.page-about {
  background: var(--moon);
  color: var(--graphite);
}

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

.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 28px 0 8px;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--mist);
}

.page-about .breadcrumb-link {
  color: var(--ice);
  text-decoration: none;
  font-weight: 700;
  transition: color 160ms var(--ease-out);
}

.page-about .breadcrumb-link:hover {
  color: var(--orange);
}

.page-about .breadcrumb-item {
  color: var(--mist);
}

.page-about .breadcrumb-current {
  color: var(--orange);
  font-weight: 700;
}

/* ===== 首屏宣言 ===== */
.page-about .about-hero {
  padding: 8px 0 48px;
}

.page-about .about-hero-canvas {
  display: grid;
  gap: 36px;
  padding: 40px clamp(20px, 5vw, 64px) 60px;
  background:
    linear-gradient(132deg, rgba(255, 107, 53, 0.26) 0%, rgba(255, 107, 53, 0) 44%),
    radial-gradient(circle at 82% 20%, rgba(136, 192, 208, 0.16), transparent 40%),
    var(--navy);
  color: var(--moon);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
}

.page-about .about-hero-copy {
  max-width: 820px;
}

.page-about .about-hero-copy .section-eyebrow {
  color: var(--orange);
}

.page-about .about-hero h1 {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(1.7rem, 4.2vw, 2.8rem);
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--moon);
  margin: 14px 0 22px;
}

.page-about .about-hero-lede {
  font-size: 1.04rem;
  line-height: 1.8;
  color: rgba(245, 247, 250, 0.88);
  margin: 0 0 12px;
}

.page-about .about-hero-sub {
  font-size: 0.94rem;
  line-height: 1.7;
  color: rgba(136, 192, 208, 0.92);
  margin: 0;
}

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

.page-about .about-hero-actions .btn-outline {
  border: 1px solid rgba(245, 247, 250, 0.55);
  color: var(--moon);
}

.page-about .about-hero-actions .btn-outline:hover {
  background: rgba(245, 247, 250, 0.12);
  border-color: var(--moon);
}

.page-about .about-hero-quote {
  max-width: 360px;
  justify-self: end;
  border-left: 3px solid var(--orange);
  padding: 4px 0 4px 22px;
  align-self: end;
}

.page-about .about-hero-quote-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ice);
  margin: 0 0 8px;
}

.page-about .about-hero-quote blockquote {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.7;
  color: rgba(245, 247, 250, 0.72);
}

/* ===== 数据面板 ===== */
.page-about .about-dash {
  position: relative;
  z-index: 2;
  padding-bottom: 8px;
}

.page-about .about-dash-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: -36px;
  padding: 16px;
  background: #FFFFFF;
  border: 1px solid rgba(160, 180, 200, 0.25);
  box-shadow: 0 14px 30px rgba(11, 29, 58, 0.12);
}

.page-about .about-dash-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 14px 20px;
  background: var(--moon);
  transition: transform 160ms var(--ease-out), box-shadow 160ms var(--ease-out);
}

.page-about .about-dash-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 20px rgba(11, 29, 58, 0.1);
}

.page-about .about-dash-card .data-card-value {
  font-family: var(--font-mono);
  font-size: 1.55rem;
  line-height: 1.1;
  color: var(--navy);
  font-weight: 700;
}

.page-about .about-dash-card .data-card-label {
  font-size: 0.82rem;
  color: var(--mist);
  line-height: 1.3;
}

/* ===== 品牌起源 ===== */
.page-about .about-origin {
  padding: 56px 0 48px;
}

.page-about .about-origin-grid {
  display: grid;
  gap: 32px;
  align-items: center;
}

.page-about .about-origin-media {
  margin: 0;
  position: relative;
  box-shadow: 0 18px 36px rgba(11, 29, 58, 0.12);
}

.page-about .about-origin-media figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--mist);
  line-height: 1.5;
}

.page-about .about-origin-copy h2,
.page-about .about-infra-copy h2,
.page-about .about-milestones-head h2,
.page-about .about-ecosystem .section-head h2,
.page-about .about-credential .section-head h2,
.page-about .about-belief-inner h2,
.page-about .about-next-card h2 {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(1.45rem, 3vw, 2.1rem);
  line-height: 1.25;
  margin: 8px 0 16px;
}

.page-about .about-origin-copy p,
.page-about .about-infra-copy p,
.page-about .about-ecosystem .section-lede,
.page-about .about-milestones .section-lede,
.page-about .about-credential .section-lede,
.page-about .about-belief-text,
.page-about .about-next-text {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .about-origin-quote {
  margin: 20px 0 0;
  padding: 14px 18px;
  border-left: 4px solid var(--orange);
  background: rgba(255, 107, 53, 0.08);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  color: var(--navy);
  line-height: 1.6;
}

