.page-about {
  --ab-rail: rgba(30, 26, 23, .18);
  --ab-ink-soft: rgba(30, 26, 23, .78);
  --ab-ink-mute: rgba(30, 26, 23, .62);
  --ab-paper-soft: rgba(244, 237, 227, .76);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  overflow-x: clip;
}

/* ---------- 顶部上下文条 ---------- */
.page-about .about-topline {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 20px;
  padding-top: 22px;
  padding-bottom: 22px;
}

.page-about .about-topline__stamp {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--tea);
}

.page-about .coord-index {
  font-family: var(--font-mono);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--pit);
  color: var(--paper);
  padding: clamp(48px, 7vw, 96px) 0 clamp(36px, 5vw, 72px);
}

.page-about .about-hero__slab {
  position: absolute;
  top: -26%;
  right: -16%;
  width: min(720px, 84vw);
  aspect-ratio: 1 / 1;
  background: linear-gradient(148deg, var(--clay) 0%, rgba(166, 58, 34, .05) 68%);
  transform: rotate(15deg);
  pointer-events: none;
}

.page-about .about-hero__rule {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--rule-dark);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .eyebrow {
  color: var(--pale-gold);
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  max-width: 20ch;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(32px, 5.2vw, 68px);
  line-height: 1.14;
  letter-spacing: -.012em;
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin: 22px 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.85;
  color: var(--ab-paper-soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .about-hero__figures {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin-top: clamp(34px, 5vw, 60px);
  border-top: 1px solid var(--rule-dark);
}

.page-about .hero-figure {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 16px 4px 0;
  border-bottom: 1px solid var(--rule-dark);
}

.page-about .hero-figure:nth-child(odd) {
  padding-right: 16px;
  border-right: 1px solid var(--rule-dark);
}

.page-about .hero-figure:nth-child(even) {
  padding-left: 16px;
}

.page-about .hero-figure__num {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(30px, 5.6vw, 46px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-about .hero-figure__label {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(244, 237, 227, .66);
}

/* ---------- 竖向时间轴区块 ---------- */
.page-about .tl-block {
  padding: clamp(44px, 6vw, 78px) 0 0;
}

.page-about .tl-block__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .tl-block__marker {
  position: relative;
}

.page-about .tl-year {
  display: block;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(46px, 9vw, 84px);
  line-height: .92;
  letter-spacing: -.03em;
  color: var(--clay);
  font-variant-numeric: tabular-nums;
}

.page-about .tl-phase {
  display: block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--tea);
}

.page-about .tl-block__body h2 {
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(23px, 3.4vw, 36px);
  line-height: 1.3;
  letter-spacing: -.005em;
  color: var(--ink);
}

.page-about .tl-block__body p {
  margin: 0 0 14px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ab-ink-soft);
}

.page-about .tl-notes {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid var(--rule);
}

.page-about .tl-notes li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ab-ink-soft);
}

.page-about .tl-notes b {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .08em;
  color: var(--clay);
}

/* ---------- 配图 ---------- */
.page-about .about-photo {
  margin: 28px 0 0;
}

.page-about .about-photo img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  background: var(--sand);
}

.page-about .about-photo figcaption,
.page-about .about-band__fig figcaption,
.page-about .about-team__fig figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ab-ink-mute);
}

/* ---------- 数据卡 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 26px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 16px 20px;
  background: var(--sand);
}

.page-about .about-stat__num {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(26px, 4.6vw, 38px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--ab-ink-mute);
}

/* ---------- 产地影像带 ---------- */
.page-about .about-band {
  margin-top: clamp(48px, 6vw, 84px);
  background: var(--tea);
  color: var(--pale-gold);
  overflow: hidden;
}

.page-about .about-band__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: center;
  padding-top: clamp(38px, 5vw, 64px);
  padding-bottom: clamp(38px, 5vw, 64px);
}

.page-about .about-band .eyebrow {
  color: var(--pale-gold);
}

.page-about .about-band .eyebrow__num {
  color: var(--gold);
}

.page-about .about-band__title {
  margin: 14px 0 16px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(23px, 3.4vw, 36px);
  line-height: 1.3;
  color: var(--pale-gold);
}

.page-about .about-band__text p {
  margin: 0 0 14px;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(240, 217, 168, .8);
}

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

.page-about .about-band__fig img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  background: var(--pit);
}

.page-about .about-band__fig figcaption {
  color: rgba(240, 217, 168, .62);
}

/* ---------- 里程碑时间线 ---------- */
.page-about .about-miles {
  padding: clamp(54px, 7vw, 96px) 0 clamp(30px, 4vw, 52px);
}

.page-about .about-miles .section-title {
  margin: 14px 0 0;
  max-width: 26ch;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.3;
  color: var(--ink);
}

.page-about .about-miles .section-note {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ab-ink-mute);
}

.page-about .mile-list {
  margin-top: clamp(28px, 4vw, 46px);
  border-top: 2px solid var(--ink);
}

.page-about .mile {
  border-bottom: 1px solid var(--rule);
}

.page-about .mile summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 18px 4px 18px 0;
  cursor: pointer;
  list-style: none;
  transition: transform .28s var(--ease);
}

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

.page-about .mile summary:hover {
  transform: translateX(6px);
}

.page-about .mile__year {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--clay);
  font-variant-numeric: tabular-nums;
  transition: color .28s var(--ease);
}

