.page-about {
  --about-band: clamp(64px, 8.6vw, 116px);
  --about-gap: clamp(28px, 4vw, 52px);
  background: var(--paper);
  color: var(--ink);
}

/* 面包屑 */
.page-about .about-crumbs {
  padding-top: 26px;
  padding-bottom: 2px;
}
.page-about .about-crumbs .bj-crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--slate);
}
.page-about .about-crumbs .bj-crumbs__item + .bj-crumbs__item::before {
  content: "／";
  margin: 0 10px;
  color: var(--rule);
}
.page-about .about-crumbs .bj-crumbs__link {
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}
.page-about .about-crumbs .bj-crumbs__link:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* 首屏 */
.page-about .about-hero {
  padding: clamp(34px, 5.4vw, 70px) 0 clamp(44px, 6.6vw, 84px);
}
.page-about .about-hero__title {
  max-width: 17em;
  margin: 12px 0 0;
}
.page-about .about-hero__cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 3.8vw, 48px);
  margin-top: clamp(24px, 3.4vw, 42px);
  align-items: start;
}
.page-about .about-hero__lead {
  margin: 0;
  max-width: 36em;
}
.page-about .about-hero__facts {
  display: grid;
  gap: 0;
  padding: 4px 24px 6px;
  background: var(--paper-deep);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}
.page-about .about-hero__fact {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  font-size: 13px;
  color: var(--slate);
  border-top: 1px solid var(--rule);
}
.page-about .about-hero__fact:first-child {
  border-top: 0;
}
.page-about .about-hero__fact .bj-mono {
  flex: none;
  min-width: 5.4em;
  font-size: 16px;
  color: var(--ink);
  letter-spacing: 0.02em;
}

/* 引文 */
.page-about .about-pullquote {
  margin: clamp(40px, 6vw, 76px) 0 0;
  padding: 4px 0 4px 26px;
  border-left: 3px solid var(--gold-soft);
  max-width: 28em;
}
.page-about .about-pullquote p {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 2.6vw, 31px);
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--ink);
}

/* 锚点导航 */
.page-about .about-anchors {
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  background: var(--highlight);
}
.page-about .about-anchors__list {
  display: flex;
  gap: clamp(14px, 2.4vw, 34px);
  margin: 0;
  padding: 15px 0;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}
.page-about .about-anchors__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}
.page-about .about-anchors__link .bj-mono {
  font-size: 11px;
  color: var(--gold);
}
.page-about .about-anchors__link:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* 分区节奏 */
.page-about .about-band {
  padding: var(--about-band) 0;
}
.page-about .about-band--deep {
  position: relative;
  background: var(--paper-deep);
}
.page-about .about-band--deep::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 32px;
  background: var(--paper);
  clip-path: polygon(0 0, 100% 0, 100% 0, 0 100%);
  pointer-events: none;
}
.page-about .about-band--ink {
  position: relative;
  background: var(--ink);
  color: var(--paper);
}
.page-about .about-band--ink::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 32px;
  background: var(--paper-deep);
  clip-path: polygon(0 0, 100% 0, 100% 0, 0 100%);
  pointer-events: none;
}
.page-about .about-band--ink .bj-h2,
.page-about .about-h2--light {
  color: var(--highlight);
}
.page-about .about-band--ink .bj-text {
  color: rgba(243, 238, 228, 0.78);
}

/* 起点 */
.page-about .about-origin__grid {
  align-items: start;
}
.page-about .about-origin__main {
  max-width: 38em;
}
.page-about .about-origin__aside {
  padding-left: 22px;
  border-left: 1px solid var(--rule);
}
.page-about .about-origin__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--slate);
}
.page-about .about-origin__figure {
  margin: clamp(36px, 5vw, 58px) 0 0;
  position: relative;
  overflow: hidden;
  background: var(--paper-deep);
}
.page-about .about-origin__figure .bj-media__img {
  display: block;
  width: 100%;
  height: clamp(210px, 34vw, 420px);
  object-fit: cover;
}
.page-about .about-origin__figure .bj-media__caption {
  padding: 12px 2px 0;
  font-size: 13px;
  color: var(--slate);
}

