.page-faq {
  display: block;
  --faq-index-w: 236px;
}

.page-faq .breadcrumb {
  margin: 26px 0 0;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  padding: clamp(36px, 6vw, 76px) 0 clamp(30px, 5vw, 56px);
  border-bottom: var(--rule-thick) solid var(--hairline-700);
}

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

.page-faq .section__kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-1);
  letter-spacing: 0.16em;
  color: var(--cyan-400);
}

.page-faq .faq-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.4rem, 8.4vw, 4.8rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--silver-050);
}

.page-faq .faq-hero__lede {
  margin: 0 0 20px;
  max-width: 62ch;
  color: var(--silver-300);
  font-size: var(--fs-4);
  line-height: 1.72;
}

.page-faq .faq-hero__note {
  margin: 0;
  max-width: 62ch;
  padding-left: 14px;
  border-left: 3px solid var(--hairline-700);
  color: var(--line-soft);
  font-size: var(--fs-2);
  line-height: 1.7;
}

.page-faq .faq-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hairline-700);
  border: var(--rule) solid var(--hairline-700);
}

.page-faq .faq-stats__cell {
  display: grid;
  gap: 4px;
  padding: 16px 14px;
  background: var(--panel-900);
  min-width: 0;
}

.page-faq .faq-stats__num {
  font-family: var(--font-mono);
  font-size: var(--fs-5);
  line-height: 1.1;
  color: var(--silver-050);
}

.page-faq .faq-stats__key {
  font-size: var(--fs-1);
  letter-spacing: 0.06em;
  color: var(--silver-300);
}

.page-faq .faq-vnote {
  display: none;
  writing-mode: vertical-rl;
  padding-left: 12px;
  border-left: 1px solid var(--hairline-700);
  font-family: var(--font-mono);
  font-size: var(--fs-1);
  letter-spacing: 0.28em;
  color: var(--line-soft);
  align-self: stretch;
}

/* ---------- 横向提示带 ---------- */
.page-faq .faq-rail {
  padding: clamp(26px, 4vw, 44px) 0 clamp(22px, 4vw, 38px);
  border-bottom: var(--rule-thick) solid var(--hairline-700);
}

.page-faq .faq-rail .rail__track {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  padding: 0 var(--gutter) 10px;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-rail .rail__track::-webkit-scrollbar {
  height: 6px;
}

.page-faq .faq-rail .rail__track::-webkit-scrollbar-thumb {
  background: var(--hairline-700);
}

.page-faq .faq-rail .rail__track:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 4px;
}

.page-faq .faq-rail .rail__item {
  flex: 0 0 auto;
  scroll-snap-align: start;
  min-width: 0;
}

.page-faq .faq-rail__media {
  width: min(560px, 84vw);
}

.page-faq .faq-rail__card {
  width: min(320px, 76vw);
  padding: 20px;
  background: var(--indigo-zone);
  border: var(--rule) solid var(--hairline-700);
  border-top: 3px solid var(--violet-500);
}

.page-faq .faq-rail__card--jump {
  background: var(--teal-zone);
  border-top-color: var(--cyan-400);
}

.page-faq .faq-rail__card-kicker {
  margin: 0 0 12px;
  font-size: var(--fs-1);
  letter-spacing: 0.14em;
  color: var(--cyan-400);
}

.page-faq .faq-rail__card-text {
  margin: 0;
  font-size: var(--fs-2);
  line-height: 1.8;
  color: var(--silver-300);
}

.page-faq .faq-rail__jump-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-rail__jump-list a {
  display: block;
  padding-left: 14px;
  border-left: 3px solid var(--hairline-700);
  font-size: var(--fs-2);
  line-height: 1.6;
  color: var(--silver-300);
  text-decoration: none;
  transition: color var(--dur-hover), border-color var(--dur-hover);
}

.page-faq .faq-rail__jump-list a:hover,
.page-faq .faq-rail__jump-list a:focus-visible {
  color: var(--silver-050);
  border-left-color: var(--cyan-400);
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
  padding: clamp(32px, 5vw, 68px) 0 clamp(40px, 6vw, 80px);
}

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

.page-faq .section-index__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-1);
  letter-spacing: 0.16em;
  color: var(--cyan-400);
}

.page-faq .section-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .section-index__link {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 10px 12px;
  border-left: 3px solid var(--hairline-700);
  font-size: var(--fs-2);
  color: var(--silver-300);
  text-decoration: none;
  transition: color var(--dur-hover), border-color var(--dur-hover), background var(--dur-hover);
}

.page-faq .section-index__link .mono {
  color: var(--line-soft);
  transition: color var(--dur-hover);
}

.page-faq .section-index__link:hover,
.page-faq .section-index__link:focus-visible {
  color: var(--silver-050);
  border-left-color: var(--cyan-400);
  background: var(--panel-900);
}

