.page-about {
  --about-gold-soft: rgba(212, 175, 55, 0.12);
  --about-green-soft: rgba(0, 179, 134, 0.07);
  color: var(--c-text);
  font-family: var(--t-sans);
  line-height: 1.75;
  overflow-x: clip;
  background:
    radial-gradient(circle at 12% 10%, var(--about-gold-soft), transparent 26%),
    radial-gradient(circle at 85% 24%, var(--about-green-soft), transparent 32%),
    radial-gradient(circle at 6% 74%, var(--about-green-soft), transparent 24%),
    var(--c-bg);
}

/* ===== 页面上下文与面包屑 ===== */
.about-context {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.25rem 1.25rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.about-breadcrumb {
  display: flex;
  align-items: center;
  font-size: .85rem;
}
.about-breadcrumb a {
  color: var(--c-text-2);
  text-decoration: none;
  transition: color .2s var(--ease);
}
.about-breadcrumb a:hover {
  color: var(--c-gold);
}
.about-breadcrumb-sep {
  margin: 0 .45rem;
  color: var(--c-border);
}
.about-context-tagline {
  font-size: .8rem;
  letter-spacing: .08em;
  color: var(--c-text-2);
  white-space: nowrap;
}

/* ===== 品牌故事 ===== */
.about-story {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.25rem 3.25rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.75rem;
  position: relative;
}
.about-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-primary-deep);
  border: 1px solid rgba(0, 179, 134, .25);
  background: rgba(0, 179, 134, .05);
  padding: .35rem .9rem;
  border-radius: 999px;
  margin: 0 0 1.15rem;
  line-height: 1.4;
}
.about-eyebrow span {
  color: var(--c-deep);
}
.about-h1 {
  font-size: clamp(1.9rem, 5.2vw, 3.1rem);
  font-weight: 900;
  letter-spacing: -.025em;
  line-height: 1.12;
  color: var(--c-deep);
  margin: 0 0 1.2rem;
}
.about-story-lead {
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.68;
  color: var(--c-deep);
  border-left: 4px solid var(--c-gold);
  padding: .15rem 0 .15rem 1rem;
  margin: 0 0 1.05rem;
}
.about-story-body {
  color: var(--c-text-2);
  margin: 0 0 1.7rem;
  max-width: 58ch;
  font-size: .96rem;
}
.about-story-cta {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
}
.about-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: .6rem 1.4rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: .94rem;
  text-decoration: none;
  transition: all .22s var(--ease);
}
.about-btn-solid {
  background: var(--c-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.about-btn-solid:hover {
  background: var(--c-primary-deep);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.about-btn-ghost {
  border: 1.5px solid var(--c-primary);
  color: var(--c-primary-deep);
}
.about-btn-ghost:hover {
  background: var(--c-primary);
  color: #fff;
  border-color: var(--c-primary);
}

/* 品牌故事视觉 */
.about-story-visual {
  position: relative;
}
.about-story-visual::before {
  content: "";
  position: absolute;
  left: -10px;
  bottom: 14px;
  width: 70px;
  height: 70px;
  border-left: 3px solid var(--c-gold);
  border-bottom: 3px solid var(--c-gold);
  border-radius: 0 0 0 18px;
  opacity: .5;
  pointer-events: none;
}
.about-story-figure {
  margin: 0;
}
.about-story-figure img {
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 24px;
  box-shadow: var(--shadow-md);
  display: block;
}
.about-story-float {
  position: absolute;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  padding: .75rem .95rem;
}
.about-story-float-main {
  bottom: -1rem;
  left: .75rem;
  display: grid;
  grid-template-columns: auto auto;
  align-items: baseline;
  gap: .25rem .4rem;
}
.about-story-float-main .about-float-desc {
  grid-column: 1 / -1;
}
.about-story-float-sub {
  top: .75rem;
  right: .75rem;
  display: grid;
  gap: .15rem;
  justify-items: start;
}
.about-story-float-main:hover {
  animation: about-shake .45s var(--ease);
}
@keyframes about-shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-3px) rotate(-1deg); }
  50% { transform: translateX(3px) rotate(1deg); }
  75% { transform: translateX(-2px); }
}
.about-float-num {
  font-family: var(--t-mono);
  font-weight: 800;
  font-size: 1.9rem;
  line-height: 1;
  color: var(--c-primary);
}
.about-float-unit {
  font-family: var(--t-mono);
  font-weight: 800;
  font-size: .9rem;
  color: var(--c-deep);
}
.about-float-desc {
  font-size: .76rem;
  line-height: 1.45;
  color: var(--c-text-2);
}
.about-story-float-sub .about-float-num {
  color: var(--c-gold);
  font-size: 1.5rem;
}

