.page-faq {
  --faq-card: rgba(30, 58, 50, 0.44);
  --faq-card-strong: rgba(30, 58, 50, 0.72);
  --faq-hair: rgba(201, 207, 199, 0.16);
  --faq-glow: rgba(198, 255, 61, 0.16);
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(130% 90% at 88% 0%, var(--faq-glow), transparent 62%),
    linear-gradient(158deg, var(--c-moss) 0%, var(--bg) 58%);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: auto -10% -46px 42%;
  height: 120px;
  background: rgba(198, 255, 61, 0.06);
  transform: rotate(-5deg);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding-block: 1.5rem 2.5rem;
}

.page-faq .faq-hero__copy .breadcrumb {
  margin-bottom: 1rem;
}

.page-faq .faq-hero h1 {
  margin: 0.6rem 0 1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 7.4vw, 3.6rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  max-width: 18ch;
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 54ch;
  color: var(--fg-muted);
  font-size: var(--step-1);
  line-height: 1.8;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

/* 状态面板 */
.page-faq .faq-board {
  background: var(--bg-glass);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 1.1rem 1.15rem 1rem;
  box-shadow: var(--shadow-lift);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 3px solid var(--c-lime);
}

.page-faq .faq-board__head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-1);
  letter-spacing: 0.02em;
}

.page-faq .faq-led {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex: none;
  display: inline-block;
}

.page-faq .faq-led--lime {
  background: var(--c-lime);
  box-shadow: 0 0 0 3px rgba(198, 255, 61, 0.16);
}

.page-faq .faq-led--ember {
  background: var(--c-ember);
  box-shadow: 0 0 0 3px rgba(255, 90, 54, 0.18);
}

.page-faq .faq-board__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-board__list li {
  border-bottom: 1px dashed var(--line);
}

.page-faq .faq-board__list a {
  display: grid;
  grid-template-columns: 2.2rem minmax(0, 1fr);
  align-items: center;
  gap: 0.6rem;
  padding: 0.66rem 0.15rem;
  color: var(--fg);
  text-decoration: none;
  transition: color 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-board__list a:hover,
.page-faq .faq-board__list a:focus-visible {
  color: var(--c-lime);
  background: rgba(198, 255, 61, 0.06);
}

.page-faq .faq-board__num {
  font-family: var(--font-mono);
  font-size: var(--step-0);
  color: var(--c-lime);
  letter-spacing: 0.06em;
}

.page-faq .faq-board__label {
  font-size: var(--step-1);
  line-height: 1.4;
}

.page-faq .faq-board__foot {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  margin: 0.9rem 0 0;
  font-size: var(--step-0);
  line-height: 1.6;
  color: var(--fg-muted);
}

.page-faq .faq-board__foot .faq-led {
  margin-top: 0.45rem;
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
  padding-block: 2rem 3.5rem;
}

.page-faq .faq-main {
  min-width: 0;
}

.page-faq .faq-block {
  padding-block: 1.9rem;
  border-top: 1px solid var(--faq-hair);
  scroll-margin-top: 1.5rem;
}

.page-faq .faq-block:first-child {
  border-top: 0;
  padding-top: 0.5rem;
}

.page-faq .faq-block__head {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.page-faq .faq-block__index {
  font-family: var(--font-mono);
  font-size: var(--step-1);
  color: var(--c-lime);
  letter-spacing: 0.1em;
  flex: none;
}

.page-faq .faq-block__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 4.6vw, 2.1rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.page-faq .faq-block__lede {
  margin: 0 0 1.4rem;
  max-width: 62ch;
  color: var(--fg-muted);
  font-size: var(--step-1);
  line-height: 1.8;
}

/* ---------- 四步检查 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.8rem;
  counter-reset: faqstep;
}

.page-faq .faq-step {
  position: relative;
  padding: 1rem 1.1rem 0.95rem;
  background: var(--faq-card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--c-lime);
  border-radius: var(--radius);
}

.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-size: var(--step-0);
  letter-spacing: 0.12em;
  color: var(--c-lime);
}

.page-faq .faq-step__title {
  margin: 0.3rem 0 0.45rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-2);
  line-height: 1.35;
}

.page-faq .faq-step__text {
  margin: 0;
  color: var(--fg-muted);
  font-size: var(--step-1);
  line-height: 1.75;
}

.page-faq .faq-step__flag {
  margin: 0.7rem 0 0;
  padding-top: 0.55rem;
  border-top: 1px dashed var(--line);
  font-size: var(--step-0);
  letter-spacing: 0.04em;
  color: var(--fg-dim);
}

