.page-about {
  --about-line: rgba(94, 156, 139, .34);
  --about-line-soft: rgba(94, 156, 139, .18);
  --about-ink-soft: rgba(244, 239, 226, .66);
  background: var(--paper);
  color: var(--ink);
  overflow-x: clip;
}

/* ---------- 面包屑条 ---------- */
.page-about .about-crumb-bar {
  background: var(--paper);
  border-bottom: 1px solid var(--about-line-soft);
  padding: 14px 0;
}

.page-about .about-crumb-bar__sep {
  margin: 0 10px;
  color: var(--slate);
}

.page-about .about-crumb-bar .breadcrumbs__item--current {
  color: var(--ink);
  font-weight: 700;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background:
    radial-gradient(130% 100% at 88% 6%, rgba(108, 196, 214, .22), transparent 62%),
    linear-gradient(158deg, var(--ink) 0%, var(--deep) 58%, #0d3358 100%);
  color: var(--paper);
  padding: clamp(46px, 7vw, 96px) 0 clamp(78px, 9vw, 132px);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: clamp(38px, 5vw, 68px);
  background: var(--paper);
  clip-path: polygon(0 100%, 100% 38%, 100% 100%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(30px, 5vw, 56px);
  align-items: end;
}

.page-about .about-hero__mark {
  position: absolute;
  left: 14px;
  top: 14%;
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .34em;
  color: rgba(244, 239, 226, .42);
  pointer-events: none;
}

.page-about .about-hero__title {
  margin: 14px 0 20px;
  font-size: var(--h1);
  font-weight: 900;
  line-height: 1.03;
  letter-spacing: -.02em;
}

.page-about .about-hero__title-accent {
  display: inline-block;
  color: var(--data);
}

.page-about .about-hero__lead {
  max-width: 54ch;
  margin: 0;
  font-size: var(--step-1);
  line-height: 1.78;
  color: rgba(244, 239, 226, .84);
}

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

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 22px;
  margin-top: clamp(30px, 4vw, 46px);
  padding-top: 24px;
  border-top: 1px solid rgba(244, 239, 226, .2);
}

.page-about .about-stat {
  display: block;
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--data);
}

.page-about .about-stat__num small {
  font-size: .48em;
  margin-left: 3px;
  color: rgba(244, 239, 226, .7);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--about-ink-soft);
}

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

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-about .about-hero__figcaption {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--about-ink-soft);
}

/* ---------- 通用区块 ---------- */
.page-about .about-block {
  padding: clamp(54px, 7.5vw, 106px) 0;
  position: relative;
}

.page-about .about-block--tinted {
  background: linear-gradient(180deg, rgba(216, 229, 225, .5), rgba(216, 229, 225, .16));
  border-top: 1px solid var(--about-line-soft);
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .about-block--dark {
  background:
    radial-gradient(110% 90% at 12% 0%, rgba(94, 156, 139, .26), transparent 58%),
    linear-gradient(150deg, var(--ink), var(--deep) 78%);
  color: var(--paper);
}

.page-about .about-block__head {
  max-width: 76ch;
  margin-bottom: clamp(30px, 4vw, 52px);
}

.page-about .about-block__title {
  margin: 14px 0 16px;
  font-size: var(--h2);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -.015em;
  color: var(--ink);
}

.page-about .about-block__title--on-dark {
  color: var(--paper);
}

.page-about .about-block__lead {
  margin: 0;
  font-size: var(--step-1);
  line-height: 1.78;
  color: var(--slate);
}

.page-about .about-block--dark .about-block__lead {
  color: rgba(244, 239, 226, .8);
}

/* ---------- 服务半径 ---------- */
.page-about .about-coords {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  align-items: center;
}

.page-about .about-coords__text p {
  margin: 0 0 18px;
  font-size: var(--step-1);
  line-height: 1.82;
  color: #22323d;
}

.page-about .about-coords__list {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-line);
}

.page-about .about-coords__list li {
  position: relative;
  padding: 14px 0 14px 26px;
  border-bottom: 1px solid var(--about-line-soft);
  font-size: 15px;
  line-height: 1.66;
  color: #22323d;
}

.page-about .about-coords__list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 22px;
  width: 12px;
  height: 2px;
  background: var(--coral);
}

.page-about .about-coords__figure {
  margin: 0;
  background: var(--card);
  border: 1px solid var(--about-line);
  padding: clamp(18px, 3vw, 30px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-radius {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-coords__caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--slate);
  text-align: center;
}

/* ---------- 四个支撑面 ---------- */
.page-about .about-faces {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .about-face {
  background: var(--card);
  padding: 28px 22px 30px;
}

.page-about .about-face__no {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--coral);
}

.page-about .about-face__title {
  margin: 12px 0 10px;
  font-size: var(--h3);
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-face__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--slate);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  border-bottom: 1px solid var(--about-line);
  margin-bottom: 26px;
}

.page-about .about-timeline__tab {
  appearance: none;
  background: none;
  border: 0;
  border-bottom: 3px solid transparent;
  padding: 10px 16px 12px;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: .06em;
  color: var(--slate);
  cursor: pointer;
  transition: color .18s ease, border-color .18s ease;
}

.page-about .about-timeline__tab:hover {
  color: var(--ink);
}

.page-about .about-timeline__tab[aria-selected="true"] {
  color: var(--ink);
  font-weight: 700;
  border-bottom-color: var(--coral);
}

.page-about .about-timeline__tab:focus-visible {
  outline: 2px solid var(--celadon);
  outline-offset: 2px;
}

