/* ===== 品牌档案页面专属样式 ===== */

.page-about {
  background: var(--cream);
  color: var(--ink);
  position: relative;
}

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

.page-about a {
  color: var(--deep-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color .25s var(--ease);
}

.page-about a:hover {
  color: var(--amber);
}

/* —— 面包屑 —— */

.page-about .about-breadcrumbs {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 1.1rem var(--gutter) 0;
  font-family: var(--font-body);
  font-size: .875rem;
  color: var(--slate);
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  align-items: center;
}

.page-about .about-breadcrumbs a {
  color: var(--slate);
  text-decoration: none;
}

.page-about .about-breadcrumbs a:hover {
  color: var(--amber);
}

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

/* —— 章节公共标题 —— */

.page-about .about-section-head {
  margin-bottom: 2rem;
}

.page-about .about-eyebrow {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: .875rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--deep-blue);
  margin-bottom: .8rem;
}

.page-about .about-section-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  background: var(--amber);
  color: #FFFFFF;
  font-size: .875rem;
  font-weight: 700;
  letter-spacing: 0;
  flex-shrink: 0;
}

.page-about .about-section-head h2 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  line-height: 1.15;
  color: var(--ink);
  margin: 0 0 .75rem;
}

.page-about .about-section-desc {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--slate);
  max-width: 640px;
  margin: 0;
}

.page-about .about-section-head--light .about-eyebrow {
  color: var(--electric-green);
}

.page-about .about-section-head--light h2 {
  color: var(--cream);
}

.page-about .about-section-head--light .about-section-desc {
  color: rgba(245, 241, 232, .78);
}

/* —— 首屏 Hero —— */

.page-about .about-hero {
  margin: 2rem var(--gutter) 0;
  padding: 2.6rem var(--gutter) 3rem;
  border-radius: 24px;
  background:
    radial-gradient(900px 380px at 88% -6%, rgba(57, 255, 20, .14), transparent 55%),
    linear-gradient(120deg, var(--deep-blue) 10%, var(--deep-blue-soft) 72%);
  color: var(--cream);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  right: -12%;
  top: -28%;
  width: 58%;
  height: 150%;
  transform: rotate(14deg);
  background: linear-gradient(90deg, transparent, rgba(57, 255, 20, .07) 42%, rgba(255, 107, 0, .12) 100%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--electric-green), rgba(57, 255, 20, .1) 70%, transparent);
}

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

.page-about .about-hero__kicker {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: .9rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: rgba(245, 241, 232, .8);
  margin-bottom: 1.2rem;
}

.page-about .about-hero__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  background: var(--amber);
  color: #FFFFFF;
  font-size: .875rem;
  letter-spacing: 0;
}

.page-about .about-hero h1 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(2.1rem, 5vw, 3.6rem);
  line-height: 1.08;
  margin: 0 0 1.1rem;
  max-width: 14em;
}

.page-about .about-hero__lead {
  font-family: var(--font-body);
  font-size: 1.025rem;
  line-height: 1.8;
  color: rgba(245, 241, 232, .85);
  max-width: 620px;
  margin: 0 0 2.2rem;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: .8rem;
}

.page-about .about-hero__stat {
  border: 1px solid rgba(245, 241, 232, .16);
  background: rgba(255, 255, 255, .06);
  border-radius: 12px;
  padding: 1rem .75rem;
  text-align: center;
}

.page-about .about-hero__stat-num {
  display: block;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 1.8rem;
  line-height: 1.1;
  color: var(--electric-green);
}

.page-about .about-hero__stat:nth-child(2) .about-hero__stat-num {
  color: var(--amber);
}

.page-about .about-hero__stat-label {
  display: block;
  font-family: var(--font-body);
  font-size: .8125rem;
  color: rgba(245, 241, 232, .72);
  margin-top: .35rem;
}

/* —— 品牌旅程 —— */

.page-about .about-journey {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: clamp(3.2rem, 7vw, 5.5rem) var(--gutter);
}

.page-about .about-journey__media {
  margin: 0 0 2.5rem;
}

.page-about .about-journey__media img {
  border-radius: 18px;
  object-fit: cover;
  width: 100%;
}

.page-about .about-journey__media figcaption {
  margin-top: .6rem;
  font-family: var(--font-body);
  font-size: .8125rem;
  color: var(--slate);
}

/* —— 时间线 —— */

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

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--amber) 0%, var(--line) 78%, transparent 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 2.6rem;
  padding-bottom: 2.4rem;
}

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

.page-about .about-timeline__marker {
  position: absolute;
  left: 0;
  top: .55rem;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--amber);
  border: 3px solid var(--cream);
  box-shadow: 0 0 0 2px var(--amber);
}

.page-about .about-timeline__card {
  background: var(--mist);
  border-radius: 14px;
  border-left: 4px solid var(--amber);
  padding: 1.25rem 1.25rem 1.5rem;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .about-timeline__card:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow);
}

