.page-faq {
  --faq-rule: rgba(159, 252, 230, .13);
  --faq-panel: rgba(15, 42, 38, .68);
  --faq-focus: rgba(53, 240, 200, .55);
  padding-bottom: 104px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: 128px;
}

.page-faq .faq-hero .crumbs {
  margin-bottom: 32px;
}

.page-faq .faq-hero__label {
  margin: 0 0 14px;
}

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 6vw, 54px);
  line-height: 1.12;
  letter-spacing: -.01em;
  color: var(--sand-50);
  max-width: 18ch;
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 62ch;
  color: var(--slate-400);
  font-size: 17px;
  line-height: 1.85;
}

/* ---------- 搜索 ---------- */
.page-faq .faq-find {
  margin-top: 32px;
  max-width: 560px;
}

.page-faq .faq-find__label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--slate-400);
}

.page-faq .faq-find__input {
  width: 100%;
  box-sizing: border-box;
  padding: 14px 20px;
  border: 1px solid var(--line-700);
  border-radius: var(--r-pill);
  background: var(--ink-800);
  color: var(--sand-50);
  font-family: var(--font-body);
  font-size: 16px;
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.page-faq .faq-find__input::placeholder {
  color: rgba(138, 147, 166, .8);
}

.page-faq .faq-find__input:focus {
  outline: none;
  border-color: var(--signal-cyan);
  background: var(--block-950);
}

.page-faq .faq-find__hint {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-400);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 36px;
  margin-top: 64px;
}

/* ---------- 索引 ---------- */
.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--slate-400);
}

.page-faq .faq-index__nav {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: none;
}

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

.page-faq .faq-index__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--line-700);
  border-radius: var(--r-pill);
  background: var(--ink-800);
  color: var(--slate-400);
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--faq-focus);
  color: var(--cyan-100);
  background: var(--teal-600);
  outline: none;
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--signal-cyan);
  letter-spacing: .08em;
}

/* ---------- 分组 ---------- */
.page-faq .faq-group + .faq-group {
  margin-top: 76px;
}

.page-faq .faq-group__head {
  margin-bottom: 26px;
  padding-left: 20px;
  border-left: 3px solid var(--teal-600);
}

.page-faq .faq-group__head .label {
  margin: 0 0 10px;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3.6vw, 30px);
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--sand-50);
}

.page-faq .faq-group__desc {
  margin: 12px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate-400);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 28px;
  border: 1px solid var(--line-700);
  border-radius: var(--r-media);
  overflow: hidden;
  background: var(--block-950);
}

.page-faq .faq-figure__frame {
  position: relative;
  overflow: hidden;
}

.page-faq .faq-figure__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(159, 252, 230, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(159, 252, 230, .07) 1px, transparent 1px);
  background-size: 48px 48px;
}

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

.page-faq .faq-figure figcaption {
  padding: 12px 20px;
  border-top: 1px solid var(--line-700);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--slate-400);
}

/* ---------- 问答折叠 ---------- */
.page-faq .qa {
  margin-bottom: 12px;
  border: 1px solid var(--line-700);
  border-radius: var(--r-sub);
  background: var(--ink-800);
  transition: border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}

.page-faq .qa:hover {
  border-color: var(--faq-focus);
}

.page-faq .qa[open] {
  border-color: var(--signal-cyan);
  background: var(--faq-panel);
}

.page-faq .qa__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

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

.page-faq .qa__head:focus-visible {
  outline: 2px solid var(--signal-cyan);
  outline-offset: -2px;
  border-radius: var(--r-sub);
}

.page-faq .qa__no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--signal-cyan);
}

.page-faq .qa__q {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--sand-50);
}

.page-faq .qa__mark {
  position: relative;
  width: 18px;
  height: 18px;
  flex: none;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  margin-top: -1px;
  border-radius: 2px;
  background: var(--signal-cyan);
  transition: transform var(--t-fast) var(--ease), opacity var(--t-fast) var(--ease);
}

