.page-about {
  --about-ink: rgba(245, 240, 230, 0.86);
  --about-gold-line: rgba(212, 175, 55, 0.35);
  --about-cream-deep: #EDE5D3;
  position: relative;
  overflow-x: hidden;
  background: var(--bd-green);
  color: var(--bd-cream);
}

.page-about section,
.page-about__hero {
  position: relative;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--bd-serif);
}

.page-about p {
  font-family: var(--bd-sans);
  line-height: 1.7;
}

.page-about a {
  transition: color 0.25s var(--bd-ease), background 0.25s var(--bd-ease), border-color 0.25s var(--bd-ease);
}

/* ===== 首屏英雄区 ===== */
.page-about__hero {
  padding: 44px 20px 64px;
  background:
    linear-gradient(115deg, transparent 0 44%, rgba(212, 175, 55, 0.08) 44% 46%, transparent 46%),
    radial-gradient(circle at 82% 18%, rgba(46, 139, 87, 0.3), transparent 55%),
    var(--bd-green);
}

.page-about__hero-inner {
  max-width: 1180px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

.page-about__hero-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.page-about__hero-text .breadcrumb {
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-family: var(--bd-mono);
  font-size: 0.78rem;
  color: var(--bd-gray);
}

.page-about__hero-text .breadcrumb a {
  color: var(--bd-cream);
  text-decoration: none;
}

.page-about__hero-text .breadcrumb a:hover {
  color: var(--bd-gold);
}

.page-about__hero-text .breadcrumb li + li::before {
  content: "·";
  margin-right: 6px;
  color: var(--bd-gold);
}

.page-about__hero-text .kicker {
  margin-bottom: 14px;
}

.page-about__hero-text h1 {
  margin: 0;
  font-size: clamp(1.6rem, 5.2vw, 3.1rem);
  line-height: 1.16;
  letter-spacing: 0.01em;
  color: var(--bd-cream);
  border-left: 6px solid var(--bd-gold);
  padding-left: 18px;
  max-width: 720px;
}

.page-about__hero-summary {
  margin: 20px 0 0;
  max-width: 640px;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--about-ink);
  border: 1px solid var(--about-gold-line);
  border-left: 5px solid var(--bd-gold);
  background: rgba(0, 0, 0, 0.2);
  padding: 16px 18px;
}

.page-about__hero-summary:first-line {
  color: var(--bd-gold);
}

.page-about__spy {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
  width: 100%;
}

.page-about__spy a {
  font-family: var(--bd-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--bd-gray);
  text-decoration: none;
  border: 1px solid rgba(169, 158, 142, 0.4);
  padding: 7px 14px;
  border-radius: 999px;
}

.page-about__spy a.is-active,
.page-about__spy a:hover {
  background: var(--bd-gold);
  color: var(--bd-green);
  border-color: var(--bd-gold);
}

.page-about__hero-media {
  position: relative;
  margin-top: 8px;
}

.page-about__hero-media img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 340px;
  object-fit: cover;
  border-radius: var(--bd-radius-xl);
  box-shadow: 0 24px 50px rgba(0, 0, 0, 0.4);
  filter: saturate(0.75) contrast(1.05);
}

.page-about__hero-coord {
  position: absolute;
  right: 12px;
  bottom: 12px;
  background: var(--bd-black);
  color: var(--bd-gold);
  font-family: var(--bd-mono);
  font-size: 0.65rem;
  padding: 4px 8px;
  letter-spacing: 0.1em;
  border-radius: 3px;
}

/* ===== 暗红分隔带 ===== */
.page-about__redband {
  background: var(--bd-red);
  color: rgba(245, 240, 230, 0.9);
  text-align: center;
  font-family: var(--bd-mono);
  font-size: 0.68rem;
  letter-spacing: 0.3em;
  padding: 10px 16px;
  text-transform: uppercase;
}

.page-about__redband span {
  display: inline-block;
  transform: skewX(-12deg);
}

.page-about__redband--scale {
  border-top: 1px solid rgba(212, 175, 55, 0.2);
  border-bottom: 1px solid rgba(212, 175, 55, 0.2);
}

/* ===== 品牌故事 ===== */
.page-about__story {
  padding: 64px 0 72px;
}

.page-about__story .split-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about__story .split-aside {
  align-self: start;
  padding-bottom: 8px;
}

