.page-about {
  --about-rail-w: 128px;
  background: var(--wb-space);
  color: var(--wb-paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 3.6vw, 34px) 0 clamp(48px, 7vw, 88px);
  background:
    radial-gradient(1100px 520px at 88% -14%, rgba(31, 175, 106, 0.20), transparent 62%),
    radial-gradient(820px 420px at 2% 112%, rgba(255, 107, 44, 0.15), transparent 60%),
    var(--wb-space);
  border-bottom: 1px solid var(--wb-line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(143, 166, 196, 0.08) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(143, 166, 196, 0.05) 1px, transparent 1px);
  background-size: 96px 96px, 96px 96px;
  pointer-events: none;
}

.page-about .about-hero > .wb-shell {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .wb-crumbs {
  font-size: 13px;
  color: var(--wb-mist);
}

.page-about .about-hero .wb-crumbs a {
  color: var(--wb-mist);
  text-decoration: none;
}

.page-about .about-hero .wb-crumbs a:hover {
  color: var(--wb-paper);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  margin-top: clamp(24px, 4vw, 48px);
  align-items: end;
}

.page-about .about-hero__main .wb-h1 {
  max-width: 20ch;
  color: var(--wb-paper);
}

.page-about .about-hero__main .wb-lead {
  max-width: 60ch;
  color: var(--wb-paper);
}

.page-about .about-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-facts {
  margin: 0;
  border-top: 1px solid var(--wb-line);
}

.page-about .about-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--wb-line);
}

.page-about .about-facts__label {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--wb-mist);
}

.page-about .about-facts__value {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.page-about .about-facts__num {
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1;
  font-weight: 700;
  color: var(--wb-orange);
}

.page-about .about-facts__unit {
  font-size: 13px;
  color: var(--wb-mist);
}

/* ---------- 首屏章节索引 ---------- */
.page-about .about-index {
  display: flex;
  gap: 8px;
  margin-top: clamp(28px, 4vw, 46px);
  padding-top: 16px;
  border-top: 1px solid var(--wb-line);
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index a {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--wb-line);
  color: var(--wb-mist);
  text-decoration: none;
  font-size: 13px;
  white-space: nowrap;
  transition: color var(--wb-dur) var(--wb-ease),
              border-color var(--wb-dur) var(--wb-ease),
              background var(--wb-dur) var(--wb-ease);
}

.page-about .about-index a .wb-mono {
  font-size: 11px;
  color: var(--wb-orange);
}

.page-about .about-index a:hover {
  color: var(--wb-paper);
  border-color: var(--wb-orange);
  background: rgba(255, 107, 44, 0.10);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  border-bottom: 1px solid var(--wb-line);
}

.page-about .about-chapter--paper {
  background: var(--wb-paper);
  border-bottom-color: var(--wb-paper-deep);
}

.page-about .about-chapter--paper .wb-h2,
.page-about .about-chapter--paper .wb-h3 {
  color: var(--wb-ink);
}

.page-about .about-chapter--paper .wb-lead {
  color: var(--wb-ink);
}

.page-about .about-chapter--paper .wb-text {
  color: var(--wb-space);
}

.page-about .about-chapter--dark .wb-h2,
.page-about .about-chapter--ink .wb-h2 {
  color: var(--wb-paper);
}

.page-about .about-chapter__inner {
  display: grid;
  gap: clamp(18px, 2.6vw, 32px);
}

.page-about .about-chapter__rail {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-about .about-chapter__num {
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1;
  font-weight: 700;
  color: var(--wb-mist);
}

.page-about .about-chapter--paper .about-chapter__num {
  color: var(--wb-line);
}

.page-about .about-chapter__content .wb-h2 {
  margin-top: 0;
}

/* ---------- 01 品牌里程碑 ---------- */
.page-about .about-miles {
  list-style: none;
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: 0;
  border-top: 1px solid var(--wb-paper-deep);
}

.page-about .about-miles__item {
  display: grid;
  gap: 8px;
  padding: 18px 0;
  border-bottom: 1px solid var(--wb-paper-deep);
}

.page-about .about-miles__tag {
  display: inline-block;
  justify-self: start;
  padding: 3px 10px;
  font-size: 13px;
  font-weight: 700;
  color: var(--wb-ink);
  background: var(--wb-orange);
}

