.page-faq {
  --faq-line: rgba(124, 255, 230, 0.16);
  --faq-line-soft: rgba(124, 255, 230, 0.07);
  --faq-body: rgba(241, 235, 223, 0.7);
  --faq-gap: clamp(20px, 3vw, 36px);
  color: var(--paper);
  padding-bottom: clamp(56px, 8vw, 104px);
  overflow-x: clip;
}

/* ---------- 页头 ---------- */
.page-faq__head {
  padding-top: clamp(24px, 4vw, 48px);
}

.page-faq__head .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-faq__title {
  margin: 10px 0 0;
  font-size: clamp(38px, 7.5vw, 84px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.02em;
}

.page-faq__lede {
  margin-top: 18px;
  max-width: 42ch;
  color: var(--faq-body);
  font-size: 16.5px;
  line-height: 1.8;
}

.page-faq__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(24px, 3.5vw, 40px) 0 0;
  padding: 0;
  list-style: none;
}

/* ---------- 分段切换 ---------- */
.faq-switch {
  position: relative;
}

.faq-switch__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.faq-switch__bar {
  display: flex;
  align-items: stretch;
  gap: 2px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  border-bottom: 1px solid var(--hairline);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.faq-switch__bar::-webkit-scrollbar {
  display: none;
}

.faq-switch__tab {
  flex: 0 0 auto;
  scroll-snap-align: start;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 14px 16px 15px;
  margin-bottom: -1px;
  border-bottom: 2px solid transparent;
  font-size: 14px;
  line-height: 1;
  white-space: nowrap;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.faq-switch__tab:hover {
  color: var(--cyan-soft);
}

.faq-switch__idx {
  font: 600 11px/1 var(--font-mono);
  letter-spacing: 0.1em;
  color: var(--grid);
  transition: color 0.18s var(--ease);
}

.faq-switch__radio:focus-visible ~ .faq-switch__bar .faq-switch__tab {
  outline: 2px solid var(--cyan-soft);
  outline-offset: -4px;
}

.faq-switch__radio--1:checked ~ .faq-switch__bar .faq-switch__tab--1,
.faq-switch__radio--2:checked ~ .faq-switch__bar .faq-switch__tab--2,
.faq-switch__radio--3:checked ~ .faq-switch__bar .faq-switch__tab--3,
.faq-switch__radio--4:checked ~ .faq-switch__bar .faq-switch__tab--4,
.faq-switch__radio--5:checked ~ .faq-switch__bar .faq-switch__tab--5,
.faq-switch__radio--6:checked ~ .faq-switch__bar .faq-switch__tab--6 {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.faq-switch__radio--1:checked ~ .faq-switch__bar .faq-switch__tab--1 .faq-switch__idx,
.faq-switch__radio--2:checked ~ .faq-switch__bar .faq-switch__tab--2 .faq-switch__idx,
.faq-switch__radio--3:checked ~ .faq-switch__bar .faq-switch__tab--3 .faq-switch__idx,
.faq-switch__radio--4:checked ~ .faq-switch__bar .faq-switch__tab--4 .faq-switch__idx,
.faq-switch__radio--5:checked ~ .faq-switch__bar .faq-switch__tab--5 .faq-switch__idx,
.faq-switch__radio--6:checked ~ .faq-switch__bar .faq-switch__tab--6 .faq-switch__idx {
  color: var(--cyan-soft);
}

.faq-switch__panels {
  padding-top: clamp(28px, 4vw, 56px);
}

.faq-switch__panel {
  display: none;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
}

.faq-switch__radio--1:checked ~ .faq-switch__panels > .faq-switch__panel--1,
.faq-switch__radio--2:checked ~ .faq-switch__panels > .faq-switch__panel--2,
.faq-switch__radio--3:checked ~ .faq-switch__panels > .faq-switch__panel--3,
.faq-switch__radio--4:checked ~ .faq-switch__panels > .faq-switch__panel--4,
.faq-switch__radio--5:checked ~ .faq-switch__panels > .faq-switch__panel--5,
.faq-switch__radio--6:checked ~ .faq-switch__panels > .faq-switch__panel--6 {
  display: grid;
  animation: faq-in 0.34s var(--ease) both;
}

