-about {
  --about-track: 78px;
  --about-gap: 22px;
  padding-top: calc(var(--cs-header-h) + 24px);
  background: var(--cs-cream);
  color: var(--cs-ink);
  font-family: var(--cs-body);
  overflow-x: hidden;
}

.page-about .cs-container {
  max-width: var(--cs-max);
}

.page-about .about-sec {
  padding: 56px 0;
}

.page-about #about-timeline,
.page-about #about-team,
.page-about #about-flow,
.page-about #about-habits,
.page-about #about-readers {
  scroll-margin-top: 96px;
}

.page-about [data-reveal].is-in {
  animation: aboutRise 420ms var(--cs-ease) both;
}

@keyframes aboutRise {
  from {
    transform: translateY(12px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-top: 8px;
}

.page-about .cs-breadcrumb {
  margin-bottom: 26px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 34px;
}

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

.page-about .about-hero__title {
  margin: 14px 0 20px;
  font-family: var(--cs-display);
  font-weight: 900;
  font-size: 32px;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--cs-ink);
}

.page-about .about-hero__accent {
  position: relative;
  color: var(--cs-red);
}

.page-about .about-hero__accent::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 4px;
  height: 4px;
  background: var(--cs-gold-light);
  z-index: -1;
}

.page-about .about-hero__text {
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--cs-brown);
}

.page-about .about-hero__marks {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin: 30px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--cs-line);
}

.page-about .about-hero__mark {
  display: flex;
  align-items: baseline;
  gap: 7px;
  margin: 0;
}

.page-about .about-hero__mark dt {
  font-size: 13px;
  color: var(--cs-brown);
  letter-spacing: 0.02em;
}

.page-about .about-hero__mark dd {
  margin: 0;
  font-size: 13px;
  color: var(--cs-brown);
}

.page-about .about-hero__mark dd b {
  font-family: var(--cs-mono);
  font-size: 21px;
  font-weight: 700;
  color: var(--cs-red);
  letter-spacing: -0.01em;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  padding-top: 14px;
}

.page-about .about-hero__figure::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 72px;
  height: 3px;
  background: var(--cs-gold);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--cs-line);
  background: var(--cs-card);
}

.page-about .about-hero__figure figcaption {
  margin-top: 11px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--cs-brown);
  letter-spacing: 0.02em;
}

/* ---------- 章节头 ---------- */

.page-about .about-sec-head {
  max-width: 720px;
  margin-bottom: 30px;
}

.page-about .about-sec-head .cs-h2 {
  margin: 10px 0 14px;
  font-family: var(--cs-display);
  font-weight: 900;
  font-size: 26px;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--cs-ink);
}

.page-about .about-sec-head .cs-lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--cs-brown);
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline__figure {
  margin: 0 0 42px;
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-top: 2px solid var(--cs-gold);
  border-bottom: 1px solid var(--cs-line);
  background: var(--cs-card);
}

.page-about .about-timeline__figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  color: var(--cs-brown);
}

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

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: var(--about-track) minmax(0, 1fr);
  gap: var(--about-gap);
  padding-bottom: 38px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: calc(var(--about-track) + var(--about-gap) / 2);
  top: 12px;
  bottom: 0;
  width: 1px;
  background: var(--cs-line);
}

.page-about .about-timeline__item:last-child::before {
  display: none;
}

.page-about .about-timeline__item::after {
  content: "";
  position: absolute;
  left: calc(var(--about-track) + var(--about-gap) / 2);
  top: 4px;
  width: 11px;
  height: 11px;
  margin-left: -5.5px;
  box-sizing: border-box;
  border: 2px solid var(--cs-gold);
  border-radius: 50%;
  background: var(--cs-cream);
}

.page-about .about-timeline__year {
  padding-top: 1px;
  font-family: var(--cs-mono);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: var(--cs-brown);
  text-align: right;
}

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

.page-about .about-timeline__h {
  margin: 0 0 8px;
  font-family: var(--cs-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--cs-ink);
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--cs-brown);
}

/* ---------- 团队 ---------- */

.page-about .about-team__layout {
  display: grid;
  gap: 32px;
}

.page-about .about-team__cards {
  display: grid;
  gap: 18px;
}

.page-about .about-folder {
  position: relative;
  padding: 22px 20px 20px;
  background: var(--cs-card);
  border: 1px solid var(--cs-line);
  border-radius: 0;
  box-shadow: 0 1px 0 rgba(23, 20, 18, 0.03);
  transition: transform 260ms var(--cs-ease), border-color 260ms var(--cs-ease), box-shadow 260ms var(--cs-ease);
}

.page-about .about-folder::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 0;
  height: 3px;
  background: var(--cs-gold-light);
  transition: width 340ms var(--cs-ease);
}

.page-about .about-folder:hover,
.page-about .about-folder:focus-within {
  transform: translateY(-3px);
  border-color: var(--cs-gold);
  box-shadow: 0 8px 20px rgba(23, 20, 18, 0.07);
}

.page-about .about-folder:hover::before,
.page-about .about-folder:focus-within::before {
  width: calc(100% + 2px);
}

.page-about .about-folder:focus {
  outline: 2px solid var(--cs-red);
  outline-offset: 2px;
}

.page-about .about-folder__tag {
  display: inline-block;
  margin-bottom: 13px;
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-about .about-folder__h {
  margin: 0 0 10px;
  font-family: var(--cs-display);
  font-size: 19px;
  font-weight: 700;
  color: var(--cs-ink);
}

