/* ===== 品牌价值主张页 · page-about ===== */
.page-about {
  --ab-line-soft: rgba(31, 111, 139, 0.22);
  --ab-tick: rgba(17, 20, 24, 0.35);
  background-color: var(--hp-paper);
  color: var(--hp-ink);
  font-family: var(--hp-sans);
  overflow-x: clip;
}

.page-about .hp-section {
  padding-block: 56px;
}

@media (min-width: 900px) {
  .page-about .hp-section {
    padding-block: 88px;
  }
}

.page-about .hp-breadcrumb {
  padding-top: 18px;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding-block: 22px 56px;
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--ab-line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--ab-line-soft) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
}

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

.page-about .ab-hero__grid {
  display: grid;
  gap: 32px;
  align-items: start;
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: 56px;
  }

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

.page-about .ab-hero__title {
  margin: 14px 0 0;
  font-size: clamp(2rem, 8vw, 4.35rem);
  line-height: 1.04;
  font-weight: 900;
  letter-spacing: -0.03em;
  max-width: 15ch;
}

.page-about .ab-hero__lead .hp-lede {
  margin-top: 22px;
  max-width: 58ch;
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.page-about .ab-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 38px 0 0;
  padding: 0;
  background-color: var(--hp-line-hard);
  border: 2px solid var(--hp-ink);
  box-shadow: var(--hp-shadow);
}

@media (min-width: 640px) {
  .page-about .ab-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .ab-fact {
  background-color: var(--hp-white);
  padding: 14px 16px 16px;
}

.page-about .ab-fact dt {
  font-family: var(--hp-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--hp-slate);
}

.page-about .ab-fact dd {
  margin: 6px 0 0;
  font-size: 23px;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--hp-sky);
}

.page-about .ab-hero__figure {
  margin: 0;
}

.page-about .ab-hero__figure .hp-media__img {
  background: linear-gradient(135deg, var(--hp-sky-soft), rgba(31, 111, 139, 0.14));
}

/* ---------- 刻度尺 ---------- */
.page-about .ab-ruler {
  list-style: none;
  margin: 46px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  border-top: 2px solid var(--hp-ink);
  border-bottom: 2px solid var(--hp-ink);
}

@media (min-width: 760px) {
  .page-about .ab-ruler {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .ab-ruler__item {
  position: relative;
  padding: 20px 16px 22px 18px;
  border-left: 1px solid var(--hp-line);
  transition: background-color 0.2s var(--hp-ease);
}

.page-about .ab-ruler__item:first-child {
  border-left: 0;
}

.page-about .ab-ruler__item::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 0;
  width: 2px;
  height: 12px;
  background: var(--hp-sky);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.24s var(--hp-ease);
}

.page-about .ab-ruler__item:hover {
  background-color: var(--hp-sky-soft);
}

.page-about .ab-ruler__item:hover::before {
  transform: scaleY(1);
}

.page-about .ab-ruler__no {
  display: inline-block;
  font-family: var(--hp-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--hp-ink-blue);
  background: var(--hp-orange);
  padding: 3px 9px;
}

.page-about .ab-ruler__label {
  display: block;
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--hp-slate);
  max-width: 26ch;
}

/* ---------- 服务对象 ---------- */
.page-about .ab-who__grid {
  margin-top: 40px;
  gap: 26px;
}

.page-about .ab-who__card {
  padding: 26px 24px 28px;
  border: 2px solid var(--hp-ink);
  background: var(--hp-white);
  box-shadow: var(--hp-shadow);
  transition: box-shadow 0.2s var(--hp-ease), transform 0.2s var(--hp-ease);
}

.page-about .ab-who__card:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--hp-shadow-sky);
}

@media (min-width: 900px) {
  .page-about .ab-who__card:nth-child(2) {
    transform: translateY(14px);
  }

  .page-about .ab-who__card:nth-child(2):hover {
    transform: translate(-2px, 12px);
  }
}

.page-about .ab-who__card .hp-card__meta {
  margin: 0;
}

.page-about .ab-who__card .hp-card__title {
  margin: 10px 0 16px;
  font-size: 22px;
  line-height: 1.32;
  font-weight: 900;
  letter-spacing: -0.02em;
}

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

.page-about .ab-list li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--hp-ink);
}

