.page-faq {
  --faq-pad: clamp(18px, 3vw, 34px);
  --faq-radius: 0;
  display: block;
  padding-bottom: clamp(30px, 5vw, 70px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(26px, 5vw, 68px) 0 clamp(30px, 5vw, 62px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(880px 400px at 10% -16%, rgba(43, 227, 224, .16), transparent 70%),
    radial-gradient(720px 360px at 96% 4%, rgba(255, 46, 136, .17), transparent 74%),
    linear-gradient(180deg, rgba(30, 18, 54, .55), transparent 78%);
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 46px);
  align-items: end;
}

.page-faq .faq-hero-copy {
  min-width: 0;
}

.page-faq .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: .04em;
  color: var(--muted);
}

.page-faq .crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

.page-faq .crumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

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

.page-faq .crumbs [aria-current="page"] {
  color: var(--hi);
}

.page-faq .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mg);
}

.page-faq h1 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: var(--fs-56);
  line-height: .98;
  letter-spacing: -.02em;
  color: var(--text);
  text-shadow: 0 0 26px rgba(43, 227, 224, .28);
}

.page-faq .lede {
  max-width: 62ch;
  margin: 0;
  font-size: var(--fs-17);
  line-height: 1.78;
  color: var(--muted);
}

/* 检索条 */
.page-faq .faq-filter {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: clamp(20px, 3.2vw, 32px);
}

.page-faq .faq-filter .filter-input {
  width: 100%;
  min-height: 56px;
  padding: 15px 18px;
  background: rgba(43, 227, 224, .06);
  border: 1px solid var(--line-cy);
  border-radius: var(--faq-radius);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: .02em;
  transition: border-color .16s var(--ease), box-shadow .16s var(--ease), background .16s var(--ease);
}

.page-faq .faq-filter .filter-input::placeholder {
  color: rgba(142, 155, 199, .85);
}

.page-faq .faq-filter .filter-input:focus {
  outline: none;
  background: rgba(43, 227, 224, .1);
  border-color: var(--cy);
  box-shadow: 0 0 0 1px var(--cy), 0 0 28px rgba(43, 227, 224, .24);
}

.page-faq .faq-filter .filter-count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: .04em;
  color: var(--muted);
}

.page-faq .faq-hero-keys {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0;
  list-style: none;
  font-size: var(--fs-14);
  color: var(--muted);
}

.page-faq .faq-hero-keys .mono {
  display: inline-block;
  margin-right: 6px;
  padding: 2px 7px;
  background: rgba(43, 227, 224, .08);
  border: 1px solid var(--line-cy);
  color: var(--cy);
  font-size: var(--fs-13);
  letter-spacing: .06em;
}

.page-faq .faq-hero-figure {
  aspect-ratio: 3 / 2;
  margin: 0;
  border: 1px solid var(--line);
  background: var(--tier);
  position: relative;
}

.page-faq .faq-hero-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(20, 11, 38, .1), rgba(20, 11, 38, .55));
}

.page-faq .faq-hero-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.1) contrast(1.05);
}

.page-faq .faq-hero-figure .frame-cap {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 1;
  margin: 0;
  padding: 9px 14px;
  background: rgba(20, 11, 38, .86);
  border-top: 1px solid var(--line-cy);
  border-right: 1px solid var(--line-cy);
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: .04em;
  color: var(--cy);
}

/* ---------- 分类块 ---------- */
.page-faq .faq-cats-wrap {
  padding-top: clamp(32px, 5vw, 62px);
}

.page-faq .faq-cats-lede {
  max-width: 60ch;
  margin: 12px 0 0;
  font-size: var(--fs-17);
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-cats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(20px, 3vw, 32px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .cat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 15px 20px;
  background: var(--tier);
  color: var(--text);
  text-decoration: none;
  position: relative;
  transition: background .16s var(--ease), box-shadow .16s var(--ease);
}

.page-faq .cat::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 2px;
  background: var(--cy);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .18s var(--ease);
}

.page-faq .cat:hover {
  background: #241548;
  box-shadow: inset 0 0 0 1px var(--line-cy);
}

.page-faq .cat:hover::before {
  transform: scaleX(1);
}

.page-faq .cat-code {
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: .12em;
  color: var(--mg);
}

