.page-about {
  --about-hero-line: linear-gradient(90deg, var(--clr-gold), var(--clr-neon) 60%, var(--clr-accent));
  background: var(--clr-light);
  color: var(--clr-dark);
  overflow-x: hidden;
}

/* ===== 首屏封面 ===== */
.page-about .about-hero {
  position: relative;
  background: var(--clr-primary);
  color: var(--clr-text);
  padding: var(--space-md) 0 var(--space-xl);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  width: 340px;
  height: 340px;
  right: -80px;
  top: -80px;
  border: 24px solid var(--clr-primary-light);
  border-radius: 50%;
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: var(--about-hero-line);
  pointer-events: none;
}

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

.page-about .about-hero .breadcrumb__link,
.page-about .about-hero .breadcrumb__current {
  color: var(--clr-text-dim);
}

.page-about .about-hero .breadcrumb__link:hover {
  color: var(--clr-gold);
}

.page-about .about-hero .breadcrumb__item + .breadcrumb__item::before {
  color: var(--clr-text-dim);
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-lg);
  padding-top: var(--space-lg);
}

.page-about .about-hero__main {
  max-width: 680px;
}

.page-about .about-hero__title {
  font-family: var(--font-headline);
  font-size: var(--h1);
  line-height: 0.98;
  letter-spacing: 0.02em;
  margin: var(--space-sm) 0;
  color: var(--clr-text);
}

.page-about .about-hero__lead {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--clr-text-dim);
  margin: 0;
  max-width: 60ch;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
  margin: 0;
}

.page-about .about-hero__stat {
  background: var(--clr-dark);
  border: 1px solid var(--clr-neon);
  padding: var(--space-md) var(--space-sm);
  text-align: center;
  box-shadow: var(--shadow-box);
}

.page-about .about-hero__stat dt {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--clr-text-dim);
  text-transform: uppercase;
}

.page-about .about-hero__stat dd {
  font-family: var(--font-data);
  font-size: var(--h3);
  font-weight: 700;
  color: var(--clr-gold);
  margin: var(--space-xs) 0 0;
  line-height: 1.2;
}

/* ===== 品牌故事 ===== */
.page-about .about-story {
  background: var(--clr-light);
  color: var(--clr-dark);
  padding: var(--space-xl) 0;
}

.page-about .about-story__grid {
  display: grid;
  gap: var(--space-lg);
  align-items: center;
}

.page-about .about-story__media {
  position: relative;
  border: 3px solid var(--clr-dark);
  background: var(--clr-dark);
  box-shadow: var(--shadow-box);
}

.page-about .about-story__media::after {
  content: "";
  position: absolute;
  right: -12px;
  top: 12px;
  width: 100%;
  height: 100%;
  border: 2px solid var(--clr-accent);
  z-index: 0;
  pointer-events: none;
}

.page-about .about-story__img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-story__content {
  padding-top: var(--space-sm);
}

.page-about .about-story__title {
  font-family: var(--font-headline);
  font-size: var(--h2);
  line-height: 1.08;
  margin: var(--space-xs) 0 var(--space-md);
  color: var(--clr-dark);
  max-width: 16ch;
}

.page-about .about-story__content p {
  line-height: 1.75;
  margin: 0 0 var(--space-md);
  color: var(--clr-dark);
  opacity: 0.86;
}

.page-about .about-story__facts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 2px solid var(--clr-dark);
}

.page-about .about-story__facts span {
  font-family: var(--font-data);
  font-size: 0.875rem;
  font-weight: 700;
  background: var(--clr-dark);
  color: var(--clr-text);
  padding: var(--space-xs) var(--space-sm);
  border-left: 3px solid var(--clr-gold);
}

/* ===== 发展历程 ===== */
.page-about .about-journey {
  background: var(--clr-dark);
  color: var(--clr-text);
  padding: var(--space-xl) 0;
}

.page-about .about-journey__head {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--clr-neon);
}

.page-about .about-journey__title {
  font-family: var(--font-headline);
  font-size: var(--h2);
  margin: var(--space-xs) 0 0;
  color: var(--clr-text);
}