.page-about .about-folder p {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--cs-brown);
}

.page-about .about-folder__list {
  list-style: none;
  margin: 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--cs-line);
  display: grid;
  gap: 8px;
}

.page-about .about-folder__list li {
  position: relative;
  padding-left: 15px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--cs-ink);
}

.page-about .about-folder__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--cs-gold);
  transform: rotate(45deg);
}

.page-about .about-team__media {
  margin: 0;
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--cs-line);
  background: var(--cs-card);
}

.page-about .about-team__media figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--cs-brown);
}

/* ---------- 流程 ---------- */

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-flow__step {
  position: relative;
  padding: 22px 20px 20px;
  background: var(--cs-card);
  border: 1px solid var(--cs-line);
  border-top: 3px solid var(--cs-gold);
  border-radius: 0;
}

.page-about .about-flow__idx {
  display: block;
  margin-bottom: 10px;
  font-family: var(--cs-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--cs-red);
}

.page-about .about-flow__h {
  margin: 0 0 10px;
  font-family: var(--cs-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--cs-ink);
}

.page-about .about-flow__step p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--cs-brown);
}

.page-about .about-flow__step .about-flow__out {
  margin: 0;
  padding-top: 11px;
  border-top: 1px dashed var(--cs-line);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.7;
  color: var(--cs-jade);
}

.page-about .about-flow__tail {
  margin: 28px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--cs-brown);
}

.page-about a {
  color: var(--cs-red);
  text-decoration: none;
  border-bottom: 1px solid var(--cs-gold);
  transition: color 200ms var(--cs-ease), border-color 200ms var(--cs-ease);
}

.page-about a:hover,
.page-about a:focus-visible {
  color: var(--cs-red-deep);
  border-bottom-color: var(--cs-red-deep);
}

/* ---------- 做事习惯 ---------- */

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

.page-about .about-habit {
  padding-top: 18px;
  border-top: 2px solid var(--cs-gold);
}

.page-about .about-habit h3 {
  margin: 0 0 10px;
  font-family: var(--cs-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--cs-ink);
}

.page-about .about-habit p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--cs-brown);
}

/* ---------- 用户 ---------- */

.page-about .about-readers__grid {
  display: grid;
  gap: 34px;
}

.page-about .about-readers__grid .cs-h2 {
  margin: 10px 0 16px;
  font-family: var(--cs-display);
  font-weight: 900;
  font-size: 26px;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--cs-ink);
}

.page-about .about-readers__text {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--cs-brown);
}

.page-about .about-readers__stats {
  margin: 0;
  align-self: start;
}

.page-about .about-readers__stat {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  padding: 17px 0;
  border-bottom: 1px solid var(--cs-line);
}

.page-about .about-readers__stat:first-child {
  border-top: 1px solid var(--cs-line);
}

.page-about .about-readers__stat dt {
  font-size: 14px;
  line-height: 1.6;
  color: var(--cs-brown);
}

.page-about .about-readers__stat dd {
  margin: 0;
  font-family: var(--cs-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--cs-red);
  white-space: nowrap;
}

.page-about .about-closing {
  margin-top: 52px;
  padding-top: 30px;
  border-top: 2px solid var(--cs-gold);
}

.page-about .about-closing p {
  max-width: 760px;
  margin: 0 0 18px;
  font-size: 17px;
  line-height: 1.95;
  color: var(--cs-ink);
}

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

/* ---------- 响应式 ---------- */

@media (max-width: 560px) {
  .page-about {
    --about-track: 54px;
    --about-gap: 14px;
  }

  .page-about .about-timeline__year {
    font-size: 12.5px;
  }

  .page-about .about-hero__marks {
    gap: 10px 18px;
  }

  .page-about .about-readers__stat dd {
    font-size: 19px;
  }
}

@media (min-width: 700px) {
  .page-about .about-sec {
    padding: 72px 0;
  }

  .page-about .about-hero__title {
    font-size: 46px;
  }

  .page-about .about-sec-head .cs-h2,
  .page-about .about-readers__grid .cs-h2 {
    font-size: 32px;
  }

  .page-about .about-team__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-habits {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 34px 44px;
  }

  .page-about .about-timeline__h {
    font-size: 20px;
  }
}

@media (min-width: 880px) {
  .page-about .about-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 980px) {
  .page-about {
    padding-top: calc(var(--cs-header-h) + 52px);
  }

  .page-about .about-sec {
    padding: 88px 0;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: end;
  }

  .page-about .about-hero__title {
    font-size: 58px;
  }

  .page-about .about-hero__figure {
    padding-top: 18px;
  }

  .page-about .about-sec-head .cs-h2,
  .page-about .about-readers__grid .cs-h2 {
    font-size: 36px;
  }

  .page-about .about-sec-head {
    margin-bottom: 40px;
  }

  .page-about .about-timeline__figure {
    margin-bottom: 52px;
  }

  .page-about .about-readers__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
  }
}

@media (min-width: 1040px) {
  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 44px;
    align-items: start;
  }

  .page-about .about-team__media {
    position: sticky;
    top: 96px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal].is-in {
    animation: none;
  }

  .page-about .about-folder,
  .page-about .about-folder::before,
  .page-about a {
    transition: none;
  }

  .page-about .about-folder:hover,
  .page-about .about-folder:focus-within {
    transform: none;
  }
}