/* ---------- 通用分栏 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.6rem;
  align-items: start;
}

.page-faq .faq-split__body,
.page-faq .faq-split__side {
  min-width: 0;
}

/* ---------- 小屏异常 ---------- */
.page-faq .faq-symptoms {
  list-style: none;
  margin: 0 0 1.3rem;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.page-faq .faq-symptoms li {
  position: relative;
  padding: 0.7rem 0.9rem 0.7rem 1.5rem;
  background: rgba(17, 22, 20, 0.55);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--fg-muted);
  font-size: var(--step-1);
  line-height: 1.7;
}

.page-faq .faq-symptoms li::before {
  content: "";
  position: absolute;
  left: 0.62rem;
  top: 1.15rem;
  width: 5px;
  height: 5px;
  background: var(--c-ember);
}

.page-faq .faq-symptoms strong {
  color: var(--fg);
  font-weight: 700;
}

.page-faq .faq-devices {
  margin: 0 0 1.2rem;
  padding: 0.95rem 1rem;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  background: rgba(30, 58, 50, 0.3);
}

.page-faq .faq-devices__cap {
  margin: 0 0 0.7rem;
  font-size: var(--step-0);
  letter-spacing: 0.12em;
  color: var(--c-lime);
  text-transform: uppercase;
}

.page-faq .faq-device {
  display: block;
  margin: 0 0 0.45rem;
  height: 1.85rem;
  line-height: 1.85rem;
  padding-inline: 0.65rem;
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--c-clay);
  background: rgba(11, 31, 26, 0.75);
  color: var(--fg-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.page-faq .faq-device--sm { width: 52%; }
.page-faq .faq-device--md { width: 72%; }
.page-faq .faq-device--lg { width: 100%; border-left-color: var(--c-lime); }

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

.page-faq .faq-tip {
  margin: 0;
  padding: 0.85rem 1rem;
  border-left: 3px solid var(--c-lime);
  background: rgba(198, 255, 61, 0.07);
  color: var(--fg);
  font-size: var(--step-1);
  line-height: 1.75;
}

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

.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--line-strong);
  background: var(--c-carbon);
}

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

/* ---------- 收藏标签 ---------- */
.page-faq .faq-restore {
  margin: 0 0 1.2rem;
  padding: 0;
  list-style: none;
  counter-reset: restore;
  display: grid;
  gap: 0.6rem;
}

.page-faq .faq-restore li {
  counter-increment: restore;
  position: relative;
  padding: 0.75rem 0.9rem 0.75rem 2.7rem;
  background: var(--faq-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: var(--step-1);
  line-height: 1.7;
  color: var(--fg-muted);
}

.page-faq .faq-restore li::before {
  content: counter(restore, decimal-leading-zero);
  position: absolute;
  left: 0.85rem;
  top: 0.78rem;
  font-family: var(--font-mono);
  font-size: var(--step-0);
  color: var(--c-lime);
  letter-spacing: 0.06em;
}

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

.page-faq .faq-note {
  padding: 0.95rem 1rem;
  border: 1px solid rgba(255, 90, 54, 0.34);
  border-left: 3px solid var(--c-ember);
  background: rgba(255, 90, 54, 0.07);
  border-radius: var(--radius);
}

.page-faq .faq-note__title {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-1);
  color: var(--fg);
}

.page-faq .faq-note__list {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--fg-muted);
  font-size: var(--step-1);
  line-height: 1.75;
}

.page-faq .faq-panel {
  padding: 1.1rem 1.15rem;
  border-left: 3px solid var(--c-lime);
}

.page-faq .faq-panel__title {
  margin: 0 0 0.6rem;
  font-size: var(--step-0);
  letter-spacing: 0.14em;
  color: var(--c-lime);
  text-transform: uppercase;
}

.page-faq .faq-panel__figure {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(2.2rem, 8vw, 3.2rem);
  line-height: 1;
  color: var(--fg);
}

.page-faq .faq-panel__desc {
  margin: 0.6rem 0 0;
  font-size: var(--step-1);
  line-height: 1.75;
  color: var(--fg-muted);
}

.page-faq .faq-panel__meta {
  margin: 0.7rem 0 0;
  padding-top: 0.6rem;
  border-top: 1px solid var(--line);
  font-size: var(--step-0);
  line-height: 1.65;
  color: var(--fg-dim);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-acc {
  border-top: 1px solid var(--line-strong);
}

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

.page-faq .faq-acc summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 0.2rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-1);
  line-height: 1.5;
  color: var(--fg);
  transition: color 0.18s ease;
}