/* ===== 里程碑 ===== */
.page-about .about-milestones {
  background:
    radial-gradient(circle at 90% 12%, rgba(136, 192, 208, 0.14), transparent 32%),
    var(--navy);
  padding: 64px 0;
}

.page-about .about-milestones .section-eyebrow {
  color: var(--orange);
}

.page-about .about-milestones h2 {
  color: var(--moon);
}

.page-about .about-milestones .section-lede {
  color: var(--mist);
}

.page-about .about-timeline {
  position: relative;
  display: grid;
  gap: 30px;
  margin-top: 48px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 31px;
  top: 26px;
  bottom: 28px;
  width: 2px;
  background: linear-gradient(180deg, var(--orange) 0%, rgba(136, 192, 208, 0.35) 100%);
}

.page-about .about-tl-item {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 18px;
}

.page-about .about-tl-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding-top: 8px;
}

.page-about .about-tl-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 5px var(--navy);
  transition: transform 160ms var(--ease-out), background 160ms var(--ease-out);
}

.page-about .about-tl-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ice);
  white-space: nowrap;
}

.page-about .about-tl-item:hover .about-tl-dot {
  transform: scale(1.3);
  background: var(--orange-dark);
}

.page-about .about-tl-card {
  background: var(--navy-light);
  color: var(--moon);
  padding: 20px 22px 22px;
  transition: transform 160ms var(--ease-out), background 160ms var(--ease-out);
}

.page-about .about-tl-card:hover,
.page-about .about-tl-card:focus-within {
  transform: translateX(4px);
  background: #254a75;
}

.page-about .about-tl-card h3 {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.08rem;
  color: var(--moon);
  margin: 0 0 8px;
}

.page-about .about-tl-card p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.7;
  color: rgba(245, 247, 250, 0.78);
}

/* ===== 数据基础设施 ===== */
.page-about .about-infra {
  padding: 64px 0 56px;
}

.page-about .about-infra-grid {
  display: grid;
  gap: 32px;
}

.page-about .about-infra-copy .section-eyebrow,
.page-about .about-ecosystem .section-eyebrow,
.page-about .about-credential .section-eyebrow,
.page-about .about-belief-inner .section-eyebrow,
.page-about .about-next .section-eyebrow {
  color: var(--orange-dark);
}

.page-about .about-infra-lede {
  margin-bottom: 20px;
}

.page-about .about-infra-list {
  padding-left: 20px;
  margin: 0;
  display: grid;
  gap: 10px;
  line-height: 1.7;
  color: var(--graphite);
}

.page-about .about-infra-list li::marker {
  color: var(--orange);
}

.page-about .about-infra-media {
  margin: 0;
  box-shadow: 0 18px 36px rgba(11, 29, 58, 0.14);
}

.page-about .about-infra-media figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--mist);
  line-height: 1.5;
}

.page-about .about-infra-specs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 36px;
}

.page-about .about-spec {
  background: var(--navy);
  color: var(--moon);
  padding: 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-spec::after {
  content: "◍ ◍";
  font-size: 10px;
  letter-spacing: 4px;
  color: var(--green);
  opacity: 0.7;
}

.page-about .about-spec-num {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--orange);
}

.page-about .about-spec-label {
  font-size: 0.82rem;
  color: var(--mist);
  line-height: 1.4;
}

/* ===== 团队与生态 ===== */
.page-about .about-ecosystem {
  padding: 56px 0 64px;
  background: #FFFFFF;
  border-top: 1px solid rgba(160, 180, 200, 0.18);
  border-bottom: 1px solid rgba(160, 180, 200, 0.18);
}

.page-about .about-ecosystem .section-head {
  margin-bottom: 32px;
}

.page-about .about-ecosystem-grid {
  display: grid;
  gap: 28px;
}

.page-about .about-team-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.page-about .about-team-stat {
  background: var(--moon);
  border: 1px solid rgba(160, 180, 200, 0.22);
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: transform 160ms var(--ease-out), border-color 160ms var(--ease-out);
}

.page-about .about-team-stat:hover {
  transform: translateY(-3px);
  border-color: var(--orange);
}

.page-about .about-team-stat-num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.1;
}

.page-about .about-team-stat-label {
  font-size: 0.82rem;
  color: var(--mist);
  line-height: 1.3;
}

.page-about .about-ecosystem-media {
  margin: 0;
  box-shadow: 0 16px 32px rgba(11, 29, 58, 0.12);
}

.page-about .about-ecosystem-media figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--mist);
  line-height: 1.5;
}

.page-about .about-team-roles {
  background: var(--moon);
  border-left: 4px solid var(--orange);
  padding: 20px 22px;
  align-self: center;
}

.page-about .about-team-roles h3 {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.05rem;
  color: var(--navy);
  margin: 0 0 12px;
}

