.page-about {
  --about-gold: #D4AF37;
  --about-gold-light: #F0D060;
  --about-red: #E63946;
  --about-blue: #00B4D8;
  --about-violet: #7B2CBF;
  --about-dark: #0A1F33;
  --about-dark-2: #132C4A;
  --about-bg: #F5F7FA;
  --about-text: #2D3748;
  --about-white: #FFFFFF;
  --about-radius: 4px;
  background: var(--about-bg);
}

.page-about .container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 20px;
  width: 100%;
}

.page-about .section {
  padding-block: 64px;
}

.page-about .section--dark {
  background: var(--about-dark);
  color: var(--about-white);
}

.page-about .section--light {
  background: var(--about-white);
}

.page-about .section-index {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.28em;
  color: var(--about-gold);
  text-transform: uppercase;
  border-left: 3px solid var(--about-red);
  padding-left: 10px;
  margin-bottom: 14px;
}

.page-about .section-index--light {
  color: var(--about-gold-light);
  border-left-color: var(--about-blue);
}

.page-about .section-title {
  font-family: var(--font-heading);
  font-size: 32px;
  line-height: 1.15;
  margin: 0 0 20px;
  letter-spacing: 0.02em;
}

.page-about .section-title--light {
  color: var(--about-white);
}

.page-about .section-lead {
  font-size: 16px;
  line-height: 1.7;
  color: var(--about-text);
  margin: 0 0 32px;
  max-width: 720px;
}

/* 面包屑 */
.page-about .breadcrumb {
  background: var(--about-dark);
  padding: 8px 20px 0;
  position: relative;
  z-index: 1;
}

.page-about .breadcrumb ol {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  max-width: var(--container);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
}

.page-about .breadcrumb a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  color: var(--about-gold-light);
  text-decoration: underline;
}

.page-about .breadcrumb__sep {
  color: var(--about-blue);
  margin-left: 8px;
}

.page-about .breadcrumb li[aria-current="page"] {
  color: var(--about-gold);
}

/* 首屏 */
.page-about .about-hero {
  background: var(--about-dark);
  position: relative;
  overflow: hidden;
  padding-block: 72px 80px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,180,216,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,180,216,0.08) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -60px;
  width: 280px;
  height: 280px;
  background: var(--about-violet);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  opacity: 0.35;
  pointer-events: none;
}

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

.page-about .about-hero__index {
  font-family: var(--font-heading);
  font-size: 13px;
  letter-spacing: 0.3em;
  color: var(--about-blue);
  margin: 0 0 16px;
}

.page-about .about-hero__title {
  font-family: var(--font-heading);
  font-size: 42px;
  line-height: 1.08;
  color: var(--about-white);
  margin: 0 0 24px;
  letter-spacing: 0.01em;
}

.page-about .about-hero__lead {
  font-size: 16px;
  line-height: 1.7;
  color: rgba(255,255,255,0.82);
  max-width: 680px;
  margin: 0 0 28px;
}

.page-about .about-hero__badge {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
}

.page-about .badge--gold {
  background: var(--about-gold);
  color: var(--about-dark);
  font-weight: 700;
}

.page-about .badge--blue {
  background: var(--about-blue);
  color: var(--about-dark);
  font-weight: 700;
}

/* 品牌缘起 */
.page-about .about-story {
  background: var(--about-bg);
}

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

.page-about .about-story__text {
  font-size: 16px;
  line-height: 1.75;
  color: var(--about-text);
  margin: 0 0 16px;
}

.page-about .about-story__facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 28px;
}

.page-about .stat-block {
  border-left: 4px solid var(--about-gold);
  padding: 14px 10px;
  background: var(--about-white);
  box-shadow: 0 2px 10px rgba(10, 31, 51, 0.06);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-about .stat-block::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  border-style: solid;
  border-width: 0 16px 16px 0;
  border-color: transparent var(--about-red) transparent transparent;
}

.page-about .stat-block__num {
  display: block;
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 900;
  color: var(--about-dark);
  line-height: 1.1;
}

.page-about .stat-block__label {
  display: block;
  font-size: 13px;
  color: var(--about-text);
  margin-top: 6px;
  line-height: 1.4;
}

/* 里程碑 */
.page-about .about-milestone {
  position: relative;
  overflow: hidden;
}

.page-about .about-milestone::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--about-blue), var(--about-gold), var(--about-red));
}

.page-about .about-milestone__head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}

.page-about .about-milestone__desc {
  color: rgba(255,255,255,0.75);
  font-size: 15px;
  line-height: 1.6;
  max-width: 480px;
  margin: 0;
}

