.page-about {
  --about-paper: #F4EFE6;
  --about-on-paper: #14151A;
  --about-on-paper-dim: rgba(20, 21, 26, .66);
  --about-on-paper-line: rgba(20, 21, 26, .13);
  --about-lit: rgba(214, 168, 75, .30);
  background: var(--ink);
  color: var(--text);
  overflow-x: clip;
}

/* ---------- 封面首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(2rem, 4.5vw, 3.25rem) clamp(2.6rem, 6vw, 5rem);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -18%;
  width: min(580px, 82vw);
  aspect-ratio: 1;
  background: radial-gradient(circle at 50% 50%, rgba(139, 92, 246, .30), rgba(61, 187, 255, .10) 44%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-gold) 30%, var(--line-gold) 70%, transparent);
}

.page-about .about-hero__title {
  margin: clamp(.9rem, 2vw, 1.4rem) 0 clamp(1rem, 2.4vw, 1.6rem);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.85rem, 5.6vw, 3.6rem);
  line-height: 1.16;
  letter-spacing: -.015em;
  color: var(--paper);
  max-width: 20em;
}

.page-about .about-hero__lede {
  max-width: 58ch;
  margin: 0;
  font-size: clamp(var(--fs-16), 1.5vw, var(--fs-18));
  line-height: 1.9;
  color: var(--text-dim);
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(1.9rem, 4vw, 2.9rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border-block: 1px solid var(--line-soft);
}

.page-about .about-stat {
  background: var(--ink);
  padding: 1rem 1.1rem;
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.45rem, 3.4vw, 2.05rem);
  line-height: 1.2;
  letter-spacing: .02em;
  color: var(--gold-soft);
}

.page-about .about-stat__label {
  display: block;
  margin-top: .3rem;
  font-size: var(--fs-12);
  letter-spacing: .1em;
  color: var(--text-mute);
}

/* ---------- 画册式双栏长文 ---------- */
.page-about .about-chapter {
  padding-block: clamp(2.4rem, 5.5vw, 4.4rem);
}

.page-about .chapter-grid {
  display: grid;
  gap: 1.25rem;
}

.page-about .chapter-aside {
  display: flex;
  flex-direction: column;
  gap: .45rem;
  padding-left: .95rem;
  border-left: 1px solid var(--line-gold);
}

.page-about .chapter-num {
  font-size: var(--fs-12);
  letter-spacing: .26em;
  color: var(--gold);
}

.page-about .chapter-year {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  line-height: 1;
  color: rgba(139, 92, 246, .52);
}

.page-about .chapter-quote {
  margin: .35rem 0 0;
  font-family: var(--font-serif);
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--text-mute);
  max-width: 22ch;
}

.page-about .chapter-title {
  margin: 0 0 1rem;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.35rem, 3.4vw, 2rem);
  line-height: 1.32;
  color: var(--paper);
}

.page-about .chapter-body p {
  margin: 0 0 1.05rem;
  max-width: 64ch;
  font-size: var(--fs-16);
  line-height: 1.9;
  color: var(--text-dim);
}

.page-about .chapter-lede {
  margin-bottom: 1.5rem;
}

.page-about .chapter-figure,
.page-about .eco-figure,
.page-about .team-figure {
  margin: 1.6rem 0;
}

.page-about .chapter-figure img,
.page-about .eco-figure img,
.page-about .team-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: linear-gradient(155deg, #161824, #0B0B0F 58%, #1c1228);
}

.page-about .figure-caption {
  margin-top: .6rem;
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--text-mute);
}

.page-about .inline-link {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 187, 255, .35);
  padding-bottom: 1px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .inline-link:hover,
.page-about .inline-link:focus-visible {
  color: var(--gold-soft);
  border-bottom-color: var(--gold-soft);
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  list-style: none;
  position: relative;
  margin: 1.5rem 0 0;
  padding: 0 0 0 1.5rem;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: .9rem;
  bottom: 1rem;
  width: 1px;
  background: linear-gradient(180deg, rgba(214, 168, 75, .62), rgba(214, 168, 75, .05));
}

