.page-about {
  --about-radius: 18px;
  --about-line: rgba(169,169,169,0.16);
  background: var(--wk-black);
  color: var(--wk-text);
}

/* ===== 面包屑 ===== */
.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2.25rem;
  font-size: 0.8rem;
  position: relative;
  z-index: 2;
}
.page-about .breadcrumb-link {
  color: var(--wk-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.page-about .breadcrumb-link:hover {
  color: var(--wk-orange);
  border-color: currentColor;
}
.page-about .breadcrumbs .sep {
  color: var(--wk-silver);
}
.page-about .breadcrumb-current {
  color: var(--wk-white);
}

/* ===== 首屏 ===== */
.page-about .about-hero {
  position: relative;
  padding: 64px 0 56px;
  background: radial-gradient(900px 420px at 82% -8%, rgba(255,61,0,0.24), transparent 62%), var(--wk-black);
  overflow: hidden;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -48px;
  right: -160px;
  width: 480px;
  height: 640px;
  background: linear-gradient(90deg, transparent, rgba(169,169,169,0.08));
  transform: rotate(22deg);
  pointer-events: none;
}
.page-about .about-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 2.25rem;
}
.page-about .about-hero-copy .badge {
  margin-bottom: 1.1rem;
  background: rgba(255,61,0,0.14);
  border: 1px solid rgba(255,61,0,0.4);
  color: var(--wk-orange-soft);
}
.page-about .about-hero h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2rem, 5.2vw, 3.4rem);
  line-height: 1.14;
  color: var(--wk-white);
  margin: 0 0 1.25rem;
}
.page-about .about-hero .lead {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--wk-muted);
  max-width: 54ch;
}
.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}
.page-about .about-hero-aside {
  min-height: 240px;
  border-radius: var(--about-radius);
  background: linear-gradient(135deg, rgba(255,61,0,0.1), rgba(10,10,10,0.2)), rgba(169,169,169,0.05);
  border: 1px solid var(--wk-line);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
}
.page-about .about-hero-aside svg {
  width: 100%;
  max-width: 480px;
  height: auto;
}

/* ===== 章节标题 ===== */
.page-about .about-section-head {
  margin-bottom: 2.5rem;
}
.page-about .about-section-head .label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--wk-orange-soft);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.page-about .about-section-head .label::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--wk-orange);
  display: inline-block;
}
.page-about .about-section-head-centered {
  text-align: center;
}
.page-about .about-section-head-centered .label::before,
.page-about .about-section-head-centered .label::after {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--wk-orange);
  display: inline-block;
}
.page-about .about-section-head-centered .label::after {
  margin-left: 0.5rem;
}
.page-about .about-section-head h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.7rem, 3.6vw, 2.7rem);
  line-height: 1.2;
  color: var(--wk-white);
  margin: 0 0 0.75rem;
}
.page-about .about-section-desc {
  max-width: 64ch;
  color: var(--wk-muted);
  line-height: 1.75;
  margin: 0;
}
.page-about .about-section-head-centered .about-section-desc {
  margin-left: auto;
  margin-right: auto;
}

