/* =====================
   品牌档案页 page-about
   ===================== */

.page-about .about-breadcrumb-sep {
  font-family: var(--font-mono);
  color: var(--brand);
  padding: 0 0.125rem;
}

/* ---------- 品牌档案首屏 ---------- */
.page-about .about-hero {
  background: var(--ink);
  color: var(--white);
  padding: 2.25rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 38%;
  height: 100%;
  background: linear-gradient(135deg, transparent 58%, rgba(211, 47, 47, 0.22) 58%);
  z-index: 0;
}

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

.page-about .about-hero .breadcrumb {
  display: flex;
  font-size: var(--fs-small);
  color: rgba(255, 255, 255, 0.58);
  margin-bottom: 3rem;
  font-family: var(--font-sans);
}

.page-about .about-hero .breadcrumb a {
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
  transition: color 0.2s;
}

.page-about .about-hero .breadcrumb a:hover {
  color: var(--gold);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.75rem;
  align-items: center;
}

.page-about .about-hero-copy {
  max-width: 700px;
}

.page-about .about-hero-kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: var(--gold);
  letter-spacing: 0.14em;
  border-left: 3px solid var(--brand);
  padding-left: 0.75rem;
  margin-bottom: 1.25rem;
}

.page-about .about-hero h1 {
  font-family: var(--font-serif);
  font-size: var(--fs-display);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 1.5rem;
}

.page-about .about-h1-sub {
  display: block;
  color: var(--gold);
  font-size: 0.68em;
  margin-top: 0.38em;
  letter-spacing: 0.02em;
}

.page-about .about-hero-lead {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.82);
  margin: 0 0 2rem;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
}

.page-about .about-hero-aside {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.375rem 1.25rem;
  padding: 1.75rem 1.5rem;
  background: linear-gradient(135deg, var(--brand), var(--deep-red));
  clip-path: polygon(0 0, 100% 4%, 100% 100%, 0 96%);
}

.page-about .about-hero-stat {
  display: flex;
  flex-direction: column;
  padding: 0.625rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}

.page-about .about-hero-stat-num {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.15;
  color: var(--white);
}

.page-about .about-hero-stat-num span {
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
}

.page-about .about-hero-stat-label {
  font-size: var(--fs-small);
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.45;
  margin-top: 0.25rem;
}

/* ---------- 01 品牌之源 ---------- */
.page-about .about-origin {
  padding: 5.5rem 0;
}

.page-about .about-origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-top: 3rem;
}

.page-about .about-origin-copy p {
  font-size: var(--fs-body);
  line-height: 1.85;
  color: var(--gray-800);
  margin: 0 0 1rem;
}

.page-about .about-origin-list {
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
  border-top: 3px solid var(--ink);
}

.page-about .about-origin-list li {
  position: relative;
  padding: 0.875rem 0 0.875rem 1.75rem;
  border-bottom: 1px solid rgba(10, 10, 10, 0.1);
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: var(--gray-800);
}

.page-about .about-origin-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--brand);
  font-family: var(--font-mono);
  font-weight: 700;
}

.page-about .about-origin-img,
.page-about .about-data-visual,
.page-about .about-team-img {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  margin: 0;
}

.page-about .about-origin-img img,
.page-about .about-data-visual img,
.page-about .about-team-img img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--sand);
  max-width: 100%;
}

.page-about .about-origin-img figcaption,
.page-about .about-data-visual figcaption,
.page-about .about-team-img figcaption {
  font-size: var(--fs-small);
  color: var(--gray-500);
  padding-top: 0.625rem;
  border-top: 3px solid var(--gold);
  line-height: 1.6;
}

/* ---------- 02 发展里程碑 ---------- */
.page-about .about-milestones {
  background: var(--ink);
  color: var(--white);
  padding: 5.5rem 0;
  position: relative;
}

.page-about .about-milestones::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--brand) 0%, var(--gold) 100%);
}

