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

.page-about {
  display: block;
  font-family: var(--font-body);
  color: var(--text-on-paper);
  background: var(--paper);
  overflow-x: clip;
}

.page-about .about-stage,
.page-about [id^="stage-"] {
  scroll-margin-top: 88px;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 5vw, 42px) 0 clamp(40px, 8vw, 86px);
  background:
    radial-gradient(118% 88% at 88% 0%, rgba(226, 118, 47, 0.20) 0%, rgba(226, 118, 47, 0) 58%),
    linear-gradient(168deg, var(--ink-deep) 0%, var(--ink) 54%, var(--ink-soft) 100%);
  color: var(--text-on-ink);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(199, 208, 206, 0.10) 0 1px,
    transparent 1px 96px
  );
  pointer-events: none;
}

.page-about .about-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-about .about-crumbs {
  margin-bottom: clamp(26px, 5vw, 48px);
}

.page-about .about-crumbs .crumbs,
.page-about .about-crumbs .crumbs li,
.page-about .about-crumbs .crumbs ol {
  color: var(--text-muted-on-ink);
}

.page-about .about-crumbs .crumbs a {
  color: var(--text-on-ink);
  text-decoration-color: rgba(226, 118, 47, 0.65);
  text-underline-offset: 3px;
}

.page-about .about-crumbs .crumbs a:hover {
  color: var(--accent-soft);
}

.page-about .about-hero__eyebrow {
  margin: 0 0 14px;
  color: var(--accent-soft);
  letter-spacing: 0.14em;
}

.page-about .about-hero__title {
  margin: 0 0 clamp(16px, 3vw, 26px);
  max-width: 15em;
  font-family: var(--font-display);
  font-size: clamp(31px, 7.4vw, 62px);
  font-weight: 600;
  line-height: 1.06;
  letter-spacing: -0.02em;
  text-wrap: balance;
  color: var(--text-on-ink);
}

.page-about .about-hero__lede {
  margin: 0 0 clamp(28px, 5vw, 46px);
  max-width: 42em;
  font-size: clamp(15px, 2.4vw, 18px);
  line-height: 1.9;
  color: var(--text-muted-on-ink);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: rgba(199, 208, 206, 0.22);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-facts__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px 16px;
  background: rgba(14, 24, 40, 0.58);
}

.page-about .about-facts__num {
  font-size: clamp(22px, 5vw, 30px);
  font-weight: 600;
  line-height: 1;
  color: var(--accent-soft);
}

.page-about .about-facts__label {
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--text-muted-on-ink);
}

/* ---------- 章节刻度导航 ---------- */

.page-about .about-years {
  background: var(--ink-deep);
  border-top: 1px solid rgba(199, 208, 206, 0.16);
  border-bottom: 1px solid rgba(199, 208, 206, 0.16);
}

.page-about .about-years__inner {
  display: flex;
  gap: 8px;
  padding-top: 13px;
  padding-bottom: 13px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

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

.page-about .year-chip {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border: 1px solid rgba(199, 208, 206, 0.3);
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 13.5px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--text-muted-on-ink);
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease;
}

.page-about .year-chip__num {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-about .year-chip:hover,
.page-about .year-chip:focus-visible {
  border-color: var(--accent);
  color: var(--text-on-ink);
}

.page-about .year-chip:focus-visible {
  outline: 2px solid var(--accent-soft);
  outline-offset: 2px;
}

.page-about .year-chip.is-current,
.page-about .year-chip[aria-current="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #1A1208;
  font-weight: 600;
}

.page-about .year-chip.is-current .year-chip__num,
.page-about .year-chip[aria-current="true"] .year-chip__num {
  color: rgba(26, 18, 8, 0.72);
}

/* ---------- 通用章节 ---------- */

.page-about .about-stage {
  padding: clamp(44px, 9vw, 96px) 0;
  background: var(--paper);
  color: var(--text-on-paper);
}

.page-about .about-stage--deep {
  background: linear-gradient(180deg, var(--ink-deep) 0%, var(--ink) 100%);
  color: var(--text-on-ink);
}

.page-about .about-stage--index {
  background: var(--paper-soft);
}

.page-about .about-stage .eyebrow {
  margin: 0;
  color: var(--gold-deep);
  letter-spacing: 0.14em;
}

.page-about .about-stage--deep .eyebrow {
  color: var(--accent-soft);
}

.page-about .about-stage__title {
  margin: 10px 0 18px;
  max-width: 20em;
  font-family: var(--font-display);
  font-size: clamp(24px, 5vw, 42px);
  font-weight: 600;
  line-height: 1.16;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

