.page-faq {
  --faq-rule: rgba(60, 74, 90, .6);
  --faq-rule-soft: rgba(60, 74, 90, .3);
  --faq-wash: rgba(46, 125, 107, .08);
  background: var(--bg);
  color: var(--fg-soft);
}

.page-faq .container {
  width: min(100% - 10vw, var(--maxw));
  margin-inline: auto;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(24px, 5vw, 56px) 0 0;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 26px;
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: end;
}

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

.page-faq .faq-hero .eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--amber);
  margin: 0 0 14px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.14;
  font-size: clamp(30px, 7vw, 52px);
  color: var(--cream);
  margin: 0 0 18px;
  text-wrap: balance;
}

.page-faq .faq-hero__lede {
  font-size: 17px;
  line-height: 1.85;
  color: var(--fg-soft);
  max-width: 40em;
  margin: 0;
}

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

.page-faq .faq-hero__aside .media-frame {
  margin: 0;
}

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

.page-faq .media-frame__label {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--fg-dim);
}

/* ---------- 分类索引条 ---------- */
.page-faq .faq-index {
  position: sticky;
  top: 0;
  z-index: 9;
  margin-top: clamp(28px, 5vw, 52px);
  background: linear-gradient(180deg, var(--bg) 0%, rgba(11, 27, 51, .96) 100%);
  border-top: 1px solid var(--faq-rule);
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-index__list {
  display: flex;
  align-items: stretch;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0 var(--safe);
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-index__link {
  display: block;
  white-space: nowrap;
  padding: 15px 13px 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--fg-dim);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color var(--t-fast) var(--ease-out), border-color var(--t-fast) var(--ease-out);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--cream);
  border-bottom-color: var(--amber);
}

.page-faq .faq-index__link:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: -2px;
}

/* ---------- 分区 ---------- */
.page-faq .faq-section {
  padding: clamp(44px, 7vw, 80px) 0 0;
  scroll-margin-top: 72px;
}

.page-faq .faq-section__head {
  border-top: 1px solid var(--faq-rule);
  padding-top: 18px;
  margin-bottom: 22px;
}

.page-faq .faq-section__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--amber);
  margin-bottom: 10px;
}

.page-faq .faq-section h2 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.25;
  font-size: clamp(22px, 4.4vw, 32px);
  color: var(--cream);
  margin: 0 0 10px;
  text-wrap: balance;
}

.page-faq .faq-section__intro {
  font-size: 16px;
  line-height: 1.85;
  color: var(--fg-soft);
  max-width: 42em;
  margin: 0;
}

.page-faq .faq-section__intro a,
.page-faq .qa__body a,
.page-faq .note a {
  color: var(--spark);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 198, 168, .5);
  transition: border-color var(--t-fast) var(--ease-out), color var(--t-fast) var(--ease-out);
}

.page-faq .faq-section__intro a:hover,
.page-faq .qa__body a:hover,
.page-faq .note a:hover {
  color: var(--cream);
  border-bottom-color: var(--cream);
}

/* ---------- 问答组 ---------- */
.page-faq .qa-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--faq-rule-soft);
}

.page-faq .qa {
  border-bottom: 1px solid var(--faq-rule-soft);
  border-left: 2px solid transparent;
  background: transparent;
  transition: border-color var(--t-base) var(--ease-out), background-color var(--t-base) var(--ease-out);
}

.page-faq .qa[open] {
  border-left-color: var(--grass);
  background: var(--faq-wash);
}

.page-faq .qa__summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 17px 14px 17px 14px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16.5px;
  line-height: 1.5;
  letter-spacing: -.005em;
  color: var(--cream);
  transition: color var(--t-fast) var(--ease-out);
}

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

.page-faq .qa__summary:hover {
  color: var(--spark);
}

.page-faq .qa__summary:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: -2px;
}

.page-faq .qa__q {
  display: block;
}

.page-faq .qa__mark {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border: 1px solid var(--faq-rule);
  background: var(--bg-raised);
  transition: border-color var(--t-fast) var(--ease-out), background-color var(--t-fast) var(--ease-out);
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--spark);
  transform: translate(-50%, -50%);
  transition: opacity var(--t-fast) var(--ease-out), transform var(--t-fast) var(--ease-out);
}

.page-faq .qa__mark::before {
  width: 8px;
  height: 2px;
}

.page-faq .qa__mark::after {
  width: 2px;
  height: 8px;
}

.page-faq .qa[open] .qa__mark {
  border-color: var(--amber);
  background: var(--night);
}

.page-faq .qa[open] .qa__mark::before {
  background: var(--amber);
}

.page-faq .qa[open] .qa__mark::after {
  opacity: 0;
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .qa__body {
  padding: 0 18px 20px 46px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--fg-soft);
  max-width: 44em;
}

.page-faq .qa__body p {
  margin: 0 0 .9em;
}

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

.page-faq .qa__body code {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .02em;
  color: var(--amber);
}

