.page-about {
  position: relative;
  background: var(--ink-800);
  color: var(--fog);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 28px) 0 56px;
  background:
    radial-gradient(120% 80% at 88% -10%, rgba(201, 169, 110, .20), transparent 62%),
    radial-gradient(80% 60% at 0% 110%, rgba(0, 229, 255, .10), transparent 65%),
    linear-gradient(180deg, var(--ink-900) 0%, var(--ink-800) 100%);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__skyline {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 200px;
  color: var(--gold);
  opacity: .15;
  pointer-events: none;
}

.page-about .about-hero__skyline path {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.2;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 26px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-hero__lead .eyebrow {
  margin-bottom: 14px;
}

.page-about .about-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(1.9rem, 5vw, 3.3rem);
  line-height: 1.2;
  font-weight: 900;
  letter-spacing: -.02em;
  background: linear-gradient(100deg, var(--gold-light) 0%, var(--gold) 58%, #a8874f 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-hero__text {
  margin: 0 0 26px;
  max-width: 48ch;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(245, 241, 232, .88);
}

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

/* 概况面板 */
.page-about .about-card {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(17, 41, 74, .84), rgba(6, 20, 40, .74));
  box-shadow: var(--shadow);
  padding: 22px 20px;
}

.page-about .about-card__title {
  margin: 0 0 12px;
  font-size: .72rem;
  letter-spacing: .2em;
  color: var(--gold);
}

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

.page-about .about-card__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
  padding: 9px 0;
  border-bottom: 1px dashed rgba(201, 169, 110, .16);
}

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

.page-about .about-card__row dt {
  flex: 0 0 auto;
  font-size: .8125rem;
  color: var(--muted);
}

.page-about .about-card__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .8125rem;
  line-height: 1.55;
  text-align: right;
  color: var(--fog);
}

.page-about .about-card__note {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: .78rem;
  color: var(--muted);
}

.page-about .about-dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 3px rgba(74, 222, 128, .16);
}

/* ---------- 主体布局 ---------- */
.page-about .about-body {
  padding: 40px 0 24px;
}

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

.page-about .about-rail__title {
  margin: 0 0 10px;
  font-size: .7rem;
  letter-spacing: .2em;
  color: var(--muted);
}

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color .16s var(--ease), border-color .16s var(--ease), background-color .16s var(--ease);
}

.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .04em;
}

.page-about .about-rail__label {
  font-size: .78rem;
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible,
.page-about .about-rail__link.is-active {
  color: var(--gold-light);
  border-color: var(--line-strong);
  background: rgba(201, 169, 110, .10);
}

.page-about .about-rail__link.is-active {
  box-shadow: inset 3px 0 0 var(--gold);
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  padding-bottom: 52px;
}

.page-about .about-sec + .about-sec {
  border-top: 1px solid var(--line);
  padding-top: 44px;
}

.page-about .about-sec__eyebrow {
  margin: 0 0 10px;
  font-size: .74rem;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-about .about-sec__title {
  margin: 0 0 14px;
  font-size: clamp(1.3rem, 3.2vw, 1.9rem);
  line-height: 1.4;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--fog);
}

.page-about .about-sec__title::after {
  content: "";
  display: block;
  width: 44px;
  height: 2px;
  margin-top: 14px;
  background: linear-gradient(90deg, var(--gold), transparent);
}

.page-about .about-sec__note {
  margin: 16px 0 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: rgba(245, 241, 232, .72);
}

/* 图片容器 */
.page-about .figure {
  margin: 0;
}

.page-about .figure__media {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-700);
}

.page-about .figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .figure__caption {
  margin-top: 10px;
  font-size: .78rem;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 起点章节 ---------- */
.page-about .about-origin {
  display: grid;
  gap: 24px;
  margin-top: 22px;
}

.page-about .about-origin__text p {
  margin: 0 0 14px;
  font-size: .9688rem;
  line-height: 1.85;
  color: rgba(245, 241, 232, .86);
}

