/* ============================================================
   品牌总览 · page-about
   ============================================================ */

.page-about {
  --about-rail: 138px;
  --about-hair: rgba(198, 210, 222, 0.16);
  --about-hair-ink: rgba(11, 30, 51, 0.12);
  background: var(--paper);
  color: var(--ink-800);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4vw, 36px) 0 clamp(52px, 8vw, 100px);
  background:
    radial-gradient(115% 85% at 14% 0%, rgba(20, 47, 76, 0.98) 0%, rgba(11, 30, 51, 0.99) 46%, var(--ink-900) 100%);
  color: var(--paper);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(198, 210, 222, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(198, 210, 222, 0.06) 1px, transparent 1px);
  background-size: 68px 68px;
  -webkit-mask-image: radial-gradient(95% 75% at 80% 18%, #000 0%, transparent 74%);
  mask-image: radial-gradient(95% 75% at 80% 18%, #000 0%, transparent 74%);
  pointer-events: none;
}

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

.page-about .about-crumb {
  margin-bottom: clamp(22px, 4vw, 42px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

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

.page-about .about-crumb li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

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

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

.page-about .about-crumb a:hover {
  text-decoration: underline;
}

.page-about .about-crumb [aria-current="page"] {
  color: var(--paper-dim);
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 60px);
  align-items: start;
}

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: 6fr 5fr;
  }
}

.page-about .about-hero h1 {
  margin: 12px 0 0;
  max-width: 19ch;
  font-family: var(--font-display);
  font-size: clamp(34px, 5.4vw, 58px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__v {
  font-family: var(--font-mono);
  font-weight: 700;
  background: var(--gold-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-hero__intro {
  margin: 22px 0 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--paper-dim);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .about-hero__side {
  display: grid;
  gap: 1px;
}

.page-about .about-plate {
  display: grid;
  gap: 6px;
  padding: 22px 26px 20px;
  border: 1px solid rgba(201, 138, 22, 0.55);
  background: linear-gradient(150deg, rgba(20, 47, 76, 0.96) 0%, rgba(11, 30, 51, 0.9) 100%);
  box-shadow: inset 0 1px 0 rgba(240, 180, 41, 0.2);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

.page-about .about-plate__label {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold-2);
}

.page-about .about-plate__no {
  font-size: clamp(40px, 6vw, 58px);
  font-weight: 700;
  line-height: 1;
  background: var(--gold-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-plate__note {
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate);
}

.page-about .about-marks {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
  border-top: 0;
}

.page-about .about-mark {
  display: grid;
  gap: 6px;
  padding: 18px 18px 16px;
  background: rgba(11, 30, 51, 0.82);
}

.page-about .about-mark__num {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
}

.page-about .about-mark:nth-child(1) .about-mark__num { color: var(--gold-2); }
.page-about .about-mark:nth-child(2) .about-mark__num { color: var(--celadon); }
.page-about .about-mark:nth-child(3) .about-mark__num { color: var(--electric); }
.page-about .about-mark:nth-child(4) .about-mark__num { color: var(--paper); }

.page-about .about-mark__label {
  font-size: 12px;
  color: var(--slate);
}

/* ---------- 通用色带 ---------- */

.page-about .about-band {
  padding: clamp(56px, 8vw, 104px) 0;
}

.page-about .about-band--deep {
  background: linear-gradient(180deg, var(--ink-900) 0%, var(--ink-800) 55%, var(--ink-700) 100%);
  color: var(--paper);
}

.page-about .about-band--paper {
  background: var(--paper);
  color: var(--ink-800);
}

.page-about .about-band--paper .kicker {
  color: var(--cinnabar);
}

.page-about .about-band--paper .section-head__title {
  color: var(--ink-800);
}

.page-about .about-band--paper .section-head__lead {
  color: var(--slate-deep);
}

.page-about .about-band--deep .section-head__lead {
  color: var(--paper-dim);
}

/* ---------- 时间线 ---------- */

.page-about .about-era-banner {
  margin: clamp(28px, 4vw, 44px) 0 clamp(34px, 5vw, 56px);
  border: 1px solid var(--about-hair);
  background: rgba(11, 30, 51, 0.6);
}

.page-about .about-era-banner .media__caption {
  margin: 0;
  padding: 12px 16px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--slate);
  border-top: 1px solid var(--about-hair);
}

.page-about .about-rail {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: era;
}

.page-about .about-rail__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  padding: 26px 0;
  border-top: 1px solid var(--about-hair);
}

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

.page-about .about-rail__mark {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-about .about-rail__version {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gold-2);
}

.page-about .about-rail__dot {
  flex: none;
  width: 10px;
  height: 10px;
  background: var(--gold-grad);
  transform: rotate(45deg);
}

.page-about .about-rail__stage {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-about .about-rail__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-rail__text {
  margin: 10px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--paper-dim);
}

