/* ===== 使用教程页 ===== */
.page-faq {
  --faq-rail-w: 216px;
  --faq-gap: clamp(28px, 5vw, 64px);
  --faq-anchor: calc(var(--aoa-header-h) + 22px);
  --faq-narrow: 720px;
}

/* ---- 首屏 ---- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(30px, 5vw, 58px) 0 clamp(26px, 4vw, 46px);
  border-bottom: 1px solid var(--aoa-hairline-soft);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--aoa-grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--aoa-grid-line) 1px, transparent 1px);
  background-size: 96px 96px;
  -webkit-mask-image: linear-gradient(160deg, #000 0%, transparent 72%);
  mask-image: linear-gradient(160deg, #000 0%, transparent 72%);
}

.page-faq .faq-hero .aoa-shell {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .aoa-crumbs {
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--aoa-display);
  font-size: clamp(1.9rem, 4.4vw, 3rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--aoa-cream);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 48ch;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--aoa-mist);
}

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

/* 首屏数字格 */
.page-faq .faq-tally {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--aoa-hairline-soft);
  border-top: 2px solid var(--aoa-mint);
}

.page-faq .faq-tally__cell {
  background: var(--aoa-board);
  padding: 18px 16px 20px;
}

.page-faq .faq-tally__val {
  display: block;
  font-family: var(--aoa-mono);
  font-size: clamp(1.7rem, 3.4vw, 2.3rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--aoa-mint);
}

.page-faq .faq-tally__val small {
  font-size: 0.52em;
  font-weight: 500;
  margin-left: 0.08em;
  color: var(--aoa-mist);
}

.page-faq .faq-tally__key {
  display: block;
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--aoa-mist);
}

/* ---- 主体骨架 ---- */
.page-faq .faq-body {
  padding: clamp(34px, 5vw, 62px) 0 clamp(44px, 6vw, 84px);
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-faq .faq-content {
  min-width: 0;
}

/* ---- 左侧步骤刻度 ---- */
.page-faq .faq-rail__title {
  margin: 0 0 10px;
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 10px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  border-bottom: 1px solid var(--aoa-hairline-soft);
  scrollbar-width: thin;
}

.page-faq .faq-rail__list::-webkit-scrollbar {
  height: 3px;
}

.page-faq .faq-rail__list::-webkit-scrollbar-thumb {
  background: var(--aoa-rock);
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex: none;
  padding: 7px 11px;
  border: 1px solid var(--aoa-hairline-soft);
  color: var(--aoa-mist);
  font-size: 13.5px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--aoa-ease), border-color var(--aoa-ease), background-color var(--aoa-ease);
}

.page-faq .faq-rail__link:hover {
  color: var(--aoa-cream);
  border-color: var(--aoa-mint);
}

.page-faq .faq-rail__no {
  font-family: var(--aoa-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--aoa-rock);
  transition: color var(--aoa-ease);
}

.page-faq .faq-rail__link:hover .faq-rail__no {
  color: var(--aoa-mint);
}

/* ---- 步骤区块 ---- */
.page-faq .faq-step {
  scroll-margin-top: var(--faq-anchor);
}

.page-faq .faq-step + .faq-step {
  margin-top: clamp(38px, 5vw, 66px);
  padding-top: clamp(30px, 4vw, 48px);
  border-top: 1px solid var(--aoa-hairline-soft);
}

.page-faq .faq-step__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 20px;
}

.page-faq .faq-step__no {
  position: relative;
  flex: none;
  font-family: var(--aoa-mono);
  font-size: clamp(2rem, 4.4vw, 2.5rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--aoa-mint);
}

.page-faq .faq-step__no::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -9px;
  width: 26px;
  height: 3px;
  background: var(--aoa-mint);
}

.page-faq .faq-step__head h2 {
  margin: 0;
  font-family: var(--aoa-display);
  font-size: clamp(1.32rem, 2.6vw, 1.85rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--aoa-cream);
}

.page-faq .faq-step > p {
  margin: 0 0 18px;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--aoa-mist);
}

.page-faq .faq-step h3 {
  margin: 0 0 6px;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--aoa-cream);
}

.page-faq .faq-step a,
.page-faq .faq-item__body a {
  color: var(--aoa-mint);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .faq-step a:hover,
.page-faq .faq-item__body a:hover {
  color: var(--aoa-amber);
}

.page-faq .faq-note {
  margin: 14px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--aoa-mint);
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--aoa-mist);
}

/* ---- 编号步骤卡 ---- */
.page-faq .faq-sequence {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--aoa-hairline-soft);
}

.page-faq .faq-sequence > li {
  padding: 18px 20px 20px;
  background: var(--aoa-moss-deep);
}

.page-faq .faq-sequence > li + li {
  border-top: 1px solid var(--aoa-hairline-soft);
}

.page-faq .faq-sequence__tag {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--aoa-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--aoa-amber);
}

.page-faq .faq-sequence p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--aoa-mist);
}

/* ---- 图文分栏 ---- */
.page-faq .faq-split {
  display: grid;
  gap: clamp(20px, 3vw, 30px);
}

.page-faq .faq-split__main p {
  margin: 0 0 16px;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--aoa-mist);
}

.page-faq .faq-split__main h3:not(:first-child) {
  margin-top: 18px;
}

/* ---- 图片 ---- */
.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--aoa-hairline);
  background: var(--aoa-board);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .aoa-media__cap {
  padding: 10px 14px;
  font-family: var(--aoa-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--aoa-rock);
  border-top: 1px solid var(--aoa-hairline-soft);
}

