/* ============ 品牌介绍页专属样式 ============ */
.page-about {
  position: relative;
  background: var(--bg-primary);
  color: var(--text-main);
  overflow-x: hidden;
}

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

.page-about a:focus-visible,
.page-about .btn:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-about__hero {
  position: relative;
  padding: calc(var(--header-h) + 48px) 0 72px;
  background:
    linear-gradient(130deg, rgba(13, 31, 28, 0.98) 0%, rgba(10, 17, 16, 0.96) 52%, rgba(142, 44, 36, 0.22) 100%),
    var(--bg-primary);
  overflow: hidden;
}

.page-about__hero::before {
  content: "";
  position: absolute;
  width: 300px;
  height: 300px;
  right: -100px;
  top: -140px;
  background: radial-gradient(circle, var(--gold-faint), transparent 70%);
  pointer-events: none;
}

.page-about__hero::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -160px;
  width: 55%;
  height: 300px;
  background: rgba(212, 168, 83, 0.07);
  transform: skewX(-18deg);
  pointer-events: none;
}

.page-about__hero-inner {
  position: relative;
  z-index: 1;
}

.page-about__hero-grid {
  display: grid;
  gap: 40px;
  margin-top: 48px;
}

.page-about__hero-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
}

.page-about__hero h1 {
  margin: 0;
  max-width: 8em;
  text-transform: none;
  letter-spacing: 1px;
  line-height: 1.05;
}

.page-about__hero-desc {
  margin: 0;
  max-width: 34em;
  font-family: var(--font-body);
  color: var(--text-main);
  font-size: 1.0625rem;
  line-height: 1.9;
}

.page-about__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

.page-about__hero-factlist {
  display: flex;
  flex-wrap: wrap;
  gap: 22px 34px;
  margin: 18px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--border-hair);
}

.page-about__hero-fact-item {
  display: flex;
  gap: 10px;
  align-items: baseline;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 1px;
}

.page-about__hero-fact-item dt {
  color: var(--text-muted);
}

.page-about__hero-fact-item dd {
  margin: 0;
  color: var(--gold);
  font-weight: 700;
}

.page-about__hero-media {
  position: relative;
  margin: 0;
  border: 1px solid var(--border-hair);
  background: var(--bg-panel);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.page-about__hero-media::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 56px;
  height: 56px;
  border-top: 2px solid var(--gold);
  border-left: 2px solid var(--gold);
  z-index: 2;
  pointer-events: none;
}

.page-about__hero-media::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--gold), transparent);
}

.page-about__hero-img {
  width: 100%;
  height: auto;
}

/* ---------- 品牌档案与发展历程左右分屏 ---------- */
.page-about__archive-section {
  position: relative;
  padding: 88px 0 0;
}

.page-about__split {
  display: grid;
  gap: 64px;
}

.page-about__timeline-column {
  min-width: 0;
}

.page-about__archive-column {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* 时间轴 */
.page-about__timeline {
  position: relative;
  list-style: none;
  margin: 36px 0 0;
  padding: 0 0 0 24px;
}

.page-about__timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), var(--gold-soft) 55%, rgba(212, 168, 83, 0.05));
}

.page-about__milestone {
  position: relative;
  margin: 0;
  padding: 0 0 36px 24px;
}

.page-about__milestone::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 5px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 4px var(--gold-faint);
  transition: transform 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about__milestone:hover::before,
.page-about__milestone:focus-within::before {
  transform: scale(1.25);
  background: var(--gold);
}

.page-about__milestone--img {
  list-style: none;
  padding-bottom: 24px;
}

.page-about__milestone--img::before {
  display: none;
}

.page-about__milestone-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.page-about__milestone-year {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 2px;
  color: var(--gold);
  font-weight: 700;
}

.page-about__milestone-card {
  border: 1px solid var(--border-hair);
  border-left: 2px solid var(--gold-soft);
  background: linear-gradient(135deg, var(--bg-panel) 0%, rgba(19, 33, 30, 0.8) 100%);
  padding: 18px 20px;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about__milestone-card:hover,
.page-about__milestone:focus-within .page-about__milestone-card {
  transform: translateX(4px);
  border-left-color: var(--gold);
  border-color: var(--gold);
  box-shadow: var(--shadow-card);
}

.page-about__milestone-card .card__title {
  margin: 0 0 6px;
  font-size: 1.125rem;
}

.page-about__milestone-card .card__meta {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-about__milestone-summary {
  max-height: 0;
  margin: 0;
  padding: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 0.85rem;
  color: var(--gold);
  transition: max-height 0.3s var(--ease), opacity 0.3s var(--ease), padding 0.3s var(--ease);
}

.page-about__milestone:hover .page-about__milestone-summary,
.page-about__milestone:focus-within .page-about__milestone-summary {
  max-height: 80px;
  opacity: 1;
  padding-top: 10px;
}

.page-about__timeline-img {
  width: 100%;
  height: auto;
  border: 1px solid var(--border-hair);
  box-shadow: var(--shadow-card);
}

.page-about__milestone-img-caption {
  display: block;
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 2px;
  color: var(--text-muted);
}

/* 档案卡 */
.page-about__archive-card {
  position: relative;
  padding: 26px 26px 10px;
  background: var(--bg-panel);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.page-about__archive-title {
  margin: 0 0 18px;
  font-family: var(--font-title);
  font-size: 1.125rem;
  color: var(--gold);
  letter-spacing: 2px;
}

