.page-about {
  --about-line-lime: rgba(198, 255, 0, 0.34);
  --about-line-blue: rgba(0, 229, 255, 0.2);
  --about-card-bg: rgba(10, 38, 30, 0.72);
  --about-deep-bg: #071F17;
  background:
    radial-gradient(900px 380px at 92% -4%, rgba(0, 229, 255, 0.12), transparent 62%),
    radial-gradient(760px 320px at -10% 28%, rgba(198, 255, 0, 0.07), transparent 60%),
    var(--green-deep);
}

.page-about .about-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

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

.page-about section[id],
.page-about .trust-section {
  scroll-margin-top: calc(var(--header-h) + 18px);
}

/* ---------- 首屏：品牌声明 + 数据快照 ---------- */
.page-about .about-hero {
  display: grid;
  gap: 30px;
  margin-bottom: 32px;
}

.page-about .about-hero-copy {
  padding: 20px 0 0;
}

.page-about .about-title {
  margin: 16px 0 18px;
  font-size: 2rem;
  line-height: 1.18;
  color: var(--paper);
  font-weight: 700;
  letter-spacing: 0.01em;
}

.page-about .about-lead {
  max-width: 44em;
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.85;
  color: rgba(245, 241, 232, 0.82);
}

.page-about .about-lead strong {
  color: var(--green-lime);
  font-weight: 500;
}

.page-about .about-hero-certs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .hero-cert {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px 6px 14px;
  border-left: 3px solid var(--blue-neon);
  background: rgba(0, 58, 74, 0.5);
  color: var(--paper);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.page-about .about-hero-stats {
  position: relative;
  padding: 24px 22px;
  background: var(--about-card-bg);
  border: 1px solid rgba(198, 255, 0, 0.28);
  border-radius: 8px 24px 8px 24px;
  transform: rotate(0.4deg);
}

.page-about .stats-kicker {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--blue-neon);
}

.page-about .stats-list {
  display: grid;
  gap: 14px;
  margin: 0;
}

.page-about .stat-block {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px dashed rgba(229, 231, 230, 0.2);
  padding-bottom: 10px;
}

.page-about .stat-block dt {
  font-size: 0.78rem;
  color: rgba(245, 241, 232, 0.7);
}

.page-about .stat-num {
  font-family: var(--font-head);
  font-size: 1.65rem;
  font-weight: 700;
  line-height: 1;
  color: var(--green-lime);
}

/* ---------- 页内章节轨道 ---------- */
.page-about .about-rail {
  display: flex;
  flex-wrap: nowrap;
  gap: 10px;
  margin: 14px 0 52px;
  padding-bottom: 6px;
  overflow-x: auto;
}

.page-about .about-rail a {
  flex: 0 0 auto;
  padding: 8px 14px;
  background: rgba(11, 61, 46, 0.5);
  border: 1px solid var(--about-line-lime);
  border-radius: 4px 12px 4px 12px;
  color: var(--paper);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.page-about .about-rail a:hover,
.page-about .about-rail a:focus-visible {
  background: rgba(198, 255, 0, 0.12);
  border-color: var(--green-lime);
}

/* ---------- 章节头部 ---------- */
.page-about .section {
  padding-bottom: 48px;
}

.page-about .section-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 28px;
}

.page-about .section-index {
  flex: 0 0 auto;
  font-family: var(--font-head);
  font-size: 2.3rem;
  font-weight: 700;
  line-height: 1;
  color: var(--green-lime);
  opacity: 0.88;
}

.page-about .section-index--dark {
  color: var(--green-deep);
}

.page-about .about-h2 {
  margin: 2px 0 6px;
  font-size: 1.5rem;
  line-height: 1.25;
  color: var(--paper);
}

.page-about .section-desc {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.65;
  color: rgba(245, 241, 232, 0.72);
}

.page-about .editorial-section .about-h2,
.page-about .cert-section .about-h2 {
  color: var(--ink);
}

.page-about .editorial-section .section-desc,
.page-about .cert-section .section-desc {
  color: rgba(11, 11, 15, 0.72);
}

.page-about .editorial-section,
.page-about .cert-section {
  padding-bottom: 56px;
  border-radius: 24px 0 24px 0;
}

/* ---------- 01 品牌起源 ---------- */
.page-about .origin-grid {
  display: grid;
  gap: 26px;
  align-items: center;
}

.page-about .origin-copy p {
  margin: 0 0 14px;
  line-height: 1.85;
}

.page-about .origin-copy ul {
  margin: 18px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--about-line-lime);
}

