.page-about {
  overflow-x: hidden;
}

/* ===== 页面首屏 ===== */
.page-about .about-hero {
  position: relative;
  padding: 32px 0 44px;
  border-bottom: 4px solid var(--c-primary);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--c-accent) 0%, var(--c-cyan) 100%);
}

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

.page-about .page-head {
  border-left: 6px solid var(--c-accent);
  padding-left: 18px;
}

.page-about .page-head .section-kicker {
  color: var(--c-cyan-deep);
}

.page-about .page-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--c-primary);
  margin: 12px 0 16px;
}

.page-about .page-subtitle {
  font-size: clamp(0.95rem, 1.4vw, 1.1rem);
  line-height: 1.85;
  color: var(--c-gray);
  max-width: 62ch;
  margin: 0;
}

.page-about .about-hero__est {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 900;
  letter-spacing: 0.22em;
  color: var(--c-cyan-deep);
  margin-top: 24px;
  border-top: 3px solid var(--c-cyan);
  padding-top: 12px;
  display: inline-block;
}

/* ===== 区块头通用 ===== */
.page-about .section-head {
  margin-bottom: 32px;
}

.page-about .section-kicker {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.18em;
  color: var(--c-accent);
  text-transform: uppercase;
  margin-bottom: 12px;
  padding-left: 14px;
  position: relative;
}

.page-about .section-kicker::before {
  content: "";
  position: absolute;
  left: 0;
  top: 2px;
  width: 4px;
  height: calc(100% - 4px);
  background: var(--c-cyan);
}

.page-about .section-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 900;
  color: var(--c-primary);
  line-height: 1.2;
  margin: 0 0 10px;
}

.page-about .section-subtitle {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--c-gray);
  margin: 0;
  max-width: 60ch;
}

/* ===== 01 公司简介 ===== */
.page-about .about-intro {
  background: var(--c-light);
  border-top: 4px solid var(--c-primary);
  border-bottom: 4px solid var(--c-primary);
  padding: 48px 0;
}

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

.page-about .about-intro__content .about-intro__lead {
  font-size: 1.1rem;
  font-weight: 500;
  line-height: 1.8;
  color: var(--c-primary);
  margin-bottom: 16px;
}

.page-about .about-intro__content p {
  color: var(--c-dark);
  line-height: 1.8;
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.page-about .about-intro__content strong {
  color: var(--c-primary);
  font-weight: 700;
}

.page-about .about-intro__content .entry-link {
  margin-top: 8px;
  display: inline-block;
}

.page-about .about-intro__aside {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-about .about-intro__figure {
  margin: 0;
  border: 3px solid var(--c-primary);
  border-bottom-width: 8px;
}

.page-about .about-intro__stats {
  border: 3px solid var(--c-primary);
  border-left: 0;
  border-right: 0;
  padding: 14px 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.page-about .about-stat {
  text-align: center;
  padding: 6px 2px;
  min-width: 0;
}

.page-about .about-stat + .about-stat {
  border-left: 2px solid var(--c-border);
}

.page-about .about-stat__num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 900;
  color: var(--c-primary);
  line-height: 1;
  white-space: nowrap;
}

.page-about .about-stat__num span {
  font-size: 0.75rem;
  color: var(--c-accent);
  margin-left: 2px;
}

.page-about .about-stat__label {
  font-size: 0.78rem;
  color: var(--c-gray);
  margin-top: 6px;
  display: block;
}

/* ===== 02 发展里程碑 ===== */
.page-about .about-timeline-section {
  background: var(--c-primary);
  color: var(--c-light);
  padding: 56px 0;
}

.page-about .about-timeline-section .section-kicker {
  color: var(--c-cyan);
}

.page-about .about-timeline-section .section-kicker::before {
  background: var(--c-accent);
}

.page-about .about-timeline-section .section-title {
  color: #F5F7FA;
}

.page-about .about-timeline-section .section-subtitle {
  color: #A9B7C9;
}

.page-about .about-timeline {
  border-top: 3px solid var(--c-cyan);
  margin-top: 36px;
}

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  transition: transform 0.2s ease;
}

.page-about .about-timeline__item:hover {
  transform: translateX(6px);
}

.page-about .about-timeline__year {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 900;
  color: var(--c-cyan);
  line-height: 1;
  text-align: right;
  padding-top: 4px;
  transition: color 0.2s ease;
}

.page-about .about-timeline__panel {
  border-left: 3px solid rgba(0, 229, 255, 0.35);
  padding-left: 16px;
  transition: border-color 0.2s ease;
}

.page-about .about-timeline__item:hover .about-timeline__year {
  color: var(--c-accent);
}

.page-about .about-timeline__item:hover .about-timeline__panel {
  border-left-color: var(--c-accent);
}

