/* ===== 必博品牌档案页专属样式 ===== */
.page-about {
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 封面首屏 ---------- */
.page-about .about-cover {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.page-about .about-cover::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(rgba(0, 229, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.05) 1px, transparent 1px);
  background-size: 42px 42px;
  -webkit-mask-image: radial-gradient(ellipse at 20% 30%, #000 0%, transparent 65%);
  mask-image: radial-gradient(ellipse at 20% 30%, #000 0%, transparent 65%);
}

.page-about .about-cover__inner {
  display: flex;
  flex-direction: column;
  gap: 36px;
  padding-block: 48px 64px;
}

.page-about .about-cover__main h1 {
  margin: 18px 0 14px;
  font-family: var(--font-head);
  font-size: clamp(2.2rem, 6vw, 4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.page-about .about-cover__lead {
  max-width: 560px;
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--white-72);
}

.page-about .about-cover__aside {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.page-about .about-cover__status {
  display: grid;
  gap: 6px;
  padding: 18px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.page-about .about-cover__status-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--white-72);
}

.page-about .about-cover__status strong {
  font-family: var(--font-head);
  font-size: 1.25rem;
  color: var(--paper);
}

.page-about .about-cover__nav {
  margin-top: 4px;
}

.page-about .about-cover__nav a {
  color: var(--cyan);
  text-decoration: none;
}

/* ---------- 品牌起源 ---------- */
.page-about .about-origin {
  padding-block: 72px 56px;
}

.page-about .about-origin__grid {
  display: grid;
  gap: 36px;
  align-items: center;
}

.page-about .about-origin__text h2 {
  margin: 14px 0 18px;
  font-family: var(--font-head);
  font-size: clamp(1.8rem, 4.2vw, 2.6rem);
  line-height: 1.2;
}

.page-about .about-origin__text p {
  margin-bottom: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

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

.page-about .about-origin__frame {
  border-radius: var(--radius);
}

.page-about .about-origin__note {
  position: absolute;
  right: 8px;
  bottom: 8px;
  padding: 12px 16px;
  backdrop-filter: blur(12px);
}

.page-about .about-origin__note p {
  margin: 4px 0 0;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

/* ---------- 发展里程碑 ---------- */
.page-about .about-milestones {
  position: relative;
  overflow: hidden;
  padding-block: 72px 64px;
}

.page-about .about-milestones::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(600px 220px at 15% 10%, rgba(0, 229, 255, 0.08), transparent 60%),
    radial-gradient(700px 300px at 90% 80%, rgba(255, 107, 53, 0.08), transparent 60%);
  pointer-events: none;
}

.page-about .about-timeline {
  position: relative;
  margin-top: 48px;
}

.page-about .about-timeline__svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-timeline__glow {
  stroke-dasharray: 3 9;
  opacity: 0.5;
}

.page-about .about-timeline__node text {
  fill: var(--paper);
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.08em;
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 22px 20px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: background 0.3s, transform 0.3s, border-color 0.3s;
}

.page-about .about-timeline__item:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(0, 229, 255, 0.3);
}

.page-about .about-timeline__item h3 {
  margin: 10px 0 8px;
  font-family: var(--font-head);
  font-size: 1.1rem;
  color: var(--paper);
}

.page-about .about-timeline__item p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--white-72);
}

.page-about .about-milestones__media {
  margin-top: 28px;
}

.page-about .about-milestones__media img {
  display: block;
  width: 100%;
  max-width: 800px;
  height: auto;
  margin-inline: auto;
  object-fit: cover;
  border-radius: var(--radius);
  opacity: 0.92;
  filter: saturate(0.82);
}

/* ---------- 服务数据 ---------- */
.page-about .about-stats {
  padding-block: 72px 64px;
}

.page-about .about-stats__visual {
  position: relative;
  height: 200px;
  max-width: 100%;
  margin-inline: auto;
  overflow: hidden;
  border-radius: 0 0 var(--radius) var(--radius);
}

.page-about .about-stats__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}

.page-about .about-stats__veil {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 30%, var(--paper) 95%);
}

.page-about .about-stats__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 32px;
}

.page-about .about-stat-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px 18px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(12px);
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}

.page-about .about-stat-card::after {
  content: "";
  position: absolute;
  top: -32px;
  right: -32px;
  width: 84px;
  height: 84px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.2), transparent 70%);
  transition: transform 0.35s ease;
}

