.page-faq {
  --faq-index-w: 236px;
  --faq-rule: var(--line-600);
  --faq-gutter: 18px;
  display: block;
}

/* ---------- 通用排版 ---------- */
.page-faq .eyebrow {
  font-family: var(--font-head);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan-400);
  margin: 0 0 10px;
}

.page-faq h2 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(20px, 2.8vw, 30px);
  line-height: 1.3;
  color: var(--text-hi);
  margin: 0 0 14px;
  max-width: 26ch;
}

.page-faq .prose {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-mid);
  margin: 0 0 18px;
  max-width: 62ch;
}

.page-faq .meta-line {
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-mid);
  border-left: 2px solid var(--cyan-700);
  padding-left: 12px;
  margin: 16px 0 0;
}

.page-faq .num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: 8px;
}

.page-faq .crumbs {
  font-family: var(--font-head);
  font-size: 13px;
  color: var(--text-mid);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.page-faq .crumbs a {
  color: var(--text-mid);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.page-faq .crumbs a:hover,
.page-faq .crumbs a:focus-visible {
  color: var(--cyan-400);
  border-bottom-color: var(--cyan-700);
  outline: none;
}

.page-faq .crumbs .slash {
  color: var(--line-600);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(26px, 5vw, 46px);
  line-height: 1.2;
  letter-spacing: .01em;
  color: var(--text-hi);
  margin: 20px 0 16px;
  max-width: 20ch;
}

.page-faq .faq-hero .lead {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-mid);
  max-width: 60ch;
  margin: 0;
}

/* 状态图例 */
.page-faq .faq-legend {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--faq-rule);
  border: 1px solid var(--faq-rule);
}

.page-faq .faq-legend__item {
  background: var(--ink-950);
  padding: 13px 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-body);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text-mid);
}

.page-faq .faq-legend__item b {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 13px;
  color: var(--text-hi);
  letter-spacing: .04em;
}

.page-faq .faq-dot {
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  align-self: center;
  border-radius: 50%;
  box-shadow: 0 0 0 1px rgba(230, 237, 247, .18);
}

.page-faq .faq-dot--normal { background: var(--up-400); }
.page-faq .faq-dot--live { background: var(--cyan-400); }
.page-faq .faq-dot--lag { background: var(--down-400); }

/* ---------- 三步自查 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

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

.page-faq .faq-step {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-top: 1px solid var(--faq-rule);
}

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

.page-faq .faq-step__no {
  font-size: 13px;
  font-weight: 700;
  color: var(--cyan-400);
  letter-spacing: .06em;
  padding-top: 4px;
}

.page-faq .faq-step__body h3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  color: var(--text-hi);
  margin: 0 0 6px;
}

.page-faq .faq-step__body p {
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--text-mid);
  margin: 0;
}

.page-faq .faq-split__fig {
  margin: 0;
  border: 1px solid var(--faq-rule);
  background: var(--ink-800);
  padding: 10px;
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-faq .faq-split__fig img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(.92) contrast(1.04);
}

/* ---------- 问题库 ---------- */
.page-faq .faq-bank__head {
  margin-bottom: 32px;
}

.page-faq .faq-bank__note {
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-mid);
  margin: 0;
  max-width: 58ch;
}

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

/* 分类索引 */
.page-faq .faq-index {
  margin-bottom: 28px;
}

.page-faq .faq-index__title {
  font-family: var(--font-head);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--text-mid);
  margin: 0 0 10px;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 2px;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-index__list li {
  flex: 0 0 auto;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px 11px;
  font-family: var(--font-head);
  font-size: 13.5px;
  color: var(--text-mid);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.page-faq .faq-index__list a .num {
  font-size: 11px;
  color: var(--cyan-700);
}

.page-faq .faq-index__n {
  font-size: 11px;
  color: var(--text-mid);
  opacity: .7;
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--text-hi);
  border-bottom-color: var(--cyan-400);
  outline: none;
}

.page-faq .faq-index__list a:hover .num,
.page-faq .faq-index__list a:focus-visible .num {
  color: var(--cyan-400);
}

/* 分类区块 */
.page-faq .faq-cat {
  margin-top: 44px;
  padding-top: 26px;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-cat:first-child {
  margin-top: 0;
}

.page-faq .faq-cat__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  margin-bottom: 6px;
}

.page-faq .faq-cat__no {
  font-size: 12px;
  font-weight: 700;
  color: var(--cyan-400);
  letter-spacing: .08em;
}

.page-faq .faq-cat__head h3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 19px;
  color: var(--text-hi);
  margin: 0;
}

.page-faq .faq-cat__meta {
  font-family: var(--font-body);
  font-size: 12.5px;
  color: var(--text-mid);
  margin: 0;
}

.page-faq .faq-cat:target .faq-cat__head h3 {
  color: var(--cyan-400);
}

/* 折叠问答 */
.page-faq .faq-q {
  border-top: 1px solid rgba(34, 48, 74, .55);
  scroll-margin-top: 90px;
}

.page-faq .faq-q:first-of-type {
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-q > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 4px 14px 0;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--text-hi);
  transition: color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}

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

.page-faq .faq-q > summary::before {
  content: "";
  flex: 0 0 auto;
  width: 0;
  height: 0;
  margin-top: 7px;
  border-left: 5px solid var(--text-mid);
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  transition: transform var(--dur-base) var(--ease), border-left-color var(--dur-fast) var(--ease);
}

.page-faq .faq-q[open] > summary::before {
  transform: rotate(90deg);
  border-left-color: var(--cyan-400);
}

