.page-about {
  --about-pad: clamp(56px, 9vw, 120px);
  display: block;
}

.page-about .about-crumb {
  padding-top: clamp(18px, 3vw, 30px);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  margin-top: clamp(16px, 3vw, 32px);
  border-top: 1px solid var(--hair-soft);
  border-bottom: 1px solid var(--hair-soft);
  background: var(--royal-blue-950);
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
}

.page-about .about-hero__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .34;
}

.page-about .about-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 11, 26, .52) 0%, rgba(5, 11, 26, .84) 62%, var(--royal-blue-950) 100%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  padding: clamp(76px, 16vh, 168px) var(--gutter) clamp(36px, 6vw, 64px);
}

.page-about .about-hero__title {
  margin: 18px 0 0;
  max-width: 15em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 7.4vw, 88px);
  line-height: 1.12;
  letter-spacing: .01em;
  color: var(--ivory-100);
}

.page-about .about-hero__vnote {
  margin: 22px 0 0;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .34em;
  text-transform: uppercase;
  color: var(--champagne-200);
  opacity: .85;
}

.page-about .about-hero__lede {
  max-width: 38em;
  margin: clamp(20px, 3vw, 32px) 0 0;
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--ivory-100);
  opacity: .92;
}

.page-about .about-jump {
  display: flex;
  gap: 10px;
  margin-top: clamp(30px, 5vw, 56px);
  padding-top: 20px;
  border-top: 1px solid var(--hair-soft);
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-jump::-webkit-scrollbar {
  display: none;
}

.page-about .about-jump a {
  flex: 0 0 auto;
  padding: 9px 16px;
  border: 1px solid var(--hair-soft);
  color: var(--champagne-200);
  font-size: 13px;
  letter-spacing: .06em;
  text-decoration: none;
  transition: border-color .18s var(--ease), color .18s var(--ease), background .18s var(--ease);
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  border-color: var(--champagne-500);
  background: var(--glass-veil);
  color: var(--ivory-100);
}

@media (min-width: 900px) {
  .page-about .about-hero__vnote {
    position: absolute;
    right: var(--gutter);
    top: clamp(96px, 18vh, 186px);
    margin: 0;
    writing-mode: vertical-rl;
    letter-spacing: .42em;
  }
}

/* 品牌自述 */
.page-about .about-self {
  padding: var(--about-pad) 0;
}

.page-about .about-self__grid {
  display: grid;
  gap: clamp(24px, 4vw, 56px);
}

.page-about .about-self__aside {
  display: flex;
  gap: clamp(14px, 2vw, 28px);
  align-items: flex-start;
}

.page-about .about-self__rot {
  margin: 6px 0 0;
  writing-mode: vertical-rl;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .36em;
  color: var(--champagne-500);
  opacity: .8;
}

.page-about .about-self__prose p {
  margin: 0 0 1.5em;
}

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

@media (min-width: 900px) {
  .page-about .about-self__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
}

/* 阶段带 */
.page-about .about-phases {
  padding: var(--about-pad) 0;
  background: var(--royal-blue-900);
  border-top: 1px solid var(--hair-soft);
  border-bottom: 1px solid var(--hair-soft);
}

.page-about .about-phases__head {
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-phases__media {
  margin: 0 0 clamp(32px, 5vw, 56px);
}

.page-about .media-frame img {
  display: block;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-track {
  display: flex;
  align-items: flex-start;
  gap: clamp(6px, 2vw, 28px);
  margin: 0 0 clamp(24px, 3.5vw, 42px);
}

.page-about .about-node {
  position: relative;
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 0 0 4px;
  background: none;
  border: 0;
  color: var(--slate-300);
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: .04em;
  cursor: pointer;
  transition: color .18s var(--ease);
}

.page-about .about-node::before,
.page-about .about-node::after {
  content: "";
  position: absolute;
  top: 13px;
  height: 1px;
  background: var(--hair-soft);
}

.page-about .about-node::before {
  left: 0;
  right: calc(50% + 20px);
}

.page-about .about-node::after {
  left: calc(50% + 20px);
  right: 0;
}

.page-about .about-node:first-child::before,
.page-about .about-node:last-child::after {
  opacity: 0;
}

