.page-faq {
  --faq-card-bg: var(--paper);
  --faq-card-ink: var(--on-paper);
  --faq-card-dim: var(--on-paper-dim);
  --faq-accent: var(--brand-700);
  --faq-accent-strong: var(--brand-500);
  --faq-index-w: 236px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-block: clamp(28px, 5vw, 64px) clamp(22px, 3.5vw, 44px);
  isolation: isolate;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -160px;
  right: -120px;
  width: min(520px, 78vw);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at center, rgba(255, 90, 31, 0.18), rgba(255, 90, 31, 0) 66%);
  pointer-events: none;
  z-index: -1;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: calc(var(--pad-x) * -1);
  bottom: 0;
  width: 46%;
  max-width: 380px;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-500), rgba(255, 90, 31, 0));
  border-radius: 2px;
}

.page-faq .faq-hero__title {
  margin: 10px 0 14px;
  font-size: clamp(30px, 5.2vw, 58px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--snow);
}

.page-faq .faq-hero__lead {
  max-width: 62ch;
  margin: 0;
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1.8;
}

/* ---------- 主体网格 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  padding-bottom: clamp(44px, 7vw, 88px);
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 左侧分类索引 ---------- */
.page-faq .faq-index {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

@media (min-width: 980px) {
  .page-faq .faq-index {
    position: sticky;
    top: 104px;
  }
}

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

.page-faq .faq-index .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

@media (min-width: 980px) {
  .page-faq .faq-index .filter-bar {
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: stretch;
    gap: 2px;
  }
}

.page-faq .faq-index .filter-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  width: auto;
  padding: 9px 12px;
  border: 0;
  border-left: 2px solid var(--line-700);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  background: transparent;
  color: var(--text-dim);
  font: inherit;
  font-size: 14px;
  line-height: 1.4;
  text-align: left;
  cursor: pointer;
  transition: background var(--dur-2) var(--ease), color var(--dur-2) var(--ease),
    border-color var(--dur-2) var(--ease);
}

@media (min-width: 980px) {
  .page-faq .faq-index .filter-chip {
    width: 100%;
    padding: 10px 12px;
  }
}

.page-faq .faq-index .filter-chip:hover {
  color: var(--snow);
  background: rgba(36, 64, 107, 0.42);
}

.page-faq .faq-index .filter-chip[aria-pressed="true"] {
  border-left-color: var(--brand-500);
  background: linear-gradient(90deg, rgba(255, 90, 31, 0.18), rgba(255, 90, 31, 0) 82%);
  color: var(--snow);
}

.page-faq .faq-chip__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--mist);
  transition: color var(--dur-2) var(--ease);
}

.page-faq .faq-index .filter-chip[aria-pressed="true"] .faq-chip__num {
  color: var(--brand-400);
}

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

.page-faq .faq-index__note {
  margin: 4px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-mute);
}

/* ---------- 分类分组 ---------- */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-group {
  margin-bottom: clamp(38px, 6vw, 70px);
  scroll-margin-top: 110px;
}

.page-faq .faq-group:last-of-type {
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-faq .faq-group__head {
  border-top: 1px solid var(--line-700);
  padding-top: 16px;
  margin-bottom: 18px;
}

.page-faq .faq-group__head h2 {
  margin: 8px 0 10px;
  font-size: clamp(23px, 3.2vw, 33px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--snow);
}

.page-faq .faq-group__lead {
  max-width: 58ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-dim);
}

/* ---------- 插图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 22px;
}

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

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-m);
  border: var(--frame);
}

.page-faq .faq-figure .media__caption {
  margin-top: 8px;
  font-size: 12px;
  color: var(--text-mute);
}

/* ---------- 面板与记录：图文分栏 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

@media (min-width: 1180px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    gap: 26px;
    align-items: start;
  }
}

/* ---------- 问答项 ---------- */
.page-faq .accordion {
  display: block;
}

.page-faq .accordion__item {
  background: var(--faq-card-bg);
  border: 1px solid var(--line-700);
  border-radius: var(--radius-s);
  margin-bottom: 10px;
  overflow: hidden;
  transition: box-shadow var(--dur-3) var(--ease);
}

.page-faq .accordion__item:has(.accordion__trigger[aria-expanded="true"]) {
  box-shadow: 0 20px 36px -28px rgba(0, 0, 0, 0.95);
}

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

.page-faq .faq-q {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .accordion__trigger {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  padding: 15px 16px;
  background: none;
  border: 0;
  color: var(--faq-card-ink);
  font: inherit;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
  transition: color var(--dur-2) var(--ease);
}

.page-faq .accordion__trigger:hover {
  color: var(--faq-accent);
}

.page-faq .faq-mark {
  flex: 0 0 auto;
  width: 4px;
  align-self: stretch;
  min-height: 22px;
  border-radius: 2px;
  background: rgba(11, 27, 51, 0.22);
  transition: background var(--dur-2) var(--ease);
}

.page-faq .accordion__trigger[aria-expanded="true"] .faq-mark {
  background: var(--faq-accent-strong);
}

.page-faq .faq-num {
  flex: 0 0 auto;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--faq-accent);
}

.page-faq .faq-qtext {
  min-width: 0;
  overflow-wrap: break-word;
}

.page-faq .accordion__content {
  padding: 0 16px 16px 52px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--faq-card-dim);
}

.page-faq .accordion__content p {
  margin: 0 0 10px;
}

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

.page-faq .faq-more {
  font-size: 14px;
}

.page-faq .faq-more a {
  color: var(--faq-accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(199, 54, 15, 0.42);
  transition: color var(--dur-2) var(--ease), border-color var(--dur-2) var(--ease);
}

.page-faq .faq-more a:hover {
  color: var(--brand-500);
  border-bottom-color: var(--brand-500);
}

/* ---------- 底部联系窄带 ---------- */
.page-faq .faq-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  padding: clamp(20px, 3.4vw, 32px);
  border: var(--frame);
  border-radius: var(--radius-m);
  background:
    linear-gradient(118deg, rgba(255, 90, 31, 0.16), rgba(255, 90, 31, 0) 56%),
    var(--ink-800);
}

@media (min-width: 760px) {
  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 26px;
  }
}

.page-faq .faq-cta__text h2 {
  margin: 6px 0 8px;
  font-size: clamp(20px, 2.6vw, 27px);
  font-weight: 800;
  line-height: 1.2;
  color: var(--snow);
}

.page-faq .faq-cta__text p {
  margin: 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-faq .faq-cta .btn {
  justify-self: start;
  white-space: nowrap;
}

/* ---------- 筛选隐藏 ---------- */
.page-faq [data-filter-item][hidden] {
  display: none;
}

/* ---------- 窄屏收尾 ---------- */
@media (max-width: 639px) {
  .page-faq .accordion__trigger {
    padding: 13px 13px;
    font-size: 15px;
    gap: 10px;
  }

  .page-faq .accordion__content {
    padding: 0 13px 14px 39px;
    font-size: 14.5px;
  }

  .page-faq .faq-hero::after {
    width: 62%;
  }
}