.page-about {
  background: var(--haiou-white);
  color: var(--ink);
}

.page-about .about-crumb {
  padding-top: clamp(18px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(18px, 3vw, 34px) clamp(52px, 8vw, 100px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -30% auto auto -12%;
  width: 78%;
  height: 130%;
  background: linear-gradient(145deg, var(--pale-teal) 0%, rgba(216, 241, 244, 0) 70%);
  transform: rotate(-12deg);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 4.5vw, 56px);
  align-items: center;
}

.page-about .about-hero__text h1 {
  margin: 12px 0 0;
  font-size: clamp(1.95rem, 7vw, 4.1rem);
  line-height: 1.06;
  font-weight: 900;
  letter-spacing: -0.025em;
  color: var(--deep-sea);
}

.page-about .about-hero__text .lede {
  margin-top: clamp(16px, 2.4vw, 24px);
}

.page-about .about-hero__note {
  margin: clamp(14px, 2vw, 20px) 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--voyage-blue);
  padding-left: 14px;
  border-left: 2px solid var(--hairline-teal);
}

.page-about .about-hero__key {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  margin: clamp(26px, 3.6vw, 42px) 0 0;
  padding: 0;
}

.page-about .about-hero__key > div {
  background: var(--mist-white);
  padding: 14px 16px;
  min-width: 0;
}

.page-about .about-hero__key dt {
  margin: 0 0 6px;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: .05em;
  color: var(--tide-gray);
}

.page-about .about-hero__key dd {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
}

.page-about .about-hero__key dd .mono {
  margin-right: 2px;
  font-size: 22px;
  font-weight: 700;
  color: var(--orange-ink);
}

.page-about .about-hero__media {
  position: relative;
  z-index: 1;
  margin: 0;
}

.page-about .about-hero__media img,
.page-about .about-team__media img,
.page-about .about-region__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  background: linear-gradient(155deg, var(--pale-teal), var(--voyage-blue));
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.page-about .about-hero__media img {
  aspect-ratio: 3 / 2;
}

.page-about .trail-rule {
  height: 3px;
  width: 58%;
  background: linear-gradient(90deg, var(--wave-teal), var(--wing-orange));
}

.page-about .about-hero__caption,
.page-about .about-team__caption,
.page-about .about-region__caption {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--tide-gray);
}

/* ---------- 主张 ---------- */
.page-about .about-claim__grid {
  display: grid;
  gap: clamp(20px, 3vw, 46px);
}

.page-about .about-claim__lead h2 {
  margin-top: 12px;
}

.page-about .about-claim__body p {
  margin: 0 0 1.4em;
  font-size: 16px;
  line-height: 1.85;
}

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

.page-about .claim-quote {
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 4px 0 4px 18px;
  border-left: 3px solid var(--wing-orange);
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  line-height: 1.65;
  font-weight: 600;
  color: var(--deep-sea);
}

/* ---------- 时间线 ---------- */
.page-about .about-track__head h2 {
  margin-top: 12px;
}

.page-about .timeline {
  list-style: none;
  margin: clamp(28px, 4vw, 52px) 0 0;
  padding: 0;
}

.page-about .tl-item {
  display: grid;
  gap: 10px;
  padding-block: clamp(20px, 3vw, 34px);
  border-top: 1px solid var(--hairline);
}

.page-about .tl-item:last-child {
  border-bottom: 1px solid var(--hairline);
}

.page-about .tl-mark {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .tl-num {
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--deep-sea);
  letter-spacing: .02em;
}

.page-about .tl-stage {
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--voyage-blue);
}

.page-about .tl-body h3 {
  margin: 0 0 8px;
  font-size: clamp(1.05rem, 2.5vw, 1.35rem);
  line-height: 1.35;
  font-weight: 700;
  color: var(--deep-sea);
}

.page-about .tl-body p {
  margin: 0 0 8px;
  font-size: 16px;
  line-height: 1.8;
}