.page-faq .faq-q > summary:hover,
.page-faq .faq-q > summary:focus-visible {
  color: var(--cyan-400);
  outline: none;
}

.page-faq .faq-q__no {
  flex: 0 0 auto;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--text-mid);
  padding-top: 3px;
  letter-spacing: .04em;
}

.page-faq .faq-q[open] .faq-q__no {
  color: var(--cyan-400);
}

.page-faq .faq-q__title {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-q__body {
  padding: 0 4px 22px 33px;
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text-mid);
  border-left: 2px solid transparent;
}

.page-faq .faq-q__phen {
  margin: 0;
  color: var(--text-hi);
}

.page-faq .faq-q__steps {
  list-style: none;
  margin: 10px 0;
  padding: 0;
  counter-reset: faqstep;
}

.page-faq .faq-q__steps li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 8px;
  margin-top: 5px;
}

.page-faq .faq-q__steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--font-num);
  font-size: 11.5px;
  color: var(--cyan-400);
  padding-top: 4px;
  opacity: .8;
}

.page-faq .faq-q__fix {
  margin: 8px 0 0;
  padding-top: 8px;
  border-top: 1px dashed rgba(34, 48, 74, .7);
  color: var(--text-mid);
}

.page-faq .faq-q:target > summary {
  color: var(--cyan-400);
  box-shadow: inset 3px 0 0 var(--cyan-400);
}

.page-faq .faq-q:target .faq-q__body {
  border-left-color: var(--cyan-700);
}

/* ---------- 口径图解 ---------- */
.page-faq .faq-window {
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--faq-rule);
}

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

.page-faq .faq-window dt {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  color: var(--amber-500);
  letter-spacing: .03em;
}

.page-faq .faq-window dd {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-mid);
}

.page-faq .faq-split--reverse .faq-split__fig {
  order: -1;
}

/* ---------- 必须找我们的情况 ---------- */
.page-faq .faq-must__list {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-must__list li {
  border-bottom: 1px solid var(--faq-rule);
  border-left: 2px solid var(--amber-500);
  padding: 16px 0 16px 18px;
  display: grid;
  gap: 6px;
}

.page-faq .faq-must__list b {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  color: var(--text-hi);
  line-height: 1.5;
}

.page-faq .faq-must__list span {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-mid);
}

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

.page-faq .faq-must__cta p {
  font-family: var(--font-body);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-mid);
  margin: 0;
  flex: 1 1 240px;
  min-width: 0;
}

/* ---------- 联系通道 ---------- */
.page-faq .faq-channel__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--faq-rule);
  border: 1px solid var(--faq-rule);
  margin-top: 22px;
}

.page-faq .faq-channel__box {
  background: var(--ink-900);
  padding: 20px 18px;
}

.page-faq .faq-channel__label {
  font-family: var(--font-head);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--text-mid);
  margin: 0 0 8px;
}

.page-faq .faq-channel__value {
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
  color: var(--cyan-400);
  margin: 0;
  word-break: break-all;
  user-select: all;
  -webkit-user-select: all;
}

.page-faq .faq-channel__list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: chan;
}

.page-faq .faq-channel__list li {
  counter-increment: chan;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-mid);
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 8px;
  margin-top: 6px;
}

.page-faq .faq-channel__list li::before {
  content: counter(chan, decimal-leading-zero);
  font-family: var(--font-num);
  font-size: 11.5px;
  color: var(--violet-500);
  padding-top: 3px;
}

/* ---------- 768px 以上：双栏问答手册 ---------- */
@media (min-width: 768px) {
  .page-faq .faq-legend {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 44px;
    align-items: start;
  }

  .page-faq .faq-split--reverse {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .faq-split--reverse .faq-split__fig {
    order: 0;
  }

  .page-faq .faq-layout {
    display: grid;
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-index {
    margin-bottom: 0;
    position: sticky;
    top: 28px;
  }

  .page-faq .faq-index__list {
    display: block;
    overflow: visible;
    border-bottom: 0;
    border-left: 1px solid var(--faq-rule);
    padding-bottom: 0;
  }

  .page-faq .faq-index__list li {
    display: block;
  }

  .page-faq .faq-index__list a {
    border-bottom: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
    padding: 9px 10px 9px 14px;
    white-space: normal;
  }

  .page-faq .faq-index__list a:hover,
  .page-faq .faq-index__list a:focus-visible {
    border-bottom-color: transparent;
    border-left-color: var(--cyan-400);
  }

  .page-faq .faq-index__n {
    margin-left: auto;
  }

  .page-faq .faq-q > summary {
    font-size: 15.5px;
    padding: 15px 8px 15px 0;
  }

  .page-faq .faq-q__body {
    padding: 0 8px 24px 33px;
  }

  .page-faq .faq-window__item {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

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

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

/* ---------- 1024px 以上：更宽的留白 ---------- */
@media (min-width: 1024px) {
  .page-faq {
    --faq-index-w: 268px;
  }

  .page-faq .faq-hero h1 {
    max-width: 24ch;
  }

  .page-faq .faq-split {
    gap: 64px;
  }

  .page-faq .faq-layout {
    gap: 72px;
  }

  .page-faq .faq-must__list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 40px;
    border-top: 0;
  }

  .page-faq .faq-must__list li {
    border-top: 1px solid var(--faq-rule);
  }
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-q > summary::before,
  .page-faq .faq-q > summary,
  .page-faq .faq-index__list a,
  .page-faq .crumbs a {
    transition-duration: 120ms;
  }
}
</main>