.page-about .origin-copy li {
  position: relative;
  margin-bottom: 10px;
  padding-left: 18px;
  font-size: 0.88rem;
  line-height: 1.6;
}

.page-about .origin-copy li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 9px;
  height: 2px;
  background: var(--green-lime);
  transform: skewX(-30deg);
}

.page-about .origin-figure {
  margin: 0;
}

.page-about .origin-figure .img-frame {
  border: 1px solid rgba(0, 229, 255, 0.25);
  border-radius: 8px 28px 8px 28px;
}

.page-about .origin-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.05);
}

.page-about .origin-figure figcaption {
  margin-top: 10px;
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-align: right;
  color: rgba(245, 241, 232, 0.6);
}

/* ---------- 02 数据编审体系 ---------- */
.page-about .editorial-flow {
  display: grid;
  gap: 18px;
  margin-bottom: 24px;
}

.page-about .flow-panel {
  position: relative;
  padding: 24px 20px 22px;
  background: var(--paper);
  border-radius: 8px 24px 8px 24px;
  border-top: 4px solid var(--green-deep);
  box-shadow: 0 8px 24px rgba(11, 11, 15, 0.14);
}

.page-about .flow-panel--check {
  border-top-color: var(--blue-neon);
}

.page-about .flow-panel--review {
  border-top-color: var(--green-lime);
}

.page-about .flow-step {
  display: inline-block;
  margin-bottom: 12px;
  padding: 4px 10px;
  background: rgba(26, 92, 71, 0.12);
  color: var(--green-mid);
  font-family: var(--font-head);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  transform: skewX(-8deg);
}

.page-about .flow-panel h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 1.25rem;
  color: var(--ink);
}

.page-about .flow-panel p {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.75;
  color: rgba(11, 11, 15, 0.78);
}

.page-about .editorial-banner {
  position: relative;
  height: 200px;
  overflow: hidden;
  border-radius: 8px 28px 8px 28px;
}

.page-about .editorial-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.1);
}

.page-about .editorial-banner-copy {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 12px;
  padding: 14px 16px;
  background: rgba(7, 31, 23, 0.86);
  border-left: 4px solid var(--blue-neon);
}

.page-about .editorial-banner-copy p {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.8;
  color: var(--paper);
}

/* ---------- 03 发展里程碑 ---------- */
.page-about .timeline-section {
  position: relative;
}

.page-about .timeline-wrap {
  position: relative;
  padding: 30px 0 10px;
  clip-path: polygon(0 0, 100% 1.5%, 100% 98.5%, 0 100%);
}

.page-about .timeline-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 24px 0 24px 0;
  filter: saturate(0.8);
  opacity: 0.1;
  pointer-events: none;
}

.page-about .timeline {
  position: relative;
  max-width: 900px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 6px 1fr;
  gap: 0 14px;
  padding: 0 0 34px;
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 12px;
  bottom: -6px;
  width: 2px;
  background: linear-gradient(to bottom, var(--green-lime), rgba(198, 255, 0, 0.07));
}

.page-about .timeline-item:last-child::before {
  display: none;
}

.page-about .timeline-dot {
  position: relative;
  z-index: 1;
  width: 13px;
  height: 13px;
  margin: 7px auto 0;
  border-radius: 2px;
  background: var(--green-lime);
  box-shadow: 0 0 0 4px rgba(198, 255, 0, 0.16), 0 0 14px rgba(198, 255, 0, 0.5);
  transform: rotate(45deg);
}

.page-about .timeline-year {
  grid-column: 2;
  margin-bottom: 6px;
  font-family: var(--font-head);
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1;
  color: var(--green-lime);
}

.page-about .timeline-body {
  grid-column: 2;
  padding: 14px 16px;
  background: rgba(7, 31, 23, 0.68);
  border: 1px solid rgba(198, 255, 0, 0.14);
  border-left: 3px solid var(--blue-neon);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-about .timeline-body h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 1.02rem;
  color: var(--paper);
}

.page-about .timeline-body p {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: rgba(245, 241, 232, 0.78);
}

.page-about .timeline-item:hover .timeline-body,
.page-about .timeline-item:focus-within .timeline-body {
  border-left-color: var(--green-lime);
  transform: translateX(4px);
}

/* ---------- 04 资质与合作 ---------- */
.page-about .cert-grid {
  display: grid;
  gap: 18px;
}

