.page-about {
  --about-rule: rgba(143, 166, 184, .2);
  --about-rule-soft: rgba(143, 166, 184, .1);
  --about-axis: 132px;
  padding-bottom: clamp(40px, 7vw, 88px);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-top: clamp(16px, 2.6vw, 26px);
}

/* ---------- 页头 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(26px, 4.6vw, 56px) 0 clamp(32px, 5vw, 64px);
}

.page-about .about-hero__wave {
  position: absolute;
  right: -10%;
  bottom: 4%;
  width: min(1180px, 128%);
  height: clamp(170px, 24vw, 300px);
  opacity: .85;
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  align-items: end;
}

.page-about .about-hero__lead {
  max-width: 62ch;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(29px, 5.2vw, 52px);
  font-weight: 600;
  line-height: 1.16;
  letter-spacing: .01em;
  color: var(--text);
  margin: 14px 0 0;
}

.page-about .about-hero .lede {
  margin-top: 18px;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--text);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--about-rule-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 14px 34px;
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-about .about-hero__facts .mono {
  font-size: clamp(20px, 2.4vw, 26px);
  color: var(--cyan);
}

.page-about .about-hero__facts li span:last-child {
  font-family: var(--font-label);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--mist);
}

.page-about .about-hero__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--console);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

/* ---------- 品牌主张 ---------- */
.page-about .about-credo {
  position: relative;
  background: var(--cream);
  color: var(--ink);
  border-radius: var(--radius);
  padding: clamp(26px, 4vw, 58px);
  box-shadow: var(--shadow);
}

.page-about .about-credo::after {
  content: "";
  position: absolute;
  left: clamp(26px, 4vw, 58px);
  right: clamp(26px, 4vw, 58px);
  bottom: clamp(14px, 2vw, 24px);
  height: 1px;
  background: linear-gradient(90deg, rgba(18, 226, 207, .75), rgba(255, 107, 69, .65));
  opacity: .6;
}

.page-about .about-credo__label {
  font-family: var(--font-label);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .14em;
  color: #0A6E64;
  margin: 0;
}

.page-about .about-credo__title {
  font-family: var(--font-display);
  font-size: clamp(24px, 3.4vw, 38px);
  font-weight: 600;
  line-height: 1.22;
  color: var(--ink);
  margin: 12px 0 0;
}

.page-about .about-credo__cols {
  margin-top: 22px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px 34px;
}

.page-about .about-credo__cols p {
  margin: 0;
  font-size: 17px;
  line-height: 1.85;
  color: #2C2622;
}

.page-about .about-credo__marks {
  list-style: none;
  margin: 26px 0 clamp(18px, 2.4vw, 30px);
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-credo__marks li {
  font-family: var(--font-label);
  font-size: 14px;
  letter-spacing: .06em;
  padding: 6px 13px;
  border: 1px solid rgba(20, 17, 16, .22);
  border-radius: 999px;
  color: #3A332E;
}

/* ---------- 团队构成 ---------- */
.page-about .about-team__intro {
  margin: 14px 0 0;
  max-width: 64ch;
  line-height: 1.85;
  color: var(--text);
}

.page-about .team-band {
  margin: clamp(26px, 4vw, 44px) 0 0;
  display: flex;
  gap: 3px;
  height: 88px;
}

.page-about .team-band__seg {
  flex: 1 1 0;
  min-width: 0;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 3px;
  padding: 10px 12px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
}

.page-about .team-band__seg--data { flex-grow: 18; }
.page-about .team-band__seg--editor { flex-grow: 24; }
.page-about .team-band__seg--version { flex-grow: 9; }
.page-about .team-band__seg--support { flex-grow: 11; }

.page-about .team-band__seg::before {
  content: "";
  position: absolute;
  inset: 0;
}

.page-about .team-band__seg--data::before {
  background: linear-gradient(180deg, rgba(18, 226, 207, .38), rgba(18, 226, 207, .05));
}

.page-about .team-band__seg--editor::before {
  background: linear-gradient(180deg, rgba(255, 107, 69, .4), rgba(255, 107, 69, .05));
}

.page-about .team-band__seg--version::before {
  background: linear-gradient(180deg, rgba(124, 106, 168, .48), rgba(124, 106, 168, .07));
}

.page-about .team-band__seg--support::before {
  background: linear-gradient(180deg, rgba(255, 194, 75, .4), rgba(255, 194, 75, .06));
}

.page-about .team-band__num {
  position: relative;
  font-family: var(--font-data);
  font-size: clamp(16px, 2vw, 24px);
  font-weight: 500;
  line-height: 1;
  color: var(--text);
}

.page-about .team-band__name {
  position: relative;
  font-family: var(--font-label);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.page-about .about-team__tabs {
  margin-top: clamp(30px, 4.5vw, 50px);
}

.page-about .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--about-rule-soft);
}

.page-about .tabs__tab {
  font-family: var(--font-label);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .05em;
  color: var(--mist);
  background: transparent;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  padding: 8px 16px;
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .tabs__tab:hover {
  color: var(--text);
  border-color: var(--line);
  transform: translateY(-1px);
}

.page-about .tabs__tab:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .tabs__tab[aria-selected="true"] {
  color: var(--sea-900);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .tabs__panel {
  padding-top: clamp(20px, 3vw, 30px);
  max-width: 78ch;
}