/* ===== 品牌故事 / 时间线 ===== */
.page-about .about-story {
  position: relative;
  background: var(--wk-ink);
}
.page-about .about-story::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--wk-orange), var(--wk-green), var(--wk-silver));
  opacity: 0.7;
}
.page-about .about-story-hero {
  margin: 0 0 3rem;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid var(--wk-line);
}
.page-about .about-story-hero img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-timeline {
  position: relative;
  display: grid;
  gap: 2rem;
  margin-top: 3rem;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: linear-gradient(180deg, var(--wk-orange), var(--wk-silver) 55%, transparent);
}
.page-about .about-timeline-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 1rem;
  position: relative;
}
.page-about .about-timeline-marker {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid var(--wk-silver);
  box-shadow: 0 0 0 4px rgba(169,169,169,0.14);
  background: var(--wk-black);
  position: relative;
  z-index: 2;
  transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s;
}
.page-about .about-timeline-marker::after {
  content: "";
  position: absolute;
  inset: 13px;
  border-radius: 50%;
  background: var(--wk-orange);
  opacity: 0.85;
  transition: transform 0.25s, opacity 0.25s;
}
.page-about .about-timeline-content {
  background: rgba(169,169,169,0.06);
  border: 1px solid var(--wk-line);
  border-left: 3px solid var(--wk-orange);
  border-radius: 14px;
  padding: 1.15rem 1.25rem;
  transition: border-color 0.25s, transform 0.25s, background 0.25s;
}
.page-about .about-timeline-content .label {
  color: var(--wk-orange-soft);
  display: inline-block;
  margin-bottom: 0.4rem;
}
.page-about .about-timeline-content h3 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.15rem;
  line-height: 1.35;
  color: var(--wk-white);
  margin: 0 0 0.5rem;
}
.page-about .about-timeline-content p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--wk-muted);
}
.page-about .about-timeline-item:hover .about-timeline-marker,
.page-about .about-timeline-item:focus-within .about-timeline-marker {
  border-color: var(--wk-orange);
  box-shadow: 0 0 0 7px rgba(255,61,0,0.18);
}
.page-about .about-timeline-item:hover .about-timeline-marker::after,
.page-about .about-timeline-item:focus-within .about-timeline-marker::after {
  transform: scale(1.35);
  opacity: 1;
}
.page-about .about-timeline-item:hover .about-timeline-content,
.page-about .about-timeline-item:focus-within .about-timeline-content {
  border-color: rgba(255,61,0,0.5);
  background: rgba(255,61,0,0.06);
  transform: translateX(6px);
}
.page-about .about-timeline-content:focus-visible {
  outline: 2px solid var(--wk-orange);
  outline-offset: 4px;
}

/* ===== 核心数据 ===== */
.page-about .about-data {
  background: radial-gradient(760px 340px at 82% 0%, rgba(255,255,255,0.16), transparent 60%), linear-gradient(135deg, #e63600, #b32c00);
  color: var(--wk-white);
}
.page-about .about-data .about-section-head h2 {
  color: var(--wk-white);
}
.page-about .about-data .about-section-desc {
  color: rgba(255,255,255,0.84);
}
.page-about .about-data-grid {
  display: grid;
  gap: 1rem;
  margin-top: 2.25rem;
}
.page-about .about-data-cell {
  padding: clamp(1.4rem, 3vw, 2.25rem);
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: var(--about-radius);
  background: rgba(10,10,10,0.26);
  position: relative;
  overflow: hidden;
  transition: transform 0.3s, background 0.3s, border-color 0.3s;
}
.page-about .about-data-cell::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--wk-orange);
}
.page-about .about-data-cell:hover,
.page-about .about-data-cell:focus-within {
  transform: translateY(-4px);
  background: rgba(10,10,10,0.36);
  border-color: rgba(255,255,255,0.32);
}
.page-about .about-data-num {
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
  margin-bottom: 0.75rem;
}
.page-about .about-data-num .mono {
  font-family: var(--font-mono);
  font-size: clamp(2.3rem, 7vw, 3.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--wk-green);
  text-shadow: 0 0 28px rgba(57,255,20,0.35);
  transition: text-shadow 0.3s;
}
.page-about .about-data-cell:hover .mono,
.page-about .about-data-cell:focus-within .mono {
  text-shadow: 0 0 12px rgba(57,255,20,0.5), 0 0 42px rgba(57,255,20,0.25);
}
.page-about .about-data-unit {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--wk-white);
}
.page-about .about-data-cell .label {
  color: rgba(255,255,255,0.86);
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
}
.page-about .about-data-cell p {
  margin: 0.6rem 0 0;
  font-size: 0.88rem;
  line-height: 1.6;
  color: rgba(255,255,255,0.76);
}

