/* ===== 问题排查 /troubleshooting/ ===== */
.page-faq {
  --faq-line: rgba(157, 178, 200, .22);
  --faq-line-strong: rgba(53, 228, 208, .42);
  --faq-body-text: #C6D3E2;
  background: var(--ink);
  color: var(--cream);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--header-h) + 34px);
  padding-bottom: 10px;
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -30% -20% 42% -20%;
  background:
    radial-gradient(42% 52% at 22% 26%, rgba(108, 140, 213, .26), transparent 68%),
    radial-gradient(36% 46% at 82% 6%, rgba(255, 90, 43, .18), transparent 70%);
  pointer-events: none;
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--faq-line), transparent);
}
.page-faq .faq-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 26px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--mist);
}
.page-faq .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--neon);
  border-bottom-color: var(--neon);
}
.page-faq .breadcrumb span[aria-hidden] {
  color: rgba(157, 178, 200, .5);
}

.page-faq .faq-hero h1 {
  max-width: 20ch;
  margin: 10px 0 18px;
  font-family: var(--font-headline);
  font-weight: 800;
  font-size: clamp(30px, 7.4vw, 58px);
  line-height: 1.06;
  letter-spacing: .01em;
  color: var(--white);
}
.page-faq .faq-hero__lead {
  max-width: 60ch;
  margin: 0;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.76;
  color: var(--faq-body-text);
}
.page-faq .faq-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

/* ---------- 大编号 ---------- */
.page-faq .faq-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(46px, 9vw, 84px);
  line-height: .88;
  letter-spacing: .02em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 90, 43, .72);
}
.page-faq .faq-block:target .faq-num {
  -webkit-text-stroke-color: var(--neon);
}

/* ---------- 三步自查 ---------- */
.page-faq .faq-check {
  padding-top: clamp(34px, 6vw, 66px);
}
.page-faq .faq-check__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(24px, 4vw, 40px);
}
.page-faq .faq-check__hd h2,
.page-faq .faq-block__head h2 {
  margin: 0 0 10px;
  font-family: var(--font-headline);
  font-weight: 800;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.16;
  letter-spacing: .01em;
  color: var(--white);
}
.page-faq .faq-check__hd p,
.page-faq .faq-block__head p {
  max-width: 62ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.76;
  color: var(--faq-body-text);
}
.page-faq .faq-block__head p a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 228, 208, .4);
}
.page-faq .faq-block__head p a:hover {
  border-bottom-color: var(--neon);
}

.page-faq .faq-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.page-faq .faq-flow__step {
  position: relative;
  display: block;
  padding: 22px 20px 24px;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(18, 51, 84, .88), rgba(10, 26, 44, .62));
  color: inherit;
  text-decoration: none;
  transition: transform .24s var(--ease), border-color .24s var(--ease), box-shadow .24s var(--ease);
}
.page-faq .faq-flow__step:hover {
  transform: translateY(-2px);
  border-color: var(--faq-line-strong);
  box-shadow: var(--shadow-card);
}
.page-faq .faq-flow__step:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
}
.page-faq .faq-flow__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-bottom: 14px;
  border: 1px solid var(--faq-line-strong);
  border-radius: 50%;
  color: var(--neon);
  font-size: 14px;
  letter-spacing: .04em;
}
.page-faq .faq-flow__step h3 {
  margin: 0 0 8px;
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.3;
  color: var(--white);
}
.page-faq .faq-flow__step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--faq-body-text);
}

.page-faq .faq-figure {
  margin: clamp(30px, 5vw, 52px) 0 0;
}
.page-faq .faq-figure img {
  width: 100%;
  height: auto;
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding-top: clamp(38px, 6vw, 72px);
  padding-bottom: clamp(48px, 8vw, 96px);
}
.page-faq .faq-stack {
  min-width: 0;
}

/* ---------- 侧边索引 ---------- */
.page-faq .faq-index {
  order: -1;
  margin-inline: calc(var(--gutter) * -1);
  padding-inline: var(--gutter);
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.page-faq .faq-index::-webkit-scrollbar {
  display: none;
}
.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--mist);
}
.page-faq .faq-index__list {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
}
.page-faq .faq-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--faq-line);
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: .03em;
  white-space: nowrap;
  color: var(--mist);
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}
.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--neon);
  border-color: var(--faq-line-strong);
  background: rgba(53, 228, 208, .08);
}
.page-faq .faq-index__num {
  font-size: 11px;
  color: var(--flame);
}

/* ---------- 分类区块 ---------- */
.page-faq .faq-block {
  padding-top: clamp(26px, 4vw, 42px);
  padding-bottom: clamp(26px, 4vw, 42px);
  border-top: 1px solid var(--faq-line);
  scroll-margin-top: calc(var(--header-h-solid) + 28px);
}
.page-faq .faq-block:first-child {
  border-top: 0;
  padding-top: 0;
}
.page-faq .faq-block__head {
  display: grid;
  gap: 8px;
  margin-bottom: 22px;
}

