/* ===== 品牌概况 · page-about 专属样式 ===== */

.page-about {
  --about-surface: var(--white);
  --about-border: rgba(192, 192, 192, 0.35);
  --about-deep: var(--primary-dark);
  --about-copy-max: 66ch;
  overflow-x: hidden;
  background: var(--white);
  color: var(--primary);
  font-family: var(--font-body);
  line-height: 1.7;
}

.page-about__wrap {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: calc(var(--header-h) + 24px) 20px 0;
}

.page-about__crumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--neutral-gray);
  margin-bottom: 18px;
}

.page-about__crumb-link {
  color: var(--neutral-gray);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms ease, border-color 180ms ease;
}

.page-about__crumb-link:hover,
.page-about__crumb-link:focus-visible {
  color: var(--accent-deep);
  border-color: var(--accent-deep);
}

.page-about__crumb-sep {
  color: var(--silver);
}

.page-about__section-index {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.24em;
  color: var(--accent-deep);
  text-transform: uppercase;
}

.page-about__section-index--light {
  color: var(--accent);
}

/* ===== 01 / 品牌定位述 ===== */

.page-about__hero {
  position: relative;
  margin-bottom: 0;
  padding: 28px 0 56px;
}

.page-about__hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--primary) 34%, var(--silver) 100%);
  opacity: 0.7;
}

.page-about__hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

.page-about__hero-content {
  order: 2;
}

.page-about__hero-title {
  font-family: var(--font-head);
  font-size: clamp(34px, 7vw, 64px);
  line-height: 1.05;
  letter-spacing: 0.02em;
  margin: 0 0 18px;
  color: var(--primary);
  text-transform: uppercase;
}

.page-about__hero-sub {
  display: block;
  font-family: var(--font-body);
  font-size: clamp(14px, 2.4vw, 20px);
  letter-spacing: 0.42em;
  font-weight: 500;
  color: var(--accent-deep);
  margin-top: 12px;
  text-transform: none;
}

.page-about__hero-lead {
  font-size: 16px;
  color: var(--primary);
  max-width: var(--about-copy-max);
  margin: 0 0 14px;
}

.page-about__hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin: 20px 0 24px;
}

.page-about__hero-meta-item {
  display: inline-block;
  padding: 6px 12px;
  background: var(--primary);
  color: var(--accent);
  font-size: 14px;
  letter-spacing: 0.04em;
  border-radius: var(--radius);
}

.page-about__hero-anchor {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  border-bottom: 2px solid var(--accent-deep);
  padding-bottom: 4px;
  transition: background 180ms ease, padding 180ms ease;
}

.page-about__hero-anchor:hover,
.page-about__hero-anchor:focus-visible {
  background: rgba(46, 204, 64, 0.1);
  padding-left: 4px;
  padding-right: 4px;
}

.page-about__hero-image {
  order: 1;
  position: relative;
}

.page-about__hero-image::before {
  content: "";
  position: absolute;
  inset: -12px -12px 12px 12px;
  background: repeating-linear-gradient(-45deg, transparent 0 12px, rgba(46, 204, 64, 0.08) 12px 24px);
  clip-path: var(--clip-diagonal);
  z-index: 0;
}

.page-about__hero-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius);
  position: relative;
  z-index: 1;
  filter: saturate(0.9);
}

/* ===== 02 / 核心数据能力 ===== */

.page-about__section--dark {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 60%, var(--primary-dark) 100%);
  color: var(--white);
  padding: 48px 24px 56px;
  margin-left: -20px;
  margin-right: -20px;
  position: relative;
}

.page-about__section--dark::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 120px;
  height: 6px;
  background: var(--accent);
}

.page-about__section--dark .page-about__section-title {
  color: var(--white);
}

.page-about__section--dark .page-about__capability-copy p {
  color: rgba(255, 255, 255, 0.88);
}

.page-about__capability-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 28px;
}

.page-about__capability-copy {
  max-width: var(--about-copy-max);
}

.page-about__capability-lead {
  font-size: 17px;
  margin: 0 0 18px;
}

.page-about__capability-list {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
  display: grid;
  gap: 14px;
}

.page-about__capability-list li {
  position: relative;
  padding-left: 18px;
  border-left: 3px solid var(--accent);
  font-size: 15px;
}

.page-about__capability-note {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  border-top: 1px solid rgba(192, 192, 192, 0.25);
  padding-top: 14px;
}

.page-about__stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 8px;
}

.page-about__stat {
  background: rgba(5, 18, 38, 0.45);
  border: 1px solid rgba(192, 192, 192, 0.25);
  padding: 20px 16px;
  border-radius: var(--radius);
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.page-about__stat:hover,
.page-about__stat:focus-within {
  transform: translateY(-4px);
  border-color: var(--accent);
  background: rgba(5, 18, 38, 0.7);
}

.page-about__stat--accent {
  border-left: 4px solid var(--accent);
}

.page-about__stat-num {
  display: block;
  font-size: clamp(28px, 6vw, 40px);
  line-height: 1;
  color: var(--accent);
  margin-bottom: 10px;
}

