/* ========== 关于沙巴体育 · 品牌介绍页专属样式 ========== */
.page-about {
  --about-gold: var(--sb-c-gold);
  --about-neon: var(--sb-c-neon);
  --about-ember: var(--sb-c-ember);
  --about-line: var(--sb-c-line);
  --about-muted: var(--sb-c-muted);
  --about-gray: var(--sb-c-gray);
}

/* ===== 面包屑 ===== */
.page-about__crumb {
  padding-top: 20px;
  padding-bottom: 0;
  font-size: 0.875rem;
}

.page-about .sb-breadcrumbs {
  columns: auto;
}

.page-about .sb-breadcrumbs__item {
  transition: color var(--sb-transition);
}

.page-about .sb-breadcrumbs__item[aria-current="page"] {
  color: var(--about-neon);
  font-family: var(--sb-font-data);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
}

.page-about .sb-breadcrumbs__sep {
  color: var(--about-muted);
  margin: 0 6px;
}

/* ===== 首屏 Hero ===== */
.page-about__hero {
  position: relative;
  overflow: hidden;
  padding: 48px 0 72px;
  background-color: var(--sb-c-ink);
}

.page-about__hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--sb-c-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--sb-c-line) 1px, transparent 1px);
  background-size: 36px 36px;
  opacity: 0.45;
  pointer-events: none;
}

.page-about__hero::after {
  content: '';
  position: absolute;
  top: 0;
  right: -70px;
  width: 280px;
  height: 280px;
  background: linear-gradient(135deg, transparent 46%, var(--about-neon) 46%, var(--about-neon) 52%, transparent 52%);
  opacity: 0.12;
  pointer-events: none;
}

.page-about__hero-layout {
  position: relative;
  z-index: 1;
  row-gap: 40px;
}

.page-about__hero-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
}

.page-about__hero-title {
  font-family: var(--sb-font-display);
  font-weight: 900;
  font-size: clamp(2.2rem, 7vw, 3.9rem);
  line-height: 1.04;
  letter-spacing: 0.01em;
  margin: 0;
  color: var(--sb-c-white);
  transform: skewX(calc(var(--sb-skew) * -0.5));
}

.page-about__hero-line {
  display: block;
}

.page-about__hero-line--zh {
  font-size: 1em;
}

.page-about__hero-line--en {
  font-size: 0.5em;
  font-family: var(--sb-font-body);
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--about-neon);
  text-transform: none;
  transform: skewX(1deg);
}

.page-about__hero-desc {
  color: var(--about-gray);
  font-size: 1rem;
  line-height: 1.7;
  max-width: 34em;
  margin: 0;
}

.page-about__hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.page-about__hero-panel {
  position: relative;
}

.page-about__hero-frame {
  position: relative;
  background: rgba(10, 26, 47, 0.78);
  border: 1px solid var(--sb-c-line);
  border-radius: calc(var(--sb-radius) + 2px);
  padding: 22px;
  backdrop-filter: blur(6px);
}

.page-about__hero-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px 16px;
}

.page-about__hero-stat {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.page-about__hero-stat .sb-stat__num {
  font-size: 1.55rem;
  line-height: 1.1;
  color: var(--sb-c-white);
  word-break: keep-all;
}

.page-about__hero-stat .sb-stat__num--ember {
  color: var(--sb-c-ember);
}

.page-about__hero-stat .sb-stat__label {
  color: var(--about-muted);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
}

.page-about__hero-refresh {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--sb-c-line);
  font-family: var(--sb-font-data);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--about-muted);
}

/* ===== 品牌故事 ===== */
.page-about__story {
  position: relative;
  padding-top: 60px;
  padding-bottom: 72px;
  background: var(--sb-c-panel);
}

.page-about__story::before {
  content: '15';
  position: absolute;
  right: 20px;
  top: 30px;
  font-family: var(--sb-font-display);
  font-size: clamp(6rem, 18vw, 11rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--sb-c-line);
  opacity: 0.35;
  pointer-events: none;
}

