/* ==========================================================
   品牌总览 / about
   所有页面专属选择器限定在 .page-about 作用域内
   ========================================================== */

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

/* ---------- 首屏 ---------- */

.page-about .ab-hero {
  padding: 36px 0 12px;
}

.page-about .ab-hero__inner {
  display: grid;
  gap: 26px;
}

.page-about .ab-hero__lead {
  min-width: 0;
}

.page-about .ab-hero h1 {
  margin: 16px 0 0;
  font-size: var(--fs-h1);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.025em;
  max-width: 21ch;
  color: var(--ink);
}

.page-about .ab-hero__intro {
  margin: 22px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--graphite);
}

.page-about .ab-hero__side {
  display: flex;
  align-items: flex-start;
}

@media (min-width: 980px) {
  .page-about .ab-hero__inner {
    grid-template-columns: minmax(0, 1fr) 132px;
    column-gap: 48px;
    align-items: flex-end;
  }
  .page-about .ab-hero__side {
    justify-content: flex-end;
    padding-bottom: 8px;
  }
}

/* ---------- 首屏数据条 ---------- */

.page-about .ab-kpis {
  list-style: none;
  margin: 44px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 760px) {
  .page-about .ab-kpis {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .ab-kpi {
  background: var(--paper);
  padding: 22px 16px 24px;
  min-width: 0;
}

.page-about .ab-kpi:nth-child(1) { box-shadow: inset 0 3px 0 var(--blue); }
.page-about .ab-kpi:nth-child(2) { box-shadow: inset 0 3px 0 var(--orange); }
.page-about .ab-kpi:nth-child(3) { box-shadow: inset 0 3px 0 var(--silver); }
.page-about .ab-kpi:nth-child(4) { box-shadow: inset 0 3px 0 var(--bamboo); }

.page-about .ab-kpi__n {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-kpi__l {
  display: block;
  margin-top: 12px;
  font-size: 12px;
  line-height: 1.65;
  color: var(--graphite);
}

/* ---------- 三栏布局 ---------- */

.page-about .ab-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  padding: 48px 0 72px;
}

@media (min-width: 940px) {
  .page-about .ab-layout {
    grid-template-columns: 168px minmax(0, 1fr);
    column-gap: 44px;
    align-items: start;
  }
}

@media (min-width: 1220px) {
  .page-about .ab-layout {
    grid-template-columns: 168px minmax(0, 1fr) 264px;
    column-gap: 48px;
  }
}

.page-about .ab-main {
  min-width: 0;
}

/* ---------- 左侧编号目录 ---------- */

.page-about .ab-toc__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--clay);
}

.page-about .ab-toc__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-toc__list::-webkit-scrollbar {
  display: none;
}

.page-about .ab-toc__link {
  display: block;
  flex: none;
  white-space: nowrap;
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--graphite);
  background: var(--white);
  border: 1px solid var(--line);
  padding: 8px 12px;
  transition: color var(--dur), background var(--dur), border-color var(--dur);
}

.page-about .ab-toc__link:hover {
  color: var(--ink);
  border-color: var(--ink);
}

.page-about .ab-toc__link[aria-current] {
  color: var(--ink);
  border-color: var(--blue);
}

@media (min-width: 940px) {
  .page-about .ab-toc {
    position: sticky;
    top: 96px;
  }
  .page-about .ab-toc__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--line);
  }
  .page-about .ab-toc__link {
    background: transparent;
    border: 0;
    padding: 9px 14px;
  }
  .page-about .ab-toc__link[aria-current] {
    box-shadow: inset 3px 0 0 var(--blue);
    color: var(--blue);
  }
}

/* ---------- 章节骨架 ---------- */

.page-about .ab-sec {
  padding-top: 46px;
  border-top: 1px solid var(--line);
  scroll-margin-top: 104px;
}

.page-about .ab-sec + .ab-sec {
  margin-top: 52px;
}

.page-about .ab-sechead {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 28px;
}

.page-about .ab-secn {
  flex: none;
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-about .ab-sechead__body {
  min-width: 0;
}

.page-about .ab-sectitle {
  margin: 0;
  font-size: var(--fs-h2);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .ab-secdesc {
  margin: 14px 0 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--graphite);
}