.page-about .cert-card {
  position: relative;
  padding: 24px 20px 22px;
  background: #FFFDF8;
  border: 1px solid var(--gray-line);
  border-radius: 8px 24px 8px 24px;
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

.page-about .cert-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20px;
  width: 56px;
  height: 4px;
  background: var(--green-lime);
}

.page-about .cert-card:nth-child(2)::before {
  left: auto;
  right: 20px;
  background: var(--blue-neon);
}

.page-about .cert-card:nth-child(3)::before {
  left: 50%;
  transform: translateX(-50%);
  background: var(--green-mid);
}

.page-about .cert-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  margin-bottom: 14px;
  border-radius: 14px;
  background: rgba(11, 61, 46, 0.08);
  color: var(--green-deep);
}

.page-about .cert-icon svg {
  width: 30px;
  height: 30px;
}

.page-about .cert-icon--iso {
  color: var(--blue-dark);
}

.page-about .cert-icon--globe {
  color: var(--green-mid);
}

.page-about .cert-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 1.06rem;
  line-height: 1.35;
  color: var(--ink);
}

.page-about .cert-card p {
  margin: 0;
  font-size: 0.83rem;
  line-height: 1.75;
  color: rgba(11, 11, 15, 0.75);
}

.page-about .cert-card:hover,
.page-about .cert-card:focus-within {
  border-color: var(--green-mid);
  box-shadow: 0 10px 24px rgba(11, 61, 46, 0.12);
}

.page-about .cert-award {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 30px;
  padding: 20px 18px;
  background: var(--green-deep);
  border-top: 4px solid var(--green-lime);
  border-radius: 8px 24px 8px 24px;
}

.page-about .cert-award-mark {
  flex: 0 0 auto;
  font-family: var(--font-head);
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1;
  color: var(--green-lime);
}

.page-about .cert-award-text {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.75;
  color: var(--paper);
}

/* ---------- 信任与下一步 ---------- */
.page-about .trust-section {
  padding-top: 16px;
}

.page-about .trust-panel {
  position: relative;
  overflow: hidden;
  padding: 30px 24px;
  background: linear-gradient(120deg, var(--green-deep) 0%, var(--blue-dark) 90%);
  border: 1px solid rgba(198, 255, 0, 0.22);
  border-radius: 8px 28px 8px 28px;
}

.page-about .trust-panel::after {
  content: "";
  position: absolute;
  right: -40px;
  top: -60px;
  width: 180px;
  height: 180px;
  border: 30px solid rgba(0, 229, 255, 0.08);
  border-radius: 50%;
}

.page-about .trust-statement {
  position: relative;
  z-index: 1;
  margin: 0 0 22px;
  font-size: 0.92rem;
  line-height: 1.9;
  color: var(--paper);
}

.page-about .trust-actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: 1.6fr 1fr;
    gap: 40px;
    align-items: center;
    margin-bottom: 40px;
  }

  .page-about .about-title {
    font-size: 2.65rem;
  }

  .page-about .about-hero-stats {
    margin-top: 4px;
  }

  .page-about .about-rail {
    margin-bottom: 64px;
  }

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

  .page-about .section-index {
    font-size: 3rem;
  }

  .page-about .about-h2 {
    font-size: 1.7rem;
  }

  .page-about .origin-grid {
    grid-template-columns: 1.35fr 1fr;
    gap: 44px;
  }

  .page-about .origin-figure img {
    max-height: 520px;
  }

  .page-about .editorial-flow {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-about .flow-panel--check {
    transform: translateY(-16px);
  }

  .page-about .editorial-banner {
    height: 300px;
  }

  .page-about .editorial-banner-copy {
    left: 28px;
    right: auto;
    bottom: 28px;
    max-width: 440px;
  }

  .page-about .timeline-wrap {
    padding: 44px 0 20px;
  }

  .page-about .timeline {
    margin-left: 12%;
  }

  .page-about .timeline-year {
    font-size: 3rem;
  }

  .page-about .timeline-body {
    padding: 18px 20px;
  }

  .page-about .cert-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
  }

  .page-about .cert-award {
    gap: 26px;
    padding: 24px 28px;
  }

  .page-about .cert-award-mark {
    font-size: 2.6rem;
  }

  .page-about .trust-panel {
    padding: 38px 34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero-stats,
  .page-about .timeline-dot,
  .page-about .timeline-item:hover .timeline-body,
  .page-about .timeline-item:focus-within .timeline-body {
    transform: none;
    transition: none;
  }
}