.page-about .about-timeline__year {
  display: block;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 2.4rem;
  line-height: 1;
  color: var(--deep-blue);
  letter-spacing: .02em;
}

.page-about .about-timeline__card h3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.25rem;
  line-height: 1.3;
  color: var(--ink);
  margin: .55rem 0 .45rem;
}

.page-about .about-timeline__card p {
  font-family: var(--font-body);
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--slate);
  margin: 0;
}

/* —— CN地域乐竞体育升级版说明 —— */

.page-about .about-upgrade {
  background: var(--deep-blue);
  color: var(--cream);
  padding: clamp(3.2rem, 7vw, 5.5rem) var(--gutter);
}

.page-about .about-upgrade__inner {
  max-width: var(--max-w);
  margin-inline: auto;
}

.page-about .about-upgrade__grid {
  display: grid;
  gap: 2.4rem;
  align-items: start;
}

.page-about .about-upgrade__content {
  display: block;
}

.page-about .about-upgrade__feature {
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(245, 241, 232, .14);
  border-radius: 14px;
  padding: 1.4rem 1.5rem 1.6rem;
  margin-bottom: 1rem;
  position: relative;
}

.page-about .about-upgrade__feature-num {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--amber);
  display: block;
  margin-bottom: .35rem;
  letter-spacing: .08em;
}

.page-about .about-upgrade__feature h3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--cream);
  margin: 0 0 .5rem;
}

.page-about .about-upgrade__feature p {
  font-family: var(--font-body);
  font-size: .9375rem;
  line-height: 1.75;
  color: rgba(245, 241, 232, .75);
  margin: 0;
}

.page-about .about-upgrade__more {
  font-family: var(--font-body);
  font-size: .9375rem;
  line-height: 1.75;
  color: rgba(245, 241, 232, .72);
  margin: 1.5rem 0 0;
}

.page-about .about-upgrade__more a {
  color: var(--electric-green);
}

.page-about .about-upgrade__media {
  margin: 0;
  position: relative;
}

.page-about .about-upgrade__media::before {
  content: "";
  position: absolute;
  inset: -10px 10px 10px -10px;
  border: 2px solid rgba(57, 255, 20, .55);
  border-radius: 20px 20px 20px 4px;
  pointer-events: none;
}

.page-about .about-upgrade__media img {
  width: 100%;
  border-radius: 18px;
  object-fit: cover;
}

.page-about .about-upgrade__media figcaption {
  margin-top: .7rem;
  font-family: var(--font-body);
  font-size: .8125rem;
  color: rgba(245, 241, 232, .6);
}

/* —— 数据运营体系 —— */

.page-about .about-data-system {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: clamp(3.2rem, 7vw, 5.5rem) var(--gutter);
}

.page-about .about-data-system__content {
  display: grid;
  gap: 2.4rem;
  align-items: start;
}

.page-about .about-data-flow {
  background: var(--mist);
  border-radius: 18px;
  padding: 1.2rem;
}

.page-about .about-data-flow__svg {
  width: 100%;
  height: auto;
  display: block;
}

.page-about .about-data-methods {
  counter-reset: method;
}

.page-about .about-data-method {
  counter-increment: method;
  border-bottom: 1px solid var(--line);
  border-radius: 10px;
  transition: background .25s var(--ease);
}

.page-about .about-data-method[open] {
  background: rgba(255, 107, 0, .05);
}

.page-about .about-data-method summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: .65rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--deep-blue);
  padding: 1rem .75rem;
  line-height: 1.4;
}

.page-about .about-data-method summary::-webkit-details-marker {
  display: none;
}

.page-about .about-data-method summary:hover {
  color: var(--amber);
}

.page-about .about-data-method summary::before {
  content: counter(method, decimal-leading-zero);
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 1rem;
  color: var(--amber);
  flex-shrink: 0;
}

.page-about .about-data-method summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--amber);
}

.page-about .about-data-method[open] summary::after {
  content: "−";
}

.page-about .about-data-method p {
  font-family: var(--font-body);
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--slate);
  margin: 0 0 1.25rem;
  padding: 0 .75rem 0 2.3rem;
}

.page-about .about-data-method p a {
  color: var(--deep-blue);
  font-weight: 600;
}

.page-about .about-data-method p a:hover {
  color: var(--amber);
}

/* —— 团队与组织 —— */

.page-about .about-team {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 0 var(--gutter) clamp(3.2rem, 7vw, 5.5rem);
}

.page-about .about-team__grid {
  display: grid;
  gap: 2.4rem;
  align-items: center;
}

.page-about .about-team__media {
  margin: 0;
}

.page-about .about-team__media img {
  width: 100%;
  border-radius: 24px 24px 24px 4px;
  object-fit: cover;
}

.page-about .about-team__media figcaption {
  margin-top: .65rem;
  font-family: var(--font-body);
  font-size: .8125rem;
  color: var(--slate);
}

