.page-faq {
  --faq-hair: rgba(200, 211, 209, .16);
  --faq-silver-soft: #9FB0AD;
  --faq-band-entry: rgba(79, 227, 208, .5);
  --faq-band-sync: rgba(201, 162, 39, .52);
  --faq-band-archive: rgba(232, 180, 74, .5);
  --faq-band-account: rgba(200, 211, 209, .55);
  --faq-panel: linear-gradient(168deg, rgba(20, 50, 41, .82), rgba(16, 21, 18, .88));
  padding-bottom: clamp(56px, 9vw, 110px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  max-width: 76ch;
  padding: clamp(24px, 5vw, 56px) 0 clamp(26px, 4vw, 42px);
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(28px, 6.2vw, 54px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--c-ink);
  margin: 14px 0 18px;
  text-wrap: balance;
}

.page-faq .faq-hero .lede {
  font-family: var(--font-body);
  font-size: clamp(16px, 2.1vw, 18.5px);
  line-height: 1.9;
  color: var(--c-silver);
  max-width: 62ch;
}

.page-faq .faq-facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-facts li {
  display: flex;
  align-items: baseline;
  gap: 7px;
  padding: 9px 15px;
  border: 1px solid var(--faq-hair);
  border-radius: 3px;
  background: rgba(200, 211, 209, .05);
}

.page-faq .faq-facts__num {
  font-size: 19px;
  color: var(--c-cyan);
  letter-spacing: .02em;
}

.page-faq .faq-facts__txt {
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 500;
  color: var(--c-silver);
}

/* ---------- 章节骨架 ---------- */
.page-faq .faq-block {
  padding: clamp(38px, 6vw, 68px) 0;
}

.page-faq .faq-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-bottom: clamp(22px, 3.4vw, 36px);
}

.page-faq .faq-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(38px, 8vw, 76px);
  line-height: .9;
  letter-spacing: -.02em;
  color: transparent;
  -webkit-text-stroke: 1px var(--c-gold);
  opacity: .85;
}

.page-faq .faq-head h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(22px, 3.9vw, 34px);
  line-height: 1.25;
  color: var(--c-ink);
  margin: 0 0 10px;
}

.page-faq .faq-head .lede {
  font-family: var(--font-body);
  font-size: clamp(15.5px, 2vw, 17.5px);
  line-height: 1.9;
  color: var(--c-silver);
  max-width: 60ch;
  margin: 0;
}

@media (min-width: 880px) {
  .page-faq .faq-head {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 34px;
    align-items: start;
  }
}

/* ---------- 01 分类卡 ---------- */
.page-faq .cat-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 700px) {
  .page-faq .cat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 1080px) {
  .page-faq .cat-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-faq .cat-card {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--faq-hair);
  border-radius: 4px;
  background: var(--faq-panel);
  box-shadow: var(--shadow-sheet);
  overflow: hidden;
}

.page-faq .cat-card__band {
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--cat, var(--c-silver));
}

.page-faq .cat-card--entry { --cat: var(--faq-band-entry); }
.page-faq .cat-card--sync { --cat: var(--faq-band-sync); }
.page-faq .cat-card--archive { --cat: var(--faq-band-archive); }
.page-faq .cat-card--account { --cat: var(--faq-band-account); }

.page-faq .cat-card h3 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: .01em;
  color: var(--c-ink);
  margin: 0 0 10px;
}

.page-faq .cat-card p {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.85;
  color: var(--faq-silver-soft);
  margin: 0;
}

/* ---------- 02 筛选 + 问答 ---------- */
.page-faq .filter-bar {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 22px;
}

.page-faq .filter-pop {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .filter-chip {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 13.5px;
  letter-spacing: .02em;
  color: var(--c-silver);
  background: rgba(200, 211, 209, .05);
  border: 1px solid var(--faq-hair);
  border-radius: 999px;
  padding: 8px 16px;
  cursor: pointer;
  transition: color .18s ease, border-color .18s ease, background .18s ease;
}

.page-faq .filter-chip:hover,
.page-faq .filter-chip:focus-visible {
  color: var(--c-ink);
  border-color: var(--line-gold);
}

