.page-faq {
  --faq-side-w: 236px;
  --faq-topic-gap: clamp(44px, 7vw, 88px);
  display: block;
  color: var(--snow);
  font-family: var(--font-body);
  line-height: 1.75;
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  padding-block: clamp(22px, 4vw, 40px) clamp(28px, 5vw, 52px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 80px 40px;
  opacity: 0.4;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
}

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

.page-faq .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-faq .faq-hero-inner {
  display: grid;
  gap: 16px;
}

.page-faq .hero-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq h1 {
  margin: 0;
  font-size: clamp(27px, 5.2vw, 50px);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: -0.02em;
  max-width: 20em;
  text-wrap: balance;
}

.page-faq .hero-lead {
  margin: 0;
  max-width: 40em;
  font-size: clamp(14.5px, 1.6vw, 16.5px);
  color: var(--mist);
}

.page-faq .hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 6px 0 0;
  padding: 16px 0 0;
  list-style: none;
  border-top: 1px dashed var(--line);
}

.page-faq .hero-stat {
  display: flex;
  align-items: baseline;
  gap: 7px;
}

.page-faq .hero-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 21px;
  font-weight: 700;
  color: var(--sand);
  line-height: 1;
}

.page-faq .hero-lab {
  font-size: 12.5px;
  color: var(--mist);
}

.page-faq .faq-search {
  margin-top: 10px;
  max-width: 560px;
}

.page-faq .faq-search input {
  width: 100%;
  min-height: 46px;
  padding: 12px 16px;
  font: inherit;
  font-size: 15px;
  color: var(--snow);
  background: var(--slate);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-faq .faq-search input::placeholder {
  color: var(--mist);
}

.page-faq .faq-search input:hover {
  border-color: var(--cyan-soft);
  border-left-color: var(--cyan);
}

.page-faq .faq-search input:focus-visible {
  border-color: var(--cyan);
  box-shadow: 0 0 0 1px var(--cyan);
}

.page-faq .faq-search-hint {
  margin: 8px 0 0;
  font-size: 12.5px;
  color: var(--mist);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  padding-top: clamp(26px, 4.5vw, 54px);
  align-items: start;
}

/* ---------- 主题索引 ---------- */
.page-faq .faq-side {
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.page-faq .faq-side-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-faq .faq-side-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-side-link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  flex: 0 0 auto;
  padding: 9px 12px;
  font-size: 13.5px;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.page-faq .faq-side-link .mono {
  font-size: 11px;
  color: var(--sand);
}

.page-faq .faq-side-link:hover,
.page-faq .faq-side-link:focus-visible {
  color: var(--snow);
  border-color: var(--cyan-soft);
  background: var(--slate);
}

.page-faq .faq-side-link.is-active {
  color: var(--cyan);
  border-color: var(--cyan);
  background: var(--slate);
}

/* ---------- 主题区块 ---------- */
.page-faq .faq-topic {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-topic + .faq-topic {
  margin-top: var(--faq-topic-gap);
}

.page-faq .faq-topic-head {
  padding-bottom: 14px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--line);
  position: relative;
}

.page-faq .faq-topic-head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 56px;
  height: 2px;
  background: var(--cyan);
}

.page-faq .faq-topic-head .sec-num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--sand);
}

.page-faq .faq-topic-head .sec-title {
  margin: 0 0 8px;
  font-size: clamp(21px, 2.8vw, 30px);
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-faq .faq-topic-lead {
  margin: 0;
  max-width: 36em;
  font-size: 14.5px;
  color: var(--mist);
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 24px;
  background: var(--slate);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

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

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--mist);
  border-top: 1px solid var(--line);
}

.page-faq .faq-figure--half img {
  aspect-ratio: 10 / 7;
}

/* ---------- 步骤 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 12px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 16px 16px 14px;
  background: var(--slate);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 14px;
  height: 14px;
  background: linear-gradient(135deg, transparent 50%, var(--cyan) 50%);
  opacity: 0.7;
}

.page-faq .step-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 26px;
  line-height: 1;
  font-weight: 700;
  color: var(--cyan);
}

