.page-about {
  --about-cut: 26px;
  color: var(--c-ink);
  background: var(--c-paper);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 44px) 0 clamp(48px, 7vw, 96px);
  background:
    linear-gradient(158deg, rgba(214, 239, 231, .68) 0%, rgba(244, 246, 242, 0) 58%),
    var(--c-paper);
}

.page-about .about-hero__texture {
  position: absolute;
  top: -10%;
  right: -14%;
  width: min(880px, 90%);
  height: auto;
  opacity: .16;
  pointer-events: none;
  z-index: 0;
  -webkit-mask-image: radial-gradient(ellipse at 58% 44%, #000 0%, rgba(0, 0, 0, .42) 46%, transparent 74%);
  mask-image: radial-gradient(ellipse at 58% 44%, #000 0%, rgba(0, 0, 0, .42) 46%, transparent 74%);
}

.page-about .about-hero .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 38px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 6vw, 64px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -.01em;
  margin: 12px 0 0;
  max-width: 17ch;
  color: var(--c-ink);
}

.page-about .about-hero .lede {
  margin: 20px 0 0;
  max-width: 44ch;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.88;
  color: rgba(16, 27, 38, .78);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-about .about-hero__stats .stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 16px 20px;
  background: var(--c-paper);
}

.page-about .about-hero__stats .stat:first-child {
  box-shadow: inset 0 3px 0 var(--c-gold);
}

.page-about .stat__num {
  font-size: clamp(22px, 3.2vw, 32px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: .01em;
  color: var(--c-blue);
}

.page-about .stat__label {
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.55;
  color: rgba(16, 27, 38, .66);
}

/* ---------- 发展历程 ---------- */
.page-about .about-road {
  padding-top: clamp(56px, 8vw, 100px);
  padding-bottom: clamp(56px, 8vw, 100px);
  background: var(--c-paper);
}

.page-about .about-road__head {
  max-width: 720px;
  margin-bottom: clamp(32px, 5vw, 56px);
}

.page-about .about-road__intro {
  margin: 14px 0 0;
  font-size: 17px;
  line-height: 1.88;
  color: rgba(16, 27, 38, .76);
}

.page-about .about-road__grid {
  display: grid;
  gap: clamp(32px, 5vw, 60px);
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 4px 0 4px 34px;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-teal) 0%, rgba(15, 138, 117, .28) 70%, rgba(15, 138, 117, 0) 100%);
}

.page-about .timeline__item {
  position: relative;
  padding-bottom: clamp(26px, 3.4vw, 40px);
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-paper);
  border: 3px solid var(--c-teal);
  box-shadow: 0 0 0 4px rgba(15, 138, 117, .1);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .timeline__item:hover::before {
  border-color: var(--c-gold);
  box-shadow: 0 0 0 6px rgba(227, 168, 59, .16);
}

.page-about .timeline__index {
  display: block;
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--c-teal);
  margin-bottom: 4px;
}

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

.page-about .timeline__text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.82;
  color: rgba(16, 27, 38, .74);
}

.page-about .about-road__cards {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-about .road-card {
  padding: 22px 22px 24px;
  border-left: 3px solid var(--c-teal);
  background: var(--c-sand);
}

.page-about .road-card__fig {
  margin: 0 0 8px;
  font-size: 34px;
  font-weight: 600;
  line-height: 1;
  color: var(--c-blue);
  letter-spacing: .01em;
}

.page-about .road-card h3 {
  font-family: var(--font-sans);
  font-size: 16.5px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--c-ink);
}

.page-about .road-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(16, 27, 38, .74);
}

.page-about .road-card__link {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--c-teal);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}

.page-about .road-card__link:hover {
  color: var(--c-blue);
}

.page-about .about-road__figure {
  margin: clamp(36px, 5vw, 60px) 0 0;
}

.page-about .about-road__figure img {
  display: block;
  width: 100%;
  max-width: 900px;
  height: auto;
  object-fit: cover;
}

