.page-about {
  --about-ink: rgba(241, 231, 214, 0.86);
  --about-ink-dim: rgba(241, 231, 214, 0.6);
  --about-tl-pad: clamp(1rem, 4vw, 2.5rem);
  background-color: var(--ink-sea);
  color: var(--about-ink);
  padding: clamp(1.25rem, 3vw, 2.25rem) 0 0;
  overflow-x: hidden;
}

.page-about .index-label {
  color: var(--gold);
}

.page-about .index-label--dark {
  color: var(--cinnabar);
}

/* ---------- 首屏 ---------- */
.page-about .about-lede {
  display: grid;
  gap: clamp(1.75rem, 5vw, 3.25rem);
  padding: clamp(1.25rem, 4vw, 2.5rem) 0 clamp(2.25rem, 6vw, 4rem);
}

.page-about .about-lede__title {
  margin: 0.6rem 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-h1);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--paper-white);
}

.page-about .about-lede__creed {
  margin: 0.9rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 3vw, 1.6rem);
  font-weight: 600;
  line-height: 1.5;
  color: var(--gold-bright);
}

.page-about .about-lede__intro {
  margin: 1.35rem 0 0;
  max-width: 40em;
  font-size: var(--fs-body);
  line-height: 1.9;
  color: var(--about-ink);
}

.page-about .about-lede__intro--sub {
  margin-top: 1rem;
  color: var(--about-ink-dim);
}

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

.page-about .about-lede__media img,
.page-about .about-origin__texture img,
.page-about .about-editorial__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

@media (min-width: 900px) {
  .page-about .about-lede {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: end;
    padding-top: clamp(2rem, 4vw, 3rem);
  }
}

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  display: flex;
  gap: clamp(1rem, 3vw, 1.85rem);
  overflow-x: auto;
  padding: 0.9rem 0 1.1rem;
  border-top: 1px solid var(--line-gold);
  border-bottom: 1px solid var(--line-gold);
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-index__link {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--fs-index);
  letter-spacing: 0.12em;
  color: var(--stone);
  text-decoration: none;
  white-space: nowrap;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible,
.page-about .about-index__link[aria-current="true"] {
  color: var(--gold-bright);
  border-bottom-color: var(--cinnabar);
}

/* ---------- 时间轴 ---------- */
.page-about .about-origin {
  padding: clamp(3rem, 8vw, 5.5rem) 0 clamp(2rem, 5vw, 3rem);
}

.page-about .about-origin__head {
  margin-bottom: clamp(1.75rem, 5vw, 3rem);
  max-width: 46em;
}

.page-about .about-origin__title,
.page-about .about-columns__title,
.page-about .about-team__title,
.page-about .about-craft__title,
.page-about .about-tenets__title,
.page-about .about-next__title,
.page-about .about-editorial__title {
  margin: 0.7rem 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 700;
  line-height: 1.3;
  color: var(--paper-white);
}

.page-about .about-origin__lead,
.page-about .about-columns__lead,
.page-about .about-tenets__lead,
.page-about .about-next__lead {
  margin: 0.9rem 0 0;
  font-size: var(--fs-body);
  line-height: 1.9;
  color: var(--about-ink-dim);
}

.page-about .about-origin__body {
  display: grid;
  gap: clamp(2rem, 5vw, 3rem);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--about-tl-pad);
  border-left: 1px solid var(--line-gold-strong);
  display: grid;
  gap: clamp(2rem, 5vw, 3.25rem);
}

.page-about .about-timeline__item {
  position: relative;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--about-tl-pad) - 3px);
  top: 0.7em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(201, 162, 74, 0.14);
  transition: background 0.22s ease, box-shadow 0.22s ease;
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus-within::before {
  background: var(--gold-bright);
  box-shadow: 0 0 0 5px rgba(231, 200, 125, 0.22);
}

.page-about .about-timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.1rem, 8.5vw, 3.6rem);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.02em;
  color: rgba(201, 162, 74, 0.42);
  transition: color 0.22s ease;
}

.page-about .about-timeline__item:hover .about-timeline__year,
.page-about .about-timeline__item:focus-within .about-timeline__year {
  color: var(--gold-bright);
}

.page-about .about-timeline__head {
  margin: 0.85rem 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 600;
  color: var(--paper-white);
}

.page-about .about-timeline__text {
  margin: 0.6rem 0 0;
  max-width: 42em;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--about-ink);
}

