.page-about {
  --a-gap: clamp(52px, 8vw, 108px);
  --a-ink-panel: linear-gradient(152deg, rgba(31, 41, 55, .86), rgba(17, 24, 39, .72));
  color: var(--paper);
}

.page-about .a-section {
  position: relative;
  padding: var(--a-gap) 0;
}

.page-about .a-section + .a-section {
  border-top: 1px solid var(--line);
}

/* ---------- 首屏框景 ---------- */
.page-about .a-hero {
  position: relative;
  padding: clamp(28px, 5vw, 68px) 0 clamp(40px, 6vw, 84px);
}

.page-about .a-hero__grid {
  display: grid;
  gap: 26px;
  align-items: center;
}

.page-about .a-hero__frame {
  position: relative;
  padding: clamp(22px, 3.6vw, 46px);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: linear-gradient(158deg, rgba(31, 41, 55, .6), rgba(11, 18, 32, .25));
  overflow: hidden;
}

.page-about .a-hero__frame::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12%;
  width: 2px;
  height: 44%;
  background: linear-gradient(180deg, var(--cyan), rgba(34, 211, 238, 0));
  border-radius: var(--radius-pill);
}

.page-about .a-hero__frame::after {
  content: "";
  position: absolute;
  right: 0;
  top: clamp(18px, 3vw, 34px);
  width: 64px;
  height: 12px;
  background: repeating-linear-gradient(90deg, var(--line-cyan) 0 1px, transparent 1px 8px);
  pointer-events: none;
}

.page-about .a-hero .breadcrumbs {
  margin-bottom: 18px;
}

.page-about .a-hero__title {
  margin: 10px 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 6vw, 4rem);
  line-height: 1.06;
  letter-spacing: -.02em;
}

.page-about .a-hero__lead {
  max-width: 46ch;
  margin: 0 0 24px;
  color: var(--mist);
  font-size: clamp(1rem, 1.3vw, 1.12rem);
  line-height: 1.8;
}

.page-about .a-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
}

.page-about .a-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .a-hero__media {
  margin: 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.page-about .a-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-about .a-hero__caption {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .06em;
  color: var(--mist);
}

/* ---------- 章节跳转条 ---------- */
.page-about .a-jump {
  position: sticky;
  top: var(--topbar-h);
  z-index: 6;
  background: rgba(11, 18, 32, .9);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .a-jump__inner {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 0;
}

.page-about .a-jump__label {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .a-jump ul {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 2px 2px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .a-jump ul::-webkit-scrollbar {
  display: none;
}

.page-about .a-jump a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  color: var(--mist);
  font-size: .84rem;
  text-decoration: none;
  white-space: nowrap;
  transition: color .25s var(--ease), border-color .25s var(--ease), background .25s var(--ease);
}

.page-about .a-jump a .mono {
  font-size: .72rem;
  color: var(--cyan);
}

.page-about .a-jump a:hover {
  color: var(--paper);
  border-color: var(--line-cyan);
  background: rgba(34, 211, 238, .1);
}

/* ---------- 通用标题 ---------- */
.page-about h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  line-height: 1.16;
  letter-spacing: -.01em;
}

.page-about .a-section > .wrap > p,
.page-about .a-scale__main > p,
.page-about .a-eco__text > p {
  color: var(--mist);
  line-height: 1.8;
}

/* ---------- 01 品牌起点 ---------- */
.page-about .a-start {
  display: grid;
  gap: 28px;
}

.page-about .a-start__intro p {
  color: var(--mist);
  line-height: 1.85;
}

.page-about .a-start__intro p:first-of-type {
  margin-top: 20px;
  color: rgba(248, 250, 252, .88);
}

.page-about .a-start__note {
  padding: 24px 26px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  border-radius: var(--radius-l);
  background: var(--a-ink-panel);
}

.page-about .a-start__notelabel {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}

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

.page-about .a-start__people li {
  position: relative;
  padding-left: 20px;
  color: var(--paper);
  font-size: .96rem;
}

.page-about .a-start__people li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 9px;
  height: 2px;
  border-radius: var(--radius-pill);
  background: var(--orange);
}

/* ---------- 02 跟队场景 ---------- */
.page-about .a-section--needs {
  background: linear-gradient(180deg, rgba(31, 41, 55, .3), rgba(11, 18, 32, 0) 68%);
}

.page-about .a-needs {
  margin-top: 34px;
}

.page-about .a-need {
  position: relative;
  display: flex;
  flex-direction: column;
  border-left: 2px solid transparent;
  transition: border-color .3s var(--ease);
}

.page-about .a-need:hover {
  border-left-color: var(--cyan);
}

.page-about .a-need__no {
  display: block;
  margin-bottom: 10px;
  font-size: .76rem;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-about .a-need .card__text {
  margin-bottom: 0;
}

/* ---------- 03 时间线 ---------- */
.page-about .a-section--timeline {
  background: linear-gradient(200deg, rgba(34, 211, 238, .06), rgba(11, 18, 32, 0) 55%);
}

.page-about .a-timeline {
  position: relative;
  display: grid;
  gap: 14px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .a-timeline__item {
  position: relative;
}

.page-about .a-timeline__item .accordion__head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  background: var(--a-ink-panel);
  cursor: pointer;
  transition: border-color .3s var(--ease), transform .3s var(--ease), background .3s var(--ease);
}

.page-about .a-timeline__item .accordion__head:hover {
  border-color: var(--line-cyan);
  transform: translateY(-2px);
  background: linear-gradient(152deg, rgba(31, 41, 55, .95), rgba(17, 24, 39, .8));
}

