.page-about {
  --about-pad: clamp(26px, 5vw, 56px);
  --about-tick: 11px;
  background: var(--wk-mist);
  color: var(--wk-ink);
  font-family: var(--wk-font-display);
  overflow-x: clip;
}

/* ── 首屏 ───────────────────────────────── */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  background: linear-gradient(155deg, var(--wk-night) 0%, var(--wk-ink) 46%, var(--wk-ink-2) 100%);
  color: var(--wk-mist);
  padding: clamp(36px, 6vw, 76px) 0 clamp(48px, 8vw, 104px);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto -12% -46% 26%;
  height: 76%;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(58% 100% at 32% 100%, rgba(242, 183, 5, 0.24), transparent 72%),
    radial-gradient(70% 120% at 90% 10%, rgba(31, 58, 95, 0.9), transparent 70%),
    linear-gradient(118deg, transparent 0%, rgba(242, 183, 5, 0.09) 58%, transparent 100%);
}

.page-about .about-hero .wk-crumbs {
  color: var(--wk-slate);
  font-size: 12.5px;
  letter-spacing: 0.06em;
}

.page-about .about-hero .wk-crumbs a {
  color: var(--wk-slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s var(--wk-ease), color 0.25s var(--wk-ease);
}

.page-about .about-hero .wk-crumbs a:hover {
  color: var(--wk-gold);
  border-bottom-color: var(--wk-line);
}

.page-about .about-hero__head {
  margin-top: clamp(28px, 5vw, 56px);
}

.page-about .about-hero .wk-title {
  margin: 14px 0 0;
  max-width: 17ch;
  font-size: clamp(36px, 7.2vw, 82px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--wk-paper);
}

.page-about .about-hero .wk-lede {
  margin-top: clamp(16px, 2.4vw, 26px);
  max-width: 60ch;
  color: rgba(245, 246, 248, 0.76);
  font-size: 16px;
  line-height: 1.85;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(16px, 4vw, 36px);
  margin-top: clamp(32px, 5vw, 60px);
  padding-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid rgba(201, 148, 0, 0.38);
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.page-about .about-hero__stat:last-child {
  grid-column: 1 / -1;
}

.page-about .about-hero__num {
  font-family: var(--wk-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 6.4vw, 42px);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--wk-gold);
}

.page-about .about-hero__unit {
  margin-left: 4px;
  font-size: 13px;
  letter-spacing: 0;
  color: rgba(245, 246, 248, 0.6);
}

.page-about .about-hero__label {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--wk-slate);
}

/* ── 正文轨道 ───────────────────────────── */
.page-about .about-body {
  padding: clamp(44px, 7vw, 104px) 0 clamp(52px, 8vw, 112px);
}

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

.page-about .about-step {
  position: relative;
  padding: clamp(30px, 4.6vw, 58px) 0 clamp(30px, 4.6vw, 58px) var(--about-pad);
  border-top: 1px solid var(--wk-line-soft);
}

.page-about .about-step:first-child {
  border-top-color: var(--wk-line);
}

.page-about .about-step::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--wk-line) 0%, var(--wk-line) 58%, rgba(201, 148, 0, 0.08) 100%);
}

.page-about .about-step:first-child::before {
  top: 10px;
}

.page-about .about-step:last-child::before {
  background: linear-gradient(to bottom, var(--wk-line) 0%, rgba(201, 148, 0, 0) 92%);
}

.page-about .about-step__inner {
  position: relative;
  min-width: 0;
}

.page-about .about-step__tick {
  position: absolute;
  left: calc(4px - var(--about-pad));
  top: 3px;
  width: var(--about-tick);
  height: var(--about-tick);
  border-radius: 50%;
  border: 1px solid var(--wk-line);
  background: var(--wk-mist);
  transition: background-color 0.35s var(--wk-ease), border-color 0.35s var(--wk-ease), box-shadow 0.35s var(--wk-ease);
}

