/* =========================================================
   品牌故事 /story/ —— 页面作用域 .page-about
   ========================================================= */
.page-about {
  --about-rail: 28px;
  --about-ghost-size: clamp(2.5rem, 9vw, 6rem);
  --about-paper-ink: rgba(11, 27, 43, .62);
  overflow-x: clip;
}

.page-about .section {
  padding-block: clamp(56px, 9vw, 104px);
}

/* ---------- 首屏：夜间看台拼贴 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 44px) 0 clamp(48px, 7vw, 72px);
  background:
    radial-gradient(90% 70% at 88% -10%, rgba(59, 255, 154, .18), transparent 62%),
    radial-gradient(70% 60% at 0% 110%, rgba(255, 169, 58, .12), transparent 60%),
    linear-gradient(170deg, var(--ink-deep), var(--ink));
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, rgba(198, 211, 223, .07) 1px, transparent 1px);
  background-size: 25% 100%;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 22px;
  color: var(--silver);
  font-size: .8125rem;
}

.page-about .about-hero .breadcrumb a {
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-hero .breadcrumb a:hover {
  color: var(--green);
  border-bottom-color: var(--green);
}

.page-about .about-crumb-sep {
  margin: 0 .55em;
  color: rgba(198, 211, 223, .45);
}

.page-about .about-hero__kicker {
  margin: 0 0 16px;
  color: var(--green);
  letter-spacing: .16em;
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  max-width: 17ch;
  color: var(--paper);
  font-size: clamp(2rem, 7.2vw, 3.75rem);
  line-height: 1.1;
  letter-spacing: -.02em;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 40em;
  color: var(--silver);
  font-size: clamp(1rem, 2.4vw, 1.125rem);
  line-height: 1.85;
}

.page-about .about-hero__rot {
  position: absolute;
  right: 4px;
  top: 34%;
  display: none;
  color: rgba(198, 211, 223, .5);
  letter-spacing: .32em;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 18px;
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--line-strong);
}

.page-about .about-hero__fact {
  border-left: 2px solid rgba(59, 255, 154, .45);
  padding-left: 12px;
}

.page-about .about-hero__fact .stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4.4vw, 2.25rem);
  line-height: 1.1;
  color: var(--amber);
  letter-spacing: -.01em;
}

.page-about .about-hero__fact .stat__label {
  display: block;
  margin-top: 6px;
  font-size: .8125rem;
  color: var(--silver);
}

/* ---------- 章节头部 ---------- */
.page-about .section-head {
  position: relative;
  margin-bottom: clamp(28px, 4.5vw, 46px);
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.page-about .section--paper .section-head {
  border-bottom-color: var(--ink-line);
}

.page-about .about-ghost {
  position: absolute;
  right: 0;
  top: -.5em;
  font-family: var(--font-mono);
  font-size: var(--about-ghost-size);
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
  opacity: .06;
  pointer-events: none;
  transform: translateX(.35em);
  transition: transform 620ms var(--ease), opacity 620ms var(--ease);
}

.page-about .section--paper .section-head .about-ghost {
  color: var(--ink);
  opacity: .07;
}

.page-about .section-head.is-visible .about-ghost {
  transform: translateX(0);
  opacity: .1;
}

.page-about .section-index {
  display: block;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .22em;
  color: var(--green);
}

.page-about .section--paper .section-index {
  color: var(--pitch);
}

.page-about .section-title {
  margin: .4em 0 .35em;
  max-width: 22ch;
  font-size: clamp(1.5rem, 4.6vw, 2.5rem);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .section--paper .section-title {
  color: var(--ink);
}

.page-about .section-note {
  margin: 0;
  font-size: .8125rem;
  letter-spacing: .04em;
  color: var(--silver);
}

.page-about .section--paper .section-note {
  color: var(--about-paper-ink);
}

/* ---------- 01 名字由来 ---------- */
.page-about .about-origin__body {
  display: grid;
  gap: 26px;
}

.page-about .about-origin__text p {
  margin: 0 0 1.15em;
  color: var(--ink);
  font-size: 1.0625rem;
  line-height: 1.88;
}

