/* ================= 品牌档案页 · page-about ================= */

.page-about {
  --pa-col: clamp(150px, 24%, 240px);
  --pa-cyan-a: rgba(69, 224, 230, 0.12);
  --pa-amber-a: rgba(243, 177, 74, 0.12);
  --pa-ink: #141A3E;
  --pa-ink-soft: #57513F;
  --pa-rule: rgba(20, 26, 62, 0.16);
  --pa-amber-deep: #A06A12;
  padding-block: clamp(20px, 4vw, 44px) clamp(48px, 8vw, 104px);
  padding-inline: clamp(16px, 4vw, 28px);
}

.page-about .og-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.page-about a:focus-visible,
.page-about button:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 面包屑 ---------- */
.page-about__crumbs {
  margin-bottom: clamp(20px, 3vw, 32px);
}

/* ---------- 首屏 ---------- */
.page-about__hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  padding-bottom: clamp(32px, 5vw, 64px);
  border-bottom: 1px solid var(--hair);
}

@media (min-width: 960px) {
  .page-about__hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }
}

.page-about__eyebrow {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 18px;
  font-size: var(--fs-12);
  letter-spacing: 0.24em;
  color: var(--muted);
}

.page-about__eyebrow::after {
  content: "";
  flex: 1 1 auto;
  height: 1px;
  background: linear-gradient(90deg, var(--hair), transparent);
}

.page-about__title {
  margin: 0 0 20px;
  font-size: var(--fs-40);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: 0.012em;
  color: var(--ivory);
  max-width: 20ch;
}

@media (min-width: 960px) {
  .page-about__title {
    font-size: var(--fs-56);
  }
}

.page-about__lede {
  margin: 0 0 28px;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--muted);
  max-width: 34em;
}

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

.page-about__hero-media {
  margin: 0;
  border: 1px solid var(--hair);
  background: var(--ink-2);
  overflow: hidden;
}

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

/* ---------- 档案栅格：左年份 / 右叙事 ---------- */
.page-about__archive {
  margin-top: clamp(40px, 6vw, 72px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

@media (min-width: 960px) {
  .page-about__archive {
    grid-template-columns: minmax(150px, 24%) minmax(0, 1fr);
    column-gap: clamp(28px, 5vw, 72px);
    align-items: start;
  }
  .page-about__ticker {
    position: sticky;
    top: 108px;
  }
}

.page-about__ticker-label {
  margin: 0 0 14px;
  font-size: var(--fs-12);
  letter-spacing: 0.3em;
  color: var(--muted);
}

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

.page-about__years::-webkit-scrollbar {
  display: none;
}

@media (min-width: 960px) {
  .page-about__years {
    flex-direction: column;
    gap: 0;
    overflow-x: visible;
  }
}

.page-about__year {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--muted);
  border-left: 2px solid var(--hair);
  background: transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about__year .og-num {
  font-size: var(--fs-16);
  font-weight: 700;
  color: inherit;
}

.page-about__year-tag {
  font-size: var(--fs-12);
  color: var(--muted);
  letter-spacing: 0.06em;
}

@media (max-width: 959px) {
  .page-about__year-tag {
    display: none;
  }
}

.page-about__year:hover {
  color: var(--ivory);
  border-left-color: var(--cyan);
  background: var(--pa-cyan-a);
}

.page-about__year[data-active="true"] {
  color: var(--amber);
  border-left-color: var(--amber);
  background: linear-gradient(90deg, var(--pa-amber-a), transparent 78%);
}

.page-about__year[data-active="true"] .page-about__year-tag {
  color: var(--ivory);
}

/* ---------- 右侧叙事流 ---------- */
.page-about__stream {
  display: grid;
  gap: clamp(48px, 7vw, 96px);
  min-width: 0;
}

.page-about__section {
  scroll-margin-top: 128px;
}

.page-about__section .og-section__title {
  letter-spacing: 0.012em;
}

/* ---------- 通用图表容器 ---------- */
.page-about__figure {
  margin: 26px 0 0;
  border: 1px solid var(--hair);
  background: var(--ink-2);
}

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

.page-about__figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--hair);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 01 年份时间线 ---------- */
.page-about__timeline {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--hair);
}

.page-about__node {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 22px 0 22px 20px;
  border-bottom: 1px solid var(--hair);
  scroll-margin-top: 132px;
  transition: background-color 0.2s var(--ease);
}

.page-about__node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 30px;
  width: 6px;
  height: 6px;
  background: var(--hair);
  transition: background-color 0.2s var(--ease);
}

.page-about__node:hover {
  background: linear-gradient(90deg, rgba(69, 224, 230, 0.06), transparent 70%);
}

.page-about__node:hover::before {
  background: var(--cyan);
}

@media (min-width: 720px) {
  .page-about__node {
    grid-template-columns: 110px minmax(0, 1fr);
    column-gap: 28px;
  }
}

.page-about__node-year {
  font-size: var(--fs-20);
  font-weight: 800;
  line-height: 1.2;
  color: var(--amber);
}

.page-about__node-body h3 {
  margin: 0 0 6px;
  font-size: var(--fs-16);
  font-weight: 700;
  line-height: 1.5;
  color: var(--ivory);
}

@media (min-width: 720px) {
  .page-about__node-body h3 {
    font-size: var(--fs-20);
  }
}

.page-about__node-body p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--muted);
  max-width: 40em;
}

/* ---------- 02 团队分工 ---------- */
.page-about__crew {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-about__crew-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 22px 20px;
  background: var(--ink-2);
  box-shadow: inset 3px 0 0 var(--hair);
}

