.page-faq {
  --faq-text: #3A4552;
  --faq-rule: rgba(20, 38, 61, 0.14);
  --faq-rule-strong: rgba(20, 38, 61, 0.3);
  --faq-corner: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  background: var(--c-ink);
  color: var(--c-porcelain);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 32px 0 52px;
  background: var(--c-ink);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(155deg, rgba(30, 58, 95, 0.94) 0%, rgba(20, 38, 61, 0.6) 46%, rgba(14, 27, 44, 0) 74%);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, var(--line-faint) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, var(--line-faint) 0 1px, transparent 1px 96px);
  pointer-events: none;
}

.page-faq .faq-hero > .container {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 28px;
  margin-top: 22px;
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 6.6vw, 3.4rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--c-porcelain);
}

.page-faq .faq-hero__intro {
  margin: 0;
  max-width: 54ch;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: rgba(246, 243, 236, 0.82);
}

.page-faq .faq-hero__index {
  padding: 18px 16px;
  border: 1px solid var(--line-strong);
  background: rgba(30, 58, 95, 0.5);
  clip-path: var(--faq-corner);
}

.page-faq .faq-index__title {
  margin: 0 0 6px;
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--c-amber);
  text-transform: uppercase;
}

.page-faq .faq-index {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__item + .faq-index__item {
  border-top: 1px solid var(--line);
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0;
  font-size: var(--fs-14);
  color: var(--c-porcelain);
  text-decoration: none;
  transition: color 200ms var(--ease);
}

.page-faq .faq-index__num {
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--c-amber);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--c-amber-lt);
}

.page-faq .faq-index__link:hover .faq-index__label {
  text-decoration: underline;
  text-decoration-color: var(--c-amber);
  text-underline-offset: 4px;
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-faq .faq-stat {
  padding: 14px 16px;
  background: rgba(14, 27, 44, 0.88);
}

.page-faq .faq-stat:last-child {
  grid-column: span 2;
}

.page-faq .faq-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-22);
  letter-spacing: 0.02em;
  color: var(--c-amber-lt);
}

.page-faq .faq-stat__label {
  display: block;
  margin-top: 4px;
  font-size: var(--fs-12);
  color: rgba(246, 243, 236, 0.7);
}

/* ---------- 文档正文区 ---------- */
.page-faq .faq-body {
  padding: 0 0 72px;
  background: var(--c-porcelain);
  color: var(--c-deep);
}

.page-faq .faq-body__grid {
  display: grid;
  gap: 30px;
  padding-top: 44px;
}

.page-faq .faq-toc {
  border: 1px solid var(--faq-rule-strong);
  background: var(--c-paper);
  padding: 18px 16px;
  clip-path: var(--faq-corner);
}

.page-faq .faq-toc__title {
  margin: 0 0 10px;
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--c-indigo);
}

.page-faq .faq-toc__list {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-toc__list::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: var(--faq-rule-strong);
}

.page-faq .faq-toc__link {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 0;
  font-size: var(--fs-14);
  color: var(--c-deep);
  text-decoration: none;
  transition: color 200ms var(--ease);
}

.page-faq .faq-toc__num {
  display: inline-block;
  min-width: 30px;
  padding-right: 6px;
  font-size: var(--fs-12);
  color: var(--c-indigo);
  background: var(--c-paper);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--c-indigo);
}

.page-faq .faq-toc__link:hover .faq-toc__num {
  color: var(--c-ochre);
  background: var(--c-paper);
  border-bottom: 1px solid var(--c-amber);
}

.page-faq .faq-toc__cta {
  display: block;
  margin-top: 14px;
  padding: 11px 14px;
  background: var(--c-deep);
  color: var(--c-porcelain);
  font-size: var(--fs-14);
  text-align: center;
  text-decoration: none;
  border-radius: 2px;
  clip-path: var(--faq-corner);
  transition: background 200ms var(--ease);
}

.page-faq .faq-toc__cta:hover,
.page-faq .faq-toc__cta:focus-visible {
  background: var(--c-indigo);
}

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

.page-faq .faq-sec {
  padding: 32px 0;
  border-top: 1px solid var(--faq-rule);
}

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

.page-faq .faq-sec__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 14px;
}

.page-faq .faq-sec__num {
  flex: none;
  padding-bottom: 2px;
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--c-indigo);
  border-bottom: 2px solid var(--c-amber);
}

