/* ===== 品牌与日常 · 页面专属样式 ===== */
.page-about {
  --ab-rule-line: rgba(140, 143, 134, .32);
  --ab-soft-line: rgba(168, 191, 178, .62);
  background: var(--lx-cream);
  color: var(--lx-ink);
  overflow-x: clip;
}

/* — 首屏 — */
.page-about .ab-hero {
  position: relative;
  padding: clamp(20px, 4vw, 42px) 0 clamp(46px, 7vw, 92px);
  overflow: hidden;
}
.page-about .ab-hero__wrap {
  position: relative;
  z-index: 2;
}
.page-about .ab-hero__inner {
  max-width: 620px;
}
.page-about .ab-hero__title {
  margin: 12px 0 18px;
  font-family: var(--lx-font-head);
  font-weight: 900;
  font-size: clamp(30px, 6.4vw, 46px);
  line-height: 1.18;
  letter-spacing: -.02em;
  color: var(--lx-green-900);
}
.page-about .ab-hero__lede {
  margin: 0;
  max-width: 34em;
  font-family: var(--lx-font-body);
  font-size: clamp(16.5px, 1.6vw, 19px);
  line-height: 1.9;
  color: rgba(30, 33, 29, .88);
}
.page-about .ab-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--lx-yellow) 0 22%, var(--lx-green-300) 22% 100%);
  transform: skewY(-1.2deg);
  transform-origin: left center;
}
@media (min-width: 900px) {
  .page-about .ab-hero {
    padding-bottom: clamp(64px, 8vw, 112px);
  }
  .page-about .ab-hero::before {
    content: "";
    position: absolute;
    top: -14%;
    right: 0;
    width: min(46%, 480px);
    height: 128%;
    background-image:
      linear-gradient(90deg, var(--lx-yellow) 0 10px, rgba(242, 193, 78, 0) 10px),
      linear-gradient(152deg, var(--lx-green-600), var(--lx-green-900) 72%);
    border-radius: 40px;
    transform: rotate(-7deg);
    z-index: 1;
  }
}

/* — 规模数字带 — */
.page-about .ab-facts-band {
  background: var(--lx-green-900);
  padding: clamp(22px, 3.4vw, 38px) 0;
}
.page-about .ab-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(168, 191, 178, .34);
  border-radius: var(--lx-r-md);
  overflow: hidden;
}
.page-about .ab-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--lx-green-900);
  padding: clamp(14px, 2vw, 20px) clamp(14px, 2vw, 22px);
}
.page-about .ab-fact__num {
  font-family: var(--lx-font-mono);
  font-size: clamp(24px, 3.6vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--lx-yellow);
}
.page-about .ab-fact__num small {
  font-size: .52em;
  margin-left: 2px;
}
.page-about .ab-fact__label {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--lx-green-300);
}
@media (min-width: 760px) {
  .page-about .ab-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* — 主体与手卷式分栏 — */
.page-about .ab-body {
  padding-top: clamp(28px, 5vw, 56px);
  padding-bottom: clamp(40px, 6vw, 80px);
}
.page-about .ab-thread {
  position: relative;
}
.page-about .ab-thread::before {
  content: "";
  position: absolute;
  left: 0;
  top: -6px;
  bottom: -6px;
  width: 3px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--lx-green-600), var(--lx-green-300) 58%, rgba(168, 191, 178, 0));
  opacity: .5;
  transform: rotate(.7deg);
  transform-origin: top left;
  pointer-events: none;
}

.page-about .ab-rail {
  display: none;
}
.page-about .ab-rail__num,
.page-about .ab-rail__label {
  font-family: var(--lx-font-mono);
  font-size: 12px;
  letter-spacing: .05em;
}
.page-about .ab-rail__label {
  font-family: var(--lx-font-head);
}
.page-about .ab-rail .lx-anchor-nav__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 10px 6px 12px;
  border-radius: var(--lx-r-sm);
  border-left: 2px solid transparent;
  color: var(--lx-index);
  text-decoration: none;
  transition: background-color .18s var(--lx-ease), color .18s var(--lx-ease);
}
.page-about .ab-rail .lx-anchor-nav__link:hover {
  background: rgba(168, 191, 178, .28);
  color: var(--lx-green-900);
}
.page-about .ab-rail .lx-anchor-nav__link[aria-current="true"] {
  background: var(--lx-yellow);
  color: var(--lx-green-900);
  border-left-color: var(--lx-green-900);
}
@media (min-width: 1100px) {
  .page-about .ab-body {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 104px;
    column-gap: clamp(20px, 3vw, 40px);
    align-items: start;
  }
  .page-about .ab-rail {
    display: flex;
    flex-direction: column;
    gap: 4px;
    position: sticky;
    top: 110px;
    align-self: start;
  }
}

