.page-faq {
  --faq-line: rgba(217, 226, 231, 0.14);
  --faq-line-soft: rgba(217, 226, 231, 0.07);
  background-color: var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
}

.page-faq .mono {
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4.5vw, 56px) 0 clamp(30px, 5vw, 64px);
  background:
    radial-gradient(120% 90% at 86% -10%, rgba(200, 162, 74, 0.18), transparent 62%),
    radial-gradient(90% 80% at 0% 110%, rgba(95, 143, 122, 0.16), transparent 58%),
    linear-gradient(162deg, var(--ink-3), var(--ink) 62%);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, var(--faq-line-soft) 1px, transparent 1px);
  background-size: 104px 100%;
  pointer-events: none;
}

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

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-size: clamp(1.75rem, 4.6vw, 2.9rem);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: 0.03em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 36em;
  font-size: 0.98rem;
  line-height: 1.85;
  color: rgba(243, 238, 228, 0.8);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: clamp(24px, 4vw, 38px);
}

.page-faq .faq-hero__media {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--faq-line);
  background: var(--ink-2);
}

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

.page-faq .faq-hero__media .media__caption {
  display: block;
  padding: 10px 14px;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: rgba(243, 238, 228, 0.6);
  border-top: 1px solid var(--faq-line-soft);
}

/* ---------- 快速诊断路线 ---------- */
.page-faq .quick-route {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 18px;
  border: 1px solid var(--line-gold);
  background: linear-gradient(180deg, rgba(18, 42, 68, 0.94), rgba(11, 27, 43, 0.94));
}

.page-faq .quick-route__title {
  margin: 0;
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--gold-lift);
}

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

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

.page-faq .quick-route__list li + li {
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .quick-route__list a {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  padding: 8px 4px;
  font-size: 0.9rem;
  color: rgba(243, 238, 228, 0.86);
  text-decoration: none;
  transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
}

.page-faq .quick-route__list a .mono {
  flex: 0 0 auto;
  font-size: 0.72rem;
  color: var(--gold);
}

.page-faq .quick-route__list a:hover,
.page-faq .quick-route__list a:focus-visible {
  color: var(--gold-lift);
  padding-left: 10px;
}

/* ---------- 问答主体 ---------- */
.page-faq .faq-board__head {
  margin-top: clamp(30px, 5vw, 56px);
}

.page-faq .faq-board {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  margin-top: 22px;
  padding-bottom: clamp(34px, 6vw, 72px);
}

.page-faq .faq-board__rail-label {
  margin: 22px 0 8px;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: rgba(243, 238, 228, 0.45);
}

/* 筛选条 */
.page-faq .filter-bar {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
}

.page-faq .filter-btn {
  flex: 0 0 auto;
  min-height: 44px;
  padding: 8px 16px;
  white-space: nowrap;
  font-family: inherit;
  font-size: 0.86rem;
  letter-spacing: 0.03em;
  color: rgba(243, 238, 228, 0.78);
  background: transparent;
  border: 1px solid var(--faq-line);
  border-radius: 0;
  cursor: pointer;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .filter-btn:hover {
  border-color: var(--line-gold);
  color: var(--gold-lift);
}

.page-faq .filter-btn[aria-pressed="true"] {
  color: var(--gold-lift);
  border-color: var(--gold);
  background: rgba(200, 162, 74, 0.12);
}

/* 索引 */
.page-faq .faq-index {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-index li {
  border-bottom: 1px solid var(--faq-line-soft);
}

.page-faq .faq-index a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-height: 42px;
  padding: 8px 2px;
  font-size: 0.82rem;
  line-height: 1.5;
  color: rgba(243, 238, 228, 0.66);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

.page-faq .faq-index a .mono {
  flex: 0 0 auto;
  font-size: 0.7rem;
  color: var(--gold);
}

.page-faq .faq-index a:hover,
.page-faq .faq-index a:focus-visible {
  color: var(--gold-lift);
}

/* 分组 */
.page-faq .faq-group {
  margin-bottom: clamp(26px, 4vw, 42px);
}

.page-faq .faq-group__title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 14px;
  font-size: 0.94rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--gold-lift);
}

.page-faq .faq-group__title .mono {
  font-size: 0.72rem;
  color: var(--terracotta);
}

.page-faq .faq-group__title::after {
  content: "";
  flex: 1 1 auto;
  height: 1px;
  background: var(--faq-line);
}

/* 折叠问答 */
.page-faq .faq-item {
  margin-bottom: 10px;
  background: rgba(18, 42, 68, 0.5);
  border: 1px solid var(--faq-line);
  border-left: 2px solid transparent;
  transition: background-color 0.22s var(--ease), border-left-color 0.22s var(--ease);
}

