.page-faq {
  --faq-rail: 264px;
  --faq-gap: clamp(28px, 4vw, 60px);
  --faq-rule: var(--concrete-lt);
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb-wrap {
  padding-top: clamp(18px, 2.6vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(20px, 3vw, 34px) 0 clamp(32px, 5vw, 60px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(24px, 3.6vw, 52px);
  align-items: end;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 5.2vw, 52px);
  line-height: 1.1;
  letter-spacing: -0.012em;
  color: var(--ink);
  margin: 14px 0 0;
  max-width: 20ch;
}

.page-faq .faq-hero__text {
  margin-top: 18px;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-faq .faq-hero__figure {
  margin: 0;
  border: 1px solid var(--faq-rule);
  background: var(--warm);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 关键词筛选 ---------- */
.page-faq .faq-filter {
  margin-top: clamp(26px, 4vw, 44px);
  padding-top: 18px;
  border-top: 1px solid var(--faq-rule);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 16px;
}

.page-faq .faq-filter__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--concrete);
  flex: none;
}

.page-faq .faq-filter__input {
  flex: 1 1 260px;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--faq-rule);
  padding: 11px 14px;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-faq .faq-filter__input:focus {
  outline: none;
  border-color: var(--green);
  box-shadow: 0 0 0 2px rgba(18, 118, 74, 0.16);
}

.page-faq .faq-filter__hint {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--concrete);
  font-variant-numeric: tabular-nums;
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  padding-bottom: clamp(44px, 6vw, 88px);
}

.page-faq .faq-body__inner {
  display: grid;
  gap: var(--faq-gap);
  align-items: start;
}

/* ---------- 主题目录 ---------- */
.page-faq .faq-toc {
  border: 1px solid var(--faq-rule);
  background: #fff;
}

.page-faq .faq-toc__head {
  margin: 0;
  padding: 15px 18px 12px;
  border-bottom: 1px solid var(--faq-rule);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--concrete);
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 6px 0;
}

.page-faq .faq-toc__link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 11px 18px;
  border-left: 2px solid transparent;
  color: var(--ink);
  text-decoration: none;
  font-size: 14.5px;
  line-height: 1.5;
  transition: background-color 0.25s var(--ease), border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.page-faq .faq-toc__link:hover {
  background: rgba(18, 118, 74, 0.06);
}

.page-faq .faq-toc__link[aria-current="true"] {
  border-left-color: var(--green);
  color: var(--green);
  background: rgba(18, 118, 74, 0.08);
}

.page-faq .faq-toc__count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--concrete);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-toc__foot {
  margin: 0;
  padding: 14px 18px 16px;
  border-top: 1px solid var(--faq-rule);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-toc__foot a {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid rgba(18, 118, 74, 0.35);
}

.page-faq .faq-toc__foot a:hover {
  border-bottom-color: var(--green);
}

/* ---------- 问答分类 ---------- */
.page-faq .faq-main {
  min-width: 0;
}

.page-faq .faq-cat + .faq-cat {
  margin-top: clamp(38px, 5vw, 68px);
}

.page-faq .faq-cat__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--green-deep);
}

.page-faq .faq-cat__index {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--signal);
  flex: none;
}

.page-faq .faq-cat__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
  flex: 1 1 auto;
}

.page-faq .faq-cat__meta {
  flex: none;
  font-size: 12px;
  color: var(--concrete);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-cat__lead {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-faq .faq-cat__figure {
  margin: clamp(24px, 3.4vw, 40px) 0 0;
  border: 1px solid var(--faq-rule);
  background: var(--warm);
  overflow: hidden;
}

.page-faq .faq-cat__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

/* ---------- 折叠面板 ---------- */
.page-faq .faq-list {
  margin-top: 14px;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-rule);
  border-left: 2px solid transparent;
  transition: border-color 0.3s var(--ease), background-color 0.3s var(--ease);
}

.page-faq .faq-item[open] {
  border-left-color: var(--green);
  background: rgba(18, 118, 74, 0.035);
}

.page-faq .faq-item__summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 17px 16px 17px 14px;
  cursor: pointer;
  list-style: none;
  color: var(--ink);
  transition: color 0.25s var(--ease);
}