.page-faq .filter-chip[aria-pressed="true"] {
  color: var(--c-charcoal);
  background: linear-gradient(140deg, var(--c-gold-lit), var(--c-gold));
  border-color: transparent;
}

.page-faq .filter-status {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--faq-silver-soft);
  margin: 0;
  min-height: 1em;
}

.page-faq .qa-list {
  display: grid;
  gap: 12px;
}

.page-faq .qa {
  position: relative;
  border: 1px solid var(--faq-hair);
  border-left-width: 3px;
  border-radius: 4px;
  background: var(--faq-panel);
  box-shadow: var(--shadow-sheet);
  transition: border-color .22s ease, transform .22s ease;
}

.page-faq .qa::after {
  content: "";
  position: absolute;
  inset: 6px -6px -6px 6px;
  border: 1px solid rgba(200, 211, 209, .07);
  border-radius: 4px;
  pointer-events: none;
  z-index: -1;
}

.page-faq .qa[data-tag~="entry"] { border-left-color: var(--faq-band-entry); }
.page-faq .qa[data-tag~="sync"] { border-left-color: var(--faq-band-sync); }
.page-faq .qa[data-tag~="archive"] { border-left-color: var(--faq-band-archive); }
.page-faq .qa[data-tag~="account"] { border-left-color: var(--faq-band-account); }

.page-faq .qa[open] {
  border-color: var(--line-gold);
  border-left-width: 3px;
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 17px clamp(15px, 3vw, 24px);
  cursor: pointer;
  list-style: none;
  transition: background .2s ease;
}

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

.page-faq .qa__q:hover {
  background: rgba(79, 227, 208, .05);
}

.page-faq .qa__num {
  flex: none;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--c-gold);
  padding-top: 4px;
}

.page-faq .qa__text {
  flex: 1 1 auto;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(15.5px, 2.1vw, 17.5px);
  line-height: 1.55;
  color: var(--c-ink);
}

.page-faq .qa__mark {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
  margin-top: 5px;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--c-gold);
  transition: transform .22s ease, opacity .22s ease;
}

.page-faq .qa__mark::before {
  inset: 6px 0 6px 0;
  height: 2px;
}

.page-faq .qa__mark::after {
  inset: 0 6px 0 6px;
  width: 2px;
}

.page-faq .qa[open] .qa__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .qa__a {
  padding: 0 clamp(15px, 3vw, 24px);
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height .3s ease, opacity .24s ease, padding .3s ease;
}

.page-faq .qa[open] .qa__a {
  max-height: 34em;
  opacity: 1;
  padding-bottom: 24px;
}

.page-faq .qa__a p {
  font-family: var(--font-body);
  font-size: clamp(15.5px, 2vw, 17.5px);
  line-height: 2;
  color: var(--c-silver);
  margin: 0;
  max-width: 66ch;
}

.page-faq .qa__a a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 227, 208, .38);
}

.page-faq .qa__a a:hover,
.page-faq .qa__a a:focus-visible {
  border-bottom-color: var(--c-cyan);
}

/* ---------- 03 自查清单 ---------- */
.page-faq .fix-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 840px) {
  .page-faq .fix-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
}

.page-faq .device-card {
  padding: 20px clamp(16px, 2.6vw, 26px) 22px;
  border: 1px solid var(--faq-hair);
  border-radius: 4px;
  background: var(--faq-panel);
  box-shadow: var(--shadow-sheet);
}

.page-faq .device-card__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 16px;
  letter-spacing: .06em;
  color: var(--c-cyan);
  margin: 0 0 6px;
}

.page-faq .step {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  text-align: left;
  padding: 13px 2px;
  border: 0;
  border-top: 1px solid var(--faq-hair);
  background: transparent;
  color: var(--c-ink);
  font: inherit;
  cursor: pointer;
  transition: opacity .2s ease;
}

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

.page-faq .step__box {
  flex: none;
  position: relative;
  width: 17px;
  height: 17px;
  margin-top: 5px;
  border: 1px solid var(--faq-silver-soft);
  border-radius: 3px;
  transition: border-color .2s ease, background .2s ease;
}

