/* ===== 品牌概况页 · page-about ===== */
.page-about {
  --about-pad: clamp(58px, 8vw, 108px);
  --about-line: rgba(201, 214, 210, 0.34);
  display: block;
  background: var(--paper);
  color: var(--ink);
}

.page-about h2 {
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1.26;
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}

.page-about h3 {
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.4;
  margin: 0 0 10px;
}

.page-about p {
  margin: 0 0 14px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 88% 6%, rgba(61, 224, 208, 0.15) 0%, rgba(61, 224, 208, 0) 58%),
    linear-gradient(158deg, var(--deep) 0%, var(--ink) 100%);
  color: var(--text);
  padding: clamp(30px, 5.5vw, 66px) 0 var(--about-pad);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(61, 224, 208, 0.05) 1px, transparent 1px);
  background-size: 100% 72px;
  pointer-events: none;
}

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

.page-about .about-hero__crumb {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-dim);
  margin-bottom: clamp(24px, 4vw, 46px);
}

.page-about .about-hero__crumb a {
  color: var(--text-mute);
  text-decoration: none;
}

.page-about .about-hero__crumb a:hover {
  color: var(--cyan);
}

.page-about .about-hero__crumb .breadcrumb__sep {
  margin: 0 8px;
  color: var(--text-dim);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(30px, 4vw, 62px);
  align-items: end;
}

.page-about .about-hero__kicker {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  margin-bottom: 16px;
}

.page-about .about-hero h1 {
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: clamp(30px, 5.6vw, 48px);
  line-height: 1.24;
  letter-spacing: -0.015em;
  margin: 0 0 20px;
  max-width: 18em;
}

.page-about .about-hero__text {
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.9;
  color: var(--text-mute);
  max-width: 40em;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
  margin: 26px 0 0;
}

.page-about .about-hero__cta {
  text-decoration: none;
}

.page-about .about-hero__link {
  position: relative;
  color: var(--text);
  font-size: 14px;
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 1px solid var(--hairline-strong);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .about-hero__link:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}

.page-about .about-hero__figure {
  margin-top: clamp(30px, 4.5vw, 48px);
  padding-top: 18px;
  border-top: 1px solid var(--hairline-strong);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 20px;
}

.page-about .about-hero__num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(52px, 11vw, 106px);
  line-height: 0.9;
  letter-spacing: -0.045em;
  color: var(--cyan);
}

.page-about .about-hero__num-label {
  font-size: 12px;
  letter-spacing: 0.08em;
  line-height: 1.7;
  color: var(--text-mute);
  max-width: 18ch;
}

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

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--hairline-strong);
  box-shadow: 0 26px 60px rgba(10, 31, 34, 0.45);
}

/* ---------- 为什么是这一页 ---------- */
.page-about .about-why {
  background: var(--paper);
  color: var(--ink);
  padding: var(--about-pad) 0;
}

.page-about .about-why__kicker,
.page-about .about-road__kicker,
.page-about .about-team__kicker,
.page-about .about-coverage__kicker,
.page-about .about-values__kicker {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--grey);
  margin-bottom: 12px;
}

.page-about .about-why__body {
  color: var(--ink);
}

.page-about .about-why__body p {
  font-size: 15.5px;
  line-height: 1.9;
}

.page-about .about-why__points {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hairline-ink);
  border-top: 1px solid var(--hairline-ink);
  border-bottom: 1px solid var(--hairline-ink);
}

.page-about .about-why__points li {
  background: var(--paper);
  padding: 22px 4px 22px 0;
  display: flex;
  align-items: baseline;
  gap: 18px;
}

.page-about .about-why__num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 5vw, 48px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--deep);
  flex: 0 0 auto;
  min-width: 2.4em;
}

.page-about .about-why__points p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 时间轴 ---------- */
.page-about .about-road {
  position: relative;
  overflow: hidden;
  background: var(--archive);
  color: var(--moss);
  padding: var(--about-pad) 0;
}

.page-about .about-road__texture {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.26;
  pointer-events: none;
}

