.page-faq {
  --faq-rail-w: 212px;
  --faq-card-bg: linear-gradient(180deg, rgba(20, 22, 28, .94), rgba(11, 18, 32, .94));
  --faq-ink-on-paper: #14161C;
  display: block;
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(20px, 4vw, 44px) 0 clamp(16px, 3vw, 28px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -80px 0 auto auto;
  width: min(520px, 70vw);
  height: 320px;
  background: radial-gradient(60% 60% at 70% 30%, rgba(42, 47, 82, .85), transparent 70%);
  pointer-events: none;
  z-index: -1;
}

.page-faq .faq-hero__inner {
  position: relative;
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(32px, 5.4vw, 58px);
  line-height: 1.06;
  letter-spacing: -.02em;
  font-weight: 900;
  color: var(--text);
  max-width: 22ch;
}

.page-faq .faq-hero .lede {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.8vw, 18px);
  line-height: 1.78;
  color: var(--silver);
}

.page-faq .faq-jump {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-jump a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(42, 47, 82, .32);
  color: var(--text);
  font-size: 14px;
  text-decoration: none;
  transition: border-color .2s var(--ease), color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  border-color: var(--lime);
  color: var(--lime);
  background: rgba(184, 255, 60, .06);
}

/* ---------- 布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 20px;
  padding: clamp(8px, 2vw, 16px) 0 clamp(44px, 8vw, 88px);
  min-width: 0;
}

.page-faq .faq-rail {
  border: 1px solid var(--line);
  border-radius: var(--panel-r);
  background: rgba(20, 22, 28, .72);
  padding: 12px;
  min-width: 0;
}

.page-faq .faq-rail__title {
  margin: 0 0 8px;
  padding-left: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--silver);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail__list li {
  flex: none;
}

.page-faq .faq-rail__list a {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--text);
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .faq-rail__n {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--lava);
}

.page-faq .faq-rail__t {
  color: inherit;
}

.page-faq .faq-main {
  display: grid;
  gap: 22px;
  min-width: 0;
}

/* ---------- 问答画板 ---------- */
.page-faq .faq-block {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--panel-r);
  background: var(--faq-card-bg);
  padding: clamp(18px, 3vw, 30px);
  min-width: 0;
  overflow: hidden;
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}

.page-faq .faq-block::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 96px;
  height: 3px;
  background: linear-gradient(90deg, var(--lime), transparent);
}

.page-faq .faq-block__head h2 {
  margin: 10px 0 0;
  font-size: clamp(21px, 2.9vw, 30px);
  line-height: 1.2;
  letter-spacing: -.01em;
  font-weight: 800;
  color: var(--text);
}

.page-faq .faq-block__desc {
  margin: 10px 0 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--silver);
}

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

.page-faq .faq-block--paper {
  background: var(--cream);
  border-color: rgba(20, 22, 28, .18);
  color: var(--faq-ink-on-paper);
}

.page-faq .faq-block--paper::before {
  background: linear-gradient(90deg, var(--lava), transparent);
}

.page-faq .faq-block--paper .faq-block__head h2 {
  color: var(--faq-ink-on-paper);
}

.page-faq .faq-block--paper .faq-block__desc {
  color: rgba(20, 22, 28, .72);
}

.page-faq .faq-block--paper .coord {
  color: var(--rust);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  border-top: 1px solid var(--line);
}

.page-faq .qa:first-of-type {
  border-top: 0;
}

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  min-height: 44px;
  padding: 15px 0;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.8vw, 17px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--text);
}

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

.page-faq .qa summary::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.4;
  color: var(--lime);
}

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

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

.page-faq .qa__a {
  padding: 0 0 18px;
  max-width: 70ch;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(232, 234, 240, .82);
}

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

.page-faq .qa__a p:last-child {
  margin-bottom: 0;
}

.page-faq .qa__a a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .qa[open] .qa__a {
  animation: faq-fade .3s var(--ease) both;
}

