.page-faq {
  background: var(--abyss);
  color: var(--white);
  padding-bottom: clamp(40px, 6vw, 80px);
}

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

.page-faq a:hover,
.page-faq a:focus-visible {
  border-bottom-color: var(--signal);
  outline: none;
}

.page-faq .mono-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
  text-transform: uppercase;
  margin: 0 0 8px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(28px, 5vw, 56px) 0 clamp(24px, 4vw, 36px);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(63, 242, 208, 0.16), transparent 62%),
    linear-gradient(180deg, var(--trench), var(--abyss) 88%);
  border-bottom: 1px solid var(--grid);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -8%;
  bottom: -60%;
  width: 46vw;
  height: 46vw;
  max-width: 520px;
  max-height: 520px;
  border: 1px solid var(--grid);
  border-radius: 50%;
  box-shadow: 0 0 0 28px rgba(30, 70, 87, 0.22), 0 0 0 64px rgba(30, 70, 87, 0.12);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 16px;
}

.page-faq .breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-faq .breadcrumb__sep {
  margin: 0 8px;
  color: var(--grid);
}

.page-faq .breadcrumb__current {
  color: var(--signal);
}

.page-faq .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--signal-dim);
}

.page-faq h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6.4vw, 58px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 15ch;
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 60ch;
  color: var(--mist);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
}

.page-faq .faq-chips {
  list-style: none;
  display: flex;
  gap: 10px;
  margin: 8px 0 0;
  padding: 0 0 8px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-chips li {
  flex: 0 0 auto;
  scroll-snap-align: start;
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  background: var(--hull);
  border: 1px solid var(--grid);
  border-bottom: 1px solid var(--grid);
  color: var(--white);
  font-size: 14px;
  white-space: nowrap;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-chip__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--signal);
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  background: var(--signal);
  color: var(--ink);
  border-color: var(--signal);
}

.page-faq .faq-chip:hover .faq-chip__num,
.page-faq .faq-chip:focus-visible .faq-chip__num {
  color: var(--ink);
}

/* ---------- 三步开始 ---------- */
.page-faq .faq-start {
  padding: clamp(30px, 5vw, 60px) 0 clamp(20px, 3vw, 32px);
}

.page-faq .faq-start__head {
  display: grid;
  gap: 8px;
  margin-bottom: clamp(18px, 3vw, 28px);
  border-left: 3px solid var(--signal);
  padding-left: 16px;
}

.page-faq .faq-start h2,
.page-faq .qa-block h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-faq .faq-start__lead {
  margin: 0;
  max-width: 58ch;
  color: var(--mist);
  line-height: 1.8;
  font-size: 15px;
}

.page-faq .faq-figure {
  margin: 0 0 clamp(20px, 3vw, 28px);
}

.page-faq .faq-figure__frame {
  border: 1px solid var(--grid);
  background: var(--trench);
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 22px 100%, 0 calc(100% - 22px));
}

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

.page-faq .faq-figure__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-faq .faq-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: step;
}

.page-faq .faq-step {
  position: relative;
  padding: 20px 18px 22px;
  background: linear-gradient(160deg, var(--hull), var(--trench));
  border: 1px solid var(--grid);
  border-top: 2px solid var(--signal-dim);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
}

.page-faq .faq-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--amber);
  margin-bottom: 8px;
}

.page-faq .faq-step h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-faq .faq-step p {
  margin: 0;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.75;
}

/* ---------- 主体：目录 + 问答 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: 24px;
  padding-top: clamp(24px, 4vw, 40px);
}

.page-faq .faq-toc {
  background: var(--trench);
  border: 1px solid var(--grid);
  padding: 18px 16px;
}

.page-faq .faq-toc__title {
  margin-bottom: 12px;
  color: var(--signal-dim);
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-toc__list a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 8px 0 8px 10px;
  border-left: 2px solid transparent;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.5;
}

.page-faq .faq-toc__list a:hover,
.page-faq .faq-toc__list a:focus-visible {
  border-left-color: var(--signal);
  border-bottom-color: transparent;
  color: var(--white);
}

.page-faq .faq-toc__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--signal);
}

.page-faq .faq-top {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--mist);
  border-bottom: 1px dashed var(--grid);
}

.page-faq .faq-top:hover,
.page-faq .faq-top:focus-visible {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.page-faq .qa-block {
  padding-bottom: clamp(26px, 4vw, 40px);
  margin-bottom: clamp(26px, 4vw, 40px);
  border-bottom: 1px dashed var(--grid);
}

