.page-faq {
  --faq-sheen: rgba(0, 229, 255, 0.08);
  --faq-violet-veil: rgba(108, 92, 231, 0.2);
  position: relative;
  color: var(--text);
  font-family: var(--font-body);
  background:
    radial-gradient(1100px 520px at 90% -10%, var(--faq-violet-veil), transparent 62%),
    radial-gradient(760px 420px at 4% 14%, var(--faq-sheen), transparent 60%),
    var(--ink);
  overflow-x: clip;
}

.page-faq h1,
.page-faq h2,
.page-faq h3 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--white);
  margin: 0;
}

.page-faq h1 {
  font-size: clamp(32px, 6.2vw, 62px);
  line-height: 1.06;
  margin-top: 14px;
}

.page-faq h2 {
  font-size: clamp(21px, 3vw, 31px);
  line-height: 1.2;
}

.page-faq p {
  margin: 0;
}

.page-faq .kb-wrap {
  max-width: 1480px;
  margin-inline: auto;
  padding-inline: var(--gutter);
  padding-inline-start: calc(var(--rail-w) + var(--gutter));
  padding-bottom: clamp(40px, 6vw, 88px);
}

.page-faq .breadcrumb {
  padding-top: clamp(18px, 2.4vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-faq .kb-hero {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  padding-block: clamp(20px, 3.4vw, 44px) clamp(26px, 4vw, 56px);
}

.page-faq .kb-hero__lede {
  margin-top: 18px;
  max-width: 60ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--haze);
}

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

.page-faq .kb-hero__board {
  padding: 20px 20px 22px;
  background: linear-gradient(165deg, rgba(18, 32, 46, 0.96), rgba(12, 20, 36, 0.96));
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--cyan);
  border-radius: var(--radius);
}

.page-faq .kb-hero__board-title {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-faq .kb-facts {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .kb-facts li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line-soft);
}

.page-faq .kb-facts li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .kb-facts__key {
  font-size: 14px;
  color: var(--haze);
  letter-spacing: 0.02em;
}

.page-faq .kb-facts__val {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--white);
  white-space: nowrap;
}

.page-faq .kb-hero__board-note {
  margin-top: 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--haze);
}

/* ---------- 通用分区 ---------- */
.page-faq .kb-block {
  padding-block: clamp(28px, 4.4vw, 60px);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 主题树 + 高频问题 ---------- */
.page-faq .kb-index__grid {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
}

.page-faq .kb-tree {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 18px 18px 20px;
  background: rgba(12, 20, 36, 0.72);
}

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

.page-faq .kb-tree__list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 10px 11px 8px;
  border-left: 2px solid transparent;
  color: var(--text);
  font-size: 15px;
  text-decoration: none;
  transition: border-color 0.22s var(--ease), background 0.22s var(--ease), color 0.22s var(--ease);
}

.page-faq .kb-tree__list .mono {
  font-size: 12px;
  color: var(--cyan);
  letter-spacing: 0.08em;
}

.page-faq .kb-tree__list a:hover,
.page-faq .kb-tree__list a:focus-visible {
  border-left-color: var(--cyan);
  background: rgba(0, 229, 255, 0.07);
  color: var(--white);
}

.page-faq .kb-tree__note {
  margin-top: 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--haze);
}

.page-faq .kb-hot__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .kb-hot__list a {
  display: block;
  position: relative;
  padding: 15px 18px 15px 22px;
  font-size: 15px;
  line-height: 1.55;
  color: var(--text);
  text-decoration: none;
  background: var(--ink-2);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  transition: border-color 0.22s var(--ease), color 0.22s var(--ease), background 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-faq .kb-hot__list a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: var(--mint);
  transform: scaleY(0.4);
  transform-origin: center;
  transition: transform 0.24s var(--ease), background 0.24s var(--ease);
}

.page-faq .kb-hot__list a:hover,
.page-faq .kb-hot__list a:focus-visible {
  border-color: var(--line);
  background: var(--card);
  color: var(--white);
  transform: translateX(3px);
}

.page-faq .kb-hot__list a:hover::before,
.page-faq .kb-hot__list a:focus-visible::before {
  transform: scaleY(1);
  background: var(--cyan);
}

/* ---------- 问答组 ---------- */
.page-faq .kb-group {
  margin-top: clamp(24px, 3vw, 38px);
}