/* 关键词提示 */
.page-faq .kw {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
  padding: 8px 12px;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: .02em;
}

.page-faq .kw code {
  font-family: var(--font-mono);
  color: var(--ink);
}

.page-faq .kw__label {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--saddle);
}

/* 直角编号步骤 */
.page-faq .steps {
  list-style: none;
  counter-reset: faq-step;
  margin: 0 0 .9em;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .steps li {
  counter-increment: faq-step;
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 12px;
  align-items: start;
  font-size: 15.5px;
  line-height: 1.75;
}

.page-faq .steps li::before {
  content: counter(faq-step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.7;
  color: var(--amber);
  border: 1px solid rgba(232, 163, 61, .55);
  text-align: center;
  padding: 1px 0;
}

/* ---------- 检索章节的错位双栏 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

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

.page-faq .faq-split__aside .media-frame {
  margin: 0 0 18px;
}

.page-faq .note {
  border-left: 1px solid var(--grass);
  padding-left: 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--fg-dim);
  margin: 0;
}

.page-faq .note__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--spark);
  margin-bottom: 6px;
}

/* ---------- 浅色分区 ---------- */
.page-faq .faq-section--light {
  position: relative;
}

.page-faq .faq-section--light::before {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  top: 0;
  bottom: -40px;
  background: var(--cream);
  z-index: 0;
  pointer-events: none;
}

.page-faq .faq-section--light > * {
  position: relative;
  z-index: 1;
}

.page-faq .faq-section--light .faq-section__head {
  border-top-color: rgba(15, 59, 51, .28);
}

.page-faq .faq-section--light .faq-section__num {
  color: var(--saddle);
}

.page-faq .faq-section--light h2 {
  color: var(--ink);
}

.page-faq .faq-section--light .faq-section__intro {
  color: #3A4E48;
}

.page-faq .faq-section--light .qa-list {
  border-top-color: rgba(15, 59, 51, .2);
}

.page-faq .faq-section--light .qa {
  border-bottom-color: rgba(15, 59, 51, .2);
}

.page-faq .faq-section--light .qa[open] {
  border-left-color: var(--grass);
  background: rgba(46, 125, 107, .1);
}

.page-faq .faq-section--light .qa__summary {
  color: var(--ink);
}

.page-faq .faq-section--light .qa__summary:hover {
  color: var(--grass);
}

.page-faq .faq-section--light .qa__mark {
  border-color: rgba(15, 59, 51, .35);
  background: #FFFFFF;
}

.page-faq .faq-section--light .qa__mark::before,
.page-faq .faq-section--light .qa__mark::after {
  background: var(--grass);
}

.page-faq .faq-section--light .qa__body {
  color: #33463F;
}

.page-faq .faq-section--light .qa__body a {
  color: var(--grass);
  border-bottom-color: rgba(46, 125, 107, .5);
}

.page-faq .faq-section--light .qa__body a:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

/* ---------- CTA ---------- */
.page-faq .faq-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: clamp(24px, 4vw, 36px) 0 0;
}

/* ---------- 主题索引 ---------- */
.page-faq .faq-directory {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--faq-rule-soft);
  border: 1px solid var(--faq-rule-soft);
}

.page-faq .faq-directory__cell {
  background: var(--bg);
  padding: 18px 18px 16px;
  min-width: 0;
  transition: background-color var(--t-fast) var(--ease-out);
}

.page-faq .faq-directory__cell:hover {
  background: var(--bg-raised);
}

.page-faq .faq-directory__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  text-decoration: none;
}

.page-faq .faq-directory__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--amber);
}

.page-faq .faq-directory__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16.5px;
  color: var(--cream);
  border-bottom: 2px solid transparent;
  transition: border-color var(--t-fast) var(--ease-out);
}

.page-faq .faq-directory__link:hover .faq-directory__name,
.page-faq .faq-directory__link:focus-visible .faq-directory__name {
  border-bottom-color: var(--spark);
}

.page-faq .faq-directory__desc {
  margin: 8px 0 0 34px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--fg-dim);
}

.page-faq .faq-directory__note {
  margin-top: 24px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-directory {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .qa__summary {
    padding: 20px 20px 20px 18px;
    font-size: 17px;
  }

  .page-faq .qa__body {
    padding: 0 26px 24px 52px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 56px;
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-split__aside {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-index__list {
    padding-inline: max(var(--safe), calc((100vw - var(--maxw)) / 2));
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-directory {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 480px) {
  .page-faq .qa__body {
    padding: 0 14px 18px 16px;
  }

  .page-faq .qa__summary {
    gap: 10px;
    padding: 15px 12px;
    font-size: 16px;
  }

  .page-faq .faq-directory__desc {
    margin-left: 0;
  }

  .page-faq .kw {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__mark,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .faq-index__link,
  .page-faq .faq-directory__cell {
    transition: none;
  }
}