/* ===== 品牌文化页 · page-about ===== */

.page-about {
  background: var(--bg);
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(34px, 6.5vw, 84px) 0 clamp(40px, 7vw, 88px);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  left: -14%;
  top: -34%;
  width: 88%;
  height: 156%;
  pointer-events: none;
  background:
    linear-gradient(112deg, transparent 38%, rgba(53, 230, 224, 0.09) 50%, transparent 62%),
    linear-gradient(112deg, transparent 56%, rgba(139, 92, 246, 0.14) 70%, transparent 84%);
  animation: ab-drift 17s ease-in-out infinite alternate;
}

@keyframes ab-drift {
  from { transform: translate3d(0, 0, 0) rotate(-1deg); }
  to   { transform: translate3d(4%, 2%, 0) rotate(1.6deg); }
}

.page-about .ab-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(30px, 5.5vw, 56px);
  align-items: center;
}

.page-about .ab-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.95rem, 7vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 14px 0 0;
  color: var(--cream);
}

.page-about .ab-hero .lede {
  margin-top: 18px;
  max-width: 54ch;
}

.page-about .ab-hero__stats {
  list-style: none;
  margin: clamp(24px, 4vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .ab-hero__stat {
  padding: 14px 16px;
  border-left: 2px solid var(--line-cyan);
  background: linear-gradient(180deg, rgba(19, 26, 58, 0.78), rgba(19, 26, 58, 0.22));
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
}

.page-about .ab-hero__stat b {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.45rem, 4.6vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--neon-cyan);
  line-height: 1.1;
}

.page-about .ab-hero__stat span {
  display: block;
  margin-top: 5px;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--text-muted);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 4vw, 32px);
}

.page-about .ab-hero__media {
  margin: 0;
}

/* ---------- 发展轨迹 ---------- */
.page-about .ab-story {
  position: relative;
}

.page-about .ab-rail {
  list-style: none;
  margin: clamp(30px, 5vw, 48px) 0 0;
  padding: 0;
}

.page-about .ab-rail__item {
  position: relative;
  display: grid;
  grid-template-columns: 5rem minmax(0, 1fr);
  gap: clamp(12px, 2.4vw, 28px);
  padding-bottom: clamp(30px, 4.4vw, 48px);
}

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

.page-about .ab-rail__item::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1.6rem;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, rgba(53, 230, 224, 0.52), rgba(139, 92, 246, 0.08));
}

.page-about .ab-rail__item:last-child::after {
  display: none;
}

.page-about .ab-rail__mark {
  position: relative;
  padding-left: 1.55rem;
}

.page-about .ab-rail__dot {
  position: absolute;
  left: 0;
  top: 0.42rem;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--neon-cyan);
  box-shadow: 0 0 0 4px rgba(53, 230, 224, 0.14), 0 0 16px rgba(53, 230, 224, 0.55);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .ab-rail__item:hover .ab-rail__dot {
  transform: scale(1.35);
  box-shadow: 0 0 0 6px rgba(53, 230, 224, 0.18), 0 0 24px rgba(53, 230, 224, 0.78);
}

.page-about .ab-rail__year {
  font-family: var(--font-mono);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--neon-cyan);
}

.page-about .ab-rail__content h3 {
  font-family: var(--font-display);
  font-size: clamp(1.12rem, 3vw, 1.42rem);
  line-height: 1.35;
  letter-spacing: -0.01em;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--cream);
}

.page-about .ab-rail__content p {
  margin: 0;
  max-width: 64ch;
  color: var(--text-muted);
  line-height: 1.78;
}

.page-about .ab-figure-card {
  margin-top: 18px;
  padding: 18px 20px;
  max-width: 62ch;
  background: var(--cream);
  color: var(--ink);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-about .ab-figure-card p {
  margin: 0 0 8px;
  color: var(--ink);
  font-size: 0.95rem;
  line-height: 1.7;
}

.page-about .ab-figure-card p:last-child {
  margin-bottom: 0;
}

.page-about .ab-figure-card__no {
  font-family: var(--font-mono);
  font-weight: 700;
  padding: 2px 7px;
  margin-right: 6px;
  border-radius: 4px;
  background: var(--ink);
  color: var(--cream);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}

/* ---------- 两条业务线 ---------- */
.page-about .ab-lines__grid {
  display: grid;
  gap: clamp(18px, 3vw, 26px);
  margin-top: clamp(28px, 4.5vw, 44px);
}

