.page-faq,
.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq {
  background: var(--ink-900);
  color: var(--mist-200);
  font-family: var(--font-sans);
  padding: 0 0 72px;
  overflow-x: hidden;
}

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

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  padding-top: 26px;
}

.page-faq .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--steel-500);
}

.page-faq .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 10px;
  color: var(--steel-500);
}

.page-faq .breadcrumb-list a {
  color: var(--mist-200);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-faq .breadcrumb-list a:hover {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

/* ---------- 页首 ---------- */
.page-faq .faq-head {
  display: grid;
  gap: 18px;
  max-width: 62rem;
  padding: 40px 0 4px;
}

.page-faq .faq-kicker {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--neon);
  font-family: var(--font-mono);
}

.page-faq .faq-title {
  margin: 0;
  font-size: clamp(28px, 7.2vw, 58px);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--cold-white);
}

.page-faq .faq-lede {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist-200);
  max-width: 40em;
}

/* ---------- 首屏图 ---------- */
.page-faq .faq-hero {
  margin: 30px 0 0;
}

.page-faq .faq-hero img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  border: 1px solid var(--hair);
  border-radius: var(--radius-m);
  background: var(--ink-800);
}

.page-faq .faq-hero figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--steel-500);
}

/* ---------- 统计条 ---------- */
.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 38px 0 0;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-faq .faq-stats .stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 14px;
  background: var(--ink-800);
}

.page-faq .stat-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 26px;
  line-height: 1;
  color: var(--cold-white);
}

.page-faq .stat-label {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--steel-500);
}

/* ---------- 分类胶囊 ---------- */
.page-faq .faq-index-nav {
  margin-top: 34px;
}

.page-faq .faq-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  font-size: 13px;
  color: var(--mist-200);
  text-decoration: none;
  border: 1px solid var(--hair-strong);
  border-radius: var(--radius-pill);
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease), background-color var(--t) var(--ease);
}

.page-faq .faq-pill:hover {
  color: var(--cold-white);
  border-color: var(--neon);
  background: var(--violet);
}

.page-faq .faq-pill:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
}

.page-faq .faq-pill-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--neon);
}

.page-faq .faq-pill-count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--steel-500);
}

.page-faq .faq-pill-count::before {
  content: "/ ";
}

/* ---------- 两栏骨架 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  margin-top: 54px;
}

.page-faq .faq-rail {
  min-width: 0;
  border-top: 1px solid var(--hair-strong);
  padding-top: 18px;
}

.page-faq .rail-title {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--steel-500);
  font-family: var(--font-mono);
}

.page-faq .rail-nav {
  display: flex;
  flex-direction: row;
  gap: 8px;
  overflow-x: auto;
  padding: 2px 2px 10px;
}

.page-faq .rail-link {
  display: grid;
  grid-template-columns: auto auto auto;
  align-items: baseline;
  gap: 10px;
  flex: 0 0 auto;
  padding: 9px 12px;
  font-size: 13px;
  color: var(--mist-200);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color var(--t) var(--ease), background-color var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-faq .rail-link:hover {
  color: var(--cold-white);
  background: var(--ink-800);
}

.page-faq .rail-link:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-faq .rail-link.is-active {
  color: var(--cold-white);
  border-bottom-color: var(--neon);
  background: var(--violet);
}

.page-faq .rail-step {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--neon);
}

.page-faq .rail-count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--steel-500);
}

.page-faq .rail-meta {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--hair);
}

.page-faq .rail-meta p {
  margin: 0 0 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--steel-500);
}

/* ---------- 章节 ---------- */
.page-faq .faq-content {
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 28px);
  margin-top: 56px;
}

.page-faq .faq-group:first-child {
  margin-top: 0;
}

.page-faq .section-head {
  display: grid;
  gap: 8px;
  padding-top: 16px;
  margin-bottom: 22px;
  border-top: 1px solid var(--hair-strong);
}

.page-faq .section-index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--neon);
}

.page-faq .section-title {
  margin: 0;
  font-size: clamp(21px, 4.6vw, 30px);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--cold-white);
}

.page-faq .section-note {
  margin: 0;
  max-width: 40em;
  font-size: 13px;
  line-height: 1.65;
  color: var(--steel-500);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid var(--hair);
}

.page-faq .faq-item {
  border-top: 1px solid var(--hair);
}

.page-faq .faq-q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px;
  align-items: baseline;
  padding: 16px 14px;
  list-style: none;
  cursor: pointer;
  font-size: 15px;
  line-height: 1.55;
  color: var(--cold-white);
  border-left: 2px solid transparent;
  transition: background-color var(--t) var(--ease), border-color var(--t) var(--ease), color var(--t) var(--ease);
}

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

.page-faq .faq-q:hover {
  background: var(--ink-800);
}

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

.page-faq .faq-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel-500);
  transition: color var(--t) var(--ease);
}

.page-faq .faq-q::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1;
  color: var(--steel-500);
}

.page-faq .faq-item[open] .faq-q {
  background: var(--ink-800);
  border-left-color: var(--neon);
}