/* 关键节点 */
.page-about .about-milestones__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 54px);
  align-items: start;
  margin-bottom: clamp(38px, 5.4vw, 70px);
}
.page-about .about-milestones__figure {
  margin: 0;
  overflow: hidden;
  background: var(--highlight);
}
.page-about .about-milestones__figure .bj-media__img {
  display: block;
  width: 100%;
  height: clamp(230px, 36vw, 420px);
  object-fit: cover;
}
.page-about .about-milestones__intro {
  max-width: 30em;
}

/* 时间轴 */
.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 26px;
  top: 18px;
  bottom: 18px;
  width: 1px;
  background: var(--rule);
}
.page-about .about-timeline__item {
  position: relative;
  padding-left: 84px;
  padding-bottom: 20px;
}
.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline__node {
  position: absolute;
  left: 0;
  top: 0;
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: var(--paper);
  font-size: 15px;
  letter-spacing: 0.04em;
  clip-path: polygon(0 0, calc(100% - 13px) 0, 100% 13px, 100% 100%, 0 100%);
}
.page-about .about-timeline__fold {
  border-bottom: 1px solid var(--rule);
}
.page-about .about-timeline__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 16px;
  width: 100%;
  padding: 14px 0 12px;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  color: inherit;
  font: inherit;
}
.page-about .about-timeline__label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.2vw, 25px);
  letter-spacing: -0.005em;
  color: var(--ink);
}
.page-about .about-timeline__scale {
  margin-left: auto;
  font-size: 12px;
  color: var(--gold);
  white-space: nowrap;
}
.page-about .about-timeline__head .bj-fold__sign {
  flex: none;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--slate);
  transition: color 180ms var(--ease);
}
.page-about .about-timeline__head:hover .bj-fold__sign,
.page-about .about-timeline__head:hover .about-timeline__label {
  color: var(--gold);
}
.page-about .about-timeline__body {
  padding: 0 0 22px;
}
.page-about .about-timeline__body p {
  margin: 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

/* 团队 */
.page-about .about-team__lead {
  max-width: 32em;
  margin: 12px 0 clamp(28px, 4vw, 46px);
}
.page-about .about-team__table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}
.page-about .about-team__table th,
.page-about .about-team__table td {
  text-align: left;
  vertical-align: top;
  padding: 18px 20px 18px 0;
  border-bottom: 1px solid var(--rule);
  line-height: 1.78;
  font-weight: 400;
}
.page-about .about-team__table thead th {
  padding-top: 0;
  padding-bottom: 12px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--slate);
  border-bottom: 1px solid var(--ink);
}
.page-about .about-team__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--ink);
  white-space: nowrap;
}
.page-about .about-team__meta {
  font-size: 12px;
  color: var(--gold);
  white-space: nowrap;
}

/* 维护标准 */
.page-about .about-standards__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4.4vw, 60px);
  align-items: start;
}
.page-about .about-standards__main {
  max-width: 42em;
}
.page-about .about-standards__list {
  margin: clamp(24px, 3.2vw, 38px) 0 0;
}
.page-about .about-standards__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 18px 0;
  border-top: 1px solid var(--rule);
}
.page-about .about-standards__item dt {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--ink);
}
.page-about .about-standards__item dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}
.page-about .about-standards__figure {
  margin: 0;
  overflow: hidden;
  background: var(--highlight);
}
.page-about .about-standards__figure .bj-media__img {
  display: block;
  width: 100%;
  height: clamp(200px, 30vw, 330px);
  object-fit: cover;
}
.page-about .about-standards__figure .bj-media__caption {
  padding: 12px 2px 0;
  font-size: 13px;
  color: var(--slate);
}

/* 流程 */
.page-about .about-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: clamp(40px, 5.6vw, 70px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--rule);
}
.page-about .about-flow__step {
  position: relative;
  padding: 24px 0;
  border-bottom: 1px solid var(--rule);
}
.page-about .about-flow__idx {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  color: var(--gold);
  letter-spacing: 0.04em;
}
.page-about .about-flow__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--ink);
}
.page-about .about-flow__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--slate);
}

/* 服务理念 */
.page-about .about-philosophy__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 56px);
  margin-top: clamp(26px, 3.8vw, 48px);
}
.page-about .about-philosophy__lead {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.3vw, 27px);
  line-height: 1.55;
  color: var(--gold-soft);
  max-width: 18em;
}
.page-about .about-philosophy__items {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
}
.page-about .about-philosophy__item {
  padding-top: 18px;
  border-top: 1px solid rgba(233, 211, 164, 0.34);
}
.page-about .about-philosophy__item h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  color: var(--highlight);
}
.page-about .about-philosophy__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: rgba(243, 238, 228, 0.78);
}