.page-faq .step__box::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border-right: 2px solid var(--c-charcoal);
  border-bottom: 2px solid var(--c-charcoal);
  transform: rotate(42deg) scale(0);
  transition: transform .2s ease;
}

.page-faq .step[aria-pressed="true"] .step__box {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
}

.page-faq .step[aria-pressed="true"] .step__box::after {
  transform: rotate(42deg) scale(1);
}

.page-faq .step[aria-pressed="true"] {
  opacity: .48;
}

.page-faq .step__text {
  font-family: var(--font-body);
  font-size: clamp(15px, 2vw, 17px);
  line-height: 1.85;
  color: var(--c-silver);
}

.page-faq .step[aria-pressed="true"] .step__text {
  color: var(--faq-silver-soft);
}

.page-faq .fix-figure,
.page-faq .reach-figure {
  margin: clamp(22px, 3.4vw, 34px) 0 0;
}

.page-faq .figure__cap {
  font-family: var(--font-body);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--faq-silver-soft);
}

/* ---------- 04 联系渠道 ---------- */
.page-faq .reach-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 840px) {
  .page-faq .reach-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
}

.page-faq .reach {
  padding: 22px clamp(17px, 2.6vw, 28px) 24px;
  border: 1px solid var(--faq-hair);
  border-radius: 4px;
  background: var(--faq-panel);
  box-shadow: var(--shadow-sheet);
}

.page-faq .reach--mail {
  border-top: 3px solid var(--c-cyan);
}

.page-faq .reach--call {
  border-top: 3px solid var(--c-gold);
}

.page-faq .reach h3 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 18px;
  color: var(--c-ink);
  margin: 0 0 14px;
}

.page-faq .reach ul {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-faq .reach li {
  position: relative;
  padding-left: 18px;
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--c-silver);
}

.page-faq .reach li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 11px;
  width: 6px;
  height: 6px;
  background: var(--faq-silver-soft);
  transform: rotate(45deg);
}

.page-faq .reach__meta {
  font-family: var(--font-mono);
  font-size: clamp(14px, 2.4vw, 17px);
  letter-spacing: .02em;
  color: var(--c-ink);
  margin: 0 0 8px;
  word-break: break-word;
}

.page-faq .reach__note {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.8;
  color: var(--faq-silver-soft);
  margin: 0;
}

/* ---------- 05 支持范围 ---------- */
.page-faq .scope-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 840px) {
  .page-faq .scope-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
}

.page-faq .scope {
  padding: 22px clamp(17px, 2.6vw, 28px) 24px;
  border: 1px solid var(--faq-hair);
  border-radius: 4px;
  background: var(--faq-panel);
  box-shadow: var(--shadow-sheet);
}

.page-faq .scope--in {
  background: linear-gradient(168deg, rgba(15, 74, 61, .9), rgba(16, 21, 18, .88));
}

.page-faq .scope h3 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 18px;
  color: var(--c-ink);
  margin: 0 0 14px;
}

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

.page-faq .scope li {
  position: relative;
  padding-left: 20px;
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--c-silver);
}

.page-faq .scope--in li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-cyan);
}

.page-faq .scope--out li::before {
  content: "→";
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-gold);
}

.page-faq .scope__note {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.85;
  color: var(--faq-silver-soft);
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-cta {
  margin-top: clamp(24px, 4vw, 40px);
  padding: clamp(22px, 3.4vw, 32px);
  border: 1px solid var(--line-gold);
  border-radius: 4px;
  background: linear-gradient(150deg, rgba(201, 162, 39, .12), rgba(20, 50, 41, .5));
}

.page-faq .faq-cta p {
  font-family: var(--font-body);
  font-size: clamp(15.5px, 2vw, 17.5px);
  line-height: 1.9;
  color: var(--c-ink);
  margin: 0 0 20px;
  max-width: 58ch;
}

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

/* ---------- 收尾留白 ---------- */
.page-faq .faq-block--last {
  padding-bottom: clamp(30px, 5vw, 56px);
}

@media (max-width: 420px) {
  .page-faq .qa__num {
    padding-top: 3px;
    font-size: 12px;
  }

  .page-faq .faq-facts li {
    width: 100%;
  }
}