.page-faq {
  --faq-rail: 252px;
  --faq-hair: rgba(37, 214, 232, 0.26);
  --faq-glass: rgba(14, 21, 51, 0.74);
  background: var(--ink-950);
  color: var(--slate-300);
  font-family: var(--font-sans);
  padding-bottom: clamp(56px, 8vw, 108px);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(24px, 4vw, 52px) 0 clamp(30px, 4.6vw, 56px);
  border-bottom: 1px solid var(--ink-700);
  background:
    radial-gradient(120% 92% at 90% -12%, rgba(37, 214, 232, 0.16), transparent 62%),
    radial-gradient(86% 74% at 2% 112%, rgba(124, 99, 255, 0.14), transparent 64%),
    var(--ink-950);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(29, 39, 82, 0.6) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(29, 39, 82, 0.6) 1px, transparent 1px);
  background-size: 68px 68px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 78%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 78%);
  opacity: 0.55;
  pointer-events: none;
}

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

.page-faq .breadcrumb {
  font-size: var(--t-xs);
  color: rgba(195, 204, 230, 0.7);
}

.page-faq .breadcrumb a {
  color: var(--cyan-200);
  text-decoration: none;
}

.page-faq .breadcrumb a:hover {
  color: var(--lime-400);
}

.page-faq .breadcrumb__sep {
  margin: 0 8px;
  color: var(--ink-700);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.6vw, 52px);
  margin-top: clamp(22px, 3.2vw, 40px);
}

.page-faq .faq-hero__title {
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(32px, 6.4vw, 56px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--white-050);
  margin: 12px 0 0;
  max-width: 19ch;
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 56ch;
  font-size: var(--t-sm);
  line-height: 1.78;
  color: var(--slate-300);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero__aside {
  border: 1px solid var(--ink-700);
  border-radius: var(--r-md);
  background: var(--faq-glass);
  padding: clamp(18px, 2.4vw, 26px);
}

.page-faq .faq-hero__aside-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan-200);
}

.page-faq .faq-hero__aside-num {
  margin: 8px 0 0;
  font-size: clamp(40px, 6vw, 56px);
  line-height: 1;
  color: var(--white-050);
  letter-spacing: -0.02em;
}

.page-faq .faq-hero__aside-text {
  margin: 10px 0 0;
  font-size: var(--t-sm);
  line-height: 1.7;
  color: var(--slate-300);
}

.page-faq .faq-hero__aside-note {
  margin: 14px 0 0;
  font-size: var(--t-xs);
  line-height: 1.7;
  color: rgba(195, 204, 230, 0.72);
}

.page-faq .faq-hero__aside .rule {
  display: block;
  margin: 18px 0 0;
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 54px);
  margin-top: clamp(30px, 4.4vw, 58px);
}

.page-faq .faq-index {
  border: 1px solid var(--ink-700);
  border-radius: var(--r-md);
  background: var(--ink-900);
  padding: 15px 14px 12px;
}

.page-faq .faq-index__title {
  margin: 0 0 4px;
  padding-left: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: max-content;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 14px;
  border: 1px solid var(--ink-700);
  border-radius: var(--pill);
  color: var(--slate-300);
  font-size: var(--t-sm);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-index__list a:hover {
  color: var(--white-050);
  border-color: var(--cyan-400);
}

.page-faq .faq-index__list a[aria-current="true"] {
  color: var(--white-050);
  background: rgba(37, 214, 232, 0.12);
  border-color: var(--lime-400);
}

.page-faq .faq-index__num {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan-400);
}

.page-faq .faq-index__list a[aria-current="true"] .faq-index__num {
  color: var(--lime-400);
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  scroll-margin-top: calc(var(--topbar-h) + 20px);
  padding-top: clamp(28px, 3.6vw, 42px);
  border-top: 1px solid var(--ink-700);
  margin-bottom: clamp(46px, 6vw, 82px);
}

.page-faq .faq-body > .faq-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-section--last {
  margin-bottom: clamp(24px, 3vw, 40px);
}

