/* =========================================================
   小屏端常见说明 · FAQ 页面专属样式
   ========================================================= */

.page-faq {
  --faq-pad: clamp(1rem, 2.6vw, 1.5rem);
  --faq-answer-indent: 2.5rem;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-bottom: clamp(2.75rem, 6vw, 4.5rem);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--line) 45%, var(--line) 60%, var(--orange) 100%);
  opacity: 0.6;
}

.page-faq .faq-hero .breadcrumbs {
  margin-bottom: clamp(1.5rem, 3.4vw, 2.5rem);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4.5vw, 3.5rem);
  align-items: start;
}

.page-faq .faq-hero__copy .lede {
  max-width: 62ch;
  margin-top: clamp(1rem, 2.2vw, 1.4rem);
}

/* ---------- 分类索引面板 ---------- */
.page-faq .faq-jump {
  border: var(--hair);
  border-radius: var(--radius-md);
  background: linear-gradient(165deg, var(--panel) 0%, var(--ink-950) 100%);
  padding: clamp(1.1rem, 2.4vw, 1.5rem) clamp(1rem, 2.2vw, 1.35rem);
  box-shadow: var(--shadow);
}

.page-faq .faq-jump__title {
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--slate);
}

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

.page-faq .faq-jump__link {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.62rem 0.1rem;
  border-bottom: 1px solid var(--line);
  color: var(--mist);
  font-size: 0.95rem;
  text-decoration: none;
  transition: color 0.22s var(--ease), transform 0.22s var(--ease), padding 0.22s var(--ease);
}

.page-faq .faq-jump__list li:last-child .faq-jump__link {
  border-bottom: 0;
}

.page-faq .faq-jump__link:hover,
.page-faq .faq-jump__link:focus-visible {
  color: var(--cyan);
  transform: translateX(3px);
}

.page-faq .faq-jump__link[data-active],
.page-faq .faq-jump__link.is-active {
  color: var(--cyan);
  padding-left: 0.6rem;
  box-shadow: inset 2px 0 0 var(--cyan);
}

.page-faq .faq-jump__num {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--cyan);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-block {
  border-top: 1px solid var(--line);
}

.page-faq .faq-block:first-of-type {
  border-top: 0;
}

.page-faq .faq-block__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 3.5vw, 2.5rem);
  align-items: start;
}

.page-faq .faq-block__head {
  display: grid;
  gap: 0.55rem;
}

.page-faq .faq-block__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.35rem, 2.8vw, 1.85rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-faq .faq-block__lead {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--slate);
}

.page-faq .faq-stream {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.2rem, 2.6vw, 1.75rem);
  align-content: start;
  min-width: 0;
}

.page-faq .faq-cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.7rem;
  align-content: start;
  min-width: 0;
}

/* ---------- 问答卡片 ---------- */
.page-faq .faq-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--ink-900);
  overflow: hidden;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease), background 0.25s var(--ease);
}

@media (hover: hover) {
  .page-faq .faq-card:hover {
    transform: translateX(4px);
    border-color: var(--slate);
  }
}

.page-faq .faq-card[open] {
  border-color: var(--cyan);
  background: linear-gradient(180deg, var(--ink-900) 0%, var(--panel) 100%);
}

.page-faq .faq-card__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.85rem;
  padding: var(--faq-pad);
  cursor: pointer;
  list-style: none;
  color: var(--white);
  font-family: var(--font-head);
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0.01em;
}

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

.page-faq .faq-card__q::marker {
  content: "";
}

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

.page-faq .faq-card__num {
  align-self: start;
  padding-top: 0.22em;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .faq-card__icon {
  position: relative;
  width: 14px;
  height: 14px;
  flex: none;
  align-self: center;
}

.page-faq .faq-card__icon::before,
.page-faq .faq-card__icon::after {
  content: "";
  position: absolute;
  background: var(--slate);
  border-radius: 2px;
  transition: transform 0.28s var(--ease), background-color 0.28s var(--ease);
}

.page-faq .faq-card__icon::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 2px;
}

.page-faq .faq-card__icon::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-faq .faq-card[open] .faq-card__icon::before {
  background: var(--cyan);
}

