.page-about {
  background: var(--ink);
  color: var(--warm);
}

.page-about .section {
  padding: clamp(46px, 7vw, 86px) 0;
}

/* ---------- 首屏框景 ---------- */
.page-about .pa-hero {
  padding: clamp(18px, 4vw, 34px) 0 clamp(38px, 6vw, 68px);
  background: linear-gradient(180deg, var(--ink-2) 0%, var(--ink) 78%);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--silver);
  margin-bottom: clamp(14px, 3vw, 24px);
}

.page-about .crumbs a {
  color: var(--silver);
  text-decoration: none;
  transition: color var(--t) var(--ease);
}

.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  color: var(--gold-lt);
}

.page-about .pa-hero__frame {
  position: relative;
  border: 1px solid var(--line);
  padding: clamp(22px, 4.5vw, 52px);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(201, 162, 75, 0.16), transparent 62%),
    linear-gradient(180deg, var(--ink-2), var(--ink));
  overflow: hidden;
}

.page-about .pa-hero__frame::before,
.page-about .pa-hero__frame::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  border: 1px solid var(--gold);
}

.page-about .pa-hero__frame::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .pa-hero__frame::after {
  right: -1px;
  bottom: -1px;
  border-left: 0;
  border-top: 0;
}

.page-about .pa-hero__frame h1 {
  margin: 14px 0 0;
  font-family: var(--f-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.14;
  font-size: clamp(29px, 6.2vw, 58px);
  color: var(--warm);
}

.page-about .pa-hero__frame .lede {
  margin: clamp(16px, 3vw, 24px) 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 2.2vw, 17px);
  line-height: 1.9;
  color: var(--silver);
}

.page-about .pa-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .pa-stats li {
  background: var(--ink-2);
  padding: 16px 18px;
}

.page-about .pa-stats__n {
  display: block;
  font-family: var(--f-num);
  font-size: clamp(26px, 5vw, 38px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--gold);
}

.page-about .pa-stats__l {
  display: block;
  margin-top: 9px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--silver);
}

/* ---------- 通用图文块 ---------- */
.page-about .pa-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--char);
}

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

.page-about .pa-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.7;
  color: var(--silver);
}

/* ---------- 品牌起点 ---------- */
.page-about .pa-origin {
  background: var(--ink);
}

.page-about .pa-origin__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .pa-origin__text h2 {
  margin: 14px 0 0;
}

.page-about .pa-origin__text p {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.88;
  color: var(--warm);
}

.page-about .pa-points {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .pa-points li {
  position: relative;
  padding: 13px 0 13px 26px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--warm);
}

.page-about .pa-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 12px;
  height: 1px;
  background: var(--gold);
}

/* ---------- 目录体系 ---------- */
.page-about .pa-catalog {
  background: var(--iron);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background-image:
    repeating-linear-gradient(90deg, rgba(58, 63, 71, 0.18) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(58, 63, 71, 0.12) 0 1px, transparent 1px 96px);
}

.page-about .pa-cat {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .pa-cat__index-title {
  position: relative;
  margin: 0 0 14px;
  padding-left: 16px;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--gold);
}

.page-about .pa-cat__index-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 2px;
  width: 7px;
  height: 7px;
  background: var(--gold);
}

.page-about .pa-cat__index ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .pa-cat__index a {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 11px 12px;
  background: var(--char);
  color: var(--warm);
  font-size: 14px;
  text-decoration: none;
  transition: background var(--t) var(--ease), color var(--t) var(--ease);
}

.page-about .pa-cat__index a:hover,
.page-about .pa-cat__index a:focus-visible {
  background: var(--ink-2);
  color: var(--gold-lt);
}

.page-about .pa-cat__index li[data-visible] a {
  color: var(--gold-lt);
  background: var(--ink-2);
}

.page-about .pa-cat__n {
  font-family: var(--f-num);
  font-size: 18px;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-about .pa-cat__head h2 {
  margin: 14px 0 0;
}

.page-about .pa-cat__head p {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.88;
  color: var(--silver);
}

.page-about .pa-figure--wide {
  margin-top: clamp(22px, 3.5vw, 32px);
}

.page-about .pa-cat__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .pa-cat__item {
  position: relative;
  padding: 18px 18px 20px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  transition: border-color var(--t) var(--ease), background var(--t) var(--ease);
}

.page-about .pa-cat__item::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 2px;
  height: 0;
  background: var(--gold);
  transition: height var(--t) var(--ease);
}

.page-about .pa-cat__item:hover,
.page-about .pa-cat__item:focus-within {
  border-color: var(--gold-dim);
  background: var(--char);
}

.page-about .pa-cat__item:hover::after {
  height: 100%;
}

.page-about .pa-cat__num {
  display: block;
  font-family: var(--f-num);
  font-size: 38px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--gold);
}