/* ===== 品牌历程 ===== */
.about-milestones {
  background: var(--c-surface);
  padding: 3rem 1.25rem;
}
.about-milestones-head {
  max-width: var(--max-width);
  margin: 0 auto 2.25rem;
}
.about-h2 {
  font-size: clamp(1.5rem, 4vw, 2.3rem);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.18;
  color: var(--c-deep);
  margin: 0 0 .85rem;
}
.about-milestones-desc {
  color: var(--c-text-2);
  max-width: 60ch;
  margin: 0;
  font-size: .96rem;
}
.about-milestones-layout {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 1rem;
  align-items: start;
}
.about-timeline-col {
  min-width: 0;
  display: flex;
  justify-content: center;
}
.about-timeline-svg {
  width: 100%;
  height: auto;
  display: block;
  overflow: visible;
}
.about-timeline-tick {
  font-size: 12px;
  font-family: var(--t-mono);
  font-weight: 800;
  fill: var(--c-deep);
  transition: fill .25s;
}
.about-timeline-node circle {
  transition: fill .25s var(--ease), stroke .25s var(--ease), transform .25s var(--ease);
  transform-box: fill-box;
  transform-origin: center;
}
.about-timeline-node:hover circle {
  transform: scale(1.2);
  fill: var(--c-gold);
  stroke: var(--c-gold);
}
.about-timeline-node:hover .about-timeline-tick {
  fill: #fff;
}
.about-timeline-node-last circle {
  fill: var(--c-gold);
  stroke: var(--c-gold);
}
.about-timeline-node-last .about-timeline-tick {
  fill: #fff;
}
.about-timeline-cards {
  display: grid;
  gap: 1.1rem;
  min-width: 0;
}
.about-tl-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-left: 4px solid var(--c-primary);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow .25s var(--ease), transform .25s var(--ease);
}
.about-tl-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.about-tl-card h3 {
  font-size: 1rem;
  font-weight: 900;
  color: var(--c-deep);
  margin: 0;
}
.about-tl-card p {
  color: var(--c-text-2);
  font-size: .9rem;
  margin: .4rem 0 0;
  line-height: 1.65;
}
.about-tl-card-current {
  border-left-color: var(--c-gold);
}

/* ===== 核心产品矩阵 ===== */
.about-matrix {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3.25rem 1.25rem;
}
.about-matrix-head {
  max-width: 720px;
  margin-bottom: 2.25rem;
}
.about-matrix-lead {
  color: var(--c-text-2);
  font-size: .96rem;
}
.about-matrix-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}
.about-module {
  position: relative;
  overflow: hidden;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: 20px;
  padding: 1.6rem 1.5rem 1.4rem;
  box-shadow: var(--shadow-sm);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.about-module::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-gold));
  opacity: .75;
}
.about-module::after {
  content: "";
  position: absolute;
  right: -36px;
  top: -36px;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--about-gold-soft), transparent 70%);
  pointer-events: none;
}
.about-module:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.about-module-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 28px;
  padding: 0 .55rem;
  font-family: var(--t-mono);
  font-size: .8rem;
  font-weight: 800;
  color: var(--c-gold);
  border: 1.5px solid var(--c-gold);
  border-radius: 999px;
  background: rgba(212, 175, 55, .08);
  margin-bottom: .9rem;
}
.about-module h3 {
  font-size: 1.16rem;
  font-weight: 900;
  color: var(--c-deep);
  margin: 0 0 .5rem;
  line-height: 1.3;
}
.about-module p {
  font-size: .92rem;
  color: var(--c-text-2);
  margin: 0 0 .9rem;
  max-width: 46ch;
}
.about-text-link {
  display: inline-block;
  font-size: .9rem;
  font-weight: 800;
  color: var(--c-primary-deep);
  text-decoration: none;
  border-bottom: 2px solid rgba(0, 179, 134, .22);
  padding-bottom: 1px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.about-text-link:hover {
  color: var(--c-gold);
  border-color: var(--c-gold);
}

/* ===== 技术能力 ===== */
.about-tech {
  margin: 0 1rem 2.5rem;
  padding: 2.5rem 1.25rem;
  background:
    radial-gradient(circle at 88% 8%, rgba(212, 175, 55, .2), transparent 30%),
    linear-gradient(135deg, var(--c-deep), var(--c-deep-2));
  border-radius: 26px;
  color: #C7D0D8;
  display: grid;
  gap: 2.25rem;
  position: relative;
}
.about-tech::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 8%;
  width: 34%;
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, var(--c-gold), transparent);
}
.about-tech-copy {
  min-width: 0;
}
.about-eyebrow-light {
  color: var(--c-gold-light);
  border-color: rgba(212, 175, 55, .4);
  background: rgba(212, 175, 55, .1);
}
.about-tech-h2 {
  color: #fff;
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.16;
  margin: 0 0 .8rem;
}
.about-tech-lead {
  color: #B7C2CB;
  margin: 0 0 1.4rem;
  max-width: 52ch;
  font-size: .96rem;
}
.about-tech-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .8rem;
}
.about-tech-list li {
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: var(--radius);
  padding: .95rem 1.1rem;
  transition: background .22s, border-color .22s;
}
.about-tech-list li:hover {
  background: rgba(255, 255, 255, .08);
  border-color: rgba(212, 175, 55, .35);
}
.about-tech-list strong {
  display: block;
  color: #fff;
  font-weight: 800;
  font-size: .97rem;
  margin-bottom: .2rem;
}
.about-tech-list span {
  font-size: .87rem;
  color: #A8B3BC;
  line-height: 1.6;
}
.about-tech-visuals {
  display: grid;
  gap: .85rem;
}
.about-tech-figure {
  margin: 0;
}
.about-tech-figure img {
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, .12);
  display: block;
  background: #142F42;
}
.about-tech-figure-sub {
  margin-top: .25rem;
}

