.page-about {
  --about-gutter: 52px;
  --about-node: 19px;
  --about-line: rgba(212, 160, 23, 0.22);
  --about-plate: #17191d;
  overflow-wrap: break-word;
}

/* ---------- 面包屑与首屏 ---------- */

.page-about .about-top {
  padding-top: 26px;
}

.page-about .about-hero {
  padding-top: 18px;
  padding-bottom: 34px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 26px;
  margin-top: 18px;
}

.page-about .about-hero__lead .page-title {
  font-size: var(--fs-1);
  line-height: 1.04;
  letter-spacing: -0.022em;
  margin: 10px 0 0;
}

.page-about .about-hero__lead .lede {
  margin: 18px 0 0;
  max-width: 66ch;
  line-height: 1.85;
  color: var(--cream);
}

.page-about .about-chain {
  border-left: 2px solid var(--about-line);
  padding-left: 18px;
}

.page-about .about-chain__label {
  font-size: var(--fs-6);
  letter-spacing: 0.24em;
  color: var(--steel);
  margin: 0 0 10px;
}

.page-about .chain {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-about .chain a {
  color: var(--cream);
  text-decoration: none;
  font-size: 0.95rem;
  border-bottom: 1px solid rgba(212, 160, 23, 0.28);
  padding-bottom: 2px;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .chain a:hover,
.page-about .chain a:focus-visible {
  color: var(--gold-hi);
  border-color: var(--gold);
}

.page-about .about-hero__fig {
  margin: 30px 0 0;
}

.page-about .about-hero__fig .media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--glass-line-strong);
  background: var(--ink-2);
}

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

.page-about figcaption {
  margin-top: 10px;
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--steel);
  max-width: 62ch;
}

/* ---------- 章节标题通用 ---------- */

.page-about .sect-title {
  font-family: var(--font-display);
  font-size: var(--fs-2);
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 8px 0 0;
  color: var(--cream);
}

.page-about .sect-kicker {
  color: var(--gold);
}

/* ---------- 滚动节奏条 ---------- */

.page-about .about-stages {
  padding: 40px 0 12px;
}

.page-about .about-pulse {
  display: flex;
  align-items: center;
  gap: 14px;
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
  padding: 10px 0;
  margin-bottom: 34px;
}

.page-about .about-pulse__label {
  flex: 0 0 auto;
  font-size: var(--fs-6);
  letter-spacing: 0.22em;
  color: var(--gold);
  text-transform: uppercase;
  border-right: 1px solid var(--about-line);
  padding-right: 14px;
}

.page-about .about-pulse__vp {
  flex: 1 1 auto;
  overflow: hidden;
  min-width: 0;
}

.page-about .about-pulse__track {
  display: flex;
  width: max-content;
  animation: about-scroll 48s linear infinite;
}

.page-about .about-pulse__item {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--steel);
  white-space: nowrap;
  margin-right: 52px;
}

@keyframes about-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.page-about .about-stages__lede {
  margin: 16px 0 0;
  max-width: 64ch;
  line-height: 1.85;
  color: var(--steel);
}

/* ---------- 时间线 ---------- */

.page-about .stage-track {
  position: relative;
  margin-top: 34px;
}

.page-about .stage-track::before {
  content: "";
  position: absolute;
  left: var(--about-node);
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: linear-gradient(
    180deg,
    rgba(212, 160, 23, 0) 0%,
    rgba(212, 160, 23, 0.5) 6%,
    rgba(212, 160, 23, 0.75) 50%,
    rgba(212, 160, 23, 0.5) 94%,
    rgba(212, 160, 23, 0) 100%
  );
}

.page-about .stage {
  position: relative;
  display: grid;
  gap: 18px;
  padding: 22px 0 30px var(--about-gutter);
}

.page-about .stage::before {
  content: "";
  position: absolute;
  left: var(--about-node);
  top: 32px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  transform: translateX(-50%);
  background: radial-gradient(circle at 34% 30%, var(--gold-hi), var(--gold) 55%, var(--gold-deep));
  box-shadow: 0 0 0 4px rgba(212, 160, 23, 0.12), 0 0 20px rgba(212, 160, 23, 0.35);
}