.page-faq .cat-name {
  font-family: var(--font-display);
  font-size: var(--fs-24);
  line-height: 1.1;
  letter-spacing: -.01em;
}

.page-faq .cat-num {
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 换设备引导卡 ---------- */
.page-faq .faq-switch-wrap {
  padding-top: clamp(34px, 5vw, 66px);
}

.page-faq .switch-card {
  position: relative;
  padding: var(--faq-pad);
  border: 1px solid var(--line-cy);
  background:
    linear-gradient(155deg, rgba(43, 227, 224, .09), rgba(255, 46, 136, .06) 58%, transparent 90%),
    var(--tier);
  box-shadow: 14px 14px 0 -1px rgba(122, 20, 64, .5);
}

.page-faq .switch-head h2 {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-size: var(--fs-34);
  line-height: 1.06;
  letter-spacing: -.015em;
  color: var(--text);
}

.page-faq .switch-intro {
  max-width: 66ch;
  margin: 0;
  font-size: var(--fs-17);
  line-height: 1.76;
  color: var(--muted);
}

.page-faq .switch-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(22px, 3.2vw, 34px);
  align-items: start;
}

.page-faq .switch-steps {
  min-width: 0;
  border-top: 1px solid var(--line);
}

.page-faq .switch-step {
  border-bottom: 1px solid var(--line);
  background: transparent;
  transition: background .16s var(--ease);
}

.page-faq .switch-step .accordion-head {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 15px 4px;
  background: none;
  border: 0;
  color: var(--text);
  text-align: left;
  font-family: var(--font-body);
  font-size: var(--fs-17);
  cursor: pointer;
}

.page-faq .step-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: .1em;
  color: var(--bg);
  background: var(--cy);
  padding: 3px 8px;
  transition: background .16s var(--ease), color .16s var(--ease);
}

.page-faq .step-name {
  flex: 1 1 auto;
  font-weight: 600;
}

.page-faq .switch-step[data-open] {
  background: rgba(43, 227, 224, .05);
}

.page-faq .switch-step[data-open] .step-num {
  background: var(--hi);
  color: var(--bg);
}

.page-faq .switch-step .accordion-panel {
  padding: 0 4px 18px 52px;
  font-size: var(--fs-17);
  line-height: 1.76;
  color: var(--muted);
}

.page-faq .switch-step .accordion-panel p {
  margin: 0;
}

.page-faq .switch-figure {
  aspect-ratio: 3 / 2;
  margin: 0;
  border: 1px solid var(--line);
  background: var(--bg);
}

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

.page-faq .switch-figure .frame-cap {
  margin: 0;
  padding: 9px 13px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: .04em;
  color: var(--muted);
  background: rgba(30, 18, 54, .9);
}

/* ---------- 空结果提示 ---------- */
.page-faq .faq-miss {
  max-width: var(--shell);
  margin: clamp(24px, 4vw, 40px) auto 0;
  padding: 14px var(--gutter);
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: .03em;
  color: var(--hi);
  border-left: 2px solid var(--hi);
  background: rgba(233, 255, 90, .07);
}

/* ---------- 问答区 ---------- */
.page-faq .faq-qa {
  padding-top: clamp(34px, 5vw, 66px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(28px, 4vw, 46px);
}

.page-faq .faq-group-title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-serif);
  font-size: var(--fs-24);
  font-weight: 700;
  color: var(--text);
}

.page-faq .faq-group-code {
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: .12em;
  color: var(--mg);
}

.page-faq .faq-item {
  border-left: 2px solid transparent;
  background: var(--tier);
  border-bottom: 1px solid var(--line);
  transition: border-color .16s var(--ease), background .16s var(--ease);
}

.page-faq .faq-item:hover {
  background: #241548;
}

.page-faq .faq-item[data-open] {
  border-left-color: var(--mg);
  background: #241548;
}

.page-faq .faq-item .accordion-head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  width: 100%;
  padding: 16px 16px 16px 14px;
  background: none;
  border: 0;
  color: var(--text);
  text-align: left;
  font-family: var(--font-body);
  font-size: var(--fs-17);
  line-height: 1.55;
  cursor: pointer;
}

