/* =========================================================
   品牌总览  /overview/
   杂志特稿式版面：长栏正文 + 旁注时间线 + 斜切数据带
   ========================================================= */

.page-about {
  --ab-measure: 40ch;
  background: var(--sand);
  color: var(--ink);
}

/* ---------- 面包屑 ---------- */
.page-about .ab-crumb {
  padding-top: var(--sp-3);
}

.page-about .ab-crumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--mist-deep);
}

.page-about .ab-crumb li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--mist);
}

.page-about .ab-crumb a {
  color: var(--tide);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .2s var(--ease);
}

.page-about .ab-crumb a:hover,
.page-about .ab-crumb a:focus-visible {
  border-bottom-color: currentColor;
}

.page-about .ab-crumb [aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: var(--sp-4) 0 var(--sp-6);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: -80px -40px auto 25%;
  height: 420px;
  background: radial-gradient(58% 66% at 74% 10%, rgba(63, 210, 199, .22), transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.page-about .ab-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--sp-5);
}

.page-about .ab-hero__lead h1 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 34px;
  line-height: 1.22;
  letter-spacing: -.01em;
  margin: var(--sp-2) 0 var(--sp-3);
  color: var(--deep);
}

.page-about .ab-hero__lead .lede {
  max-width: var(--ab-measure);
  font-size: 17px;
  line-height: 1.85;
  color: #2a4b54;
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}

/* 首屏概况卡 */
.page-about .ab-facts {
  position: relative;
  overflow: hidden;
  padding: var(--sp-4) var(--sp-3) var(--sp-4);
  border-radius: var(--r-lg);
  background: linear-gradient(158deg, var(--deep-2) 0%, var(--deep) 48%, #0a5057 100%);
  color: var(--sand);
  box-shadow: var(--shadow-lift);
}

.page-about .ab-facts::after {
  content: "";
  position: absolute;
  inset: auto -34% -58% 14%;
  height: 200px;
  background: radial-gradient(closest-side, rgba(63, 210, 199, .45), transparent 72%);
  pointer-events: none;
}

.page-about .ab-facts__title {
  position: relative;
  margin: 0;
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(251, 246, 236, .62);
}

.page-about .ab-facts__list {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-3) var(--sp-2);
  margin: var(--sp-3) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-facts__num {
  display: block;
  font-size: 26px;
  line-height: 1.05;
  color: var(--gold);
  letter-spacing: .01em;
}

.page-about .ab-facts__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: rgba(251, 246, 236, .72);
}

/* ---------- 通用小节头 ---------- */
.page-about .ab-secthead {
  max-width: 62ch;
  margin-bottom: var(--sp-4);
}

.page-about .ab-secthead h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 26px;
  line-height: 1.3;
  margin: var(--sp-2) 0 var(--sp-2);
  color: var(--deep);
}

.page-about .ab-secthead__lede {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: #40606a;
}

/* ---------- 01 起点 ---------- */
.page-about .ab-intro__grid {
  display: grid;
  gap: var(--sp-4);
}

.page-about .ab-intro__text h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 26px;
  line-height: 1.3;
  margin: var(--sp-2) 0 var(--sp-3);
  color: var(--deep);
}

.page-about .ab-intro__text p {
  max-width: var(--ab-measure);
  margin: 0 0 var(--sp-2);
  font-size: 16px;
  line-height: 1.85;
  color: #2f4f58;
}

.page-about .ab-intro__media {
  margin: 0;
}

.page-about .media {
  overflow: hidden;
  border-radius: var(--r-md);
  background: var(--glass);
}

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

.page-about .media__cap {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist-deep);
}

/* ---------- 02 迭代时间线 ---------- */
.page-about .ab-timeline {
  background: linear-gradient(180deg, rgba(230, 242, 241, 0) 0%, rgba(230, 242, 241, .85) 22%, rgba(230, 242, 241, .85) 78%, rgba(230, 242, 241, 0) 100%);
}

.page-about .ab-track {
  position: relative;
  display: grid;
  gap: var(--sp-4);
  margin: 0;
  padding: 0 0 0 var(--sp-3);
  list-style: none;
}

.page-about .ab-track::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 3px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--coral) 0%, var(--wave) 42%, rgba(14, 106, 114, .18) 100%);
}

.page-about .ab-track__item {
  position: relative;
  display: grid;
  gap: 10px;
}

.page-about .ab-track__item::before {
  content: "";
  position: absolute;
  left: calc(var(--sp-3) * -1 - 1px);
  top: 12px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--sand);
  border: 2.5px solid var(--tide);
}

.page-about .ab-track__item:first-child::before {
  border-color: var(--coral);
}

