.page-about {
  background: var(--night);
  color: var(--paper);
  padding-top: var(--header-h);
  overflow-x: clip;
}

.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 clamp(28px, 4vw, 48px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}
.page-about .breadcrumbs__link {
  color: var(--mist);
  text-decoration: none;
  transition: color 0.16s ease;
}
.page-about .breadcrumbs__link:hover,
.page-about .breadcrumbs__link:focus-visible {
  color: var(--gold-soft);
}
.page-about .breadcrumbs__sep {
  color: rgba(168, 182, 196, 0.4);
}
.page-about .breadcrumbs__item[aria-current="page"] {
  color: var(--gold);
}

.page-about .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--gold);
  text-transform: uppercase;
}

.page-about .about-title {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(26px, 4.2vw, 44px);
  line-height: 1.16;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-about .about-p {
  margin: 18px 0 0;
  max-width: 62ch;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.95;
  color: var(--mist);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 4vw, 48px) 0 clamp(48px, 7vw, 96px);
  overflow: hidden;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -32%;
  right: -14%;
  width: min(620px, 90vw);
  height: min(620px, 90vw);
  background: radial-gradient(circle, rgba(233, 180, 92, 0.15), rgba(233, 180, 92, 0) 66%);
  pointer-events: none;
}
.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 56px);
}
.page-about .about-hero__title {
  margin: 20px 0 0;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(44px, 9vw, 104px);
  line-height: 0.98;
  letter-spacing: -0.045em;
  color: var(--paper);
}
.page-about .about-hero__accent {
  color: var(--gold);
}
.page-about .about-hero__lede {
  margin: 26px 0 0;
  max-width: 46ch;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.9;
  color: var(--mist);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: clamp(28px, 4vw, 40px);
}
.page-about .about-hero__index {
  align-self: end;
  padding: 20px 20px 6px;
  border: 1px solid var(--line-gold);
  border-radius: var(--radius-m);
  background: linear-gradient(155deg, rgba(28, 61, 92, 0.72), rgba(16, 40, 63, 0.94));
  backdrop-filter: blur(10px);
}
.page-about .about-hero__index-title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--mist);
  text-transform: uppercase;
}
.page-about .about-hero__index-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-hero__index-list a {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 11px 2px;
  border-top: 1px solid rgba(168, 182, 196, 0.14);
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--paper);
  text-decoration: none;
  transition: color 0.16s ease, padding-left 0.16s ease;
}
.page-about .about-hero__index-list li:first-child a {
  border-top: 0;
}
.page-about .about-hero__index-list a:hover,
.page-about .about-hero__index-list a:focus-visible {
  color: var(--gold-soft);
  padding-left: 8px;
}
.page-about .about-hero__index-list .mono {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

/* 起点 */
.page-about .about-origin {
  padding: clamp(48px, 7vw, 96px) 0;
  border-top: 1px solid var(--line-soft);
}
.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: center;
}
.page-about .about-origin__figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line-cool);
  border-radius: var(--radius-m);
  background: var(--panel);
}
.page-about .about-origin__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-origin__figure figcaption {
  padding: 14px 18px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}
.page-about .about-origin__facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: clamp(18px, 3vw, 36px);
  margin: 28px 0 0;
  padding: 24px 0 0;
  border-top: 1px solid var(--line-gold);
}
.page-about .about-origin__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.page-about .about-origin__facts .mono {
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--gold);
}
.page-about .about-origin__facts li span:last-child {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--mist);
}