.page-about .pa-cat__title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 10px;
}

.page-about .pa-cat__title {
  margin: 0;
  font-family: var(--f-display);
  font-size: 19px;
  font-weight: 900;
  letter-spacing: 0.01em;
  color: var(--warm);
}

.page-about .pa-cat__count {
  flex: none;
  padding: 2px 8px;
  border: 1px solid rgba(178, 58, 46, 0.55);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cinnabar);
}

.page-about .pa-cat__item p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--silver);
}

/* ---------- 团队 ---------- */
.page-about .pa-team {
  background: var(--ink);
}

.page-about .pa-team__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .pa-team__text h2 {
  margin: 14px 0 0;
}

.page-about .pa-team__text > p {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.88;
  color: var(--silver);
}

.page-about .pa-team__cards {
  margin-top: clamp(20px, 3vw, 30px);
  display: grid;
  gap: 18px;
}

.page-about .pa-team__card {
  padding-left: 16px;
  border-left: 2px solid var(--gold);
}

.page-about .pa-team__title {
  margin: 0;
  font-family: var(--f-display);
  font-size: 17px;
  font-weight: 900;
  letter-spacing: 0.01em;
  color: var(--warm);
}

.page-about .pa-team__card p {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--silver);
}

/* ---------- 里程碑 ---------- */
.page-about .pa-miles {
  background: var(--char);
  border-top: 1px solid var(--line-soft);
}

.page-about .pa-miles__head h2 {
  margin: 14px 0 0;
}

.page-about .pa-miles__head p {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.88;
  color: var(--silver);
}

.page-about .pa-line {
  position: relative;
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
}

.page-about .pa-line::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold-dim), var(--line) 70%, transparent);
}

.page-about .pa-line__item {
  position: relative;
  padding: 0 0 clamp(24px, 3.5vw, 34px) 36px;
}

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

.page-about .pa-line__dot {
  position: absolute;
  left: 1px;
  top: 5px;
  width: 15px;
  height: 15px;
  background: var(--char);
  border: 1px solid var(--gold);
}

.page-about .pa-line__dot::after {
  content: "";
  position: absolute;
  inset: 4px;
  background: var(--gold);
}

.page-about .pa-line__year {
  display: block;
  font-family: var(--f-num);
  font-size: 26px;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-about .pa-line__title {
  margin: 8px 0 0;
  font-family: var(--f-display);
  font-size: 18px;
  font-weight: 900;
  letter-spacing: 0.01em;
  color: var(--warm);
}

.page-about .pa-line__item p {
  margin: 8px 0 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--silver);
}

/* ---------- 服务节奏 ---------- */
.page-about .pa-serve {
  background:
    radial-gradient(90% 70% at 12% 0%, rgba(178, 58, 46, 0.16), transparent 60%),
    var(--ink);
  border-top: 1px solid var(--line-soft);
}

.page-about .pa-serve__head h2 {
  margin: 14px 0 0;
}

.page-about .pa-serve__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(24px, 4vw, 38px);
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .pa-serve__grid article {
  background: var(--iron);
  padding: 20px 18px 22px;
}

.page-about .pa-serve__grid h3 {
  margin: 0;
  font-family: var(--f-display);
  font-size: 17px;
  font-weight: 900;
  letter-spacing: 0.01em;
  color: var(--gold-lt);
}

.page-about .pa-serve__grid p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--silver);
}

.page-about .pa-serve__cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: clamp(24px, 4vw, 34px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--line);
}

.page-about .pa-serve__links {
  flex: 1 1 260px;
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  letter-spacing: 0.02em;
  color: var(--silver);
}

.page-about .pa-serve__links a {
  color: var(--gold-lt);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-dim);
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-about .pa-serve__links a:hover,
.page-about .pa-serve__links a:focus-visible {
  color: var(--warm);
  border-color: var(--warm);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .pa-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .pa-cat__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

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

@media (min-width: 900px) {
  .page-about .pa-origin__grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: start;
  }

  .page-about .pa-team__grid {
    grid-template-columns: 0.9fr 1.1fr;
    align-items: start;
  }

  .page-about .pa-team__cards {
    gap: 22px;
  }
}

@media (min-width: 980px) {
  .page-about .pa-cat {
    grid-template-columns: 218px minmax(0, 1fr);
    align-items: start;
  }

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

  .page-about .pa-cat__index ol {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 1100px) {
  .page-about .pa-cat__item:nth-child(even) {
    margin-top: 32px;
  }

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

  .page-about .pa-line__item {
    padding-left: 42px;
  }

  .page-about .pa-line::before {
    left: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .pa-cat__item,
  .page-about .pa-cat__item::after,
  .page-about .pa-cat__index a,
  .page-about .crumbs a,
  .page-about .pa-serve__links a {
    transition: none;
  }
}