.page-about {
  background: var(--color-mist);
  color: var(--color-ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  margin-top: var(--space-3);
}

/* ===== 页面横幅 ===== */
.page-about__banner {
  position: relative;
  color: #fff;
  background: linear-gradient(135deg, #0B1740 0%, var(--color-navy) 50%, #1B3A7A 100%);
  padding: 64px 0 88px;
  overflow: hidden;
}

.page-about__banner::before {
  content: "";
  position: absolute;
  right: -12%;
  top: -30%;
  width: 55%;
  height: 170%;
  background:
    radial-gradient(ellipse 70% 30% at 70% 25%, rgba(0, 229, 255, 0.16), transparent 60%),
    radial-gradient(ellipse 55% 28% at 45% 70%, rgba(255, 210, 0, 0.10), transparent 60%);
  transform: rotate(-14deg);
  pointer-events: none;
}

.page-about__banner-inner {
  position: relative;
  display: grid;
  gap: var(--space-4);
}

.page-about__banner-copy {
  display: grid;
  gap: var(--space-3);
  max-width: 860px;
}

.page-about__banner-kicker {
  font-family: var(--font-data);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-cyan);
  margin: 0;
}

.page-about__banner h1 {
  color: #fff;
  font-size: clamp(2.4rem, 6vw, 4rem);
  line-height: 1.15;
  margin: 0;
}

.page-about__banner-lead {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-yellow);
  margin: 0;
}

.page-about__banner-desc {
  max-width: 56ch;
  color: rgb(255 255 255 / 0.85);
  font-size: var(--text-base);
  line-height: 1.85;
  margin: 0;
}

.page-about__banner-note {
  display: none;
}

/* ===== 章节共用 ===== */
.page-about .exhibit {
  position: relative;
  padding: var(--space-6) 0;
}

.page-about .exhibit__number {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(5rem, 14vw, 9rem);
  line-height: 0.8;
  color: var(--color-navy);
  opacity: 0.15;
  z-index: 3;
  pointer-events: none;
}

.page-about__section-head {
  max-width: 780px;
  margin-bottom: var(--space-5);
}

.page-about__section-kicker {
  margin: 0 0 var(--space-2);
}

.page-about__section-link {
  margin-top: var(--space-5);
  padding: var(--space-3) var(--space-4);
  background: rgba(15, 31, 75, 0.04);
  border-left: 4px solid var(--color-yellow);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: var(--text-sm);
  max-width: 720px;
}

.page-about__section-link a {
  color: var(--color-navy);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--color-cyan);
  text-underline-offset: 4px;
  transition: color var(--transition);
}

.page-about__section-link a:hover {
  color: var(--color-cyan);
}

/* ===== 01 品牌故事 ===== */
.page-about__story {
  background: var(--color-mist);
}

.page-about__timeline {
  position: relative;
}

.page-about__timeline-figure {
  margin: 0 0 var(--space-5);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.page-about__timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about__timeline-list::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-yellow) 0%, var(--color-cyan) 70%, transparent 100%);
}

.page-about__timeline-item {
  position: relative;
  padding-left: 52px;
  margin-bottom: var(--space-5);
}

.page-about__timeline-item:last-child {
  margin-bottom: 0;
}

.page-about__timeline-marker {
  position: absolute;
  left: 3px;
  top: 10px;
  width: 26px;
  height: 26px;
}

.page-about__timeline-node {
  display: block;
  width: 14px;
  height: 14px;
  margin: 6px auto;
  border-radius: 50%;
  background: var(--color-yellow);
  border: 3px solid var(--color-cyan);
  box-shadow: 0 0 0 4px rgba(255, 210, 0, 0.25);
  transition: transform var(--transition), box-shadow var(--transition);
}

.page-about__timeline-item:hover .page-about__timeline-node,
.page-about__timeline-item:focus-within .page-about__timeline-node {
  transform: scale(1.3);
  box-shadow: 0 0 0 9px rgba(0, 229, 255, 0.28);
}

.page-about__timeline-card {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: var(--space-4);
  box-shadow: 0 2px 14px rgba(15, 31, 75, 0.05);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.page-about__timeline-item:hover .page-about__timeline-card,
.page-about__timeline-item:focus-within .page-about__timeline-card {
  transform: translateY(-4px);
  border-color: var(--color-cyan);
  box-shadow: var(--shadow-hover);
}

.page-about__timeline-year {
  display: inline-block;
  font-family: var(--font-data);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-navy);
  background: var(--color-yellow);
  border-radius: 999px;
  padding: 2px 12px;
  margin-bottom: var(--space-2);
}

.page-about__timeline-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  margin: 0 0 var(--space-2);
}

.page-about__timeline-text {
  font-size: var(--text-sm);
  color: var(--color-slate);
  line-height: 1.8;
  margin: 0;
}

/* ===== 02 数据能力 ===== */
.page-about__data {
  background: linear-gradient(180deg, var(--color-navy) 0%, #132A5E 100%);
  color: #fff;
}

.page-about__data .exhibit__number,
.page-about__compliance .exhibit__number {
  color: var(--color-cyan);
  opacity: 0.28;
}

