/* ========== AK体育品牌故事页 · 页面专属样式 ========== */
.page-about {
  --about-line: rgba(11, 61, 46, 0.16);
  --about-gold-soft: rgba(201, 162, 39, 0.35);
  background: var(--cream);
  color: var(--ink);
}

/* —— 页面头部定制 —— */
.page-about .page-head {
  position: relative;
  overflow: hidden;
  padding: 36px 0 56px;
  background: var(--primary);
  color: #fff;
}
.page-about .page-head::before {
  content: "";
  position: absolute;
  right: -100px;
  top: -100px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201, 162, 39, 0.45), transparent 68%);
  pointer-events: none;
}
.page-about .page-head::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 5px;
  background: repeating-linear-gradient(115deg, var(--accent) 0 16px, transparent 16px 32px, var(--alert) 32px 44px, transparent 44px 60px);
  opacity: 0.85;
}
.page-about .page-head .breadcrumb {
  margin: 0 0 26px;
}
.page-about .page-head .breadcrumb a {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  transition: color 0.2s ease;
}
.page-about .page-head .breadcrumb a:hover {
  color: var(--accent-light);
}
.page-about .page-head .breadcrumb span {
  margin: 0 8px;
  color: rgba(255, 255, 255, 0.45);
}
.page-about .page-head .breadcrumb [aria-current="page"] {
  color: var(--accent-light);
}
.page-about .page-head__kicker {
  display: inline-block;
  margin: 0 0 14px;
  padding-left: 10px;
  border-left: 3px solid var(--alert);
  font-family: var(--font-title);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-light);
}
.page-about .page-head__title {
  margin: 0 0 16px;
  font-family: var(--font-title);
  font-size: clamp(30px, 5vw, 56px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: 0.02em;
  color: #fff;
}
.page-about .page-head__title span {
  display: block;
  margin-top: 12px;
  font-size: clamp(14px, 2vw, 20px);
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--accent-light);
}
.page-about .page-head__desc {
  max-width: 660px;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
}

/* —— 章节标题通用补充 —— */
.page-about .section__head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 12px;
  margin-bottom: 8px;
}
.page-about .section__title {
  margin: 0;
  font-family: var(--font-title);
  font-size: clamp(24px, 3.4vw, 36px);
  font-weight: 900;
  line-height: 1.2;
  color: var(--primary);
}
.page-about .section__note {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(11, 61, 46, 0.5);
  white-space: nowrap;
}
.page-about .page-kicker {
  display: inline-block;
  margin: 0 0 8px;
  font-family: var(--font-title);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

/* —— 分区一：版本演进 —— */
.page-about .page-version {
  padding: 64px 0 56px;
  background: var(--soft);
}

.page-about .timeline {
  display: grid;
  gap: 14px;
  margin-top: 36px;
}
.page-about .timeline__item {
  position: relative;
  padding: 16px 16px 0;
  background: var(--soft);
  border: 1px solid rgba(11, 61, 46, 0.08);
  border-left: 4px solid var(--accent);
  border-radius: 0 10px 10px 0;
  transition: border-color 0.25s ease, background 0.25s ease;
}
.page-about .timeline__item:hover {
  background: var(--cream);
  border-left-color: var(--alert);
}
.page-about .timeline__axis {
  display: none;
}
.page-about .timeline__card {
  padding: 0 0 4px;
}
.page-about .timeline__card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}
.page-about .timeline__title {
  margin: 0 0 4px;
  font-family: var(--font-title);
  font-size: 19px;
  font-weight: 800;
  color: var(--primary);
}
.page-about .timeline__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(11, 61, 46, 0.55);
}
.page-about .timeline__summary {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}
.page-about .timeline__toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 10px;
  border: 1px solid rgba(201, 162, 39, 0.55);
  border-radius: var(--radius);
  background: transparent;
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--primary);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}
.page-about .timeline__toggle:hover {
  background: var(--accent);
  color: #fff;
}
.page-about .timeline__toggle-icon {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform 0.2s ease;
}
.page-about .timeline__item[data-open="true"] .timeline__toggle-icon {
  transform: rotate(225deg);
}
.page-about .timeline__panel {
  display: none;
  margin-top: 10px;
}
.page-about .timeline__panel p {
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed rgba(11, 61, 46, 0.16);
  font-size: 14px;
  line-height: 1.75;
  color: rgba(11, 61, 46, 0.85);
}
.page-about .timeline__item[data-open="true"] .timeline__panel {
  display: block;
  animation: aboutTimelineFade 0.25s ease;
}