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

.page-about .about-mile {
  display: grid;
  gap: 18px;
  padding: clamp(24px, 3.4vw, 38px);
  background: var(--card);
  border: 1px solid var(--about-line);
  border-left: 6px solid var(--celadon);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-mile__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--data);
}

.page-about .about-mile__title {
  margin: 0;
  font-size: var(--h3);
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-mile__body {
  margin: 0;
  font-size: var(--step-1);
  line-height: 1.82;
  color: #22323d;
}

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

.page-about .about-mile__points li {
  position: relative;
  padding-left: 24px;
  font-size: 15px;
  line-height: 1.68;
  color: var(--slate);
}

.page-about .about-mile__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 14px;
  height: 2px;
  background: var(--celadon);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-about .about-team__lead {
  margin: 0 0 26px;
  font-size: var(--step-1);
  line-height: 1.82;
  color: rgba(244, 239, 226, .84);
}

.page-about .about-team__facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: rgba(216, 229, 225, .22);
  border: 1px solid rgba(216, 229, 225, .22);
}

.page-about .about-fact {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  justify-content: space-between;
  align-items: baseline;
  background: rgba(6, 20, 33, .55);
  padding: 14px 18px;
}

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

.page-about .about-fact__val {
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-about .about-team__note {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(244, 239, 226, .7);
  border-left: 3px solid var(--amber);
  padding-left: 14px;
}

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

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid rgba(108, 196, 214, .38);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-about .about-team__figure figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: rgba(244, 239, 226, .6);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  align-items: start;
}

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

.page-about .about-eco__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--about-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-about .about-eco__figure figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--slate);
}

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

.page-about .about-eco__item {
  background: var(--card);
  border: 1px solid var(--about-line-soft);
  padding: 18px 20px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: border-color .18s ease, transform .18s ease;
}

.page-about .about-eco__item:hover {
  border-color: var(--celadon);
  transform: translateX(3px);
}

.page-about .about-eco__item p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--slate);
}

.page-about .about-eco__flow {
  background: linear-gradient(140deg, var(--deep), var(--ink));
  color: var(--paper);
  padding: 22px 22px 26px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .about-eco__flow-title {
  margin: 0 0 16px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .01em;
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-flow li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  line-height: 1.5;
  color: rgba(244, 239, 226, .88);
}

.page-about .about-flow__no {
  flex: none;
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink);
  background: var(--data);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
}

/* ---------- 服务原则 ---------- */
.page-about .about-principles {
  display: grid;
  gap: 18px;
}

.page-about .about-principle {
  position: relative;
  background: var(--card);
  border: 1px solid var(--about-line);
  padding: 28px 24px 30px;
}

.page-about .about-principle--cut {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .about-principle__no {
  position: absolute;
  top: 18px;
  right: 20px;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--mist);
}

.page-about .about-principle__title {
  margin: 0 0 12px;
  font-size: var(--h3);
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-principle p {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--slate);
}

/* ---------- 荣誉 ---------- */
.page-about .about-honor {
  display: grid;
  gap: 16px;
  margin-bottom: 30px;
}

.page-about .about-honor__card {
  background: var(--card);
  border: 1px solid var(--about-line-soft);
  border-top: 3px solid var(--amber);
  padding: 26px 22px 28px;
}

.page-about .about-honor__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 4.6vw, 2.6rem);
  font-weight: 700;
  line-height: 1.05;
  color: var(--deep);
}

.page-about .about-honor__num small {
  font-size: .45em;
  margin-left: 3px;
  color: var(--slate);
}

.page-about .about-honor__title {
  margin: 12px 0 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-honor__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--slate);
}

.page-about .about-honor__links {
  display: grid;
  gap: 10px;
}

.page-about .about-link {
  display: block;
  padding: 16px 20px;
  background: var(--card);
  border: 1px solid var(--about-line-soft);
  border-left: 4px solid var(--celadon);
  color: var(--deep);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: background-color .18s ease, border-left-color .18s ease;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  background: rgba(216, 229, 225, .6);
  border-left-color: var(--coral);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  background:
    radial-gradient(120% 120% at 88% 100%, rgba(242, 100, 69, .22), transparent 58%),
    linear-gradient(140deg, var(--ink), var(--deep) 72%);
  color: var(--paper);
  padding: clamp(50px, 7vw, 92px) 0;
}

.page-about .about-cta__inner {
  display: grid;
  gap: 28px;
  align-items: center;
}

.page-about .about-cta__title {
  margin: 14px 0 14px;
  font-size: var(--h2);
  font-weight: 800;
  line-height: 1.16;
  color: var(--paper);
}

.page-about .about-cta__lead {
  margin: 0;
  max-width: 58ch;
  font-size: var(--step-1);
  line-height: 1.8;
  color: rgba(244, 239, 226, .82);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-honor__links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-faces {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-team__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-principles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(300px, .88fr);
  }

  .page-about .about-coords {
    grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr);
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr);
  }

  .page-about .about-eco {
    grid-template-columns: minmax(0, 1.02fr) minmax(320px, .98fr);
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }

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

@media (min-width: 1080px) {
  .page-about .about-faces {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 899px) {
  .page-about .about-hero__mark {
    display: none;
  }
}

@media (max-width: 479px) {
  .page-about .about-hero__actions .btn,
  .page-about .about-cta__actions .btn {
    flex: 1 1 100%;
    text-align: center;
  }

  .page-about .about-timeline__tab {
    padding: 9px 11px 11px;
    font-size: 14px;
  }
}