/* ---------- 团队分工 ---------- */
.page-about .about-team {
  padding-top: clamp(56px, 8vw, 100px);
  padding-bottom: clamp(56px, 8vw, 100px);
}

.page-about .about-team__head {
  max-width: 700px;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .about-team__intro {
  margin: 14px 0 0;
  font-size: 17px;
  line-height: 1.88;
  color: rgba(16, 27, 38, .76);
}

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

.page-about .team-bars {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-bottom: 18px;
}

.page-about .team-bar {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 5px;
  min-width: 0;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-bottom: 4px solid var(--c-mist);
  background: var(--c-paper);
  color: var(--c-ink);
  font-family: var(--font-sans);
  text-align: left;
  cursor: pointer;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .team-bar:hover {
  transform: translateY(-2px);
  border-bottom-color: var(--c-teal);
}

.page-about .team-bar.is-active {
  background: var(--c-blue);
  border-color: var(--c-blue);
  border-bottom-color: var(--c-gold);
  color: var(--c-paper);
}

.page-about .team-bar:focus-visible {
  outline: 3px solid var(--c-gold);
  outline-offset: 3px;
}

.page-about .team-bar__name {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.35;
}

.page-about .team-bar__count {
  font-size: 13px;
  letter-spacing: .06em;
  opacity: .74;
}

.page-about .team-panel {
  padding: 22px 22px 24px;
  background: var(--c-paper);
  border: 1px solid var(--line);
  border-top: 3px solid var(--c-teal);
}

.page-about .team-panel[hidden] {
  display: none;
}

.page-about .team-panel h3 {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--c-blue);
}

.page-about .team-panel p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.86;
  color: rgba(16, 27, 38, .78);
}

.page-about .about-team__figure {
  margin: 0;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 32px), calc(100% - 32px) 100%, 0 100%);
}

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

/* ---------- 资质 ---------- */
.page-about .about-cred {
  padding-top: clamp(56px, 8vw, 100px);
  padding-bottom: clamp(56px, 8vw, 100px);
  background: var(--c-paper);
}

.page-about .about-cred__intro {
  max-width: 660px;
  margin: 14px 0 0;
  font-size: 17px;
  line-height: 1.88;
  color: rgba(16, 27, 38, .76);
}

.page-about .cred-grid {
  list-style: none;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .cred-badge {
  padding: 26px 22px 28px;
  background: var(--c-sand);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, var(--about-cut) 100%, 0 calc(100% - var(--about-cut)));
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .cred-badge:hover {
  transform: translateY(-3px);
  background: var(--c-mint);
}

.page-about .cred-badge__seal {
  display: inline-block;
  margin-bottom: 14px;
  padding: 5px 10px;
  font-size: 12px;
  letter-spacing: .12em;
  background: var(--c-blue);
  color: var(--c-paper);
}

.page-about .cred-badge h3 {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.52;
  margin: 0 0 10px;
  color: var(--c-ink);
}

.page-about .cred-badge p {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(16, 27, 38, .74);
}

/* ---------- 地域 ---------- */
.page-about .about-region {
  position: relative;
  overflow: hidden;
  padding-top: clamp(56px, 8vw, 100px);
  padding-bottom: clamp(56px, 8vw, 100px);
  background: var(--grad-head);
  color: var(--c-paper);
}

.page-about .about-region::after {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -46%;
  width: 640px;
  height: 640px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(227, 168, 59, .2) 0%, rgba(227, 168, 59, 0) 68%);
  pointer-events: none;
}

.page-about .about-region__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 4vw, 52px);
}

.page-about .about-region .eyebrow {
  color: var(--c-gold);
}

.page-about .about-region .section-title {
  color: var(--c-paper);
}

.page-about .about-region__lead p {
  margin: 16px 0 0;
  max-width: 52ch;
  font-size: 17px;
  line-height: 1.92;
  color: rgba(244, 246, 242, .84);
}