.page-about .about-journey__note {
  font-size: 0.875rem;
  color: var(--clr-text-dim);
  margin: 0;
}

.page-about .about-journey .section-label {
  color: var(--clr-gold);
}

.page-about .about-journey__track {
  display: grid;
  gap: var(--space-sm);
}

.page-about .about-journey__item {
  position: relative;
  border: 1px solid rgba(45, 225, 167, 0.28);
  border-left: 4px solid var(--clr-gold);
  background: var(--clr-primary);
  transition: border-color 0.25s ease, background-color 0.25s ease;
}

.page-about .about-journey__item[data-open] {
  background: var(--clr-primary-light);
  border-left-color: var(--clr-accent);
}

.page-about .about-journey__trigger {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-sm) var(--space-md);
  align-items: center;
  width: 100%;
  padding: var(--space-md);
  border: 0;
  background: transparent;
  color: inherit;
  text-align: left;
  cursor: pointer;
}

.page-about .about-journey__year {
  grid-row: 1;
  grid-column: 1;
  min-width: 4.5rem;
  font-family: var(--font-headline);
  font-size: var(--h3);
  color: var(--clr-gold);
}

.page-about .about-journey__mark {
  grid-row: 1;
  grid-column: 2;
  align-self: center;
  font-weight: 700;
  font-size: 1.05rem;
}

.page-about .about-journey__arrow {
  grid-row: 1;
  grid-column: 3;
  justify-self: end;
  width: 24px;
  height: 24px;
}

.page-about .about-journey__arrow::before {
  content: "▾";
  display: inline-block;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1;
  color: var(--clr-accent);
  transition: transform 0.2s ease;
}

.page-about .about-journey__item[data-open] .about-journey__arrow::before {
  transform: rotate(180deg);
}

.page-about .about-journey__synopsis {
  grid-row: 2;
  grid-column: 2 / -1;
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--clr-warm-border);
  margin: 0;
}

.page-about .about-journey__item .accordion-item__content {
  margin: 0 var(--space-md);
  padding: var(--space-sm) var(--space-md) var(--space-md) var(--space-lg);
  border-top: 1px solid rgba(45, 225, 167, 0.2);
  color: var(--clr-text-dim);
  font-size: 0.95rem;
  line-height: 1.75;
}

/* ===== 团队与资质 ===== */
.page-about .about-team {
  background: var(--clr-light);
  color: var(--clr-dark);
  padding: var(--space-xl) 0;
}

.page-about .about-team__grid {
  display: grid;
  gap: var(--space-lg);
}

.page-about .about-team__content {
  max-width: 56ch;
}

.page-about .about-team__title {
  font-family: var(--font-headline);
  font-size: var(--h2);
  line-height: 1.08;
  margin: var(--space-xs) 0 var(--space-md);
  color: var(--clr-dark);
}

.page-about .about-team__content p {
  line-height: 1.75;
  color: var(--clr-dark);
  opacity: 0.86;
}

.page-about .about-team__roles {
  display: grid;
  gap: var(--space-md);
}

.page-about .about-team__role {
  position: relative;
  border: 3px solid var(--clr-dark);
  padding: var(--space-lg) var(--space-md);
  background: var(--clr-light);
  box-shadow: var(--shadow-box);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.page-about .about-team__role:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-float);
  border-color: var(--clr-accent);
}

.page-about .about-team__role-num {
  display: block;
  font-family: var(--font-headline);
  font-size: clamp(3rem, 10vw, 5rem);
  line-height: 0.9;
  color: var(--clr-primary);
}

.page-about .about-team__role--editors .about-team__role-num {
  color: var(--clr-accent);
}

.page-about .about-team__role-label {
  display: block;
  font-family: var(--font-headline);
  font-size: 1.2rem;
  letter-spacing: 0.04em;
  margin-top: var(--space-xs);
  color: var(--clr-dark);
}

.page-about .about-team__role p {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--clr-dark);
  opacity: 0.8;
  margin: var(--space-sm) 0 0;
}

