.page-faq {
  --faq-idx-w: 204px;
  --faq-gap: clamp(22px, 3vw, 44px);
  --faq-step-line: 1px solid var(--line);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--f-body);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 30px 0 34px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 150% at 92% -20%, rgba(70, 200, 219, 0.16), transparent 58%),
    linear-gradient(158deg, var(--ink-2) 0%, var(--ink) 62%);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  right: -14%;
  top: -30%;
  width: 44%;
  height: 190%;
  background: linear-gradient(180deg, rgba(200, 247, 81, 0.12), rgba(200, 247, 81, 0) 62%);
  transform: rotate(-8deg);
  transform-origin: top right;
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  gap: 26px;
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(36px, 8vw, 74px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-lede {
  margin: 16px 0 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-fact {
  font-size: 13px;
  color: var(--muted);
}

.page-faq .faq-fact .num {
  font-family: var(--f-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--lime);
  margin-right: 3px;
}

.page-faq .faq-shot {
  margin: 0;
  background: var(--ink-2);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 88%);
  overflow: hidden;
}

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

/* ---------- 主体布局 ---------- */
.page-faq .faq-body {
  padding: 24px 0 64px;
}

.page-faq .faq-layout {
  display: grid;
  gap: 18px;
}

/* 索引：窄屏为横向滚动条 */
.page-faq .faq-index {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 2px 0 12px;
  border-bottom: 1px solid var(--line);
  scrollbar-width: thin;
}

.page-faq .faq-index a {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 13px;
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line);
  background: rgba(16, 49, 40, 0.55);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 12% 100%, 0 78%);
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.page-faq .faq-index a:hover,
.page-faq .faq-index a:focus-visible {
  color: var(--paper);
  border-color: var(--lime-dim);
  background: rgba(29, 75, 60, 0.8);
}

.page-faq .faq-index .idx {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--lime);
}

/* ---------- 章节 ---------- */
.page-faq .faq-sec {
  padding: 28px 0 30px;
  border-top: 1px solid var(--line);
  scroll-margin-top: 84px;
}

.page-faq .faq-sec:first-child {
  border-top: 0;
  padding-top: 8px;
}

.page-faq .faq-sec__kicker {
  margin: 0;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-faq .faq-sec h2 {
  margin: 8px 0 8px;
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(25px, 4.4vw, 38px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-sec__sum {
  margin: 0 0 20px;
  max-width: 54ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-prose {
  margin: 0 0 20px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper);
}

/* ---------- 01 入口行 ---------- */
.page-faq .faq-rows {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-row {
  display: grid;
  gap: 6px;
  padding: 15px 16px;
  background: var(--ink-2);
  transition: background 0.18s ease;
}

.page-faq .faq-row:hover {
  background: #144034;
}

.page-faq .faq-row__key {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--home);
}

.page-faq .faq-row__title {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 600;
  color: var(--paper);
}

.page-faq .faq-row p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 02 可勾选步骤 ---------- */
.page-faq .faq-steps {
  counter-reset: stp;
  display: grid;
  gap: 10px;
}

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

.page-faq .faq-step {
  counter-increment: stp;
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) 20px;
  gap: 6px 14px;
  align-items: start;
  padding: 14px 16px 15px 0;
  border: var(--faq-step-line);
  background: linear-gradient(90deg, rgba(16, 49, 40, 0.95), rgba(11, 33, 27, 0.7));
  cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease;
}

.page-faq .faq-step::before {
  content: counter(stp, decimal-leading-zero);
  grid-column: 1;
  grid-row: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  margin-left: -1px;
  font-family: var(--f-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--night);
  background: var(--lime);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 66% 100%, 0 100%);
}

.page-faq .faq-step__body {
  grid-column: 2;
  grid-row: 1;
  padding-top: 3px;
  transition: opacity 0.18s ease;
}

.page-faq .faq-step__title {
  display: block;
  margin-bottom: 4px;
  font-size: 16px;
  font-weight: 600;
  color: var(--paper);
}

.page-faq .faq-step__text {
  display: block;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.page-faq .faq-step__tick {
  grid-column: 3;
  grid-row: 1;
  justify-self: end;
  width: 18px;
  height: 18px;
  margin-top: 6px;
  border: 1px solid var(--line);
  background: transparent;
  transition: background 0.18s ease, border-color 0.18s ease;
}

.page-faq .faq-step:hover {
  border-color: var(--lime-dim);
}

.page-faq .faq-check:focus-visible + .faq-step {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-faq .faq-check:checked + .faq-step {
  background: rgba(11, 33, 27, 0.5);
  border-color: rgba(29, 75, 60, 0.7);
}

.page-faq .faq-check:checked + .faq-step .faq-step__body {
  opacity: 0.42;
}

.page-faq .faq-check:checked + .faq-step::before {
  background: var(--lime-dim);
}

.page-faq .faq-check:checked + .faq-step .faq-step__tick {
  background: var(--lime);
  border-color: var(--lime);
}

/* ---------- 术语注 ---------- */
.page-faq .faq-term {
  position: relative;
  display: inline-block;
  padding: 0 4px;
  font-weight: 600;
  color: var(--ink);
  background: var(--paper);
  border-bottom: 2px solid var(--ink);
  box-shadow: 2px 2px 0 var(--line);
  cursor: help;
}

