/* ===== 品牌档案页专属样式（作用域 .page-about） ===== */
.page-about {
  overflow-x: hidden;
  background: var(--bg-primary);
}

/* ---------- 英雄区 ---------- */
.about-hero {
  position: relative;
  padding: 3rem 0 5rem;
  background: linear-gradient(160deg, var(--bg-primary) 0 58%, rgba(57, 255, 20, 0.07) 58%, rgba(57, 255, 20, 0.14) 100%);
}

.about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 46%;
  height: 100%;
  background: repeating-linear-gradient(-45deg, transparent 0 12px, rgba(57, 255, 20, 0.06) 12px 14px);
  clip-path: polygon(100% 0, 100% 100%, 42% 100%, 66% 0);
  pointer-events: none;
}

.about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, var(--accent-green) 0 32%, var(--accent-orange) 32% 100%);
  opacity: 0.9;
}

.about-hero .breadcrumbs {
  margin-bottom: 2.5rem;
}

.about-hero__kicker {
  position: relative;
  font-family: var(--font-data);
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-green);
  margin: 0 0 0.75rem;
}

.about-hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.6rem, 8vw, 5rem);
  line-height: 1.05;
  letter-spacing: 0.01em;
  color: var(--text-white);
  margin: 0 0 1rem;
  text-transform: uppercase;
}

.about-hero__lead {
  max-width: 760px;
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--text-light);
  margin: 0 0 1.75rem;
}

.about-hero__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 0.75rem;
  margin-bottom: 2.25rem;
}

.about-hero__cta {
  position: relative;
  z-index: 1;
}

/* ---------- 品牌故事 ---------- */
.about-story {
  padding: var(--space-section) 0;
  background: var(--bg-primary);
}

.about-story__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

.about-story__content {
  position: relative;
}

.about-story__par {
  font-size: 1rem;
  line-height: 1.95;
  color: var(--text-light);
  margin-top: 1.25rem;
  max-width: 42rem;
}

.about-story__quote {
  margin-top: 1.5rem;
  padding: 1rem 1.25rem;
  border-left: 4px solid var(--accent-green);
  background: var(--bg-card);
  font-family: var(--font-heading);
  font-size: 1.15rem;
  color: var(--text-white);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 100%, 14px 100%);
}

.about-story__link {
  display: inline-block;
  margin-top: 1.5rem;
  font-family: var(--font-data);
  font-size: 0.9rem;
  color: var(--accent-green);
  text-decoration: none;
  padding: 0.35rem 0;
  border-bottom: 2px solid rgba(57, 255, 20, 0.5);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.about-story__link:hover,
.about-story__link:focus {
  color: var(--text-white);
  border-bottom-color: var(--accent-green);
}

.about-story__media {
  position: relative;
}

.about-story__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid rgba(136, 146, 176, 0.25);
  box-shadow: 18px 18px 0 -6px var(--bg-card), 18px 18px 0 -5px var(--accent-green);
}

/* ---------- 核心数据 ---------- */
.about-stats {
  padding: var(--space-section) 0;
  background: linear-gradient(180deg, var(--bg-primary) 0%, #0d1f3a 100%);
}

.about-stats__intro,
.about-timeline__intro,
.about-partners__intro,
.about-values__intro {
  max-width: 46rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
  margin-top: 0.75rem;
}

.about-stats__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 2.5rem;
}

.about-stat {
  position: relative;
  background: var(--bg-card);
  padding: 1.5rem 1rem 1.25rem;
  border-top: 3px solid var(--accent-green);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.about-stat::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-top: 18px solid var(--accent-green);
  border-left: 18px solid transparent;
}

.about-stat:hover,
.about-stat:focus-within {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.3);
}

.about-stat__value {
  font-family: var(--font-data);
  font-size: clamp(2rem, 6vw, 3rem);
  line-height: 1.1;
  color: var(--text-white);
  margin: 0;
}

.about-stat__unit {
  font-size: 0.55em;
  color: var(--accent-green);
  margin-left: 0.25em;
}

