.page-about {
  --ab-axis-w: 260px;
  --ab-sticky-top: calc(var(--lq-header-h) + 28px);
  color: var(--lq-ink);
}

.page-about .lq-band {
  padding: 56px 0;
}

@media (min-width: 780px) {
  .page-about .lq-band {
    padding: 84px 0;
  }
}

.page-about .lq-band--void,
.page-about .lq-band--graphite {
  color: var(--lq-paper);
}

.page-about .lq-band--void .ab-lede,
.page-about .lq-band--graphite .ab-lede {
  color: rgba(245, 246, 248, .76);
}

/* ---------- 通用排版零件 ---------- */

.page-about .ab-eyebrow {
  margin: 0 0 12px;
  font-family: var(--lq-font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--lq-blue);
}

.page-about .lq-band--void .ab-eyebrow,
.page-about .lq-band--graphite .ab-eyebrow {
  color: var(--lq-orange);
}

.page-about .ab-h2 {
  margin: 0 0 16px;
  font-family: var(--lq-font-serif);
  font-weight: 700;
  font-size: clamp(24px, 4.2vw, 44px);
  line-height: 1.14;
  letter-spacing: -.02em;
}

.page-about .ab-lede {
  margin: 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.78;
  color: #3d444f;
}

@media (min-width: 780px) {
  .page-about .ab-lede {
    font-size: 17px;
  }
}

.page-about .ab-sec-head {
  margin-bottom: 32px;
}

/* ---------- 首屏框景 ---------- */

.page-about .ab-crumbs {
  margin-bottom: 24px;
}

.page-about .ab-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--lq-font-mono);
  font-size: 12px;
  letter-spacing: .06em;
}

.page-about .ab-crumbs li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(245, 246, 248, .58);
}

.page-about .ab-crumbs li + li::before {
  content: "/";
  color: rgba(245, 246, 248, .3);
}

.page-about .ab-crumbs a {
  color: rgba(245, 246, 248, .82);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--lq-t) var(--lq-ease), color var(--lq-t) var(--lq-ease);
}

.page-about .ab-crumbs a:hover,
.page-about .ab-crumbs a:focus-visible {
  color: #fff;
  border-bottom-color: var(--lq-orange);
}

.page-about .ab-crumbs [aria-current="page"] {
  color: var(--lq-orange);
}

.page-about .ab-hero__frame {
  position: relative;
  padding: 32px 20px 36px;
  border: 1px solid rgba(201, 206, 216, .22);
  background-image: repeating-linear-gradient(90deg, rgba(31, 75, 255, .14) 0 1px, transparent 1px 72px);
}

.page-about .ab-hero__frame::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: var(--lq-orange);
}

.page-about .ab-hero__frame::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 1px;
  height: 100%;
  background-image: repeating-linear-gradient(180deg, var(--lq-line) 0 1px, transparent 1px 14px);
  opacity: .45;
}

@media (min-width: 780px) {
  .page-about .ab-hero__frame {
    padding: 48px 48px 52px;
  }
}

.page-about .ab-hero__title {
  margin: 0 0 22px;
  font-family: var(--lq-font-serif);
  font-weight: 900;
  font-size: clamp(30px, 7.4vw, 76px);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: #fff;
}

.page-about .ab-hero__lede {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(245, 246, 248, .78);
}

@media (min-width: 780px) {
  .page-about .ab-hero__lede {
    font-size: 17px;
  }
}

.page-about .ab-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 24px;
  margin: 34px 0 0;
  padding: 26px 0 0;
  list-style: none;
  border-top: 1px solid rgba(201, 206, 216, .2);
}

@media (min-width: 1000px) {
  .page-about .ab-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .ab-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .ab-num {
  font-family: var(--lq-font-mono);
  font-feature-settings: "tnum" 1;
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: #fff;
}

.page-about .ab-fact {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(245, 246, 248, .62);
}