.page-faq .section-index__link:hover .mono,
.page-faq .section-index__link:focus-visible .mono {
  color: var(--violet-500);
}

.page-faq .section-index__link:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

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

.page-faq .mono {
  font-family: var(--font-mono);
  font-size: var(--fs-2);
  letter-spacing: 0.02em;
}

/* ---------- 章节通用 ---------- */
.page-faq .faq-section {
  padding-top: 26px;
  margin-bottom: clamp(44px, 6vw, 76px);
  border-top: var(--rule-thick) solid var(--hairline-700);
  scroll-margin-top: calc(var(--nav-h) + 24px);
}

.page-faq .faq-section__kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-1);
  letter-spacing: 0.16em;
  color: var(--violet-500);
}

.page-faq .faq-section__kicker--risk {
  color: var(--amber-400);
}

.page-faq .faq-section__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.55rem, 3.6vw, 2.15rem);
  line-height: 1.16;
  color: var(--silver-050);
}

.page-faq .faq-section__desc {
  margin: 0 0 26px;
  max-width: 66ch;
  font-size: var(--fs-3);
  line-height: 1.78;
  color: var(--silver-300);
}

.page-faq .faq-section__foot {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--hairline-700);
  font-size: var(--fs-1);
  line-height: 1.8;
  color: var(--line-soft);
}

/* ---------- 文档索引表 ---------- */
.page-faq .doc-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: var(--fs-2);
}

.page-faq .doc-table thead th {
  padding: 12px 16px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: var(--fs-1);
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--cyan-400);
  background: var(--teal-zone);
  border-bottom: var(--rule) solid var(--hairline-700);
  white-space: nowrap;
}

.page-faq .doc-table tbody th,
.page-faq .doc-table tbody td {
  padding: 15px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--hairline-700);
  line-height: 1.7;
}

.page-faq .doc-table tbody th {
  font-weight: 600;
  font-size: var(--fs-3);
  color: var(--silver-050);
  white-space: nowrap;
}

.page-faq .doc-table tbody td {
  color: var(--silver-300);
}

.page-faq .doc-table tbody tr {
  transition: background var(--dur-hover);
}

.page-faq .doc-table tbody tr:hover {
  background: rgba(36, 214, 232, 0.06);
}

.page-faq .doc-table .cell-num {
  color: var(--cyan-400);
  white-space: nowrap;
}

/* ---------- 备份区块 ---------- */
.page-faq .faq-backup {
  padding: clamp(20px, 3.5vw, 34px);
  background: var(--wine-zone);
  border: var(--rule) solid var(--hairline-700);
  border-left: var(--rule-thick) solid var(--amber-400);
}

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

.page-faq .faq-backup__figure {
  align-self: start;
}

.page-faq .check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: ck;
  display: grid;
  gap: 18px;
}

.page-faq .check-list__item {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr);
  gap: 0 12px;
  min-width: 0;
}

.page-faq .check-list__item::before {
  counter-increment: ck;
  content: counter(ck, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: var(--fs-2);
  line-height: 1.75;
  color: var(--amber-400);
}

.page-faq .check-list__title {
  margin: 0 0 4px;
  font-size: var(--fs-3);
  font-weight: 600;
  color: var(--silver-050);
}

.page-faq .check-list__desc {
  margin: 0;
  font-size: var(--fs-2);
  line-height: 1.78;
  color: var(--silver-300);
}

.page-faq .faq-risk {
  margin: 26px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--amber-400);
  background: rgba(255, 176, 32, 0.07);
  font-size: var(--fs-2);
  line-height: 1.75;
  color: var(--silver-050);
}

/* ---------- 步骤带 ---------- */
.page-faq .step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--hairline-700);
}

.page-faq .step {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr);
  gap: 0 16px;
  padding: 18px 14px 18px 10px;
  border-bottom: 1px solid var(--hairline-700);
  border-left: 3px solid transparent;
  scroll-margin-top: calc(var(--nav-h) + 24px);
  transition: background var(--dur-hover), border-color var(--dur-hover);
}

.page-faq .step:target {
  background: var(--panel-900);
  border-left-color: var(--cyan-400);
}

.page-faq .step__num {
  font-family: var(--font-mono);
  font-size: var(--fs-4);
  line-height: 1.5;
  color: var(--line-soft);
  text-decoration: none;
  transition: color var(--dur-hover);
}

.page-faq .step__num:hover,
.page-faq .step__num:focus-visible {
  color: var(--silver-050);
}

.page-faq .step__num:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-faq .step:target .step__num {
  color: var(--cyan-400);
}

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

.page-faq .step__title {
  margin: 0 0 6px;
  font-size: var(--fs-3);
  font-weight: 600;
  color: var(--silver-050);
}

.page-faq .step__text {
  margin: 0;
  font-size: var(--fs-2);
  line-height: 1.78;
  color: var(--silver-300);
  max-width: 66ch;
}

