/* ===== 品牌故事页 · 专属样式 ===== */
.page-about {
  --about-grid-line: rgba(192, 208, 224, .12);
  --about-muted: #8A9BA8;
  --about-surface-mid: #14253A;
  --about-glow-accent: rgba(63, 255, 62, .16);
  --about-glow-terra: rgba(210, 140, 90, .22);
  --about-hero-bg: linear-gradient(150deg, #072032 0%, #0A1E32 52%, #10263B 100%);
  background: var(--color-bg);
  color: var(--color-text);
}

/* 面包屑 */
.page-about .breadcrumb {
  padding: 22px var(--container-pad) 0;
  max-width: var(--container-w);
  margin-inline: auto;
}
.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-body);
  font-size: .875rem;
  letter-spacing: .02em;
  color: var(--color-muted);
}
.page-about .breadcrumb-list li + li::before {
  content: "·";
  margin-right: 8px;
  color: var(--color-muted);
}
.page-about .breadcrumb-link {
  color: var(--color-muted);
  text-decoration: none;
  transition: color .25s var(--ease);
}
.page-about .breadcrumb-link:hover {
  color: var(--color-accent);
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--color-text-soft);
}

/* Hero */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(44px, 7vw, 92px) var(--container-pad) clamp(36px, 5vw, 64px);
  background:
    radial-gradient(1px 1px at 12% 26%, rgba(255, 255, 255, .52), transparent),
    radial-gradient(1.5px 1.5px at 68% 18%, rgba(255, 255, 255, .42), transparent),
    radial-gradient(1px 1px at 88% 62%, rgba(255, 255, 255, .34), transparent),
    radial-gradient(2px 2px at 42% 78%, rgba(63, 255, 62, .22), transparent),
    var(--about-hero-bg);
  border-bottom: 1px solid var(--color-border);
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent) 50%, transparent);
  opacity: .4;
}
.page-about .about-hero-grid {
  max-width: var(--container-w);
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
.page-about .about-hero-sig {
  margin: 0 0 14px;
  font-family: var(--font-body);
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--color-accent);
}
.page-about .page-title {
  margin: 0 0 10px;
  font-family: var(--font-heading);
  font-size: clamp(1.9rem, 5.2vw, 3.4rem);
  line-height: 1.08;
  color: var(--color-text);
}
.page-about .page-lead {
  margin: 0 0 28px;
  font-family: var(--font-body);
  font-size: clamp(1rem, 2.2vw, 1.28rem);
  font-weight: 400;
  color: var(--color-text-soft);
}
.page-about .about-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  max-width: 520px;
  margin-bottom: 22px;
}
.page-about .about-metric {
  padding: 14px 16px;
  background: rgba(28, 44, 62, .72);
  border: 1px solid var(--color-border);
  border-left: 2px solid var(--color-accent);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(4px);
}
.page-about .about-metric-label {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-body);
  font-size: .76rem;
  font-weight: 400;
  letter-spacing: .06em;
  color: var(--color-muted);
}
.page-about .about-metric-value {
  display: block;
  font-family: var(--font-body);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-text);
}
.page-about .about-hero-note {
  margin: 0;
  font-family: var(--font-body);
  font-size: .84rem;
  color: var(--color-muted);
}
.page-about .about-hero-rail {
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
}
.page-about .about-hero-rail-card {
  width: 240px;
  padding: 20px 20px 18px;
  background: linear-gradient(135deg, rgba(63, 255, 62, .08), rgba(255, 107, 53, .06));
  border: 1px solid rgba(63, 255, 62, .32);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md), var(--about-glow-accent);
}
.page-about .about-rail-signal {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--color-accent);
}
.page-about .about-rail-pulse {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  animation: aboutPulse 2s infinite ease-in-out;
}
.page-about .about-rail-title {
  margin: 14px 0 6px;
  font-family: var(--font-heading);
  font-size: 1.12rem;
  color: var(--color-text);
}
.page-about .about-rail-meta {
  margin: 0 0 6px;
  font-family: var(--font-body);
  font-size: .9rem;
  color: var(--color-cta);
}
.page-about .about-rail-foot {
  margin: 0;
  font-family: var(--font-body);
  font-size: .78rem;
  color: var(--color-muted);
}

/* 通用章节间距 */
.page-about .section-block {
  padding: clamp(56px, 9vw, 110px) 0;
}
.page-about .container {
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}
.page-about .section-kicker {
  margin: 0 0 10px;
  font-family: var(--font-body);
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--color-muted);
}
.page-about .section-title {
  margin: 0 0 18px;
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3.6vw, 2.2rem);
  line-height: 1.15;
  color: var(--color-text);
}
.page-about .about-section-lead {
  max-width: 620px;
  margin: 0 0 42px;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-soft);
}

