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

.page-about {
  --ab-hair: 1px solid rgba(184, 175, 163, .55);
  --ab-hair-light: 1px solid rgba(243, 237, 227, .24);
  background-color: var(--paper);
  color: var(--ink);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.05;
  margin: 0;
}

.page-about p {
  margin: 0 0 1em;
}

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

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

/* ---------- 首屏 ---------- */

.about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4.5vw, 54px) 0 clamp(40px, 6vw, 86px);
  background:
    linear-gradient(158deg, var(--indigo) 0%, var(--indigo-deep) 58%, var(--sky-deep) 100%);
  color: var(--paper);
}

.about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(118deg, rgba(243, 237, 227, .055) 0 2px, transparent 2px 28px);
  pointer-events: none;
}

.about-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  top: -22%;
  width: min(620px, 78vw);
  aspect-ratio: 1;
  background: radial-gradient(circle, rgba(198, 255, 61, .16), transparent 66%);
  pointer-events: none;
}

.about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 4vw, 54px);
  align-items: end;
}

.page-about .about-hero .breadcrumbs,
.page-about .about-hero .breadcrumbs a {
  color: var(--paper-dim);
}

.page-about .about-hero .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 0 0 clamp(14px, 2vw, 22px);
  padding: 0;
  font-size: 13px;
  letter-spacing: .02em;
}

.page-about .about-hero .breadcrumbs li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--stone);
}

.page-about .about-hero .eyebrow {
  display: inline-block;
  margin: 0 0 10px;
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.about-hero h1 {
  font-size: clamp(38px, 8.4vw, 88px);
  line-height: 1.02;
  text-wrap: balance;
  max-width: 20ch;
}

.about-hero__lede {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  max-width: 64ch;
  font-size: clamp(15.5px, 1.9vw, 18.5px);
  line-height: 1.85;
  color: var(--paper-dim);
}

.about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 32px);
}

.about-hero__figures {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  align-content: end;
}

.about-hero__figures li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 6px 14px;
  padding: 12px 14px 12px 16px;
  border-left: 5px solid var(--lime);
  background: rgba(243, 237, 227, .07);
  transition: background-color .25s var(--ease), transform .25s var(--ease);
}

.about-hero__figures li:hover {
  background: rgba(198, 255, 61, .13);
  transform: translateX(4px);
}

.about-hero__figures .num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.6vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--lime);
}

.about-hero__figures .unit {
  font-size: 13px;
  line-height: 1.6;
  color: var(--paper-dim);
}

/* ---------- 章节通用 ---------- */

.about-section {
  border-top: var(--border-heavy);
  padding: clamp(46px, 7vw, 100px) 0;
}

.about-section--origin,
.about-section--team {
  background-color: var(--paper);
  color: var(--ink);
}

.about-section--rhythm {
  background-color: var(--sky);
  color: var(--paper);
}

.about-section--youth {
  background-color: var(--indigo);
  color: var(--paper);
}

.about-section--eco {
  background-color: var(--ink);
  color: var(--paper);
}

.about-section--honor {
  background-color: var(--ochre);
  color: var(--paper);
}

.about-head {
  display: grid;
  gap: 10px;
  max-width: 74ch;
  margin-bottom: clamp(26px, 4vw, 50px);
}

.about-head__index {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .18em;
  color: var(--ochre);
}

.about-section--rhythm .about-head__index,
.about-section--youth .about-head__index,
.about-section--eco .about-head__index,
.about-section--honor .about-head__index {
  color: var(--lime);
}

.about-head__title {
  font-size: clamp(28px, 4.8vw, 54px);
  text-wrap: balance;
}

.about-head__sub {
  margin: 0;
  font-size: clamp(15px, 1.8vw, 17.5px);
  line-height: 1.8;
  opacity: .82;
}

.about-section--rhythm .about-head__sub,
.about-section--youth .about-head__sub,
.about-section--eco .about-head__sub,
.about-section--honor .about-head__sub {
  opacity: 1;
  color: var(--paper-dim);
}

/* ---------- 通用图片容器 ---------- */

.about-media {
  position: relative;
  margin: 0;
  border: var(--border-heavy);
  box-shadow: var(--shadow-block);
  background-color: var(--paper-dim);
  overflow: hidden;
}

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

.about-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 52%, rgba(23, 19, 15, .52) 100%);
  pointer-events: none;
}

.about-media figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  padding: 9px 14px;
  font-size: 12.5px;
  line-height: 1.5;
  letter-spacing: .02em;
  color: var(--paper);
}

/* ---------- 01 起点 ---------- */

.about-origin__grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 44px);
  align-items: start;
}