@keyframes aboutTimelineFade {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: none; }
}

.page-about .page-version__figure {
  max-width: 720px;
  margin: 44px 0 0;
}
.page-about .page-version__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}
.page-about .page-version__figure figcaption {
  margin-top: 10px;
  padding-left: 12px;
  border-left: 3px solid var(--accent);
  font-size: 13px;
  color: rgba(11, 61, 46, 0.65);
}

/* —— 分区二：始于中国站 —— */
.page-about .page-origin {
  padding: 64px 0;
  background: var(--cream);
}
.page-about .page-origin__inner {
  display: grid;
  gap: 24px;
}
.page-about .page-origin__text > p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(26, 26, 26, 0.88);
}
.page-about .page-origin .feature-list {
  margin: 20px 0 0;
}
.page-about .page-origin__aside {
  align-self: start;
}
.page-about .page-origin__aside .notice-bar {
  margin: 0;
}

/* —— 分区三：数据版图 —— */
.page-about .page-data {
  position: relative;
  overflow: hidden;
  padding: 72px 0;
  background: linear-gradient(180deg, var(--primary-deep) 0%, var(--primary) 100%);
  color: var(--soft);
}
.page-about .page-data::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: repeating-linear-gradient(115deg, var(--accent) 0 14px, transparent 14px 28px, var(--alert) 28px 40px, transparent 40px 54px);
  opacity: 0.9;
}
.page-about .page-data .section__title {
  color: var(--soft);
}
.page-about .page-data .section__note {
  color: rgba(232, 240, 234, 0.55);
}
.page-about .page-kicker--gold {
  color: var(--accent-light);
}
.page-about .page-data__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 28px;
}
.page-about .page-data .data-stat {
  min-height: 108px;
  padding: 18px 14px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  background: var(--glass);
}
.page-about .page-data .data-stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--accent-light);
}
.page-about .page-data .data-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.4;
  color: rgba(232, 240, 234, 0.8);
}
.page-about .page-data__lower {
  display: grid;
  gap: 22px;
  margin-top: 22px;
}
.page-about .page-data__figure {
  margin: 0;
  order: 2;
}
.page-about .page-data__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
.page-about .page-data__figure figcaption {
  margin-top: 10px;
  padding-left: 12px;
  border-left: 3px solid var(--accent);
  font-size: 13px;
  color: rgba(232, 240, 234, 0.7);
}
.page-about .page-data__extra {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  order: 1;
}
.page-about .page-data__extra-item {
  padding: 16px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.06);
}
.page-about .page-data__extra-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--accent-light);
}
.page-about .page-data__extra-label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.5;
  color: rgba(232, 240, 234, 0.8);
}

/* —— 分区四：服务理念 —— */
.page-about .page-philosophy {
  padding: 64px 0;
  background: var(--cream);
}
.page-about .page-philosophy__grid {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}
.page-about .page-philosophy__card {
  padding: 22px 18px;
  background: var(--soft);
  border-top: 4px solid var(--accent);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.page-about .page-philosophy__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.page-about .page-philosophy__card h3 {
  margin: 14px 0 8px;
  font-family: var(--font-title);
  font-size: 20px;
  color: var(--primary);
}
.page-about .page-philosophy__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(26, 26, 26, 0.85);
}
.page-about .page-philosophy__figure {
  max-width: 480px;
  margin: 36px auto 0;
}
.page-about .page-philosophy__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}
.page-about .page-philosophy__figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  text-align: center;
  color: rgba(11, 61, 46, 0.6);
}