/* 品牌起源 */
.page-about .about-origin {
  background: var(--color-bg);
}
.page-about .about-origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
}
.page-about .about-origin-body p {
  margin: 0 0 18px;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--color-text-soft);
}
.page-about .about-origin-body p:first-child::first-letter {
  float: left;
  margin: .14em .12em 0 0;
  font-family: var(--font-heading);
  font-size: 3.2em;
  line-height: .82;
  color: var(--color-terra);
}
.page-about .about-origin-quote {
  margin: 0 0 20px;
  padding: 4px 0 4px 18px;
  border-left: 3px solid var(--color-moss);
  font-family: var(--font-heading);
  font-size: 1.06rem;
  line-height: 1.5;
  color: var(--color-text);
}
.page-about .about-origin-figure {
  margin: 0;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface-deep);
  box-shadow: var(--shadow-md);
  position: relative;
  display: flex;
  align-items: flex-end;
}
.page-about .about-origin-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .6s var(--ease);
}
.page-about .about-origin-figure:hover img {
  transform: scale(1.03);
}
.page-about .about-figcaption {
  position: absolute;
  left: 12px;
  bottom: 12px;
  margin: 0;
  padding: 6px 12px;
  font-family: var(--font-body);
  font-size: .8rem;
  letter-spacing: .04em;
  color: var(--color-text);
  background: rgba(10, 30, 50, .68);
  border: 1px solid rgba(192, 208, 224, .18);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(4px);
}
.page-about .about-inline-link {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 255, 62, .34);
  transition: color .25s var(--ease), border-color .25s var(--ease);
}
.page-about .about-inline-link:hover {
  color: var(--color-accent-soft);
  border-color: var(--color-accent-soft);
}

/* 发展历程 */
.page-about .about-journey {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.page-about .about-journey-wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}
.page-about .about-timeline {
  position: relative;
  padding-left: 28px;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-accent), var(--color-border) 72%);
  opacity: .7;
}
.page-about .about-timeline-item {
  position: relative;
  margin-bottom: 12px;
}
.page-about .about-timeline summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 14px;
  align-items: baseline;
  padding: 14px 16px 14px 30px;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  background: transparent;
  transition: background .3s var(--ease), border-color .3s var(--ease);
}
.page-about .about-timeline summary::-webkit-details-marker {
  display: none;
}
.page-about .about-timeline summary:hover {
  background: rgba(63, 255, 62, .06);
  border-color: rgba(63, 255, 62, .2);
}
.page-about .about-timeline summary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.page-about .about-timeline summary::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 21px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 2px solid var(--color-accent);
  box-shadow: 0 0 0 4px rgba(63, 255, 62, .1);
  transition: background .3s var(--ease), box-shadow .3s var(--ease);
}
.page-about .about-timeline-item[open] summary::before {
  background: var(--color-accent);
  box-shadow: 0 0 0 6px rgba(63, 255, 62, .16), var(--glow-accent);
}
.page-about .about-tl-year {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .05em;
  color: var(--color-accent);
}
.page-about .about-tl-title {
  font-family: var(--font-heading);
  font-size: .96rem;
  line-height: 1.35;
  color: var(--color-text);
}
.page-about .about-tl-detail {
  margin: -4px 0 14px;
  padding: 10px 16px 14px 100px;
  max-width: 560px;
  font-family: var(--font-body);
  font-size: .92rem;
  line-height: 1.75;
  color: var(--color-text-soft);
  border-bottom: 1px dashed var(--color-border);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}
.page-about .about-journey-figure {
  margin: 0;
  display: block;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  background: var(--color-surface-deep);
  box-shadow: var(--shadow-sm);
  position: relative;
}
.page-about .about-journey-figure img {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* 资质与荣誉 */
.page-about .about-credentials {
  background: var(--about-hero-bg);
  position: relative;
}
.page-about .about-credentials::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(1px 1px at 72% 12%, rgba(255, 255, 255, .22), transparent),
    radial-gradient(1px 1px at 18% 88%, rgba(255, 255, 255, .18), transparent);
}
.page-about .about-credentials .container {
  position: relative;
}
.page-about .about-cred-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.page-about .about-cred-card {
  perspective: 1200px;
}
.page-about .about-cred-inner {
  position: relative;
  min-height: 210px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.page-about .about-cred-face {
  padding: 26px 24px 24px;
}
.page-about .about-cred-face--front {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  min-height: 200px;
  background:
    linear-gradient(135deg, rgba(63, 255, 62, .05), rgba(255, 255, 255, 0) 48%),
    var(--color-surface);
}
.page-about .about-cred-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  margin-bottom: 14px;
  border-radius: 12px;
  color: var(--color-moss);
  background: rgba(122, 132, 80, .14);
  border: 1px solid rgba(122, 132, 80, .22);
}
.page-about .about-cred-card:nth-child(2) .about-cred-icon {
  color: var(--color-terra);
  background: rgba(210, 140, 90, .14);
  border-color: rgba(210, 140, 90, .24);
}
.page-about .about-cred-card:nth-child(3) .about-cred-icon {
  color: var(--color-accent);
  background: rgba(63, 255, 62, .1);
  border-color: rgba(63, 255, 62, .24);
}
.page-about .about-cred-card:nth-child(4) .about-cred-icon {
  color: var(--color-text-soft);
  background: rgba(192, 208, 224, .1);
  border-color: rgba(192, 208, 224, .2);
}
.page-about .about-cred-face h3 {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-size: 1.2rem;
  color: var(--color-text);
}
.page-about .about-cred-face p {
  margin: 0;
  font-family: var(--font-body);
  font-size: .92rem;
  line-height: 1.6;
  color: var(--color-muted);
}
.page-about .about-cred-face--back {
  min-height: 200px;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, rgba(255, 107, 53, .08), rgba(63, 255, 62, .06));
  border-top: 2px solid var(--color-border);
}
.page-about .about-cred-face--back p {
  color: var(--color-text-soft);
  line-height: 1.7;
}
.page-about .about-cred-note {
  margin: 28px 0 0;
  font-family: var(--font-body);
  font-size: .9rem;
  color: var(--color-muted);
}

