.page-faq {
  --faq-pad: clamp(16px, 2.4vw, 28px);
  --faq-shadow: 8px 8px 0 rgba(17, 21, 19, .85);
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(20px, 3.4vw, 44px) 0 clamp(8px, 1.6vw, 18px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 44px);
  align-items: end;
}

.page-faq .faq-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 5.6vw, 68px);
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--c-chalk);
  text-wrap: balance;
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 40ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--ink-dim);
}

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

.page-faq .faq-hero__media {
  position: relative;
  margin: 0;
  padding: 8px;
  border: 1px solid var(--line);
  background: var(--c-tunnel);
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 4;
  object-fit: cover;
  filter: saturate(.88) contrast(1.04);
}

.page-faq .faq-hero__media .media__caption {
  padding: 10px 4px 2px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ink-mute);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  padding: clamp(26px, 4.4vw, 56px) 0 clamp(40px, 6vw, 84px);
}

.page-faq .faq-toc {
  min-width: 0;
  padding: 18px 16px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--c-signal);
  background: linear-gradient(180deg, rgba(30, 58, 49, .92), rgba(11, 31, 26, .92));
}

.page-faq .faq-toc__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--c-signal-soft);
}

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

.page-faq .faq-toc__link {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  align-items: baseline;
  gap: 8px;
  padding: 10px 8px;
  border-radius: var(--r);
  color: var(--ink-dim);
  font-size: 15px;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  background: rgba(53, 240, 176, .1);
  color: var(--c-chalk);
  padding-left: 13px;
}

.page-faq .faq-toc__no {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-signal);
}

.page-faq .faq-toc__foot {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-mute);
}

.page-faq .faq-toc__foot a {
  color: var(--c-signal-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 答案列 ---------- */
.page-faq .faq-answers {
  display: grid;
  gap: clamp(30px, 4.4vw, 58px);
  min-width: 0;
}

.page-faq .faq-block {
  scroll-margin-top: 96px;
  padding-top: clamp(20px, 2.8vw, 32px);
  border-top: 1px solid var(--line-strong);
}

.page-faq .faq-answers > .faq-block:first-child {
  padding-top: 0;
  border-top: none;
}

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

.page-faq .faq-block__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.1vw, 38px);
  line-height: 1.15;
  letter-spacing: -.01em;
  color: var(--c-chalk);
}

.page-faq .faq-block__scene {
  margin: 10px 0 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-dim);
}

/* ---------- 问答单元 ---------- */
.page-faq .qa {
  margin-top: clamp(18px, 2.6vw, 28px);
  padding: clamp(16px, 2.2vw, 24px);
  border: 1px solid var(--line);
  background: rgba(30, 58, 49, .38);
  min-width: 0;
}

.page-faq .qa__q {
  margin: 0;
  font-size: clamp(16px, 1.7vw, 19px);
  font-weight: 700;
  line-height: 1.55;
  color: var(--c-chalk);
}

.page-faq .qa__q::before {
  content: "Q";
  margin-right: 9px;
  font-family: var(--font-mono);
  font-size: .86em;
  color: var(--c-ember);
}

/* ---------- 编号步骤 ---------- */
.page-faq .steps {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.page-faq .steps__item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  padding: 12px 8px 12px 0;
  border-top: 1px solid var(--line);
  transition: background var(--dur) var(--ease);
}

.page-faq .steps__item:last-child {
  border-bottom: 1px solid var(--line);
}

.page-faq .steps__item:hover,
.page-faq .steps__item:focus-within {
  background: rgba(53, 240, 176, .07);
}

.page-faq .steps__no {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.95;
  color: var(--c-signal);
  transition: color var(--dur) var(--ease);
}

.page-faq .steps__item:hover .steps__no {
  color: var(--c-signal-soft);
}

.page-faq .steps__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-dim);
}

.page-faq .steps__text a {
  color: var(--c-signal-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 提示条 ---------- */
.page-faq .hint {
  margin: 16px 0 0;
  padding: 12px 16px;
  border-left: 3px solid var(--c-signal);
  background: linear-gradient(90deg, rgba(53, 240, 176, .13), rgba(53, 240, 176, 0) 78%);
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-dim);
}

/* ---------- 版本对照 ---------- */
.page-faq .versions-grid {
  display: grid;
  gap: clamp(18px, 2.6vw, 30px);
  margin-top: clamp(20px, 2.6vw, 30px);
}

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

.page-faq .switch__bar {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  background: var(--c-tunnel);
  border-radius: var(--r);
}

.page-faq .switch__btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--ink-dim);
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: .04em;
  padding: 8px 20px;
  border-radius: var(--r);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .switch__btn:hover {
  color: var(--c-chalk);
}

.page-faq .switch__btn[aria-pressed="true"] {
  background: var(--c-signal);
  color: var(--c-night);
}

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

.page-faq .switch__panel {
  margin-top: 16px;
  padding: clamp(16px, 2.2vw, 24px);
  border: 1px solid var(--line);
  border-top: 3px solid var(--c-signal);
  background: rgba(30, 58, 49, .42);
}

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

.page-faq .switch__lead {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-dim);
}

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

.page-faq .facts li {
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-dim);
}

.page-faq .facts li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: .82em;
  width: 10px;
  height: 2px;
  background: var(--c-ember);
}

.page-faq .versions-figure {
  margin: 0;
  padding: 8px;
  border: 1px solid var(--line);
  background: var(--c-tunnel);
}

.page-faq .versions-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  filter: saturate(.85);
}

.page-faq .versions-figure .media__caption {
  padding: 10px 4px 2px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ink-mute);
}

/* ---------- 底部联系 ---------- */
.page-faq .faq-help {
  padding: clamp(34px, 5vw, 64px) 0 clamp(40px, 6vw, 80px);
  border-top: 1px solid var(--line-strong);
  background: linear-gradient(180deg, rgba(11, 31, 26, 0), rgba(17, 21, 19, .9));
}

.page-faq .faq-help__inner {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
}

.page-faq .faq-help__text h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.2vw, 40px);
  line-height: 1.15;
  letter-spacing: -.01em;
  color: var(--c-chalk);
}

.page-faq .faq-help__text p {
  margin: 14px 0 0;
  max-width: 42ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-dim);
}

.page-faq .faq-help__text .btn {
  margin-top: 24px;
}

.page-faq .faq-help__list {
  margin: 0;
  padding: 0;
  border: 1px solid var(--line);
  background: rgba(30, 58, 49, .35);
}

.page-faq .faq-help__row {
  display: grid;
  gap: 4px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-help__row:last-child {
  border-bottom: none;
}

.page-faq .faq-help__row dt {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--c-steel);
}

.page-faq .faq-help__row dd {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--c-chalk);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .versions-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 880px) {
  .page-faq .faq-help__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-help__row {
    padding: 16px 22px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }

  .page-faq .faq-body {
    grid-template-columns: 246px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 92px;
    padding: 22px 18px 24px;
  }
}

@media (max-width: 480px) {
  .page-faq .steps__item {
    grid-template-columns: 34px minmax(0, 1fr);
  }

  .page-faq .qa {
    padding: 14px 13px;
  }

  .page-faq .switch__btn {
    padding: 8px 14px;
    font-size: 13px;
  }
}