.page-faq {
  --faq-index-w: 236px;
  --faq-gap: clamp(24px, 4vw, 48px);
  --faq-pad: clamp(20px, 4vw, 40px);
  position: relative;
  padding: clamp(12px, 2vw, 24px) 0 clamp(56px, 8vw, 104px);
}

.page-faq .breadcrumbs {
  padding-top: 8px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  margin-top: clamp(16px, 3vw, 28px);
  padding: var(--faq-pad);
  border: 2px solid var(--line);
  background:
    linear-gradient(180deg, rgba(30, 74, 63, .62), rgba(8, 33, 28, .95)),
    repeating-linear-gradient(90deg, transparent 0 63px, rgba(198, 255, 61, .05) 63px 64px),
    repeating-linear-gradient(0deg, transparent 0 63px, rgba(198, 255, 61, .05) 63px 64px),
    var(--ink-deep);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px dashed rgba(198, 255, 61, .22);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 44px);
  align-items: center;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: clamp(30px, 5.2vw, 58px);
  line-height: 1.12;
  letter-spacing: -.015em;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 62ch;
  color: rgba(242, 245, 241, .8);
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 16px;
  margin-top: clamp(22px, 3vw, 34px);
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-left: 12px;
  border-left: 2px solid var(--lime);
}

.page-faq .faq-hero__stat b {
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.4vw, 27px);
  font-weight: 600;
  letter-spacing: -.02em;
  color: var(--lime);
}

.page-faq .faq-hero__stat span {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  line-height: 1.5;
  color: var(--neutral);
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 2px solid var(--line);
  background: var(--char);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, .5);
}

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

/* ---------- 主体：索引 + 问答 ---------- */
.page-faq .faq-body {
  margin-top: clamp(40px, 6vw, 80px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
}

.page-faq .faq-index {
  border: 2px solid var(--line);
  background: var(--char);
  padding: 16px 16px 18px;
}

.page-faq .faq-index__head {
  margin: 0;
  color: var(--lime);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-faq .faq-index__item {
  flex: 1 1 auto;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  color: var(--paper);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.4;
  transition: background var(--t-fast), border-color var(--t-fast), color var(--t-fast);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--teal);
  border-color: var(--lime);
  color: var(--lime);
}

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

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--lime);
  flex: none;
}

.page-faq .faq-index__label {
  white-space: nowrap;
}

.page-faq .faq-index__note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--neutral);
}

/* ---------- 问答章节 ---------- */
.page-faq .faq-panels {
  display: flex;
  flex-direction: column;
  gap: clamp(36px, 5vw, 60px);
  min-width: 0;
}

.page-faq .faq-section {
  scroll-margin-top: 92px;
  min-width: 0;
}

.page-faq .faq-section__head {
  border-top: 2px solid var(--line);
  padding-top: 18px;
  display: grid;
  gap: 10px;
}

.page-faq .faq-section__head .section__index {
  color: var(--lime);
}

.page-faq .faq-section__title {
  margin: 0;
  font-size: clamp(21px, 2.9vw, 31px);
  font-weight: 400;
  line-height: 1.28;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-section__lede {
  margin: 0;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: rgba(242, 245, 241, .78);
}

.page-faq .faq-section__lede a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-folds {
  margin-top: 22px;
  border-top: 1px solid var(--line);
}

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

.page-faq .fold > summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 4px;
  cursor: pointer;
  list-style: none;
  color: var(--paper);
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.62;
  transition: color var(--t-fast);
}

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

.page-faq .fold > summary:hover,
.page-faq .fold > summary:focus-visible {
  color: var(--lime);
}

.page-faq .fold > summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-faq .fold__mark {
  flex: none;
  width: 24px;
  height: 24px;
  margin-top: 2px;
  border: 1px solid var(--lime);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  color: var(--lime);
  background: transparent;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
}

.page-faq .fold[open] > summary .fold__mark {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink-deep);
}

.page-faq .fold__q {
  display: block;
}

.page-faq .fold__body {
  padding: 0 4px 20px 40px;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(242, 245, 241, .82);
}

.page-faq .fold__body p {
  margin: 0 0 12px;
}

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

.page-faq .fold__body a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 章节配图 ---------- */
.page-faq .faq-figure {
  margin: 26px 0 0;
  border: 2px solid var(--line);
  background: var(--char);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, .45);
}

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

.page-faq .faq-figure .media__caption {
  padding: 12px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  line-height: 1.7;
  color: var(--neutral);
}

/* ---------- 步骤清单 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: 60px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-step__mark {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  line-height: 1.5;
  color: var(--lime);
  padding-left: 10px;
  border-left: 2px solid var(--lime);
}

.page-faq .faq-step__text b {
  display: block;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--paper);
}

.page-faq .faq-step__text p {
  margin: 6px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(242, 245, 241, .74);
}

/* ---------- 联系方式区 ---------- */
.page-faq .faq-contact {
  margin-top: 30px;
  border: 2px solid var(--line);
  background:
    linear-gradient(135deg, rgba(30, 74, 63, .55), rgba(17, 21, 20, .95)),
    var(--char);
  padding: clamp(20px, 3vw, 32px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

.page-faq .faq-contact__title {
  margin: 10px 0 0;
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 400;
  color: var(--paper);
}

.page-faq .faq-contact__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-contact__list li {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

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

.page-faq .faq-contact__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--neutral);
}

.page-faq .faq-contact__v {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  justify-content: center;
}

.page-faq .faq-contact__hint {
  margin: 0 0 4px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(242, 245, 241, .76);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 88px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
    margin-top: 16px;
  }

  .page-faq .faq-index__item {
    flex: none;
  }

  .page-faq .faq-index__link {
    border: 0;
    border-left: 2px solid transparent;
    padding: 9px 10px;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: var(--lime);
  }
}

@media (max-width: 639px) {
  .page-faq .fold__body {
    padding-left: 4px;
  }

  .page-faq .faq-step {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 10px;
  }

  .page-faq .faq-step__mark {
    padding-left: 8px;
  }

  .page-faq .faq-contact__list li {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .page-faq .faq-index__label {
    white-space: normal;
  }
}