.page-about .ab-track__year {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: 20px;
  letter-spacing: .08em;
  color: var(--deep);
  -webkit-text-stroke: .4px var(--gold);
}

.page-about .ab-track__year::before {
  content: "";
  width: 24px;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--gold), var(--coral));
}

.page-about .ab-stage {
  border: 1px solid rgba(14, 106, 114, .18);
  border-radius: var(--r-md);
  background: var(--sand);
  overflow: hidden;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}

.page-about .ab-stage:hover {
  border-color: rgba(14, 106, 114, .34);
  box-shadow: var(--shadow-soft);
}

.page-about .ab-stage__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
  padding: var(--sp-3);
  cursor: pointer;
  list-style: none;
  color: var(--deep);
}

.page-about .ab-stage__summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-stage__summary:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: -2px;
}

.page-about .ab-stage__title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .ab-stage__hint {
  position: relative;
  flex: none;
  width: 22px;
  height: 22px;
  border: 1px solid rgba(14, 106, 114, .38);
  border-radius: 50%;
}

.page-about .ab-stage__hint::before,
.page-about .ab-stage__hint::after {
  content: "";
  position: absolute;
  background: var(--tide);
  border-radius: 1px;
}

.page-about .ab-stage__hint::before {
  top: 50%;
  left: 5px;
  right: 5px;
  height: 1.5px;
  transform: translateY(-50%);
}

.page-about .ab-stage__hint::after {
  left: 50%;
  top: 5px;
  bottom: 5px;
  width: 1.5px;
  transform: translateX(-50%) scaleY(1);
  transition: transform .25s var(--ease);
}

.page-about .ab-stage[open] .ab-stage__hint::after {
  transform: translateX(-50%) scaleY(0);
}

.page-about .ab-stage__body {
  padding: 0 var(--sp-3) var(--sp-3);
}

.page-about .ab-stage__body p {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: #3a5b64;
}

/* ---------- 03 斜切数据带 ---------- */
.page-about .ab-band {
  position: relative;
  margin: var(--sp-6) 0;
  padding: calc(var(--sp-6) + 14px) 0;
  background:
    radial-gradient(120% 150% at 10% 0%, rgba(63, 210, 199, .32), transparent 58%),
    radial-gradient(90% 130% at 96% 100%, rgba(255, 107, 74, .26), transparent 62%),
    linear-gradient(112deg, var(--deep-2) 0%, #0a4f57 52%, var(--tide) 100%);
  color: var(--sand);
  transform: skewY(-2deg);
  overflow: hidden;
}

.page-about .ab-band__inner {
  transform: skewY(2deg);
}

.page-about .ab-band__eyebrow {
  color: var(--gold);
}

.page-about .ab-band h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 26px;
  line-height: 1.3;
  margin: var(--sp-2) 0 0;
  color: var(--sand);
}

.page-about .ab-band__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-4) var(--sp-3);
  margin: var(--sp-5) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-band__num {
  display: block;
  font-size: 32px;
  line-height: 1;
  color: var(--gold);
}

.page-about .ab-band__label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  letter-spacing: .04em;
  color: rgba(251, 246, 236, .74);
}

.page-about .ab-band__note {
  max-width: 54ch;
  margin: var(--sp-5) 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(251, 246, 236, .84);
}

/* ---------- 04 区域落地 ---------- */
.page-about .ab-map__grid {
  display: grid;
  gap: var(--sp-4);
}

.page-about .ab-dots {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-md);
  border: 1px solid rgba(14, 106, 114, .16);
  background: linear-gradient(160deg, rgba(230, 242, 241, .9), rgba(251, 246, 236, .5));
}

.page-about .ab-regions {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-region {
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--r-sm);
  border: 1px solid transparent;
  transition: background .25s var(--ease), border-color .25s var(--ease), transform .25s var(--ease);
}

.page-about .ab-region:hover,
.page-about .ab-region:focus-within {
  background: var(--glass);
  border-color: rgba(14, 106, 114, .2);
  transform: translateX(4px);
}

.page-about .ab-region__name {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-2);
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--deep);
}

.page-about .ab-region__count {
  flex: none;
  font-size: 12px;
  color: var(--tide);
}

.page-about .ab-region__note {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: #4a6b72;
}

.page-about .ab-map__media {
  margin: var(--sp-5) 0 0;
}

/* ---------- 05 团队与协作 ---------- */
.page-about .ab-team__grid {
  display: grid;
  gap: var(--sp-4);
}

.page-about .ab-team__text h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 26px;
  line-height: 1.3;
  margin: var(--sp-2) 0 var(--sp-3);
  color: var(--deep);
}

.page-about .ab-team__text > p {
  max-width: var(--ab-measure);
  margin: 0 0 var(--sp-4);
  font-size: 16px;
  line-height: 1.85;
  color: #2f4f58;
}

