.page-faq {
  --faq-rail: 220px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 30px 0 32px;
  border-bottom: 2px solid var(--line);
  background:
    radial-gradient(110% 84% at 88% -12%, rgba(59, 227, 240, 0.17), transparent 62%),
    radial-gradient(86% 74% at 4% 108%, rgba(138, 107, 255, 0.16), transparent 66%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.3;
  background-image:
    linear-gradient(to right, rgba(35, 52, 90, 0.6) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(35, 52, 90, 0.6) 1px, transparent 1px);
  background-size: 46px 46px;
}

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

.page-faq .faq-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(30px, 6.6vw, 50px);
  line-height: 1.14;
  letter-spacing: 0.035em;
  color: var(--bright);
  margin: 12px 0 14px;
  max-width: 22ch;
}

.page-faq .faq-hero .lead {
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  margin: 0;
}

.page-faq .faq-hero__figures {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
}

@media (min-width: 640px) {
  .page-faq .faq-hero__figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-faq .faq-hero__fig {
  border: 2px solid var(--line);
  border-left: 5px solid var(--cyan);
  background: rgba(14, 23, 41, 0.78);
  box-shadow: var(--hard-sm);
  padding: 12px 14px;
}

.page-faq .faq-hero__fig dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--dim);
}

.page-faq .faq-hero__fig dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

/* ---------- 主体栅格 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 34px;
    align-items: start;
  }
}

/* ---------- 侧向场景标签 ---------- */
.page-faq .faq-rail {
  border: 2px solid var(--line);
  background: var(--panel);
  box-shadow: var(--hard-sm);
  padding: 14px;
}

@media (min-width: 900px) {
  .page-faq .faq-rail {
    position: sticky;
    top: 104px;
  }
}

.page-faq .faq-rail__title {
  margin: 0 0 10px;
}

.page-faq .faq-rail__bar {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
}

@media (min-width: 900px) {
  .page-faq .faq-rail__bar {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }
}

.page-faq .faq-rail__bar .filter-btn {
  flex: 0 0 auto;
  white-space: nowrap;
  border: 2px solid var(--line);
  border-radius: 0;
  background: transparent;
  color: var(--text);
  font-family: var(--font-head);
  font-size: 14px;
  letter-spacing: 0.08em;
  padding: 8px 12px;
  cursor: pointer;
  transition: border-color 0.18s, color 0.18s, box-shadow 0.18s;
}

@media (min-width: 900px) {
  .page-faq .faq-rail__bar .filter-btn {
    width: 100%;
    text-align: left;
  }
}

.page-faq .faq-rail__bar .filter-btn:hover {
  border-color: var(--cyan);
  color: var(--bright);
}

.page-faq .faq-rail__bar .filter-btn[aria-pressed="true"] {
  border-color: var(--amber);
  color: var(--amber);
  box-shadow: var(--hard-sm);
}

.page-faq .faq-rail__hint {
  margin: 10px 0 0;
  font-size: 12px;
  line-height: 1.65;
  color: var(--dim);
}

/* ---------- 场景与问答流 ---------- */
.page-faq .faq-flow {
  min-width: 0;
}

.page-faq .faq-empty {
  border: 2px dashed var(--line);
  background: rgba(14, 23, 41, 0.6);
  padding: 22px 18px;
  text-align: center;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
}

.page-faq .faq-scene + .faq-scene {
  margin-top: 42px;
}

.page-faq .faq-scene__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 10px;
  margin-bottom: 18px;
  border-bottom: 2px solid var(--line);
}

.page-faq .faq-scene__num {
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--violet);
}

.page-faq .faq-scene__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(20px, 3.6vw, 28px);
  letter-spacing: 0.06em;
  color: var(--bright);
}

/* ---------- 图文 ---------- */
.page-faq .faq-figure {
  margin: 0 0 18px;
}

.page-faq .faq-figure .media-frame__caption {
  color: var(--dim);
}

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

/* ---------- 折叠问答卡 ---------- */
.page-faq .qa-card {
  border: 2px solid var(--line);
  background: var(--panel);
  box-shadow: var(--hard-sm);
  transition: border-color 0.18s;
}