.page-about__stat-label {
  display: block;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--silver);
}

.page-about__capability-image {
  position: relative;
}

.page-about__capability-image::after {
  content: "";
  position: absolute;
  inset: 10px -10px -10px 10px;
  border: 1px solid rgba(57, 255, 20, 0.45);
  clip-path: var(--clip-diagonal);
  pointer-events: none;
}

.page-about__capability-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius);
  position: relative;
  z-index: 1;
}

/* ===== 03 / 发展历程 ===== */

.page-about__timeline-section {
  padding-top: 56px;
  padding-bottom: 56px;
}

.page-about__timeline-banner {
  margin-bottom: 40px;
  position: relative;
}

.page-about__timeline-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(10, 31, 68, 0.15), rgba(57, 255, 20, 0.06));
  border-radius: var(--radius);
}

.page-about__timeline-banner-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius);
}

.page-about__section-desc {
  color: var(--neutral-gray);
  font-size: 15px;
  margin: 0;
}

.page-about__timeline {
  position: relative;
  display: grid;
  gap: 28px;
  margin-top: 40px;
  padding-left: 18px;
  border-left: 3px solid var(--accent-deep);
}

.page-about__timeline-item {
  position: relative;
}

.page-about__timeline-item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--white);
  border: 3px solid var(--accent-deep);
  border-radius: 50%;
}

.page-about__timeline-item--current::before {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 0 5px rgba(57, 255, 20, 0.2);
}

.page-about__timeline-node {
  display: grid;
  gap: 8px;
}

.page-about__timeline-season {
  display: inline-block;
  padding: 4px 10px;
  background: var(--primary);
  color: var(--accent);
  font-size: 14px;
  letter-spacing: 0.06em;
  border-radius: var(--radius);
}

.page-about__timeline-card {
  background: var(--neutral-light);
  padding: 18px 18px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--about-border);
  transition: background 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.page-about__timeline-node:hover .page-about__timeline-card {
  background: var(--white);
  border-color: var(--accent-deep);
  transform: translateX(4px);
}

.page-about__timeline-title {
  font-family: var(--font-head);
  font-size: 20px;
  margin: 0 0 8px;
  color: var(--primary);
  letter-spacing: 0.03em;
}

.page-about__timeline-card p {
  margin: 0;
  font-size: 15px;
  color: #334155;
}

/* ===== 04 / 资质与认证 ===== */

.page-about__section--alt {
  background: var(--neutral-light);
  padding: 48px 24px 56px;
  margin-left: -20px;
  margin-right: -20px;
}

.page-about__section--alt .page-about__section-title {
  color: var(--primary);
}

.page-about__creds-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 30px;
}

.page-about__creds-card {
  background: var(--white);
  border: 1px solid var(--about-border);
  padding: 24px 22px;
  border-radius: var(--radius);
  min-height: 100%;
  transition: box-shadow 180ms ease, transform 180ms ease, border-color 180ms ease;
}

.page-about__creds-card:hover,
.page-about__creds-card:focus-visible,
.page-about__creds-card:focus-within {
  box-shadow: 0 14px 28px rgba(10, 31, 68, 0.1);
  transform: translateY(-3px);
  border-color: var(--accent-deep);
}

.page-about__creds-icon {
  display: block;
  margin-bottom: 18px;
}

.page-about__creds-title {
  font-family: var(--font-head);
  font-size: 22px;
  letter-spacing: 0.04em;
  color: var(--primary);
  margin: 0 0 10px;
}

.page-about__creds-text {
  margin: 0;
  font-size: 15px;
  color: #3f4a5c;
  max-width: var(--about-copy-max);
}

/* ===== 05 / 合作伙伴与生态 ===== */

.page-about__eco-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 30px;
}

.page-about__eco-card {
  position: relative;
  background: var(--white);
  border: 1px solid var(--about-border);
  border-top: 4px solid var(--primary);
  padding: 24px 22px;
  border-radius: var(--radius);
  transition: background 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.page-about__eco-card:hover {
  background: var(--neutral-light);
  border-top-color: var(--accent-deep);
  transform: translateY(-3px);
}

.page-about__eco-tag {
  display: inline-block;
  margin-bottom: 12px;
}

.page-about__eco-title {
  font-family: var(--font-head);
  font-size: 21px;
  letter-spacing: 0.03em;
  color: var(--primary);
  margin: 0 0 10px;
}

.page-about__eco-card p {
  margin: 0;
  font-size: 15px;
  color: #3f4a5c;
}

/* ===== 06 / 团队与组织 ===== */

.page-about__section--team {
  background: linear-gradient(180deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: var(--white);
  padding: 48px 24px 64px;
  margin-left: -20px;
  margin-right: -20px;
  position: relative;
}

.page-about__section--team .page-about__section-title {
  color: var(--white);
}

.page-about__team-inner {
  max-width: var(--content-max);
  margin: 0 auto;
}

.page-about__team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  margin-top: 32px;
}