.page-about .tabs__panel h3 {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 600;
  color: var(--text);
  margin: 0 0 12px;
}

.page-about .tabs__panel p {
  margin: 0 0 12px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--text);
}

.page-about .about-team__note {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--cyan);
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  list-style: none;
  margin: clamp(30px, 4vw, 48px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, rgba(18, 226, 207, .55), rgba(255, 107, 69, .38), rgba(143, 166, 184, .12));
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 36px 34px;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 6px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--sea-900);
  border: 1px solid var(--line-cyan);
  box-shadow: 0 0 0 4px rgba(18, 226, 207, .08);
}

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

.page-about .timeline__year {
  font-family: var(--font-data);
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 500;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -.01em;
}

.page-about .timeline__title {
  font-family: var(--font-display);
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 600;
  line-height: 1.32;
  color: var(--text);
  margin: 10px 0 10px;
}

.page-about .timeline__body p {
  margin: 0;
  max-width: 64ch;
  line-height: 1.85;
  color: var(--text);
}

.page-about .timeline__figure {
  margin: 20px 0 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--console);
}

.page-about .timeline__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 9 / 5;
}

/* ---------- 维护节奏 ---------- */
.page-about .rhythm {
  margin-top: clamp(26px, 4vw, 42px);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 32px);
}

.page-about .rhythm__lead {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(158deg, var(--console), var(--card));
  padding: clamp(22px, 3vw, 34px);
  box-shadow: var(--shadow);
}

.page-about .rhythm__num {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(46px, 7vw, 72px);
  font-weight: 500;
  line-height: 1;
  color: var(--cyan);
}

.page-about .rhythm__unit {
  display: block;
  margin-top: 10px;
  font-family: var(--font-label);
  font-size: 14px;
  letter-spacing: .12em;
  color: var(--mist);
}

.page-about .rhythm__lead p {
  margin: 18px 0 0;
  line-height: 1.85;
  color: var(--text);
}

.page-about .rhythm__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-rule-soft);
  border: 1px solid var(--about-rule-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .rhythm__item {
  padding: 20px 22px;
  display: grid;
  gap: 8px;
  background: var(--sea-900);
}

.page-about .rhythm__item h3 {
  font-family: var(--font-label);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--coral);
  margin: 0;
}

.page-about .rhythm__item p {
  margin: 0;
  line-height: 1.8;
  color: var(--text);
}

/* ---------- 服务区域 ---------- */
.page-about .region {
  margin-top: clamp(26px, 4vw, 42px);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.5vw, 46px);
  align-items: start;
}

.page-about .region__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--console);
  box-shadow: var(--shadow);
}

.page-about .region__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.page-about .region__hint {
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 14px;
  padding: 10px 14px;
  background: rgba(11, 26, 38, .88);
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

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

.page-about .region__row {
  padding: 15px 0;
  border-bottom: 1px solid var(--about-rule-soft);
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
}

.page-about .region__row:first-child {
  padding-top: 0;
}

.page-about .region__row dt {
  font-family: var(--font-label);
  font-size: 14px;
  letter-spacing: .09em;
  color: var(--mist);
}

.page-about .region__row dd {
  margin: 0;
  line-height: 1.75;
  color: var(--text);
}

.page-about .region__row dd .mono {
  color: var(--cyan);
  font-size: 16px;
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  border-top: 1px solid var(--about-rule-soft);
  padding-top: clamp(26px, 4vw, 44px);
}

.page-about .about-next__title {
  font-family: var(--font-display);
  font-size: clamp(22px, 2.8vw, 30px);
  font-weight: 600;
  color: var(--text);
  margin: 0 0 12px;
}

.page-about .about-next__text {
  margin: 0;
  max-width: 68ch;
  line-height: 1.85;
  color: var(--text);
}

.page-about .about-next__links {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .region__row {
    grid-template-columns: var(--about-axis) 1fr;
    gap: 16px;
    align-items: baseline;
  }
}

@media (min-width: 760px) {
  .page-about .timeline::before {
    left: 17px;
  }

  .page-about .timeline__item {
    display: grid;
    grid-template-columns: var(--about-axis) minmax(0, 1fr);
    gap: 8px 28px;
    align-items: start;
    padding: 0 0 40px 46px;
  }

  .page-about .timeline__item::before {
    left: 11px;
    top: 12px;
  }

  .page-about .timeline__year {
    padding-top: 2px;
  }

  .page-about .timeline__title {
    margin-top: 0;
  }
}

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    grid-template-columns: 5fr 7fr;
  }

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

  .page-about .rhythm {
    grid-template-columns: 4fr 8fr;
    align-items: start;
  }

  .page-about .region {
    grid-template-columns: 7fr 5fr;
    align-items: center;
  }
}

@media (hover: hover) and (min-width: 880px) {
  .page-about .region__hint {
    opacity: 0;
    transform: translateY(6px);
  }

  .page-about .region__figure:hover .region__hint,
  .page-about .region__figure:focus-within .region__hint {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 619px) {
  .page-about .team-band {
    height: 66px;
  }

  .page-about .team-band__name {
    display: none;
  }

  .page-about .about-hero__facts {
    gap: 12px 24px;
  }
}

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