.page-faq {
  --faq-rail-w: 236px;
  --faq-gap: clamp(28px, 4vw, 60px);
  color: var(--ink);
  padding-block: clamp(18px, 3vw, 32px) clamp(56px, 8vw, 104px);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 6px 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
}

.page-faq .breadcrumb a {
  color: var(--c-mist);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

.page-faq .breadcrumb a:hover {
  color: var(--c-flag-blue);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: 16px;
  padding-block: clamp(26px, 4.5vw, 52px) clamp(26px, 4vw, 44px);
  border-bottom: 1px solid var(--hair);
}

.page-faq .faq-hero .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-mist);
}

.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 24ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.85rem, 4.2vw, 3rem);
  line-height: 1.2;
  letter-spacing: -0.012em;
}

.page-faq .faq-hero .lede {
  margin: 0;
  max-width: 66ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-dim);
}

.page-faq .faq-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  margin: 4px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--ink-mute);
}

.page-faq .faq-hero__meta span {
  position: relative;
  padding-left: 14px;
}

.page-faq .faq-hero__meta span::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--c-flag-blue);
  transform: translateY(-50%);
}

/* ---------- 布局：左索引 + 右文档 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  min-width: 0;
  padding-block-start: clamp(28px, 4vw, 52px);
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 章节索引 ---------- */
.page-faq .faq-rail {
  min-width: 0;
  border-bottom: 1px solid var(--hair);
  padding: 0 0 14px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-rail::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-mist);
}

.page-faq .faq-rail__list {
  display: flex;
  flex-direction: row;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-rail__list a {
  display: block;
  padding: 7px 13px;
  border-radius: var(--r-pill);
  background: var(--c-ridge);
  color: var(--ink-mute);
  font-size: 14.5px;
  line-height: 1.5;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .faq-rail__list a:hover {
  color: var(--ink);
  background: rgba(58, 114, 248, 0.22);
}

.page-faq .faq-rail__list a:focus-visible {
  outline: 2px solid var(--c-flag-blue);
  outline-offset: 2px;
}

@media (min-width: 1024px) {
  .page-faq .faq-rail {
    position: sticky;
    top: 92px;
    max-height: calc(100vh - 124px);
    overflow-y: auto;
    overflow-x: visible;
    border-bottom: 0;
    border-left: 1px solid var(--hair);
    padding: 0 0 0 18px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 2px;
  }

  .page-faq .faq-rail__list a {
    border-left: 2px solid transparent;
    border-radius: var(--r-sm);
    background: transparent;
    padding: 8px 12px;
  }

  .page-faq .faq-rail__list a:hover {
    border-left-color: var(--c-flag-blue);
    background: rgba(58, 114, 248, 0.14);
  }
}

/* ---------- 文档主体 ---------- */
.page-faq .faq-doc {
  display: grid;
  min-width: 0;
}

.page-faq .faq-section {
  scroll-margin-top: 96px;
  padding-block: clamp(28px, 4.4vw, 52px);
  border-top: 1px solid var(--hair);
}

.page-faq .faq-doc > .faq-section:first-child {
  border-top: 0;
  padding-block-start: 0;
}

.page-faq .faq-section__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-faq .faq-section__head .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-mist);
}

.page-faq .faq-section__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.45rem, 2.7vw, 2.15rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.page-faq .faq-section__sub {
  margin: 0;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-dim);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 0 0 clamp(24px, 3.6vw, 40px);
}

.page-faq .faq-figure figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--ink-mute);
}

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

/* ---------- 六步 ---------- */
.page-faq .faq-steps {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2.4vw, 24px);
  padding-block: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--hair);
}

.page-faq .faq-step:first-child {
  border-top: 0;
  padding-block-start: 0;
}

.page-faq .faq-step__num {
  display: grid;
  place-items: center;
  width: clamp(44px, 6vw, 54px);
  height: clamp(44px, 6vw, 54px);
  border-radius: var(--r-md);
  border: 1px solid var(--hair-strong);
  background: linear-gradient(150deg, rgba(58, 114, 248, 0.28), rgba(108, 92, 224, 0.14));
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 1.4vw, 1.1rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--c-mist);
}

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

.page-faq .faq-step__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

.page-faq .faq-step__body > p {
  margin: 0;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--ink-dim);
}

.page-faq .faq-step__notes {
  display: grid;
  grid-template-columns: 5.6em minmax(0, 1fr);
  gap: 6px 12px;
  margin: 14px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
}

.page-faq .faq-step__notes dt {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-mist);
}

.page-faq .faq-step__notes dd {
  margin: 0;
  color: var(--ink-mute);
}

/* ---------- 分类入口 ---------- */
.page-faq .faq-cat {
  display: grid;
  grid-template-columns: 1fr;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--hair);
}