.page-about .about-rail__facts {
  display: grid;
  gap: 10px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rail__facts li {
  position: relative;
  padding-left: 20px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .about-rail__facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 10px;
  height: 1px;
  background: var(--celadon);
}

@media (min-width: 860px) {
  .page-about .about-rail__item {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(24px, 3.4vw, 52px);
    padding: 34px 0;
  }

  .page-about .about-rail__item::before {
    content: "";
    position: absolute;
    left: calc(var(--about-rail) - 1px);
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(180deg, transparent 0%, rgba(198, 210, 222, 0.24) 12%, rgba(198, 210, 222, 0.24) 88%, transparent 100%);
  }

  .page-about .about-rail__mark {
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: flex-end;
    justify-content: flex-start;
    gap: 12px;
    padding-right: 18px;
    position: sticky;
    top: calc(var(--header-h) + 26px);
    align-self: start;
    text-align: right;
  }
}

.page-about .about-rail__back {
  margin: 26px 0 0;
  font-size: 13px;
}

.page-about .about-rail__back a {
  color: var(--electric);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 209, 232, 0.4);
  padding-bottom: 2px;
}

.page-about .about-rail__back a:hover {
  border-bottom-color: var(--electric);
}

/* ---------- 服务覆盖 ---------- */

.page-about .about-cover__top {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

@media (min-width: 960px) {
  .page-about .about-cover__top {
    grid-template-columns: 4fr 8fr;
  }
}

.page-about .about-cover__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--ink-800);
}

.page-about .about-cover__prose {
  margin-top: 18px;
}

.page-about .about-cover__prose p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--slate-deep);
}

.page-about .about-cover__links {
  display: grid;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-cover__links li {
  border-top: 1px solid var(--about-hair-ink);
  padding-top: 12px;
}

.page-about .about-cover__links a {
  font-size: 14px;
  color: var(--ink-700);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 84, 43, 0.5);
  padding-bottom: 2px;
}

.page-about .about-cover__links a:hover {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

.page-about .about-cover__media {
  border: 1px solid var(--about-hair-ink);
  background: var(--ink-800);
}

.page-about .about-cover__media .media__caption {
  margin: 0;
  padding: 12px 16px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--slate-deep);
  background: var(--paper);
  border-top: 1px solid var(--about-hair-ink);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(30px, 4vw, 46px);
  background: var(--about-hair-ink);
  border: 1px solid var(--about-hair-ink);
}

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

.page-about .about-stat {
  display: grid;
  gap: 8px;
  padding: 22px 18px;
  background: var(--paper);
}

.page-about .about-stat:nth-child(1) { box-shadow: inset 0 3px 0 0 var(--electric); }
.page-about .about-stat:nth-child(2) { box-shadow: inset 0 3px 0 0 var(--celadon); }
.page-about .about-stat:nth-child(3) { box-shadow: inset 0 3px 0 0 var(--gold-2); }
.page-about .about-stat:nth-child(4) { box-shadow: inset 0 3px 0 0 var(--violet); }

.page-about .about-stat__num {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--ink-800);
}

.page-about .about-stat__label {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--slate-deep);
}

.page-about .about-trend-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 38px);
  margin-top: clamp(30px, 4vw, 46px);
  padding: clamp(24px, 4vw, 40px);
  background: linear-gradient(150deg, var(--ink-800) 0%, var(--ink-900) 100%);
  color: var(--paper);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

@media (min-width: 900px) {
  .page-about .about-trend-card {
    grid-template-columns: 8fr 4fr;
    align-items: center;
  }
}

.page-about .about-trend {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-trend__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

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

.page-about .about-legend li {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-legend li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-legend__swatch {
  width: 12px;
  height: 12px;
  transform: rotate(45deg);
}

.page-about .about-legend__swatch--electric { background: var(--electric); }
.page-about .about-legend__swatch--gold { background: var(--gold-2); }
.page-about .about-legend__swatch--celadon { background: var(--celadon); }

.page-about .about-legend__k {
  font-size: 13px;
  color: var(--paper-dim);
}

.page-about .about-legend__v {
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

/* ---------- 团队与协作 ---------- */

.page-about .about-band--team {
  background: linear-gradient(180deg, var(--paper) 0%, #ECF1F5 100%);
}

.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 56px);
  align-items: start;
}

@media (min-width: 960px) {
  .page-about .about-team {
    grid-template-columns: 4fr 8fr;
  }
}

.page-about .about-team__title {
  margin: 12px 0 26px;
  font-family: var(--font-display);
  font-size: clamp(23px, 3vw, 31px);
  font-weight: 800;
  line-height: 1.26;
  letter-spacing: -0.01em;
  color: var(--ink-800);
}

.page-about .about-figure {
  display: grid;
  gap: 5px;
  padding: 16px 0 16px 20px;
  border-left: 2px solid var(--gold-2);
}

.page-about .about-figure + .about-figure {
  margin-top: 16px;
  border-left-color: var(--celadon);
}

.page-about .about-figure__num {
  font-size: clamp(30px, 4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--ink-800);
}