.page-faq .qa-block:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-faq .qa-block__lead {
  margin: 10px 0 18px;
  max-width: 62ch;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.8;
}

.page-faq .qa {
  background: var(--trench);
  border: 1px solid var(--grid);
  margin-bottom: 10px;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .qa:hover {
  border-color: var(--signal-dim);
}

.page-faq .qa[open] {
  background: var(--hull);
  border-color: var(--signal-dim);
}

.page-faq .qa__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--white);
}

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

.page-faq .qa__q::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--signal);
  line-height: 1;
}

.page-faq .qa[open] .qa__q::after {
  content: "–";
}

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

.page-faq .qa__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--signal);
  flex: 0 0 auto;
}

.page-faq .qa__text {
  flex: 1 1 auto;
}

.page-faq .qa__a {
  padding: 14px 16px 20px;
  border-top: 1px solid var(--grid);
}

.page-faq .qa__concl {
  margin: 0 0 14px;
  padding-left: 12px;
  border-left: 2px solid var(--signal);
  font-size: 15px;
  line-height: 1.75;
  color: var(--white);
}

.page-faq .qa__steps {
  margin: 0;
  padding-left: 20px;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.8;
}

.page-faq .qa__steps li {
  margin-bottom: 6px;
}

.page-faq .qa__steps li::marker {
  font-family: var(--font-mono);
  color: var(--signal-dim);
}

.page-faq .qa__note {
  margin: 0;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.8;
}

/* ---------- 联系支持 ---------- */
.page-faq .qa-block--support .faq-support {
  display: grid;
  gap: 22px;
}

.page-faq .faq-support__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
}

.page-faq .faq-checklist {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-checklist li {
  position: relative;
  padding-left: 20px;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.8;
}

.page-faq .faq-checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background: var(--signal);
  transform: rotate(45deg);
}

.page-faq .faq-checklist strong {
  color: var(--white);
  font-weight: 600;
}

.page-faq .faq-contact {
  display: grid;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
  margin-bottom: 16px;
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding: 12px 14px;
  background: var(--trench);
}

.page-faq .faq-contact__label {
  flex: 0 0 auto;
  margin: 0;
  color: var(--signal-dim);
}

.page-faq .faq-contact__value {
  flex: 1 1 200px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--white);
  word-break: break-word;
}

.page-faq .faq-contact__row:nth-child(2) .faq-contact__value {
  font-family: var(--font-mono);
  letter-spacing: 0.03em;
}

.page-faq .faq-copy {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  padding: 6px 12px;
  background: transparent;
  color: var(--signal);
  border: 1px solid var(--signal-dim);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-copy:hover,
.page-faq .faq-copy:focus-visible {
  background: var(--signal);
  color: var(--ink);
  border-color: var(--signal);
  outline: none;
}

.page-faq .faq-copy[data-copied] {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--ink);
}

.page-faq .faq-support__note {
  margin: 0 0 10px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-support__fig {
  margin: 0;
  border: 1px solid var(--grid);
  background: var(--trench);
  overflow: hidden;
}

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

.page-faq .faq-support__fig figcaption {
  padding: 10px 14px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--mist);
  border-top: 1px solid var(--grid);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    border-top: 1px solid var(--grid);
    padding-top: 22px;
  }

  .page-faq .faq-step {
    border-top-width: 1px;
    border-left: 1px solid var(--grid);
  }

  .page-faq .faq-step:first-child {
    border-left: 0;
  }

  .page-faq .faq-support {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

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

@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    background: transparent;
    border: 0;
    border-left: 1px solid var(--grid);
    padding: 4px 0 4px 18px;
  }

  .page-faq .faq-hero__inner {
    max-width: 900px;
  }

  .page-faq .qa__q {
    padding: 18px 20px;
    font-size: 16px;
  }

  .page-faq .qa__a {
    padding: 18px 20px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 1ms !important;
  }
}

@media print {
  .page-faq .faq-toc,
  .page-faq .faq-top,
  .page-faq .faq-chips,
  .page-faq .faq-copy {
    display: none !important;
  }

  .page-faq {
    background: #fff;
    color: #000;
  }

  .page-faq .qa,
  .page-faq .qa__a,
  .page-faq .qa__q {
    border-color: #999;
    background: #fff;
    color: #000;
    page-break-inside: avoid;
  }
}
<<<END>>>