.page-about__data .exhibit__title,
.page-about__compliance .exhibit__title {
  color: #fff;
}

.page-about__data .exhibit__desc,
.page-about__compliance .exhibit__desc {
  color: rgb(255 255 255 / 0.78);
}

.page-about .stat-grid {
  display: grid;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.page-about .stat-tile {
  background: rgb(255 255 255 / 0.07);
  border: 1px solid rgb(255 255 255 / 0.14);
  border-radius: var(--radius);
  padding: var(--space-4);
  transition: border-color var(--transition), transform var(--transition), background var(--transition);
}

.page-about .stat-tile:hover {
  border-color: var(--color-cyan);
  background: rgb(255 255 255 / 0.12);
  transform: translateY(-3px);
}

.page-about .stat-tile__value {
  display: block;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.1;
  color: #fff;
}

.page-about .stat-tile--yellow .stat-tile__value {
  color: var(--color-yellow);
}

.page-about .stat-tile--purple .stat-tile__value {
  color: var(--color-purple);
}

.page-about .stat-tile__label {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: rgb(255 255 255 / 0.8);
}

.page-about__data-panel {
  background: rgb(255 255 255 / 0.95);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  border: 1px solid rgb(255 255 255 / 0.4);
}

.page-about__data-grid {
  display: grid;
  gap: var(--space-5);
}

.page-about__data-panel-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-navy);
  margin: 0 0 var(--space-3);
}

.page-about__meter-block {
  margin-bottom: var(--space-4);
}

.page-about .data-track-wrap {
  display: grid;
  grid-template-columns: 64px 1fr auto;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.page-about .data-track-label,
.page-about .data-track-value {
  font-size: var(--text-xs);
  color: var(--color-ink);
}

.page-about .data-track {
  background: rgb(15 31 75 / 0.08);
  border-radius: 999px;
  height: 8px;
  overflow: hidden;
}

.page-about .data-track__fill {
  height: 100%;
  width: var(--value);
  background: linear-gradient(90deg, var(--color-cyan), var(--color-yellow));
  border-radius: 999px;
}

.page-about .data-track__fill.is-animated {
  width: 0;
  animation: page-about-meter 1.2s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

@keyframes page-about-meter {
  to {
    width: var(--value);
  }
}

.page-about__data-table {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about__data-table .data-table {
  width: 100%;
  font-size: var(--text-sm);
}

.page-about__table-note {
  margin: var(--space-3) 0 0;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-line);
  color: var(--color-slate);
  font-size: var(--text-sm);
}

.page-about__table-note a {
  color: var(--color-navy);
  font-weight: 700;
}

.page-about__data-aside {
  display: grid;
  gap: var(--space-3);
  align-content: start;
}

.page-about__data-img {
  border-radius: var(--radius);
  overflow: hidden;
  margin: 0;
}

.page-about .placard {
  background: rgba(15, 31, 75, 0.05);
  border-left: 4px solid var(--color-cyan);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: var(--space-3) var(--space-4);
}

.page-about .placard__label {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-navy);
}

.page-about .placard__data {
  display: block;
  margin-top: 2px;
  font-family: var(--font-data);
  font-weight: 700;
  color: var(--color-ink);
}

.page-about__data .page-about__section-link {
  background: rgb(255 255 255 / 0.08);
  border-left-color: var(--color-cyan);
}

.page-about__data .page-about__section-link a {
  color: var(--color-cyan);
}

/* ===== 03 服务理念 ===== */
.page-about__values {
  background: var(--color-mist);
}

.page-about__values-grid {
  display: grid;
  gap: var(--space-3);
}

.page-about__value-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: var(--space-5) var(--space-4) var(--space-4);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

.page-about__value-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-purple);
  box-shadow: var(--shadow-hover);
}

.page-about__value-no {
  position: absolute;
  top: 6px;
  right: 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 3.5rem;
  line-height: 1;
  color: var(--color-mist);
}

.page-about__value-icon {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-sm);
  background: rgba(123, 97, 255, 0.12);
  color: var(--color-purple);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-3);
  flex: 0 0 auto;
}

.page-about__value-title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
}

.page-about__value-text {
  margin: 0 0 var(--space-4);
  color: var(--color-slate);
  font-size: var(--text-sm);
  line-height: 1.8;
  flex-grow: 1;
}

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

/* ===== 定价块 ===== */
.page-about__pricing {
  margin-top: var(--space-6);
  background: var(--color-navy);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-4);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.page-about__pricing::before {
  content: "";
  position: absolute;
  right: -40px;
  top: -40px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.18), transparent 70%);
  pointer-events: none;
}

.page-about__pricing-head {
  margin-bottom: var(--space-4);
}

.page-about__pricing-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--color-yellow);
  color: var(--color-navy);
  border-radius: 999px;
  padding: 3px 14px;
  margin: 0 0 var(--space-2);
}

.page-about__pricing h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
  margin: 0 0 var(--space-2);
}

