.page-about {
  --about-accent: #FF6A00;
  --about-alt: #39FF14;
  --about-bg-card: #141E3A;
  --about-border: rgba(143, 167, 204, 0.28);
  position: relative;
  background: var(--bg);
  color: var(--ink);
  overflow-x: hidden;
}

/* ==== 通用章节头部 ==== */
.page-about .about-section-head {
  max-width: 720px;
  position: relative;
  z-index: 1;
}
.page-about .about-section-head h2 {
  font-family: var(--font-title);
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.2;
  margin: 14px 0 12px;
}
.page-about .about-section-sub {
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  margin: 0;
}

/* ==== 01 品牌简介 ==== */
.page-about .about-intro {
  position: relative;
  padding: 56px 0 72px;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 82% 8%, rgba(255, 106, 0, 0.14), transparent 55%),
    var(--bg);
}
.page-about .about-intro::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 60%;
  height: 100%;
  background: linear-gradient(135deg, transparent 0%, rgba(57, 255, 20, 0.02) 100%);
  pointer-events: none;
}
.page-about .about-speed-lines {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(-45deg, transparent 0, transparent 14px, rgba(143, 167, 204, 0.05) 14px, rgba(143, 167, 204, 0.05) 15px);
  pointer-events: none;
}
.page-about .about-intro-layout {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 40px;
  align-items: center;
}
.page-about .about-intro-content {
  position: relative;
}
.page-about .about-intro-content h1 {
  font-family: var(--font-title);
  font-size: clamp(38px, 5vw, 60px);
  font-weight: 700;
  line-height: 1.08;
  margin: 18px 0 22px;
  letter-spacing: 0.5px;
}
.page-about .about-intro-lead {
  font-size: 17px;
  line-height: 1.75;
  color: var(--slate);
  margin-bottom: 14px;
}
.page-about .about-intro-body {
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  margin-bottom: 32px;
}
.page-about .about-intro-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.page-about .about-stat-item {
  background: var(--bg-card);
  border-left: 3px solid var(--accent);
  padding: 12px 18px;
  min-width: 116px;
  border-radius: 0 4px 4px 0;
}
.page-about .about-stat-item:nth-child(2) {
  border-left-color: var(--alt);
}
.page-about .about-stat-item strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.1;
}
.page-about .about-stat-item span {
  display: block;
  font-size: 12px;
  color: var(--slate);
  margin-top: 5px;
}
.page-about .about-intro-visual {
  margin: 0;
  position: relative;
}
.page-about .about-intro-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  transform: translate(10px, 10px);
  background: var(--bg-card);
  clip-path: polygon(4% 0, 100% 0, 96% 100%, 0 100%);
  border-radius: 4px;
  z-index: -1;
}
.page-about .about-intro-visual img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  clip-path: polygon(4% 0, 100% 0, 96% 100%, 0 100%);
  border-radius: 4px;
}
.page-about .about-intro-cap {
  margin-top: 14px;
  font-size: 12px;
  color: var(--muted);
  text-align: right;
  padding-right: 4px;
}

/* ==== 02 发展历程 ==== */
.page-about .about-journey {
  position: relative;
  padding: 72px 0 80px;
  background: var(--bg-deep);
}
.page-about .about-journey::before {
  content: "02";
  position: absolute;
  right: 28px;
  top: 28px;
  font-family: var(--font-mono);
  font-size: 90px;
  font-weight: 700;
  line-height: 1;
  color: rgba(255, 106, 0, 0.06);
  pointer-events: none;
  z-index: 0;
}
.page-about .about-journey::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--accent) 0%, rgba(255, 106, 0, 0.2) 30%, transparent 70%);
}
.page-about .about-timeline {
  position: relative;
  margin-top: 48px;
  z-index: 1;
}
.page-about .about-timeline-item {
  display: grid;
  grid-template-columns: 64px 20px 1fr;
  gap: 4px 8px;
  padding-bottom: 36px;
  position: relative;
}
.page-about .about-timeline-item:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline-year {
  font-family: var(--font-mono);
  text-align: right;
  padding-top: 4px;
}
.page-about .about-timeline-year span {
  display: block;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--accent);
}
.page-about .about-timeline-year em {
  display: block;
  font-style: normal;
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--slate);
  margin-top: 4px;
}
.page-about .about-timeline-rail {
  position: relative;
}
.page-about .about-timeline-rail::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 50%;
  width: 12px;
  height: 12px;
  background: var(--bg-deep);
  border: 3px solid var(--accent);
  border-radius: 50%;
  transform: translateX(-50%);
  box-shadow: 0 0 0 4px rgba(255, 106, 0, 0.12);
}
.page-about .about-timeline-item:not(:last-child) .about-timeline-rail::after {
  content: "";
  position: absolute;
  top: 26px;
  bottom: -40px;
  left: 50%;
  width: 2px;
  background: linear-gradient(180deg, rgba(255, 106, 0, 0.55), rgba(57, 255, 20, 0.4));
  transform: translateX(-50%);
}
.page-about .about-timeline-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 20px 20px 16px;
}
.page-about .about-timeline-card .tag {
  position: absolute;
  top: -8px;
  right: 10px;
}
.page-about .about-timeline-card h3 {
  font-family: var(--font-title);
  font-size: 17px;
  font-weight: 600;
  margin: 10px 0 8px;
  color: var(--ink);
}
.page-about .about-timeline-card p {
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
  margin: 0;
}
.page-about .about-timeline-meta {
  display: block;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--border);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
}

