.page-faq {
  --faq-rail-w: 248px;
  --faq-ink: var(--ink-900);
  background: var(--ink-900);
  color: var(--off-white-100);
}

.page-faq .container {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 18px 0 clamp(36px, 7vw, 76px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -28%;
  right: -14%;
  width: min(760px, 96%);
  height: 78%;
  background:
    linear-gradient(118deg, rgba(200, 255, 61, 0.16), rgba(200, 255, 61, 0) 58%),
    repeating-linear-gradient(90deg, rgba(143, 166, 184, 0.12) 0 1px, transparent 1px 68px);
  transform: rotate(-5deg);
  pointer-events: none;
}

.page-faq .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0 0 clamp(20px, 4vw, 34px);
  padding: 0;
  font-size: 13px;
  color: var(--gray-blue-400);
}

.page-faq .breadcrumb-list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--rock-500);
}

.page-faq .breadcrumb-list a {
  color: var(--muted-300);
  text-decoration: none;
}

.page-faq .breadcrumb-list a:hover {
  color: var(--lime-400);
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(26px, 5vw, 48px);
}

.page-faq .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lime-400);
}

.page-faq .display-title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.6vw, 4.1rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--off-white-100);
}

.page-faq .lede {
  margin: 18px 0 0;
  max-width: 48ch;
  font-size: clamp(15px, 2.6vw, 17px);
  line-height: 1.75;
  color: var(--muted-300);
}

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

.page-faq .faq-quick a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-pill);
  font-size: 14px;
  color: var(--off-white-100);
  text-decoration: none;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease);
}

.page-faq .faq-quick a:hover,
.page-faq .faq-quick a:focus-visible {
  border-color: var(--lime-400);
  background: rgba(200, 255, 61, 0.1);
}

.page-faq .faq-quick .mono {
  font-size: 12px;
  color: var(--lime-400);
}

.page-faq .faq-hero__figure {
  margin: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--ink-800);
}

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

.page-faq .media-frame__caption {
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--gray-blue-400);
  background: var(--ink-800);
}

/* ---------- 问答区 ---------- */
.page-faq .faq-body {
  padding: clamp(34px, 6vw, 76px) 0;
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

.page-faq .faq-rail {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--ink-800);
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray-blue-400);
}

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

.page-faq .faq-rail__list li {
  flex: 0 0 auto;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  font-size: 14px;
  white-space: nowrap;
  color: var(--muted-300);
  text-decoration: none;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-rail__link:hover {
  border-color: var(--line-strong);
  color: var(--off-white-100);
}

.page-faq .faq-rail__link .mono {
  font-size: 11px;
  color: var(--gray-blue-400);
}

.page-faq .faq-rail__count {
  padding: 2px 7px;
  border-radius: var(--r-pill);
  background: rgba(143, 166, 184, 0.14);
  font-size: 11px;
  color: var(--gray-blue-400);
}

.page-faq .faq-rail__link[aria-current="true"] {
  background: var(--lime-400);
  border-color: var(--lime-400);
  color: var(--faq-ink);
}

.page-faq .faq-rail__link[aria-current="true"] .mono,
.page-faq .faq-rail__link[aria-current="true"] .faq-rail__count {
  color: var(--faq-ink);
}

.page-faq .faq-rail__link[aria-current="true"] .faq-rail__count {
  background: rgba(7, 19, 15, 0.14);
}

.page-faq .faq-rail__note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--gray-blue-400);
}

.page-faq .faq-rail__note a {
  color: var(--lime-400);
  text-decoration: none;
}

.page-faq .faq-rail__note a:hover {
  text-decoration: underline;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(38px, 6vw, 66px);
  padding-top: clamp(30px, 5vw, 52px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-group__head {
  margin-bottom: clamp(18px, 3vw, 26px);
}

.page-faq .section-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.42rem, 3.6vw, 2.05rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--off-white-100);
}

.page-faq .faq-group__intro {
  margin: 12px 0 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted-300);
}