@keyframes faq-fade {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .faq-block--paper .qa {
  border-top-color: rgba(20, 22, 28, .16);
}

.page-faq .faq-block--paper .qa summary {
  color: var(--faq-ink-on-paper);
}

.page-faq .faq-block--paper .qa[open] summary {
  color: var(--rust);
}

.page-faq .faq-block--paper .qa__a {
  color: rgba(20, 22, 28, .8);
}

.page-faq .faq-block--paper .qa__a a {
  color: var(--rust);
}

/* ---------- 入口路径示意图 ---------- */
.page-faq .entry-visual {
  margin: 18px 0 6px;
  padding: 16px;
  border: 1px dashed var(--line-strong);
  border-radius: 12px;
  display: grid;
  gap: 14px;
}

.page-faq .entry-map {
  width: 100%;
  max-width: 340px;
  height: auto;
}

.page-faq .entry-map rect {
  fill: rgba(42, 47, 82, .6);
  stroke: rgba(154, 163, 173, .38);
  stroke-width: 1.5;
}

.page-faq .entry-map .em-hot {
  fill: var(--lime);
  stroke: var(--lime);
}

.page-faq .entry-map text {
  font-family: var(--font-mono);
  font-size: 13px;
}

.page-faq .entry-map .em-mark {
  fill: var(--silver);
}

.page-faq .entry-map .em-label {
  fill: #0B1220;
  font-size: 15px;
  letter-spacing: .06em;
}

.page-faq .entry-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .entry-steps li {
  display: flex;
  gap: 10px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.7;
  color: var(--silver);
}

.page-faq .entry-steps li strong {
  color: var(--text);
  font-weight: 600;
}

.page-faq .entry-steps__n {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--lime);
}

/* ---------- 图 ---------- */
.page-faq .faq-shot {
  margin: clamp(16px, 3vw, 24px) 0 0;
}

.page-faq .faq-shot img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  object-fit: cover;
}

.page-faq .faq-shot--entry img {
  aspect-ratio: 10 / 7;
}

.page-faq .faq-shot--wide img {
  aspect-ratio: 3 / 2;
}

.page-faq .faq-shot .frame__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--silver);
}

/* ---------- 联系信息 ---------- */
.page-faq .faq-block--paper .contact-lines {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px dashed rgba(20, 22, 28, .25);
}

.page-faq .faq-block--paper .contact-key {
  color: rgba(20, 22, 28, .62);
}

.page-faq .faq-block--paper .contact-value {
  color: var(--faq-ink-on-paper);
  font-family: var(--font-mono);
}

.page-faq .faq-block--paper .copy-btn {
  border-color: rgba(20, 22, 28, .3);
  color: var(--faq-ink-on-paper);
  background: transparent;
}

.page-faq .faq-block--paper .copy-btn:hover {
  border-color: var(--rust);
  color: var(--rust);
}

.page-faq .faq-note {
  margin: 20px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--lava);
  border-radius: 0 10px 10px 0;
  background: rgba(255, 91, 46, .08);
  font-size: 14px;
  line-height: 1.78;
  color: rgba(20, 22, 28, .82);
}

.page-faq .faq-note a {
  color: var(--rust);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 桌面栅格 ---------- */
@media (min-width: 720px) {
  .page-faq .entry-visual {
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    align-items: center;
    gap: 22px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--head-h) + 24px);
    padding: 16px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__list a:hover,
  .page-faq .faq-rail__list a:focus-visible {
    border-color: var(--line-strong);
    background: rgba(42, 47, 82, .5);
  }

  .page-faq .faq-block__body {
    margin-top: 10px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-block {
    padding: 34px 36px 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa[open] .qa__a {
    animation: none;
  }

  .page-faq .faq-block,
  .page-faq .faq-jump a,
  .page-faq .faq-rail__list a {
    transition: none;
  }
}