/* ============ PAGE ABOUT ============ */
.page-about {
  --about-line: rgba(168, 178, 193, 0.28);
  --about-glow: rgba(57, 255, 20, 0.12);
  --about-orange-soft: rgba(230, 126, 34, 0.12);
  background: var(--color-bg);
  color: var(--color-silver-bright);
  overflow-x: hidden;
}

/* ---------- 通用区块标题 ---------- */
.page-about .about-heading {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--color-silver-bright);
  margin: 8px 0 0;
}

.page-about .rotate-label--section {
  margin-left: 8px;
}

/* ---------- 首屏 hero ---------- */
.page-about .about-hero {
  position: relative;
  padding: 24px 0 40px;
  background: var(--color-bg-deep);
  isolation: isolate;
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}

.page-about .about-hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.32;
}

.page-about .about-hero__veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(5, 13, 26, 0.4) 0%, rgba(10, 26, 47, 0.82) 100%),
    linear-gradient(90deg, rgba(5, 13, 26, 0.62) 0%, rgba(10, 26, 47, 0.18) 55%, rgba(5, 13, 26, 0.5) 100%);
}

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

.page-about .about-breadcrumb {
  margin-bottom: 28px;
}

.page-about .about-hero__meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
}

.page-about .about-hero__code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--color-silver);
  border: 1px solid var(--about-line);
  padding: 4px 10px;
  text-transform: uppercase;
  white-space: nowrap;
}

.page-about .about-hero__titlewrap {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-start;
}

.page-about .about-hero__heading {
  position: relative;
  background: linear-gradient(135deg, rgba(5, 13, 26, 0.88) 0%, rgba(10, 26, 47, 0.42) 100%);
  padding: 20px 20px 22px;
  border: 1px solid rgba(57, 255, 20, 0.18);
  border-left: 5px solid var(--color-neon);
  max-width: 1020px;
}

.page-about .about-hero__title {
  font-size: clamp(32px, 8vw, 58px);
  line-height: 1.06;
  max-width: 900px;
  margin: 10px 0 0;
}

.page-about .about-hero__lead {
  max-width: 760px;
  margin: 24px 0 0;
}

.page-about .about-preview {
  display: grid;
  grid-template-columns: 1fr;
  margin-top: 44px;
  border-top: 2px solid var(--color-neon);
  border-bottom: 1px solid var(--about-line);
  background: rgba(10, 26, 47, 0.58);
}

.page-about .about-preview .chapter-preview__item {
  border-right: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
  padding: 18px 16px;
  transition: background 0.25s ease, border-color 0.25s ease;
}

.page-about .about-preview .chapter-preview__item:last-child {
  border-bottom: none;
}

.page-about .about-preview .chapter-preview__item:hover {
  background: rgba(57, 255, 20, 0.06);
  border-color: rgba(57, 255, 20, 0.35);
}

/* ---------- 01 平台起源与发展 ---------- */
.page-about .about-origin {
  position: relative;
}

.page-about .about-origin__grid {
  display: grid;
  gap: 32px;
  margin-top: 40px;
}

.page-about .about-origin__copy {
  max-width: 680px;
}

.page-about .about-origin__lead {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 20px;
  line-height: 1.5;
  color: var(--color-silver-bright);
  border-left: 4px solid var(--color-neon);
  padding-left: 16px;
  margin-bottom: 20px;
}

.page-about .about-origin__copy p {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-silver);
  margin-bottom: 16px;
}

.page-about .about-origin__stream {
  margin-top: 24px;
  height: 28px;
}

.page-about .about-origin__panel {
  position: relative;
  padding: 28px 24px;
  background:
    linear-gradient(135deg, var(--about-glow) 0%, transparent 45%),
    var(--color-bg-elev);
  border: 1px solid var(--about-line);
  border-left: 4px solid var(--color-neon);
  max-width: 400px;
  margin-left: auto;
}

.page-about .about-origin__num {
  display: block;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 32px;
  line-height: 1.1;
  color: var(--color-neon);
  margin: 6px 0 16px;
}

.page-about .about-origin__divider {
  display: block;
  width: 100%;
  height: 1px;
  background: var(--about-line);
  margin-bottom: 16px;
}

