.page-about {
  --about-ink: #365047;
  --about-soft: #60746b;
  --about-panel: #e9e4d8;
  position: relative;
  background: var(--c-deep);
  color: var(--c-text);
}

/* ===== 首屏品牌 ===== */
.page-about .about-hero {
  position: relative;
  padding: clamp(3rem, 7vw, 5rem) 0 5rem;
  background: linear-gradient(135deg, var(--c-dark) 0%, var(--c-deep) 70%);
  overflow: hidden;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 229, 255, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, .04) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: .45;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 70%);
  mask-image: linear-gradient(90deg, transparent, #000 70%);
  pointer-events: none;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -20%;
  left: 58%;
  width: 180px;
  height: 140%;
  background: linear-gradient(90deg, transparent, rgba(212, 175, 55, .22), transparent);
  pointer-events: none;
  animation: about-light-sweep 5s ease-in-out infinite alternate;
}
@keyframes about-light-sweep {
  from { transform: translateX(-18px) rotate(22deg); }
  to { transform: translateX(18px) rotate(22deg); }
}
.page-about .about-hero-inner { position: relative; z-index: 1; }
.page-about .about-hero .breadcrumbs { margin-bottom: var(--space-4); }
.page-about .about-hero-layout { display: grid; gap: var(--space-5); }
.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.1;
  margin: var(--space-2) 0 .4rem;
  letter-spacing: .02em;
}
.page-about .about-hero-sub {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(.9rem, 2vw, 1.15rem);
  font-weight: 400;
  letter-spacing: .06em;
  color: var(--c-gold);
  margin-bottom: var(--space-3);
}
.page-about .about-hero-lead {
  font-size: clamp(1rem, 1.7vw, 1.15rem);
  line-height: 1.9;
  color: var(--c-gray);
  max-width: 46rem;
  margin-bottom: var(--space-4);
}
.page-about .about-hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.page-about .about-hero-visual { position: relative; margin-top: var(--space-2); }
.page-about .about-hero-panel {
  border-radius: var(--radius);
  border: 1px solid var(--c-gold-border);
  aspect-ratio: 16 / 9;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.page-about .about-hero-panel img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  opacity: .9;
}
.page-about .about-hero-stamp {
  position: absolute;
  right: -10px;
  bottom: 16px;
  background: var(--c-red);
  color: var(--c-text);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .95rem;
  line-height: 1.25;
  letter-spacing: .08em;
  text-align: center;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius);
  transform: rotate(-3deg);
  box-shadow: var(--shadow-card);
}

/* ===== 品牌使命 ===== */
.page-about .about-mission {
  padding: clamp(3.5rem, 8vw, 6rem) 0;
  color: var(--c-dark);
}
.page-about .about-mission .section-badge,
.page-about .about-tech .section-badge,
.page-about .about-eco .section-badge { color: var(--c-dark); }
.page-about .about-mission h2,
.page-about .about-tech h2,
.page-about .about-eco h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  line-height: 1.2;
  color: var(--c-dark);
  margin: var(--space-2) 0 var(--space-3);
}
.page-about .about-mission-grid { display: grid; gap: var(--space-4); }
.page-about .about-mission-note {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--about-ink);
  border-left: 3px solid var(--c-gold);
  padding-left: var(--space-3);
  margin-top: var(--space-3);
}
.page-about .about-mission-copy p {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--about-ink);
  margin-bottom: var(--space-3);
}
.page-about .about-mission-trust {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}
.page-about .about-mission-visual {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--c-gold-border);
  position: relative;
}
.page-about .about-mission-visual img {
  width: 100%;
  height: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}
.page-about .about-mission-visual figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: var(--space-3);
  background: linear-gradient(0deg, var(--c-dark), transparent);
  color: var(--c-text);
  font-family: var(--font-data);
  font-size: .78rem;
  letter-spacing: .04em;
}
.page-about .about-mission-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  background: var(--c-dark);
  color: var(--c-text);
  padding: var(--space-4);
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
}
.page-about .about-mission-stats::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-gold), var(--c-red));
}
.page-about .about-mission-stat {
  background: rgba(255, 255, 255, .04);
  border: 1px solid var(--c-gold-border);
  border-radius: var(--radius);
  padding: var(--space-3);
}
.page-about .about-mission-stat .data-label {
  display: block;
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--c-gray);
  margin-bottom: .45rem;
}
.page-about .about-mission-stat .data-value {
  font-family: var(--font-data);
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  font-weight: 700;
  color: var(--c-gold);
}