/* ---------- 问题卡 ---------- */
.page-faq .qcard {
  margin-bottom: 12px;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(18, 51, 84, .7), rgba(10, 26, 44, .55));
  overflow: hidden;
  transition: border-color .24s var(--ease), box-shadow .24s var(--ease);
}
.page-faq .qcard:last-of-type {
  margin-bottom: 0;
}
.page-faq .qcard[open] {
  border-color: var(--faq-line-strong);
  box-shadow: var(--shadow-card);
}
.page-faq .qcard__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 17px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 16.5px;
  line-height: 1.5;
  color: var(--cream);
  overflow-wrap: anywhere;
  transition: color .2s var(--ease);
}
.page-faq .qcard__head::-webkit-details-marker {
  display: none;
}
.page-faq .qcard__head::marker {
  content: "";
}
.page-faq .qcard__head:hover {
  color: var(--white);
}
.page-faq .qcard__head:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: -3px;
}
.page-faq .qcard__mark {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 3px;
}
.page-faq .qcard__mark::before,
.page-faq .qcard__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--neon);
  transform: translate(-50%, -50%);
  transition: transform .24s var(--ease), opacity .24s var(--ease);
}
.page-faq .qcard__mark::before {
  width: 14px;
  height: 1.5px;
}
.page-faq .qcard__mark::after {
  width: 1.5px;
  height: 14px;
}
.page-faq .qcard[open] .qcard__mark::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}
.page-faq .qcard__body {
  margin: 0 18px 18px;
  padding: 2px 0 0 14px;
  border-left: 2px solid rgba(255, 90, 43, .45);
  font-size: 15.5px;
  line-height: 1.76;
  color: var(--faq-body-text);
  overflow-wrap: anywhere;
}
.page-faq .qcard__body p {
  margin: 0 0 10px;
}
.page-faq .qcard__body p:last-child {
  margin-bottom: 0;
}
.page-faq .qcard__body a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 228, 208, .4);
}
.page-faq .qcard__body a:hover {
  border-bottom-color: var(--neon);
}
.page-faq .mono {
  font-family: var(--font-numeric);
  font-size: 13.5px;
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  border: 1px dashed rgba(247, 183, 51, .38);
  background: rgba(247, 183, 51, .08);
  color: var(--amber);
  white-space: nowrap;
}

/* ---------- 来信路径 ---------- */
.page-faq .faq-block--last {
  padding-bottom: 0;
}
.page-faq .faq-cta {
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid rgba(255, 90, 43, .38);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(255, 90, 43, .18), rgba(108, 140, 213, .14) 55%, rgba(10, 26, 44, .5));
}
.page-faq .faq-tips {
  display: grid;
  gap: 12px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
}
.page-faq .faq-tips li {
  position: relative;
  padding-left: 22px;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--cream);
}
.page-faq .faq-tips li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 9px;
  height: 1.5px;
  background: var(--flame);
}
.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-faq .faq-cta__note {
  margin: 20px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}
.page-faq .faq-cta__note a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 228, 208, .4);
}
.page-faq .faq-cta__note a:hover {
  border-bottom-color: var(--neon);
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-faq .qcard__head {
    padding: 20px 22px;
    font-size: 17.5px;
  }
  .page-faq .qcard__body {
    margin: 0 22px 22px;
    padding-left: 18px;
  }
}

@media (min-width: 720px) {
  .page-faq .faq-check__head,
  .page-faq .faq-block__head {
    grid-template-columns: 128px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }
}

@media (min-width: 880px) {
  .page-faq .faq-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
  }
  .page-faq .faq-flow__step::after {
    content: "";
    position: absolute;
    top: 50%;
    right: -22px;
    width: 12px;
    height: 1.5px;
    background: var(--faq-line-strong);
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-shell {
    grid-template-columns: minmax(0, 1fr) 214px;
    gap: 60px;
    align-items: start;
  }
  .page-faq .faq-index {
    order: 0;
    position: sticky;
    top: calc(var(--header-h-solid) + 30px);
    margin-inline: 0;
    padding-inline: 0;
    overflow: visible;
  }
  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    padding-bottom: 0;
    border-left: 1px solid var(--faq-line);
  }
  .page-faq .faq-index__link {
    border: 0;
    border-radius: 0;
    padding: 8px 0 8px 16px;
    white-space: normal;
    line-height: 1.5;
  }
  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    background: none;
    color: var(--neon);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-flow__step,
  .page-faq .qcard,
  .page-faq .qcard__head,
  .page-faq .qcard__mark::before,
  .page-faq .qcard__mark::after {
    transition: none;
  }
  .page-faq .faq-flow__step:hover {
    transform: none;
  }
}