.page-about {
  display: block;
  background: var(--bg);
  color: var(--bone);
  font-family: var(--font-body);
  overflow-x: clip;
}

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

.page-about .section-head {
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.page-about .section-head__index {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  color: var(--amber);
}

.page-about .section-head__note {
  color: var(--mint);
  max-width: 62ch;
}

.page-about .media {
  position: relative;
  display: block;
  overflow: hidden;
  margin: 0;
}

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

.page-about .media__caption {
  margin: 0;
  padding: 0.7rem 1rem;
  font-size: 0.82rem;
  line-height: 1.65;
  letter-spacing: 0.04em;
  color: var(--mint);
  background: rgba(6, 18, 14, 0.72);
  border-top: 1px solid var(--line);
}

/* ---------- 01 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding-top: clamp(1.25rem, 3vw, 2rem);
  background:
    radial-gradient(90% 70% at 86% -12%, rgba(198, 255, 61, 0.13), transparent 62%),
    radial-gradient(75% 60% at 0% 18%, rgba(18, 53, 40, 0.9), transparent 72%),
    var(--bg);
}

.page-about .breadcrumb {
  margin-bottom: clamp(1.25rem, 3vw, 2.25rem);
}

.page-about .about-hero__tag {
  display: inline-block;
  margin: 0 0 0.9rem;
  padding: 0.3rem 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--lime);
  background: var(--panel);
  border: 1px solid var(--line);
  clip-path: var(--cut-sm);
}

.page-about .about-hero__title {
  margin: 0 0 clamp(1rem, 2.5vw, 1.4rem);
  max-width: 19ch;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.05rem, 7.6vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -0.015em;
  color: var(--bone);
}

.page-about .about-hero__hl {
  color: var(--lime);
  position: relative;
  white-space: nowrap;
}

.page-about .about-hero__lead {
  margin: 0 0 clamp(1.5rem, 4vw, 2.25rem);
  max-width: 58ch;
  font-size: clamp(1rem, 2.2vw, 1.14rem);
  line-height: 1.85;
  color: var(--mint);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 clamp(1.75rem, 4vw, 2.5rem);
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  clip-path: var(--cut);
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: clamp(0.9rem, 2.2vw, 1.4rem);
  background: linear-gradient(180deg, var(--panel), var(--bg-2));
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: clamp(1.45rem, 4.6vw, 2.2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .about-hero__unit {
  margin-left: 0.1em;
  font-size: 0.58em;
  color: var(--lime-soft);
}

.page-about .about-hero__label {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--mint);
}

.page-about .about-hero__banner {
  position: relative;
  margin: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-hero__banner .media {
  width: 100%;
}

.page-about .about-hero__banner img {
  width: 100%;
  max-height: 56vh;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.05);
}

.page-about .about-hero__banner::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(6, 18, 14, 0.1) 35%, rgba(6, 18, 14, 0.78) 100%);
}

.page-about .about-hero__banner .media__caption {
  position: relative;
  z-index: 2;
  border-top: 0;
  background: none;
  padding: 0.7rem 1rem;
}

/* ---------- 02 定位 ---------- */

.page-about .about-origin {
  position: relative;
  padding: clamp(3rem, 8vw, 5.5rem) 0;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 40%, var(--bg) 100%);
}

.page-about .about-origin::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--lime-soft) 32%, var(--amber) 68%, transparent);
  opacity: 0.75;
}

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-origin__body p {
  margin: 0 0 1.15rem;
  color: var(--bone);
  line-height: 1.88;
}

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

.page-about .about-origin__side {
  padding: clamp(1.15rem, 3vw, 1.75rem);
  border-left: 3px solid var(--lime);
}

.page-about .about-origin__side-title {
  margin: 0 0 1rem;
  font-family: var(--font-head);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--lime);
}

.page-about .about-origin__side-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.85rem;
}

.page-about .about-origin__side-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.75rem;
  align-items: baseline;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--mint);
}

.page-about .about-origin__side-list .num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--amber);
}