.about-origin__body {
  font-size: clamp(15.5px, 1.8vw, 17.5px);
  line-height: 1.85;
}

.about-lines {
  list-style: none;
  margin: clamp(30px, 4.5vw, 56px) 0 0;
  padding: 0;
  border-top: var(--border-heavy);
}

.about-lines li {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 0 16px;
  padding: 20px 4px;
  border-bottom: var(--ab-hair);
  transition: background-color .25s var(--ease), padding-left .25s var(--ease);
}

.about-lines li:hover {
  background-color: var(--paper-dim);
  padding-left: 14px;
}

.about-lines__no {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--ochre);
  padding-top: 4px;
}

.about-lines__name {
  font-size: clamp(19px, 2.3vw, 24px);
  margin-bottom: 8px;
}

.about-lines__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(23, 19, 15, .78);
}

/* ---------- 02 更新节奏 ---------- */

.about-rhythm {
  display: grid;
  gap: clamp(14px, 2vw, 24px);
}

.about-rhythm__item {
  padding: clamp(18px, 2.4vw, 28px);
  border: 3px solid rgba(243, 237, 227, .5);
  background: rgba(23, 19, 15, .2);
  transition: transform .25s var(--ease), border-color .25s var(--ease), background-color .25s var(--ease);
}

.about-rhythm__item:hover,
.about-rhythm__item:focus-within {
  transform: translateY(-6px);
  border-color: var(--lime);
  background: rgba(23, 19, 15, .36);
}

.about-rhythm__when {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--lime);
}

.about-rhythm__name {
  font-size: clamp(20px, 2.4vw, 25px);
  margin-bottom: 10px;
}

.about-rhythm__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-dim);
}

/* ---------- 03 团队 ---------- */

.about-team__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.about-team__roles {
  list-style: none;
  margin: 0;
  padding: 0 0 0 20px;
  position: relative;
  display: grid;
  gap: clamp(16px, 2.2vw, 26px);
}

.about-team__roles::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 16px;
  bottom: 16px;
  width: 3px;
  background: var(--ochre);
}

.about-team__role {
  position: relative;
  padding: clamp(16px, 2.2vw, 24px);
  border: var(--border-heavy);
  background: var(--paper);
  box-shadow: 5px 5px 0 var(--ink);
  transition: transform .24s var(--ease), box-shadow .24s var(--ease);
}

.about-team__role::before {
  content: "";
  position: absolute;
  left: -23px;
  top: 26px;
  width: 12px;
  height: 12px;
  background: var(--lime);
  border: 3px solid var(--ink);
}

.about-team__role:hover {
  transform: translate(-3px, -6px);
  box-shadow: 10px 11px 0 var(--ink);
}

.about-team__count {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--ochre);
  margin-bottom: 6px;
}

.about-team__role-name {
  font-size: clamp(19px, 2.2vw, 23px);
  margin-bottom: 10px;
}

.about-team__role-desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(23, 19, 15, .78);
}

/* ---------- 04 梯队分层 ---------- */

.about-youth__grid {
  display: grid;
  gap: clamp(24px, 3.6vw, 46px);
  align-items: start;
}

.about-youth__bands {
  display: grid;
  gap: 12px;
}

.about-youth__band {
  padding: 16px 18px;
  border-left: 7px solid var(--lime);
  border-top: var(--ab-hair-light);
  background: rgba(243, 237, 227, .07);
  transition: background-color .25s var(--ease), transform .25s var(--ease);
}

.about-youth__band:nth-child(2) {
  border-left-color: var(--gold);
  margin-left: 12px;
}

.about-youth__band:nth-child(3) {
  border-left-color: var(--paper);
  margin-left: 24px;
}

.about-youth__band:nth-child(4) {
  border-left-color: var(--lime-dark);
  margin-left: 36px;
}

.about-youth__band:hover {
  background: rgba(198, 255, 61, .12);
  transform: translateX(4px);
}

.about-youth__age {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--lime);
}

.about-youth__band:nth-child(2) .about-youth__age {
  color: var(--gold);
}

.about-youth__band:nth-child(3) .about-youth__age {
  color: var(--paper);
}

.about-youth__band p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--paper-dim);
}

.about-youth__cats {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(24px, 3.4vw, 40px) 0 0;
  padding: 0;
}

.about-youth__cats li {
  padding: 7px 14px;
  border: 2px solid var(--paper);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--paper);
}

/* ---------- 05 协作与版本 ---------- */

.about-eco__rail {
  display: flex;
  gap: clamp(14px, 2vw, 22px);
  overflow-x: auto;
  padding: 6px var(--gutter) 22px;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--lime) rgba(243, 237, 227, .18);
}

