.page-about {
  --about-orange: #FFB800;
  --about-blue: #00D4FF;
  --about-deep: #061524;
  --about-panel: #0F2A47;
  background: #0A1F33;
}

/* ============ 首屏：品牌故事与数字统计 ============ */
.page-about .about-hero {
  position: relative;
  padding: 40px 0 0;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 400px;
  background:
    radial-gradient(ellipse at 85% 0%, rgba(0, 212, 255, 0.14), transparent 62%),
    radial-gradient(ellipse at 5% 100%, rgba(255, 184, 0, 0.1), transparent 55%);
  pointer-events: none;
  z-index: 0;
}

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

.page-about .about-hero .breadcrumb {
  margin-bottom: 32px;
}

.page-about .about-hero-grid {
  display: grid;
  gap: 36px;
  margin-bottom: 36px;
}

.page-about .about-hero-copy .kicker {
  color: var(--about-blue);
}

.page-about .about-hero-title {
  font-family: var(--font-head);
  font-size: clamp(2.5rem, 5.2vw + 0.8rem, 4.4rem);
  line-height: 1.02;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin: 10px 0 8px;
  color: var(--text-main);
}

.page-about .about-hero-lead {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--about-orange);
  margin-bottom: 16px;
}

.page-about .about-hero-desc {
  color: var(--text-sub);
  max-width: 640px;
  line-height: 1.75;
  font-size: 1.05rem;
}

.page-about .about-hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 26px;
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 0;
}

.page-about .about-stat {
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: rgba(15, 42, 71, 0.72);
  padding: 18px 16px 16px;
  position: relative;
  backdrop-filter: blur(8px);
}

.page-about .about-stat::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 44px;
  height: 3px;
  background: linear-gradient(90deg, var(--about-orange), var(--about-blue));
}

.page-about .about-stat dt {
  color: var(--text-sub);
  font-size: var(--text-small);
  letter-spacing: 0.14em;
  margin-bottom: 10px;
}

.page-about .about-stat dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 2.25rem;
  font-weight: 500;
  color: var(--about-orange);
  line-height: 1;
}

.page-about .about-hero-visual {
  position: relative;
  margin: 0;
  height: 340px;
  overflow: hidden;
}

.page-about .about-hero-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(10, 31, 51, 0.62), rgba(10, 31, 51, 0.2) 30%, rgba(10, 31, 51, 0.88));
  z-index: 1;
}

.page-about .about-hero-visual::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--about-orange), var(--about-blue), var(--about-orange));
  z-index: 2;
}

.page-about .about-hero-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.88) contrast(1.06);
}

/* ============ 01 品牌起点 ============ */
.page-about .about-origin {
  background: var(--about-deep);
  padding: 64px 0;
  position: relative;
}

.page-about .about-origin::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 42%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--about-blue));
}

.page-about .about-origin-grid {
  display: grid;
  gap: 28px;
}

.page-about .about-origin-head .coord-num {
  display: block;
  margin-bottom: 8px;
}

.page-about .about-origin-head .kicker {
  color: var(--about-orange);
  margin-bottom: 6px;
}

.page-about .about-origin-head h2,
.page-about .about-timeline-head h2,
.page-about .about-team-copy h2,
.page-about .about-cert-head h2,
.page-about .about-eco-main h2 {
  font-family: var(--font-head);
  font-size: var(--text-h2);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-main);
  margin: 0;
}

.page-about .about-origin-body {
  color: var(--text-sub);
  line-height: 1.8;
  font-size: 1rem;
}

.page-about .about-origin-body p:first-child {
  margin-top: 0;
}

.page-about .about-origin-points {
  list-style: none;
  margin: 24px 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-origin-points li {
  position: relative;
  padding-left: 18px;
  border-left: 2px solid var(--about-orange);
}

.page-about .about-origin-points strong {
  color: var(--text-main);
}

.page-about .about-origin-body .btn-ghost {
  margin-top: 8px;
}

/* ============ 02 关键里程碑 ============ */
.page-about .about-timeline {
  background: var(--bg-main);
  padding: 64px 0;
}

.page-about .about-timeline-head {
  margin-bottom: 40px;
}

.page-about .about-timeline-head .coord-num {
  display: block;
  margin-bottom: 8px;
}

.page-about .about-timeline-head .kicker {
  color: var(--about-blue);
  margin-bottom: 6px;
}

.page-about .about-timeline-head > p {
  color: var(--text-sub);
  max-width: 620px;
  line-height: 1.7;
  margin-top: 12px;
}