.page-about .about-node__ring {
  position: relative;
  z-index: 1;
  width: 27px;
  height: 27px;
  border-radius: 50%;
  border: 1px solid var(--brass-line);
  background: radial-gradient(circle at 50% 50%, rgba(201, 164, 92, .6) 0 4px, transparent 4px);
  transition: transform .24s var(--ease), border-color .24s var(--ease), box-shadow .24s var(--ease);
}

.page-about .about-node:hover,
.page-about .about-node:focus-visible {
  color: var(--ivory-100);
  outline: none;
}

.page-about .about-node:hover .about-node__ring,
.page-about .about-node:focus-visible .about-node__ring {
  transform: scale(1.16);
  border-color: var(--champagne-500);
  box-shadow: 0 0 0 5px rgba(201, 164, 92, .1);
}

.page-about .about-node__label {
  line-height: 1.4;
  text-align: center;
}

.page-about [data-filter-item][hidden] {
  display: none !important;
}

.page-about .about-phase-cards {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
}

.page-about .about-phase {
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--royal-blue-950);
  border: 1px solid var(--hair-soft);
  transition: transform .18s var(--ease), border-color .18s var(--ease);
}

.page-about .about-phase:hover {
  transform: translateY(-2px);
  border-color: var(--hair);
}

.page-about .about-phase__idx {
  margin: 0;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .22em;
  color: var(--champagne-500);
}

.page-about .about-phase__title {
  margin: 10px 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2vw, 24px);
  color: var(--ivory-100);
}

.page-about .about-phase p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate-300);
}

.page-about .about-phase .about-phase__gain {
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--hair-soft);
  font-size: 14px;
  color: var(--champagne-200);
}

@media (min-width: 820px) {
  .page-about .about-phase-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* 团队 */
.page-about .about-team {
  padding: var(--about-pad) 0;
  margin: clamp(40px, 6vw, 72px) 0;
  border-top: 1px solid var(--hair-soft);
  border-bottom: 1px solid var(--hair-soft);
  background: linear-gradient(180deg, var(--royal-blue-700) 0%, var(--royal-blue-900) 76%, var(--royal-blue-950) 100%);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(28px, 4vw, 60px);
}

.page-about .about-ring {
  position: relative;
  display: grid;
  place-items: center;
  width: min(230px, 58vw);
  aspect-ratio: 1;
  margin: clamp(20px, 3vw, 30px) auto 0;
  border-radius: 50%;
  background: conic-gradient(
    var(--champagne-500) 0deg 90deg,
    var(--claret-700) 90deg 180deg,
    var(--emerald-600) 180deg 270deg,
    var(--royal-blue-700) 270deg 360deg
  );
}

.page-about .about-ring::before {
  content: "";
  position: absolute;
  inset: 16px;
  border-radius: 50%;
  background: var(--royal-blue-950);
}

.page-about .about-ring__core {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.page-about .about-ring__num {
  font-family: var(--font-num);
  font-size: 46px;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--champagne-200);
}

.page-about .about-ring__unit {
  font-size: 12px;
  letter-spacing: .26em;
  color: var(--slate-300);
}

.page-about .about-ring__cap {
  margin: 16px 0 0;
  text-align: center;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-300);
}

.page-about .about-team__list {
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-team__list details {
  border-top: 1px solid var(--hair-soft);
}

.page-about .about-team__list details:last-of-type {
  border-bottom: 1px solid var(--hair-soft);
}

.page-about .about-team__list summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: clamp(17px, 1.8vw, 20px);
  color: var(--ivory-100);
}

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

.page-about .about-team__list summary::after {
  content: "+";
  font-family: var(--font-num);
  font-size: 20px;
  line-height: 1;
  color: var(--champagne-500);
}

.page-about .about-team__list details[open] summary::after {
  content: "–";
}

.page-about .about-team__list details p {
  max-width: 40em;
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate-300);
}