.page-about .stage__plate {
  position: relative;
  align-self: start;
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-line);
  background:
    linear-gradient(150deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0) 60%),
    var(--about-plate);
  transition: border-color 0.35s var(--ease), transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.page-about .stage__plate:hover,
.page-about .stage__plate:focus-within {
  border-color: rgba(212, 160, 23, 0.72);
  transform: translateX(4px);
  box-shadow: var(--shadow-lift);
}

.page-about .stage__num {
  display: block;
  font-size: var(--fs-6);
  letter-spacing: 0.22em;
  color: var(--gold);
}

.page-about .stage__name {
  font-family: var(--font-display);
  font-size: var(--fs-4);
  line-height: 1.4;
  margin: 8px 0 12px;
  color: var(--cream);
}

.page-about .stage__keys {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  opacity: 0.72;
  transition: opacity 0.35s var(--ease);
}

.page-about .stage__plate:hover .stage__keys {
  opacity: 1;
}

.page-about .stage__vtext {
  display: none;
}

.page-about .stage__body p {
  margin: 0 0 14px;
  line-height: 1.85;
  max-width: 64ch;
}

.page-about .stage__body p:last-child {
  margin-bottom: 0;
}

.page-about .stage__aside {
  align-self: start;
}

/* ---------- 时间线中段分隔图 ---------- */

.page-about .about-divider {
  padding-left: var(--about-gutter);
  margin: 6px 0 14px;
}

.page-about .about-divider .media {
  aspect-ratio: 2 / 1;
  overflow: hidden;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-line);
  background: var(--ink-2);
}

/* ---------- 编辑部区块 ---------- */

.page-about .about-desk {
  padding: 54px 0 56px;
  margin-top: 36px;
}

.page-about .about-desk__grid {
  display: grid;
  gap: 30px;
  margin-top: 30px;
}

.page-about .about-desk__text p {
  margin: 0 0 18px;
  line-height: 1.85;
  max-width: 62ch;
}

.page-about .role-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .role-list li {
  padding-left: 16px;
  border-left: 2px solid rgba(212, 160, 23, 0.5);
}

.page-about .role-list b {
  display: block;
  font-family: var(--font-display);
  font-size: 1.02rem;
  color: var(--gold-hi);
  margin-bottom: 4px;
}

.page-about .role-list span {
  display: block;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--cream);
}

.page-about .about-desk__side {
  display: grid;
  gap: 22px;
  align-content: start;
}

.page-about .about-desk__fig {
  margin: 0;
}

.page-about .about-desk__fig .media {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--glass-line-strong);
  background: var(--ink-2);
}

.page-about .about-desk__annot {
  border-left: 2px solid rgba(212, 160, 23, 0.4);
  padding-left: 16px;
}

/* ---------- 三审流程条 ---------- */

.page-about .review-path {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-about .review-step {
  position: relative;
  padding-top: 18px;
  border-top: 2px solid rgba(212, 160, 23, 0.42);
}

.page-about .review-step::after {
  content: "";
  position: absolute;
  top: -6px;
  left: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gold);
}

.page-about .review-step__num {
  display: inline-block;
  font-size: var(--fs-6);
  letter-spacing: 0.24em;
  color: var(--gold-hi);
}

.page-about .review-step h3 {
  font-family: var(--font-display);
  font-size: var(--fs-4);
  margin: 8px 0 8px;
  color: var(--cream);
}

.page-about .review-step p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--cream);
}

/* ---------- 帮助体系 ---------- */

.page-about .about-help {
  padding: 54px 0 56px;
}

.page-about .about-help__lede {
  margin: 16px 0 0;
  max-width: 62ch;
  line-height: 1.85;
  color: var(--cream);
}

.page-about .help-track {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  position: relative;
}

.page-about .help-node {
  position: relative;
  padding: 26px 0 22px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.page-about .help-node:first-child {
  border-top-color: rgba(212, 160, 23, 0.5);
}