.page-faq .faq-sec h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.3rem, 2.6vw, 1.95rem);
  line-height: 1.32;
  color: var(--c-ink);
}

.page-faq .faq-sec__lead {
  max-width: 66ch;
  margin: 0 0 20px;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--faq-text);
}

.page-faq .faq-body .figure {
  margin: 0 0 22px;
  border: 1px solid var(--faq-rule);
  background: var(--c-paper);
}

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

.page-faq .faq-body .figure__caption {
  padding: 10px 14px;
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--c-rock);
  border-top: 1px solid var(--faq-rule);
}

/* 主题目录 */
.page-faq .faq-topics {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--faq-rule-strong);
}

.page-faq .faq-topic {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 2px 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-topic__num {
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--c-indigo);
}

.page-faq .faq-topic__name {
  font-size: var(--fs-16);
  font-weight: 600;
  color: var(--c-ink);
}

.page-faq .faq-topic__count {
  grid-column: 2;
  font-size: var(--fs-12);
  color: var(--c-rock);
}

/* 三步走 */
.page-faq .faq-steps {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step {
  position: relative;
  display: grid;
  gap: 12px;
  padding-bottom: 26px;
}

.page-faq .faq-step:last-child {
  padding-bottom: 0;
}

.page-faq .faq-step:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 21px;
  top: 52px;
  bottom: 2px;
  width: 1px;
  background: var(--faq-rule-strong);
}

.page-faq .faq-step__num {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-faq .faq-step__num .mono {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--c-deep);
  color: var(--c-amber-lt);
  font-size: var(--fs-18);
  border-radius: 2px;
}

.page-faq .faq-step__label {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--c-rock);
}

.page-faq .faq-step__body {
  padding: 16px 18px;
  background: var(--c-paper);
  border: 1px solid var(--faq-rule);
  clip-path: var(--faq-corner);
}

.page-faq .faq-step__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-18);
  line-height: 1.5;
  color: var(--c-ink);
}

.page-faq .faq-step__body p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--faq-text);
}

.page-faq .faq-step__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px dashed var(--faq-rule-strong);
}

.page-faq .faq-step__ref {
  font-size: var(--fs-12);
  color: var(--c-indigo);
  letter-spacing: 0.02em;
}

.page-faq .copy-btn {
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--c-indigo);
  background: transparent;
  border: 1px solid var(--faq-rule-strong);
  border-radius: 2px;
  cursor: pointer;
  transition: color 200ms var(--ease), border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-faq .copy-btn:hover,
.page-faq .copy-btn:focus-visible {
  color: var(--c-ink);
  border-color: var(--c-amber);
  background: rgba(217, 164, 65, 0.14);
}

/* 版本回溯 */
.page-faq .faq-versions .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--faq-rule-strong);
}

.page-faq .faq-versions .tabs__tab {
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.04em;
  color: var(--c-deep);
  background: transparent;
  border: 1px solid var(--faq-rule-strong);
  border-radius: 2px;
  cursor: pointer;
  transition: color 200ms var(--ease), background 200ms var(--ease), border-color 200ms var(--ease);
}

.page-faq .faq-versions .tabs__tab:hover,
.page-faq .faq-versions .tabs__tab:focus-visible {
  border-color: var(--c-amber);
  color: var(--c-ink);
}

.page-faq .faq-versions .tabs__tab[aria-selected="true"] {
  color: var(--c-amber-lt);
  background: var(--c-deep);
  border-color: var(--c-deep);
}

.page-faq .faq-vpanel {
  padding: 16px 18px;
  background: var(--c-paper);
  border-left: 3px solid var(--c-amber);
}

.page-faq .faq-vpanel__meta {
  margin: 0 0 8px;
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--c-indigo);
}

.page-faq .faq-vpanel__text {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--faq-text);
}

/* 设置项 */
.page-faq .faq-settings {
  display: grid;
  gap: 1px;
  border: 1px solid var(--faq-rule-strong);
  background: var(--faq-rule);
}

.page-faq .faq-set {
  padding: 16px 18px;
  background: var(--c-paper);
}

.page-faq .faq-set__num {
  margin: 0;
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--c-indigo);
}

.page-faq .faq-set__title {
  margin: 4px 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-18);
  color: var(--c-ink);
}

