.page-faq {
  --faq-rail: 262px;
  --faq-hair: rgba(36, 50, 76, .78);
  padding-bottom: clamp(56px, 8vw, 104px);
}

/* ============ 页头 ============ */
.page-faq .faq-masthead {
  padding: clamp(6px, 1.6vw, 18px) 0 clamp(30px, 4.5vw, 54px);
  border-bottom: 1px solid var(--ink-700);
}

.page-faq .faq-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: clamp(22px, 3.4vw, 38px);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--graphite);
}

.page-faq .faq-crumbs a {
  color: var(--graphite);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-crumbs a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .faq-crumbs .sep { color: var(--ink-700); }
.page-faq .faq-crumbs .current { color: var(--paper); }

.page-faq .faq-masthead-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 46px);
}

@media (min-width: 940px) {
  .page-faq .faq-masthead-grid {
    grid-template-columns: minmax(0, 1fr) 268px;
    align-items: end;
  }
}

.page-faq .faq-h1 {
  margin: 14px 0 clamp(18px, 2.4vw, 26px);
  max-width: 900px;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(31px, 6vw, 64px);
  line-height: 1.14;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-lede {
  margin: 0;
  max-width: 46em;
  font-size: clamp(15.5px, 1.35vw, 17.5px);
  line-height: 1.9;
  color: var(--graphite);
}

.page-faq .faq-facts {
  margin: 0;
  border-top: 1px solid var(--ink-700);
}

.page-faq .faq-fact {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--ink-700);
}

.page-faq .faq-fact dt {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--graphite);
}

.page-faq .faq-fact dd {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  letter-spacing: .02em;
  color: var(--paper);
  text-align: right;
}

/* ============ 双栏骨架 ============ */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 40px);
  padding-top: clamp(34px, 5vw, 58px);
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 68px);
  }
}

.page-faq .faq-index-title {
  margin: 0 0 4px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--ink-700);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--graphite);
}

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

.page-faq .faq-index-list li { flex: 0 0 auto; }

.page-faq .faq-index-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 16px 11px 0;
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--graphite);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 1px solid var(--faq-hair);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-index-list .mono {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--orange);
}

.page-faq .faq-index-list a:hover,
.page-faq .faq-index-list a:focus-visible {
  color: var(--paper);
}

@media (min-width: 1024px) {
  .page-faq .faq-index {
    position: sticky;
    top: 128px;
    align-self: start;
  }

  .page-faq .faq-index-list {
    display: block;
    overflow: visible;
  }

  .page-faq .faq-index-list a {
    padding: 12px 6px 12px 0;
    white-space: normal;
    transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
  }

  .page-faq .faq-index-list a:hover,
  .page-faq .faq-index-list a:focus-visible {
    padding-left: 8px;
  }
}

/* ============ 章节 ============ */
.page-faq .faq-block {
  padding-bottom: clamp(46px, 6vw, 76px);
  scroll-margin-top: 124px;
}

.page-faq .faq-block-head {
  position: relative;
  padding: 20px 0 18px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--ink-700);
}

.page-faq .faq-block-head::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 46px;
  height: 3px;
  background: var(--orange);
}

.page-faq .faq-block-num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--orange);
}

.page-faq .faq-block-head h2 {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(23px, 2.7vw, 33px);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-block-note {
  margin: 0;
  max-width: 54ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--graphite);
}

/* ============ 配图 ============ */
.page-faq .faq-figure {
  margin: 0 0 26px;
}

.page-faq .faq-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--ink-700);
  background: var(--ink-800);
}

.page-faq .faq-frame--wide { aspect-ratio: 2 / 1; }
.page-faq .faq-frame--mid { aspect-ratio: 12 / 7; }

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

.page-faq .faq-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .03em;
  color: var(--graphite);
  text-align: left;
}

/* ============ 问答条目 ============ */
.page-faq .qa-item {
  border-bottom: 1px solid var(--ink-700);
  transition: background var(--dur) var(--ease);
}

.page-faq .qa-item:hover { background: rgba(18, 27, 46, .62); }
.page-faq .qa-item[open] { background: rgba(18, 27, 46, .78); }

.page-faq .qa-summary {
  position: relative;
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 15px;
  padding: 20px 52px 20px 18px;
  cursor: pointer;
  list-style: none;
  outline-offset: -2px;
}

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

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

.page-faq .qa-summary::after {
  content: "";
  position: absolute;
  top: 25px;
  right: 6px;
  width: 16px;
  height: 16px;
  background-image:
    linear-gradient(var(--graphite), var(--graphite)),
    linear-gradient(var(--graphite), var(--graphite));
  background-position: center center, center center;
  background-size: 16px 1px, 1px 16px;
  background-repeat: no-repeat;
  transition: background-size var(--dur) var(--ease), background-image var(--dur) var(--ease);
}

