/* ===========================================================
   品牌档案页 /page-about/
   =========================================================== */

.page-about {
  --about-rail: 208px;
  --about-gap: 46px;
  padding-bottom: 88px;
  color: var(--paper);
}

.page-about .about-wrap {
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--pad);
}

/* ---------- 面包屑 ---------- */

.page-about .about-crumb {
  padding-block: 24px 6px;
}

.page-about .about-crumb .crumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-head);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .about-crumb .crumb__list li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.page-about .about-crumb .crumb__list li + li::before {
  content: "/";
  color: var(--line);
}

.page-about .about-crumb .crumb__list a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .about-crumb .crumb__list a:hover,
.page-about .about-crumb .crumb__list a:focus-visible {
  color: var(--cyan-hi);
  border-bottom-color: var(--cyan);
}

.page-about .about-crumb .crumb__current {
  color: var(--paper);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-block: 26px 44px;
}

.page-about .about-hero__copy .eyebrow {
  margin: 0;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-size: clamp(28px, 7.2vw, 42px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 46ch;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  letter-spacing: 0.01em;
  color: var(--paper-soft);
}

.page-about .about-facts {
  margin: 26px 0 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-facts__row {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-facts dt {
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-facts dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--paper-soft);
}

.page-about .about-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.62) contrast(1.06) brightness(0.86);
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 80% at 82% 8%, rgba(62, 224, 192, 0.2), transparent 62%),
    linear-gradient(160deg, rgba(4, 20, 15, 0) 42%, rgba(4, 20, 15, 0.82) 100%);
}

.page-about .about-hero__media figcaption {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 13px;
  z-index: 2;
  font-family: var(--font-head);
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 档案轨道：侧栏 + 正文 ---------- */

.page-about .about-track {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding-block: 8px 0;
}

.page-about .track-rail__label {
  display: none;
}

.page-about .track-list {
  position: relative;
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .track-list li {
  flex: 0 0 auto;
}

.page-about .track-list li a {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 13px;
  white-space: nowrap;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--muted);
  text-decoration: none;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-about .track-list li a:hover,
.page-about .track-list li a:focus-visible {
  color: var(--cyan-hi);
  border-color: var(--cyan);
}

.page-about .track-list__num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .track-body {
  min-width: 0;
}

/* ---------- 章节通用 ---------- */

.page-about .track-sec {
  padding-block: 30px 0;
}

.page-about .track-sec:first-child {
  padding-top: 6px;
}

.page-about .track-sec__num {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-about .track-sec__num::after {
  content: "";
  flex: 0 0 auto;
  width: 34px;
  height: 1px;
  background: currentColor;
  opacity: 0.55;
}

.page-about .track-sec__head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(22px, 5.4vw, 30px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .track-sec__hint {
  margin: 10px 0 0;
  max-width: 52ch;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 01 起点 ---------- */

.page-about .origin-copy {
  margin-top: 20px;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  letter-spacing: 0.01em;
  color: var(--paper-soft);
}

.page-about .origin-copy p {
  margin: 0 0 18px;
  max-width: 62ch;
}

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

.page-about .origin-lines {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .origin-lines li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 14px 16px;
  background: var(--panel);
}

.page-about .origin-lines__k {
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .origin-lines__k::after {
  content: "→";
  margin-left: 10px;
  color: var(--line);
}

.page-about .origin-lines__v {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 800;
  color: var(--cyan-hi);
}

/* ---------- 02 六栏目 ---------- */

.page-about .col-block {
  position: relative;
  margin-top: 22px;
}

.page-about .col-block__bg {
  position: absolute;
  top: -10px;
  left: 0;
  width: 100%;
  height: auto;
  opacity: 0.15;
  pointer-events: none;
  z-index: 0;
  -webkit-mask-image: radial-gradient(88% 68% at 50% 4%, #000 0%, transparent 78%);
  mask-image: radial-gradient(88% 68% at 50% 4%, #000 0%, transparent 78%);
}

