.page-about {
  --about-text-body: #425466;
  --about-line-soft: rgba(0, 180, 216, 0.35);
  overflow-x: hidden;
}

.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 14px;
}

.page-about .about-kicker::before {
  content: "";
  width: 34px;
  height: 3px;
  background: var(--color-accent);
  border-radius: 3px;
  flex: none;
}

.page-about .about-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 48px;
}

.page-about .about-breadcrumb a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.page-about .about-breadcrumb a:hover,
.page-about .about-breadcrumb a:focus-visible {
  color: var(--color-tertiary);
}

.page-about .about-breadcrumb-sep {
  opacity: 0.5;
}

.page-about .about-breadcrumb [aria-current="page"] {
  color: var(--color-white);
  font-weight: 600;
}

.page-about .about-hero {
  position: relative;
  background: var(--color-primary);
  color: var(--color-white);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.04) 0, rgba(255, 255, 255, 0.04) 1px, transparent 1px, transparent 48px),
    radial-gradient(circle at 20% 30%, rgba(0, 180, 216, 0.14), transparent 44%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  top: -8%;
  width: 55%;
  height: 120%;
  background: linear-gradient(135deg, rgba(255, 107, 0, 0.2) 0%, rgba(0, 180, 216, 0) 60%);
  clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero-lines {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 70%;
  pointer-events: none;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
  padding-top: 56px;
  padding-bottom: 72px;
}

.page-about .about-hero-grid {
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about .about-hero-copy {
  position: relative;
  z-index: 2;
}

.page-about .about-hero-copy h1 {
  font-family: var(--font-headline);
  font-size: clamp(46px, 8vw, 92px);
  font-weight: 700;
  line-height: 1.04;
  margin: 0 0 20px;
}

.page-about .about-hero-title-line {
  display: block;
  color: var(--color-tertiary);
  font-size: 0.7em;
  margin-top: 4px;
}

.page-about .about-hero-lead {
  margin: 0;
  max-width: 640px;
  color: var(--color-text-secondary);
  font-size: 16px;
  line-height: 1.7;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.page-about .about-hero-panel {
  position: relative;
  z-index: 2;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(176, 196, 222, 0.2);
  border-radius: 14px;
  padding: 26px 24px;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.18);
}

.page-about .about-hero-panel-head {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

.page-about .about-hero-panel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 4px rgba(0, 200, 83, 0.14);
}

.page-about .about-hero-panel-status {
  margin-left: auto;
  padding: 3px 10px;
  border-radius: 12px;
  background: rgba(0, 200, 83, 0.15);
  color: var(--color-success);
  font-weight: 600;
  font-size: 11px;
}

.page-about .about-hero-profile {
  margin: 0;
}

.page-about .about-hero-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(176, 196, 222, 0.15);
}

.page-about .about-hero-row:last-child {
  border-bottom: none;
}

.page-about .about-hero-row dt {
  color: var(--color-text-secondary);
  font-size: 13px;
  flex: none;
}

.page-about .about-hero-row dd {
  margin: 0;
  font-family: var(--font-headline);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-accent-light);
  text-align: right;
}

.page-about .about-idea {
  position: relative;
  background: var(--color-light-bg);
  padding: 92px 0;
  overflow: hidden;
}

.page-about .about-idea::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 46%;
  height: 100%;
  background: linear-gradient(115deg, transparent 40%, rgba(0, 180, 216, 0.12) 41%, rgba(255, 107, 0, 0.08) 70%);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-idea::after {
  content: "必一竞技";
  position: absolute;
  bottom: 28px;
  left: 52%;
  transform: rotate(-8deg);
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: clamp(56px, 7vw, 120px);
  color: rgba(10, 25, 47, 0.07);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-idea-inner {
  position: relative;
  z-index: 1;
}

.page-about .about-idea-grid {
  display: grid;
  gap: 36px;
  align-items: center;
}

.page-about .about-idea-copy h2,
.page-about .about-milestone h2,
.page-about .about-team h2,
.page-about .about-impact h2,
.page-about .about-honors h2,
.page-about .about-next h2 {
  font-family: var(--font-headline);
  font-size: clamp(30px, 4vw, 52px);
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 16px;
  color: var(--color-primary);
}

.page-about .about-idea-em {
  font-style: normal;
  color: var(--color-accent);
}

.page-about .about-idea-lead {
  max-width: 640px;
  margin: 0;
  color: var(--about-text-body);
  line-height: 1.7;
}

.page-about .about-idea-items {
  display: grid;
  gap: 20px;
  margin-top: 40px;
}

.page-about .about-idea-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 24px;
  background: var(--color-white);
  border-left: 4px solid var(--color-accent);
  border-radius: 8px;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-fast), box-shadow var(--transition-normal);
}

.page-about .about-idea-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-strong);
}

.page-about .about-idea-num {
  font-family: var(--font-headline);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-accent);
  flex: none;
  padding-top: 2px;
}