.page-faq .faq-q {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-q-num {
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: .08em;
  color: var(--muted);
}

.page-faq .faq-item[data-open] .faq-q-num {
  color: var(--cy);
}

.page-faq .accordion-sign {
  flex: 0 0 auto;
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 4px;
}

.page-faq .accordion-sign::before,
.page-faq .accordion-sign::after {
  content: "";
  position: absolute;
  background: var(--cy);
  transition: transform .18s var(--ease), background .18s var(--ease);
}

.page-faq .accordion-sign::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 1px;
}

.page-faq .accordion-sign::after {
  left: 7px;
  top: 0;
  width: 1px;
  height: 16px;
}

.page-faq .faq-item[data-open] .accordion-sign::after,
.page-faq .switch-step[data-open] .accordion-sign::after {
  transform: scaleY(0);
}

.page-faq .faq-item[data-open] .accordion-sign::before,
.page-faq .switch-step[data-open] .accordion-sign::before {
  background: var(--hi);
}

.page-faq .faq-item .accordion-panel {
  padding: 0 18px 18px 14px;
  font-size: var(--fs-17);
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-item .accordion-panel p {
  margin: 0;
  max-width: 74ch;
}

.page-faq .faq-item .accordion-panel .mark {
  color: var(--hi);
  background: rgba(233, 255, 90, .12);
  padding: 0 3px;
}

.page-faq .accordion-panel[hidden] {
  display: none;
}

/* ---------- 兜底咨询 ---------- */
.page-faq .faq-help {
  padding-top: clamp(36px, 5vw, 70px);
}

.page-faq .help-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  padding: var(--faq-pad);
  border: 1px solid var(--line);
  background: linear-gradient(200deg, rgba(255, 46, 136, .08), transparent 62%), var(--bg);
}

.page-faq .help-copy h2 {
  margin: 10px 0 14px;
  font-family: var(--font-display);
  font-size: var(--fs-34);
  line-height: 1.06;
  letter-spacing: -.015em;
  color: var(--text);
}

.page-faq .help-copy > p {
  max-width: 62ch;
  margin: 0;
  font-size: var(--fs-17);
  line-height: 1.76;
  color: var(--muted);
}

.page-faq .help-list {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-faq .help-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: var(--fs-17);
  line-height: 1.7;
  color: var(--text);
}

.page-faq .help-step {
  flex: 0 0 auto;
  margin-top: 3px;
  padding: 2px 7px;
  background: rgba(43, 227, 224, .08);
  border: 1px solid var(--line-cy);
  color: var(--cy);
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: .08em;
}

.page-faq .help-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-faq .help-card {
  align-self: start;
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--line-cy);
  background: var(--tier);
  box-shadow: 10px 10px 0 -1px rgba(122, 20, 64, .42);
}

.page-faq .help-card-label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: .14em;
  color: var(--mg);
  text-transform: uppercase;
}

.page-faq .help-meta {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-faq .help-meta > div {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .help-meta > div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .help-meta dt {
  margin: 0 0 5px;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: .08em;
  color: var(--muted);
}

.page-faq .help-meta dd {
  margin: 0;
  font-size: var(--fs-17);
  line-height: 1.5;
  color: var(--text);
  word-break: break-word;
}

.page-faq .help-card-note {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .help-card-note a {
  color: var(--cy);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cy);
  transition: border-color .16s var(--ease), color .16s var(--ease);
}

.page-faq .help-card-note a:hover {
  color: var(--hi);
  border-bottom-color: var(--hi);
}

/* ---------- 断点 ---------- */
@media (min-width: 680px) {
  .page-faq .faq-cats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
  }

  .page-faq .faq-cats {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-faq .switch-body {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
  }

  .page-faq .help-band {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .65fr);
  }

  .page-faq h1 {
    font-size: var(--fs-88);
  }
}

@media (min-width: 1120px) {
  .page-faq .faq-hero {
    padding-top: clamp(40px, 6vw, 84px);
  }

  .page-faq .faq-group .accordion-head {
    padding-right: 26px;
  }

  .page-faq .faq-group .accordion-panel {
    padding-right: 26px;
    padding-left: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}