.page-about {
  --pa-maxw: 1200px;
  background:
    radial-gradient(circle at 12% 0%, rgba(200, 16, 46, 0.07), transparent 34rem),
    var(--color-light);
  font-family: var(--font-sans);
  color: var(--color-charcoal);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ---------- 首屏英雄区 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(40px, 7vw, 84px) 0 clamp(36px, 5vw, 60px);
  background: linear-gradient(128deg, #0d0d0d 0%, #1e1e1e 62%, #0d0d0d 100%);
  color: var(--color-white);
  overflow: hidden;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, rgba(255, 255, 255, 0.05) 0%, transparent 24%),
    radial-gradient(circle at 78% 20%, rgba(200, 16, 46, 0.22), transparent 22rem);
  pointer-events: none;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -34%;
  width: 70%;
  height: 85%;
  background: linear-gradient(90deg, transparent, rgba(200, 16, 46, 0.42));
  clip-path: polygon(24% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}
.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
  max-width: var(--pa-maxw);
  margin: 0 auto;
  padding: 0 20px;
}
.page-about .about-hero__grid {
  display: grid;
  gap: 28px;
  align-items: end;
}
.page-about .about-hero__eyebrow {
  margin: 22px 0 0;
  font-family: var(--font-data);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-gold);
}
.page-about .about-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-serif);
  font-size: clamp(2rem, 6.4vw, 3.6rem);
  line-height: 1.18;
  letter-spacing: 0.01em;
  font-weight: 800;
  max-width: 760px;
}
.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 720px;
  font-size: 1.02rem;
  color: rgba(255, 255, 255, 0.84);
  border-left: 3px solid var(--color-primary);
  padding-left: 18px;
}
.page-about .about-hero__anchors {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin-top: 26px;
}
.page-about .about-hero__anchors a {
  color: rgba(255, 255, 255, 0.76);
  text-decoration: none;
  font-size: 0.88rem;
  padding: 6px 0;
  border-bottom: 1px solid transparent;
  transition: color var(--duration) var(--ease), border-color var(--duration) var(--ease);
}
.page-about .about-hero__anchors a:hover,
.page-about .about-hero__anchors a:focus-visible {
  color: var(--color-white);
  border-color: var(--color-primary);
}
.page-about .about-hero__meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: rgba(255, 255, 255, 0.09);
  border: 1px solid rgba(255, 255, 255, 0.12);
  margin: 0;
  box-shadow: var(--shadow-sm);
}
.page-about .about-hero__meta-item {
  background: rgba(13, 13, 13, 0.74);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 16px 14px;
}
.page-about .about-hero__meta dt {
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
}
.page-about .about-hero__meta dd {
  margin: 4px 0 0;
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--color-white);
}
.page-about .about-hero__meta dd span {
  color: var(--color-primary);
}

/* ---------- 通用章节面板 ---------- */
.page-about .about-section {
  max-width: var(--pa-maxw);
  margin: 0 auto;
  padding: clamp(48px, 7vw, 88px) 20px;
}
.page-about .about-panel-head {
  margin-bottom: clamp(28px, 4vw, 44px);
  max-width: 780px;
}
.page-about .about-panel-head .section-tag {
  margin-bottom: 14px;
}
.page-about .about-panel-head h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3.6vw, 2.4rem);
  line-height: 1.25;
  margin: 0 0 10px;
  letter-spacing: 0.01em;
}
.page-about .about-panel-head__desc {
  margin: 0;
  color: var(--color-gray);
  font-size: 1rem;
  max-width: 640px;
}

