.page-faq {
  --faq-gap: 24px;
  --faq-ink: #2B3250;
  --faq-ink-strong: #131A30;
  background: var(--void);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: var(--deep);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -30% -12% auto -12%;
  height: 90%;
  background:
    radial-gradient(58% 68% at 18% 0%, rgba(63, 216, 210, 0.20), transparent 70%),
    radial-gradient(52% 62% at 84% 8%, rgba(124, 77, 255, 0.26), transparent 72%);
  pointer-events: none;
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
  padding-top: 40px;
  padding-bottom: 32px;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 22px;
}

.page-faq .faq-hero-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 7.4vw, 54px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 18em;
}

.page-faq .faq-hero-lead {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--paper-dim);
}

.page-faq .faq-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero-stats li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  color: var(--dust);
  letter-spacing: 0.02em;
}

.page-faq .faq-hero-stats strong {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: -0.01em;
}

.page-faq .faq-hero-media {
  position: relative;
  margin: 0;
  border-top: 1px solid var(--line);
  line-height: 0;
}

.page-faq .faq-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  opacity: 0.86;
}

/* ---------- 通用区块 ---------- */
.page-faq .section-head {
  margin-bottom: 26px;
}

.page-faq .section-head .lead {
  max-width: 62ch;
}

/* ---------- 分类总览 ---------- */
.page-faq .cat-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
}

.page-faq .cat-card {
  background: var(--panel);
  padding: 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: background 0.25s var(--ease);
}

.page-faq .cat-card:hover {
  background: #16203d;
}

.page-faq .cat-num {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-faq .cat-name {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-faq .cat-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--dust);
}

/* ---------- 问答布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-index-label {
  margin: 0 0 10px;
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--dust);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 6px;
}

.page-faq .faq-index-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 10px;
  font-size: 14px;
  color: var(--dust);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-index-list a .mono {
  font-size: 11px;
  color: var(--cyan);
  opacity: 0.85;
}

.page-faq .faq-index-list a:hover,
.page-faq .faq-index-list a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--cyan);
  background: rgba(18, 26, 51, 0.72);
  outline: none;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--bar-h) + 24px);
}

.page-faq .faq-group + .faq-group {
  margin-top: 34px;
}

.page-faq .faq-group-title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 14px;
  padding-bottom: 10px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--paper-dim);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group-title .mono {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--violet);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--panel);
  transition: border-color 0.25s var(--ease);
}

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

.page-faq .faq-item:hover {
  border-color: rgba(124, 77, 255, 0.45);
}

.page-faq .faq-item[open] {
  border-color: rgba(124, 77, 255, 0.62);
}

.page-faq .faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--paper);
}

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

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

.page-faq .faq-q-text {
  min-width: 0;
}

.page-faq .faq-arrow {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  border-right: 1.5px solid var(--dust);
  border-bottom: 1.5px solid var(--dust);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-faq .faq-item[open] .faq-arrow {
  transform: rotate(-135deg) translate(-2px, -2px);
  border-color: var(--gold);
}

.page-faq .faq-a {
  display: grid;
  gap: 16px;
  padding: 16px 18px 20px;
  border-top: 1px solid var(--line);
  animation: faq-answer-in 0.32s var(--ease);
}

@keyframes faq-answer-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.page-faq .faq-a-main p {
  margin: 0 0 10px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--paper-dim);
}

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

.page-faq .faq-steps {
  list-style: none;
  margin: 12px 0 12px;
  padding: 0;
  display: grid;
  gap: 8px;
  counter-reset: step;
}

.page-faq .faq-steps li {
  position: relative;
  padding-left: 30px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--paper);
  counter-increment: step;
}

.page-faq .faq-steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-faq .faq-note {
  background: var(--paper);
  color: var(--faq-ink);
  border-radius: var(--r);
  padding: 14px 16px;
  align-self: start;
}

.page-faq .faq-note-label {
  margin: 0 0 6px;
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-faq .faq-note p:not(.faq-note-label) {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--faq-ink);
}

/* ---------- 换设备专题 ---------- */
.page-faq .topic-grid {
  display: grid;
  gap: 26px;
}

.page-faq .topic-steps {
  list-style: none;
  margin: 0;
  padding: 4px 0 4px 28px;
  position: relative;
  display: grid;
  gap: 22px;
}

.page-faq .topic-steps::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), var(--violet) 58%, rgba(38, 48, 79, 0.1));
}

.page-faq .topic-step {
  position: relative;
}

.page-faq .topic-step::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 1px solid var(--cyan);
  background: var(--void);
}

.page-faq .topic-step-title {
  margin: 0 0 6px;
  font-size: 15.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-faq .topic-step-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--dust);
}

.page-faq .topic-media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  background: var(--panel);
  line-height: 0;
}

.page-faq .topic-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  opacity: 0.92;
}

.page-faq .topic-note {
  margin-top: 30px;
  background: var(--paper);
  color: var(--faq-ink);
  border-radius: var(--r);
  padding: 22px 20px;
}

.page-faq .topic-note-title {
  margin: 0 0 16px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--faq-ink-strong);
}

.page-faq .topic-note-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .topic-note-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--faq-ink);
}

.page-faq .topic-note-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber);
}

.page-faq .topic-note-list strong {
  display: block;
  margin-bottom: 2px;
  color: var(--faq-ink-strong);
  font-weight: 600;
}

/* ---------- 求助 ---------- */
.page-faq .support-panel {
  display: grid;
  gap: 26px;
  padding: 26px 20px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background:
    radial-gradient(80% 90% at 0% 0%, rgba(124, 77, 255, 0.18), transparent 68%),
    radial-gradient(70% 80% at 100% 20%, rgba(63, 216, 210, 0.10), transparent 70%),
    var(--deep);
}

.page-faq .support-copy .eyebrow {
  margin-bottom: 10px;
}

.page-faq .support-copy .section-title {
  margin-top: 0;
}

.page-faq .support-text {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--paper-dim);
  max-width: 56ch;
}

.page-faq .support-steps {
  margin: 18px 0 0;
}

.page-faq .support-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-faq .support-channels {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  align-self: start;
}

.page-faq .support-channels li {
  background: rgba(4, 5, 12, 0.62);
  padding: 14px 16px;
  display: grid;
  gap: 5px;
}

.page-faq .support-label {
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .support-value {
  font-size: 14.5px;
  line-height: 1.62;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-faq .support-footnote {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--dust);
}

.page-faq .support-footnote a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 180, 84, 0.4);
}

.page-faq .support-footnote a:hover,
.page-faq .support-footnote a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero-inner {
    padding-top: 56px;
    padding-bottom: 40px;
  }

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

  .page-faq .topic-note-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 28px;
  }

  .page-faq .support-panel {
    padding: 30px 28px;
  }
}

@media (min-width: 720px) {
  .page-faq .faq-a {
    grid-template-columns: minmax(0, 1fr) 224px;
    gap: 22px;
  }
}

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

  .page-faq .support-panel {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 40px;
    padding: 36px 34px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
  }

  .page-faq .faq-index-list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }

  .page-faq .faq-index-list a {
    width: 100%;
    padding: 9px 10px;
  }
}

@media (min-width: 1000px) {
  .page-faq .cat-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-a {
    animation: none;
  }

  .page-faq .faq-arrow,
  .page-faq .faq-item,
  .page-faq .cat-card {
    transition: none;
  }
}