.page-about .ab-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 13px;
  width: 12px;
  height: 2px;
  background: var(--hp-sky);
}

.page-about .ab-list a {
  color: var(--hp-sky);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  transition: color 0.2s var(--hp-ease);
}

.page-about .ab-list a:hover {
  color: var(--hp-saffron);
}

.page-about .ab-note {
  margin: 34px 0 0;
  padding: 16px 20px;
  border-left: 4px solid var(--hp-orange);
  background: var(--hp-sky-soft);
  font-size: 15px;
  line-height: 1.8;
  color: var(--hp-ink);
  max-width: 72ch;
}

/* ---------- 成长历程 ---------- */
.page-about .ab-timeline__layout {
  margin-top: 44px;
  display: grid;
  gap: 40px;
}

@media (min-width: 980px) {
  .page-about .ab-timeline__layout {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.55fr);
    gap: 56px;
    align-items: start;
  }
}

.page-about .ab-timeline {
  list-style: none;
  margin: 0;
  padding: 4px 0 4px 28px;
  border-left: 2px solid var(--hp-ink);
  display: grid;
  gap: 32px;
}

.page-about .ab-timeline__item {
  position: relative;
}

.page-about .ab-timeline__item::before {
  content: "";
  position: absolute;
  left: -36px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--hp-paper);
  border: 2px solid var(--hp-sky);
  transition: background-color 0.2s var(--hp-ease), border-color 0.2s var(--hp-ease);
}

.page-about .ab-timeline__item:hover::before {
  background: var(--hp-orange);
  border-color: var(--hp-orange);
}

.page-about .ab-timeline__no {
  display: inline-block;
  font-family: var(--hp-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--hp-sky);
  background: var(--hp-sky-soft);
  border: 1px solid var(--hp-line);
  padding: 2px 9px;
}

.page-about .ab-timeline__title {
  margin: 10px 0 8px;
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.35;
}

.page-about .ab-timeline__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--hp-slate);
  max-width: 62ch;
}

.page-about .ab-chart {
  margin: 0;
  padding: 20px 18px 14px;
  background: var(--hp-white);
  border: 2px solid var(--hp-ink);
  box-shadow: var(--hp-shadow);
}

.page-about .ab-chart svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .ab-chart figcaption {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--hp-line);
  font-family: var(--hp-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--hp-slate);
}

/* ---------- 团队与走访 ---------- */
.page-about .ab-team {
  margin-top: 40px;
  display: grid;
  gap: 34px;
}

@media (min-width: 980px) {
  .page-about .ab-team {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }
}

.page-about .ab-team__figure {
  margin: 0;
}

.page-about .ab-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--hp-ink);
}

.page-about .ab-flow__step {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  grid-template-areas:
    "no title"
    "no text";
  gap: 2px 16px;
  padding: 18px 0 20px;
  border-bottom: 1px solid var(--hp-line-hard);
}

.page-about .ab-flow__no {
  grid-area: no;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  font-family: var(--hp-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--hp-orange);
  background: var(--hp-ink-blue);
}

.page-about .ab-flow__title {
  grid-area: title;
  margin: 6px 0 0;
  font-size: 17px;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.page-about .ab-flow__step p {
  grid-area: text;
  margin: 2px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--hp-slate);
}

/* ---------- 选购参考 ---------- */
.page-about .ab-band {
  background-color: var(--hp-sky-soft);
  border-top: 2px solid var(--hp-ink);
  border-bottom: 2px solid var(--hp-ink);
}

.page-about .ab-guide {
  margin-top: 40px;
  display: grid;
  gap: 28px;
}

@media (min-width: 940px) {
  .page-about .ab-guide {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }
}

.page-about .ab-guide__accordion {
  background: var(--hp-white);
  border: 2px solid var(--hp-ink);
  box-shadow: var(--hp-shadow);
}

.page-about .ab-guide__accordion .hp-accordion__item + .hp-accordion__item {
  border-top: 1px solid var(--hp-line-hard);
}

.page-about .ab-guide__accordion .hp-accordion__item h3 {
  margin: 0;
}

.page-about .ab-guide__accordion .hp-accordion__trigger {
  width: 100%;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 20px 22px;
  margin: 0;
  background: transparent;
  border: 0;
  text-align: left;
  font-family: inherit;
  font-size: 17px;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--hp-ink);
  cursor: pointer;
  transition: background-color 0.2s var(--hp-ease), color 0.2s var(--hp-ease);
}

