/* ===================================================
   品牌档案 / page-about
   =================================================== */

.page-about {
  --ab-gap: clamp(20px, 3.2vw, 44px);
  --ab-line: 2px solid var(--ay-line);
  padding-block: clamp(16px, 3vw, 36px) clamp(64px, 9vw, 140px);
}

/* ---------- 首屏：左图右档 ---------- */

.page-about .ab-hero {
  padding-top: clamp(10px, 2vw, 24px);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 56px);
  align-items: end;
  margin-top: clamp(22px, 3.4vw, 42px);
}

.page-about .ab-hero__figure {
  order: 2;
}

.page-about .ab-hero__copy {
  order: 1;
}

.page-about .ab-hero h1 {
  margin: 14px 0 0;
  font-family: var(--ay-sans);
  font-size: clamp(30px, 5.6vw, 58px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--ay-white);
}

.page-about .ab-hero__lede {
  margin: 22px 0 0;
  max-width: 54ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.9;
  color: var(--ay-mute);
}

@media (min-width: 960px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    gap: clamp(32px, 4.5vw, 72px);
  }
  .page-about .ab-hero__figure {
    order: 1;
  }
  .page-about .ab-hero__copy {
    order: 2;
  }
}

/* ---------- 通用图框 ---------- */

.page-about .ab-figure {
  position: relative;
  margin: 0;
  border: var(--ab-line);
  background: var(--ay-panel);
  overflow: hidden;
}

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

.page-about .ab-hero__figure {
  aspect-ratio: 14 / 9;
}

.page-about .ab-figure__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 6px 12px;
  background: rgba(5, 11, 26, 0.88);
  border-top: var(--ab-line);
  border-right: var(--ab-line);
  font-family: var(--ay-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ay-mute);
}

/* ---------- 首屏数据条 ---------- */

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  margin-top: clamp(28px, 4vw, 52px);
  border: var(--ab-line);
  background: var(--ay-line);
}

.page-about .ab-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(14px, 2vw, 22px);
  background: var(--ay-panel);
  transition: background 0.25s ease;
}

.page-about .ab-stat:hover {
  background: var(--ay-void);
}

.page-about .ab-stat__num {
  font-family: var(--ay-mono);
  font-size: clamp(20px, 2.6vw, 30px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--ay-cyan);
}

.page-about .ab-stat--key .ab-stat__num {
  color: var(--ay-amber);
}

.page-about .ab-stat__label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ay-mute);
}

@media (min-width: 760px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

/* ---------- 章节头 ---------- */

.page-about .ab-head {
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-about .ab-head h2 {
  margin: 12px 0 0;
  max-width: 26ch;
  font-family: var(--ay-sans);
  font-size: clamp(24px, 3.4vw, 40px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--ay-white);
}

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

/* ---------- 双栏与说明卡 ---------- */

.page-about .ab-split {
  display: grid;
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}

.page-about .ay-prose p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--ay-mute);
}

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

.page-about .ab-cards {
  display: grid;
  gap: 2px;
  border: var(--ab-line);
  background: var(--ay-line);
}

.page-about .ab-card {
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--ay-panel);
  transition: background 0.25s ease;
}

.page-about .ab-card:hover {
  background: var(--ay-void);
}

.page-about .ab-card h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--ay-cyan);
}

.page-about .ab-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ay-mute);
}

@media (min-width: 900px) {
  .page-about .ab-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
}

/* ---------- 时间轴 ---------- */

.page-about .ab-tl {
  margin: clamp(32px, 5vw, 64px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-tl__item {
  display: grid;
  grid-template-columns: 58px 18px minmax(0, 1fr);
  column-gap: 10px;
  padding-bottom: clamp(26px, 4vw, 56px);
}

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

.page-about .ab-tl__meta {
  padding-top: 4px;
}

.page-about .ab-tl__year {
  display: block;
  font-family: var(--ay-mono);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--ay-amber);
  word-break: break-all;
}

.page-about .ab-tl__line {
  position: relative;
  display: flex;
  justify-content: center;
}

.page-about .ab-tl__line::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  transform: translateX(-50%);
  background: var(--ay-line);
}