.page-faq .faq-item[open] .faq-num,
.page-faq .faq-item[open] .faq-q::after {
  color: var(--neon);
}

.page-faq .faq-item[open] .faq-q::after {
  content: "\2212";
}

.page-faq .faq-a {
  display: grid;
  gap: 10px;
  padding: 4px 14px 22px 14px;
  background: var(--ink-800);
  border-left: 2px solid var(--neon);
}

.page-faq .faq-lead {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  font-weight: 500;
  color: var(--cold-white);
  max-width: 38em;
}

.page-faq .faq-note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist-200);
  max-width: 40em;
}

.page-faq .faq-note a {
  color: var(--cold-white);
  text-decoration: underline;
  text-decoration-color: var(--steel-500);
  text-underline-offset: 3px;
  transition: color var(--t) var(--ease), text-decoration-color var(--t) var(--ease);
}

.page-faq .faq-note a:hover {
  color: var(--neon);
  text-decoration-color: var(--neon);
}

/* ---------- 口径组信息图 ---------- */
.page-faq .faq-figure {
  display: grid;
  gap: 18px;
  margin: 0 0 26px;
}

.page-faq .faq-figure-media {
  margin: 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--hair);
  border-radius: var(--radius-m);
  background: var(--ink-800);
}

.page-faq .faq-figure-text p {
  margin: 0 0 10px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist-200);
}

.page-faq .faq-figure-title {
  font-size: 14px !important;
  font-weight: 600;
  color: var(--cold-white) !important;
}

/* ---------- 收口 ---------- */
.page-faq .faq-handoff-grid {
  display: grid;
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-faq .faq-handoff-card {
  padding: 20px 18px;
  background: var(--ink-800);
}

.page-faq .faq-handoff-card h3 {
  margin: 0 0 14px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--cold-white);
}

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

.page-faq .faq-checklist li {
  position: relative;
  padding-left: 20px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--mist-200);
}

.page-faq .faq-checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 9px;
  height: 1px;
  background: var(--neon);
}

.page-faq .faq-handoff-note {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--hair);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--steel-500);
}

.page-faq .faq-mail-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--steel-500);
}

.page-faq .faq-mail {
  margin: 10px 0 14px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.5;
  color: var(--cold-white);
  word-break: break-all;
}

.page-faq .copy-btn {
  display: inline-flex;
  align-items: center;
  padding: 9px 16px;
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--cold-white);
  background: transparent;
  border: 1px solid var(--hair-strong);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease), background-color var(--t) var(--ease);
}

.page-faq .copy-btn:hover {
  color: var(--neon);
  border-color: var(--neon);
  background: var(--violet);
}

.page-faq .copy-btn:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
}

.page-faq .copy-btn[data-copied] {
  color: var(--ink-900);
  background: var(--neon);
  border-color: var(--neon);
}

.page-faq .faq-mail-note {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--steel-500);
}

.page-faq .faq-actions {
  margin: 22px 0 0;
}

.page-faq .btn {
  display: inline-flex;
  align-items: center;
  padding: 12px 22px;
  font-size: 13px;
  text-decoration: none;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  transition: background-color var(--t) var(--ease), color var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-faq .btn-primary {
  color: var(--ink-900);
  background: var(--neon);
  border-color: var(--neon);
}

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

.page-faq .btn-primary:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
}

.page-faq .faq-links {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--steel-500);
  max-width: 46em;
}

.page-faq .faq-links a {
  color: var(--mist-200);
  text-decoration: underline;
  text-decoration-color: var(--steel-500);
  text-underline-offset: 3px;
  transition: color var(--t) var(--ease), text-decoration-color var(--t) var(--ease);
}

.page-faq .faq-links a:hover {
  color: var(--neon);
  text-decoration-color: var(--neon);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-stats .stat {
    padding: 18px 16px;
  }

  .page-faq .faq-q {
    padding: 18px 20px;
  }

  .page-faq .faq-a {
    padding: 6px 20px 24px 52px;
  }

  .page-faq .faq-figure {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
    gap: 28px;
  }

  .page-faq .faq-handoff-card {
    padding: 24px 22px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-handoff-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-split {
    grid-template-columns: var(--rail-w) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-faq .rail-nav {
    flex-direction: column;
    gap: 2px;
    overflow-x: visible;
    padding: 0;
    border-left: 1px solid var(--hair);
  }

  .page-faq .rail-link {
    grid-template-columns: auto minmax(0, 1fr) auto;
    padding: 10px 12px;
    border-bottom: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
    white-space: normal;
  }

  .page-faq .rail-link.is-active {
    border-bottom-color: transparent;
    border-left-color: var(--neon);
  }

  .page-faq .faq-group {
    margin-top: 72px;
  }

  .page-faq .faq-group:first-child {
    margin-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-pill,
  .page-faq .rail-link,
  .page-faq .faq-q,
  .page-faq .copy-btn,
  .page-faq .btn {
    transition: none;
  }
}