.page-faq .faq-section__head .section-title {
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(25px, 3.6vw, 40px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--white-050);
  margin: 10px 0 0;
  max-width: 26ch;
}

.page-faq .faq-section__intro {
  margin: 14px 0 0;
  max-width: 64ch;
  font-size: var(--t-sm);
  line-height: 1.8;
  color: var(--slate-300);
}

.page-faq .faq-section__foot {
  margin: clamp(22px, 3vw, 30px) 0 0;
  font-size: var(--t-xs);
  line-height: 1.8;
  color: rgba(195, 204, 230, 0.74);
}

.page-faq .faq-section__foot .link-quiet {
  color: var(--cyan-200);
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: clamp(22px, 3vw, 34px) 0 0;
  border: 1px solid var(--ink-700);
  border-radius: var(--r-md);
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(37, 214, 232, 0.07), transparent 60%),
    var(--ink-900);
}

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

.page-faq .faq-figure figcaption {
  padding: 12px 16px 14px;
  font-size: var(--t-xs);
  line-height: 1.7;
  color: var(--cyan-200);
  border-top: 1px dashed var(--ink-700);
}

/* ---------- 三步 ---------- */
.page-faq .steps {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ink-700);
  border: 1px solid var(--ink-700);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-faq .steps__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--ink-900);
  padding: clamp(16px, 2.2vw, 24px);
}

.page-faq .steps__num {
  font-size: var(--t-md);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--orange-500);
}

.page-faq .steps__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: var(--t-md);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--white-050);
}

.page-faq .steps__text {
  margin: 0;
  font-size: var(--t-sm);
  line-height: 1.75;
  color: var(--slate-300);
}

/* ---------- 纸面提示块 ---------- */
.page-faq .hint-block {
  margin-top: clamp(22px, 3vw, 30px);
  padding: clamp(20px, 3vw, 32px);
  border-radius: var(--r-lg);
  background: var(--paper-100);
  color: #2a3357;
}

.page-faq .hint-block__title {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-size: var(--t-md);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink-950);
}

.page-faq .hint-block__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .hint-block__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  font-size: var(--t-sm);
  line-height: 1.74;
}

.page-faq .hint-block__key {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.6;
  background: var(--orange-500);
  color: #2a1200;
  border-radius: var(--pill);
  padding: 0 10px;
  margin-top: 3px;
}

/* ---------- 排查清单 ---------- */
.page-faq .checklist {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  counter-reset: check;
}

.page-faq .checklist__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 16px;
  border: 1px solid var(--ink-700);
  border-left: 2px solid var(--cyan-400);
  border-radius: var(--r-sm);
  background: rgba(14, 21, 51, 0.6);
}

.page-faq .checklist__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(37, 214, 232, 0.14);
  color: var(--cyan-200);
  font-size: 12px;
  line-height: 1;
}

.page-faq .checklist__item p {
  margin: 0;
  font-size: var(--t-sm);
  line-height: 1.75;
  color: var(--slate-300);
}

/* ---------- 平板数据行 ---------- */
.page-faq .fact-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(22px, 3vw, 30px);
  background: var(--ink-700);
  border: 1px solid var(--ink-700);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-faq .fact-row__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(16px, 2.2vw, 22px);
  background: var(--ink-900);
}

.page-faq .fact-row__value {
  font-size: var(--t-lg);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--cyan-200);
}

.page-faq .fact-row__label {
  font-size: var(--t-xs);
  letter-spacing: 0.04em;
  color: rgba(195, 204, 230, 0.78);
}

/* ---------- 索引筛选示意 ---------- */
.page-faq .filter-demo {
  margin-top: clamp(22px, 3vw, 30px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--ink-700);
  border-radius: var(--r-md);
  background:
    linear-gradient(140deg, rgba(37, 214, 232, 0.08), transparent 58%),
    var(--ink-900);
}

.page-faq .filter-demo__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.page-faq .filter-demo .chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