/* ---------- 03 时间轴 ---------- */

.page-about .about-timeline {
  position: relative;
  padding: clamp(3rem, 8vw, 5.5rem) 0;
  background-color: var(--bg);
  background-image: repeating-linear-gradient(
    118deg,
    rgba(31, 58, 48, 0.55) 0 1px,
    transparent 1px 68px
  );
}

.page-about .tl {
  position: relative;
  margin: 0;
  padding: 0 0 0 2.4rem;
  list-style: none;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 0.5rem;
  top: 0.4rem;
  bottom: 0.4rem;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--mint) 6%, var(--lime-soft) 42%, var(--lime) 82%, transparent);
  transform: skewX(-5deg);
  transform-origin: top center;
}

.page-about .tl__item {
  position: relative;
  margin: 0 0 1.65rem;
}

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

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -2.13rem;
  top: 1.55rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--lime);
  z-index: 1;
}

.page-about .tl__meta {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  margin-bottom: 0.55rem;
}

.page-about .tl__year {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--lime);
}

.page-about .tl__stage {
  font-size: 0.74rem;
  letter-spacing: 0.22em;
  color: var(--mint);
}

.page-about .tl__card {
  position: relative;
  padding: clamp(1.05rem, 2.6vw, 1.7rem);
  border-left: 3px solid var(--lime-soft);
}

.page-about .tl__item:nth-child(1) .tl__card { border-left-color: var(--mint); }
.page-about .tl__item:nth-child(2) .tl__card { border-left-color: var(--lime-soft); }
.page-about .tl__item:nth-child(3) .tl__card { border-left-color: var(--lime); }
.page-about .tl__item:nth-child(4) .tl__card { border-left-color: var(--amber); }

.page-about .tl__title {
  margin: 0 0 0.6rem;
  font-family: var(--font-head);
  font-size: clamp(1.1rem, 2.8vw, 1.35rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--bone);
}

.page-about .tl__text {
  margin: 0 0 0.9rem;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--mint);
}

.page-about .tl__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

/* ---------- 04 数据流程 ---------- */

.page-about .about-flow {
  padding: clamp(3rem, 8vw, 5.5rem) 0;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  border-top: 1px solid var(--line);
}

.page-about .about-flow__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .flow {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .flow__step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.4rem 1rem;
  padding: clamp(1rem, 2.6vw, 1.5rem);
  background: var(--panel);
  border: 1px solid var(--line);
  clip-path: var(--cut-sm);
  transition: border-color var(--step), background var(--step);
}

.page-about .flow__step:hover {
  border-color: var(--lime-soft);
  background: var(--bg-2);
}

.page-about .flow__index {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--lime);
}

.page-about .flow__step:nth-child(1) .flow__index { color: var(--mint); }
.page-about .flow__step:nth-child(2) .flow__index { color: var(--lime-soft); }
.page-about .flow__step:nth-child(3) .flow__index { color: var(--lime); }

.page-about .flow__body {
  min-width: 0;
}

.page-about .flow__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-head);
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--bone);
}

.page-about .flow__text {
  margin: 0 0 0.7rem;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--mint);
}

.page-about .flow__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-about .about-flow__figure {
  border: 1px solid var(--line);
  clip-path: var(--cut);
}

.page-about .about-flow__figure img {
  width: 100%;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

/* ---------- 05 南昌现场 ---------- */

.page-about .about-nanchang {
  padding: clamp(3rem, 8vw, 5.5rem) 0;
  background: linear-gradient(180deg, var(--bg) 0%, var(--wine) 52%, var(--bg) 100%);
}

.page-about .about-nanchang__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-nanchang__body p {
  margin: 0 0 1.15rem;
  line-height: 1.88;
  color: var(--bone);
}

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

.page-about .about-nanchang__facts {
  display: grid;
  gap: 0.85rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-nanchang__fact {
  display: grid;
  gap: 0.3rem;
  padding: 1.05rem 1.2rem;
  background: rgba(6, 18, 14, 0.6);
  border: 1px solid rgba(242, 247, 240, 0.14);
  clip-path: var(--cut-sm);
}

.page-about .about-nanchang__fact-num {
  font-family: var(--font-mono);
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-nanchang__fact-unit {
  font-size: 0.55em;
  color: var(--lime-soft);
}