.page-about__archive-list {
  display: grid;
  grid-template-columns: 1fr;
}

.page-about__archive-card .kv__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid var(--gold-faint);
}

.page-about__archive-card .kv__row:last-child {
  border-bottom: none;
}

.page-about__archive-card .kv__key {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 2px;
  color: var(--text-muted);
}

.page-about__archive-card .kv__value {
  color: var(--text-main);
  font-weight: 600;
  text-align: left;
}

.page-about__archive-note {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 22px 24px;
  border: 1px dashed var(--border-hair);
  background: rgba(13, 31, 28, 0.6);
}

.page-about__archive-num {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  color: var(--gold);
  white-space: nowrap;
}

.page-about__archive-note-text {
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* 斜切分割带 */
.page-about__band {
  height: 3px;
  margin: 16px 0 0;
  background: linear-gradient(90deg, var(--gold-soft), var(--gold), rgba(142, 44, 36, 0.8));
  transform: skewY(-1deg);
  transform-origin: left center;
}

/* ---------- 数据与覆盖 ---------- */
.page-about__data-section {
  position: relative;
  margin-top: 88px;
  padding: 96px 0;
  background:
    linear-gradient(115deg, var(--bg-deep) 0%, var(--bg-primary) 46%, rgba(142, 44, 36, 0.18) 100%);
  overflow: hidden;
}

.page-about__data-head {
  max-width: 720px;
}

.page-about__data-grid {
  display: grid;
  gap: 20px;
  margin-top: 40px;
}

.page-about__data-card {
  position: relative;
  padding: 24px;
  border: 1px solid var(--border-hair);
  background: rgba(19, 33, 30, 0.92);
  overflow: hidden;
}

.page-about__data-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 68px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--gold));
}

.page-about__data-num {
  display: block;
  margin-bottom: 10px;
}

.page-about__data-label {
  font-family: var(--font-title);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.page-about__data-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-about__data-extra {
  display: grid;
  gap: 28px;
  margin-top: 40px;
  padding: 22px;
  background: var(--bg-deep);
  border: 1px solid var(--border-hair);
  box-shadow: var(--shadow-card);
}

.page-about__data-extra img {
  width: 100%;
  height: auto;
}

.page-about__data-extra-copy {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-start;
  justify-content: center;
}

.page-about__data-extra-copy h3 {
  margin: 0;
  font-family: var(--font-title);
  font-size: 1.375rem;
  color: var(--text-main);
}

.page-about__data-extra-copy p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.8;
}

/* ---------- 品牌价值观 ---------- */
.page-about__values-section {
  padding: 96px 0 88px;
}

.page-about__values-head {
  max-width: 720px;
}

.page-about__values-grid {
  display: grid;
  gap: 20px;
  margin-top: 40px;
}

.page-about__value-card {
  position: relative;
  padding: 30px 26px;
  border: 1px solid var(--border-hair);
  background: linear-gradient(145deg, var(--bg-panel), rgba(13, 31, 28, 0.85));
  overflow: hidden;
}

.page-about__value-card::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--gold), transparent);
}

.page-about__value-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 3px;
  color: var(--gold);
  margin-bottom: 18px;
}

.page-about__value-card .card__title {
  margin: 0 0 10px;
}

.page-about__value-card .card__meta {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.page-about__trust {
  position: relative;
  margin-top: 48px;
  padding: 36px 32px;
  background: var(--bg-deep);
  border-left: 3px solid var(--gold);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 24px;
  align-items: flex-start;
}

.page-about__trust-quote {
  margin: 0;
  font-size: 1.0625rem;
  line-height: 2;
  color: var(--text-main);
  max-width: 46em;
}

/* ---------- 中屏：档案键值行对齐 ---------- */
@media (min-width: 640px) {
  .page-about__archive-card .kv__row {
    grid-template-columns: 1fr 1.4fr;
    align-items: baseline;
  }

  .page-about__archive-card .kv__value {
    text-align: right;
  }
}

/* ---------- 桌面端栅格 ---------- */
@media (min-width: 920px) {
  .page-about__hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 56px;
  }

  .page-about__split {
    grid-template-columns: 0.95fr 1.05fr;
    gap: 72px;
    align-items: start;
  }

  .page-about__archive-column {
    margin-top: 120px;
  }

  .page-about__timeline-column {
    padding-top: 8px;
  }

  .page-about__data-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }

  .page-about__data-extra {
    grid-template-columns: 0.8fr 1.2fr;
    align-items: stretch;
    padding: 28px;
  }

  .page-about__data-extra img {
    height: 100%;
    max-height: 320px;
  }

  .page-about__values-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
}

/* ---------- 滚动显现（配合 data-reveal） ---------- */
.js-reveal-ready .page-about__hero-media:not(.is-visible) {
  opacity: 0;
  transform: translateY(24px);
}

.js-reveal-ready .page-about__data-card:not(.is-visible),
.js-reveal-ready .page-about__value-card:not(.is-visible),
.js-reveal-ready .page-about__data-extra:not(.is-visible) {
  opacity: 0;
  transform: translateY(20px);
}

.page-about__hero-media.is-visible,
.page-about__data-card.is-visible,
.page-about__value-card.is-visible,
.page-about__data-extra.is-visible {
  opacity: 1;
  transform: none;
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

@media (prefers-reduced-motion: reduce) {
  .page-about__hero-media,
  .page-about__data-card,
  .page-about__value-card,
  .page-about__data-extra {
    opacity: 1 !important;
    transform: none !important;
  }
}