/* ---------- 品牌故事 ---------- */
.page-about .about-brand__grid {
  display: grid;
  gap: 40px;
  align-items: center;
}
.page-about .about-brand__text .section-tag {
  margin-bottom: 14px;
}
.page-about .about-brand__text h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3.6vw, 2.4rem);
  line-height: 1.25;
  margin: 0 0 16px;
}
.page-about .about-brand__abstract {
  font-size: 1.06rem;
  font-weight: 600;
  color: var(--color-black);
  border-left: 3px solid var(--color-primary);
  padding-left: 16px;
  margin-bottom: 18px;
}
.page-about .about-brand__text p {
  margin: 0 0 14px;
  color: var(--color-gray-dark);
}
.page-about .about-brand__proof {
  font-family: var(--font-data);
  font-size: 0.84rem;
  color: var(--color-gray) !important;
  border-top: 1px dashed rgba(107, 107, 107, 0.4);
  padding-top: 14px;
  margin-top: 22px;
}
.page-about .about-brand__figure {
  position: relative;
  margin: 0;
  padding: 12px;
  background: var(--color-white);
  box-shadow: 0 8px 30px rgba(13, 13, 13, 0.14);
  transform: rotate(0.4deg);
}
.page-about .about-brand__figure::before {
  content: "";
  position: absolute;
  inset: 0;
  border: 2px solid var(--color-primary);
  transform: translate(10px, 10px);
  pointer-events: none;
}
.page-about .about-brand__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  object-position: center;
}
.page-about .about-brand__figure figcaption {
  font-size: 0.82rem;
  color: var(--color-gray);
  padding-top: 10px;
  letter-spacing: 0.04em;
}

/* ---------- 发展里程碑 ---------- */
.page-about .about-milestones {
  background: var(--color-charcoal);
  color: var(--color-white);
  padding: clamp(48px, 7vw, 88px) 20px;
  position: relative;
  overflow: hidden;
}
.page-about .about-milestones::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 28%;
  height: 100%;
  background: linear-gradient(180deg, rgba(200, 16, 46, 0.2), transparent 60%);
  clip-path: polygon(24% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}
.page-about .about-milestones__inner {
  position: relative;
  z-index: 1;
  max-width: var(--pa-maxw);
  margin: 0 auto;
}
.page-about .about-milestones .section-tag--gold {
  margin-bottom: 14px;
}
.page-about .about-milestones h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3.6vw, 2.4rem);
  margin: 0 0 10px;
}
.page-about .about-milestones .about-panel-head__desc {
  color: rgba(255, 255, 255, 0.66);
}
.page-about .about-timeline {
  list-style: none;
  margin: 44px 0 0;
  padding: 0;
  position: relative;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 8px;
  bottom: 8px;
  width: 3px;
  background: rgba(255, 255, 255, 0.14);
  border-radius: 3px;
}
.page-about .about-timeline__item {
  position: relative;
  padding-left: 58px;
  margin-bottom: 16px;
}
.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 32px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-gold);
  border: 3px solid var(--color-charcoal);
  box-shadow: 0 0 0 2px var(--color-gold);
  z-index: 1;
}
.page-about .about-timeline__entry {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-left: 3px solid var(--color-primary);
  transition: border-color var(--duration) var(--ease), background var(--duration) var(--ease);
}
.page-about .about-timeline__entry[open] {
  border-left-color: var(--color-gold);
  background: rgba(255, 255, 255, 0.06);
}
.page-about .about-timeline__summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 18px 20px;
  font-family: var(--font-serif);
  color: var(--color-white);
}
.page-about .about-timeline__summary::-webkit-details-marker {
  display: none;
}
.page-about .about-timeline__summary::-moz-list-bullet {
  list-style-type: none;
}
.page-about .about-timeline__summary:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}
.page-about .about-timeline__year {
  font-family: var(--font-data);
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--color-primary);
  min-width: 62px;
  transition: color var(--duration) var(--ease);
}
.page-about .about-timeline__entry[open] .about-timeline__year {
  color: var(--color-gold);
}
.page-about .about-timeline__title {
  font-size: 1.12rem;
  font-weight: 700;
}
.page-about .about-timeline__desc {
  margin: 0;
  padding: 0 20px 18px 24px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.94rem;
  max-width: 68ch;
}

