.page-about {
  --about-rule: rgba(212, 175, 55, 0.32);
  --about-rule-soft: rgba(212, 175, 55, 0.14);
  overflow-x: clip;
}

.page-about__inner {
  display: flex;
  flex-direction: column;
  gap: clamp(56px, 8vw, 104px);
  padding-block: 18px 84px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  display: grid;
  gap: 28px;
  align-items: center;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  right: 0;
  bottom: 12%;
  width: min(56%, 460px);
  height: 64%;
  background: linear-gradient(135deg, rgba(123, 77, 255, 0.26), rgba(18, 224, 192, 0.14) 58%, transparent);
  clip-path: polygon(2% 14%, 100% 0, 92% 100%, 10% 86%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__copy {
  position: relative;
  z-index: 1;
}

.page-about .about-hero h1 {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(28px, 5.2vw, 50px);
  line-height: 1.24;
  letter-spacing: 0.01em;
  margin: 10px 0 20px;
  max-width: 17em;
  background: linear-gradient(100deg, var(--gold-hi) 4%, var(--gold) 46%, var(--gold-hi) 96%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: none;
}

.page-about .about-lead {
  max-width: 34em;
  line-height: 1.85;
  color: rgba(242, 239, 230, 0.86);
  margin: 0 0 14px;
  font-size: 16px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-hero__media {
  position: relative;
  z-index: 1;
  margin: 0;
}

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

/* ---------- 关键数字带 ---------- */
.page-about .about-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: var(--about-rule);
  border: 2px solid var(--about-rule);
  box-shadow: var(--sx) var(--sy) 0 rgba(18, 224, 192, 0.18);
}

.page-about .about-stats li {
  background: var(--table);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-stats b {
  font-family: var(--mono);
  font-weight: 700;
  font-size: clamp(20px, 3.4vw, 28px);
  line-height: 1.1;
  color: var(--gold-hi);
  border-bottom: 1px solid var(--cyan);
  align-self: flex-start;
  padding-bottom: 2px;
}

.page-about .about-stats span {
  font-size: 13px;
  color: var(--fog);
  letter-spacing: 0.04em;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  display: grid;
  gap: 28px;
}

.page-about .about-years .toc__title {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--gold);
  margin: 0 0 10px;
  text-transform: uppercase;
}

.page-about .about-years__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-years__list li {
  flex: 0 0 auto;
}

.page-about .about-years__list a {
  display: block;
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--fog);
  text-decoration: none;
  padding: 8px 14px;
  border: 2px solid var(--about-rule);
  transition: color 0.2s ease, border-color 0.2s ease;
}

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

.page-about .about-years__list a[aria-current="true"] {
  color: var(--ink);
  background: var(--gold);
  border-color: var(--gold);
}

.page-about .about-track {
  position: relative;
  padding-left: 30px;
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: -21px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--violet) 34%, var(--cyan) 74%, rgba(18, 224, 192, 0) 100%);
}

.page-about .about-track__title {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(20px, 3vw, 28px);
  line-height: 1.4;
  color: var(--paper);
  margin: 0 0 clamp(26px, 4vw, 40px);
  max-width: 20em;
}

.page-about .about-node {
  position: relative;
  padding-bottom: clamp(30px, 5vw, 46px);
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink);
  border: 3px solid var(--gold);
  box-shadow: 0 0 0 4px var(--about-rule-soft);
}

.page-about .about-node--current::before {
  border-color: var(--cyan);
  box-shadow: 0 0 14px rgba(18, 224, 192, 0.7);
}

.page-about .about-node__year {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--gold);
  margin: 0 0 8px;
}

.page-about .about-node__title {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(19px, 2.4vw, 24px);
  line-height: 1.44;
  color: var(--paper);
  margin: 0 0 10px;
}

.page-about .about-node__text {
  margin: 0;
  max-width: 38em;
  line-height: 1.85;
  color: rgba(242, 239, 230, 0.78);
  font-size: 15.5px;
}

.page-about .about-track__media {
  margin: 0 0 clamp(30px, 5vw, 46px);
}

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

/* ---------- 板块标题组 ---------- */
.page-about .about-head {
  max-width: 44em;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-head__title {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(21px, 3.2vw, 32px);
  line-height: 1.42;
  color: var(--paper);
  margin: 0 0 14px;
  max-width: 20em;
}

.page-about .about-head__lead {
  margin: 0;
  max-width: 36em;
  line-height: 1.85;
  color: rgba(242, 239, 230, 0.78);
  font-size: 15.5px;
}

/* ---------- 能力条 ---------- */
.page-about .about-bars {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.page-about .about-bar {
  background: var(--table);
  border: var(--edge) solid var(--layer);
  box-shadow: var(--sx) var(--sy) 0 rgba(11, 31, 26, 0.9);
  padding: 18px 18px 20px;
}

.page-about .about-bar__top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-bottom: 14px;
}

.page-about .about-bar__name {
  font-family: var(--serif);
  font-weight: 900;
  font-size: 19px;
  color: var(--paper);
  margin: 0;
}

.page-about .about-bar__rail {
  height: 14px;
  background: var(--layer);
  border: 2px solid var(--about-rule);
  position: relative;
  overflow: hidden;
}

.page-about .about-bar__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
  box-shadow: 0 0 12px rgba(18, 224, 192, 0.35);
}

