.page-about {
  --about-rule: 1px solid var(--xc-line);
  background: var(--xc-paper);
  color: var(--xc-ink);
  font-family: var(--xc-font-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

.page-about a {
  text-decoration: none;
}

/* ---------- 首屏 ---------- */
.page-about .about-intro {
  padding-top: 34px;
  padding-bottom: 54px;
}

.page-about .xc-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 30px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--xc-steel);
}

.page-about .xc-breadcrumb a {
  color: var(--xc-steel);
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--xc-ease), border-color 0.2s var(--xc-ease);
}

.page-about .xc-breadcrumb a:hover,
.page-about .xc-breadcrumb a:focus-visible {
  color: var(--xc-apricot);
  border-bottom-color: var(--xc-apricot);
}

.page-about .xc-breadcrumb__sep {
  color: var(--xc-steel-light);
}

.page-about .about-intro .xc-kicker {
  display: block;
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--xc-apricot);
}

.page-about .about-intro h1 {
  margin: 0 0 22px;
  max-width: 16em;
  font-family: var(--xc-font-head);
  font-size: clamp(32px, 8.2vw, 62px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--xc-green-deep);
}

.page-about .about-intro .xc-lede {
  margin: 0;
  max-width: 44em;
  padding-left: 18px;
  border-left: 3px solid var(--xc-apricot);
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--xc-ink);
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 40px;
  background: var(--xc-line);
  border: var(--about-rule);
}

.page-about .about-figures .xc-stat {
  display: block;
  padding: 18px 16px 20px;
  background: var(--xc-paper);
}

.page-about .about-figures .xc-stat__num {
  display: block;
  font-family: var(--xc-font-num);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--xc-green-deep);
}

.page-about .about-figures .xc-stat__label {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--xc-steel);
}

/* ---------- 主体栅格 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding-bottom: 88px;
}

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

/* ---------- 目录 ---------- */
.page-about .about-toc {
  border-top: 2px solid var(--xc-ink);
  padding-top: 14px;
}

.page-about .about-toc__title {
  margin: 0 0 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--xc-steel);
}

.page-about .about-toc__list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-toc__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 5px 0;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--xc-green-deep);
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--xc-ease), border-color 0.2s var(--xc-ease);
}

.page-about .about-toc__list a:hover,
.page-about .about-toc__list a:focus-visible {
  color: var(--xc-apricot);
  border-bottom-color: var(--xc-apricot);
}

.page-about .about-toc__idx {
  font-family: var(--xc-font-num);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--xc-steel);
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding-bottom: 58px;
  scroll-margin-top: 96px;
}

.page-about .about-chapter + .about-chapter {
  border-top: var(--about-rule);
  padding-top: 52px;
}

.page-about .about-chapter--end {
  padding-bottom: 0;
}

.page-about .about-chapter .xc-section__head {
  margin-bottom: 22px;
}

.page-about .about-chapter .xc-section__num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--xc-font-num);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--xc-apricot);
}

.page-about .about-chapter .xc-kicker {
  display: block;
  margin: 0 0 10px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--xc-steel);
}

.page-about .about-chapter .xc-section__title {
  margin: 0;
  max-width: 22em;
  font-family: var(--xc-font-head);
  font-size: clamp(23px, 5.4vw, 36px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--xc-ink);
}

.page-about .about-chapter .xc-prose p {
  max-width: 42em;
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--xc-ink);
}

.page-about .about-chapter .xc-prose p:last-child {
  margin-bottom: 0;
}

/* ---------- 要点清单 ---------- */
.page-about .about-points {
  display: grid;
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  background: var(--xc-line);
  border: var(--about-rule);
}

.page-about .about-points li {
  display: grid;
  gap: 7px;
  padding: 17px 18px;
  background: var(--xc-paper);
}

.page-about .about-points strong {
  font-size: 15.5px;
  font-weight: 800;
  color: var(--xc-green-deep);
}

.page-about .about-points span {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--xc-steel);
}

/* ---------- 色带 ---------- */
.page-about .about-ribbon {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 18px;
  margin: 0 0 54px;
  padding: 16px 20px;
  background: var(--xc-green-deep);
  border-left: 4px solid var(--xc-gold);
  color: var(--xc-paper);
}

.page-about .about-ribbon .xc-ribbon__label {
  font-family: var(--xc-font-num);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--xc-gold);
}

.page-about .about-ribbon__line {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--xc-paper);
}

.page-about .about-ribbon--wine {
  background: var(--xc-wine);
  border-left-color: var(--xc-apricot-soft);
}

.page-about .about-ribbon--wine .xc-ribbon__label {
  color: var(--xc-apricot-soft);
}

.page-about .about-ribbon--indigo {
  background: var(--xc-indigo);
  border-left-color: var(--xc-gold);
}

/* ---------- 图片 ---------- */
.page-about .about-media {
  margin: 30px 0 0;
}

.page-about .about-media--offset {
  margin-top: 34px;
}

.page-about .about-media .xc-media__inner {
  overflow: hidden;
  border: var(--about-rule);
  background: var(--xc-steel-light);
}

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

.page-about .about-media .xc-media__caption {
  margin-top: 10px;
  max-width: 46em;
  font-size: 13px;
  line-height: 1.75;
  color: var(--xc-steel);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  margin-top: 6px;
}

.page-about .about-track {
  position: relative;
  margin: 0;
  padding: 6px 0 0 28px;
  list-style: none;
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 26px;
  width: 2px;
  background: linear-gradient(180deg, var(--xc-apricot) 0%, var(--xc-steel) 62%, var(--xc-steel-light) 100%);
}