.page-about .about-list {
  display: grid;
  gap: 10px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-list li {
  position: relative;
  padding-left: 18px;
  font-size: .9125rem;
  line-height: 1.72;
  color: rgba(245, 241, 232, .82);
}

.page-about .about-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 6px;
  height: 6px;
  border: 1px solid var(--gold);
  transform: rotate(45deg);
}

.page-about .about-list strong {
  margin-right: 8px;
  font-weight: 600;
  color: var(--gold-light);
}

.page-about .about-origin__figure {
  border-top: 1px solid var(--line);
  padding-top: 20px;
}

/* ---------- 时间线 ---------- */
.page-about .tl {
  position: relative;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--line-strong), rgba(201, 169, 110, .05));
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 28px 32px;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 8px;
  width: 11px;
  height: 11px;
  border: 1px solid var(--gold);
  border-radius: 50%;
  background: var(--ink-800);
}

.page-about .tl__item:last-child {
  padding-bottom: 0;
}

.page-about .tl__year {
  margin: 0 0 4px;
  font-size: .875rem;
  letter-spacing: .1em;
  color: var(--gold);
}

.page-about .tl__title {
  margin: 0 0 8px;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--fog);
}

.page-about .tl__desc {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: rgba(245, 241, 232, .78);
}

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

/* ---------- 能力演进 ---------- */
.page-about .cap {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.page-about .cap__item {
  padding: 18px 18px 16px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--gold);
  border-radius: var(--radius-sm);
  background: rgba(17, 41, 74, .45);
  transition: border-color .16s var(--ease), background-color .16s var(--ease);
}

.page-about .cap__item:hover {
  border-color: var(--line-strong);
  border-left-color: var(--gold-light);
  background: rgba(17, 41, 74, .72);
}

.page-about .cap__key {
  margin: 0 0 6px;
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-about .cap__item h3 {
  margin: 0 0 8px;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--fog);
}

.page-about .cap__item p {
  margin: 0 0 10px;
  font-size: .9375rem;
  line-height: 1.78;
  color: rgba(245, 241, 232, .8);
}

.page-about .cap__meta {
  margin: 0;
  font-size: .74rem;
  letter-spacing: .06em;
  color: var(--gold);
}

/* ---------- 团队 ---------- */
.page-about .team {
  display: grid;
  gap: 24px;
  margin-top: 24px;
}

.page-about .team__grid {
  display: grid;
  gap: 14px;
}

.page-about .team__item {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: linear-gradient(150deg, rgba(17, 41, 74, .6), rgba(11, 31, 58, .32));
}

.page-about .team__num {
  margin: 0 0 8px;
  font-size: 1.5rem;
  font-weight: 500;
  line-height: 1;
  color: transparent;
  background: linear-gradient(180deg, var(--gold-light), var(--gold));
  -webkit-background-clip: text;
  background-clip: text;
}

.page-about .team__name {
  margin: 0 0 8px;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--fog);
}

.page-about .team__desc {
  margin: 0;
  font-size: .9125rem;
  line-height: 1.8;
  color: rgba(245, 241, 232, .78);
}

.page-about .team__figure {
  align-self: start;
}

/* ---------- 服务地域 ---------- */
.page-about .cover {
  display: grid;
  gap: 24px;
  margin-top: 24px;
}

.page-about .cover__figure {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 0;
  padding: 20px 22px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: radial-gradient(120% 140% at 0% 0%, rgba(201, 169, 110, .16), transparent 70%);
}

.page-about .cover__num {
  font-size: clamp(2.6rem, 8vw, 4rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -.03em;
  color: transparent;
  background: linear-gradient(160deg, var(--gold-light), var(--gold) 70%);
  -webkit-background-clip: text;
  background-clip: text;
}

.page-about .cover__unit {
  font-size: .875rem;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .cover__scenes {
  display: grid;
  gap: 16px;
}

.page-about .cover__scene {
  padding-left: 16px;
  border-left: 1px solid var(--line-strong);
}