.page-about .help-node__idx {
  display: block;
  font-size: var(--fs-6);
  letter-spacing: 0.24em;
  color: var(--gold-hi);
  margin-bottom: 8px;
}

.page-about .help-node h3 {
  font-family: var(--font-display);
  font-size: var(--fs-4);
  margin: 0 0 8px;
  color: var(--cream);
}

.page-about .help-node p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: rgba(242, 237, 228, 0.86);
}

.page-about .about-help__more {
  margin: 26px 0 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: rgba(242, 237, 228, 0.82);
  max-width: 64ch;
}

.page-about .about-help__more a {
  color: var(--gold-hi);
  text-decoration: none;
  border-bottom: 1px solid rgba(245, 215, 110, 0.5);
}

/* ---------- 厂商专区 ---------- */

.page-about .about-vendor {
  padding: 54px 0 30px;
}

.page-about .about-vendor__grid {
  display: grid;
  gap: 26px;
  margin-top: 30px;
}

.page-about .vendor-primary h3,
.page-about .vendor-secondary h3 {
  font-family: var(--font-display);
  font-size: var(--fs-3);
  margin: 0 0 12px;
  color: var(--cream);
}

.page-about .vendor-primary p,
.page-about .vendor-secondary p {
  margin: 0;
  line-height: 1.85;
  max-width: 56ch;
}

.page-about .vendor-primary {
  padding: 24px 24px 26px;
  border-radius: var(--radius);
  border: 1px solid var(--glass-line);
  background:
    linear-gradient(160deg, rgba(212, 160, 23, 0.1), rgba(212, 160, 23, 0) 62%),
    var(--ink-2);
}

.page-about .vendor-secondary {
  padding: 24px 6px 26px 24px;
  border-left: 2px solid rgba(212, 160, 23, 0.5);
}

.page-about .vendor-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
}

.page-about .vendor-tags li {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--gold-hi);
  border: 1px solid rgba(212, 160, 23, 0.42);
  border-radius: 999px;
  padding: 4px 12px;
}

.page-about .vendor-steps {
  margin: 18px 0 0;
  padding-left: 20px;
  display: grid;
  gap: 8px;
}

.page-about .vendor-steps li {
  font-size: 0.94rem;
  line-height: 1.75;
  color: rgba(242, 237, 228, 0.88);
}

.page-about .about-vendor__stats {
  display: grid;
  gap: 20px;
  margin-top: 36px;
  padding-top: 26px;
  border-top: 1px solid var(--about-line);
}

.page-about .about-vendor__stats .stat {
  display: grid;
  gap: 4px;
}

.page-about .about-vendor__stats .stat__num {
  font-size: var(--fs-2);
  line-height: 1;
  color: var(--gold-hi);
  letter-spacing: 0.04em;
}

.page-about .about-vendor__stats .stat__label {
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--steel);
}

/* ---------- 备案与审读 ---------- */

.page-about .about-compliance {
  padding: 52px 0 56px;
  margin-top: 34px;
}

.page-about .about-compliance__grid {
  display: grid;
  gap: 28px;
  margin-top: 28px;
}

.page-about .compliance-plate {
  align-self: start;
  display: grid;
  gap: 8px;
  padding: 22px 22px 24px;
  border-radius: var(--radius);
  border: 1px solid rgba(212, 160, 23, 0.35);
  background:
    linear-gradient(165deg, rgba(212, 160, 23, 0.14), rgba(212, 160, 23, 0) 70%),
    var(--ink);
}

.page-about .compliance-plate__label {
  font-size: var(--fs-6);
  letter-spacing: 0.26em;
  color: var(--steel);
}

.page-about .compliance-plate__value {
  font-size: clamp(1.05rem, 2.6vw, 1.35rem);
  letter-spacing: 0.12em;
  color: var(--gold-hi);
  word-break: break-all;
}

.page-about .compliance-plate__hint {
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--steel);
}

.page-about .compliance-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .compliance-list li {
  padding-left: 16px;
  border-left: 2px solid rgba(255, 255, 255, 0.16);
}

