.page-faq {
  padding: clamp(20px, 3vw, 36px) 0 clamp(64px, 9vw, 128px);
}

.page-faq img {
  max-width: 100%;
  height: auto;
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(28px, 5vw, 44px);
}

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

@media (min-width: 1040px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) 236px;
    column-gap: clamp(36px, 4.4vw, 76px);
    align-items: start;
  }
}

/* ---------- 章节索引牌 ---------- */

.page-faq .faq-index {
  order: -1;
  min-width: 0;
}

.page-faq .faq-index-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--paper-300);
}

.page-faq .faq-index-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index-link {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  padding: 8px 12px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--paper-300);
  text-decoration: none;
  border: 1px solid var(--line-500);
  border-radius: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--slate-700);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--lime-400);
  border-color: var(--lime-400);
  background: var(--ink-800);
}

.page-faq .faq-index-link:hover .faq-index-num,
.page-faq .faq-index-link:focus-visible .faq-index-num {
  color: var(--lime-400);
}

@media (min-width: 1040px) {
  .page-faq .faq-index {
    order: 0;
    position: sticky;
    top: calc(var(--header-h) + 32px);
    align-self: start;
  }

  .page-faq .faq-index-list {
    display: block;
    border-top: 1px solid var(--line-500);
  }

  .page-faq .faq-index-link {
    display: flex;
    width: 100%;
    padding: 12px 6px 12px 0;
    border: 0;
    border-bottom: 1px solid var(--line-500);
    border-radius: 0;
    background: none;
  }

  .page-faq .faq-index-link:hover,
  .page-faq .faq-index-link:focus-visible {
    background: none;
    border-color: var(--lime-400);
    transform: translateX(2px);
  }
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  margin-top: clamp(20px, 3vw, 34px);
}

.page-faq .faq-title {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-size: clamp(34px, 5.6vw, 72px);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.01em;
  color: var(--paper-050);
}

.page-faq .faq-lead {
  max-width: 62ch;
  margin: 20px 0 0;
  font-size: clamp(16px, 1.4vw, 18px);
  line-height: 1.85;
  color: var(--paper-050);
}

.page-faq .faq-hero-note {
  max-width: 62ch;
  margin: 14px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--lime-400);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--paper-300);
}

.page-faq .faq-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

/* ---------- 区块通用 ---------- */

.page-faq .faq-section {
  margin-top: clamp(56px, 7vw, 104px);
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.page-faq .faq-section-head {
  padding-top: 22px;
  border-top: 1px solid var(--line-500);
}

.page-faq .faq-section-head .section-title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -0.005em;
  color: var(--paper-050);
}

.page-faq .faq-section-lead {
  max-width: 64ch;
  margin: 12px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--paper-300);
}

/* ---------- 三步操作路径 ---------- */

.page-faq .faq-steps-media {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  margin-top: clamp(28px, 3.4vw, 44px);
}

@media (min-width: 900px) {
  .page-faq .faq-steps-media {
    grid-template-columns: minmax(0, 1fr) 268px;
    align-items: start;
  }
}

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

@media (min-width: 680px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-faq .faq-step {
  position: relative;
  padding: 30px 0 0;
  border-top: 1px solid var(--line-500);
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  background: var(--lime-400);
}

@media (min-width: 680px) {
  .page-faq .faq-step {
    padding: 30px 26px 0 0;
  }

  .page-faq .faq-step + .faq-step {
    padding-left: 26px;
    border-left: 1px solid var(--line-500);
  }
}

@media (max-width: 679px) {
  .page-faq .faq-step + .faq-step {
    margin-top: 28px;
  }
}

.page-faq .faq-step-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  color: var(--lime-400);
}

.page-faq .faq-step-title {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--paper-050);
}

.page-faq .faq-step-body {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--paper-300);
}

/* ---------- 图片 ---------- */

.page-faq .faq-figure {
  margin: 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-500);
  border-radius: 2px;
  background: var(--ink-800);
}

.page-faq .faq-figure figcaption {
  margin-top: 12px;
  padding-left: 12px;
  border-left: 1px solid var(--line-500);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--paper-300);
}

.page-faq .faq-figure--wide {
  margin-top: clamp(26px, 3vw, 40px);
}

/* ---------- 问答列表 ---------- */

.page-faq .faq-list {
  margin-top: clamp(24px, 3vw, 36px);
  border-top: 1px solid var(--line-500);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line-500);
  transition: background-color var(--dur) var(--ease);
}

.page-faq .faq-item[open] {
  background: var(--ink-800);
}

.page-faq .faq-q {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 46px 18px 14px;
  font-size: 16.5px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--paper-050);
  cursor: pointer;
  list-style: none;
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-q::after {
  content: "+";
  position: absolute;
  top: 16px;
  right: 16px;
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1;
  color: var(--lime-400);
}