.page-about .tl-body p:last-child {
  margin-bottom: 0;
}

.page-about .tl-body .tl-more {
  font-size: 15px;
  line-height: 1.75;
  color: var(--voyage-blue);
  padding-left: 14px;
  border-left: 2px solid var(--hairline-teal);
}

/* ---------- 团队 ---------- */
.page-about .about-team__head {
  max-width: 64ch;
}

.page-about .about-team__head h2 {
  margin-top: 12px;
}

.page-about .about-team__head .lede {
  margin-top: clamp(14px, 2vw, 20px);
}

.page-about .about-team__body {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .team-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(124, 150, 168, .3);
  border: 1px solid rgba(124, 150, 168, .3);
}

.page-about .team-stat {
  --w: 0%;
  background: var(--voyage-blue);
  padding: clamp(18px, 2.6vw, 28px);
  transition: background .28s var(--ease), transform .28s var(--ease);
}

.page-about .team-stat--eng { --w: 53%; }
.page-about .team-stat--ops { --w: 23%; }
.page-about .team-stat--all { --w: 100%; }

.page-about .team-stat:hover,
.page-about .team-stat:focus-within {
  background: var(--deep-sea);
  transform: translateX(6px);
}

.page-about .team-stat__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--wave-teal);
}

.page-about .team-stat__num {
  display: block;
  margin: 10px 0 10px;
  font-size: clamp(2.2rem, 6vw, 3.1rem);
  line-height: 1;
  font-weight: 700;
  color: var(--haiou-white);
}

.page-about .team-stat__num span {
  margin-left: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--tide-gray);
}

.page-about .team-stat__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(247, 250, 252, .84);
}

.page-about .team-stat__bar {
  display: block;
  height: 6px;
  margin-top: 18px;
  background: rgba(247, 250, 252, .16);
  overflow: hidden;
}

.page-about .team-stat__bar i {
  display: block;
  height: 100%;
  width: var(--w);
  background: var(--wave-teal);
  opacity: .5;
  transition: opacity .3s var(--ease), background .3s var(--ease);
}

.page-about .team-stat:hover .team-stat__bar i,
.page-about .team-stat:focus-within .team-stat__bar i {
  opacity: 1;
  background: var(--wing-orange);
}

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

.page-about .about-team__media img {
  aspect-ratio: 8 / 5;
}

/* ---------- 服务地区 ---------- */
.page-about .about-region__head {
  max-width: 68ch;
}

.page-about .about-region__head h2 {
  margin-top: 12px;
}

.page-about .about-region__head .lede {
  margin-top: clamp(14px, 2vw, 20px);
}

.page-about .about-region__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .city-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .city-chip {
  display: inline-block;
  padding: 8px 14px;
  background: var(--mist-white);
  border: 1px solid var(--hairline);
  font-size: 14px;
  letter-spacing: .05em;
  color: var(--deep-sea);
  cursor: default;
  transition: background .22s var(--ease), border-color .22s var(--ease),
              color .22s var(--ease), transform .22s var(--ease);
}

.page-about .city-chip:hover,
.page-about .city-chip:focus-visible {
  background: var(--wing-orange);
  border-color: var(--wing-orange);
  color: var(--ink);
  transform: translateY(-3px);
  outline: none;
}

.page-about .about-region__note {
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--voyage-blue);
  padding-left: 14px;
  border-left: 2px solid var(--hairline-teal);
}

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

.page-about .about-region__media img {
  aspect-ratio: 9 / 7;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners__head {
  max-width: 64ch;
}

.page-about .about-partners__head h2 {
  margin-top: 12px;
}

.page-about .about-partners__head .lede {
  margin-top: clamp(14px, 2vw, 20px);
}

.page-about .about-partners__grid {
  margin-top: clamp(26px, 4vw, 46px);
}

.page-about .partner-card {
  padding: clamp(20px, 2.8vw, 30px);
  background: var(--mist-white);
  border: 1px solid var(--hairline);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
  transition: border-color .26s var(--ease), transform .26s var(--ease), background .26s var(--ease);
}