.page-about .compliance-list b {
  display: block;
  font-family: var(--font-display);
  color: var(--cream);
  margin-bottom: 4px;
}

.page-about .compliance-list span {
  display: block;
  font-size: 0.94rem;
  line-height: 1.8;
  color: rgba(242, 237, 228, 0.82);
}

.page-about .compliance-more {
  margin: 26px 0 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: rgba(242, 237, 228, 0.82);
  max-width: 62ch;
}

.page-about .compliance-more a {
  color: var(--gold-hi);
  text-decoration: none;
  border-bottom: 1px solid rgba(245, 215, 110, 0.5);
}

/* ---------- 后续去向 ---------- */

.page-about .about-next {
  padding-top: 46px;
  padding-bottom: 56px;
}

.page-about .next-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .next-list li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 4px 14px;
  align-items: baseline;
  padding: 16px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.page-about .next-list__num {
  grid-row: span 2;
  font-size: var(--fs-6);
  letter-spacing: 0.2em;
  color: var(--gold);
}

.page-about .next-list a {
  font-family: var(--font-display);
  font-size: var(--fs-4);
  color: var(--cream);
  text-decoration: none;
  border-bottom: 1px solid rgba(212, 160, 23, 0.4);
  justify-self: start;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .next-list a:hover,
.page-about .next-list a:focus-visible {
  color: var(--gold-hi);
  border-color: var(--gold);
}

.page-about .next-list span:last-child {
  grid-column: 2;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--steel);
}

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-about .role-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 26px;
  }

  .page-about .about-vendor__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .next-list li {
    grid-template-columns: 52px 200px minmax(0, 1fr);
    gap: 4px 18px;
    align-items: center;
  }

  .page-about .next-list__num {
    grid-row: auto;
  }

  .page-about .next-list span:last-child {
    grid-column: 3;
  }
}

@media (min-width: 780px) {
  .page-about .review-path {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 30px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 48px;
    align-items: end;
  }

  .page-about .about-desk__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 46px;
  }

  .page-about .stage {
    grid-template-columns: 204px minmax(0, 1fr);
    gap: 40px;
    padding: 30px 0 38px var(--about-gutter);
  }

  .page-about .stage__aside {
    grid-column: 2;
    margin-top: 4px;
  }

  .page-about .stage__vtext {
    display: block;
    position: absolute;
    right: -30px;
    top: 50%;
    transform: translateY(-50%);
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.34em;
    color: rgba(212, 160, 23, 0.72);
    white-space: nowrap;
    pointer-events: none;
  }

  .page-about .help-track {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .help-track::before {
    content: "";
    position: absolute;
    top: 7px;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(
      90deg,
      rgba(212, 160, 23, 0) 0%,
      rgba(212, 160, 23, 0.62) 12%,
      rgba(212, 160, 23, 0.62) 88%,
      rgba(212, 160, 23, 0) 100%
    );
  }

  .page-about .help-node {
    border-top: 0;
    padding: 38px 30px 0 0;
  }

  .page-about .help-node::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: var(--ink);
    border: 2px solid var(--gold);
    box-shadow: 0 0 14px rgba(212, 160, 23, 0.5);
  }

  .page-about .help-node__idx {
    position: absolute;
    top: 24px;
    left: 0;
  }

  .page-about .about-help .help-node h3 {
    margin-top: 30px;
  }

  .page-about .about-vendor__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: 34px;
  }

  .page-about .about-compliance__grid {
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    gap: 44px;
  }
}

@media (min-width: 1180px) {
  .page-about .stage {
    grid-template-columns: 196px minmax(0, 1fr) 198px;
  }

  .page-about .stage__plate,
  .page-about .stage__body,
  .page-about .stage__aside {
    grid-row: 1;
  }

  .page-about .stage__plate { grid-column: 1; }
  .page-about .stage__body { grid-column: 2; }
  .page-about .stage__aside { grid-column: 3; margin-top: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-pulse__track {
    animation: none;
  }

  .page-about .stage__plate {
    transition: none;
  }

  .page-about .stage__plate:hover,
  .page-about .stage__plate:focus-within {
    transform: none;
  }
}