.page-faq {
  --faq-radius: var(--r);
  --faq-pad: 16px;
  display: block;
  padding-bottom: 72px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 22px 0 40px;
  background: linear-gradient(135deg, rgba(12, 42, 34, 0.92) 0%, rgba(47, 232, 198, 0.14) 62%, rgba(6, 18, 15, 0) 100%);
  border-bottom: var(--bw) solid var(--line);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 26px;
  margin-top: 18px;
}

.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 8vw, 62px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 10px 0 16px;
  max-width: 20ch;
}

.page-faq .faq-hero__lede {
  font-size: var(--fs-16);
  line-height: 1.75;
  color: var(--mist);
  max-width: 56ch;
  margin: 0 0 22px;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-hero__frame {
  display: block;
  margin: 0;
  aspect-ratio: 3 / 4;
  border: var(--bw) solid var(--line);
  border-radius: var(--faq-radius);
  overflow: hidden;
  box-shadow: var(--shadow-slab);
}

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

/* ---------- 步骤索引 ---------- */
.page-faq .faq-index {
  border-bottom: var(--bw) solid var(--line);
  background: var(--pine);
  padding: 8px 0;
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  list-style: none;
  margin: 0;
  padding: 4px 0;
  scrollbar-width: none;
}

.page-faq .faq-index__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--white);
  text-decoration: none;
  font-size: var(--fs-14);
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  outline: none;
}

.page-faq .faq-index__num {
  font-family: var(--font-num);
  font-size: var(--fs-12);
  color: var(--cyan);
}

/* ---------- 区块通用 ---------- */
.page-faq .faq-block {
  padding: 56px 0 0;
  scroll-margin-top: 96px;
}

.page-faq .faq-block--last {
  padding-bottom: 8px;
}

.page-faq .faq-steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-step {
  border: var(--bw) solid var(--line);
  border-left: 4px solid var(--cyan-edge, var(--line));
  border-radius: var(--faq-radius);
  background: var(--pine);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-faq .faq-step:hover {
  border-color: var(--cyan-edge);
  transform: translateY(-2px);
}

.page-faq .faq-step__head {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 15px 16px;
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

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

.page-faq .faq-step__badge {
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-size: var(--fs-14);
  letter-spacing: 0.04em;
  color: var(--ink);
  background: var(--cyan);
  padding: 3px 8px;
  border-radius: var(--faq-radius);
}

.page-faq .faq-step__title {
  flex: 1 1 auto;
  font-size: var(--fs-16);
  font-weight: 700;
  line-height: 1.5;
}

.page-faq .faq-step__cue {
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-size: var(--fs-12);
  color: var(--mist);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px 9px;
}

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

.page-faq .faq-step__panel p {
  margin: 14px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--cyan);
  font-size: var(--fs-16);
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-step__head[aria-expanded="false"] + .faq-step__panel {
  display: none;
}

/* ---------- 收藏章节 ---------- */
.page-faq .faq-save__banner {
  margin: 0 0 30px;
  aspect-ratio: 2 / 1;
  border: var(--bw) solid var(--line);
  border-radius: var(--faq-radius);
  overflow: hidden;
  box-shadow: var(--shadow-slab);
}

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

.page-faq .faq-save__grid {
  display: grid;
  gap: 22px;
  margin-top: 26px;
}

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

.page-faq .faq-point__title {
  margin: 0 0 8px;
  font-size: var(--fs-20);
  font-weight: 700;
  line-height: 1.4;
}

.page-faq .faq-point p {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-save__demo {
  padding: 20px;
  border: var(--bw) solid var(--line);
  border-radius: var(--faq-radius);
  background: var(--pine);
  align-self: start;
}

.page-faq .faq-save__demo-label {
  margin: 0 0 14px;
  font-family: var(--font-num);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--cyan);
}

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

.page-faq .faq-save__demo-note {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 对照表读法 ---------- */
.page-faq .faq-read__grid {
  display: grid;
  gap: 26px;
  margin-top: 28px;
}

.page-faq .faq-chart {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: var(--bw) solid var(--line);
  border-radius: var(--faq-radius);
  background: var(--pine);
  padding: 12px;
  box-sizing: border-box;
}

.page-faq .faq-chart__axis {
  stroke: var(--mist);
  stroke-width: 2;
}

.page-faq .faq-chart__grid-line {
  stroke: var(--line);
  stroke-width: 2;
  stroke-dasharray: 6 8;
}

.page-faq .faq-chart__bar--a {
  fill: var(--cyan);
  opacity: 0.85;
}

.page-faq .faq-chart__bar--b {
  fill: var(--mist);
  opacity: 0.55;
}

.page-faq .faq-chart__rail {
  fill: var(--line);
}

.page-faq .faq-chart__rail-fill {
  fill: var(--amber);
}

.page-faq .faq-chart__tick {
  stroke: var(--cyan);
  stroke-width: 2;
}

.page-faq .faq-chart__label {
  fill: var(--mist);
  font-family: var(--font-num);
  font-size: 15px;
}

.page-faq .faq-read__legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-faq .faq-read__item {
  display: grid;
  grid-template-columns: 14px 1fr;
  gap: 14px;
  align-items: start;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-read__item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-read__swatch {
  display: block;
  width: 14px;
  height: 14px;
  margin-top: 6px;
  border-radius: 2px;
}