.page-about .partner-card:hover,
.page-about .partner-card:focus-within {
  border-color: var(--wave-teal);
  background: var(--pale-teal);
  transform: translateY(-5px);
}

.page-about .partner-card__num {
  margin: 0;
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--wave-teal);
}

.page-about .partner-card h3 {
  margin: 12px 0 10px;
  font-size: clamp(1.05rem, 2.4vw, 1.25rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--deep-sea);
}

.page-about .partner-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 收束 ---------- */
.page-about .about-cta__inner {
  position: relative;
  overflow: hidden;
  padding: clamp(30px, 5vw, 62px);
  background: linear-gradient(128deg, var(--deep-sea) 0%, var(--voyage-blue) 100%);
  color: var(--haiou-white);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.page-about .about-cta__inner::before {
  content: "";
  position: absolute;
  right: -18%;
  bottom: -45%;
  width: 62%;
  height: 170%;
  background: radial-gradient(circle at 70% 30%, rgba(31, 182, 193, .38), transparent 62%);
  transform: rotate(-12deg);
  pointer-events: none;
}

.page-about .about-cta__inner > * {
  position: relative;
  z-index: 1;
}

.page-about .about-cta__eyebrow {
  color: var(--wave-teal);
}

.page-about .about-cta__inner h2 {
  margin: 12px 0 0;
  font-size: clamp(1.5rem, 4.4vw, 2.6rem);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--haiou-white);
}

.page-about .about-cta__inner > p {
  max-width: 60ch;
  margin: clamp(14px, 2vw, 20px) 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(247, 250, 252, .84);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-cta__actions .btn--ghost {
  border-color: rgba(247, 250, 252, .5);
  color: var(--haiou-white);
}

.page-about .about-cta__actions .btn--ghost:hover {
  border-color: var(--wing-orange);
  color: var(--wing-orange);
}

.page-about .about-cta__contact {
  font-size: 14px;
  letter-spacing: .02em;
  color: rgba(247, 250, 252, .76);
}

.page-about .about-cta__contact .mono {
  color: var(--haiou-white);
}

.page-about .about-cta__aside {
  font-size: 14px;
  color: rgba(247, 250, 252, .7);
}

.page-about .about-cta__aside a {
  color: var(--wave-teal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-cta__aside a:hover {
  color: var(--wing-orange);
}

/* ---------- 响应式 ---------- */
@media (min-width: 820px) {
  .page-about .tl-item {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 0 40px;
    align-items: start;
  }

  .page-about .tl-mark {
    flex-direction: column;
    gap: 6px;
    position: relative;
    padding-left: 20px;
  }

  .page-about .tl-mark::before {
    content: "";
    position: absolute;
    left: 0;
    top: .62em;
    width: 16px;
    height: 3px;
    background: var(--wing-orange);
    transition: width .3s var(--ease);
  }

  .page-about .tl-item:hover .tl-mark::before,
  .page-about .tl-item:focus-within .tl-mark::before {
    width: 28px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  }

  .page-about .about-claim__grid {
    grid-template-columns: minmax(0, .74fr) minmax(0, 1.26fr);
    align-items: start;
  }

  .page-about .about-team__body {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    align-items: start;
  }

  .page-about .about-region__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .84fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding-block: clamp(22px, 3vw, 40px) clamp(64px, 8vw, 112px);
  }

  .page-about .about-hero__key {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* 悬停设备才折叠时间线补充说明，触屏上内容始终可见 */
@media (hover: hover) and (min-width: 820px) {
  .page-about .tl-body .tl-more {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0;
    transition: max-height .38s var(--ease), opacity .3s var(--ease), margin-top .38s var(--ease);
  }

  .page-about .tl-item:hover .tl-more,
  .page-about .tl-item:focus-within .tl-more {
    max-height: 9rem;
    opacity: 1;
    margin-top: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-stat,
  .page-about .team-stat__bar i,
  .page-about .partner-card,
  .page-about .city-chip,
  .page-about .tl-mark::before {
    transition: none;
  }
}