.page-about .ab-line {
  position: relative;
  padding: clamp(24px, 3.6vw, 36px);
}

.page-about .ab-line--visitor {
  background: var(--cream);
  color: var(--ink);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
}

.page-about .ab-line--vendor {
  background: linear-gradient(180deg, rgba(139, 92, 246, 0.2), rgba(19, 26, 58, 0.9));
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius-m);
}

.page-about .ab-line__tag {
  display: inline-block;
  margin: 0 0 14px;
  padding: 4px 12px;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  border-radius: 999px;
}

.page-about .ab-line--visitor .ab-line__tag {
  background: var(--ink);
  color: var(--cream);
}

.page-about .ab-line--vendor .ab-line__tag {
  background: rgba(53, 230, 224, 0.16);
  color: var(--neon-cyan);
  border: 1px solid var(--line-cyan);
}

.page-about .ab-line h3 {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3.4vw, 1.6rem);
  line-height: 1.32;
  letter-spacing: -0.015em;
  font-weight: 700;
  margin: 0 0 14px;
}

.page-about .ab-line--visitor h3 { color: var(--ink); }
.page-about .ab-line--vendor h3 { color: var(--cream); }

.page-about .ab-line > p {
  margin: 0;
  line-height: 1.78;
  max-width: 58ch;
}

.page-about .ab-line--visitor > p { color: #4a3c33; }
.page-about .ab-line--vendor > p { color: var(--text-muted); }

.page-about .ab-line__list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-line__list li {
  position: relative;
  padding-left: 22px;
  font-size: 0.95rem;
  line-height: 1.72;
}

.page-about .ab-line__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  transform: rotate(45deg);
}

.page-about .ab-line--visitor .ab-line__list li { color: #4a3c33; }
.page-about .ab-line--visitor .ab-line__list li::before { background: var(--warm-orange); }

.page-about .ab-line--vendor .ab-line__list li { color: var(--text-muted); }
.page-about .ab-line--vendor .ab-line__list li::before { background: var(--neon-cyan); }

.page-about .ab-line--vendor .btn {
  margin-top: 22px;
}

/* ---------- 收录流程 ---------- */
.page-about .ab-steps {
  list-style: none;
  margin: clamp(28px, 4.5vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.4vw, 22px);
}

.page-about .ab-step {
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 3px solid var(--violet);
  padding: 24px 22px 26px;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .ab-step:hover {
  transform: translateY(-5px);
  border-color: var(--line-cyan);
}

.page-about .ab-step__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  letter-spacing: 0.14em;
  color: var(--neon-cyan);
  margin-bottom: 12px;
}

.page-about .ab-step h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  line-height: 1.4;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--cream);
}

.page-about .ab-step p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.76;
  color: var(--text-muted);
}

.page-about .ab-verify__note {
  margin: clamp(24px, 3.4vw, 34px) 0 0;
  padding: 16px 20px;
  border-left: 3px solid var(--neon-cyan);
  background: rgba(53, 230, 224, 0.06);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--text-muted);
  max-width: 80ch;
}

/* ---------- 团队 ---------- */
.page-about .ab-team__top {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-about .ab-team__copy .lede {
  margin-top: 16px;
}

.page-about .ab-team__copy p:last-child {
  margin-top: 16px;
  max-width: 60ch;
  color: var(--text-muted);
  line-height: 1.78;
}

.page-about .ab-team__media {
  margin: 0;
}

.page-about .ab-team__crews {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: clamp(28px, 4.5vw, 42px);
}

.page-about .ab-crew {
  background: rgba(19, 26, 58, 0.72);
  border: 1px solid var(--line);
  border-left: 3px solid var(--neon-cyan);
  padding: 18px 18px 20px;
  transition: transform 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .ab-crew:hover {
  transform: translateY(-4px);
  background: rgba(19, 26, 58, 0.95);
}

.page-about .ab-crew h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
  color: var(--neon-cyan);
}

.page-about .ab-crew p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--text-muted);
}

/* ---------- 年度观察 ---------- */
.page-about .ab-annual {
  position: relative;
  margin-top: clamp(20px, 3vw, 36px);
}

.page-about .ab-annual__band {
  display: block;
  margin: 0;
  position: relative;
  overflow: hidden;
  aspect-ratio: 2.4 / 1;
}