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

.page-about .about-road h2 {
  color: var(--moss);
}

.page-about .about-road__kicker {
  color: var(--amber-deep);
}

.page-about .about-road__lead {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--moss);
  max-width: 34em;
  margin-bottom: clamp(30px, 4vw, 48px);
}

.page-about .about-road__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  border-left: 1px solid var(--archive-line);
}

.page-about .about-road__item {
  position: relative;
  padding: 0 0 34px;
  outline-offset: 6px;
}

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

.page-about .about-road__item:focus-visible {
  outline: 1px solid var(--amber-deep);
}

.page-about .about-road__node {
  position: absolute;
  left: -32px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--amber);
  border: 1px solid var(--amber-deep);
  transition: transform 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-about .about-road__item--current .about-road__node {
  background: var(--orange);
  border-color: var(--orange);
  transform: scale(1.32);
  box-shadow: 0 0 0 5px rgba(255, 92, 26, 0.16);
}

.page-about .about-road__ver {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--amber-deep);
  margin: 0 0 6px;
}

.page-about .about-road__item--current .about-road__ver {
  color: var(--orange);
}

.page-about .about-road h3 {
  color: var(--moss);
  margin-bottom: 8px;
}

.page-about .about-road__desc,
.page-about .about-road__note {
  font-size: 14px;
  line-height: 1.85;
  color: var(--moss);
  max-width: 40em;
}

.page-about .about-road__note {
  margin: 8px 0 0;
  font-size: 13px;
  color: var(--grey);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--paper);
  color: var(--ink);
  padding: var(--about-pad) 0;
}

.page-about .about-team__head p {
  font-size: 15px;
  line-height: 1.9;
  max-width: 42em;
}

.page-about .about-team__media {
  margin: clamp(26px, 4vw, 42px) 0;
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--hairline-ink);
}

.page-about .about-team__groups {
  border-bottom: 1px solid var(--hairline-ink);
}

.page-about .about-team__group {
  border-top: 1px solid var(--hairline-ink);
  padding: 16px 0;
}

.page-about .about-team__group summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-team__tag {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--grey);
  flex: 0 0 auto;
}

.page-about .about-team__name {
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: 19px;
  color: var(--ink);
  position: relative;
  flex: 1 1 auto;
}

.page-about .about-team__name::after {
  content: "";
  display: inline-block;
  vertical-align: middle;
  width: 100%;
  height: 1px;
  background: var(--hairline-ink);
  margin-left: 14px;
  transform: translateY(-3px);
}

.page-about .about-team__group summary::before {
  content: "＋";
  order: 3;
  font-family: var(--font-display);
  font-size: 14px;
  color: var(--orange);
  flex: 0 0 auto;
}

.page-about .about-team__group[open] summary::before {
  content: "－";
}

.page-about .about-team__group p {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.9;
  color: var(--grey);
  max-width: 40em;
}

/* ---------- 覆盖与伙伴 ---------- */
.page-about .about-coverage {
  background: var(--ink);
  color: var(--text);
  padding: var(--about-pad) 0;
}

.page-about .about-coverage h2 {
  color: var(--text);
}

.page-about .about-coverage__kicker {
  color: var(--cyan);
}

.page-about .about-coverage__lead {
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-mute);
  max-width: 44em;
}

.page-about .about-coverage .datastrip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hairline-strong);
  border-top: 1px solid var(--hairline-strong);
  border-bottom: 1px solid var(--hairline-strong);
  margin: clamp(28px, 4vw, 46px) 0;
}

.page-about .about-coverage .datastrip__cell {
  background: var(--ink);
  padding: 22px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-coverage .datastrip__num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 5.4vw, 54px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
}

.page-about .about-coverage .datastrip__label {
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--text-mute);
}

.page-about .about-coverage__cols {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

.page-about .about-coverage__col h3 {
  color: var(--text);
}

.page-about .about-coverage__col p {
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--text-mute);
}

.page-about .about-coverage__tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-coverage__tags li {
  font-size: 12.5px;
  letter-spacing: 0.03em;
  padding: 6px 12px;
  border: 1px solid var(--hairline-strong);
  color: var(--text-mute);
  transition: border-color 180ms var(--ease), color 180ms var(--ease);
}