.page-about__story-layout {
  position: relative;
  align-items: center;
  row-gap: 32px;
}

.page-about__story-text .sb-prose {
  max-width: 46em;
}

.page-about .sb-prose p {
  color: var(--about-gray);
  line-height: 1.8;
  margin: 0 0 18px;
  font-size: 0.9375rem;
}

.page-about .sb-prose p:first-of-type {
  color: var(--sb-c-white);
  font-size: 1.02rem;
  font-weight: 500;
}

.page-about__story-visual {
  position: relative;
}

.page-about .sb-frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about__story-caption {
  position: absolute;
  left: 14px;
  bottom: 12px;
  background: rgba(8, 8, 12, 0.72);
  padding: 5px 10px;
  font-family: var(--sb-font-data);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--about-neon);
  pointer-events: none;
}

/* ===== 发展里程碑 ===== */
.page-about__milestones {
  padding: 64px 0 72px;
  background: var(--sb-c-primary);
}

.page-about__timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding-top: 8px;
}

.page-about__timeline::before {
  content: '';
  position: absolute;
  left: 18px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(
    180deg,
    var(--about-neon) 0%,
    var(--sb-c-line) 28%,
    var(--about-gold) 52%,
    var(--sb-c-line) 76%,
    var(--about-gray) 100%
  );
}

.page-about__milestone {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding-left: 56px;
}

.page-about__milestone::before {
  content: '';
  position: absolute;
  left: 11px;
  top: 24px;
  width: 16px;
  height: 16px;
  border: 3px solid var(--about-neon);
  background: var(--sb-c-primary);
  transform: rotate(45deg);
  z-index: 1;
}

.page-about__milestone:nth-child(3n)::before {
  border-color: var(--about-gold);
}

.page-about__milestone:nth-child(4n)::before {
  border-color: var(--about-ember);
}

.page-about__milestone-stage {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 4px;
}

.page-about__milestone-index {
  font-family: var(--sb-font-data);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--about-neon);
}

.page-about__milestone:nth-child(3n) .page-about__milestone-index {
  color: var(--about-gold);
}

.page-about__milestone:nth-child(4n) .page-about__milestone-index {
  color: var(--about-ember);
}

.page-about__milestone-label {
  font-family: var(--sb-font-data);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--about-muted);
  text-transform: uppercase;
  white-space: nowrap;
}

.page-about__milestone-card {
  position: relative;
  background: rgba(18, 18, 26, 0.72);
  border: 1px solid var(--sb-c-line);
  border-left: 3px solid var(--about-neon);
  border-radius: 0 14px 14px 0;
  padding: 18px 20px;
}

.page-about__milestone:nth-child(3n) .page-about__milestone-card {
  border-left-color: var(--about-gold);
}

.page-about__milestone:nth-child(4n) .page-about__milestone-card {
  border-left-color: var(--about-ember);
}

.page-about__milestone-card::before {
  content: '';
  position: absolute;
  left: -3px;
  top: 16px;
  bottom: auto;
  width: 3px;
  height: 36px;
  background: inherit;
}

.page-about__milestone-card h3 {
  font-family: var(--sb-font-body);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--sb-c-white);
  margin: 0 0 8px;
}

.page-about__milestone-card p {
  margin: 0 0 12px;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--about-gray);
}

.page-about__milestone-tags {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* ===== 资质认证 ===== */
.page-about__certs {
  padding: 64px 0 72px;
  background: var(--sb-c-ink);
}

.page-about__certs-layout {
  row-gap: 32px;
}

.page-about__certs-visual {
  position: relative;
}

.page-about__certs-frame {
  position: relative;
  border-radius: calc(var(--sb-radius) + 2px);
  border: 1px solid var(--sb-c-line);
  background: var(--sb-c-panel);
}

.page-about__certs-frame img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  aspect-ratio: 4 / 5;
  border-radius: calc(var(--sb-radius) + 2px);
}

