.page-faq {
  --faq-gap: clamp(18px, 3vw, 32px);
  --faq-border: 1px solid var(--line);
  --faq-shadow: 0 14px 30px rgba(0, 0, 0, 0.42);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq .breadcrumb {
  margin-top: clamp(16px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(18px, 3vw, 32px);
}

.page-faq .faq-hero__frame {
  position: relative;
  border: var(--faq-border);
  border-radius: var(--radius);
  padding: clamp(22px, 4.4vw, 52px);
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 8% 0%, rgba(47, 242, 207, 0.12), transparent 58%),
    radial-gradient(90% 90% at 100% 100%, rgba(138, 107, 255, 0.16), transparent 62%),
    linear-gradient(180deg, var(--panel) 0%, var(--ink) 100%);
}

.page-faq .faq-hero__frame::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(36, 64, 92, 0.55) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(0deg, rgba(36, 64, 92, 0.55) 0 1px, transparent 1px 88px);
  opacity: 0.35;
}

.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(47, 242, 207, 0.22);
  pointer-events: none;
}

.page-faq .faq-hero__frame > * {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-size: clamp(30px, 6.4vw, 64px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 900;
}

.page-faq .faq-hero__lead {
  margin: clamp(14px, 2.4vw, 22px) 0 0;
  max-width: 40em;
  color: var(--text);
  opacity: 0.9;
  line-height: 1.8;
}

.page-faq .faq-readouts {
  list-style: none;
  margin: clamp(22px, 3.6vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: var(--faq-border);
}

.page-faq .faq-readouts .readout {
  background: var(--panel);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-faq .faq-readouts .readout__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-faq .faq-readouts .readout__value {
  font-family: var(--font-mono);
  font-size: clamp(18px, 3vw, 24px);
  color: var(--cyan);
  line-height: 1;
}

.page-faq .faq-hero__jump {
  margin: clamp(18px, 3vw, 26px) 0 0;
}

.page-faq .faq-hero__link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 242, 207, 0.4);
  padding-bottom: 3px;
}

.page-faq .faq-hero__link:hover,
.page-faq .faq-hero__link:focus-visible {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan-soft);
}

/* ---------- 快速上手 ---------- */
.page-faq .faq-start__intro {
  max-width: 46em;
  color: var(--muted);
  line-height: 1.8;
}

.page-faq .faq-start__figure {
  margin: clamp(20px, 3.4vw, 32px) 0 0;
}

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

.page-faq .faq-steps {
  list-style: none;
  margin: clamp(20px, 3.4vw, 32px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: var(--faq-border);
}

.page-faq .faq-step {
  background: var(--panel);
  padding: clamp(18px, 3vw, 26px);
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  border-left: 3px solid transparent;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-step:hover {
  background: var(--panel-2);
  border-left-color: var(--cyan);
}

.page-faq .faq-step__no {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-step__title {
  margin: 0 0 8px;
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 700;
  letter-spacing: 0.01em;
}

.page-faq .faq-step__body p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.page-faq .faq-step__body a,
.page-faq .qa__a a,
.page-faq .faq-contact__more a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 242, 207, 0.35);
}

.page-faq .faq-step__body a:hover,
.page-faq .qa__a a:hover,
.page-faq .faq-contact__more a:hover {
  color: var(--cyan-soft);
}

/* ---------- 控制台：标签 + 折叠问答 ---------- */
.page-faq .faq-console__intro {
  max-width: 46em;
  color: var(--muted);
  line-height: 1.8;
}

.page-faq .faq-console {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  margin-top: clamp(20px, 3.4vw, 32px);
}

.page-faq .faq-console__main {
  position: relative;
  min-width: 0;
  border: var(--faq-border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel) 0%, rgba(11, 26, 43, 0.6) 100%);
  box-shadow: var(--faq-shadow);
  overflow: hidden;
}

.page-faq .faq-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  opacity: 0;
  padding: 0;
  border: 0;
}

.page-faq .faq-tabs {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 10px 10px 0;
  border-bottom: 1px solid var(--line);
  scrollbar-width: thin;
}

.page-faq .faq-tab {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  padding: 11px 14px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: var(--radius) var(--radius) 0 0;
  white-space: nowrap;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-tab__no {
  color: var(--line);
  font-size: 11px;
}

.page-faq .faq-tab:hover {
  color: var(--text);
  background: var(--panel-2);
}

.page-faq #cat-sub:checked ~ .faq-tabs .faq-tab[for="cat-sub"],
.page-faq #cat-data:checked ~ .faq-tabs .faq-tab[for="cat-data"],
.page-faq #cat-review:checked ~ .faq-tabs .faq-tab[for="cat-review"],
.page-faq #cat-device:checked ~ .faq-tabs .faq-tab[for="cat-device"] {
  color: var(--cyan);
  background: var(--ink);
  border-color: var(--line);
  box-shadow: inset 0 -2px 0 var(--cyan);
}

.page-faq #cat-sub:checked ~ .faq-tabs .faq-tab[for="cat-sub"] .faq-tab__no,
.page-faq #cat-data:checked ~ .faq-tabs .faq-tab[for="cat-data"] .faq-tab__no,
.page-faq #cat-review:checked ~ .faq-tabs .faq-tab[for="cat-review"] .faq-tab__no,
.page-faq #cat-device:checked ~ .faq-tabs .faq-tab[for="cat-device"] .faq-tab__no {
  color: var(--cyan-soft);
}

