/* ===== 答疑中心 /answers/ ===== */
.page-faq {
  --faq-gold-line: rgba(201, 162, 39, .26);
  --faq-gold-strong: rgba(201, 162, 39, .55);
  --faq-umber-line: rgba(58, 46, 36, .95);
  --faq-text: #D8D3C7;
  position: relative;
  color: var(--paper);
  padding-bottom: 88px;
  background:
    radial-gradient(120% 70% at 10% 0%, rgba(31, 58, 52, .55) 0%, rgba(14, 16, 19, 0) 62%),
    radial-gradient(90% 55% at 100% 18%, rgba(58, 46, 36, .5) 0%, rgba(14, 16, 19, 0) 70%),
    var(--ink);
}

.page-faq .faq-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 44px var(--gutter) 0;
  box-sizing: border-box;
}

.page-faq .faq-shell * {
  box-sizing: border-box;
}

.page-faq .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--index);
}

.page-faq .crumbs a {
  color: var(--gold-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

.page-faq .crumbs a:hover,
.page-faq .crumbs a:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.page-faq .crumbs__sep {
  color: rgba(138, 133, 120, .7);
}

/* --- 页首 --- */
.page-faq .faq-head {
  position: relative;
  padding: 26px 0 44px;
  border-bottom: 1px solid var(--faq-gold-line);
}

.page-faq .faq-head .ref-no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--gold);
  border: 1px solid var(--faq-gold-strong);
  padding: 3px 10px;
  display: inline-block;
}

.page-faq .page-title {
  position: relative;
  margin: 22px 0 0;
  max-width: 24ch;
  font-size: clamp(29px, 5vw, 54px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-faq .page-title::before {
  content: "";
  display: block;
  width: 64px;
  height: 6px;
  margin-bottom: 20px;
  background: linear-gradient(90deg, var(--gold) 0%, var(--seal) 100%);
}

.page-faq .page-lede {
  margin: 22px 0 0;
  max-width: 66ch;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.85;
  color: var(--faq-text);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 34px;
}

.page-faq .faq-stat {
  position: relative;
  padding: 16px 16px 14px;
  border: 1px solid var(--faq-gold-line);
  border-radius: 2px;
  background: linear-gradient(158deg, rgba(23, 26, 32, .95) 0%, rgba(23, 26, 32, .55) 100%);
}

.page-faq .faq-stat::after {
  content: "";
  position: absolute;
  right: 10px;
  top: 10px;
  width: 12px;
  height: 1px;
  background: var(--faq-gold-strong);
}

.page-faq .faq-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.4vw, 30px);
  letter-spacing: .04em;
  color: var(--gold-soft);
  line-height: 1.1;
}

.page-faq .faq-stat__num small {
  font-size: .5em;
  margin-left: 2px;
  color: var(--gold);
}

.page-faq .faq-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--index);
}

/* --- 章节骨架 --- */
.page-faq .faq-section {
  padding: 58px 0 6px;
}

.page-faq .faq-section + .faq-section {
  margin-top: 26px;
  border-top: 1px dashed rgba(138, 133, 120, .3);
}

.page-faq .section-head {
  margin-bottom: 26px;
}

.page-faq .section-head__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--gold);
  margin-bottom: 10px;
}

.page-faq .section-head__title {
  margin: 0;
  font-size: clamp(22px, 3.1vw, 32px);
  font-weight: 900;
  line-height: 1.35;
  color: var(--paper);
  max-width: 26ch;
}

.page-faq .section-head__note {
  margin: 12px 0 0;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--index);
}

.page-faq .lead {
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.9;
  color: var(--faq-text);
  margin: 0 0 26px;
}

.page-faq a {
  color: var(--gold-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 206, 140, .4);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

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

/* --- 01 分组卡片 --- */
.page-faq .group-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-faq .group-card {
  border-radius: 2px;
  min-width: 0;
}

.page-faq .group-card .index-card__no {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--gold-ink);
}

.page-faq .group-card .index-card__title {
  font-size: 17px;
  font-weight: 800;
  line-height: 1.45;
  color: var(--ink);
}

.page-faq .group-card .index-card__body {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--body-mid);
}

.page-faq .group-card .index-card__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--gold-ink);
}

/* 编号解码块 */
.page-faq .faq-code {
  position: relative;
  margin-top: 26px;
  padding: 22px 20px 20px;
  border: 1px solid var(--faq-umber-line);
  border-left: 3px solid var(--gold);
  border-radius: 2px;
  background: linear-gradient(150deg, rgba(31, 58, 52, .42) 0%, rgba(23, 26, 32, .7) 100%);
}

.page-faq .faq-code__label {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--index);
}

.page-faq .faq-code__sample {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: clamp(20px, 4vw, 28px);
  letter-spacing: .06em;
}