.page-about .ab-guide__accordion .hp-accordion__trigger:hover,
.page-about .ab-guide__accordion .hp-accordion__trigger[aria-expanded="true"] {
  background-color: var(--hp-sky-soft);
  color: var(--hp-sky);
}

.page-about .ab-guide__accordion .hp-accordion__panel {
  padding: 0 22px 22px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--hp-slate);
}

.page-about .ab-guide__accordion .hp-accordion__panel p {
  margin: 0;
}

.page-about .ab-guide__accordion .hp-accordion__panel a {
  color: var(--hp-sky);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-about .ab-step-no {
  flex: none;
  font-family: var(--hp-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--hp-ink-blue);
  background: var(--hp-orange);
  padding: 3px 8px;
}

.page-about .ab-guide__aside {
  padding: 26px 24px 28px;
  background: var(--hp-ink-blue);
  color: var(--hp-white);
  border: 2px solid var(--hp-ink);
  box-shadow: var(--hp-shadow-sky);
}

.page-about .ab-guide__aside-no {
  margin: 0 0 12px;
  font-family: var(--hp-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--hp-orange);
}

.page-about .ab-guide__aside h3 {
  margin: 0 0 12px;
  font-size: 21px;
  line-height: 1.32;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.page-about .ab-guide__aside p {
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--hp-on-dark);
}

/* ---------- 协作与覆盖 ---------- */
.page-about .ab-eco {
  margin-top: 40px;
  display: grid;
  gap: 34px;
}

@media (min-width: 980px) {
  .page-about .ab-eco {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 52px;
    align-items: center;
  }
}

.page-about .ab-eco__text p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--hp-ink);
  max-width: 60ch;
}

.page-about .ab-eco__stats {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .ab-eco__stats li {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 16px;
  align-items: baseline;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--hp-line);
}

.page-about .ab-eco__num {
  font-family: var(--hp-mono);
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--hp-sky);
}

.page-about .ab-eco__label {
  font-size: 14px;
  line-height: 1.7;
  color: var(--hp-slate);
}

.page-about .ab-eco__figure {
  margin: 0;
}

/* ---------- 为什么是我们 ---------- */
.page-about .ab-why {
  background-color: var(--hp-white);
  border-top: 1px solid var(--hp-line);
}

.page-about .ab-why__grid {
  margin-top: 40px;
  gap: 22px;
}

.page-about .ab-why__card {
  padding: 24px 22px 26px;
  background: var(--hp-paper);
  border: 2px solid var(--hp-ink);
  box-shadow: var(--hp-shadow);
  transition: box-shadow 0.2s var(--hp-ease), transform 0.2s var(--hp-ease);
}

.page-about .ab-why__card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 10px 10px 0 var(--hp-orange);
}

.page-about .ab-why__no {
  display: inline-block;
  margin: 0;
  padding: 2px 9px;
  font-family: var(--hp-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--hp-sky);
  background: var(--hp-sky-soft);
}

.page-about .ab-why__card h3 {
  margin: 14px 0 10px;
  font-size: 19px;
  line-height: 1.35;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.page-about .ab-why__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--hp-slate);
}

.page-about .ab-why__actions {
  margin-top: 42px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about .ab-why__foot {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--hp-slate);
}

.page-about .ab-why__foot a {
  color: var(--hp-sky);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-about .ab-why__foot a:hover {
  color: var(--hp-saffron);
}

/* ---------- 图片响应式兜底 ---------- */
.page-about .hp-media__img {
  background: linear-gradient(135deg, var(--hp-sky-soft), rgba(31, 111, 139, 0.16));
  overflow: hidden;
}

.page-about .hp-media__img img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 小屏收口 ---------- */
@media (max-width: 560px) {
  .page-about .ab-hero__title {
    font-size: 2rem;
    max-width: none;
  }

  .page-about .ab-ruler__item {
    padding-right: 12px;
  }

  .page-about .ab-eco__stats li {
    grid-template-columns: 66px minmax(0, 1fr);
    gap: 12px;
  }

  .page-about .ab-eco__num {
    font-size: 24px;
  }

  .page-about .ab-timeline {
    padding-left: 20px;
  }

  .page-about .ab-timeline__item::before {
    left: -28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
  }
}