.page-about .about-coverage__tags li:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

/* ---------- 三件坚持 ---------- */
.page-about .about-values {
  background: var(--paper);
  color: var(--ink);
  padding: var(--about-pad) 0;
}

.page-about .about-values__list {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(24px, 3.4vw, 42px);
}

.page-about .about-values__item {
  border-top: 2px solid var(--orange);
  padding-top: 18px;
}

.page-about .about-values__idx {
  display: block;
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--grey);
  margin-bottom: 10px;
}

.page-about .about-values__item h3 {
  margin-bottom: 10px;
}

.page-about .about-values__item p {
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--ink);
  max-width: 32em;
}

/* ---------- 接下来 ---------- */
.page-about .about-next {
  background: var(--deep);
  color: var(--text);
  padding: var(--about-pad) 0;
}

.page-about .about-next h2 {
  color: var(--text);
}

.page-about .about-next__head p {
  font-size: 14.5px;
  color: var(--text-mute);
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-about .about-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hairline-strong);
  border-top: 1px solid var(--hairline-strong);
  border-bottom: 1px solid var(--hairline-strong);
}

.page-about .about-next__item {
  display: block;
  background: var(--deep);
  padding: 20px 4px 20px 0;
  text-decoration: none;
  color: var(--text);
  transition: background-color 200ms var(--ease);
}

.page-about .about-next__item:hover {
  background: rgba(61, 224, 208, 0.07);
}

.page-about .about-next__name {
  display: block;
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: 19px;
  margin-bottom: 6px;
  transition: color 180ms var(--ease);
}

.page-about .about-next__item:hover .about-next__name {
  color: var(--cyan);
}

.page-about .about-next__desc {
  display: block;
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-mute);
  max-width: 40em;
}

/* ---------- 固定快捷入口 ---------- */
.page-about .about-quick {
  position: fixed;
  right: var(--gutter);
  bottom: 76px;
  z-index: 30;
  display: inline-flex;
  align-items: center;
  padding: 9px 14px;
  background: var(--orange);
  color: var(--ink);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-decoration: none;
  box-shadow: 0 12px 28px rgba(10, 31, 34, 0.35);
  transition: transform 180ms var(--ease);
}

.page-about .about-quick:hover {
  transform: translateY(-2px);
}

/* ---------- 窄屏微调 ---------- */
@media (max-width: 520px) {
  .page-about .about-hero__num-label {
    max-width: none;
  }

  .page-about .about-why__points li {
    flex-direction: column;
    gap: 8px;
  }

  .page-about .about-team__tag {
    display: none;
  }

  .page-about .about-quick {
    padding: 8px 12px;
    font-size: 11px;
    bottom: 68px;
  }
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 760px) {
  .page-about .about-why__points {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-why__points li {
    padding-right: 26px;
  }

  .page-about .about-coverage .datastrip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-about .about-road__list {
    padding-left: 40px;
  }

  .page-about .about-road__node {
    left: -46px;
  }

  .page-about .about-road__note {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0;
    transition: max-height 280ms var(--ease), opacity 220ms var(--ease), margin-top 280ms var(--ease);
  }

  .page-about .about-road__item:hover .about-road__note,
  .page-about .about-road__item:focus-within .about-road__note {
    max-height: 240px;
    opacity: 1;
    margin-top: 8px;
  }

  .page-about .about-road__item:hover .about-road__node {
    transform: scale(1.25);
  }

  .page-about .about-team__inner {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    grid-template-areas:
      "head media"
      "groups media";
    column-gap: clamp(30px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-team__head {
    grid-area: head;
  }

  .page-about .about-team__media {
    grid-area: media;
    margin: 0;
    position: sticky;
    top: 96px;
  }

  .page-about .about-team__groups {
    grid-area: groups;
    margin-top: clamp(24px, 3vw, 38px);
  }

  .page-about .about-coverage__cols {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }

  .page-about .about-next__item {
    padding: 22px 6px 22px 0;
  }
}
</