.page-faq {
  --faq-idx-w: clamp(10.5rem, 20vw, 14rem);
  --faq-gap: clamp(1.6rem, 4vw, 3rem);
  --faq-sticky-top: 5.6rem;
  color: var(--paper);
  padding-bottom: var(--pad-y);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  padding: clamp(2rem, 5vw, 3.6rem) 0 clamp(1.8rem, 4.5vw, 2.8rem);
}
.page-faq .faq-hero-inner {
  position: relative;
  z-index: 2;
}
.page-faq .faq-hero-glow {
  position: absolute;
  top: -45%;
  right: -12%;
  width: clamp(18rem, 46vw, 32rem);
  height: clamp(18rem, 46vw, 32rem);
  background: radial-gradient(circle at 40% 40%, rgba(122, 92, 255, .3), rgba(46, 230, 214, .12) 45%, transparent 68%);
  pointer-events: none;
  z-index: 1;
}
.page-faq .faq-hero-tick {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 3px;
  background: linear-gradient(90deg, var(--violet), var(--cyan) 55%, var(--gold));
  opacity: .5;
  z-index: 3;
}
.page-faq .crumb-sep {
  color: var(--line);
  margin: 0 .45rem;
}
.page-faq .crumb-current {
  color: var(--gold);
}
.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.9rem, 5.4vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -.015em;
  margin: .7rem 0 1rem;
  max-width: 20ch;
}
.page-faq .faq-lede {
  max-width: 60ch;
  color: var(--muted);
  font-size: clamp(.94rem, 2.2vw, 1.05rem);
  line-height: 1.8;
  margin: 0;
}
.page-faq .faq-chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: clamp(1.2rem, 3vw, 1.8rem) 0 0;
  padding: 0;
}
.page-faq .faq-chips a {
  display: inline-flex;
  align-items: baseline;
  gap: .4rem;
  border: 2px solid var(--line);
  padding: .38rem .72rem;
  font-size: .8rem;
  letter-spacing: .03em;
  color: var(--paper);
  text-decoration: none;
  background: rgba(13, 19, 41, .6);
  transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.page-faq .faq-chips a .num {
  color: var(--violet);
  font-size: .72rem;
}
.page-faq .faq-chips a:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(46, 230, 214, .07);
}
.page-faq .faq-chips a:hover .num {
  color: var(--cyan);
}

/* ---------- 三分钟上手 ---------- */
.page-faq .faq-start {
  padding: clamp(2.2rem, 5.5vw, 3.6rem) 0 clamp(1rem, 3vw, 1.6rem);
}
.page-faq .faq-start-head {
  margin-bottom: clamp(1.2rem, 3vw, 1.8rem);
}
.page-faq .faq-start-grid {
  display: grid;
  gap: var(--faq-gap);
  align-items: start;
}
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  background: var(--line);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
}
.page-faq .faq-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .2rem 1rem;
  background: var(--panel);
  padding: clamp(.9rem, 2.4vw, 1.3rem);
  border-left: 3px solid transparent;
  transition: background var(--dur-fast) var(--ease), border-left-color var(--dur-fast) var(--ease);
}
.page-faq .faq-step:hover {
  background: var(--card);
  border-left-color: var(--cyan);
}
.page-faq .faq-step-num {
  font-size: clamp(1.6rem, 5vw, 2.3rem);
  line-height: .95;
  font-weight: 700;
  color: var(--gold);
}
.page-faq .faq-step-body h3 {
  font-family: var(--font-display);
  font-size: clamp(.98rem, 2.4vw, 1.12rem);
  font-weight: 600;
  letter-spacing: .01em;
  margin: .1rem 0 .35rem;
}
.page-faq .faq-step-body p {
  margin: 0;
  color: var(--muted);
  font-size: .9rem;
  line-height: 1.72;
}
.page-faq .faq-start-fig {
  margin: 0;
}
.page-faq .faq-start-fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 双栏主体 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: var(--faq-gap);
  padding-top: clamp(1.6rem, 4vw, 2.6rem);
}
.page-faq .faq-index {
  align-self: start;
}
.page-faq .faq-index-title {
  margin: 0 0 .8rem;
  font-size: .7rem;
  letter-spacing: .2em;
  color: var(--cyan);
}
.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  border-left: 2px solid var(--line);
}
.page-faq .faq-index-link {
  display: flex;
  align-items: baseline;
  gap: .6rem;
  margin-left: -2px;
  padding: .52rem .75rem;
  border-left: 2px solid transparent;
  color: var(--muted);
  font-size: .86rem;
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease), border-left-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.page-faq .faq-index-link .num {
  font-size: .74rem;
  color: var(--violet);
  transition: color var(--dur-fast) var(--ease);
}
.page-faq .faq-index-link:hover {
  color: var(--paper);
  border-left-color: var(--cyan);
  background: rgba(21, 29, 61, .75);
}
.page-faq .faq-index-link:hover .num {
  color: var(--cyan);
}
.page-faq .faq-index-note {
  margin: 1rem 0 0;
  font-size: .78rem;
  line-height: 1.7;
  color: var(--muted);
  max-width: 22ch;
}