/* ===== 资质与合规 ===== */
.about-trust {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 1.25rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.6rem;
}
.about-trust-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 128px;
  padding: 1.25rem;
  border: 2px dashed var(--c-gold);
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(212, 175, 55, .09), rgba(0, 179, 134, .04));
  text-align: center;
}
.about-trust-icp {
  font-family: var(--t-mono);
  font-weight: 800;
  font-size: 1rem;
  color: var(--c-deep);
  letter-spacing: .02em;
  line-height: 1.5;
}
.about-trust-content p {
  color: var(--c-text-2);
  max-width: 64ch;
  font-size: .95rem;
  margin: 0 0 1rem;
}
.about-trust-content p:last-child {
  margin-bottom: 0;
}

/* ===== 服务承诺 ===== */
.about-service {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.25rem 3.75rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}
.about-service-seal {
  width: 124px;
  height: 124px;
  border: 3px solid var(--c-gold);
  border-radius: 16px;
  display: grid;
  place-items: center;
  transform: rotate(-6deg);
  box-shadow:
    inset 0 0 0 3px rgba(212, 175, 55, .14),
    inset 0 0 0 8px rgba(212, 175, 55, .05),
    var(--shadow-sm);
  color: var(--c-gold);
  font-weight: 900;
  letter-spacing: .1em;
  text-align: center;
  line-height: 1.5;
  background: rgba(212, 175, 55, .05);
}
.about-seal-text {
  font-size: 1.1rem;
}
.about-service-content h2 {
  margin-top: 0;
}
.about-service-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.1rem;
  margin-top: .25rem;
}
.about-service-item {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: transform .22s var(--ease), box-shadow .22s var(--ease);
}
.about-service-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.about-service-item h3 {
  font-size: .95rem;
  font-weight: 900;
  color: var(--c-deep);
  margin: 0;
}
.about-service-item p {
  margin: .45rem 0 .85rem;
  font-size: .9rem;
  color: var(--c-text-2);
}
.about-service-item .about-text-link {
  font-size: .88rem;
}
.about-service-note {
  margin-top: 1.4rem;
  padding: .9rem 1.1rem;
  background: linear-gradient(90deg, rgba(0, 179, 134, .09), transparent 90%);
  border-left: 4px solid var(--c-primary);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--c-deep);
  font-weight: 700;
  font-size: .93rem;
}
.about-service-membership {
  margin-top: 1.25rem;
}

/* ===== 平板 ===== */
@media (min-width: 768px) {
  .about-story {
    padding: 2.75rem 1.5rem 4rem;
  }
  .about-story-float-main {
    left: -1rem;
  }
  .about-milestones {
    padding: 3.75rem 1.5rem;
  }
  .about-milestones-layout {
    grid-template-columns: 90px 1fr;
    gap: 1.75rem;
  }
  .about-matrix {
    padding: 4rem 1.5rem;
  }
  .about-matrix-list {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
  .about-module-alt {
    margin-top: 2rem;
  }
  .about-tech {
    padding: 3rem 2rem;
  }
  .about-service-grid {
    grid-template-columns: 1fr 1fr;
  }
  .about-service {
    padding: 1.5rem 1.5rem 4.5rem;
  }
  .about-trust {
    grid-template-columns: 240px 1fr;
    align-items: center;
    padding: 4rem 1.5rem;
  }
}

/* ===== 桌面 ===== */
@media (min-width: 1024px) {
  .about-context {
    padding-top: 1.75rem;
  }
  .about-story {
    grid-template-columns: 1.05fr .95fr;
    align-items: center;
    gap: 4rem;
    padding: 3.5rem 1.5rem 5rem;
  }
  .about-milestones {
    padding: 5rem 1.5rem;
  }
  .about-milestones-layout {
    grid-template-columns: 130px 1fr;
    gap: 2.5rem;
  }
  .about-timeline-col {
    justify-content: center;
  }
  .about-matrix {
    padding: 5rem 1.5rem;
  }
  .about-module {
    padding: 1.9rem 1.8rem;
  }
  .about-tech {
    max-width: var(--max-width);
    margin: 0 auto 3.5rem;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 3.25rem;
    padding: 3.75rem 3rem;
  }
  .about-tech-visuals {
    align-self: center;
  }
  .about-tech-figure-sub {
    width: 62%;
    margin-left: auto;
    margin-top: .5rem;
  }
  .about-trust {
    padding: 5rem 1.5rem;
    grid-template-columns: 280px 1fr;
    gap: 3rem;
  }
  .about-service {
    grid-template-columns: 200px 1fr;
    gap: 3rem;
    padding: 2rem 1.5rem 5.5rem;
  }
  .about-service-seal {
    justify-self: start;
  }
}