.page-about {
  --paper: #F5F0E8;
  --bg-ink: #0A0A0A;
}

.page-about__shell {
  max-width: var(--container-w);
  margin-inline: auto;
  padding: 1.5rem var(--gutter) 5rem;
  min-width: 0;
}

.page-about__crumbs {
  margin-bottom: 1.25rem;
}

.page-about__crumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.75rem;
  padding: 0;
  margin: 0;
  font-size: 0.8rem;
  color: var(--blue-gray);
}

.page-about__crumbs a {
  color: var(--blue-gray);
  text-decoration-color: rgba(255, 255, 255, 0.28);
  text-underline-offset: 3px;
}

.page-about__crumbs a:hover,
.page-about__crumbs a:focus-visible {
  color: var(--green);
}

.page-about__crumbs [aria-current="page"] {
  color: var(--white);
}

/* ========== 顶部品牌定位闸口 ========== */
.page-about__gate {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  margin-bottom: 3.5rem;
  overflow: hidden;
}

.page-about__gate::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(122, 139, 163, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(122, 139, 163, 0.09) 1px, transparent 1px);
  background-size: 24px 24px;
}

.page-about__gate::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--green) 0%, var(--gold) 60%, transparent 100%);
  z-index: 2;
}

.page-about__gate-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem 1.75rem;
  padding: 1.75rem;
}

.page-about__gate-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.875rem;
}

.page-about__gate-code {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--blue-gray);
}

.page-about__gate-status {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--green);
}

.page-about__gate h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.2rem, 7vw, 4.8rem);
  line-height: 1.05;
  letter-spacing: 0.01em;
  color: var(--white);
  margin: 0 0 1rem;
}

.page-about__gate-lead {
  color: rgba(245, 240, 232, 0.82);
  font-size: 1rem;
  line-height: 1.8;
  max-width: 34em;
  margin: 0;
}

.page-about__gate-lead strong {
  color: var(--white);
  font-weight: 600;
}

.page-about__gate-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border: 1px solid var(--border-strong);
  background: rgba(11, 30, 58, 0.6);
}

.page-about__gate-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  border-top: 1px solid var(--border);
  padding-top: 1.25rem;
}

.page-about__stat {
  border: 1px solid var(--border);
  background: rgba(11, 30, 58, 0.5);
  padding: 0.75rem 0.875rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-width: 0;
}

.page-about__stat-num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 0.95;
  color: var(--white);
}

.page-about__stat-ver {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.5vw, 2.4rem);
  line-height: 0.95;
  color: var(--gold);
}

.page-about__stat-label {
  font-size: 0.75rem;
  line-height: 1.4;
  color: var(--blue-gray);
}

.page-about__stat--accent {
  border-color: rgba(255, 215, 0, 0.45);
  background: rgba(255, 215, 0, 0.07);
}

/* ========== 主体坐标布局 ========== */
.page-about__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: start;
  min-width: 0;
}

/* ========== 侧边坐标轴索引 ========== */
.page-about__axis {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about__axis-head {
  display: none;
}

.page-about__axis-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 0.25rem;
  min-width: max-content;
}

.page-about__axis-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid transparent;
  color: var(--blue-gray);
  text-decoration: none;
  font-size: 0.8rem;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.page-about__axis-item:hover,
.page-about__axis-item:focus-visible {
  color: var(--white);
  border-color: var(--border);
  background: var(--bg-card);
  outline: none;
}

.page-about__axis-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--green);
}

.page-about__axis-label {
  font-weight: 600;
  white-space: nowrap;
}

.page-about__axis-cls {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  color: var(--blue-gray);
  white-space: nowrap;
}

/* ========== 内容块通用 ========== */
.page-about__content {
  min-width: 0;
}

.page-about__section {
  margin-bottom: 4rem;
  scroll-margin-top: calc(var(--header-h) + 1.5rem);
}

.page-about__section-head {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.75rem;
  margin-bottom: 1.75rem;
  min-width: 0;
}

.page-about__section-code {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--green);
}

.page-about__section-head h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.8rem, 4.5vw, 2.8rem);
  line-height: 1.15;
  letter-spacing: 0.02em;
  color: var(--white);
  margin: 0;
}

.page-about__section:target {
  animation: page-about-pulse 1.2s ease;
}

@keyframes page-about-pulse {
  0% {
    background-color: rgba(255, 215, 0, 0.12);
  }
  100% {
    background-color: transparent;
  }
}

/* ========== 01 品牌定位 ========== */
.page-about__pos-body {
  display: grid;
  gap: 1.1rem;
  min-width: 0;
}

.page-about__section-lead {
  font-size: 1.125rem;
  line-height: 1.65;
  color: var(--paper);
  border-left: 3px solid var(--green);
  padding-left: 1rem;
  margin: 0 0 0.25rem;
}