/* — 章节 — */
.page-about .ab-section {
  padding: clamp(34px, 5.5vw, 68px) 0;
}
.page-about .ab-section:first-child {
  padding-top: clamp(18px, 3vw, 32px);
}
.page-about .ab-section__grid {
  display: grid;
  gap: clamp(16px, 3vw, 28px);
}
.page-about .ab-section__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  height: 34px;
  padding: 0 14px;
  border-radius: 999px;
  background: var(--lx-green-900);
  color: var(--lx-yellow);
  font-family: var(--lx-font-mono);
  font-size: 15px;
  letter-spacing: .08em;
}
.page-about .ab-section__title {
  margin: 14px 0 8px;
  font-family: var(--lx-font-head);
  font-weight: 800;
  font-size: clamp(21px, 3.4vw, 28px);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--lx-green-900);
}
.page-about .ab-section__meta {
  margin: 0;
  font-family: var(--lx-font-mono);
  font-size: 12.5px;
  letter-spacing: .03em;
  color: var(--lx-index);
}
.page-about .ab-p {
  margin: 0 0 1.05em;
  max-width: 62ch;
  font-family: var(--lx-font-body);
  font-size: clamp(16px, 1.5vw, 17.5px);
  line-height: 1.9;
  color: var(--lx-ink);
}
.page-about .ab-p:last-child {
  margin-bottom: 0;
}
@media (min-width: 880px) {
  .page-about .ab-section__grid {
    grid-template-columns: minmax(0, 34%) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 64px);
  }
  .page-about .ab-section__head {
    position: sticky;
    top: 104px;
    align-self: start;
  }
  .page-about .ab-section__body {
    border-left: 1px solid var(--ab-soft-line);
    padding-left: clamp(24px, 3vw, 48px);
  }
}

/* — 图片 — */
.page-about .ab-figure {
  margin: clamp(22px, 3.4vw, 36px) 0 0;
}
.page-about .ab-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--lx-r-md);
  box-shadow: var(--lx-shadow-card);
}
.page-about .ab-figure--square img {
  border-radius: var(--lx-r-lg);
}
.page-about .ab-figure__cap {
  margin-top: 10px;
  font-family: var(--lx-font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--lx-index);
}

/* — 服务半径示意图 — */
.page-about .ab-map-wrap {
  margin: clamp(22px, 3.4vw, 36px) 0 0;
  padding: clamp(14px, 2vw, 24px);
  background: var(--lx-paper);
  border: 1px solid var(--ab-soft-line);
  border-radius: var(--lx-r-lg);
}
.page-about .ab-map {
  display: block;
  width: 100%;
  height: auto;
}
.page-about .ab-map__rings circle {
  fill: none;
  stroke: var(--lx-green-300);
  stroke-width: 1.4;
  stroke-dasharray: 5 7;
}
.page-about .ab-map__rings circle:first-child {
  stroke: var(--lx-green-600);
  stroke-dasharray: none;
  stroke-width: 1.6;
}
.page-about .ab-map__rings circle:last-child {
  stroke-dasharray: 2 9;
  opacity: .7;
}
.page-about .ab-map__city circle {
  fill: var(--lx-green-600);
  transition: fill .18s var(--lx-ease);
}
.page-about .ab-map__city--origin circle {
  fill: var(--lx-yellow);
  stroke: var(--lx-green-900);
  stroke-width: 2.5;
}
.page-about .ab-map__city text {
  font-family: var(--lx-font-mono);
  font-size: 14px;
  fill: var(--lx-green-900);
}
.page-about .ab-map__city .ab-map__tip {
  font-size: 12px;
  fill: var(--lx-index);
  opacity: 0;
  transition: opacity .18s var(--lx-ease);
}
.page-about .ab-map__city:hover .ab-map__tip,
.page-about .ab-map__city:focus .ab-map__tip {
  opacity: 1;
}
.page-about .ab-map__city:focus {
  outline: none;
}
.page-about .ab-map__city:focus-visible circle {
  stroke: var(--lx-yellow);
  stroke-width: 3;
}
.page-about .ab-legend {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--lx-index);
}
.page-about .ab-legend li {
  display: flex;
  align-items: center;
  gap: 10px;
}
.page-about .ab-legend__dot {
  flex: none;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 1.5px solid var(--lx-green-600);
}
.page-about .ab-legend__dot--origin {
  background: var(--lx-yellow);
  border-color: var(--lx-green-900);
  border-width: 2px;
}
.page-about .ab-legend__dot--dash {
  border-style: dashed;
  border-color: var(--lx-green-300);
}
.page-about .ab-legend__dot--far {
  border-style: dotted;
  border-color: var(--lx-index);
}