.page-about .ab-tl__item:last-child .ab-tl__line::before {
  background: linear-gradient(
    to bottom,
    var(--ay-line) 0%,
    var(--ay-line) 28%,
    transparent 100%
  );
}

.page-about .ab-tl__dot {
  position: relative;
  z-index: 1;
  width: 13px;
  height: 13px;
  margin-top: 6px;
  background: var(--ay-void);
  border: 2px solid var(--ay-cyan);
  transform: rotate(45deg);
  transition: background 0.25s ease, border-color 0.25s ease;
}

.page-about .ab-tl__content {
  position: relative;
  min-width: 0;
  padding: clamp(16px, 2.4vw, 26px);
  border: var(--ab-line);
  background: var(--ay-panel);
  transition: border-color 0.25s ease, transform 0.2s ease;
}

.page-about .ab-tl__content:hover {
  border-color: var(--ay-cyan);
  transform: translate(2px, -2px);
}

.page-about .ab-tl__idx {
  position: absolute;
  top: 12px;
  right: 14px;
  font-family: var(--ay-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ay-line);
}

.page-about .ab-tl__content h3 {
  margin: 0;
  padding-right: 28px;
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 800;
  line-height: 1.35;
  color: var(--ay-white);
}

.page-about .ab-tl__content > p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ay-mute);
}

.page-about .ab-tl__content details {
  margin-top: 16px;
}

.page-about .ab-tl__content summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid var(--ay-line);
  background: var(--ay-void);
  font-family: var(--ay-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ay-cyan);
  cursor: pointer;
  list-style: none;
  transition: border-color 0.25s ease, color 0.25s ease;
}

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

.page-about .ab-tl__content summary::after {
  content: "＋";
  font-size: 13px;
  line-height: 1;
}

.page-about .ab-tl__content details[open] summary::after {
  content: "－";
}

.page-about .ab-tl__content summary:hover {
  border-color: var(--ay-cyan);
}

.page-about .ab-tl__detail {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--ay-line);
  animation: ab-fade 0.28s ease both;
}

.page-about .ab-tl__detail p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ay-mute);
}

@keyframes ab-fade {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 760px) {
  .page-about .ab-tl__item {
    grid-template-columns: 112px 26px minmax(0, 1fr);
    column-gap: clamp(14px, 2.4vw, 32px);
  }
  .page-about .ab-tl__year {
    font-size: 15px;
    word-break: normal;
  }
  .page-about .ab-tl__dot {
    width: 15px;
    height: 15px;
    margin-top: 5px;
  }
}

/* ---------- 质检与资质 ---------- */

.page-about .ab-qc {
  display: grid;
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}

.page-about .ab-qc__lede {
  margin: 0 0 18px;
  padding-left: 16px;
  border-left: 3px solid var(--ay-cyan);
  font-size: clamp(16px, 1.8vw, 18px);
  line-height: 1.85;
  color: var(--ay-white);
}

.page-about .ab-qc__text p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ay-mute);
}

.page-about .ab-qc__figure {
  aspect-ratio: 5 / 4;
}

.page-about .ab-seals {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-seal {
  padding: 16px;
  border: var(--ab-line);
  background: var(--ay-void);
  transition: border-color 0.25s ease, transform 0.2s ease;
}

.page-about .ab-seal:hover {
  border-color: var(--ay-cyan);
  transform: translateY(-2px);
}

.page-about .ab-seal__mark {
  display: inline-block;
  font-family: var(--ay-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--ay-amber);
}

.page-about .ab-seal__scope {
  display: block;
  margin-top: 10px;
  padding-left: 10px;
  border-left: 2px solid var(--ay-line);
  font-size: 13px;
  line-height: 1.72;
  color: var(--ay-mute);
  transition: border-color 0.25s ease, color 0.25s ease;
}

.page-about .ab-seal:hover .ab-seal__scope {
  border-color: var(--ay-cyan);
  color: var(--ay-white);
}

@media (min-width: 900px) {
  .page-about .ab-qc {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }
}

