/* ===== page-about · 品牌概况 ===== */
.page-about {
  --about-purple: #171033;
  --about-blue-deep: #0a1f33;
  --about-panel-cut: 16px;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

.page-about .bi-section__head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
  margin-bottom: clamp(28px, 5vw, 48px);
}

.page-about .bi-section__index {
  font-family: var(--font-heading);
  font-size: clamp(2.6rem, 7vw, 5.2rem);
  font-weight: 800;
  line-height: 0.9;
  color: var(--bg-elevated);
  -webkit-text-stroke: 1px rgba(0, 255, 157, 0.35);
  text-shadow: 0 0 24px rgba(0, 255, 157, 0.08);
  flex: 0 0 auto;
}

.page-about .bi-title {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3.2vw, 2.6rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0.01em;
  color: var(--text-primary);
  margin: 0;
}

.page-about .bi-kicker {
  margin: 0 0 12px;
}

/* ---------- 面包屑 ---------- */
.page-about__crumb-wrap {
  padding-top: 20px;
  padding-bottom: 0;
}

/* ---------- 首屏刊头 ---------- */
.page-about__masthead {
  position: relative;
  padding: clamp(40px, 7vw, 88px) 0 clamp(36px, 5vw, 64px);
  background:
    linear-gradient(rgba(0, 255, 157, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 157, 0.06) 1px, transparent 1px),
    radial-gradient(ellipse at 78% 25%, rgba(0, 212, 255, 0.16), transparent 55%),
    radial-gradient(ellipse at 10% 95%, rgba(0, 255, 157, 0.12), transparent 50%),
    var(--bg-primary);
  background-size: 44px 44px, 44px 44px, auto, auto, auto;
  border-bottom: 1px solid var(--border-blue);
}

.page-about__masthead::after {
  content: "";
  position: absolute;
  left: 8%;
  bottom: 0;
  width: 34%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-green), var(--accent-blue), transparent);
  border-radius: 99px;
}

.page-about__masthead-inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
  max-width: 920px;
}

.page-about__masthead-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--accent-green);
  border: 1px solid var(--border-glow);
  background: rgba(0, 255, 157, 0.08);
  padding: 6px 14px;
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}

.page-about__masthead-title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 5.4vw, 4.2rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: 0.01em;
  color: var(--text-primary);
  text-transform: uppercase;
}

.page-about__masthead-title-line {
  display: block;
}

.page-about__masthead-title-line--accent {
  color: var(--accent-green);
  text-shadow: 0 0 20px rgba(0, 255, 157, 0.45);
}

.page-about__masthead-lead {
  max-width: 680px;
  margin: 0;
  color: var(--text-secondary);
}

.page-about__masthead-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.page-about__masthead-meta-item {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--accent-blue);
  border: 1px solid var(--border-blue);
  background: rgba(0, 212, 255, 0.06);
  padding: 4px 12px;
  clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
}

.page-about__masthead-panel {
  display: none;
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  flex-direction: column;
  gap: 10px;
  padding: 12px 0 12px 16px;
  border-left: 2px solid var(--border-glow);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--text-secondary);
  text-align: left;
  writing-mode: vertical-rl;
}

.page-about__anchors {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.page-about__anchors a {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  text-decoration: none;
  border: 1px solid var(--border-blue);
  padding: 6px 14px;
  background: rgba(17, 23, 46, 0.5);
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-about__anchors a:hover {
  color: var(--accent-green);
  border-color: var(--border-glow);
  background: rgba(0, 255, 157, 0.06);
}

/* ---------- 我们是谁 ---------- */
.page-about__intro {
  background: var(--bg-primary);
}

.page-about__intro-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

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

.page-about__intro-copy p {
  margin: 0;
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 15px;
}

.page-about__intro-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

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

.page-about__stat-card {
  position: relative;
  border: 1px solid var(--border-blue);
  background: var(--bg-secondary);
  padding: 20px 16px 18px;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-about__stat-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-2px);
}

