/* ========== 天行体育品牌概况 · 页面专属样式 ========== */
.page-about {
  --about-accent: var(--color-accent);
  --about-cyan: var(--color-cyan);
  --about-cyan-ink: var(--color-cyan-ink);
  --about-primary: var(--color-primary);
  --about-deep: var(--color-primary-deep);
  --about-silver: var(--color-silver);
  --about-light: var(--color-light);
  --about-white: var(--color-white);
  --about-ink: var(--color-ink);
  --about-ink-soft: var(--color-ink-soft);
  --about-stat-bg: rgba(255, 255, 255, 0.06);
  --about-stat-border: rgba(255, 255, 255, 0.14);
  background: var(--about-light);
  color: var(--about-ink);
  overflow-x: hidden;
}

/* 面包屑当前页 */
.page-about .breadcrumb__current {
  color: var(--about-accent);
  font-weight: 600;
}

/* 杂志式区块序号 */
.page-about .about-section-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--about-accent);
  margin-bottom: var(--space-2);
}

/* 键盘焦点反馈 */
.page-about a:focus-visible,
.page-about .about-contact__card:focus-visible {
  outline: 3px solid var(--about-accent);
  outline-offset: 2px;
}

/* ========== 首屏 ========== */
.page-about .about-hero {
  position: relative;
  padding: var(--space-6) 0 var(--space-7);
  background:
    linear-gradient(rgba(11, 29, 58, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 29, 58, 0.05) 1px, transparent 1px),
    var(--about-light);
  background-size: 40px 40px;
  overflow: hidden;
}
.page-about .about-hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 56%;
  height: 130%;
  transform: skewX(-8deg);
  background: linear-gradient(135deg, transparent 30%, rgba(255, 107, 53, 0.14) 72%, rgba(0, 212, 255, 0.08) 100%);
  pointer-events: none;
}
.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-areas:
    "main"
    "rail"
    "visual";
  gap: var(--space-5) 0;
}

.page-about .about-hero__rail {
  grid-area: rail;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
}
.page-about .about-hero__rail-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--about-cyan-ink);
}
.page-about .about-tag {
  display: inline-block;
  padding: 7px 14px;
  font-size: 13px;
  font-weight: 500;
  line-height: 1;
  text-decoration: none;
  color: var(--about-primary);
  border: 1px solid var(--about-cyan);
  background: transparent;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}
.page-about .about-tag:hover,
.page-about .about-tag:focus-visible {
  background-color: var(--about-cyan);
  border-color: var(--about-cyan);
  color: var(--about-white);
}

.page-about .about-hero__main {
  grid-area: main;
}
.page-about .about-hero__main .kicker {
  color: var(--about-accent);
}
.page-about .about-hero__main .display-title {
  margin-top: 0;
  margin-bottom: var(--space-4);
  color: var(--about-primary);
}
.page-about .about-hero__main .display-title__accent {
  color: var(--about-accent);
  display: block;
}
.page-about .about-hero__lead {
  max-width: 560px;
  margin: 0 0 var(--space-5);
  font-size: 16px;
  line-height: 1.8;
  color: var(--about-ink);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.page-about .about-hero__visual {
  grid-area: visual;
  position: relative;
  margin: 0;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), 0 100%);
}
.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
}
.page-about .about-hero__visual::after {
  content: '';
  position: absolute;
  right: 8px;
  bottom: 8px;
  width: 64px;
  height: 64px;
  background: var(--about-accent);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  opacity: 0.85;
  pointer-events: none;
}

/* ========== 品牌定位 ========== */
.page-about .about-position {
  background: var(--about-white);
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}
.page-about .about-position__grid {
  display: grid;
  gap: var(--space-5);
}
.page-about .about-position__side .kicker,
.page-about .about-history__side .kicker {
  color: var(--about-accent);
}
.page-about .about-position__side .lead-note,
.page-about .about-history__side .lead-note {
  margin-top: var(--space-3);
}
.page-about .about-position__content .section-heading {
  color: var(--about-primary);
}
.page-about .about-position__body {
  max-width: 760px;
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-4);
}
.page-about .about-position__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-ink);
}