.page-about .about-team__qual {
  list-style: none;
  padding: 0;
  margin: var(--space-lg) 0 0;
  border-top: 2px solid var(--clr-dark);
}

.page-about .about-team__qual li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--clr-dark);
  font-weight: 600;
  font-size: 0.95rem;
}

.page-about .about-team__qual li::before {
  content: "";
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  background: var(--clr-gold);
  border: 1px solid var(--clr-dark);
}

.page-about .about-team__media {
  margin-top: var(--space-xl);
  border: 3px solid var(--clr-dark);
  background: var(--clr-dark);
  box-shadow: var(--shadow-box);
}

.page-about .about-team__img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-team__media figcaption {
  padding: var(--space-sm) var(--space-md);
  color: var(--clr-text-dim);
  font-family: var(--font-data);
  font-size: 0.8rem;
  line-height: 1.6;
}

/* ===== 愿景 ===== */
.page-about .about-vision {
  position: relative;
  background: var(--clr-primary);
  color: var(--clr-text);
  padding: var(--space-xl) 0;
  overflow: hidden;
}

.page-about .about-vision__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-lg);
  align-items: center;
}

.page-about .about-vision__media {
  border: 3px solid var(--clr-neon);
  background: var(--clr-dark);
  box-shadow: var(--shadow-float);
}

.page-about .about-vision__img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-vision__title {
  font-family: var(--font-headline);
  font-size: var(--h2);
  line-height: 1.08;
  margin: var(--space-xs) 0 var(--space-md);
  color: var(--clr-text);
}

.page-about .about-vision__content p {
  line-height: 1.8;
  color: var(--clr-text-dim);
  max-width: 58ch;
}

.page-about .about-vision .btn {
  margin-top: var(--space-md);
}

.page-about .about-vision .section-label {
  color: var(--clr-gold);
}

/* ===== 资源速览 ===== */
.page-about .about-directory {
  background: var(--clr-dark);
  color: var(--clr-text);
  padding: var(--space-xl) 0;
}

.page-about .about-directory__head {
  margin-bottom: var(--space-lg);
}

.page-about .about-directory__head h2 {
  font-family: var(--font-headline);
  font-size: var(--h2);
  margin: var(--space-xs) 0 0;
  color: var(--clr-text);
}

.page-about .about-directory .section-label {
  color: var(--clr-gold);
}

.page-about .about-directory__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}

.page-about .about-directory__item {
  display: block;
  background: var(--clr-primary);
  border: 2px solid var(--clr-neon);
  opacity: 0.9;
  padding: var(--space-md);
  color: var(--clr-text);
  text-decoration: none;
  transition: background-color 0.2s ease, transform 0.2s ease, opacity 0.2s ease;
}

.page-about .about-directory__item:hover {
  background: var(--clr-primary-light);
  opacity: 1;
  transform: translateY(-3px);
}

.page-about .about-directory__index {
  display: block;
  font-family: var(--font-data);
  font-size: 0.75rem;
  color: var(--clr-accent);
  margin-bottom: var(--space-xs);
}

.page-about .about-directory__name {
  display: block;
  font-family: var(--font-headline);
  font-size: 1.25rem;
  color: var(--clr-gold);
  margin-bottom: var(--space-xs);
}

.page-about .about-directory__desc {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--clr-text-dim);
}

/* ===== 桌面端增强 ===== */
@media (min-width: 768px) {
  .page-about .about-journey__track {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }

  .page-about .about-journey__item:last-child {
    grid-column: 1 / -1;
  }

  .page-about .about-team__roles {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }

  .page-about .about-directory__list {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-directory__item:nth-child(5) {
    grid-column: span 2;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 7fr 5fr;
    align-items: center;
    gap: var(--space-xl);
  }

  .page-about .about-story__grid {
    grid-template-columns: 5fr 6fr;
    gap: var(--space-xl);
  }

  .page-about .about-team__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }

  .page-about .about-vision__grid {
    grid-template-columns: 5fr 6fr;
    gap: var(--space-xl);
  }

  .page-about .about-journey__head {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
  }

  .page-about .about-journey__note {
    text-align: right;
  }
}