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

.page-faq .faq-item__summary::marker {
  content: "";
}

.page-faq .faq-item__summary:hover {
  color: var(--green);
}

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

.page-faq .faq-item__num {
  flex: none;
  font-size: 12px;
  line-height: 1.9;
  color: var(--concrete);
  font-variant-numeric: tabular-nums;
  transition: color 0.25s var(--ease);
}

.page-faq .faq-item[open] .faq-item__num {
  color: var(--green);
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 16px;
  line-height: 1.6;
  font-weight: 600;
}

.page-faq .faq-item__summary::after {
  content: "";
  flex: none;
  width: 9px;
  height: 9px;
  margin-top: 8px;
  border-right: 2px solid var(--concrete);
  border-bottom: 2px solid var(--concrete);
  transform: rotate(45deg);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-faq .faq-item[open] .faq-item__summary::after {
  transform: rotate(-135deg);
  border-color: var(--green);
}

.page-faq .faq-item__panel {
  padding: 0 20px 20px 42px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-faq .faq-item__panel p {
  margin: 0 0 0.8em;
}

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

.page-faq .faq-steps {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: faq-step;
  border-left: 1px solid var(--faq-rule);
}

.page-faq .faq-steps li {
  counter-increment: faq-step;
  position: relative;
  padding: 0 0 10px 34px;
  font-size: 15px;
  line-height: 1.75;
}

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

.page-faq .faq-steps li::before {
  content: counter(faq-step, decimal-leading-zero);
  position: absolute;
  left: 12px;
  top: 1px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--signal);
  font-variant-numeric: tabular-nums;
}

/* ---------- 页尾帮助带 ---------- */
.page-faq .faq-help {
  background: var(--green-deep);
  color: var(--warm);
  padding: clamp(42px, 6vw, 76px) 0;
}

.page-faq .faq-help__eyebrow {
  color: rgba(247, 245, 239, 0.62);
}

.page-faq .faq-help__eyebrow::before {
  background: var(--signal);
}

.page-faq .faq-help__grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}

.page-faq .faq-help__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: #fff;
  max-width: 20ch;
}

.page-faq .faq-help__text {
  margin: 16px 0 0;
  max-width: 54ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(247, 245, 239, 0.78);
}

.page-faq .faq-help__panel {
  border: 1px solid rgba(247, 245, 239, 0.2);
  background: rgba(7, 42, 33, 0.42);
  padding: clamp(20px, 3vw, 30px);
}

.page-faq .faq-help__contact {
  margin: 0;
  padding: 0;
}

.page-faq .faq-help__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  padding: 9px 0;
  border-bottom: 1px solid rgba(247, 245, 239, 0.16);
}

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

.page-faq .faq-help__row dt {
  flex: 0 0 84px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(247, 245, 239, 0.55);
  line-height: 1.9;
}

.page-faq .faq-help__row dd {
  margin: 0;
  flex: 1 1 200px;
  min-width: 0;
  font-size: 15px;
  line-height: 1.7;
  color: #fff;
  word-break: break-word;
}

.page-faq .faq-help__prep-title {
  margin: 22px 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(247, 245, 239, 0.55);
}

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

.page-faq .faq-help__prep li {
  position: relative;
  padding: 0 0 8px 18px;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(247, 245, 239, 0.82);
}

.page-faq .faq-help__prep li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 1px;
  background: var(--signal);
}

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

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-help__actions .btn--primary {
  background: var(--green);
  border-color: var(--green);
  color: #fff;
}

.page-faq .faq-help__actions .btn--primary:hover {
  background: var(--jade);
  border-color: var(--jade);
}

.page-faq .faq-help__actions .btn--line {
  border-color: rgba(247, 245, 239, 0.42);
  color: var(--warm);
  background: transparent;
}

.page-faq .faq-help__actions .btn--line:hover {
  border-color: var(--warm);
  background: rgba(247, 245, 239, 0.08);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body__inner {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
  }

  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--topbar-h) + 22px);
  }

  .page-faq .faq-cat__head {
    padding-bottom: 16px;
  }

  .page-faq .faq-item__summary {
    padding: 19px 18px 19px 16px;
  }

  .page-faq .faq-item__panel {
    padding: 0 64px 22px 44px;
    max-width: 68ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-toc__link,
  .page-faq .faq-item,
  .page-faq .faq-item__summary,
  .page-faq .faq-item__summary::after,
  .page-faq .faq-item__num,
  .page-faq .faq-filter__input {
    transition: none;
  }
}