.page-about__team-copy p {
  color: rgba(255, 255, 255, 0.88);
  font-size: 16px;
  margin: 0 0 16px;
  max-width: var(--about-copy-max);
}

.page-about__team-link {
  display: inline-block;
  color: var(--accent);
  border-bottom: 2px solid var(--accent);
  font-weight: 600;
  text-decoration: none;
  padding-bottom: 2px;
  margin-top: 8px;
  font-size: 15px;
}

.page-about__team-link:hover,
.page-about__team-link:focus-visible {
  background: rgba(57, 255, 20, 0.12);
  padding-left: 4px;
  padding-right: 4px;
}

.page-about__org-visual {
  position: relative;
  width: 100%;
  min-height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-about__org-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(57, 255, 20, 0.5);
}

.page-about__org-ring--outer {
  width: 210px;
  height: 210px;
}

.page-about__org-ring--inner {
  width: 140px;
  height: 140px;
  border-color: rgba(192, 192, 192, 0.55);
  transform: rotate(45deg) scale(1.2);
  border-radius: 8px;
}

.page-about__org-core {
  position: relative;
  z-index: 2;
  font-size: 30px;
  color: var(--accent);
  background: var(--primary-dark);
  border: 3px solid var(--accent);
  width: 112px;
  height: 112px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.page-about__org-dot {
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(57, 255, 20, 0.8);
}

.page-about__org-dot--a { top: 14%; left: 22%; }
.page-about__org-dot--b { top: 18%; right: 18%; background: var(--warm-yellow); box-shadow: 0 0 12px rgba(255, 184, 0, 0.7); }
.page-about__org-dot--c { bottom: 14%; left: 36%; }

.page-about__trust-band {
  margin-top: 52px;
  border-top: 2px solid rgba(57, 255, 20, 0.6);
  padding-top: 24px;
  display: grid;
  gap: 20px;
}

.page-about__trust-text {
  margin: 0;
  color: var(--silver);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.02em;
  max-width: var(--about-copy-max);
  position: relative;
  padding-left: 14px;
}

.page-about__trust-text::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  background: var(--accent);
}

.page-about__trust-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
}

.page-about__trust-link {
  color: var(--white);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  border-bottom: 2px solid var(--silver);
  padding-bottom: 2px;
  transition: color 180ms ease, border-color 180ms ease;
}

.page-about__trust-link:hover,
.page-about__trust-link:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
}

/* ===== 桌面端增强 ===== */

@media (min-width: 768px) {
  .page-about__wrap {
    padding-left: 32px;
    padding-right: 32px;
  }

  .page-about__section--dark,
  .page-about__section--alt,
  .page-about__section--team {
    margin-left: -32px;
    margin-right: -32px;
    padding-left: 40px;
    padding-right: 40px;
  }

  .page-about__hero-grid {
    grid-template-columns: 54% 46%;
    gap: 44px;
  }

  .page-about__hero-content {
    order: 1;
  }

  .page-about__hero-image {
    order: 2;
  }

  .page-about__capability-grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: start;
    column-gap: 48px;
  }

  .page-about__stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about__capability-image {
    grid-column: 1 / -1;
    max-width: 640px;
  }

  .page-about__timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px;
    border-left: 0;
    padding-left: 0;
    border-top: 3px solid var(--accent-deep);
    padding-top: 28px;
  }

  .page-about__timeline-item::before {
    left: 0;
    top: -40px;
  }

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

  .page-about__eco-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .page-about__team-grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }

  .page-about__trust-band {
    grid-template-columns: 1fr auto;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-about__hero {
    padding-top: 48px;
    padding-bottom: 72px;
  }

  .page-about__hero-title {
    font-size: 64px;
  }

  .page-about__section {
    padding-top: 64px;
    padding-bottom: 72px;
  }

  .page-about__capability-grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-about__capability-image {
    grid-column: auto;
    max-width: none;
  }

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

  .page-about__stats-grid {
    grid-template-columns: repeat(2, 1fr);
    align-content: start;
  }

  .page-about__section--dark,
  .page-about__section--alt,
  .page-about__section--team {
    margin-left: -48px;
    margin-right: -48px;
    padding-left: 56px;
    padding-right: 56px;
  }

  .page-about__wrap {
    padding-left: 48px;
    padding-right: 48px;
  }
}

@media (min-width: 1280px) {
  .page-about__wrap {
    padding-left: 0;
    padding-right: 0;
  }

  .page-about__section--dark,
  .page-about__section--alt,
  .page-about__section--team {
    margin-left: 0;
    margin-right: 0;
    padding-left: 48px;
    padding-right: 48px;
  }
}

/* 窄屏安全：避免横向溢出 */
.page-about img,
.page-about svg {
  max-width: 100%;
  height: auto;
}

.page-about__team-copy,
.page-about__trust-text,
.page-about__hero-lead,
.page-about__capability-note,
.page-about__timeline-card p,
.page-about__ecoo-card p {
  overflow-wrap: break-word;
}