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

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: clamp(18px, 3vw, 30px);
  font-size: 13px;
  color: var(--gray-green);
}

.page-about .breadcrumb a {
  color: var(--pale-gold);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--sand-gold);
  border-bottom-color: var(--line-gold-strong);
}

.page-about .section--light {
  background: var(--warm-sand);
  color: var(--charcoal);
}

.page-about .section--light .eyebrow {
  color: var(--turf-green);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(30px, 5vw, 64px) 0 clamp(52px, 8vw, 104px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -10% -20% auto auto;
  width: min(560px, 62vw);
  aspect-ratio: 1;
  background: radial-gradient(circle at 62% 38%, rgba(31, 111, 92, .42), transparent 66%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 66px);
  align-items: start;
}

.page-about .about-hero__main h1 {
  margin: 18px 0 0;
  font-size: clamp(31px, 7.4vw, 62px);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.page-about .about-hero__lede {
  margin: 22px 0 0;
  max-width: 54ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.9;
  color: var(--pale-gold);
}

.page-about .about-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__aside {
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--line-gold);
  border-radius: 18px 5px 20px 7px;
  background: linear-gradient(165deg, rgba(31, 111, 92, .34), rgba(8, 32, 29, .55));
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 14px 16px;
  border: 1px solid rgba(216, 178, 106, .2);
  border-radius: 12px 4px 14px 6px;
  background: rgba(8, 32, 29, .34);
}

.page-about .about-num {
  font-size: clamp(21px, 3vw, 27px);
  font-weight: 700;
  color: var(--sand-gold);
  letter-spacing: -0.01em;
}

.page-about .about-lbl {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--gray-green);
}

/* ---------- 起点 ---------- */

.page-about .origin-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 48px);
}

.page-about .origin-year {
  display: flex;
  align-items: baseline;
  gap: 16px;
}

.page-about .origin-year__num {
  font-size: clamp(44px, 9vw, 78px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: transparent;
  -webkit-text-stroke: 1.4px var(--sand-gold);
  text-stroke: 1.4px var(--sand-gold);
}

.page-about .origin-body h2 {
  margin: 0 0 18px;
  font-size: clamp(23px, 3.6vw, 36px);
  line-height: 1.28;
  letter-spacing: -0.01em;
}

.page-about .origin-body p {
  margin: 0 0 15px;
  max-width: 62ch;
  font-size: clamp(15px, 1.7vw, 16.5px);
  line-height: 1.9;
  color: rgba(244, 247, 245, .82);
}

.page-about .origin-body p:last-child {
  margin-bottom: 0;
  color: var(--pale-gold);
  border-left: 2px solid var(--sand-gold);
  padding-left: 16px;
}

/* ---------- 时间线 ---------- */

.page-about .about-head {
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .about-head h2 {
  margin: 12px 0 0;
  font-size: clamp(24px, 4vw, 40px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  max-width: 26ch;
}

.page-about .about-head__lede {
  margin: 16px 0 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--gray-green);
}

.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
}

.page-about .tl__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

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

.page-about .tl__yearnum {
  font-size: clamp(17px, 2.2vw, 20px);
  font-weight: 700;
  color: var(--sand-gold);
}

.page-about .tl__phase {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gray-green);
  border: 1px solid rgba(124, 143, 136, .42);
  border-radius: 999px;
  padding: 2px 9px;
}

.page-about .tl__card {
  border: 1px solid var(--line-gold);
  border-radius: 14px 6px 16px 8px;
  background: linear-gradient(165deg, rgba(31, 111, 92, .26), rgba(8, 32, 29, .52));
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .tl__card:hover {
  border-color: var(--line-gold-strong);
  transform: translateY(-2px);
}

.page-about .tl__card[open] {
  border-color: var(--line-gold-strong);
}

.page-about .tl__summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px clamp(16px, 2.4vw, 24px);
}

.page-about .tl__summary::-webkit-details-marker {
  display: none;
}

.page-about .tl__summary:focus-visible {
  outline: 2px solid var(--sand-gold);
  outline-offset: 3px;
  border-radius: 12px;
}

.page-about .tl__title {
  font-size: clamp(16px, 2.1vw, 19px);
  font-weight: 700;
  line-height: 1.5;
}

.page-about .tl__cue {
  position: relative;
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  border: 1px solid var(--sand-gold);
  border-radius: 50%;
  transition: background-color var(--dur) var(--ease);
}

.page-about .tl__cue::before,
.page-about .tl__cue::after {
  content: "";
  position: absolute;
  left: 6px;
  right: 6px;
  top: 50%;
  height: 1.5px;
  background: var(--sand-gold);
  transition: opacity var(--dur) var(--ease);
}