.page-faq .faq-read__swatch--cyan {
  background: var(--cyan);
}

.page-faq .faq-read__swatch--mist {
  background: var(--mist);
}

.page-faq .faq-read__swatch--rail {
  background: var(--amber);
}

.page-faq .faq-read__swatch--gold {
  background: var(--gold);
}

.page-faq .faq-read__item-title {
  margin: 0 0 6px;
  font-size: var(--fs-16);
  font-weight: 700;
}

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

.page-faq .faq-read__cta {
  margin-top: 28px;
}

/* ---------- 历史回翻 ---------- */
.page-faq .faq-history__grid {
  display: grid;
  gap: 28px;
  margin-top: 28px;
}

.page-faq .faq-history__lede {
  margin: 0 0 22px;
  font-size: var(--fs-16);
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-history__aside {
  padding: 22px 20px;
  border: var(--bw) solid var(--line);
  border-radius: var(--faq-radius);
  background: var(--pine);
  align-self: start;
}

.page-faq .faq-history__aside-num {
  font-family: var(--font-num);
  font-size: 64px;
  line-height: 1;
  color: var(--cyan);
  display: block;
  margin-bottom: 6px;
}

.page-faq .faq-history__aside-label {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--white);
}

.page-faq .faq-history__aside .slash-rule {
  margin: 18px 0;
}

.page-faq .faq-history__aside-note {
  margin: 0 0 16px;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 设备适配 ---------- */
.page-faq .faq-device__grid {
  display: grid;
  gap: 18px;
  margin-top: 28px;
}

.page-faq .faq-device__card {
  padding: 22px 20px;
  border: var(--bw) solid var(--line);
  border-radius: var(--faq-radius);
  background: var(--pine);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-faq .faq-device__card:hover {
  transform: translateY(-2px);
  border-color: var(--cyan-edge);
}

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

.page-faq .faq-device__title {
  margin: 0 0 14px;
  font-size: var(--fs-20);
  font-weight: 700;
}

.page-faq .faq-device__list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 10px;
}

.page-faq .faq-device__list li {
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-device__note {
  margin-top: 22px;
  padding: 22px 20px;
  border: var(--bw) solid var(--line);
  border-left: 4px solid var(--cyan);
  border-radius: var(--faq-radius);
  background: var(--pine);
}

.page-faq .faq-device__note-title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: var(--fs-20);
  font-weight: 700;
}

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

/* ---------- 排查与求助 ---------- */
.page-faq .faq-help__grid {
  display: grid;
  gap: 26px;
  margin-top: 28px;
}

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

.page-faq .faq-help__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  padding: 16px;
  border: var(--bw) solid var(--line);
  border-radius: var(--faq-radius);
  background: var(--pine);
}

.page-faq .faq-help__num {
  font-family: var(--font-num);
  font-size: var(--fs-14);
  color: var(--cyan);
  padding-top: 3px;
}

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

.page-faq .faq-help__item strong {
  color: var(--white);
}

.page-faq .faq-help__contact {
  padding: 24px 20px;
  border: var(--bw) solid var(--line);
  border-radius: var(--faq-radius);
  background: linear-gradient(160deg, rgba(12, 42, 34, 0.95) 0%, rgba(47, 232, 198, 0.08) 100%);
  align-self: start;
}

.page-faq .faq-help__contact-label {
  margin: 0 0 8px;
  font-family: var(--font-num);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--amber);
}

.page-faq .faq-help__contact-title {
  margin: 0 0 12px;
  font-size: var(--fs-28);
  font-weight: 900;
  letter-spacing: -0.01em;
}

.page-faq .faq-help__contact-note {
  margin: 0 0 16px;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-help__contact-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-help__contact-list li {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 10px;
  align-items: baseline;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-help__contact-key {
  font-size: var(--fs-12);
  color: var(--mist);
}

.page-faq .faq-help__contact-val {
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--white);
  text-decoration: none;
  word-break: break-all;
}

.page-faq a.faq-help__contact-val {
  border-bottom: 1px solid var(--cyan-edge);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

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

.page-faq .faq-help__contact-val--plain {
  color: var(--mist);
}

.page-faq .faq-help__back {
  margin: 32px 0 0;
  font-size: var(--fs-14);
  color: var(--mist);
}

.page-faq .faq-help__back a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-edge);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-index__link {
    padding: 8px 15px;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 32px;
  }
}

@media (min-width: 880px) {
  .page-faq .faq-hero {
    padding: 34px 0 56px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: 46px;
    margin-top: 26px;
  }

  .page-faq .faq-hero__title {
    max-width: 16ch;
  }

  .page-faq .faq-block {
    padding: 76px 0 0;
  }

  .page-faq .faq-save__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 34px;
    margin-top: 30px;
  }

  .page-faq .faq-read__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 36px;
    align-items: start;
  }

  .page-faq .faq-history__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: 36px;
    align-items: start;
  }

  .page-faq .faq-device__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .page-faq .faq-save__demo {
    padding: 26px 24px;
  }

  .page-faq .faq-history__aside {
    padding: 28px 24px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-hero__frame {
    aspect-ratio: 4 / 5;
  }

  .page-faq .faq-index__list {
    justify-content: flex-start;
    gap: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step,
  .page-faq .faq-device__card {
    transition: none;
    transform: none;
  }
}