/* ============================================================
   品牌与团队 · 页面作用域 .page-about
   ============================================================ */

.page-about {
  --about-axis-w: 176px;
  --about-ink-line: 1px solid var(--rule);
  color: var(--ink);
}

/* ---------- 区块纵向节奏 ---------- */
.page-about .about-block {
  padding-block: 60px;
}

@media (min-width: 860px) {
  .page-about .about-block {
    padding-block: 96px;
  }
}

/* ---------- 通用排版 ---------- */
.page-about h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(23px, 3.2vw, 36px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-about .section-head {
  margin-bottom: 32px;
}

.page-about .section-head > div {
  min-width: 0;
}

.page-about .section-head .eyebrow {
  margin: 0 0 10px;
}

.page-about .about-note {
  margin: 0;
  max-width: 30em;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

@media (min-width: 860px) {
  .page-about .section-head {
    margin-bottom: 48px;
  }
}

@media (max-width: 719px) {
  .page-about .section-head {
    display: block;
  }
  .page-about .about-note {
    margin-top: 12px;
  }
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: 40px 48px;
  background: var(--paper);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -70px;
  right: -110px;
  width: min(560px, 72vw);
  height: 310px;
  background: var(--sheen);
  opacity: 0.08;
  transform: rotate(-9deg);
  pointer-events: none;
}

.page-about .about-hero .shell {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 30px;
}

.page-about .about-hero-grid {
  display: grid;
  gap: 32px;
}

@media (min-width: 980px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    gap: 60px;
    align-items: end;
  }
  .page-about .about-hero {
    padding-block: 64px 80px;
  }
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-head);
  font-size: clamp(30px, 6vw, 54px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-about .about-hero .lead {
  margin: 0;
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.85;
  color: var(--ink-soft);
}

/* 首屏数据格 */
.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-about .about-fact {
  margin: 0;
  padding: 16px 16px 18px;
  background: var(--paper);
}

.page-about .about-fact dt {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

.page-about .about-fact dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.35;
  color: var(--ink);
}

.page-about .about-fact dd .num {
  font-family: var(--font-num);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--cinnabar-deep);
  font-variant-numeric: tabular-nums;
}

/* ---------- 团队构成 ---------- */
.page-about .about-team-layout {
  display: grid;
  gap: 32px;
}

@media (min-width: 900px) {
  .page-about .about-team-layout {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 48px;
    align-items: start;
  }
}

.page-about .about-team-figure {
  margin: 0;
}

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

@media (min-width: 700px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
}

.page-about .about-role {
  position: relative;
  margin: 0;
  padding: 22px 20px 24px;
  background: var(--paper);
  transition: transform 220ms var(--ease), border-color 220ms var(--ease), box-shadow 220ms var(--ease);
}

.page-about .about-role:hover,
.page-about .about-role:focus-within {
  transform: translateY(-2px);
  border-color: var(--gold);
  box-shadow: 0 0 0 1px var(--gold);
}

.page-about .about-role-no {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--gold-deep);
}

.page-about .about-role h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-role-body {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-role-iface {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--rule);
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-soft);
}

.page-about .about-role-iface span {
  display: inline-block;
  margin-right: 8px;
  padding: 1px 7px;
  border: 1px solid var(--gold);
  border-radius: 2px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gold-deep);
}

/* ---------- 运营历程刻度 ---------- */
.page-about .about-timeline-figure {
  margin: 0 0 40px;
}

.page-about .about-axis-layout {
  display: grid;
  gap: 28px;
}

@media (min-width: 960px) {
  .page-about .about-axis-layout {
    grid-template-columns: var(--about-axis-w) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }
  .page-about .about-axis {
    position: sticky;
    top: 96px;
  }
}

.page-about .about-axis-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 10px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-axis-list li {
  flex: 0 0 auto;
  margin: 0;
}

.page-about .about-axis-link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--rule);
  background: var(--paper);
  color: var(--ink-soft);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 180ms var(--ease), color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-about .about-axis-year {
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-about .about-axis-tag {
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-about .about-axis-link:hover,
.page-about .about-axis-link:focus-visible {
  border-color: var(--gold);
  background: var(--cream);
  color: var(--cinnabar-deep);
}

.page-about .about-axis-link:hover .about-axis-year,
.page-about .about-axis-link:focus-visible .about-axis-year {
  color: var(--cinnabar-deep);
}

@media (min-width: 960px) {
  .page-about .about-axis-list {
    display: block;
    padding: 0;
    border-left: var(--about-ink-line);
    overflow: visible;
  }
  .page-about .about-axis-link {
    position: relative;
    display: block;
    padding: 12px 12px 12px 20px;
    border: 0;
    background: transparent;
  }
  .page-about .about-axis-link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 10px;
    height: 1px;
    background: var(--rule);
    transform: translateY(-50%);
    transition: width 180ms var(--ease), background-color 180ms var(--ease);
  }
  .page-about .about-axis-link:hover,
  .page-about .about-axis-link:focus-visible {
    background: transparent;
  }
  .page-about .about-axis-link:hover::before,
  .page-about .about-axis-link:focus-visible::before {
    width: 16px;
    background: var(--gold);
  }
  .page-about .about-axis-tag {
    display: block;
    margin-top: 2px;
  }
}

.page-about .about-node {
  position: relative;
  padding: 0 0 32px;
  border-bottom: var(--about-ink-line);
  scroll-margin-top: 120px;
}