.page-about .about-team-roles ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
  color: var(--graphite);
  line-height: 1.7;
}

.page-about .about-team-roles li::marker {
  color: var(--orange);
}

/* ===== 资质与荣誉 ===== */
.page-about .about-credential {
  background: var(--navy);
  padding: 64px 0;
}

.page-about .about-credential .section-eyebrow {
  color: var(--orange);
}

.page-about .about-credential h2 {
  color: var(--moon);
}

.page-about .about-credential .section-lede {
  color: var(--mist);
}

.page-about .about-credential-grid {
  display: grid;
  gap: 16px;
  margin-top: 36px;
}

.page-about .about-cred-card {
  background: var(--navy-light);
  color: var(--moon);
  padding: 24px 22px 26px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 160ms var(--ease-out), transform 160ms var(--ease-out);
}

.page-about .about-cred-card:hover {
  background: #254a75;
  transform: translateY(-4px);
}

.page-about .about-cred-mark {
  width: 58px;
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--orange);
  color: var(--navy);
  font-weight: 800;
  font-size: 13px;
  margin-bottom: 18px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
}

.page-about .about-cred-card h3 {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.1rem;
  color: var(--moon);
  margin: 0 0 10px;
}

.page-about .about-cred-card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: rgba(245, 247, 250, 0.72);
}

/* ===== 我们的理念 ===== */
.page-about .about-belief {
  padding: 64px 0 56px;
}

.page-about .about-belief-inner {
  border-left: 8px solid var(--orange);
  padding: 28px clamp(20px, 4vw, 48px) 32px;
  background:
    repeating-linear-gradient(-45deg, rgba(11, 29, 58, 0.04) 0 2px, transparent 2px 12px),
    var(--moon);
  display: grid;
  gap: 12px;
}

.page-about .about-belief-inner h2 {
  color: var(--navy);
}

.page-about .about-belief-quote {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(1.4rem, 3vw, 2rem);
  color: var(--navy);
  margin: 0;
  line-height: 1.3;
}

.page-about .about-belief-text {
  max-width: 720px;
  margin: 0;
}

/* ===== 继续了解 ===== */
.page-about .about-next {
  padding: 12px 0 64px;
}

.page-about .about-next-card {
  background: #FFFFFF;
  border: 1px solid rgba(160, 180, 200, 0.22);
  padding: 32px clamp(20px, 4vw, 40px);
  display: grid;
  gap: 16px;
  box-shadow: 0 16px 32px rgba(11, 29, 58, 0.08);
}

.page-about .about-next-heading h2 {
  margin: 4px 0 0;
  color: var(--navy);
}

.page-about .about-next-text {
  margin: 0;
}

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

/* ===== 响应式：平板 ===== */
@media (min-width: 760px) {
  .page-about .about-hero-canvas {
    grid-template-columns: 1fr auto;
    align-items: end;
    padding: 56px 64px 64px;
  }

  .page-about .about-dash-grid {
    grid-template-columns: repeat(4, 1fr);
    margin-top: -48px;
    padding: 20px;
  }

  .page-about .about-origin-grid {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
  }

  .page-about .about-origin-media {
    order: -1;
  }

  .page-about .about-tl-item {
    grid-template-columns: 96px 1fr;
    gap: 28px;
  }

  .page-about .about-timeline::before {
    left: 47px;
  }

  .page-about .about-infra-grid {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 48px;
    align-items: center;
  }

  .page-about .about-infra-specs {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-ecosystem-grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-team-roles {
    grid-column: 1 / -1;
  }

  .page-about .about-credential-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }
}

/* ===== 响应式：桌面 ===== */
@media (min-width: 1100px) {
  .page-about .about-dash-grid {
    grid-template-columns: repeat(6, 1fr);
  }

  .page-about .about-origin {
    padding: 72px 0 64px;
  }

  .page-about .about-origin-grid {
    gap: 72px;
  }

  .page-about .about-tl-item {
    grid-template-columns: 120px 1fr;
    gap: 40px;
  }

  .page-about .about-timeline::before {
    left: 59px;
  }

  .page-about .about-tl-card {
    padding: 24px 28px 26px;
  }

  .page-about .about-infra {
    padding: 80px 0 68px;
  }

  .page-about .about-infra-grid {
    gap: 64px;
  }

  .page-about .about-ecosystem-grid {
    grid-template-columns: 0.8fr 1.2fr 0.9fr;
    gap: 32px;
  }

  .page-about .about-team-roles {
    grid-column: auto;
  }

  .page-about .about-team-stats {
    flex-direction: column;
    gap: 12px;
  }

  .page-about .about-team-stat {
    padding: 18px 16px;
  }

  .page-about .about-credential {
    padding: 80px 0;
  }

  .page-about .about-next-card {
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 32px;
  }
}