/* 团队与文化 */
.page-about .about-team {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}
.page-about .about-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
}
.page-about .about-team-body p {
  margin: 0 0 16px;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--color-text-soft);
}
.page-about .about-team-principles {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}
.page-about .about-team-principles li {
  position: relative;
  padding: 12px 16px 12px 20px;
  font-family: var(--font-body);
  font-size: .94rem;
  line-height: 1.55;
  color: var(--color-text-soft);
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-moss);
}
.page-about .about-team-principles li:nth-child(2),
.page-about .about-team-principles li:nth-child(3) {
  border-left-color: var(--color-terra);
}
.page-about .about-team-principles li strong {
  font-family: var(--font-heading);
  font-size: .88rem;
  color: var(--color-text);
}
.page-about .about-team-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-surface-deep);
  box-shadow: var(--shadow-md);
  position: relative;
}
.page-about .about-team-figure img {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* 串联导航 */
.page-about .about-bridge {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}
.page-about .about-bridge-inner {
  text-align: center;
}
.page-about .about-bridge .section-title {
  margin-bottom: 10px;
}
.page-about .about-bridge-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin: 26px 0 24px;
}
.page-about .about-bridge-links .btn {
  min-width: 150px;
  justify-content: center;
}
.page-about .about-bridge-note {
  margin: 0;
  font-family: var(--font-body);
  font-size: .9rem;
  letter-spacing: .04em;
  color: var(--color-muted);
}

@keyframes aboutPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(63, 255, 62, .55); }
  50% { box-shadow: 0 0 0 8px rgba(63, 255, 62, 0); }
}

/* 平板及以上 */
@media (min-width: 640px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 768px) {
  .page-about .about-hero-grid {
    grid-template-columns: 1fr auto;
    gap: 24px;
  }
  .page-about .about-hero-main {
    max-width: 760px;
  }
  .page-about .about-origin-grid {
    grid-template-columns: 1.05fr .95fr;
    gap: 48px;
  }
  .page-about .about-journey-wrap {
    grid-template-columns: minmax(0, 1fr) 348px;
    gap: 48px;
    align-items: start;
  }
  .page-about .about-cred-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .page-about .about-team-grid {
    grid-template-columns: 1.1fr .9fr;
    gap: 52px;
  }
  .page-about .about-team-principles {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .about-tl-detail {
    padding-inline: 100px 20px;
  }

  /* 资质卡片：桌面交互翻转 */
  @media (hover: hover) {
    .page-about .about-cred-inner {
      min-height: 264px;
    }
    .page-about .about-cred-face {
      position: absolute;
      inset: 0;
      min-height: 0;
      backface-visibility: hidden;
      transition: transform .6s var(--ease);
    }
    .page-about .about-cred-face--front {
      transform: rotateY(0deg);
    }
    .page-about .about-cred-face--back {
      transform: rotateY(180deg);
      border-top: none;
    }
    .page-about .about-cred-card:hover .about-cred-inner,
    .page-about .about-cred-card:focus-within .about-cred-inner {
      transform: rotateY(180deg);
    }
    .page-about .about-cred-inner {
      transition: transform .6s var(--ease);
      transform-style: preserve-3d;
    }
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding-top: clamp(60px, 8vw, 104px);
  }
  .page-about .about-hero-metrics {
    margin-bottom: 30px;
  }
  .page-about .about-cred-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-team-principles {
    grid-template-columns: 1fr;
  }
  .page-about .about-bridge-links .btn {
    min-width: 180px;
  }
}