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

.page-faq .faq-acc summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-weight: 400;
  color: var(--c-lime);
  font-size: 1.1rem;
  line-height: 1.3;
}

.page-faq .faq-acc details[open] summary::after {
  content: "–";
}

.page-faq .faq-acc summary:hover,
.page-faq .faq-acc summary:focus-visible {
  color: var(--c-lime);
}

.page-faq .faq-acc details p {
  margin: 0 0 1rem;
  padding-left: 0.2rem;
  max-width: 64ch;
  color: var(--fg-muted);
  font-size: var(--step-1);
  line-height: 1.8;
}

/* ---------- 反馈渠道 ---------- */
.page-faq .faq-need__title {
  margin: 0 0 0.7rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-2);
}

.page-faq .faq-need {
  list-style: none;
  margin: 0 0 1.3rem;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.5rem;
}

.page-faq .faq-need li {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0.55rem;
  align-items: baseline;
  padding: 0.6rem 0.8rem;
  background: rgba(17, 22, 20, 0.5);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: var(--step-1);
  line-height: 1.65;
  color: var(--fg-muted);
}

.page-faq .faq-need .num {
  font-family: var(--font-mono);
  font-size: var(--step-0);
  color: var(--c-lime);
  letter-spacing: 0.08em;
}

.page-faq .faq-contact {
  list-style: none;
  margin: 0 0 1.2rem;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}

.page-faq .faq-contact li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.15rem;
  padding: 0.65rem 0.2rem;
  border-bottom: 1px solid var(--line);
  font-size: var(--step-1);
  line-height: 1.6;
}

.page-faq .faq-contact__k {
  font-size: var(--step-0);
  letter-spacing: 0.12em;
  color: var(--fg-dim);
  text-transform: uppercase;
}

.page-faq .faq-contact .contact-list__mono {
  font-family: var(--font-mono);
  color: var(--c-lime);
  word-break: break-all;
}

/* ---------- 右侧目录 ---------- */
.page-faq .faq-side {
  min-width: 0;
  order: -1;
}

.page-faq .faq-toc {
  border: 1px solid var(--line);
  border-top: 3px solid var(--c-lime);
  background: var(--faq-card-strong);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
}

.page-faq .faq-toc__title {
  margin: 0 0 0.6rem;
  font-size: var(--step-0);
  letter-spacing: 0.14em;
  color: var(--c-lime);
  text-transform: uppercase;
}

.page-faq .faq-toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 0.45rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

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

.page-faq .faq-toc a {
  display: block;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--fg);
  text-decoration: none;
  font-size: var(--step-0);
  letter-spacing: 0.06em;
  white-space: nowrap;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.page-faq .faq-toc a:hover,
.page-faq .faq-toc a:focus-visible {
  background: var(--c-lime);
  border-color: var(--c-lime);
  color: var(--c-ink);
}

.page-faq .faq-toc__foot {
  margin: 0.7rem 0 0;
  padding-top: 0.6rem;
  border-top: 1px solid var(--line);
  font-size: var(--step-0);
  color: var(--fg-muted);
}

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

/* ---------- 平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__grid {
    padding-block: 2rem 3rem;
  }

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

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

  .page-faq .faq-contact li {
    grid-template-columns: 7rem minmax(0, 1fr);
    align-items: baseline;
    gap: 0.8rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: end;
    gap: 3rem;
    padding-block: 2.5rem 3.5rem;
  }

  .page-faq .faq-hero__actions {
    margin-top: 1.9rem;
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 2rem;
  }

  .page-faq .faq-split--reverse {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.72fr);
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) 248px;
    gap: 3.5rem;
    padding-block: 3rem 5rem;
  }

  .page-faq .faq-side {
    order: 0;
    position: sticky;
    top: 1.5rem;
  }

  .page-faq .faq-toc ol {
    display: grid;
    gap: 0.35rem;
    overflow-x: visible;
  }

  .page-faq .faq-toc a {
    padding: 0.45rem 0.6rem;
    border-color: transparent;
    border-left: 2px solid var(--line-strong);
    border-radius: 0;
  }

  .page-faq .faq-toc a:hover,
  .page-faq .faq-toc a:focus-visible {
    background: rgba(198, 255, 61, 0.1);
    border-color: var(--line-strong);
    border-left-color: var(--c-lime);
    color: var(--c-lime);
  }

  .page-faq .faq-block {
    padding-block: 2.6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-board__list a,
  .page-faq .faq-toc a,
  .page-faq .faq-acc summary {
    transition: none;
  }
}