.about-stat__label {
  margin: 0.6rem 0 0;
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--text-muted);
}

/* ---------- 资质认证 ---------- */
.about-cert {
  position: relative;
  padding: var(--space-section) 0;
  background: var(--bg-primary);
}

.about-cert__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
  margin-top: 2.5rem;
}

.about-cert__visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  border: 1px solid rgba(57, 255, 20, 0.35);
}

.about-cert__cards {
  display: grid;
  gap: 1rem;
}

.about-cert__card {
  position: relative;
  background: var(--bg-card);
  padding: 1.5rem 1.25rem 1.5rem 3.5rem;
  border-left: 3px solid var(--accent-orange);
}

.about-cert__card:nth-child(2) {
  border-left-color: var(--accent-green);
}

.about-cert__card-num {
  position: absolute;
  left: 1rem;
  top: 1.4rem;
  font-family: var(--font-data);
  font-size: 1.1rem;
  color: var(--accent-orange);
}

.about-cert__card:nth-child(2) .about-cert__card-num {
  color: var(--accent-green);
}

.about-cert__card h3 {
  font-family: var(--font-heading);
  font-size: 1.08rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-white);
  margin: 0 0 0.25rem;
}

.about-cert__card-type {
  font-family: var(--font-data);
  font-size: 0.8rem;
  color: var(--accent-orange);
  margin: 0 0 0.6rem;
}

.about-cert__card:nth-child(2) .about-cert__card-type {
  color: var(--accent-green);
}

.about-cert__desc {
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--text-muted);
  margin: 0;
}

/* ---------- 发展里程碑 ---------- */
.about-timeline {
  padding: var(--space-section) 0;
  background: linear-gradient(180deg, var(--bg-primary) 0%, #0d1f3a 100%);
}

.about-timeline__wrapper {
  position: relative;
  margin-top: 3rem;
}

.about-timeline__wrapper::before {
  content: "";
  position: absolute;
  top: 0;
  left: 15px;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, var(--accent-green) 0 8%, rgba(57, 255, 20, 0.32) 8% 92%, var(--accent-green) 92% 100%);
}

.about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.about-tl-item {
  position: relative;
  padding: 0 0 2.5rem 3.2rem;
}

.about-tl-item::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 10px;
  width: 14px;
  height: 14px;
  background: var(--accent-green);
  transform: rotate(45deg);
  clip-path: polygon(20% 0, 100% 0, 100% 80%, 80% 100%, 0 100%, 0 20%);
}

.about-tl-item__year {
  font-family: var(--font-data);
  font-size: 0.95rem;
  letter-spacing: 0.1em;
  color: var(--accent-green);
  margin-bottom: 0.4rem;
}

.about-tl-item__panel {
  background: var(--bg-card);
  padding: 1.25rem 1.25rem 1.4rem;
  border-top: 2px solid rgba(136, 146, 176, 0.2);
  border-radius: 0;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: border-color 0.2s ease;
}

.about-tl-item__panel:hover {
  border-top-color: var(--accent-green);
}

.about-tl-item__panel h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  text-transform: uppercase;
  color: var(--text-white);
  margin: 0 0 0.5rem;
}

.about-tl-item__panel p {
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--text-light);
  margin: 0;
}

.about-timeline__img-item {
  list-style: none;
  padding: 0.5rem 0 2.5rem 3.2rem;
}

.about-timeline__img-item img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid rgba(136, 146, 176, 0.25);
  box-shadow: 12px 12px 0 -4px var(--bg-card), 12px 12px 0 -3px var(--accent-orange);
}

/* ---------- 合作生态 ---------- */
.about-partners {
  padding: var(--space-section) 0;
  background: var(--bg-primary);
}

.about-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.about-partner {
  position: relative;
  background: var(--bg-card);
  padding: 2rem 1.5rem;
  border-left: 4px solid var(--accent-green);
  transition: transform 0.25s ease;
}