.page-about .region-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  background: rgba(244, 246, 242, .2);
  border: 1px solid rgba(244, 246, 242, .22);
}

.page-about .region-stats li {
  display: grid;
  gap: 4px;
  padding: 18px 20px;
  background: rgba(12, 42, 87, .74);
}

.page-about .region-stats__num {
  font-size: clamp(26px, 3vw, 32px);
  font-weight: 600;
  line-height: 1;
  color: var(--c-gold);
  letter-spacing: .01em;
}

.page-about .region-stats__label {
  font-family: var(--font-sans);
  font-size: 13.5px;
  line-height: 1.62;
  color: rgba(244, 246, 242, .82);
}

/* ---------- 旧版入口 ---------- */
.page-about .about-legacy {
  padding-top: clamp(48px, 7vw, 88px);
  padding-bottom: clamp(48px, 7vw, 88px);
  background: var(--c-sand);
}

.page-about .about-legacy__panel {
  max-width: 840px;
  padding: clamp(28px, 4vw, 44px);
  background: var(--c-paper);
  border-left: 6px solid var(--c-brick);
  color: var(--c-ink);
}

.page-about .about-legacy__panel p {
  margin: 16px 0 24px;
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.9;
  color: rgba(16, 27, 38, .78);
}

/* ---------- 长期服务 ---------- */
.page-about .about-service {
  padding-top: clamp(56px, 8vw, 100px);
  padding-bottom: clamp(56px, 8vw, 100px);
  background: var(--c-paper);
}

.page-about .service-list {
  list-style: none;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(18px, 2.5vw, 28px);
}

.page-about .service-item {
  padding: 26px 22px;
  border-top: 3px solid var(--c-teal);
  background: linear-gradient(180deg, rgba(15, 138, 117, .08) 0%, rgba(15, 138, 117, 0) 62%);
}

.page-about .service-item:nth-child(2) {
  border-top-color: var(--c-blue);
  background: linear-gradient(180deg, rgba(18, 60, 122, .09) 0%, rgba(18, 60, 122, 0) 62%);
}

.page-about .service-item:nth-child(3) {
  border-top-color: var(--c-gold);
  background: linear-gradient(180deg, rgba(227, 168, 59, .14) 0%, rgba(227, 168, 59, 0) 62%);
}

.page-about .service-item__num {
  display: block;
  margin-bottom: 12px;
  font-size: 14px;
  letter-spacing: .2em;
  color: var(--c-teal);
}

.page-about .service-item h3 {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  margin: 0 0 10px;
  color: var(--c-ink);
}

.page-about .service-item p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.86;
  color: rgba(16, 27, 38, .76);
}

.page-about .about-service__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(28px, 4vw, 44px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-road__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-road__cards .road-card:first-child {
    grid-column: 1 / 3;
  }

  .page-about .about-road__cards .road-card:nth-child(3) {
    margin-top: 30px;
  }
}

@media (min-width: 760px) {
  .page-about .cred-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .team-bars {
    grid-template-columns: 9fr 8fr 6fr;
    align-items: stretch;
  }
}

@media (min-width: 860px) {
  .page-about .service-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-about .about-region__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: center;
  }
}

@media (min-width: 980px) {
  .page-about .about-road__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: start;
  }
}

@media (max-width: 619px) {
  .page-about .about-hero__texture {
    opacity: .1;
    right: -26%;
  }

  .page-about .about-hero__stats .stat {
    padding: 14px 12px 16px;
  }

  .page-about .timeline {
    padding-left: 28px;
  }

  .page-about .timeline__item::before {
    left: -28px;
    width: 14px;
    height: 14px;
  }

  .page-about .road-card {
    padding: 18px 18px 20px;
  }

  .page-about .about-legacy__panel {
    border-left-width: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-bar,
  .page-about .cred-badge,
  .page-about .timeline__item::before {
    transition: none;
  }

  .page-about .team-bar:hover,
  .page-about .cred-badge:hover {
    transform: none;
  }
}