.page-about__stat-card-label {
  display: block;
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.page-about__stat-card-value {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1;
  color: var(--accent-green);
  text-shadow: 0 0 18px rgba(0, 255, 157, 0.35);
}

.page-about__stat-card-value em {
  font-style: normal;
  font-size: 0.55em;
  color: var(--accent-blue);
  margin-left: 4px;
}

/* ---------- 发展里程碑 ---------- */
.page-about__timeline-section {
  background: linear-gradient(160deg, var(--bg-primary) 0%, var(--about-purple) 42%, var(--bg-primary) 100%);
}

.page-about__timeline-image {
  border: 1px solid var(--border-blue);
  background: var(--bg-secondary);
  padding: 10px;
  margin-bottom: clamp(32px, 6vw, 56px);
}

.page-about__timeline-image::before {
  content: "BEGIN / 2016";
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--accent-green);
  margin-bottom: 10px;
}

.page-about__timeline-image img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about__timeline-inner {
  position: relative;
  max-width: 860px;
  padding: 8px 0 16px;
}

.page-about__timeline-inner::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-green) 0%, var(--accent-blue) 48%, var(--accent-red) 100%);
  opacity: 0.55;
}

.page-about__timeline-item {
  position: relative;
  padding-left: 40px;
  margin-bottom: 44px;
}

.page-about__timeline-item:last-child {
  margin-bottom: 0;
}

.page-about__timeline-node {
  position: absolute;
  left: -2px;
  top: 6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 3px solid var(--accent-green);
  box-shadow: 0 0 14px rgba(0, 255, 157, 0.55);
}

.page-about__timeline-node span {
  position: absolute;
  left: 28px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--accent-blue);
  white-space: nowrap;
}

.page-about__timeline-card {
  background: rgba(23, 16, 51, 0.55);
  border: 1px solid var(--border-blue);
  border-left: 2px solid var(--accent-green);
  padding: 20px 20px 22px;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.page-about__timeline-card:hover {
  border-color: var(--border-glow);
  box-shadow: 0 0 28px rgba(0, 255, 157, 0.08);
  transform: translateX(3px);
}

.page-about__timeline-year {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 800;
  color: var(--accent-green);
}

.page-about__timeline-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-heading);
  font-size: 20px;
  line-height: 1.2;
  color: var(--text-primary);
}

.page-about__timeline-card p:last-child {
  margin: 0;
  color: var(--text-secondary);
  font-size: 14px;
}

/* ---------- 资质与认证 ---------- */
.page-about__certs-section {
  background:
    radial-gradient(ellipse at 8% 10%, rgba(0, 212, 255, 0.1), transparent 45%),
    radial-gradient(ellipse at 92% 90%, rgba(0, 255, 157, 0.08), transparent 45%),
    var(--bg-primary);
}

.page-about__certs-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about__cert-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-blue);
  padding: 22px;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-about__cert-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-3px);
}

.page-about__cert-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 800;
  color: var(--accent-green);
  border: 1px solid var(--border-glow);
  background: var(--bg-elevated);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.page-about__cert-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-heading);
  font-size: 18px;
  color: var(--text-primary);
}

.page-about__cert-card p {
  margin: 0;
  font-size: 14px;
  color: var(--text-secondary);
}

/* ---------- 团队与组织 ---------- */
.page-about__team-section {
  background: linear-gradient(195deg, var(--bg-primary) 0%, var(--about-purple) 72%, var(--bg-primary) 100%);
}

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

.page-about__team-image {
  border: 1px solid var(--border-blue);
  padding: 8px;
  background: var(--bg-secondary);
}

.page-about__team-image img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

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

.page-about__team-copy > p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 15px;
}

.page-about__team-divider {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  margin: 4px 0;
}

.page-about__team-divider::before,
.page-about__team-divider::after {
  content: "";
  height: 1px;
  background: linear-gradient(90deg, var(--border-glow), var(--border-blue), transparent);
}

