/* ========== 品牌档案页专属样式 ========== */
.page-about {
  --about-ink: #16233C;
  --about-ink-soft: #42506B;
  --about-orange-dark: #C2450F;
  --about-display-size: clamp(2.6rem, 6vw, 4.8rem);
  --about-lead-size: clamp(1.05rem, 1.6vw, 1.28rem);
  background:
    radial-gradient(ellipse 80% 50% at 85% -10%, rgba(57, 255, 20, 0.09), transparent 60%),
    radial-gradient(ellipse 70% 55% at -10% 30%, rgba(255, 107, 53, 0.12), transparent 55%),
    var(--color-bg);
  color: var(--color-text-light);
  overflow-x: hidden;
}

/* 面包屑：深色语境微调 */
.page-about .breadcrumb {
  margin-bottom: 1.75rem;
  padding-top: 0.5rem;
}
.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 0.45rem;
  color: rgba(255, 255, 255, 0.35);
}
.page-about .breadcrumb__link {
  color: var(--color-accent-green);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
}
.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible {
  text-decoration: underline;
  outline: none;
}
.page-about .breadcrumb__current {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* ===== 首屏品牌宣言 ===== */
.page-about .about-hero {
  position: relative;
  padding-bottom: 4rem;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -6rem;
  right: -8rem;
  width: 46%;
  height: 130%;
  background: linear-gradient(145deg, rgba(255, 107, 53, 0.22), rgba(57, 255, 20, 0.06) 60%, transparent 100%);
  clip-path: polygon(0 0, 78% 0, 100% 100%, 18% 100%);
  transform: skewX(-9deg);
  pointer-events: none;
  z-index: 0;
}
.page-about .about-hero__deco {
  position: absolute;
  top: 6rem;
  right: 2%;
  width: clamp(120px, 24vw, 320px);
  height: auto;
  opacity: 0.9;
  pointer-events: none;
  z-index: 0;
}
.page-about .about-hero__layout {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 2rem;
}
.page-about .about-hero__copy {
  position: relative;
  z-index: 1;
}
.page-about .about-hero__copy .section-title__kicker {
  color: var(--color-accent-orange);
}
.page-about .about-hero__title {
  margin: 0.75rem 0 1.1rem;
  font-family: var(--font-display);
  font-size: var(--about-display-size);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}
.page-about .about-hero__lead {
  max-width: 36rem;
  margin: 0 0 1.6rem;
  font-size: var(--about-lead-size);
  line-height: 1.65;
  color: var(--color-text-muted);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}
.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
  position: relative;
  z-index: 1;
}
.page-about .about-hero__fact {
  position: relative;
  overflow: hidden;
  padding: 1.15rem 1.25rem;
  background: rgba(18, 50, 91, 0.66);
  border: 1px solid rgba(255, 255, 255, 0.14);
}
.page-about .about-hero__fact::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 4px;
  background: var(--color-accent-orange);
}
.page-about .about-hero__fact:nth-child(even)::after {
  background: var(--color-accent-green);
}
.page-about .about-hero__fact-num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 4.5vw, 3.2rem);
  line-height: 1;
  color: var(--color-accent-orange);
}
.page-about .about-hero__fact:nth-child(even) .about-hero__fact-num {
  color: var(--color-accent-green);
}
.page-about .about-hero__fact-label {
  display: block;
  margin-top: 0.45rem;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}

/* ===== 故事原点（浅色章节） ===== */
.page-about .about-story,
.page-about .about-honors {
  background: var(--color-neutral-light);
  color: var(--about-ink);
}
.page-about .about-story {
  position: relative;
  overflow: hidden;
}
.page-about .about-story::before {
  content: "";
  position: absolute;
  bottom: -5rem;
  left: -3rem;
  width: 16rem;
  height: 16rem;
  border-radius: 50%;
  background: rgba(255, 107, 53, 0.08);
  pointer-events: none;
}
.page-about .about-story::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 8px;
  background: linear-gradient(90deg, var(--color-accent-orange), var(--color-accent-green));
  opacity: 0.75;
  pointer-events: none;
}
.page-about .about-story__grid {
  position: relative;
  display: grid;
  gap: 2.25rem;
  align-items: center;
}
.page-about .about-story .section-title__kicker,
.page-about .about-honors .section-title__kicker {
  color: var(--color-accent-orange);
}
.page-about .about-story .section-title__headline,
.page-about .about-honors .section-title__headline {
  color: var(--about-ink);
  font-size: clamp(2rem, 4.5vw, 3.4rem);
}
.page-about .about-story__lead {
  margin: 1.25rem 0 0.85rem;
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.6;
}
.page-about .about-story__text p {
  line-height: 1.7;
  color: var(--about-ink-soft);
}
.page-about .about-story__quote {
  margin: 1.4rem 0;
  padding: 0.9rem 1.1rem;
  border-left: 4px solid var(--color-accent-green);
  background: rgba(57, 255, 20, 0.14);
  font-size: 1rem;
  font-weight: 600;
  color: var(--about-ink);
}
.page-about .about-story__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}
.page-about .about-story__home {
  padding-bottom: 2px;
  border-bottom: 2px solid var(--color-accent-orange);
  color: var(--about-ink);
  font-weight: 700;
  text-decoration: none;
}
.page-about .about-story__home:hover,
.page-about .about-story__home:focus-visible {
  opacity: 0.7;
  outline: none;
}
.page-about .about-story__media {
  position: relative;
  max-width: 100%;
}
.page-about .about-story__media .media-frame,
.page-about .about-culture__media .media-frame {
  width: 100%;
  max-width: 100%;
}
.page-about .about-story__media img,
.page-about .about-culture__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .about-story__stamp {
  position: absolute;
  right: -0.75rem;
  bottom: -1rem;
  font-family: var(--font-display);
  font-size: clamp(4rem, 10vw, 7rem);
  line-height: 0.85;
  color: transparent;
  -webkit-text-stroke: 2px rgba(10, 31, 60, 0.18);
  pointer-events: none;
  z-index: 1;
}

