.page-about {
  --about-grid-size: 32px;
  --about-axis: rgba(245, 245, 245, 0.055);
  --about-line: rgba(255, 255, 255, 0.08);
}

/* ========== Hero ========== */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-height) + 40px) 0 80px;
  background: linear-gradient(135deg, var(--color-green) 0%, var(--color-dark) 72%);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--about-axis) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-axis) 1px, transparent 1px);
  background-size: var(--about-grid-size) var(--about-grid-size);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 44%;
  height: 4px;
  background: linear-gradient(90deg, transparent, var(--color-orange) 30%, var(--color-gold));
  transform: skewX(-18deg);
  transform-origin: right top;
  pointer-events: none;
}

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

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 48px;
  margin-top: 24px;
}

.page-about .about-hero__title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4.6vw, 3.4rem);
  line-height: 1.08;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin: 16px 0 20px;
}

.page-about .about-hero__titleSep {
  color: var(--color-orange);
  margin: 0 8px;
}

.page-about .about-hero__lead {
  max-width: 620px;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--color-muted);
}

.page-about .about-hero__lead strong {
  color: var(--color-text);
  font-weight: 600;
}

.page-about .about-hero__right {
  display: flex;
  flex-direction: column;
  gap: 24px;
  justify-content: flex-end;
  align-items: flex-start;
}

.page-about .about-hero__coords {
  display: grid;
  gap: 10px;
  width: 100%;
}

.page-about .about-hero__coord {
  font-family: var(--font-data);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--color-muted);
  text-transform: uppercase;
  border-left: 2px solid var(--color-orange);
  padding-left: 12px;
}

.page-about .about-hero__stamp {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 14px 20px;
  border: 1px solid var(--color-gold);
  background: rgba(255, 215, 0, 0.05);
  transform: skewX(-6deg);
  margin-top: 8px;
}

.page-about .about-hero__stampNum {
  font-family: var(--font-data);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-gold);
  line-height: 1;
}

.page-about .about-hero__stampLabel {
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--color-muted);
  line-height: 1.6;
  text-transform: uppercase;
}

/* ========== 品牌初心 ========== */
.page-about .about-origin {
  background: var(--color-dark);
}

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

.page-about .about-origin__intro {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.page-about .about-origin__item {
  padding: 28px 24px;
  background: rgba(255, 255, 255, 0.03);
  border-top: 1px solid var(--about-line);
  position: relative;
}

.page-about .about-origin__item::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 36px;
  height: 2px;
  background: var(--color-orange);
}

.page-about .about-origin__num {
  font-family: var(--font-data);
  font-size: 2.4rem;
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 109, 0, 0.5);
  line-height: 1.2;
  display: block;
  margin-bottom: 16px;
}

.page-about .about-origin__item h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  color: var(--color-text);
  margin-bottom: 12px;
}

.page-about .about-origin__item p {
  font-size: 0.92rem;
  line-height: 1.9;
  color: var(--color-muted);
  margin: 0;
}

/* ========== 发展里程碑 ========== */
.page-about .about-milestone__head {
  max-width: 720px;
}

.page-about .about-timeline {
  position: relative;
  margin-top: 48px;
  padding-left: 32px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 4px;
  bottom: 16px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-orange), var(--color-green));
  opacity: 0.6;
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 48px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 10px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-dark);
  border: 3px solid var(--color-orange);
  z-index: 1;
}

.page-about .about-timeline__year {
  font-family: var(--font-data);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-orange);
  line-height: 1.1;
  margin-bottom: 12px;
}

.page-about .about-timeline__body {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-left: 3px solid var(--color-orange);
  padding: 20px 22px;
}

.page-about .about-timeline__body h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  letter-spacing: 0.03em;
  color: var(--color-text);
  margin: 12px 0 8px;
}

.page-about .about-timeline__body p {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--color-muted);
  margin: 0;
}

/* ========== 数据覆盖版图 ========== */
.page-about .about-coverage {
  background: linear-gradient(140deg, var(--color-dark) 0%, var(--color-blue) 140%);
}

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

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

.page-about .about-coverage__img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--about-line);
}

.page-about .about-coverage__list {
  display: grid;
  gap: 8px;
}

.page-about .about-coverage__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: rgba(13, 71, 161, 0.5);
  border-left: 3px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}

.page-about .about-coverage__row:hover {
  border-left-color: var(--color-orange);
  background: rgba(13, 71, 161, 0.7);
}

.page-about .about-coverage__league {
  font-family: var(--font-heading);
  font-size: 1rem;
  letter-spacing: 0.05em;
  color: var(--color-text);
}

.page-about .about-coverage__status {
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--color-muted);
  text-transform: uppercase;
  padding: 2px 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.page-about .about-coverage__status.is-live {
  color: var(--color-orange);
  border-color: rgba(255, 109, 0, 0.4);
}

.page-about .about-coverage__more {
  margin: 16px 0 0;
  font-size: 0.85rem;
  color: var(--color-muted);
  border-left: 2px solid var(--color-gold);
  padding-left: 12px;
}

