/* ===== 常见问题页 ===== */
.page-faq {
  --faq-rule: rgba(224, 167, 60, 0.24);
  --faq-rule-cool: rgba(124, 147, 184, 0.22);
  background: var(--sm-ink);
  color: var(--sm-body);
  overflow-x: hidden;
}

.page-faq .sm-crumb {
  padding-block: 18px 4px;
}

.page-faq .sm-crumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--sm-blue);
}

.page-faq .sm-crumb__sep {
  color: #3E3850;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-block: 36px 60px;
  background:
    radial-gradient(118% 78% at 8% -12%, rgba(58, 30, 92, 0.92) 0%, rgba(11, 10, 18, 0) 60%),
    var(--sm-ink);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--sm-gold) 0%, rgba(224, 167, 60, 0.05) 62%, transparent 100%);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-bottom: 26px;
}

.page-faq .faq-hero__title {
  margin: 0 0 22px;
  font-family: var(--sm-font-display);
  font-size: clamp(46px, 13vw, 138px);
  font-weight: 900;
  line-height: 0.92;
  letter-spacing: -0.035em;
  color: var(--sm-bright);
}

.page-faq .faq-hero__lede {
  max-width: 58ch;
  margin: 0 0 36px;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--sm-body);
}

.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--sm-line);
  border-block: 1px solid var(--sm-line);
}

.page-faq .faq-hero__fact {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 4px;
  background: var(--sm-ink);
}

.page-faq .faq-hero__factKey {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--sm-blue);
}

.page-faq .faq-hero__factVal {
  font-family: var(--sm-font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--sm-gold);
  letter-spacing: -0.01em;
}

/* ---------- 通用区块 ---------- */
.page-faq .faq-block {
  padding-block: 56px;
  border-top: 1px solid var(--sm-line);
}

.page-faq .faq-block__head {
  max-width: 68ch;
  margin-bottom: 34px;
}

.page-faq .faq-block__head .sm-label {
  display: inline-block;
  margin-bottom: 18px;
}

.page-faq .faq-block__head .sm-title {
  margin: 0 0 16px;
  font-size: clamp(26px, 5vw, 40px);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--sm-bright);
}

.page-faq .faq-prose {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--sm-body);
}

.page-faq .faq-table__cap {
  padding: 0 0 14px;
  text-align: left;
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--sm-blue);
}

/* ---------- 三项验收 ---------- */
.page-faq .faq-accept__figure {
  margin: 0 0 34px;
}

.page-faq .faq-check {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-check__item {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-check__label {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 14px 18px;
  align-items: start;
  padding: 22px 2px;
  cursor: pointer;
}

.page-faq .faq-check__box {
  appearance: none;
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  margin: 2px 0 0;
  border: 1px solid var(--faq-rule);
  background: transparent;
  display: grid;
  place-content: center;
  cursor: pointer;
  transition: border-color 160ms ease, background-color 160ms ease;
}

.page-faq .faq-check__box::before {
  content: "";
  width: 10px;
  height: 10px;
  background: var(--sm-gold);
  transform: scale(0);
  transition: transform 160ms ease;
}

.page-faq .faq-check__box:checked {
  border-color: var(--sm-gold);
  background: rgba(224, 167, 60, 0.1);
}

.page-faq .faq-check__box:checked::before {
  transform: scale(1);
}

.page-faq .faq-check__box:focus-visible {
  outline: 2px solid var(--sm-status);
  outline-offset: 3px;
}

.page-faq .faq-check__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 9px;
}

.page-faq .faq-check__key {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--sm-bright);
}

.page-faq .faq-check__value {
  font-family: var(--sm-font-mono);
  font-size: clamp(22px, 6vw, 30px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--sm-gold);
}

.page-faq .faq-check__note {
  max-width: 62ch;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--sm-body);
}

/* ---------- 四类问题 ---------- */
.page-faq .faq-paths {
  background:
    radial-gradient(96% 60% at 92% 0%, rgba(58, 30, 92, 0.55) 0%, rgba(35, 18, 53, 0) 66%),
    var(--sm-purple-deep);
}

.page-faq .faq-paths__figure {
  margin: 0 0 36px;
}

.page-faq .faq-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 26px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-tabs__tab {
  appearance: none;
  border: 1px solid var(--faq-rule-cool);
  background: transparent;
  color: var(--sm-body);
  font-family: var(--sm-font-body);
  font-size: 14px;
  letter-spacing: 0.08em;
  padding: 10px 18px;
  cursor: pointer;
  transition: color 140ms ease, border-color 140ms ease, background-color 140ms ease;
}

.page-faq .faq-tabs__tab:hover {
  border-color: var(--sm-gold);
  color: var(--sm-gold-lift);
}

.page-faq .faq-tabs__tab[aria-selected="true"] {
  background: var(--sm-gold);
  border-color: var(--sm-gold);
  color: var(--sm-paper-ink);
  font-weight: 700;
}

