.page-faq {
  --faq-dark-line: rgba(169, 183, 198, 0.26);
  --faq-paper-line: rgba(36, 26, 18, 0.18);
  background: var(--night);
  color: var(--paper);
  padding-bottom: clamp(48px, 7vw, 88px);
}

.page-faq img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-faq section[id] {
  scroll-margin-top: calc(var(--header-h) + 20px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  background:
    radial-gradient(130% 80% at 88% -10%, rgba(183, 255, 42, 0.16), transparent 62%),
    linear-gradient(165deg, var(--night-deep) 0%, var(--night) 52%, var(--stand) 150%);
  padding-block: calc(var(--header-h) + 44px) clamp(40px, 6vw, 72px);
  border-bottom: 3px solid var(--volt);
}

.page-faq .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(18px, 3vw, 28px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-faq .breadcrumbs .crumb {
  color: var(--mist);
  text-decoration: none;
}

.page-faq .breadcrumbs a.crumb:hover,
.page-faq .breadcrumbs a.crumb:focus-visible {
  color: var(--volt);
}

.page-faq .crumb-sep {
  color: rgba(169, 183, 198, 0.5);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-faq .faq-label {
  display: inline-block;
  margin: 0 0 14px;
  padding: 4px 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  border: 1px solid currentColor;
  color: var(--amber);
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(38px, 7.4vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  color: var(--paper);
  text-wrap: balance;
}

.page-faq .faq-hero .lede {
  max-width: 34em;
  margin: 0;
  color: var(--mist);
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.85;
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero-figure {
  margin: 0;
}

.page-faq .faq-hero-figure .figure-frame {
  border: 3px solid var(--volt);
  box-shadow: 12px 12px 0 rgba(5, 15, 29, 0.6);
  overflow: hidden;
  background: var(--night-deep);
}

.page-faq .faq-hero-figure img {
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-faq .faq-hero-figure .figure-caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist);
}

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

.page-faq .faq-facts li {
  background: var(--night-deep);
  padding: 16px clamp(12px, 1.6vw, 20px);
}

.page-faq .fact-num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.2vw, 34px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--volt);
}

.page-faq .fact-label {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--mist);
}

/* ---------- 主体网格 ---------- */
.page-faq .faq-body {
  padding-top: clamp(34px, 5vw, 60px);
}

.page-faq .faq-main {
  display: flex;
  flex-direction: column;
  gap: clamp(26px, 4vw, 46px);
}

.page-faq .faq-rail {
  display: none;
}

/* ---------- 通用栏目头 ---------- */
.page-faq .faq-head {
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-faq .faq-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 42px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-head .faq-sub {
  max-width: 44em;
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 三步查阅 ---------- */
.page-faq .faq-steps,
.page-faq .faq-questions {
  background: var(--paper);
  color: var(--ink);
  border: 3px solid var(--paper-shadow);
  box-shadow: 10px 10px 0 rgba(5, 15, 29, 0.55);
  padding: clamp(22px, 3.4vw, 42px);
}

.page-faq .faq-steps .faq-head h2,
.page-faq .faq-questions .faq-head h2 {
  color: var(--ink);
}

.page-faq .faq-steps .faq-label,
.page-faq .faq-questions .faq-label {
  color: var(--card-red);
}

.page-faq .faq-steps .faq-sub,
.page-faq .faq-questions .faq-sub {
  color: rgba(36, 26, 18, 0.74);
}

.page-faq .step-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-faq .step-card {
  position: relative;
  background: var(--night);
  color: var(--paper);
  border: 2px solid var(--night-deep);
  box-shadow: 6px 6px 0 var(--paper-shadow);
  padding: clamp(18px, 2.4vw, 26px);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.page-faq .step-card:target {
  box-shadow: 6px 6px 0 var(--volt);
  transform: translateY(-2px);
}

.page-faq .step-num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(40px, 5.6vw, 58px);
  line-height: 0.9;
  letter-spacing: 0.02em;
  color: var(--volt);
}

.page-faq .step-card h3 {
  margin: 14px 0 10px;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.2vw, 23px);
  line-height: 1.28;
  color: var(--paper);
}

.page-faq .step-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--mist);
}

.page-faq .step-foot {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--faq-dark-line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--amber);
}

/* ---------- 场景卡 ---------- */
.page-faq .faq-scenes {
  background:
    linear-gradient(180deg, rgba(18, 52, 90, 0.55), transparent 62%),
    var(--night-deep);
  border: 2px solid var(--faq-dark-line);
  padding: clamp(22px, 3.4vw, 40px);
}

.page-faq .scene-grid {
  display: grid;
  gap: 14px;
}

.page-faq .scene-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--stand);
  border: 1px solid var(--faq-dark-line);
  padding: clamp(18px, 2.2vw, 24px);
}

.page-faq .scene-tag {
  align-self: flex-start;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--night-deep);
  background: var(--amber);
}

