.page-about {
  --about-border: rgba(176, 184, 200, 0.15);
  position: relative;
  background:
    linear-gradient(135deg, rgba(0, 255, 163, 0.05) 0%, transparent 26%),
    radial-gradient(circle at 88% 6%, rgba(255, 61, 46, 0.14) 0%, transparent 30%),
    var(--color-bg);
  color: var(--color-paper);
}

.page-about .breadcrumb-wrap {
  padding-top: var(--space-4);
}

.page-about .container {
  max-width: 1200px;
  width: 100%;
}

.page-about .section-head .marker,
.page-about .section-kicker .marker {
  margin-right: var(--space-2);
}

/* ---------- Hero 愿景区 ---------- */
.page-about .hero-vision__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  padding-top: var(--space-4);
  padding-bottom: var(--space-6);
}

.page-about .hero-vision__copy {
  position: relative;
  z-index: 1;
}

.page-about .hero-vision__copy::before {
  content: "";
  display: block;
  width: 72px;
  height: 8px;
  background: var(--color-hot);
  margin-bottom: var(--space-4);
}

.page-about .hero-vision h1 {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(1.9rem, 5vw, 3rem);
  line-height: 1.18;
  letter-spacing: 0.02em;
  color: var(--color-paper);
  margin: 0 0 var(--space-3);
}

.page-about .hero-vision__lead {
  font-family: var(--font-data);
  font-size: 1.05rem;
  color: var(--color-accent);
  letter-spacing: 0.06em;
  margin-bottom: var(--space-4);
}

.page-about .hero-vision__body {
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-gray);
  margin-bottom: var(--space-5);
  font-weight: 300;
}

.page-about .hero-vision__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.page-about .hero-vision__art {
  position: relative;
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-bg-light) 100%);
  padding: var(--space-2);
  border: 2px solid var(--color-bg-light);
  box-shadow: var(--space-5) var(--space-5) 0 rgba(255, 61, 46, 0.12);
  transition: box-shadow 0.25s ease;
}

.page-about .hero-vision__art:hover {
  box-shadow: var(--space-5) var(--space-5) 0 rgba(0, 255, 163, 0.14);
}

.page-about .hero-vision__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: calc(var(--radius) + 2px);
}

/* ---------- 时间线 ---------- */
.page-about .timeline-section {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

.page-about .timeline {
  position: relative;
  display: grid;
  gap: var(--space-5);
  margin-top: var(--space-6);
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 14px;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-accent) 0%, var(--color-hot) 85%, transparent 100%);
  opacity: 0.85;
}

.page-about .timeline__item {
  position: relative;
  padding-left: var(--space-6);
}

.page-about .timeline__node {
  position: absolute;
  left: 8px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 4px var(--color-bg), 0 0 0 7px rgba(0, 255, 163, 0.18);
}

.page-about .timeline__num {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.page-about .timeline__card {
  background: linear-gradient(160deg, var(--color-bg-light) 0%, var(--color-bg-dark) 100%);
  border: 2px solid var(--about-border);
  border-radius: var(--radius);
  padding: var(--space-4);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.22);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-about .timeline__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 36px rgba(0, 0, 0, 0.34);
  border-color: var(--border-green);
}

.page-about .timeline__card h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-paper);
  margin: 0 0 var(--space-2);
}

.page-about .timeline__card p {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-gray);
  margin-bottom: var(--space-3);
  font-weight: 300;
}

/* ---------- 数据与联赛覆盖 ---------- */
.page-about .league-section {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
  border-top: 2px solid var(--color-bg-light);
  border-bottom: 2px solid var(--color-bg-light);
  background: linear-gradient(180deg, rgba(255, 61, 46, 0.04) 0%, transparent 30%);
}

.page-about .league-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.page-about .league-card {
  position: relative;
  padding: var(--space-4);
  background: var(--color-bg-dark);
  border: 2px solid var(--about-border);
  border-radius: var(--radius);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.page-about .league-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 100%;
  background: var(--color-accent);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.page-about .league-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-green);
}

.page-about .league-card:hover::before {
  opacity: 1;
}

.page-about .league-card__code {
  display: block;
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.page-about .league-card__title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--color-paper);
  margin: 0 0 var(--space-1);
}

.page-about .league-card__name {
  font-size: 0.82rem;
  color: var(--color-gray);
  margin-bottom: var(--space-3);
  line-height: 1.4;
}

.page-about .league-card__meta {
  font-family: var(--font-data);
  font-size: 0.72rem;
  line-height: 1.6;
  color: var(--color-accent);
  opacity: 0.45;
  transition: opacity 0.2s ease;
}

.page-about .league-card:hover .league-card__meta {
  opacity: 1;
}

.page-about .league-media {
  margin-top: var(--space-5);
  background: var(--color-bg-dark);
  border: 2px solid var(--color-bg-light);
  padding: var(--space-2);
}

.page-about .league-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .pipeline {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.page-about .pipeline__step {
  position: relative;
  background: var(--color-bg-light);
  border-left: 3px solid var(--color-accent);
  padding: var(--space-4);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.page-about .pipeline__step .marker {
  display: inline-block;
  margin-bottom: var(--space-3);
}

.page-about .pipeline__step h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--color-paper);
  margin: 0 0 var(--space-2);
}

.page-about .pipeline__step p {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--color-gray);
  margin: 0;
  font-weight: 300;
}

.page-about .league-panel {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-5);
}

.page-about .league-panel .data-panel {
  background: var(--color-bg-dark);
  border: 2px solid var(--border-green);
}

.page-about .league-panel__note {
  margin: 0;
  padding: var(--space-4);
  background: rgba(0, 255, 163, 0.06);
  border-left: 4px solid var(--color-accent);
  color: var(--color-gray);
  font-size: 0.95rem;
  line-height: 1.7;
  font-weight: 300;
}

