.page-faq {
  --faq-index-w: 268px;
  --faq-gap: clamp(28px, 4vw, 64px);
  --faq-soft: rgba(34, 224, 210, 0.08);
  display: block;
  background: var(--ink-900);
  color: var(--text-body);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 56px) 0 clamp(48px, 7vw, 92px);
  background:
    radial-gradient(120% 90% at 86% 6%, rgba(34, 224, 210, 0.16), transparent 58%),
    radial-gradient(90% 80% at 4% 98%, rgba(255, 122, 46, 0.14), transparent 60%),
    linear-gradient(158deg, #0A1029 0%, #121A3E 58%, #0A1029 100%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -34%;
  width: 78%;
  height: 78%;
  background: linear-gradient(120deg, rgba(74, 46, 143, 0.55), rgba(58, 169, 255, 0.16));
  clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero__grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(35, 48, 102, 0.55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(35, 48, 102, 0.55) 1px, transparent 1px);
  background-size: 76px 76px;
  -webkit-mask-image: radial-gradient(120% 80% at 68% 18%, #000, transparent 72%);
  mask-image: radial-gradient(120% 80% at 68% 18%, #000, transparent 72%);
  opacity: 0.55;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__kicker {
  margin: 26px 0 0;
  font-family: var(--ff-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-hero__title {
  margin: 16px 0 0;
  max-width: 18em;
  color: var(--text-hi);
}

.page-faq .faq-hero__lead {
  margin: 22px 0 0;
  max-width: 60ch;
  font-size: var(--fs-18);
  line-height: 1.75;
  color: var(--text-body);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-body {
  padding: clamp(40px, 6vw, 76px) 0 clamp(56px, 8vw, 104px);
}

.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
}

/* ---------- 左侧主题索引 ---------- */
.page-faq .faq-index {
  padding: 20px 18px 18px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(18, 26, 62, 0.92), rgba(10, 16, 41, 0.92));
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-family: var(--ff-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.08em;
  color: var(--text-idx);
}

.page-faq .faq-index__list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  padding: 9px 8px;
  font-size: var(--fs-15);
  color: var(--text-body);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-index__link:hover {
  color: var(--text-hi);
  background: var(--faq-soft);
  border-left-color: var(--cyan);
}

.page-faq .faq-index__link:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -2px;
  color: var(--text-hi);
}

.page-faq .faq-index__no {
  font-family: var(--ff-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.08em;
  color: var(--lime);
}

.page-faq .faq-index__note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: var(--fs-15);
  line-height: 1.7;
  color: var(--text-idx);
}

.page-faq .faq-index__note a {
  color: var(--cyan);
  text-decoration: none;
}

.page-faq .faq-index__note a:hover {
  text-decoration: underline;
}

/* ---------- 问答流 ---------- */
.page-faq .faq-flow {
  display: grid;
  gap: clamp(44px, 5vw, 76px);
  min-width: 0;
}

.page-faq .faq-block {
  min-width: 0;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-block__head {
  display: grid;
  gap: 12px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-block__kicker {
  margin: 0;
  font-family: var(--ff-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-block__title {
  margin: 0;
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--text-hi);
}

.page-faq .faq-block__lead {
  margin: 0;
  max-width: 62ch;
  font-size: var(--fs-16);
  line-height: 1.75;
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  margin-top: 6px;
}

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

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) 18px;
  gap: 12px;
  align-items: start;
  padding: 18px 4px;
  cursor: pointer;
  list-style: none;
  transition: background var(--dur) var(--ease);
}

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

.page-faq .faq-item > summary:hover {
  background: rgba(34, 224, 210, 0.04);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -2px;
}

.page-faq .faq-item__no {
  padding-top: 4px;
  font-family: var(--ff-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.08em;
  color: var(--text-idx);
}

.page-faq .faq-item__q {
  margin: 0;
  font-size: var(--fs-18);
  font-weight: 600;
  line-height: 1.55;
  color: var(--text-hi);
}

.page-faq .faq-item__sign {
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 5px;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .faq-item__sign::before {
  left: 0;
  right: 0;
  top: 7px;
  height: 1.5px;
}

.page-faq .faq-item__sign::after {
  top: 0;
  bottom: 0;
  left: 7px;
  width: 1.5px;
}

.page-faq .faq-item[open] .faq-item__sign::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-item[open] > summary .faq-item__q {
  color: var(--cyan);
}

.page-faq .faq-item__a {
  padding: 0 4px 20px;
  animation: faq-reveal var(--dur) var(--ease);
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.75;
}

.page-faq .faq-item__a p + p {
  margin-top: 10px;
}

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
}

.page-faq .faq-item__a a:hover {
  text-decoration: underline;
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 窄色带 ---------- */
.page-faq .faq-band {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  margin: 26px 0 0;
  padding: 14px 18px;
  font-size: var(--fs-15);
  line-height: 1.7;
  border-left: 3px solid var(--cyan);
  background: linear-gradient(90deg, rgba(34, 224, 210, 0.16), rgba(74, 46, 143, 0.04));
}