.page-about__story .split-aside::after {
  content: "";
  width: 44px;
  height: 3px;
  background: var(--bd-gold);
  display: block;
  margin-top: 16px;
}

.page-about__asidenote {
  font-size: 0.9rem;
  color: var(--bd-gray);
  max-width: 320px;
  margin: 16px 0 0;
}

.page-about__story-main {
  display: grid;
  gap: 14px;
}

.page-about__story-main p {
  margin: 0;
  padding: 14px 18px;
  background: rgba(5, 35, 26, 0.45);
  border-left: 4px solid var(--bd-lgreen);
  border-radius: var(--bd-radius-md);
  color: var(--about-ink);
}

.page-about__story-main p:first-child {
  border-left-color: var(--bd-gold);
  background: rgba(212, 175, 55, 0.08);
  font-size: 1.02rem;
}

/* ===== 里程碑 / 时间线 ===== */
.page-about__milestones {
  padding: 72px 0 80px;
  background:
    repeating-linear-gradient(135deg, rgba(212, 175, 55, 0.025) 0 6px, transparent 6px 18px),
    var(--bd-green);
}

.page-about__mil-head {
  max-width: 520px;
  margin-bottom: 40px;
}

.page-about__mil-head .section-title {
  margin-bottom: 10px;
}

.page-about__mil-head p:not(.kicker) {
  color: var(--bd-gray);
  font-size: 0.94rem;
}

.page-about__mil-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  position: relative;
}

.page-about__mil-svg {
  position: absolute;
  left: 15px;
  top: 24px;
  bottom: 24px;
  width: 2px;
  pointer-events: none;
}

.page-about__mil-svg svg {
  width: 100%;
  height: 100%;
  display: block;
}

.page-about__timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about__timeline-item {
  position: relative;
  margin: 0 0 26px;
  padding: 0 0 0 46px;
}

.page-about__timeline-dot {
  position: absolute;
  left: 8px;
  top: 14px;
  width: 16px;
  height: 16px;
  background: var(--bd-green);
  border: 3px solid var(--bd-gold);
  transform: rotate(45deg);
  z-index: 1;
}

.page-about__timeline-year {
  display: inline-block;
  font-family: var(--bd-mono);
  font-weight: bold;
  font-size: 1.35rem;
  color: var(--bd-gold);
  letter-spacing: 0.04em;
  margin-bottom: 6px;
  background: rgba(212, 175, 55, 0.08);
  padding: 0 8px;
}

.page-about__timeline-panel {
  background: var(--bd-cream);
  color: #2b2b2b;
  padding: 18px 20px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
}

.page-about__timeline-panel h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  color: var(--bd-green);
  letter-spacing: 0.02em;
}

.page-about__timeline-panel p {
  margin: 0;
  color: rgba(43, 43, 43, 0.85);
  font-size: 0.88rem;
  line-height: 1.7;
}

.page-about__mil-aside {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about__mil-aside img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--bd-radius-lg);
  border: 2px solid rgba(212, 175, 55, 0.3);
  filter: saturate(0.8) contrast(1.1);
}

.page-about__mil-aside p {
  margin: 0;
  font-size: 0.82rem;
  color: var(--bd-gray);
  border-left: 3px solid var(--bd-gold);
  padding-left: 12px;
}

.page-about__mil-note {
  margin: 28px 0 0;
  font-size: 0.87rem;
  color: var(--bd-gray);
}

.page-about__mil-note a,
.page-about__arch-link a {
  color: var(--bd-gold);
  text-decoration: none;
  border-bottom: 1px dotted var(--bd-gold);
}

.page-about__mil-note a:hover,
.page-about__arch-link a:hover {
  color: var(--bd-cream);
  border-bottom-color: var(--bd-cream);
}

/* ===== 平台规模 ===== */
.page-about__scale {
  padding: 28px 0 72px;
  background:
    radial-gradient(circle at 100% 0%, rgba(46, 139, 87, 0.22), transparent 40%),
    var(--bd-green);
}

.page-about__scale-head {
  margin: 48px 0 30px;
}

.page-about__scale-head .section-title {
  color: var(--bd-cream);
}

.page-about__scale-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-bottom: 34px;
}

