.page-about {
  --line-soft: rgba(14, 79, 92, 0.18);
  --paper-card: #FBF7EA;
  background:
    linear-gradient(rgba(14, 79, 92, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14, 79, 92, 0.045) 1px, transparent 1px),
    var(--cream);
  background-size: 28px 28px, 28px 28px, auto;
  overflow-x: hidden;
}

.page-about img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ========== 英雄区 ========== */
.page-about .about-hero {
  position: relative;
  background:
    linear-gradient(135deg, transparent 0 68px, rgba(27, 154, 170, 0.35) 68px, rgba(27, 154, 170, 0.35) 128px, transparent 128px),
    var(--teal-dark);
  color: var(--cream);
  padding: 40px 0 56px;
  border-bottom: 6px solid var(--orange);
}
.page-about .about-hero .breadcrumb {
  margin-bottom: 28px;
}
.page-about .about-hero .breadcrumb a {
  color: rgba(245, 240, 224, 0.76);
}
.page-about .about-hero .breadcrumb a:hover {
  color: var(--orange-light);
}
.page-about .about-hero .breadcrumb-sep {
  color: rgba(245, 240, 224, 0.45);
}
.page-about .about-hero-main .tag-label {
  display: inline-block;
  margin-bottom: 18px;
}
.page-about .about-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(28px, 5vw, 46px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: 0.01em;
  max-width: 11em;
  margin: 0 0 20px;
  color: var(--cream);
}
.page-about .about-lede {
  max-width: 62ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(245, 240, 224, 0.9);
}
.page-about .about-hero-facts {
  margin-top: 32px;
  border-top: 1px solid rgba(245, 240, 224, 0.28);
  padding-top: 20px;
}
.page-about .about-hero-facts dl {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 0;
}
.page-about .about-hero-facts dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(245, 240, 224, 0.62);
  margin-bottom: 6px;
}
.page-about .about-hero-facts dd {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--orange);
  margin: 0;
  white-space: nowrap;
}
.page-about .chapter-strip {
  margin-top: 36px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-about .chapter-strip a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--cream);
  text-decoration: none;
  border: 1px solid rgba(245, 240, 224, 0.45);
  background: rgba(14, 59, 69, 0.35);
  padding: 8px 12px;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.page-about .chapter-strip a:hover {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--white);
}

/* ========== 章节通用 ========== */
.page-about .about-section {
  padding: 56px 0;
}
.page-about .about-section .section-block {
  margin-bottom: 40px;
}

/* ========== 品牌起源 ========== */
.page-about .about-origin .container {
  position: relative;
}
.page-about .origin-layout {
  display: grid;
  gap: 28px;
}
.page-about .origin-text p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.88;
  color: var(--brown);
}
.page-about .origin-proof {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
  padding: 18px 0 10px;
  border-top: 2px solid var(--teal);
  border-bottom: 1px solid var(--line-soft);
}
.page-about .origin-proof-item {
  display: flex;
  flex-direction: column;
}
.page-about .origin-proof-num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--teal);
  line-height: 1.2;
}
.page-about .origin-proof-label {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(45, 31, 20, 0.72);
}
.page-about .origin-figure {
  margin: 0;
  padding: 8px;
  background: var(--white);
  border: 2px solid var(--teal);
  box-shadow: 8px 8px 0 var(--teal-trans);
  transform: rotate(0.4deg);
}
.page-about .origin-figure img {
  display: block;
  width: 100%;
  height: auto;
}
.page-about .origin-figure figcaption {
  padding: 10px 4px 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--teal);
}