.page-about .about-milestone__timeline {
  position: relative;
  padding-left: 26px;
}

.page-about .about-milestone__timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--about-blue), var(--about-gold), var(--about-violet));
}

.page-about .milestone-item {
  position: relative;
  margin-bottom: 28px;
}

.page-about .milestone-item__marker {
  position: absolute;
  left: -26px;
  top: 8px;
  width: 20px;
  height: 20px;
  background: var(--about-gold);
  transform: rotate(45deg);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--about-dark);
  box-shadow: 0 0 0 2px var(--about-gold);
}

.page-about .milestone-item__season {
  transform: rotate(-45deg);
  font-family: var(--font-heading);
  font-size: 10px;
  font-weight: 900;
  color: var(--about-dark);
  white-space: nowrap;
}

.page-about .milestone-item__panel {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.12);
  padding: 16px 18px;
  margin-left: 14px;
  backdrop-filter: blur(2px);
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.page-about .milestone-item:hover .milestone-item__panel,
.page-about .milestone-item__panel:focus-within {
  background: rgba(212, 175, 55, 0.08);
  border-color: var(--about-gold);
  transform: translateX(4px);
}

.page-about .milestone-item__title {
  font-family: var(--font-heading);
  font-size: 17px;
  margin: 0 0 8px;
  color: var(--about-white);
}

.page-about .milestone-item__text {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(255,255,255,0.72);
  margin: 0;
}

.page-about .milestone-chart {
  margin: 36px 0 0;
  position: relative;
}

.page-about .milestone-chart__img {
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  display: block;
  clip-path: polygon(2% 0, 100% 0, 98% 100%, 0 100%);
}

.page-about .milestone-chart__cap {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  padding: 12px 16px;
  background: var(--about-dark-2);
  margin-top: 8px;
}

/* 覆盖赛事 */
.page-about .about-leagues__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
}

.page-about .league-tag {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 700;
  color: var(--about-white);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: filter 0.2s ease, transform 0.2s ease;
  cursor: default;
}

.page-about .league-tag:hover,
.page-about .league-tag:focus-visible {
  filter: brightness(1.2);
  transform: translateY(-2px);
}

.page-about .league-tag--top {
  background: var(--about-gold);
  color: var(--about-dark);
}

.page-about .league-tag--mid {
  background: var(--about-blue);
  color: var(--about-dark);
}

.page-about .league-tag--low {
  background: var(--about-violet);
}

.page-about .league-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: var(--about-white);
  box-shadow: 0 4px 20px rgba(10, 31, 51, 0.08);
  display: block;
  overflow-x: auto;
}

.page-about .league-table__caption {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 900;
  text-align: left;
  padding: 14px 16px;
  background: var(--about-dark);
  color: var(--about-white);
}

.page-about .league-table th,
.page-about .league-table td {
  padding: 14px 14px;
  border-bottom: 1px solid rgba(10, 31, 51, 0.08);
  text-align: left;
  vertical-align: middle;
}

.page-about .league-table thead th {
  background: var(--about-dark-2);
  color: var(--about-gold-light);
  font-family: var(--font-heading);
  font-weight: 900;
  letter-spacing: 0.06em;
  border-bottom: 2px solid var(--about-gold);
}

.page-about .league-table tbody tr:hover {
  background: rgba(0, 180, 216, 0.06);
}

.page-about .league-figure {
  margin: 24px 0 0;
}

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

.page-about .league-figure__cap {
  font-size: 14px;
  color: var(--about-text);
  opacity: 0.75;
  padding-top: 8px;
  border-bottom: 1px solid var(--about-gold);
  padding-bottom: 8px;
  margin-top: 8px;
}

/* 技术保障 */
.page-about .about-tech__grid {
  display: grid;
  gap: 24px;
}

.page-about .about-tech__cards {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}

.page-about .about-tech-card {
  padding: 18px 20px;
}

.page-about .about-tech-card__title {
  font-family: var(--font-heading);
  font-size: 17px;
  margin: 0 0 8px;
  color: var(--about-dark);
  position: relative;
  padding-left: 12px;
}

.page-about .about-tech-card__title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  background: var(--about-gold);
}

.page-about .about-tech-card__text {
  font-size: 14px;
  line-height: 1.65;
  color: var(--about-text);
  margin: 0;
}

.page-about .about-tech__figure {
  margin: 0;
  order: -1;
}

.page-about .about-tech__img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
  border-left: 4px solid var(--about-blue);
}