.page-about .timeline-item {
  margin: 0 0 .85rem;
}

.page-about .tl__summary {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .2rem .95rem;
  padding: .15rem 0 .55rem;
  cursor: pointer;
  list-style: none;
}

.page-about .tl__summary::-webkit-details-marker {
  display: none;
}

.page-about .tl__summary::before {
  content: "";
  position: absolute;
  left: -1.5rem;
  top: .62rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--gold);
  transform: translateX(-50%);
  transition: background-color .2s var(--ease), border-color .2s var(--ease), box-shadow .2s var(--ease);
}

.page-about .tl[open] .tl__summary::before {
  background: var(--coral);
  border-color: var(--coral);
  box-shadow: 0 0 0 4px rgba(255, 107, 74, .14);
}

.page-about .tl__year {
  font-family: var(--font-mono);
  font-size: var(--fs-18);
  font-weight: 600;
  letter-spacing: .03em;
  color: var(--gold);
  transition: color .2s var(--ease);
}

.page-about .tl[open] .tl__year {
  color: var(--coral);
}

.page-about .tl__name {
  font-family: var(--font-display);
  font-size: var(--fs-16);
  font-weight: 700;
  color: var(--paper);
}

.page-about .tl__summary:hover .tl__name,
.page-about .tl__summary:focus-visible .tl__name {
  color: var(--gold-soft);
}

.page-about .tl__body {
  padding: .2rem 0 .95rem;
  margin-bottom: .6rem;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .tl__body p {
  margin: 0;
  max-width: 62ch;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--text-dim);
}

/* ---------- 团队 ---------- */
.page-about .team-mix {
  margin: 1.6rem 0 1.4rem;
  border-top: 1px solid var(--line-soft);
}

.page-about .team-bar {
  padding: .95rem 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .team-bar__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.page-about .team-bar__label {
  font-size: var(--fs-16);
  font-weight: 700;
  color: var(--text);
}

.page-about .team-bar__num {
  font-family: var(--font-mono);
  font-size: var(--fs-18);
  color: var(--gold-soft);
}

.page-about .team-bar__track {
  display: block;
  height: 4px;
  margin-top: .6rem;
  border-radius: 2px;
  background: rgba(244, 239, 230, .08);
  overflow: hidden;
}

.page-about .team-bar__fill {
  display: block;
  height: 100%;
  border-radius: 2px;
}

.page-about .team-bar:nth-child(1) .team-bar__fill {
  width: 43%;
  background: linear-gradient(90deg, var(--gold), var(--gold-soft));
}

.page-about .team-bar:nth-child(2) .team-bar__fill {
  width: 32%;
  background: linear-gradient(90deg, var(--violet), var(--blue));
}

.page-about .team-bar:nth-child(3) .team-bar__fill {
  width: 25%;
  background: linear-gradient(90deg, var(--coral), var(--gold));
}

.page-about .team-bar__role {
  margin: .55rem 0 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--text-mute);
}

.page-about .sub-title {
  margin: 2rem 0 1rem;
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 2.4vw, 1.35rem);
  font-weight: 700;
  color: var(--gold-soft);
}

.page-about .review-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border-block: 1px solid var(--line-soft);
}

.page-about .review-item {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  gap: .9rem;
  align-items: start;
  padding: 1rem .25rem;
  background: var(--ink);
}

.page-about .review-item__num {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .1em;
  color: var(--gold);
  padding-top: .28rem;
}

.page-about .review-item__text strong {
  display: block;
  font-size: var(--fs-16);
  color: var(--paper);
  margin-bottom: .3rem;
}

.page-about .review-item__text p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--text-dim);
  max-width: 58ch;
}

/* ---------- 矿物纸色面板 ---------- */
.page-about .about-band {
  background: var(--about-paper);
  color: var(--about-on-paper);
  padding-block: clamp(2.2rem, 5.5vw, 4rem);
  margin-block: clamp(1.6rem, 4vw, 3rem);
  background-image:
    linear-gradient(180deg, rgba(214, 168, 75, .10), transparent 22%),
    radial-gradient(circle at 88% 8%, rgba(139, 92, 246, .12), transparent 46%);
}