.page-about__team-divider::before {
  flex: 1;
}

.page-about__team-divider::after {
  flex: 2;
}

.page-about__team-divider span {
  width: 8px;
  height: 8px;
  background: var(--accent-green);
  transform: rotate(45deg);
  box-shadow: 0 0 10px rgba(0, 255, 157, 0.5);
}

.page-about__team-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  width: 100%;
}

.page-about__team-list li {
  border: 1px solid var(--border-blue);
  background: rgba(17, 23, 46, 0.55);
  padding: 14px 16px;
  font-size: 14px;
  color: var(--text-secondary);
  transition: border-color 0.2s ease;
}

.page-about__team-list li:hover {
  border-color: var(--border-glow);
}

.page-about__team-list strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 15px;
  letter-spacing: 0.05em;
  color: var(--accent-blue);
  margin-bottom: 4px;
}

.page-about__team-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

/* ---------- 合作与伙伴 ---------- */
.page-about__partners-section {
  background: var(--bg-primary);
}

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

.page-about__partners-copy > p {
  margin: 0 0 20px;
  color: var(--text-secondary);
  font-size: 15px;
}

.page-about__partners-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about__partners-list li {
  padding: 4px 0 4px 16px;
  border-left: 2px solid var(--accent-blue);
  font-size: 14px;
  color: var(--text-secondary);
}

.page-about__partners-list__tag {
  display: inline-block;
  margin-right: 10px;
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent-green);
  letter-spacing: 0.06em;
}

.page-about__partners-cta {
  margin-top: 22px;
}

.page-about__partners-image {
  border: 1px solid var(--border-blue);
  padding: 8px;
  background: var(--bg-secondary);
}

.page-about__partners-image img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 底部信任面板 ---------- */
.page-about__bottom {
  background:
    linear-gradient(90deg, rgba(0, 255, 157, 0.05) 1px, transparent 1px),
    linear-gradient(rgba(0, 255, 157, 0.04) 1px, transparent 1px),
    var(--bg-primary);
  background-size: 40px 40px, 40px 40px;
}

.page-about__bottom-panel {
  position: relative;
  border: 1px solid var(--border-glow);
  background: var(--bg-secondary);
  padding: clamp(28px, 5vw, 56px);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.page-about__bottom-panel::before {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-green), var(--accent-blue), transparent);
  opacity: 0.7;
}

.page-about__bottom-title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--text-primary);
}

.page-about__bottom-text {
  margin: 0 auto;
  max-width: 640px;
  color: var(--text-secondary);
  font-size: 15px;
}

.page-about__bottom-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 10px;
}

/* ---------- 动效过渡 ---------- */
.page-about [data-reveal] {
  transition: opacity 0.6s ease, transform 0.6s ease;
}

/* ===== 响应式 ===== */
@media (min-width: 720px) {
  .page-about__intro-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 44px;
    align-items: center;
  }

  .page-about__intro-stats {
    gap: 14px;
  }

  .page-about__certs-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .page-about__team-grid {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 44px;
    align-items: center;
  }

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

  .page-about__partners-grid {
    grid-template-columns: 1fr 1.1fr;
    gap: 44px;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-about__masthead-panel {
    display: flex;
    writing-mode: vertical-rl;
    right: 0;
  }

  .page-about__masthead-inner {
    max-width: 980px;
  }

  .page-about__anchor {
    margin-top: 24px;
  }

  .page-about__timeline-image {
    max-width: 860px;
  }

  .page-about__timeline-inner {
    padding-left: 6px;
  }

  .page-about__timeline-inner::before {
    left: 9px;
  }

  .page-about__timeline-node {
    left: 0;
  }

  .page-about__timeline-item {
    padding-left: 56px;
  }

  .page-about__timeline-card {
    max-width: 760px;
  }

  .page-about__certs-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
  }
}