.page-faq {
  --faq-gap: clamp(18px, 3vw, 34px);
  --faq-panel-pad: clamp(20px, 3.4vw, 44px);
  color: var(--text);
  background: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--bar-h) + clamp(40px, 7vw, 88px)) 0 clamp(46px, 7vw, 92px);
  overflow: hidden;
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: .55;
}
.page-faq .faq-hero__grid {
  display: grid;
  gap: var(--faq-gap);
  align-items: center;
}
.page-faq .faq-hero__info .crumb {
  margin-bottom: 22px;
}
.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 6.4vw, 56px);
  line-height: 1.2;
  letter-spacing: .01em;
  margin: 14px 0 20px;
  max-width: 18ch;
}
.page-faq .faq-hero__lead {
  max-width: 46ch;
  margin-bottom: 30px;
}
.page-faq .faq-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
}
.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 0;
  padding-top: 22px;
  border-top: 1px solid var(--line-dark);
}
.page-faq .faq-hero__stats dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--sage);
  margin-bottom: 6px;
}
.page-faq .faq-hero__stats dd {
  margin: 0;
  font-size: 15px;
  color: var(--cyan-soft);
}
.page-faq .faq-hero__figure {
  margin: 0;
  position: relative;
}
.page-faq .faq-hero__figure img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}
.page-faq .faq-hero__figure::before {
  content: "";
  position: absolute;
  top: -14px;
  right: -14px;
  width: 64px;
  height: 64px;
  border-top: 1px solid var(--cyan);
  border-right: 1px solid var(--cyan);
  opacity: .7;
  pointer-events: none;
}
.page-faq .faq-hero__figure figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--sage);
}

/* ---------- 分类与折叠 ---------- */
.page-faq .faq-topics {
  padding: clamp(48px, 7vw, 96px) 0;
}
.page-faq .faq-topics__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 4.2vw, 36px);
  line-height: 1.25;
  margin: 12px 0 28px;
  max-width: 22ch;
}
.page-faq .faq-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 30px;
}
.page-faq .faq-tab {
  appearance: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--text-soft);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 11px 20px;
  cursor: pointer;
  min-height: 44px;
  transition: color .25s var(--ease), border-color .25s var(--ease), background-color .25s var(--ease);
}
.page-faq .faq-tab:hover {
  border-color: var(--ink-green);
  color: var(--ink-green);
}
.page-faq .faq-tab:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}
.page-faq .faq-tab[aria-selected="true"] {
  background: var(--ink-green);
  border-color: var(--ink-green);
  color: var(--cyan-soft);
}
.page-faq .faq-panel__intro {
  max-width: 62ch;
  color: var(--text-soft);
  margin: 0 0 24px;
}
.page-faq .faq-panel[hidden] {
  display: none;
}
.page-faq .faq-panel:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 6px;
}

.page-faq .faq-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.page-faq .faq-list--tight {
  margin-top: clamp(30px, 5vw, 54px);
}
.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-item details {
  padding: 4px 0;
}
.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 34px 20px 0;
  cursor: pointer;
  list-style: none;
  position: relative;
  transition: color .25s var(--ease);
}
.page-faq .faq-item summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 18px;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--orange);
}
.page-faq .faq-item details[open] summary::after {
  content: "–";
}
.page-faq .faq-item summary:hover {
  color: var(--ink-green);
}
.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}
.page-faq .faq-no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--orange);
  padding-top: 4px;
  flex: 0 0 auto;
}
.page-faq .faq-q {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(16px, 2.6vw, 19px);
  line-height: 1.5;
}
.page-faq .faq-a {
  padding: 0 34px 22px 46px;
  max-width: 70ch;
}
.page-faq .faq-a p {
  margin: 0 0 12px;
  color: var(--text-soft);
  line-height: 1.8;
}
.page-faq .faq-a p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-a__more a {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-green);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
  padding-bottom: 2px;
}
.page-faq .faq-a__more a:hover {
  color: var(--wine);
  border-bottom-color: var(--wine);
}

/* ---------- 导出与反馈 ---------- */
.page-faq .faq-export {
  display: grid;
  gap: var(--faq-gap);
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius);
  padding: var(--faq-panel-pad);
  box-shadow: var(--shadow-soft);
}
.page-faq .faq-export__text h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 3vw, 22px);
  line-height: 1.35;
  margin: 0 0 12px;
}
.page-faq .faq-export__text h3 + p {
  margin-top: 0;
}
.page-faq .faq-export__text p {
  color: var(--text-soft);
  line-height: 1.8;
  margin: 0 0 26px;
  max-width: 62ch;
}
.page-faq .faq-export__text h3:not(:first-child) {
  padding-top: 22px;
  border-top: 1px solid var(--line);
}
.page-faq .faq-export__figure {
  margin: 0;
}
.page-faq .faq-export__figure img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--mist);
}
.page-faq .faq-export__figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-soft);
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-support {
  padding: clamp(48px, 7vw, 96px) 0;
}
.page-faq .faq-support__grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}
.page-faq .faq-support__lead h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.25;
  margin: 12px 0 18px;
  max-width: 20ch;
}
.page-faq .faq-support__lead .lead {
  max-width: 52ch;
  margin-bottom: 26px;
}
.page-faq .faq-support__cards {
  display: grid;
  gap: 16px;
}
.page-faq .faq-support__card {
  padding: 24px 24px 26px;
  border-left: 3px solid var(--cyan);
}
.page-faq .faq-support__card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  margin: 14px 0 10px;
  color: var(--ink-green);
}
.page-faq .faq-support__card p {
  margin: 0 0 14px;
  line-height: 1.75;
  color: var(--text-soft);
}
.page-faq .faq-support__card--ink h3 {
  color: var(--cyan-soft);
}
.page-faq .faq-support__card--ink p {
  color: var(--text-on-dark);
}
.page-faq .faq-support__link {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--wine);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
  padding-bottom: 2px;
}
.page-faq .faq-support__link:hover {
  color: var(--ink-green);
}
.page-faq .faq-support__card--ink .faq-support__link {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.page-faq .faq-support__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: baseline;
  margin-top: 10px;
  font-size: 14px;
  color: var(--text-on-dark);
}
.page-faq .faq-support__meta .foot-contact__k {
  color: var(--sage);
}

.page-faq .faq-support__card p:last-of-type {
  margin-bottom: 0;
}
.page-faq .faq-support__card--ink p {
  margin-bottom: 16px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-export {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .95fr);
    align-items: start;
  }
  .page-faq .faq-support__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
  .page-faq .faq-support__card--ink {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: clamp(40px, 5vw, 72px);
  }
  .page-faq .faq-hero__lead {
    max-width: 44ch;
  }
  .page-faq .faq-support__grid {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    gap: clamp(44px, 5vw, 80px);
  }
  .page-faq .faq-support__cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-faq .faq-support__card--ink {
    grid-column: auto;
  }
  .page-faq .faq-a {
    padding-left: 62px;
  }
}

@media (max-width: 619px) {
  .page-faq .faq-hero__quick .btn {
    width: 100%;
    justify-content: center;
  }
  .page-faq .faq-hero__stats {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .page-faq .faq-hero__stats dt {
    margin-bottom: 2px;
  }
  .page-faq .faq-a {
    padding-right: 12px;
    padding-left: 26px;
  }
  .page-faq .faq-item summary {
    gap: 12px;
  }
  .page-faq .faq-support__card--ink .faq-support__meta {
    flex-direction: column;
    gap: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-tab,
  .page-faq .faq-item summary {
    transition: none;
  }
}
</main>