/* ===== 品牌历程 · 页面专属样式 ===== */
.page-about {
  --ab-soft: rgba(243, 237, 224, .78);
  --ab-line-x: 60px;
  padding-bottom: 64px;
  overflow-x: clip;
}

@media (min-width: 860px) {
  .page-about {
    --ab-line-x: 104px;
    padding-bottom: 110px;
  }
}

/* ---------- 首屏：窄注释栏 + 宽主栏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: 28px;
  padding-top: 28px;
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(170px, 3fr) minmax(0, 8fr);
    gap: 56px;
    align-items: start;
    padding-top: 64px;
  }
}

.page-about .about-hero__aside {
  border-top: 2px solid var(--gold);
  padding-top: 14px;
}

@media (min-width: 900px) {
  .page-about .about-hero__aside {
    border-top: 0;
    border-left: 2px solid var(--gold);
    padding: 2px 0 0 18px;
    margin-top: 10px;
  }
}

.page-about .about-hero__span {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-about .about-hero__note {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(32px, 6.6vw, 72px);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--cream);
  text-shadow: 0 0 22px rgba(201, 162, 39, .2);
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ab-soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 34px 0 0;
  background: var(--hair);
  border: 1px solid var(--hair);
  border-radius: 4px;
  overflow: hidden;
}

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

.page-about .about-hero__facts > div {
  background: var(--ink-0);
  padding: 14px 16px;
}

.page-about .about-hero__facts dt {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist);
}

.page-about .about-hero__facts dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--cream);
}

/* ---------- 区块公共头部 ---------- */
.page-about .about-sec {
  margin-top: clamp(64px, 9vw, 120px);
}

.page-about .about-sec__head {
  position: relative;
  display: grid;
  gap: 8px;
  margin-bottom: 34px;
  padding-top: 18px;
  border-top: 1px solid var(--hair-strong);
}

.page-about .about-sec__head::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 68px;
  height: 2px;
  background: var(--n, var(--gold));
}

.page-about .about-sec__head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(24px, 4.2vw, 38px);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--cream);
}

.page-about .about-sec__head p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

@media (min-width: 860px) {
  .page-about .about-sec__head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 330px);
    align-items: end;
    gap: 28px;
    margin-bottom: 48px;
  }

  .page-about .about-sec__head p {
    text-align: right;
  }
}

/* ---------- 时间轴 ---------- */
.page-about .about-tl {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: var(--ab-line-x);
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg,
      rgba(201, 162, 39, .95) 0%,
      rgba(192, 57, 43, .7) 34%,
      rgba(46, 125, 107, .6) 66%,
      rgba(111, 91, 214, .35) 100%);
}

.page-about .about-tl__item {
  position: relative;
  display: grid;
  grid-template-columns: var(--ab-line-x) minmax(0, 1fr);
  gap: 18px;
  padding-bottom: 46px;
}

@media (min-width: 860px) {
  .page-about .about-tl__item {
    gap: 40px;
    padding-bottom: 76px;
  }
}

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

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  top: 7px;
  left: calc(var(--ab-line-x) - 5px);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--n, var(--gold));
  box-shadow: 0 0 0 5px var(--ink-0);
  z-index: 1;
}

.page-about .about-tl__year {
  padding-top: 4px;
  padding-right: 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.3;
  letter-spacing: .04em;
  text-align: right;
  color: var(--n, var(--gold));
}

@media (min-width: 860px) {
  .page-about .about-tl__year {
    font-size: 21px;
    padding-right: 22px;
  }
}

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

@media (min-width: 860px) {
  .page-about .about-tl__body h3 {
    font-size: 22px;
  }
}

.page-about .about-tl__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ab-soft);
}

.page-about .about-tl__body .figure {
  margin-top: 22px;
}

/* ---------- 四条编号主线 ---------- */
.page-about .about-lines {
  display: grid;
  gap: 10px;
}

.page-about .about-lines .fold {
  background: var(--ink-1);
  border: 1px solid var(--hair);
  border-left: 4px solid var(--n, var(--gold));
  border-radius: 4px;
}

.page-about .about-lines .fold[data-open] {
  background: var(--ink-2);
  border-color: var(--n, var(--gold));
  box-shadow: var(--shadow);
}

.page-about .about-lines .fold__head {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 16px 18px;
  background: none;
  border: 0;
  color: var(--cream);
  font-family: inherit;
  font-size: 16px;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
  transition: background .3s var(--ease);
}

.page-about .about-lines .fold__head:hover {
  background: rgba(243, 237, 224, .05);
}

.page-about .about-lines .fold__head:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: -3px;
}

.page-about .about-lines .fold__title {
  flex: 1 1 auto;
  font-weight: 700;
}

.page-about .about-lines__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--n, var(--gold));
}

.page-about .about-lines .fold__panel p {
  margin: 0 18px 20px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ab-soft);
}

/* ---------- 团队与分工 ---------- */
.page-about .about-team {
  display: grid;
  gap: 28px;
}

@media (min-width: 1000px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: start;
  }
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 18px 0;
  border-top: 1px solid var(--hair);
}

.page-about .about-team__row:last-child {
  border-bottom: 1px solid var(--hair);
}

.page-about .about-team__idx {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.35;
  color: var(--n, var(--gold));
}

.page-about .about-team__row h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--cream);
}

.page-about .about-team__row p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ab-soft);
}

/* ---------- 地域与气质 ---------- */
.page-about .about-place {
  display: grid;
  gap: 26px;
}

@media (min-width: 940px) {
  .page-about .about-place {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 48px;
    align-items: center;
  }
}

.page-about .about-place__text p {
  margin: 0 0 16px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ab-soft);
}

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

/* ---------- 下一季 ---------- */
.page-about .about-next {
  display: grid;
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
  border-radius: 4px;
  overflow: hidden;
}

@media (min-width: 820px) {
  .page-about .about-next {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-next__item {
  background: var(--ink-0);
  border-top: 3px solid var(--n, var(--gold));
  padding: 22px 20px 26px;
}

.page-about .about-next__item h3 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--cream);
}

.page-about .about-next__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--ab-soft);
}

/* ---------- 收尾入口 ---------- */
.page-about .about-cta {
  position: relative;
  margin-top: 34px;
  padding: 34px 22px 30px;
  background: var(--ink-1);
  border: 1px solid var(--hair);
  border-radius: 6px;
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  left: -1px;
  right: -1px;
  top: -1px;
  height: 4px;
  border-radius: 6px 6px 0 0;
  background: linear-gradient(90deg,
      var(--gold) 0 25%,
      var(--red) 25% 50%,
      var(--jade) 50% 75%,
      var(--neon) 75% 100%);
}

.page-about .about-cta__lead {
  margin: 6px 0 22px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--cream);
}

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

/* ---------- 图片容器 ---------- */
.page-about .figure {
  margin: 0;
}

.page-about .figure__frame {
  border-radius: 4px;
  overflow: hidden;
}

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

.page-about .figure__cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 动效收敛 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-lines .fold__head {
    transition: none;
  }
}