.page-about {
  background: var(--c-off-white);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 2rem 0 2.5rem;
  background:
    radial-gradient(circle at 85% 20%, rgba(230, 57, 70, 0.35), transparent 26rem),
    linear-gradient(135deg, var(--c-deep-blue) 0%, #0D2B52 55%, var(--c-deep-blue) 100%);
  color: var(--c-text-light);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: -6rem;
  width: 30%;
  height: 100%;
  background: linear-gradient(180deg, var(--c-red), transparent 90%);
  transform: skewX(-18deg);
  opacity: 0.22;
  pointer-events: none;
}
.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 2rem;
  align-items: center;
}
.page-about .about-hero .breadcrumb__link,
.page-about .about-hero .breadcrumb__current {
  color: var(--c-text-light);
}
.page-about .about-hero__kicker {
  margin: 0.9rem 0 0.4rem;
  font-family: var(--font-head);
  letter-spacing: 0.28em;
  color: var(--c-neon-green);
}
.page-about .about-hero h1 {
  font-family: var(--font-head);
  font-size: 2rem;
  line-height: 1.12;
  max-width: 14em;
  margin: 0.4rem 0 0.9rem;
  text-wrap: balance;
}
.page-about .about-hero__lead {
  max-width: 58ch;
  color: rgba(245, 247, 250, 0.88);
  line-height: 1.7;
  font-size: 1rem;
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.6rem;
}
.page-about .about-hero .btn--ghost {
  border-color: rgba(245, 247, 250, 0.72);
  color: var(--c-text-light);
}
.page-about .about-hero .btn--ghost:hover {
  background: rgba(245, 247, 250, 0.1);
}
.page-about .about-hero__figure {
  position: relative;
  margin: 0;
}
.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  left: -1rem;
  bottom: -0.8rem;
  width: 3.5rem;
  height: 3.5rem;
  background: var(--c-neon-green);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 22% 100%);
  opacity: 0.7;
  z-index: 0;
}
.page-about .about-hero__figure img {
  width: 100%;
  height: auto;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}
.page-about .about-hero__figure figcaption {
  margin-top: 0.7rem;
  font-family: var(--font-head);
  font-size: 0.82rem;
  letter-spacing: 0.3em;
  color: rgba(245, 247, 250, 0.7);
}

/* 板块标题 */
.page-about .about-section-head {
  margin-bottom: 2rem;
}
.page-about .about-section-head h2 {
  font-family: var(--font-head);
  font-size: 1.9rem;
  line-height: 1.2;
  margin: 0.35rem 0 0;
  letter-spacing: 0.02em;
}
.page-about .about-section-head__desc {
  margin: 0.5rem 0 0;
  max-width: 62ch;
  color: var(--c-steel-blue);
  line-height: 1.65;
}
.page-about .about-section-head--light {
  color: var(--c-text-light);
}
.page-about .about-section-head--light .about-section-head__desc {
  color: rgba(245, 247, 250, 0.7);
}
.page-about .about-journey .section-kicker,
.page-about .about-tech .section-kicker,
.page-about .about-hero .section-kicker {
  color: var(--c-neon-green);
}
.page-about .about-capability .section-kicker,
.page-about .about-eco .section-kicker {
  color: var(--c-red);
}

/* 01 时间轴 */
.page-about .about-journey {
  background: var(--c-deep-blue);
  color: var(--c-text-light);
  padding: 3.2rem 0;
}
.page-about .about-journey .about-section-head h2,
.page-about .about-journey .section-kicker {
  color: var(--c-text-light);
}
.page-about .about-journey .section-kicker {
  color: var(--c-neon-green);
}
.page-about .journey-timeline {
  position: relative;
  margin-top: 2.5rem;
}
.page-about .journey-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--c-red), var(--c-steel-blue) 55%, var(--c-neon-green));
  opacity: 0.85;
}
.page-about .journey-item {
  position: relative;
  padding: 0 0 1.8rem 2.4rem;
}
.page-about .journey-item:last-child {
  padding-bottom: 0;
}
.page-about .journey-item__marker {
  position: absolute;
  left: 0;
  top: 0.7rem;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background: var(--c-neon-green);
  border: 4px solid var(--c-deep-blue);
  box-shadow: 0 0 0 3px rgba(57, 255, 20, 0.45);
  transition: var(--transition);
}
.page-about .journey-item:hover .journey-item__marker {
  background: var(--c-red);
  box-shadow: 0 0 0 5px rgba(230, 57, 70, 0.35);
  transform: scale(1.12);
}
.page-about .journey-item__panel {
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-left: 3px solid var(--c-red);
  padding: 1.1rem 1.2rem;
  clip-path: var(--clip-panel);
  transition: var(--transition);
}
.page-about .journey-item:hover .journey-item__panel {
  background: rgba(230, 57, 70, 0.15);
  border-left-color: var(--c-neon-green);
  transform: translateX(3px);
}
.page-about .journey-item__year {
  font-family: var(--font-head);
  color: var(--c-neon-green);
  font-size: 1.2rem;
  display: inline-block;
  margin-bottom: 0.25rem;
}
.page-about .journey-item__panel h3 {
  font-family: var(--font-head);
  font-size: 1.12rem;
  margin: 0 0 0.4rem;
}
.page-about .journey-item__panel p {
  margin: 0;
  color: rgba(245, 247, 250, 0.8);
  line-height: 1.68;
  font-size: 0.96rem;
}

