.page-about {
  --about-max: 1180px;
  --about-pad: clamp(1rem, 4vw, 3rem);
  --about-ink-strong: #102A26;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

/* 面包屑 */
.page-about .breadcrumb {
  max-width: var(--about-max);
  margin: 0 auto;
  padding: calc(var(--about-pad) * 0.8) var(--about-pad) 0;
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 0.55rem;
  color: var(--line);
}

.page-about .breadcrumb a {
  color: var(--paper-edge);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.12s var(--ease), border-color 0.12s var(--ease);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* 刊头首屏 */
.page-about .about-hero {
  position: relative;
  margin-top: clamp(1rem, 3vw, 1.75rem);
  border-top: 2px solid var(--gold);
  border-bottom: 1px solid var(--line);
  background: var(--field);
  overflow: hidden;
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(115deg, rgba(10, 22, 36, 0.96) 0%, rgba(10, 22, 36, 0.8) 46%, rgba(16, 42, 38, 0.6) 100%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
  max-width: var(--about-max);
  margin: 0 auto;
  padding: clamp(2.5rem, 7vw, 5.5rem) var(--about-pad) clamp(2rem, 5vw, 3.5rem);
}

.page-about .eyebrow {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-hero__title {
  margin: 0 0 1.25rem;
  font-family: var(--font-head);
  font-size: clamp(2rem, 6.2vw, 4rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--paper);
  max-width: 18ch;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 56ch;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(242, 232, 214, 0.82);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-fact {
  background: rgba(10, 22, 36, 0.78);
  padding: 0.9rem 1rem;
}

.page-about .about-fact__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3.4vw, 1.95rem);
  line-height: 1.1;
  color: var(--gold);
}

.page-about .about-fact__label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--slate);
}

/* 编号章节 */
.page-about .about-chapter {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
  max-width: var(--about-max);
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 4.5rem) var(--about-pad);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-chapter__aside {
  border-left: 2px solid var(--gold);
  padding-left: 0.9rem;
}

.page-about .about-chapter__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.6rem;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-chapter__note {
  margin: 0.7rem 0 0;
  font-family: var(--font-serif);
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--slate);
}

.page-about .about-chapter__body h2 {
  margin: 0 0 1.1rem;
  font-family: var(--font-head);
  font-size: clamp(1.45rem, 3.6vw, 2.35rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-chapter__lede {
  margin: 0 0 1.75rem;
  max-width: 64ch;
  font-size: 0.98rem;
  line-height: 1.85;
  color: rgba(242, 232, 214, 0.72);
}

/* 暖纸档案面板 */
.page-about .about-archive {
  background: var(--paper);
  color: var(--ink);
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 2px solid var(--paper-edge);
  box-shadow: var(--shadow-hard);
}

.page-about .about-archive p {
  margin: 0 0 1rem;
  font-size: 1rem;
  line-height: 1.9;
}

.page-about .about-archive p:last-child {
  margin-bottom: 0;
  font-family: var(--font-serif);
  color: var(--about-ink-strong);
}

/* 阶段时间轴 */
.page-about .about-stages {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stages::before {
  content: "";
  position: absolute;
  left: 1.15rem;
  top: 0.6rem;
  bottom: 0.6rem;
  width: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--teal) 55%, rgba(63, 163, 148, 0) 100%);
}

.page-about .about-stage {
  position: relative;
  display: grid;
  grid-template-columns: 3.5rem minmax(0, 1fr);
  gap: 0.9rem;
  padding-bottom: 1.9rem;
}

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

.page-about .about-stage__marker {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 2.35rem;
  height: 2.35rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--gold);
  background: var(--ink);
  border: 2px solid var(--gold);
}

.page-about .about-stage__title {
  margin: 0.3rem 0 0.4rem;
  font-family: var(--font-head);
  font-size: 1.05rem;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-stage__text {
  margin: 0;
  max-width: 62ch;
  font-size: 0.94rem;
  line-height: 1.85;
  color: rgba(242, 232, 214, 0.7);
}

/* 团队 */
.page-about .about-team {
  display: grid;
  gap: 1.75rem;
}

.page-about .about-team__grid {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-role {
  background: var(--field);
  padding: 1.05rem 1.2rem;
  transition: background 0.18s var(--ease);
}

.page-about .about-role:hover,
.page-about .about-role:focus-within {
  background: #163a34;
}

.page-about .about-role__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  line-height: 1;
  color: var(--teal-light);
}

.page-about .about-role__label {
  display: block;
  margin-top: 0.45rem;
  font-family: var(--font-head);
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-about .about-role__desc {
  margin: 0.55rem 0 0;
  font-size: 0.85rem;
  line-height: 1.75;
  color: rgba(242, 232, 214, 0.58);
  transition: color 0.18s var(--ease);
}