.page-about .about-miles__title {
  margin: 0 0 6px;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 800;
  color: var(--wb-ink);
}

.page-about .about-miles__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--wb-space);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: clamp(26px, 3.4vw, 42px) 0 0;
}

.page-about .about-figure img,
.page-about .about-steps__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--wb-line);
}

.page-about .about-chapter--paper .about-figure img {
  border-color: var(--wb-paper-deep);
}

/* ---------- 02 服务地图 ---------- */
.page-about .about-map {
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: clamp(12px, 2vw, 20px) 0;
  border-top: 1px solid var(--wb-line);
  border-bottom: 1px solid var(--wb-line);
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-map__svg {
  display: block;
  width: 100%;
  min-width: 520px;
  height: auto;
}

.page-about .about-map__wires path {
  fill: none;
  stroke: var(--wb-line);
  stroke-width: 1.5;
}

.page-about .about-map__hub rect {
  fill: var(--wb-orange);
}

.page-about .about-map__hub-t {
  fill: var(--wb-ink);
  font-family: var(--wb-font-display);
  font-size: 19px;
  font-weight: 800;
}

.page-about .about-map__hub-s {
  fill: rgba(6, 16, 31, 0.7);
  font-size: 12px;
}

.page-about .about-map__node rect {
  fill: rgba(143, 166, 196, 0.08);
  stroke: var(--wb-line);
  stroke-width: 1.5;
  transition: fill var(--wb-dur) var(--wb-ease), stroke var(--wb-dur) var(--wb-ease);
}

.page-about .about-map__node-t {
  fill: var(--wb-paper);
  font-family: var(--wb-font-display);
  font-size: 17px;
  font-weight: 700;
}

.page-about .about-map__node-s {
  fill: var(--wb-mist);
  font-size: 12px;
}

.page-about .about-map__node:hover rect {
  fill: rgba(31, 175, 106, 0.14);
  stroke: var(--wb-green);
}

.page-about .about-services {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--wb-line);
  border: 1px solid var(--wb-line);
}

.page-about .about-services__item {
  background: var(--wb-space);
  padding: 18px 20px;
  transition: background var(--wb-dur) var(--wb-ease);
}

.page-about .about-services__item:hover {
  background: rgba(31, 175, 106, 0.10);
}

.page-about .about-services__link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  font-size: 17px;
  font-weight: 800;
  color: var(--wb-paper);
  text-decoration: none;
}

.page-about .about-services__link .wb-mono {
  font-size: 12px;
  font-weight: 400;
  color: var(--wb-orange);
}

.page-about .about-services__text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--wb-mist);
}

/* ---------- 03 首次访问四步 ---------- */
.page-about .about-steps {
  display: grid;
  gap: clamp(24px, 3.4vw, 40px);
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-steps__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--wb-paper-deep);
}

.page-about .about-steps__item {
  padding: 20px 0;
  border-bottom: 1px solid var(--wb-paper-deep);
}

.page-about .about-steps__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-about .about-steps__num {
  font-size: 18px;
  font-weight: 700;
  color: var(--wb-line);
}

.page-about .about-steps__title {
  margin: 0;
  font-size: clamp(17px, 2.2vw, 21px);
  font-weight: 800;
  color: var(--wb-ink);
}

.page-about .about-steps__text {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--wb-space);
}

.page-about .about-steps__toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  padding: 6px 0;
  background: none;
  border: 0;
  border-bottom: 1px solid var(--wb-line);
  color: var(--wb-space);
  font-family: var(--wb-font-body);
  font-size: 13px;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: color var(--wb-dur) var(--wb-ease), border-color var(--wb-dur) var(--wb-ease);
}

.page-about .about-steps__toggle:hover,
.page-about .about-steps__toggle[aria-expanded="true"] {
  color: var(--wb-ink);
  border-color: var(--wb-orange);
}

.page-about .about-steps__toggle:focus-visible {
  outline: 2px solid var(--wb-orange);
  outline-offset: 3px;
}

.page-about .about-steps__mark {
  display: inline-grid;
  place-items: center;
  width: 18px;
  height: 18px;
  font-size: 15px;
  line-height: 1;
  color: var(--wb-orange);
  transition: transform var(--wb-dur) var(--wb-ease);
}

