.page-about {
  --about-gold-soft: rgba(212, 175, 55, 0.35);
  --about-gold-faint: rgba(212, 175, 55, 0.12);
  background:
    radial-gradient(ellipse at 82% 8%, rgba(10, 61, 46, 0.35), transparent 52%),
    radial-gradient(ellipse at 12% 62%, rgba(212, 175, 55, 0.06), transparent 34%),
    var(--black);
  color: var(--text-light);
  overflow-x: hidden;
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 24px 0 0;
  position: relative;
  border-bottom: 1px solid var(--about-gold-faint);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 58%;
  height: 6px;
  background: var(--gradient-gold-green);
}

.page-about .about-hero-grid {
  display: grid;
  gap: 28px;
  align-items: center;
}

.page-about .about-hero-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}

.page-about .about-hero-brandline {
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0;
}

.page-about .about-hero-copy h1 {
  font-family: var(--font-display);
  font-size: clamp(42px, 8vw, 72px);
  line-height: 1;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--text-light);
}

.page-about .about-hero-lead {
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.75;
  color: var(--text-muted);
  max-width: 34em;
  margin: 0;
}

.page-about .about-hero-photo {
  position: relative;
  clip-path: polygon(0 0, 100% 0, 100% 88%, 6% 100%, 0 94%);
  background: var(--forest);
  border: 1px solid var(--about-gold-soft);
}

.page-about .about-hero-photo img {
  width: 100%;
  display: block;
  object-fit: cover;
}

.page-about .about-hero-photo::after {
  content: "EST. 2020";
  position: absolute;
  right: 14px;
  bottom: 34px;
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: rgba(245, 245, 245, 0.92);
  background: rgba(0, 0, 0, 0.55);
  padding: 6px 12px;
  border-left: 3px solid var(--gold);
}

/* ---------- 章节预览目录 ---------- */
.page-about .about-toc {
  margin-top: 40px;
  border-top: 1px solid var(--about-gold-soft);
  border-bottom: 1px solid var(--about-gold-soft);
  padding: 24px 0 28px;
}

.page-about .about-toc-label {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 16px;
}

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

.page-about .about-toc-item a {
  display: grid;
  grid-template-columns: 48px 1fr;
  grid-template-rows: auto auto;
  column-gap: 14px;
  align-items: center;
  padding: 16px 16px;
  background: var(--forest);
  border: 1px solid transparent;
  border-left: 3px solid var(--gold);
  text-decoration: none;
  color: var(--text-light);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.page-about .about-toc-item a:hover,
.page-about .about-toc-item a:focus-visible {
  transform: translateY(-4px);
  border-color: var(--about-gold-soft);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
  outline: none;
}

.page-about .about-toc-index {
  grid-row: 1 / span 2;
  font-family: var(--font-display);
  font-size: 30px;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-toc-title {
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: 0.04em;
}

.page-about .about-toc-desc {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--text-muted);
}

/* ---------- 通用区块 ---------- */
.page-about .about-section {
  padding: 64px 0;
}

.page-about .about-section-header {
  margin-bottom: 36px;
}

.page-about .about-section-chapter {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 8px;
}

.page-about .about-section-header .section-heading {
  margin: 0 0 12px;
}

.page-about .about-section-intro {
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.7;
  color: var(--text-muted);
  max-width: 42em;
  margin: 0;
}

/* ---------- 第一章：品牌起源 ---------- */
.page-about .about-origin {
  background: linear-gradient(180deg, rgba(10, 61, 46, 0.3), rgba(0, 0, 0, 0) 62%);
  border-bottom: 1px solid var(--about-gold-faint);
}

.page-about .about-origin-layout {
  display: grid;
  gap: 32px;
}

.page-about .about-origin-main {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-light);
  max-width: 68ch;
}

.page-about .about-origin-main p {
  margin: 0 0 18px;
}

.page-about .about-origin-main p:last-child {
  margin-bottom: 0;
}

.page-about .about-origin-aside {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-fact-card {
  background: var(--forest);
  border: 1px solid var(--about-gold-faint);
  border-left: 4px solid var(--gold);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-fact-label {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.page-about .about-fact-number {
  font-family: var(--font-display);
  font-size: 34px;
  line-height: 1.1;
  color: var(--gold);
}

.page-about .about-fact-unit {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--text-muted);
}

/* ---------- 第二章：赛事数据版图 ---------- */
.page-about .about-map {
  background: var(--black);
  border-bottom: 1px solid var(--about-gold-faint);
}

.page-about .about-map-visual {
  margin: 0 0 36px;
  border: 1px solid var(--about-gold-soft);
  background: var(--forest);
}

.page-about .about-map-image {
  width: 100%;
  display: block;
  object-fit: cover;
}

.page-about .about-map-caption {
  padding: 10px 16px;
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  border-top: 1px solid var(--about-gold-faint);
}

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

.page-about .about-map-stat {
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-stat-title {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.page-about .about-map-stat .stat-value {
  font-family: var(--font-display);
  font-size: 42px;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-stat-foot {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--text-muted);
}