/* 路径示意 */
.page-faq .faq-path {
  margin: 0 0 clamp(20px, 3vw, 28px);
  padding: 16px 18px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background:
    linear-gradient(120deg, rgba(200, 255, 61, 0.07), rgba(200, 255, 61, 0) 62%),
    var(--ink-800);
}

.page-faq .faq-path__svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .faq-path__steps {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 10px;
  font-size: 13px;
  color: var(--muted-300);
}

.page-faq .faq-path__steps .mono {
  margin-right: 6px;
  font-size: 11px;
  color: var(--lime-400);
}

.page-faq .faq-sub-figure {
  margin: 0 0 clamp(22px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--ink-800);
}

/* 折叠问答 */
.page-faq .accordion-item {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--ink-800);
  overflow: hidden;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .accordion-item + .accordion-item {
  margin-top: 10px;
}

.page-faq .accordion-item.is-open {
  border-color: var(--lime-line);
  background: var(--moss-700);
}

.page-faq .accordion-trigger {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  padding: 16px 16px;
  border: 0;
  background: none;
  font: inherit;
  text-align: left;
  color: var(--off-white-100);
  cursor: pointer;
}

.page-faq .accordion-index {
  flex: none;
  padding-top: 3px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gray-blue-400);
  transition: color 0.2s var(--ease);
}

.page-faq .accordion-item.is-open .accordion-index {
  color: var(--lime-400);
}

.page-faq .faq-q {
  flex: 1 1 auto;
  font-size: clamp(15px, 2.7vw, 17px);
  font-weight: 600;
  line-height: 1.5;
}

.page-faq .accordion-icon {
  flex: none;
  margin-top: 4px;
  color: var(--gray-blue-400);
}

.page-faq .faq-answer {
  padding: 0 16px 18px;
}

.page-faq .faq-answer__verdict {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 12px;
  padding: 11px 14px;
  border-left: 3px solid var(--lime-400);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: rgba(200, 255, 61, 0.08);
  font-size: 15px;
  line-height: 1.65;
  color: var(--off-white-100);
}

.page-faq .faq-answer__verdict .mono {
  flex: none;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--lime-400);
}

.page-faq .faq-answer p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted-300);
}

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

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

.page-faq .faq-answer a:hover {
  color: var(--lime-200);
}

/* ---------- 人工支持（浅色区） ---------- */
.page-faq .faq-help {
  background: var(--off-white-100);
  color: var(--faq-ink);
  padding: clamp(38px, 7vw, 82px) 0;
}

.page-faq .faq-help .eyebrow {
  color: #4A534C;
}

.page-faq .faq-help .section-title {
  color: var(--faq-ink);
}

.page-faq .faq-help__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-faq .faq-help__text {
  margin: 14px 0 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.78;
  color: #33413A;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .faq-help .btn--ghost {
  color: var(--faq-ink);
  border-color: rgba(7, 19, 15, 0.28);
}

.page-faq .faq-help .btn--ghost:hover {
  border-color: var(--faq-ink);
  background: rgba(7, 19, 15, 0.06);
}

.page-faq .faq-facts {
  margin: 0;
  padding: 4px 0;
  border-top: 1px solid rgba(7, 19, 15, 0.16);
}

.page-faq .faq-facts__row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(7, 19, 15, 0.16);
}

.page-faq .faq-facts dt {
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #5A7061;
}

.page-faq .faq-facts dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--faq-ink);
  overflow-wrap: anywhere;
}

.page-faq .faq-facts dd.mono {
  font-family: var(--font-mono);
  font-size: 14px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-facts__row {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: end;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-faq .accordion-trigger {
    padding: 18px 22px;
    gap: 16px;
  }

  .page-faq .faq-answer {
    padding: 0 22px 22px 50px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 88px;
    padding: 20px;
  }

  .page-faq .faq-rail__list {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-rail__list li + li {
    margin-top: 6px;
  }

  .page-faq .faq-rail__link {
    width: 100%;
    justify-content: flex-start;
    border-radius: var(--r-md);
    white-space: normal;
  }

  .page-faq .faq-rail__count {
    margin-left: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick a,
  .page-faq .faq-rail__link,
  .page-faq .accordion-item,
  .page-faq .accordion-index {
    transition: none;
  }
}