.page-about .about-node + .about-node {
  padding-top: 32px;
}

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

.page-about .about-node-year {
  display: inline-block;
  margin: 0 0 12px;
  padding: 3px 12px;
  border: 1px solid var(--rule);
  font-family: var(--font-num);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
  transition: background-color 200ms var(--ease), color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .about-node:target .about-node-year {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  color: var(--paper);
}

.page-about .about-node h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .about-node p {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* ---------- 栏目运营规模 ---------- */
.page-about .about-scale-row {
  display: grid;
  gap: 1px;
  padding: 1px;
  background: var(--rule);
  border-top: 2px solid var(--cinnabar);
}

@media (min-width: 720px) {
  .page-about .about-scale-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .about-scale-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-scale-item {
  padding: 26px 22px 30px;
  background: var(--paper);
}

.page-about .about-scale-num {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(38px, 6vw, 56px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cinnabar);
  font-variant-numeric: tabular-nums;
}

.page-about .about-scale-unit {
  margin: 8px 0 14px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--gold-deep);
}

.page-about .about-scale-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 合作生态与对接方式 ---------- */
.page-about .about-partner-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin: 0 0 44px;
  padding: 0 0 26px;
  border-bottom: var(--about-ink-line);
}

.page-about .about-partner-stat {
  margin: 0;
}

.page-about .about-partner-stat dt {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}

.page-about .about-partner-stat dd {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 0;
  font-size: 15px;
  color: var(--ink);
}

.page-about .about-partner-stat dd .num {
  font-family: var(--font-num);
  font-size: clamp(32px, 5vw, 46px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cinnabar);
  font-variant-numeric: tabular-nums;
}

.page-about .about-steps {
  display: grid;
  gap: 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 720px) {
  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
  }
  .page-about .about-step:nth-child(even) {
    margin-top: 24px;
  }
}

.page-about .about-step {
  position: relative;
  padding-top: 22px;
  border-top: 1px solid var(--gold);
}

.page-about .about-step-no {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--gold-deep);
}

.page-about .about-step h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .about-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 版本演进 ---------- */
.page-about .about-shift-grid {
  display: grid;
  gap: 20px;
}

@media (min-width: 760px) {
  .page-about .about-shift-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px;
  }
}

.page-about .about-shift {
  padding: 26px 24px 28px;
  border: 1px solid var(--rule);
  background: var(--paper);
  transition: border-color 220ms var(--ease);
}

.page-about .about-shift:hover {
  border-color: var(--gold);
}

.page-about .about-shift-label {
  margin: 0 0 18px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}

.page-about .about-shift-pair {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 0 0 18px;
}

.page-about .about-shift-before {
  font-family: var(--font-num);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--ink-soft);
  text-decoration: line-through;
  text-decoration-color: var(--rule);
  text-decoration-thickness: 1px;
  font-variant-numeric: tabular-nums;
}

.page-about .about-shift-after {
  font-family: var(--font-num);
  font-size: 46px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cinnabar);
  font-variant-numeric: tabular-nums;
}

.page-about .about-shift-arrow {
  display: block;
  flex: 0 0 auto;
  width: 44px;
  height: 1px;
  background: var(--gold);
  position: relative;
}

.page-about .about-shift-arrow::after {
  content: "";
  position: absolute;
  right: 0;
  top: -3px;
  width: 7px;
  height: 7px;
  border-top: 1px solid var(--gold);
  border-right: 1px solid var(--gold);
  transform: rotate(45deg);
}

.page-about .about-shift-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-extra {
  display: grid;
  gap: 14px;
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 760px) {
  .page-about .about-extra {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }
}

.page-about .about-extra li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-extra li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 1px;
  background: var(--cinnabar);
}

/* ---------- 内容审核 ---------- */
.page-about .about-audit {
  display: grid;
  gap: 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 760px) {
  .page-about .about-audit {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
  }
}

.page-about .about-audit-step {
  position: relative;
  padding: 20px 0 0;
  border-top: var(--about-ink-line);
}

.page-about .about-audit-step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 42px;
  height: 2px;
  background: var(--cinnabar);
}

.page-about .about-audit-no {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--gold-deep);
}

.page-about .about-audit-step h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .about-audit-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-audit-meta {
  margin: 36px 0 0;
  padding-top: 24px;
  border-top: var(--about-ink-line);
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-audit-figure {
  font-family: var(--font-num);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--jade);
  font-variant-numeric: tabular-nums;
}

/* ---------- 收尾 ---------- */
.page-about .about-outro-grid {
  display: grid;
  gap: 28px;
}

@media (min-width: 880px) {
  .page-about .about-outro-grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    gap: 48px;
    align-items: end;
  }
}

.page-about .about-outro .eyebrow {
  margin: 0 0 10px;
}

.page-about .about-outro h2 {
  margin: 0 0 16px;
}

.page-about .about-outro-text {
  margin: 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

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

.page-about .about-region {
  margin: 48px 0 0;
}

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

/* ---------- 无障碍与动效降级 ---------- */
.page-about .about-role,
.page-about .about-axis-link,
.page-about .about-node-year,
.page-about .about-shift {
  transition-property: transform, border-color, box-shadow, background-color, color, opacity;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-axis-link,
  .page-about .about-node-year,
  .page-about .about-shift,
  .page-about .about-axis-link::before {
    transition: none;
  }
  .page-about .about-role:hover,
  .page-about .about-role:focus-within {
    transform: none;
  }
}