.page-faq #cat-sub:focus-visible ~ .faq-tabs .faq-tab[for="cat-sub"],
.page-faq #cat-data:focus-visible ~ .faq-tabs .faq-tab[for="cat-data"],
.page-faq #cat-review:focus-visible ~ .faq-tabs .faq-tab[for="cat-review"],
.page-faq #cat-device:focus-visible ~ .faq-tabs .faq-tab[for="cat-device"] {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-panels {
  padding: clamp(18px, 3vw, 28px);
}

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

.page-faq #cat-sub:checked ~ .faq-panels #panel-sub,
.page-faq #cat-data:checked ~ .faq-panels #panel-data,
.page-faq #cat-review:checked ~ .faq-panels #panel-review,
.page-faq #cat-device:checked ~ .faq-panels #panel-device {
  display: block;
  animation: faq-panel-in 0.3s ease both;
}

@keyframes faq-panel-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-faq .faq-panel__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 6px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-panel__title {
  margin: 0;
  font-size: clamp(17px, 2.2vw, 21px);
  font-weight: 700;
  letter-spacing: 0.01em;
}

.page-faq .faq-panel__count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--orange);
}

/* ---------- 问答条目 ---------- */
.page-faq .qa {
  border-bottom: 1px solid var(--line);
  border-left: 2px solid transparent;
  transition: border-left-color 0.2s ease, background-color 0.2s ease;
}

.page-faq .qa[open] {
  border-left-color: var(--cyan);
  background: rgba(19, 37, 58, 0.45);
}

.page-faq .qa__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  cursor: pointer;
  list-style: none;
  padding: 16px 12px;
  font-weight: 700;
  font-size: clamp(15px, 1.8vw, 16.5px);
  line-height: 1.6;
  color: var(--text);
}

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

.page-faq .qa__q:hover {
  background: var(--panel-2);
}

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

.page-faq .qa__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  padding-top: 5px;
}

.page-faq .qa__mark {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 5px;
  flex: 0 0 auto;
  transition: transform 0.22s ease;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--muted);
  transition: background-color 0.2s ease;
}

.page-faq .qa__mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .qa__mark::after {
  top: 0;
  left: 6px;
  width: 2px;
  height: 14px;
}

.page-faq .qa[open] .qa__mark {
  transform: rotate(45deg);
}

.page-faq .qa[open] .qa__mark::before,
.page-faq .qa[open] .qa__mark::after {
  background: var(--orange);
}

.page-faq .qa__a {
  padding: 0 12px 18px 40px;
}

.page-faq .qa__a p {
  margin: 0;
  color: var(--text);
  opacity: 0.86;
  line-height: 1.85;
  font-size: 15px;
}

/* ---------- 设备面板 ---------- */
.page-faq .faq-device-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 28px);
  margin-top: 6px;
}

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

.page-faq .faq-device__frame {
  aspect-ratio: 4 / 3;
  border: var(--faq-border);
  background: var(--ink);
}

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

.page-faq .faq-device__figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
  line-height: 1.7;
}

/* ---------- 右侧联系提示 ---------- */
.page-faq .faq-side__card {
  border: var(--faq-border);
  border-top: 3px solid var(--orange);
  border-radius: var(--radius);
  background: var(--panel);
  padding: clamp(18px, 3vw, 22px);
}

.page-faq .faq-side__tag {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-faq .faq-side__text {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
  font-size: 14.5px;
}

.page-faq .faq-side__mail {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--text);
  word-break: break-all;
  padding: 10px 12px;
  background: var(--ink);
  border: 1px dashed var(--line);
  border-radius: var(--radius);
}

.page-faq .faq-side__btn {
  display: inline-block;
  margin-top: 16px;
  text-decoration: none;
  text-align: center;
}

/* ---------- 联系客服 ---------- */
.page-faq .faq-contact__intro {
  max-width: 46em;
  color: var(--muted);
  line-height: 1.8;
}

.page-faq .faq-contact__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.6vw, 24px);
  margin-top: clamp(20px, 3.4vw, 32px);
}

.page-faq .faq-contact__card {
  background: var(--panel);
}

.page-faq .faq-contact__value {
  margin: 14px 0 8px;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.2vw, 18px);
  color: var(--text);
  word-break: break-all;
}

.page-faq .faq-contact__note {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
  font-size: 14.5px;
}

.page-faq .faq-contact__checklist {
  border: var(--faq-border);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel-2) 0%, var(--panel) 100%);
  padding: clamp(18px, 3vw, 26px);
}

.page-faq .faq-contact__subtitle {
  margin: 0 0 14px;
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 700;
}

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

.page-faq .faq-contact__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  color: var(--text);
  opacity: 0.88;
  line-height: 1.8;
  font-size: 15px;
}

.page-faq .faq-contact__bullet {
  width: 8px;
  height: 8px;
  margin-top: 10px;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(47, 242, 207, 0.14);
}

.page-faq .faq-contact__more {
  margin: 18px 0 0;
  color: var(--muted);
  line-height: 1.85;
  font-size: 14.5px;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-readouts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-faq .faq-contact__checklist {
    grid-column: 1 / -1;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-console {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
  }

  .page-faq .faq-side {
    position: sticky;
    top: 132px;
  }

  .page-faq .faq-device-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
    align-items: start;
  }

  .page-faq .faq-contact__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-contact__checklist {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq #cat-sub:checked ~ .faq-panels #panel-sub,
  .page-faq #cat-data:checked ~ .faq-panels #panel-data,
  .page-faq #cat-review:checked ~ .faq-panels #panel-review,
  .page-faq #cat-device:checked ~ .faq-panels #panel-device {
    animation: none;
  }

  .page-faq .qa__mark {
    transition: none;
  }
}