.page-faq .scene-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.1vw, 22px);
  line-height: 1.3;
  color: var(--paper);
}

.page-faq .scene-card p {
  flex: 1;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .scene-go {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--volt);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}

.page-faq .scene-go:hover,
.page-faq .scene-go:focus-visible {
  color: var(--amber);
}

.page-faq .scene-card--media {
  background: linear-gradient(165deg, var(--stand), var(--teal));
}

.page-faq .scene-card--media img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border: 1px solid rgba(242, 231, 207, 0.25);
}

/* ---------- 常见问题 ---------- */
.page-faq .qa-list {
  border-top: 1px solid var(--faq-paper-line);
}

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

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.4;
  color: var(--ink);
  transition: color 0.18s ease;
}

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

.page-faq .qa summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--card-red);
}

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

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

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

.page-faq .qa-body {
  padding: 0 0 18px;
}

.page-faq .qa-body p {
  max-width: 62em;
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(36, 26, 18, 0.84);
}

/* ---------- 字段词典 ---------- */
.page-faq .faq-glossary {
  background: var(--teal);
  border: 2px solid rgba(183, 255, 42, 0.35);
  padding: clamp(22px, 3.4vw, 40px);
}

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

.page-faq .term {
  position: relative;
  padding: 8px 16px;
  background: rgba(8, 26, 47, 0.45);
  border: 1px solid rgba(242, 231, 207, 0.38);
  color: var(--paper);
  font-size: 14px;
  cursor: help;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.page-faq .term:hover,
.page-faq .term:focus,
.page-faq .term:focus-within {
  border-color: var(--volt);
  background: rgba(8, 26, 47, 0.88);
  outline: none;
}

.page-faq .term:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

.page-faq .term-name {
  font-weight: 700;
}

.page-faq .term-pop {
  position: absolute;
  left: 0;
  bottom: calc(100% + 10px);
  z-index: 6;
  width: min(280px, 74vw);
  padding: 12px 14px;
  background: var(--paper);
  color: var(--ink);
  font-size: 13px;
  line-height: 1.7;
  border: 2px solid var(--night-deep);
  box-shadow: 5px 5px 0 rgba(5, 15, 29, 0.45);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity 0.16s ease, transform 0.16s ease, visibility 0.16s ease;
  pointer-events: none;
}

.page-faq .term:hover .term-pop,
.page-faq .term:focus .term-pop,
.page-faq .term:focus-within .term-pop {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ---------- 仍需帮助 ---------- */
.page-faq .faq-help {
  background: linear-gradient(150deg, var(--night-deep), var(--stand));
  border: 3px solid var(--volt);
  box-shadow: 12px 12px 0 rgba(183, 255, 42, 0.12);
  padding: clamp(22px, 3.4vw, 40px);
}

.page-faq .help-grid {
  display: grid;
  gap: 14px;
}

.page-faq .help-card {
  background: rgba(5, 15, 29, 0.42);
  border: 1px solid var(--faq-dark-line);
  padding: 18px;
}

.page-faq .help-key {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-faq .help-val {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.3;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .help-note {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .help-card .copy-btn {
  margin-top: 14px;
}

.page-faq .copy-note {
  margin: 8px 0 0;
  min-height: 1.2em;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--volt);
}

.page-faq .copy-note:empty {
  display: none;
}

.page-faq .help-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 侧栏目录 ---------- */
.page-faq .rail-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-faq .rail-list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  border-left: 2px solid var(--faq-dark-line);
}

.page-faq .rail-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-left: -2px;
  padding: 9px 12px;
  font-size: 14px;
  color: var(--paper);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.page-faq .rail-list a:hover,
.page-faq .rail-list a:focus-visible {
  color: var(--volt);
  border-left-color: var(--volt);
  background: rgba(183, 255, 42, 0.07);
}

.page-faq .rail-idx {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--amber);
}

.page-faq .rail-card {
  display: grid;
  gap: 10px;
  background: rgba(18, 52, 90, 0.5);
  border: 1px solid var(--faq-dark-line);
  padding: 16px;
}

.page-faq .rail-card-title {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-faq .rail-card a {
  padding-bottom: 8px;
  font-size: 14px;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-dark-line);
}

.page-faq .rail-card a:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .rail-card a:hover,
.page-faq .rail-card a:focus-visible {
  color: var(--volt);
}

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

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

@media (min-width: 780px) {
  .page-faq .scene-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-faq .step-track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 920px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: end;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-body {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 236px;
    gap: clamp(32px, 4vw, 60px);
    align-items: start;
  }

  .page-faq .faq-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

@media (max-width: 520px) {
  .page-faq .scene-tag {
    font-size: 10.5px;
  }

  .page-faq .step-card,
  .page-faq .scene-card,
  .page-faq .help-card {
    padding: 16px;
  }
}