.page-about .about-origin__note {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-silver);
  border-top: 1px dashed var(--about-line);
  padding-top: 16px;
  margin-top: 8px;
}

/* ---------- 02 数据规模与覆盖 ---------- */
.page-about .about-data {
  background: linear-gradient(180deg, var(--color-bg-deep) 0%, var(--color-bg) 100%);
}

.page-about .about-data__grid {
  display: grid;
  gap: 28px;
  margin-top: 40px;
}

.page-about .about-data__map {
  position: relative;
  border: 1px solid var(--about-line);
  background: var(--color-bg-elev);
  padding: 12px;
}

.page-about .about-data__img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  filter: contrast(1.05) saturate(1.1);
  transition: filter 0.3s ease, transform 0.3s ease;
}

.page-about .about-data__img:hover {
  filter: contrast(1.12) saturate(1.15) brightness(1.05);
}

.page-about .about-data__mapnote {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 8px 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-silver);
}

.page-about .about-data__mapnote p {
  margin: 0;
  line-height: 1.5;
}

.page-about .about-data__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.page-about .about-data__card {
  padding: 20px 18px;
  background: var(--color-bg-elev);
  border: 1px solid var(--about-line);
  border-top: 3px solid var(--color-neon);
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-about .about-data__card:hover {
  border-color: rgba(57, 255, 20, 0.55);
  background: rgba(57, 255, 20, 0.04);
}

.page-about .about-stat__num {
  display: inline-block;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1;
  color: var(--color-neon);
  margin-top: 8px;
}

.page-about .about-stat__unit {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-silver);
  margin-left: 4px;
}

.page-about .about-data__card p {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-silver);
  margin: 10px 0 0;
}

.page-about .about-data__band {
  margin-top: 32px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  padding: 22px 24px;
  background: var(--color-bg-deep);
  border: 1px solid rgba(57, 255, 20, 0.28);
  border-left: 6px solid var(--color-neon);
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-silver);
}

.page-about .about-data__band-label {
  font-weight: 700;
  color: var(--color-silver-bright);
  letter-spacing: 0.02em;
}

.page-about .about-data__band-item {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
}

.page-about .about-data__band strong {
  color: var(--color-neon);
  font-size: 22px;
  font-family: var(--font-head);
  font-weight: 900;
}

/* ---------- 03 服务能力与团队 ---------- */
.page-about .about-service__grid {
  display: grid;
  gap: 32px;
  margin-top: 40px;
}

.page-about .about-service__lead {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.55;
  color: var(--color-silver-bright);
  margin-bottom: 20px;
}

.page-about .about-team__list {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  border-top: 1px solid var(--about-line);
}

.page-about .about-team__item {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-team__role {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 16px;
  color: var(--color-neon);
}

.page-about .about-team__desc {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-silver);
}

.page-about .about-service__copy > p {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-silver);
  margin-bottom: 16px;
}

.page-about .about-service__stream {
  margin-top: 24px;
  height: 24px;
}

.page-about .about-service__media {
  position: relative;
  border: 1px solid var(--about-line);
  background: var(--color-bg-elev);
  align-self: start;
}

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

.page-about .about-service__tag {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--color-bg-deep);
  border-top: 1px solid var(--about-line);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-silver);
}

.page-about .about-service__tag-label {
  background: var(--color-neon);
  color: var(--color-bg-deep);
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 13px;
  padding: 2px 8px;
  border-radius: 2px;
}

/* ---------- 04 发展历程时间轴 ---------- */
.page-about .about-timeline {
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-deep) 120%);
}

.page-about .about-timeline__track {
  position: relative;
  margin-top: 48px;
}

.page-about .about-timeline__track::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-neon) 0%, var(--color-neon-dim) 40%, var(--color-silver) 100%);
  opacity: 0.45;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 32px 56px;
}

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

.page-about .about-timeline__mark {
  position: absolute;
  left: 8px;
  top: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 3px solid var(--color-neon);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-neon);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  box-shadow: 0 0 0 4px rgba(57, 255, 20, 0.15);
}