.page-about .ab-annual__band img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .ab-annual__band::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 16, 38, 0.12), rgba(11, 16, 38, 0.94));
}

.page-about .ab-annual__inner {
  position: relative;
  padding-top: clamp(26px, 4vw, 44px);
  padding-bottom: clamp(34px, 5vw, 60px);
}

.page-about .ab-annual__inner h2 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 4.4vw, 2.2rem);
  line-height: 1.24;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 12px 0 0;
  color: var(--cream);
}

.page-about .ab-annual__inner .lede {
  margin-top: 16px;
  max-width: 66ch;
}

.page-about .ab-annual__grid {
  display: grid;
  gap: 14px;
  margin: clamp(24px, 3.6vw, 34px) 0 clamp(24px, 3.6vw, 32px);
}

.page-about .ab-annual__item {
  padding: 16px 18px;
  border-top: 2px solid var(--violet);
  background: linear-gradient(180deg, rgba(139, 92, 246, 0.14), rgba(19, 26, 58, 0.4));
}

.page-about .ab-annual__item b {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.2rem, 3.6vw, 1.6rem);
  font-weight: 700;
  color: var(--cream);
  letter-spacing: -0.01em;
}

.page-about .ab-annual__item span {
  display: block;
  margin-top: 6px;
  font-size: 0.84rem;
  line-height: 1.6;
  color: var(--text-muted);
}

/* ---------- 合作生态 ---------- */
.page-about .ab-partners__grid {
  list-style: none;
  margin: clamp(30px, 5vw, 48px) 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .ab-partner {
  position: relative;
  padding: 22px 20px;
  background: linear-gradient(180deg, rgba(139, 92, 246, 0.16), rgba(19, 26, 58, 0.92));
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .ab-partner:hover,
.page-about .ab-partner:focus {
  transform: translateY(-5px);
  border-color: var(--line-cyan);
  outline: 2px solid var(--neon-cyan);
  outline-offset: 3px;
}

.page-about .ab-partner h3 {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
  color: var(--cream);
}

.page-about .ab-partner .meta {
  margin: 0;
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: var(--neon-cyan);
}

.page-about .ab-partner__more {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.38s var(--ease), opacity 0.28s var(--ease), margin-top 0.38s var(--ease);
}

.page-about .ab-partner:hover .ab-partner__more,
.page-about .ab-partner:focus .ab-partner__more {
  max-height: 240px;
  opacity: 1;
  margin-top: 14px;
}

.page-about .ab-partner__more p {
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--text-muted);
}

.page-about .ab-partners__note {
  margin: clamp(24px, 3.6vw, 34px) auto 0;
  max-width: 70ch;
  text-align: center;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-muted);
}

/* ---------- 收尾 ---------- */
.page-about .ab-cta__inner {
  padding: clamp(28px, 5vw, 52px) clamp(22px, 4vw, 48px);
  background:
    linear-gradient(125deg, rgba(53, 230, 224, 0.14), rgba(139, 92, 246, 0.18) 52%, rgba(255, 138, 61, 0.14));
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius-l);
  text-align: center;
}

.page-about .ab-cta__inner h2 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 4.2vw, 2rem);
  line-height: 1.26;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 0;
  color: var(--cream);
}

.page-about .ab-cta__inner p {
  margin: 16px auto 0;
  max-width: 62ch;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--text-muted);
}

.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: clamp(22px, 3.4vw, 30px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .ab-annual__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .ab-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .ab-annual__band {
    aspect-ratio: 4 / 1;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-about .ab-lines__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }

  .page-about .ab-team__top {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-about .ab-rail__item {
    grid-template-columns: 6rem minmax(0, 1fr);
  }
}

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

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

@media (max-width: 480px) {
  .page-about .ab-team__crews {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .ab-rail__item {
    grid-template-columns: 3.9rem minmax(0, 1fr);
    gap: 10px;
  }

  .page-about .ab-rail__mark {
    padding-left: 1.35rem;
  }

  .page-about .ab-rail__year {
    font-size: 0.92rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-hero::before {
    animation: none;
  }

  .page-about .ab-rail__dot,
  .page-about .ab-step,
  .page-about .ab-crew,
  .page-about .ab-partner,
  .page-about .ab-partner__more {
    transition: none;
  }

  .page-about .ab-step:hover,
  .page-about .ab-crew:hover,
  .page-about .ab-partner:hover,
  .page-about .ab-partner:focus {
    transform: none;
  }
}