.page-about .band-head {
  max-width: 62ch;
  margin-bottom: clamp(1.4rem, 3vw, 2rem);
}

.page-about .band-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .24em;
  color: #96702a;
  margin-bottom: .6rem;
}

.page-about .band-title {
  margin: 0 0 .85rem;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.35rem, 3.4vw, 2rem);
  line-height: 1.32;
  color: var(--about-on-paper);
}

.page-about .band-lede {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--about-on-paper-dim);
}

.page-about .table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-top: 1px solid rgba(20, 21, 26, .26);
}

.page-about .pl-table {
  width: 100%;
  min-width: 540px;
  border-collapse: collapse;
  font-size: var(--fs-14);
}

.page-about .pl-table th {
  text-align: left;
  padding: .7rem .8rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-weight: 500;
  letter-spacing: .14em;
  color: rgba(20, 21, 26, .48);
  white-space: nowrap;
  border-bottom: 1px solid rgba(20, 21, 26, .22);
}

.page-about .pl-table td {
  padding: .95rem .8rem;
  vertical-align: top;
  line-height: 1.75;
  color: var(--about-on-paper-dim);
  border-bottom: 1px solid var(--about-on-paper-line);
}

.page-about .pl-table td:first-child {
  white-space: nowrap;
  font-weight: 700;
  color: var(--about-on-paper);
}

.page-about .pl-table tbody tr {
  transition: background-color .2s var(--ease);
}

.page-about .pl-table tbody tr:hover {
  background: rgba(214, 168, 75, .18);
}

.page-about .pl-table tbody tr:focus-within {
  background: rgba(139, 92, 246, .12);
}

.page-about .band-foot {
  margin: 1.25rem 0 0;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--about-on-paper-dim);
  max-width: 66ch;
}

.page-about .band-link {
  color: #8a5a12;
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid rgba(138, 90, 18, .45);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .band-link:hover,
.page-about .band-link:focus-visible {
  color: #4d2f04;
  border-bottom-color: #4d2f04;
}

/* ---------- 服务标准 ---------- */
.page-about .about-standards {
  padding-block: clamp(2.4rem, 5.5vw, 4.4rem);
  border-top: 1px solid var(--line-soft);
  background:
    radial-gradient(circle at 82% 0%, rgba(61, 187, 255, .10), transparent 46%),
    radial-gradient(circle at 6% 88%, rgba(255, 107, 74, .08), transparent 44%);
}

.page-about .standard-list {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-about .standard-item {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  gap: .9rem;
  align-items: start;
  padding: clamp(1rem, 2.4vw, 1.4rem);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(26, 27, 32, .92), rgba(11, 11, 15, .92));
  box-shadow: var(--shadow-soft);
  transition: border-color .22s var(--ease), transform .22s var(--ease);
}

.page-about .standard-item:hover {
  border-color: var(--line-gold);
  transform: translateY(-2px);
}

.page-about .standard-item__num {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .14em;
  color: var(--gold);
  padding-top: .3rem;
}

.page-about .standard-item__text h3 {
  margin: 0 0 .45rem;
  font-family: var(--font-display);
  font-size: var(--fs-16);
  font-weight: 700;
  color: var(--paper);
}

.page-about .standard-item__text p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.6rem;
}

.page-about .cta-note {
  margin: .9rem 0 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--text-mute);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .standard-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: .8rem;
  }

  .page-about .standard-item {
    grid-template-columns: minmax(0, 1fr);
    gap: .5rem;
  }
}

@media (min-width: 900px) {
  .page-about .chapter-grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 8fr);
    column-gap: clamp(2rem, 5vw, 4.5rem);
    align-items: start;
  }

  .page-about .chapter-aside {
    padding-top: .35rem;
  }

  .page-about .chapter-figure,
  .page-about .eco-figure {
    margin-block: 1.9rem;
  }

  .page-about .team-figure {
    max-width: 460px;
  }

  .page-about .about-hero__title {
    max-width: 17em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .standard-item,
  .page-about .pl-table tbody tr,
  .page-about .tl__summary::before {
    transition: none;
  }

  .page-about .standard-item:hover {
    transform: none;
  }
}