.page-about {
  background: var(--ink);
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 3.4vw, 36px) 0 clamp(36px, 5.5vw, 72px);
  background:
    radial-gradient(720px 420px at 82% -8%, var(--green-veil), transparent 70%),
    radial-gradient(620px 400px at 4% 104%, var(--cyan-veil), transparent 72%),
    var(--ink);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--green) 22%, var(--cyan) 58%, transparent);
  opacity: 0.55;
}

.page-about .about-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: end;
}

.page-about .breadcrumbs {
  margin: 0 0 18px;
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-about .about-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.85rem, 4.6vw, 3.3rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
  color: var(--paper);
  max-width: 15em;
}

.page-about .about-lede {
  margin: 18px 0 0;
  max-width: 54ch;
  font-size: clamp(0.98rem, 1.6vw, 1.06rem);
  line-height: 1.8;
  color: rgba(244, 248, 251, 0.78);
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: clamp(22px, 3.4vw, 34px) 0 0;
  border: 1px solid var(--line);
  background: rgba(13, 36, 54, 0.55);
  clip-path: var(--cut-tag);
}

.page-about .hero-stat {
  padding: 12px clamp(10px, 1.6vw, 16px) 14px;
  min-width: 0;
}

.page-about .hero-stat + .hero-stat {
  border-left: 1px solid var(--line);
}

.page-about .hero-stat dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .hero-stat dd {
  margin: 6px 0 0;
  font-size: clamp(1rem, 2vw, 1.22rem);
  font-weight: 700;
  color: var(--paper);
  white-space: nowrap;
}

.page-about .hero-stat dd .num {
  color: var(--green);
  font-size: 1.28em;
  letter-spacing: -0.01em;
}

.page-about .hero-figure {
  position: relative;
  margin: 0;
  min-width: 0;
}

.page-about .hero-media {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  clip-path: var(--cut-media);
}

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

.page-about .hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(200deg, rgba(8, 24, 38, 0) 42%, rgba(8, 24, 38, 0.74) 100%),
    radial-gradient(120% 60% at 50% 0%, rgba(23, 201, 100, 0.16), transparent 62%);
  pointer-events: none;
}

.page-about .hero-annot {
  display: none;
}

.page-about .hero-caption {
  margin-top: 12px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .hero-annot {
    display: block;
    position: absolute;
    top: 24px;
    right: 12px;
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--cyan);
    opacity: 0.85;
    z-index: 1;
  }
}

/* ---------- 双栏骨架 ---------- */
.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  margin-top: clamp(32px, 5vw, 64px);
  margin-bottom: clamp(44px, 6vw, 88px);
}

.page-about .about-body {
  display: grid;
  gap: clamp(40px, 6vw, 84px);
  min-width: 0;
}

.page-about .rail {
  display: none;
}

.page-about .rail-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
}

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

.page-about .rail-list a {
  display: block;
  padding: 9px 0 9px 14px;
  border-left: 2px solid var(--line);
  font-size: 13.5px;
  line-height: 1.4;
  color: var(--muted);
  text-decoration: none;
  transition: color 160ms ease, border-color 160ms ease, padding-left 160ms ease;
}

.page-about .rail-list a:hover {
  color: var(--paper);
  border-left-color: var(--line-strong);
  padding-left: 18px;
}

.page-about .rail-list a[aria-current="true"] {
  color: var(--paper);
  font-weight: 700;
  border-left-color: var(--green);
}

@media (min-width: 1024px) {
  .page-about .about-shell {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
    min-width: 0;
  }
}

.page-about #origin,
.page-about #timeline,
.page-about #editorial,
.page-about #team,
.page-about #partners,
.page-about #principles {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

/* ---------- 章节通用 ---------- */
.page-about .chapter {
  min-width: 0;
}

.page-about .chapter-head {
  max-width: 64ch;
  margin-bottom: clamp(20px, 3vw, 32px);
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.page-about .chapter-head h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.35rem, 3vw, 2.05rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .chapter-lede {
  margin: 14px 0 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .body-p {
  margin: 0 0 14px;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(244, 248, 251, 0.8);
}

.page-about .body-p:last-child {
  margin-bottom: 0;
}

/* ---------- 品牌起点 ---------- */
.page-about .origin-figure {
  margin: 0 0 clamp(20px, 3vw, 30px);
}

.page-about .origin-media {
  position: relative;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  clip-path: var(--cut-media);
}

.page-about .origin-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
  opacity: 0.66;
  filter: saturate(0.72);
}

.page-about .origin-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(8, 24, 38, 0.12), rgba(8, 24, 38, 0.86)),
    radial-gradient(70% 60% at 18% 28%, rgba(23, 201, 100, 0.18), transparent 70%);
  pointer-events: none;
}

/* ---------- 时间轴 ---------- */
.page-about .tl {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 32px;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--green), var(--cyan) 52%, rgba(53, 224, 208, 0) 96%);
}

.page-about .tl-node {
  position: relative;
  padding-bottom: clamp(22px, 3vw, 32px);
}