.page-about__scale-card {
  background: var(--bd-cream);
  color: var(--bd-green);
  padding: 24px 22px;
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.page-about__scale-card::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 48px;
  height: 48px;
  background: var(--bd-gold);
  opacity: 0.12;
  clip-path: polygon(100% 0, 0 100%, 100% 100%);
}

.page-about__scale-num {
  display: inline-block;
  background: var(--bd-green);
  color: var(--bd-gold);
  font-family: var(--bd-mono);
  font-weight: bold;
  font-size: clamp(1.6rem, 3.6vw, 2.1rem);
  padding: 8px 14px;
  margin-bottom: 16px;
  line-height: 1;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
}

.page-about__scale-label {
  margin: 0;
  font-size: 1rem;
  letter-spacing: 0.02em;
}

.page-about__scale-card p {
  margin: 12px 0 0;
  font-size: 0.87rem;
  color: rgba(11, 61, 46, 0.85);
  line-height: 1.65;
}

.page-about__scale-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.page-about__scale-meta-item {
  background: rgba(11, 61, 46, 0.5);
  border: 1px solid rgba(212, 175, 55, 0.22);
  padding: 12px 14px;
  border-radius: var(--bd-radius-sm);
}

.page-about__scale-meta-item span,
.page-about__scale-meta-item strong {
  display: block;
  font-family: var(--bd-sans);
}

.page-about__scale-meta-item span {
  font-size: 0.75rem;
  color: var(--bd-gray);
  margin-bottom: 4px;
}

.page-about__scale-meta-item strong {
  font-size: 0.82rem;
  color: var(--bd-gold);
}

/* ===== 技术架构 ===== */
.page-about__architecture {
  padding: 66px 0 110px;
  background:
    linear-gradient(90deg, rgba(6, 38, 28, 0.55), transparent 60%),
    var(--bd-green);
}

.page-about__architecture .split-layout {
  display: grid;
  gap: 28px;
}

.page-about__architecture .split-aside {
  align-self: start;
}

.page-about__arch-aside {
  margin-top: 16px;
  font-size: 0.9rem;
  color: var(--bd-gray);
  max-width: 280px;
  border-left: 3px solid var(--bd-gold);
  padding-left: 14px;
}

.page-about__arch-body p {
  color: var(--about-ink);
  margin: 0 0 16px;
}

.page-about__arch-body p:first-child {
  color: var(--bd-gold);
  border-bottom: 1px solid var(--about-gold-line);
  padding-bottom: 12px;
}

.page-about__arch-media {
  margin: 24px 0;
}

.page-about__arch-media img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--bd-radius-lg);
  border: 1px solid rgba(212, 175, 55, 0.35);
}

.page-about__arch-link {
  font-size: 0.88rem;
  color: var(--bd-gray);
}

/* ===== 桌面端布局增强 ===== */
@media (min-width: 900px) {

  .page-about__hero {
    padding: 88px 40px 108px;
  }

  .page-about__hero-inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 56px;
  }

  .page-about__hero-text h1 {
    font-size: clamp(2.2rem, 4.6vw, 3.6rem);
    max-width: 700px;
  }

  .page-about__hero-media img {
    max-height: 520px;
  }

  .page-about__story {
    padding: 96px 0;
  }

  .page-about__story .split-layout {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 56px;
  }

  .page-about__story .split-aside {
    position: sticky;
    top: 108px;
  }

  .page-about__milestones {
    padding: 100px 0;
  }

  .page-about__mil-body {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 40px;
    align-items: start;
  }

  .page-about__timeline-panel {
    padding: 22px 26px;
  }

  .page-about__mil-aside {
    position: sticky;
    top: 110px;
  }

  .page-about__scale {
    padding: 44px 0 96px;
  }

  .page-about__scale-head {
    margin-top: 64px;
  }

  .page-about__scale-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about__scale-meta {
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
  }

  .page-about__architecture {
    padding: 100px 0 140px;
  }

  .page-about__architecture .split-layout {
    grid-template-columns: minmax(260px, 340px) minmax(0, 1fr);
    gap: 56px;
  }

  .page-about__architecture .split-aside {
    position: sticky;
    top: 110px;
  }

  .page-about__arch-media img {
    max-height: 460px;
  }
}
<<<PHANTOM>>>