.page-about {
  --idx-w: 168px;
  --pl: clamp(20px, 3vw, 34px);
  background: var(--ink);
  color: var(--paper);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding-top: clamp(18px, 2.6vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(24px, 4.6vw, 58px) clamp(40px, 7vw, 92px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 96px 96px;
  opacity: .16;
  -webkit-mask-image: linear-gradient(180deg, #000, transparent 76%);
  mask-image: linear-gradient(180deg, #000, transparent 76%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
}

.page-about .about-hero__title {
  margin: .2em 0 0;
  font-size: clamp(36px, 6.6vw, 96px);
  font-weight: 300;
  line-height: .98;
  letter-spacing: -.022em;
  color: var(--paper);
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--cyan);
}

.page-about .about-hero__lede {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(242, 239, 233, .76);
}

.page-about .about-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3.4vw, 38px);
}

.page-about .about-hero__aside {
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.page-about .about-hero__aside-k {
  margin: 0;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--moss-t);
}

.page-about .about-hero__words {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-about .about-hero__words li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--paper);
}

.page-about .about-hero__words li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 9px;
  height: 1px;
  background: var(--cyan);
}

/* ---------- 区块骨架 ---------- */
.page-about .about-section {
  padding-block: clamp(52px, 8vw, 108px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-section--tint {
  background: var(--ink-2);
}

.page-about .about-section--moss {
  background:
    linear-gradient(150deg, rgba(79, 107, 88, .34), rgba(10, 12, 16, 0) 58%),
    var(--ink-2);
}

.page-about .about-section--last {
  border-bottom: 0;
}

/* ---------- 历程 ---------- */
.page-about .about-journey {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 40px);
}

.page-about .journey-track {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--slate);
  overflow: hidden;
}

.page-about .journey-track img {
  display: block;
  width: 100%;
  height: clamp(160px, 26vw, 300px);
  object-fit: cover;
  opacity: .85;
}

.page-about .journey-index {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .journey-index::-webkit-scrollbar {
  display: none;
}

.page-about .journey-index__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  color: var(--moss-t);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .journey-index__link span {
  color: var(--cyan);
}

.page-about .journey-index__link:hover,
.page-about .journey-index__link:focus-visible {
  color: var(--paper);
  border-color: rgba(69, 240, 211, .5);
}

.page-about .journey-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--pl);
  border-left: 1px solid var(--line);
  display: grid;
  gap: clamp(30px, 4.6vw, 58px);
}

.page-about .journey-item {
  position: relative;
}

.page-about .journey-item::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--pl) - 4px);
  top: .5em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--cyan);
  box-shadow: 0 0 0 5px rgba(69, 240, 211, .09);
}

.page-about .journey-item__no {
  display: block;
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-about .journey-item__title {
  margin: 0 0 10px;
  font-size: clamp(19px, 2.5vw, 27px);
  font-weight: 500;
  line-height: 1.32;
  color: var(--paper);
}

.page-about .journey-item__text {
  margin: 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(242, 239, 233, .72);
}

/* ---------- 认证 ---------- */
.page-about .auth-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  margin-top: clamp(24px, 3.6vw, 44px);
}

.page-about .auth-step {
  border-top: 1px solid var(--line);
}

.page-about .auth-step:last-of-type {
  border-bottom: 1px solid var(--line);
}

.page-about .auth-step__sum {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: clamp(16px, 2.2vw, 22px) 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .auth-step__no {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-about .auth-step__name {
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 500;
  color: var(--paper);
}

.page-about .auth-step__hint {
  display: none;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--moss-t);
  white-space: nowrap;
}

.page-about .auth-step__sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

.page-about .auth-step[open] .auth-step__sum::after {
  content: "–";
}

.page-about .auth-step__body {
  padding: 0 0 clamp(16px, 2.2vw, 22px);
}

.page-about .auth-step__body p {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(242, 239, 233, .74);
}

.page-about .auth-step[open] .auth-step__body {
  animation: aboutSlide .28s var(--ease) both;
}

@keyframes aboutSlide {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

.page-about .auth-side {
  display: grid;
  gap: clamp(18px, 2.4vw, 26px);
}

.page-about .auth-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink);
  overflow: hidden;
}

.page-about .auth-figure img {
  display: block;
  width: 100%;
  height: auto;
  opacity: .88;
}

.page-about .auth-side__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .auth-side__list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(242, 239, 233, .76);
}

.page-about .auth-side__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 9px;
  height: 1px;
  background: var(--cyan);
}

/* ---------- 团队 ---------- */
.page-about .analyst-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 1px;
  margin-top: clamp(22px, 3.2vw, 38px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .analyst-card {
  background: var(--ink);
  padding: clamp(18px, 2.4vw, 28px);
  transition: background .22s var(--ease);
}

