.page-faq {
  --faq-axis-w: 208px;
  --faq-shell-gap: clamp(24px, 4vw, 56px);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  max-width: 46rem;
  padding-block: clamp(26px, 5vw, 60px) clamp(18px, 3vw, 30px);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-cond);
  font-size: clamp(1.85rem, 6.2vw, 3.4rem);
  line-height: 1.16;
  letter-spacing: 0.045em;
  color: var(--stone);
  margin: 14px 0 16px;
}

.page-faq .faq-hero .lede {
  max-width: 34em;
  color: var(--silver);
  margin: 0;
}

.page-faq .faq-figures {
  display: flex;
  flex-wrap: wrap;
  gap: 14px clamp(18px, 4vw, 48px);
  list-style: none;
  margin: 0;
  padding: 0 0 clamp(26px, 5vw, 54px);
}

.page-faq .faq-figures li {
  min-width: 96px;
}

.page-faq .faq-figures__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.15rem, 3.4vw, 1.5rem);
  letter-spacing: 0.02em;
  color: var(--amber);
}

.page-faq .faq-figures__label {
  display: block;
  margin-top: 3px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

/* ---------- 分类轴 + 问答画布 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: var(--faq-shell-gap);
  padding-bottom: clamp(36px, 6vw, 88px);
}

.page-faq .faq-axis {
  border-top: 1px solid var(--line-strong);
  padding-top: 16px;
}

.page-faq .faq-axis__title {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--gold);
  margin: 0 0 12px;
}

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

.page-faq .faq-axis__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(27, 53, 87, 0.5);
  color: var(--silver);
  font-size: 14px;
  text-decoration: none;
  transition: border-color 0.25s ease, color 0.25s ease, background 0.25s ease;
}

.page-faq .faq-axis__link:hover,
.page-faq .faq-axis__link:focus-visible {
  border-color: rgba(242, 169, 59, 0.62);
  background: rgba(242, 169, 59, 0.1);
  color: var(--stone);
}

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

.page-faq .faq-canvas {
  min-width: 0;
}

/* ---------- 问答分组 ---------- */
.page-faq .qa-group + .qa-group {
  margin-top: clamp(38px, 5.5vw, 76px);
}

.page-faq .qa-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .qa-group__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--gold);
  flex: none;
}

.page-faq .qa-group__title {
  font-family: var(--font-cond);
  font-size: clamp(1.35rem, 3.4vw, 2rem);
  line-height: 1.25;
  letter-spacing: 0.04em;
  color: var(--stone);
  margin: 0;
}

.page-faq .qa-group__note {
  margin: 14px 0 6px;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  border-bottom: 1px solid var(--line);
}

.page-faq .qa__q {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 18px 0;
  list-style: none;
  cursor: pointer;
  font-size: clamp(15px, 1.7vw, 16.5px);
  line-height: 1.6;
  color: var(--stone);
  transition: color 0.2s ease;
}

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

.page-faq .qa__q::marker {
  content: "";
}

.page-faq .qa__q:hover,
.page-faq .qa__q:focus-visible {
  color: var(--amber);
}

.page-faq .qa__sign {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 5px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  color: var(--silver);
  transition: border-color 0.25s ease, color 0.25s ease;
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: currentColor;
  transform: translate(-50%, -50%);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.page-faq .qa__sign::before {
  width: 7px;
  height: 1px;
}

.page-faq .qa__sign::after {
  width: 1px;
  height: 7px;
}

.page-faq .qa[open] .qa__sign {
  border-color: var(--jade);
  color: var(--jade);
}

.page-faq .qa[open] .qa__sign::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-faq .qa__body {
  margin: 0 0 4px 34px;
  padding: 0 0 20px 18px;
  border-left: 2px solid var(--line);
  color: var(--silver);
  font-size: 15.5px;
  line-height: 1.8;
  transition: border-color 0.3s ease;
}

.page-faq .qa[open] .qa__body {
  border-left-color: var(--jade);
}

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

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

.page-faq .qa__body a,
.page-faq .faq-step__link {
  color: var(--jade);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .qa__body a:hover,
.page-faq .faq-step__link:hover {
  color: var(--amber);
}

/* ---------- 文档区 ---------- */
.page-faq .doc-media {
  margin: clamp(20px, 4vw, 34px) 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ink-3);
}