.page-about .about-stage__lede {
  margin: 0 0 clamp(28px, 5vw, 46px);
  max-width: 42em;
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.9;
  color: var(--text-muted-on-paper);
}

.page-about .about-stage--deep .about-stage__lede {
  color: var(--text-muted-on-ink);
}

/* ---------- 图片 ---------- */

.page-about .about-figure {
  margin: 0 0 clamp(30px, 6vw, 54px);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--paper);
  border: 1px solid rgba(199, 208, 206, 0.55);
  box-shadow: var(--shadow-paper);
}

.page-about .about-stage--deep .about-figure {
  border-color: rgba(199, 208, 206, 0.2);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-figure__cap {
  padding: 12px 18px 14px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-muted-on-paper);
  border-top: 1px solid var(--divider);
  background: var(--paper);
}

.page-about .about-band-figure {
  position: relative;
  margin: 0;
  background: var(--ink-deep);
  overflow: hidden;
}

.page-about .about-band-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  opacity: 0.86;
}

.page-about .about-band-figure__cap {
  position: absolute;
  left: 20px;
  bottom: 18px;
  padding: 6px 15px;
  border-radius: var(--radius-pill);
  background: rgba(14, 24, 40, 0.78);
  color: var(--text-on-ink);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

/* ---------- 来路：纵向账册时间线 ---------- */

.page-about .about-ledger {
  position: relative;
  margin: 0;
  padding: 4px 0 0 26px;
  list-style: none;
}

.page-about .about-ledger::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 16px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--accent) 0%, var(--gold) 44%, var(--divider) 100%);
}

.page-about .about-ledger__item {
  position: relative;
  padding-bottom: clamp(24px, 5vw, 42px);
}

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

.page-about .about-ledger__item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 7px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--accent);
  box-sizing: content-box;
}

.page-about .about-ledger__mark {
  display: inline-block;
  margin-bottom: 8px;
  padding: 3px 11px;
  border-radius: var(--radius-pill);
  background: rgba(176, 138, 74, 0.16);
  color: var(--gold-deep);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.page-about .about-ledger__title {
  margin: 0 0 7px;
  font-family: var(--font-display);
  font-size: clamp(18px, 3.4vw, 24px);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.01em;
}

.page-about .about-ledger__item p {
  margin: 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-muted-on-paper);
}

/* ---------- 团队分工 ---------- */

.page-about .about-org {
  display: grid;
  gap: clamp(14px, 2.6vw, 20px);
}

.page-about .about-org__line {
  padding: clamp(20px, 4vw, 28px);
  border-radius: var(--radius-lg);
  background: rgba(246, 241, 230, 0.06);
  border: 1px solid rgba(199, 208, 206, 0.18);
}

.page-about .about-org__line--a {
  border-left: 3px solid var(--accent);
}

.page-about .about-org__line--b {
  border-left: 3px solid var(--gold);
}

.page-about .about-org__line--c {
  border-left: 3px solid var(--green-soft);
}

.page-about .about-org__name {
  margin: 14px 0 8px;
  font-family: var(--font-display);
  font-size: clamp(19px, 3.6vw, 25px);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--text-on-ink);
}

.page-about .about-org__desc {
  margin: 0 0 18px;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-muted-on-ink);
}

.page-about .about-roles {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-roles__tag {
  padding: 10px 14px;
  border-radius: var(--radius-md);
  background: rgba(246, 241, 230, 0.07);
  border: 1px solid rgba(199, 208, 206, 0.16);
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-on-ink);
  outline-offset: 2px;
  transition: background-color 180ms ease, border-color 180ms ease;
}

.page-about .about-roles__tag:hover,
.page-about .about-roles__tag:focus-visible {
  background: rgba(226, 118, 47, 0.14);
  border-color: rgba(226, 118, 47, 0.55);
}

.page-about .about-roles__tag:focus-visible {
  outline: 2px solid var(--accent-soft);
}

.page-about .about-roles__note {
  display: block;
  margin-top: 5px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-muted-on-ink);
}

/* ---------- 维护节奏 ---------- */

.page-about .about-rhythm {
  display: grid;
  gap: 1px;
  border: 1px solid var(--divider);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--divider);
}

.page-about .about-rhythm__row {
  display: grid;
  gap: 8px;
  padding: clamp(18px, 3.6vw, 28px);
  background: var(--paper);
}