.page-faq .faq-set__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-set__list li {
  position: relative;
  padding-left: 14px;
  margin-bottom: 5px;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--faq-text);
}

.page-faq .faq-set__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 6px;
  height: 1px;
  background: var(--c-amber);
}

.page-faq .faq-inline-link {
  color: var(--c-indigo);
  text-decoration: underline;
  text-decoration-color: var(--c-amber);
  text-underline-offset: 3px;
}

.page-faq .faq-tip {
  margin-top: 16px;
  padding: 14px 16px;
  border-left: 3px solid var(--c-teal);
  background: rgba(62, 127, 114, 0.09);
}

.page-faq .faq-tip p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--faq-text);
}

.page-faq .faq-tip strong {
  color: var(--c-teal);
}

/* 增量与标注 */
.page-faq .faq-updates {
  display: grid;
  gap: 18px;
  margin-bottom: 20px;
}

.page-faq .faq-update {
  padding-top: 12px;
  border-top: 2px solid var(--c-amber);
}

.page-faq .faq-update__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-16);
  color: var(--c-ink);
}

.page-faq .faq-update__text {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--faq-text);
}

.page-faq .faq-badges {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-badge {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--faq-rule);
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--faq-text);
}

.page-faq .faq-badge__key {
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--c-indigo);
}

/* 转人工 */
.page-faq .faq-sec--escalate {
  margin: 32px 0 8px;
  padding: 24px 20px;
  border: 1px solid var(--c-amber);
  background: var(--c-ink);
  clip-path: var(--faq-corner);
}

.page-faq .faq-sec--escalate .faq-sec__num {
  color: var(--c-amber);
  border-bottom-color: var(--c-amber);
}

.page-faq .faq-sec--escalate h2 {
  color: var(--c-porcelain);
}

.page-faq .faq-sec--escalate .faq-sec__lead {
  color: rgba(246, 243, 236, 0.82);
}

.page-faq .faq-checklist {
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-checklist__item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 7px 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: rgba(246, 243, 236, 0.86);
  border-top: 1px solid var(--line);
}

.page-faq .faq-checklist__item .mono {
  flex: none;
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--c-amber);
}

.page-faq .faq-escalate__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.page-faq .faq-escalate__actions .text-btn {
  color: var(--c-amber-lt);
}

/* 相关栏目 */
.page-faq .faq-rel {
  margin-top: 36px;
  padding-top: 22px;
  border-top: 1px solid var(--faq-rule-strong);
}

.page-faq .faq-rel__title {
  margin: 0 0 12px;
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--c-indigo);
}

.page-faq .faq-rel__list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-rel__link {
  display: block;
  height: 100%;
  padding: 14px 16px;
  background: var(--c-paper);
  border: 1px solid var(--faq-rule);
  border-left: 2px solid var(--c-indigo);
  text-decoration: none;
  transition: border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-faq .faq-rel__link:hover,
.page-faq .faq-rel__link:focus-visible {
  border-left-color: var(--c-amber);
  background: #F1EBE0;
}

.page-faq .faq-rel__link-title {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-16);
  color: var(--c-ink);
}

.page-faq .faq-rel__link-desc {
  display: block;
  margin-top: 5px;
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--c-rock);
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-faq .faq-topic {
    grid-template-columns: 56px minmax(0, 1fr) auto;
    align-items: baseline;
  }

  .page-faq .faq-topic__count {
    grid-column: 3;
    white-space: nowrap;
  }

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

@media (min-width: 760px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-faq .faq-stat:last-child {
    grid-column: auto;
  }

  .page-faq .faq-hero {
    padding: 44px 0 64px;
  }

  .page-faq .faq-step {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 20px;
  }

  .page-faq .faq-step:not(:last-child)::after {
    left: 21px;
    top: 54px;
    bottom: 6px;
  }

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

  .page-faq .faq-updates {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: 1.35fr 0.85fr;
    gap: 52px;
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body__grid {
    grid-template-columns: 268px minmax(0, 1fr);
    gap: 56px;
    padding-top: 56px;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-faq .faq-rel__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-toc__link,
  .page-faq .faq-toc__cta,
  .page-faq .copy-btn,
  .page-faq .faq-versions .tabs__tab,
  .page-faq .faq-rel__link {
    transition: none;
  }
}