.page-about {
  --about-grid-gap: clamp(1.75rem, 3vw, 3rem);
  --about-heading-scale: clamp(2.5rem, 5.5vw, 4.5rem);
  background: var(--color-neutral);
  color: var(--color-text);
}

/* ---------- 顶部英雄区 ---------- */
.page-about__hero {
  --hero-pad-top: clamp(1.5rem, 4vw, 3rem);
  position: relative;
  background: var(--color-primary);
  color: var(--color-neutral);
  overflow: hidden;
  padding: var(--hero-pad-top) 0 clamp(3rem, 6vw, 5rem);
}

.page-about__hero-orn {
  position: absolute;
  right: 0;
  top: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.page-about__hero .site-container {
  position: relative;
  z-index: 1;
}

.page-about__breadcrumb .site-breadcrumb__link {
  color: rgba(245, 247, 250, 0.85);
}

.page-about__breadcrumb .site-breadcrumb__item {
  color: rgba(245, 247, 250, 0.65);
}

.page-about__breadcrumb .site-breadcrumb__item[aria-current="page"] {
  color: var(--color-gold);
}

.page-about__hero-grid {
  margin-top: clamp(2rem, 5vw, 3.5rem);
  display: grid;
  gap: var(--about-grid-gap);
}

.page-about__hero-copy {
  display: grid;
  gap: 1.25rem;
}

.page-about__hero-kicker {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-accent);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 0;
}

.page-about__hero h1 {
  font-family: var(--font-heading);
  font-size: var(--about-heading-scale);
  line-height: 1.02;
  letter-spacing: 0.01em;
  color: var(--color-neutral);
  margin: 0;
  text-transform: uppercase;
}

.page-about__hero-strong {
  display: inline-block;
  color: var(--color-gold);
}

.page-about__hero-tagline {
  font-family: var(--font-heading);
  font-size: clamp(1.15rem, 2.4vw, 1.65rem);
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin: 0;
  text-transform: uppercase;
}

.page-about__hero-intro {
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(245, 247, 250, 0.88);
  max-width: 58ch;
  margin: 0;
}

.page-about__hero-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.page-about__hero-navlink {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.8rem;
  border: 1px solid var(--color-line);
  background: rgba(30, 58, 110, 0.35);
  color: var(--color-neutral);
  font-size: 0.85rem;
  text-decoration: none;
  transition: border-color var(--transition), background var(--transition);
}

.page-about__hero-navlink span {
  font-family: var(--font-mono);
  color: var(--color-accent);
}

.page-about__hero-navlink:hover,
.page-about__hero-navlink:focus-visible {
  border-color: var(--color-accent);
  background: rgba(255, 107, 44, 0.12);
}

.page-about__hero-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.page-about__hero-block {
  background: var(--color-secondary);
  border-left: 0.35rem solid var(--color-accent);
  padding: 1.25rem 1.1rem;
  display: grid;
  gap: 0.25rem;
}

.page-about__hero-num {
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 3vw, 2.5rem);
  font-weight: 600;
  color: var(--color-neutral);
  line-height: 1.15;
}

.page-about__hero-label {
  font-size: 0.8rem;
  color: var(--color-gray);
}

/* 动效兼容 */
.page-about__hero .speed-line {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
}

/* ---------- 品牌故事 ---------- */
.page-about__story {
  position: relative;
  padding: clamp(4rem, 8vw, 7rem) 0;
  background: var(--color-neutral);
}

.page-about__story-rotate {
  position: absolute;
  right: 0.5rem;
  top: 3.5rem;
  color: rgba(176, 190, 197, 0.55);
  pointer-events: none;
}

.page-about__story-grid {
  display: grid;
  gap: var(--about-grid-gap);
}

.page-about__story-aside {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.page-about__story-copy {
  display: grid;
  gap: 1.25rem;
  align-content: start;
  font-size: 1rem;
  line-height: 1.9;
}

