.page-about {
  --about-line: rgba(42, 74, 64, 0.6);
  --about-hair: rgba(143, 166, 158, 0.22);
  padding-bottom: 0;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 20px 0 0;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.page-about .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 40px 0 64px;
  background:
    radial-gradient(880px 520px at 84% -14%, rgba(242, 193, 78, 0.15), transparent 62%),
    radial-gradient(680px 460px at 2% 112%, rgba(230, 57, 70, 0.13), transparent 66%),
    var(--ink);
}
.page-about .about-hero__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(42, 74, 64, 0.4) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42, 74, 64, 0.4) 1px, transparent 1px);
  background-size: 68px 68px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.25) 62%, transparent 92%);
  mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.25) 62%, transparent 92%);
}
.page-about .about-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}
.page-about .about-hero__kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--gold);
  text-transform: uppercase;
}
.page-about .about-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(32px, 7.4vw, 60px);
  line-height: 1.06;
  letter-spacing: -0.015em;
  color: var(--paper);
}
.page-about .about-hero__lead {
  margin: 0 0 28px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 247, 245, 0.82);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .about-hero__aside {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.page-about .hero-panel {
  border: 2px solid var(--ink-3);
  background: rgba(18, 53, 44, 0.72);
  box-shadow: var(--shadow-sm);
}
.page-about .hero-panel__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--about-line);
}
.page-about .hero-panel__row:last-child {
  border-bottom: 0;
}
.page-about .hero-panel__row--accent {
  background: rgba(230, 57, 70, 0.12);
  border-left: 4px solid var(--red);
}
.page-about .hero-panel__k {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.page-about .hero-panel__v {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  color: var(--gold);
}
.page-about .hero-panel__row--accent .hero-panel__v {
  color: var(--paper);
}
.page-about .about-hero__note {
  margin: 0;
  padding-left: 12px;
  border-left: 2px solid var(--gold);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  padding: 56px 0;
  border-top: 1px solid var(--about-line);
}
.page-about .about-chapter__inner {
  display: block;
}
.page-about .about-chapter__head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 34px;
}
.page-about .about-chapter h2 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(24px, 5vw, 38px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-about .about-chapter__lede {
  margin: 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 247, 245, 0.76);
}
.page-about .about-chapter[data-active] .idx-tag {
  background: var(--gold);
  color: var(--ink);
  border-color: var(--gold);
}

/* ---------- 01 品牌缘起 ---------- */
.page-about .origin-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
.page-about .origin-media {
  margin: 0;
  border: 2px solid var(--ink-3);
}
.page-about .origin-text p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 247, 245, 0.82);
}
.page-about .origin-points {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid var(--about-line);
}
.page-about .origin-points li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 13px 0;
  border-bottom: 1px solid var(--about-line);
  font-size: 14px;
  line-height: 1.7;
  color: rgba(244, 247, 245, 0.86);
}
.page-about .origin-points .mono {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gold);
  padding-top: 3px;
}

/* ---------- 02 时间线 ---------- */
.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0 0 0 0;
  position: relative;
}
.page-about .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--ink-3) 70%, transparent 100%);
}
.page-about .tl__item {
  position: relative;
  padding: 0 0 30px 38px;
}
.page-about .tl__item:last-child {
  padding-bottom: 0;
}
.page-about .tl__marker {
  position: absolute;
  left: 0;
  top: 5px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink);
  border: 3px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(242, 193, 78, 0.12);
}
.page-about .tl__year {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--gold);
}
.page-about .tl__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.4;
  color: var(--paper);
}
.page-about .tl__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(244, 247, 245, 0.76);
}

/* ---------- 03 版本对比 ---------- */
.page-about .ver-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.page-about .ver-card {
  border: 2px solid var(--ink-3);
  background: var(--ink-2);
  box-shadow: var(--shadow-sm);
  padding: 20px 20px 8px;
}
.page-about .ver-card--v4 {
  border-color: var(--gold);
  box-shadow: 6px 6px 0 rgba(242, 193, 78, 0.24);
}
.page-about .ver-card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 14px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--about-line);
}
.page-about .ver-card__meta {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.page-about .ver-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .ver-list li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 13px 0;
  border-bottom: 1px solid var(--about-line);
}
.page-about .ver-list li:last-child {
  border-bottom: 0;
}
.page-about .ver-list__k {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.page-about .ver-list__v {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(244, 247, 245, 0.9);
}
.page-about .ver-card--v4 .ver-list__v {
  color: var(--gold-2);
}
.page-about .version-media {
  margin: 26px 0 0;
  border: 2px solid var(--ink-3);
}
.page-about .version-note {
  margin: 18px 0 0;
  padding: 14px 16px;
  border-left: 4px solid var(--gold);
  background: rgba(242, 193, 78, 0.07);
  font-size: 14px;
  line-height: 1.8;
  color: rgba(244, 247, 245, 0.86);
}
.page-about .version-note a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 193, 78, 0.45);
}
.page-about .version-note a:hover,
.page-about .version-note a:focus-visible {
  color: var(--gold-2);
  border-bottom-color: var(--gold-2);
}

