/* ===== 品牌志 · 页面专属样式（作用域限定于 .page-about） ===== */

.page-about {
  --about-rule: rgba(110, 116, 128, .30);
  --about-measure: 36em;
}

/* ---------- 面包屑 ---------- */
.page-about .page-about__crumbs {
  padding-top: clamp(20px, 4vw, 36px);
}

/* ---------- 首屏 ---------- */
.page-about .page-about__hero {
  padding-top: clamp(18px, 3.5vw, 34px);
  padding-bottom: clamp(40px, 6vw, 70px);
}

.page-about .about-hero {
  display: grid;
  gap: clamp(30px, 5vw, 60px);
  align-items: start;
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: 1.35fr 1fr;
  }
}

.page-about .about-hero__intro .eyebrow {
  margin: 0 0 16px;
  color: var(--cyan);
  letter-spacing: .2em;
  font-size: var(--fs-12);
}

.page-about .about-hero h1 {
  margin: 0 0 22px;
  font-size: clamp(30px, 5.2vw, 52px);
  line-height: 1.15;
  letter-spacing: .03em;
  font-weight: 800;
  color: var(--paper);
  max-width: 16em;
}

.page-about .about-hero h1::after {
  content: "";
  display: block;
  width: 76px;
  height: 3px;
  margin-top: 22px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
}

.page-about .about-hero .lede {
  margin: 0;
  max-width: 34em;
  font-size: clamp(15px, 1vw + 12px, 18px);
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 30px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--about-rule);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
}

@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-hero__factv {
  display: block;
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1.1;
  letter-spacing: .02em;
  color: var(--paper);
}

.page-about .about-hero__factl {
  display: block;
  margin-top: 6px;
  font-size: var(--fs-12);
  letter-spacing: .05em;
  color: var(--text-dim);
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-l);
  border: 1px solid var(--about-rule);
  background:
    radial-gradient(120% 80% at 82% 0%, var(--glow-violet), transparent 62%),
    radial-gradient(90% 70% at 0% 100%, var(--glow-cyan), transparent 60%),
    var(--ink-900);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  opacity: .92;
}

.page-about .about-hero__media .media-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 38px 18px 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .04em;
  color: var(--text-soft);
  background: linear-gradient(to top, rgba(5, 7, 15, .92), rgba(5, 7, 15, 0));
}

/* ---------- 正文骨架：主栏 + 章节索引列 ---------- */
.page-about .about-body {
  display: grid;
  gap: 36px;
  padding-bottom: clamp(50px, 8vw, 96px);
}

@media (max-width: 1079px) {
  .page-about .about-body__main { order: 2; }
  .page-about .about-index { order: 1; }
}

@media (min-width: 1080px) {
  .page-about .about-body {
    grid-template-columns: minmax(0, 1fr) 172px;
    gap: 72px;
    align-items: start;
  }
}

.page-about .about-index__title {
  margin: 0 0 12px;
  font-size: var(--fs-12);
  letter-spacing: .22em;
  color: var(--text-dim);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-index__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-index__link {
  display: block;
  white-space: nowrap;
  padding: 7px 13px;
  border: 1px solid var(--about-rule);
  border-radius: var(--radius-pill);
  font-size: var(--fs-12);
  letter-spacing: .04em;
  color: var(--text-soft);
  text-decoration: none;
  transition: color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              background-color var(--dur) var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--paper);
  border-color: rgba(34, 211, 238, .6);
  background: rgba(34, 211, 238, .08);
}

@media (min-width: 1080px) {
  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-about .about-index__list {
    display: block;
    overflow: visible;
    border-left: 1px solid var(--about-rule);
  }

  .page-about .about-index__link {
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    margin-left: -1px;
    padding: 9px 0 9px 14px;
    white-space: normal;
    line-height: 1.5;
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    background: transparent;
    border-left-color: var(--cyan);
    color: var(--paper);
  }
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding-top: clamp(44px, 7vw, 76px);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-section .index-rule {
  margin-bottom: 16px;
}

.page-about .about-section .section-title {
  margin: 0 0 20px;
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.32;
  letter-spacing: .025em;
  color: var(--paper);
}

.page-about .about-copy {
  max-width: var(--about-measure);
}

.page-about .about-copy p {
  margin: 0 0 1.15em;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .about-copy p:last-child {
  margin-bottom: 0;
}

.page-about .about-para--drop::first-letter {
  float: left;
  margin: .1em .14em 0 0;
  font-family: var(--font-serif);
  font-size: 3.1em;
  line-height: .88;
  color: var(--clay);
}

/* ---------- 时间线 ---------- */
.page-about .timeline {
  list-style: none;
  position: relative;
  margin: 34px 0 0;
  padding: 0 0 0 30px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(to bottom,
      var(--clay) 0%,
      rgba(185, 112, 79, .38) 46%,
      var(--about-rule) 100%);
}

.page-about .timeline__item {
  position: relative;
  padding-bottom: 32px;
}

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

.page-about .timeline__node {
  position: absolute;
  left: -30px;
  top: 5px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--ink-800);
  border: 2px solid var(--clay);
  transition: background-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}

.page-about .timeline__item:hover .timeline__node,
.page-about .timeline__item:focus-within .timeline__node {
  background: var(--clay);
  box-shadow: 0 0 0 6px rgba(185, 112, 79, .18);
}

.page-about .timeline__body {
  transition: transform var(--dur) var(--ease);
}

.page-about .timeline__item:hover .timeline__body {
  transform: translateX(3px);
}