.page-about__story-copy p {
  margin: 0;
}

.page-about__story-figure {
  margin: 0;
  position: relative;
}

.page-about__story-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 1.25rem), 0 100%);
}

.page-about__story-figure .site-visual__caption {
  border-left: 3px solid var(--color-accent);
}

.page-about__story-points {
  margin-top: clamp(2.5rem, 5vw, 4rem);
  border-top: 1px solid var(--color-line);
  padding-top: 2rem;
  display: grid;
  gap: 1.5rem;
}

.page-about__story-point {
  display: grid;
  gap: 0.5rem;
  padding: 1.25rem;
  background: var(--color-neutral);
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--color-gold);
}

.page-about__story-point h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0;
  color: var(--color-primary);
}

.page-about__story-point p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--color-primary);
  opacity: 0.88;
  margin: 0;
}

/* ---------- 发展历程 ---------- */
.page-about__journey {
  position: relative;
  background: var(--color-primary);
  color: var(--color-neutral);
  padding: clamp(4rem, 8vw, 7rem) 0;
}

.page-about__journey .section-title h2 {
  color: var(--color-neutral);
}

.page-about__journey .section-title__caption {
  color: var(--color-gray);
}

.page-about__journey-rotate {
  position: absolute;
  right: 1rem;
  top: 4.5rem;
  color: rgba(176, 190, 197, 0.4);
  pointer-events: none;
}

.page-about__journey-layout {
  margin-top: clamp(2rem, 4vw, 3rem);
  display: grid;
  gap: var(--about-grid-gap);
}

.page-about__journey-years {
  position: relative;
  display: grid;
  align-content: start;
  gap: 2.25rem;
  padding-left: 1.25rem;
}

.page-about__journey-years::before {
  content: "";
  position: absolute;
  left: 0.375rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-accent), var(--color-gold));
}

.page-about__journey-pin {
  position: relative;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.page-about__journey-dot {
  position: absolute;
  left: -0.5rem;
  width: 0.85rem;
  height: 0.85rem;
  background: var(--color-primary);
  border: 3px solid var(--color-accent);
  transform: rotate(45deg);
  box-sizing: border-box;
}

.page-about__journey-year {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  line-height: 1;
  color: var(--color-accent);
}

.page-about__journey-info {
  display: grid;
  gap: 2rem;
  align-content: start;
}

.page-about__journey-cards {
  display: grid;
  gap: 1.25rem;
}

.page-about__journey-card {
  background: var(--color-secondary);
  border-left: 4px solid var(--color-gold);
  padding: 1.25rem 1.4rem;
  display: grid;
  gap: 0.45rem;
}

.page-about__journey-card h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-neutral);
  margin: 0;
}

.page-about__journey-card p {
  font-size: 0.95rem;
  line-height: 1.75;
  color: rgba(245, 247, 250, 0.82);
  margin: 0;
}

.page-about__journey-figure {
  margin: 0;
}

.page-about__journey-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--color-line);
}

.page-about__journey-figure .site-visual__caption {
  color: var(--color-gray);
}

/* ---------- 团队与能力 ---------- */
.page-about__team {
  background: var(--color-neutral);
  padding: clamp(4rem, 8vw, 7rem) 0;
}

.page-about__team-grid {
  display: grid;
  gap: var(--about-grid-gap);
}

.page-about__team-copy {
  display: grid;
  gap: 1.25rem;
  align-content: start;
}

.page-about__team-copy p {
  font-size: 1rem;
  line-height: 1.9;
  margin: 0;
}

.page-about__team-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  align-content: start;
}

.page-about__team-stat {
  position: relative;
  display: grid;
  gap: 0.5rem;
  align-content: start;
  background: var(--color-primary);
  color: var(--color-neutral);
  padding: 1.6rem 1.25rem 1.4rem;
  border-top: 4px solid var(--color-accent);
  clip-path: polygon(0 0, calc(100% - 1rem) 0, 100% 1rem, 100% 100%, 0 100%);
}

