.page-about {
  --about-line: rgba(33, 26, 21, 0.14);
  --about-line-strong: rgba(33, 26, 21, 0.32);
  --about-paper-soft: rgba(246, 241, 230, 0.72);
  background: var(--paper);
  color: var(--brown);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 20px 0 0;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--mute);
}

.page-about .breadcrumbs a {
  color: var(--mute);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

/* ---------- 首屏 ---------- */
.page-about .hero {
  padding: clamp(30px, 4.4vw, 58px) 0 clamp(38px, 6vw, 88px);
}

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

.page-about .hero__label {
  color: var(--cinnabar);
}

.page-about .hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(33px, 5.4vw, 62px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--brown);
}

.page-about .hero__lede {
  margin: 22px 0 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.9;
  color: var(--mute);
}

.page-about .hero__note {
  margin: 14px 0 0;
  padding-left: 12px;
  border-left: 3px solid var(--gilt);
  font-size: 14px;
  line-height: 1.7;
  color: var(--mute);
}

.page-about .hero__media {
  margin: 0;
  border: 1px solid var(--about-line-strong);
  background: var(--kraft);
}

.page-about .hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-about .hero__media .media__caption {
  padding: 11px 14px;
  border-top: 1px solid var(--about-line);
  font-size: 13px;
  line-height: 1.6;
  color: var(--mute);
}

.page-about .hero__kpis {
  list-style: none;
  margin: clamp(30px, 4vw, 54px) 0 0;
  padding: 24px 0 0;
  border-top: 1px solid var(--about-line-strong);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 18px;
}

.page-about .hero__kpis .kpi {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding-left: 12px;
  border-left: 3px solid var(--cinnabar);
  min-width: 0;
}

.page-about .hero__kpis .kpi__num {
  font-family: var(--font-num);
  font-size: clamp(30px, 3.8vw, 48px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--brown);
}

.page-about .hero__kpis .kpi__unit {
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--mute);
}

/* ---------- 区块骨架 ---------- */
.page-about .band {
  padding: clamp(48px, 7vw, 96px) 0;
  border-top: 1px solid var(--about-line);
}

.page-about .band--kraft {
  background: var(--kraft);
}

.page-about .band--ink {
  background: var(--ink);
  color: var(--paper);
  border-top-color: rgba(246, 241, 230, 0.18);
}

.page-about .sec-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(28px, 4vw, 52px);
  max-width: 76ch;
}

.page-about .sec-head__idx {
  margin: 0;
  font-family: var(--font-num);
  font-size: 14px;
  letter-spacing: 0.22em;
  color: var(--cinnabar);
}

.page-about .sec-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.1vw, 40px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--brown);
}

.page-about .sec-head__note {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--mute);
}

.page-about .band--ink .sec-head__idx {
  color: var(--gilt);
}

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

.page-about .band--ink .sec-head__note {
  color: var(--about-paper-soft);
}

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

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--about-line-strong);
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 clamp(26px, 3.6vw, 46px) 34px;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--cinnabar);
  box-shadow: 0 0 0 4px var(--paper), 0 0 0 5px var(--about-line-strong);
  z-index: 1;
}

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

.page-about .tl__card {
  border: 1px solid var(--about-line-strong);
  background: var(--paper);
  padding: clamp(18px, 2.4vw, 28px);
}

.page-about .tl__item:nth-child(even) .tl__card {
  background: var(--kraft);
}

.page-about .tl__span {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cinnabar);
}

.page-about .tl__card h3 {
  margin: 12px 0 10px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.4;
  color: var(--brown);
}

.page-about .tl__card > p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--mute);
}

/* ---------- 抽屉 ---------- */
.page-about .drawer {
  margin-top: 14px;
}

.page-about .drawer__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 0;
  background: none;
  border: 0;
  border-top: 1px solid var(--about-line);
  font-family: var(--font-sans);
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--brown);
  text-align: left;
  cursor: pointer;
  transition: color 180ms var(--ease);
}

.page-about .drawer__trigger:hover,
.page-about .drawer__trigger:focus-visible {
  color: var(--cinnabar);
}

.page-about .drawer__sign {
  position: relative;
  flex: none;
  width: 12px;
  height: 12px;
}

.page-about .drawer__sign::before,
.page-about .drawer__sign::after {
  content: "";
  position: absolute;
  background: currentColor;
}