.page-about .about-idea-item-copy h3 {
  font-family: var(--font-headline);
  font-size: 20px;
  font-weight: 600;
  color: var(--color-primary);
  margin: 0 0 6px;
}

.page-about .about-idea-item-copy p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--about-text-body);
}

.page-about .about-idea-media,
.page-about .about-team-media,
.page-about .about-honors-media {
  margin: 0;
}

.page-about .about-idea-img,
.page-about .about-team-media img,
.page-about .about-honors-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 16px;
}

.page-about .about-idea-img {
  box-shadow: 12px 12px 0 rgba(10, 25, 47, 0.12);
}

.page-about .about-idea-caption,
.page-about .about-team-media figcaption,
.page-about .about-honors-media figcaption {
  margin-top: 12px;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.page-about .about-milestone {
  position: relative;
  padding: 96px 0 120px;
  background:
    linear-gradient(rgba(10, 25, 47, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 25, 47, 0.025) 1px, transparent 1px),
    var(--color-light-bg);
  background-size: 32px 32px;
  overflow: hidden;
}

.page-about .about-milestone-lead {
  max-width: 640px;
  margin: 0;
  font-size: 18px;
  color: var(--color-text-secondary);
}

.page-about .about-timeline {
  position: relative;
  margin-top: 64px;
  padding-left: 24px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 0;
  bottom: 0;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(to bottom, var(--color-accent), var(--color-secondary));
  opacity: 0.35;
}

.page-about .about-timeline-item {
  position: relative;
  padding: 28px 24px;
  margin-bottom: 28px;
  background: var(--color-white);
  border-radius: 14px;
  box-shadow: var(--shadow-card);
}

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 32px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-white);
  box-shadow: 0 0 0 4px rgba(255, 107, 0, 0.18);
}

.page-about .about-timeline-year {
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 52px;
  line-height: 1;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.page-about .about-timeline-track {
  display: none;
}

.page-about .about-timeline-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-accent);
  background: rgba(255, 107, 0, 0.12);
  padding: 4px 10px;
  border-radius: 20px;
}

.page-about .about-timeline-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.page-about .about-timeline-content h3 {
  font-family: var(--font-headline);
  font-size: 24px;
  font-weight: 600;
  color: var(--color-primary);
  margin: 10px 0 8px;
}

.page-about .about-timeline-content p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-text-body);
}

.page-about .about-team {
  position: relative;
  background:
    linear-gradient(120deg, var(--color-primary) 0%, #0d2a4e 60%, rgba(0, 180, 216, 0.12) 100%),
    var(--color-primary);
  color: var(--color-white);
  padding: 96px 0;
  overflow: hidden;
}

.page-about .about-team::after {
  content: "";
  position: absolute;
  left: -10%;
  bottom: -30%;
  width: 60%;
  height: 70%;
  background: radial-gradient(circle, rgba(0, 180, 216, 0.16), transparent 68%);
  pointer-events: none;
}

.page-about .about-team-inner {
  position: relative;
  z-index: 1;
}

.page-about .about-team-grid {
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about .about-team h2,
.page-about .about-impact h2 {
  color: var(--color-white);
}

.page-about .about-team-lead {
  color: var(--color-text-secondary);
  margin: 0;
  max-width: 560px;
  line-height: 1.7;
}

.page-about .about-team-steps {
  list-style: none;
  margin: 32px 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-team-steps li {
  padding: 18px;
  border: 1px solid rgba(176, 196, 222, 0.25);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
}

.page-about .about-team-steps strong {
  display: block;
  font-family: var(--font-headline);
  font-size: 16px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 4px;
}

.page-about .about-team-steps span {
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-text-secondary);
}

.page-about .about-team-media img {
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.2);
}

.page-about .about-team-media figcaption {
  color: var(--color-text-secondary);
}

.page-about .about-team-stats {
  display: grid;
  gap: 18px;
  margin-top: 56px;
}

.page-about .about-team-stat {
  padding: 24px;
  border-left: 4px solid var(--color-accent);
  background: rgba(255, 255, 255, 0.06);
  border-radius: 8px;
}

.page-about .about-team-stat-num {
  display: block;
  font-family: var(--font-headline);
  font-size: clamp(28px, 3vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--color-accent);
}

.page-about .about-team-stat-label {
  display: block;
  margin-top: 8px;
  color: var(--color-text-secondary);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.page-about .about-impact {
  position: relative;
  background: var(--color-primary-deep);
  color: var(--color-white);
  padding: 100px 0;
}

.page-about .about-impact::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-secondary), var(--color-tertiary));
}

.page-about .about-impact-lead {
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0;
}

.page-about .about-impact-grid {
  display: grid;
  gap: 20px;
  margin-top: 48px;
}

.page-about .about-impact-stat {
  position: relative;
  padding: 32px 28px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(176, 196, 222, 0.15);
  border-radius: 12px;
}

