.page-about {
  background: var(--indigo);
  color: var(--warm);
  overflow-x: hidden;
}

.page-about .about-crumb {
  padding-top: clamp(16px, 3vw, 28px);
}

.page-about .about-crumb .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-crumb .breadcrumbs a {
  color: var(--cyan);
  text-decoration: none;
}

.page-about .about-crumb .breadcrumbs a:hover {
  text-decoration: underline;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 4vw, 40px) 0 clamp(40px, 6vw, 72px);
}

.page-about .about-hero__spine {
  display: none;
  color: var(--mist);
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 36px);
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-size: clamp(44px, 9vw, 104px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  font-weight: 900;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 46ch;
  color: var(--mist-soft);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: clamp(16px, 2.4vw, 24px) 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px;
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-hero__fact-label {
  font-size: 13px;
  line-height: 1.55;
  color: var(--mist);
}

.page-about .about-hero__media {
  position: relative;
  margin: clamp(28px, 4vw, 48px) 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
}

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

/* ---------- 通用小节标题组 ---------- */

.page-about .about-section-head {
  max-width: 66ch;
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-about .about-section-head .section-head__note {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 时间线 ---------- */

.page-about .about-years {
  list-style: none;
  margin: 0 0 clamp(24px, 3.4vw, 36px);
  padding: 0 0 4px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
}

.page-about .about-years__link {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--cyan-line);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.25s var(--ease), color 0.25s var(--ease);
}

.page-about .about-years__link:hover,
.page-about .about-years__link:focus-visible {
  background: var(--cyan);
  color: var(--abyss);
}

.page-about .about-tl {
  list-style: none;
  margin: 0 0 0 6px;
  padding: 0;
  border-left: 1px solid var(--line);
}

.page-about .about-tl__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 0 0 clamp(30px, 4.4vw, 52px) clamp(20px, 3vw, 32px);
}

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

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(59, 240, 228, 0.14);
}

.page-about .about-tl__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-about .about-tl__title {
  margin: 6px 0 10px;
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.3;
  color: var(--warm);
}

.page-about .about-tl__body p {
  margin: 0 0 14px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist-soft);
}

.page-about .about-tl__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
}

/* ---------- 工作节奏 ---------- */

.page-about .about-craft__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-about .about-craft__lede {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--mist-soft);
}

.page-about .about-rhythm {
  list-style: none;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-rhythm__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(7, 11, 31, 0.35);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .about-rhythm__item:hover {
  border-color: var(--cyan-line);
  transform: translateY(-3px);
}

.page-about .about-rhythm__time {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .about-rhythm__label {
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist-soft);
}

.page-about .about-craft__media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

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

/* ---------- 团队分工 ---------- */

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .about-role {
  padding: clamp(22px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--card-indigo);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .about-role:hover {
  transform: translateY(-4px);
  border-color: var(--cyan-line);
}

.page-about .about-role__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(40px, 5vw, 54px);
  font-weight: 700;
  line-height: 1;
  color: var(--warm);
  transform-origin: left center;
  transition: transform 0.3s var(--ease), color 0.3s var(--ease);
}

.page-about .about-role:hover .about-role__num {
  transform: scale(1.07);
  color: var(--cyan);
}

.page-about .about-role__unit {
  margin-left: 8px;
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-role__title {
  margin: 16px 0 8px;
  font-size: 20px;
  line-height: 1.3;
}

.page-about .about-role__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-soft);
}

/* ---------- 内容伙伴 ---------- */

.page-about .about-eco__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 42px);
  align-items: center;
}

.page-about .about-eco__nodes {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-eco__node {
  position: relative;
  display: grid;
  gap: 10px;
  justify-items: start;
  padding: 18px 0 18px 24px;
  border-left: 1px solid var(--cyan-line);
}

.page-about .about-eco__node::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 26px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--zone-plum);
  border: 2px solid var(--cyan);
  transition: background 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .about-eco__node:hover::before,
.page-about .about-eco__node:focus-within::before {
  background: var(--orange);
  box-shadow: 0 0 0 5px rgba(255, 122, 47, 0.18);
}

.page-about .about-eco__node-text {
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-soft);
}

.page-about .about-eco__media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

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

.page-about .about-eco__more {
  margin: clamp(26px, 3.4vw, 38px) 0 0;
  font-size: 15px;
}