.page-about .about-coverage__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 48px;
}

.page-about .about-coverage__stat {
  padding: 20px 16px;
  text-align: center;
  background: rgba(255, 255, 255, 0.03);
  border-top: 1px solid rgba(255, 109, 0, 0.25);
}

.page-about .about-coverage__statNum {
  font-family: var(--font-data);
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--color-orange);
  line-height: 1.2;
  display: block;
}

.page-about .about-coverage__statLabel {
  font-size: 0.78rem;
  color: var(--color-muted);
  letter-spacing: 0.06em;
}

/* ========== 技术引擎 ========== */
.page-about .about-engine__grid {
  display: grid;
  gap: 40px;
}

.page-about .about-engine__feature {
  display: flex;
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-engine__feature:first-of-type {
  padding-top: 0;
}

.page-about .about-engine__featureNum {
  font-family: var(--font-data);
  font-size: 0.8rem;
  color: var(--color-orange);
  border: 1px solid rgba(255, 109, 0, 0.35);
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-about .about-engine__feature h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  letter-spacing: 0.03em;
  color: var(--color-text);
  margin-bottom: 8px;
}

.page-about .about-engine__feature p {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--color-muted);
  margin: 0;
}

.page-about .about-engine__visual {
  position: relative;
  align-self: center;
}

.page-about .about-engine__img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--about-line);
}

.page-about .about-engine__signal {
  position: absolute;
  left: 16px;
  bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: rgba(11, 26, 11, 0.75);
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--color-success);
  border: 1px solid rgba(76, 175, 80, 0.35);
}

.page-about .about-engine__signalDot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-success);
  animation: about-pulse 2s ease-in-out infinite;
}

@keyframes about-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.8); }
}

/* ========== 福建稳定版记事 ========== */
.page-about .about-fujian__grid {
  display: grid;
  gap: 40px;
}

.page-about .about-fujian__img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--about-line);
}

.page-about .about-fujian__content .tag {
  display: inline-block;
  margin-bottom: 12px;
}

.page-about .about-fujian__list {
  list-style: none;
  margin: 24px 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-fujian__list li {
  position: relative;
  padding-left: 22px;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--color-text);
}

.page-about .about-fujian__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 12px;
  height: 2px;
  background: var(--color-orange);
}

.page-about .about-fujian__note {
  margin-top: 24px;
  padding: 20px 22px;
  background: rgba(255, 215, 0, 0.04);
  border-left: 3px solid var(--color-gold);
}

.page-about .about-fujian__note p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--color-muted);
}

/* ========== 团队与生态 ========== */
.page-about .about-ecosystem__grid {
  display: grid;
  gap: 24px;
  margin-top: 40px;
}

.page-about .about-ecosystem__card {
  padding: 28px 24px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--about-line);
}

.page-about .about-ecosystem__card h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  letter-spacing: 0.05em;
  color: var(--color-text);
  margin: 0 0 18px;
  padding-left: 12px;
  border-left: 3px solid var(--color-orange);
}

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

.page-about .about-ecosystem__card li {
  position: relative;
  padding-left: 16px;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--color-muted);
}

.page-about .about-ecosystem__card li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--color-orange);
}

.page-about .about-ecosystem__footer {
  margin-top: 48px;
  padding: 32px;
  border: 1px solid var(--about-line);
  background: rgba(255, 255, 255, 0.02);
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: flex-start;
}

.page-about .about-ecosystem__footer p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--color-text);
  max-width: 760px;
}

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

.page-about .about-ecosystem__links {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--about-line);
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  font-size: 0.85rem;
}

.page-about .about-ecosystem__links a {
  color: var(--color-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.page-about .about-ecosystem__links a:hover {
  color: var(--color-orange);
  border-bottom-color: var(--color-orange);
}

.page-about .about-ecosystem__linksLabel {
  font-family: var(--font-data);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-gold);
  margin-right: 8px;
}

/* ========== 响应式 ========== */
@media (min-width: 768px) {
  .page-about .about-origin__grid {
    grid-template-columns: 1fr 1fr;
  }

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

  .page-about .about-coverage__grid {
    grid-template-columns: 1.1fr 1fr;
    gap: 40px;
  }

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

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

  .page-about .about-ecosystem__footer {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

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

  .page-about .about-timeline::before {
    left: 140px;
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 32px;
  }

  .page-about .about-timeline__item::before {
    left: 134px;
  }

  .page-about .about-timeline__year {
    margin-bottom: 0;
    text-align: right;
    padding-right: 24px;
    padding-top: 8px;
  }
}

@media (min-width: 992px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.3fr 1fr;
    align-items: end;
  }

  .page-about .about-origin__grid {
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 48px;
  }

  .page-about .about-origin__intro {
    grid-column: auto;
  }

  .page-about .about-engine__grid {
    grid-template-columns: 1.2fr 1fr;
    gap: 64px;
  }

  .page-about .about-fujian__grid {
    grid-template-columns: 1fr 1.2fr;
    gap: 64px;
    align-items: center;
  }

  .page-about .about-ecosystem__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
  }
}