.page-about__pos-body p {
  color: rgba(245, 240, 232, 0.8);
  line-height: 1.8;
  max-width: 34em;
  margin: 0;
}

.page-about__pos-body strong {
  color: var(--white);
  font-weight: 600;
}

.page-about__pos-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

/* ========== 02 发展轨迹 ========== */
.page-about__section--trail .page-about__section-desc {
  color: rgba(245, 240, 232, 0.82);
  line-height: 1.8;
  max-width: 36em;
  margin-bottom: 2rem;
}

.page-about__trail-track {
  position: relative;
  padding: 1.5rem 0 1rem;
  border: 1px solid var(--border);
  background: rgba(27, 58, 107, 0.3);
  min-width: 0;
}

.page-about__trail-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.page-about__trail-rail {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0;
  padding: 0 1rem;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem 0.75rem;
  min-width: 0;
}

.page-about__trail-node {
  position: relative;
  padding: 1.1rem 0.25rem 0.5rem;
  border-top: 2px solid var(--border-strong);
  min-width: 0;
}

.page-about__trail-node::before {
  content: "";
  position: absolute;
  left: 0.9rem;
  top: -7px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg-deep);
  border: 2px solid var(--blue-gray);
  box-sizing: border-box;
}

.page-about__trail-node--done::before {
  border-color: var(--green);
}

.page-about__trail-node--current {
  border-top-color: var(--gold);
}

.page-about__trail-node--current::before {
  border-color: var(--gold);
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.16);
}

.page-about__trail-ver {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--white);
  margin-bottom: 0.4rem;
}

.page-about__trail-node--current .page-about__trail-ver {
  color: var(--gold);
}

.page-about__trail-title {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--white);
  margin-bottom: 0.3rem;
}

.page-about__trail-desc {
  display: block;
  font-size: 0.78rem;
  line-height: 1.55;
  color: var(--blue-gray);
}

.page-about__trail-facts {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem;
}

.page-about__trail-facts li {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1rem;
  border: 1px solid var(--border);
  background: rgba(27, 58, 107, 0.35);
  min-width: 0;
}

.page-about__fact-num {
  font-family: var(--font-display);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--green);
}

.page-about__fact-label {
  font-size: 0.83rem;
  line-height: 1.5;
  color: rgba(245, 240, 232, 0.78);
}

/* ========== 03 数据覆盖能力（暖纸色面板） ========== */
.page-about__section--data {
  background: var(--paper);
  color: #0A1A30;
  border: 1px solid rgba(255, 255, 255, 0.18);
  padding: 1.5rem 1.25rem;
  min-width: 0;
}

.page-about__section--data .page-about__section-head {
  border-bottom-color: rgba(10, 26, 48, 0.16);
}

.page-about__section--data .page-about__section-code {
  color: #0B5A3B;
}

.page-about__section--data .page-about__section-head h2 {
  color: #0A1A30;
}

.page-about__data-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  min-width: 0;
}

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

.page-about__section--data .page-about__section-lead {
  color: #0A1A30;
  border-left-color: #0B5A3B;
  font-size: 1.05rem;
}

.page-about__data-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border: 1px solid rgba(10, 26, 48, 0.22);
  margin-top: 1.25rem;
  background: rgba(10, 26, 48, 0.08);
}

.page-about__data-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  min-width: 0;
}

.page-about__data-stat {
  border: 1px solid rgba(10, 26, 48, 0.18);
  background: rgba(255, 255, 255, 0.5);
  padding: 0.85rem 0.875rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-width: 0;
}

.page-about__data-value {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 0.95;
  color: #0A1A30;
}

.page-about__data-text {
  font-size: 0.8rem;
  line-height: 1.45;
  color: rgba(10, 26, 48, 0.75);
}

.page-about__data-stat--gold {
  border-color: rgba(160, 120, 0, 0.4);
  background: rgba(255, 215, 0, 0.12);
}

.page-about__data-stat--gold .page-about__data-value {
  color: #8A6D00;
}

.page-about__league-panel {
  margin-top: 1.75rem;
  border: 1px solid rgba(10, 26, 48, 0.22);
  background: rgba(255, 255, 255, 0.45);
  padding: 1.15rem 1rem;
}

.page-about__league-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem 1rem;
  margin-bottom: 0.75rem;
}

.page-about__league-title {
  color: #0A1A30;
  font-weight: 600;
  font-size: 0.95rem;
}

.page-about__league-hint {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: rgba(10, 26, 48, 0.58);
}

.page-about__league-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-about__data-foot {
  margin-top: 1.5rem;
  padding: 0.875rem 1rem;
  border-left: 3px solid #C99700;
  background: rgba(255, 215, 0, 0.1);
  color: rgba(10, 26, 48, 0.85);
  font-size: 0.9rem;
  line-height: 1.75;
}