.page-about .section-index--light {
  color: var(--gold);
}

.page-about .section-title--light {
  color: var(--white);
}

.page-about .section-intro--light {
  color: rgba(255, 255, 255, 0.72);
}

.page-about .about-timeline {
  position: relative;
  margin-top: 4rem;
  padding-left: 2.5rem;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 0.625rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: linear-gradient(to bottom, var(--brand) 0%, var(--gold) 100%);
  border-radius: 2px;
}

.page-about .about-timeline-item {
  position: relative;
  margin-bottom: 2.75rem;
}

.page-about .about-timeline-item:last-child {
  margin-bottom: 0;
}

.page-about .about-timeline-dot {
  position: absolute;
  left: calc(-2.5rem + 0.625rem);
  top: 0.375rem;
  width: 0.875rem;
  height: 0.875rem;
  border-radius: 50%;
  background: var(--brand);
  border: 3px solid var(--ink);
  transform: translateX(-50%);
  box-shadow: 0 0 0 4px rgba(211, 47, 47, 0.28);
}

.page-about .about-timeline-year {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-data);
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.page-about .about-timeline-card {
  background: rgba(255, 255, 255, 0.05);
  border-left: 3px solid var(--brand);
  padding: 1.25rem 1.375rem;
}

.page-about .about-timeline-card h3 {
  font-family: var(--font-serif);
  font-size: var(--fs-card);
  font-weight: 900;
  color: var(--white);
  margin: 0 0 0.5rem;
}

.page-about .about-timeline-card p {
  margin: 0;
  font-size: var(--fs-small);
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.74);
}

.page-about .about-milestone-note {
  margin-top: 3rem;
  padding: 1.125rem 1.25rem;
  background: rgba(201, 162, 39, 0.08);
  border: 1px solid rgba(201, 162, 39, 0.4);
  border-left: 4px solid var(--gold);
  font-size: var(--fs-body);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.86);
}

/* ---------- 03 数据与覆盖 ---------- */
.page-about .about-data {
  padding: 5.5rem 0;
}

.page-about .about-data-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-top: 3rem;
  align-items: start;
}

.page-about .about-data-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.page-about .about-stat-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid rgba(10, 10, 10, 0.08);
  border-top: 4px solid var(--brand);
  padding: 1.5rem 1.25rem;
  box-shadow: 0 4px 16px rgba(10, 10, 10, 0.05);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.page-about .about-stat-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(10, 10, 10, 0.1);
}

.page-about .about-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 2.125rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--ink);
  margin-bottom: 0.375rem;
}

.page-about .about-stat-num span {
  color: var(--brand);
  font-size: 1.25rem;
  font-weight: 700;
}

.page-about .about-stat-label {
  font-size: var(--fs-small);
  line-height: 1.5;
  color: var(--gray-500);
}

.page-about .about-data-detail {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 3rem;
}

.page-about .about-detail-card {
  background: var(--white);
  border-left: 4px solid var(--gold);
  padding: 1.5rem 1.5rem 1.5rem 1.75rem;
  box-shadow: 0 2px 12px rgba(10, 10, 10, 0.045);
}

.page-about .about-detail-card h3 {
  font-family: var(--font-serif);
  font-size: var(--fs-card);
  font-weight: 900;
  color: var(--ink);
  margin: 0 0 0.5rem;
}

.page-about .about-detail-card p {
  margin: 0;
  font-size: var(--fs-small);
  line-height: 1.75;
  color: var(--gray-800);
}

/* ---------- 04 团队与协作 ---------- */
.page-about .about-team {
  background: var(--sand);
  padding: 5.5rem 0;
}

.page-about .about-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-top: 3rem;
  align-items: center;
}

.page-about .about-team-copy p {
  font-size: var(--fs-body);
  line-height: 1.85;
  color: var(--gray-800);
  margin: 0 0 1rem;
}

.page-about .about-team-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin: 1.25rem 0 1.5rem;
}