/* ==== 03 数据体系 ==== */
.page-about .about-data-system {
  position: relative;
  padding: 72px 0 80px;
  background:
    linear-gradient(100deg, transparent 72%, rgba(255, 106, 0, 0.04) 72%, rgba(255, 106, 0, 0.06) 84%, transparent 84%),
    var(--bg);
}
.page-about .about-data-system::before {
  content: "03";
  position: absolute;
  right: 28px;
  top: 28px;
  font-family: var(--font-mono);
  font-size: 90px;
  font-weight: 700;
  line-height: 1;
  color: rgba(57, 255, 20, 0.05);
  pointer-events: none;
  z-index: 0;
}
.page-about .about-data-system::after {
  content: "";
  position: absolute;
  right: 0;
  top: 12%;
  width: 80px;
  height: 76%;
  background: repeating-linear-gradient(-45deg, transparent 0, transparent 7px, rgba(143, 167, 204, 0.05) 7px, rgba(143, 167, 204, 0.05) 8px);
  pointer-events: none;
}
.page-about .about-data-layout {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 32px;
  margin-bottom: 56px;
}
.page-about .about-data-copy h2 {
  font-family: var(--font-title);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.18;
  margin: 16px 0 16px;
}
.page-about .about-data-lead {
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate);
  margin-bottom: 28px;
}
.page-about .about-data-list {
  display: grid;
  gap: 0;
}
.page-about .about-data-item {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 12px;
  padding: 15px 0;
  border-bottom: 1px solid var(--border);
}
.page-about .about-data-item:first-child {
  border-top: 1px solid var(--border);
}
.page-about .about-data-item dt {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 1px;
}
.page-about .about-data-item dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}
.page-about .about-data-visual {
  margin: 0;
}
.page-about .about-data-visual img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--border);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.3);
}
.page-about .about-data-visual figcaption {
  margin-top: 10px;
  font-size: 12px;
  color: var(--muted);
  text-align: center;
}
.page-about .about-data-history {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
}
.page-about .about-data-history img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: 6px;
}
.page-about .about-data-history-copy h3 {
  font-family: var(--font-title);
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 12px;
}
.page-about .about-data-history-copy p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
  margin-bottom: 12px;
}
.page-about .about-data-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

/* ==== 04 覆盖赛事 ==== */
.page-about .about-leagues {
  position: relative;
  padding: 72px 0 80px;
  background: linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-card) 100%);
}
.page-about .about-leagues::before {
  content: "04";
  position: absolute;
  right: 28px;
  top: 28px;
  font-family: var(--font-mono);
  font-size: 90px;
  font-weight: 700;
  line-height: 1;
  color: rgba(255, 106, 0, 0.05);
  pointer-events: none;
  z-index: 0;
}
.page-about .about-league-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 40px;
  position: relative;
  z-index: 1;
}
.page-about .about-league-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 20px;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}
.page-about .about-league-item:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}
.page-about .about-league-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--accent), var(--accent-dark));
}
.page-about .about-league-item:nth-child(even)::before {
  background: linear-gradient(180deg, var(--alt), var(--alt-dark));
}
.page-about .about-league-item.about-league-ucl::before {
  background: linear-gradient(180deg, var(--accent), var(--alt));
}
.page-about .about-league-code {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 2px;
  color: var(--accent);
  display: inline-block;
  margin-bottom: 10px;
  background: rgba(255, 106, 0, 0.08);
  padding: 2px 8px;
  border-radius: 2px;
}
.page-about .about-league-item:nth-child(even) .about-league-code {
  color: var(--alt);
  background: rgba(57, 255, 20, 0.07);
}
.page-about .about-league-item h3 {
  font-family: var(--font-title);
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 4px;
}
.page-about .about-league-item p {
  font-size: 13px;
  color: var(--muted);
  margin: 0;
}
.page-about .about-league-note {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 32px;
  padding: 16px 20px;
  background: rgba(255, 106, 0, 0.06);
  border-left: 3px solid var(--accent);
  border-radius: 0 4px 4px 0;
  position: relative;
  z-index: 1;
}
.page-about .about-league-note p {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--slate);
}