/* 时间轴 */
.page-about .about-timeline {
  position: relative;
  padding: clamp(48px, 7vw, 96px) 0;
  border-top: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(16, 40, 63, 0.55), rgba(8, 19, 31, 0) 72%);
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(168, 182, 196, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168, 182, 196, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
}
.page-about .about-timeline > .shell {
  position: relative;
}
.page-about .about-timeline__head {
  max-width: 720px;
}
.page-about .about-timeline__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(32px, 5vw, 56px);
}
.page-about .about-timeline__rail {
  position: relative;
  padding-left: 20px;
}
.page-about .about-timeline__rail::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), rgba(233, 180, 92, 0.06));
}
.page-about .about-timeline__rail-years {
  margin: 0;
  font-size: clamp(28px, 3.6vw, 40px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--paper);
}
.page-about .about-timeline__rail-years span {
  padding: 0 4px;
  color: var(--gold);
}
.page-about .about-timeline__rail-note {
  margin: 12px 0 0;
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--mist);
}
.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
}
.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}
.page-about .about-timeline__year {
  margin: 0;
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--gold);
}
.page-about .about-timeline__card {
  position: relative;
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--line-cool);
  border-radius: var(--radius-m);
  background: var(--panel);
  transition: border-color 0.16s ease, transform 0.16s ease;
}
.page-about .about-timeline__card:hover {
  border-color: var(--line-gold);
  transform: translateY(-2px);
}
.page-about .about-timeline__card h3 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(17px, 2vw, 21px);
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-about .about-timeline__card p {
  margin: 10px 0 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

/* 时间轴配图 */
.page-about .about-band {
  position: relative;
  margin: clamp(36px, 5vw, 64px) 0 0;
  overflow: hidden;
  border: 1px solid var(--line-cool);
  border-radius: var(--radius-l);
  background: var(--glass);
}
.page-about .about-band img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  opacity: 0.92;
}
.page-about .about-band figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 16px clamp(16px, 3vw, 28px);
  background: linear-gradient(0deg, rgba(5, 11, 18, 0.94), rgba(5, 11, 18, 0));
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.6;
  color: var(--paper);
}

/* 做事方法 */
.page-about .about-method {
  padding: clamp(48px, 7vw, 96px) 0;
  border-top: 1px solid var(--line-soft);
}
.page-about .about-method__head {
  max-width: 760px;
}
.page-about .about-method__steps {
  list-style: none;
  margin: clamp(30px, 4vw, 48px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2vw, 20px);
}
.page-about .about-method__step {
  padding: clamp(20px, 2.8vw, 28px);
  border: 1px solid var(--line-cool);
  border-radius: var(--radius-m);
  background: linear-gradient(160deg, rgba(28, 61, 92, 0.5), rgba(16, 40, 63, 0.92));
  transition: border-color 0.16s ease, transform 0.16s ease;
}
.page-about .about-method__step:hover {
  border-color: var(--line-gold);
  transform: translateY(-2px);
}
.page-about .about-method__no {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--gold);
}
.page-about .about-method__step h3 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 19px;
  color: var(--paper);
}
.page-about .about-method__step p:last-child {
  margin: 10px 0 0;
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}
.page-about .about-method__note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: clamp(20px, 3vw, 28px);
  padding: 16px 20px;
  border-left: 3px solid var(--celadon);
  border-radius: var(--radius-s);
  background: rgba(117, 184, 164, 0.08);
}
.page-about .about-method__note p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--paper);
}
.page-about .about-method__band {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: clamp(20px, 3vw, 28px) 0 0;
  border-top: 1px solid var(--line-gold);
}
.page-about .about-method__band dt {
  font-size: clamp(26px, 3.4vw, 36px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--gold);
}
.page-about .about-method__band dd {
  margin: 8px 0 0;
  font-family: var(--font-body);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* 团队：浅色反转区 */
.page-about .about-team {
  padding: clamp(52px, 8vw, 104px) 0;
  background: var(--paper);
  color: var(--night);
}
.page-about .about-team .eyebrow {
  color: var(--glass);
}
.page-about .about-team .about-title {
  color: var(--ink);
}
.page-about .about-team .about-p {
  color: rgba(8, 19, 31, 0.74);
}
.page-about .about-team__head {
  max-width: 720px;
}
.page-about .about-team__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  margin-top: clamp(30px, 4vw, 48px);
  align-items: start;
}
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}
.page-about .about-team__card {
  padding: clamp(18px, 2.4vw, 24px);
  border: 1px solid rgba(8, 19, 31, 0.12);
  border-radius: var(--radius-m);
  background: rgba(255, 255, 255, 0.62);
  transition: transform 0.16s ease, box-shadow 0.16s ease, border-color 0.16s ease;
}
.page-about .about-team__card:hover {
  transform: translateY(-2px);
  border-color: rgba(233, 180, 92, 0.8);
  box-shadow: 0 16px 32px -24px rgba(8, 19, 31, 0.65);
}
.page-about .about-team__num {
  margin: 0;
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--glass);
}
.page-about .about-team__card h3 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16px;
  letter-spacing: 0.01em;
  color: var(--ink);
}
.page-about .about-team__card p:last-child {
  margin: 8px 0 0;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.8;
  color: rgba(8, 19, 31, 0.7);
}
.page-about .about-team__figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(8, 19, 31, 0.14);
  border-radius: var(--radius-m);
  background: var(--night);
}
.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-team__figure figcaption {
  padding: 14px 18px;
  background: var(--night);
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* 服务范围与通信 */
.page-about .about-region {
  padding: clamp(48px, 7vw, 96px) 0;
  border-top: 1px solid var(--line-soft);
}
.page-about .about-region__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
}
.page-about .about-region__stats {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: clamp(20px, 3vw, 40px);
  margin: 28px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--line-gold);
}
.page-about .about-region__stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.page-about .about-region__stats .mono {
  font-size: clamp(22px, 2.8vw, 30px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--gold);
}
.page-about .about-region__stats li span:last-child {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--mist);
}
.page-about .about-region__card {
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid var(--line-cool);
  border-radius: var(--radius-m);
  background: var(--panel);
}
.page-about .about-region__card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-about .about-region__card dl {
  display: grid;
  gap: 16px;
  margin: 20px 0 0;
}
.page-about .about-region__card dt {
  margin: 0 0 5px;
  font-family: var(--font-body);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
}
.page-about .about-region__card dd {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper);
}
.page-about .about-region__card dd.mono {
  font-size: 14px;
  letter-spacing: 0.03em;
  word-break: break-all;
}
.page-about .about-region__note {
  margin: 20px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-body);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}
.page-about .about-region__card .btn {
  margin-top: 20px;
}