.page-about .about-team__media {
  margin: clamp(24px, 3.5vw, 40px) 0 0;
}

@media (min-width: 900px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .about-ring {
    margin-left: 0;
  }

  .page-about .about-ring__cap {
    text-align: left;
  }
}

/* 质量把关 */
.page-about .about-quality {
  padding: var(--about-pad) 0;
}

.page-about .about-quality__grid {
  display: grid;
  gap: clamp(26px, 4vw, 60px);
}

.page-about .about-quality__head .prose {
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate-300);
}

.page-about .about-checks {
  counter-reset: check;
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--hair-soft);
}

.page-about .about-checks li {
  counter-increment: check;
  position: relative;
  padding: 18px 0 18px 58px;
  border-bottom: 1px solid var(--hair-soft);
}

.page-about .about-checks li::before {
  content: "0" counter(check);
  position: absolute;
  left: 0;
  top: 20px;
  font-family: var(--font-num);
  font-size: 14px;
  letter-spacing: .16em;
  color: var(--champagne-500);
}

.page-about .about-checks strong {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--ivory-100);
}

.page-about .about-checks span {
  display: block;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate-300);
}

@media (min-width: 900px) {
  .page-about .about-quality__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: start;
  }
}

/* 服务覆盖 */
.page-about .about-cover {
  padding: var(--about-pad) 0;
  border-top: 1px solid var(--hair-soft);
  border-bottom: 1px solid var(--hair-soft);
  background: linear-gradient(160deg, var(--royal-blue-900) 0%, var(--royal-blue-950) 72%);
}

.page-about .about-cover__head {
  max-width: 52em;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-stats {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: 0 0 clamp(30px, 4vw, 52px);
  padding: 0;
  background: var(--hair-soft);
  border: 1px solid var(--hair-soft);
}

.page-about .about-stats li {
  background: var(--royal-blue-950);
  padding: clamp(22px, 3vw, 34px) clamp(18px, 2.4vw, 28px);
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(38px, 5vw, 58px);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--champagne-500);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate-300);
}

.page-about .about-partners__lead {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: 17px;
  color: var(--champagne-200);
}

.page-about .about-partners__grid {
  gap: clamp(12px, 1.6vw, 18px);
}

.page-about .about-partner {
  padding: 18px;
  border: 1px solid var(--hair-soft);
  background: var(--glass-veil);
  transition: border-color .18s var(--ease), transform .18s var(--ease);
}

.page-about .about-partner:hover {
  transform: translateY(-2px);
  border-color: var(--hair);
}

.page-about .about-partner p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate-300);
}

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

  .page-about .about-partners__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .about-partners__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* 长期相处 */
.page-about .about-long {
  padding: clamp(64px, 10vw, 150px) 0 clamp(72px, 10vw, 140px);
}

.page-about .about-long__head {
  max-width: 54em;
  margin-bottom: clamp(30px, 4.5vw, 52px);
}

.page-about .about-steps {
  list-style: none;
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
  margin: 0;
  padding: 0;
}

.page-about .about-steps li {
  padding: 22px 20px;
  border: 1px solid var(--hair-soft);
  background: var(--royal-blue-900);
  transition: transform .18s var(--ease), border-color .18s var(--ease);
}

.page-about .about-steps li:hover {
  transform: translateY(-2px);
  border-color: var(--hair);
}

.page-about .about-steps__num {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .24em;
  color: var(--champagne-500);
}

.page-about .about-steps h3 {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--ivory-100);
}

.page-about .about-steps p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate-300);
}

.page-about .about-long__foot {
  max-width: 60em;
  margin-top: clamp(34px, 5vw, 60px);
  padding-top: clamp(26px, 3.5vw, 40px);
  border-top: 1px solid var(--hair-soft);
}

.page-about .about-long__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate-300);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-long__links {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate-300);
}

.page-about .about-long__links a {
  color: var(--champagne-200);
  text-decoration: underline;
  text-underline-offset: 4px;
}

@media (min-width: 700px) {
  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .about-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* 渐显 */
.js .page-about [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .24s var(--ease), transform .24s var(--ease);
}

.js .page-about [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}