/* =============================================
   安博体育 · 品牌概况（/profile/）
   极简文字建筑 + 错位色块 + 非对称两栏时间线
   ============================================= */

.page-about {
  --about-gold: #C9A227;
  --about-border: #2A5A48;
  --about-card: #1A1F1C;
  --about-muted: #A0A0A0;
  --about-gutter: 1.25rem;
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  background: linear-gradient(180deg, var(--primary-deep-green) 0%, var(--dark-bg) 38rem);
  color: var(--text-light);
  font-family: 'Noto Sans SC', 'Helvetica Neue', sans-serif;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  max-width: 80rem;
  margin: 0 auto;
  padding: 1.25rem 1.25rem 0;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--border-color);
}

.page-about .breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--gold-accent);
}

/* ---------- 首屏：错位色块 ---------- */
.page-about .about-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2.5rem;
  max-width: 80rem;
  margin: 0 auto;
  padding: 3rem 1.25rem 4rem;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 1.5rem;
  right: 0;
  width: 44%;
  height: 70%;
  background: linear-gradient(135deg, rgba(201, 162, 39, 0.18), rgba(11, 61, 46, 0.08));
  clip-path: polygon(38% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero-copy,
.page-about .about-hero-media {
  position: relative;
  z-index: 1;
}

.page-about .about-hero-copy {
  padding-left: 1rem;
  border-left: 4px solid var(--gold-accent);
}

.page-about .about-hero-tag {
  margin: 0 0 0.75rem;
  color: var(--gold-accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.page-about .about-hero h1 {
  margin: 0 0 1.25rem;
  font-family: 'Roboto Condensed', 'Impact', sans-serif;
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.01em;
}

.page-about .about-hero h1 span {
  display: block;
  margin-top: 0.5rem;
  font-size: clamp(1rem, 2.4vw, 1.75rem);
  font-weight: 500;
  line-height: 1.6;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.page-about .about-hero-lead {
  max-width: 40rem;
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-muted);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.page-about .about-btn-outline {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-light);
  transition: border-color 0.25s ease, color 0.25s ease, background 0.25s ease;
}

.page-about .about-btn-outline:hover,
.page-about .about-btn-outline:focus-visible {
  border-color: var(--gold-accent);
  color: var(--gold-accent);
  background: rgba(201, 162, 39, 0.06);
}

.page-about .about-hero-media {
  position: relative;
  margin: 0;
  border: 2px solid var(--border-color);
  background: var(--card-bg);
  transform: rotate(1.2deg);
}

.page-about .about-hero-media::after {
  content: "";
  position: absolute;
  right: -0.75rem;
  bottom: -0.75rem;
  width: 2.5rem;
  height: 2.5rem;
  background: var(--gold-accent);
  z-index: -1;
}

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

/* ---------- 两栏布局：左侧固定导航 ---------- */
.page-about .about-layout {
  max-width: 80rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 4.5rem;
}

.page-about .about-nav {
  padding: 1.25rem;
  margin-bottom: 2.5rem;
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--gold-accent);
  background: rgba(26, 31, 28, 0.72);
}

.page-about .about-nav-title {
  margin: 0 0 0.75rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-accent);
}

.page-about .about-nav-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-nav-list li {
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.page-about .about-nav-list a {
  display: block;
  padding: 0.5rem 0;
  color: var(--text-light);
  font-size: 0.9375rem;
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.page-about .about-nav-list a:hover,
.page-about .about-nav-list a:focus-visible {
  color: var(--gold-accent);
  padding-left: 0.25rem;
}

.page-about .about-nav-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  margin: 0 0 4.5rem;
  scroll-margin-top: 5rem;
}

.page-about .about-section-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.75rem;
}

.page-about .about-section-num {
  font-family: 'Roboto Condensed', sans-serif;
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--gold-accent);
}

.page-about .about-section-line {
  width: 3rem;
  height: 2px;
  background: var(--gold-accent);
}

.page-about .about-section h2 {
  margin: 0;
  font-family: 'Roboto Condensed', 'Impact', sans-serif;
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.1;
}

/* ---------- 品牌故事 ---------- */
.page-about .about-prose p {
  margin: 0 0 1.25rem;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text-muted);
}

.page-about .about-prose p:first-child {
  font-size: 1.0625rem;
  color: var(--text-light);
}

/* ---------- 发展里程碑 ---------- */
.page-about .about-milestones {
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.page-about .about-timeline {
  position: relative;
}