.page-about__crew-row--editors {
  box-shadow: inset 3px 0 0 var(--cyan);
}

.page-about__crew-row--engineers {
  box-shadow: inset 3px 0 0 var(--amber);
}

.page-about__crew-row--support {
  box-shadow: inset 3px 0 0 var(--coral);
}

@media (min-width: 780px) {
  .page-about__crew-row {
    grid-template-columns: 76px minmax(120px, 170px) minmax(0, 1fr);
    column-gap: 24px;
    align-items: start;
  }
}

.page-about__crew-count {
  font-size: var(--fs-28);
  font-weight: 800;
  line-height: 1;
  color: var(--ivory);
}

.page-about__crew-row--editors .page-about__crew-count {
  color: var(--cyan);
}

.page-about__crew-row--engineers .page-about__crew-count {
  color: var(--amber);
}

.page-about__crew-row--support .page-about__crew-count {
  color: var(--coral);
}

.page-about__crew-name {
  margin: 0;
  font-size: var(--fs-16);
  font-weight: 700;
  line-height: 1.6;
  color: var(--ivory);
}

.page-about__crew-text {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--muted);
  max-width: 40em;
}

.page-about__crew-hand {
  grid-column: 1 / -1;
  margin: 6px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--hair);
  font-size: var(--fs-12);
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- 03 内容标准（暖纸区） ---------- */
.page-about .og-paper.page-about__paper {
  margin-top: 26px;
  padding: clamp(22px, 4vw, 40px);
  background: var(--paper);
  color: var(--pa-ink);
  border: 1px solid var(--paper-2);
}

.page-about__std {
  list-style: none;
  counter-reset: std;
  margin: 0;
  padding: 0;
}

.page-about__std-item {
  counter-increment: std;
  position: relative;
  padding: 18px 0 18px 46px;
  border-bottom: 1px solid var(--pa-rule);
}

.page-about__std-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about__std-item::before {
  content: counter(std, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 20px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
  color: var(--pa-amber-deep);
}

.page-about__std-item h3 {
  margin: 0 0 6px;
  font-size: var(--fs-16);
  font-weight: 700;
  line-height: 1.6;
  color: var(--pa-ink);
}

.page-about__std-item p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--pa-ink-soft);
  max-width: 42em;
}

/* ---------- 04 更新节奏 ---------- */
.page-about__cadence {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

@media (min-width: 780px) {
  .page-about__cadence {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

.page-about__cadence-item {
  position: relative;
  padding: 24px 20px 28px;
  background: var(--ink-2);
  border: 1px solid var(--hair);
  overflow: hidden;
}

.page-about__cadence-item::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), transparent);
}

.page-about__cadence-item:nth-child(2)::after {
  background: linear-gradient(90deg, var(--amber), transparent);
}

.page-about__cadence-item:nth-child(3)::after {
  background: linear-gradient(90deg, var(--coral), transparent);
}

.page-about__cadence-num {
  display: block;
  margin-bottom: 10px;
  font-size: var(--fs-28);
  font-weight: 800;
  line-height: 1.1;
  color: var(--ivory);
}

.page-about__cadence-title {
  margin: 0 0 8px;
  font-size: var(--fs-16);
  font-weight: 700;
  line-height: 1.6;
  color: var(--ivory);
}

.page-about__cadence-text {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 05 覆盖与规模 ---------- */
.page-about__stats {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}

@media (min-width: 780px) {
  .page-about__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about__stat {
  padding: 22px 18px 24px;
  background: var(--ink);
}

.page-about__stat-num {
  display: block;
  font-size: var(--fs-28);
  font-weight: 800;
  line-height: 1.1;
  color: var(--amber);
}

.page-about__stat-label {
  display: block;
  margin-top: 8px;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 06 坚持的做法 ---------- */
.page-about__pledge {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

@media (min-width: 780px) {
  .page-about__pledge {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
}

.page-about__pledge-item {
  padding-top: 18px;
  border-top: 2px solid var(--hair);
}

.page-about__pledge-item:nth-child(1) {
  border-top-color: var(--cyan);
}

.page-about__pledge-item:nth-child(2) {
  border-top-color: var(--amber);
}

.page-about__pledge-item:nth-child(3) {
  border-top-color: var(--coral);
}

.page-about__pledge-item h3 {
  margin: 0 0 8px;
  font-size: var(--fs-16);
  font-weight: 700;
  line-height: 1.6;
  color: var(--ivory);
}

.page-about__pledge-item p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 出口 ---------- */
.page-about__outro {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--hair);
  background:
    linear-gradient(135deg, rgba(69, 224, 230, 0.10), rgba(243, 177, 74, 0.08) 58%, transparent 100%),
    var(--ink-2);
}

@media (min-width: 780px) {
  .page-about__outro {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    column-gap: 32px;
  }
}

.page-about__outro-title {
  margin: 0 0 10px;
  font-size: var(--fs-28);
  font-weight: 800;
  line-height: 1.3;
  color: var(--ivory);
}

.page-about__outro-text {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--muted);
  max-width: 42em;
}

.page-about__outro-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about__outro-links a {
  display: inline-block;
  padding: 10px 16px;
  border: 1px solid var(--hair);
  background: rgba(10, 15, 44, 0.4);
  color: var(--ivory);
  font-size: var(--fs-14);
  text-decoration: none;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about__outro-links a:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--pa-cyan-a);
}

/* ---------- 动效尊重偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about__year,
  .page-about__node,
  .page-about__node::before,
  .page-about__outro-links a {
    transition: none;
  }
}