.about-partner:hover {
  transform: translateX(6px);
}

.about-partner__logo {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 1.4rem;
  color: var(--accent-green);
  background: rgba(57, 255, 20, 0.08);
  border: 1px solid rgba(57, 255, 20, 0.4);
  padding: 0.4rem 0.9rem;
  margin-bottom: 1.25rem;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
}

.about-partner h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  text-transform: uppercase;
  color: var(--text-white);
  margin: 0 0 0.75rem;
}

.about-partner p {
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--text-light);
  margin: 0;
}

.about-partners__note {
  margin-top: 2rem;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--text-muted);
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--accent-orange);
  background: rgba(17, 34, 64, 0.55);
}

/* ---------- 价值观 ---------- */
.about-values {
  padding: var(--space-section) 0;
  background: linear-gradient(180deg, var(--bg-primary) 0%, #0d1f3a 100%);
}

.about-values__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.about-value {
  position: relative;
  padding: 2rem 1.5rem;
  color: var(--text-light);
  overflow: hidden;
}

.about-value h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  text-transform: uppercase;
  color: var(--text-white);
  margin: 0 0 1.25rem;
}

.about-value ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.about-value li {
  position: relative;
  padding-left: 1.4rem;
  font-size: 0.94rem;
  line-height: 1.8;
}

.about-value li::before {
  content: "▸";
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-data);
}

.about-value--green {
  background: var(--bg-card);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
  border-top: 4px solid var(--accent-green);
}

.about-value--green li::before {
  color: var(--accent-green);
}

.about-value--orange {
  background: var(--bg-card);
  clip-path: polygon(20px 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%, 0 20px);
  border-top: 4px solid var(--accent-orange);
}

.about-value--orange li::before {
  color: var(--accent-orange);
}

/* ---------- CTA ---------- */
.about-cta {
  position: relative;
  padding: var(--space-section) 0;
  background: var(--bg-primary);
  text-align: center;
}

.about-cta::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 8px;
  background: linear-gradient(90deg, var(--accent-orange) 0 22%, rgba(57, 255, 20, 0.3) 22% 100%);
}

.about-cta h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  text-transform: uppercase;
  color: var(--text-white);
  margin: 0 0 0.75rem;
}

.about-cta p {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 36rem;
  margin: 0 auto 2rem;
}

.about-cta__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.85rem;
}

/* ---------- 媒体查询：平板及以上 ---------- */
@media (min-width: 768px) {
  .about-hero {
    padding: 4rem 0 6rem;
  }

  .about-story__grid {
    grid-template-columns: 1fr 0.92fr;
    gap: 3rem;
  }

  .about-stats__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
  }

  .about-cert__grid {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }

  .about-partners__grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .about-values__grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .about-value {
    padding: 2.25rem 1.75rem;
  }
}

/* ---------- 媒体查询：桌面 ---------- */
@media (min-width: 1024px) {
  .about-hero__lead {
    font-size: 1.15rem;
  }

  .about-story__par {
    font-size: 1.05rem;
  }

  /* 时间线：中央轴线，左右交替 */
  .about-timeline__wrapper::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .about-tl-item {
    width: 50%;
    padding: 0 3.5rem 3.5rem 0;
  }

  .about-tl-item::before {
    left: auto;
    right: -7px;
  }

  .about-tl-item:nth-child(even) {
    margin-left: 50%;
    padding: 0 0 3.5rem 3.5rem;
  }

  .about-tl-item:nth-child(even)::before {
    left: -7px;
    right: auto;
  }

  .about-tl-item__year {
    margin-bottom: 0.6rem;
  }

  .about-timeline__img-item {
    width: 100%;
    padding: 0 0 3.5rem;
    text-align: center;
  }

  .about-timeline__img-item img {
    max-width: 620px;
    margin: 0 auto;
  }

  .about-cert__card {
    padding: 1.75rem 1.5rem 1.75rem 4rem;
  }

  .about-cert__card-num {
    left: 1.25rem;
    top: 1.6rem;
  }

  .about-partner {
    padding: 2.25rem 2rem;
  }
}