.page-about .about-node {
  position: relative;
  padding-bottom: 40px;
}

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

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 8px;
  width: 12px;
  height: 12px;
  background: var(--xc-paper);
  border: 2px solid var(--xc-apricot);
  transform: rotate(45deg);
}

.page-about .about-node__year {
  display: block;
  margin-bottom: 6px;
  font-family: var(--xc-font-num);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--xc-green-deep);
}

.page-about .about-node__title {
  margin: 0 0 8px;
  font-family: var(--xc-font-head);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--xc-ink);
}

.page-about .about-node > p {
  margin: 0 0 12px;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--xc-steel);
}

.page-about .about-node .xc-disclosure {
  max-width: 40em;
  border-top: 1px solid var(--xc-steel-light);
  padding-top: 10px;
}

.page-about .about-node .xc-disclosure__btn {
  display: inline-block;
  padding: 0;
  border: 0;
  background: none;
  font-family: inherit;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--xc-apricot);
  cursor: pointer;
}

.page-about .about-node .xc-disclosure__btn::after {
  content: " ＋";
  font-weight: 400;
}

.page-about .about-node .xc-disclosure__btn[aria-expanded="true"]::after {
  content: " －";
}

.page-about .about-node .xc-disclosure__btn:focus-visible {
  outline: 2px solid var(--xc-gold);
  outline-offset: 3px;
}

.page-about .about-node .xc-disclosure__panel {
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--xc-steel);
}

.page-about .about-node .xc-disclosure__panel p {
  margin: 0;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 28px;
  background: var(--xc-line);
  border: var(--about-rule);
}

.page-about .about-team-card {
  padding: 22px 20px 24px;
  background: var(--xc-paper);
  border-top: 3px solid transparent;
  transition: background-color 0.25s var(--xc-ease), border-color 0.25s var(--xc-ease);
}

.page-about .about-team-card:hover,
.page-about .about-team-card:focus-within {
  background: #ffffff;
  border-top-color: var(--xc-apricot);
}

.page-about .about-team-card:focus-visible {
  outline: 2px solid var(--xc-gold);
  outline-offset: -3px;
}

.page-about .about-team-card__num {
  display: block;
  font-family: var(--xc-font-num);
  font-size: 38px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--xc-green-deep);
}

.page-about .about-team-card h3 {
  margin: 12px 0 8px;
  font-family: var(--xc-font-head);
  font-size: 17px;
  font-weight: 800;
  color: var(--xc-ink);
}

.page-about .about-team-card > p {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--xc-steel);
}

.page-about .about-team-card .about-team-card__duty {
  margin: 0;
  padding-top: 11px;
  border-top: 1px dashed var(--xc-steel-light);
  font-size: 13px;
  line-height: 1.7;
  font-weight: 600;
  color: var(--xc-green-mid);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 30px;
  background: var(--xc-line);
  border: var(--about-rule);
}

.page-about .about-eco__item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 18px;
  background: var(--xc-paper);
}

.page-about .about-eco__num {
  font-family: var(--xc-font-num);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--xc-gold);
  background: var(--xc-green-deep);
  padding: 6px 10px;
}

.page-about .about-eco__label {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--xc-ink);
}

.page-about .about-quote {
  margin-top: 28px;
  padding: 2px 0 2px 18px;
  border-left: 3px solid var(--xc-apricot);
}

.page-about .about-quote p {
  margin: 0;
  max-width: 34em;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.7;
  color: var(--xc-green-deep);
}

/* ---------- 服务标准 ---------- */
.page-about .about-promise {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--about-rule);
}

.page-about .about-promise li {
  display: grid;
  gap: 7px;
  padding: 17px 0;
  border-bottom: var(--about-rule);
}

.page-about .about-promise__key {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--xc-green-deep);
}

.page-about .about-promise__val {
  margin: 0;
  max-width: 42em;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--xc-ink);
}

/* ---------- 相关页面 ---------- */
.page-about .about-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 24px;
  background: var(--xc-line);
  border: var(--about-rule);
}

.page-about .about-next__item {
  display: block;
  padding: 18px 20px 20px;
  background: var(--xc-paper);
  transition: background-color 0.2s var(--xc-ease);
}

.page-about .about-next__item:hover,
.page-about .about-next__item:focus-visible {
  background: #ffffff;
}

.page-about .about-next__item:focus-visible {
  outline: 2px solid var(--xc-gold);
  outline-offset: -3px;
}

.page-about .about-next__label {
  display: block;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--xc-apricot);
}

.page-about .about-next__title {
  display: block;
  margin-top: 8px;
  font-family: var(--xc-font-head);
  font-size: 16px;
  font-weight: 800;
  line-height: 1.45;
  color: var(--xc-ink);
}

.page-about .about-next__desc {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--xc-steel);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-next {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-promise li {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 22px;
    align-items: baseline;
  }
}

@media (min-width: 760px) {
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-track {
    padding-left: 36px;
  }

  .page-about .about-track::before {
    left: 7px;
  }

  .page-about .about-node::before {
    left: -36px;
    width: 14px;
    height: 14px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-intro {
    padding-top: 46px;
    padding-bottom: 64px;
  }

  .page-about .about-body {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 60px;
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: 96px;
  }

  .page-about .about-toc__list {
    display: block;
  }

  .page-about .about-toc__list li + li {
    margin-top: 2px;
  }

  .page-about .about-toc__list a {
    display: flex;
    justify-content: flex-start;
    padding: 8px 0;
    border-bottom: 1px solid var(--xc-steel-light);
  }

  .page-about .about-chapter {
    padding-bottom: 72px;
  }

  .page-about .about-chapter + .about-chapter {
    padding-top: 64px;
  }
}