.page-about .about-nanchang__fact-label {
  font-size: 0.86rem;
  letter-spacing: 0.1em;
  color: var(--bone);
}

.page-about .about-nanchang__fact-desc {
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--mint);
}

/* ---------- 06 覆盖与合作 ---------- */

.page-about .about-reach {
  padding: clamp(3rem, 8vw, 5.5rem) 0 0;
  background: var(--bg-2);
}

.page-about .about-reach__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 clamp(1.75rem, 4vw, 2.5rem);
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  clip-path: var(--cut);
}

.page-about .about-reach__stat {
  display: grid;
  gap: 0.3rem;
  align-content: start;
  padding: clamp(1rem, 2.4vw, 1.5rem);
  background: var(--panel);
}

.page-about .about-reach__num {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 5vw, 2.3rem);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-reach__unit {
  font-size: 0.55em;
  color: var(--lime-soft);
}

.page-about .about-reach__label {
  font-size: 0.86rem;
  letter-spacing: 0.1em;
  color: var(--bone);
}

.page-about .about-reach__desc {
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--mint);
}

.page-about .about-reach__services {
  padding: clamp(1.15rem, 3vw, 1.9rem);
  margin-bottom: clamp(2rem, 5vw, 3rem);
  border-left: 3px solid var(--amber);
}

.page-about .about-reach__services-title {
  margin: 0 0 1.15rem;
  font-family: var(--font-head);
  font-size: clamp(1.05rem, 2.6vw, 1.25rem);
  font-weight: 700;
  color: var(--bone);
}

.page-about .about-reach__services-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.15rem;
}

.page-about .about-reach__service p {
  margin: 0.7rem 0 0;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--mint);
}

.page-about .about-reach__banner {
  position: relative;
  margin: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-reach__banner img {
  width: 100%;
  max-height: 46vh;
  object-fit: cover;
}

/* ---------- 07 去向 ---------- */

.page-about .about-next {
  padding: clamp(2.75rem, 7vw, 4.5rem) 0;
  background: var(--bg);
  border-top: 1px solid var(--line);
}

.page-about .about-next__links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  clip-path: var(--cut);
}

.page-about .about-next__links li {
  background: var(--bg-2);
}

.page-about .about-next__links a {
  display: grid;
  gap: 0.35rem;
  padding: 1.15rem 1.25rem;
  font-family: var(--font-head);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--bone);
  text-decoration: none;
  transition: background var(--step), color var(--step);
}

.page-about .about-next__links a::after {
  content: "→";
  font-family: var(--font-mono);
  color: var(--lime);
  transition: transform var(--step);
}

.page-about .about-next__links a:hover {
  background: var(--panel);
}

.page-about .about-next__links a span {
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 400;
  line-height: 1.7;
  color: var(--mint);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-hero__banner .media__caption {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 3;
    padding: clamp(1.5rem, 4vw, 2.5rem);
    font-size: 0.9rem;
    background: linear-gradient(0deg, rgba(6, 18, 14, 0.92), transparent);
  }

  .page-about .about-reach__services-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.75rem;
  }

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

@media (min-width: 900px) {
  .page-about .tl {
    padding-left: 0;
  }

  .page-about .tl::before {
    left: 160px;
    transform: skewX(-3deg);
  }

  .page-about .tl__item {
    display: grid;
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 3.5rem;
    align-items: start;
    margin-bottom: 2.25rem;
  }

  .page-about .tl__item::before {
    left: 155px;
    top: 1.85rem;
  }

  .page-about .tl__meta {
    flex-direction: column;
    align-items: flex-end;
    gap: 0.3rem;
    margin: 0;
    padding-top: 1.45rem;
    text-align: right;
  }

  .page-about .tl__year {
    font-size: 1.45rem;
  }

  .page-about .about-reach__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-next__links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: clamp(2.5rem, 5vw, 4rem);
    align-items: start;
  }

  .page-about .about-flow__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.25rem);
    align-items: start;
  }

  .page-about .about-nanchang__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: clamp(2.25rem, 5vw, 4rem);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .flow__step,
  .page-about .about-next__links a,
  .page-about .about-next__links a::after {
    transition: none;
  }
}