/* ---------- 纵向时间轴 ---------- */

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

.page-about .ab-tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--line);
}

.page-about .ab-tl__item {
  position: relative;
  padding-bottom: 32px;
}

.page-about .ab-tl__item:last-child {
  padding-bottom: 0;
}

.page-about .ab-tl__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 6px;
  width: 13px;
  height: 13px;
  box-sizing: border-box;
  background: var(--paper);
  border: 1px solid var(--line);
}

.page-about .ab-tl__item--blue::before {
  background: var(--blue);
  border-color: var(--blue);
}

.page-about .ab-tl__item--orange::before {
  background: var(--orange);
  border-color: var(--orange);
}

.page-about .ab-tl__item--bamboo::before {
  background: var(--bamboo);
  border-color: var(--bamboo);
}

.page-about .ab-tl__head {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about .ab-tl__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink);
  border: 1px solid var(--ink);
  padding: 2px 7px;
}

.page-about .ab-tl__yr {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--graphite);
}

.page-about .ab-tl__title {
  margin: 12px 0 0;
  font-size: var(--fs-h4);
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--ink);
}

/* ---------- 通用条目列表 ---------- */

.page-about .ab-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-about .ab-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .ab-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 7px;
  height: 1px;
  background: var(--clay);
}

/* ---------- 图片容器 ---------- */

.page-about .ab-figure {
  margin: 32px 0 0;
  border: 1px solid var(--line);
  background: var(--white);
}

.page-about .ab-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.page-about .ab-figure--square img {
  aspect-ratio: 1 / 1;
}

.page-about .ab-figure--mid img {
  aspect-ratio: 16 / 10;
}

.page-about .ab-figure figcaption {
  padding: 12px 14px;
  font-size: 12px;
  line-height: 1.75;
  color: var(--graphite);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 三条业务线 ---------- */

.page-about .ab-lines {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 820px) {
  .page-about .ab-lines {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .ab-line {
  display: flex;
  flex-direction: column;
  background: var(--white);
  padding: 22px 20px 26px;
  border-top: 3px solid var(--line);
  min-width: 0;
}

.page-about .ab-line--blue { border-top-color: var(--blue); }
.page-about .ab-line--orange { border-top-color: var(--orange); }
.page-about .ab-line--silver { border-top-color: var(--silver); }

.page-about .ab-line__k {
  align-self: flex-start;
  margin: 0;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--white);
  background: var(--graphite);
}

.page-about .ab-line--blue .ab-line__k { background: var(--blue); }
.page-about .ab-line--orange .ab-line__k { background: var(--orange); }
.page-about .ab-line--silver .ab-line__k { background: var(--silver); color: var(--ink); }

.page-about .ab-line__t {
  margin: 14px 0 0;
  font-size: var(--fs-h4);
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .ab-line__dl {
  margin: 18px 0 0;
  display: grid;
  gap: 11px;
}

.page-about .ab-line__dl > div {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 10px;
  font-size: 13px;
  line-height: 1.7;
}

.page-about .ab-line__dl dt {
  margin: 0;
  font-size: 12px;
  color: var(--graphite);
}

.page-about .ab-line__dl dd {
  margin: 0;
  color: var(--ink);
}

.page-about .ab-line__link {
  margin-top: auto;
  padding-top: 22px;
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--ink);
  transition: color var(--dur), border-color var(--dur);
}

.page-about .ab-line__link:hover {
  color: var(--blue);
  border-color: var(--blue);
}

/* ---------- 认证编号说明块 ---------- */

.page-about .ab-code {
  padding: 20px 22px 22px;
  background: var(--stone);
  border-left: 3px solid var(--ink);
}

.page-about .ab-code__lab {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--clay);
}

.page-about .ab-code__val {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.4vw, 20px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
  word-break: break-word;
}

.page-about .ab-code__hint {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--graphite);
}

/* ---------- 质保档位折叠面板 ---------- */

.page-about .ab-tiers {
  margin-top: 26px;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .ab-tier {
  background: var(--white);
}

.page-about .ab-tier__sum {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  border-left: 3px solid var(--silver);
  transition: background var(--dur);
}

