/* ===== 品牌中心 / page-about ===== */

.page-about {
  display: block;
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(40px, 7vw, 72px) 0 clamp(56px, 8vw, 96px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.page-about .about-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 38%;
  opacity: 0.34;
  filter: saturate(0.62) contrast(1.12) brightness(0.82);
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(198deg, rgba(7, 12, 26, 0.86) 0%, rgba(7, 12, 26, 0.5) 42%, rgba(7, 12, 26, 0.97) 100%),
    repeating-linear-gradient(114deg, rgba(43, 231, 214, 0.055) 0 2px, transparent 2px 10px);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--s4);
}

.page-about .about-hero .crumbs {
  margin-bottom: var(--s2);
}

.page-about .about-hero__title {
  margin: 0;
  font-size: clamp(42px, 12vw, 96px);
  line-height: 0.98;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-hero__title-em {
  color: transparent;
  -webkit-text-stroke: 1.5px var(--cyan);
  text-stroke: 1.5px var(--cyan);
}

.page-about .about-hero__aside {
  display: grid;
  gap: var(--s4);
  align-content: end;
  border-left: 2px solid var(--line-strong);
  padding-left: var(--s4);
}

.page-about .about-hero__aside .lede {
  margin: 0;
  color: var(--paper);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s2);
}

/* ---------- 品牌档案条 ---------- */
.page-about .about-archive {
  padding: var(--s6) 0;
  background:
    linear-gradient(180deg, rgba(14, 23, 48, 0.92) 0%, rgba(7, 12, 26, 0.98) 100%);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-archive__title {
  margin: 0 0 var(--s4);
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-archive__list {
  display: grid;
  gap: var(--s4);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-archive__item {
  display: grid;
  gap: 6px;
  padding-left: var(--s2);
  border-left: 1px solid var(--line);
}

.page-about .about-archive__k {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .about-archive__v {
  font-size: 32px;
  line-height: 1.1;
  color: var(--paper);
}

.page-about .about-archive__v--text {
  font-family: var(--font-editorial);
  font-size: 26px;
  font-weight: 600;
}

.page-about .about-archive__unit {
  font-size: 16px;
  color: var(--cyan);
  margin-left: 2px;
}

/* ---------- 通用章节头 ---------- */
.page-about .about-sec-head {
  margin-bottom: var(--s5);
  max-width: 46ch;
}

.page-about .about-sec-head--tight {
  margin-bottom: var(--s4);
}

.page-about .about-sec-head .kicker {
  margin: 0 0 var(--s2);
}

.page-about .about-sec-head__title {
  margin: 0 0 var(--s2);
  font-family: var(--font-editorial);
  font-size: clamp(26px, 4.6vw, 42px);
  font-weight: 600;
  line-height: 1.24;
  color: var(--paper);
}

.page-about .about-sec-head__lede {
  margin: 0;
  font-size: 17px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline {
  padding: clamp(64px, 9vw, 120px) 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-strong) 30%, transparent 90%);
}

.page-about .about-timeline__grid {
  display: grid;
  gap: var(--s5);
}

.page-about .about-index {
  align-self: start;
}

.page-about .about-index__k {
  margin: 0 0 var(--s2);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-index__list {
  display: flex;
  gap: var(--s2);
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

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

.page-about .about-index__list a {
  display: grid;
  gap: 2px;
  min-width: 96px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(22, 36, 74, 0.4);
  text-decoration: none;
  transition: border-color 220ms ease, background-color 220ms ease, transform 220ms ease;
}

.page-about .about-index__num {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .about-index__year {
  font-size: 18px;
  color: var(--cyan);
}

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

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  border-color: var(--cyan);
  background: rgba(43, 231, 214, 0.08);
  transform: translateY(-2px);
}

.page-about .about-stages {
  display: grid;
  gap: var(--s4);
}

.page-about .about-stage {
  position: relative;
  padding: var(--s4) var(--s4) var(--s4) calc(var(--s4) + 10px);
  background: linear-gradient(160deg, rgba(22, 36, 74, 0.72) 0%, rgba(14, 23, 48, 0.88) 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  scroll-margin-top: 96px;
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: 0;
  top: var(--s4);
  bottom: var(--s4);
  width: 3px;
  background: linear-gradient(180deg, var(--cyan), rgba(43, 231, 214, 0));
}

.page-about .about-stage--paper {
  background: var(--paper-2);
  border-color: rgba(14, 23, 48, 0.14);
  box-shadow: 7px 7px 0 rgba(43, 231, 214, 0.16), var(--shadow-card);
}

