.page-faq {
  --faq-index-w: 216px;
  background-color: var(--ink-900);
  color: var(--body-ink);
  background-image:
    linear-gradient(to right, var(--cyan-08) 1px, transparent 1px),
    linear-gradient(to bottom, var(--cyan-08) 1px, transparent 1px);
  background-size: 96px 96px;
  background-position: -1px -1px;
  padding-bottom: clamp(48px, 8vw, 110px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(26px, 5vw, 52px);
  padding: clamp(24px, 4.5vw, 56px) 0 clamp(36px, 6vw, 80px);
}

.page-faq .faq-hero h1 {
  margin: 0 0 0.55em;
  font-size: clamp(2rem, 6.4vw, 3.9rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--mist);
}

.page-faq .faq-hero__lede {
  max-width: 36rem;
  margin: 0 0 1.8em;
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.78;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 首屏仪表盘 */
.page-faq .dial {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(155deg, var(--glass), rgba(11, 42, 38, 0.86) 70%);
  box-shadow: 0 20px 60px rgba(4, 16, 15, 0.55);
}

.page-faq .dial::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, var(--cyan-08) 1px, transparent 1px);
  background-size: 32px 100%;
  pointer-events: none;
}

.page-faq .dial__cap {
  position: relative;
  margin: 0 0 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel);
}

.page-faq .dial__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .dial__list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .dial__k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel);
  text-transform: uppercase;
}

.page-faq .dial__v {
  font-size: clamp(1.05rem, 2.2vw, 1.4rem);
  font-weight: 700;
  color: var(--mist);
}

.page-faq .dial__list li.is-live .dial__v {
  color: var(--lime);
}

.page-faq .dial__list li.is-live .dial__k {
  color: var(--lime);
}

.page-faq .dial__rail {
  position: relative;
  height: 4px;
  margin: 22px 0 14px;
  border-radius: 4px;
  background: var(--line-soft);
}

.page-faq .dial__rail span {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 62%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--cyan), var(--lime));
}

.page-faq .dial__rail span::after {
  content: "";
  position: absolute;
  right: -5px;
  top: 50%;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  transform: translateY(-50%);
  background: var(--lime);
  box-shadow: 0 0 0 5px var(--lime-12);
}

.page-faq .dial__note {
  position: relative;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--steel);
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(28px, 5vw, 48px);
}

/* 问题索引 */
.page-faq .faq-index {
  border-top: 2px solid var(--cyan);
  padding-top: 14px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-faq .faq-index ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(150px, 1fr);
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-index ol::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index a {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  padding: 11px 14px 11px 0;
  border-bottom: 1px solid var(--line-soft);
  color: var(--body-ink);
  font-size: 0.95rem;
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-index a span {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel);
}

.page-faq .faq-index a:hover,
.page-faq .faq-index a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-faq .faq-index a:hover span,
.page-faq .faq-index a:focus-visible span {
  color: var(--lime);
}

/* ---------- 问答区块 ---------- */
.page-faq .qa {
  position: relative;
  padding: clamp(26px, 4.5vw, 46px) 0;
  border-top: 1px solid var(--line-soft);
}

.page-faq .qa::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 56px;
  height: 2px;
  background: var(--cyan);
}

.page-faq .qa:target::before {
  width: 100%;
  background: linear-gradient(90deg, var(--lime), transparent);
}

.page-faq .qa h2 {
  margin: 0.4em 0 0.6em;
  font-size: clamp(1.45rem, 3.2vw, 2.15rem);
  line-height: 1.22;
  letter-spacing: -0.01em;
  font-weight: 700;
  color: var(--mist);
}

.page-faq .qa__lede {
  max-width: 40rem;
  margin: 0 0 1.6em;
  line-height: 1.78;
}

.page-faq .qa__foot {
  margin: 1.6em 0 0;
  font-size: 0.95rem;
  color: var(--steel);
}

.page-faq .qa__foot a,
.page-faq .qa__col p a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 步骤 ---------- */
.page-faq .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-faq .steps li {
  display: grid;
  grid-template-columns: clamp(2.4rem, 9vw, 3.6rem) minmax(0, 1fr);
  gap: 6px 16px;
  align-items: start;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .steps__n {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.4rem, 4.4vw, 2.2rem);
  line-height: 1;
  color: var(--lime);
}

.page-faq .steps__c p {
  margin: 0 0 0.45em;
  line-height: 1.72;
}

.page-faq .steps__t {
  font-weight: 700;
  color: var(--mist);
  font-size: 1.05rem;
}

.page-faq .steps--tight li {
  padding-top: 12px;
}

/* ---------- 时间线 ---------- */
.page-faq .timeline {
  list-style: none;
  margin: 0 0 clamp(24px, 4vw, 36px);
  padding: 0;
  display: grid;
}