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

.page-about .about-timeline-list::before {
  content: "";
  position: absolute;
  left: 24px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--about-orange), var(--about-blue), rgba(0, 212, 255, 0.1));
}

.page-about .timeline-item {
  position: relative;
  padding: 0 0 30px 76px;
}

.page-about .timeline-year {
  position: absolute;
  left: 0;
  top: 0;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--about-deep);
  border: 2px solid var(--about-orange);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--about-orange);
  box-shadow: 0 0 14px rgba(255, 184, 0, 0.32);
  z-index: 1;
}

.page-about .timeline-card {
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: rgba(15, 42, 71, 0.55);
  padding: 18px 18px 16px;
  position: relative;
  backdrop-filter: blur(6px);
  transition: transform var(--speed), border-color var(--speed);
}

.page-about .timeline-card:hover {
  transform: translateX(4px);
  border-color: var(--about-blue);
}

.page-about .timeline-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-main);
  margin: 0 0 8px;
}

.page-about .timeline-card p {
  color: var(--text-sub);
  line-height: 1.65;
  margin: 0;
  font-size: 0.95rem;
}

/* ============ 03 团队构成 ============ */
.page-about .about-team {
  background: var(--about-panel);
  padding: 64px 0;
  position: relative;
}

.page-about .about-team::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 70%;
  height: 1px;
  background: linear-gradient(90deg, var(--about-blue), transparent);
  pointer-events: none;
}

.page-about .about-team-grid {
  display: grid;
  gap: 36px;
}

.page-about .about-team-copy {
  position: relative;
}

.page-about .about-team-copy .coord-num {
  display: block;
  margin-bottom: 8px;
}

.page-about .about-team-copy .kicker {
  color: var(--about-orange);
  margin-bottom: 6px;
}

.page-about .about-team-intro {
  color: var(--text-sub);
  line-height: 1.75;
  margin: 16px 0 24px;
}

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

.page-about .team-entry {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  border: 1px solid rgba(30, 58, 95, 0.9);
  border-radius: var(--radius);
  background: rgba(10, 31, 51, 0.5);
  padding: 18px 18px 16px;
  transition: transform var(--speed), border-color var(--speed);
}

.page-about .team-entry:hover {
  transform: translateY(-3px);
  border-color: var(--about-blue);
}

.page-about .team-count {
  font-family: var(--font-mono);
  font-size: 2.25rem;
  font-weight: 500;
  color: var(--about-orange);
  line-height: 1;
  min-width: 56px;
  position: relative;
}

.page-about .team-entry h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 2px 0 6px;
}

.page-about .team-entry p {
  color: var(--text-sub);
  font-size: 0.92rem;
  line-height: 1.6;
  margin: 0;
}

.page-about .about-team-visual {
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
}

.page-about .about-team-visual::before {
  content: "";
  position: absolute;
  inset: 0 0 0 auto;
  width: 8px;
  background: linear-gradient(to bottom, var(--about-orange), var(--about-blue));
  z-index: 2;
}

.page-about .about-team-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-about .about-team-visual p {
  color: var(--text-sub);
  font-size: 0.88rem;
  line-height: 1.6;
  padding: 14px 8px 6px;
  margin: 0;
}

/* ============ 04 资质与认证 ============ */
.page-about .about-cert {
  background: var(--bg-paper);
  color: var(--bg-main);
  padding: 64px 0;
  position: relative;
}

.page-about .about-cert .about-cert-head {
  margin-bottom: 36px;
}

.page-about .about-cert .coord-num {
  color: transparent;
  -webkit-text-stroke: 2px rgba(10, 31, 51, 0.55);
  display: block;
  margin-bottom: 8px;
}

.page-about .about-cert .kicker {
  color: rgba(10, 31, 51, 0.6);
  margin-bottom: 6px;
}

.page-about .about-cert h2 {
  color: var(--bg-main);
}

.page-about .about-cert-head p {
  color: rgba(10, 31, 51, 0.72);
  line-height: 1.7;
  margin: 14px 0 0;
  max-width: 640px;
}

.page-about .about-cert-grid {
  display: grid;
  gap: 18px;
}

.page-about .cert-card {
  background: #ffffff;
  border: 1px solid rgba(10, 31, 51, 0.12);
  border-radius: var(--radius);
  padding: 26px 22px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 26px rgba(10, 31, 51, 0.1);
}

.page-about .cert-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  height: 4px;
  width: 72px;
  background: linear-gradient(90deg, var(--about-orange), var(--about-blue));
}