/* ===== 发展里程碑 ===== */
.page-about .about-roadmap {
  position: relative;
  padding: clamp(3.5rem, 8vw, 6rem) 0;
  background: var(--c-dark);
  overflow: hidden;
}
.page-about .about-roadmap::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(118deg, transparent 0 20px, rgba(0, 229, 255, .025) 20px 21px);
  pointer-events: none;
}
.page-about .about-roadmap .container { position: relative; z-index: 1; }
.page-about .about-roadmap .section-head p,
.page-about .about-tech .section-head p,
.page-about .about-honors .section-head p,
.page-about .about-eco .section-head p {
  color: var(--c-gray);
  max-width: 46rem;
}
.page-about .about-timeline { position: relative; margin-top: var(--space-5); }
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 8px;
  width: 2px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, var(--c-gold) 0%, rgba(212, 175, 55, .18) 75%, transparent);
}
.page-about .about-tl-item {
  position: relative;
  display: block;
  padding-left: 34px;
  margin-bottom: var(--space-4);
}
.page-about .about-tl-dot {
  position: absolute;
  top: 1.25rem;
  left: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--c-gold);
  box-shadow: 0 0 0 4px rgba(212, 175, 55, .18), 0 0 18px rgba(212, 175, 55, .55);
  transform: translateX(-50%);
}
.page-about .about-tl-card {
  background: var(--c-deep);
  border: 1px solid var(--c-gold-border);
  border-left: 3px solid var(--c-gold);
  border-radius: var(--radius);
  padding: var(--space-4);
  transition: var(--transition);
}
.page-about .about-tl-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
  border-color: var(--c-gold);
}
.page-about .about-tl-era {
  display: inline-block;
  font-family: var(--font-data);
  font-size: .74rem;
  letter-spacing: .12em;
  color: var(--c-red);
  border: 1px solid rgba(200, 16, 46, .5);
  background: rgba(200, 16, 46, .08);
  border-radius: 999px;
  padding: .28rem .65rem;
  margin-bottom: var(--space-2);
}
.page-about .about-tl-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--c-text);
  margin-bottom: var(--space-2);
}
.page-about .about-tl-card p {
  font-size: .95rem;
  line-height: 1.75;
  color: var(--c-gray);
  margin: 0;
}