.page-faq .faq-band__label {
  font-family: var(--ff-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-band a {
  color: var(--text-hi);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-band--orange {
  border-left-color: var(--orange);
  background: linear-gradient(90deg, rgba(255, 122, 46, 0.16), rgba(74, 46, 143, 0.04));
}

.page-faq .faq-band--orange .faq-band__label {
  color: var(--orange);
}

.page-faq .faq-band--lime {
  border-left-color: var(--lime);
  background: linear-gradient(90deg, rgba(180, 255, 69, 0.14), rgba(74, 46, 143, 0.04));
}

.page-faq .faq-band--lime .faq-band__label {
  color: var(--lime);
}

/* ---------- 步骤块 ---------- */
.page-faq .faq-split {
  display: grid;
  gap: clamp(24px, 3vw, 40px);
  margin-top: 26px;
}

.page-faq .steps {
  position: relative;
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .steps::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--lime), rgba(35, 48, 102, 0.15));
}

.page-faq .steps__item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 12px 4px;
  border-radius: 2px;
}

.page-faq .steps__item:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 0;
}

.page-faq .steps__no {
  padding: 2px 0;
  text-align: center;
  font-family: var(--ff-mono);
  font-size: var(--fs-15);
  line-height: 1.7;
  letter-spacing: 0.08em;
  color: var(--lime);
  background: var(--ink-900);
}

.page-faq .steps__text {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.7;
  color: var(--text-hi);
}

/* ---------- 图片容器微调 ---------- */
.page-faq .faq-figure {
  margin: 0;
}

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

.page-faq .faq-figure--wide {
  margin-top: 26px;
}

/* ---------- 两种查找方式 ---------- */
.page-faq .faq-paths {
  display: grid;
  gap: 20px;
  margin-top: 26px;
}

.page-faq .faq-path {
  padding: 22px 20px;
  border-top: 2px solid var(--cyan);
  background: linear-gradient(160deg, rgba(18, 26, 62, 0.95), rgba(10, 16, 41, 0.6));
}

.page-faq .faq-path--orange {
  border-top-color: var(--orange);
}

.page-faq .faq-path__no {
  margin: 0;
  font-family: var(--ff-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-path--orange .faq-path__no {
  color: var(--orange);
}

.page-faq .faq-path__title {
  margin: 10px 0 0;
  font-size: var(--fs-24);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.page-faq .faq-path__text {
  margin: 12px 0 0;
  font-size: var(--fs-15);
  line-height: 1.75;
}

/* ---------- 终端表现 ---------- */
.page-faq .faq-devices {
  display: grid;
  gap: 0;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-devices__item {
  display: grid;
  gap: 6px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-devices__name {
  font-size: var(--fs-16);
  font-weight: 600;
  color: var(--text-hi);
}

.page-faq .faq-devices__desc {
  font-size: var(--fs-15);
  line-height: 1.75;
}

.page-faq .faq-devices__note {
  margin: 18px 0 0;
  padding: 14px 16px;
  font-size: var(--fs-15);
  line-height: 1.75;
  border-left: 2px solid var(--blue);
  background: rgba(58, 169, 255, 0.06);
}

/* ---------- 人工协助 ---------- */
.page-faq .faq-contact {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.page-faq .faq-contact__card {
  padding: 20px 18px;
  border: 1px solid var(--line);
  background: rgba(18, 26, 62, 0.72);
}

.page-faq .faq-contact__label {
  margin: 0;
  font-family: var(--ff-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.08em;
  color: var(--text-idx);
}

.page-faq .faq-contact__value {
  margin: 10px 0 0;
  font-size: var(--fs-16);
  font-weight: 600;
  color: var(--text-hi);
  word-break: break-all;
}

.page-faq .faq-contact__value a {
  color: var(--cyan);
  text-decoration: none;
}

.page-faq .faq-contact__value a:hover {
  text-decoration: underline;
}

.page-faq .faq-contact__note {
  margin: 10px 0 0;
  font-size: var(--fs-15);
  line-height: 1.7;
  color: var(--text-idx);
}

.page-faq .faq-subtitle {
  margin: 32px 0 0;
  font-size: var(--fs-18);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.page-faq .faq-checklist {
  display: grid;
  gap: 10px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-checklist li {
  position: relative;
  padding-left: 26px;
  font-size: var(--fs-15);
  line-height: 1.7;
}

.page-faq .faq-checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 10px;
  height: 10px;
  border: 1px solid var(--lime);
  background: rgba(180, 255, 69, 0.16);
}

.page-faq .faq-note {
  margin: 22px 0 0;
  font-size: var(--fs-15);
  line-height: 1.75;
  color: var(--text-idx);
}

.page-faq .faq-note a {
  color: var(--cyan);
  text-decoration: none;
}

.page-faq .faq-note a:hover {
  text-decoration: underline;
}

.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-item__a {
    padding-left: 48px;
  }

  .page-faq .faq-devices__item {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-paths {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 860px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__a {
    animation: none;
  }

  .page-faq .faq-index__link,
  .page-faq .faq-item > summary,
  .page-faq .faq-item__sign::before,
  .page-faq .faq-item__sign::after {
    transition: none;
  }
}