.page-faq {
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 3vw, 36px) 0 clamp(30px, 4.4vw, 62px);
  border-bottom: 1px solid var(--line);
  background-image: radial-gradient(rgba(36, 54, 92, 0.55) 1px, transparent 1px);
  background-size: 24px 24px;
  background-position: center top;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 90% at 80% 0%, rgba(79, 216, 232, 0.13), transparent 58%),
    radial-gradient(90% 80% at 4% 100%, rgba(242, 194, 75, 0.1), transparent 62%),
    linear-gradient(180deg, rgba(5, 10, 24, 0.55), var(--ink) 90%);
}

.page-faq .faq-hero .shell {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
  margin-top: clamp(20px, 3vw, 38px);
}

.page-faq .faq-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.05rem, 5.4vw, 3.85rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  max-width: 15em;
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: clamp(1rem, 1.15vw, 1.08rem);
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-round {
  padding: 22px 22px 24px;
  background: var(--ink-2);
  clip-path: var(--cut);
  box-shadow: inset 0 0 0 1px var(--line);
  position: relative;
}

.page-faq .faq-round::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--gold), var(--cyan));
}

.page-faq .faq-round__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.22em;
  color: var(--cyan);
}

.page-faq .faq-round__num {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.page-faq .faq-round__num span {
  color: var(--gold);
  font-size: 2.5rem;
}

.page-faq .faq-round__txt {
  margin: 12px 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(26px, 3.6vw, 48px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-jump a {
  display: inline-block;
  padding: 7px 13px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--text);
  text-decoration: none;
  border: 1px solid var(--line);
  clip-path: var(--cut-sm);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  color: var(--gold);
  border-color: var(--gold);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(22px, 3.4vw, 48px);
  padding: clamp(32px, 4.6vw, 68px) 0 clamp(54px, 7vw, 108px);
}

.page-faq .faq-index {
  align-self: start;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  color: var(--muted);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 14px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

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

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 0;
  font-size: 0.86rem;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 1px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-faq .faq-index__list span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--cyan);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--text);
  border-bottom-color: var(--gold);
}

/* ---------- 章节 ---------- */
.page-faq .faq-sec {
  padding-block: clamp(30px, 4vw, 56px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-sec:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-sec__lead {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-sec__foot {
  margin: 26px 0 0;
  padding-top: 16px;
  border-top: 1px dashed rgba(36, 54, 92, 0.85);
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-sec__foot a,
.page-faq .qa__body a,
.page-faq .faq-contact a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 216, 232, 0.4);
}

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

/* ---------- 四步流程 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 16px;
  margin-top: 26px;
  position: relative;
}

.page-faq .faq-step {
  position: relative;
  padding: 20px 18px 22px;
  background: var(--ink-2);
  clip-path: var(--cut);
  box-shadow: inset 0 0 0 1px var(--line);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-faq .faq-step:hover,
.page-faq .faq-step:focus-within {
  transform: translateY(-4px);
  box-shadow: inset 0 0 0 1px var(--cyan), 0 14px 28px rgba(5, 10, 24, 0.6);
}

.page-faq .faq-step__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.04em;
}

.page-faq .faq-step__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: 1.06rem;
  font-weight: 800;
}

.page-faq .faq-step__pos {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-step__note {
  margin: 10px 0 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--muted);
  transition: color 0.3s var(--ease);
}

.page-faq .faq-step:hover .faq-step__note {
  color: var(--text);
}

.page-faq .faq-figure {
  margin: clamp(26px, 3.4vw, 44px) 0 0;
}

/* ---------- 问答 ---------- */
.page-faq .faq-qa {
  margin-top: 22px;
}

.page-faq .qa {
  border-bottom: 1px solid var(--line);
  transition: border-color 0.25s var(--ease);
}

.page-faq .qa > summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.6;
  color: var(--text);
  transition: color 0.25s var(--ease);
}

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

.page-faq .qa > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--cyan);
  transition: color 0.25s var(--ease);
}

.page-faq .qa[open] > summary {
  color: var(--gold);
}

.page-faq .qa[open] > summary::after {
  content: "−";
  color: var(--gold);
}

.page-faq .qa > summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.page-faq .qa__no {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
  flex: 0 0 auto;
}