/* ===== 技术基础设施 ===== */
.page-about .about-tech {
  padding: clamp(3.5rem, 8vw, 6rem) 0;
  color: var(--c-dark);
}
.page-about .about-tech-layout {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-2);
}
.page-about .about-tech-visual {
  background: var(--c-dark);
  border: 1px solid var(--c-gold-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  align-self: start;
}
.page-about .about-tech-svg { width: 100%; height: auto; display: block; }
.page-about .about-orbit {
  stroke: rgba(176, 141, 62, .45);
  stroke-width: 1.5;
  stroke-dasharray: 3 8;
  fill: none;
}
.page-about .about-orbit--cyan { stroke: rgba(0, 229, 255, .35); }
.page-about .about-orbit--red { stroke: rgba(200, 16, 46, .35); }
.page-about .about-orbit-cross {
  stroke: rgba(155, 168, 160, .16);
  stroke-width: 1;
  stroke-dasharray: 2 6;
}
.page-about .about-pulse { fill: var(--c-gold); }
.page-about .about-pulse--gold { filter: drop-shadow(0 0 8px rgba(212, 175, 55, .7)); }
.page-about .about-pulse--cyan {
  fill: var(--c-cyan);
  filter: drop-shadow(0 0 8px rgba(0, 229, 255, .55));
}
.page-about .about-core-num {
  fill: var(--c-gold);
  font-family: var(--font-data);
  font-size: 1.7rem;
  font-weight: 700;
}
.page-about .about-core-sub {
  fill: var(--c-gray);
  font-family: var(--font-body);
  font-size: .8rem;
}
.page-about .about-sat-label {
  fill: var(--c-gray);
  font-family: var(--font-data);
  font-size: .68rem;
  letter-spacing: .04em;
}
.page-about .about-tech-copy h3 {
  font-family: var(--font-display);
  font-size: 1.45rem;
  color: var(--c-dark);
  margin-bottom: var(--space-2);
}
.page-about .about-tech-copy > p {
  font-size: .98rem;
  line-height: 1.85;
  color: var(--about-ink);
  max-width: 44rem;
}
.page-about .about-tech-pipeline {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-4);
}
.page-about .about-tech-step {
  display: flex;
  gap: var(--space-3);
  background: var(--about-panel);
  border-radius: var(--radius);
  padding: var(--space-3);
}
.page-about .about-tech-step-num {
  width: 2rem;
  height: 2rem;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-data);
  font-size: .8rem;
  color: var(--c-red);
  border: 1px solid rgba(200, 16, 46, .45);
  border-radius: 50%;
}
.page-about .about-tech-step .data-label {
  font-family: var(--font-data);
  font-size: .76rem;
  letter-spacing: .1em;
  color: var(--c-red);
  display: block;
}
.page-about .about-tech-step p {
  font-size: .9rem;
  line-height: 1.7;
  color: var(--about-ink);
  margin: .35rem 0 0;
}
.page-about .about-tech-photo {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--c-gold-border);
  margin-top: var(--space-4);
}

/* ===== 行业荣誉 ===== */
.page-about .about-honors {
  position: relative;
  padding: clamp(3.5rem, 8vw, 6rem) 0;
  background: var(--c-deep);
  overflow: hidden;
}
.page-about .about-honors::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(115deg, transparent 0 22px, rgba(0, 229, 255, .025) 22px 23px);
  pointer-events: none;
}
.page-about .about-honors .container { position: relative; z-index: 1; }
.page-about .about-honors-grid {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-3);
}
.page-about .about-honor-card {
  background: linear-gradient(145deg, var(--c-dark) 0%, #082a20 100%);
  border: 1px solid var(--c-gold-border);
  border-top: 3px solid var(--c-gold);
  border-radius: var(--radius);
  padding: var(--space-4);
  transition: var(--transition);
}
.page-about .about-honor-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  border-color: var(--c-gold);
}
.page-about .about-honor-level {
  display: inline-block;
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--c-red);
  border: 1px solid rgba(200, 16, 46, .5);
  border-radius: 999px;
  background: rgba(200, 16, 46, .08);
  padding: .3rem .7rem;
  margin-bottom: var(--space-3);
}
.page-about .about-honor-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  line-height: 1.3;
  margin-bottom: var(--space-2);
}
.page-about .about-honor-card p {
  font-size: .92rem;
  line-height: 1.75;
  color: var(--c-gray);
  margin: 0;
}