.page-about .ab-tier__sum::-webkit-details-marker {
  display: none;
}

.page-about .ab-tier__sum:hover {
  background: var(--paper);
}

.page-about .ab-tier--b1 .ab-tier__sum { border-left-color: var(--silver); }
.page-about .ab-tier--b2 .ab-tier__sum { border-left-color: var(--blue); }
.page-about .ab-tier--b3 .ab-tier__sum { border-left-color: var(--blue-deep); }
.page-about .ab-tier--b5 .ab-tier__sum { border-left-color: var(--orange); }

.page-about .ab-tier__yr {
  flex: none;
  width: 76px;
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-tier__name {
  font-size: 14px;
  color: var(--graphite);
}

.page-about .ab-tier__mark {
  position: relative;
  flex: none;
  margin-left: auto;
  width: 12px;
  height: 12px;
}

.page-about .ab-tier__mark::before,
.page-about .ab-tier__mark::after {
  content: "";
  position: absolute;
  background: var(--graphite);
  transition: transform var(--dur);
}

.page-about .ab-tier__mark::before {
  left: 0;
  top: 5.5px;
  width: 12px;
  height: 1px;
}

.page-about .ab-tier__mark::after {
  left: 5.5px;
  top: 0;
  width: 1px;
  height: 12px;
}

.page-about .ab-tier[open] .ab-tier__mark::after {
  transform: scaleY(0);
}

.page-about .ab-tier__body {
  padding: 2px 18px 20px 21px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--graphite);
}

.page-about .ab-tier__body p {
  margin: 0;
  max-width: 60ch;
}

/* ---------- 版本管理与图 ---------- */

.page-about .ab-split {
  margin-top: 32px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

@media (min-width: 820px) {
  .page-about .ab-split {
    grid-template-columns: minmax(0, 1fr) 250px;
    column-gap: 32px;
  }
}

.page-about .ab-split__t {
  margin: 0;
  font-size: var(--fs-h4);
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .ab-split__body p {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--graphite);
}

.page-about .ab-split__body .ab-line__link {
  margin-top: 20px;
  padding-top: 0;
}

.page-about .ab-split .ab-figure {
  margin-top: 0;
}

/* ---------- 验资与核验 ---------- */

.page-about .ab-verify {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

@media (min-width: 900px) {
  .page-about .ab-verify {
    grid-template-columns: minmax(0, 1fr) 292px;
    column-gap: 40px;
    align-items: start;
  }
}

.page-about .ab-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .ab-step {
  background: var(--paper);
  padding: 20px 20px 22px;
}

.page-about .ab-step__n {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-about .ab-step__t {
  margin: 10px 0 0;
  font-size: var(--fs-h4);
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .ab-step p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .ab-materials {
  border: 1px solid var(--line);
  background: var(--white);
  padding: 22px 20px 24px;
}

.page-about .ab-materials__t {
  margin: 0;
  font-size: 15px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .ab-materials__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
}

.page-about .ab-materials__list li {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  background: var(--white);
  padding: 12px 0;
  font-size: 13px;
  line-height: 1.7;
}

.page-about .ab-materials__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--graphite);
}

.page-about .ab-materials__v {
  color: var(--ink);
}

.page-about .ab-materials__note {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 12px;
  line-height: 1.8;
  color: var(--graphite);
}

/* ---------- 覆盖地图 ---------- */

.page-about .ab-map-wrap {
  display: grid;
  gap: 20px;
}

@media (min-width: 820px) {
  .page-about .ab-map-wrap {
    grid-template-columns: minmax(0, 1fr) 210px;
    column-gap: 32px;
    align-items: center;
  }
}

.page-about .ab-map {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: 10px;
  padding: 22px;
  border: 1px solid var(--line);
  background: var(--white);
}

.page-about .ab-map__c {
  display: block;
  aspect-ratio: 1 / 1;
  width: 100%;
  max-width: 22px;
  background: var(--silver);
  justify-self: center;
}

.page-about .ab-map__c--city {
  background: var(--orange);
}

.page-about .ab-map__c--hub {
  background: var(--bamboo);
}

.page-about .ab-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-legend li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--graphite);
}

.page-about .ab-legend__sw {
  flex: none;
  width: 12px;
  height: 12px;
  display: block;
}

.page-about .ab-legend__sw--blue { background: var(--silver); }
.page-about .ab-legend__sw--orange { background: var(--orange); }
.page-about .ab-legend__sw--bamboo { background: var(--bamboo); }