.page-faq .step__diff {
  margin: 12px 0 0;
  padding: 10px 12px;
  border-left: 3px solid var(--amber-400);
  background: rgba(255, 176, 32, 0.06);
  font-size: var(--fs-2);
  line-height: 1.72;
  color: var(--silver-300);
}

.page-faq .step__diff-tag {
  display: inline-block;
  margin-right: 8px;
  font-size: var(--fs-1);
  letter-spacing: 0.1em;
  color: var(--amber-400);
}

.page-faq .addr {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
  padding: 14px 16px;
  background: var(--teal-zone);
  border-left: 3px solid var(--cyan-400);
  min-width: 0;
}

.page-faq .addr__label {
  font-size: var(--fs-1);
  letter-spacing: 0.12em;
  color: var(--cyan-400);
}

.page-faq .addr__value {
  font-family: var(--font-mono);
  font-size: var(--fs-2);
  letter-spacing: 0.04em;
  color: var(--silver-050);
  overflow-wrap: anywhere;
}

.page-faq .copy-btn {
  margin-left: auto;
  padding: 7px 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-1);
  letter-spacing: 0.08em;
  color: var(--silver-300);
  background: transparent;
  border: 1px solid var(--hairline-700);
  cursor: pointer;
  transition: color var(--dur-hover), border-color var(--dur-hover), background var(--dur-hover);
}

.page-faq .copy-btn:hover,
.page-faq .copy-btn:focus-visible {
  color: var(--void-950);
  background: var(--cyan-400);
  border-color: var(--cyan-400);
}

.page-faq .copy-btn:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-faq .copy-btn[data-copied="true"] {
  color: var(--void-950);
  background: var(--mint-400);
  border-color: var(--mint-400);
}

/* ---------- 问答折叠 ---------- */
.page-faq .qa-list {
  border-top: 1px solid var(--hairline-700);
}

.page-faq .qa {
  border-bottom: 1px solid var(--hairline-700);
}

.page-faq .qa__q {
  display: flex;
  gap: 16px;
  align-items: baseline;
  justify-content: space-between;
  padding: 16px 4px 16px 0;
  font-size: var(--fs-3);
  font-weight: 600;
  line-height: 1.6;
  color: var(--silver-050);
  cursor: pointer;
  list-style: none;
  transition: color var(--dur-hover);
}

.page-faq .qa__q::-webkit-details-marker {
  display: none;
}

.page-faq .qa__q::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--fs-4);
  line-height: 1;
  color: var(--cyan-400);
}

.page-faq .qa[open] .qa__q::after {
  content: "−";
  color: var(--violet-500);
}

.page-faq .qa__q:hover {
  color: var(--cyan-400);
}

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 3px;
}

.page-faq .qa__body {
  padding: 0 4px 22px 0;
}

.page-faq .qa__body p {
  margin: 0 0 10px;
  max-width: 68ch;
  font-size: var(--fs-3);
  line-height: 1.78;
  color: var(--silver-300);
}

.page-faq .qa__ref {
  font-size: var(--fs-1);
  color: var(--line-soft);
}

/* ---------- 互引 ---------- */
.page-faq .xref {
  border-top: 1px solid var(--hairline-700);
}

.page-faq .xref__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 16px 4px 16px 0;
  border-bottom: 1px solid var(--hairline-700);
  transition: background var(--dur-hover);
}

.page-faq .xref__row:hover {
  background: rgba(123, 92, 255, 0.07);
}

.page-faq .xref__doc {
  color: var(--cyan-400);
}

.page-faq .xref__cases {
  font-size: var(--fs-2);
  line-height: 1.7;
  color: var(--silver-300);
}

/* ---------- 尾部链接 ---------- */
.page-faq .faq-more {
  padding-top: 26px;
  border-top: var(--rule-thick) solid var(--hairline-700);
}

.page-faq .faq-more__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-5);
  color: var(--silver-050);
}

.page-faq .faq-more__text {
  margin: 0 0 20px;
  max-width: 64ch;
  font-size: var(--fs-3);
  line-height: 1.78;
  color: var(--silver-300);
}

.page-faq .faq-more__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-backup__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  }

  .page-faq .xref__row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr);
    gap: 20px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 3fr);
    gap: 48px;
    align-items: end;
  }

  .page-faq .faq-stats {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-stats__cell {
    padding: 15px 18px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, var(--faq-index-w)) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 72px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--nav-h) + 24px);
  }

  .page-faq .step {
    grid-template-columns: 3.6rem minmax(0, 1fr);
    padding: 22px 20px 22px 10px;
  }

  .page-faq .step__num {
    font-size: var(--fs-5);
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px) 28px;
    gap: 48px;
  }

  .page-faq .faq-vnote {
    display: block;
  }
}