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

.page-faq .faq-q:hover,
.page-faq .faq-q:focus-visible {
  color: var(--lime-400);
}

.page-faq .faq-mark {
  flex: none;
  width: 8px;
  height: 8px;
  margin-top: 9px;
  background: var(--lime-400);
}

.page-faq .faq-list--orange .faq-mark {
  background: var(--orange-500);
}

.page-faq .faq-a {
  padding: 0 46px 24px 36px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--paper-300);
}

.page-faq .faq-a p {
  margin: 0 0 12px;
}

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

.page-faq .faq-a strong {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--paper-050);
}

.page-faq .faq-a a {
  color: var(--lime-400);
  text-decoration: none;
  border-bottom: 1px solid var(--line-500);
  transition: border-color var(--dur) var(--ease);
}

.page-faq .faq-a a:hover,
.page-faq .faq-a a:focus-visible {
  border-color: var(--lime-400);
}

/* ---------- 术语速查 ---------- */

.page-faq .faq-terms {
  position: relative;
  margin-top: clamp(24px, 3vw, 36px);
}

.page-faq .faq-term-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  padding: 0;
  opacity: 0;
  pointer-events: none;
}

.page-faq .faq-term-tabs {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--line-500);
}

.page-faq .faq-term-tab {
  padding: 12px 18px;
  font-size: 14px;
  letter-spacing: 0.05em;
  color: var(--paper-300);
  border: 1px solid var(--line-500);
  border-bottom: 0;
  margin-right: -1px;
  margin-bottom: -1px;
  border-radius: 2px 2px 0 0;
  cursor: pointer;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-faq .faq-term-tab:hover {
  color: var(--lime-400);
  border-color: var(--lime-400);
}

.page-faq #term-qd:checked ~ .faq-term-tabs label[for="term-qd"],
.page-faq #term-yw:checked ~ .faq-term-tabs label[for="term-yw"],
.page-faq #term-kq:checked ~ .faq-term-tabs label[for="term-kq"],
.page-faq #term-cq:checked ~ .faq-term-tabs label[for="term-cq"] {
  position: relative;
  z-index: 1;
  color: var(--ink-900);
  background: var(--lime-400);
  border-color: var(--lime-400);
}

.page-faq #term-qd:focus-visible ~ .faq-term-tabs label[for="term-qd"],
.page-faq #term-yw:focus-visible ~ .faq-term-tabs label[for="term-yw"],
.page-faq #term-kq:focus-visible ~ .faq-term-tabs label[for="term-kq"],
.page-faq #term-cq:focus-visible ~ .faq-term-tabs label[for="term-cq"] {
  outline: 2px solid var(--lime-400);
  outline-offset: 2px;
}

.page-faq .faq-term-panels {
  padding-top: 24px;
}

.page-faq .faq-term-panel {
  display: none;
}

.page-faq .faq-term-panel[data-term="qd"] {
  display: block;
}

.page-faq #term-yw:checked ~ .faq-term-panels .faq-term-panel[data-term="qd"],
.page-faq #term-kq:checked ~ .faq-term-panels .faq-term-panel[data-term="qd"],
.page-faq #term-cq:checked ~ .faq-term-panels .faq-term-panel[data-term="qd"] {
  display: none;
}

.page-faq #term-yw:checked ~ .faq-term-panels .faq-term-panel[data-term="yw"],
.page-faq #term-kq:checked ~ .faq-term-panels .faq-term-panel[data-term="kq"],
.page-faq #term-cq:checked ~ .faq-term-panels .faq-term-panel[data-term="cq"] {
  display: block;
}

.page-faq .faq-term-def {
  margin: 0 0 22px;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--paper-050);
}

.page-faq .faq-term-meta {
  margin: 0;
  border-top: 1px solid var(--line-500);
}

.page-faq .faq-term-row {
  display: grid;
  gap: 6px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-500);
}

@media (min-width: 640px) {
  .page-faq .faq-term-row {
    grid-template-columns: 128px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }
}

.page-faq .faq-term-row dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--paper-300);
}

.page-faq .faq-term-row dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--paper-050);
}

/* ---------- 底部行动区 ---------- */

.page-faq .faq-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
  margin-top: clamp(56px, 7vw, 104px);
  padding: clamp(22px, 3vw, 34px);
  background: var(--ink-800);
  border: 1px solid var(--line-500);
  border-left: 3px solid var(--lime-400);
  border-radius: 2px;
}

.page-faq .faq-cta-text {
  flex: 1 1 320px;
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--paper-050);
}

@media (max-width: 559px) {
  .page-faq .faq-cta .btn {
    width: 100%;
    text-align: center;
  }
}