.page-about .cert-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--bg-main);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.page-about .cert-icon span {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.08em;
  color: var(--about-orange);
}

.page-about .cert-card h3 {
  font-family: var(--font-head);
  font-size: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin: 0 0 8px;
  color: var(--bg-main);
}

.page-about .cert-card p {
  color: rgba(10, 31, 51, 0.72);
  font-size: 0.92rem;
  line-height: 1.65;
  margin: 0;
}

.page-about .cert-visual {
  background: rgba(10, 31, 51, 0.06);
  border-radius: var(--radius);
  padding: 18px;
  text-align: center;
}

.page-about .cert-visual img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: calc(var(--radius) - 2px);
}

.page-about .cert-visual p {
  color: rgba(10, 31, 51, 0.6);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  margin: 14px 0 0;
}

/* ============ 05 合作生态 ============ */
.page-about .about-eco {
  background: var(--about-deep);
  padding: 64px 0;
  position: relative;
}

.page-about .about-eco::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--about-orange), var(--about-blue), transparent);
}

.page-about .about-eco-grid {
  display: grid;
  gap: 36px;
}

.page-about .about-eco-main .coord-num {
  display: block;
  margin-bottom: 8px;
}

.page-about .about-eco-main .kicker {
  color: var(--about-blue);
  margin-bottom: 6px;
}

.page-about .about-eco-main > p {
  color: var(--text-sub);
  line-height: 1.75;
  margin: 0 0 14px;
}

.page-about .about-eco-main .btn {
  margin-top: 10px;
}

.page-about .about-eco-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: rgba(15, 42, 71, 0.65);
  overflow: hidden;
}

.page-about .about-eco-list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-main);
  font-size: 0.95rem;
}

.page-about .about-eco-list li:last-child {
  border-bottom: none;
}

.page-about .about-eco-list .num {
  font-size: 1.75rem;
  color: var(--about-orange);
  font-weight: 500;
}

.page-about .about-trust {
  margin: 40px 0 0;
  padding: 22px 24px;
  border-radius: var(--radius);
  background: rgba(0, 212, 255, 0.08);
  border-left: 4px solid var(--about-blue);
}

.page-about .about-trust p {
  margin: 0;
  color: var(--text-main);
  line-height: 1.75;
  font-size: 0.98rem;
}

/* ============ 交互显现 ============ */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.page-about [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ============ 桌面端增强 ============ */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding-top: 56px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: center;
    gap: 60px;
  }

  .page-about .about-hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

  .page-about .about-hero-visual {
    height: 460px;
  }

  .page-about .about-origin {
    padding: 88px 0;
  }

  .page-about .about-origin-grid {
    grid-template-columns: 0.45fr 1.55fr;
    gap: 56px;
  }

  .page-about .about-origin-points {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }

  .page-about .about-timeline {
    padding: 88px 0;
  }

  .page-about .about-timeline-head {
    display: grid;
    grid-template-columns: 0.45fr 1.55fr;
    gap: 56px;
    align-items: end;
  }

  .page-about .about-timeline-head > p {
    margin: 0 0 8px;
  }

  .page-about .about-timeline-list {
    max-width: 840px;
    margin: 0 auto;
  }

  .page-about .timeline-item {
    padding-left: 110px;
  }

  .page-about .timeline-year {
    width: 56px;
    height: 56px;
    font-size: 13px;
  }

  .page-about .timeline-card {
    padding: 24px 30px;
  }

  .page-about .about-team {
    padding: 88px 0;
  }

  .page-about .about-team-grid {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 56px;
    align-items: center;
  }

  .page-about .about-team-list {
    grid-template-columns: 1fr;
  }

  .page-about .about-cert {
    padding: 88px 0;
  }

  .page-about .about-cert-head {
    display: grid;
    grid-template-columns: 0.45fr 1.55fr;
    gap: 56px;
    align-items: end;
  }

  .page-about .about-cert-head p {
    margin: 0 0 6px;
  }

  .page-about .about-cert-grid {
    grid-template-columns: 1fr 1fr 0.8fr;
    gap: 22px;
    align-items: stretch;
  }

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

  .page-about .about-eco {
    padding: 88px 0;
  }

  .page-about .about-eco-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
  }

  .page-about .about-trust {
    max-width: 760px;
    margin-left: 0;
    margin-top: 44px;
  }
}

@media (max-width: 380px) {
  .page-about .about-hero-stats {
    grid-template-columns: 1fr;
  }

  .page-about .about-stat {
    padding: 16px 14px;
  }

  .page-about .about-stat dd {
    font-size: 1.9rem;
  }
}