/* — 四条准则 — */
.page-about .ab-rules {
  margin-top: clamp(16px, 2.4vw, 26px);
}
.page-about .ab-rule {
  border-top: 1px solid var(--ab-rule-line);
}
.page-about .ab-rule:last-of-type {
  border-bottom: 1px solid var(--ab-rule-line);
}
.page-about .ab-rule__title {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 15px 4px;
  cursor: pointer;
  list-style: none;
  font-family: var(--lx-font-head);
  font-weight: 700;
  font-size: 17px;
  color: var(--lx-green-900);
}
.page-about .ab-rule__title::-webkit-details-marker {
  display: none;
}
.page-about .ab-rule__title::after {
  content: "+";
  margin-left: auto;
  font-family: var(--lx-font-mono);
  font-size: 18px;
  color: var(--lx-index);
  transition: transform .18s var(--lx-ease), color .18s var(--lx-ease);
}
.page-about .ab-rule[open] .ab-rule__title::after {
  content: "−";
  color: var(--lx-brick);
}
.page-about .ab-rule__title:hover::after {
  color: var(--lx-green-900);
}
.page-about .ab-rule__title:focus-visible {
  outline: 2px solid var(--lx-yellow);
  outline-offset: 2px;
}
.page-about .ab-rule__idx {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: var(--lx-yellow-soft);
  color: var(--lx-green-900);
  font-family: var(--lx-font-mono);
  font-size: 13px;
  transform: rotate(-3deg);
}
.page-about .ab-rule__body {
  padding: 0 4px 18px 44px;
}
.page-about .ab-rule__body .ab-p {
  font-size: 16px;
  color: rgba(30, 33, 29, .86);
}

/* — 下一步 — */
.page-about .ab-next-band {
  padding: 0 var(--lx-gutter) clamp(40px, 6vw, 72px);
}
.page-about .ab-next {
  background: var(--lx-green-900);
  border-radius: var(--lx-r-lg);
  padding: clamp(26px, 4.4vw, 52px);
}
.page-about .ab-next__title {
  margin: 0 0 12px;
  font-family: var(--lx-font-head);
  font-weight: 800;
  font-size: clamp(22px, 3.6vw, 30px);
  line-height: 1.3;
  color: var(--lx-paper);
}
.page-about .ab-next__lede {
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 46em;
  font-family: var(--lx-font-body);
  font-size: clamp(15.5px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--lx-green-300);
}
.page-about .ab-next__lede a {
  color: var(--lx-yellow);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-about .ab-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(168, 191, 178, .28);
  border-radius: var(--lx-r-md);
  overflow: hidden;
}
.page-about .ab-next__link {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: clamp(14px, 2vw, 20px) clamp(16px, 2vw, 24px);
  background: var(--lx-green-900);
  text-decoration: none;
  transition: background-color .18s var(--lx-ease), transform .18s var(--lx-ease);
}
.page-about .ab-next__link:hover {
  background: #263e34;
  transform: translateY(-2px);
}
.page-about .ab-next__link:focus-visible {
  outline: 2px solid var(--lx-yellow);
  outline-offset: -2px;
}
.page-about .ab-next__k {
  font-family: var(--lx-font-head);
  font-weight: 700;
  font-size: 17px;
  color: var(--lx-yellow);
}
.page-about .ab-next__v {
  font-family: var(--lx-font-body);
  font-size: 15px;
  line-height: 1.7;
  color: var(--lx-green-300);
}
@media (min-width: 780px) {
  .page-about .ab-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (min-width: 1180px) {
  .page-about .ab-next__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-map__city circle,
  .page-about .ab-map__city .ab-map__tip,
  .page-about .ab-rail .lx-anchor-nav__link,
  .page-about .ab-next__link,
  .page-about .ab-rule__title::after {
    transition: none;
  }
  .page-about .ab-next__link:hover {
    transform: none;
  }
}