/* ---------- 苹果端品牌服务 ---------- */

.page-about .ab-ios {
  display: grid;
  border: var(--ab-line);
  background: var(--ay-panel);
  overflow: hidden;
}

.page-about .ab-ios__media {
  position: relative;
  margin: 0;
  aspect-ratio: 12 / 7;
  border-bottom: var(--ab-line);
  background: var(--ay-void);
  overflow: hidden;
}

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

.page-about .ab-ios__body {
  padding: clamp(20px, 3vw, 42px);
}

.page-about .ab-ios__body h2 {
  margin: 12px 0 0;
  max-width: 22ch;
  font-family: var(--ay-sans);
  font-size: clamp(23px, 3.2vw, 36px);
  font-weight: 800;
  line-height: 1.24;
  color: var(--ay-white);
}

.page-about .ab-ios__lede {
  margin: 18px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ay-mute);
}

.page-about .ab-ios__cta {
  margin: 22px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ay-mute);
}

@media (min-width: 900px) {
  .page-about .ab-ios {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    min-height: 420px;
  }
  .page-about .ab-ios__media {
    aspect-ratio: auto;
    height: 100%;
    border-bottom: 0;
    border-right: var(--ab-line);
  }
  .page-about .ab-ios__media img {
    position: absolute;
    inset: 0;
  }
}

/* ---------- 参数台账 ---------- */

.page-about .ab-ledger {
  margin: 22px 0 0;
  border: var(--ab-line);
  background: var(--ay-void);
}

.page-about .ab-ledger__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--ay-line);
}

.page-about .ab-ledger__row:last-child {
  border-bottom: 0;
}

.page-about .ab-ledger__row dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ay-mute);
}

.page-about .ab-ledger__row dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ay-white);
}

.page-about .ab-num {
  font-family: var(--ay-mono);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ay-cyan);
}

.page-about .ab-ledger--wide {
  margin-top: 0;
}

@media (min-width: 560px) {
  .page-about .ab-ledger__row {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: baseline;
    gap: 16px;
  }
}

/* ---------- 合作与荣誉数据 ---------- */

.page-about .ab-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  border: var(--ab-line);
  background: var(--ay-line);
}

.page-about .ab-figure-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(16px, 2.2vw, 26px);
  background: var(--ay-panel);
  transition: background 0.25s ease;
}

.page-about .ab-figure-item:hover {
  background: var(--ay-void);
}

.page-about .ab-figure-item__num {
  font-family: var(--ay-mono);
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: 0.02em;
  color: var(--ay-white);
}

.page-about .ab-figure-item--key .ab-figure-item__num {
  color: var(--ay-amber);
}

.page-about .ab-figure-item__label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ay-mute);
}

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

.page-about .ab-honor {
  margin-top: clamp(24px, 3vw, 36px);
  padding-left: 16px;
  border-left: 3px solid var(--ay-violet);
}

.page-about .ab-honor p {
  margin: 0 0 12px;
  max-width: 70ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ay-mute);
}

.page-about .ab-honor__note {
  margin-bottom: 0;
  font-size: 14px;
}

/* ---------- 结尾动作区 ---------- */

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

.page-about .ab-cta {
  display: grid;
  gap: clamp(22px, 3vw, 36px);
  align-items: center;
  padding: clamp(24px, 3.6vw, 48px);
  border: var(--ab-line);
  background:
    linear-gradient(120deg, rgba(47, 230, 214, 0.12), rgba(122, 92, 255, 0.14)),
    var(--ay-panel);
  box-shadow: var(--ay-shadow);
}

.page-about .ab-cta h2 {
  margin: 0;
  font-family: var(--ay-sans);
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--ay-white);
}

.page-about .ab-cta__body p {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ay-mute);
}

.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 860px) {
  .page-about .ab-cta {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
  }
  .page-about .ab-cta__actions {
    justify-content: flex-end;
  }
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-tl__content,
  .page-about .ab-seal,
  .page-about .ab-tl__dot,
  .page-about .ab-stat,
  .page-about .ab-card,
  .page-about .ab-figure-item {
    transition: none;
  }
  .page-about .ab-tl__detail {
    animation: none;
  }
}