/* ============================================
   品牌档案页 /company/
   作用域：.page-about
   ============================================ */

.page-about {
  --about-rule: var(--line-faint);
  --about-ink: var(--ink-900);
  --about-panel: var(--ink-800);
}

.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */

.page-about .breadcrumb {
  margin-top: 28px;
}

.page-about .about-hero {
  padding-bottom: 56px;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 40px;
  margin-top: 30px;
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  font-size: clamp(2rem, 5.6vw, 3.5rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 900;
  max-width: 18ch;
}

.page-about .about-hero__lead {
  margin: 22px 0 0;
  max-width: 62ch;
  color: var(--text-2);
  line-height: 1.9;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 34px 0 0;
  padding: 0;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

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

.page-about .about-fact__label {
  margin: 0;
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: var(--text-3);
}

.page-about .about-fact__num {
  margin: 8px 0 0;
  font-size: 1.75rem;
  line-height: 1;
  font-weight: 700;
  color: var(--signal);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__figure {
  margin: 0;
}

/* ---------- 品牌主张 ---------- */

.page-about .about-claim {
  padding: 64px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-claim__cols {
  display: grid;
  gap: 30px;
  margin-top: 34px;
}

.page-about .claim {
  border-top: 1px solid var(--line-soft);
  padding-top: 18px;
}

.page-about .claim__k {
  margin: 0;
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: var(--signal);
}

.page-about .claim__t {
  margin: 12px 0 10px;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
}

.page-about .claim__d {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--text-2);
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline {
  padding: 68px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .years {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  margin-bottom: 34px;
  padding-bottom: 6px;
  -webkit-overflow-scrolling: touch;
}

.page-about .years__tick {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 0 0 auto;
  padding: 8px 12px 10px;
  border-bottom: 2px solid var(--about-rule);
  color: var(--text-3);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .years__tick:hover,
.page-about .years__tick:focus-visible {
  color: var(--text);
  border-bottom-color: var(--signal);
}

.page-about .years__num {
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
}

.page-about .years__cap {
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--text-3);
}

.page-about .years__entries {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 28px;
}

.page-about .years__entries::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: var(--about-rule);
}

.page-about .years__entry {
  position: relative;
  padding-bottom: 44px;
}

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

.page-about .years__entry::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 7px;
  width: 9px;
  height: 9px;
  background: var(--about-ink);
  border: 2px solid var(--signal);
  transform: rotate(45deg);
  transition: background var(--dur) var(--ease);
}

.page-about .years__entry-year {
  margin: 0 0 6px;
  font-size: 0.8125rem;
  letter-spacing: 0.18em;
  color: var(--signal);
  font-variant-numeric: tabular-nums;
}

.page-about .years__entry h3 {
  margin: 0 0 8px;
  font-size: 1.125rem;
  line-height: 1.45;
  font-weight: 700;
}

.page-about .years__entry p {
  margin: 0;
  max-width: 62ch;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--text-2);
}

/* 年份锚点被激活时，同步点亮左轨刻度 */
.page-about:has(#year-2019:target) .years__tick[href="#year-2019"],
.page-about:has(#year-2021:target) .years__tick[href="#year-2021"],
.page-about:has(#year-2023:target) .years__tick[href="#year-2023"],
.page-about:has(#year-2024:target) .years__tick[href="#year-2024"],
.page-about:has(#year-2025:target) .years__tick[href="#year-2025"] {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.page-about .years__entry {
  scroll-margin-top: 96px;
}

/* ---------- 索引结构 ---------- */

.page-about .about-index {
  padding: 68px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .axis {
  display: grid;
  gap: 1px;
  margin-top: 34px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .axis__layer {
  background: var(--about-panel);
  padding: 24px 22px 24px;
  box-shadow: inset 0 2px 0 0 var(--signal);
}

.page-about .axis__no {
  margin: 0;
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: var(--signal);
}

.page-about .axis__layer h3 {
  margin: 12px 0 10px;
  font-size: 1.125rem;
  line-height: 1.4;
  font-weight: 700;
}

.page-about .axis__layer p {
  margin: 0 0 14px;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--text-2);
}

.page-about .axis__use {
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--about-rule);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--text-3);
}

/* 版本对照表 */

.page-about .vtable-scroll {
  margin-top: 40px;
  border: 1px solid var(--about-rule);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .vtable {
  width: 100%;
  min-width: 540px;
  border-collapse: collapse;
}

.page-about .vtable th,
.page-about .vtable td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  font-size: 0.9375rem;
  line-height: 1.7;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .vtable thead th {
  background: var(--ink-700);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--text-2);
}

.page-about .vtable tbody th {
  width: 22%;
  background: var(--about-panel);
  font-weight: 500;
  color: var(--text-2);
  white-space: nowrap;
}

.page-about .vtable tbody td {
  color: var(--text);
}

.page-about .vtable tbody tr:last-child th,
.page-about .vtable tbody tr:last-child td {
  border-bottom: 0;
}

/* ---------- 数据来源 ---------- */

.page-about .about-source {
  padding: 68px 0;
  background: var(--indigo);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-source__grid {
  display: grid;
  gap: 40px;
}

.page-about .about-source .lead {
  color: var(--text-2);
  max-width: 58ch;
}

.page-about .flow {
  list-style: none;
  counter-reset: flow;
  margin: 30px 0 0;
  padding: 0;
}

.page-about .flow li {
  counter-increment: flow;
  position: relative;
  padding: 16px 0 16px 48px;
  border-top: 1px solid rgba(230, 237, 236, 0.14);
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--text-2);
}

