.page-about {
  --about-ink: #0B1120;
  --about-body: #2A3550;
  --about-sub: #4A5670;
  --about-line: rgba(11, 17, 32, .14);
  --about-orange-ink: #B44300;
  --about-card: rgba(255, 255, 255, .62);
  background: var(--paper);
  color: var(--about-ink);
  overflow-x: clip;
}

/* ---------- 开篇 ---------- */
.page-about .about-open {
  position: relative;
  padding: clamp(20px, 4vw, 40px) 0 clamp(30px, 5vw, 58px);
  overflow: hidden;
}

.page-about .about-open::before {
  content: "";
  position: absolute;
  top: -14%;
  right: -14%;
  width: min(54vw, 660px);
  height: 138%;
  background: linear-gradient(155deg, rgba(0, 87, 255, .17), rgba(0, 229, 255, .07) 58%, transparent 76%);
  transform: rotate(-9deg);
  pointer-events: none;
}

.page-about .about-open .dv-container {
  position: relative;
}

.page-about .about-breadcrumb {
  margin-bottom: 18px;
}

.page-about .about-breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
  color: var(--about-sub);
}

.page-about .about-breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(11, 17, 32, .32);
}

.page-about .about-breadcrumb a {
  color: var(--about-sub);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-about .about-breadcrumb a:hover {
  color: var(--blue);
  border-color: var(--blue);
}

.page-about .about-open__eyebrow {
  margin: 0;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--about-orange-ink);
}

.page-about .about-open__title {
  margin: 10px 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 6.2vw, 68px);
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--about-ink);
}

.page-about .about-open__mark {
  background: linear-gradient(transparent 64%, rgba(255, 106, 0, .42) 64%);
}

.page-about .about-open__lead {
  max-width: 62ch;
  margin: 0;
  font-size: clamp(16px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  border: 1px solid var(--about-line);
  border-radius: 12px;
  background: var(--about-card);
}

.page-about .about-fact__num {
  font-size: clamp(24px, 3.4vw, 32px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--blue);
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
}

.page-about .about-fact__label {
  font-size: 13px;
  line-height: 1.55;
  color: var(--about-sub);
}

.page-about .about-jump {
  margin-top: 26px;
}

.page-about .about-jump ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-jump a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 14px;
  border: 1px solid var(--about-line);
  border-radius: 999px;
  background: rgba(255, 255, 255, .55);
  font-size: 13px;
  color: var(--about-body);
  text-decoration: none;
  transition: color .25s var(--ease), border-color .25s var(--ease), background .25s var(--ease);
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  color: var(--blue);
  border-color: var(--blue);
  background: #fff;
}

/* ---------- 首图 ---------- */
.page-about .about-hero {
  margin: 0;
  line-height: 0;
}

.page-about .about-hero img {
  display: block;
  width: 100%;
  height: clamp(190px, 34vw, 420px);
  object-fit: cover;
}

/* ---------- 长文叙事 ---------- */
.page-about .about-story {
  padding: clamp(32px, 5vw, 66px) 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-story__inner {
  display: grid;
  gap: 18px;
}

.page-about .about-story__heading {
  margin: 0 0 8px;
  color: var(--about-ink);
}

.page-about .about-story__meta {
  margin: 0;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--about-orange-ink);
}

.page-about .about-story__body p {
  margin: 0 0 16px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-body);
}

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

.page-about .about-story__first {
  font-family: var(--font-serif);
  font-size: clamp(19px, 2.4vw, 23px);
  line-height: 1.72;
  color: var(--about-ink);
}

.page-about .about-story__kicker {
  padding-left: 16px;
  border-left: 3px solid var(--blue);
  font-size: 16px;
  color: var(--about-ink);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  padding-bottom: clamp(36px, 6vw, 74px);
  background: var(--ink);
  color: var(--white);
}

.page-about .about-timeline__band {
  padding-inline: clamp(18px, 4vw, 48px);
}

.page-about .about-timeline__intro {
  margin: 26px 0 24px;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-timeline__grid {
  position: relative;
  display: grid;
  gap: 4px;
}

.page-about .about-node {
  padding: 20px 0 22px;
  border-top: 1px solid var(--hair);
}

.page-about .about-node__summary {
  display: flex;
  flex-direction: column;
  gap: 6px;
  list-style: none;
  cursor: pointer;
}

.page-about .about-node__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-node__summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-about .about-node__year {
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--orange);
}

.page-about .about-node__title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--white);
  transition: color .25s var(--ease);
}

.page-about .about-node[open] .about-node__title {
  color: var(--cyan);
}

.page-about .about-node__body {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 内容流程 ---------- */
.page-about .about-process {
  padding: clamp(34px, 6vw, 74px) 0;
  background: var(--paper);
  border-top: 1px solid var(--about-line);
}

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

.page-about .about-process__lead {
  margin: 0 0 26px;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--about-body);
}

