.page-about {
  --about-section-space: 72px;
  --about-title-size: clamp(2.2rem, 6vw, 4.4rem);
  --about-divider: rgba(0, 229, 255, 0.18);
  position: relative;
}

.page-about .about-hero {
  position: relative;
  padding-top: calc(var(--header-height, 92px) + 56px);
  padding-bottom: 56px;
  background:
    radial-gradient(ellipse at 82% 18%, rgba(0, 229, 255, 0.14), transparent 52%),
    radial-gradient(ellipse at 12% 82%, rgba(57, 255, 20, 0.07), transparent 42%),
    linear-gradient(145deg, var(--color-bg) 0%, #0a1020 58%, var(--color-bg) 100%);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  right: -160px;
  top: -80px;
  width: 460px;
  height: 460px;
  border: 1px solid var(--color-border);
  transform: rotate(28deg);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 88px;
  background: linear-gradient(135deg, transparent 60%, rgba(0, 59, 70, 0.32) 60%, rgba(0, 59, 70, 0.32) 72%, transparent 72%);
  pointer-events: none;
}

.page-about .about-hero .container {
  position: relative;
  z-index: 2;
}

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-text-secondary);
  margin-bottom: 44px;
  letter-spacing: 0.04em;
}

.page-about .breadcrumb__link {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-base);
}

.page-about .breadcrumb__link:hover {
  color: var(--color-cyan);
}

.page-about .breadcrumb__sep {
  color: var(--color-cyan);
  opacity: 0.6;
}

.page-about .breadcrumb__current {
  color: var(--color-text);
}

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

.page-about .about-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  color: var(--color-green);
  text-transform: uppercase;
  margin-bottom: 20px;
  padding: 8px 16px;
  background: rgba(57, 255, 20, 0.06);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 50%, calc(100% - 12px) 100%, 0 100%, 12px 50%);
  width: fit-content;
}

.page-about .about-hero__title {
  font-family: var(--font-heading);
  font-size: var(--about-title-size);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: 0.01em;
  color: var(--color-text);
  text-transform: uppercase;
  margin: 0 0 24px;
}

.page-about .about-hero__title span {
  display: block;
  color: var(--color-cyan);
  text-shadow: 0 0 32px rgba(0, 229, 255, 0.22);
}

.page-about .about-hero__lead {
  max-width: 56ch;
  color: var(--color-text-secondary);
  font-size: 1.02rem;
  line-height: 1.9;
  margin: 0 0 28px;
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.83rem;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  padding-left: 2px;
}

.page-about .about-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-green);
  box-shadow: 0 0 10px rgba(57, 255, 20, 0.65);
  animation: aboutPulse 1.8s ease-in-out infinite;
}

@keyframes aboutPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.78); }
}

.page-about .about-hero__meta-sep {
  color: var(--color-cyan);
  opacity: 0.45;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.page-about .about-hero__preview {
  position: relative;
  align-self: end;
  padding: 28px 28px 34px;
  background: rgba(14, 21, 36, 0.72);
  backdrop-filter: blur(8px);
  border-left: 2px solid var(--color-cyan);
  border-radius: 4px;
  clip-path: polygon(0 0, 100% 6px, 100% calc(100% - 6px), 0 100%);
}

.page-about .about-hero__preview::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, transparent 46%, rgba(0, 229, 255, 0.16) 46%);
}

.page-about .about-hero__preview .note-vertical {
  font-size: 0.76rem;
  color: var(--color-green);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 22px;
}

.page-about .about-hero__preview-title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  color: var(--color-text);
  margin-bottom: 18px;
}

.page-about .preview-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .preview-list li + li {
  margin-top: 2px;
}

.page-about .preview-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 4px;
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.94rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: color 0.2s ease, padding-left 0.3s ease, border-color 0.3s ease;
  position: relative;
}

.page-about .preview-list a::after {
  content: "→";
  font-family: var(--font-mono);
  color: var(--color-cyan);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.page-about .preview-list a:hover {
  color: var(--color-text);
  padding-left: 14px;
  border-bottom-color: rgba(0, 229, 255, 0.35);
}

.page-about .preview-list a:hover::after {
  opacity: 1;
  transform: translateX(0);
}

/* ---------- 01 我们是谁 ---------- */
.page-about .about-who {
  padding: var(--about-section-space) 0;
}

.page-about .about-who__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 52px;
  margin-top: 40px;
}

.page-about .about-who__content p {
  color: var(--color-text-secondary);
  line-height: 1.9;
  margin: 0 0 18px;
  max-width: 62ch;
}

