/* ===== 支持中心 / page-faq ===== */

.page-faq {
  --faq-gap: clamp(16px, 3vw, 32px);
  --faq-pad: clamp(40px, 6vw, 88px);
}

.page-faq .crumbs {
  padding-block: 18px 6px;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding: clamp(20px, 3.4vw, 48px) 0 var(--faq-pad);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
}

.page-faq .faq-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(38px, 7.6vw, 96px);
  font-weight: 800;
  line-height: 1.03;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-faq .faq-hero__title em {
  font-style: normal;
  background-image: linear-gradient(var(--spot), var(--spot));
  background-repeat: no-repeat;
  background-size: 100% .15em;
  background-position: 0 88%;
}

.page-faq .faq-hero__lede {
  max-width: 48ch;
  margin: 22px 0 0;
  font-size: clamp(16px, 1.35vw, 19px);
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .faq-hero__legend {
  margin-top: 20px;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 14px 0 0;
}

.page-faq .faq-hero__media {
  aspect-ratio: 4 / 3;
}

.page-faq .media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@media (min-width: 940px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(28px, 4vw, 56px);
  }

  .page-faq .faq-hero__media {
    aspect-ratio: 7 / 4;
  }
}

/* ---------- 速查 + 问答 双栏 ---------- */

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 44px);
  padding-bottom: var(--faq-pad);
}

.page-faq .quick {
  border: var(--border-2);
  background: var(--paper);
  box-shadow: var(--shadow-2);
}

.page-faq .quick__head {
  padding: 16px 18px 14px;
  border-bottom: var(--border-2);
  background: var(--night);
  color: var(--paper-on-night);
}

.page-faq .quick__head .eyebrow {
  color: var(--muted-on-night);
}

.page-faq .quick__title {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 1.6vw, 22px);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--paper-on-night);
}

.page-faq .quick__scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .quick-table {
  width: 100%;
  min-width: 336px;
  border-collapse: collapse;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink);
}

.page-faq .quick-table th,
.page-faq .quick-table td {
  padding: 10px 9px;
  text-align: left;
  vertical-align: top;
  border-bottom: 2px solid var(--ink);
}

.page-faq .quick-table thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  background: var(--ink);
  color: var(--paper);
  white-space: nowrap;
}

.page-faq .quick-table thead th.qt-reg {
  background: var(--reg);
  color: var(--paper);
}

.page-faq .quick-table thead th.qt-app {
  background: var(--app);
  color: var(--paper);
}

.page-faq .quick-table tbody th {
  width: 30%;
  font-size: 12px;
  font-weight: 700;
  background: var(--ash);
}

.page-faq .quick-table tbody tr:nth-child(even) td {
  background: var(--turf);
}

.page-faq .quick-table tbody tr:last-child th,
.page-faq .quick-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-faq .quick__foot {
  margin: 0;
  padding: 12px 18px 16px;
  border-top: 2px solid var(--ink);
  font-size: 13px;
  line-height: 1.6;
  color: var(--noise);
}

/* ---------- 问答列表 ---------- */

.page-faq .faq-qa .section-head {
  margin-bottom: 22px;
}

.page-faq .qa-group + .qa-group {
  margin-top: clamp(28px, 3.6vw, 44px);
}

.page-faq .qa-group__title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: var(--border-2);
  font-family: var(--font-display);
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-faq .qa-group__idx {
  flex: none;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
}

.page-faq .qa {
  margin-bottom: 12px;
  border: var(--border-1);
  background: var(--paper);
  box-shadow: var(--shadow-1);
}

.page-faq .qa[open] {
  box-shadow: var(--shadow-2);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
}

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

.page-faq .qa__q::before {
  content: "+";
  flex: none;
  width: 18px;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.25;
  color: var(--spot);
}

.page-faq .qa[open] .qa__q::before {
  content: "–";
}

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

.page-faq .qa__a {
  padding: 0 16px 16px 46px;
}

.page-faq .qa__a p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .qa__a p + p {
  margin-top: 8px;
}

.page-faq .qa__a .tag {
  vertical-align: baseline;
}

@media (min-width: 1080px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1.62fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-layout__qa {
    grid-column: 1;
    grid-row: 1;
    min-width: 0;
  }

  .page-faq .faq-layout__quick {
    grid-column: 2;
    grid-row: 1;
    position: sticky;
    top: 116px;
  }
}

/* ---------- 纠错流程 ---------- */

.page-faq .faq-fix {
  padding: var(--faq-pad) 0;
  border-top: var(--border-2);
  border-bottom: var(--border-2);
  background: var(--night);
  color: var(--paper-on-night);
}

.page-faq .faq-fix .section-head__title {
  color: var(--paper-on-night);
}

.page-faq .faq-fix .section-head__note,
.page-faq .faq-fix .eyebrow {
  color: var(--muted-on-night);
}

.page-faq .faq-fix__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 52px);
}

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

.page-faq .faq-fix .ledger__body {
  color: var(--paper-on-night);
  line-height: 1.8;
}

.page-faq .faq-fix .ledger li::before {
  color: var(--spot);
  font-family: var(--font-mono);
}

.page-faq .faq-fix__note {
  margin: 22px 0 0;
  padding-left: 14px;
  border-left: 4px solid var(--reg);
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted-on-night);
}

.page-faq .faq-fix__note a {
  color: var(--paper-on-night);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

@media (min-width: 900px) {
  .page-faq .faq-fix__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 术语表 ---------- */

.page-faq .faq-terms {
  padding: var(--faq-pad) 0 0;
}

.page-faq .terms {
  margin: 26px 0 0;
  border-top: var(--border-2);
}

.page-faq .terms__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 16px 10px;
  border-bottom: 2px solid var(--ash);
  transition: background-color .2s var(--ease), box-shadow .2s var(--ease);
}

.page-faq .terms__term {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-faq .terms__def {
  margin: 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--noise);
}

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

@media (hover: hover) {
  .page-faq .terms__item:hover {
    background: var(--turf);
    box-shadow: inset 5px 0 0 var(--reg);
  }
}

.page-faq .terms__item:focus-within,
.page-faq .terms__item:focus {
  background: var(--turf);
  box-shadow: inset 5px 0 0 var(--app);
}

@media (min-width: 760px) {
  .page-faq .terms__item {
    grid-template-columns: minmax(140px, 220px) minmax(0, 1fr);
    align-items: baseline;
    gap: 28px;
    padding: 18px 14px;
  }
}

/* ---------- 延伸入口 ---------- */

.page-faq .faq-next {
  padding: clamp(36px, 5vw, 64px) 0 var(--faq-pad);
}

.page-faq .faq-next__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-faq .faq-next__list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-next__list .chip {
  display: inline-block;
  text-decoration: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .terms__item {
    transition: none;
  }
}