.page-about .mile summary:hover .mile__year,
.page-about .mile[open] .mile__year {
  color: var(--gold);
}

.page-about .mile__title {
  font-family: var(--font-sans);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.6;
  color: var(--ink);
}

.page-about .mile__sign {
  position: relative;
  width: 16px;
  height: 16px;
  flex: none;
}

.page-about .mile__sign::before,
.page-about .mile__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--tea);
  transform: translate(-50%, -50%);
}

.page-about .mile__sign::before {
  width: 14px;
  height: 1.5px;
}

.page-about .mile__sign::after {
  width: 1.5px;
  height: 14px;
  transition: transform .28s var(--ease);
}

.page-about .mile[open] .mile__sign::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-about .mile__note {
  margin: 0;
  padding: 0 0 20px 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ab-ink-soft);
}

/* ---------- 团队与日常 ---------- */
.page-about .about-team {
  padding: clamp(46px, 6vw, 84px) 0;
  background: var(--sand);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .about-team__title {
  margin: 14px 0 16px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(23px, 3.4vw, 36px);
  line-height: 1.3;
  color: var(--ink);
}

.page-about .about-team__text p {
  margin: 0 0 14px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ab-ink-soft);
}

.page-about .about-team__text .tl-notes {
  border-top-color: rgba(30, 26, 23, .22);
}

.page-about .about-team__text .tl-notes li {
  border-bottom-color: rgba(30, 26, 23, .18);
}

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

.page-about .about-team__fig img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  background: var(--paper);
}

/* ---------- 行业现场 ---------- */
.page-about .about-industry {
  padding: clamp(50px, 6vw, 90px) 0;
}

.page-about .about-industry .section-title {
  margin: 14px 0 0;
  max-width: 30ch;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.3;
  color: var(--ink);
}

.page-about .about-industry__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin-top: clamp(28px, 4vw, 46px);
}

.page-about .about-industry__card {
  padding: 24px 22px 26px;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--clay);
  transition: transform .28s var(--ease), border-left-color .28s var(--ease);
}

.page-about .about-industry__card:hover {
  transform: translateX(6px);
  border-left-color: var(--gold);
}

.page-about .about-industry__card h3 {
  margin: 14px 0 10px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(17px, 1.8vw, 21px);
  line-height: 1.45;
  color: var(--ink);
}

.page-about .about-industry__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ab-ink-soft);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  position: relative;
  padding: clamp(48px, 6vw, 88px) 0 clamp(54px, 7vw, 100px);
  background: var(--paper);
  border-top: 1px solid var(--rule);
  overflow: hidden;
}

.page-about .about-next__bar {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, var(--clay) 0%, var(--clay-soft) 38%, var(--gold) 70%, var(--celadon) 100%);
}

.page-about .about-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 56px);
  align-items: start;
}

.page-about .about-next__intro h2 {
  margin: 0 0 14px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(23px, 3.2vw, 34px);
  line-height: 1.32;
  color: var(--ink);
}

.page-about .about-next__intro p {
  margin: 0;
  max-width: 46ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ab-ink-mute);
}

.page-about .about-next__links {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--rule-strong);
}

.page-about .about-next__link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 4px;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  transition: transform .28s var(--ease);
}

.page-about .about-next__link:hover {
  transform: translateX(6px);
}

.page-about .about-next__link-label {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(17px, 1.9vw, 21px);
  line-height: 1.4;
  color: var(--clay);
}

.page-about .about-next__link-hint {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ab-ink-mute);
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .hero-figure {
    padding: 24px 18px 4px 0;
    border-bottom: 0;
  }

  .page-about .hero-figure:nth-child(even) {
    padding-left: 0;
  }

  .page-about .hero-figure:not(:last-child) {
    border-right: 1px solid var(--rule-dark);
    padding-right: 18px;
  }

  .page-about .hero-figure:nth-child(even):not(:last-child) {
    padding-left: 18px;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-industry__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-next__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
  }
}

@media (min-width: 880px) {
  .page-about .tl-block__grid {
    grid-template-columns: minmax(160px, 226px) minmax(0, 1fr);
    gap: 0 clamp(36px, 5vw, 64px);
    align-items: stretch;
  }

  .page-about .tl-block__marker {
    padding-left: 16px;
  }

  .page-about .tl-block__marker::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: -1px;
    right: calc(-1 * clamp(18px, 2.5vw, 32px));
    width: 1px;
    background: var(--ab-rail);
  }

  .page-about .tl-block__marker::before {
    content: "";
    position: absolute;
    top: 16px;
    right: calc(-1 * clamp(18px, 2.5vw, 32px) - 4px);
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--clay);
  }

  .page-about .tl-year {
    margin-left: -0.055em;
  }

  .page-about .about-band__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: clamp(36px, 5vw, 72px);
  }

  .page-about .about-team__fig {
    margin-top: 8px;
  }
}

@media (min-width: 1100px) {
  .page-about .tl-block__marker {
    padding-left: 0;
  }

  .page-about .tl-year {
    margin-left: -22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .mile summary,
  .page-about .about-industry__card,
  .page-about .about-next__link {
    transition: none;
  }

  .page-about .mile summary:hover,
  .page-about .about-industry__card:hover,
  .page-about .about-next__link:hover {
    transform: none;
  }
}