.page-about .analyst-card:hover {
  background: var(--ink-2);
}

.page-about .analyst-card__k {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .analyst-card__v {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(242, 239, 233, .74);
}

.page-about .analyst-note {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--clay);
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(242, 239, 233, .78);
}

/* ---------- 本地化服务 ---------- */
.page-about .service-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  margin-top: clamp(24px, 3.4vw, 40px);
}

.page-about .service-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink);
  overflow: hidden;
}

.page-about .service-figure img {
  display: block;
  width: 100%;
  height: auto;
  opacity: .86;
}

.page-about .service-facts {
  list-style: none;
  margin: 0 0 clamp(20px, 2.6vw, 30px);
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-about .service-facts li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(242, 239, 233, .78);
}

.page-about .service-facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 9px;
  height: 1px;
  background: var(--cyan);
}

.page-about .srv-contact {
  border-top: 1px solid var(--line);
  padding-top: clamp(16px, 2.2vw, 22px);
  display: grid;
  gap: 12px;
}

.page-about .srv-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
}

.page-about .srv-row__k {
  flex: 0 0 auto;
  width: 68px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--moss-t);
}

.page-about .srv-row__v {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--paper);
  word-break: break-all;
}

/* ---------- 合作生态 ---------- */
.page-about .partner-strip {
  list-style: none;
  margin: clamp(22px, 3.2vw, 38px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .partner-item {
  display: grid;
  gap: 9px;
  align-content: start;
  background: var(--ink);
  padding: clamp(16px, 2.2vw, 24px);
  transition: background .22s var(--ease);
}

.page-about .partner-item:hover,
.page-about .partner-item:focus-within {
  background: var(--ink-2);
}

.page-about .partner-item__no {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--moss-t);
}

.page-about .partner-item__name {
  font-size: 15px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .partner-item__note {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(242, 239, 233, .62);
  transform: translateY(3px);
  transition: transform .24s var(--ease), color .24s var(--ease);
}

.page-about .partner-item:hover .partner-item__note,
.page-about .partner-item:focus-within .partner-item__note {
  transform: none;
  color: var(--cyan);
}

.page-about .partner-caption {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(242, 239, 233, .74);
}

.page-about .recog {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(34px, 5vw, 62px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .recog__award,
.page-about .recog__stat {
  background: var(--ink);
  padding: clamp(22px, 3vw, 36px);
}

.page-about .recog__k {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-about .recog__v {
  margin: 0;
  font-size: clamp(19px, 2.4vw, 26px);
  font-weight: 400;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .recog__num {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(38px, 5.6vw, 60px);
  font-weight: 600;
  line-height: 1;
  color: var(--cyan);
}

.page-about .recog__num span {
  font-size: .48em;
  margin-left: 2px;
}

.page-about .recog__cap {
  margin: 14px 0 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--moss-t);
}

/* ---------- 结尾引导 ---------- */
.page-about .about-cta__inner {
  display: grid;
  gap: 16px;
  justify-items: start;
}

.page-about .about-cta__title {
  margin: 0;
  max-width: 22ch;
  font-size: clamp(24px, 4vw, 40px);
  font-weight: 300;
  line-height: 1.2;
  color: var(--paper);
}

.page-about .about-cta__lede {
  margin: 0;
  max-width: 52ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(242, 239, 233, .74);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .auth-step__hint {
    display: inline;
    margin-left: 11px;
  }
}

@media (min-width: 720px) {
  .page-about .recog {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(230px, .72fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: end;
  }

  .page-about .about-hero__aside {
    border-top: 0;
    border-left: 1px solid var(--line);
    padding: 4px 0 4px clamp(18px, 2.4vw, 30px);
  }
}

@media (min-width: 880px) {
  .page-about .about-journey {
    grid-template-columns: var(--idx-w) minmax(0, 1fr);
    column-gap: clamp(30px, 4.6vw, 72px);
  }

  .page-about .journey-track {
    grid-column: 1 / -1;
  }

  .page-about .journey-index {
    grid-column: 1;
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding: 0 0 0 16px;
    border-left: 1px solid var(--line);
    position: sticky;
    top: 92px;
    align-self: start;
  }

  .page-about .journey-index__link {
    border: 0;
    padding: 7px 0;
  }

  .page-about .journey-index__link:hover,
  .page-about .journey-index__link:focus-visible {
    border-color: transparent;
  }

  .page-about .journey-list {
    grid-column: 2;
  }
}

@media (min-width: 940px) {
  .page-about .auth-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .88fr);
    align-items: start;
  }

  .page-about .service-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .journey-index__link,
  .page-about .analyst-card,
  .page-about .partner-item,
  .page-about .partner-item__note {
    transition: none;
  }

  .page-about .auth-step[open] .auth-step__body {
    animation: none;
  }

  .page-about .partner-item__note {
    transform: none;
  }
}