.page-faq {
  --faq-card: var(--ink-night);
  --faq-edge: var(--line-orbit);
  --faq-gap: clamp(14px, 2.4vw, 22px);
  color: var(--star);
  font-family: var(--font-sans);
  padding-bottom: clamp(56px, 9vw, 108px);
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq .crumbs {
  padding-top: 18px;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-intro {
  position: relative;
  padding: clamp(22px, 5vw, 64px) 0 clamp(20px, 3.6vw, 38px);
  border-bottom: 1px solid var(--faq-edge);
  background: radial-gradient(130% 100% at 8% -10%, rgba(122, 92, 255, 0.24), transparent 64%);
}

.page-faq .faq-intro h1 {
  margin: 14px 0 18px;
  font-size: clamp(1.9rem, 6.2vw, 3.5rem);
  font-weight: 300;
  letter-spacing: 0.06em;
  line-height: 1.2;
  max-width: 20em;
}

.page-faq .faq-lede {
  margin: 0;
  max-width: 44em;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--star);
}

.page-faq .faq-quick {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-quick li {
  border-left: 2px solid var(--nebula);
  padding-left: 12px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: var(--dust);
  line-height: 1.7;
}

.page-faq .faq-quick b {
  display: block;
  margin-bottom: 3px;
  font-family: var(--font-sans);
  font-size: 0.98rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--star);
}

/* ---------- 章节索引条 ---------- */

.page-faq .faq-toc {
  position: sticky;
  top: 0;
  z-index: 6;
  margin: 0 calc(-1 * var(--gutter));
  padding: 10px var(--gutter);
  background: rgba(11, 18, 38, 0.95);
  border-bottom: 1px solid var(--faq-edge);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-faq .faq-toc__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
  padding: 8px 12px;
  border: 1px solid var(--faq-edge);
  color: var(--dust);
  font-size: 0.82rem;
  text-decoration: none;
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease), background-color var(--fast) var(--ease);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--pulse);
  border-color: var(--pulse);
  background: rgba(57, 230, 208, 0.08);
}

.page-faq .faq-toc__idx {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--nebula);
}

/* ---------- 章节骨架 ---------- */

.page-faq .faq-section {
  padding: clamp(34px, 6vw, 72px) 0;
  border-bottom: 1px solid var(--faq-edge);
  scroll-margin-top: 68px;
}

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

.page-faq .faq-section__head {
  margin-bottom: clamp(20px, 3.4vw, 34px);
  max-width: 52em;
}

.page-faq .faq-num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--pulse);
}

.page-faq .faq-section h2 {
  margin: 0 0 12px;
  font-size: clamp(1.35rem, 3.6vw, 2.05rem);
  font-weight: 300;
  letter-spacing: 0.05em;
  line-height: 1.34;
}

.page-faq .faq-section__head p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--dust);
}

.page-faq .link {
  color: var(--pulse);
  text-decoration: none;
  border-bottom: 1px solid rgba(57, 230, 208, 0.5);
  transition: border-color var(--fast) var(--ease);
}

.page-faq .link:hover,
.page-faq .link:focus-visible {
  border-bottom-color: var(--pulse);
  border-bottom-width: 2px;
}

/* ---------- 图片 ---------- */

.page-faq .figure {
  margin: 0 0 var(--faq-gap);
}

.page-faq .figure__frame {
  border: 1px solid var(--faq-edge);
  background: linear-gradient(150deg, rgba(122, 92, 255, 0.2), rgba(5, 7, 15, 0.92) 70%);
  overflow: hidden;
}

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

.page-faq .figure__cap {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: var(--dust);
}

.page-faq .faq-figure--cycle {
  margin-top: var(--faq-gap);
}

/* ---------- 三步上手 ---------- */

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

.page-faq .step {
  border: 1px solid var(--faq-edge);
  background: var(--faq-card);
  box-shadow: 6px 6px 0 var(--shadow-deep);
  transition: border-color var(--fast) var(--ease), transform var(--fast) var(--ease);
}

.page-faq .step:hover {
  transform: translate(-2px, -2px);
}

.page-faq .step[open] {
  border-color: var(--nebula);
}

.page-faq .step__summary {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--fast) var(--ease);
}

.page-faq .step[open] .step__summary {
  border-bottom-color: var(--faq-edge);
}

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

.page-faq .step__summary::after {
  content: "展开";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--pulse);
}

.page-faq .step[open] .step__summary::after {
  content: "收起";
}

.page-faq .step__idx {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--pulse);
  flex: none;
}

.page-faq .step__name {
  font-size: 1.04rem;
  letter-spacing: 0.04em;
  color: var(--star);
}

.page-faq .step__meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--dust);
  flex: none;
}

.page-faq .step__flow {
  counter-reset: stepflow;
  list-style: none;
  margin: 0;
  padding: 16px 16px 20px;
  display: grid;
  gap: 13px;
}

.page-faq .step__flow li {
  position: relative;
  counter-increment: stepflow;
  padding-left: 34px;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--dust);
}

.page-faq .step__flow li::before {
  content: counter(stepflow, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  width: 23px;
  height: 23px;
  display: grid;
  place-items: center;
  border: 1px solid var(--faq-edge);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--star);
}