.page-about .about-step.is-in .about-step__tick {
  background: var(--wk-gold);
  border-color: var(--wk-gold);
  box-shadow: 0 0 0 4px rgba(242, 183, 5, 0.16);
}

.page-about .about-step__title {
  margin: 10px 0 0;
  max-width: 26ch;
  font-size: clamp(22px, 3.6vw, 36px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--wk-ink);
}

.page-about .about-step__prose {
  margin-top: clamp(14px, 2vw, 22px);
  max-width: 62ch;
}

.page-about .about-step__prose p {
  margin: 0 0 1.05em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--wk-ink-2);
}

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

.page-about .about-step--plain .about-step__title {
  color: var(--wk-ink);
}

/* ── 图片 ───────────────────────────────── */
.page-about .about-figure {
  margin: clamp(22px, 3.4vw, 38px) 0 0;
}

.page-about .about-figure--side {
  max-width: 320px;
  margin-top: 4px;
}

.page-about .about-figure--banner {
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-about .about-figure--half {
  max-width: 560px;
}

.page-about .about-figure .wk-media {
  border: 1px solid var(--wk-line-soft);
  background: var(--wk-ink-2);
}

.page-about .about-figure .wk-media__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-figure__caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--wk-slate);
}

/* ── 来源行 ─────────────────────────────── */
.page-about .about-source {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding-top: 10px;
  border-top: 1px solid var(--wk-line);
  max-width: 62ch;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--wk-slate);
}

/* ── 字段对照表 ─────────────────────────── */
.page-about .about-table-wrap {
  margin-top: clamp(18px, 2.8vw, 30px);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-table {
  width: 100%;
  min-width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.page-about .about-table caption {
  text-align: left;
  margin-bottom: 12px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--wk-slate);
}

.page-about .about-table th {
  padding: 12px 14px 12px 0;
  border-bottom: 1px solid var(--wk-line);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-align: left;
  color: var(--wk-slate);
  white-space: nowrap;
}

.page-about .about-table td {
  padding: 16px 14px 16px 0;
  border-bottom: 1px solid var(--wk-line-soft);
  vertical-align: top;
  line-height: 1.7;
  color: var(--wk-ink-2);
}

.page-about .about-table tbody tr:last-child td {
  border-bottom-color: var(--wk-line);
}

.page-about .about-table td:first-child {
  font-family: var(--wk-font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--wk-gold-deep);
  white-space: nowrap;
}

.page-about .about-table td:nth-child(2) {
  font-weight: 600;
  color: var(--wk-ink);
}

/* ── 深色流程面板 ───────────────────────── */
.page-about .about-panel {
  margin-top: clamp(24px, 3.6vw, 40px);
  padding: clamp(20px, 3.4vw, 40px);
  border: 1px solid var(--wk-line-soft);
}

.page-about .about-panel--dark {
  border-color: rgba(201, 148, 0, 0.34);
  color: var(--wk-mist);
  background:
    radial-gradient(118% 92% at 0% 0%, rgba(242, 183, 5, 0.15), transparent 62%),
    linear-gradient(160deg, var(--wk-ink-2) 0%, var(--wk-ink) 52%, var(--wk-night) 100%);
}

.page-about .about-panel__eyebrow {
  margin: 0 0 clamp(18px, 2.6vw, 28px);
  font-family: var(--wk-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--wk-gold);
}

.page-about .about-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 28px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-flow__item {
  position: relative;
  padding-top: 16px;
  border-top: 1px solid rgba(201, 148, 0, 0.28);
}

.page-about .about-flow__num {
  font-family: var(--wk-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1;
  color: var(--wk-gold);
  letter-spacing: -0.01em;
}

.page-about .about-flow__title {
  margin: 10px 0 8px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--wk-paper);
}

.page-about .about-flow__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(245, 246, 248, 0.72);
}

.page-about .about-panel__note {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding-top: 12px;
  border-top: 1px solid rgba(201, 148, 0, 0.22);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--wk-slate);
}

/* ── 折叠 ───────────────────────────────── */
.page-about .about-fold {
  margin-top: clamp(20px, 3vw, 30px);
}