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

.page-about .col-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 20px 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut-sm)), calc(100% - var(--cut-sm)) 100%, 0 100%);
  transition: border-color 190ms var(--ease), background-color 190ms var(--ease), transform 190ms var(--ease);
}

.page-about .col-card:hover,
.page-about .col-card:focus-within {
  border-color: var(--cyan);
  background: var(--raise);
  transform: translateY(-3px);
}

.page-about .col-card h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.38;
  color: var(--paper);
}

.page-about .col-card p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.78;
  color: var(--paper-soft);
}

.page-about .col-card__note {
  padding-top: 10px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-head) !important;
  font-size: 13px !important;
  line-height: 1.65 !important;
  color: var(--muted) !important;
  transition: color 190ms var(--ease);
}

.page-about .col-card:hover .col-card__note,
.page-about .col-card:focus-within .col-card__note {
  color: var(--cyan-hi) !important;
}

.page-about .col-card__link {
  position: relative;
  align-self: flex-start;
  margin-top: auto;
  padding-top: 4px;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--cyan);
  text-decoration: none;
}

.page-about .col-card__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 220ms var(--ease);
}

.page-about .col-card__link:hover::after,
.page-about .col-card__link:focus-visible::after {
  transform: scaleX(1);
}

/* ---------- 数字摘要带 ---------- */

.page-about .about-band {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 16px;
  margin-top: 34px;
  padding: 24px 20px;
  background: var(--raise);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-about .about-band__item {
  min-width: 0;
  padding-left: 12px;
  border-left: 2px solid var(--line);
  transition: border-color 190ms var(--ease);
}

.page-about .about-band__item:hover {
  border-left-color: var(--orange);
}

.page-about .about-band__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 25px;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--cyan-hi);
}

.page-about .about-band__num em {
  font-style: normal;
  margin-left: 1px;
  color: var(--orange);
}

.page-about .about-band__label {
  display: block;
  margin-top: 7px;
  font-family: var(--font-head);
  font-size: 12.5px;
  line-height: 1.55;
  letter-spacing: 0.02em;
  color: var(--muted);
}

/* ---------- 03 作者团队 ---------- */

.page-about .team-block {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 22px;
}

.page-about .team-block__media {
  margin: 0;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-about .team-block__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  filter: saturate(0.5) contrast(1.08) brightness(0.86);
}

.page-about .team-block__lede {
  margin: 0 0 18px;
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--paper-soft);
}

.page-about .team-dirs {
  display: grid;
  gap: 1px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .team-dirs li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 5px;
  padding: 13px 15px;
  background: var(--panel);
}

.page-about .team-dirs__name {
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.03em;
  color: var(--cyan-hi);
}

.page-about .team-dirs__desc {
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--paper-soft);
}

.page-about .team-block__note {
  margin: 0;
  padding-left: 16px;
  border-left: 2px solid var(--orange);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 04 更新节奏 ---------- */

.page-about .cadence-list {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}

.page-about .cadence-list li {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 16px 0 16px 20px;
  border-bottom: 1px solid var(--line-soft);
  transition: background-color 190ms var(--ease);
}

.page-about .cadence-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 24px;
  width: 9px;
  height: 2px;
  background: var(--cyan);
  transform: skewX(-32deg);
  transition: background-color 190ms var(--ease), width 190ms var(--ease);
}

.page-about .cadence-list li:hover::before {
  width: 14px;
  background: var(--orange);
}

.page-about .cadence-list__k {
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .cadence-list__v {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.82;
  color: var(--paper-soft);
}

/* ---------- 05 服务与联系 ---------- */

.page-about .service-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin-top: 22px;
}

.page-about .service-panel h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--cyan-hi);
}

.page-about .service-panel p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper-soft);
}