/* 继续查看 */
.page-about .about-next {
  padding: clamp(48px, 7vw, 96px) 0 clamp(56px, 8vw, 120px);
  border-top: 1px solid var(--line-soft);
}
.page-about .about-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(26px, 4vw, 40px);
}
.page-about .about-next__card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 2.8vw, 28px);
  border: 1px solid var(--line-cool);
  border-radius: var(--radius-m);
  background: var(--panel);
  text-decoration: none;
  transition: border-color 0.16s ease, transform 0.16s ease;
}
.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible {
  border-color: var(--line-gold);
  transform: translateY(-2px);
}
.page-about .about-next__card .tag {
  align-self: flex-start;
}
.page-about .about-next__card h3 {
  margin: 4px 0 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 19px;
  color: var(--paper);
}
.page-about .about-next__card p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}
.page-about .about-next__arrow {
  margin-top: auto;
  padding-top: 10px;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--gold);
}

@media (min-width: 600px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 640px) {
  .page-about .about-timeline__item {
    grid-template-columns: 110px minmax(0, 1fr);
    gap: clamp(16px, 3vw, 28px);
    align-items: start;
  }
  .page-about .about-band img {
    aspect-ratio: 21 / 9;
  }
}

@media (min-width: 700px) {
  .page-about .about-method__band {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (min-width: 760px) {
  .page-about .about-method__steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-about .about-next__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
  .page-about .about-timeline__body {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
  }
  .page-about .about-timeline__rail {
    position: sticky;
    top: calc(var(--header-h) + 32px);
    align-self: start;
  }
  .page-about .about-region__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-team__body {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

@media (min-width: 1180px) {
  .page-about .about-timeline__item:nth-child(even) {
    padding-left: clamp(20px, 3vw, 56px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__card,
  .page-about .about-method__step,
  .page-about .about-team__card,
  .page-about .about-next__card,
  .page-about .about-hero__index-list a {
    transition: none;
  }
  .page-about .about-timeline__card:hover,
  .page-about .about-method__step:hover,
  .page-about .about-team__card:hover,
  .page-about .about-next__card:hover {
    transform: none;
  }
  .page-about .about-hero__index-list a:hover {
    padding-left: 2px;
  }
}