.page-about .about-bar__fill--nav { width: 100%; }
.page-about .about-bar__fill--sr { width: 58.3%; }
.page-about .about-bar__fill--rp { width: 41.7%; }
.page-about .about-bar__fill--ver { width: 25%; }

.page-about .about-bar__note {
  margin: 14px 0 0;
  max-width: 46em;
  line-height: 1.8;
  font-size: 15px;
  color: rgba(242, 239, 230, 0.76);
}

/* ---------- 常见疑问 ---------- */
.page-about .about-questions__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-questions__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  background: var(--table);
  border-left: 4px solid var(--gold);
  padding: 18px 18px 20px;
}

.page-about .about-questions__item:nth-child(even) {
  border-left-color: var(--cyan);
}

.page-about .about-questions__item .num {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 15px;
  color: var(--gold-hi);
  letter-spacing: 0.08em;
  padding-top: 3px;
}

.page-about .about-questions__body h3 {
  font-family: var(--serif);
  font-weight: 900;
  font-size: 18px;
  line-height: 1.5;
  color: var(--paper);
  margin: 0 0 8px;
}

.page-about .about-questions__body p {
  margin: 0;
  max-width: 38em;
  line-height: 1.82;
  font-size: 15px;
  color: rgba(242, 239, 230, 0.76);
}

/* ---------- 三条线 ---------- */
.page-about .about-editorial__grid {
  display: grid;
  gap: 26px;
}

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

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

.page-about .about-lines {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
  counter-reset: about-line;
}

.page-about .about-line {
  background: var(--table);
  border: var(--edge) solid var(--layer);
  border-top: 4px solid var(--gold);
  padding: 18px 18px 20px;
}

.page-about .about-line h3 {
  font-family: var(--serif);
  font-weight: 900;
  font-size: 18px;
  line-height: 1.5;
  color: var(--paper);
  margin: 12px 0 8px;
}

.page-about .about-line p {
  margin: 0;
  max-width: 34em;
  line-height: 1.82;
  font-size: 15px;
  color: rgba(242, 239, 230, 0.76);
}

/* ---------- 跨端使用 ---------- */
.page-about .about-sync__panel {
  border-left: 6px solid var(--cyan);
  box-shadow: var(--sx) var(--sy) 0 rgba(18, 224, 192, 0.22);
  background: linear-gradient(160deg, rgba(123, 77, 255, 0.14), rgba(18, 224, 192, 0.06) 62%, transparent);
}

.page-about .about-sync__title {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(20px, 3vw, 28px);
  line-height: 1.42;
  color: var(--paper);
  margin: 0 0 14px;
  max-width: 20em;
}

.page-about .about-sync__text {
  margin: 0 0 22px;
  max-width: 40em;
  line-height: 1.85;
  font-size: 15.5px;
  color: rgba(242, 239, 230, 0.8);
}

.page-about .about-sync__list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-sync__list li {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  border-bottom: 1px dashed var(--about-rule);
  padding-bottom: 10px;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(242, 239, 230, 0.82);
}

.page-about .about-sync__list .num {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  border-bottom: 2px solid var(--cyan);
  text-align: center;
}

/* ---------- 服务节奏 ---------- */
.page-about .about-support__grid {
  display: grid;
  gap: 16px;
}

.page-about .about-support__cell {
  background: var(--table);
  border: 2px solid var(--layer);
  padding: 20px 18px 22px;
  position: relative;
}

.page-about .about-support__cell .num {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 22px;
  color: transparent;
  -webkit-text-stroke: 1px var(--gold);
  display: block;
  margin-bottom: 10px;
  letter-spacing: 0.06em;
}

.page-about .about-support__cell h3 {
  font-family: var(--serif);
  font-weight: 900;
  font-size: 18px;
  line-height: 1.5;
  color: var(--paper);
  margin: 0 0 8px;
}

.page-about .about-support__cell p {
  margin: 0;
  max-width: 32em;
  line-height: 1.82;
  font-size: 15px;
  color: rgba(242, 239, 230, 0.76);
}

.page-about .about-support__contact {
  margin: clamp(24px, 4vw, 34px) 0 0;
  max-width: 44em;
  line-height: 1.9;
  font-size: 15px;
  color: rgba(242, 239, 230, 0.8);
  border-top: 1px solid var(--about-rule);
  padding-top: 20px;
}

.page-about .about-support__contact a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(18, 224, 192, 0.5);
}

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

.page-about .about-support__more {
  display: inline-block;
  margin-left: 6px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.08em;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.9fr);
    gap: 44px;
  }

  .page-about .about-hero__media {
    margin-top: 12px;
  }

  .page-about .about-editorial__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.25fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-line:nth-child(2) {
    margin-left: 24px;
  }

  .page-about .about-line:nth-child(3) {
    margin-left: 48px;
  }
}

@media (min-width: 940px) {
  .page-about .about-timeline {
    grid-template-columns: 172px minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-years {
    position: sticky;
    top: 96px;
  }

  .page-about .about-years__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-years__list a {
    border: none;
    border-left: 3px solid var(--about-rule);
    padding: 12px 0 12px 16px;
    background: transparent;
  }

  .page-about .about-years__list a[aria-current="true"] {
    color: var(--gold-hi);
    background: transparent;
    border-left-color: var(--cyan);
    text-shadow: 0 0 12px rgba(18, 224, 192, 0.4);
  }

  .page-about .about-bars {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 26px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-stats {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-years__list a,
  .page-about .about-bar__fill {
    transition: none;
  }
}
</main>