.page-faq {
  --faq-gap: clamp(48px, 6vw, 84px);
  background: var(--ink);
  color: var(--paper);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding-top: calc(var(--header-h) + 32px);
  padding-bottom: clamp(44px, 6vw, 78px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  top: 6%;
  width: min(620px, 68vw);
  aspect-ratio: 1;
  background: radial-gradient(circle, rgba(201, 162, 39, 0.13), transparent 68%);
  pointer-events: none;
}

.page-faq .hero-inner {
  position: relative;
  display: grid;
  gap: 38px;
  margin-top: 32px;
}

.page-faq .hero-frame {
  position: relative;
  padding: clamp(26px, 3.4vw, 44px) clamp(20px, 3vw, 40px);
  border: 1px solid var(--line-strong);
  border-left: 2px solid var(--gold);
  background: linear-gradient(165deg, rgba(30, 28, 24, 0.86), rgba(11, 11, 12, 0.18));
}

.page-faq h1 {
  margin: 16px 0 0;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(2.5rem, 7.4vw, 4.8rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .lead {
  margin: 22px 0 0;
  max-width: 48ch;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--mute);
}

.page-faq .hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 0.875rem;
  color: var(--mute);
}

.page-faq .hero-meta--item,
.page-faq .hero-meta-item {
  display: inline-flex;
  align-items: baseline;
  gap: 5px;
}

.page-faq .hero-meta-num {
  font-family: var(--font-mono);
  font-size: 1.0625rem;
  letter-spacing: 0.04em;
  color: var(--gold-lite);
}

.page-faq .faq-entry {
  align-self: end;
}

.page-faq .entry-label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-faq .entry-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .entry-list a {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 14px;
  align-items: baseline;
  padding: 13px 2px;
  border-bottom: 1px solid var(--line);
  color: var(--paper);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .entry-list li:first-child a {
  border-top: 1px solid var(--line);
}

.page-faq .entry-list a:hover,
.page-faq .entry-list a:focus-visible {
  color: var(--gold-lite);
  border-color: var(--gold-line);
  transform: translateX(4px);
}

.page-faq .entry-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--mute);
}

.page-faq .entry-arrow {
  color: var(--gold);
  font-size: 0.875rem;
}

/* ---------- 分组通用 ---------- */

.page-faq .faq-group {
  padding: var(--faq-gap) 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-group--alt {
  background: var(--ink-2);
}

.page-faq .group-head {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--gold-line);
}

.page-faq .group-index {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-faq .faq-group h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(1.75rem, 4.4vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .group-intro {
  max-width: 64ch;
  margin: 22px 0 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--mute);
}

/* ---------- 问答手风琴 ---------- */

.page-faq .qa-list {
  margin-top: 6px;
}

.page-faq .qa {
  border-bottom: 1px solid var(--line);
}

.page-faq .qa summary {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 22px 0;
  cursor: pointer;
  list-style: none;
  font-size: 1.0625rem;
  font-weight: 500;
  line-height: 1.6;
  color: var(--paper);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .qa summary::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 1.125rem;
  line-height: 1;
  color: var(--gold);
}

.page-faq .qa[open] summary::after {
  content: "−";
}

.page-faq .qa summary:hover,
.page-faq .qa summary:focus-visible {
  color: var(--gold-lite);
}

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

.page-faq .qa-a {
  max-width: 74ch;
  padding: 0 0 26px;
}

.page-faq .qa-a p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--mute);
}

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

.page-faq .qa-a a {
  color: var(--gold-lite);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-line);
  transition: border-color var(--dur) var(--ease);
}

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

.page-faq .qa[open] .qa-a {
  animation: faq-open var(--dur) var(--ease) both;
}

@keyframes faq-open {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 文档导航 ---------- */

.page-faq .doc-figure {
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 10px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(30, 28, 24, 0.72), rgba(11, 11, 12, 0.16));
}

.page-faq .doc-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .doc-grid {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.page-faq .doc-cell {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 20px;
  min-height: 116px;
  padding: clamp(18px, 2.4vw, 26px);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: background var(--dur) var(--ease);
}

.page-faq .doc-cell:hover {
  background: var(--gold-soft);
}

.page-faq .doc-name {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-faq .doc-count {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--gold);
}

/* ---------- 反馈通道 ---------- */

.page-faq .feedback-grid {
  display: grid;
  gap: 40px;
}

.page-faq .channel-list {
  list-style: none;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: 0;
}

.page-faq .channel {
  display: grid;
  gap: 9px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

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

.page-faq .channel h3 {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--paper);
}

.page-faq .channel p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--mute);
}

.page-faq .channel-value {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  letter-spacing: 0.04em;
  color: var(--gold-lite);
}

.page-faq .feedback-address {
  margin: 26px 0 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--mute);
}

.page-faq .feedback-address a {
  color: var(--gold-lite);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-line);
}

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

.page-faq .feedback-figure {
  margin: 0;
  padding: 10px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(30, 28, 24, 0.7), rgba(11, 11, 12, 0.16));
}

.page-faq .feedback-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .doc-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-faq .hero-inner {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.9fr);
    gap: 60px;
    align-items: end;
  }
}

@media (min-width: 1000px) {
  .page-faq .feedback-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.85fr);
    gap: 64px;
    align-items: start;
  }
}

@media (max-width: 560px) {
  .page-faq .qa summary {
    gap: 12px;
    padding: 19px 0;
    font-size: 1rem;
  }

  .page-faq .qa-a {
    padding-bottom: 22px;
  }

  .page-faq .doc-cell {
    min-height: 96px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .entry-list a,
  .page-faq .qa summary {
    transition: none;
  }

  .page-faq .qa[open] .qa-a {
    animation: none;
  }
}