.page-about .tl__cue::after {
  transform: rotate(90deg);
}

.page-about .tl__card[open] .tl__cue::after {
  opacity: 0;
}

.page-about .tl__detail {
  padding: 0 clamp(16px, 2.4vw, 24px) 20px;
  border-top: 1px solid rgba(216, 178, 106, .18);
  margin-top: -2px;
  padding-top: 16px;
}

.page-about .tl__detail p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.9;
  color: rgba(244, 247, 245, .84);
  max-width: 62ch;
}

.page-about .tl__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .tl__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--gray-green);
}

.page-about .tl__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .82em;
  width: 9px;
  height: 1.5px;
  background: var(--sand-gold);
}

/* ---------- 演进折线 ---------- */

.page-about .about-evolve {
  padding: clamp(10px, 2vw, 26px) 0 clamp(40px, 7vw, 84px);
}

.page-about .evolve {
  margin: 0;
  padding: clamp(20px, 3vw, 34px) clamp(14px, 2.4vw, 30px) clamp(16px, 2.4vw, 26px);
  border: 1px solid var(--line-gold);
  border-radius: 20px 6px 22px 8px;
  background: linear-gradient(150deg, rgba(8, 32, 29, .68), rgba(31, 111, 92, .2));
}

.page-about .evolve__svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.page-about .evolve__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: clamp(14px, 2vw, 22px);
  padding-top: 16px;
  border-top: 1px solid rgba(216, 178, 106, .18);
}

.page-about .evolve__key {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--gray-green);
}

.page-about .evolve__key i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 2px solid var(--sand-gold);
  background: var(--ink-green);
}

.page-about .evolve__key--now {
  color: var(--amber);
}

.page-about .evolve__key--now i {
  border-color: var(--amber);
  background: var(--amber);
}

/* ---------- 夜景图 ---------- */

.page-about .about-night {
  padding-bottom: clamp(44px, 7vw, 92px);
}

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

.page-about .about-night .media__caption {
  color: var(--gray-green);
}

/* ---------- 团队 ---------- */

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4.5vw, 56px);
  align-items: start;
}

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

.page-about .about-team__body h2 {
  margin: 12px 0 16px;
  font-size: clamp(23px, 3.6vw, 36px);
  line-height: 1.26;
  letter-spacing: -0.01em;
  max-width: 24ch;
}

.page-about .about-team__body > p {
  margin: 0;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(18, 24, 26, .78);
}

.page-about .role-list {
  margin-top: clamp(20px, 3vw, 30px);
  display: grid;
  gap: 10px;
}

.page-about .role {
  border: 1px solid rgba(18, 24, 26, .14);
  border-radius: 12px 5px 14px 6px;
  background: rgba(255, 255, 255, .58);
  transition: border-color var(--dur) var(--ease);
}

.page-about .role[open] {
  border-color: rgba(31, 111, 92, .48);
}

.page-about .role__summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 18px;
}

.page-about .role__summary::-webkit-details-marker {
  display: none;
}

.page-about .role__summary:focus-visible {
  outline: 2px solid var(--turf-green);
  outline-offset: 2px;
  border-radius: 12px;
}

.page-about .role__name {
  font-size: 16.5px;
  font-weight: 700;
}

.page-about .role__meta {
  font-size: 13px;
  color: var(--turf-green);
  border: 1px solid rgba(31, 111, 92, .42);
  border-radius: 999px;
  padding: 2px 10px;
}

.page-about .role__body {
  padding: 0 18px 16px;
  border-top: 1px solid rgba(18, 24, 26, .1);
  padding-top: 14px;
  margin-top: -2px;
}

.page-about .role__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(18, 24, 26, .74);
}

/* ---------- 流程 ---------- */

.page-about .about-flow {
  background: linear-gradient(180deg, rgba(8, 32, 29, .84), rgba(31, 111, 92, .16));
  margin-top: 0;
}

.page-about .flow-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 50px);
  align-items: start;
}

.page-about .flow-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(14px, 2vw, 20px);
}

.page-about .flow-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(216, 178, 106, .18);
}

.page-about .flow-step:first-child {
  border-top: 1px solid rgba(216, 178, 106, .18);
}

.page-about .flow-step__num {
  font-size: 20px;
  font-weight: 700;
  color: var(--sand-gold);
  letter-spacing: -0.02em;
}

.page-about .flow-step__text h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
}

.page-about .flow-step__text p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(244, 247, 245, .78);
}

.page-about .flow-fig {
  margin: 0;
}

.page-about .flow-fig .media__caption {
  color: var(--gray-green);
}

/* ---------- 合作与荣誉 ---------- */

.page-about .partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2.2vw, 24px);
}