.page-about .drawer__sign::before {
  left: 0;
  right: 0;
  top: 5.5px;
  height: 1px;
}

.page-about .drawer__sign::after {
  top: 0;
  bottom: 0;
  left: 5.5px;
  width: 1px;
  transition: transform 180ms var(--ease);
}

.page-about .drawer__trigger[aria-expanded="true"] .drawer__sign::after {
  transform: scaleY(0);
}

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

.page-about .drawer__panel[hidden] {
  display: none;
}

.page-about .gen-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
}

.page-about .gen-list > div {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 10px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--about-line);
}

.page-about .gen-list dt {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cinnabar);
}

.page-about .gen-list dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--mute);
}

/* ---------- 产能对照 ---------- */
.page-about .cap-figure {
  margin: 0 0 clamp(24px, 3vw, 40px);
  border: 1px solid var(--about-line-strong);
  background: var(--paper);
}

.page-about .cap-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .cap-figure .media__caption {
  padding: 11px 14px;
  border-top: 1px solid var(--about-line);
  font-size: 13px;
  line-height: 1.6;
  color: var(--mute);
}

.page-about .capt-wrap {
  border: 1px solid var(--about-line-strong);
  background: var(--paper);
}

.page-about .capt {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.page-about .capt__caption {
  padding: 14px 16px 0;
  text-align: left;
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--mute);
}

.page-about .capt thead th {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-align: left;
  padding: 14px 16px;
  border-right: 1px solid var(--hair-paper);
}

.page-about .capt thead th:last-child {
  border-right: 0;
}

.page-about .capt tbody th {
  padding: 16px;
  text-align: left;
  vertical-align: top;
  font-weight: 700;
  white-space: nowrap;
  color: var(--brown);
  border-bottom: 1px solid var(--about-line);
}

.page-about .capt tbody td {
  padding: 16px;
  vertical-align: top;
  line-height: 1.75;
  color: var(--mute);
  border-bottom: 1px solid var(--about-line);
}

.page-about .capt tbody tr:last-child th,
.page-about .capt tbody tr:last-child td {
  border-bottom: 0;
}

/* ---------- 厂区 ---------- */
.page-about .plants {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .plants__item {
  background: var(--paper);
  padding: clamp(20px, 2.6vw, 30px);
  border-top: 3px solid var(--about-line-strong);
  min-width: 0;
}

.page-about .plants__item--a {
  border-top-color: var(--cinnabar);
}

.page-about .plants__item--b {
  border-top-color: var(--gilt);
}

.page-about .plants__item--c {
  border-top-color: var(--ink);
}

.page-about .plants__idx {
  margin: 0 0 10px;
  color: var(--mute);
}

.page-about .plants__item h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 2.2vw, 26px);
  line-height: 1.3;
  color: var(--brown);
}

.page-about .plants__item p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mute);
}

.page-about .plants__spec {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--about-line);
  font-family: var(--font-num);
  font-size: 15px;
  letter-spacing: 0.03em;
  color: var(--brown);
}

/* ---------- 团队 ---------- */
.page-about .crew {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: rgba(246, 241, 230, 0.18);
}

.page-about .crew__item {
  background: var(--ink-2);
  padding: clamp(20px, 2.6vw, 28px);
  min-width: 0;
  transition: background 180ms var(--ease);
}

.page-about .crew__item:hover,
.page-about .crew__item:focus-within {
  background: #1B2E26;
}

.page-about .crew__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(44px, 5.4vw, 72px);
  line-height: 0.95;
  letter-spacing: 0.02em;
  color: var(--gilt);
}

.page-about .crew__role {
  display: block;
  margin-top: 10px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .crew__share {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: rgba(246, 241, 230, 0.6);
}

.page-about .crew__duty {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-paper-soft);
  transition: max-height 260ms var(--ease), opacity 260ms var(--ease), margin-top 260ms var(--ease);
}

.page-about .crew__item:hover .crew__duty,
.page-about .crew__item:focus-within .crew__duty {
  max-height: 120px;
  opacity: 1;
  margin-top: 12px;
}

/* ---------- 资质 ---------- */
.page-about .certs {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line-strong);
}

.page-about .certs__item {
  background: var(--paper);
  padding: clamp(18px, 2.4vw, 26px);
  min-width: 0;
}

.page-about .certs__tag {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--gilt);
}

.page-about .certs__item h3 {
  margin: 0 0 10px;
  font-size: 17px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--brown);
}