.page-faq .qa-card + .qa-card {
  margin-top: 12px;
}

.page-faq .qa-card[open] {
  border-color: rgba(59, 227, 240, 0.8);
}

.page-faq .qa-card > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 15px 16px;
  font-family: var(--font-head);
  font-size: 16px;
  line-height: 1.55;
  letter-spacing: 0.04em;
  color: var(--bright);
}

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

.page-faq .qa-card > summary:hover {
  color: var(--cyan);
}

.page-faq .qa-card__q {
  flex: 1 1 auto;
}

.page-faq .qa-card__sign {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-top: 4px;
}

.page-faq .qa-card__sign::before,
.page-faq .qa-card__sign::after {
  content: "";
  position: absolute;
  background: var(--cyan);
}

.page-faq .qa-card__sign::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}

.page-faq .qa-card__sign::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
  transition: opacity 0.18s;
}

.page-faq .qa-card[open] .qa-card__sign::after {
  opacity: 0;
}

.page-faq .qa-card__body {
  padding: 0 16px 16px;
  border-top: 2px solid transparent;
}

.page-faq .qa-card[open] .qa-card__body {
  border-top-color: var(--line);
  padding-top: 14px;
}

/* ---------- 结论与步骤 ---------- */
.page-faq .qa-verdict {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--bright);
}

.page-faq .qa-verdict__tag {
  flex: 0 0 auto;
  border: 1px solid var(--line);
  padding: 2px 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .faq-steps {
  counter-reset: faqstep;
  list-style: none;
  margin: 16px 0 0;
  padding: 0 0 0 14px;
  border-left: 2px solid rgba(59, 227, 240, 0.36);
}

.page-faq .faq-steps li {
  counter-increment: faqstep;
  position: relative;
  padding: 7px 0 7px 34px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--text);
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 10px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .qa-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

.page-faq .qa-list li {
  position: relative;
  padding: 6px 0 6px 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}

.page-faq .qa-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 15px;
  width: 6px;
  height: 6px;
  background: var(--violet);
}

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

.page-faq .qa-more a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 227, 240, 0.5);
}

.page-faq .qa-more a:hover {
  color: var(--bright);
  border-bottom-color: var(--bright);
}

/* ---------- 三段式自查结论 ---------- */
.page-faq .check-trio {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin: 16px 0 0;
}

@media (min-width: 620px) {
  .page-faq .check-trio {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-faq .check-trio__item {
  border: 2px solid var(--line);
  border-left-width: 6px;
  background: rgba(14, 23, 41, 0.7);
  padding: 12px 13px;
}

.page-faq .check-trio__item--ok {
  border-left-color: var(--green);
}

.page-faq .check-trio__item--warn {
  border-left-color: var(--amber);
}

.page-faq .check-trio__item--fix {
  border-left-color: var(--magenta);
}

.page-faq .check-trio__label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--dim);
}

.page-faq .check-trio__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.68;
  color: var(--text);
}

/* ---------- 人工协助 ---------- */
.page-faq .faq-cta {
  margin-top: 16px;
  border: 2px solid var(--line);
  border-top: 4px solid var(--amber);
  background: linear-gradient(180deg, rgba(255, 194, 75, 0.09), rgba(14, 23, 41, 0.92));
  box-shadow: var(--hard-sm);
  padding: 18px 16px;
}

.page-faq .faq-cta__text {
  margin: 10px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--bright);
}

.page-faq .faq-cta__meta {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--dim);
}

.page-faq .faq-cta__row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 16px;
}

@media (min-width: 640px) {
  .page-faq .faq-cta {
    padding: 22px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-card,
  .page-faq .qa-card__sign::after,
  .page-faq .faq-rail__bar .filter-btn {
    transition: none;
  }
}