/* ---------- 时间轴 + 阶段 ---------- */

.page-about .ab-road__shell {
  display: block;
}

@media (min-width: 1120px) {
  .page-about .ab-road__shell {
    display: grid;
    grid-template-columns: var(--ab-axis-w) minmax(0, 1fr);
    gap: 64px;
  }
}

.page-about .ab-axis {
  display: none;
}

@media (min-width: 1120px) {
  .page-about .ab-axis {
    display: block;
    position: sticky;
    top: var(--ab-sticky-top);
    align-self: start;
  }
}

.page-about .ab-axis__cap {
  margin: 0 0 16px;
  font-family: var(--lq-font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: #6a7280;
}

.page-about .ab-axis__list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-left: 1px solid var(--lq-line);
}

.page-about .ab-axis__list li {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 0 11px 18px;
  font-size: 13px;
  letter-spacing: .06em;
  color: #6a7280;
  transition: color var(--lq-t) var(--lq-ease);
}

.page-about .ab-axis__list li::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 50%;
  width: 9px;
  height: 1px;
  background: var(--lq-line);
  transition: width var(--lq-t) var(--lq-ease), background-color var(--lq-t) var(--lq-ease);
}

.page-about .ab-axis__list li.is-on {
  color: var(--lq-ink);
}

.page-about .ab-axis__list li.is-on::before {
  width: 15px;
  height: 2px;
  background: var(--lq-orange);
}

.page-about .ab-axis__list li:hover {
  color: var(--lq-blue-ink);
}

.page-about .ab-axis__no {
  font-family: var(--lq-font-mono);
  font-feature-settings: "tnum" 1;
  font-size: 12px;
  color: var(--lq-blue);
}

.page-about .ab-axis__list li.is-on .ab-axis__no {
  color: var(--lq-orange);
}

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

@media (min-width: 780px) {
  .page-about .ab-stages {
    gap: 22px;
  }
}

.page-about .ab-stage {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 24px 20px 24px 22px;
  background: #fff;
  border: 1px solid var(--lq-line);
  border-left: 2px solid var(--lq-line);
  transition: border-color var(--lq-t) var(--lq-ease), background-color var(--lq-t) var(--lq-ease);
}

@media (min-width: 620px) {
  .page-about .ab-stage {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 22px;
    padding: 28px 28px 28px 26px;
  }
}

.page-about .ab-stage:hover,
.page-about .ab-stage:focus-visible,
.page-about .ab-stage:focus-within {
  border-left-color: var(--lq-orange);
  background-color: #fbfbfd;
  outline: none;
}

.page-about .ab-stage:focus-visible {
  box-shadow: 0 0 0 2px var(--lq-orange);
}

.page-about .ab-stage__no {
  font-family: var(--lq-font-mono);
  font-feature-settings: "tnum" 1;
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--lq-blue);
}

.page-about .ab-stage:nth-child(even) .ab-stage__no {
  color: var(--lq-orange);
}

.page-about .ab-stage__title {
  margin: 0 0 10px;
  font-family: var(--lq-font-serif);
  font-weight: 700;
  font-size: clamp(19px, 2.6vw, 24px);
  line-height: 1.36;
  letter-spacing: -.01em;
}

.page-about .ab-stage__body p {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: #454c58;
}

@media (min-width: 780px) {
  .page-about .ab-stage__body p {
    font-size: 16px;
  }
}

.page-about .ab-stage__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-stage__tags li {
  padding: 4px 10px;
  font-family: var(--lq-font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--lq-blue-ink);
  border: 1px solid var(--lq-line);
  opacity: .58;
  transition: opacity var(--lq-t) var(--lq-ease), border-color var(--lq-t) var(--lq-ease);
}

.page-about .ab-stage:hover .ab-stage__tags li,
.page-about .ab-stage:focus-within .ab-stage__tags li {
  opacity: 1;
  border-color: rgba(31, 75, 255, .4);
}

/* ---------- 左右分栏 ---------- */

.page-about .ab-split {
  display: grid;
  gap: 32px;
}

@media (min-width: 900px) {
  .page-about .ab-split {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 56px;
    align-items: start;
  }

