.page-about {
  --about-rail-w: 288px;
  padding-bottom: 48px;
}

.page-about .breadcrumb {
  padding: 20px 0 4px;
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .breadcrumb__list li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(157, 179, 172, 0.5);
}

.page-about .breadcrumb__list a {
  color: var(--muted);
  text-decoration: none;
}

.page-about .breadcrumb__list a:hover,
.page-about .breadcrumb__list a:focus-visible {
  color: var(--cyan);
}

.page-about .breadcrumb__list [aria-current="page"] {
  color: var(--ink);
}

/* ---------- 首屏分屏 ---------- */
.page-about .about-hero {
  padding-top: 24px;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .about-hero__lede h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 7.2vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: 17px;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-hero__body {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__panel {
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: linear-gradient(160deg, var(--split), var(--rail) 72%);
  box-shadow: var(--shadow);
}

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

.page-about .about-ring {
  position: relative;
  flex: 0 0 auto;
  width: 128px;
  height: 128px;
}

.page-about .about-ring svg {
  display: block;
  width: 128px;
  height: 128px;
}

.page-about .about-ring__center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
}

.page-about .about-ring__num {
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
}

.page-about .about-ring__unit {
  margin-top: 4px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .about-legend {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  color: var(--muted);
}

.page-about .about-legend li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-about .about-legend strong {
  margin-left: 2px;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--ink);
}

.page-about .about-legend__dot {
  display: inline-block;
  width: 9px;
  height: 9px;
  transform: rotate(45deg);
}

.page-about .about-legend__dot--cyan {
  background: var(--cyan);
}

.page-about .about-legend__dot--amber {
  background: var(--amber);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 22px 0 0;
  border: 1px solid var(--line-soft);
  background: var(--line-soft);
}

.page-about .about-facts > div {
  padding: 14px 12px;
  background: rgba(4, 20, 15, 0.62);
}

.page-about .about-facts dt {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .about-facts dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--cyan);
}

/* ---------- 主体 + 侧栏 ---------- */
.page-about .about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  margin-top: 8px;
}

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

.page-about .about-rail {
  order: -1;
  position: static;
  padding: 16px 16px 18px;
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--cyan);
  background: rgba(11, 43, 34, 0.55);
}

.page-about .chapter-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  margin: 12px 0 0;
}

.page-about .chapter-nav a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 4px 0;
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
}

.page-about .chapter-nav a span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
}

.page-about .chapter-nav a:hover,
.page-about .chapter-nav a:focus-visible {
  color: var(--ink);
}

.page-about .side-note {
  display: block;
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: rgba(157, 179, 172, 0.72);
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  padding-top: 34px;
}

.page-about .about-sec h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.6vw, 2.2rem);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-sec__lead {
  margin: 14px 0 0;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  position: relative;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(35, 240, 208, 0.25) 48%, var(--pulse) 100%);
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 32px 34px;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 11px;
  height: 11px;
  background: var(--court);
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
}

.page-about .timeline__item:last-child::before {
  border-color: var(--pulse);
  box-shadow: 0 0 0 4px rgba(255, 90, 43, 0.12);
}

.page-about .timeline__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .timeline__title {
  margin: 8px 0 0;
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .timeline__desc {
  margin: 8px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 图形与配图 ---------- */
.page-about .about-figure {
  margin: 30px 0 0;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--rail);
  overflow: hidden;
}

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

.page-about .about-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line-soft);
  background: rgba(11, 43, 34, 0.5);
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .about-figure--band {
  margin-top: 36px;
}

.page-about .about-slant {
  height: 3px;
  margin: 36px 0 0;
  background: linear-gradient(90deg, var(--cyan), var(--pulse));
  transform: skewY(-4deg);
  transform-origin: left center;
  opacity: 0.85;
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 24px;
  margin-top: 26px;
}

.page-about .team-copy p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .team-copy p:last-child {
  margin-bottom: 0;
}

.page-about .bars {
  display: grid;
  gap: 16px;
  padding: 18px 16px;
  border: 1px solid var(--line);
  background: rgba(18, 59, 51, 0.45);
}

.page-about .bar__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  font-size: 13px;
  color: var(--muted);
}

.page-about .bar__val {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink);
}

.page-about .bar__track {
  margin-top: 8px;
  height: 8px;
  border-radius: 2px;
  background: rgba(157, 179, 172, 0.16);
  overflow: hidden;
}

.page-about .bar__fill {
  display: block;
  height: 100%;
}

.page-about .bar__fill--wide {
  width: 70%;
  background: linear-gradient(90deg, var(--cyan), rgba(35, 240, 208, 0.4));
}

.page-about .bar__fill--narrow {
  width: 30%;
  background: linear-gradient(90deg, var(--amber), rgba(255, 154, 60, 0.4));
}

.page-about .bars__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(157, 179, 172, 0.85);
}

.page-about .card--breath {
  margin-top: 28px;
}

/* ---------- 数据来源 ---------- */
.page-about .source-grid {
  display: grid;
  gap: 26px;
  margin-top: 26px;
}

.page-about .source-grid .about-figure {
  margin-top: 0;
}

.page-about .flow {
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .flow__step {
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
}

.page-about .flow__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--pulse);
}

.page-about .flow__step h3 {
  margin: 8px 0 0;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .flow__step p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 业务线 ---------- */
.page-about .lines {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.page-about .line-item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  background: linear-gradient(180deg, rgba(18, 59, 51, 0.6), rgba(4, 20, 15, 0.35));
}

.page-about .line-item--wine {
  border-left-color: var(--wine);
}

.page-about .line-item--indigo {
  border-left-color: var(--indigo);
}

.page-about .line-item__no {
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1;
  color: rgba(157, 179, 172, 0.55);
}

.page-about .line-item h3 {
  margin: 0;
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .line-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .line-item__link {
  align-self: flex-start;
  margin-top: auto;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(35, 240, 208, 0.35);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  text-decoration: none;
}

.page-about .line-item__link:hover,
.page-about .line-item__link:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

/* ---------- 本地服务 ---------- */
.page-about .local {
  display: grid;
  gap: 22px;
  margin-top: 26px;
}

.page-about .local__copy p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .local__card {
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--amber);
  background: rgba(11, 43, 34, 0.7);
}

.page-about .local__email {
  margin: 12px 0 10px;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--ink);
  word-break: break-all;
}

.page-about .local__card p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .local__note {
  font-size: 13px;
  color: rgba(157, 179, 172, 0.75);
}

.page-about .about-topline {
  margin: 30px 0 0;
}

/* ---------- 桌面栅格 ---------- */
@media (min-width: 780px) {
  .page-about .lines {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .team-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .source-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .local {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 34px;
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-hero {
    padding-top: 34px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-grid {
    grid-template-columns: minmax(0, 1fr) var(--about-rail-w);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-rail {
    order: 0;
    position: sticky;
    top: 108px;
  }

  .page-about .chapter-nav {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }

  .page-about .chapter-nav a {
    padding: 7px 0;
    border-bottom: 1px solid var(--line-soft);
  }

  .page-about .chapter-nav a:last-child {
    border-bottom: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-slant {
    transform: none;
  }
}