.page-faq .faq-tabs__tab:focus-visible {
  outline: 2px solid var(--sm-status);
  outline-offset: 3px;
}

.page-faq .faq-tabs__panel {
  counter-reset: faqstep;
}

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

.page-faq .faq-tabs__panel .sm-fold {
  border-bottom: 1px solid var(--sm-line);
}

.page-faq .faq-tabs__panel .sm-fold__summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 18px 2px;
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--sm-bright);
  cursor: pointer;
  list-style: none;
}

.page-faq .faq-tabs__panel .sm-fold__summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-tabs__panel .sm-fold__summary::before {
  counter-increment: faqstep;
  content: counter(faqstep, decimal-leading-zero);
  flex: none;
  font-family: var(--sm-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--sm-gold);
}

.page-faq .faq-tabs__panel .sm-fold__summary::after {
  content: "+";
  margin-left: auto;
  padding-left: 12px;
  font-family: var(--sm-font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--sm-gold);
}

.page-faq .faq-tabs__panel .sm-fold[open] > .sm-fold__summary::after {
  content: "–";
}

.page-faq .faq-tabs__panel .sm-fold__summary:focus-visible {
  outline: 2px solid var(--sm-status);
  outline-offset: 2px;
}

.page-faq .faq-tabs__panel .sm-fold__body {
  padding: 0 0 22px 0;
}

.page-faq .faq-tabs__panel .sm-fold__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--sm-body);
}

/* ---------- 响应时效 ---------- */
.page-faq .faq-submit {
  margin-top: 32px;
  padding-top: 26px;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-submit__text {
  margin: 0 0 20px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--sm-body);
}

.page-faq .faq-submit__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
  margin: 0;
}

/* ---------- 提交清单 ---------- */
.page-faq .faq-fields {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--faq-rule-cool);
}

.page-faq .faq-fields__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 16px 2px;
  border-bottom: 1px solid var(--faq-rule-cool);
}

.page-faq .faq-fields__key {
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--sm-gold);
}

.page-faq .faq-fields__val {
  font-size: 14px;
  line-height: 1.75;
  color: var(--sm-body);
}

.page-faq .faq-format__action {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
  margin-top: 28px;
}

.page-faq .faq-format__hint {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--sm-blue);
}

/* ---------- 保修与费用 ---------- */
.page-faq .faq-warranty__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
}

.page-faq .faq-warranty__sub {
  margin: 0 0 14px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--sm-bright);
}

.page-faq .faq-warranty__list {
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--sm-line);
}

.page-faq .faq-warranty__list li {
  padding: 13px 2px;
  border-bottom: 1px solid var(--sm-line);
  font-size: 14px;
  line-height: 1.72;
  color: var(--sm-body);
}

/* ---------- 延伸阅读 ---------- */
.page-faq .faq-next__title {
  margin: 0 0 26px;
  font-size: clamp(20px, 4vw, 26px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--sm-bright);
}

.page-faq .faq-next__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--sm-line);
  border-block: 1px solid var(--sm-line);
}

.page-faq .faq-next__item {
  background: var(--sm-ink);
}

.page-faq .faq-next__link {
  display: grid;
  gap: 6px;
  padding: 20px 4px;
  text-decoration: none;
  transition: background-color 160ms ease;
}

.page-faq .faq-next__link:hover {
  background: rgba(58, 30, 92, 0.32);
}

.page-faq .faq-next__link:focus-visible {
  outline: 2px solid var(--sm-status);
  outline-offset: -2px;
}

.page-faq .faq-next__label {
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--sm-gold);
}

.page-faq .faq-next__link:hover .faq-next__label {
  color: var(--sm-gold-lift);
}

.page-faq .faq-next__desc {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--sm-body);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-hero__fact {
    display: grid;
    gap: 8px;
    padding: 20px 18px;
  }

  .page-faq .faq-fields__row {
    grid-template-columns: 172px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

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

@media (min-width: 960px) {
  .page-faq .faq-hero {
    padding-block: 54px 84px;
  }

  .page-faq .faq-block {
    padding-block: 78px;
  }

  .page-faq .faq-block__head {
    margin-bottom: 44px;
  }

  .page-faq .faq-check__label {
    grid-template-columns: 26px minmax(0, 1fr);
    gap: 18px 24px;
    padding: 26px 2px;
  }

  .page-faq .faq-check__body {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: baseline;
    column-gap: 28px;
    row-gap: 10px;
  }

  .page-faq .faq-check__key {
    grid-column: 1;
  }

  .page-faq .faq-check__value {
    grid-column: 2;
    text-align: right;
  }

  .page-faq .faq-check__note {
    grid-column: 1 / -1;
  }

  .page-faq .faq-accept__figure,
  .page-faq .faq-paths__figure {
    margin-bottom: 46px;
  }

  .page-faq .faq-warranty__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 48px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-check__box,
  .page-faq .faq-check__box::before,
  .page-faq .faq-tabs__tab,
  .page-faq .faq-next__link {
    transition: none;
  }
}