.page-about .about-timeline__body {
  background: var(--color-bg-elev);
  border: 1px solid var(--about-line);
  border-left: 4px solid var(--color-neon);
  padding: 20px;
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

.page-about .about-timeline__body:hover {
  border-color: rgba(57, 255, 20, 0.5);
  box-shadow: 0 8px 28px rgba(5, 13, 26, 0.4);
}

.page-about .about-timeline__period {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-orange);
  display: inline-block;
  background: var(--about-orange-soft);
  padding: 3px 8px;
  border: 1px solid rgba(230, 126, 34, 0.3);
  margin-bottom: 10px;
}

.page-about .about-timeline__body h3 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 20px;
  color: var(--color-silver-bright);
  margin: 0 0 8px;
}

.page-about .about-timeline__body p {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-silver);
  margin: 0;
}

/* ---------- 05 合作与服务生态 ---------- */
.page-about .about-eco__grid {
  display: grid;
  gap: 20px;
  margin-top: 40px;
}

.page-about .about-eco__item {
  padding: 24px;
  background: var(--color-bg-elev);
  border: 1px solid var(--about-line);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.page-about .about-eco__item:hover {
  transform: translateY(-4px);
  border-color: rgba(57, 255, 20, 0.45);
  box-shadow: 0 8px 24px rgba(5, 13, 26, 0.5);
}

.page-about .about-eco__badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--color-neon);
  border: 1px solid rgba(57, 255, 20, 0.4);
  background: rgba(57, 255, 20, 0.05);
  padding: 2px 10px;
  margin-bottom: 14px;
}

.page-about .about-eco__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 18px;
  margin: 0 0 8px;
  color: var(--color-silver-bright);
}

.page-about .about-eco__desc {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-silver);
  margin: 0;
}

.page-about .about-eco__cta {
  margin-top: 32px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  background: rgba(57, 255, 20, 0.06);
  border: 1px solid rgba(57, 255, 20, 0.32);
}

.page-about .about-eco__cta-copy p {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 18px;
  margin: 4px 0 0;
  color: var(--color-silver-bright);
}

.page-about .about-eco__cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .chapter-preview__item:focus-visible,
.page-about .about-eco__item:focus-within,
.page-about .btn:focus-visible {
  outline: 2px solid var(--color-neon);
  outline-offset: 2px;
}

/* ---------- 768px 以上 ---------- */
@media (min-width: 768px) {

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(300px, 1fr);
    align-items: start;
  }

  .page-about .about-data__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(300px, 1fr);
    align-items: stretch;
  }

  .page-about .about-service__grid {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 0.85fr);
    align-items: start;
  }

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

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

  .page-about .about-preview .chapter-preview__item:nth-child(3n) {
    border-right: none;
  }

  .page-about .about-preview .chapter-preview__item:nth-child(4),
  .page-about .about-preview .chapter-preview__item:nth-child(5) {
    border-bottom: none;
  }
}

/* ---------- 1024px 以上 ---------- */
@media (min-width: 1024px) {

  .page-about .about-hero {
    padding: 48px 0 56px;
  }

  .page-about .about-hero__titlewrap {
    flex-direction: row;
    gap: 36px;
    align-items: flex-end;
  }

  .page-about .about-hero__title {
    font-size: 58px;
  }

  .page-about .about-preview {
    grid-template-columns: repeat(5, 1fr);
  }

  .page-about .about-preview .chapter-preview__item {
    border-bottom: none;
  }

  .page-about .about-preview .chapter-preview__item:nth-child(3n) {
    border-right: 1px solid var(--about-line);
  }

  .page-about .about-preview .chapter-preview__item:nth-child(5) {
    border-right: none;
  }

  .page-about .about-data__band {
    padding: 28px 32px;
  }

  .page-about .about-timeline__body {
    max-width: 720px;
  }

  .page-about .about-timeline__item:nth-child(2n) .about-timeline__body {
    margin-left: 64px;
  }

  .page-about .about-timeline__item:nth-child(2n) .about-timeline__mark {
    left: 16px;
  }

  .page-about .about-eco__cta {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding: 28px 32px;
  }
}