/* ---------- 客户结构 ---------- */

.page-about .ab-share {
  margin-top: 32px;
  border-top: 1px solid var(--line);
  padding-top: 26px;
}

.page-about .ab-share__h {
  margin: 0 0 20px;
  font-size: var(--fs-h4);
  font-weight: 800;
  color: var(--ink);
}

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

.page-about .ab-share__row {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr) 46px;
  gap: 14px;
  align-items: center;
}

.page-about .ab-share__name {
  font-size: 13px;
  color: var(--ink);
}

.page-about .ab-share__track {
  position: relative;
  display: block;
  height: 10px;
  background: var(--stone);
}

.page-about .ab-share__fill {
  display: block;
  height: 100%;
}

.page-about .ab-share__fill--blue { width: 45%; background: var(--blue); }
.page-about .ab-share__fill--orange { width: 30%; background: var(--orange); }
.page-about .ab-share__fill--silver { width: 25%; background: var(--silver); }

.page-about .ab-share__pct {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  text-align: right;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-share__note {
  margin: 22px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--graphite);
  max-width: 60ch;
}

/* ---------- 培训排期 ---------- */

.page-about .ab-training {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 820px) {
  .page-about .ab-training {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .ab-training__card {
  background: var(--white);
  padding: 22px 20px 24px;
  border-left: 3px solid var(--stone);
  min-width: 0;
}

.page-about .ab-training__card:nth-child(1) { border-left-color: var(--blue); }
.page-about .ab-training__card:nth-child(2) { border-left-color: var(--orange); }
.page-about .ab-training__card:nth-child(3) { border-left-color: var(--bamboo); }

.page-about .ab-training__k {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--clay);
}

.page-about .ab-training__t {
  margin: 12px 0 0;
  font-size: var(--fs-h4);
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .ab-training__card p {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .ab-training__foot {
  margin: 22px 0 0;
  padding: 16px 18px;
  background: var(--stone);
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink);
  word-break: break-word;
}

/* ---------- 右侧速览卡 ---------- */

.page-about .ab-aside {
  min-width: 0;
}

@media (min-width: 1220px) {
  .page-about .ab-aside {
    position: sticky;
    top: 96px;
  }
}

.page-about .ab-vcard {
  background: var(--ink);
  border: 1px solid var(--ink);
  padding: 22px 20px 24px;
}

.page-about .ab-vcard__top {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--bamboo);
}

.page-about .ab-pulse {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--bamboo);
  animation: ab-pulse 2.4s ease-in-out infinite;
}

@keyframes ab-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.82); }
}

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

.page-about .ab-vcard__big {
  display: block;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 30px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-vcard__meta {
  margin: 12px 0 0;
  font-size: 12px;
  line-height: 1.8;
  color: var(--foot-dim);
}

.page-about .ab-vcard__rows {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line-invert);
  display: grid;
  gap: 11px;
}

.page-about .ab-vcard__row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 12px;
  line-height: 1.6;
}

.page-about .ab-vcard__k {
  color: var(--foot-dim);
}

.page-about .ab-vcard__v {
  font-family: var(--font-mono);
  color: var(--paper);
  text-align: right;
}

.page-about .ab-aside__note {
  margin: 16px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--clay);
  font-size: 12px;
  line-height: 1.8;
  color: var(--graphite);
}

/* ---------- 延伸入口 ---------- */

.page-about .ab-next {
  border-top: 1px solid var(--line);
  background: var(--stone);
  padding: 44px 0 48px;
}

.page-about .ab-next__inner {
  display: grid;
  gap: 26px;
}

@media (min-width: 900px) {
  .page-about .ab-next__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: 48px;
    align-items: center;
  }
}

.page-about .ab-next__t {
  margin: 0;
  font-size: var(--fs-h3);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .ab-next__d {
  margin: 14px 0 0;
  max-width: 46ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--graphite);
}

.page-about .ab-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 520px) {
  .page-about .ab-next__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .ab-next__link {
  display: block;
  padding: 16px 14px;
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--ink);
  text-decoration: none;
  transition: background var(--dur), color var(--dur);
}

.page-about .ab-next__link:hover {
  background: var(--ink);
  color: var(--paper);
}
<<<END>>>