.page-about .about-team__roles {
  display: grid;
  gap: 1rem;
}

.page-about .about-team__role {
  display: flex;
  gap: 1.2rem;
  align-items: flex-start;
  background: var(--mist);
  border-radius: 16px;
  padding: 1.4rem 1.3rem;
}

.page-about .about-team__role-count {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 2.4rem;
  line-height: 1;
  color: var(--amber);
  display: flex;
  align-items: baseline;
  gap: .2rem;
  flex-shrink: 0;
}

.page-about .about-team__role-count span {
  font-size: 1rem;
  color: var(--slate);
}

.page-about .about-team__role-body h3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--ink);
  margin: 0 0 .4rem;
}

.page-about .about-team__role-body p {
  font-family: var(--font-body);
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--slate);
  margin: 0;
}

/* —— 资质与荣誉 —— */

.page-about .about-credentials {
  background: var(--deep-blue);
  color: var(--cream);
  padding: clamp(3.2rem, 7vw, 5.5rem) var(--gutter);
}

.page-about .about-credentials__inner {
  max-width: var(--max-w);
  margin-inline: auto;
}

.page-about .about-credentials__grid {
  display: grid;
  gap: 1.2rem;
}

.page-about .about-credential-card {
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(245, 241, 232, .13);
  border-radius: 16px;
  padding: 1.6rem 1.5rem;
  position: relative;
  transition: transform .3s var(--ease), border-color .3s var(--ease);
}

.page-about .about-credential-card:hover {
  transform: translateY(-3px);
  border-color: rgba(57, 255, 20, .5);
}

.page-about .about-credential-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--amber);
  color: var(--deep-blue);
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 1rem;
}

.page-about .about-credential-card h3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--cream);
  margin: 0 0 .45rem;
}

.page-about .about-credential-card p {
  font-family: var(--font-body);
  font-size: .9375rem;
  line-height: 1.7;
  color: rgba(245, 241, 232, .72);
  margin: 0;
}

/* —— 数据能力一览 —— */

.page-about .about-capabilities {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: clamp(3rem, 7vw, 5rem) var(--gutter);
}

.page-about .about-capabilities__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: .9rem;
}

.page-about .about-capability {
  background: var(--deep-blue);
  border-radius: 18px;
  padding: 1.5rem 1rem;
  text-align: center;
  border-bottom: 4px solid var(--electric-green);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}

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

.page-about .about-capability__num {
  display: block;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  line-height: 1.1;
  color: var(--electric-green);
}

.page-about .about-capability:nth-child(2) .about-capability__num {
  color: var(--amber);
}

.page-about .about-capability__label {
  display: block;
  font-family: var(--font-body);
  font-size: .8125rem;
  color: rgba(245, 241, 232, .78);
  margin-top: .4rem;
}

.page-about .about-capabilities__note {
  font-family: var(--font-body);
  font-size: .9375rem;
  color: var(--slate);
  line-height: 1.75;
  margin: 1.8rem 0 0;
}

.page-about .about-capabilities__note a {
  font-weight: 600;
}

/* —— 动效 —— */

@media (prefers-reduced-motion: no-preference) {
  .page-about .about-timeline__item {
    animation: about-rise .55s var(--ease) both;
  }

  .page-about .about-timeline__item:nth-child(2) {
    animation-delay: .1s;
  }

  .page-about .about-timeline__item:nth-child(3) {
    animation-delay: .2s;
  }

  .page-about .about-timeline__item:nth-child(4) {
    animation-delay: .3s;
  }

  .page-about .about-timeline__item:nth-child(5) {
    animation-delay: .4s;
  }
}

@keyframes about-rise {
  from {
    opacity: 0;
    transform: translateY(1rem);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* —— 桌面端 —— */

@media (min-width: 768px) {
  .page-about .about-hero {
    margin-inline: auto;
    max-width: var(--max-w);
    padding: 3.2rem 3rem 3.4rem;
  }

  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, 1fr);
    max-width: 780px;
  }

  .page-about .about-timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .about-timeline__item {
    width: 50%;
    padding-left: 0;
    padding-right: 2.8rem;
  }

  .page-about .about-timeline__item:nth-child(even) {
    margin-left: 50%;
    padding-left: 2.8rem;
    padding-right: 0;
  }

  .page-about .about-timeline__marker {
    left: auto;
    right: -10px;
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__marker {
    right: auto;
    left: -10px;
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__card {
    border-left: none;
    border-right: 4px solid var(--amber);
  }

  .page-about .about-timeline__card:hover {
    transform: translateY(-4px);
  }

  .page-about .about-upgrade__grid {
    grid-template-columns: 7fr 4fr;
    gap: 3rem;
  }

  .page-about .about-data-system__content {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }

  .page-about .about-team__grid {
    grid-template-columns: 5fr 4fr;
    gap: 3rem;
  }

  .page-about .about-credentials__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }

  .page-about .about-capabilities__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.2rem;
  }
}