@keyframes faq-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}

.faq-panel__col {
  min-width: 0;
}

.faq-panel__head {
  margin-bottom: clamp(22px, 3vw, 34px);
}

.faq-panel__title {
  margin: 10px 0 0;
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.faq-panel__intro {
  margin: 12px 0 0;
  max-width: 40ch;
  color: var(--faq-body);
  font-size: 15.5px;
  line-height: 1.8;
}

.faq-panel__intro a,
.faq-devices__item a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--hairline-strong);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.faq-panel__intro a:hover,
.faq-devices__item a:hover {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan-soft);
}

/* ---------- 步骤列表 ---------- */
.faq-steps {
  margin: 0;
  padding: 0;
  list-style: none;
}

.faq-steps__item {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 26px;
}

.faq-steps__item::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 32px;
  bottom: 6px;
  width: 1px;
  background: var(--faq-line);
}

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

.faq-steps__item:last-child::before {
  display: none;
}

.faq-steps__no {
  display: grid;
  place-items: center;
  width: 40px;
  height: 28px;
  border: 1px solid var(--hairline-strong);
  border-radius: 999px;
  background: rgba(0, 232, 210, 0.05);
  color: var(--cyan);
  font: 700 12px/1 var(--font-mono);
  letter-spacing: 0.06em;
}

.faq-steps__title {
  margin: 3px 0 8px;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.4;
}

.faq-steps__body p {
  margin: 0;
  max-width: 40ch;
  color: var(--faq-body);
  font-size: 15px;
  line-height: 1.8;
}

.faq-steps__more {
  margin-top: 10px;
}

.faq-steps__more > summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 0;
  list-style: none;
  cursor: pointer;
  color: var(--cyan-soft);
  font: 500 12px/1 var(--font-mono);
  letter-spacing: 0.08em;
}

.faq-steps__more > summary::-webkit-details-marker {
  display: none;
}

.faq-steps__more > summary::before {
  content: "+";
  font-size: 14px;
  line-height: 1;
}

.faq-steps__more[open] > summary::before {
  content: "−";
}

.faq-steps__more p {
  margin: 8px 0 0;
  max-width: 38ch;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.75;
}

/* ---------- 字段说明 ---------- */
.faq-fields {
  margin: 0;
}

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

.faq-fields__item:first-child {
  border-top: 0;
  padding-top: 0;
}

.faq-fields__term {
  font: 600 13px/1.4 var(--font-mono);
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.faq-fields__desc {
  margin: 8px 0 0;
  max-width: 42ch;
  color: var(--faq-body);
  font-size: 15px;
  line-height: 1.8;
}

/* ---------- 设备清单 ---------- */
.faq-devices {
  margin: 0;
  padding: 0;
  list-style: none;
}

.faq-devices__item {
  padding: 18px 0;
  border-top: 1px solid var(--faq-line-soft);
}

.faq-devices__item:first-child {
  border-top: 0;
  padding-top: 0;
}

.faq-devices__tag {
  display: inline-block;
  padding: 5px 10px;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius);
  background: rgba(0, 232, 210, 0.05);
  color: var(--cyan);
  font: 600 11.5px/1 var(--font-mono);
  letter-spacing: 0.1em;
}

.faq-devices__item p {
  margin: 10px 0 0;
  max-width: 42ch;
  color: var(--faq-body);
  font-size: 15px;
  line-height: 1.8;
}

/* ---------- 疑问折叠 ---------- */
.faq-questions {
  border-top: 1px solid var(--faq-line-soft);
}

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

.faq-questions__q {
  position: relative;
  padding: 16px 32px 16px 0;
  list-style: none;
  cursor: pointer;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper);
  transition: color 0.18s var(--ease);
}

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

.faq-questions__q::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 16px;
  color: var(--cyan);
  font: 500 18px/1.4 var(--font-mono);
}