  .page-about .ab-split--flip .ab-split__fig {
    order: -1;
  }
}

.page-about .ab-split__fig {
  margin: 0;
}

.page-about .ab-split__fig img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--lq-line);
  object-fit: cover;
}

.page-about .lq-band--void .ab-split__fig img,
.page-about .lq-band--graphite .ab-split__fig img {
  border-color: rgba(201, 206, 216, .22);
}

/* ---------- 团队堆叠条 ---------- */

.page-about .ab-stack {
  margin-top: 30px;
}

.page-about .ab-stack__bar {
  display: flex;
  height: 56px;
  border: 1px solid var(--lq-line);
  background: #fff;
  overflow: hidden;
}

.page-about .ab-stack__seg {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--ab-w);
  min-width: 0;
  font-family: var(--lq-font-mono);
  font-feature-settings: "tnum" 1;
  font-size: 13px;
  font-weight: 700;
}

.page-about .ab-stack__seg--a {
  background: var(--lq-blue);
  color: #fff;
}

.page-about .ab-stack__seg--b {
  background: var(--lq-orange);
  color: var(--lq-ink);
}

.page-about .ab-stack__seg--c {
  background: var(--lq-graphite);
  color: #fff;
}

.page-about .ab-stack__legend {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px 20px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 620px) {
  .page-about .ab-stack__legend {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .ab-stack__legend li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: #4a515d;
}

.page-about .ab-stack__legend b {
  margin-left: auto;
  font-family: var(--lq-font-mono);
  font-feature-settings: "tnum" 1;
  font-size: 14px;
  color: var(--lq-ink);
}

.page-about .ab-dot {
  width: 10px;
  height: 10px;
  flex: none;
}

.page-about .ab-dot--a { background: var(--lq-blue); }
.page-about .ab-dot--b { background: var(--lq-orange); }
.page-about .ab-dot--c { background: var(--lq-graphite); }

/* ---------- 资质 ---------- */

.page-about .ab-certs {
  display: grid;
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  background: rgba(201, 206, 216, .22);
  border: 1px solid rgba(201, 206, 216, .22);
}

.page-about .ab-certs li {
  padding: 20px 18px;
  background: var(--lq-void);
}

.page-about .ab-certs__code {
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--lq-font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--lq-orange);
}

.page-about .ab-certs h3 {
  margin: 0 0 8px;
  font-family: var(--lq-font-serif);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.4;
  color: #fff;
}

.page-about .ab-certs p {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(245, 246, 248, .72);
}

/* ---------- 合作网络清单 ---------- */

.page-about .ab-net-list {
  display: grid;
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  background: var(--lq-line);
  border: 1px solid var(--lq-line);
}

.page-about .ab-net-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 16px;
  padding: 13px 16px;
  background: #fff;
  transition: background-color var(--lq-t) var(--lq-ease);
}

.page-about .ab-net-list li:hover {
  background: #f6f9ff;
}

.page-about .ab-net-list__k {
  font-size: 14px;
  color: #4a515d;
}

.page-about .ab-net-list__v {
  font-family: var(--lq-font-mono);
  font-feature-settings: "tnum" 1;
  font-size: 14px;
  color: var(--lq-blue-ink);
}

/* ---------- 保修双轨对照 ---------- */

.page-about .ab-tracks {
  position: relative;
  margin-top: 32px;
}

.page-about .ab-tracks__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.page-about .ab-tracks__switch {
  display: inline-flex;
  margin-bottom: 26px;
  border: 1px solid var(--lq-line);
  background: #fff;
}

.page-about .ab-tracks__switch label {
  padding: 11px 20px;
  font-family: var(--lq-font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: #5b6371;
  cursor: pointer;
  border-right: 1px solid var(--lq-line);
  transition: background-color var(--lq-t) var(--lq-ease), color var(--lq-t) var(--lq-ease);
}