.page-faq .qa-item[open] .qa-summary::after {
  background-size: 16px 1px, 1px 0;
}

.page-faq .qa-item:hover .qa-summary::after {
  background-image:
    linear-gradient(var(--cyan), var(--cyan)),
    linear-gradient(var(--cyan), var(--cyan));
}

.page-faq .qa-stock {
  grid-column: 1;
  grid-row: 1 / span 2;
  align-self: start;
  width: 10px;
  height: 10px;
  margin-top: 8px;
  border-radius: 999px;
  background: var(--blue-grey);
  transition: box-shadow var(--dur) var(--ease);
}

.page-faq .qa-item[data-stock="active"] .qa-stock { background: var(--green); }
.page-faq .qa-item[data-stock="pending"] .qa-stock { background: var(--amber); }
.page-faq .qa-item[data-stock="retired"] .qa-stock { background: var(--blue-grey); }

.page-faq .qa-item[open] .qa-stock {
  box-shadow: 0 0 0 4px rgba(47, 211, 200, .16);
}

.page-faq .qa-question {
  grid-column: 2;
  grid-row: 1;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 17px;
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .qa-lead {
  grid-column: 2;
  grid-row: 2;
  margin-top: 7px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--graphite);
}

.page-faq .qa-body {
  padding: 2px 52px 24px 45px;
  border-top: 1px dashed var(--faq-hair);
  margin-top: 4px;
  padding-top: 18px;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--graphite);
}

.page-faq .qa-body p {
  margin: 0 0 12px;
}

.page-faq .qa-body p:last-child { margin-bottom: 0; }

.page-faq .qa-body a {
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .qa-body a:hover {
  color: var(--cyan);
}

.page-faq .qa-body ul {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
}

.page-faq .qa-body li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
}

.page-faq .qa-body li:last-child { margin-bottom: 0; }

.page-faq .qa-body li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: .82em;
  width: 7px;
  height: 1px;
  background: var(--orange);
}

/* ============ 术语表 ============ */
.page-faq .faq-glossary {
  padding-bottom: clamp(40px, 5vw, 60px);
}

.page-faq .faq-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--ink-700);
  border-top: 2px solid var(--orange);
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  font-size: 14.5px;
}

.page-faq .faq-table caption {
  caption-side: top;
  padding: 14px 18px 12px;
  text-align: left;
}

.page-faq .faq-table th,
.page-faq .faq-table td {
  text-align: left;
  vertical-align: top;
}

.page-faq .faq-table thead th {
  padding: 12px 18px;
  background: var(--ink-800);
  border-bottom: 1px solid var(--ink-700);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 400;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--graphite);
  white-space: nowrap;
}

.page-faq .faq-table tbody th {
  padding: 15px 18px;
  font-weight: 600;
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-table tbody td {
  padding: 15px 18px;
  line-height: 1.75;
  color: var(--graphite);
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-table tbody tr:last-child th,
.page-faq .faq-table tbody tr:last-child td {
  border-bottom: none;
}

.page-faq .faq-table tbody tr:hover {
  background: rgba(18, 27, 46, .82);
}

.page-faq .faq-table .code {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--cyan);
  white-space: nowrap;
}

.page-faq .term-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 9px;
  border-radius: 999px;
  vertical-align: middle;
  background: var(--blue-grey);
}

.page-faq .term-dot--active { background: var(--green); }
.page-faq .term-dot--pending { background: var(--amber); }
.page-faq .term-dot--retired { background: var(--blue-grey); }
.page-faq .term-dot--cycle { background: var(--cyan); }
.page-faq .term-dot--warranty { background: var(--orange); }

/* ============ 窄屏微调 ============ */
@media (max-width: 720px) {
  .page-faq .faq-frame--wide { aspect-ratio: 16 / 10; }
  .page-faq .faq-frame--mid { aspect-ratio: 3 / 2; }

  .page-faq .qa-summary {
    padding: 17px 44px 17px 14px;
    column-gap: 12px;
  }

  .page-faq .qa-question { font-size: 16px; }
  .page-faq .qa-lead { font-size: 14px; }

  .page-faq .qa-body {
    padding: 16px 20px 20px 26px;
    font-size: 15px;
  }

  .page-faq .qa-summary::after { top: 22px; right: 2px; }

  .page-faq .faq-fact dd { font-size: 14px; }
}
<<<END>>>