.page-about .about-origin__text p:last-child {
  margin-bottom: 0;
  padding-left: 16px;
  border-left: 2px solid var(--green);
}

.page-about .about-origin__figure {
  margin: 10px 0 0;
}

.page-about .figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-card);
}

.page-about .figure__cap {
  margin: 10px 0 0;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--about-paper-ink);
}

.page-about .section--ink .figure__cap,
.page-about .section--pitch .figure__cap {
  color: var(--silver);
}

/* ---------- 02 年表 ---------- */
.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 26px;
}

.page-about .about-jump__label {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .18em;
  color: var(--silver);
}

.page-about .about-jump__chip {
  text-decoration: none;
  color: var(--paper);
  border-color: var(--line-strong);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-jump__chip:hover,
.page-about .about-jump__chip:focus-visible {
  color: var(--ink-deep);
  background: var(--green);
  border-color: var(--green);
}

.page-about .about-years {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-years::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 34px;
  bottom: 34px;
  width: 1px;
  background: linear-gradient(180deg, rgba(59, 255, 154, .55), rgba(110, 127, 168, .38) 50%, rgba(255, 169, 58, .55));
}

.page-about .about-years__item {
  position: relative;
  display: grid;
  gap: 8px;
  padding: 22px 0 22px calc(var(--about-rail) + 10px);
  border-bottom: 1px dashed var(--line);
}

.page-about .about-years__item:last-child {
  border-bottom: 0;
}

.page-about .about-years__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 28px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--legacy);
  box-shadow: 0 0 0 4px rgba(110, 127, 168, .18);
  transition: box-shadow var(--dur) var(--ease);
}

.page-about .about-years__item.is-major::before {
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(59, 255, 154, .2);
}

.page-about .about-years__item.is-current::before {
  background: var(--amber);
  box-shadow: 0 0 0 5px rgba(255, 169, 58, .22);
}

.page-about .about-years__year {
  font-family: var(--font-mono);
  font-size: 1.375rem;
  line-height: 1.2;
  letter-spacing: .04em;
  color: var(--silver);
}

.page-about .about-years__item.is-major .about-years__year {
  color: var(--green);
}

.page-about .about-years__item.is-current .about-years__year {
  color: var(--amber);
}

.page-about .about-years__title {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.6;
  color: var(--paper);
}

.page-about .about-years__text {
  margin: 0;
  max-width: 46em;
  font-size: .9375rem;
  line-height: 1.82;
  color: var(--silver);
}

/* ---------- 03 团队与分工 ---------- */
.page-about .about-team__body {
  display: grid;
  gap: clamp(30px, 5vw, 50px);
}

.page-about .about-team__intro p {
  margin: 0 0 1.1em;
  color: var(--ink);
  font-size: 1.0625rem;
  line-height: 1.88;
}

.page-about .about-team__figure {
  margin: 26px 0 0;
}

.page-about .about-tree__root {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  border: 1px solid var(--ink-line);
  border-left: 3px solid var(--green);
  border-radius: var(--radius-card);
  background: rgba(15, 59, 51, .06);
}

.page-about .about-tree__num {
  font-family: var(--font-mono);
  font-size: 2.25rem;
  line-height: 1;
  color: var(--pitch);
}

.page-about .about-tree__root-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-tree__root-sub {
  margin: 4px 0 0;
  font-size: .8125rem;
  letter-spacing: .04em;
  color: var(--about-paper-ink);
}

.page-about .about-tree__groups {
  position: relative;
  display: grid;
  gap: 20px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-group {
  position: relative;
  padding: 18px 18px 20px;
  border: 1px solid var(--ink-line);
  border-radius: var(--radius-card);
  background: rgba(255, 255, 255, .58);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-group::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -21px;
  width: 1px;
  height: 20px;
  background: rgba(11, 27, 43, .24);
  transition: width var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-group:hover {
  border-color: var(--green);
  box-shadow: var(--shadow-soft);
}

.page-about .about-group:hover::before {
  width: 3px;
  transform: translateX(-1px);
  background: var(--green);
}

.page-about .about-group__name {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-group__count {
  margin: 4px 0 10px;
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .08em;
  color: var(--pitch);
}

.page-about .about-group__desc {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: rgba(11, 27, 43, .78);
}