/* ========== 运营数据 ========== */
.page-about .about-data {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(0, 212, 255, 0.05) 25%, transparent 25%),
    linear-gradient(225deg, rgba(0, 212, 255, 0.05) 25%, transparent 25%),
    var(--about-primary);
  color: var(--about-ink-soft);
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}
.page-about .about-data::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--about-accent) 0%, var(--about-cyan) 40%, transparent 100%);
}
.page-about .about-data__head {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}
.page-about .about-data .section-heading {
  color: var(--about-white);
}
.page-about .about-data .section-heading__line-2 {
  color: var(--about-cyan);
}
.page-about .about-data__note {
  max-width: 300px;
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(230, 237, 245, 0.68);
}
.page-about .about-data__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}
.page-about .about-stat {
  position: relative;
  background: var(--about-stat-bg);
  border: 1px solid var(--about-stat-border);
  padding: var(--space-4) var(--space-3);
}
.page-about .about-stat::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 36px;
  height: 3px;
  background: var(--about-accent);
}
.page-about .about-stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--about-white);
}
.page-about .about-stat__unit {
  display: block;
  margin-top: var(--space-1);
  font-size: 13px;
  color: var(--about-cyan);
}
.page-about .about-stat__label {
  display: block;
  margin-top: var(--space-2);
  font-size: 13px;
  color: rgba(230, 237, 245, 0.72);
}
.page-about .about-data__visual {
  display: grid;
  gap: var(--space-4);
}
.page-about .about-data__figure {
  margin: 0;
  border: 1px solid var(--about-stat-border);
  background: rgba(255, 255, 255, 0.04);
}
.page-about .about-data__figure img {
  display: block;
  width: 100%;
  height: auto;
}
.page-about .about-data__facts {
  display: grid;
  gap: var(--space-3);
}
.page-about .about-data__fact {
  position: relative;
  margin: 0;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-ink-soft);
}
.page-about .about-data__fact::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 8px;
  height: 8px;
  background: var(--about-accent);
  transform: skewX(-20deg);
}
.page-about .about-data__fact-kicker {
  display: block;
  margin-bottom: 2px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--about-cyan);
}

/* ========== 发展历程 ========== */
.page-about .about-history {
  background: var(--about-white);
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}
.page-about .about-history__grid {
  display: grid;
  gap: var(--space-5);
}
.page-about .about-history__content .section-heading {
  color: var(--about-primary);
}
.page-about .about-history__timeline {
  list-style: none;
  margin: var(--space-5) 0 0;
  padding: 0;
  position: relative;
  max-width: 720px;
}
.page-about .about-history__timeline::before {
  content: '';
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--about-accent) 0%, var(--about-cyan) 50%, var(--about-silver) 100%);
}
.page-about .about-history__item {
  position: relative;
  margin-bottom: var(--space-4);
  padding: var(--space-3) var(--space-4) var(--space-3) 48px;
  border: 1px solid transparent;
  transition: background-color var(--transition-base), border-color var(--transition-base);
}
.page-about .about-history__item:last-child {
  margin-bottom: 0;
}
.page-about .about-history__item:hover,
.page-about .about-history__item:focus-within {
  background: rgba(11, 29, 58, 0.04);
  border-color: rgba(255, 107, 53, 0.4);
}
.page-about .about-history__marker {
  position: absolute;
  left: -6px;
  top: 14px;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  font-size: 18px;
  line-height: 1;
  color: var(--about-accent);
  background: var(--about-white);
  border: 1px solid rgba(255, 107, 53, 0.6);
  border-radius: 50%;
  transition: transform var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
}
.page-about .about-history__item:hover .about-history__marker,
.page-about .about-history__item:focus-within .about-history__marker {
  transform: scale(1.15);
  background: var(--about-accent);
  color: var(--about-white);
  border-color: var(--about-accent);
}
.page-about .about-history__phase {
  display: inline-block;
  margin-bottom: var(--space-2);
  padding: 3px 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--about-cyan-ink);
  background: rgba(0, 212, 255, 0.12);
}
.page-about .about-history__body h3 {
  margin: 0 0 var(--space-2);
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1.3;
  color: var(--about-primary);
}
.page-about .about-history__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-ink);
}