.page-about .a-timeline__ver {
  flex: 0 0 auto;
  padding: 5px 12px;
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius-pill);
  color: var(--cyan);
  font-size: .72rem;
  letter-spacing: .1em;
  white-space: nowrap;
}

.page-about .a-timeline__title {
  flex: 1 1 auto;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1rem, 2vw, 1.28rem);
  line-height: 1.3;
}

.page-about .a-timeline__item .accordion__panel {
  padding: 0 20px;
}

.page-about .a-timeline__item .accordion__panel p {
  margin: 14px 0 4px;
  padding-left: 16px;
  border-left: 1px solid var(--line);
  color: var(--mist);
  font-size: .96rem;
  line-height: 1.8;
}

/* ---------- 04 服务规模 ---------- */
.page-about .a-scale {
  display: grid;
  gap: 30px;
  align-items: start;
}

.page-about .a-scale__main > p {
  margin: 18px 0 26px;
  max-width: 48ch;
}

.page-about .a-scale__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .a-scale__stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.page-about .a-scale__label {
  color: var(--mist);
  font-size: .86rem;
  line-height: 1.65;
}

.page-about .a-scale__media {
  margin: 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-about .a-scale__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .a-scale__caption {
  margin: 0;
  padding: 14px 18px;
  background: rgba(17, 24, 39, .82);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .04em;
}

.page-about .a-scale__foot {
  margin-top: 30px;
  padding: 18px 22px;
  border: 1px dashed var(--line-cyan);
  border-radius: var(--radius-l);
  color: var(--mist);
  font-size: .92rem;
  line-height: 1.8;
}

/* ---------- 05 合作与认可 ---------- */
.page-about .a-section--eco {
  background: radial-gradient(120% 90% at 88% 0%, rgba(251, 146, 60, .09), rgba(11, 18, 32, 0) 62%);
}

.page-about .a-eco__grid {
  display: grid;
  gap: 28px;
  align-items: center;
}

.page-about .a-eco__text > p {
  margin: 18px 0 22px;
}

.page-about .a-eco__text > p + p {
  margin-top: -8px;
}

.page-about .a-eco__media {
  margin: 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-about .a-eco__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .a-honor {
  display: grid;
  gap: 16px;
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .a-honor__item {
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  background: linear-gradient(150deg, rgba(31, 41, 55, .7), rgba(17, 24, 39, .55));
  transition: transform .32s var(--ease), border-color .32s var(--ease), box-shadow .32s var(--ease);
}

.page-about .a-honor__item:hover {
  transform: translateY(-5px);
  border-color: rgba(245, 158, 11, .5);
  box-shadow: var(--shadow-card);
}

.page-about .a-honor__name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.06rem;
  color: var(--paper);
}

.page-about .a-honor__desc {
  margin: 0;
  color: var(--mist);
  font-size: .88rem;
  line-height: 1.7;
}

.page-about .a-honor__item--count {
  display: flex;
  align-items: center;
  gap: 16px;
  background: linear-gradient(150deg, rgba(251, 146, 60, .16), rgba(17, 24, 39, .6));
  border-color: rgba(251, 146, 60, .34);
}

.page-about .a-honor__count {
  margin: 0;
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
}

.page-about .a-honor__item--count .a-honor__desc {
  margin: 0;
}

/* ---------- 06 服务方式 ---------- */
.page-about .a-voice {
  margin-top: 34px;
}

.page-about .a-voice__card {
  display: flex;
  flex-direction: column;
}

.page-about .a-voice__card .card__text {
  margin-bottom: 0;
}

.page-about .a-voice__card--warm {
  border-color: rgba(251, 146, 60, .34);
  background: linear-gradient(155deg, rgba(251, 146, 60, .14), rgba(17, 24, 39, .68));
}

.page-about .a-voice__card--warm .card__title {
  color: var(--orange);
}

.page-about .a-voice__cta {
  margin-top: 34px;
  padding: 24px 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--a-ink-panel);
}

.page-about .a-voice__ctalabel {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .a-voice__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 760px) {
  .page-about .a-jump {
    top: 0;
  }

  .page-about .a-hero__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    gap: 38px;
  }

  .page-about .a-start {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, .9fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .a-scale {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 46px;
  }

  .page-about .a-scale__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px 28px;
  }

  .page-about .a-eco__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 46px;
  }

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

  .page-about .a-voice__cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 26px 34px;
  }

  .page-about .a-voice__ctalabel {
    margin: 0;
  }
}

/* ---------- 桌面：斜向时间线 ---------- */
@media (min-width: 1024px) {
  .page-about .a-timeline::before {
    content: "";
    position: absolute;
    left: 16px;
    top: 8px;
    bottom: 8px;
    width: 1px;
    background: linear-gradient(180deg, var(--cyan), rgba(34, 211, 238, .06));
    transform: rotate(7deg);
    transform-origin: top center;
    opacity: .55;
    pointer-events: none;
  }

  .page-about .a-timeline__item:nth-child(1) { margin-left: 0; }
  .page-about .a-timeline__item:nth-child(2) { margin-left: 5%; }
  .page-about .a-timeline__item:nth-child(3) { margin-left: 10%; }
  .page-about .a-timeline__item:nth-child(4) { margin-left: 15%; }
}

/* ---------- 大屏 ---------- */
@media (min-width: 1180px) {
  .page-about .a-hero__grid {
    gap: 52px;
  }

  .page-about .a-scale__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px 34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .a-need,
  .page-about .a-honor__item,
  .page-about .a-timeline__item .accordion__head,
  .page-about .a-jump a {
    transition: none;
  }
}