.page-about .about-who__content p:first-of-type {
  font-size: 1.14rem;
  color: var(--color-text);
  font-weight: 500;
}

.page-about .about-who__more {
  margin-top: 10px;
}

.page-about .about-who__aside {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.page-about .brand-card {
  background: var(--color-bg-elev);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 28px;
  position: relative;
  overflow: hidden;
}

.page-about .brand-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--color-cyan), var(--color-green));
}

.page-about .brand-card__label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-cyan);
  margin-bottom: 22px;
}

.page-about .brand-card__list {
  margin: 0;
  padding: 0;
}

.page-about .brand-card__list > div {
  display: flex;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.page-about .brand-card__list dt {
  width: 76px;
  flex-shrink: 0;
  font-size: 0.84rem;
  color: var(--color-text-secondary);
}

.page-about .brand-card__list dd {
  margin: 0;
  color: var(--color-text);
  font-size: 0.9rem;
  font-weight: 500;
}

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

.page-about .stat-number {
  background: rgba(14, 21, 36, 0.68);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 6px;
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .stat-number--cyan {
  border-left: 2px solid var(--color-cyan);
}

.page-about .stat-number--green {
  border-left: 2px solid var(--color-green);
}

.page-about .stat-number--orange {
  border-left: 2px solid var(--color-orange);
}

.page-about .stat-number__num {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 900;
  color: var(--color-text);
  line-height: 1;
}

.page-about .stat-number--cyan .stat-number__num {
  color: var(--color-cyan);
}

.page-about .stat-number--green .stat-number__num {
  color: var(--color-green);
}

.page-about .stat-number--orange .stat-number__num {
  color: var(--color-orange);
}

.page-about .stat-number__label {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.04em;
}

/* ---------- 02 发展历程 ---------- */
.page-about .about-timeline {
  padding: var(--about-section-space) 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, transparent 0%, rgba(57, 255, 20, 0.04) 45%, transparent 100%);
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-timeline .container {
  position: relative;
}

.page-about .about-timeline__figure {
  margin: 44px 0 40px;
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: 6px;
  filter: saturate(0.75) contrast(1.08);
}

.page-about .about-timeline__figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.08em;
}

.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 28px;
  border-left: 1px solid rgba(0, 229, 255, 0.2);
}

.page-about .timeline__item {
  position: relative;
  padding: 18px 0 18px 28px;
  transition: background 0.3s ease;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -36px;
  top: 30px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-cyan);
  border: 2px solid var(--color-bg);
  box-shadow: 0 0 14px rgba(0, 229, 255, 0.5);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  z-index: 1;
}

.page-about .timeline__item:hover::before {
  transform: scale(1.4);
  box-shadow: 0 0 22px rgba(0, 229, 255, 0.85);
}

.page-about .timeline__item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 100%;
  background: linear-gradient(90deg, rgba(0, 229, 255, 0.03), transparent 70%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.page-about .timeline__item:hover::after {
  opacity: 1;
}

.page-about .timeline__year {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 900;
  color: var(--color-cyan);
  display: block;
  margin-bottom: 6px;
  line-height: 1;
  opacity: 0.82;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.page-about .timeline__item:hover .timeline__year {
  opacity: 1;
  transform: translateX(4px);
}

.page-about .timeline__content h3 {
  font-family: var(--font-body);
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 6px;
}

.page-about .timeline__content p {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  line-height: 1.75;
  margin: 0;
  max-width: 54ch;
}

/* ---------- 03 技术实力 ---------- */
.page-about .about-tech {
  padding: var(--about-section-space) 0;
}

.page-about .about-tech__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  margin-top: 44px;
}

.page-about .about-tech__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: 6px;
}

.page-about .about-tech__content {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.page-about .tech-panel {
  background: rgba(14, 21, 36, 0.42);
  border-left: 2px solid var(--color-cyan);
  padding: 20px 20px 20px 24px;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.page-about .tech-panel + .tech-panel {
  border-top: 1px solid rgba(255, 255, 255, 0.03);
}

.page-about .tech-panel:hover {
  border-left-color: var(--color-green);
  background: rgba(0, 229, 255, 0.05);
}

.page-about .tech-panel__label {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-cyan);
  margin: 0 0 8px;
}

.page-about .tech-panel:hover .tech-panel__label {
  color: var(--color-green);
}

.page-about .tech-panel__text {
  color: var(--color-text-secondary);
  font-size: 0.93rem;
  line-height: 1.8;
  margin: 0;
}

.page-about .about-tech__counts {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .about-tech__counts li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 12px 14px;
  background: var(--color-bg-elev);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 4px;
}

