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

.page-about figure {
  margin: 0;
}

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

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-body);
  font-weight: 800;
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(18px, 3vw, 28px) 0 clamp(52px, 7vw, 92px);
  background:
    radial-gradient(circle at 88% 8%, rgba(200, 255, 61, 0.18), transparent 56%),
    radial-gradient(circle at 4% 92%, rgba(255, 90, 54, 0.14), transparent 48%),
    var(--green-800);
  color: var(--mist);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: repeating-linear-gradient(90deg, rgba(200, 255, 61, 0.55) 0 2px, transparent 2px 14px);
}

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

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 clamp(24px, 4vw, 44px);
  padding: 0;
  list-style: none;
  font-size: 13px;
}

.page-about .breadcrumb-link {
  color: var(--on-dark);
  text-decoration: none;
}

.page-about .breadcrumb-link:hover,
.page-about .breadcrumb-link:focus-visible {
  color: var(--lime);
}

.page-about .breadcrumb-item[aria-current="page"] {
  color: var(--lime);
}

.page-about .hero-grid {
  display: grid;
  gap: clamp(28px, 5vw, 48px);
}

.page-about .about-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--lime-deep);
}

.page-about .about-eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  border-radius: var(--pill);
  background: var(--orange);
}

.page-about .about-hero .about-eyebrow,
.page-about .block-history .about-eyebrow,
.page-about .block-promise .about-eyebrow {
  color: var(--lime);
}

.page-about .about-hero h1 {
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  font-size: clamp(38px, 8.4vw, 90px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--mist);
}

.page-about .hero-lead {
  margin: 0 0 clamp(24px, 3vw, 34px);
  max-width: 62ch;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--on-dark);
}

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

.page-about .btn-ghost {
  background: transparent;
  border: 1px solid rgba(200, 255, 61, 0.45);
  color: var(--mist);
}

.page-about .btn-ghost:hover,
.page-about .btn-ghost:focus-visible {
  background: rgba(200, 255, 61, 0.14);
  color: var(--lime);
}

.page-about .hero-panel {
  border: 1px solid rgba(200, 255, 61, 0.28);
  border-radius: var(--radius-lg);
  background: rgba(7, 31, 24, 0.55);
  padding: clamp(20px, 3vw, 26px);
  box-shadow: var(--shadow-soft);
}

.page-about .panel-title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--on-dark-soft);
}

.page-about .panel-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 12px;
  margin: 0;
}

.page-about .panel-stat dt {
  font-size: 12px;
  color: var(--on-dark-soft);
  letter-spacing: 0.04em;
}

.page-about .panel-stat dd {
  margin: 5px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.4vw, 25px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--lime);
}

.page-about .panel-note {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px dashed rgba(200, 255, 61, 0.26);
  font-size: 13px;
  line-height: 1.75;
  color: var(--on-dark-soft);
}

/* ============ 通用分区 ============ */
.page-about .about-block {
  padding: clamp(48px, 7vw, 96px) 0;
}

.page-about .section-head {
  margin-bottom: clamp(24px, 4vw, 40px);
  max-width: 68ch;
}

.page-about .section-head h2 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4.4vw, 48px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--green-800);
}

.page-about .section-head p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--grey);
}

.page-about .block-history .section-head h2,
.page-about .block-promise .section-head h2 {
  color: var(--mist);
}

.page-about .block-history .section-head p {
  color: var(--on-dark);
}

/* ============ 起点与方向 ============ */
.page-about .block-origin {
  background: var(--mist);
}

.page-about .origin-grid {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
}

.page-about .origin-intro h2 {
  margin: 0 0 16px;
  font-size: clamp(28px, 4.4vw, 48px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--green-800);
}

.page-about .origin-sub {
  margin: 0;
  max-width: 26ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
  color: var(--grey);
}

.page-about .origin-body p {
  margin: 0 0 18px;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .origin-quote {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: clamp(18px, 2.6vw, 24px) clamp(18px, 2.6vw, 26px);
  border-left: 3px solid var(--lime-deep);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: var(--grass);
  color: var(--green-800);
  font-size: 15px;
  line-height: 1.85;
}

/* ============ 内容生产 ============ */
.page-about .block-team {
  background: var(--grass);
}

.page-about .team-grid {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .about-figure img {
  width: 100%;
  border-radius: var(--radius-lg);
  object-fit: cover;
  background: var(--green-800);
  box-shadow: var(--shadow-soft);
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--grey);
}

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

.page-about .role-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: clamp(16px, 2.4vw, 22px);
}

.page-about .role-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 8px;
}

.page-about .role-no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--lime-deep);
}

.page-about .role-card h3 {
  margin: 0;
  font-size: 18px;
  color: var(--green-800);
}

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

/* ============ 发展历程 ============ */
.page-about .block-history {
  background: var(--green-900);
  color: var(--mist);
}

.page-about .milestone-nav {
  display: flex;
  gap: 8px;
  margin: 0 0 clamp(24px, 4vw, 36px);
  padding: 0 0 8px;
  overflow-x: auto;
}

.page-about .milestone-nav a {
  flex: 0 0 auto;
  padding: 8px 15px;
  border: 1px solid rgba(200, 255, 61, 0.35);
  border-radius: var(--pill);
  font-size: 13px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--mist);
  transition: background 200ms ease, color 200ms ease, border-color 200ms ease;
}