.page-about .about-stat-card:hover,
.page-about .about-stat-card:focus-within {
  transform: translateY(-3px);
  box-shadow: var(--shadow-panel);
  border-color: rgba(0, 229, 255, 0.4);
}

.page-about .about-stat-card:hover::after,
.page-about .about-stat-card:focus-within::after {
  transform: scale(1.4);
}

.page-about .about-stat-card__num {
  font-family: var(--font-head);
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--deep-blue);
}

.page-about .about-stat-card__label {
  font-size: 0.95rem;
  font-weight: 600;
}

.page-about .about-stat-card__desc {
  margin: 2px 0 0;
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--ink-soft);
}

.page-about .about-stat-card--feature {
  background: var(--deep-blue);
  border-color: transparent;
}

.page-about .about-stat-card--feature .about-stat-card__num,
.page-about .about-stat-card--feature .about-stat-card__label {
  color: var(--paper);
}

.page-about .about-stat-card--feature .about-stat-card__desc {
  color: var(--white-72);
}

.page-about .about-stat-card--feature::after {
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.4), transparent 70%);
}

/* ---------- 合规与资质 ---------- */
.page-about .about-compliance {
  padding-block: 48px 72px;
}

.page-about .about-compliance__grid {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

.page-about .about-compliance__card {
  position: relative;
  padding: 24px;
  overflow: hidden;
}

.page-about .about-compliance__card h3 {
  margin: 14px 0 10px;
  font-family: var(--font-head);
  font-size: 1.15rem;
}

.page-about .about-compliance__card p {
  margin: 0;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-compliance__icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--deep-blue);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.page-about .about-compliance__card .status-dot {
  position: absolute;
  top: 18px;
  right: 18px;
}

.page-about .about-compliance__note {
  margin-top: 20px;
  padding: 18px 20px;
  border-left: 3px solid var(--orange);
  background: rgba(255, 107, 53, 0.06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  line-height: 1.75;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

/* ---------- 客服使命 ---------- */
.page-about .about-mission {
  padding-block: 16px 72px;
}

.page-about .about-mission__wall {
  position: relative;
  background: var(--deep-blue);
  border-radius: var(--radius);
  padding: 56px 24px 48px;
  overflow: hidden;
  color: var(--paper);
}

.page-about .about-mission__wall::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(600px 240px at 15% 0%, rgba(0, 229, 255, 0.16), transparent 65%),
    radial-gradient(700px 280px at 85% 100%, rgba(255, 107, 53, 0.18), transparent 65%);
  pointer-events: none;
}

.page-about .about-mission__content {
  position: relative;
  max-width: 640px;
}

.page-about .about-mission__content h2 {
  margin: 14px 0 18px;
  font-family: var(--font-head);
  font-size: clamp(1.9rem, 4vw, 2.7rem);
  line-height: 1.2;
}

.page-about .about-mission__content p {
  margin: 0;
  line-height: 1.85;
  color: var(--white-72);
}

.page-about .about-mission__facts {
  position: relative;
  display: grid;
  gap: 14px;
  margin-top: 36px;
}

.page-about .about-mission__fact {
  padding: 18px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.page-about .about-mission__fact-key {
  display: block;
  margin-bottom: 6px;
}

.page-about .about-mission__fact strong {
  display: block;
  font-family: var(--font-head);
  font-size: 1.5rem;
  line-height: 1.2;
}

.page-about .about-mission__fact span:last-child {
  display: block;
  margin-top: 4px;
  color: var(--white-72);
  font-size: 0.92rem;
}

.page-about .about-mission__action {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

/* ---------- 桌面端增强 ---------- */
@media (min-width: 768px) {
  .page-about .about-cover__inner {
    padding-block: 64px 88px;
  }

  .page-about .about-cover__grid {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 44px;
    align-items: end;
  }

  .page-about .about-timeline__list {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

  .page-about .about-timeline__item:first-child {
    grid-column: 1 / -1;
  }

  .page-about .about-timeline__item:nth-child(even) {
    margin-top: 20px;
  }

  .page-about .about-stats__visual {
    height: 240px;
  }

  .page-about .about-stats__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }

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

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

  .page-about .about-mission__wall {
    padding: 64px 44px 56px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-origin__grid {
    grid-template-columns: 1fr 1fr;
    gap: 72px;
  }

  .page-about .about-mission__wall {
    padding: 72px 64px 64px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stat-card,
  .page-about .about-stat-card::after,
  .page-about .about-timeline__item {
    transition: none;
  }
}