/* ===== 合作生态 ===== */
.page-about .about-eco {
  position: relative;
  padding: clamp(3.5rem, 8vw, 6rem) 0;
  color: var(--c-dark);
  overflow: hidden;
}
.page-about .about-eco::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(62deg, transparent 0 22px, rgba(200, 16, 46, .02) 22px 23px);
  pointer-events: none;
}
.page-about .about-eco .container { position: relative; z-index: 1; }
.page-about .about-eco-grid {
  display: grid;
  gap: var(--space-4);
  align-items: center;
}
.page-about .about-eco-map {
  background: var(--c-dark);
  border: 1px solid var(--c-gold-border);
  border-radius: var(--radius);
  padding: var(--space-2);
}
.page-about .about-eco-svg { display: block; width: 100%; height: auto; }
.page-about .about-ec-orbit {
  stroke: rgba(176, 141, 62, .45);
  stroke-width: 1;
  stroke-dasharray: 3 7;
  fill: none;
}
.page-about .about-ec-orbit--inner { stroke: rgba(0, 229, 255, .25); }
.page-about .about-ec-line {
  stroke: rgba(155, 168, 160, .55);
  stroke-width: 1.5;
  fill: none;
}
.page-about .about-ec-core { fill: var(--c-gold); }
.page-about .about-ec-core-name {
  fill: var(--c-dark);
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
}
.page-about .about-ec-core-sub {
  fill: var(--c-dark);
  font-family: var(--font-body);
  font-size: 11px;
}
.page-about .about-ec-node { fill: var(--c-cyan); }
.page-about .about-ec-node-text {
  fill: var(--c-dark);
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
}
.page-about .about-eco-copy h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--c-dark);
  margin-bottom: var(--space-2);
}
.page-about .about-eco-copy p {
  font-size: .98rem;
  line-height: 1.8;
  color: var(--about-ink);
  max-width: 40rem;
}
.page-about .about-eco-list {
  list-style: none;
  margin: var(--space-3) 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}
.page-about .about-eco-list li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: .95rem;
  color: var(--about-ink);
}
.page-about .about-eco-service {
  font-size: .88rem;
  line-height: 1.7;
  color: var(--about-soft);
  background: var(--about-panel);
  border-left: 3px solid var(--c-red);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: var(--space-3);
  margin: var(--space-3) 0 var(--space-3);
  max-width: 40rem;
}
.page-about .about-eco-copy .btn { margin-top: var(--space-2); }

/* ===== 尾部行动区 ===== */
.page-about .about-cta {
  position: relative;
  padding: clamp(3.5rem, 8vw, 5.5rem) 0;
  background: var(--c-dark);
  overflow: hidden;
}
.page-about .about-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--c-gold), var(--c-red));
}
.page-about .about-cta::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(118deg, transparent 0 18px, rgba(0, 229, 255, .025) 18px 19px);
  pointer-events: none;
}
.page-about .about-cta-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  align-items: flex-start;
}
.page-about .about-cta h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  margin: var(--space-2) 0 var(--space-2);
}
.page-about .about-cta p {
  color: var(--c-gray);
  font-size: 1rem;
  max-width: 36rem;
  margin-bottom: var(--space-2);
}

/* ===== 响应式断点 ===== */
@media (min-width: 720px) {
  .page-about .about-mission-stats { grid-template-columns: repeat(2, 1fr); }
  .page-about .about-honors-grid { grid-template-columns: repeat(2, 1fr); }
  .page-about .about-cta-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 860px) {
  .page-about .about-timeline::before { left: 50%; }
  .page-about .about-tl-item { padding-left: 0; }
  .page-about .about-tl-dot { left: 50%; }
  .page-about .about-tl-card { width: calc(50% - var(--space-5)); }
  .page-about .about-tl-item--alt .about-tl-card {
    margin-left: calc(50% + var(--space-5));
    border-right: 3px solid var(--c-gold);
    border-left: 1px solid var(--c-gold-border);
    width: calc(50% - var(--space-5));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-layout {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
  .page-about .about-mission-grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

@media (min-width: 920px) {
  .page-about .about-tech-layout {
    grid-template-columns: minmax(300px, 420px) 1fr;
    align-items: start;
  }
  .page-about .about-eco-grid {
    grid-template-columns: minmax(320px, 1fr) 1fr;
  }
}

@media (min-width: 1080px) {
  .page-about .about-honors-grid { grid-template-columns: repeat(4, 1fr); }
}