.page-faq .faq-step h3 {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
}

.page-faq .faq-step p {
  margin: 0;
  font-size: 13.5px;
  color: var(--mist);
}

/* ---------- 问答手风琴 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--line);
}

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

.page-faq .qa-head {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .qa-toggle {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  padding: 16px 30px 16px 2px;
  position: relative;
  font: inherit;
  font-size: clamp(14.5px, 1.5vw, 15.5px);
  font-weight: 700;
  line-height: 1.6;
  text-align: left;
  color: var(--snow);
  background: transparent;
  border: 0;
  cursor: pointer;
  transition: color 0.18s ease, background 0.18s ease;
}

.page-faq .qa-toggle::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 16px;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.6;
  color: var(--cyan);
  transition: transform 0.22s ease;
}

.page-faq .qa-toggle[aria-expanded="true"]::after {
  content: "−";
  transform: rotate(180deg);
}

.page-faq .qa-toggle:hover,
.page-faq .qa-toggle:focus-visible {
  color: var(--cyan);
  background: rgba(19, 28, 43, 0.6);
}

.page-faq .qa-idx {
  flex: 0 0 auto;
  margin-top: 3px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--sand);
}

.page-faq .qa-text {
  min-width: 0;
}

.page-faq .qa-panel .panel-body p {
  margin: 0;
  padding: 0 0 18px 34px;
  max-width: 38em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
  border-bottom: 1px dashed transparent;
}

.page-faq .qa-panel .panel-body p strong {
  color: var(--snow);
}

/* 答案里的关键条件用青色细底线标注 */
.page-faq .qa-crit {
  border-bottom: 1px solid var(--cyan-soft);
  padding-bottom: 1px;
  color: var(--snow);
}

/* ---------- 求助区 ---------- */
.page-faq .faq-topic--end .help-grid {
  display: grid;
  gap: 14px;
  margin-bottom: 26px;
}

.page-faq .help-card {
  padding: 18px 18px 20px;
  background: var(--slate);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-faq .help-card--primary {
  border-left: 3px solid var(--orange);
}

.page-faq .help-label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-faq .help-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  word-break: break-word;
}

.page-faq .help-card .help-value {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--sand);
}

.page-faq .help-card p {
  margin: 0 0 14px;
  font-size: 13.5px;
  color: var(--mist);
}

.page-faq .help-card .btn {
  display: inline-block;
}

.page-faq .faq-list--hours {
  margin-top: 4px;
}

.page-faq .faq-footnote {
  margin: 26px 0 0;
  font-size: 13.5px;
  color: var(--mist);
}

.page-faq .faq-footnote a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-soft);
}

.page-faq .faq-footnote a:hover,
.page-faq .faq-footnote a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 断点：桌面 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .help-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .help-grid .help-card--primary {
    grid-column: span 3;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-side-w) minmax(0, 1fr);
    gap: clamp(34px, 5vw, 72px);
  }

  .page-faq .faq-side {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    border-top: 0;
    border-left: 1px solid var(--line);
    padding-top: 0;
    padding-left: 16px;
    max-height: calc(100vh - var(--header-h) - 52px);
    overflow-y: auto;
  }

  .page-faq .faq-side-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-side-link {
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    padding: 9px 10px;
    white-space: normal;
  }

  .page-faq .faq-side-link:hover,
  .page-faq .faq-side-link:focus-visible {
    background: var(--slate);
    border-left-color: var(--cyan-soft);
  }

  .page-faq .faq-side-link.is-active {
    background: transparent;
    border-left-color: var(--cyan);
    color: var(--cyan);
  }

  .page-faq .help-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .help-grid .help-card--primary {
    grid-column: span 3;
  }

  .page-faq .help-card--primary {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    column-gap: 24px;
  }

  .page-faq .help-card--primary .help-label {
    grid-column: 1 / -1;
  }

  .page-faq .help-card--primary p {
    margin-bottom: 0;
  }

  .page-faq .help-card--primary .btn {
    align-self: center;
    white-space: nowrap;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-side {
    --faq-side-w: 250px;
  }
}

/* ---------- 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-toggle::after,
  .page-faq .faq-side-link,
  .page-faq .faq-search input {
    transition: none;
  }
}