.page-about .about-stage--paper::before {
  background: linear-gradient(180deg, var(--hot), rgba(255, 90, 43, 0));
}

.page-about .about-stage__head {
  display: flex;
  align-items: baseline;
  gap: var(--s2);
  margin-bottom: var(--s2);
}

.page-about .about-stage__num {
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-stage--paper .about-stage__num {
  color: var(--hot);
}

.page-about .about-stage__title {
  margin: 0;
  font-family: var(--font-editorial);
  font-size: clamp(20px, 3.4vw, 27px);
  font-weight: 600;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-stage--paper .about-stage__title {
  color: var(--navy);
}

.page-about .about-stage__text {
  margin: 0 0 var(--s3);
  font-size: 17px;
  line-height: 1.78;
  color: #C9D5E8;
}

.page-about .about-stage--paper .about-stage__text {
  color: #2C3654;
}

.page-about .about-stage__more {
  border-top: 1px dashed var(--line-soft);
  padding-top: var(--s2);
}

.page-about .about-stage--paper .about-stage__more {
  border-top-color: rgba(14, 23, 48, 0.18);
}

.page-about .about-stage__more summary {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-stage__more summary::after {
  content: "+";
  display: inline-block;
  font-size: 16px;
  line-height: 1;
  color: var(--cyan);
  transition: transform 220ms ease;
}

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

.page-about .about-stage--paper .about-stage__more summary,
.page-about .about-stage--paper .about-stage__more summary::after {
  color: #1B4FA8;
}

.page-about .about-stage__facts {
  display: grid;
  gap: var(--s2);
  margin: var(--s3) 0 0;
}

.page-about .about-stage__fact {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s2);
  border-bottom: 1px dotted var(--line-soft);
  padding-bottom: 8px;
}

.page-about .about-stage--paper .about-stage__fact {
  border-bottom-color: rgba(14, 23, 48, 0.2);
}

.page-about .about-stage__fact dt {
  font-size: 14px;
  color: var(--mist);
}

.page-about .about-stage--paper .about-stage__fact dt {
  color: #55658A;
}

.page-about .about-stage__fact dd {
  margin: 0;
  font-size: 15px;
  color: var(--paper);
}

.page-about .about-stage--paper .about-stage__fact dd {
  color: var(--navy);
}

/* ---------- 团队与分工 ---------- */
.page-about .about-team {
  padding: clamp(64px, 9vw, 120px) 0;
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(108, 92, 231, 0.16) 0%, rgba(7, 12, 26, 0) 58%),
    var(--ink);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-team__grid {
  display: grid;
  gap: var(--s5);
}

.page-about .about-team__chart {
  display: grid;
  gap: var(--s3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__row {
  padding: var(--s3);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: rgba(22, 36, 74, 0.34);
  transition: border-color 220ms ease, transform 220ms ease;
}

.page-about .about-team__row:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.page-about .about-team__row-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s2);
  margin-bottom: 10px;
}

.page-about .about-team__row-name {
  margin: 0;
  font-family: var(--font-editorial);
  font-size: 18px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .about-team__row-num {
  font-size: 16px;
  color: var(--cyan);
}

.page-about .about-team__track {
  height: 10px;
  border-radius: 999px;
  background: rgba(159, 176, 204, 0.14);
  overflow: hidden;
  margin-bottom: 10px;
}

.page-about .about-team__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
}

.page-about .about-team__fill--tech {
  width: 61%;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
}

.page-about .about-team__fill--edit {
  width: 26%;
  background: linear-gradient(90deg, var(--cyan-soft), var(--cyan));
}

.page-about .about-team__fill--care {
  width: 13%;
  background: linear-gradient(90deg, var(--gold), var(--hot));
}

.page-about .about-team__row-role {
  margin: 0;
  font-size: 16px;
  line-height: 1.72;
  color: #C3D0E6;
}

.page-about .about-team__note {
  margin: var(--s4) 0 0;
  padding-left: var(--s3);
  border-left: 2px solid var(--gold);
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-team__figure {
  margin: 0;
  position: relative;
}

.page-about .about-team__figure .frame-media {
  border: 1px solid var(--line);
}

/* ---------- 内容协作生态 ---------- */
.page-about .about-eco {
  padding: clamp(64px, 9vw, 120px) 0;
}