.page-faq .faq-cat__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding-block: 18px;
  border-bottom: 1px solid var(--hair);
}

.page-faq .faq-cat__idx {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--c-mist);
}

.page-faq .faq-cat__name {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}

.page-faq .faq-cat__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-mute);
}

@media (min-width: 760px) {
  .page-faq .faq-cat {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 56px);
  }
}

/* ---------- 问答折叠组 ---------- */
.page-faq .faq-folds {
  border-top: 1px solid var(--hair);
}

.page-faq .faq-folds .fold {
  border-top: 0;
  border-bottom: 1px solid var(--hair);
  background: transparent;
}

.page-faq .faq-folds .fold > summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 12px;
  position: relative;
  padding: 18px 44px 18px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink);
  transition: color 0.2s var(--ease);
}

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

.page-faq .faq-folds .fold > summary:hover {
  color: var(--c-mist);
}

.page-faq .faq-folds .fold > summary:focus-visible {
  outline: 2px solid var(--c-flag-blue);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

.page-faq .qa-num {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--c-mist);
}

.page-faq .faq-folds .fold > summary::after {
  content: "";
  position: absolute;
  right: 8px;
  top: 50%;
  width: 9px;
  height: 9px;
  border-right: 1.5px solid var(--c-mist);
  border-bottom: 1.5px solid var(--c-mist);
  transform: translateY(-70%) rotate(45deg);
  transition: transform 0.24s var(--ease);
}

.page-faq .faq-folds .fold[open] > summary::after {
  transform: translateY(-30%) rotate(225deg);
}

.page-faq .faq-folds .fold[open] > summary {
  color: var(--c-mist);
}

.page-faq .faq-folds .fold__body {
  padding: 0 44px 22px 0;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-dim);
}

.page-faq .faq-folds .fold__body p {
  margin: 0;
}

.page-faq .faq-folds .fold[open] .fold__body {
  animation: faq-fade-in 240ms var(--ease) both;
}

@keyframes faq-fade-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 报错速查表 ---------- */
.page-faq .faq-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
}

.page-faq .faq-table caption {
  caption-side: top;
  padding-bottom: 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--ink-mute);
}

.page-faq .faq-table th,
.page-faq .faq-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--hair);
}

.page-faq .faq-table thead th {
  border-bottom: 1px solid var(--hair-strong);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--c-mist);
}

.page-faq .faq-table tbody tr:nth-child(even) {
  background: rgba(16, 26, 56, 0.55);
}

.page-faq .faq-table tbody td:first-child {
  width: 32%;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.7;
}

.page-faq .faq-table tbody td:nth-child(2) {
  width: 16%;
  white-space: nowrap;
}

.page-faq .faq-table tbody td:nth-child(3) {
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink-dim);
}

/* ---------- 进一步求助 ---------- */
.page-faq .faq-help {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 34px);
}

.page-faq .faq-help__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-help__list li {
  display: grid;
  grid-template-columns: 3.4em minmax(0, 1fr);
  gap: 12px;
  padding-block: 15px;
  border-bottom: 1px solid var(--hair);
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink-dim);
}

.page-faq .faq-help__list li:first-child {
  border-top: 1px solid var(--hair);
}

.page-faq .faq-help__list .is-mono {
  padding-top: 4px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--c-mist);
}

.page-faq .faq-help__side {
  display: grid;
  align-content: start;
  gap: 14px;
  padding: clamp(20px, 3vw, 28px);
  border-radius: var(--r-lg);
  border: 1px solid var(--hair-strong);
  background: linear-gradient(155deg, rgba(58, 114, 248, 0.2), rgba(108, 92, 224, 0.11) 55%, rgba(7, 11, 26, 0.45));
  box-shadow: var(--shadow-float);
}

.page-faq .faq-help__side p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-dim);
}

.page-faq .faq-help__side .btn {
  justify-self: start;
}

@media (min-width: 880px) {
  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  }
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 600px) {
  .page-faq .faq-step {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .page-faq .faq-step__notes {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .page-faq .faq-step__notes dt {
    padding-top: 6px;
  }

  .page-faq .faq-folds .fold > summary {
    padding-right: 34px;
    font-size: 0.98rem;
  }

  .page-faq .faq-folds .fold__body {
    padding-right: 8px;
  }

  .page-faq .faq-help__list li {
    grid-template-columns: 2.6em minmax(0, 1fr);
    gap: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-folds .fold[open] .fold__body {
    animation: none;
  }

  .page-faq .faq-folds .fold > summary::after,
  .page-faq .faq-rail__list a,
  .page-faq .faq-folds .fold > summary {
    transition: none;
  }
}