/* ===== 品牌概况页 · page-about ===== */

.page-about {
  --about-rail-w: 178px;
  --about-flow-gap: clamp(20px, 3vw, 40px);
  --about-max-text: 64ch;
}

.page-about .breadcrumb {
  padding-top: clamp(16px, 2.6vw, 28px);
}

/* ---- 首屏 ---- */

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(16px, 2.6vw, 30px) 0 clamp(36px, 6vw, 72px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -34%;
  right: -16%;
  width: min(660px, 80vw);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 50% 50%, rgba(182, 255, 60, .16), rgba(182, 255, 60, 0) 62%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  margin-top: clamp(18px, 3vw, 34px);
}

.page-about .about-hero h1 {
  margin: .3em 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 7.4vw, 76px);
  line-height: .98;
  letter-spacing: -.02em;
  color: var(--mist);
  transform: skewX(-2deg);
}

.page-about .about-hero h1 em {
  font-style: normal;
  color: var(--lime);
}

.page-about .about-hero__deck {
  max-width: 52ch;
  margin: clamp(16px, 2.2vw, 24px) 0 0;
  font-size: clamp(16px, 1.8vw, 18px);
  line-height: 1.78;
  color: var(--slate);
}

.page-about .about-board {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-organic);
  background: linear-gradient(160deg, var(--charcoal) 0%, var(--steel) 100%);
  padding: clamp(18px, 2.4vw, 26px);
}

.page-about .about-board::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: .2;
  pointer-events: none;
}

.page-about .about-board__label {
  position: relative;
  z-index: 1;
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--lime);
}

.page-about .about-board__stats {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 14px;
  margin: 0;
}

.page-about .about-board__stat {
  border-left: 2px solid var(--lime);
  padding-left: 10px;
  min-width: 0;
}

.page-about .about-board__stat dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.4vw, 38px);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--mist);
}

.page-about .about-board__stat dt {
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.5;
  letter-spacing: .06em;
  color: var(--slate);
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: end;
  }
}

/* ---- 发展节点 ---- */

.page-about .about-era__body {
  display: grid;
  gap: var(--about-flow-gap);
  margin-top: clamp(20px, 3vw, 34px);
}

.page-about .about-rail__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--slate-dim);
}

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px;
  border-left: 2px solid transparent;
  color: var(--slate);
  text-decoration: none;
  white-space: nowrap;
  transition:
    color .16s var(--ease),
    border-color .16s var(--ease),
    background-color .16s var(--ease),
    transform .16s var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--lime);
  border-left-color: var(--lime);
  background: rgba(182, 255, 60, .07);
  transform: translateX(4px);
}

.page-about .about-rail__year {
  font-size: 15px;
  letter-spacing: .06em;
  color: inherit;
}

.page-about .about-rail__tag {
  font-size: 12.5px;
  color: var(--slate-dim);
}

.page-about .about-era__flow {
  min-width: 0;
}

.page-about .about-era__item {
  position: relative;
  padding: 0 0 clamp(28px, 4vw, 44px) clamp(18px, 2.6vw, 28px);
  border-left: 1px solid var(--line);
  transition: transform .16s var(--ease);
}

.page-about .about-era__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
  background-image: linear-gradient(180deg, var(--line), rgba(46, 61, 82, 0) 78%);
  background-size: 1px 100%;
  background-repeat: no-repeat;
  background-position: left top;
}

.page-about .about-era__item::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 12px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(182, 255, 60, .12);
}

.page-about .about-era__year {
  display: block;
  font-size: clamp(26px, 4.6vw, 40px);
  line-height: 1;
  letter-spacing: .06em;
  color: var(--lime);
}

.page-about .about-era__title {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.4vw, 26px);
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-about .about-era__text {
  max-width: var(--about-max-text);
  margin: 0 0 10px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--slate);
}

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

.page-about .about-era__body:has(.about-rail__link[href="#era-2019"]:hover) #era-2019,
.page-about .about-era__body:has(.about-rail__link[href="#era-2019"]:focus-visible) #era-2019,
.page-about .about-era__body:has(.about-rail__link[href="#era-2021"]:hover) #era-2021,
.page-about .about-era__body:has(.about-rail__link[href="#era-2021"]:focus-visible) #era-2021,
.page-about .about-era__body:has(.about-rail__link[href="#era-2023"]:hover) #era-2023,
.page-about .about-era__body:has(.about-rail__link[href="#era-2023"]:focus-visible) #era-2023,
.page-about .about-era__body:has(.about-rail__link[href="#era-now"]:hover) #era-now,
.page-about .about-era__body:has(.about-rail__link[href="#era-now"]:focus-visible) #era-now {
  transform: translateX(6px);
}

@media (min-width: 900px) {
  .page-about .about-era__body {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 96px;
  }

  .page-about .about-rail__list {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
    padding: 0;
    overflow: visible;
  }

  .page-about .about-rail__link {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
  }
}

/* ---- 团队与分工 ---- */

.page-about .about-team__grid {
  display: grid;
  gap: clamp(24px, 3.6vw, 44px);
  margin-top: clamp(20px, 3vw, 34px);
}

.page-about .about-roles {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-role {
  border-bottom: 1px solid var(--line);
}