/* ===== 发展里程碑（深色章节） ===== */
.page-about .about-milestones {
  position: relative;
  background: var(--color-bg);
}
.page-about .about-milestones::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(57, 255, 20, 0.05) 1px, transparent 1px),
    linear-gradient(rgba(57, 255, 20, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(180deg, transparent, #000 30%, #000 70%, transparent);
  pointer-events: none;
}
.page-about .about-milestones::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--color-accent-orange) 20%, var(--color-accent-green) 100%);
  opacity: 0.7;
  pointer-events: none;
}
.page-about .about-milestones .section-title__kicker {
  color: var(--color-accent-orange);
}
.page-about .about-milestones__head {
  position: relative;
  display: grid;
  gap: 0.5rem;
  margin-bottom: 1.6rem;
}
.page-about .about-milestones__intro {
  max-width: 34rem;
  margin: 0.5rem 0 0;
  line-height: 1.7;
  color: var(--color-text-muted);
}
.page-about .about-milestones__deco {
  display: block;
  width: 100%;
  max-width: 420px;
  height: auto;
  margin: 0 0 1.6rem;
}

/* 横向滚动时间轴 */
.page-about .about-timeline {
  position: relative;
  display: flex;
  gap: 1.1rem;
  overflow-x: auto;
  padding: 0.25rem 0.25rem 1.5rem;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}
.page-about .about-timeline__item {
  position: relative;
  flex: 0 0 84%;
  scroll-snap-align: center;
  list-style: none;
}
.page-about .about-timeline__item::after {
  content: attr(data-version);
  position: absolute;
  top: 0.9rem;
  right: 0.7rem;
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 8vw, 5.5rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(255, 255, 255, 0.12);
  pointer-events: none;
  z-index: 0;
}
.page-about .about-timeline__card {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 2rem 1.4rem 1.5rem;
  background: linear-gradient(150deg, rgba(18, 50, 91, 0.85), rgba(10, 31, 60, 0.9));
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-top: 4px solid var(--color-accent-orange);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}
.page-about .about-timeline__card:hover {
  transform: translateY(-6px);
  border-top-color: var(--color-accent-green);
  box-shadow: var(--shadow-lg);
}
.page-about .about-timeline__node {
  position: absolute;
  top: -1rem;
  left: 1.25rem;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  border-radius: 999px;
  background: var(--color-accent-orange);
  color: var(--color-bg);
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  box-shadow: 0 0 0 5px rgba(255, 107, 53, 0.22);
}
.page-about .about-timeline__item--v4 .about-timeline__node {
  background: var(--color-accent-green);
  box-shadow: 0 0 0 5px rgba(57, 255, 20, 0.18);
}
.page-about .about-timeline__tag {
  margin: 0 0 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent-green);
}
.page-about .about-timeline__card h3 {
  margin: 0 0 0.6rem;
  font-family: var(--font-body);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-light);
}
.page-about .about-timeline__card p:last-child {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--color-text-muted);
}
.page-about .about-timeline__item[data-reveal] {
  transition-delay: 0s;
}
.page-about .about-timeline__item[data-reveal]:nth-child(2) {
  transition-delay: 0.15s;
}
.page-about .about-timeline__item[data-reveal]:nth-child(3) {
  transition-delay: 0.3s;
}
.page-about .about-timeline__item[data-reveal]:nth-child(4) {
  transition-delay: 0.45s;
}