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

.page-faq .savecard {
  position: relative;
  margin: clamp(20px, 4vw, 34px) 0;
  padding: clamp(22px, 4vw, 34px);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(79, 179, 166, 0.42);
  background: linear-gradient(148deg, rgba(79, 179, 166, 0.16), rgba(27, 53, 87, 0.6) 60%, rgba(11, 26, 46, 0.92));
  overflow: hidden;
}

.page-faq .savecard::after {
  content: "";
  position: absolute;
  top: -45%;
  right: -18%;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79, 179, 166, 0.38), transparent 68%);
  pointer-events: none;
}

.page-faq .savecard > * {
  position: relative;
  z-index: 1;
}

.page-faq .savecard__title {
  font-family: var(--font-cond);
  font-size: clamp(1.2rem, 3vw, 1.65rem);
  line-height: 1.3;
  letter-spacing: 0.04em;
  color: var(--stone);
  margin: 12px 0 10px;
}

.page-faq .savecard__text {
  margin: 0 0 14px;
  max-width: 34em;
  color: var(--silver);
  font-size: 15.5px;
  line-height: 1.8;
}

.page-faq .savecard__meta {
  margin: 0 0 18px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--slate);
}

.page-faq .mono {
  font-family: var(--font-mono);
  color: var(--jade);
}

.page-faq .savecard__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

/* ---------- 三步指南 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(22px, 4vw, 38px);
}

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

.page-faq .faq-step {
  border-top: 1px solid var(--line-strong);
  padding: 20px 0 24px;
}

.page-faq .faq-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-faq .faq-step__title {
  font-family: var(--font-cond);
  font-size: clamp(1.05rem, 2.6vw, 1.32rem);
  line-height: 1.35;
  letter-spacing: 0.035em;
  color: var(--stone);
  margin: 9px 0 8px;
}

.page-faq .faq-step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

.page-faq .faq-steps__figure {
  margin: 0 auto;
  max-width: 380px;
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ink-3);
}

/* ---------- 联络 ---------- */
.page-faq .assist-grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(22px, 4vw, 36px);
}

.page-faq .prep__heading {
  font-family: var(--font-cond);
  font-size: clamp(1.05rem, 2.6vw, 1.3rem);
  letter-spacing: 0.04em;
  color: var(--silver);
  margin: 0 0 14px;
}

.page-faq .prep__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .prep__item {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.page-faq .prep__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--amber);
  padding-top: 3px;
}

.page-faq .prep__title {
  margin: 0 0 4px;
  font-size: 15.5px;
  font-weight: 500;
  color: var(--stone);
}

.page-faq .prep__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--slate);
}

.page-faq .channels {
  display: grid;
  gap: 2px;
}

.page-faq .channel {
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.page-faq .channel__label {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-faq .channel__row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.page-faq .channel__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(0.9rem, 2.4vw, 1.05rem);
  color: var(--stone);
  word-break: break-word;
}

.page-faq .channel__value--plain {
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--silver);
}

.page-faq .assist-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 22px;
  align-items: center;
  margin: clamp(26px, 4vw, 40px) 0 0;
}

.page-faq .assist-cta__link {
  color: var(--silver);
  font-size: 14.5px;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .assist-cta__link:hover {
  color: var(--amber);
}

/* ---------- 锚点定位 ---------- */
.page-faq #q-register,
.page-faq #q-version,
.page-faq #q-docs,
.page-faq #q-steps,
.page-faq #q-assist {
  scroll-margin-top: 96px;
}

/* ---------- 桌面 ---------- */
@media (min-width: 920px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-axis-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-axis {
    position: sticky;
    top: 98px;
    border-top: 0;
    border-left: 1px solid var(--line-strong);
    padding: 0 0 0 18px;
  }

  .page-faq .faq-axis__title {
    margin-bottom: 14px;
  }

  .page-faq .faq-axis__list {
    flex-direction: column;
    gap: 2px;
  }

  .page-faq .faq-axis__link {
    width: 100%;
    border-color: transparent;
    border-radius: 12px;
    background: transparent;
    padding: 10px 12px;
  }

  .page-faq .faq-axis__link:hover,
  .page-faq .faq-axis__link:focus-visible {
    border-color: rgba(242, 169, 59, 0.45);
  }
}

@media (min-width: 860px) {
  .page-faq .faq-steps__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 clamp(18px, 2.6vw, 34px);
  }
}

@media (min-width: 780px) {
  .page-faq .assist-grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-faq .qa-group__note {
    max-width: 44em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__sign,
  .page-faq .qa__sign::before,
  .page-faq .qa__sign::after,
  .page-faq .qa__body,
  .page-faq .faq-axis__link {
    transition: none;
  }
}