.page-about .cover__scene h3 {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--gold-light);
}

.page-about .cover__scene p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: rgba(245, 241, 232, .8);
}

/* ---------- 运营信息 ---------- */
.page-about .trust {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.page-about .trust__block {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(6, 20, 40, .5);
}

.page-about .trust__key {
  margin: 0 0 6px;
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--muted);
}

.page-about .trust__val {
  margin: 0 0 8px;
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--fog);
}

.page-about .trust__val--sm {
  font-size: .9375rem;
  font-weight: 500;
  line-height: 1.7;
}

.page-about .trust__note {
  margin: 0;
  font-size: .8438rem;
  line-height: 1.75;
  color: rgba(245, 241, 232, .7);
}

.page-about .reach {
  margin-top: 22px;
  padding: 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(17, 41, 74, .7), rgba(6, 20, 40, .6));
}

.page-about .reach__title {
  margin: 0 0 12px;
  font-size: .72rem;
  letter-spacing: .2em;
  color: var(--gold);
}

.page-about .reach__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding: 10px 0;
  border-top: 1px dashed rgba(201, 169, 110, .18);
}

.page-about .reach__row:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.page-about .reach__key {
  flex: 0 0 auto;
  min-width: 64px;
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-about .reach__val {
  flex: 1 1 190px;
  min-width: 0;
  font-size: .8438rem;
  line-height: 1.6;
  word-break: break-all;
  color: var(--fog);
}

/* ---------- 结尾 CTA ---------- */
.page-about .about-cta {
  display: grid;
  gap: 20px;
  margin: 8px 0 0;
  padding: 26px 22px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background:
    radial-gradient(110% 130% at 100% 0%, rgba(0, 229, 255, .12), transparent 62%),
    linear-gradient(160deg, rgba(17, 41, 74, .82), rgba(6, 20, 40, .7));
  box-shadow: var(--shadow);
}

.page-about .about-cta h2 {
  margin: 0 0 10px;
  font-size: clamp(1.15rem, 2.8vw, 1.5rem);
  line-height: 1.45;
  font-weight: 800;
  color: var(--gold-light);
}

.page-about .about-cta p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: rgba(245, 241, 232, .8);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .about-body {
    padding: 52px 0 32px;
  }

  .page-about .team__grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .cover__scenes {
    grid-template-columns: 1fr 1fr;
    gap: 18px 20px;
  }

  .page-about .cover__scene:last-child {
    grid-column: 1 / -1;
  }

  .page-about .trust {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .trust__block:first-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: calc(var(--header-h) + 56px) 0 76px;
  }

  .page-about .about-hero__skyline {
    height: 240px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-layout {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__link {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    width: 100%;
    padding: 8px 12px;
    border-color: transparent;
    border-radius: var(--radius-sm);
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible,
  .page-about .about-rail__link.is-active {
    border-color: var(--line);
  }

  .page-about .about-rail__num {
    font-size: .9375rem;
    color: var(--gold);
  }

  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .about-origin__figure {
    border-top: 0;
    padding-top: 0;
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-about .cap {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .page-about .cap__item {
    padding: 22px 22px 18px;
  }

  .page-about .team {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .cover {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .cover__figure {
    flex-direction: column;
    gap: 10px;
    padding: 24px 20px;
    text-align: left;
  }

  .page-about .cover__scenes {
    grid-template-columns: 1fr 1fr;
    gap: 20px 24px;
  }

  .page-about .trust {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .trust__block:first-child {
    grid-column: auto;
  }

  .page-about .reach {
    padding: 22px 24px;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
    padding: 34px 32px;
  }

  .page-about .about-cta__actions {
    flex-wrap: nowrap;
  }
}

@media (min-width: 1200px) {
  .page-about .about-layout {
    grid-template-columns: 186px minmax(0, 1fr);
    gap: 72px;
  }

  .page-about .tl__item {
    padding-left: 38px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__link,
  .page-about .cap__item {
    transition: none;
  }
}