/* ========== 发展里程碑 ========== */
.page-about .about-milestones {
  background:
    radial-gradient(circle at 88% 12%, var(--teal-trans) 0, var(--teal-trans) 56px, transparent 56px),
    var(--white);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}
.page-about .milestone-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .milestone-item {
  --track-x: 47px;
  --dot-size: 14px;
  position: relative;
  padding-left: 56px;
  padding-bottom: 36px;
}
.page-about .milestone-item:last-child {
  padding-bottom: 8px;
}
.page-about .milestone-item::before {
  content: "";
  position: absolute;
  left: var(--track-x);
  top: 10px;
  bottom: 0;
  width: 2px;
  background: var(--teal);
  opacity: 0.18;
}
.page-about .milestone-item:last-child::before {
  display: none;
}
.page-about .milestone-item::after {
  content: "";
  position: absolute;
  left: calc(var(--track-x) - (var(--dot-size) / 2) + 1px);
  top: 6px;
  width: var(--dot-size);
  height: var(--dot-size);
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 3px var(--white), 0 0 0 4px rgba(14, 79, 92, 0.4);
}
.page-about .milestone-year {
  position: absolute;
  left: 0;
  top: 0;
  width: 40px;
  text-align: right;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--teal);
}
.page-about .milestone-item:first-child .milestone-year {
  color: var(--orange);
}
.page-about .milestone-body h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 900;
  color: var(--brown);
}
.page-about .milestone-body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: rgba(45, 31, 20, 0.82);
}

/* ========== QMH旧版面板 ========== */
.page-about .about-legacy {
  position: relative;
  background:
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.05) 0, rgba(255, 255, 255, 0.05) 2px, transparent 2px, transparent 14px),
    linear-gradient(180deg, var(--teal) 0%, var(--teal-dark) 100%);
  color: var(--cream);
  border-bottom: 6px solid var(--orange);
}
.page-about .about-legacy::before {
  content: "";
  display: block;
  height: 4px;
  margin-bottom: 40px;
  background: repeating-linear-gradient(90deg, var(--orange) 0 3px, transparent 3px 8px);
  opacity: 0.8;
}
.page-about .about-legacy .section-block {
  margin-bottom: 32px;
}
.page-about .about-legacy h2 {
  color: var(--cream);
}
.page-about .about-legacy .section-desc {
  color: rgba(245, 240, 224, 0.78);
}
.page-about .about-legacy .section-num {
  color: rgba(245, 240, 224, 0.28);
}
.page-about .legacy-layout {
  display: grid;
  gap: 32px;
}
.page-about .legacy-figure {
  margin: 0;
  padding: 6px;
  background: var(--white);
  border: 2px solid var(--orange);
  box-shadow: 8px 8px 0 rgba(247, 123, 34, 0.3);
}
.page-about .legacy-figure img {
  display: block;
  width: 100%;
  height: auto;
}
.page-about .legacy-figure figcaption {
  padding: 10px 4px 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--teal-dark);
}
.page-about .legacy-story p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.88;
  color: rgba(245, 240, 224, 0.92);
}
.page-about .legacy-features {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  border-top: 1px solid rgba(245, 240, 224, 0.32);
}
.page-about .legacy-features li {
  position: relative;
  padding: 14px 0 14px 24px;
  border-bottom: 1px solid rgba(245, 240, 224, 0.18);
  font-size: 14px;
  line-height: 1.75;
  color: rgba(245, 240, 224, 0.92);
}
.page-about .legacy-features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 10px;
  height: 10px;
  background: var(--orange);
}
.page-about .legacy-features strong {
  color: var(--orange-light);
}

/* ========== 本地化承诺 ========== */
.page-about .about-local {
  position: relative;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}
.page-about .about-local::before {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -48px;
  width: 280px;
  height: 230px;
  background:
    linear-gradient(120deg, transparent 0 34%, var(--teal-trans) 34% 42%, transparent 42%),
    linear-gradient(60deg, transparent 0 46%, var(--teal-trans) 46% 55%, transparent 55%),
    linear-gradient(160deg, transparent 0 62%, var(--teal-trans) 62% 70%, transparent 70%);
  transform: rotate(-8deg);
  opacity: 0.55;
  pointer-events: none;
}
.page-about .about-local .container {
  position: relative;
  z-index: 1;
}
.page-about .local-layout {
  display: grid;
  gap: 32px;
}
.page-about .local-story p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.88;
  color: var(--brown);
}
.page-about .local-points {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}
.page-about .local-points li {
  position: relative;
  padding: 10px 0 10px 28px;
  border-bottom: 1px dashed var(--line-soft);
  font-size: 14px;
  color: rgba(45, 31, 20, 0.82);
}
.page-about .local-points li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 18px;
  width: 12px;
  height: 12px;
  border: 2px solid var(--teal-2);
  transform: rotate(45deg);
}
.page-about .local-figure {
  margin: 0;
  padding: 8px;
  background: var(--white);
  border: 2px solid var(--teal);
}
.page-about .local-figure img {
  display: block;
  width: 100%;
  height: auto;
}
.page-about .local-figure figcaption {
  padding: 10px 4px 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--teal);
}