.page-faq .faq-term__pop {
  position: absolute;
  left: 0;
  top: calc(100% + 9px);
  z-index: 6;
  width: max-content;
  max-width: 250px;
  padding: 8px 10px;
  font-family: var(--f-body);
  font-size: 12px;
  font-weight: 400;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--ink);
  box-shadow: 3px 3px 0 var(--lime);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
}

.page-faq .faq-term:hover .faq-term__pop,
.page-faq .faq-term:focus .faq-term__pop,
.page-faq .faq-term:focus-visible .faq-term__pop {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 20px;
  border: 1px solid var(--line);
  background: var(--ink-2);
}

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

.page-faq .faq-figure .media-caption {
  padding: 9px 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* ---------- 编号清单 ---------- */
.page-faq .faq-list {
  counter-reset: lst;
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-faq .faq-list li {
  counter-increment: lst;
  position: relative;
  padding-left: 34px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--paper);
}

.page-faq .faq-list li::before {
  content: counter(lst, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--away);
}

/* ---------- 05 小指标 ---------- */
.page-faq .faq-mini-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
  margin: 0 0 18px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-mini {
  flex: 1 1 150px;
  display: grid;
  gap: 2px;
  padding: 14px 16px;
  background: var(--ink-2);
}

.page-faq .faq-mini .num {
  font-family: var(--f-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-faq .faq-mini small {
  font-size: 12px;
  color: var(--muted);
}

/* ---------- 06 双栏 ---------- */
.page-faq .faq-split {
  display: grid;
  gap: 14px;
  margin-bottom: 6px;
}

.page-faq .faq-panel {
  padding: 16px 18px;
  background: var(--ink-2);
  border: 1px solid var(--line);
}

.page-faq .faq-panel__title {
  margin: 0 0 8px;
  font-family: var(--f-display);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--lime);
}

.page-faq .faq-panel p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 延伸入口 ---------- */
.page-faq .faq-ext {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  padding-bottom: 3px;
  font-size: 13px;
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid var(--lime-dim);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-faq .faq-ext:hover,
.page-faq .faq-ext:focus-visible {
  color: var(--paper);
  border-color: var(--paper);
}

/* ---------- 07 问答 ---------- */
.page-faq .faq-qa {
  border-top: 1px solid var(--line);
}

.page-faq .faq-qa summary {
  position: relative;
  padding: 14px 28px 14px 0;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-qa summary::after {
  content: "+";
  position: absolute;
  right: 2px;
  top: 12px;
  font-family: var(--f-mono);
  font-size: 17px;
  color: var(--lime);
}

.page-faq .faq-qa[open] summary::after {
  content: "–";
}

.page-faq .faq-qa[open] summary {
  color: var(--lime);
}

.page-faq .faq-qa p {
  margin: 0;
  padding: 0 0 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-cta {
  margin-top: 34px;
  padding: 22px 20px;
  border-left: 4px solid var(--lime);
  background: linear-gradient(102deg, var(--ink-2) 0%, var(--line) 100%);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
}

.page-faq .faq-cta h2 {
  margin: 0 0 8px;
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(22px, 4vw, 30px);
  line-height: 1.1;
  color: var(--paper);
}

.page-faq .faq-cta p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper);
  opacity: 0.82;
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

/* ---------- 平板以上 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-hero {
    padding: 40px 0 46px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: end;
    gap: 34px;
  }

  .page-faq .faq-row {
    grid-template-columns: 72px minmax(0, 1fr);
    align-items: start;
    gap: 4px 14px;
    padding: 17px 18px;
  }

  .page-faq .faq-row__key {
    padding-top: 3px;
  }

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

  .page-faq .faq-qa {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 2px 30px;
    align-items: start;
  }

  .page-faq .faq-qa summary {
    padding: 15px 26px 15px 0;
  }

  .page-faq .faq-qa p {
    padding: 15px 0 15px;
  }

  .page-faq .faq-qa[open] {
    background: rgba(16, 49, 40, 0.55);
  }

  .page-faq .faq-cta {
    padding: 28px 26px;
  }
}

/* ---------- 桌面：右侧索引列 ---------- */
@media (min-width: 1040px) {
  .page-faq .faq-body {
    padding: 34px 0 80px;
  }

  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) var(--faq-idx-w);
    grid-template-areas: "main index";
    align-items: start;
    gap: var(--faq-gap);
  }

  .page-faq .faq-main {
    grid-area: main;
    min-width: 0;
  }

  .page-faq .faq-index {
    grid-area: index;
    position: sticky;
    top: 88px;
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0 0 0 16px;
    border-bottom: 0;
    border-left: 1px solid var(--line);
  }

  .page-faq .faq-index a {
    display: flex;
    align-items: baseline;
    gap: 10px;
    padding: 9px 0;
    font-size: 13px;
    background: transparent;
    border: 0;
    border-bottom: 1px solid transparent;
    clip-path: none;
  }

  .page-faq .faq-index a:hover,
  .page-faq .faq-index a:focus-visible {
    color: var(--paper);
    border-bottom-color: var(--lime-dim);
    background: transparent;
  }

  .page-faq .faq-sec {
    padding: 34px 0 36px;
  }

  .page-faq .faq-step {
    grid-template-columns: 58px minmax(0, 1fr) 22px;
    padding: 16px 20px 17px 0;
  }

  .page-faq .faq-step::before {
    width: 58px;
    height: 58px;
    font-size: 16px;
  }

  .page-faq .faq-prose {
    font-size: 16px;
  }
}