.page-faq .faq-item[open] {
  background: rgba(18, 42, 68, 0.88);
  border-left-color: var(--gold);
}

.page-faq .faq-item__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 8px 12px;
  min-height: 56px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .faq-item__num {
  flex: 0 0 auto;
  padding-top: 4px;
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-faq .faq-item__title {
  flex: 1 1 190px;
  font-size: 0.96rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
}

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 3px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: calc(50% - 1px);
  height: 1px;
  background: var(--gold-lift);
}

.page-faq .faq-item__mark::after {
  transition: transform 0.24s var(--ease);
  transform: rotate(90deg);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: rotate(0deg);
}

.page-faq .faq-item__body {
  padding: 0 16px 18px;
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .faq-item__body p {
  margin: 14px 0 0;
  max-width: 40em;
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(243, 238, 228, 0.8);
}

.page-faq .faq-item__body p.faq-item__path {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--faq-line-soft);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  color: rgba(217, 226, 231, 0.62);
}

.page-faq .faq-item__body a {
  color: var(--gold-lift);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item__body a:hover {
  color: var(--amber);
}

.page-faq .faq-figure {
  margin: 0 0 16px;
  overflow: hidden;
  border: 1px solid var(--faq-line);
  background: var(--ink-2);
}

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

.page-faq .faq-figure .media__caption {
  display: block;
  padding: 10px 14px;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: rgba(243, 238, 228, 0.6);
  border-top: 1px solid var(--faq-line-soft);
}

/* ---------- 联系准备 ---------- */
.page-faq .faq-prepare {
  padding-block: clamp(36px, 6vw, 72px);
  background: var(--paper);
  color: var(--ink);
  border-top: 2px solid var(--gold);
}

.page-faq .faq-prepare__inner .eyebrow {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--terracotta);
}

.page-faq .faq-prepare__title {
  margin: 10px 0 0;
  font-size: clamp(1.35rem, 3.2vw, 1.9rem);
  font-weight: 800;
  letter-spacing: 0.03em;
  color: var(--ink);
}

.page-faq .faq-prepare__lead {
  margin: 14px 0 0;
  max-width: 34em;
  font-size: 0.94rem;
  line-height: 1.8;
  color: rgba(11, 27, 43, 0.74);
}

.page-faq .faq-prepare__list {
  display: grid;
  gap: 1px;
  margin: 22px 0 0;
  padding: 1px;
  list-style: none;
  background: rgba(11, 27, 43, 0.14);
}

.page-faq .faq-prepare__list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 16px;
  font-size: 0.92rem;
  line-height: 1.7;
  background: var(--paper);
}

.page-faq .faq-prepare__list .mono {
  flex: 0 0 auto;
  padding-top: 3px;
  font-size: 0.74rem;
  color: var(--terracotta);
}

.page-faq .faq-prepare__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-prepare__actions a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  border: 1px solid var(--ink);
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-prepare__actions a:first-child {
  background: var(--ink);
  color: var(--paper);
}

.page-faq .faq-prepare__actions a:first-child:hover {
  background: var(--terracotta);
  border-color: var(--terracotta);
}

.page-faq .faq-prepare__actions a + a {
  background: transparent;
  color: var(--ink);
}

.page-faq .faq-prepare__actions a + a:hover {
  background: rgba(11, 27, 43, 0.08);
}

.page-faq .faq-prepare__note {
  margin: 20px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--gold);
  font-size: 0.84rem;
  line-height: 1.75;
  color: rgba(11, 27, 43, 0.68);
}

.page-faq .faq-prepare__note a {
  color: var(--terracotta);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: stretch;
    gap: 22px;
  }

  .page-faq .faq-hero__media img {
    height: 100%;
    aspect-ratio: auto;
  }

  .page-faq .filter-bar {
    flex-wrap: wrap;
    overflow-x: visible;
    padding-bottom: 0;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-board {
    grid-template-columns: 258px minmax(0, 1fr);
    gap: 48px;
  }

  .page-faq .faq-board__rail {
    position: sticky;
    top: 88px;
    align-self: start;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    padding-right: 6px;
  }

  .page-faq .filter-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .page-faq .filter-btn {
    text-align: left;
    padding-inline: 14px;
  }

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

  .page-faq .faq-item__head {
    padding: 17px 20px;
  }

  .page-faq .faq-item__body {
    padding: 0 20px 20px;
  }

  .page-faq .faq-figure {
    margin-bottom: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__mark::after,
  .page-faq .filter-btn,
  .page-faq .faq-index a,
  .page-faq .quick-route__list a,
  .page-faq .faq-prepare__actions a {
    transition: none;
  }
}