/* ===== 资质与认证 ===== */
.page-about .about-cert {
  background: radial-gradient(700px 320px at 16% 0%, rgba(255,255,255,0.08), transparent 58%), var(--wk-teal);
  color: var(--wk-white);
}
.page-about .about-cert .about-section-desc {
  color: rgba(255,255,255,0.82);
}
.page-about .about-cert-cards {
  display: grid;
  gap: 1rem;
  margin-top: 1.75rem;
}
.page-about .about-cert-card {
  background: rgba(10,10,10,0.28);
  border: 1px solid rgba(255,255,255,0.14);
  border-left: 4px solid var(--wk-orange);
  border-radius: 14px;
  padding: 1.4rem 1.5rem;
  transition: transform 0.25s, border-color 0.25s, background 0.25s;
}
.page-about .about-cert-card:hover {
  transform: translateX(6px);
  border-color: rgba(255,61,0,0.62);
  background: rgba(10,10,10,0.38);
}
.page-about .about-cert-mark {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--wk-white);
  background: rgba(255,61,0,0.2);
  border: 1px solid rgba(255,61,0,0.45);
  padding: 0.28rem 0.6rem;
  border-radius: 6px;
  margin-bottom: 0.75rem;
}
.page-about .about-cert-card h3 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.12rem;
  color: var(--wk-white);
  margin: 0 0 0.4rem;
}
.page-about .about-cert-card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.65;
  color: rgba(255,255,255,0.78);
}
.page-about .about-cert-visual {
  margin: 2.5rem 0 0;
  border-radius: var(--about-radius);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.16);
}
.page-about .about-cert-visual img {
  display: block;
  width: 100%;
  height: auto;
}

/* ===== 团队与组织 ===== */
.page-about .about-team {
  background: radial-gradient(820px 360px at 84% 12%, rgba(255,255,255,0.06), transparent 60%), var(--wk-wine);
  color: var(--wk-white);
}
.page-about .about-team .about-section-desc {
  color: rgba(255,255,255,0.82);
}
.page-about .about-team-visual {
  margin: 0 0 2rem;
  border-radius: var(--about-radius);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.16);
}
.page-about .about-team-visual img {
  display: block;
  width: 100%;
  height: auto;
}
.page-about .about-team-roles {
  display: grid;
  gap: 1.5rem;
  margin-top: 0.5rem;
}
.page-about .about-team-role {
  position: relative;
  padding-left: 1.25rem;
  border-left: 2px solid rgba(255,255,255,0.22);
  transition: border-color 0.25s, transform 0.25s;
}
.page-about .about-team-role:hover {
  border-left-color: var(--wk-orange);
  transform: translateX(4px);
}
.page-about .about-team-role .label {
  display: block;
  color: var(--wk-orange-soft);
  margin-bottom: 0.4rem;
}
.page-about .about-team-role h3 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.15rem;
  color: var(--wk-white);
  margin: 0 0 0.4rem;
}
.page-about .about-team-role p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.65;
  color: rgba(255,255,255,0.78);
}

/* ===== 合作生态 ===== */
.page-about .about-eco {
  background: radial-gradient(760px 340px at 82% 0%, rgba(255,255,255,0.07), transparent 58%), var(--wk-indigo);
  color: var(--wk-white);
}
.page-about .about-eco .about-section-desc {
  color: rgba(255,255,255,0.82);
}
.page-about .about-eco-grid {
  display: grid;
  gap: 1rem;
  margin-top: 2.25rem;
}
.page-about .about-eco-card {
  background: rgba(10,10,10,0.26);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: var(--about-radius);
  padding: 1.5rem;
  transition: transform 0.3s, border-color 0.3s, background 0.3s;
}
.page-about .about-eco-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255,61,0,0.55);
  background: rgba(10,10,10,0.38);
}
.page-about .about-eco-icon {
  display: inline-block;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(255,61,0,0.85), rgba(169,169,169,0.4));
  position: relative;
  margin-bottom: 1.25rem;
}
.page-about .about-eco-icon::before,
.page-about .about-eco-icon::after {
  content: "";
  position: absolute;
  background: var(--wk-white);
}
.page-about .about-eco-icon::before {
  width: 22px;
  height: 2px;
  left: 12px;
  top: 22px;
  box-shadow: 0 -6px 0 var(--wk-white), 0 6px 0 var(--wk-white);
}
.page-about .about-eco-icon::after {
  width: 2px;
  height: 22px;
  left: 22px;
  top: 12px;
  box-shadow: -6px 0 0 var(--wk-white), 6px 0 0 var(--wk-white);
}
.page-about .about-eco-card h3 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.18rem;
  color: var(--wk-white);
  margin: 0 0 0.5rem;
}
.page-about .about-eco-card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.65;
  color: rgba(255,255,255,0.78);
}

