.page-about {
  position: relative;
  isolation: isolate;
}

/* ---------- 首屏声明 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(26px, 6vw, 52px) 0 clamp(48px, 8vw, 96px);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(30px, 6vw, 60px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 5vw, 48px);
  align-items: end;
}

.page-about .about-hero__title {
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(38px, 9.4vw, 84px);
  line-height: 1.04;
  letter-spacing: -0.015em;
  margin: 14px 0 22px;
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--mist-dim);
  letter-spacing: 0.02em;
}

.page-about .about-hero__side {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-about .about-hero__stamp {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  text-align: right;
}

.page-about .about-hero__stamp-val {
  font-family: var(--mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__stamp-key {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--mist-faint);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  padding: clamp(54px, 9vw, 108px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-timeline__head {
  max-width: 620px;
  margin-bottom: clamp(34px, 6vw, 66px);
}

.page-about .tl-wrap {
  position: relative;
  padding-left: 0;
  overflow: visible;
}

.page-about .tl-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: min(420px, 62%);
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
  pointer-events: none;
  z-index: 0;
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 18%, #000 76%, transparent);
  mask-image: linear-gradient(180deg, transparent, #000 18%, #000 76%, transparent);
}

.page-about .tl-rail {
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 8px;
  width: 2px;
  z-index: 1;
  display: block;
}

.page-about .tl-list {
  position: relative;
  z-index: 2;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .tl-item {
  position: relative;
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  column-gap: 18px;
  row-gap: 12px;
  padding-bottom: clamp(38px, 6vw, 62px);
}

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

.page-about .tl-node {
  grid-column: 1;
  grid-row: 1;
  display: flex;
  justify-content: center;
  padding-top: 7px;
}

.page-about .tl-dot {
  display: block;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 2px solid var(--neon);
  background: var(--ink);
  box-shadow: 0 0 0 5px rgba(155, 92, 255, 0.1);
  transition: background-color 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
}

.page-about .tl-item:hover .tl-dot,
.page-about .tl-item:focus-within .tl-dot {
  background: var(--neon);
  border-color: var(--electric);
  box-shadow: 0 0 0 6px rgba(155, 92, 255, 0.22), 0 0 18px rgba(155, 92, 255, 0.5);
}

.page-about .tl-year {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding-top: 1px;
}

.page-about .tl-year__num {
  font-family: var(--mono);
  font-size: clamp(26px, 5.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.01em;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(150deg, #FFFFFF 0%, #E8C98A 52%, #9B5CFF 118%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

.page-about .tl-card {
  grid-column: 2;
  grid-row: 2;
  position: relative;
  padding: clamp(20px, 3vw, 30px) clamp(20px, 3vw, 32px);
  background: linear-gradient(150deg, rgba(42, 36, 64, 0.55), rgba(18, 16, 28, 0.86) 58%, rgba(11, 9, 18, 0.92));
  transition: background 0.4s var(--ease);
}

.page-about .tl-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--neon), var(--electric));
  opacity: 0;
  transform: scaleY(0.35);
  transform-origin: top center;
  transition: opacity 0.35s var(--ease), transform 0.45s var(--ease);
  pointer-events: none;
}

.page-about .tl-item:hover .tl-card::before {
  opacity: 1;
  transform: scaleY(1);
}

.page-about .tl-card .panel-title {
  margin: 0 0 10px;
  font-size: clamp(17px, 2.2vw, 20px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--white);
}

.page-about .tl-card .panel-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist-dim);
}

/* ---------- 双路径 ---------- */
.page-about .about-paths {
  padding: clamp(54px, 9vw, 108px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-paths__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 60px);
}

.page-about .about-paths__text {
  margin: 0 0 16px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--mist-dim);
}

.page-about .about-paths__side {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .path-card {
  padding: 22px 24px;
  background: linear-gradient(160deg, rgba(42, 36, 64, 0.5), rgba(11, 9, 18, 0.82));
}

