/* ===== 品牌总览 / page-about ===== */
.page-about {
  --about-line: rgba(138, 150, 174, 0.26);
  --about-line-strong: rgba(138, 150, 174, 0.46);
  --about-gap: clamp(52px, 7vw, 100px);
  color: var(--ink);
  padding-bottom: clamp(40px, 6vw, 88px);
}

/* 面包屑间距 */
.page-about .breadcrumb {
  padding-top: clamp(18px, 2.4vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4.4vw, 52px) 0 clamp(40px, 5.6vw, 76px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -32%;
  right: -18%;
  width: min(760px, 96vw);
  height: min(760px, 96vw);
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(231, 184, 92, 0.15), rgba(242, 145, 58, 0.06) 46%, transparent 68%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(231, 184, 92, 0.45) 22%, rgba(86, 211, 230, 0.35) 74%, transparent);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4.6vw, 52px);
}

.page-about .about-hero__kicker {
  margin: 0 0 clamp(14px, 1.8vw, 22px);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-hero__title {
  margin: 0 0 clamp(18px, 2.4vw, 26px);
  font-size: clamp(32px, 6.2vw, 64px);
  font-weight: 300;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__title strong {
  font-weight: 800;
  letter-spacing: -0.035em;
  color: var(--gold);
}

.page-about .about-hero__lede {
  max-width: 40ch;
  margin: 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--ink);
}

.page-about .about-hero__index {
  position: relative;
  align-self: end;
  padding: 20px 20px 14px;
  background: linear-gradient(158deg, rgba(30, 35, 64, 0.92), rgba(16, 26, 46, 0.72));
  border: 1px solid var(--about-line);
  box-shadow: 8px 8px 0 rgba(7, 11, 20, 0.55);
}

.page-about .about-hero__index::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 52px;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--amber));
}

.page-about .about-hero__index-label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--paper);
}

.page-about .about-hero__index ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-hero__index li {
  border-top: 1px solid var(--about-line);
}

.page-about .about-hero__index li:last-child {
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-hero__index a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 9px 2px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink);
  text-decoration: none;
  transition: color 0.22s var(--ease), padding-left 0.22s var(--ease);
}

.page-about .about-hero__index a:hover,
.page-about .about-hero__index a:focus-visible {
  color: var(--gold);
  padding-left: 8px;
}

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

/* ---------- 通用分节头 ---------- */
.page-about .about-block {
  padding-top: var(--about-gap);
}

.page-about .about-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px 16px;
  padding-bottom: 14px;
  margin-bottom: clamp(22px, 3.2vw, 38px);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-head__num {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .about-head h2 {
  margin: 0;
  font-size: clamp(21px, 3vw, 31px);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--paper);
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 44px);
}

.page-about .about-origin__copy p {
  margin: 0 0 1.15em;
  max-width: 38ch;
  font-size: 16px;
  line-height: 1.78;
}

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

.page-about .about-origin__side {
  padding: 24px 22px 20px;
}

.page-about .about-origin__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-origin__list li {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-origin__list li:first-child {
  border-top: 0;
  padding-top: 0;
}

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

.page-about .about-origin__num {
  font-size: 24px;
  line-height: 1.1;
  color: var(--amber);
}

.page-about .about-origin__list b {
  display: block;
  font-size: 14px;
  color: var(--paper);
  margin-bottom: 3px;
}

.page-about .about-origin__list p {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 02 时间轴 ---------- */
.page-about .about-track {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 70px;
  width: 1px;
  background: linear-gradient(180deg, rgba(231, 184, 92, 0.9), rgba(242, 145, 58, 0.55) 52%, rgba(86, 211, 230, 0.35));
}

.page-about .about-stage {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  column-gap: 42px;
  padding-bottom: clamp(30px, 4.4vw, 48px);
}

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

.page-about .about-stage__year {
  padding-top: 2px;
  text-align: right;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--gold);
}

.page-about .about-stage__body {
  position: relative;
}

.page-about .about-stage__body::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(231, 184, 92, 0.16), 0 0 14px rgba(231, 184, 92, 0.45);
}

.page-about .about-stage:last-child .about-stage__body::before {
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(242, 145, 58, 0.18), 0 0 16px rgba(242, 145, 58, 0.55);
}

.page-about .about-stage__body h3 {
  margin: 0 0 8px;
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-stage__body p {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink);
}

/* ---------- 03 规模 ---------- */
.page-about .about-scale {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .about-scale__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(20px, 2.6vw, 30px) clamp(16px, 2vw, 24px);
  background: var(--night);
  transition: background 0.3s var(--ease);
}

.page-about .about-scale__item:hover {
  background: #16233c;
}

.page-about .about-scale__num {
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--gold);
}

.page-about .about-scale__unit {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--mist);
}

.page-about .about-scale__label {
  font-size: 14px;
  color: var(--paper);
}

.page-about .about-scale__note {
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 04 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 3.6vw, 44px);
}

.page-about .about-team__copy > p {
  margin: 0 0 clamp(20px, 2.6vw, 30px);
  max-width: 40ch;
  font-size: 16px;
  line-height: 1.78;
}

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 16px;
  padding: 16px 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-team__row:last-child {
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-team__num {
  font-size: 26px;
  line-height: 1.05;
  color: var(--cyan);
}

.page-about .about-team__row h3 {
  margin: 0 0 5px;
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-team__row p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ink);
}