/* ========== 服务理念 ========== */
.page-about .about-philosophy {
  background: var(--paper-card);
  border-bottom: 1px solid var(--line-soft);
}
.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 32px 0 24px;
}
.page-about .filter-btn {
  appearance: none;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 8px 14px;
  border: 1px solid var(--teal);
  background: transparent;
  color: var(--teal);
  cursor: pointer;
  border-radius: 0;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.page-about .filter-btn:hover,
.page-about .filter-btn[aria-pressed="true"] {
  background: var(--teal);
  color: var(--cream);
}
.page-about .philosophy-grid {
  display: grid;
  gap: 16px;
}
.page-about .philosophy-card {
  margin: 0;
  padding: 20px;
  background: var(--cream);
  border: 1px solid var(--line-soft);
  border-top: 4px solid var(--teal-2);
  border-radius: 0;
}
.page-about .philosophy-card:nth-child(3n+2) {
  border-top-color: var(--orange);
}
.page-about .philosophy-card:nth-child(3n) {
  border-top-color: var(--teal);
}
.page-about .philosophy-card .tag-label {
  display: inline-block;
  margin-bottom: 12px;
}
.page-about .philosophy-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 900;
  color: var(--brown);
}
.page-about .philosophy-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(45, 31, 20, 0.82);
}

/* ========== 底部 CTA ========== */
.page-about .about-cta {
  background: var(--teal-dark);
  color: var(--cream);
  padding: 48px 0;
  border-top: 6px solid var(--orange);
}
.page-about .about-cta-inner {
  display: grid;
  gap: 20px;
}
.page-about .about-cta .tag-label {
  display: inline-block;
  margin-bottom: 10px;
}
.page-about .about-cta h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 24px;
  font-weight: 900;
  color: var(--cream);
}
.page-about .about-cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .about-cta .btn-primary {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--white);
}
.page-about .about-cta .btn-outline {
  border-color: rgba(245, 240, 224, 0.65);
  color: var(--cream);
}
.page-about .about-cta .btn-outline:hover {
  background: rgba(245, 240, 224, 0.12);
}

/* ========== 平板 ========== */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 52px 0 64px;
  }
  .page-about .about-hero h1 {
    font-size: 42px;
  }
  .page-about .origin-layout {
    grid-template-columns: 7fr 5fr;
    align-items: center;
    gap: 40px;
  }
  .page-about .legacy-layout {
    grid-template-columns: 5fr 7fr;
    align-items: center;
    gap: 40px;
  }
  .page-about .local-layout {
    grid-template-columns: 6fr 6fr;
    align-items: center;
    gap: 40px;
  }
  .page-about .philosophy-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .milestone-item {
    --track-x: 148px;
    --dot-size: 14px;
    padding-left: 164px;
  }
  .page-about .milestone-year {
    width: 140px;
    font-size: 26px;
  }
  .page-about .milestone-item::before {
    top: 12px;
  }
  .page-about .milestone-item::after {
    top: 7px;
  }
  .page-about .milestone-body h3 {
    font-size: 22px;
  }
}

/* ========== 桌面 ========== */
@media (min-width: 1024px) {
  .page-about .about-section {
    padding: 72px 0;
  }
  .page-about .about-hero-grid {
    display: grid;
    grid-template-columns: 7fr 3fr;
    gap: 48px;
    align-items: start;
  }
  .page-about .about-hero-facts {
    margin-top: 0;
    padding-top: 0;
    border-top: 0;
    border-left: 1px solid rgba(245, 240, 224, 0.28);
    padding-left: 32px;
  }
  .page-about .about-hero-facts dl {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .page-about .about-hero-facts dd {
    font-size: 24px;
  }
  .page-about .philosophy-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-cta {
    padding: 56px 0;
  }
  .page-about .about-cta-inner {
    grid-template-columns: 1fr auto;
    align-items: center;
  }
  .page-about .about-cta h2 {
    font-size: 28px;
  }
}