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

.page-about .about-origin__texture img {
  aspect-ratio: 1 / 1;
}

@media (min-width: 960px) {
  .page-about .about-origin__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 280px);
    align-items: start;
  }
}

/* ---------- 选题（暖宣纸反转区） ---------- */
.page-about .about-editorial {
  position: relative;
  margin: clamp(2rem, 6vw, 3.5rem) 0;
  padding: clamp(2.25rem, 6vw, 4rem) clamp(1.25rem, 5vw, 3.25rem);
  background: var(--paper-warm);
  color: var(--ink-deep);
  border-radius: 2px;
  box-shadow: var(--shadow-paper);
}

.page-about .about-editorial__grid {
  display: grid;
  gap: clamp(2rem, 5vw, 3rem);
}

.page-about .about-editorial__title {
  color: var(--ink-sea);
}

.page-about .about-editorial__lead {
  margin: 0.9rem 0 1.75rem;
  max-width: 42em;
  font-size: var(--fs-body);
  line-height: 1.9;
  color: rgba(17, 40, 61, 0.82);
}

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

.page-about .about-editorial__media img {
  aspect-ratio: 3 / 2;
}

.page-about .about-editorial .media-frame__caption {
  color: rgba(17, 40, 61, 0.62);
}

.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.15rem;
}

.page-about .about-steps__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0 1rem;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--line-ink);
}

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

.page-about .about-steps__num {
  font-family: var(--font-mono);
  font-size: var(--fs-index);
  letter-spacing: 0.16em;
  color: var(--cinnabar);
  padding-top: 0.35rem;
}

.page-about .about-steps__head {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--ink-sea);
}

.page-about .about-steps__body p {
  margin: 0.5rem 0 0;
  font-size: 0.98rem;
  line-height: 1.85;
  color: rgba(17, 40, 61, 0.8);
}

@media (min-width: 940px) {
  .page-about .about-editorial__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: start;
  }
}

/* ---------- 六个栏目 ---------- */
.page-about .about-columns {
  padding: clamp(2rem, 6vw, 3.5rem) 0;
}

.page-about .about-columns__head {
  max-width: 48em;
  margin-bottom: clamp(1.75rem, 5vw, 2.75rem);
}

.page-about .about-columns__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
}

.page-about .about-col-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding: 1.5rem 1.4rem 1.6rem;
  background: var(--ink-deep);
  border: 1px solid var(--line-gold);
  border-radius: 2px;
  transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
}

.page-about .about-col-card:hover,
.page-about .about-col-card:focus-within {
  transform: translateY(-4px);
  border-color: var(--line-gold-strong);
  box-shadow: var(--shadow-lift);
}

.page-about .about-col-card__num {
  font-family: var(--font-mono);
  font-size: var(--fs-index);
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .about-col-card__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.22rem;
  font-weight: 600;
}

.page-about .about-col-card__link {
  color: var(--paper-white);
  text-decoration: none;
}

.page-about .about-col-card__link::after {
  content: "";
  position: absolute;
  inset: 0;
}

.page-about .about-col-card__link:hover,
.page-about .about-col-card__link:focus-visible {
  color: var(--gold-bright);
}

.page-about .about-col-card__desc {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--about-ink);
}

.page-about .about-col-card__meta {
  margin-top: auto;
  padding-top: 0.9rem;
  border-top: 1px solid var(--line-stone);
  font-family: var(--font-mono);
  font-size: var(--fs-index);
  letter-spacing: 0.12em;
  color: var(--stone);
}

@media (min-width: 620px) {
  .page-about .about-columns__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .page-about .about-columns__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  margin-top: clamp(1rem, 4vw, 2rem);
  padding: clamp(2.5rem, 7vw, 4.5rem) 0;
  border-top: 1px solid var(--line-gold);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
}

.page-about .about-team__figure {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.page-about .about-team__count {
  font-family: var(--font-mono);
  font-size: clamp(3.5rem, 16vw, 6.5rem);
  font-weight: 600;
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--gold-bright);
}

.page-about .about-team__label {
  margin: 0.4rem 0 0;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--paper-white);
}

.page-about .about-team__sub {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-index);
  letter-spacing: 0.12em;
  color: var(--stone);
}

.page-about .about-team__copy p {
  margin: 0.9rem 0 0;
  font-size: var(--fs-body);
  line-height: 1.9;
  color: var(--about-ink);
}

.page-about .about-team__list {
  list-style: none;
  margin: 1.35rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.page-about .about-team__list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--about-ink);
}