/* —— 分区五：继续了解 —— */
.page-about .page-next {
  padding: 60px 0 72px;
  background: var(--black);
}
.page-about .page-next__title {
  margin: 0 0 24px;
  font-family: var(--font-title);
  font-size: 26px;
  font-weight: 800;
  text-align: center;
  color: var(--soft);
}
.page-about .page-next__grid {
  display: grid;
  gap: 12px;
}
.page-about .page-next__link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 16px;
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.07);
  text-decoration: none;
  color: var(--soft);
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}
.page-about .page-next__link:hover {
  transform: translateY(-3px);
  background: rgba(255, 255, 255, 0.12);
  border-left-color: var(--alert);
}
.page-about .page-next__link-no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
}
.page-about .page-next__link strong {
  font-family: var(--font-title);
  font-size: 18px;
  color: var(--accent-light);
}
.page-about .page-next__link-desc {
  font-size: 13px;
  line-height: 1.5;
  color: rgba(232, 240, 234, 0.65);
}

/* —— 窄屏细节 —— */
@media (max-width: 639px) {
  .page-about .section__note {
    display: none;
  }
}

/* —— 平板及以上 —— */
@media (min-width: 768px) {
  .page-about .page-origin__inner {
    grid-template-columns: 1.5fr 0.5fr;
    align-items: start;
  }
  .page-about .page-data__stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
  }
  .page-about .page-data__extra {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .page-philosophy__grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .page-next__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* —— 桌面时间轴与双栏布局 —— */
@media (min-width: 960px) {
  .page-about .timeline {
    position: relative;
    gap: 0;
  }
  .page-about .timeline::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    transform: translateX(-1px);
    background: linear-gradient(180deg, var(--accent) 0%, rgba(201, 162, 39, 0.08) 100%);
  }
  .page-about .timeline__item {
    width: 50%;
    margin: 0;
    padding: 0 48px 24px 0;
    background: transparent;
    border: none;
    border-radius: 0;
  }
  .page-about .timeline__item:hover {
    background: transparent;
  }
  .page-about .timeline__item:nth-child(even) {
    margin-left: auto;
    padding: 0 0 24px 48px;
  }
  .page-about .timeline__axis {
    display: block;
    position: absolute;
    top: 2px;
    right: -14px;
    z-index: 1;
    width: 28px;
    text-align: center;
  }
  .page-about .timeline__item:nth-child(even) .timeline__axis {
    right: auto;
    left: -14px;
  }
  .page-about .timeline__year {
    display: block;
    margin-bottom: 6px;
    font-family: var(--font-mono);
    font-size: 11px;
    line-height: 1.2;
    color: rgba(11, 61, 46, 0.7);
    white-space: nowrap;
  }
  .page-about .timeline__dot {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 4px rgba(201, 162, 39, 0.22);
  }
  .page-about .timeline__card {
    padding: 18px 18px 4px;
    background: var(--cream);
    border: 1px solid rgba(11, 61, 46, 0.08);
    border-left: 4px solid var(--accent);
    border-radius: 0 10px 10px 0;
    transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
  }
  .page-about .timeline__item:nth-child(even) .timeline__card {
    border-left: none;
    border-right: 4px solid var(--accent);
    border-radius: 10px 0 0 10px;
  }
  .page-about .timeline__item:hover .timeline__card {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    background: var(--soft);
  }
  .page-about .page-version__figure {
    margin-right: 0;
    margin-left: auto;
  }
  .page-about .page-data__lower {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
  }
  .page-about .page-data__figure {
    order: 1;
  }
  .page-about .page-data__extra {
    grid-template-columns: 1fr;
    order: 2;
  }
  .page-about .page-next__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}