.page-about .timeline__stage {
  display: inline-block;
  margin: 0 0 10px;
  padding: 3px 11px;
  border: 1px solid rgba(185, 112, 79, .42);
  border-radius: var(--radius-pill);
  font-size: var(--fs-12);
  letter-spacing: .14em;
  color: var(--clay);
}

.page-about .timeline__title {
  margin: 0 0 9px;
  font-size: clamp(17px, 1.4vw + 13px, 22px);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: .025em;
  color: var(--paper);
}

.page-about .timeline__text {
  margin: 0 0 12px;
  max-width: 34em;
  font-size: var(--fs-16);
  line-height: 1.82;
  color: var(--text-soft);
}

.page-about .timeline__note {
  margin: 0;
  max-width: 34em;
  padding: 10px 14px;
  border-left: 2px solid var(--moss);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  background: rgba(124, 154, 114, .07);
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 四件长期做的事 ---------- */
.page-about .four-list {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
}

.page-about .four-list__item {
  display: grid;
  gap: 10px;
  padding: 24px 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .four-list__item:last-child {
  border-bottom: 1px solid var(--about-rule);
}

@media (min-width: 760px) {
  .page-about .four-list__item {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 26px;
    padding: 26px 0;
  }
}

.page-about .four-list__num {
  margin: 0;
  padding-top: 4px;
  font-size: var(--fs-14);
  letter-spacing: .14em;
  color: var(--stone);
  transition: color var(--dur) var(--ease);
}

.page-about .four-list__item:hover .four-list__num {
  color: var(--cyan);
}

.page-about .four-list__title {
  margin: 0 0 8px;
  font-size: var(--fs-18);
  font-weight: 700;
  letter-spacing: .02em;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .four-list__text {
  margin: 0 0 10px;
  max-width: 36em;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .four-list__for {
  margin: 0;
  font-size: var(--fs-12);
  letter-spacing: .05em;
  color: var(--moss);
}

/* ---------- 图片区块 ---------- */
.page-about .about-figure {
  margin: 34px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-m);
  border: 1px solid var(--about-rule);
}

.page-about .about-figure .media-caption {
  margin-top: 10px;
  font-size: var(--fs-12);
  letter-spacing: .04em;
  color: var(--text-dim);
}

/* ---------- 团队分工 ---------- */
.page-about .team-roles {
  margin: 28px 0 0;
  max-width: 40em;
  border-top: 1px solid var(--about-rule);
}

.page-about .team-roles__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  padding: 13px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .team-roles dt {
  font-size: var(--fs-14);
  letter-spacing: .03em;
  line-height: 1.6;
  color: var(--text-soft);
}

.page-about .team-roles dd {
  margin: 0;
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: .04em;
  color: var(--paper);
}

/* ---------- 数据块 ---------- */
.page-about .stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 30px 0 0;
  border: 1px solid var(--about-rule);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--about-rule);
}

@media (min-width: 760px) {
  .page-about .stat-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .stat-grid .stat {
  padding: 22px 20px;
  border: 0;
  border-radius: 0;
  background:
    linear-gradient(160deg, rgba(139, 92, 246, .10), transparent 62%),
    var(--ink-700);
}

/* ---------- 运营与联系 ---------- */
.page-about .origin-card {
  display: grid;
  gap: 22px;
  margin-top: 28px;
  padding: clamp(22px, 3.4vw, 34px);
  border: 1px solid var(--about-rule);
  border-radius: var(--radius-m);
  background:
    linear-gradient(150deg, rgba(139, 92, 246, .12), transparent 58%),
    var(--ink-700);
}

@media (min-width: 820px) {
  .page-about .origin-card {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 40px;
  }
}

.page-about .origin-card__label {
  margin: 0 0 8px;
  font-size: var(--fs-12);
  letter-spacing: .16em;
  color: var(--stone);
}

.page-about .origin-card__value {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.7;
  color: var(--paper);
  word-break: break-word;
}

.page-about .origin-card__value a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, .35);
}

.page-about .origin-card__value a:hover,
.page-about .origin-card__value a:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-about .origin-note {
  margin: 18px 0 0;
  max-width: 40em;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 更新排期 ---------- */
.page-about .update-list {
  list-style: none;
  display: grid;
  gap: 12px;
  margin: 30px 0 0;
  padding: 0;
}

.page-about .update-list__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 16px 18px;
  border: 1px solid var(--about-rule);
  border-radius: var(--radius-s);
  background: rgba(19, 28, 69, .55);
  transition: border-color var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}

.page-about .update-list__item:hover {
  border-color: rgba(34, 211, 238, .42);
  transform: translateY(-2px);
}

.page-about .update-list__tick {
  padding-top: 3px;
  font-size: var(--fs-12);
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .update-list__text {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.78;
  color: var(--text-soft);
}

/* ---------- 延伸入口 ---------- */
.page-about .about-next {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px solid var(--about-rule);
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 560px) {
  .page-about .timeline {
    padding-left: 24px;
  }

  .page-about .timeline::before {
    left: 5px;
  }

  .page-about .timeline__node {
    left: -24px;
    width: 11px;
    height: 11px;
  }

  .page-about .about-hero h1::after {
    margin-top: 18px;
  }

  .page-about .about-figure,
  .page-about .stat-grid,
  .page-about .origin-card,
  .page-about .update-list {
    margin-top: 24px;
  }
}

/* ---------- 减少动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .timeline__body,
  .page-about .timeline__node,
  .page-about .four-list__num,
  .page-about .update-list__item,
  .page-about .about-index__link {
    transition: none;
  }

  .page-about .timeline__item:hover .timeline__body {
    transform: none;
  }

  .page-about .update-list__item:hover {
    transform: none;
  }
}