.page-faq .faq-card[open] .faq-card__icon::after {
  transform: scaleY(0);
}

.page-faq .faq-card__a {
  padding: 0 var(--faq-pad) clamp(1rem, 2.2vw, 1.4rem);
  padding-left: calc(var(--faq-pad) + var(--faq-answer-indent));
  color: var(--mist);
  font-size: 0.96rem;
  line-height: 1.85;
}

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

.page-faq .faq-card__a p + p {
  margin-top: 0.7rem;
}

/* ---------- 示意图 ---------- */
.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: linear-gradient(180deg, var(--panel) 0%, var(--ink-950) 100%);
}

.page-faq .faq-figure__frame {
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.page-faq .faq-figure--wide .faq-figure__frame {
  aspect-ratio: 8 / 5;
}

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

.page-faq .faq-figure__cap {
  padding: 0.75rem clamp(1rem, 2.4vw, 1.25rem);
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  line-height: 1.6;
  color: var(--slate);
}

/* ---------- 更新节奏表格 ---------- */
.page-faq .faq-table {
  width: 100%;
  min-width: 540px;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.page-faq .faq-table__caption {
  caption-side: top;
  padding: 0 0 0.85rem;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-faq .faq-table th,
.page-faq .faq-table td {
  padding: 0.85rem 1rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
  line-height: 1.65;
}

.page-faq .faq-table thead th {
  font-family: var(--font-head);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--slate);
  white-space: nowrap;
}

.page-faq .faq-table tbody td {
  color: var(--mist);
}

.page-faq .faq-table tbody td:first-child {
  color: var(--white);
  font-weight: 500;
}

.page-faq .faq-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-faq .faq-table .is-highlight {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: var(--orange);
}

/* ---------- 底部联系面板 ---------- */
.page-faq .faq-help__panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: clamp(1.75rem, 4.5vw, 3.25rem);
  background:
    radial-gradient(520px 220px at 88% 0%, var(--cyan-soft), transparent 68%),
    linear-gradient(160deg, var(--panel) 0%, var(--ink-950) 100%);
}

.page-faq .faq-help__panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: clamp(1.75rem, 4.5vw, 3.25rem);
  width: 74px;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: var(--cyan);
}

.page-faq .faq-help__title {
  margin: 0.5rem 0 0;
  font-family: var(--font-head);
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--white);
}

.page-faq .faq-help__text {
  max-width: 66ch;
  margin: clamp(0.9rem, 2vw, 1.2rem) 0 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: clamp(1.25rem, 2.8vw, 1.75rem);
}

.page-faq .faq-help__meta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin: clamp(1.75rem, 3.8vw, 2.5rem) 0 0;
  padding-top: clamp(1.25rem, 2.8vw, 1.75rem);
  border-top: 1px solid var(--line);
}

.page-faq .faq-help__meta-item dt {
  margin-bottom: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.73rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-faq .faq-help__meta-item dd {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--white);
  word-break: break-word;
}

/* ---------- 回到顶部 ---------- */
.page-faq .faq-top {
  position: fixed;
  right: clamp(1rem, 2vw, 1.75rem);
  bottom: clamp(1rem, 2vw, 1.75rem);
  z-index: 40;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--ink-900);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  box-shadow: var(--shadow);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-faq .faq-top:hover,
.page-faq .faq-top:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
  transform: translateY(-2px);
}

/* ---------- 桌面端非对称布局 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(270px, 0.85fr);
    align-items: end;
    gap: clamp(2.5rem, 5vw, 4rem);
  }

  .page-faq .faq-block__inner {
    grid-template-columns: minmax(200px, 250px) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-faq .faq-block__head {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
  }

  .page-faq .faq-stream,
  .page-faq .faq-cards {
    max-width: 820px;
  }
}

@media (min-width: 720px) {
  .page-faq .faq-help__meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
  }
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 720px) {
  .page-faq .faq-top {
    display: none;
  }
}

@media (max-width: 560px) {
  .page-faq .faq-card__a {
    padding-left: var(--faq-pad);
  }

  .page-faq .faq-card__q {
    gap: 0.65rem;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-card,
  .page-faq .faq-jump__link,
  .page-faq .faq-top,
  .page-faq .faq-card__icon::before,
  .page-faq .faq-card__icon::after {
    transition: none;
  }

  .page-faq .faq-card:hover,
  .page-faq .faq-jump__link:hover,
  .page-faq .faq-top:hover {
    transform: none;
  }
}
<<<END>>>