.page-about {
  --about-accent-glow: rgba(255, 107, 0, 0.12);
  --about-radius: 14px;
  background: var(--c-bg);
  color: var(--c-text);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .section {
  padding: 56px 0;
}

.page-about h2,
.page-about h3 {
  color: var(--c-text);
}

/* ===== 首屏 Hero ===== */
.page-about .about-hero {
  position: relative;
  padding: 48px 0 56px;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -12%;
  width: 60%;
  height: 140%;
  background: linear-gradient(135deg, transparent 30%, var(--about-accent-glow) 100%);
  clip-path: polygon(25% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: start;
}

.page-about .about-hero__crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-text-dim);
  margin-bottom: 16px;
}

.page-about .about-hero__crumb a {
  color: var(--c-accent);
  text-decoration: none;
}

.page-about .about-hero__crumb a:hover,
.page-about .about-hero__crumb a:focus-visible {
  text-decoration: underline;
}

.page-about .about-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--c-accent);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.page-about .about-hero__eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--c-accent);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-size: 30px;
  line-height: 1.15;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  margin: 0 0 20px;
}

.page-about .about-hero__lead {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-text-dim);
  max-width: 640px;
  margin: 0 0 32px;
}

.page-about .about-hero__stats {
  display: grid;
  gap: 16px;
}

.page-about .about-hero__stat {
  position: relative;
  padding-left: 16px;
}

.page-about .about-hero__stat::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 3px;
  border-radius: 2px;
  background: linear-gradient(to bottom, var(--c-accent), var(--c-accent-soft));
}

.page-about .about-hero__stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 30px;
  line-height: 1.1;
}

.page-about .about-hero__stat-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-text-dim);
  margin-top: 4px;
}

.page-about .about-hero__visual {
  position: relative;
}

.page-about .about-hero__visual::before {
  content: "";
  position: absolute;
  inset: 14px -10px -10px 14px;
  border: 2px solid rgba(255, 107, 0, 0.3);
  border-radius: 18px;
  transform: rotate(-2deg);
}

.page-about .about-hero__visual img {
  position: relative;
  border-radius: var(--about-radius);
  border: 1px solid var(--c-border);
  transform: rotate(1deg);
}

/* ===== 品牌故事 ===== */
.page-about .about-story {
  border-top: 1px solid var(--c-border);
  background: linear-gradient(90deg, transparent 0%, rgba(18, 41, 77, 0.35) 60%);
}

.page-about .about-story__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .about-story__aside-note {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-text-dim);
  margin: 0;
}

.page-about .about-story__body h2,
.page-about .about-milestones__head h2,
.page-about .about-team__content h2,
.page-about .about-capabilities__head h2,
.page-about .about-awards__head h2 {
  font-family: var(--font-display);
  font-size: 24px;
  line-height: 1.2;
  margin: 0 0 16px;
}

.page-about .about-story__body p,
.page-about .about-team__content p,
.page-about .about-capabilities__card p,
.page-about .about-awards__card p {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.8;
  color: var(--c-text-dim);
}

.page-about .about-story__body p + p {
  margin-top: 14px;
}

.page-about .about-story__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

/* ===== 里程碑 ===== */
.page-about .about-milestones {
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  background: linear-gradient(180deg, var(--c-bg) 0%, rgba(18, 41, 77, 0.45) 50%, var(--c-bg) 100%);
}

.page-about .about-milestones__head {
  max-width: 720px;
  margin-bottom: 40px;
}

.page-about .about-milestones__sub {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-text-dim);
  margin: 0;
}

.page-about .about-timeline {
  position: relative;
  margin-bottom: 32px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 4px;
  bottom: 4px;
  left: 11px;
  width: 1px;
  background: linear-gradient(to bottom, var(--c-accent), var(--c-border) 70%);
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 4px 16px;
  padding-bottom: 28px;
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__node {
  grid-column: 1;
  grid-row: 1 / span 2;
  justify-self: center;
  width: 12px;
  height: 12px;
  margin-top: 6px;
  border-radius: 50%;
  background: var(--c-accent);
  border: 3px solid var(--c-bg);
  box-shadow: 0 0 0 1px var(--c-accent);
  z-index: 1;
}

.page-about .about-timeline__year {
  grid-column: 2;
  grid-row: 1;
  font-family: var(--font-display);
  font-size: 26px;
  line-height: 1.1;
  color: var(--c-accent);
  transition: color 0.18s ease;
}

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

.page-about .about-timeline__content {
  grid-column: 2;
  grid-row: 2;
}

.page-about .about-timeline__content h3 {
  font-family: var(--font-display);
  font-size: 17px;
  margin: 0 0 6px;
}

.page-about .about-timeline__content p {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-text-dim);
  margin: 0;
}

.page-about .about-timeline__item--current .about-timeline__content {
  background: rgba(18, 41, 77, 0.7);
  border: 1px solid rgba(255, 107, 0, 0.35);
  border-radius: 12px;
  padding: 14px 16px;
}

.page-about .about-milestones__visual img {
  display: block;
  border-radius: var(--about-radius);
  border: 1px solid var(--c-border);
}

/* ===== 数据团队 ===== */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-team__list {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  display: grid;
  gap: 12px;
}

.page-about .about-team__list li {
  position: relative;
  padding-left: 22px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-text);
}

.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 10px;
  height: 2px;
  background: var(--c-accent);
}

.page-about .about-team__visual img {
  display: block;
  width: 100%;
  border-radius: var(--about-radius);
  border: 1px solid var(--c-border);
}

/* ===== 优势与能力 ===== */
.page-about .about-capabilities {
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  background: linear-gradient(180deg, var(--c-bg) 0%, rgba(18, 41, 77, 0.4) 50%, var(--c-bg) 100%);
}