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

.page-faq .qa__body {
  padding: 0 0 20px 32px;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .qa[open] {
  border-left: 2px solid var(--gold);
  padding-left: 14px;
}

.page-faq .qa-qa--tight .qa > summary {
  font-size: 0.98rem;
}

/* ---------- 对照表 ---------- */
.page-faq .faq-table-wrap {
  margin-top: 26px;
  overflow-x: auto;
}

.page-faq .faq-table-cap {
  caption-side: top;
  text-align: left;
  padding-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.page-faq .faq-table-side {
  display: grid;
  gap: clamp(22px, 3vw, 38px);
  margin-top: clamp(28px, 3.6vw, 46px);
  align-items: start;
}

.page-faq .faq-table-side .media-frame {
  margin: 0;
}

/* ---------- 空结果排查 ---------- */
.page-faq .faq-causes {
  display: grid;
  gap: 14px;
  margin: 26px 0 0;
}

.page-faq .faq-cause {
  padding: 18px 20px;
  background: var(--ink-2);
  border-left: 2px solid var(--line);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-faq .faq-cause:hover {
  border-left-color: var(--gold);
  background: var(--ink-3);
}

.page-faq .faq-cause dt {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.02rem;
  color: var(--text);
}

.page-faq .faq-cause dd {
  margin: 8px 0 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 导出格式 ---------- */
.page-faq .faq-format {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.page-faq .faq-format__item {
  padding: 22px 20px 24px;
  background: var(--ink-2);
  clip-path: var(--cut);
  box-shadow: inset 0 0 0 1px var(--line);
}

.page-faq .faq-format__item p {
  margin: 12px 0 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-format__code {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-faq .faq-sub {
  margin: clamp(30px, 3.6vw, 46px) 0 0;
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 800;
}

.page-faq .faq-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-chips li {
  padding: 6px 13px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
  border: 1px solid var(--line);
  clip-path: var(--cut-sm);
}

/* ---------- 清单 ---------- */
.page-faq .faq-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-list li {
  position: relative;
  padding: 12px 0 12px 24px;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--muted);
  border-bottom: 1px dashed rgba(36, 54, 92, 0.8);
}

.page-faq .faq-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 21px;
  width: 8px;
  height: 8px;
  background: var(--gold);
}

.page-faq .faq-list--boxed li {
  background: var(--ink-2);
  border-bottom: 0;
  padding: 14px 18px 14px 34px;
  margin-bottom: 10px;
  clip-path: var(--cut-sm);
}

.page-faq .faq-list--boxed li::before {
  left: 16px;
  top: 23px;
}

.page-faq .faq-list strong {
  color: var(--text);
}

/* ---------- 联系方式 ---------- */
.page-faq .faq-contact {
  margin-top: 28px;
  padding: 22px 22px 24px;
  background: var(--ink-2);
  box-shadow: inset 0 0 0 1px var(--line);
  border-top: 2px solid var(--cyan);
}

.page-faq .faq-contact__line {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  color: var(--text);
}

.page-faq .faq-contact__note {
  margin: 12px 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-steps::before {
    content: "";
    position: absolute;
    top: 34px;
    left: 6%;
    right: 6%;
    height: 1px;
    background: linear-gradient(90deg, rgba(79, 216, 232, 0.6), rgba(242, 194, 75, 0.6));
    z-index: 0;
  }

  .page-faq .faq-step {
    z-index: 1;
  }

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

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

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: end;
  }

  .page-faq .faq-table-side {
    grid-template-columns: 340px minmax(0, 1fr);
  }
}

@media (min-width: 980px) {
  .page-faq .faq-body {
    grid-template-columns: 212px minmax(0, 1fr);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 104px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 4px;
    overflow-x: visible;
  }

  .page-faq .faq-index__list a {
    font-size: 0.88rem;
  }
}

@media (max-width: 480px) {
  .page-faq .qa__body {
    padding-left: 0;
  }

  .page-faq .qa[open] {
    padding-left: 10px;
  }

  .page-faq .faq-round__num {
    font-size: 1.6rem;
  }

  .page-faq .faq-round__num span {
    font-size: 2.1rem;
  }
}