/* ===== 帮助中心 · 页面专属样式（作用域 .page-faq） ===== */
.page-faq {
  --faq-text: #C6DAD3;
  --faq-dim: #8FA9A2;
  --faq-deep: #04211A;
  padding-bottom: clamp(40px, 7vw, 96px);
}

/* ---------- 左侧轨道 ---------- */
.page-faq .faq-rail {
  padding-top: clamp(14px, 3vw, 28px);
}

.page-faq .faq-rail__label {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .34em;
  color: var(--faq-dim);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
}

.page-faq .faq-rail__list li {
  border-top: 1px solid var(--line-soft);
}

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

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 2px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--faq-text);
  text-decoration: none;
  transition: color .15s ease, padding-left .15s ease;
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--track-hi);
  padding-left: 8px;
}

.page-faq .faq-rail__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--score);
}

.page-faq .faq-rail__note {
  border: 2px solid var(--line);
  background: var(--mist);
  padding: 16px 14px;
}

.page-faq .faq-rail__note p {
  margin: 0 0 8px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--faq-text);
}

.page-faq .faq-rail__note strong {
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--score-soft);
}

.page-faq .faq-rail__note .btn {
  margin-top: 8px;
  width: 100%;
  text-align: center;
}

/* ---------- 首屏说明 ---------- */
.page-faq .faq-intro {
  padding: clamp(14px, 3vw, 26px) 0 clamp(24px, 4vw, 42px);
  border-bottom: 2px solid var(--line);
}

.page-faq .faq-intro__title {
  margin: 14px 0 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(27px, 5vw, 50px);
  line-height: 1.14;
  letter-spacing: .02em;
  color: var(--paper);
}

.page-faq .faq-intro__lead {
  margin: 18px 0 0;
  max-width: 38em;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--faq-text);
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-group {
  padding: clamp(26px, 4.5vw, 48px) 0;
  border-bottom: 2px solid var(--line);
  scroll-margin-top: calc(var(--masthead-h) + 24px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 12px;
}

.page-faq .faq-group__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--score);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.5vw, 27px);
  line-height: 1.3;
  letter-spacing: .05em;
  color: var(--paper);
}

.page-faq .faq-group__sub {
  margin: 0 0 22px;
  max-width: 40em;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--faq-dim);
}

/* ---------- 可展开问答题 ---------- */
.page-faq .qa {
  margin-bottom: 12px;
  border: 2px solid var(--line);
  border-left: 6px solid var(--slate);
  background: var(--ink-2);
  transition: border-color .16s ease, box-shadow .16s ease;
}

.page-faq .qa[open] {
  border-color: var(--track);
  border-left-color: var(--track);
  box-shadow: var(--shadow-brut);
}

.page-faq .qa__head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: start;
  padding: 16px;
  cursor: pointer;
  list-style: none;
  -webkit-user-select: none;
  user-select: none;
}

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

.page-faq .qa__head:focus-visible {
  outline: 2px solid var(--track-hi);
  outline-offset: -4px;
}

.page-faq .qa__idx {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--score-soft);
}

.page-faq .qa__q {
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.55;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-faq .qa__mark {
  position: relative;
  flex: none;
  width: 22px;
  height: 22px;
  margin-top: 1px;
  border: 2px solid var(--slate);
  border-radius: 50%;
  transition: border-color .16s ease, background-color .16s ease;
}

.page-faq .qa__mark::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 6px;
  height: 6px;
  border-right: 2px solid var(--paper);
  border-bottom: 2px solid var(--paper);
  transform: translate(-50%, -70%) rotate(45deg);
  transition: transform .18s ease, border-color .16s ease;
}

.page-faq .qa[open] .qa__mark {
  border-color: var(--track);
  background: rgba(31, 216, 164, .12);
}

.page-faq .qa[open] .qa__mark::before {
  border-color: var(--track-hi);
  transform: translate(-50%, -28%) rotate(-135deg);
}

.page-faq .qa__body {
  padding: 0 16px 20px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .qa__lead {
  margin: 16px 0;
  padding: 11px 14px;
  border-left: 4px solid var(--score);
  background: rgba(255, 122, 43, .085);
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--paper);
}

.page-faq .qa__note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--faq-dim);
}

.page-faq .qa__body a {
  color: var(--track);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 216, 164, .45);
}

.page-faq .qa__body a:hover,
.page-faq .qa__body a:focus-visible {
  color: var(--track-hi);
  border-bottom-color: var(--track-hi);
}

.page-faq .hl {
  font-weight: 600;
  color: var(--score);
  font-family: var(--font-mono);
  font-size: .96em;
}

/* ---------- 步骤列表 ---------- */
.page-faq .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: faqstep;
}

.page-faq .steps > li {
  position: relative;
  padding-left: 36px;
  margin-bottom: 11px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--faq-text);
}

.page-faq .steps > li::before {
  counter-increment: faqstep;
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--score);
}

.page-faq .steps > li:last-child {
  margin-bottom: 0;
}

/* ---------- 设备信息模板 ---------- */
.page-faq .issue-kit {
  margin: 14px 0 4px;
  padding: 14px 16px;
  border: 2px solid var(--line);
  border-left: 6px solid var(--score);
  background: var(--faq-deep);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 2;
  color: var(--faq-text);
  white-space: pre-wrap;
  overflow-x: auto;
}

/* ---------- 配图 ---------- */
.page-faq .faq-fig {
  margin: 22px 0 4px;
  border: 2px solid var(--line);
  background: var(--mist);
  box-shadow: var(--shadow-brut);
  overflow: hidden;
}

.page-faq .faq-fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-faq .faq-fig__cap {
  padding: 9px 13px;
  border-top: 2px solid var(--line);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--faq-dim);
}

/* ---------- 结尾行动区 ---------- */
.page-faq .faq-cta {
  margin-top: clamp(28px, 4vw, 46px);
  padding: clamp(20px, 3.4vw, 34px);
  border: 2px solid var(--track);
  background: linear-gradient(135deg, rgba(31, 216, 164, .10), rgba(255, 122, 43, .06) 70%), var(--ink-2);
  box-shadow: var(--shadow-hot);
}

.page-faq .faq-cta__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.6vw, 26px);
  letter-spacing: .05em;
  color: var(--paper);
}

.page-faq .faq-cta p {
  margin: 0 0 18px;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--faq-text);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .page-faq .faq-rail__list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 18px;
  }

  .page-faq .faq-rail__list li,
  .page-faq .faq-rail__list li:last-child {
    border: 1px solid var(--line-soft);
    border-radius: 999px;
  }

  .page-faq .faq-rail__link {
    padding: 7px 13px;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    padding-left: 13px;
  }

  .page-faq .faq-rail__note {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 18px;
  }

  .page-faq .faq-rail__note p {
    margin: 0;
  }

  .page-faq .faq-rail__note .btn {
    width: auto;
    margin-top: 0;
  }
}

@media (max-width: 600px) {
  .page-faq .faq-intro__title {
    max-width: none;
    font-size: 26px;
  }

  .page-faq .qa {
    border-left-width: 4px;
  }

  .page-faq .qa__head {
    grid-template-columns: 1fr auto;
    gap: 8px;
    padding: 14px;
  }

  .page-faq .qa__idx {
    display: none;
  }

  .page-faq .qa__q {
    font-size: 15.5px;
  }

  .page-faq .qa__body {
    padding: 0 14px 18px;
  }

  .page-faq .steps > li {
    padding-left: 30px;
    font-size: 14.5px;
  }

  .page-faq .faq-cta__actions .btn {
    width: 100%;
    text-align: center;
  }
}