.page-faq {
  --faq-gap: clamp(1.25rem, 3vw, 2rem);
  --faq-soft-line: rgba(42, 55, 99, 0.85);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.5rem, 5vw, 3rem) 0 clamp(2rem, 5vw, 3.5rem);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -20%;
  width: min(720px, 92vw);
  height: min(720px, 92vw);
  background:
    radial-gradient(circle at 68% 32%, rgba(255, 90, 60, 0.22), transparent 62%),
    radial-gradient(circle at 28% 72%, rgba(22, 198, 193, 0.18), transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
}

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

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(var(--fs-31), 7vw, var(--fs-61));
  line-height: 1.08;
  letter-spacing: 0.01em;
  margin: 0.6rem 0 1rem;
  color: var(--paper);
  max-width: 22ch;
}

.page-faq .faq-hero .lede {
  max-width: 46ch;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.page-faq .faq-hero__meta {
  margin: 1.5rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--muted);
  max-width: 46ch;
}

/* 排查主线面板 */
.page-faq .faq-rail {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(18, 26, 58, 0.94), rgba(14, 21, 48, 0.94));
  padding: 1.15rem 1.25rem 0.85rem;
  box-shadow: var(--shadow);
}

.page-faq .faq-rail::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--pulse), var(--lake));
}

.page-faq .faq-rail__title {
  margin: 0 0 0.4rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--lake-soft);
}

.page-faq .faq-rail__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.85rem;
  align-items: start;
  padding: 0.8rem 0;
  border-top: 1px solid var(--line);
  text-decoration: none;
  color: var(--paper);
  transition: transform 0.25s var(--ease);
}

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

.page-faq .faq-rail__item:hover,
.page-faq .faq-rail__item:focus-visible {
  transform: translateX(3px);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--pulse);
  line-height: 1.5;
}

.page-faq .faq-rail__body {
  display: block;
  min-width: 0;
}

.page-faq .faq-rail__body strong {
  display: block;
  font-size: var(--fs-16);
  font-weight: 600;
  color: var(--paper);
  transition: color 0.2s var(--ease);
}

.page-faq .faq-rail__body span {
  display: block;
  margin-top: 0.2rem;
  font-size: var(--fs-14);
  line-height: 1.6;
}

.page-faq .faq-rail__item:hover .faq-rail__body strong {
  color: var(--lake-soft);
}

/* ---------- 六类原因 ---------- */
.page-faq .faq-why {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
}

.page-faq .faq-why__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(--radius);
  overflow: hidden;
}

.page-faq .faq-why__cell {
  background: var(--panel-deep);
  padding: 1.1rem 1.15rem;
}

.page-faq .faq-why__head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.55rem;
}

.page-faq .faq-why__tag {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--lake-soft);
}

.page-faq .faq-dot {
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  flex: none;
  border-radius: 50%;
}

.page-faq .faq-dot--red {
  background: var(--red);
  box-shadow: 0 0 0 3px rgba(255, 77, 79, 0.16);
}

.page-faq .faq-dot--yellow {
  background: var(--yellow);
  box-shadow: 0 0 0 3px rgba(255, 209, 102, 0.16);
}

.page-faq .faq-why__sign {
  margin: 0 0 0.6rem;
  font-size: var(--fs-16);
  line-height: 1.7;
  color: var(--paper);
}

.page-faq .faq-why__fix {
  margin: 0;
  padding-left: 0.85rem;
  border-left: 2px solid var(--pulse);
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--muted);
}

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

.page-faq .faq-why__figure .figure__frame {
  border-radius: var(--radius);
}

/* ---------- 入口四步 ---------- */
.page-faq .faq-entry {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
}

.page-faq .faq-flow {
  list-style: none;
  margin: 0;
  padding: 0 0 0 3rem;
  position: relative;
}

.page-faq .faq-flow::before {
  content: "";
  position: absolute;
  left: 1.1rem;
  top: 0.7rem;
  bottom: 0.7rem;
  width: 2px;
  background: linear-gradient(180deg, var(--pulse), var(--lake) 48%, var(--faq-soft-line));
}

.page-faq .faq-flow__item {
  position: relative;
  padding: 0 0 1.6rem;
}

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

.page-faq .faq-flow__item::before {
  content: "";
  position: absolute;
  left: -2.25rem;
  top: 0.35rem;
  width: 0.75rem;
  height: 0.75rem;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--night);
  border: 2px solid var(--lake);
}

.page-faq .faq-flow__item:first-child::before {
  border-color: var(--pulse);
  box-shadow: 0 0 0 4px rgba(255, 90, 60, 0.18);
}

.page-faq .faq-flow__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.2em;
  color: var(--lake-soft);
}