.page-about .flow li:last-child {
  border-bottom: 1px solid rgba(230, 237, 236, 0.14);
}

.page-about .flow li::before {
  content: counter(flow, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 18px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--signal);
}

.page-about .about-source__figure {
  margin: 0;
}

/* ---------- 团队构成 ---------- */

.page-about .about-team {
  padding: 68px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .team__grid {
  display: grid;
  gap: 40px;
}

.page-about .bars {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-about .bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "label value"
    "track track";
  gap: 8px 14px;
  align-items: baseline;
}

.page-about .bar__label {
  grid-area: label;
  font-size: 0.9375rem;
  color: var(--text);
}

.page-about .bar__value {
  grid-area: value;
  font-size: 1rem;
  color: var(--signal);
  font-variant-numeric: tabular-nums;
}

.page-about .bar__track {
  grid-area: track;
  display: block;
  position: relative;
  height: 8px;
  background: var(--ink-700);
  overflow: hidden;
}

.page-about .bar__track::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--w, 0%);
  background: var(--bar-color, var(--signal));
}

.page-about .team__note {
  margin: 26px 0 0;
  max-width: 60ch;
  font-size: 0.875rem;
  line-height: 1.85;
  color: var(--text-3);
}

.page-about .about-team__figure {
  margin: 0;
}

/* ---------- 覆盖与协作 ---------- */

.page-about .about-reach {
  padding: 68px 0;
  background: var(--about-panel);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .reach {
  display: grid;
  gap: 1px;
  margin-top: 34px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .reach__item {
  background: var(--about-ink);
  padding: 24px 22px 26px;
}

.page-about .reach__num {
  margin: 0;
  font-size: 2.25rem;
  line-height: 1;
  font-weight: 700;
  color: var(--signal);
  font-variant-numeric: tabular-nums;
}

.page-about .reach__text {
  margin: 12px 0 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--text-2);
}

.page-about .reach__coop {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--about-rule);
}

.page-about .reach__coop h3 {
  margin: 0 0 6px;
  font-size: 1.125rem;
  font-weight: 700;
}

.page-about .reach__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .reach__list li {
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--text-2);
}

.page-about .reach__no {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--signal);
  padding-top: 4px;
}

/* ---------- 服务承诺 ---------- */

.page-about .about-promise {
  padding: 68px 0 88px;
  background: var(--wine);
}

.page-about .promise {
  display: grid;
  gap: 1px;
  margin-top: 34px;
  background: rgba(230, 237, 236, 0.16);
  border: 1px solid rgba(230, 237, 236, 0.16);
}

.page-about .promise__card {
  background: var(--wine);
  padding: 26px 24px 30px;
}

.page-about .promise__k {
  margin: 0;
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: var(--signal);
}

.page-about .promise__v {
  margin: 14px 0 12px;
  font-size: clamp(1.25rem, 3vw, 1.625rem);
  font-weight: 800;
  line-height: 1.3;
  color: var(--text);
}

.page-about .promise__d {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--text-2);
  max-width: 52ch;
}

.page-about .about-promise__links {
  margin: 40px 0 0;
  max-width: 68ch;
  font-size: 0.9375rem;
  line-height: 2;
  color: var(--text-2);
}

.page-about .about-promise__links a {
  color: var(--signal);
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 240, 220, 0.4);
  padding-bottom: 1px;
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-promise__links a:hover,
.page-about .about-promise__links a:focus-visible {
  border-bottom-color: var(--signal);
}

/* ============================================
   窄屏 → 宽屏
   ============================================ */

@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .promise {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-claim__cols {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 42px;
  }

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

  .page-about .about-hero {
    padding-bottom: 72px;
  }

  .page-about .about-claim,
  .page-about .about-timeline,
  .page-about .about-index,
  .page-about .about-source,
  .page-about .about-team,
  .page-about .about-reach {
    padding-top: 92px;
    padding-bottom: 92px;
  }

  .page-about .about-promise {
    padding-top: 92px;
    padding-bottom: 108px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    gap: 56px;
    align-items: end;
  }

  .page-about .about-source__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 56px;
    align-items: center;
  }

  .page-about .team__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-about .about-timeline__layout {
    display: grid;
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .years {
    position: sticky;
    top: calc(var(--topbar-h) + 28px);
    flex-direction: column;
    gap: 0;
    overflow: visible;
    margin-bottom: 0;
    padding-bottom: 0;
    border-left: 1px solid var(--about-rule);
  }

  .page-about .years__tick {
    padding: 12px 0 12px 20px;
    border-bottom: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
  }

  .page-about .years__tick:hover,
  .page-about .years__tick:focus-visible {
    border-bottom-color: transparent;
    border-left-color: var(--signal);
  }

  .page-about:has(#year-2019:target) .years__tick[href="#year-2019"],
  .page-about:has(#year-2021:target) .years__tick[href="#year-2021"],
  .page-about:has(#year-2023:target) .years__tick[href="#year-2023"],
  .page-about:has(#year-2024:target) .years__tick[href="#year-2024"],
  .page-about:has(#year-2025:target) .years__tick[href="#year-2025"] {
    border-bottom-color: transparent;
    border-left-color: var(--signal);
  }

  .page-about .years__entries {
    padding-left: 40px;
  }

  .page-about .years__entry::before {
    left: -46px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__title {
    font-size: clamp(2.6rem, 4.4vw, 3.9rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .years__tick,
  .page-about .years__entry::before,
  .page-about .about-promise__links a {
    transition: none;
  }
}

.page-about {
  --bar-color: transparent;
  --w: 1rem;
}