.page-about .about-tech__counts strong {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--color-green);
  line-height: 1;
}

.page-about .about-tech__counts span {
  font-size: 0.78rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.04em;
}

/* ---------- 04 资质与荣誉 ---------- */
.page-about .about-honor {
  padding: var(--about-section-space) 0;
  position: relative;
}

.page-about .about-honor::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(75, 0, 130, 0.8), transparent);
}

.page-about .about-honor__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 44px;
}

.page-about .honor-card {
  background: rgba(14, 21, 36, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  padding: 26px 24px;
  position: relative;
  overflow: hidden;
  transition: background 0.3s ease, transform 0.3s ease;
}

.page-about .honor-card:hover {
  background: rgba(14, 21, 36, 0.92);
  transform: translateY(-3px);
}

.page-about .honor-card::after {
  content: "";
  position: absolute;
  right: -24px;
  bottom: -24px;
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(75, 0, 130, 0.35), transparent 66%);
  pointer-events: none;
}

.page-about .honor-card__index {
  display: inline-flex;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-orange);
  background: rgba(255, 106, 0, 0.08);
  border: 1px solid rgba(255, 106, 0, 0.24);
  padding: 4px 10px;
  margin-bottom: 16px;
  border-radius: 2px;
}

.page-about .honor-card h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--color-text);
  margin: 0 0 10px;
  text-transform: uppercase;
}

.page-about .honor-card p {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  line-height: 1.75;
  margin: 0;
}

.page-about .about-honor__ecosystem {
  margin-top: 32px;
  padding: 28px;
  background: linear-gradient(135deg, rgba(75, 0, 130, 0.16), rgba(0, 59, 70, 0.18));
  border-radius: 8px;
  position: relative;
  overflow: hidden;
}

.page-about .about-honor__ecosystem::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-orange), var(--color-cyan));
}

.page-about .about-honor__ecosystem-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-orange);
  margin: 0 0 10px;
}

.page-about .about-honor__ecosystem-text {
  color: var(--color-text);
  font-size: 0.95rem;
  line-height: 1.85;
  margin: 0;
  max-width: 80ch;
}

/* ---------- 05 团队风貌 ---------- */
.page-about .about-team {
  padding: var(--about-section-space) 0;
  position: relative;
}

.page-about .about-team::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(122, 32, 64, 0.8), transparent);
}

.page-about .about-team__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  margin-top: 44px;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: 6px;
}

.page-about .about-team__content p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.85;
  margin: 0 0 18px;
}

.page-about .about-team__content p:first-of-type {
  color: var(--color-text);
  font-weight: 500;
  font-size: 1.04rem;
}

.page-about .about-team__roles {
  list-style: none;
  margin: 22px 0 28px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.page-about .about-team__roles li {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 16px 8px;
  background: rgba(14, 21, 36, 0.66);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 6px;
  text-align: center;
}

.page-about .about-team__roles span {
  font-size: 0.82rem;
  color: var(--color-text-secondary);
}

.page-about .about-team__roles strong {
  font-family: var(--font-heading);
  font-size: 1.7rem;
  font-weight: 900;
  color: var(--color-cyan);
  line-height: 1;
}

.page-about .about-team__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ---------- 数据流分隔线 ---------- */
.page-about .data-line {
  height: 1px;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-green), transparent);
  position: relative;
  margin-top: 36px;
}

.page-about .data-line::after {
  content: "";
  position: absolute;
  left: 0;
  top: -1px;
  width: 90px;
  height: 3px;
  background: var(--color-cyan);
  animation: aboutStream 5s infinite ease-in-out;
}

@keyframes aboutStream {
  0% { transform: translateX(0); opacity: 1; }
  60% { transform: translateX(260px); opacity: 0.4; }
  100% { transform: translateX(0); opacity: 1; }
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-tech__counts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 768px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 64px;
    align-items: end;
  }

  .page-about .about-who__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 64px;
  }

  .page-about .about-honor__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-tech__layout {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 72px;
    align-items: center;
  }

  .page-about .about-timeline__figure img {
    max-height: 300px;
  }

  .page-about .timeline {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 64px;
  }

  .page-about .timeline__item:nth-child(odd) {
    padding-right: 28px;
  }

  .page-about .timeline__item:nth-child(even) {
    padding-left: 56px;
    border-left: 1px solid rgba(0, 229, 255, 0.12);
  }

  .page-about .timeline__item:nth-child(even)::before {
    left: -7px;
  }

  .page-about .timeline__item:nth-child(odd)::before {
    left: -7px;
  }
}