.faq-questions__item[open] .faq-questions__q::after {
  content: "−";
}

.faq-questions__q:hover {
  color: var(--cyan);
}

.faq-questions__a {
  margin: 0 0 18px;
  max-width: 46ch;
  color: var(--faq-body);
  font-size: 14.5px;
  line-height: 1.8;
}

/* ---------- 求助块 ---------- */
.faq-help {
  padding: 24px;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius);
  background: linear-gradient(165deg, rgba(0, 232, 210, 0.06), rgba(5, 7, 10, 0));
}

.faq-help__eyebrow {
  margin: 0;
  font: 600 11.5px/1 var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
}

.faq-help__text {
  margin: 14px 0 20px;
  max-width: 40ch;
  color: var(--faq-body);
  font-size: 15px;
  line-height: 1.8;
}

.faq-help__btn {
  display: inline-flex;
}

/* ---------- 纯 CSS 线框 ---------- */
.faq-wire {
  padding: 16px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(11, 19, 26, 0.92), rgba(5, 7, 10, 0.92));
  overflow: hidden;
}

.faq-wire__top {
  display: flex;
  align-items: center;
  gap: 7px;
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--faq-line-soft);
}

.faq-wire__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--grid);
}

.faq-wire__dot--on {
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(0, 232, 210, 0.65);
}

.faq-wire__title {
  margin-left: auto;
  font: 500 10.5px/1 var(--font-mono);
  letter-spacing: 0.1em;
  color: var(--muted);
}

.faq-wire__head {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) 46px;
  gap: 10px;
  padding-bottom: 8px;
  color: var(--grid);
  font: 600 10px/1 var(--font-mono);
  letter-spacing: 0.12em;
}

.faq-wire__head span:last-child {
  text-align: right;
}

.faq-wire__row {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) 46px;
  align-items: center;
  gap: 10px;
  padding: 7px 0;
  border-bottom: 1px solid var(--faq-line-soft);
}

.faq-wire__row:last-child {
  border-bottom: 0;
}

.faq-wire__rank {
  font: 700 12px/1 var(--font-mono);
  color: var(--muted);
}

.faq-wire__row--top .faq-wire__rank {
  color: var(--cyan);
}

.faq-wire__bar {
  display: block;
  height: 7px;
  min-width: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(0, 232, 210, 0.75), rgba(0, 232, 210, 0.1));
}

.faq-wire__row--top .faq-wire__bar {
  background: linear-gradient(90deg, var(--cyan), rgba(0, 232, 210, 0.16));
}

.faq-wire__val {
  text-align: right;
  font: 600 12px/1 var(--font-mono);
  color: var(--paper);
}

.faq-wire__stages,
.faq-wire__slices {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.faq-wire__stage,
.faq-wire__slice {
  padding: 6px 10px;
  border: 1px solid var(--faq-line);
  border-radius: 999px;
  color: var(--muted);
  font: 500 11px/1 var(--font-mono);
  letter-spacing: 0.06em;
}

.faq-wire__stage--on,
.faq-wire__slice--on {
  border-color: var(--cyan);
  background: rgba(0, 232, 210, 0.12);
  color: var(--cyan);
}

.faq-wire__form {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 0;
  border-top: 1px solid var(--faq-line-soft);
  border-bottom: 1px solid var(--faq-line-soft);
}

.faq-wire__form-label {
  flex: 0 0 auto;
  font: 500 10.5px/1 var(--font-mono);
  letter-spacing: 0.1em;
  color: var(--muted);
}

.faq-wire__cells {
  display: flex;
  gap: 4px;
}

.faq-wire__cell {
  width: 13px;
  height: 13px;
  border-radius: 2px;
  background: var(--grid);
}

.faq-wire__cell--w { background: var(--cyan); }
.faq-wire__cell--d { background: var(--muted); }
.faq-wire__cell--l { background: var(--orange); }

