/* ================= 品牌总览页 ================= */
.page-about {
  --about-gridline: rgba(28, 34, 48, .62);
  --about-cyan-glow: rgba(0, 229, 255, .16);
  --about-violet-glow: rgba(177, 75, 255, .14);
  --about-red-glow: rgba(228, 0, 43, .2);
  position: relative;
  background: var(--ink-0);
  color: var(--text);
  overflow-x: clip;
}

.page-about .about-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 24px;
  padding-bottom: 14px;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-head__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 3.2vw, 42px);
  letter-spacing: -.02em;
  line-height: 1.1;
  margin: 0;
}

.page-about .about-head__note {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
  white-space: nowrap;
}

.page-about .about-head--on-teal,
.page-about .about-head--on-indigo {
  border-bottom-color: rgba(232, 237, 245, .18);
}

.page-about .about-lead {
  font-size: 17px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 68ch;
  margin: 0 0 34px;
}

.page-about .about-inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, .4);
}

.page-about .about-inline-link:hover {
  color: var(--text);
  border-bottom-color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 40px 0 64px;
  border-top: 1px solid var(--line);
  border-bottom: 2px solid var(--line);
  background:
    radial-gradient(760px 420px at 6% -14%, var(--about-cyan-glow), transparent 68%),
    radial-gradient(680px 380px at 94% 2%, var(--about-violet-glow), transparent 68%),
    var(--ink-0);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--about-gridline) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-gridline) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: .4;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  display: grid;
  gap: 40px;
}

.page-about .about-hero__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 72px);
  line-height: 1.04;
  letter-spacing: -.025em;
  margin: 14px 0 0;
}

.page-about .about-hero__lede {
  margin: 22px 0 0;
  max-width: 60ch;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow-hard-sm);
}

.page-about .about-hero__stat {
  background: var(--ink-1);
  padding: 18px 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-hero__stat-num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--cyan);
  line-height: 1;
}

.page-about .about-hero__stat:nth-child(2) .about-hero__stat-num {
  color: var(--red);
}

.page-about .about-hero__stat:nth-child(3) .about-hero__stat-num {
  color: var(--violet);
}

.page-about .about-hero__stat-unit {
  font-size: .58em;
  margin-left: 2px;
}

.page-about .about-hero__stat-label {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--muted);
  letter-spacing: .02em;
}

/* ---------- 四条业务主线 ---------- */
.page-about .about-lines {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .about-line {
  position: relative;
  padding: 26px 22px 24px;
  background: var(--ink-1);
  border: 2px solid var(--line-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard-sm);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}

.page-about .about-line:hover {
  transform: translate(-3px, -3px);
  border-color: var(--red);
  box-shadow: 10px 10px 0 rgba(228, 0, 43, .22);
}

.page-about .about-line__idx {
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--line-strong);
  letter-spacing: .02em;
}

.page-about .about-line__title {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -.01em;
  margin: 0;
}

.page-about .about-line__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  flex: 1 1 auto;
}

.page-about .about-line .tag {
  align-self: flex-start;
}

/* ---------- 发展历程 ---------- */
.page-about .about-history {
  position: relative;
  background:
    radial-gradient(600px 300px at 88% 6%, var(--about-violet-glow), transparent 70%),
    var(--ink-0);
}

.page-about .about-history__figure {
  margin: 0 0 56px;
}

.page-about .about-vertical {
  display: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--muted);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  position: absolute;
  right: 8px;
  top: 120px;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  gap: 10px;
  padding: 26px 0 30px 30px;
  border-left: 2px solid var(--line);
}

.page-about .about-timeline__item:last-child {
  border-left-color: var(--red);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -9px;
  top: 32px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink-0);
  border: 2px solid var(--red);
  box-shadow: 0 0 0 3px rgba(0, 229, 255, .16);
  transition: background .25s ease, box-shadow .25s ease, transform .25s ease;
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus-within::before {
  background: var(--cyan);
  box-shadow: 0 0 0 6px rgba(0, 229, 255, .2), 0 0 20px rgba(0, 229, 255, .55);
  transform: scale(1.12);
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-size: clamp(40px, 10vw, 62px);
  font-weight: 700;
  line-height: .9;
  letter-spacing: -.02em;
  color: var(--line-strong);
  transition: color .3s ease, text-shadow .3s ease;
}

.page-about .about-timeline__item:hover .about-timeline__year,
.page-about .about-timeline__item:focus-within .about-timeline__year {
  color: var(--cyan);
  text-shadow: 0 0 22px rgba(0, 229, 255, .45);
}

.page-about .about-timeline__body {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}

.page-about .about-timeline__title {
  font-family: var(--font-head);
  font-size: clamp(19px, 2.2vw, 26px);
  font-weight: 800;
  letter-spacing: -.01em;
  margin: 0;
}

.page-about .about-timeline__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 62ch;
}

.page-about .about-timeline__tag {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--cyan);
  border: 1px solid rgba(0, 229, 255, .35);
  padding: 4px 10px;
  border-radius: 2px;
  transition: background .25s ease, color .25s ease;
}

.page-about .about-timeline__item:hover .about-timeline__tag {
  background: rgba(0, 229, 255, .12);
  color: var(--text);
}

/* ---------- 服务版图 ---------- */
.page-about .about-coverage {
  background:
    radial-gradient(560px 300px at 8% 10%, var(--about-cyan-glow), transparent 72%),
    var(--ink-0);
}