.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 8px;
  height: 1px;
  background: var(--jade-light);
}

.page-about .about-team__list strong {
  color: var(--paper-white);
  font-weight: 600;
}

.page-about .about-team__note {
  padding-left: 1rem;
  border-left: 3px solid var(--cinnabar);
  color: var(--about-ink-dim) !important;
}

@media (min-width: 880px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
}

/* ---------- 做得更细 ---------- */
.page-about .about-craft {
  padding: clamp(2.5rem, 7vw, 4.5rem) 0;
  border-top: 1px solid var(--line-gold);
}

.page-about .about-craft__head {
  max-width: 44em;
  margin-bottom: clamp(1.75rem, 5vw, 2.75rem);
}

.page-about .about-craft__list {
  display: grid;
  gap: 0;
}

.page-about .about-craft__row {
  display: grid;
  gap: 0.6rem;
  padding: clamp(1.35rem, 3.5vw, 2rem) 0;
  border-bottom: 1px solid var(--line-stone);
}

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

.page-about .about-craft__tag {
  font-family: var(--font-mono);
  font-size: var(--fs-index);
  letter-spacing: 0.18em;
  color: var(--jade-light);
}

.page-about .about-craft__head-line {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 600;
  color: var(--paper-white);
}

.page-about .about-craft__row p {
  margin: 0;
  max-width: 46em;
  font-size: 0.98rem;
  line-height: 1.9;
  color: var(--about-ink);
}

@media (min-width: 860px) {
  .page-about .about-craft__row {
    grid-template-columns: 6.5rem minmax(0, 14rem) minmax(0, 1fr);
    align-items: baseline;
    gap: 0 1.75rem;
  }
}

/* ---------- 三条主张 ---------- */
.page-about .about-tenets {
  padding: clamp(2.5rem, 7vw, 4.5rem) 0 clamp(1.5rem, 4vw, 2.5rem);
  border-top: 1px solid var(--line-gold);
}

.page-about .about-tenets__head {
  max-width: 46em;
  margin-bottom: clamp(1.5rem, 4vw, 2.25rem);
}

.page-about .about-tenet {
  border-bottom: 1px solid var(--line-gold);
}

.page-about .about-tenet:first-of-type {
  border-top: 1px solid var(--line-gold);
}

.page-about .about-tenet > summary {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 1.35rem 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.6vw, 1.45rem);
  font-weight: 600;
  color: var(--paper-white);
  transition: color 0.18s ease;
}

.page-about .about-tenet > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-tenet > summary:hover,
.page-about .about-tenet > summary:focus-visible {
  color: var(--gold-bright);
}

.page-about .about-tenet__num {
  font-family: var(--font-mono);
  font-size: var(--fs-index);
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-tenet__line {
  flex: 1 1 auto;
}

.page-about .about-tenet__mark {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--gold);
  transition: transform 0.22s ease;
}

.page-about .about-tenet[open] .about-tenet__mark {
  transform: rotate(45deg);
}

.page-about .about-tenet__body {
  margin: 0 0 1.5rem;
  padding-left: 0;
  max-width: 46em;
  font-size: 0.98rem;
  line-height: 1.9;
  color: var(--about-ink);
}

@media (min-width: 780px) {
  .page-about .about-tenet__body {
    padding-left: 3.9rem;
  }
}

/* ---------- 收束 ---------- */
.page-about .about-next {
  position: relative;
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
  padding: clamp(2.5rem, 7vw, 4rem) 0 clamp(3rem, 8vw, 5rem);
}

.page-about .about-next__lead {
  max-width: 46em;
}

.page-about .about-next__lead a {
  color: var(--jade-light);
  text-decoration: none;
  border-bottom: 1px solid rgba(147, 192, 181, 0.45);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .about-next__lead a:hover,
.page-about .about-next__lead a:focus-visible {
  color: var(--gold-bright);
  border-bottom-color: var(--gold-bright);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.75rem;
}

.page-about .about-next__band {
  height: 5px;
  margin-top: clamp(2.5rem, 7vw, 4rem);
  background: linear-gradient(90deg, rgba(76, 140, 129, 0) 0%, var(--jade) 28%, var(--jade-light) 58%, rgba(201, 162, 74, 0.6) 82%, rgba(201, 162, 74, 0) 100%);
  transform: skewY(-0.6deg);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-col-card,
  .page-about .about-timeline__item::before,
  .page-about .about-timeline__year,
  .page-about .about-tenet__mark,
  .page-about .about-index__link {
    transition: none;
  }

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