/* ---------- 服务地区 ---------- */

.page-about .about-region__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  align-items: center;
}

.page-about .about-region__text p {
  margin: 0 0 14px;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist-soft);
}

.page-about .about-region__facts {
  list-style: none;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: clamp(18px, 2.4vw, 26px) 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 12px;
}

.page-about .about-region__facts li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
}

.page-about .about-region__key {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

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

.page-about .about-map {
  position: relative;
  min-height: 300px;
  border: 1px solid var(--cyan-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background:
    radial-gradient(circle at 62% 50%, rgba(59, 240, 228, 0.16), transparent 54%),
    linear-gradient(160deg, var(--zone-teal), var(--abyss) 72%);
}

.page-about .about-map::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(151, 163, 201, 0.35) 1px, transparent 1px);
  background-size: 22px 22px;
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-map__ring {
  position: absolute;
  left: 62%;
  top: 50%;
  width: 120px;
  height: 120px;
  margin: -60px 0 0 -60px;
  border-radius: 50%;
  border: 1px solid var(--cyan-line);
  box-shadow: 0 0 0 0 rgba(59, 240, 228, 0.3);
  transition: box-shadow 0.4s var(--ease), border-color 0.4s var(--ease);
}

.page-about .about-map:hover .about-map__ring {
  border-color: var(--cyan);
  box-shadow: 0 0 0 24px rgba(59, 240, 228, 0.08);
}

.page-about .about-map__pin {
  position: absolute;
  left: 62%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--cyan);
  background: var(--abyss);
  color: var(--warm);
  font-size: 13px;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.page-about .about-map__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--orange);
}

.page-about .about-map__legend {
  position: absolute;
  left: 18px;
  bottom: 16px;
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .about-map__key {
  width: 24px;
  height: 3px;
  border-radius: 2px;
  background: var(--cyan);
}

/* ---------- 里程碑 ---------- */

.page-about .about-miles__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-about .about-miles__item {
  padding: clamp(22px, 3vw, 30px);
  background: var(--card-indigo);
  display: grid;
  gap: 8px;
  align-content: start;
  transition: background-image 0.3s var(--ease);
}

.page-about .about-miles__item:hover {
  background-image: linear-gradient(rgba(59, 240, 228, 0.07), rgba(59, 240, 228, 0.07));
}

.page-about .about-miles__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.4vw, 38px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-miles__label {
  margin: 0;
  font-size: 15px;
  line-height: 1.5;
  color: var(--warm);
}

.page-about .about-miles__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 收尾 ---------- */

.page-about .about-cta__inner {
  display: grid;
  gap: 16px;
  padding: clamp(26px, 5vw, 56px);
  border: 1px solid var(--cyan-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--zone-plum), var(--zone-teal));
}

.page-about .about-cta__title {
  margin: 0;
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1.25;
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist-soft);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.page-about .about-cta__more {
  margin: 4px 0 0;
  font-size: 15px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 600px) {
  .page-about .about-rhythm__item {
    grid-template-columns: minmax(112px, 140px) minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }

  .page-about .about-region__facts li {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }

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

@media (min-width: 860px) {
  .page-about .about-tl__item {
    grid-template-columns: minmax(120px, 150px) minmax(0, 1fr);
    column-gap: clamp(20px, 3vw, 44px);
    align-items: start;
  }

  .page-about .about-tl__item::before {
    top: 6px;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: clamp(32px, 5vw, 80px);
    align-items: end;
  }

  .page-about .about-eco__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 380px);
  }

  .page-about .about-region__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 400px);
  }
}

@media (min-width: 940px) {
  .page-about .about-craft__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 440px);
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-miles__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-map {
    min-height: 380px;
  }
}

@media (min-width: 1400px) {
  .page-about .about-hero__spine {
    display: block;
    position: absolute;
    left: calc((100vw - var(--shell-w)) / 2 - 42px);
    top: 128px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-role__num,
  .page-about .about-rhythm__item,
  .page-about .about-map__ring,
  .page-about .about-years__link {
    transition: none;
  }

  .page-about .about-role:hover,
  .page-about .about-rhythm__item:hover {
    transform: none;
  }

  .page-about .about-role:hover .about-role__num {
    transform: none;
  }
}