/* ---------- 04 服务地区 ---------- */
.page-about .about-region__body {
  display: grid;
  gap: 28px;
}

.page-about .about-region__list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-region__item {
  padding: 16px 18px;
  border-left: 2px solid rgba(59, 255, 154, .55);
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
  background: rgba(6, 14, 22, .3);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-region__item:hover {
  border-left-color: var(--amber);
  background: rgba(6, 14, 22, .5);
}

.page-about .about-region__item h3 {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-region__item p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--silver);
}

.page-about .about-region__figure {
  margin: 0;
}

/* ---------- 05 三个时间层 ---------- */
.page-about .about-layers__lead {
  margin: 0 0 28px;
  max-width: 42em;
  font-size: 1.0625rem;
  line-height: 1.88;
  color: var(--silver);
}

.page-about .about-layers__scroll {
  overflow-x: auto;
  padding-bottom: 4px;
}

.page-about .about-layers__table {
  width: 100%;
  min-width: 540px;
  border-collapse: collapse;
  font-size: .9375rem;
}

.page-about .about-layers__caption {
  padding-bottom: 12px;
  text-align: left;
  font-size: .8125rem;
  letter-spacing: .08em;
  color: var(--silver);
}

.page-about .about-layers__table th,
.page-about .about-layers__table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  color: var(--silver);
  line-height: 1.7;
}

.page-about .about-layers__table thead th {
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .14em;
  color: rgba(198, 211, 223, .72);
  border-bottom-color: var(--line-strong);
}

.page-about .about-layers__table tbody th {
  color: var(--paper);
  font-weight: 700;
  white-space: nowrap;
}

.page-about .about-layers__table tbody tr:hover th,
.page-about .about-layers__table tbody tr:hover td {
  background: rgba(59, 255, 154, .08);
  color: var(--paper);
}

.page-about .about-layers__table .num {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  color: var(--amber);
}

.page-about .about-layers__note {
  margin: 26px 0 0;
  max-width: 44em;
  padding-left: 16px;
  border-left: 2px solid var(--legacy);
  font-size: .9375rem;
  line-height: 1.85;
  color: var(--silver);
}

/* ---------- 收束 ---------- */
.page-about .about-close {
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-deep) 100%);
}

.page-about .about-close__inner {
  position: relative;
}

.page-about .about-close__annot {
  margin: 0 0 14px;
  color: var(--green);
  letter-spacing: .26em;
}

.page-about .about-close__line {
  margin: 0 0 30px;
  max-width: 26ch;
  font-size: clamp(1.25rem, 3.8vw, 1.9rem);
  line-height: 1.5;
  color: var(--paper);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero {
    padding: calc(var(--header-h) + 64px) 0 clamp(64px, 7vw, 92px);
  }

  .page-about .about-hero__rot {
    display: block;
  }

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

  .page-about .about-tree__groups::before {
    content: "";
    position: absolute;
    top: -15px;
    left: 16.6%;
    right: 16.6%;
    height: 1px;
    background: rgba(11, 27, 43, .24);
  }

  .page-about .about-group::before {
    top: -15px;
    height: 14px;
  }
}

@media (min-width: 960px) {
  .page-about .about-origin__body {
    grid-template-columns: 6fr 5fr;
    gap: clamp(34px, 5vw, 66px);
    align-items: start;
  }

  .page-about .about-origin__figure {
    margin-top: 44px;
  }

  .page-about .about-team__body {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }

  .page-about .about-region__body {
    grid-template-columns: 7fr 5fr;
    align-items: center;
    gap: clamp(30px, 4vw, 52px);
  }

  .page-about .about-years__item {
    grid-template-columns: 120px minmax(0, 1fr);
    align-items: start;
    gap: 0 26px;
    padding-top: 24px;
    padding-bottom: 24px;
  }

  .page-about .about-years__item::before {
    top: 31px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-ghost {
    transform: none;
    transition: none;
  }

  .page-about .about-group,
  .page-about .about-group::before,
  .page-about .about-region__item,
  .page-about .about-jump__chip,
  .page-about .about-years__item::before {
    transition: none;
  }
}
<<<END>>>