/* ---------- 分类与折叠条 ---------- */
.page-faq .faq-cat {
  scroll-margin-top: 6.5rem;
  margin-bottom: clamp(1.8rem, 4.5vw, 2.8rem);
}
.page-faq .faq-cat-head {
  display: flex;
  align-items: baseline;
  gap: .8rem;
  padding-bottom: .65rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: .9rem;
}
.page-faq .faq-cat-num {
  font-size: .8rem;
  letter-spacing: .08em;
  color: var(--gold);
  flex: 0 0 auto;
}
.page-faq .faq-cat-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 3.2vw, 1.6rem);
  font-weight: 600;
  letter-spacing: .01em;
  margin: 0;
}
.page-faq .faq-item {
  border: 2px solid var(--line);
  border-left-width: 4px;
  background: var(--panel);
  margin-bottom: .6rem;
  transition: border-left-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-faq .faq-item[open] {
  border-left-color: var(--cyan);
  background: var(--card);
}
.page-faq .faq-item:not([open]):hover {
  border-left-color: var(--violet);
}
.page-faq .faq-item > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  padding: clamp(.85rem, 2.2vw, 1.05rem) clamp(.9rem, 2.4vw, 1.25rem);
  font-size: clamp(.92rem, 2.3vw, 1.01rem);
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
  transition: color var(--dur-fast) var(--ease);
}
.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item > summary::before {
  content: "";
  flex: 0 0 auto;
  width: .5rem;
  height: .5rem;
  margin-top: .45rem;
  border: 2px solid var(--muted);
  transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.page-faq .faq-item[open] > summary::before {
  background: var(--cyan);
  border-color: var(--cyan);
}
.page-faq .faq-item > summary::after {
  content: "+";
  margin-left: auto;
  padding-left: .8rem;
  font-family: var(--font-num);
  font-size: 1.05rem;
  line-height: 1;
  color: var(--muted);
  transition: color var(--dur-fast) var(--ease);
}
.page-faq .faq-item[open] > summary::after {
  content: "–";
  color: var(--cyan);
}
.page-faq .faq-item > summary:hover {
  color: var(--gold);
}
.page-faq .faq-a {
  padding: 0 clamp(.9rem, 2.4vw, 1.25rem) clamp(.9rem, 2.2vw, 1.1rem);
  padding-left: calc(clamp(.9rem, 2.4vw, 1.25rem) + 1.25rem);
}
.page-faq .faq-a p {
  margin: 0;
  max-width: 62ch;
  font-size: .9rem;
  line-height: 1.82;
  color: var(--muted);
}
.page-faq .faq-a a,
.page-faq .faq-privacy-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 230, 214, .4);
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.page-faq .faq-a a:hover,
.page-faq .faq-privacy-note a:hover {
  color: var(--violet);
  border-bottom-color: var(--violet);
}
.page-faq .faq-privacy-note {
  margin: .9rem 0 0;
  padding-left: .9rem;
  border-left: 2px solid var(--line);
  font-size: .8rem;
  line-height: 1.75;
  color: var(--muted);
  max-width: 56ch;
}
.page-faq .faq-android-fig {
  margin: clamp(1.1rem, 3vw, 1.6rem) 0 0;
  max-width: 21rem;
}
.page-faq .faq-android-fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 6;
  object-fit: cover;
}

/* ---------- 联系提示 ---------- */
.page-faq .faq-contact {
  margin-top: clamp(1.8rem, 4.5vw, 2.8rem);
  padding-top: clamp(1.6rem, 4vw, 2.4rem);
  border-top: 1px solid var(--line);
}
.page-faq .faq-contact-inner {
  display: grid;
  gap: clamp(1.2rem, 3.5vw, 2.2rem);
  align-items: start;
}
.page-faq .faq-contact-lead h2 {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3.6vw, 1.9rem);
  font-weight: 600;
  margin: .5rem 0 .6rem;
  letter-spacing: -.005em;
}
.page-faq .faq-contact-lead p {
  margin: 0;
  color: var(--muted);
  font-size: .92rem;
  line-height: 1.78;
  max-width: 46ch;
}
.page-faq .faq-contact-list {
  margin: 0 0 1rem;
  padding: 0;
  display: grid;
  gap: .5rem;
}
.page-faq .faq-contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem .7rem;
  border: 2px solid var(--line);
  border-left-width: 4px;
  border-left-color: var(--gold);
  background: var(--panel);
  padding: .85rem 1rem;
}
.page-faq .faq-contact-row dt {
  flex: 0 0 auto;
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--cyan);
}
.page-faq .faq-contact-row dd {
  margin: 0;
  flex: 1 1 auto;
  font-family: var(--font-num);
  font-size: clamp(.84rem, 2.4vw, .95rem);
  color: var(--paper);
  word-break: break-all;
}
.page-faq .faq-contact-btn {
  display: inline-block;
}

/* ---------- 响应式 ---------- */
@media (max-width: 959px) {
  .page-faq .faq-index-title {
    margin-bottom: .6rem;
  }
  .page-faq .faq-index-list {
    grid-auto-flow: column;
    grid-auto-columns: max-content;
    overflow-x: auto;
    border-left: 0;
    border-bottom: 2px solid var(--line);
    padding-bottom: 2px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }
  .page-faq .faq-index-link {
    margin-left: 0;
    margin-bottom: -2px;
    border-left: 0;
    border-bottom: 2px solid transparent;
    white-space: nowrap;
  }
  .page-faq .faq-index-link:hover {
    border-left-color: transparent;
    border-bottom-color: var(--cyan);
  }
  .page-faq .faq-index-note {
    max-width: none;
  }
  .page-faq .faq-android-fig {
    max-width: 18rem;
  }
}

@media (min-width: 768px) {
  .page-faq .faq-contact-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-start-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-idx-w) minmax(0, 1fr);
  }
  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-sticky-top);
  }
  .page-faq .faq-contact-inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: clamp(2rem, 5vw, 4rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-step,
  .page-faq .faq-index-link,
  .page-faq .faq-chips a {
    transition: none;
  }
}