.page-faq .timeline li {
  position: relative;
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 0 16px;
  padding-bottom: 22px;
}

.page-faq .timeline li::before {
  content: "";
  grid-column: 1;
  justify-self: center;
  width: 9px;
  height: 9px;
  margin-top: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 5px var(--cyan-08);
}

.page-faq .timeline li::after {
  content: "";
  position: absolute;
  left: 9px;
  top: 24px;
  bottom: 0;
  width: 1px;
  background: var(--line-soft);
}

.page-faq .timeline li:last-child {
  padding-bottom: 0;
}

.page-faq .timeline li:last-child::after {
  display: none;
}

.page-faq .timeline li.is-live::before {
  background: var(--lime);
  box-shadow: 0 0 0 5px var(--lime-12);
}

.page-faq .timeline__label {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

.page-faq .timeline li.is-live .timeline__label {
  color: var(--lime);
}

.page-faq .timeline__t {
  margin: 0 0 4px;
  font-weight: 700;
  color: var(--mist);
}

.page-faq .timeline li p:not(.timeline__label):not(.timeline__t) {
  margin: 0;
  line-height: 1.72;
}

/* ---------- 图文并排 ---------- */
.page-faq .qa__split {
  display: grid;
  gap: clamp(20px, 4vw, 36px);
}

.page-faq .qa__figure {
  margin: 0;
}

/* ---------- 并列说明 ---------- */
.page-faq .qa__cols {
  display: grid;
  gap: 18px;
}

.page-faq .qa__col {
  padding: 16px 0 0;
  border-top: 1px solid var(--line-soft);
}

.page-faq .qa__coltitle {
  margin: 0 0 6px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-faq .qa__col p {
  margin: 0;
  line-height: 1.72;
}

/* ---------- 故障排查 ---------- */
.page-faq .trouble {
  border-top: 2px solid var(--cyan);
}

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

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

.page-faq .trouble summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "name tag"
    "desc tag";
  gap: 4px 16px;
  align-items: center;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  transition: background-color 0.2s var(--ease);
}

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

.page-faq .trouble summary:hover {
  background-color: var(--cyan-08);
}

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

.page-faq .trouble__name {
  grid-area: name;
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--mist);
}

.page-faq .trouble__desc {
  grid-area: desc;
  font-size: 0.88rem;
  color: var(--steel);
}

.page-faq .trouble summary .tag {
  grid-area: tag;
  justify-self: end;
  white-space: nowrap;
}

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

.page-faq .trouble__body {
  padding: 0 0 20px;
}

.page-faq .trouble__body ol {
  margin: 0;
  padding-left: 1.25em;
  display: grid;
  gap: 8px;
  line-height: 1.7;
  font-size: 0.96rem;
}

.page-faq .trouble__body li::marker {
  color: var(--cyan);
  font-family: var(--font-mono);
}

/* ---------- 结尾入口 ---------- */
.page-faq .faq-cta {
  display: grid;
  gap: 20px;
  margin-top: clamp(34px, 6vw, 66px);
  padding: clamp(22px, 4vw, 42px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--ink-800), rgba(6, 26, 24, 0.92));
}

.page-faq .faq-cta h2 {
  margin: 0 0 0.5em;
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  color: var(--mist);
  letter-spacing: -0.01em;
}

.page-faq .faq-cta p {
  margin: 0;
  max-width: 46rem;
  line-height: 1.75;
}

.page-faq .faq-cta .btn {
  justify-self: start;
}

/* ---------- 图片自适应 ---------- */
.page-faq .media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 720px) {
  .page-faq .qa__cols {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-faq .trouble__head {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.6fr) 96px;
    gap: 16px;
    padding: 12px 0;
    border-bottom: 1px solid var(--line-soft);
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.06em;
    color: var(--steel);
  }

  .page-faq .trouble summary {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.6fr) 96px;
    grid-template-areas: "name desc tag";
    gap: 16px;
    padding: 16px 0;
  }

  .page-faq .trouble summary:hover {
    background-color: transparent;
    color: var(--lime);
  }

  .page-faq .trouble__body {
    padding-left: 0;
    max-width: 46rem;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 980px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: end;
  }

  .page-faq .faq-body {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: clamp(40px, 5.5vw, 80px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 92px;
  }

  .page-faq .faq-index ol {
    grid-auto-flow: row;
    grid-auto-columns: auto;
    overflow-x: visible;
  }

  .page-faq .faq-index a {
    grid-template-columns: 2.4rem minmax(0, 1fr);
    gap: 10px;
    padding: 10px 0;
    align-items: baseline;
  }

  .page-faq .qa__split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 360px);
  }

  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-faq .faq-cta .btn {
    justify-self: end;
  }
}

@media (min-width: 1200px) {
  .page-faq .qa__split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 420px);
  }
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index a,
  .page-faq .trouble summary {
    transition: none;
  }
}