.page-about__team-stat .site-data {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 600;
  line-height: 1.15;
  color: var(--color-neutral);
}

.page-about__team-stat .site-data__label {
  font-size: 0.875rem;
  color: var(--color-gray);
  line-height: 1.5;
}

.page-about__team-figure {
  margin: clamp(2.5rem, 5vw, 4rem) 0 0;
}

.page-about__team-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--color-line);
}

/* ---------- 承诺 ---------- */
.page-about__commit {
  background: var(--color-secondary);
  color: var(--color-neutral);
  padding: clamp(4rem, 8vw, 7rem) 0;
}

.page-about__commit .section-title h2 {
  color: var(--color-neutral);
}

.page-about__commit .section-title__caption {
  color: var(--color-gray);
}

.page-about__commit-grid {
  margin-top: clamp(2.5rem, 4vw, 3.5rem);
  display: grid;
  gap: 1.25rem;
}

.page-about__commit-card {
  position: relative;
  background: var(--color-primary);
  border-top: 0.35rem solid var(--color-accent);
  padding: 2rem 1.5rem 1.75rem;
  display: grid;
  gap: 0.75rem;
}

.page-about__commit-num {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-gold);
  letter-spacing: 0.08em;
}

.page-about__commit-card h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-neutral);
  margin: 0;
}

.page-about__commit-card p {
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(245, 247, 250, 0.84);
  margin: 0;
}

/* ---------- 联系团队 ---------- */
.page-about__contact {
  background: var(--color-neutral);
  padding: clamp(4rem, 8vw, 7rem) 0;
}

.page-about__contact-grid {
  display: grid;
  gap: var(--about-grid-gap);
}

.page-about__contact-copy {
  display: grid;
  gap: 1.25rem;
  align-content: start;
}

.page-about__contact-copy p {
  font-size: 1rem;
  line-height: 1.9;
  margin: 0;
}

.page-about__contact-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.75rem;
  align-content: start;
}

.page-about__contact-item {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  border-bottom: 1px dashed var(--color-line);
  padding-bottom: 0.75rem;
}

.page-about__contact-item dt {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.page-about__contact-item dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--color-primary);
  text-align: right;
}

.page-about__contact-note {
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--color-gray);
  margin: 2rem 0 0;
  border-left: 3px solid var(--color-gold);
  padding-left: 0.9rem;
}

/* ---------- 动画辅助 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about * {
    animation: none !important;
    transition: none !important;
  }
}

/* ---------- Tablet ---------- */
@media (min-width: 768px) {
  .page-about__story-points {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about__journey-layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 3rem;
  }

  .page-about__team-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 3rem;
  }

  .page-about__commit-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }

  .page-about__contact-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 3rem;
  }
}

/* ---------- Desktop ---------- */
@media (min-width: 1024px) {
  .page-about__hero-grid {
    grid-template-columns: repeat(12, 1fr);
    gap: 2.5rem;
  }

  .page-about__hero-copy {
    grid-column: 1 / 9;
  }

  .page-about__hero-panel {
    grid-column: 9 / 13;
    align-content: start;
    gap: 1.25rem;
  }

  .page-about__story-grid {
    grid-template-columns: repeat(12, 1fr);
    gap: 2.5rem;
  }

  .page-about__story-aside {
    grid-column: 1 / 4;
  }

  .page-about__story-copy {
    grid-column: 4 / 9;
  }

  .page-about__story-figure {
    grid-column: 9 / 13;
  }

  .page-about__story-points {
    grid-column: 1 / -1;
  }

  .page-about__journey-cards {
    gap: 1.5rem;
  }

  .page-about__team-stats {
    gap: 1.25rem;
  }

  .page-about__contact-list {
    gap: 1.25rem;
  }
}