.page-about .about-role__sum {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 4px;
  cursor: pointer;
  list-style: none;
  color: var(--mist);
  transition: color .16s var(--ease), padding-left .16s var(--ease), background-color .16s var(--ease);
}

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

.page-about .about-role__sum:hover,
.page-about .about-role__sum:focus-visible {
  color: var(--lime);
  padding-left: 12px;
  background: rgba(182, 255, 60, .05);
}

.page-about .about-role__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 20px);
}

.page-about .about-role__num {
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--lime);
  white-space: nowrap;
}

.page-about .about-role__desc {
  max-width: 60ch;
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.76;
  color: var(--slate);
}

@media (min-width: 960px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    align-items: start;
  }
}

/* ---- 集锦三道工序 ---- */

.page-about .about-cut__steps {
  display: grid;
  gap: clamp(18px, 2.6vw, 30px);
  margin: clamp(20px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-cut__step {
  padding-top: 20px;
  border-top: 2px solid var(--lime);
}

.page-about .about-cut__step:nth-child(2) {
  border-top-color: var(--amber);
}

.page-about .about-cut__step:nth-child(3) {
  border-top-color: var(--orange);
}

.page-about .about-cut__num {
  display: block;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--slate-dim);
}

.page-about .about-cut__name {
  display: block;
  margin: 10px 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.6vw, 27px);
  color: var(--mist);
}

.page-about .about-cut__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--slate);
}

.page-about .about-cut__meter {
  display: inline-block;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 8px 14px;
  border: 1px dashed var(--blueprint);
  border-radius: var(--radius-soft);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--lime);
}

.page-about .about-cut__media {
  margin-top: clamp(20px, 3vw, 32px);
}

@media (min-width: 760px) {
  .page-about .about-cut__steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---- 覆盖版图 ---- */

.page-about .about-map__grid {
  display: grid;
  gap: clamp(22px, 3vw, 38px);
  margin-top: clamp(20px, 3vw, 34px);
}

.page-about .about-map__bars {
  display: grid;
  gap: 22px;
  align-content: start;
}

.page-about .about-map__bar-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.page-about .about-map__bar-label {
  font-size: 15px;
  color: var(--mist);
}

.page-about .about-map__bar-value {
  font-size: 15px;
  letter-spacing: .08em;
  color: var(--amber);
  white-space: nowrap;
}

.page-about .about-map__note {
  margin: 4px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--blueprint);
  font-size: 15px;
  line-height: 1.76;
  color: var(--slate);
}

@media (min-width: 900px) {
  .page-about .about-map__grid {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    align-items: center;
  }
}

/* ---- 每周节奏 ---- */

.page-about .about-week__grid {
  display: grid;
  gap: 1px;
  margin-top: clamp(20px, 3vw, 32px);
  border: 1px solid var(--line);
  border-radius: var(--radius-soft);
  background: var(--line);
  overflow: hidden;
}

.page-about .about-week__cell {
  padding: clamp(18px, 2.6vw, 28px);
  background: var(--charcoal);
}

.page-about .about-week__num {
  display: block;
  font-size: clamp(30px, 5.4vw, 48px);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--lime);
}

.page-about .about-week__cell:nth-child(2) .about-week__num {
  color: var(--amber);
}

.page-about .about-week__cell:nth-child(3) .about-week__num {
  color: var(--orange);
}

.page-about .about-week__cap {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--slate);
}

.page-about .about-week__text {
  max-width: 68ch;
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--slate);
}

@media (min-width: 640px) {
  .page-about .about-week__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---- 黑龙江本地入口 ---- */

.page-about .about-local__panel {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(182, 255, 60, .28);
  border-radius: var(--radius-organic);
  background:
    linear-gradient(135deg, rgba(182, 255, 60, .13), rgba(7, 13, 27, 0) 58%),
    var(--charcoal);
  padding: clamp(24px, 4vw, 50px);
}

.page-about .about-local__panel::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -90px;
  width: clamp(180px, 30vw, 280px);
  aspect-ratio: 1 / 1;
  border-radius: 42% 58% 55% 45% / 48% 42% 58% 52%;
  background: radial-gradient(circle at 40% 40%, rgba(182, 255, 60, .24), rgba(182, 255, 60, 0) 70%);
  pointer-events: none;
}

.page-about .about-local__title {
  position: relative;
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.4vw, 38px);
  line-height: 1.15;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-about .about-local__text {
  position: relative;
  max-width: 62ch;
  margin: clamp(14px, 2vw, 20px) 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .about-local__actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 2.8vw, 30px);
}

/* ---- 结尾指引 ---- */

.page-about .about-next {
  border-top: 1px solid var(--line);
}

.page-about .about-next__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.2vw, 36px);
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-about .about-next__text {
  max-width: 62ch;
  margin: clamp(12px, 1.8vw, 18px) 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--slate);
}

.page-about .about-next__row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 2.8vw, 28px);
}

/* ---- 窄屏兜底 ---- */

@media (max-width: 620px) {
  .page-about .about-board__stats {
    gap: 14px 12px;
  }

  .page-about .about-rail__link {
    padding: 8px 10px;
  }

  .page-about .about-role__sum {
    padding: 12px 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__link,
  .page-about .about-era__item,
  .page-about .about-role__sum {
    transition: none;
  }
}