.page-about .about-steps__toggle[aria-expanded="true"] .about-steps__mark {
  transform: rotate(45deg);
}

.page-about .about-steps__panel {
  margin-top: 12px;
  padding: 14px 16px;
  border-left: 2px solid var(--wb-orange);
  background: var(--wb-paper-deep);
}

.page-about .about-steps__panel[hidden] {
  display: none;
}

.page-about .about-steps__panel p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--wb-space);
}

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

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

/* ---------- 04 团队 ---------- */
.page-about .about-team {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--wb-line);
  border: 1px solid var(--wb-line);
}

.page-about .about-team__item {
  background: var(--wb-space);
  padding: 20px;
  display: grid;
  gap: 6px;
}

.page-about .about-team__num {
  font-size: clamp(28px, 3.6vw, 40px);
  line-height: 1;
  font-weight: 700;
  color: var(--wb-green);
}

.page-about .about-team__role {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  color: var(--wb-paper);
}

.page-about .about-team__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--wb-mist);
}

/* ---------- 05 覆盖 ---------- */
.page-about .about-coverage {
  display: grid;
  gap: 1px;
  margin-top: clamp(22px, 3vw, 32px);
  background: var(--wb-paper-deep);
  border: 1px solid var(--wb-paper-deep);
}

.page-about .about-coverage__cell {
  background: var(--wb-paper);
  padding: 22px 20px;
  display: grid;
  gap: 6px;
}

.page-about .about-coverage__num {
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1;
  font-weight: 700;
  color: var(--wb-space);
}

.page-about .about-coverage__label {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--wb-line);
}

/* ---------- 06 从这里开始 ---------- */
.page-about .about-chapter--ink {
  background: var(--wb-ink);
}

.page-about .about-paths {
  display: grid;
  gap: 1px;
  margin-top: clamp(22px, 3vw, 32px);
  background: var(--wb-line);
  border: 1px solid var(--wb-line);
}

.page-about .about-paths__item {
  display: grid;
  gap: 6px;
  padding: 20px;
  background: var(--wb-space);
  text-decoration: none;
  transition: background var(--wb-dur) var(--wb-ease);
}

.page-about .about-paths__item:hover {
  background: rgba(255, 107, 44, 0.12);
}

.page-about .about-paths__kicker {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--wb-orange);
}

.page-about .about-paths__title {
  font-size: 18px;
  font-weight: 800;
  color: var(--wb-paper);
}

.page-about .about-paths__desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--wb-mist);
}

.page-about .about-contact {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 28px;
  margin-top: clamp(24px, 3.4vw, 40px);
  padding-top: 20px;
  border-top: 1px solid var(--wb-line);
}

.page-about .about-contact__label {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--wb-mist);
}

.page-about .about-contact a {
  color: var(--wb-paper);
  text-decoration: none;
  border-bottom: 1px solid var(--wb-orange);
  font-family: var(--wb-font-mono);
  font-size: 15px;
  word-break: break-word;
}

.page-about .about-contact a:hover {
  color: var(--wb-orange);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-miles__item {
    grid-template-columns: 76px minmax(0, 1fr);
    align-items: start;
    gap: 18px;
  }

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

@media (min-width: 720px) {
  .page-about .about-services {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
  }

  .page-about .about-chapter__inner {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 64px);
  }

  .page-about .about-chapter__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    align-self: start;
    position: sticky;
    top: calc(var(--wb-header-h) + 28px);
  }

  .page-about .about-chapter__rail::after {
    content: "";
    display: block;
    width: 1px;
    height: 72px;
    background: linear-gradient(to bottom, var(--wb-line), transparent);
  }

  .page-about .about-chapter--paper .about-chapter__rail::after {
    background: linear-gradient(to bottom, var(--wb-paper-deep), transparent);
  }
}

@media (min-width: 960px) {
  .page-about .about-steps {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: start;
  }

  .page-about .about-steps__figure {
    position: sticky;
    top: calc(var(--wb-header-h) + 28px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index a,
  .page-about .about-services__item,
  .page-about .about-paths__item,
  .page-about .about-steps__toggle,
  .page-about .about-steps__mark,
  .page-about .about-map__node rect {
    transition: none;
  }

  .page-about .about-steps__toggle[aria-expanded="true"] .about-steps__mark {
    transform: none;
  }
}
<<<END>>>