.page-about .about-process__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-steps {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-step {
  padding: 18px 20px 20px;
  border: 1px solid var(--about-line);
  border-radius: 14px;
  background: var(--about-card);
}

.page-about .about-step__num {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  background: var(--blue);
  font-size: 12px;
  color: #fff;
}

.page-about .about-step__title {
  margin: 10px 0 6px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--about-ink);
}

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

.page-about .about-process__media {
  margin: 0;
}

.page-about .about-process__media img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--about-line);
  border-radius: 16px;
}

.page-about .about-process__media figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-sub);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: 0 0 clamp(34px, 6vw, 74px);
  background: var(--paper);
}

.page-about .about-team__heading {
  margin: 0 0 24px;
  color: var(--about-ink);
}

.page-about .about-team__grid {
  display: grid;
  gap: 24px;
  align-items: center;
}

.page-about .about-donut {
  max-width: 320px;
  margin: 0 auto;
}

.page-about .about-donut svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-donut__num {
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  fill: #0B1120;
}

.page-about .about-donut__unit {
  font-family: var(--font-mono);
  font-size: 12px;
  fill: #4A5670;
  letter-spacing: .08em;
}

.page-about .about-legend {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-legend__item {
  display: grid;
  grid-template-columns: 14px 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--about-line);
  border-radius: 12px;
  background: var(--about-card);
  transition: background .25s var(--ease), border-color .25s var(--ease);
}

.page-about .about-legend__item:hover {
  background: #fff;
  border-color: var(--blue);
}

.page-about .about-legend__dot {
  width: 14px;
  height: 14px;
  border-radius: 4px;
}

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

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

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

.page-about .about-legend__text {
  font-size: 14px;
  line-height: 1.6;
  color: var(--about-body);
}

.page-about .about-legend__num {
  font-size: 18px;
  font-weight: 700;
  color: var(--about-ink);
}

.page-about .about-team__note {
  margin: 26px 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-body);
}

/* ---------- 服务范围 ---------- */
.page-about .about-reach {
  padding: clamp(34px, 6vw, 74px) 0;
  background: var(--ink-2);
  color: var(--white);
}

.page-about .about-reach__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-reach__media {
  margin: 0;
}

.page-about .about-reach__media img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--hair);
  border-radius: 16px;
}

.page-about .about-reach__heading {
  margin: 0 0 14px;
  color: var(--white);
}

.page-about .about-reach__text {
  margin: 0 0 18px;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-reach__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
}

.page-about .about-stat {
  padding: 14px 16px;
  border: 1px solid var(--hair);
  border-radius: 12px;
  background: rgba(0, 87, 255, .07);
}

.page-about .about-stat__num {
  display: block;
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -.01em;
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  padding: clamp(34px, 6vw, 74px) 0 clamp(42px, 7vw, 88px);
  background: var(--paper);
  border-top: 1px solid var(--about-line);
}

.page-about .about-next__heading {
  margin: 0 0 6px;
  color: var(--about-ink);
}

.page-about .about-next__grid {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

.page-about .about-next__card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px;
  border: 1px solid var(--about-line);
  border-radius: 16px;
  background: #fff;
  color: var(--about-ink);
  text-decoration: none;
  transition: transform .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible {
  transform: translateY(-4px);
  border-color: var(--blue);
  box-shadow: 0 24px 40px -30px rgba(5, 7, 15, .7);
}

.page-about .about-next__kicker {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--about-orange-ink);
}

.page-about .about-next__title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.35;
}

.page-about .about-next__text {
  font-size: 14px;
  line-height: 1.72;
  color: var(--about-sub);
}

.page-about .about-next__go {
  margin-top: auto;
  padding-top: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--blue);
}

.page-about .about-next__contact {
  margin: 30px 0 0;
  max-width: 72ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--about-sub);
}

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

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

@media (min-width: 860px) {
  .page-about .about-story__inner {
    grid-template-columns: 5fr 7fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-timeline__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    padding-top: 4px;
  }

  .page-about .about-timeline__grid::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--cyan) 0%, var(--blue) 42%, var(--orange) 100%);
    opacity: .9;
  }

  .page-about .about-node {
    border-top: 0;
    padding: 22px 20px 6px 0;
  }

  .page-about .about-team__grid {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 48px;
  }

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

  .page-about .about-next__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    align-items: start;
  }

  .page-about .about-next__card:nth-child(2) {
    margin-top: 28px;
  }
}

@media (min-width: 900px) {
  .page-about .about-process__grid {
    grid-template-columns: 7fr 5fr;
    gap: 46px;
    align-items: start;
  }

  .page-about .about-reach__grid {
    grid-template-columns: 5fr 7fr;
    gap: 48px;
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-next__card:hover,
  .page-about .about-next__card:focus-visible {
    transform: none;
  }
}