.page-about__certs-trophy-label {
  position: absolute;
  right: 10px;
  bottom: 10px;
  background: rgba(8, 8, 12, 0.78);
  padding: 4px 9px;
  font-family: var(--sb-font-data);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--about-gold);
  pointer-events: none;
}

.page-about__certs-cards {
  min-width: 0;
}

.page-about__certs-cards .sb-grid,
.page-about__certs-grid {
  row-gap: 16px;
  column-gap: 16px;
}

.page-about__cert-card {
  position: relative;
  padding: 22px 22px 18px;
  height: 100%;
  border: 1px solid var(--sb-c-line);
  border-radius: var(--sb-radius);
  overflow: hidden;
  transition: border-color var(--sb-transition), transform var(--sb-transition);
}

.page-about__cert-card::after {
  content: '';
  position: absolute;
  right: -22px;
  bottom: -22px;
  width: 66px;
  height: 66px;
  border: 2px solid var(--about-gold);
  transform: rotate(45deg);
  opacity: 0.06;
  pointer-events: none;
}

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

.page-about__cert-icon {
  display: block;
  margin-bottom: 18px;
}

.page-about__cert-icon svg {
  width: 46px;
  height: 46px;
  display: block;
  color: var(--about-gold);
  filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.18));
}

.page-about__cert-card h3 {
  font-family: var(--sb-font-body);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--sb-c-white);
  margin: 0 0 8px;
}

.page-about__cert-card p {
  margin: 0 0 14px;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--about-gray);
}

.page-about__cert-code {
  display: block;
  font-family: var(--sb-font-data);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--about-muted);
  border-top: 1px solid var(--sb-c-line);
  padding-top: 10px;
}

/* ===== 数据服务能力 ===== */
.page-about__capability {
  padding: 64px 0 72px;
  background: var(--sb-c-ink);
  position: relative;
  overflow: hidden;
}

.page-about__capability::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--sb-c-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--sb-c-line) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.22;
  pointer-events: none;
}

.page-about__cap-layout {
  position: relative;
  row-gap: 30px;
  align-items: stretch;
}

.page-about__cap-info {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about__cap-card {
  padding: 22px 24px;
  border: 1px solid var(--sb-c-line);
  border-radius: var(--sb-radius);
  background: rgba(10, 26, 47, 0.72);
  transition: border-color var(--sb-transition);
}

.page-about__cap-card:hover {
  border-color: rgba(0, 255, 136, 0.5);
}

.page-about__cap-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.page-about__cap-title-row h3 {
  font-family: var(--sb-font-body);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--sb-c-white);
  margin: 0;
}

.page-about__cap-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.page-about__cap-list li {
  position: relative;
  padding-left: 20px;
  color: var(--about-gray);
  font-size: 0.875rem;
  line-height: 1.55;
}

.page-about__cap-list li::before {
  content: '▹';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--about-neon);
}

.page-about__cap-visual {
  position: relative;
  min-height: 240px;
}

.page-about__cap-frame {
  position: relative;
  height: 100%;
  border-radius: calc(var(--sb-radius) + 2px);
  border: 1px solid var(--sb-c-line);
  background: var(--sb-c-panel);
  overflow: hidden;
}

.page-about__cap-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-about__cap-note {
  position: absolute;
  left: 12px;
  bottom: 12px;
  background: rgba(8, 8, 12, 0.78);
  padding: 5px 10px;
  font-family: var(--sb-font-data);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--about-gold);
  pointer-events: none;
}

/* ===== 合作伙伴 ===== */
.page-about__partners {
  padding: 64px 0 72px;
  background: var(--sb-c-panel);
}

.page-about__partner-grid {
  row-gap: 20px;
}

.page-about__partner-card {
  position: relative;
  padding: 24px 22px 20px;
  height: 100%;
  overflow: hidden;
  border: 1px solid var(--sb-c-line);
  border-radius: var(--sb-radius);
  transition: border-color var(--sb-transition), transform var(--sb-transition);
}

