/* ============================================================
   品牌与志 · page-about 页面专属样式
   作用域全部限定在 .page-about 内，不与共享样式冲突
   ============================================================ */

.page-about {
  --about-panel: #101826;
  --about-line: rgba(148, 163, 184, 0.16);
  --about-neon-soft: rgba(0, 255, 194, 0.12);
  --about-flame-soft: rgba(255, 90, 60, 0.15);
  background: var(--bg-base);
  color: var(--text-primary);
  overflow-x: hidden;
}

/* ---------- 面包屑微调 ---------- */
.page-about .breadcrumb {
  margin-top: calc(var(--header-h) + 24px);
}

/* ---------- 首屏 Hero ---------- */
.page-about .about-hero {
  position: relative;
  padding: 48px 0 64px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 88% 18%, var(--about-neon-soft), transparent 32%),
    linear-gradient(118deg, transparent 58%, rgba(0, 255, 194, 0.04) 58%);
}

.page-about .about-hero::after {
  content: "EST. 2016";
  position: absolute;
  right: var(--gutter);
  bottom: 12px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.3em;
  color: var(--text-muted);
  pointer-events: none;
}

.page-about .about-hero-grid {
  position: relative;
  display: grid;
  gap: 36px;
  align-items: center;
}

.page-about .about-hero-main {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.page-about .about-hero-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--flame);
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  margin-bottom: 16px;
}

.page-about .about-hero-label::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--flame);
  display: inline-block;
}

.page-about .about-hero h1 {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(2.4rem, 7vw, 4.8rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
  margin: 0 0 8px;
}

.page-about .about-hero .lead {
  font-family: var(--font-heading);
  font-size: clamp(1.2rem, 2.4vw, 1.6rem);
  font-weight: 600;
  color: var(--neon);
  letter-spacing: 0.02em;
  margin: 0 0 20px;
}

.page-about .about-hero-desc {
  max-width: 56ch;
  color: var(--text-secondary);
  line-height: 1.75;
  margin: 0 0 28px;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero-side {
  display: grid;
  gap: 16px;
}

/* ---------- 媒体图框统一切角 ---------- */
.page-about .media-frame {
  position: relative;
  margin: 0;
  border: 1px solid var(--surface-border);
  background: var(--bg-elevated);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}

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

.page-about .media-frame figcaption {
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 12px 16px;
  line-height: 1.5;
}

/* ---------- 首屏数据条 ---------- */
.page-about .hero-stat-strip {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.page-about .hero-stat {
  padding: 14px 16px;
  background: var(--bg-elevated);
  border-left: 3px solid var(--neon);
}

.page-about .hero-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-primary);
}

.page-about .hero-stat-label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-top: 4px;
}

/* ---------- 章节通用 ---------- */
.page-about .section-block {
  position: relative;
  padding: 64px 0;
}

.page-about .section-block + .section-block {
  border-top: 1px solid var(--surface-border);
}

.page-about .section-heading {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-left: 16px;
  margin-bottom: 28px;
}

.page-about .section-heading::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 3px;
  background: linear-gradient(to bottom, var(--neon), var(--flame));
}

.page-about .section-index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--flame);
  letter-spacing: 0.18em;
}

.page-about .section-heading h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.7rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0;
}

.page-about .section-body {
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 64ch;
}

/* ---------- 为什么叫赛况主场 ---------- */
.page-about .why-section {
  background: var(--bg-elevated);
}

.page-about .stat-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 8px;
}

.page-about .stat-tags span {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--neon);
  border: 1px solid var(--surface-border);
  background: var(--bg-base);
  padding: 6px 10px;
}

.page-about .why-quote {
  margin: 32px 0;
  padding: 24px 0 24px 22px;
  border-left: 3px solid var(--neon);
  background: linear-gradient(90deg, var(--about-neon-soft), transparent 72%);
}

.page-about .why-quote p {
  font-family: var(--font-heading);
  font-size: clamp(1.2rem, 2.4vw, 1.8rem);
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
  margin: 0;
}

.page-about .why-points {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

.page-about .why-points li {
  padding: 16px 0;
  border-bottom: 1px solid var(--about-line);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .why-points li:last-child {
  border-bottom: none;
}

.page-about .why-points strong {
  font-family: var(--font-heading);
  font-size: 1.02rem;
  color: var(--text-primary);
}