/* ---------- 数据统计带 ---------- */
.page-about .about-stats {
  background: var(--color-black);
  color: var(--color-white);
  padding: clamp(40px, 6vw, 64px) 20px;
  position: relative;
  overflow: hidden;
}
.page-about .about-stats::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-primary), var(--color-gold));
}
.page-about .about-stats__inner {
  max-width: var(--pa-maxw);
  margin: 0 auto;
}
.page-about .about-stats__intro {
  margin: 0 0 20px;
  font-family: var(--font-data);
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
}
.page-about .about-stats__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.page-about .about-stat {
  background: rgba(255, 255, 255, 0.05);
  border-right: 3px solid rgba(200, 16, 46, 0.65);
  padding: 22px 18px;
  transition: background var(--duration) var(--ease), border-color var(--duration) var(--ease);
}
.page-about .about-stat:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--color-primary);
}
.page-about .about-stat__num {
  margin: 0;
  font-size: clamp(1.9rem, 5vw, 3rem);
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.page-about .about-stat__num span {
  color: var(--color-primary);
}
.page-about .about-stat__label {
  margin: 8px 0 0;
  font-size: 0.86rem;
  color: rgba(255, 255, 255, 0.62);
  letter-spacing: 0.06em;
}

/* ---------- 技术架构 ---------- */
.page-about .about-architecture {
  background: var(--color-white);
  border-bottom: 1px solid rgba(107, 107, 107, 0.16);
}
.page-about .about-arch {
  display: grid;
  gap: 40px;
}
.page-about .about-arch__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}
.page-about .about-arch__step {
  position: relative;
  display: flex;
  gap: 18px;
  padding: 22px 20px;
  background: rgba(245, 245, 245, 0.72);
  border: 1px solid rgba(13, 13, 13, 0.08);
  border-left: 4px solid var(--color-primary);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: transform var(--duration) var(--ease), border-color var(--duration) var(--ease), background var(--duration) var(--ease);
}
.page-about .about-arch__step::after {
  content: "";
  position: absolute;
  right: -1px;
  top: 12px;
  bottom: 12px;
  width: 3px;
  background: linear-gradient(180deg, var(--color-gold), var(--color-primary));
  opacity: 0;
  transition: opacity var(--duration) var(--ease);
}
.page-about .about-arch__step:hover,
.page-about .about-arch__step:focus-within {
  background: rgba(242, 212, 212, 0.34);
  border-left-color: var(--color-gold);
  transform: translateX(4px);
}
.page-about .about-arch__step:hover::after,
.page-about .about-arch__step:focus-within::after {
  opacity: 1;
}
.page-about .about-arch__num {
  font-family: var(--font-data);
  font-weight: 800;
  font-size: 1rem;
  color: var(--color-primary);
  background: rgba(200, 16, 46, 0.1);
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  display: grid;
  place-items: center;
  border-radius: 50%;
}
.page-about .about-arch__body h3 {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-size: 1.1rem;
}
.page-about .about-arch__body p {
  margin: 0;
  color: var(--color-gray-dark);
  font-size: 0.94rem;
}
.page-about .about-arch__figure {
  margin: 0;
}
.page-about .about-arch__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  object-fit: cover;
  border-radius: 2px;
  box-shadow: var(--shadow);
}
.page-about .about-arch__figure figcaption {
  margin-top: 10px;
  font-family: var(--font-data);
  font-size: 0.82rem;
  color: var(--color-gray);
  letter-spacing: 0.06em;
}