/* ---------- 团队与技术 ---------- */
.page-about .team-section {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.page-about .team-card {
  position: relative;
  padding: var(--space-5) var(--space-4) var(--space-4);
  background: linear-gradient(180deg, var(--color-bg-light) 0%, var(--color-bg-dark) 120%);
  border: 2px solid var(--about-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .team-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, transparent 48%, rgba(0, 255, 163, 0.15) 48%);
}

.page-about .team-card h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--color-paper);
  margin: 0 0 var(--space-2);
}

.page-about .team-card p {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--color-gray);
  margin: 0;
  font-weight: 300;
}

.page-about .tech-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  margin-top: var(--space-6);
}

.page-about .tech-layout__media {
  background: var(--color-bg-dark);
  border: 2px solid var(--color-bg-light);
  padding: var(--space-2);
}

.page-about .tech-layout__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .tech-layout__details {
  display: grid;
  gap: var(--space-3);
  align-content: start;
}

.page-about .tech-detail {
  background: var(--color-bg-dark);
  border: 2px solid var(--about-border);
  border-radius: var(--radius);
  transition: border-color 0.2s ease;
}

.page-about .tech-detail[open] {
  border-color: var(--border-green);
}

.page-about .tech-detail summary {
  cursor: pointer;
  padding: var(--space-4);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1rem;
  color: var(--color-paper);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.page-about .tech-detail summary::-webkit-details-marker {
  display: none;
}

.page-about .tech-detail summary::after {
  content: "+";
  font-family: var(--font-data);
  font-size: 1.3rem;
  color: var(--color-accent);
  line-height: 1;
  transition: transform 0.2s ease;
}

.page-about .tech-detail[open] summary::after {
  content: "−";
}

.page-about .tech-detail__body {
  padding: 0 var(--space-4) var(--space-4);
}

.page-about .tech-detail__body p {
  color: var(--color-gray);
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: var(--space-3);
  font-weight: 300;
}

.page-about .tech-layout__details .btn {
  justify-self: start;
  margin-top: var(--space-2);
}

/* ---------- 资质与合作 ---------- */
.page-about .crest-section {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
  background: radial-gradient(circle at 20% 20%, rgba(255, 61, 46, 0.05) 0%, transparent 34%);
  border-top: 2px solid var(--color-bg-light);
}

.page-about .honor-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.page-about .honor-item {
  display: grid;
  gap: var(--space-2);
  justify-items: start;
  padding: var(--space-4);
  background: var(--color-bg-dark);
  border: 2px solid var(--about-border);
  border-radius: var(--radius);
}

.page-about .honor-item__icon {
  width: 26px;
  height: 26px;
  color: var(--color-accent);
}

.page-about .honor-item__label {
  font-size: 0.82rem;
  color: var(--color-gray);
  margin: 0;
}

.page-about .honor-item__value {
  font-family: var(--font-data);
  font-size: 1rem;
  letter-spacing: 0.04em;
  color: var(--color-paper);
  font-weight: 600;
}

.page-about .crest-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.page-about .crest-card {
  position: relative;
  padding: var(--space-5) var(--space-4);
  background: var(--color-paper);
  border-radius: var(--radius);
  color: var(--color-ink);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 18% 100%);
}

.page-about .crest-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 6px;
  height: 100%;
  background: var(--color-hot);
}

.page-about .crest-card__title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 900;
  color: var(--color-ink);
  margin: 0 0 var(--space-2);
}

.page-about .crest-card__text {
  font-size: 0.92rem;
  line-height: 1.65;
  color: #3d4554;
  margin: 0;
  font-weight: 400;
  word-break: break-word;
}

.page-about .crest-note {
  margin-top: var(--space-5);
  padding: var(--space-4);
  background: rgba(0, 255, 163, 0.06);
  border: 1px dashed var(--border-green);
  border-radius: var(--radius);
}

.page-about .crest-note p {
  color: var(--color-gray);
  font-size: 0.95rem;
  line-height: 1.7;
  margin: 0 0 var(--space-2);
  font-weight: 300;
  max-width: 80ch;
}

.page-about .crest-note p:last-child {
  margin-bottom: 0;
}

/* ---------- 响应式：平板 ---------- */
@media (min-width: 768px) {
  .page-about .hero-vision__layout {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
  }

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

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

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

  .page-about .crest-card {
    clip-path: polygon(0 0, 100% 0, 100% 100%, 8% 100%);
  }
}

/* ---------- 响应式：桌面 ---------- */
@media (min-width: 1024px) {
  .page-about .hero-vision__art {
    transform: rotate(-1.6deg);
  }

  .page-about .timeline {
    gap: var(--space-6);
  }

  .page-about .timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .timeline__item {
    width: 50%;
    padding-left: 0;
    padding-right: var(--space-6);
    text-align: right;
  }

  .page-about .timeline__node {
    left: auto;
    right: -8px;
    top: 10px;
  }

  .page-about .timeline__item:nth-child(even) {
    margin-left: 50%;
    padding-right: 0;
    padding-left: var(--space-6);
    text-align: left;
  }

  .page-about .timeline__item:nth-child(even) .timeline__node {
    right: auto;
    left: -8px;
  }

  .page-about .timeline__item:nth-child(odd) .timeline__card {
    border-right-color: var(--border-green);
  }

  .page-about .leagues-grid {
    grid-template-columns: repeat(6, 1fr);
  }

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

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

  .page-about .tech-layout {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    align-items: start;
  }

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

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

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

@media (min-width: 1024px) {
  .page-about .league-grid {
    grid-template-columns: repeat(6, 1fr);
  }
}