.page-about .about-capabilities__head {
  max-width: 760px;
  margin-bottom: 32px;
}

.page-about .about-capabilities__sub {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-text-dim);
  margin: 0;
}

.page-about .about-capabilities__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 36px;
}

.page-about .about-capabilities__card {
  position: relative;
  background: rgba(18, 41, 77, 0.75);
  border: 1px solid var(--c-border);
  border-radius: var(--about-radius);
  padding: 20px;
  transition: transform 0.18s ease, border-color 0.18s ease;
}

.page-about .about-capabilities__card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 107, 0, 0.5);
}

.page-about .about-capabilities__card-num {
  position: absolute;
  top: 16px;
  right: 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: rgba(255, 107, 0, 0.6);
}

.page-about .about-capabilities__card h3 {
  font-family: var(--font-display);
  font-size: 18px;
  margin: 0 0 8px;
}

.page-about .about-capabilities__card p {
  margin: 0;
}

.page-about .about-chart {
  background: var(--c-panel);
  border: 1px solid var(--c-border);
  border-radius: 16px;
  padding: 20px 16px;
  margin-bottom: 28px;
}

.page-about .about-chart__head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 4px 16px;
  margin-bottom: 12px;
}

.page-about .about-chart__head h3 {
  font-family: var(--font-display);
  font-size: 16px;
  margin: 0;
}

.page-about .about-chart__head p {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-text-dim);
  margin: 0;
}

.page-about .about-chart__svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-chart__axis {
  stroke: var(--c-border);
  stroke-width: 1;
}

.page-about .about-chart__line {
  fill: none;
  stroke: var(--c-accent);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: stroke 0.18s ease;
}

.page-about .about-chart:hover .about-chart__line {
  stroke: var(--c-accent-soft);
}

.page-about .about-chart__points circle {
  fill: var(--c-accent);
  stroke: var(--c-bg);
  stroke-width: 2;
}

.page-about .about-chart__labels text {
  font-family: var(--font-mono);
  font-size: 12px;
  fill: var(--c-text-dim);
}

.page-about .about-chart__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--c-border);
}

.page-about .about-chart__legend span {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-text-dim);
}

.page-about .about-capabilities__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== 资质与荣誉 ===== */
.page-about .about-awards {
  background: var(--c-bg-deep);
}

.page-about .about-awards__head {
  margin-bottom: 32px;
}

.page-about .about-awards__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-awards__card {
  position: relative;
  overflow: hidden;
  background: rgba(10, 30, 60, 0.6);
  border: 1px solid var(--c-border);
  border-radius: var(--about-radius);
  padding: 22px;
}

.page-about .about-awards__card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, transparent 50%, rgba(255, 107, 0, 0.18) 50%);
}

.page-about .about-awards__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-accent);
  border: 1px solid rgba(255, 107, 0, 0.35);
  border-radius: 999px;
  padding: 3px 10px;
  margin-bottom: 14px;
}

.page-about .about-awards__card h3 {
  font-family: var(--font-display);
  font-size: 18px;
  margin: 0 0 8px;
}

.page-about .about-awards__card p {
  margin: 0;
}

.page-about .about-awards__trust {
  margin-top: 32px;
  padding: 24px 20px;
  border-left: 3px solid var(--c-accent);
  background: rgba(18, 41, 77, 0.5);
}

.page-about .about-awards__trust p {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-text);
  margin: 0 0 16px;
}

.page-about .about-awards__trust-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== 通用索引标签 ===== */
.page-about .about-story__index,
.page-about .about-milestones__index,
.page-about .about-team__index,
.page-about .about-capabilities__index,
.page-about .about-awards__index {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-accent);
  text-transform: uppercase;
  margin: 0 0 12px;
}

.page-about .about-story__index::before,
.page-about .about-milestones__index::before,
.page-about .about-team__index::before,
.page-about .about-capabilities__index::before,
.page-about .about-awards__index::before {
  content: "";
  width: 20px;
  height: 1px;
  background: var(--c-accent);
}

/* ===== 桌面端 ===== */
@media (min-width: 768px) {
  .page-about .section {
    padding: 80px 0;
  }

  .page-about .about-hero__inner {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
  }

  .page-about .about-hero h1 {
    font-size: 44px;
  }

  .page-about .about-hero__lead {
    font-size: 15px;
  }

  .page-about .about-hero__stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about .about-hero__stat-num {
    font-size: 36px;
  }

  .page-about .about-hero__visual::before {
    inset: 18px -18px -18px 18px;
  }

  .page-about .about-story__grid {
    grid-template-columns: 220px 1fr;
    gap: 48px;
  }

  .page-about .about-story__body h2,
  .page-about .about-milestones__head h2,
  .page-about .about-team__content h2,
  .page-about .about-capabilities__head h2,
  .page-about .about-awards__head h2 {
    font-size: 32px;
  }

  .page-about .about-timeline::before {
    left: 176px;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 140px 40px 1fr;
    gap: 4px 16px;
  }

  .page-about .about-timeline__node {
    grid-column: 2;
  }

  .page-about .about-timeline__year {
    grid-column: 1;
    text-align: right;
    font-size: 32px;
  }

  .page-about .about-timeline__content {
    grid-column: 3;
  }

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

  .page-about .about-capabilities__cards {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .page-about .about-awards__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-about .about-awards__trust {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 28px;
  }

  .page-about .about-awards__trust p {
    margin: 0;
    max-width: 640px;
  }

  .page-about .about-awards__trust-links {
    flex-shrink: 0;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero h1 {
    font-size: 54px;
  }

  .page-about .about-capabilities__cards {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-chart {
    padding: 28px;
  }
}