/* ===== 品牌文化页 /culture/ ===== */
.page-about {
  --about-shadow: 6px 6px 0 rgba(6, 18, 15, 0.72);
  --about-anchor-offset: calc(var(--strip-h) + 28px);
  padding-bottom: 88px;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  margin: 20px 0 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--stone);
  text-transform: uppercase;
}

.page-about .breadcrumb a {
  color: var(--cyan);
  text-decoration: none;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  text-decoration: underline;
}

.page-about .breadcrumb__sep {
  margin: 0 8px;
  color: var(--line);
}

.page-about .breadcrumb__current {
  color: var(--stone);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: 26px;
  padding: 20px 0 44px;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 8.6vw, 68px);
  line-height: 1.06;
  letter-spacing: -0.025em;
  color: var(--bone);
  text-wrap: balance;
}

.page-about .about-hero__mark {
  color: var(--cyan);
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--stone);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

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

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

/* ---------- 数据条 ---------- */
.page-about .about-bar {
  margin-bottom: 44px;
}

/* ---------- 主布局：章节索引 + 长文 ---------- */
.page-about .about-layout {
  display: grid;
  gap: 28px;
}

.page-about .about-index {
  padding: 16px 18px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-left: 4px solid var(--cyan);
}

.page-about .about-index__caption {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--yellow);
  text-transform: uppercase;
}

.page-about .about-index__list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 8px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--stone);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--bone);
  background: rgba(53, 240, 208, 0.08);
  border-left-color: var(--cyan);
}

.page-about .about-index__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--yellow);
}

/* ---------- 章节通用 ---------- */
.page-about .about-stream {
  min-width: 0;
}

.page-about .about-sec {
  position: relative;
  padding: 34px 0 6px;
  scroll-margin-top: var(--about-anchor-offset);
}

.page-about .about-sec + .about-sec {
  margin-top: 40px;
}

.page-about .about-sec::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 68px;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--yellow));
}

.page-about .about-sec__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  flex-wrap: wrap;
}

.page-about .about-sec h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 5.4vw, 40px);
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--bone);
}

.page-about .about-sec__lead {
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--bone);
  max-width: 40em;
}

.page-about .about-sec p {
  margin: 14px 0 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--stone);
  max-width: 40em;
}

.page-about .about-sec a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 208, 0.4);
}

.page-about .about-sec a:hover,
.page-about .about-sec a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 时间轴 ---------- */
.page-about .about-history__media {
  margin: 26px 0 0;
}

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

.page-about .timeline {
  position: relative;
  margin: 30px 0 0;
  padding: 0 0 0 30px;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--yellow) 52%, var(--line) 100%);
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 26px 2px;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 5px;
  width: 12px;
  height: 12px;
  background: var(--ink);
  border: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: background 180ms var(--ease), border-color 180ms var(--ease), transform 180ms var(--ease);
}

.page-about .timeline__item:hover::before,
.page-about .timeline__item:focus-within::before {
  background: var(--cyan);
  transform: rotate(45deg) scale(1.18);
}

.page-about .timeline__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--yellow);
}

.page-about .timeline__title {
  margin: 6px 0 0;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--bone);
}

.page-about .timeline__text {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--stone);
  max-width: 40em;
}

/* ---------- 四个维度 ---------- */
.page-about .about-dims__wrap {
  margin-top: 26px;
}

.page-about .about-dims__media {
  margin: 0 0 22px;
}

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

.page-about .dims {
  display: flex;
  gap: 16px;
  margin: 0;
  padding: 4px 0 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .dim-card {
  flex: 0 0 82%;
  min-width: 250px;
  scroll-snap-align: start;
}

.page-about .dim-card .data-card__title {
  margin: 10px 0 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--bone);
}

.page-about .dim-card .data-card__text {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--stone);
}

/* ---------- 复核流程 ---------- */
.page-about .steps {
  display: grid;
  gap: 16px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: about-step;
}

.page-about .steps__item {
  position: relative;
  padding: 20px 20px 20px 64px;
  background: var(--panel);
  border: 2px solid var(--line);
  box-shadow: var(--about-shadow);
  transition: transform 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .steps__item:hover {
  transform: translate(-2px, -2px);
  border-color: var(--cyan);
}

.page-about .steps__item::before {
  counter-increment: about-step;
  content: counter(about-step, decimal-leading-zero);
  position: absolute;
  left: 18px;
  top: 19px;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-about .steps__title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--bone);
}

.page-about .steps__text {
  margin: 8px 0 0 !important;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--stone);
  max-width: 38em;
}

/* ---------- 团队 ---------- */
.page-about .crew {
  display: grid;
  gap: 16px;
  margin: 26px 0 0;
}

.page-about .crew__card {
  padding: 22px 20px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-top: 4px solid var(--cyan);
  box-shadow: var(--about-shadow);
}

.page-about .crew__card--engine {
  border-top-color: var(--yellow);
}

.page-about .crew__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(40px, 11vw, 62px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .crew__card--engine .crew__num {
  color: var(--yellow);
}

.page-about .crew__title {
  margin: 12px 0 0;
  font-size: 19px;
  font-weight: 700;
  color: var(--bone);
}

.page-about .crew__text {
  margin: 10px 0 0 !important;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--stone);
  max-width: 34em;
}

/* ---------- 服务范围事实表 ---------- */
.page-about .facts {
  margin: 26px 0 0;
  border-top: 2px solid var(--line);
}

.page-about .facts__row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 2px solid var(--line);
}

.page-about .facts__key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--yellow);
  text-transform: uppercase;
}

.page-about .facts__val {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--bone);
}

/* ---------- 收尾行动区 ---------- */
.page-about .about-cta {
  position: relative;
  display: grid;
  gap: 22px;
  margin-top: 56px;
  padding: 30px 22px;
  background: linear-gradient(135deg, var(--panel) 0%, var(--ink) 72%);
  border: 2px solid var(--cyan);
  clip-path: polygon(0 0, 100% 2.5%, 100% 100%, 0 97.5%);
}

.page-about .about-cta__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 5.6vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--bone);
}

.page-about .about-cta__text {
  margin: 12px 0 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.74;
  color: var(--stone);
}

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

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-about .dims {
    gap: 18px;
  }

  .page-about .dim-card {
    flex: 0 0 46%;
  }

  .page-about .crew {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .facts__row {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about {
    padding-bottom: 110px;
  }

  .page-about .about-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
    align-items: center;
    padding: 34px 0 58px;
  }

  .page-about .about-hero__lead {
    font-size: 16.5px;
  }

  .page-about .about-bar {
    margin-bottom: 58px;
  }

  .page-about .about-layout {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 58px;
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: var(--about-anchor-offset);
    padding: 20px 18px;
  }

  .page-about .about-sec {
    padding-top: 40px;
  }

  .page-about .about-sec + .about-sec {
    margin-top: 52px;
  }

  .page-about .dims {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
    padding: 0;
    overflow: visible;
  }

  .page-about .dim-card {
    flex: none;
    min-width: 0;
  }

  .page-about .about-dims__wrap {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 30px;
    align-items: start;
  }

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

  .page-about .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
    gap: 36px;
    margin-top: 72px;
    padding: 44px 40px;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1180px) {
  .page-about .about-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 72px;
  }

  .page-about .timeline {
    padding-left: 36px;
  }

  .page-about .timeline__item::before {
    left: -36px;
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .steps__item,
  .page-about .timeline__item::before,
  .page-about .about-index__link {
    transition: none;
  }

  .page-about .steps__item:hover {
    transform: none;
  }
}