/* ===== 团队与文化（次深蓝章节） ===== */
.page-about .about-culture {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 70% 70% at 90% 90%, rgba(57, 255, 20, 0.1), transparent 55%),
    linear-gradient(135deg, var(--color-bg-secondary), #0d2547 65%, var(--color-bg));
}
.page-about .about-culture .section-title__kicker {
  color: var(--color-accent-green);
}
.page-about .about-culture__layout {
  display: grid;
  gap: 2.25rem;
  align-items: center;
}
.page-about .about-culture__media {
  position: relative;
  max-width: 100%;
}
.page-about .about-culture__lead {
  margin: 1.1rem 0 0;
  line-height: 1.7;
  color: var(--color-text-muted);
}
.page-about .about-culture__values {
  display: grid;
  gap: 0.75rem;
  margin: 1.5rem 0;
  padding: 0;
  list-style: none;
}
.page-about .about-culture__values li {
  display: flex;
  gap: 0.5rem;
  padding: 0.95rem 1.05rem;
  background: rgba(10, 31, 60, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-left: 4px solid var(--color-accent-green);
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-text-muted);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}
.page-about .about-culture__values li:hover {
  transform: translateX(6px);
  border-left-color: var(--color-accent-orange);
}
.page-about .about-culture__values strong {
  color: var(--color-text-light);
}
.page-about .about-culture__note {
  margin: 0 0 1.5rem;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--color-text-muted);
}

/* ===== 资质与荣誉（浅色章节） ===== */
.page-about .about-honors {
  position: relative;
}
.page-about .about-honors__head {
  display: grid;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}
.page-about .about-honors__lead {
  max-width: 32rem;
  margin: 0;
  line-height: 1.7;
  color: var(--about-ink-soft);
}
.page-about .about-honors__banner {
  position: relative;
  margin: 0 0 2.5rem;
  overflow: hidden;
}
.page-about .about-honors__banner img {
  display: block;
  width: 100%;
  height: 170px;
  object-fit: cover;
  filter: saturate(1.15) contrast(1.05);
}
.page-about .about-honors__grid {
  display: grid;
  gap: 1rem;
  margin-bottom: 2.5rem;
}
.page-about .about-honors__card {
  padding: 1.5rem 1.3rem 1.3rem;
  background: #ffffff;
  border: 1px solid rgba(10, 31, 60, 0.1);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}
.page-about .about-honors__card:hover {
  transform: translateY(-6px);
  background: #fffdf8;
  box-shadow: var(--shadow-lg);
}
.page-about .about-honors__badge {
  display: inline-block;
  margin-bottom: 0.7rem;
  padding: 0.22rem 0.6rem;
  border: 1px solid rgba(255, 107, 53, 0.45);
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--about-orange-dark);
}
.page-about .about-honors__card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--about-ink);
}
.page-about .about-honors__card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--about-ink-soft);
}
.page-about .about-honors__cta {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
  overflow: hidden;
  padding: 1.8rem 1.5rem;
  background: linear-gradient(120deg, var(--color-bg) 55%, var(--color-bg-secondary) 100%);
  color: var(--color-text-light);
  box-shadow: var(--shadow-lg);
}
.page-about .about-honors__cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 0.6rem;
  height: 100%;
  background: linear-gradient(180deg, var(--color-accent-orange), var(--color-accent-green));
}
.page-about .about-honors__cta::after {
  content: "";
  position: absolute;
  right: -1.5rem;
  bottom: -3rem;
  width: 10rem;
  height: 10rem;
  border-radius: 50%;
  background: rgba(57, 255, 20, 0.1);
  pointer-events: none;
}
.page-about .about-honors__cta-copy {
  position: relative;
  z-index: 1;
}
.page-about .about-honors__cta-kicker {
  margin: 0 0 0.25rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent-green);
}
.page-about .about-honors__cta-text {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.4vw, 1.6rem);
  color: var(--color-text-light);
}
.page-about .about-honors__cta .btn {
  position: relative;
  z-index: 1;
}

/* ===== 桌面端栅格与对齐 ===== */
@media (min-width: 620px) {
  .page-about .about-timeline__item {
    flex-basis: 46%;
  }
}

@media (min-width: 640px) {
  .page-about .about-honors__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 720px) {
  .page-about .about-milestones__head,
  .page-about .about-honors__head {
    grid-template-columns: 1fr 1fr;
    align-items: end;
  }
  .page-about .about-honors__banner img {
    height: 230px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 3rem;
    align-items: end;
  }
  .page-about .about-story__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 3rem;
  }
  .page-about .about-culture__layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 3rem;
  }
  .page-about .about-culture__media {
    order: -1;
  }
}

@media (min-width: 1024px) {
  .page-about .about-timeline__item {
    flex-basis: 23.5%;
    scroll-snap-align: start;
  }
}

@media (min-width: 1100px) {
  .page-about .about-honors__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}