/* 02 服务能力 */
.page-about .about-capability {
  background: linear-gradient(180deg, var(--c-off-white), #EEF3F8);
  color: var(--c-text-dark);
  padding: 3.2rem 0;
}
.page-about .capability-grid {
  display: grid;
  gap: 2rem;
}
.page-about .capability-grid__intro p {
  line-height: 1.7;
  color: var(--c-text-dark);
  margin: 0 0 1.4rem;
  max-width: 60ch;
}
.page-about .capability-grid__figure {
  position: relative;
  margin: 0;
}
.page-about .capability-grid__figure img {
  width: 100%;
  height: auto;
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}
.page-about .capability-grid__figure figcaption,
.page-about .eco-grid__figure figcaption {
  margin-top: 0.6rem;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  color: var(--c-steel-blue);
}
.page-about .capability-stats {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: 1fr;
}
.page-about .stat-card {
  background: var(--c-text-light);
  border-left: 4px solid var(--c-red);
  padding: 1rem 1.2rem 1.1rem;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  box-shadow: 0 6px 18px rgba(10, 31, 60, 0.07);
  transition: var(--transition);
}
.page-about .stat-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 26px rgba(10, 31, 60, 0.12);
  border-left-color: var(--c-neon-green);
}
.page-about .stat-card--accent {
  background: var(--c-deep-blue);
  border-left-color: var(--c-neon-green);
  color: var(--c-text-light);
}
.page-about .stat-card__num {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 2.3rem;
  line-height: 1;
  color: var(--c-deep-blue);
}
.page-about .stat-card--accent .stat-card__num {
  color: var(--c-neon-green);
}
.page-about .stat-card__unit {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--c-steel-blue);
  margin-left: 0.2rem;
}
.page-about .stat-card--accent .stat-card__unit {
  color: rgba(245, 247, 250, 0.7);
}
.page-about .stat-card h3 {
  font-family: var(--font-head);
  font-size: 1rem;
  margin: 0.55rem 0 0.2rem;
  letter-spacing: 0.04em;
}
.page-about .stat-card p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--c-steel-blue);
  line-height: 1.4;
}
.page-about .stat-card--accent p {
  color: rgba(245, 247, 250, 0.72);
}

/* 03 技术特色 */
.page-about .about-tech {
  background: var(--c-deep-blue);
  color: var(--c-text-light);
  padding: 3.2rem 0;
}
.page-about .tech-grid {
  display: grid;
  gap: 1rem;
}
.page-about .tech-card {
  position: relative;
  background: linear-gradient(135deg, rgba(230, 57, 70, 0.18), rgba(42, 78, 110, 0.1));
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1.6rem 1.4rem 1.8rem;
  clip-path: var(--clip-panel);
  transition: var(--transition);
}
.page-about .tech-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 52px;
  height: 5px;
  background: var(--c-red);
  transition: var(--transition);
}
.page-about .tech-card:hover {
  border-color: var(--c-neon-green);
  transform: translateY(-6px);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.25);
}
.page-about .tech-card:hover::before {
  background: var(--c-neon-green);
  width: 76px;
}
.page-about .tech-card__num {
  font-family: var(--font-head);
  font-size: 0.8rem;
  color: var(--c-neon-green);
  letter-spacing: 0.24em;
}
.page-about .tech-card h3 {
  font-family: var(--font-head);
  font-size: 1.18rem;
  line-height: 1.4;
  margin: 0.5rem 0 0.7rem;
}
.page-about .tech-card p {
  margin: 0 0 0.8rem;
  color: rgba(245, 247, 250, 0.78);
  line-height: 1.68;
  font-size: 0.94rem;
}
.page-about .tech-card__link {
  display: inline-block;
  color: var(--c-neon-green);
  text-decoration: none;
  border-bottom: 1px solid rgba(57, 255, 20, 0.45);
  padding-bottom: 2px;
  font-size: 0.92rem;
  transition: var(--transition);
}
.page-about .tech-card__link:hover {
  border-color: var(--c-neon-green);
  color: var(--c-text-light);
}