.page-about .partner-card {
  padding: clamp(20px, 2.8vw, 30px);
  border: 1px solid var(--line-gold);
  border-radius: 16px 5px 18px 7px;
  background: linear-gradient(165deg, rgba(31, 111, 92, .22), rgba(8, 32, 29, .5));
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .partner-card:hover,
.page-about .partner-card:focus-within {
  border-color: var(--line-gold-strong);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px -22px rgba(216, 178, 106, .8);
}

.page-about .partner-card__num {
  display: block;
  font-size: 26px;
  font-weight: 700;
  color: var(--sand-gold);
  letter-spacing: -0.02em;
}

.page-about .partner-card h3 {
  margin: 12px 0 10px;
  font-size: 18px;
  font-weight: 700;
}

.page-about .partner-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(244, 247, 245, .8);
}

.page-about .partner-card--honor {
  border-color: rgba(228, 130, 58, .44);
  background: linear-gradient(165deg, rgba(228, 130, 58, .16), rgba(8, 32, 29, .5));
}

.page-about .partner-card--honor .partner-card__num {
  color: var(--amber);
}

.page-about .partner-card__note {
  margin-top: 12px !important;
  padding-top: 12px;
  border-top: 1px solid rgba(216, 178, 106, .22);
  font-size: 12.5px !important;
  color: var(--gray-green) !important;
}

/* ---------- 服务范围与对接 ---------- */

.page-about .service-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-about .service-body h2 {
  margin: 12px 0 16px;
  font-size: clamp(23px, 3.6vw, 36px);
  line-height: 1.26;
  letter-spacing: -0.01em;
  max-width: 22ch;
}

.page-about .service-body > p {
  margin: 0 0 14px;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(18, 24, 26, .78);
}

.page-about .service-list {
  list-style: none;
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  padding: 0;
  border-top: 1px solid rgba(18, 24, 26, .16);
}

.page-about .service-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 18px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(18, 24, 26, .12);
}

.page-about .service-list__k {
  font-size: 13.5px;
  color: rgba(18, 24, 26, .6);
}

.page-about .service-list__v {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--charcoal);
}

.page-about .service-card {
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid rgba(31, 111, 92, .36);
  border-radius: 18px 6px 20px 8px;
  background: linear-gradient(160deg, rgba(31, 111, 92, .16), rgba(246, 241, 230, .9));
}

.page-about .service-card .eyebrow {
  color: var(--turf-green);
}

.page-about .service-contact {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .service-contact li {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--charcoal);
  word-break: break-word;
}

.page-about .service-contact li.mono {
  font-size: 13.5px;
  color: rgba(18, 24, 26, .72);
}

.page-about .service-contact a {
  color: var(--charcoal);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 111, 92, .42);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .service-contact a:hover,
.page-about .service-contact a:focus-visible {
  color: var(--turf-green);
  border-bottom-color: var(--turf-green);
}

.page-about .service-card__note {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid rgba(18, 24, 26, .14);
  font-size: 13.5px;
  line-height: 1.85;
  color: rgba(18, 24, 26, .68);
}

.page-about .service-card__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.page-about .service-card .btn--ghost {
  color: var(--charcoal);
  border-color: rgba(18, 24, 26, .32);
}

.page-about .service-card .btn--ghost:hover,
.page-about .service-card .btn--ghost:focus-visible {
  border-color: var(--turf-green);
  color: var(--turf-green);
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-about .partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .partner-card--honor {
    grid-column: 1 / -1;
  }
}

@media (min-width: 820px) {
  .page-about .origin-grid {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .origin-year {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .page-about .tl__item {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }

  .page-about .tl__year {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding-top: 20px;
  }

  .page-about .about-origin .eyebrow--vertical {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
  }
}

@media (min-width: 920px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .85fr);
    gap: clamp(36px, 5vw, 72px);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    gap: clamp(30px, 4.5vw, 64px);
  }

  .page-about .flow-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: clamp(30px, 4vw, 56px);
  }

  .page-about .service-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: clamp(30px, 4vw, 58px);
  }

  .page-about .partner-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .partner-card--honor {
    grid-column: auto;
  }
}

@media (min-width: 1080px) {
  .page-about .about-hero {
    padding-top: clamp(40px, 5vw, 72px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl__card,
  .page-about .partner-card,
  .page-about .tl__cue,
  .page-about .tl__cue::after,
  .page-about .service-contact a,
  .page-about .breadcrumb a {
    transition: none;
  }

  .page-about .tl__card:hover,
  .page-about .partner-card:hover,
  .page-about .partner-card:focus-within {
    transform: none;
  }
}