.about-eco__rail:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: -3px;
}

.about-eco__card {
  flex: 0 0 clamp(212px, 66vw, 292px);
  scroll-snap-align: start;
  display: grid;
  align-content: start;
  gap: 8px;
  padding: clamp(18px, 2.4vw, 26px);
  border: 3px solid var(--paper);
  background: rgba(243, 237, 227, .06);
  transition: transform .25s var(--ease), background-color .25s var(--ease), border-color .25s var(--ease);
}

.about-eco__card:hover {
  transform: translateY(-6px);
  background: rgba(198, 255, 61, .12);
  border-color: var(--lime);
}

.about-eco__num {
  font-family: var(--font-mono);
  font-size: clamp(32px, 4.4vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--lime);
}

.about-eco__unit {
  font-size: .45em;
  letter-spacing: 0;
  color: var(--paper-dim);
  margin-left: 2px;
}

.about-eco__label {
  font-size: clamp(17px, 2vw, 20px);
}

.about-eco__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper-dim);
}

.about-eco__versions {
  list-style: none;
  margin: clamp(30px, 4.4vw, 56px) 0 0;
  padding: 0;
  border-top: 3px solid var(--lime);
}

.about-eco__versions li {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 6px 16px;
  padding: 18px 0;
  border-bottom: var(--ab-hair-light);
}

.about-eco__year {
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--lime);
}

.about-eco__ver {
  font-family: var(--font-display);
  font-size: clamp(17px, 2vw, 21px);
  letter-spacing: -.01em;
  color: var(--paper);
}

.about-eco__note {
  grid-column: 2;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--paper-dim);
}

/* ---------- 06 荣誉与承诺 ---------- */

.about-honor__awards {
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
}

.about-honor__award {
  padding: clamp(18px, 2.6vw, 28px);
  border: var(--border-heavy);
  background: var(--paper);
  color: var(--ink);
  box-shadow: var(--shadow-block);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}

.about-honor__award:hover {
  transform: translate(-3px, -6px);
  box-shadow: var(--shadow-hover);
}

.about-honor__year {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 10px;
  background: var(--ink);
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
}

.about-honor__award-name {
  font-size: clamp(19px, 2.3vw, 24px);
  margin-bottom: 10px;
}

.about-honor__award p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(23, 19, 15, .78);
}

.about-honor__promises {
  list-style: none;
  margin: clamp(26px, 3.6vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.about-honor__promises li {
  position: relative;
  padding-left: 26px;
  font-size: clamp(15px, 1.8vw, 17px);
  line-height: 1.8;
  color: var(--paper);
}

.about-honor__promises li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 12px;
  height: 12px;
  background: var(--lime);
  border: 2px solid var(--ink);
}

.about-cta {
  margin-top: clamp(28px, 4.2vw, 52px);
  padding: clamp(20px, 3vw, 34px);
  border: var(--border-heavy);
  background: var(--paper);
  color: var(--ink);
  box-shadow: var(--shadow-block);
  display: grid;
  gap: 18px;
}

.about-cta__text {
  margin: 0;
  font-size: clamp(15px, 1.8vw, 17px);
  line-height: 1.8;
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .about-lines li {
    grid-template-columns: 66px minmax(0, 1fr);
    padding: 22px 6px;
  }

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

  .about-rhythm__item:nth-child(2) {
    margin-top: 26px;
  }

  .about-rhythm__item:nth-child(3) {
    margin-top: 52px;
  }

  .about-eco__versions li {
    grid-template-columns: 96px minmax(0, 1.05fr) minmax(0, 1.5fr);
    align-items: baseline;
    padding: 20px 0;
  }

  .about-eco__note {
    grid-column: 3;
  }

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

  .about-cta {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: center;
  }

  .about-cta__links {
    justify-content: flex-end;
  }
}

@media (min-width: 900px) {
  .about-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(260px, 1fr);
  }

  .about-hero__figures li:nth-child(2) {
    margin-left: 22px;
  }

  .about-hero__figures li:nth-child(3) {
    margin-left: 44px;
  }

  .about-origin__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  }

  .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
    gap: clamp(30px, 4vw, 56px);
  }

  .about-youth__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }

  .about-team__media,
  .about-youth__media {
    position: sticky;
    top: 24px;
  }

  .about-origin__media {
    margin-top: 8px;
  }
}

@media (max-width: 520px) {
  .about-youth__band:nth-child(2),
  .about-youth__band:nth-child(3),
  .about-youth__band:nth-child(4) {
    margin-left: 0;
  }

  .about-lines li {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .about-lines__no {
    padding-top: 0;
  }
}