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

.page-about__partner-card::after {
  content: '';
  position: absolute;
  right: -22px;
  bottom: -22px;
  width: 72px;
  height: 72px;
  border: 2px solid var(--about-gold);
  transform: rotate(45deg);
  opacity: 0.06;
  pointer-events: none;
}

.page-about__partner-index {
  display: block;
  font-family: var(--sb-font-data);
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1;
  color: var(--sb-c-line);
  margin-bottom: 14px;
  transition: color var(--sb-transition);
}

.page-about__partner-card:hover .page-about__partner-index {
  color: var(--about-gold);
}

.page-about__partner-card h3 {
  font-family: var(--sb-font-body);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--sb-c-white);
  margin: 0 0 10px;
}

.page-about__partner-card p {
  margin: 0;
  color: var(--about-gray);
  font-size: 0.85rem;
  line-height: 1.65;
}

.page-about__partner-note {
  margin: 30px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--about-gold);
  background: rgba(10, 26, 47, 0.5);
  color: var(--about-muted);
  font-size: 0.8125rem;
  line-height: 1.65;
}

/* ===== CTA 收束 ===== */
.page-about__cta {
  padding: 56px 0 64px;
  background: var(--sb-c-primary);
}

.page-about__cta-frame {
  position: relative;
  padding: 36px 24px;
  border: 1px solid var(--sb-c-line);
  border-radius: calc(var(--sb-radius) + 4px);
  background: var(--sb-c-ink);
  overflow: hidden;
}

.page-about__cta-frame::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--about-neon), var(--about-gold), var(--about-ember));
}

.page-about__cta-content {
  position: relative;
  z-index: 1;
}

.page-about__cta-content .sb-overline {
  display: block;
  margin-bottom: 12px;
}

.page-about__cta-title {
  font-family: var(--sb-font-body);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--sb-c-white);
  margin: 0 0 10px;
}

.page-about__cta-content p {
  margin: 0 0 22px;
  color: var(--about-gray);
  font-size: 0.9375rem;
  max-width: 40em;
}

.page-about__cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== 响应式增强 ===== */
@media (min-width: 768px) {
  .page-about__hero {
    padding: 64px 0 88px;
  }
  .page-about__hero-layout {
    align-items: center;
  }
  .page-about__hero-frame {
    padding: 26px;
  }
  .page-about__story {
    padding-top: 80px;
    padding-bottom: 88px;
  }
  .page-about__milestones,
  .page-about__certs,
  .page-about__capability,
  .page-about__partners {
    padding-top: 80px;
    padding-bottom: 88px;
  }
  .page-about__timeline {
    gap: 24px;
  }
  .page-about__milestone {
    grid-template-columns: 200px 1fr;
    gap: 22px;
    padding-left: 72px;
  }
  .page-about__milestone::before {
    left: 12px;
  }
  .page-about__timeline::before {
    left: 20px;
  }
  .page-about__milestone-stage {
    padding-top: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
  .page-about__cert-card {
    padding: 24px 24px 20px;
  }
  .page-about__cta {
    padding: 64px 0;
  }
  .page-about__cta-frame {
    padding: 44px 36px;
  }
}

@media (min-width: 992px) {
  .page-about__hero {
    padding: 80px 0 100px;
  }
  .page-about__hero-title {
    font-size: clamp(2.8rem, 5vw, 4.2rem);
  }
  .page-about__hero-desc {
    font-size: 1.0625rem;
  }
  .page-about__story-layout {
    row-gap: 0;
  }
  .page-about__cap-layout {
    row-gap: 0;
  }
  .page-about__cap-card {
    padding: 26px 28px;
  }
  .page-about__milestone-card {
    padding: 22px 26px;
  }
  .page-about__certs-cards .sb-grid {
    row-gap: 20px;
  }
  .page-about__cta-title {
    font-size: 1.75rem;
  }
}

/* ===== 动效降级保护 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}