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

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 7px;
  width: 12px;
  height: 12px;
  background: var(--ink);
  border: 2px solid var(--green);
  transform: rotate(45deg);
  transition: background-color 160ms ease, border-color 160ms ease;
}

.page-about .tl-node:hover::before {
  background: var(--green);
  border-color: var(--cyan);
}

.page-about .tl-year {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3vw, 1.85rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--green);
  font-variant-numeric: tabular-nums;
}

.page-about .tl-body h3 {
  margin: 8px 0 0;
  font-size: clamp(1rem, 1.8vw, 1.14rem);
  font-weight: 700;
  color: var(--paper);
}

.page-about .tl-body p {
  margin: 8px 0 0;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

@media (min-width: 760px) {
  .page-about .tl-node {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 0 20px;
    align-items: start;
  }

  .page-about .tl-body h3 {
    margin-top: 0;
  }
}

/* ---------- 内容生产 ---------- */
.page-about .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .flow-step {
  padding: clamp(16px, 2.4vw, 22px);
  background: linear-gradient(160deg, rgba(13, 36, 54, 0.94), rgba(8, 24, 38, 0.94));
  border: 1px solid var(--line);
  clip-path: var(--cut-tag);
  transition: border-color 160ms ease;
}

.page-about .flow-step:hover {
  border-color: var(--line-strong);
}

.page-about .flow-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--amber);
}

.page-about .flow-step h3 {
  margin: 10px 0 0;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .flow-step p {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .prod-note {
  margin-top: clamp(18px, 3vw, 26px);
  padding: clamp(18px, 2.6vw, 26px);
  background: rgba(10, 42, 34, 0.44);
  border-left: 3px solid var(--green);
}

.page-about .prod-note h3 {
  margin: 0 0 12px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--paper);
}

@media (min-width: 780px) {
  .page-about .flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 28px);
}

.page-about .team-figure {
  margin: 0;
  min-width: 0;
}

.page-about .team-media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  clip-path: var(--cut-media);
}

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

.page-about .team-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(190deg, rgba(8, 24, 38, 0.1), rgba(8, 24, 38, 0.58));
  pointer-events: none;
}

.page-about .crew {
  list-style: none;
  margin: clamp(16px, 2.4vw, 22px) 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .crew-item {
  padding: 12px 10px 14px;
  background: rgba(13, 36, 54, 0.78);
  min-width: 0;
}

.page-about .crew-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .crew-role {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  color: var(--muted);
}

.page-about .team-tail {
  margin-bottom: 0;
}

@media (min-width: 560px) {
  .page-about .crew {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-about .team-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
}

/* ---------- 合作生态 ---------- */
.page-about .eco {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .eco-item {
  padding: clamp(16px, 2.4vw, 22px);
  border: 1px solid var(--line);
  border-top: 2px solid var(--muted);
  background: rgba(13, 36, 54, 0.6);
  transition: border-color 160ms ease, background-color 160ms ease;
}

.page-about .eco-item:hover {
  border-top-color: var(--green);
  background: rgba(23, 201, 100, 0.08);
}

.page-about .eco-num {
  display: block;
  margin: 12px 0 4px;
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4vw, 2.35rem);
  font-weight: 700;
  line-height: 1;
  color: var(--green);
  font-variant-numeric: tabular-nums;
}

.page-about .eco-item:nth-child(2) .eco-num {
  color: var(--cyan);
}

.page-about .eco-item:nth-child(3) .eco-num {
  color: var(--amber);
}

.page-about .eco-label {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .eco-text {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .honor {
  margin-top: clamp(20px, 3vw, 30px);
  padding-top: clamp(18px, 2.6vw, 26px);
  border-top: 1px dashed var(--line-strong);
}

.page-about .honor-label {
  margin: 0 0 12px;
  color: var(--muted);
}

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

.page-about .honor-item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 14px;
  border-left: 2px solid var(--green);
  background: var(--green-veil);
}

.page-about .honor-year {
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--green);
  font-variant-numeric: tabular-nums;
}

.page-about .honor-text {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(244, 248, 251, 0.86);
}

@media (min-width: 700px) {
  .page-about .honor-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 820px) {
  .page-about .eco {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

/* ---------- 长期方向 ---------- */
.page-about .principle-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .principle {
  padding: 18px 0 0;
  border-top: 2px solid var(--line-strong);
  transition: border-top-color 160ms ease;
}

.page-about .principle:hover {
  border-top-color: var(--green);
}

.page-about .principle h3 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .principle p {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-cta {
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(20px, 3vw, 32px);
  background:
    radial-gradient(520px 260px at 84% 8%, var(--green-veil), transparent 70%),
    var(--ink-2);
  border: 1px solid var(--line);
  clip-path: var(--cut-panel);
}

.page-about .cta-lede {
  margin: 0;
  max-width: 44ch;
  font-size: clamp(1rem, 2vw, 1.14rem);
  font-weight: 700;
  line-height: 1.6;
  color: var(--paper);
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

@media (min-width: 780px) {
  .page-about .principle-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .rail-list a,
  .page-about .tl-node::before,
  .page-about .flow-step,
  .page-about .eco-item,
  .page-about .principle {
    transition: none;
  }
}