.page-about .milestone-nav a:hover,
.page-about .milestone-nav a:focus-visible {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--green-900);
}

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

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--lime), rgba(200, 255, 61, 0.1));
}

.page-about .timeline-item {
  position: relative;
  padding: 0 0 clamp(26px, 4vw, 40px) clamp(48px, 6vw, 72px);
}

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

.page-about .timeline-node {
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: var(--pill);
  background: var(--lime);
  color: var(--green-900);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
}

.page-about .timeline-era {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--lime);
}

.page-about .timeline-item h3 {
  margin: 0 0 8px;
  font-size: clamp(18px, 2.2vw, 22px);
  color: var(--mist);
}

.page-about .timeline-item p {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--on-dark);
}

.page-about .history-figure {
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .history-figure img {
  width: 100%;
  border-radius: var(--radius-lg);
  object-fit: cover;
  background: var(--green-800);
  border: 1px solid rgba(200, 255, 61, 0.18);
}

.page-about .history-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--on-dark-soft);
}

/* ============ 服务场景 ============ */
.page-about .block-audience {
  background: var(--mist);
}

.page-about .audience-grid {
  display: grid;
  gap: 14px;
}

.page-about .audience-card {
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #fff;
}

.page-about .audience-card:nth-child(1),
.page-about .audience-card:nth-child(4) {
  background: var(--grass);
  border-color: transparent;
}

.page-about .audience-card h3 {
  margin: 14px 0 8px;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.35;
  color: var(--green-800);
}

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

/* ============ 合作生态 ============ */
.page-about .block-eco {
  background: linear-gradient(180deg, var(--mist) 0%, rgba(139, 163, 181, 0.34) 100%);
}

.page-about .eco-grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .eco-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 clamp(20px, 3vw, 28px);
  padding: 0;
  list-style: none;
}

.page-about .eco-chip {
  display: inline-block;
  padding: 9px 16px;
  border: 1px solid var(--line-strong);
  border-radius: var(--pill);
  background: #fff;
  font-size: 14px;
  color: var(--green-800);
}

.page-about .eco-chip--hot {
  background: var(--green-800);
  border-color: transparent;
  color: var(--lime);
}

.page-about .eco-acc {
  margin-bottom: 10px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: #fff;
}

.page-about .eco-acc summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  color: var(--green-800);
}

.page-about .eco-acc summary::-webkit-details-marker {
  display: none;
}

.page-about .eco-acc summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--lime-deep);
}

.page-about .eco-acc[open] summary::after {
  content: "–";
}

.page-about .eco-acc p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--grey);
}

.page-about .eco-side {
  padding: clamp(20px, 3vw, 28px);
  border-radius: var(--radius-lg);
  background: var(--green-800);
  color: var(--mist);
}

.page-about .eco-side-title {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--on-dark-soft);
}

.page-about .eco-side dl {
  display: grid;
  gap: 16px;
  margin: 0;
}

.page-about .eco-side dt {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--on-dark-soft);
}

.page-about .eco-side dd {
  margin: 4px 0 0;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--lime);
}

/* ============ 本地服务 ============ */
.page-about .block-promise {
  background:
    radial-gradient(circle at 92% 6%, rgba(255, 90, 54, 0.16), transparent 52%),
    var(--green-800);
  color: var(--mist);
}

.page-about .promise-grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .promise-figure img {
  width: 100%;
  border-radius: var(--radius-lg);
  object-fit: cover;
  background: var(--green-900);
  border: 1px solid rgba(200, 255, 61, 0.18);
}

.page-about .promise-body h2 {
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-about .promise-list {
  margin: 0 0 clamp(22px, 3vw, 30px);
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .promise-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--on-dark);
}

.page-about .promise-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: var(--pill);
  background: var(--lime);
}

.page-about .promise-list strong {
  color: var(--mist);
  font-weight: 700;
}

.page-about .promise-contact {
  margin-bottom: clamp(22px, 3vw, 30px);
}

.page-about .block-promise .contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 12px;
  padding: 11px 0;
  border-bottom: 1px dashed rgba(200, 255, 61, 0.22);
}

.page-about .contact-label {
  flex: 0 0 auto;
  min-width: 76px;
  font-size: 13px;
  color: var(--on-dark-soft);
}

.page-about .contact-value {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15px;
  color: var(--mist);
  word-break: break-all;
}

.page-about .block-promise .copy-btn {
  flex: 0 0 auto;
  padding: 5px 13px;
  border: 1px solid rgba(200, 255, 61, 0.4);
  border-radius: var(--pill);
  background: transparent;
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--lime);
  cursor: pointer;
}

.page-about .block-promise .copy-btn:hover,
.page-about .block-promise .copy-btn:focus-visible {
  background: var(--lime);
  color: var(--green-900);
}

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

/* ============ 响应式 ============ */
@media (min-width: 720px) {
  .page-about .audience-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .hero-actions {
    gap: 14px;
  }
}

@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.85fr);
    align-items: end;
  }

  .page-about .origin-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }

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

  .page-about .eco-grid {
    grid-template-columns: minmax(0, 1fr) minmax(240px, 300px);
    align-items: start;
  }

  .page-about .promise-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
  }

  .page-about .promise-figure {
    position: sticky;
    top: 108px;
  }

  .page-about .timeline-item {
    padding-bottom: clamp(30px, 3vw, 44px);
  }
}

@media (min-width: 1120px) {
  .page-about .audience-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }
}