.page-faq .faq-flow__title {
  margin: 0.3rem 0 0.4rem;
  font-size: var(--fs-20);
  font-weight: 600;
  color: var(--paper);
  line-height: 1.4;
}

.page-faq .faq-flow__text {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.75;
  color: var(--muted);
  max-width: 46ch;
}

.page-faq .faq-flow__text a {
  color: var(--lake);
}

.page-faq .faq-entry__figure .figure__frame {
  border-radius: var(--radius);
}

/* ---------- 设备展开组 ---------- */
.page-faq .faq-devices {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}

.page-faq .faq-devices .disclosure,
.page-faq .faq-prep.disclosure {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(18, 26, 58, 0.55);
  padding: 0 1rem;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-faq .faq-devices .disclosure:has([aria-expanded="true"]),
.page-faq .faq-prep.disclosure:has([aria-expanded="true"]) {
  border-color: var(--lake);
  box-shadow: 0 0 0 1px rgba(22, 198, 193, 0.22);
}

.page-faq .disclosure__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 0;
  background: none;
  border: 0;
  color: var(--paper);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-faq .faq-dev__label {
  display: inline-flex;
  align-items: baseline;
  gap: 0.6rem;
  font-size: var(--fs-16);
  font-weight: 600;
  line-height: 1.5;
}

.page-faq .faq-dev__idx {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--pulse);
  letter-spacing: 0.16em;
}

.page-faq .disclosure__panel {
  padding: 0 0 1rem;
}

/* ---------- 清单 ---------- */
.page-faq .faq-checks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-faq .faq-checks li {
  position: relative;
  padding-left: 1.6rem;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-checks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 1rem;
  height: 2px;
  background: var(--lake);
}

/* ---------- 网络 ---------- */
.page-faq .faq-net {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
}

.page-faq .faq-net .faq-checks li {
  font-size: var(--fs-16);
  color: var(--paper);
}

.page-faq .faq-net__report {
  border: 1px solid var(--line);
  border-left: 3px solid var(--warm);
  border-radius: var(--radius-sm);
  padding: 1.1rem 1.15rem;
  background: linear-gradient(140deg, rgba(255, 177, 153, 0.08), transparent 60%), var(--panel-deep);
}

.page-faq .faq-net__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--warm);
}

.page-faq .faq-net__text {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 查看帮助 tabs ---------- */
.page-faq .faq-panel__title {
  margin: 0 0 1rem;
  font-size: var(--fs-20);
  font-weight: 600;
  color: var(--paper);
}

.page-faq .faq-path {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-faq .faq-path li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.85rem;
  align-items: baseline;
  font-size: var(--fs-16);
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-path__num {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--lake);
}

.page-faq .faq-path a {
  color: var(--lake);
}

/* ---------- 客服 ---------- */
.page-faq .faq-support {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
}

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

.page-faq .faq-when {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-faq .faq-when__item {
  padding: 0.15rem 0 0.15rem 1rem;
  border-left: 2px solid var(--yellow);
  font-size: var(--fs-16);
  line-height: 1.7;
  color: var(--paper);
}

.page-faq .faq-when__item--phone {
  border-left-color: var(--pulse);
}

.page-faq .faq-contact {
  border-radius: var(--radius);
  padding: 1.35rem 1.3rem;
  background:
    linear-gradient(150deg, rgba(22, 198, 193, 0.12), transparent 58%),
    var(--panel-deep);
}

.page-faq .faq-contact__title {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--lake-soft);
}

.page-faq .faq-contact dl {
  margin: 0;
  display: grid;
  gap: 0.9rem;
}

.page-faq .faq-contact dt {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-faq .faq-contact dd {
  margin: 0.25rem 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-16);
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-contact__note {
  margin: 1.15rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.15rem;
}

.page-faq .faq-tail {
  margin: 1.75rem 0 0;
  font-size: var(--fs-14);
  line-height: 1.8;
}

.page-faq .faq-tail a {
  color: var(--lake);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-why__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(270px, 0.8fr);
    align-items: end;
  }

  .page-faq .faq-why,
  .page-faq .faq-entry,
  .page-faq .faq-net,
  .page-faq .faq-support {
    grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.85fr);
    align-items: start;
  }

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

@media (min-width: 1080px) {
  .page-faq .faq-why__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 480px) {
  .page-faq .faq-hero__actions .btn {
    width: 100%;
    justify-content: center;
  }

  .page-faq .faq-flow {
    padding-left: 2.4rem;
  }

  .page-faq .faq-flow::before {
    left: 0.85rem;
  }

  .page-faq .faq-flow__item::before {
    left: -1.95rem;
  }
}