.page-about .about-coverage__figure {
  margin: 0 0 34px;
}

.page-about .about-regions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-region {
  padding: 22px 20px 24px;
  background: var(--ink-1);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color .25s ease, background .25s ease, transform .25s ease;
}

.page-about .about-region:hover {
  border-color: var(--cyan);
  transform: translateY(-4px);
}

.page-about .about-region--key {
  border-color: rgba(0, 229, 255, .5);
  background:
    linear-gradient(180deg, rgba(0, 229, 255, .07), transparent 60%),
    var(--ink-1);
}

.page-about .about-region__dots {
  color: var(--muted);
  margin-bottom: 6px;
}

.page-about .about-region--key .about-region__dots {
  color: var(--cyan);
}

.page-about .about-region__dots svg {
  display: block;
  width: 78px;
  height: auto;
}

.page-about .about-region__name {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 800;
  margin: 0;
  letter-spacing: -.01em;
}

.page-about .about-region__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .05em;
  color: var(--violet);
}

.page-about .about-region__desc {
  margin: 4px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 支持团队 ---------- */
.page-about .about-team__inner {
  display: grid;
  gap: 34px;
}

.page-about .about-head--inline {
  margin-bottom: 22px;
}

.page-about .about-team__list {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 2px solid var(--line-strong);
}

.page-about .about-team__list li {
  background: var(--ink-1);
  padding: 16px 18px;
  display: grid;
  gap: 6px;
}

.page-about .about-team__key {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--red);
}

.page-about .about-team__val {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text);
}

.page-about .about-hours {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 14px 18px;
  border: 2px solid rgba(245, 194, 75, .38);
  border-radius: var(--radius);
  background: rgba(245, 194, 75, .06);
}

.page-about .about-hours__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(245, 194, 75, .16);
}

.page-about .about-hours__label {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: .04em;
}

.page-about .about-hours__time {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  color: var(--amber);
  letter-spacing: .04em;
}

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

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

/* ---------- 备案与合规 ---------- */
.page-about .about-compliance__inner {
  display: grid;
  gap: 22px;
}

.page-about .about-compliance__card {
  padding: 26px 24px 28px;
  background: rgba(11, 14, 19, .55);
  border: 2px solid var(--line-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard-sm);
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
}

.page-about .about-compliance__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--muted);
}

.page-about .about-compliance__value {
  font-family: var(--font-mono);
  font-size: clamp(20px, 3.4vw, 28px);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--cyan);
  margin: 0;
  word-break: break-all;
}

.page-about .about-compliance__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-copy {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--text);
  background: transparent;
  border: 2px solid var(--red);
  border-radius: var(--radius);
  padding: 9px 16px;
  cursor: pointer;
  transition: background .2s ease, color .2s ease;
}

.page-about .about-copy:hover {
  background: var(--red);
  color: #fff;
}

.page-about .about-compliance__side {
  padding: 24px 22px 26px;
  border-left: 4px solid var(--cyan);
  background: rgba(11, 14, 19, .4);
  border-radius: var(--radius);
}

.page-about .about-compliance__side-title {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 800;
  margin: 0 0 12px;
  letter-spacing: -.01em;
}

.page-about .about-compliance__side p {
  margin: 0 0 18px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-compliance__steps {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-compliance__steps li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text);
  align-items: start;
}

.page-about .about-compliance__steps .num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--cyan);
  border: 1px solid rgba(0, 229, 255, .35);
  border-radius: 2px;
  padding: 4px 0;
  text-align: center;
}

.page-about .about-compliance__btn {
  align-self: flex-start;
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-eco__card {
  padding: 24px 22px 26px;
  background: rgba(11, 14, 19, .48);
  border: 2px solid rgba(177, 75, 255, .28);
  border-radius: var(--radius);
  transition: border-color .25s ease, transform .25s ease;
}

.page-about .about-eco__card:hover {
  border-color: var(--violet);
  transform: translateY(-4px);
}

.page-about .about-eco__title {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 800;
  margin: 0 0 12px;
  letter-spacing: -.01em;
}

.page-about .about-eco__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

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

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  position: relative;
  padding: 60px 0 72px;
  border-top: 2px solid var(--line-strong);
  background:
    radial-gradient(700px 340px at 82% 0%, var(--about-red-glow), transparent 70%),
    radial-gradient(560px 280px at 10% 100%, var(--about-cyan-glow), transparent 72%),
    var(--ink-0);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 26px;
}

.page-about .about-cta__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(26px, 4vw, 48px);
  line-height: 1.1;
  letter-spacing: -.02em;
  margin: 0 0 14px;
}

.page-about .about-cta__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 56ch;
}

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

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 56px 0 84px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: 52px;
  }

  .page-about .about-team__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: 48px;
  }

  .page-about .about-compliance__inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
    gap: 28px;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
    gap: 40px;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 44px;
    padding: 40px 0 40px 48px;
  }

  .page-about .about-timeline__item::before {
    top: 50px;
  }

  .page-about .about-timeline__year {
    font-size: 84px;
  }

  .page-about .about-vertical {
    display: block;
  }
}

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

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-line,
  .page-about .about-region,
  .page-about .about-eco__card,
  .page-about .about-timeline__item::before,
  .page-about .about-timeline__year,
  .page-about .about-timeline__tag {
    transition: none;
  }

  .page-about .about-line:hover,
  .page-about .about-region:hover,
  .page-about .about-eco__card:hover {
    transform: none;
  }

  .page-about .about-timeline__item:hover::before,
  .page-about .about-timeline__item:focus-within::before {
    transform: none;
  }
}