/* ========== 04 天津本地化服务 ========== */
.page-about__section--tj {
  min-width: 0;
}

.page-about__tj-body {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  min-width: 0;
  padding-top: 0.25rem;
}

.page-about__tj-body::before {
  content: "";
  position: absolute;
  top: -0.5rem;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), transparent 70%);
}

.page-about__tj-text {
  min-width: 0;
}

.page-about__tj-text p {
  color: rgba(245, 240, 232, 0.82);
  line-height: 1.8;
  max-width: 34em;
  margin: 0 0 1rem;
}

.page-about__tj-text strong {
  color: var(--white);
}

.page-about__tj-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border: 1px solid var(--border);
}

/* ========== 05 合规与联系 ========== */
.page-about__compliance {
  display: grid;
  gap: 1.25rem;
  background: var(--bg-ink);
  border: 1px solid rgba(255, 255, 255, 0.14);
  padding: 1.5rem 1.25rem;
  min-width: 0;
}

.page-about__compliance::before {
  content: "";
  height: 2px;
  background: linear-gradient(90deg, var(--red), var(--gold) 50%, transparent 100%);
}

.page-about__compliance-note {
  min-width: 0;
}

.page-about__compliance-note p {
  color: rgba(245, 240, 232, 0.78);
  font-size: 0.9rem;
  line-height: 1.75;
  margin: 0 0 0.75rem;
  max-width: 40em;
}

.page-about__compliance-note p:last-child {
  margin-bottom: 0;
}

.page-about__contact-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  min-width: 0;
}

.page-about__contact-card {
  border: 1px solid rgba(255, 255, 255, 0.14);
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-width: 0;
}

.page-about__contact-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--blue-gray);
}

.page-about__contact-value {
  color: var(--white);
  font-weight: 500;
  font-size: 0.95rem;
  word-break: break-all;
}

/* ========== 响应式：平板及以上 ========== */
@media (min-width: 48rem) {
  .page-about__gate-inner {
    grid-template-columns: 1.1fr 1fr;
    gap: 1.5rem 2rem;
  }

  .page-about__gate-stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about__trail-rail {
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
  }

  .page-about__data-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 2rem;
  }

  .page-about__tj-body {
    grid-template-columns: 1fr 0.85fr;
    gap: 2.5rem;
    align-items: center;
  }

  .page-about__contact-cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about__section--data {
    padding: 2rem 1.75rem;
  }

  .page-about__compliance {
    padding: 1.75rem 1.5rem;
  }
}

/* ========== 响应式：桌面端 ========== */
@media (min-width: 64rem) {
  .page-about__gate {
    margin-bottom: 4.5rem;
  }

  .page-about__gate-inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 2.25rem 3rem;
    padding: 2.5rem 3rem;
  }

  .page-about__gate-text {
    grid-column: 1;
    grid-row: 1;
  }

  .page-about__gate-img {
    grid-column: 2;
    grid-row: 1;
    align-self: start;
  }

  .page-about__gate-stats {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .page-about__layout {
    grid-template-columns: 14rem 1fr;
    gap: 4rem;
  }

  .page-about__axis {
    position: sticky;
    top: calc(var(--header-h) + 2rem);
    align-self: start;
    border: none;
    padding: 0;
    overflow: visible;
    background: transparent;
  }

  .page-about__axis-head {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 0.25rem;
    margin-left: 1.25rem;
  }

  .page-about__axis-title {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.18em;
    color: var(--blue-gray);
    white-space: nowrap;
  }

  .page-about__axis-list {
    flex-direction: column;
    gap: 0;
    min-width: 0;
    position: relative;
    margin-left: 1.25rem;
    padding-left: 0;
  }

  .page-about__axis-list::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 1px;
    background: linear-gradient(
      to bottom,
      rgba(122, 139, 163, 0.5),
      rgba(122, 139, 163, 0.12) 100%
    );
  }

  .page-about__axis-item {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border: none;
    background: transparent;
    padding: 0.875rem 0 0.875rem 1.25rem;
    white-space: normal;
    width: 100%;
  }

  .page-about__axis-item::before {
    content: "";
    position: absolute;
    left: -4px;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--bg-deep);
    border: 1px solid var(--blue-gray);
    transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
  }

  .page-about__axis-item:hover,
  .page-about__axis-item:focus-visible {
    background: transparent;
    border-color: transparent;
  }

  .page-about__axis-item:hover::before,
  .page-about__axis-item:focus-visible::before {
    border-color: var(--green);
    background: var(--green);
    box-shadow: 0 0 0 3px rgba(0, 230, 118, 0.18);
  }

  .page-about__axis-cls {
    display: none;
  }

  .page-about__section {
    margin-bottom: 5rem;
  }
}