.page-faq .kb-group__title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: clamp(17px, 2vw, 21px);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 14px;
}

.page-faq .kb-group__title .mono {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .qa {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: rgba(12, 20, 36, 0.78);
  transition: border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-faq .qa + .qa {
  margin-top: 10px;
}

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

.page-faq .qa[open] {
  border-color: var(--line);
  background: var(--card);
}

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 16px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--text);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa[open] summary {
  color: var(--white);
  border-bottom: 1px solid var(--line-soft);
}

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

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 0.24s var(--ease), opacity 0.24s var(--ease);
}

.page-faq .qa__sign::before {
  left: 0;
  right: 0;
  top: 6px;
  height: 2px;
}

.page-faq .qa__sign::after {
  top: 0;
  bottom: 0;
  left: 6px;
  width: 2px;
}

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

.page-faq .qa__body {
  padding: 14px 16px 18px;
}

.page-faq .qa__body p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--haze);
  max-width: 68ch;
}

/* ---------- 小屏步骤 ---------- */
.page-faq .kb-steps__lede,
.page-faq .kb-terms__lede {
  margin-top: 12px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--haze);
}

.page-faq .kb-steps__grid {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  margin-top: clamp(20px, 3vw, 30px);
}

.page-faq .kb-steps__fig {
  margin: 0;
}

.page-faq .kb-steps__fig .media-frame {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
}

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

.page-faq .kb-steps__fig figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--haze);
}

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

.page-faq .kb-steps__list li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.06), transparent 55%), var(--ink-2);
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-faq .kb-steps__list li:hover {
  border-color: var(--line);
  transform: translateY(-2px);
}

.page-faq .kb-steps__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 30px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ink);
  background: var(--cyan);
  border-radius: var(--radius);
}

.page-faq .kb-steps__list h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.page-faq .kb-steps__list p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--haze);
}

/* ---------- 术语 ---------- */
.page-faq .kb-terms__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-faq .term {
  padding: 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(18, 32, 46, 0.95), rgba(12, 20, 36, 0.95));
  transition: border-color 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-faq .term:hover,
.page-faq .term:focus-within {
  border-color: var(--cyan);
  transform: translateY(-3px);
}

.page-faq .term h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.page-faq .term p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--haze);
}

.page-faq .term__eg {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--line-soft);
  font-size: 13px;
  color: var(--haze);
}

.page-faq .term__eg .mono {
  display: inline-block;
  margin-right: 6px;
  padding: 1px 6px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink);
  background: var(--mint);
  border-radius: var(--radius);
}

.page-faq .term:hover .term__eg {
  color: var(--text);
}

.page-faq .kb-terms__fig {
  margin: clamp(22px, 3vw, 32px) 0 0;
}

.page-faq .kb-terms__fig .media-frame {
  border: 1px solid var(--line-soft);
  border-top: 2px solid transparent;
  border-image: linear-gradient(90deg, var(--violet), var(--azure)) 1;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
}

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

.page-faq .kb-terms__fig figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--haze);
}

/* ---------- 联系引导 ---------- */
.page-faq .kb-help__card {
  padding: clamp(22px, 3.4vw, 40px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(600px 260px at 100% 0%, rgba(255, 77, 61, 0.16), transparent 62%),
    radial-gradient(520px 260px at 0% 100%, rgba(0, 229, 255, 0.12), transparent 60%),
    var(--ink-2);
}

.page-faq .kb-help__text {
  margin-top: 12px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--haze);
}

.page-faq .kb-help__contact {
  display: grid;
  gap: 8px;
  margin-top: 20px;
}

.page-faq .kb-help__contact .contact-line {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: baseline;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--white);
}

.page-faq .kb-help__contact .contact-line__key {
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-faq .kb-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .kb-hot__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .kb-terms__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .kb-hero {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .kb-steps__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-faq .kb-index__grid {
    grid-template-columns: 250px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .kb-tree {
    position: sticky;
    top: calc(var(--topbar-h) + 16px);
  }

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

@media (min-width: 1200px) {
  .page-faq .kb-hot__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .page-faq .qa summary {
    padding: 17px 20px;
    font-size: 16px;
  }

  .page-faq .qa__body {
    padding: 16px 20px 20px;
  }
}
<<<END>>>