.page-about .ab-crews {
  display: grid;
  gap: var(--sp-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-crew {
  padding: var(--sp-3);
  border-radius: var(--r-md);
  border: 1px solid rgba(14, 106, 114, .16);
  background: rgba(255, 255, 255, .72);
  transition: border-color .25s var(--ease), background .25s var(--ease);
}

.page-about .ab-crew:hover {
  border-color: rgba(242, 181, 68, .7);
  background: rgba(251, 246, 236, .9);
}

.page-about .ab-crew__name {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 700;
  color: var(--deep);
}

.page-about .ab-crew__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: #4a6b72;
}

.page-about .ab-team__media {
  margin: 0;
}

/* ---------- 06 凭据 ---------- */
.page-about .ab-honor {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-honor li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--sp-3);
  align-items: start;
  padding: var(--sp-3) 0;
  border-top: 1px solid rgba(14, 106, 114, .16);
}

.page-about .ab-honor li:last-child {
  border-bottom: 1px solid rgba(14, 106, 114, .16);
}

.page-about .ab-honor__key {
  flex: none;
  padding: 4px 10px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(242, 181, 68, .8);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--tide);
  white-space: nowrap;
}

.page-about .ab-honor p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: #35555e;
}

/* ---------- 收束 ---------- */
.page-about .ab-cta {
  max-width: 620px;
  margin: 0 auto;
  padding: var(--sp-6) var(--sp-3) var(--sp-7);
  text-align: center;
}

.page-about .ab-cta h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 24px;
  line-height: 1.35;
  margin: 0 0 var(--sp-3);
  color: var(--deep);
}

.page-about .ab-cta p {
  margin: 0 0 var(--sp-4);
  font-size: 15px;
  line-height: 1.85;
  color: #40606a;
}

.page-about .ab-cta__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--sp-2);
}

.page-about .ab-cta__meta {
  margin: var(--sp-4) 0 0;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--tide);
}

/* =========================================================
   响应式
   ========================================================= */

@media (min-width: 720px) {
  .page-about .ab-hero__lead h1 {
    font-size: 44px;
  }

  .page-about .ab-secthead h2,
  .page-about .ab-intro__text h2,
  .page-about .ab-team__text h2,
  .page-about .ab-band h2 {
    font-size: 30px;
  }

  .page-about .ab-band__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-band__num {
    font-size: 40px;
  }

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

  .page-about .ab-honor li {
    grid-template-columns: 96px minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 960px) {
  .page-about .ab-hero {
    padding: var(--sp-5) 0 var(--sp-7);
  }

  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(300px, .78fr);
    align-items: start;
    gap: var(--sp-6);
  }

  .page-about .ab-hero__lead h1 {
    font-size: 56px;
  }

  .page-about .ab-facts {
    padding: var(--sp-5) var(--sp-4);
  }

  .page-about .ab-facts__num {
    font-size: 32px;
  }

  /* 起点：正文长栏 + 右侧通栏图 */
  .page-about .ab-intro__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: center;
    gap: var(--sp-6);
  }

  .page-about .ab-secthead h2,
  .page-about .ab-intro__text h2,
  .page-about .ab-team__text h2,
  .page-about .ab-band h2 {
    font-size: 34px;
  }

  /* 时间线做成旁注主轴 */
  .page-about .ab-track {
    grid-template-columns: 88px minmax(0, 1fr);
    grid-auto-rows: min-content;
    column-gap: var(--sp-5);
    padding-left: var(--sp-4);
  }

  .page-about .ab-track::before {
    left: 8px;
  }

  .page-about .ab-track__item {
    display: contents;
  }

  .page-about .ab-track__item::before {
    display: none;
  }

  .page-about .ab-track__year {
    grid-column: 1;
    margin-top: 22px;
    font-size: 24px;
    justify-content: flex-end;
  }

  .page-about .ab-track__year::before {
    order: 2;
  }

  .page-about .ab-stage {
    grid-column: 2;
    margin-bottom: var(--sp-3);
  }

  /* 区域落地 */
  .page-about .ab-map__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
    gap: var(--sp-6);
  }

  .page-about .ab-map__media {
    margin-top: var(--sp-6);
  }

  /* 团队 */
  .page-about .ab-team__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
    gap: var(--sp-6);
  }

  .page-about .ab-team__media {
    position: sticky;
    top: 120px;
  }

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

  .page-about .ab-cta {
    padding-bottom: var(--sp-7);
  }

  .page-about .ab-cta h2 {
    font-size: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-stage__hint::after,
  .page-about .ab-region,
  .page-about .ab-crew,
  .page-about .ab-stage {
    transition: none;
  }
}