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

/* ---------- 05 覆盖 ---------- */
.page-about .about-reach__band {
  background:
    radial-gradient(130% 190% at 12% 130%, rgba(242, 145, 58, 0.2), transparent 62%),
    radial-gradient(90% 140% at 96% -20%, rgba(86, 211, 230, 0.12), transparent 60%),
    linear-gradient(180deg, rgba(30, 35, 64, 0.88), rgba(7, 11, 20, 0.96));
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
  padding: clamp(34px, 5vw, 62px) 0;
}

.page-about .about-reach__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 46px);
  align-items: center;
}

.page-about .about-reach__num {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .about-reach__copy h2 {
  margin: 0 0 14px;
  font-size: clamp(21px, 3vw, 31px);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-about .about-reach__copy > p:last-child {
  margin: 0;
  max-width: 40ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink);
}

.page-about .about-nodes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 22px 8px;
}

.page-about .about-nodes li {
  position: relative;
  height: 10px;
}

.page-about .about-nodes li::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 8px;
  height: 8px;
  margin: -4px 0 0 -4px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 12px rgba(242, 145, 58, 0.55);
}

.page-about .about-nodes li:nth-child(3n)::before {
  background: var(--gold);
  box-shadow: 0 0 12px rgba(231, 184, 92, 0.55);
}

.page-about .about-nodes li:nth-child(4n + 1)::before {
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(86, 211, 230, 0.45);
}

.page-about .about-reach__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 44px);
  margin-top: clamp(26px, 3.6vw, 44px);
}

.page-about .about-reach__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-reach__list li {
  padding: 16px 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-reach__list li:last-child {
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-reach__list h3 {
  margin: 0 0 5px;
  font-size: 15px;
  font-weight: 700;
  color: var(--gold);
}

.page-about .about-reach__list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ink);
}

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

/* ---------- 06 安全 ---------- */
.page-about .about-security {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 44px);
}

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

.page-about .about-security__copy > p {
  margin: 0 0 clamp(20px, 2.6vw, 28px);
  max-width: 42ch;
  font-size: 16px;
  line-height: 1.78;
}

.page-about .about-security__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-security__list li {
  padding: 16px 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-security__list li:last-child {
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-security__key {
  display: inline-block;
  margin-bottom: 6px;
  padding: 3px 9px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--void);
  background: var(--paper);
}

.page-about .about-security__list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--ink);
}

/* ---------- 07 合作 ---------- */
.page-about .about-partners__intro {
  max-width: 48ch;
  margin: 0 0 clamp(22px, 3vw, 34px);
  font-size: 16px;
  line-height: 1.78;
}

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

.page-about .about-partners__item {
  padding: clamp(20px, 2.6vw, 30px) clamp(18px, 2.2vw, 26px);
  background: var(--night);
  transition: background 0.3s var(--ease);
}

.page-about .about-partners__item:hover {
  background: #16233c;
}

.page-about .about-partners__tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 9px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  border: 1px solid rgba(86, 211, 230, 0.4);
}

.page-about .about-partners__item h3 {
  margin: 0 0 9px;
  font-size: clamp(15px, 1.8vw, 17px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .about-partners__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--ink);
}

/* ---------- 08 理由 ---------- */
.page-about .about-why {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 2.6vw, 30px);
  counter-reset: none;
}

.page-about .about-why__item {
  position: relative;
  padding: clamp(20px, 2.6vw, 28px) clamp(18px, 2.2vw, 26px);
  border: 1px solid var(--about-line);
  border-left: 2px solid var(--gold);
  background: linear-gradient(150deg, rgba(30, 35, 64, 0.62), rgba(7, 11, 20, 0.4));
}

.page-about .about-why__num {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-why__item h3 {
  margin: 0 0 9px;
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-why__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--ink);
}

/* ---------- 结尾入口 ---------- */
.page-about .about-next__panel {
  position: relative;
  padding: clamp(28px, 4vw, 48px) clamp(22px, 3vw, 42px);
  background:
    radial-gradient(120% 200% at 100% 120%, rgba(242, 145, 58, 0.18), transparent 60%),
    linear-gradient(160deg, rgba(30, 35, 64, 0.9), rgba(16, 26, 46, 0.7));
  border: 1px solid var(--about-line);
  box-shadow: 8px 8px 0 rgba(7, 11, 20, 0.5);
}

.page-about .about-next__panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 96px;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--amber), var(--cyan));
}

.page-about .about-next__panel h2 {
  margin: 0 0 12px;
  font-size: clamp(21px, 3vw, 30px);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-about .about-next__panel p {
  max-width: 40ch;
  margin: 0 0 clamp(20px, 2.6vw, 30px);
  font-size: 15px;
  line-height: 1.76;
  color: var(--ink);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-scale {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(36px, 5vw, 64px);
  }

  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .about-reach__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
  }

  .page-about .about-reach__grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.25fr);
    align-items: start;
  }

  .page-about .about-security {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }
}

@media (min-width: 1120px) {
  .page-about .about-hero__title {
    font-size: clamp(48px, 5.4vw, 64px);
  }
}

/* ---------- 窄屏收口 ---------- */
@media (max-width: 479px) {
  .page-about .about-track::before {
    left: 52px;
  }

  .page-about .about-stage {
    grid-template-columns: 42px minmax(0, 1fr);
    column-gap: 30px;
  }

  .page-about .about-stage__body::before {
    left: -25px;
    width: 9px;
    height: 9px;
  }

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

  .page-about .about-nodes {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px 8px;
  }

  .page-about .about-next__links .btn {
    flex: 1 1 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__index a,
  .page-about .about-scale__item,
  .page-about .about-partners__item {
    transition: none;
  }
}