.page-about .ab-tracks__switch label:last-child {
  border-right: 0;
}

.page-about .ab-tracks__switch label:hover {
  color: var(--lq-ink);
  background: rgba(31, 75, 255, .06);
}

.page-about .page-about #ab-track-full:checked ~ .ab-tracks__switch label[for="ab-track-full"],
.page-about #ab-track-full:checked ~ .ab-tracks__switch label[for="ab-track-full"],
.page-about #ab-track-part:checked ~ .ab-tracks__switch label[for="ab-track-part"] {
  background: var(--lq-orange);
  color: var(--lq-ink);
}

.page-about #ab-track-full:focus-visible ~ .ab-tracks__switch,
.page-about #ab-track-part:focus-visible ~ .ab-tracks__switch {
  outline: 2px solid var(--lq-orange);
  outline-offset: 3px;
}

.page-about .ab-tracks__grid {
  display: grid;
  gap: 1px;
  background: var(--lq-line);
  border: 1px solid var(--lq-line);
}

@media (min-width: 780px) {
  .page-about .ab-tracks__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .ab-track {
  padding: 24px 20px;
  background: #fff;
  transition: opacity var(--lq-t) var(--lq-ease);
}

.page-about #ab-track-full:checked ~ .ab-tracks__grid .ab-track--part,
.page-about #ab-track-part:checked ~ .ab-tracks__grid .ab-track--full {
  opacity: .34;
}

.page-about .ab-track__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.page-about .ab-track__head h3 {
  margin: 0;
  font-family: var(--lq-font-serif);
  font-weight: 700;
  font-size: 20px;
}

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

.page-about .ab-track li {
  display: grid;
  gap: 6px;
}

.page-about .ab-bar {
  display: block;
  width: var(--ab-w);
  height: 10px;
  min-width: 24px;
}

.page-about .ab-track--full .ab-bar {
  background: linear-gradient(90deg, #087A5C 0%, #0FB98A 100%);
}

.page-about .ab-track--part .ab-bar {
  background: linear-gradient(90deg, #8A5A00 0%, #E8A200 100%);
}

.page-about .ab-track__lb {
  font-family: var(--lq-font-mono);
  font-feature-settings: "tnum" 1;
  font-size: 12px;
  letter-spacing: .04em;
  color: #5b6371;
}

.page-about .ab-tracks__hint {
  margin: 18px 0 0;
  max-width: 66ch;
  font-size: 13px;
  line-height: 1.75;
  color: #6a7280;
}

/* ---------- 下一步 ---------- */

.page-about .ab-next__list {
  display: grid;
  gap: 1px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  background: rgba(201, 206, 216, .2);
  border: 1px solid rgba(201, 206, 216, .2);
}

@media (min-width: 900px) {
  .page-about .ab-next__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .ab-next__list li {
  padding: 26px 20px;
  background: var(--lq-graphite);
}

.page-about .ab-next__no {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--lq-font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--lq-orange);
}

.page-about .ab-next__list h3 {
  margin: 0 0 10px;
  font-family: var(--lq-font-serif);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.38;
  color: #fff;
}

.page-about .ab-next__list p {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(245, 246, 248, .72);
}

.page-about .ab-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.page-about .lq-band--graphite .lq-btn--ghost {
  color: var(--lq-paper);
  border-color: rgba(201, 206, 216, .34);
}

.page-about .lq-band--graphite .lq-btn--ghost:hover {
  border-color: var(--lq-orange);
  color: #fff;
}

.page-about .ab-next__note {
  margin: 22px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: rgba(245, 246, 248, .58);
}

.page-about .ab-next__note a {
  color: var(--lq-orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 106, 26, .5);
  transition: border-color var(--lq-t) var(--lq-ease);
}

.page-about .ab-next__note a:hover,
.page-about .ab-next__note a:focus-visible {
  border-bottom-color: var(--lq-orange);
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
  }
}
<<<END>>>

.page-about {
  --ab-w: 1rem;
}