/* ===== CTA ===== */
.page-about .about-cta {
  background: linear-gradient(120deg, rgba(255,61,0,0.96), rgba(185,44,0,0.96));
  color: var(--wk-white);
}
.page-about .about-cta-card {
  text-align: center;
  padding: 1.5rem 0;
}
.page-about .about-cta .label {
  color: rgba(255,255,255,0.85);
}
.page-about .about-cta h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.2;
  color: var(--wk-white);
  margin: 0.75rem 0 1rem;
}
.page-about .about-cta p {
  max-width: 56ch;
  margin: 0 auto 1.5rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.92);
}
.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}
.page-about .about-cta .btn-green {
  box-shadow: 0 0 24px rgba(57,255,20,0.35);
}

/* ===== 平板增强 ===== */
@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 80px 0 68px;
  }
  .page-about .about-data-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .about-data-cell:nth-child(even) {
    transform: translateY(10px);
  }
  .page-about .about-timeline-item {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 1.5rem;
  }
  .page-about .about-timeline::before {
    left: 27px;
  }
  .page-about .about-timeline-marker {
    width: 56px;
    height: 56px;
  }
  .page-about .about-timeline-marker::after {
    inset: 17px;
  }
  .page-about .about-timeline-content {
    max-width: 720px;
    padding: 1.4rem 1.6rem;
  }
  .page-about .about-team-roles {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
  .page-about .about-eco-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
  }
}

/* ===== 桌面增强 ===== */
@media (min-width: 1024px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 4fr);
    align-items: center;
    gap: 3rem;
  }
  .page-about .about-hero-aside {
    min-height: 340px;
  }
  .page-about .about-story {
    padding-top: 96px;
    padding-bottom: 96px;
  }
  .page-about .about-timeline {
    gap: 2.25rem;
  }
  .page-about .about-timeline-content {
    transform: rotate(-0.4deg);
  }
  .page-about .about-timeline-item:hover .about-timeline-content,
  .page-about .about-timeline-item:focus-within .about-timeline-content {
    transform: rotate(0deg) translateX(8px);
  }
  .page-about .about-data-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
  }
  .page-about .about-data-cell:nth-child(even) {
    transform: translateY(-14px);
  }
  .page-about .about-data-cell:nth-child(even):hover,
  .page-about .about-data-cell:nth-child(even):focus-within {
    transform: translateY(-18px);
  }
  .page-about .about-cert-grid {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 4fr);
    gap: 3rem;
    align-items: center;
  }
  .page-about .about-cert-visual {
    margin: 0;
  }
  .page-about .about-team-grid {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 3rem;
    align-items: start;
  }
  .page-about .about-team-visual {
    margin: 0;
    position: sticky;
    top: 96px;
  }
  .page-about .about-team-roles {
    gap: 1.5rem;
  }
  .page-about .about-eco-grid {
    gap: 1.5rem;
  }
  .page-about .about-eco-card:nth-child(2) {
    transform: translateY(12px);
  }
  .page-about .about-eco-card:nth-child(2):hover {
    transform: translateY(7px);
  }
  .page-about .about-cta {
    padding: 96px 0;
  }
}

.page-about {
  --wk-line: var(--wk-ink);
}