/* ---------- 问答折叠 ---------- */
.page-faq .qa-list {
  margin-top: clamp(22px, 3vw, 32px);
  border-top: 1px solid var(--ink-700);
}

.page-faq .qa {
  position: relative;
  border-bottom: 1px solid var(--ink-700);
}

.page-faq .qa::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: var(--pill);
  background: linear-gradient(180deg, var(--lime-400) 0%, rgba(168, 240, 60, 0.1) 100%);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 0.46s var(--ease);
}

.page-faq .qa:has(.qa__trigger[aria-expanded="true"])::before {
  transform: scaleY(1);
}

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

.page-faq .qa__trigger {
  width: 100%;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
  padding: 17px 14px 17px 18px;
  background: none;
  border: 0;
  color: var(--white-050);
  font: inherit;
  font-size: var(--t-sm);
  line-height: 1.6;
  text-align: left;
  cursor: pointer;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .qa__trigger:hover {
  color: var(--cyan-200);
  background: rgba(37, 214, 232, 0.05);
}

.page-faq .qa__idx {
  font-size: 12px;
  letter-spacing: 0.08em;
  line-height: 1.9;
  color: rgba(157, 235, 245, 0.5);
  transition: color 0.25s var(--ease);
}

.page-faq .qa__trigger[aria-expanded="true"] .qa__idx {
  color: var(--lime-400);
}

.page-faq .qa__text {
  display: block;
}

.page-faq .qa .fold__mark {
  position: relative;
  width: 18px;
  height: 18px;
  margin-top: 4px;
  flex: none;
}

.page-faq .qa .fold__mark::before,
.page-faq .qa .fold__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--cyan-400);
  transform: translate(-50%, -50%);
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.page-faq .qa .fold__mark::before {
  width: 14px;
  height: 1.5px;
}

.page-faq .qa .fold__mark::after {
  width: 1.5px;
  height: 14px;
}

.page-faq .qa__trigger[aria-expanded="true"] .fold__mark::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-faq .qa__panel {
  padding: 0 18px 20px 46px;
  font-size: var(--t-sm);
  line-height: 1.8;
  color: var(--slate-300);
}

.page-faq .qa__panel p {
  margin: 0 0 10px;
}

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

/* ---------- 支持区 ---------- */
.page-faq .support-grid {
  margin-top: clamp(22px, 3vw, 32px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-faq .support-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--ink-700);
  border-radius: var(--r-md);
  background: var(--ink-900);
  color: var(--slate-300);
  text-decoration: none;
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-faq a.support-card:hover {
  border-color: var(--cyan-400);
  transform: translateY(-3px);
}

.page-faq .support-card--solid {
  background: linear-gradient(150deg, var(--orange-500) 0%, #ff9d63 92%);
  border-color: transparent;
  color: #2a1200;
}

.page-faq .support-card__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.82;
}

.page-faq .support-card__value {
  font-size: var(--t-md);
  line-height: 1.4;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: inherit;
  word-break: break-word;
}

.page-faq .support-card__hint {
  font-size: var(--t-xs);
  line-height: 1.7;
  opacity: 0.8;
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-faq .fact-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 760px) {
  .page-faq .support-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(250px, 0.9fr);
    align-items: end;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--topbar-h) + 22px);
    padding: 18px 14px 18px;
    background: var(--faq-glass);
  }

  .page-faq .faq-index__list {
    grid-auto-flow: row;
    grid-auto-columns: auto;
    overflow: visible;
    gap: 3px;
  }

  .page-faq .faq-index__list a {
    border: 0;
    border-left: 2px solid transparent;
    border-radius: var(--r-sm);
    padding: 9px 12px 9px 11px;
  }

  .page-faq .faq-index__list a[aria-current="true"] {
    border-left-color: var(--lime-400);
    background: rgba(37, 214, 232, 0.1);
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-section__intro {
    font-size: var(--t-md);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa::before,
  .page-faq .qa .fold__mark::before,
  .page-faq .qa .fold__mark::after,
  .page-faq .support-card {
    transition-duration: 0.01ms;
  }
}
<<<END>>>