.page-about .certs__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mute);
}

.page-about .honours {
  margin-top: clamp(28px, 3.6vw, 44px);
  padding: clamp(20px, 2.6vw, 28px);
  border: 1px solid var(--about-line-strong);
  background: var(--kraft);
}

.page-about .honours__lead {
  margin: 0 0 16px;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--cinnabar);
}

.page-about .honours__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .honours__list li {
  padding-left: 18px;
  position: relative;
  font-size: 16px;
  line-height: 1.6;
  color: var(--brown);
}

.page-about .honours__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 1px;
  background: var(--gilt);
}

/* ---------- 供应链 ---------- */
.page-about .partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

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

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

.page-about .partners__list li {
  background: var(--kraft);
  padding: 18px 0;
  display: grid;
  gap: 6px;
}

.page-about .partners__list strong {
  font-size: 16px;
  color: var(--brown);
  padding-left: 14px;
  border-left: 3px solid var(--cinnabar);
  line-height: 1.4;
}

.page-about .partners__list span {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mute);
}

.page-about .partners__media {
  margin: 0;
  border: 1px solid var(--about-line-strong);
  background: var(--paper);
}

.page-about .partners__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .partners__media .media__caption {
  padding: 11px 14px;
  border-top: 1px solid var(--about-line);
  font-size: 13px;
  line-height: 1.6;
  color: var(--mute);
}

/* ---------- 收束 ---------- */
.page-about .closing__inner {
  display: grid;
  gap: 18px;
  max-width: 74ch;
}

.page-about .closing__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 3.4vw, 44px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .closing__text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--about-paper-soft);
}

.page-about .closing__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 22px;
  margin-top: 6px;
}

.page-about .closing__link {
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid var(--hair-paper-strong);
  padding-bottom: 2px;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .closing__link:hover,
.page-about .closing__link:focus-visible {
  color: var(--gilt);
  border-bottom-color: var(--gilt);
}

/* ---------- 入场动效 ---------- */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 320ms var(--ease), transform 320ms var(--ease);
}

.page-about [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .crew,
  .page-about .certs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

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

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

  .page-about .partners {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-about .partners__list li {
    padding: 20px 0;
  }

  /* 时间轴：纵向中轴，左右交替 */
  .page-about .tl::before {
    left: calc(50% - 0.5px);
  }

  .page-about .tl__item {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(40px, 5.5vw, 88px);
    padding-left: 0;
  }

  .page-about .tl__item > .tl__card {
    grid-row: 1;
  }

  .page-about .tl__item:nth-child(odd) > .tl__card {
    grid-column: 1;
  }

  .page-about .tl__item:nth-child(even) > .tl__card {
    grid-column: 2;
  }

  .page-about .tl__item::before {
    left: calc(50% - 5.5px);
    top: 16px;
  }
}

@media (min-width: 1180px) {
  .page-about .certs {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (max-width: 760px) {
  .page-about .capt,
  .page-about .capt tbody,
  .page-about .capt tr,
  .page-about .capt th,
  .page-about .capt td {
    display: block;
    width: 100%;
  }

  .page-about .capt thead {
    display: none;
  }

  .page-about .capt__caption {
    padding: 14px 14px 10px;
    border-bottom: 1px solid var(--about-line);
  }

  .page-about .capt tbody tr {
    padding: 4px 14px 12px;
    border-bottom: 1px solid var(--about-line-strong);
  }

  .page-about .capt tbody tr:last-child {
    border-bottom: 0;
  }

  .page-about .capt tbody th {
    padding: 14px 0 10px;
    white-space: normal;
    border-bottom: 1px solid var(--about-line);
    font-size: 17px;
    color: var(--cinnabar);
  }

  .page-about .capt tbody td {
    padding: 8px 0;
    border-bottom: 0;
  }

  .page-about .capt tbody td::before {
    content: attr(data-label);
    display: block;
    margin-bottom: 3px;
    font-size: 11.5px;
    letter-spacing: 0.14em;
    color: var(--mute);
  }
}

@media (hover: none) {
  .page-about .crew__duty {
    max-height: none;
    opacity: 1;
    margin-top: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .crew__duty,
  .page-about .drawer__sign::after,
  .page-about .drawer__trigger,
  .page-about .closing__link,
  .page-about .breadcrumbs a {
    transition: none;
  }
}