.page-about .about-role:hover .about-role__desc,
.page-about .about-role:focus-within .about-role__desc {
  color: rgba(242, 232, 214, 0.94);
}

.page-about .about-team__foot {
  margin: 1.1rem 0 0;
  padding-left: 0.9rem;
  border-left: 2px solid var(--steel);
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--slate);
}

/* 图片框 */
.page-about .media-frame {
  margin: 1.5rem 0 0;
  background: var(--field);
  border: 2px solid var(--line);
  overflow: hidden;
}

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

.page-about .media-frame__caption {
  padding: 0.65rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  line-height: 1.6;
  color: var(--slate);
  border-top: 1px solid var(--line);
}

/* 服务网络 */
.page-about .about-network {
  display: grid;
  gap: 1.75rem;
}

.page-about .about-network__map {
  padding: 0.9rem;
  background: var(--field);
  border: 1px solid var(--line);
}

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

.page-about .about-network__node circle {
  transition: fill 0.18s var(--ease);
}

.page-about .about-network__node:hover circle {
  fill: var(--ember);
}

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

.page-about .about-partners li {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  gap: 0.9rem;
  align-items: baseline;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(242, 232, 214, 0.78);
}

.page-about .about-partners .num {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  color: var(--gold);
}

/* 认可 */
.page-about .about-honor {
  display: grid;
  gap: 1rem;
}

.page-about .about-honor__card {
  padding: 1.25rem;
  background: var(--ink);
  border: 1px solid var(--line);
  border-top: 3px solid var(--gold);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.32);
}

.page-about .about-honor__kicker {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal-light);
}

.page-about .about-honor__card h3 {
  margin: 0.6rem 0 0.55rem;
  font-family: var(--font-head);
  font-size: 1.02rem;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-honor__card p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: rgba(242, 232, 214, 0.68);
}

.page-about .about-honor__more {
  margin: 1.4rem 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .about-honor__more a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
}

.page-about .about-honor__more a:hover,
.page-about .about-honor__more a:focus-visible {
  color: var(--ember);
  border-bottom-color: var(--ember);
}

/* 合作行动区 */
.page-about .about-cta {
  max-width: var(--about-max);
  margin: 0 auto;
  padding: clamp(1rem, 3vw, 2rem) var(--about-pad) clamp(3rem, 7vw, 5rem);
}

.page-about .about-cta__box {
  position: relative;
  padding: clamp(1.5rem, 4vw, 2.75rem);
  border: 2px solid var(--gold);
  background: linear-gradient(140deg, #0F2C28 0%, #14332E 48%, #1B3A54 100%);
}

.page-about .about-cta__box h2 {
  margin: 0 0 1rem;
  font-family: var(--font-head);
  font-size: clamp(1.4rem, 3.4vw, 2.1rem);
  line-height: 1.2;
  color: var(--paper);
}

.page-about .about-cta__text {
  margin: 0 0 0.9rem;
  max-width: 62ch;
  font-size: 0.95rem;
  line-height: 1.85;
  color: rgba(242, 232, 214, 0.8);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.4rem;
}

.page-about .about-cta__actions .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.5rem;
  font-family: var(--font-head);
  font-size: 0.9rem;
  letter-spacing: 0.03em;
  text-decoration: none;
  border: 2px solid var(--gold);
  transition: background 0.12s var(--ease), color 0.12s var(--ease), border-color 0.12s var(--ease);
}

.page-about .about-cta__actions .btn--signal {
  background: var(--ember);
  border-color: var(--ember);
  color: #10131A;
}

.page-about .about-cta__actions .btn--signal:hover,
.page-about .about-cta__actions .btn--signal:focus-visible {
  background: var(--gold);
  border-color: var(--gold);
}

.page-about .about-cta__actions .btn--ghost {
  background: transparent;
  color: var(--paper);
}

.page-about .about-cta__actions .btn--ghost:hover,
.page-about .about-cta__actions .btn--ghost:focus-visible {
  background: rgba(200, 162, 74, 0.16);
  color: var(--gold);
}

.page-about a:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

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

@media (min-width: 720px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-chapter {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: clamp(1.5rem, 4vw, 3.5rem);
  }

  .page-about .about-chapter__aside {
    position: sticky;
    top: calc(var(--topline) + 2rem);
    align-self: start;
  }

  .page-about .about-network {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-network__map {
    position: sticky;
    top: calc(var(--topline) + 2rem);
  }
}

@media (min-width: 1020px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    align-items: start;
  }

  .page-about .media-frame {
    margin-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}