.page-about .about-timeline-years {
  display: none;
}

.page-about .about-timeline-items {
  margin: 0;
  padding: 0;
}

.page-about .about-timeline-item {
  position: relative;
  padding: 0 0 2.5rem 1.5rem;
  border-left: 3px solid var(--border-color);
}

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: -0.4375rem;
  top: 0.5rem;
  width: 0.625rem;
  height: 0.625rem;
  background: var(--gold-accent);
  transform: rotate(45deg);
}

.page-about .about-timeline-year {
  display: block;
  margin-bottom: 0.5rem;
  font-family: 'Roboto Condensed', sans-serif;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--gold-accent);
}

.page-about .about-timeline-item h3 {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-light);
}

.page-about .about-timeline-item p {
  margin: 0;
  max-width: 36rem;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--text-muted);
}

/* ---------- 服务能力 ---------- */
.page-about .about-capabilities {
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-bottom: 2rem;
  border: 1px solid var(--border-color);
  background: var(--border-color);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-height: 9rem;
  padding: 1.75rem 1.25rem;
  background: var(--card-bg);
}

.page-about .about-stat-num {
  font-family: 'Roboto Condensed', sans-serif;
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1;
  color: var(--gold-accent);
}

.page-about .about-stat-label {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--text-muted);
}

.page-about .about-capabilities-media {
  position: relative;
  margin: 2rem 0 0;
  border: 2px solid var(--border-color);
  background: var(--card-bg);
}

.page-about .about-capabilities-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-capabilities-media figcaption {
  padding: 0.875rem 1rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ---------- 资质与合作 ---------- */
.page-about .about-quality {
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.page-about .about-quality-grid {
  display: grid;
  gap: 1.5rem;
}

.page-about .about-quality-card {
  position: relative;
  padding: 1.75rem 1.5rem;
  border: 2px solid var(--border-color);
  background: var(--card-bg);
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.page-about .about-quality-card:hover,
.page-about .about-quality-card:focus-within {
  border-color: var(--gold-accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}

.page-about .about-quality-card img {
  display: block;
  width: 100%;
  max-width: 4.5rem;
  height: auto;
  margin-bottom: 1rem;
  padding: 0.25rem;
  border: 1px solid var(--border-color);
}

.page-about .about-quality-card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-light);
}

.page-about .about-quality-card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--text-muted);
}

/* ---------- 底部 CTA ---------- */
.page-about .about-cta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
  padding: 2rem;
  border: 2px solid var(--border-color);
  background: linear-gradient(135deg, rgba(11, 61, 46, 0.6), rgba(26, 31, 28, 0.4));
}

.page-about .about-cta p {
  margin: 0;
  line-height: 1.7;
  color: var(--text-muted);
}

/* =============================================
   桌面端
   ============================================= */
@media (min-width: 1024px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 4rem;
    align-items: center;
    padding: 5rem 2rem 6rem;
  }

  .page-about .about-hero-copy {
    padding-left: 2.25rem;
    border-left-width: 5px;
  }

  .page-about .about-hero h1 {
    font-size: clamp(3.5rem, 6vw, 6.5rem);
  }

  .page-about .about-layout {
    display: grid;
    grid-template-columns: 13.5rem minmax(0, 1fr);
    gap: 3.5rem;
    padding-top: 0.5rem;
  }

  .page-about .about-nav {
    position: sticky;
    top: 6rem;
    align-self: start;
    max-height: calc(100vh - 7rem);
    overflow: auto;
    margin-bottom: 0;
  }

  .page-about .about-main {
    min-width: 0;
  }

  .page-about .about-prose p {
    max-width: 44rem;
  }

  /* 时间线：左侧年份列 + 右侧详情 */
  .page-about .about-timeline {
    display: grid;
    grid-template-columns: 7.5rem minmax(0, 1fr);
    gap: 2.5rem;
  }

  .page-about .about-timeline-years {
    display: flex;
    flex-direction: column;
    gap: 2.4rem;
    font-family: 'Roboto Condensed', sans-serif;
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--gold-accent);
    text-align: right;
  }

  .page-about .about-timeline-year {
    display: none;
  }

  .page-about .about-timeline-item {
    padding-left: 1.75rem;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-quality-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1440px) {
  .page-about .about-hero,
  .page-about .about-layout {
    max-width: 90rem;
  }
}