.page-about .about-figure__label {
  font-size: 13px;
  color: var(--slate-deep);
}

.page-about .about-team__body .prose p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--slate-deep);
}

.page-about .about-partners {
  display: grid;
  gap: 1px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  background: var(--about-hair-ink);
  border: 1px solid var(--about-hair-ink);
}

.page-about .about-partners__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "no role"
    "no desc";
  align-items: baseline;
  gap: 2px 16px;
  padding: 18px 18px 18px 14px;
  background: var(--paper);
  border-left: 3px solid transparent;
  transition: border-color 160ms ease, background-color 160ms ease;
}

.page-about .about-partners__item:hover {
  border-left-color: var(--electric);
  background: #EEF4F8;
}

.page-about .about-partners__no {
  grid-area: no;
  font-size: 12px;
  color: var(--slate);
  letter-spacing: 0.08em;
}

.page-about .about-partners__role {
  grid-area: role;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-800);
}

.page-about .about-partners__desc {
  grid-area: desc;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--slate-deep);
}

.page-about .about-team__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 资质与认可 ---------- */

.page-about .about-band--credits {
  background: linear-gradient(180deg, var(--ink-700) 0%, var(--ink-800) 40%, var(--ink-900) 100%);
  color: var(--paper);
}

.page-about .about-credits {
  display: grid;
  gap: 12px;
  margin-top: clamp(26px, 4vw, 40px);
}

.page-about .about-credits .fold {
  border: 1px solid var(--about-hair);
  background: rgba(6, 17, 29, 0.5);
  transition: border-color 180ms ease;
}

.page-about .about-credits .fold:hover {
  border-color: rgba(201, 138, 22, 0.5);
}

.page-about .about-credits .fold__head {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  padding: 20px 22px;
  text-align: left;
}

.page-about .about-credits .fold__title {
  flex: 1 1 220px;
  font-family: var(--font-display);
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-credits .fold__meta {
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--gold-2);
  border: 1px solid rgba(201, 138, 22, 0.5);
  padding: 3px 9px;
}

.page-about .about-credits .fold__inner {
  padding: 0 22px 22px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--paper-dim);
}

.page-about .about-credits .fold__inner p {
  margin: 0 0 12px;
}

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

.page-about .about-credits__link {
  color: var(--electric);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 209, 232, 0.45);
  padding-bottom: 2px;
}

.page-about .about-credits__link:hover {
  border-bottom-color: var(--electric);
}

/* ---------- 长期维护节奏 ---------- */

.page-about .about-cadence {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(26px, 4vw, 40px);
  background: var(--about-hair-ink);
  border: 1px solid var(--about-hair-ink);
}

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

@media (min-width: 1060px) {
  .page-about .about-cadence {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-cadence__card {
  display: grid;
  gap: 8px;
  padding: 24px 20px 26px;
  background: var(--paper);
  border-top: 3px solid var(--ink-700);
}

.page-about .about-cadence__card:nth-child(2) { border-top-color: var(--celadon); }
.page-about .about-cadence__card:nth-child(3) { border-top-color: var(--gold-2); }
.page-about .about-cadence__card:nth-child(4) { border-top-color: var(--cinnabar); }

.page-about .about-cadence__num {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--cinnabar);
}

.page-about .about-cadence__card:nth-child(2) .about-cadence__num { color: var(--celadon); }
.page-about .about-cadence__card:nth-child(3) .about-cadence__num { color: var(--gold-2); }
.page-about .about-cadence__card:nth-child(4) .about-cadence__num { color: var(--ink-700); }

.page-about .about-cadence__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink-800);
}

.page-about .about-cadence__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--slate-deep);
}

.page-about .about-cadence__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: clamp(24px, 3vw, 36px);
  padding-top: 22px;
  border-top: 1px solid var(--about-hair-ink);
}

.page-about .about-cadence__foot p {
  margin: 0;
  font-size: 14px;
  color: var(--slate-deep);
}

/* ---------- 收尾 ---------- */

.page-about .about-band--cta {
  background:
    radial-gradient(90% 130% at 88% 0%, rgba(122, 92, 255, 0.16) 0%, transparent 62%),
    linear-gradient(120deg, var(--ink-900) 0%, var(--ink-700) 100%);
  color: var(--paper);
}

.page-about .about-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

@media (min-width: 880px) {
  .page-about .about-cta {
    grid-template-columns: 8fr 4fr;
  }
}

.page-about .about-cta__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 800;
  line-height: 1.28;
  color: var(--paper);
}

.page-about .about-cta__lead {
  margin: 14px 0 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-dim);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 880px) {
  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

/* ---------- 窄屏保护 ---------- */

@media (max-width: 420px) {
  .page-about .about-marks {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .about-plate {
    padding: 20px 18px;
  }

  .page-about .about-trend-card {
    padding: 20px 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-partners__item,
  .page-about .about-credits .fold {
    transition: none;
  }
}
<<<END>>>