.page-about .about-eco__grid {
  display: grid;
  gap: var(--s5);
}

.page-about .about-eco__figure {
  margin: 0;
  position: relative;
}

.page-about .about-eco__figure .frame-media {
  border: 1px solid var(--line);
}

.page-about .about-eco__figure .frame-media img {
  filter: brightness(0.78) saturate(0.85);
}

.page-about .about-eco__text {
  margin: 0 0 var(--s4);
  font-size: 17px;
  line-height: 1.78;
  color: #C9D5E8;
}

.page-about .about-eco__list {
  display: grid;
  gap: var(--s3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-eco__list li {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: var(--s3);
  padding-bottom: var(--s2);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-eco__num {
  font-size: 30px;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-eco__label {
  font-size: 15px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 资质与荣誉 ---------- */
.page-about .about-creds {
  padding: clamp(64px, 9vw, 112px) 0;
  background: linear-gradient(180deg, rgba(14, 23, 48, 0.85) 0%, var(--ink) 100%);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-creds__grid {
  display: grid;
  gap: var(--s3);
}

.page-about .about-cred {
  padding: var(--s4);
  border: 1px solid var(--line-soft);
  border-top: 3px solid var(--gold);
  border-radius: var(--radius);
  background: rgba(22, 36, 74, 0.42);
  box-shadow: var(--shadow-card);
  transition: border-color 220ms ease, transform 220ms ease;
}

.page-about .about-cred:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  border-top-color: var(--gold);
}

.page-about .about-cred .tag {
  margin-bottom: var(--s2);
}

.page-about .about-cred__title {
  margin: 0 0 var(--s2);
  font-family: var(--font-editorial);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-cred__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .about-creds__foot {
  margin: var(--s5) 0 0;
  padding-top: var(--s3);
  border-top: 1px dashed var(--line);
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 品牌主张 ---------- */
.page-about .about-claim {
  position: relative;
  overflow: hidden;
  padding: clamp(72px, 10vw, 140px) 0;
  background:
    radial-gradient(90% 120% at 12% 100%, rgba(43, 231, 214, 0.14) 0%, rgba(7, 12, 26, 0) 62%),
    radial-gradient(80% 110% at 92% 0%, rgba(255, 90, 43, 0.14) 0%, rgba(7, 12, 26, 0) 60%),
    var(--navy);
}

.page-about .about-claim::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(-6deg, rgba(43, 231, 214, 0.05) 0 1px, transparent 1px 14px);
  pointer-events: none;
}

.page-about .about-claim__inner {
  position: relative;
  max-width: 62ch;
}

.page-about .about-claim__title {
  margin: 0 0 var(--s4);
  font-size: clamp(34px, 8vw, 68px);
  line-height: 1.04;
  color: var(--paper);
}

.page-about .about-claim__text {
  margin: 0 0 var(--s4);
  font-size: 18px;
  line-height: 1.78;
  color: #C6D3E9;
}

.page-about .about-claim__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s2);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-archive__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-eco__list li {
    grid-template-columns: 72px 1fr;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: clamp(56px, 6vw, 88px);
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: var(--s6);
    align-items: end;
  }

  .page-about .about-hero .crumbs,
  .page-about .about-hero .kicker,
  .page-about .about-hero__title {
    grid-column: 1 / -1;
  }

  .page-about .about-archive__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--s5);
  }

  .page-about .about-timeline__grid {
    grid-template-columns: 200px minmax(0, 1fr);
    column-gap: var(--s6);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 96px;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 10px;
    overflow: visible;
  }

  .page-about .about-index__list a {
    display: grid;
    grid-template-columns: auto auto;
    grid-template-areas:
      "num year"
      "name name";
    column-gap: 10px;
    row-gap: 2px;
    min-width: 0;
    align-items: baseline;
  }

  .page-about .about-index__num {
    grid-area: num;
  }

  .page-about .about-index__year {
    grid-area: year;
  }

  .page-about .about-index__name {
    grid-area: name;
  }

  .page-about .about-stage {
    padding: var(--s5) var(--s5) var(--s5) calc(var(--s5) + 12px);
  }

  .page-about .about-stages {
    gap: var(--s5);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    column-gap: var(--s6);
    align-items: start;
  }

  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    column-gap: var(--s6);
    align-items: center;
  }

  .page-about .about-creds__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--s4);
  }
}

@media (min-width: 1200px) {
  .page-about .about-timeline__grid {
    grid-template-columns: 220px minmax(0, 1fr);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) 340px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__list a,
  .page-about .about-team__row,
  .page-about .about-cred,
  .page-about .about-stage__more summary::after {
    transition: none;
  }
}