/* ========== 资质与合规 ========== */
.page-about .about-compliance {
  position: relative;
  overflow: hidden;
  background: var(--about-deep);
  color: var(--about-ink-soft);
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}
.page-about .about-compliance::after {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  width: 160px;
  height: 160px;
  background: linear-gradient(135deg, transparent 50%, rgba(108, 77, 246, 0.28) 50%);
  pointer-events: none;
}
.page-about .about-compliance__grid {
  display: grid;
  gap: var(--space-5);
}
.page-about .about-compliance__intro .kicker,
.page-about .about-contact__head .kicker {
  color: var(--about-accent);
}
.page-about .about-compliance__intro .section-heading,
.page-about .about-compliance .section-heading {
  color: var(--about-white);
}
.page-about .about-compliance__desc {
  max-width: 300px;
  margin: var(--space-3) 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(230, 237, 245, 0.7);
}
.page-about .about-compliance__panel {
  border: 2px solid var(--about-silver);
  background: rgba(255, 255, 255, 0.04);
  padding: var(--space-5);
}
.page-about .about-compliance__badge {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding-bottom: var(--space-4);
  margin-bottom: var(--space-4);
  border-bottom: 1px solid rgba(192, 192, 192, 0.45);
}
.page-about .about-compliance__badge-icon {
  font-size: 42px;
  line-height: 1;
  color: var(--about-accent);
}
.page-about .about-compliance__badge-label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--about-silver);
}
.page-about .about-compliance__badge-value {
  font-family: var(--font-mono);
  font-size: 20px;
  letter-spacing: 0.03em;
  color: var(--about-white);
}
.page-about .about-compliance__list {
  list-style: none;
  margin: 0 0 var(--space-5);
  padding: 0;
  display: grid;
  gap: var(--space-3);
}
.page-about .about-compliance__list li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-ink-soft);
}
.page-about .about-compliance__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 12px;
  height: 2px;
  background: var(--about-accent);
}
.page-about .about-compliance__figure {
  margin: 0;
  border: 1px solid rgba(192, 192, 192, 0.45);
}
.page-about .about-compliance__figure img {
  display: block;
  width: 100%;
  height: auto;
}

/* ========== 联系信息 ========== */
.page-about .about-contact {
  background: var(--about-light);
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}
.page-about .about-contact__head {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}
.page-about .about-contact__head .section-heading {
  color: var(--about-primary);
}
.page-about .about-contact__note {
  max-width: 340px;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-ink);
}
.page-about .about-contact__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}
.page-about .about-contact__card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-4);
  text-decoration: none;
  color: var(--about-ink);
  background: var(--about-white);
  border: 1px solid var(--about-silver);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.page-about .about-contact__card:hover,
.page-about .about-contact__card:focus-visible {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(11, 29, 58, 0.14);
  border-color: var(--about-accent);
}
.page-about .about-contact__card-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--about-cyan-ink);
}
.page-about .about-contact__card-value {
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1.5;
  color: var(--about-primary);
  word-break: break-word;
}
.page-about .about-contact__card-action {
  margin-top: auto;
  font-size: 13px;
  font-weight: 700;
  color: var(--about-accent);
}
.page-about .about-contact__card--static {
  cursor: default;
}
.page-about .about-contact__card-note {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(13, 27, 42, 0.75);
}
.page-about .about-contact__footer {
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--about-silver);
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-ink);
}
.page-about .about-contact__footer a {
  color: var(--about-cyan-ink);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid var(--about-accent);
}
.page-about .about-contact__footer a:hover {
  color: var(--about-accent);
}

/* ========== 响应式布局 ========== */
@media (min-width: 640px) {
  .page-about .about-contact__cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .about-contact__head {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
  }
}

@media (min-width: 768px) {
  .page-about .about-data__stats {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-4);
  }
  .page-about .about-stat {
    padding: var(--space-5) var(--space-4);
  }
  .page-about .about-data__head {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
  }
  .page-about .about-compliance__panel {
    padding: var(--space-6);
  }
  .page-about .about-compliance__badge-value {
    font-size: 26px;
  }
}

@media (min-width: 900px) {
  .page-about .about-data__visual {
    grid-template-columns: 1.25fr 0.75fr;
    align-items: center;
    gap: var(--space-6);
  }
  .page-about .about-position__grid {
    grid-template-columns: 260px 1fr;
    gap: var(--space-7);
  }
  .page-about .about-position__body {
    margin-top: var(--space-5);
  }
  .page-about .about-history__grid {
    grid-template-columns: 260px 1fr;
    gap: var(--space-7);
  }
  .page-about .about-compliance__grid {
    grid-template-columns: 0.7fr 1.3fr;
    gap: var(--space-7);
    align-items: start;
  }
}

@media (min-width: 992px) {
  .page-about .about-hero {
    padding-top: var(--space-7);
  }
  .page-about .about-hero__grid {
    grid-template-areas: "rail main visual";
    grid-template-columns: 180px 1fr 320px;
    gap: 0 var(--space-6);
    align-items: start;
  }
  .page-about .about-hero__rail {
    position: sticky;
    top: var(--space-6);
    flex-direction: column;
    align-items: flex-start;
    border-left: 3px solid var(--about-accent);
    padding-left: var(--space-4);
  }
}

@media (min-width: 1024px) {
  .page-about .about-contact__cards {
    grid-template-columns: repeat(4, 1fr);
  }
}