.page-about .about-team-stat {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border-bottom: 4px solid var(--brand);
  padding: 1.25rem 1.25rem 1rem;
}

.page-about .about-team-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--ink);
  margin-bottom: 0.375rem;
}

.page-about .about-team-stat-num span {
  color: var(--brand);
  font-size: 1.125rem;
  font-weight: 700;
}

.page-about .about-team-stat-label {
  font-size: var(--fs-small);
  color: var(--gray-500);
  line-height: 1.45;
}

/* ---------- 05 生态与合作 ---------- */
.page-about .about-ecosystem {
  background: var(--ink);
  color: var(--white);
  padding: 5.5rem 0;
  position: relative;
}

.page-about .about-ecosystem::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--gold) 0%, var(--brand) 100%);
}

.page-about .about-eco-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 3rem;
}

.page-about .about-eco-card {
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 4px solid var(--brand);
  padding: 1.75rem 1.5rem;
  transition: transform 0.3s var(--ease-out), border-color 0.3s var(--ease-out), background 0.3s var(--ease-out);
}

.page-about .about-eco-card:hover {
  transform: translateY(-5px);
  border-color: rgba(201, 162, 39, 0.6);
  background: rgba(255, 255, 255, 0.08);
}

.page-about .about-eco-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--gold);
  border: 1px solid rgba(201, 162, 39, 0.5);
  padding: 0.25rem 0.625rem;
  margin-bottom: 1rem;
}

.page-about .about-eco-card h3 {
  font-family: var(--font-serif);
  font-size: var(--fs-card);
  font-weight: 900;
  color: var(--white);
  margin: 0 0 0.5rem;
}

.page-about .about-eco-card p {
  font-size: var(--fs-small);
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.72);
  margin: 0;
}

.page-about .about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  margin-top: 3rem;
}

.page-about .data-chip--outline {
  border-color: rgba(201, 162, 39, 0.52);
  color: var(--gold);
  background: transparent;
}

/* ---------- 品牌使命 ---------- */
.page-about .about-mission {
  background: linear-gradient(135deg, var(--brand), var(--deep-red));
  padding: 5.5rem 0;
  position: relative;
  overflow: hidden;
}

.page-about .about-mission::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 14px,
    rgba(255, 255, 255, 0.06) 14px,
    rgba(255, 255, 255, 0.06) 16px
  );
  z-index: 0;
}

.page-about .about-mission-inner {
  position: relative;
  z-index: 1;
  max-width: 780px;
  margin: 0 auto;
  text-align: center;
}

.page-about .about-mission-inner h2 {
  font-family: var(--font-serif);
  font-size: var(--fs-section);
  font-weight: 900;
  color: var(--white);
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}

.page-about .about-mission-inner p {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.92);
  margin: 0 0 2rem;
}

.page-about .about-mission-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

/* ---------- 响应式：平板与桌面 ---------- */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 3.5rem 0 5rem;
  }

  .page-about .about-hero-grid {
    grid-template-columns: 1.45fr 0.55fr;
    gap: 2rem;
  }

  .page-about .about-hero-aside {
    padding: 2rem 1.75rem;
    gap: 0.375rem 1rem;
  }

  .page-about .about-origin-grid {
    grid-template-columns: 1fr 0.9fr;
    align-items: center;
    column-gap: 3.5rem;
  }

  .page-about .about-data-grid {
    grid-template-columns: 1fr 0.95fr;
    column-gap: 3rem;
  }

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

  .page-about .about-team-grid {
    grid-template-columns: 1fr 0.9fr;
    column-gap: 3.5rem;
  }

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

  .page-about .about-tags {
    justify-content: center;
  }
}

@media (min-width: 1024px) {
  .page-about .about-timeline-item {
    padding-left: 1.5rem;
  }

  .page-about .about-timeline-card {
    max-width: 720px;
  }

  .page-about .about-hero-aside {
    padding: 2.5rem;
  }

  .page-about .about-hero-stat-num {
    font-size: 2rem;
  }
}