/* ---------- 团队与文化 ---------- */
.page-about .about-team {
  background:
    linear-gradient(100deg, rgba(200, 16, 46, 0.05), transparent 30%),
    var(--color-light);
}
.page-about .about-team__grid {
  display: grid;
  gap: 40px;
  align-items: start;
}
.page-about .about-team__figure {
  position: relative;
  margin: 0;
}
.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  box-shadow: var(--shadow-sm);
}
.page-about .about-team__figure::after {
  content: "";
  position: absolute;
  right: -10px;
  bottom: -10px;
  width: 42%;
  height: 42%;
  background: var(--color-primary);
  clip-path: polygon(10% 0, 100% 0, 100% 100%, 0 100%);
  z-index: -1;
}
.page-about .about-team__figure figcaption {
  font-size: 0.82rem;
  color: var(--color-gray);
  margin-top: 8px;
}
.page-about .about-team__roles {
  display: grid;
  gap: 14px;
}
.page-about .about-team__role {
  background: var(--color-white);
  border-left: 3px solid var(--color-primary);
  padding: 18px 20px;
  box-shadow: 0 2px 8px rgba(13, 13, 13, 0.06);
  transition: border-color var(--duration) var(--ease), transform var(--duration) var(--ease);
}
.page-about .about-team__role:hover {
  border-left-color: var(--color-gold);
  transform: translateX(3px);
}
.page-about .about-team__role h3 {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-size: 1.08rem;
}
.page-about .about-team__role p {
  margin: 0;
  color: var(--color-gray-dark);
  font-size: 0.94rem;
}
.page-about .about-team__culture {
  margin: 6px 0 0;
  font-size: 0.96rem;
  color: var(--color-gray-dark);
  border-top: 1px dashed rgba(107, 107, 107, 0.4);
  padding-top: 16px;
}
.page-about .about-team__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

/* ---------- 用户评价 ---------- */
.page-about .about-quotes {
  background: var(--color-white);
}
.page-about .about-quotes__grid {
  display: grid;
  gap: 18px;
}
.page-about .about-quote {
  margin: 0;
  padding: 24px 24px 18px;
  background: color-mix(in srgb, var(--color-light) 80%, transparent);
  border: 1px solid rgba(13, 13, 13, 0.06);
  border-top: 3px solid var(--color-gold);
  position: relative;
}
.page-about .about-quote::before {
  content: "“";
  position: absolute;
  top: 6px;
  right: 16px;
  font-family: var(--font-serif);
  font-size: 3.2rem;
  color: rgba(200, 16, 46, 0.16);
  line-height: 1;
}
.page-about .about-quote p {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-size: 1.02rem;
  line-height: 1.65;
  color: var(--color-charcoal);
  position: relative;
}
.page-about .about-quote footer {
  font-size: 0.82rem;
  color: var(--color-gray);
  letter-spacing: 0.03em;
}

/* ---------- 底部信任区 ---------- */
.page-about .about-cta {
  background: var(--color-black);
  color: var(--color-white);
  padding: clamp(52px, 8vw, 88px) 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-about .about-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-primary), var(--color-gold));
}
.page-about .about-cta::after {
  content: "";
  position: absolute;
  left: -10%;
  right: -10%;
  bottom: -30%;
  height: 70%;
  background: radial-gradient(circle at 50% 100%, rgba(200, 16, 46, 0.2), transparent 68%);
  pointer-events: none;
}
.page-about .about-cta__label {
  margin: 0 0 12px;
  font-family: var(--font-data);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-gold);
  position: relative;
}
.page-about .about-cta__text {
  max-width: 720px;
  margin: 0 auto;
  font-family: var(--font-serif);
  font-size: clamp(1.3rem, 3vw, 2rem);
  line-height: 1.5;
  position: relative;
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 28px;
  position: relative;
}

/* ---------- 桌面端增强 ---------- */
@media (min-width: 760px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.5fr 0.9fr;
    gap: 40px;
  }
  .page-about .about-stats__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
  }
  .page-about .about-quotes__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  .page-about .about-arch {
    grid-template-columns: 0.95fr 1.05fr;
    gap: 56px;
    align-items: center;
  }
  .page-about .about-timeline::before {
    left: 22px;
  }
  .page-about .about-timeline__item {
    padding-left: 68px;
  }
  .page-about .about-timeline__item::before {
    left: 14px;
  }
}

@media (min-width: 960px) {
  .page-about .about-brand__grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 60px;
  }
  .page-about .about-brand__figure img {
    aspect-ratio: 3 / 2;
  }
  .page-about .about-team__grid {
    grid-template-columns: 0.8fr 1.2fr;
    gap: 60px;
    align-items: center;
  }
  .page-about .about-team__figure img {
    aspect-ratio: 3 / 2;
  }
  .page-about .about-arch__steps {
    gap: 20px;
  }
  .page-about .about-arch__step {
    padding: 26px 24px;
  }
}
</PAGE_CSS>