/* ── 列表 ───────────────────────────────── */
.page-about .about-list {
  margin: 0;
  padding: 0;
  list-style: none;
  max-width: 62ch;
}

.page-about .about-list li {
  position: relative;
  padding: 12px 0 12px 18px;
  border-bottom: 1px solid var(--wk-line-soft);
  font-size: 15px;
  line-height: 1.8;
  color: var(--wk-ink-2);
}

.page-about .about-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 21px;
  width: 7px;
  height: 1px;
  background: var(--wk-gold-deep);
}

.page-about .about-list--tight li {
  font-size: 15px;
  padding-top: 10px;
  padding-bottom: 10px;
}

/* ── 工具两栏 ───────────────────────────── */
.page-about .about-tools {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(22px, 3.2vw, 34px);
}

.page-about .about-tool {
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--wk-line-soft);
  border-top: 1px solid var(--wk-line);
  background: var(--wk-paper);
  box-shadow: var(--wk-shadow);
}

.page-about .about-tool__title {
  margin: 10px 0 10px;
  font-size: clamp(17px, 2.2vw, 20px);
  line-height: 1.35;
  font-weight: 700;
  color: var(--wk-ink);
}

.page-about .about-tool p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--wk-ink-2);
}

/* ── 收口 ───────────────────────────────── */
.page-about .about-ending {
  margin: clamp(22px, 3vw, 32px) 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--wk-ink-2);
}

.page-about .about-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  margin-top: clamp(40px, 6vw, 72px);
  border-top: 1px solid var(--wk-line);
}

.page-about .about-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--wk-line-soft);
  text-decoration: none;
  color: var(--wk-ink);
  transition: color 0.25s var(--wk-ease), padding-left 0.25s var(--wk-ease);
}

.page-about .about-link > span:first-child {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.page-about .about-link__hint {
  font-size: 13px;
  line-height: 1.6;
  color: var(--wk-slate);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--wk-gold-deep);
  padding-left: 8px;
}

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

  .page-about .about-hero__stat:last-child {
    grid-column: auto;
  }

  .page-about .about-hero__num {
    font-size: clamp(28px, 3.6vw, 42px);
  }

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

  .page-about .about-tools {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 48px);
  }
}

/* ── 窄屏：表格转逐项堆叠 ───────────────── */
@media (max-width: 719px) {
  .page-about .about-table-wrap {
    overflow-x: visible;
  }

  .page-about .about-table thead {
    display: none;
  }

  .page-about .about-table,
  .page-about .about-table tbody,
  .page-about .about-table tr,
  .page-about .about-table td {
    display: block;
    width: 100%;
  }

  .page-about .about-table tr {
    padding: 14px 0 6px;
    border-bottom: 1px solid var(--wk-line-soft);
  }

  .page-about .about-table tr:last-child {
    border-bottom-color: var(--wk-line);
  }

  .page-about .about-table td {
    padding: 8px 0;
    border-bottom: 0;
  }

  .page-about .about-table td::before {
    content: attr(data-label);
    display: block;
    margin-bottom: 5px;
    font-family: var(--wk-font-mono);
    font-size: 11px;
    letter-spacing: 0.14em;
    color: var(--wk-slate);
  }

  .page-about .about-table td:first-child {
    font-size: 13px;
    letter-spacing: 0.08em;
  }

  .page-about .about-figure--side {
    max-width: 100%;
    margin-top: clamp(20px, 4vw, 28px);
  }
}

/* ── 宽屏：侧图分栏 ─────────────────────── */
@media (min-width: 900px) {
  .page-about .about-step__split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(220px, 300px);
    gap: clamp(26px, 4vw, 52px);
    align-items: start;
  }

  .page-about .about-step__split .about-figure--side {
    margin-top: 0;
  }

  .page-about .about-body {
    padding-inline: 0;
  }
}

/* ── 减少动态效果 ───────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-step__tick,
  .page-about .about-link {
    transition: none;
  }
}