/* ==== 05 用户与口碑 ==== */
.page-about .about-users {
  position: relative;
  padding: 72px 0 80px;
  background: var(--bg-deep);
}
.page-about .about-users::before {
  content: "05";
  position: absolute;
  right: 28px;
  top: 28px;
  font-family: var(--font-mono);
  font-size: 90px;
  font-weight: 700;
  line-height: 1;
  color: rgba(57, 255, 20, 0.05);
  pointer-events: none;
  z-index: 0;
}
.page-about .about-users-layout {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 48px;
}
.page-about .about-users-summary h2 {
  font-family: var(--font-title);
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  line-height: 1.2;
  margin: 16px 0 16px;
}
.page-about .about-users-summary > p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate);
  margin-bottom: 24px;
}
.page-about .about-users-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.page-about .about-users-stat {
  background: var(--bg-card);
  border-radius: 4px;
  padding: 16px;
  text-align: center;
  border-top: 2px solid var(--accent);
}
.page-about .about-users-stat:nth-child(2) {
  border-top-color: var(--alt);
}
.page-about .about-users-stat strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.1;
}
.page-about .about-users-stat:nth-child(2) strong {
  color: var(--alt);
}
.page-about .about-users-stat span {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-top: 6px;
}
.page-about .about-users-quotes {
  display: grid;
  gap: 20px;
}
.page-about .about-quote {
  position: relative;
  margin: 0;
  background: rgba(20, 30, 58, 0.55);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 24px 24px 18px;
}
.page-about .about-quote::before {
  content: "“";
  position: absolute;
  top: 2px;
  left: 16px;
  font-family: var(--font-title);
  font-size: 42px;
  line-height: 1;
  color: var(--accent);
}
.page-about .about-quote p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink);
  margin: 10px 0 12px;
}
.page-about .about-quote footer {
  font-size: 12px;
  color: var(--muted);
  border-top: 1px solid var(--border);
  padding-top: 10px;
}

/* ==== 响应式增强 ==== */
@media (min-width: 640px) {
  .page-about .about-intro {
    padding: 64px 0 80px;
  }
  .page-about .about-users-stats {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .about-league-grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .about-timeline-item {
    grid-template-columns: 80px 28px 1fr;
    gap: 8px 12px;
  }
  .page-about .about-timeline-year span {
    font-size: 24px;
  }
}

@media (min-width: 992px) {
  .page-about .about-intro {
    padding: 72px 0 96px;
  }
  .page-about .about-intro-layout {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 64px;
  }
  .page-about .about-intro-visual {
    transform: translateY(8px);
  }
  .page-about .about-journey {
    padding: 88px 0 96px;
  }
  .page-about .about-timeline {
    margin-top: 64px;
  }
  .page-about .about-timeline-item {
    grid-template-columns: 160px 48px 1fr;
    gap: 0 24px;
    align-items: start;
    padding-bottom: 56px;
  }
  .page-about .about-timeline-year span {
    font-size: 36px;
  }
  .page-about .about-timeline-year em {
    font-size: 12px;
  }
  .page-about .about-timeline-card {
    padding: 26px 28px 20px;
    max-width: 680px;
  }
  .page-about .about-timeline-card h3 {
    font-size: 20px;
  }
  .page-about .about-timeline-card p {
    font-size: 14px;
  }
  .page-about .about-data-system {
    padding: 88px 0 96px;
  }
  .page-about .about-data-layout {
    grid-template-columns: 1fr 0.85fr;
    gap: 64px;
    align-items: center;
    margin-bottom: 64px;
  }
  .page-about .about-data-copy {
    position: relative;
    padding-left: 20px;
  }
  .page-about .about-data-copy::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--accent), var(--alt));
    opacity: 0.55;
    border-radius: 2px;
  }
  .page-about .about-data-history {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 48px;
    align-items: center;
    padding: 32px;
  }
  .page-about .about-leagues {
    padding: 88px 0 96px;
  }
  .page-about .about-league-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 56px;
  }
  .page-about .about-league-item {
    padding: 24px;
  }
  .page-about .about-users {
    padding: 88px 0 96px;
  }
  .page-about .about-users-layout {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 64px;
    align-items: start;
  }
  .page-about .about-users-quotes {
    gap: 24px;
  }
  .page-about .about-quote {
    padding: 28px 28px 22px;
  }
}