/* 合规 */
.page-about .about-compliance {
  padding-bottom: clamp(48px, 6vw, 78px);
}
.page-about .about-compliance__inner {
  max-width: 46em;
}
.page-about .about-compliance__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: clamp(22px, 3vw, 34px) 0 0;
}

/* 接着看 */
.page-about .about-next {
  border-top: 1px solid var(--rule);
  padding-top: clamp(38px, 5vw, 60px);
  padding-bottom: clamp(56px, 7vw, 92px);
}
.page-about .about-next__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: clamp(18px, 2.6vw, 30px) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-next__link {
  display: block;
  padding: 18px 0;
  border-top: 1px solid var(--rule);
  text-decoration: none;
  color: inherit;
}
.page-about .about-next__name {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  color: var(--ink);
  transition: color 180ms var(--ease);
}
.page-about .about-next__link:hover .about-next__name {
  color: var(--gold);
}
.page-about .about-next__desc {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--slate);
}

/* 平板与桌面 */
@media (min-width: 640px) {
  .page-about .about-standards__item {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 26px;
    align-items: baseline;
  }
  .page-about .about-philosophy__items {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-bottom: 1px solid var(--rule);
  }
  .page-about .about-flow__step {
    padding: 26px 28px 30px;
    border-bottom: 0;
    border-top: 0;
  }
  .page-about .about-flow__step:nth-child(odd) {
    padding-left: 0;
  }
  .page-about .about-flow__step + .about-flow__step::before {
    content: "";
    position: absolute;
    left: 0;
    top: 22px;
    bottom: 22px;
    width: 1px;
    background: var(--rule);
    transform: skewX(-15deg);
  }
  .page-about .about-flow__step:nth-child(3)::before {
    display: none;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__cols {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }
  .page-about .about-milestones__head {
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  }
  .page-about .about-standards__layout {
    grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  }
  .page-about .about-philosophy__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
    gap: clamp(32px, 5vw, 72px);
  }
  .page-about .about-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 clamp(30px, 4vw, 60px);
  }
  .page-about .about-team__table {
    table-layout: fixed;
  }
  .page-about .about-team__table thead th:nth-child(1) {
    width: 18%;
  }
  .page-about .about-team__table thead th:nth-child(2) {
    width: 56%;
  }
  .page-about .about-team__table thead th:nth-child(3) {
    width: 26%;
  }
}

@media (min-width: 1080px) {
  .page-about .about-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-flow__step:nth-child(odd) {
    padding-left: 28px;
  }
  .page-about .about-flow__step:first-child {
    padding-left: 0;
  }
  .page-about .about-flow__step:nth-child(3)::before {
    display: block;
  }
}

/* 窄屏收敛 */
@media (max-width: 599px) {
  .page-about .about-timeline__item {
    padding-left: 64px;
  }
  .page-about .about-timeline__node {
    width: 44px;
    height: 44px;
    font-size: 13px;
  }
  .page-about .about-timeline::before {
    left: 21px;
  }
  .page-about .about-timeline__scale {
    margin-left: 0;
  }
  .page-about .about-team__table,
  .page-about .about-team__table tbody,
  .page-about .about-team__table tr,
  .page-about .about-team__table td,
  .page-about .about-team__table th {
    display: block;
    width: 100%;
  }
  .page-about .about-team__table thead {
    display: none;
  }
  .page-about .about-team__table tr {
    padding: 18px 0;
    border-bottom: 1px solid var(--rule);
  }
  .page-about .about-team__table td,
  .page-about .about-team__table th {
    padding: 0;
    border: 0;
  }
  .page-about .about-team__table .about-team__name {
    margin-bottom: 8px;
  }
  .page-about .about-team__table .about-team__meta {
    margin-top: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-crumbs .bj-crumbs__link,
  .page-about .about-anchors__link,
  .page-about .about-timeline__head .bj-fold__sign,
  .page-about .about-timeline__label,
  .page-about .about-next__name {
    transition: none;
  }
}