.page-about .about-rhythm__when {
  justify-self: start;
  padding: 4px 13px;
  border-radius: var(--radius-pill);
  background: var(--ink);
  color: var(--text-on-ink);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.page-about .about-rhythm__body h3 {
  margin: 4px 0 6px;
  font-family: var(--font-display);
  font-size: clamp(17px, 3.2vw, 22px);
  font-weight: 600;
  line-height: 1.3;
}

.page-about .about-rhythm__body p {
  margin: 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-muted-on-paper);
}

/* ---------- 编号体系 ---------- */

.page-about .about-number {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 0 0 clamp(26px, 5vw, 42px);
}

.page-about .about-number__stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 20px 22px;
  border-radius: var(--radius-lg);
  background: var(--ink);
  border: 1px solid var(--ink-soft);
  box-shadow: var(--shadow-paper);
}

.page-about .about-number__big {
  font-size: clamp(30px, 7vw, 46px);
  font-weight: 600;
  line-height: 1;
  color: var(--accent-soft);
}

.page-about .about-number__unit {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-muted-on-ink);
}

.page-about .about-rules {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rules__item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: var(--paper);
  border: 1px solid var(--divider);
}

.page-about .about-rules__idx {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: var(--ink);
  color: var(--accent-soft);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.page-about .about-rules__item h3 {
  margin: 6px 0 4px;
  font-family: var(--font-display);
  font-size: clamp(16px, 3vw, 20px);
  font-weight: 600;
  line-height: 1.35;
}

.page-about .about-rules__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.88;
  color: var(--text-muted-on-paper);
}

/* ---------- 协作与认可 ---------- */

.page-about .about-partner {
  display: grid;
  gap: clamp(20px, 4vw, 36px);
}

.page-about .about-partner__col h3 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--accent-soft);
}

.page-about .about-partner__list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-partner__list li {
  position: relative;
  padding: 13px 16px 13px 36px;
  border-radius: var(--radius-md);
  background: rgba(246, 241, 230, 0.06);
  border: 1px solid rgba(199, 208, 206, 0.16);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-on-ink);
}

.page-about .about-partner__list li::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 20px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent);
}

.page-about .about-partner__note {
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding-top: 20px;
  border-top: 1px solid rgba(199, 208, 206, 0.2);
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-muted-on-ink);
}

.page-about .about-partner__note a {
  color: var(--accent-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-about .about-partner__note a:hover {
  color: var(--text-on-ink);
}

/* ---------- 收尾 ---------- */

.page-about .about-cta {
  padding: clamp(40px, 8vw, 76px) 0 clamp(48px, 9vw, 92px);
  background: var(--paper);
  border-top: 1px solid var(--divider);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 24px;
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(22px, 4.4vw, 32px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-muted-on-paper);
}

.page-about .about-cta__text a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--accent);
}

.page-about .about-cta__text a:hover {
  color: var(--accent);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-cta__actions .btn {
  min-height: 46px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 680px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-number {
    gap: 18px;
  }
}

@media (min-width: 760px) {
  .page-about .about-rhythm__row {
    grid-template-columns: 138px minmax(0, 1fr);
    column-gap: 26px;
    align-items: start;
  }

  .page-about .about-rhythm__body h3 {
    margin-top: 0;
  }

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

  .page-about .about-org__line--c {
    grid-column: 1 / -1;
  }

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

@media (min-width: 900px) {
  .page-about .about-org {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-org__line--c {
    grid-column: auto;
  }

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

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 44px;
  }
}

@media (hover: hover) and (pointer: fine) {
  .page-about .about-roles__tag {
    position: relative;
    padding-right: 32px;
  }

  .page-about .about-roles__tag::after {
    content: "+";
    position: absolute;
    right: 14px;
    top: 9px;
    font-family: var(--font-mono);
    font-size: 14px;
    color: var(--accent-soft);
    transition: transform 180ms ease;
  }

  .page-about .about-roles__tag:hover::after,
  .page-about .about-roles__tag:focus-visible::after {
    transform: rotate(45deg);
  }

  .page-about .about-roles__note {
    max-height: 0;
    margin-top: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 180ms ease, opacity 180ms ease, margin-top 180ms ease;
  }

  .page-about .about-roles__tag:hover .about-roles__note,
  .page-about .about-roles__tag:focus-visible .about-roles__note {
    max-height: 12em;
    margin-top: 6px;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .year-chip,
  .page-about .about-roles__tag,
  .page-about .about-roles__note,
  .page-about .about-roles__tag::after {
    transition: none;
  }
}
<<<END>>>