.page-about .path-card__key {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--electric);
}

.page-about .path-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist-dim);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: clamp(54px, 9vw, 108px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 56px);
  align-items: center;
}

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

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 26px 0;
  padding: 22px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-stat__num {
  font-family: var(--mono);
  font-size: clamp(24px, 4.6vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat__label {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist-faint);
}

.page-about .about-team__text {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--mist-dim);
}

.page-about .about-team__text:last-child {
  margin-bottom: 0;
}

/* ---------- 服务区域 ---------- */
.page-about .about-region {
  padding: clamp(54px, 9vw, 108px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-region__banner {
  margin: 0 0 clamp(30px, 5vw, 56px);
}

.page-about .about-region__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 56px);
}

.page-about .about-region__text {
  margin: 0 0 16px;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--mist-dim);
}

.page-about .region-list {
  display: grid;
  gap: 0;
  align-content: start;
  border-top: 1px solid var(--line);
}

.page-about .region-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 18px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .region-item__key {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mist-faint);
}

.page-about .region-item__val {
  font-size: 15px;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}

/* ---------- 资质 ---------- */
.page-about .about-cred {
  padding: clamp(54px, 9vw, 108px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-cred__head {
  max-width: 600px;
  margin-bottom: clamp(30px, 5vw, 54px);
}

.page-about .cred-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid var(--line);
}

.page-about .cred-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 22px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .cred-item__key {
  flex: 0 0 auto;
  min-width: 110px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--neon);
}

.page-about .cred-item__val {
  flex: 1 1 240px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
  font-variant-numeric: tabular-nums;
}

.page-about .about-cred__note {
  margin: 26px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist-faint);
}

/* ---------- 内联链接 ---------- */
.page-about .about-inline-link {
  color: var(--electric);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 225, 255, 0.4);
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease);
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--white);
  border-bottom-color: var(--neon);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding: 0 0 clamp(56px, 9vw, 104px);
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  padding: clamp(28px, 5vw, 48px) clamp(22px, 4vw, 52px);
  background: linear-gradient(140deg, rgba(106, 43, 224, 0.22), rgba(18, 16, 28, 0.92) 52%, rgba(11, 9, 18, 0.96));
}

.page-about .about-cta__title {
  margin: 0 0 8px;
  font-size: clamp(20px, 3.4vw, 28px);
  font-weight: 800;
  line-height: 1.3;
  color: var(--white);
}

.page-about .about-cta__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist-dim);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .region-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
  }
}

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(40px, 6vw, 88px);
  }

  .page-about .about-hero__side {
    flex-direction: column;
    align-items: flex-end;
    justify-content: space-between;
    gap: 32px;
    min-height: 230px;
    padding-top: 0;
    padding-left: 28px;
    border-top: 0;
    border-left: 1px solid var(--line);
  }

  .page-about .about-paths__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 3fr);
    gap: clamp(48px, 7vw, 108px);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(40px, 6vw, 78px);
  }

  .page-about .about-region__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(40px, 6vw, 84px);
    align-items: start;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 32px;
  }
}

@media (min-width: 900px) {
  .page-about .tl-item {
    grid-template-columns: 18px 160px minmax(0, 1fr);
    column-gap: 28px;
    row-gap: 0;
    align-items: start;
  }

  .page-about .tl-node {
    grid-column: 1;
    grid-row: 1;
  }

  .page-about .tl-year {
    grid-column: 2;
    grid-row: 1;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    padding-top: 0;
  }

  .page-about .tl-year__num {
    font-size: clamp(32px, 3.4vw, 46px);
  }

  .page-about .tl-card {
    grid-column: 3;
    grid-row: 1;
  }

  .page-about .tl-bg {
    width: min(520px, 56%);
  }
}

@media (min-width: 1040px) {
  .page-about .about-timeline__head {
    margin-left: clamp(0px, 6vw, 96px);
  }
}