.page-about {
  background: var(--night);
  color: var(--ink);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: 26px;
  padding-bottom: 2px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(30px, 5vw, 56px) clamp(52px, 8vw, 96px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -28% -18% 16%;
  z-index: -1;
  background:
    radial-gradient(48% 54% at 74% 24%, rgba(41, 240, 200, 0.17), transparent 68%),
    radial-gradient(46% 50% at 16% 78%, rgba(14, 127, 106, 0.32), transparent 70%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 34px;
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 60px;
    align-items: center;
  }
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.025em;
  line-height: 1.05;
  font-size: clamp(33px, 8vw, 70px);
  color: var(--ink);
}

.page-about .about-hero__lede {
  margin: 22px 0 0;
  max-width: 40ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-hero__lede--dim {
  margin-top: 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-dim);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 32px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 20px 24px;
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(23px, 4.2vw, 33px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-hero__label {
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: 0.05em;
  color: var(--ink-dim);
}

.page-about .about-hero__media {
  margin: 0;
  border: 1px solid var(--glass-line);
}

/* ---------- 通用章节头 ---------- */
.page-about .about-head {
  margin-bottom: clamp(30px, 4.6vw, 54px);
}

.page-about .about-head .section-title {
  margin-top: 12px;
}

.page-about .about-head .section-note {
  margin-top: 14px;
  max-width: 62ch;
}

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

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 12px;
  bottom: 16px;
  width: 1px;
  background: linear-gradient(180deg, rgba(198, 161, 92, 0.9) 0%, rgba(198, 161, 92, 0.22) 76%, rgba(198, 161, 92, 0) 100%);
}

.page-about .timeline__item {
  position: relative;
  padding-bottom: clamp(34px, 5vw, 54px);
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 8px;
  width: 13px;
  height: 13px;
  box-sizing: border-box;
  border-radius: 50%;
  border: 1px solid var(--copper);
  background: var(--field);
}

.page-about .timeline__item--now::before {
  border-color: var(--cyan);
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(41, 240, 200, 0.14), 0 0 22px rgba(41, 240, 200, 0.55);
}

.page-about .timeline__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 5.4vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--copper);
}

.page-about .timeline__title {
  margin: 12px 0 0;
  font-size: clamp(19px, 2.5vw, 24px);
  font-weight: 700;
  line-height: 1.36;
  color: var(--ink);
}

.page-about .timeline__text {
  margin: 10px 0 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-dim);
}

/* ---------- 四条服务线 ---------- */
.page-about .service-band {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 0;
}

.page-about .service-band__item {
  position: relative;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .service-band__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--cyan);
  transition: width 0.35s cubic-bezier(0.2, 0.7, 0.3, 1);
}

@media (min-width: 900px) {
  .page-about .service-band {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .service-band__item {
    padding: 32px 26px;
    border-bottom: 0;
    border-left: 1px solid rgba(198, 161, 92, 0.3);
  }

  .page-about .service-band__item:first-child {
    padding-left: 0;
    border-left: 0;
  }

  .page-about .service-band__item:last-child {
    padding-right: 0;
  }
}

@media (hover: hover) {
  .page-about .service-band__item:hover::before {
    width: 100%;
  }

  .page-about .service-band__item:hover .service-band__title {
    color: var(--cyan);
  }

  .page-about .service-band__item:hover .service-band__link::after {
    transform: translateX(4px);
  }
}

.page-about .service-band__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--orange);
}

.page-about .service-band__title {
  margin: 12px 0 0;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.32;
  color: var(--ink);
  transition: color 0.18s ease;
}

.page-about .service-band__text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-dim);
}

.page-about .service-band__more {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-dim);
}

.page-about .service-band__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--cyan);
  text-decoration: none;
}

.page-about .service-band__link::after {
  content: "→";
  transition: transform 0.18s ease;
}

/* ---------- 数据来源 ---------- */
.page-about .about-data__grid {
  display: grid;
  gap: 34px;
}

@media (min-width: 980px) {
  .page-about .about-data__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 60px;
    align-items: start;
  }
}

.page-about .about-data__para {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.86;
  color: var(--ink-dim);
}

.page-about .rhythm {
  margin: 28px 0 0;
  border-top: 1px solid var(--line);
}

.page-about .rhythm__row {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

@media (min-width: 640px) {
  .page-about .rhythm__row {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 22px;
    align-items: baseline;
  }
}

.page-about .rhythm dt {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--copper);
}

.page-about .rhythm dd {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .rhythm dd .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .about-data__media {
  margin: 0;
  border: 1px solid var(--glass-line);
}

/* ---------- 账户与结算 ---------- */
.page-about .stages {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

@media (min-width: 880px) {
  .page-about .stages {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
    align-items: start;
  }

  .page-about .stages > :nth-child(2) {
    margin-top: 34px;
  }

  .page-about .stages > :nth-child(3) {
    margin-top: 68px;
  }
}

.page-about .stage {
  padding: 26px 22px;
  border: 1px solid var(--glass-line);
  background: var(--glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-glass);
}

.page-about .stage__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--copper);
}

.page-about .stage__title {
  margin: 14px 0 0;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.38;
  color: var(--ink);
}

.page-about .stage__text {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--ink-dim);
}

/* ---------- 团队与资质 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 34px;
}

@media (min-width: 980px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 56px;
    align-items: start;
  }
}

.page-about .team-roster {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .team-roster__item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  background: var(--night);
}

.page-about .team-roster__role {
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
}

.page-about .team-roster__count {
  flex: none;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 22px;
  font-weight: 700;
  color: var(--cyan);
  line-height: 1;
}

.page-about .honors {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .honor {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 15px 18px;
  border: 1px solid rgba(198, 161, 92, 0.42);
  background: rgba(198, 161, 92, 0.06);
}

.page-about .honor__year {
  flex: none;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--copper);
}

.page-about .honor__text {
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
}

.page-about .about-team__media {
  margin: 0;
  border: 1px solid var(--glass-line);
}

/* ---------- 服务承诺 ---------- */
.page-about .promise-row {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 26px;
  border-top: 1px solid var(--line);
  padding-top: 30px;
}

@media (min-width: 820px) {
  .page-about .promise-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 40px;
  }
}

.page-about .promise-row__item {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .promise-row__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(30px, 5.2vw, 46px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

.page-about .promise-row__label {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}

.page-about .promise-row__note {
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-dim);
}

.page-about .about-promise__foot {
  margin: 44px 0 0;
  max-width: 74ch;
  padding-left: 18px;
  border-left: 2px solid var(--copper);
  font-size: 15px;
  line-height: 1.86;
  color: var(--ink-dim);
}

/* ---------- 结尾入口 ---------- */
.page-about .about-next__inner {
  display: grid;
  gap: 24px;
  align-items: center;
  padding-block: 8px;
}

@media (min-width: 860px) {
  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 40px;
  }
}

.page-about .about-next__lede {
  margin: 0;
  max-width: 46ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink);
}

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

/* ---------- 窄屏收束 ---------- */
@media (max-width: 479px) {
  .page-about .about-hero__facts {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .about-next__actions .btn {
    flex: 1 1 100%;
    text-align: center;
  }

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

  .page-about .honor {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .service-band__item::before,
  .page-about .service-band__link::after,
  .page-about .service-band__title {
    transition: none;
  }
}