/* ---- 表格 ---- */
.page-faq .faq-table-wrap {
  margin: 24px 0 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-faq .faq-table caption {
  padding-bottom: 10px;
  text-align: left;
  font-family: var(--aoa-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--aoa-rock);
}

.page-faq .faq-table th,
.page-faq .faq-table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  line-height: 1.62;
  border: 1px solid var(--aoa-hairline-soft);
  color: var(--aoa-mist);
}

.page-faq .faq-table thead th {
  background: var(--aoa-board);
  color: var(--aoa-cream);
  font-family: var(--aoa-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.page-faq .faq-table tbody th {
  background: rgba(16, 40, 31, 0.72);
  color: var(--aoa-cream);
  font-weight: 600;
  white-space: nowrap;
}

/* ---- 赛前勾选清单 ---- */
.page-faq .faq-checklist {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  border: 1px solid var(--aoa-hairline-soft);
}

.page-faq .faq-checklist > li {
  background: var(--aoa-moss);
}

.page-faq .faq-checklist > li + li {
  border-top: 1px solid var(--aoa-hairline-soft);
}

.page-faq .faq-check-row {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 15px 18px;
  cursor: pointer;
}

.page-faq .faq-check {
  appearance: none;
  -webkit-appearance: none;
  flex: none;
  position: relative;
  width: 18px;
  height: 18px;
  margin: 3px 0 0;
  border: 1px solid var(--aoa-rock);
  background: transparent;
  cursor: pointer;
  transition: border-color var(--aoa-ease), background-color var(--aoa-ease);
}

.page-faq .faq-check:hover {
  border-color: var(--aoa-mint);
}

.page-faq .faq-check:checked {
  background: var(--aoa-mint);
  border-color: var(--aoa-mint);
}

.page-faq .faq-check:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border: solid var(--aoa-night);
  border-width: 0 2px 2px 0;
  transform: rotate(42deg);
}

.page-faq .faq-check:focus-visible {
  outline: 2px solid var(--aoa-mint);
  outline-offset: 2px;
}

.page-faq .faq-check-row__txt strong {
  display: block;
  margin-bottom: 4px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--aoa-cream);
}

.page-faq .faq-check-row__txt em {
  display: block;
  font-style: normal;
  font-size: 14px;
  line-height: 1.72;
  color: var(--aoa-mist);
}

/* ---- 常见问题 ---- */
.page-faq .faq-qa {
  margin-top: clamp(20px, 3vw, 30px);
  max-width: var(--faq-narrow);
}

.page-faq .faq-qa__group + .faq-qa__group {
  margin-top: 32px;
}

.page-faq .faq-qa__group > h3 {
  margin: 0 0 12px;
  padding-bottom: 9px;
  border-bottom: 1px solid var(--aoa-hairline-soft);
  font-family: var(--aoa-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--aoa-rock);
}

.page-faq .faq-item {
  margin-bottom: 8px;
  border: 1px solid var(--aoa-hairline-soft);
  border-left: 3px solid transparent;
  background: rgba(7, 19, 25, 0.34);
  transition: border-left-color var(--aoa-ease), background-color var(--aoa-ease);
}

.page-faq .faq-item[open] {
  border-left-color: var(--aoa-amber);
  background: rgba(7, 19, 25, 0.74);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--aoa-cream);
  transition: color var(--aoa-ease);
}

.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item > summary::marker {
  content: "";
}

.page-faq .faq-item > summary:hover {
  color: var(--aoa-mint);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--aoa-mint);
  outline-offset: -2px;
}

.page-faq .faq-item__sign {
  flex: none;
  margin-left: auto;
  padding-top: 2px;
  font-family: var(--aoa-mono);
  font-size: 15px;
  line-height: 1;
  color: var(--aoa-rock);
  transition: color var(--aoa-ease), transform var(--aoa-ease);
}

.page-faq .faq-item[open] .faq-item__sign {
  color: var(--aoa-amber);
  transform: rotate(45deg);
}

.page-faq .faq-item__body {
  padding: 0 18px 17px;
  font-size: 14.8px;
  line-height: 1.9;
  color: var(--aoa-mist);
}

.page-faq .faq-item__body p {
  margin: 0;
}

/* ---- 节奏轴间隔 ---- */
.page-faq .aoa-axis {
  margin: clamp(34px, 5vw, 58px) 0;
}

/* ---- 响应式 ---- */
@media (min-width: 640px) {
  .page-faq .faq-tally {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    align-items: end;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: var(--faq-gap);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: var(--faq-anchor);
    align-self: start;
  }

  .page-faq .faq-rail__list {
    display: block;
    overflow: visible;
    padding: 0;
    border-bottom: 0;
  }

  .page-faq .faq-rail__list > li + li {
    margin-top: 2px;
  }

  .page-faq .faq-rail__link {
    display: flex;
    border: 0;
    border-left: 3px solid transparent;
    padding: 10px 0 10px 14px;
    white-space: normal;
    background: transparent;
  }

  .page-faq .faq-rail__link:hover {
    border-left-color: var(--aoa-mint);
    background: linear-gradient(90deg, rgba(59, 224, 176, 0.1), transparent 72%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rail__link,
  .page-faq .faq-check,
  .page-faq .faq-item,
  .page-faq .faq-item__sign,
  .page-faq .faq-step a,
  .page-faq .faq-item__body a {
    transition: none;
  }
}