.page-about__pricing-head > p:not(.page-about__pricing-tag) {
  color: rgb(255 255 255 / 0.75);
  font-size: var(--text-sm);
  max-width: 640px;
  margin: 0;
}

.page-about__pricing-list {
  list-style: none;
  margin: 0 0 var(--space-4);
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.page-about__pricing-item {
  background: rgb(255 255 255 / 0.07);
  border: 1px solid rgb(255 255 255 / 0.14);
  border-radius: var(--radius);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: border-color var(--transition), transform var(--transition), background var(--transition);
}

.page-about__pricing-item:hover {
  border-color: var(--color-cyan);
  background: rgb(255 255 255 / 0.11);
  transform: translateY(-3px);
}

.page-about__pricing-name {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-cyan);
}

.page-about__pricing-fee {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: var(--text-2xl);
  color: var(--color-yellow);
  line-height: 1.2;
}

.page-about__pricing-desc {
  color: rgb(255 255 255 / 0.7);
  font-size: var(--text-xs);
}

.page-about__pricing-note {
  margin: 0;
  color: rgb(255 255 255 / 0.78);
  font-size: var(--text-sm);
}

.page-about__pricing-note a {
  color: var(--color-yellow);
  font-weight: 700;
}

/* ===== 数字悬停跳动 ===== */
@keyframes page-about-digit-bounce {
  0%, 100% {
    transform: translateY(0) scale(1);
  }
  20% {
    transform: translateY(-8px) scale(1.04);
  }
  40% {
    transform: translateY(2px) scale(0.98);
  }
  60% {
    transform: translateY(-4px) scale(1.02);
  }
  80% {
    transform: translateY(1px) scale(1);
  }
}

@media (hover: hover) {
  .page-about .stat-tile:hover .stat-tile__value {
    animation: page-about-digit-bounce 0.6s ease;
  }
}

/* ===== 04 合规与备案 ===== */
.page-about__compliance {
  background: linear-gradient(165deg, #0B1740 0%, var(--color-navy) 55%, #1B3A7A 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}

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

.page-about__compliance-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.14;
}

.page-about__compliance .exhibit__body {
  position: relative;
  z-index: 1;
}

.page-about__compliance-grid {
  display: grid;
  gap: var(--space-3);
}

.page-about__plaque {
  min-height: 132px;
  background: rgb(255 255 255 / 0.07);
  border: 1px solid rgb(0 229 255 / 0.22);
  border-top: 4px solid var(--color-yellow);
  border-radius: var(--radius);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.page-about__plaque:hover {
  background: rgb(255 255 255 / 0.12);
  border-color: var(--color-yellow);
  transform: translateY(-3px);
}

.page-about__plaque-label {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-cyan);
}

.page-about__plaque-value {
  font-family: var(--font-data);
  font-size: var(--text-lg);
  line-height: 1.4;
  color: #fff;
  word-break: break-word;
}

.page-about__compliance-note {
  margin-top: var(--space-5);
  padding: var(--space-4);
  border-radius: var(--radius);
  background: rgb(255 255 255 / 0.07);
  color: rgb(255 255 255 / 0.88);
  font-size: var(--text-sm);
  line-height: 1.9;
}

.page-about__compliance-note p {
  margin: 0 0 var(--space-2);
}

.page-about__compliance-note p:last-child {
  margin: 0;
}

.page-about__compliance-note a {
  color: var(--color-cyan);
  font-weight: 700;
}

/* ===== 色带 ===== */
.page-about .section-band {
  height: 12px;
  background: linear-gradient(90deg, var(--color-yellow) 0%, var(--color-cyan) 100%);
}

.page-about .section-band--alt {
  background: linear-gradient(90deg, var(--color-purple) 0%, var(--color-cyan) 100%);
}

/* ===== 动效偏好 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ===== 响应式 ===== */
@media (min-width: 768px) {
  .page-about__banner {
    padding: 96px 0 120px;
  }

  .page-about__banner-inner {
    grid-template-columns: 1fr auto;
    align-items: end;
  }

  .page-about__banner-note {
    display: block;
  }

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

  .page-about__values-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
  }

  .page-about__pricing {
    padding: var(--space-5);
  }

  .page-about__pricing-list {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
  }

  .page-about__compliance-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }
}

@media (min-width: 1024px) {
  .page-about__data-grid {
    grid-template-columns: 1.4fr 0.85fr;
    gap: var(--space-5);
  }

  .page-about__compliance-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about__compliance-note {
    padding: var(--space-4) var(--space-5);
  }

  .page-about__timeline-list::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .page-about__timeline-item {
    width: calc(50% - 48px);
    padding-left: 0;
  }

  .page-about__timeline-item:nth-child(odd) {
    margin-right: auto;
    text-align: right;
  }

  .page-about__timeline-item:nth-child(even) {
    margin-left: auto;
    text-align: left;
  }

  .page-about__timeline-marker {
    left: auto;
    right: -60px;
  }

  .page-about__timeline-item:nth-child(even) .page-about__timeline-marker {
    left: -60px;
    right: auto;
  }
}

.page-about {
  --value: 1rem;
}