.page-about .why-points span {
  font-size: 0.92rem;
  color: var(--text-secondary);
}

/* ---------- 发展里程碑 ---------- */
.page-about .timeline-wrap {
  display: grid;
  gap: 40px;
  margin-top: 40px;
}

.page-about .timeline-list {
  position: relative;
  padding-left: 28px;
}

.page-about .timeline-list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 16px;
  width: 1px;
  background: linear-gradient(to bottom, var(--neon), var(--surface-border));
}

.page-about .timeline-node {
  position: relative;
  padding: 0 0 30px;
  margin: 0;
}

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

.page-about .timeline-node::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 4px;
  width: 11px;
  height: 11px;
  background: var(--bg-base);
  border: 2px solid var(--neon);
  border-radius: 50%;
}

.page-about .timeline-node[open]::before {
  background: var(--neon);
  box-shadow: 0 0 14px rgba(0, 255, 194, 0.5);
}

.page-about .timeline-node summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 14px;
}

.page-about .timeline-node summary::-webkit-details-marker {
  display: none;
}

.page-about .timeline-node summary:hover .tl-title {
  color: var(--text-primary);
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 2.5vw, 2.1rem);
  font-weight: 600;
  line-height: 1;
  color: var(--text-primary);
}

.page-about .tl-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-secondary);
  transition: color 0.2s;
}

.page-about .timeline-node[open] .tl-title {
  color: var(--neon);
}

.page-about .timeline-node p {
  margin: 12px 0 0;
  max-width: 60ch;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* ---------- 本地化服务 ---------- */
.page-about .local-body {
  max-width: 72ch;
}

.page-about .local-intro {
  color: var(--text-secondary);
  line-height: 1.75;
  margin: 0 0 28px;
}

.page-about .local-info-grid {
  display: grid;
  gap: 14px;
  margin: 0 0 28px;
}

.page-about .local-info-card {
  background: var(--bg-elevated);
  border-left: 3px solid var(--flame);
  padding: 16px 18px;
}

.page-about .local-info-label {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--text-muted);
}

.page-about .local-info-card p {
  margin: 6px 0 0;
}

.page-about .local-info-main {
  font-family: var(--font-mono);
  font-size: 0.94rem;
  color: var(--text-primary);
  word-break: break-all;
}

.page-about .local-info-main a {
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--surface-border);
  transition: color 0.2s, border-color 0.2s;
}

.page-about .local-info-main a:hover {
  color: var(--neon);
  border-color: var(--neon);
}

.page-about .local-info-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ---------- 数据中立声明 ---------- */
.page-about .neutrality-section {
  background: var(--bg-elevated);
}

.page-about .neutrality-lead {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  line-height: 1.7;
  color: var(--text-primary);
  max-width: 64ch;
  margin: 0 0 40px;
}

.page-about .neutrality-cards {
  display: grid;
  gap: 1px;
  background: var(--surface-border);
  border: 1px solid var(--surface-border);
}

.page-about .neutrality-card {
  background: var(--bg-base);
  padding: 28px 24px;
}

.page-about .neutrality-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2rem, 4vw, 3.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--neon);
}

.page-about .neutrality-card h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  margin: 14px 0 8px;
  color: var(--text-primary);
}

.page-about .neutrality-card p {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--text-secondary);
  margin: 0;
}

.page-about .neutrality-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 40px;
}

/* ---------- 响应式：平板及以上 ---------- */
@media (min-width: 720px) {
  .page-about .hero-stat-strip {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .why-layout {
    display: grid;
    grid-template-columns: 0.9fr 1.6fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .why-layout .section-heading {
    margin-top: 12px;
  }

  .page-about .local-info-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--surface-border);
    border: 1px solid var(--surface-border);
  }

  .page-about .local-info-card {
    background: var(--bg-base);
    border-left: none;
    border-top: 3px solid var(--flame);
  }

  .page-about .neutrality-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---------- 响应式：桌面 ---------- */
@media (min-width: 980px) {
  .page-about .about-hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 56px;
  }

  .page-about .section-block {
    padding: 84px 0;
  }

  .page-about .timeline-wrap {
    grid-template-columns: 380px 1fr;
    gap: 56px;
    align-items: start;
  }
}