.page-about .about-impact-stat:hover {
  border-color: rgba(0, 229, 255, 0.4);
}

.page-about .about-impact-num {
  display: block;
  font-family: var(--font-headline);
  font-size: clamp(52px, 5vw, 72px);
  font-weight: 700;
  line-height: 1;
  color: var(--color-accent);
}

.page-about .about-impact-label {
  display: inline-block;
  margin-top: 12px;
  color: var(--color-secondary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.page-about .about-impact-stat p {
  margin: 12px 0 0;
  color: var(--color-text-secondary);
  font-size: 14px;
  line-height: 1.6;
}

.page-about .about-honors {
  background: var(--color-light-bg);
  padding: 96px 0;
}

.page-about .about-honors-inner {
  display: grid;
  gap: 48px;
  align-items: center;
}

.page-about .about-honors-lead {
  max-width: 560px;
  margin: 0;
  color: var(--about-text-body);
  line-height: 1.7;
}

.page-about .about-honors-list {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-honors-item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: 22px 24px;
  background: var(--color-white);
  border-radius: 12px;
  box-shadow: 0 6px 24px rgba(10, 25, 47, 0.08);
  transition: transform var(--transition-fast), box-shadow var(--transition-normal);
}

.page-about .about-honors-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.page-about .about-honors-mark {
  width: 46px;
  height: 46px;
  flex: 0 0 46px;
  display: grid;
  place-items: center;
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-accent), var(--color-secondary));
  border-radius: 50%;
  font-size: 20px;
}

.page-about .about-honors-item h3 {
  font-family: var(--font-headline);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary);
  margin: 0 0 6px;
}

.page-about .about-honors-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: #5a6d82;
}

.page-about .about-honors-media img {
  box-shadow: var(--shadow-card);
}

.page-about .about-next {
  position: relative;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 80px 0;
  text-align: center;
  overflow: hidden;
}

.page-about .about-next::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(0, 180, 216, 0.2), transparent 60%);
  pointer-events: none;
}

.page-about .about-next-inner {
  position: relative;
  z-index: 1;
}

.page-about .about-next h2 {
  color: var(--color-white);
  text-align: center;
}

.page-about .about-next-lead {
  max-width: 480px;
  margin: 0 auto;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.page-about .about-next-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  margin-top: 28px;
}

@media (min-width: 768px) {
  .page-about .about-hero-inner {
    padding-top: 72px;
    padding-bottom: 96px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
    gap: 60px;
  }

  .page-about .about-idea-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    gap: 64px;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 60px;
  }

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

  .page-about .about-honors-inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 64px;
  }
}

@media (min-width: 820px) {
  .page-about .about-timeline {
    padding-left: 0;
  }

  .page-about .about-timeline::before {
    display: none;
  }

  .page-about .about-timeline-item {
    display: grid;
    grid-template-columns: 180px 60px minmax(0, 1fr);
    column-gap: 20px;
    align-items: start;
    background: transparent;
    box-shadow: none;
    border-radius: 0;
    padding: 12px 0 80px;
    margin-bottom: 0;
  }

  .page-about .about-timeline-item::before {
    display: none;
  }

  .page-about .about-timeline-item:last-child {
    padding-bottom: 16px;
  }

  .page-about .about-timeline-year {
    font-size: clamp(72px, 7vw, 108px);
    color: var(--color-accent);
    text-align: right;
    line-height: 0.8;
    margin-top: 4px;
    transform: rotate(-4deg);
    margin-bottom: 0;
  }

  .page-about .about-timeline-track {
    display: block;
    position: relative;
  }

  .page-about .about-timeline-track::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    transform: translateX(-50%);
    border-radius: 3px;
    background: var(--about-line-soft);
  }

  .page-about .about-timeline-track::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 18px;
    width: 15px;
    height: 15px;
    transform: translateX(-50%);
    border-radius: 50%;
    background: var(--color-accent);
    border: 3px solid var(--color-white);
    box-shadow: 0 0 0 5px rgba(255, 107, 0, 0.2);
  }

  .page-about .about-timeline-content {
    position: relative;
    background: var(--color-white);
    border-radius: 16px;
    padding: 26px 30px;
    box-shadow: var(--shadow-card);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  }

  .page-about .about-timeline-content:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-strong);
  }
}

@media (min-width: 1024px) {
  .page-about .about-impact-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }
}

@supports (animation-timeline: view()) {
  .page-about .about-timeline-item {
    animation: about-rise both;
    animation-timeline: view();
    animation-range: entry 4% entry 40%;
  }

  .page-about .about-impact-stat {
    animation: about-rise both;
    animation-timeline: view();
    animation-range: entry 4% entry 46%;
  }
}

@keyframes about-rise {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline-item,
  .page-about .about-impact-stat {
    animation: none;
  }

  .page-about .about-idea-item:hover,
  .page-about .about-honors-item:hover,
  .page-about .about-timeline-content:hover {
    transform: none;
  }
}