/* 04 合作与生态 */
.page-about .about-eco {
  background: linear-gradient(180deg, #EEF3F8, var(--c-off-white));
  color: var(--c-text-dark);
  padding: 3.2rem 0;
}
.page-about .eco-grid {
  display: grid;
  gap: 2rem;
}
.page-about .eco-grid__text p {
  line-height: 1.7;
  margin: 0 0 1.4rem;
  max-width: 60ch;
}
.page-about .eco-grid__figure {
  margin: 0;
}
.page-about .eco-grid__figure img {
  width: 100%;
  height: auto;
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}
.page-about .eco-map__wall {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.55rem;
}
.page-about .eco-map__tile {
  min-height: 78px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: var(--c-deep-blue);
  color: var(--c-text-light);
  font-family: var(--font-head);
  font-size: 0.82rem;
  line-height: 1.45;
  text-align: center;
  padding: 0.5rem 0.3rem;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: var(--transition);
}
.page-about .eco-map__tile:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 18px rgba(155, 27, 45, 0.2);
}
.page-about .eco-map__tile--red {
  background: var(--c-red);
}
.page-about .eco-map__tile--green {
  background: var(--c-steel-blue);
  color: var(--c-neon-green);
}
.page-about .eco-map__note {
  margin: 1.2rem 0 0;
  padding: 1rem 1.1rem;
  background: var(--c-text-light);
  border-left: 4px solid var(--c-red);
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--c-text-dark);
  box-shadow: 0 6px 18px rgba(10, 31, 60, 0.06);
}

/* 响应式 */
@media (min-width: 600px) {
  .page-about .about-hero h1 {
    font-size: 2.5rem;
  }
  .page-about .capability-stats {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .eco-map__wall {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .eco-map__tile {
    min-height: 90px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 3.5rem 0 4rem;
  }
  .page-about .about-hero__grid {
    grid-template-columns: 1.08fr 0.92fr;
    gap: 3rem;
  }
  .page-about .about-hero h1 {
    font-size: 3rem;
  }
  .page-about .about-hero__lead {
    font-size: 1.05rem;
  }
  .page-about .about-section-head h2 {
    font-size: 2.5rem;
  }
  .page-about .about-journey,
  .page-about .about-capability,
  .page-about .about-tech,
  .page-about .about-eco {
    padding: 4.5rem 0;
  }
  .page-about .capability-grid {
    grid-template-columns: 0.8fr 1.2fr;
    gap: 2.5rem;
  }
  .page-about .capability-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
  }
  .page-about .stat-card {
    padding: 1.15rem 1.2rem 1.25rem;
  }
  .page-about .tech-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.4rem;
  }
  .page-about .tech-card {
    padding: 2rem 1.6rem 2.2rem;
  }
  .page-about .eco-grid {
    grid-template-columns: 0.85fr 1.15fr;
    gap: 2.5rem;
    align-items: start;
  }
  .page-about .journey-timeline {
    margin-top: 3.5rem;
  }
  .page-about .journey-timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }
  .page-about .journey-item {
    width: 50%;
    padding: 0 3.2rem 3rem 0;
    text-align: right;
  }
  .page-about .journey-item:nth-child(even) {
    margin-left: 50%;
    padding: 0 0 3rem 3.2rem;
    text-align: left;
  }
  .page-about .journey-item__marker {
    left: auto;
    right: -8px;
    top: 0.8rem;
  }
  .page-about .journey-item:nth-child(even) .journey-item__marker {
    right: auto;
    left: -8px;
  }
  .page-about .journey-item__panel {
    border-left-width: 0;
    border-right: 3px solid var(--c-red);
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  }
  .page-about .journey-item:nth-child(even) .journey-item__panel {
    border-right-width: 0;
    border-left: 3px solid var(--c-red);
    clip-path: var(--clip-panel);
  }
  .page-about .journey-item:hover .journey-item__panel {
    transform: translateX(-4px);
  }
  .page-about .journey-item:nth-child(even):hover .journey-item__panel {
    transform: translateX(4px);
  }
}