.page-about .about-tech__cap {
  font-size: 14px;
  color: var(--about-text);
  opacity: 0.75;
  padding-top: 8px;
}

.page-about .about-tech__list {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-tech__list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--about-dark);
  background: var(--about-bg);
  padding: 12px 14px;
  border-left: 3px solid var(--about-blue);
}

/* 用户承诺 */
.page-about .about-promise {
  background:
    linear-gradient(rgba(255,255,255,0.4), rgba(255,255,255,0.4)),
    repeating-linear-gradient(0deg, transparent, transparent 24px, rgba(10, 31, 51, 0.05) 24px, rgba(10, 31, 51, 0.05) 25px);
}

.page-about .about-promise__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 36px 0;
}

.page-about .promise-card {
  background: var(--about-white);
  padding: 22px 20px;
  position: relative;
  border-top: 3px solid var(--about-gold);
  box-shadow: 0 6px 24px rgba(10, 31, 51, 0.08);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.page-about .promise-card:hover {
  box-shadow: 0 12px 32px rgba(10, 31, 51, 0.14);
  transform: translateY(-2px);
}

.page-about .promise-card__icon {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 900;
  color: var(--about-red);
  display: block;
  margin-bottom: 10px;
}

.page-about .promise-card__title {
  font-family: var(--font-heading);
  font-size: 18px;
  color: var(--about-dark);
  margin: 0 0 10px;
}

.page-about .promise-card__text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-text);
  margin: 0;
}

.page-about .about-promise__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.page-about .btn {
  display: inline-block;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 700;
  font-family: var(--font-heading);
  background: var(--about-gold);
  color: var(--about-dark);
  text-decoration: none;
  border: 2px solid var(--about-gold);
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.page-about .btn:hover,
.page-about .btn:focus-visible {
  background: var(--about-gold-light);
  border-color: var(--about-gold-light);
  transform: translateX(2px);
}

.page-about .btn--ghost {
  background: transparent;
  color: var(--about-gold);
  border-color: var(--about-gold);
}

.page-about .btn--ghost:hover,
.page-about .btn--ghost:focus-visible {
  background: var(--about-blue);
  border-color: var(--about-blue);
  color: var(--about-dark);
}

/* 通用卡片切角 */
.page-about .card-cut {
  background: var(--about-white);
  position: relative;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
  box-shadow: 0 4px 16px rgba(10, 31, 51, 0.08);
}

.page-about .card-cut::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 16px;
  height: 16px;
  background: linear-gradient(135deg, var(--about-gold), var(--about-red));
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}

/* 响应式 */
@media (max-width: 960px) {
  .page-about .about-tech__figure {
    order: 0;
  }
}

@media (min-width: 768px) {
  .page-about .section {
    padding-block: 80px;
  }

  .page-about .section-title {
    font-size: 36px;
  }

  .page-about .about-hero {
    padding-block: 96px 110px;
  }

  .page-about .about-hero__title {
    font-size: 54px;
  }

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

  .page-about .about-story__grid {
    grid-template-columns: 280px 1fr;
    gap: 56px;
    align-items: start;
  }

  .page-about .about-story__side .section-title {
    margin-bottom: 0;
  }

  .page-about .about-milestone__head {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
  }

  .page-about .about-milestone__desc {
    margin-bottom: 4px;
  }

  .page-about .about-milestone__timeline {
    padding-left: 32px;
  }

  .page-about .about-milestone__timeline::before {
    left: 10px;
  }

  .page-about .milestone-item__marker {
    left: -32px;
    width: 24px;
    height: 24px;
  }

  .page-about .milestone-item__panel {
    padding: 22px 26px;
    margin-left: 30px;
  }

  .page-about .milestone-item__title {
    font-size: 19px;
  }

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

  .page-about .league-table {
    display: table;
  }

  .page-about .league-table th,
  .page-about .league-table td {
    padding: 16px 18px;
  }

  .page-about .about-tech__grid {
    grid-template-columns: 1fr 420px;
    gap: 40px;
    align-items: stretch;
  }

  .page-about .about-tech__figure {
    margin: 0;
    align-self: start;
    position: sticky;
    top: 90px;
  }

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

  .page-about .about-tech__list {
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
  }

  .page-about .about-promise__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .page-about .promise-card {
    padding: 26px 24px;
  }
}

@media (max-width: 380px) {
  .page-about .about-hero__title {
    font-size: 34px;
  }

  .page-about .stat-block__num {
    font-size: 24px;
  }

  .page-about .stat-block__label {
    font-size: 12px;
  }
}