.page-about .service-panel__link {
  position: relative;
  display: inline-block;
  margin-top: 14px;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--cyan);
  text-decoration: none;
}

.page-about .service-panel__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -3px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 220ms var(--ease);
}

.page-about .service-panel__link:hover::after,
.page-about .service-panel__link:focus-visible::after {
  transform: scaleX(1);
}

/* ===========================================================
   断点
   =========================================================== */

@media (min-width: 560px) {
  .page-about .origin-lines li {
    padding: 15px 18px;
  }

  .page-about .cadence-list li {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
    padding-inline: 20px 0;
  }

  .page-about .team-dirs li {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 14px;
    align-items: baseline;
  }
}

@media (min-width: 640px) {
  .page-about .col-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .col-card--wide {
    grid-column: span 2;
  }

  .page-about .about-band {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    padding: 26px 24px;
  }

  .page-about .service-panel {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 32px;
  }
}

@media (min-width: 820px) {
  .page-about .team-block {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    gap: 36px;
    align-items: start;
  }
}

@media (min-width: 940px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    gap: 52px;
    align-items: center;
    padding-block: 46px 68px;
  }

  .page-about .about-hero__media {
    align-self: stretch;
  }

  .page-about .about-hero__media img {
    height: 100%;
    aspect-ratio: auto;
  }
}

@media (min-width: 900px) {
  .page-about .about-track {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
    padding-block: 26px 0;
  }

  .page-about .track-rail {
    position: sticky;
    top: 118px;
    align-self: start;
  }

  .page-about .track-rail__label {
    display: block;
    margin: 0 0 14px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--line-soft);
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.22em;
    color: var(--muted);
  }

  .page-about .track-list {
    display: block;
    overflow: visible;
    padding: 6px 0 6px 18px;
  }

  .page-about .track-list::before {
    content: "";
    position: absolute;
    left: 3px;
    top: 10px;
    bottom: 10px;
    width: 1px;
    background: linear-gradient(180deg, var(--cyan) 0%, var(--line) 46%, rgba(31, 90, 70, 0) 100%);
  }

  .page-about .track-list li {
    display: block;
  }

  .page-about .track-list li a {
    padding: 9px 0;
    background: none;
    border: 0;
    clip-path: none;
    font-size: 14px;
    color: var(--muted);
  }

  .page-about .track-list li a::before {
    content: "";
    position: absolute;
    left: -18px;
    top: 50%;
    width: 7px;
    height: 7px;
    margin-top: -3.5px;
    border-radius: 50%;
    border: 1px solid var(--line);
    background: var(--ink);
    transition: border-color 180ms var(--ease), background-color 180ms var(--ease), box-shadow 180ms var(--ease);
  }

  .page-about .track-list li a:hover::before,
  .page-about .track-list li a:focus-visible::before {
    border-color: var(--cyan);
    background: var(--cyan);
    box-shadow: 0 0 0 4px rgba(62, 224, 192, 0.16);
  }

  .page-about .track-sec {
    padding-block: 38px 0;
  }

  .page-about .track-sec:first-child {
    padding-top: 0;
  }
}

@media (min-width: 1024px) {
  .page-about .col-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .col-card--wide {
    grid-column: span 4;
  }

  .page-about .col-card--half {
    grid-column: span 2;
  }

  .page-about .col-card--third {
    grid-column: span 3;
  }

  .page-about .col-card {
    padding: 22px 22px 20px;
  }

  .page-about .about-band {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 6px;
    padding: 28px 24px;
  }

  .page-about .about-band__num {
    font-size: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .col-card,
  .page-about .col-card__link::after,
  .page-about .service-panel__link::after,
  .page-about .track-list li a,
  .page-about .track-list li a::before,
  .page-about .cadence-list li::before,
  .page-about .about-band__item {
    transition: none;
  }

  .page-about .col-card:hover,
  .page-about .col-card:focus-within {
    transform: none;
  }
}
<<<END>>>