/* ---------- 04 规则档案 ---------- */
.page-about .rules-table-wrap {
  overflow-x: auto;
  border: 2px solid var(--ink-3);
  box-shadow: var(--shadow-sm);
  background: var(--ink-2);
  -webkit-overflow-scrolling: touch;
}
.page-about .rules-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 14px;
}
.page-about .rules-table caption {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}
.page-about .rules-table thead th {
  text-align: left;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink);
  background: var(--gold);
  border-bottom: 2px solid var(--ink-3);
}
.page-about .rules-table tbody th {
  text-align: left;
  padding: 15px 16px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 14px;
  color: var(--gold);
  white-space: nowrap;
  border-bottom: 1px solid var(--about-line);
  vertical-align: top;
}
.page-about .rules-table tbody td {
  padding: 15px 16px;
  line-height: 1.75;
  color: rgba(244, 247, 245, 0.82);
  border-bottom: 1px solid var(--about-line);
  vertical-align: top;
}
.page-about .rules-table tbody tr:last-child th,
.page-about .rules-table tbody tr:last-child td {
  border-bottom: 0;
}
.page-about .rules-table tbody tr:hover th,
.page-about .rules-table tbody tr:hover td {
  background: rgba(242, 193, 78, 0.06);
}
.page-about .rules-table .mono {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--gold-2);
}
.page-about .rules-foot {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 05 运营体系 ---------- */
.page-about .ops-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}
.page-about .ops-media {
  margin: 0;
  border: 2px solid var(--ink-3);
}
.page-about .ops-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
}
.page-about .ops-stat {
  border: 2px solid var(--ink-3);
  background: var(--ink-2);
  padding: 16px 14px;
}
.page-about .ops-stat dt {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.page-about .ops-stat dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
}
.page-about .ops-stat__n {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}
.page-about .ops-stat__u {
  font-size: 12px;
  color: var(--muted);
}
.page-about .ops-notes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 30px;
}
.page-about .ops-note {
  border-left: 3px solid var(--red);
  padding: 2px 0 2px 18px;
}
.page-about .ops-note h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 16px;
  color: var(--paper);
}
.page-about .ops-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(244, 247, 245, 0.78);
}
.page-about .ops-note a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 193, 78, 0.45);
}
.page-about .ops-note a:hover,
.page-about .ops-note a:focus-visible {
  color: var(--gold-2);
  border-bottom-color: var(--gold-2);
}

/* ---------- 06 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.page-about .team-card {
  position: relative;
  border: 2px solid var(--ink-3);
  background: var(--ink-2);
  padding: 20px 18px 18px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.18s ease, border-color 0.18s ease;
}
.page-about .team-card:hover {
  transform: translate(-3px, -3px);
  border-color: var(--gold);
}
.page-about .team-card__no {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--red);
}
.page-about .team-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  color: var(--paper);
}
.page-about .team-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(244, 247, 245, 0.76);
}

/* ---------- 07 合作生态 ---------- */
.page-about .eco-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.page-about .eco-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--about-line);
}
.page-about .eco-list li {
  padding: 18px 0;
  border-bottom: 1px solid var(--about-line);
}
.page-about .eco-list h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 16px;
  color: var(--gold);
}
.page-about .eco-list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(244, 247, 245, 0.78);
}
.page-about .eco-badge {
  border: 2px solid var(--gold);
  background: var(--ink-2);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.4);
  padding: 24px 20px;
}
.page-about .eco-badge__label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--muted);
}
.page-about .eco-badge__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gold);
}
.page-about .eco-badge__desc {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(244, 247, 245, 0.8);
}
.page-about .eco-badge__foot {
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--about-line);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  border-top: 1px solid var(--about-line);
  background:
    radial-gradient(620px 300px at 18% 0%, rgba(242, 193, 78, 0.13), transparent 68%),
    var(--ink-2);
  padding: 50px 0 60px;
}
.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
}
.page-about .about-cta h2 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(22px, 4.4vw, 32px);
  line-height: 1.2;
  color: var(--paper);
}
.page-about .about-cta__text p {
  margin: 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(244, 247, 245, 0.76);
}
.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 图片通用 ---------- */
.page-about .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .media-caption {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
  background: rgba(11, 31, 26, 0.6);
  border-top: 1px solid var(--about-line);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .ops-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .ops-notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .eco-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 28px;
  }
}

@media (min-width: 900px) {
  .page-about .breadcrumb {
    padding-top: 24px;
  }
  .page-about .about-hero {
    padding: 56px 0 84px;
  }
  .page-about .about-hero__inner {
    grid-template-columns: 7fr 5fr;
    gap: 52px;
    align-items: end;
  }
  .page-about .about-chapter {
    padding: 76px 0;
  }
  .page-about .about-chapter__head {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 24px;
    margin-bottom: 42px;
  }
  .page-about .about-chapter__head .idx-tag {
    justify-self: start;
  }
  .page-about .origin-layout {
    grid-template-columns: 5fr 7fr;
    gap: 44px;
    align-items: start;
  }
  .page-about .tl {
    padding-left: 8px;
  }
  .page-about .tl__item {
    display: grid;
    grid-template-columns: 148px minmax(0, 1fr);
    gap: 28px;
    padding: 0 0 36px 44px;
  }
  .page-about .tl__year {
    text-align: right;
    padding-top: 3px;
    margin: 0;
  }
  .page-about .ver-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }
  .page-about .ver-list li {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
  .page-about .ops-layout {
    grid-template-columns: 5fr 7fr;
    gap: 40px;
    align-items: start;
  }
  .page-about .ops-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .ops-notes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
    margin-top: 44px;
  }
  .page-about .team-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }
  .page-about .eco-layout {
    grid-template-columns: 7fr 5fr;
    gap: 44px;
    align-items: start;
  }
  .page-about .eco-list {
    grid-template-columns: 1fr;
  }
  .page-about .about-cta {
    padding: 66px 0 78px;
  }
  .page-about .about-cta__inner {
    grid-template-columns: 7fr 5fr;
    gap: 40px;
  }
  .page-about .about-cta__links {
    justify-content: flex-end;
  }
}

@media (min-width: 1180px) {
  .page-about .ops-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}