.page-faq .qa__mark::after {
  transform: rotate(90deg);
}

.page-faq .qa[open] .qa__mark::after {
  transform: rotate(0deg);
  opacity: 0;
}

.page-faq .qa__body {
  padding: 0 20px 22px 56px;
}

.page-faq .qa__body p {
  margin: 0 0 12px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--sand-50);
}

.page-faq .qa__body p:last-child {
  margin-bottom: 0;
}

.page-faq .qa__body strong {
  color: var(--cyan-100);
  font-weight: 700;
}

/* ---------- 步骤列表 ---------- */
.page-faq .steps {
  margin: 14px 0 12px;
  padding: 0;
  list-style: none;
  counter-reset: step;
  display: grid;
  gap: 12px;
}

.page-faq .steps li {
  position: relative;
  counter-increment: step;
  padding-left: 34px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--sand-50);
}

.page-faq .steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 4px;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border: 1px solid var(--teal-600);
  border-radius: 50%;
  background: rgba(12, 107, 90, .38);
  color: var(--cyan-100);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  line-height: 1;
}

.page-faq .steps li::after {
  content: "";
  position: absolute;
  left: 11px;
  top: 30px;
  bottom: -12px;
  width: 0;
  border-left: 1px dashed var(--faq-rule);
}

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

.page-faq .qa__body .link {
  color: var(--signal-cyan);
}

/* ---------- 兜底区块 ---------- */
.page-faq .faq-fallback {
  margin-top: 88px;
  padding: 32px 24px;
  border: 1px solid rgba(255, 122, 47, .42);
  border-radius: var(--r-card);
  background:
    linear-gradient(155deg, rgba(255, 122, 47, .14), rgba(255, 122, 47, 0) 62%),
    var(--ink-800);
}

.page-faq .faq-fallback__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3.6vw, 30px);
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--sand-50);
}

.page-faq .faq-fallback__lead {
  margin: 16px 0 0;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--sand-50);
}

.page-faq .faq-contacts {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq .faq-contacts__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 14px 16px;
  border: 1px solid var(--line-700);
  border-radius: var(--r-sub);
  background: rgba(10, 31, 27, .6);
}

.page-faq .faq-contacts__key {
  flex: 0 0 auto;
  min-width: 68px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--slate-400);
}

.page-faq .faq-contacts__val {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--cyan-100);
  word-break: break-all;
}

.page-faq .faq-fallback__note {
  margin: 22px 0 0;
  max-width: 66ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate-400);
}

.page-faq .faq-fallback__note .link {
  color: var(--alert-orange);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding-top: 152px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 248px minmax(0, 1fr);
    gap: 64px;
    margin-top: 80px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 104px;
  }

  .page-faq .faq-index__nav {
    display: block;
    position: relative;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__nav::before {
    content: "";
    position: absolute;
    left: 0;
    top: 16px;
    bottom: 16px;
    width: 1px;
    background: var(--line-700);
  }

  .page-faq .faq-index__link {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    width: 100%;
    padding: 10px 12px 10px 22px;
    border: 0;
    border-radius: var(--r-sub);
    background: transparent;
    white-space: normal;
  }

  .page-faq .faq-index__link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 10px;
    height: 1px;
    background: var(--line-700);
    transition: width var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    background: rgba(12, 107, 90, .22);
    color: var(--sand-50);
  }

  .page-faq .faq-index__link:hover::before,
  .page-faq .faq-index__link:focus-visible::before {
    width: 16px;
    background: var(--signal-cyan);
  }

  .page-faq .faq-index__txt {
    font-size: 14px;
    line-height: 1.5;
  }

  .page-faq .qa__body {
    padding: 0 26px 26px 60px;
  }

  .page-faq .faq-fallback {
    padding: 44px 40px;
  }
}

@media (min-width: 1160px) {
  .page-faq .faq-layout {
    grid-template-columns: 272px minmax(0, 1fr);
    gap: 80px;
  }
}

/* ---------- 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .faq-index__link,
  .page-faq .faq-index__link::before,
  .page-faq .faq-find__input {
    transition: none;
  }
}