/* ---------- 记录字段表 ---------- */

.page-faq .ledger {
  list-style: none;
  margin: 0 0 var(--faq-gap);
  padding: 0;
  border: 1px solid var(--faq-edge);
  background: var(--faq-card);
}

.page-faq .ledger__row {
  display: grid;
  gap: 5px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--faq-edge);
}

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

.page-faq .ledger__key {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: var(--pulse);
}

.page-faq .ledger__val {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--dust);
}

/* ---------- 说明块 ---------- */

.page-faq .faq-note {
  border: 1px solid var(--faq-edge);
  border-left: 3px solid var(--nebula);
  background: var(--faq-card);
  padding: 16px 18px;
}

.page-faq .faq-note h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--star);
}

.page-faq .faq-note p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.9;
  color: var(--dust);
}

/* ---------- 周期对照 ---------- */

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

.page-faq .cycle {
  display: grid;
  gap: 11px;
  align-content: start;
  padding: 18px 18px 20px;
  border: 1px solid var(--faq-edge);
  background: var(--faq-card);
  box-shadow: 6px 6px 0 var(--shadow-deep);
  transition: border-color var(--fast) var(--ease);
}

.page-faq .cycle:hover {
  border-color: var(--nebula);
}

.page-faq .cycle__name {
  margin: 0;
  font-size: 1.06rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--star);
}

.page-faq .cycle__range {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--dust);
}

.page-faq .cycle__track {
  height: 10px;
  border: 1px solid var(--faq-edge);
  background: var(--ink-deep);
}

.page-faq .cycle__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--nebula), var(--pulse));
}

.page-faq .cycle--w7 .cycle__fill {
  width: 28%;
}

.page-faq .cycle--w30 .cycle__fill {
  width: 62%;
}

.page-faq .cycle--wm .cycle__fill {
  width: 100%;
}

.page-faq .cycle__desc {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.85;
  color: var(--dust);
}

.page-faq .cycle__when {
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed var(--faq-edge);
  font-size: 0.8rem;
  line-height: 1.75;
  color: var(--star);
}

/* ---------- 问答折叠 ---------- */

.page-faq .qa-list {
  display: grid;
  gap: 10px;
}

.page-faq .qa {
  border: 1px solid var(--faq-edge);
  background: var(--faq-card);
  transition: border-color var(--fast) var(--ease);
}

.page-faq .qa[open] {
  border-color: var(--line-orbit);
  border-left: 3px solid var(--pulse);
}

.page-faq .qa__q {
  display: flex;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--star);
  transition: color var(--fast) var(--ease);
}

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

.page-faq .qa__q:hover {
  color: var(--pulse);
}

.page-faq .qa__q::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--pulse);
}

.page-faq .qa[open] .qa__q::after {
  content: "\2212";
}

.page-faq .qa__idx {
  flex: none;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--dust);
}

.page-faq .qa__a {
  padding: 0 16px 18px 50px;
  font-size: 0.9rem;
  line-height: 1.9;
  color: var(--dust);
}

/* ---------- 时间戳卡片 ---------- */

.page-faq .stamp-grid {
  display: grid;
  gap: var(--faq-gap);
  margin-bottom: var(--faq-gap);
}

.page-faq .stamp-card {
  padding: 18px;
  border: 1px solid var(--faq-edge);
  background: var(--faq-card);
  border-top: 3px solid var(--pulse);
}

.page-faq .stamp-card__k {
  display: block;
  margin-bottom: 9px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--pulse);
}

.page-faq .stamp-card__v {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.85;
  color: var(--dust);
}

/* ---------- 自查列表 ---------- */

.page-faq .checklist {
  counter-reset: chk;
  list-style: none;
  margin: 0 0 var(--faq-gap);
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .checklist li {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 12px;
  padding: 15px 16px;
  border: 1px solid var(--faq-edge);
  background: var(--faq-card);
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--dust);
  transition: border-color var(--fast) var(--ease);
}

.page-faq .checklist li:hover {
  border-color: var(--nebula);
}

.page-faq .checklist li::before {
  counter-increment: chk;
  content: counter(chk, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  line-height: 1.9;
  color: var(--pulse);
}

.page-faq .checklist strong {
  color: var(--star);
  font-weight: 500;
}

.page-faq .faq-callout {
  margin-bottom: var(--faq-gap);
  padding: 16px 18px;
  border: 1px solid var(--faq-edge);
  border-left: 3px solid var(--magenta);
  background: var(--faq-card);
}

.page-faq .faq-callout p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.9;
  color: var(--dust);
}

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-faq .faq-quick {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .ledger__row {
    grid-template-columns: 150px minmax(0, 1fr);
    align-items: baseline;
    gap: 8px 18px;
  }

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

@media (min-width: 900px) {
  .page-faq .faq-quick {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

  .page-faq .faq-section__head {
    display: grid;
    grid-template-columns: 1fr;
  }

  .page-faq .faq-section h2 {
    letter-spacing: 0.07em;
  }
}

@media (min-width: 1120px) {
  .page-faq .faq-intro {
    padding-right: 12%;
  }

  .page-faq .qa__a {
    padding-right: 28%;
  }
}