.faq-wire__legend {
  display: flex;
  gap: 14px;
  padding-top: 12px;
}

.faq-wire__key {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font: 500 10.5px/1 var(--font-mono);
  letter-spacing: 0.08em;
  color: var(--muted);
}

.faq-wire__key::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 2px;
  background: var(--grid);
}

.faq-wire__key--w::before { background: var(--cyan); }
.faq-wire__key--d::before { background: var(--muted); }
.faq-wire__key--l::before { background: var(--orange); }

.faq-wire__axis {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 26px;
  margin-bottom: 14px;
}

.faq-wire__axis::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  background: var(--faq-line);
}

.faq-wire__tick {
  position: relative;
  width: 2px;
  height: 12px;
  background: var(--grid);
}

.faq-wire__tick--on {
  width: 3px;
  height: 22px;
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(0, 232, 210, 0.7);
  animation: faq-pulse 2s ease-in-out infinite;
}

@keyframes faq-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

.faq-wire__record {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-top: 1px solid var(--faq-line-soft);
}

.faq-wire__score {
  font: 700 14px/1 var(--font-mono);
  color: var(--paper);
}

.faq-wire__round {
  font: 500 11px/1 var(--font-mono);
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 图片 ---------- */
.faq-figure {
  margin: 0;
}

.faq-figure__frame {
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--panel), var(--ink));
  overflow: hidden;
}

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

.faq-figure__cap,
.faq-caption {
  margin: 12px 0 0;
  max-width: 44ch;
  color: var(--muted);
  font: 500 11.5px/1.7 var(--font-mono);
  letter-spacing: 0.04em;
}

/* ---------- 提醒开关预览 ---------- */
.faq-switch-demo {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--faq-line-soft);
}

.faq-switch-demo__label {
  font: 500 11px/1 var(--font-mono);
  letter-spacing: 0.1em;
  color: var(--muted);
}

.faq-switch-demo__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.faq-switch-demo__control {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.faq-switch-demo__track {
  position: relative;
  width: 42px;
  height: 22px;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  background: var(--grid);
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease);
}

.faq-switch-demo__knob {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--muted);
  transition: transform 0.18s var(--ease), background 0.18s var(--ease);
}

.faq-switch-demo__input:checked ~ .faq-switch-demo__control .faq-switch-demo__track {
  border-color: var(--hairline-strong);
  background: rgba(0, 232, 210, 0.16);
}

.faq-switch-demo__input:checked ~ .faq-switch-demo__control .faq-switch-demo__knob {
  transform: translateX(20px);
  background: var(--cyan);
}

.faq-switch-demo__input:focus-visible ~ .faq-switch-demo__control .faq-switch-demo__track {
  outline: 2px solid var(--cyan-soft);
  outline-offset: 3px;
}

.faq-switch-demo__state {
  font: 600 12px/1 var(--font-mono);
  letter-spacing: 0.08em;
  color: var(--muted);
}

.faq-switch-demo__on { display: none; }
.faq-switch-demo__off { display: inline; }

.faq-switch-demo__input:checked ~ .faq-switch-demo__control .faq-switch-demo__on { display: inline; color: var(--cyan); }
.faq-switch-demo__input:checked ~ .faq-switch-demo__control .faq-switch-demo__off { display: none; }

/* ---------- 平板与桌面 ---------- */
@media (min-width: 780px) {
  .faq-switch__tab {
    padding: 16px 20px 17px;
    font-size: 14.5px;
  }

  .faq-wire {
    padding: 20px;
  }
}

@media (min-width: 960px) {
  .faq-switch__panel {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    column-gap: clamp(36px, 5vw, 76px);
  }

  .faq-switch__panel--4 .faq-panel__col:first-child {
    order: 0;
  }

  .faq-help {
    padding: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .faq-switch__radio:checked ~ .faq-switch__panels > .faq-switch__panel {
    animation: none;
  }

  .faq-wire__tick--on {
    animation: none;
  }

  .faq-switch__tab,
  .faq-switch-demo__track,
  .faq-switch-demo__knob {
    transition: none;
  }
}