.page-about .about-timeline__panel h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 900;
  color: #FFFFFF;
  margin: 0 0 8px;
}

.page-about .about-timeline__panel p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: #B7C3D4;
  margin: 0 0 6px;
}

.page-about .about-timeline__meta {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: rgba(0, 229, 255, 0.65);
  text-transform: uppercase;
  margin: 0;
}

/* ===== 03 资质认证 ===== */
.page-about .about-cert-section {
  padding: 56px 0;
}

.page-about .about-cert__grid {
  display: grid;
  gap: 20px;
}

.page-about .about-cert__card {
  border: 3px solid var(--c-primary);
  background: #FFFFFF;
  padding: 28px 24px;
  box-shadow: 6px 6px 0 var(--c-primary);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.page-about .about-cert__card:hover,
.page-about .about-cert__card:focus-within {
  transform: translate(-3px, -3px);
  box-shadow: 9px 9px 0 var(--c-cyan);
}

.page-about .about-cert__card svg {
  width: 48px;
  height: 48px;
  color: var(--c-accent);
  margin-bottom: 16px;
}

.page-about .about-cert__card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--c-primary);
  margin: 0 0 6px;
}

.page-about .about-cert__card p {
  font-size: 0.9rem;
  color: var(--c-gray);
  line-height: 1.6;
  margin: 0;
}

.page-about .about-cert__meta {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--c-gray);
  margin-top: 10px;
  display: inline-block;
  border-top: 2px solid var(--c-light);
  padding-top: 8px;
  opacity: 0.85;
  transition: color 0.2s ease, opacity 0.2s ease;
}

.page-about .about-cert__card:hover .about-cert__meta,
.page-about .about-cert__card:focus-within .about-cert__meta {
  color: var(--c-accent);
  opacity: 1;
}

/* ===== 04 团队与文化 ===== */
.page-about .about-team-section {
  background: var(--c-light);
  border-top: 4px solid var(--c-primary);
  border-bottom: 4px solid var(--c-primary);
  padding: 56px 0;
}

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

.page-about .about-team__text p {
  color: var(--c-dark);
  line-height: 1.8;
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.page-about .about-team__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 3px solid var(--c-primary);
  padding-top: 20px;
  margin-top: 24px;
}

.page-about .about-team__stat {
  text-align: center;
  padding: 6px 2px;
  min-width: 0;
}

.page-about .about-team__stat + .about-team__stat {
  border-left: 2px solid var(--c-border);
}

.page-about .about-team__stat-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 900;
  color: var(--c-accent);
  line-height: 1;
  display: block;
  white-space: nowrap;
}

.page-about .about-team__stat-label {
  font-size: 0.78rem;
  color: var(--c-gray);
  margin-top: 6px;
  display: block;
}

.page-about .about-team__figure {
  margin: 0;
}

/* ===== 05 合作伙伴 ===== */
.page-about .about-partner-section {
  padding: 56px 0;
}

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

.page-about .about-partner__text p {
  color: var(--c-dark);
  line-height: 1.8;
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.page-about .about-partner__text strong {
  color: var(--c-primary);
  font-weight: 700;
}

.page-about .about-partner__types {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0 8px;
}

.page-about .about-partner__figure {
  margin: 0;
  border: 3px solid var(--c-primary);
  border-top-width: 8px;
}

/* ===== 延伸入口 ===== */
.page-about .about-outro {
  padding: 56px 0 72px;
  background: linear-gradient(135deg, rgba(10, 31, 68, 0.04) 0%, rgba(0, 229, 255, 0.08) 100%);
  text-align: center;
}

.page-about .about-outro__title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--c-primary);
  margin: 0 0 12px;
}

.page-about .about-outro__desc {
  color: var(--c-gray);
  font-size: 0.95rem;
  margin: 0 auto 24px;
  max-width: 50ch;
}

.page-about .about-outro__links {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: center;
  justify-content: center;
}

.page-about .about-outro__links .btn {
  min-width: min(280px, 100%);
}

/* ===== 平板 ===== */
@media (min-width: 768px) {
  .page-about .about-intro__grid {
    grid-template-columns: 1.35fr 0.9fr;
    gap: 48px;
    align-items: start;
  }

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

  .page-about .about-team__grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 48px;
  }

  .page-about .about-partner__grid {
    grid-template-columns: 1.1fr 1fr;
    align-items: center;
    gap: 48px;
  }

  .page-about .about-outro__links {
    flex-direction: row;
  }
}

/* ===== 桌面 ===== */
@media (min-width: 1024px) {
  .page-about .about-hero {
    padding-top: 48px;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 150px 1fr;
    gap: 28px;
    padding: 26px 0;
  }

  .page-about .about-timeline__year {
    font-size: 2.75rem;
  }

  .page-about .about-timeline__panel {
    padding-left: 24px;
  }
}