/* ---------- 第三章：赛季里程碑 ---------- */
.page-about .about-milestones {
  background: linear-gradient(180deg, rgba(15, 42, 32, 0.42), rgba(0, 0, 0, 0) 40%);
  border-bottom: 1px solid var(--about-gold-faint);
}

.page-about .about-milestone-layout {
  display: grid;
  gap: 36px;
}

.page-about .about-timeline-wrap {
  min-width: 0;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 24px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 2px;
  bottom: 2px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold), rgba(212, 175, 55, 0.08));
}

.page-about .about-timeline-item {
  position: relative;
  padding-bottom: 24px;
}

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

.page-about .about-timeline-node {
  position: absolute;
  left: -24px;
  top: 8px;
  width: 14px;
  height: 14px;
  background: var(--gold);
  transform: rotate(45deg);
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.15);
}

.page-about .about-timeline-card {
  background: var(--forest);
  padding: 18px 20px;
  border: 1px solid var(--about-gold-faint);
  border-left: 3px solid var(--gold);
}

.page-about .about-timeline-card h3 {
  font-family: var(--font-display);
  font-size: 18px;
  margin: 0 0 8px;
  color: var(--text-light);
}

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

.page-about .about-milestone-side {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .about-milestone-img {
  width: 100%;
  display: block;
  border: 1px solid var(--about-gold-faint);
  object-fit: cover;
}

/* ---------- 第四章：资质与合作 ---------- */
.page-about .about-qualification {
  background: var(--black);
}

.page-about .about-qual-layout {
  display: grid;
  gap: 36px;
}

.page-about .about-license-band {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  padding: 20px 24px;
  background: linear-gradient(135deg, var(--gold) 0%, var(--dark-green) 100%);
  margin-bottom: 32px;
  border-left: 6px solid rgba(0, 0, 0, 0.35);
}

.page-about .about-license-tag {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: rgba(0, 0, 0, 0.78);
  background: rgba(255, 255, 255, 0.3);
  padding: 4px 10px;
}

.page-about .about-license-value {
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--text-light);
  letter-spacing: 0.04em;
}

.page-about .about-qual-textblock {
  margin-bottom: 28px;
}

.page-about .about-qual-textblock h3 {
  font-family: var(--font-display);
  font-size: 20px;
  margin: 0 0 10px;
  color: var(--gold);
  padding-left: 14px;
  border-left: 4px solid var(--gold);
}

.page-about .about-qual-textblock p {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-light);
  margin: 0;
  max-width: 70ch;
}

.page-about .about-continue-card {
  background: var(--forest);
  border: 1px solid var(--about-gold-soft);
  padding: 26px 24px;
  position: relative;
}

.page-about .about-continue-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-gold-green);
}

.page-about .about-continue-card h3 {
  font-family: var(--font-display);
  font-size: 18px;
  margin: 0 0 18px;
  color: var(--text-light);
  letter-spacing: 0.08em;
}

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

.page-about .about-continue-list a {
  display: block;
  padding: 12px 14px;
  text-decoration: none;
  color: var(--text-light);
  font-family: var(--font-body);
  font-size: 16px;
  background: rgba(10, 61, 46, 0.5);
  border-left: 3px solid transparent;
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.page-about .about-continue-list a:hover,
.page-about .about-continue-list a:focus-visible {
  border-left-color: var(--gold);
  transform: translateX(4px);
  outline: none;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding-top: 40px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: 1.08fr 0.92fr;
    gap: 48px;
  }

  .page-about .about-hero-copy h1 {
    font-size: 64px;
  }

  .page-about .about-toc-list {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }

  .page-about .about-toc-item a {
    min-height: 148px;
    padding: 20px 18px;
  }

  .page-about .about-toc-index {
    font-size: 34px;
  }

  .page-about .about-toc-desc {
    font-size: 14px;
  }

  .page-about .about-origin-layout {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
  }

  .page-about .about-origin-main {
    font-size: 18px;
  }

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

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

  .page-about .about-qual-layout {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
  }

  .page-about .about-continue-card {
    padding: 30px 28px;
  }
}

/* ---------- 桌面端：水平时间轴 ---------- */
@media (min-width: 1024px) {
  .page-about .about-milestone-layout {
    grid-template-columns: 1.45fr 0.55fr;
    gap: 44px;
  }

  .page-about .about-timeline {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    padding-left: 0;
  }

  .page-about .about-timeline::before {
    left: 0;
    right: 0;
    width: auto;
    top: 7px;
    bottom: auto;
    height: 2px;
    background: linear-gradient(90deg, var(--gold) 0%, var(--dark-green) 52%, var(--gold) 100%);
  }

  .page-about .about-timeline-item {
    padding: 0;
  }

  .page-about .about-timeline-item::after {
    content: "";
    position: absolute;
    top: 16px;
    left: 6px;
    width: 2px;
    height: 18px;
    background: var(--gold);
    opacity: 0.45;
  }

  .page-about .about-timeline-node {
    left: 0;
    top: 0;
  }

  .page-about .about-timeline-card {
    margin-top: 34px;
    min-height: 178px;
  }

  .page-about .about-milestone-side {
    grid-template-columns: 1fr;
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc-item a,
  .page-about .about-continue-list a {
    transition: none;
  }
}