.page-faq .faq-code__sample span:not(.faq-code__sep) {
  display: inline-block;
  padding: 4px 12px;
  color: var(--ink);
  background: linear-gradient(180deg, var(--gold-soft) 0%, var(--gold) 100%);
  border-radius: 2px;
}

.page-faq .faq-code__sep {
  color: var(--index);
}

.page-faq .faq-code__legend {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: 0;
}

.page-faq .faq-code__legend > div {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-faq .faq-code__legend dt {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--gold-soft);
  border: 1px solid var(--faq-gold-line);
  padding: 2px 8px;
  border-radius: 2px;
}

.page-faq .faq-code__legend dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--faq-text);
}

.page-faq .faq-code__tip {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--index);
  padding-left: 14px;
  border-left: 2px solid var(--seal);
}

/* --- 02 双栏对照 --- */
.page-faq .faq-figure {
  margin: 0 0 26px;
  border-radius: 2px;
}

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

.page-faq .faq-figure .media-frame__cap {
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--index);
}

.page-faq .diff-panel {
  position: relative;
  padding: 18px 16px 16px;
  border: 1px solid var(--faq-umber-line);
  border-radius: 2px;
  background: linear-gradient(180deg, rgba(23, 26, 32, .8) 0%, rgba(14, 16, 19, .6) 100%);
}

.page-faq .diff-panel__box {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-faq .diff-panel__label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  font-size: 13.5px;
  letter-spacing: .04em;
  color: var(--gold-soft);
  border: 1px solid var(--faq-gold-strong);
  border-radius: 2px;
  cursor: pointer;
  user-select: none;
  transition: background .18s var(--ease), color .18s var(--ease);
}

.page-faq .diff-panel__label::before {
  content: "";
  width: 12px;
  height: 12px;
  border: 1px solid var(--gold);
  border-radius: 1px;
  transition: background .18s var(--ease), box-shadow .18s var(--ease);
}

.page-faq .diff-panel__box:checked + .diff-panel__label::before {
  background: var(--gold);
  box-shadow: inset 0 0 0 2px var(--glass);
}

.page-faq .diff-panel__box:focus-visible + .diff-panel__label {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.page-faq .diff-panel__box:checked ~ .compare-wrap .compare__row--same {
  display: none;
}

.page-faq .compare-wrap {
  margin-top: 18px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .compare {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 14.5px;
}

.page-faq .compare caption {
  caption-side: top;
  text-align: left;
  padding-bottom: 12px;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--index);
}

.page-faq .compare th,
.page-faq .compare td {
  text-align: left;
  vertical-align: top;
  padding: 14px 14px;
  line-height: 1.75;
  border-bottom: 1px solid rgba(138, 133, 120, .2);
  color: var(--faq-text);
}

.page-faq .compare thead th {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gold);
  border-bottom: 1px solid var(--faq-gold-strong);
  white-space: nowrap;
}

.page-faq .compare tbody th[scope="row"] {
  width: 22%;
  min-width: 116px;
  color: var(--paper);
  font-weight: 700;
}

.page-faq .compare td.is-diff {
  box-shadow: inset 3px 0 0 var(--seal);
  background: rgba(180, 55, 44, .07);
}

.page-faq .compare td[tabindex]:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: -2px;
  background: rgba(201, 162, 39, .12);
}

.page-faq .diff-panel__foot {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--index);
}

/* --- 03 高频问题 --- */
.page-faq .q-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.page-faq .q-filter__box {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-faq .q-chip {
  display: inline-block;
  padding: 7px 14px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--index);
  border: 1px solid rgba(138, 133, 120, .4);
  border-radius: 2px;
  cursor: pointer;
  user-select: none;
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.page-faq .q-chip:hover {
  color: var(--gold-soft);
  border-color: var(--faq-gold-strong);
}

.page-faq .q-filter__box:checked + .q-chip {
  color: var(--ink);
  background: var(--gold);
  border-color: var(--gold);
}

.page-faq .q-filter__box:focus-visible + .q-chip {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.page-faq .q-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-faq .q-item {
  border: 1px solid rgba(58, 46, 36, .9);
  border-radius: 2px;
  background: linear-gradient(180deg, rgba(244, 240, 230, .97) 0%, rgba(235, 229, 216, .94) 100%);
  color: var(--ink);
  overflow: hidden;
  transition: box-shadow .18s var(--ease), transform .18s var(--ease);
}

.page-faq .q-item[open] {
  box-shadow: inset 3px 0 0 var(--seal);
}

.page-faq .q-item summary {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .q-item__label {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink);
}

.page-faq .q-item__no {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--gold-ink);
  border: 1px solid rgba(138, 110, 20, .45);
  border-radius: 2px;
  padding: 2px 8px;
  white-space: nowrap;
  transition: background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .q-item[open] .q-item__no {
  background: var(--seal);
  color: var(--paper);
  border-color: var(--seal);
}

.page-faq .q-item__a {
  padding: 0 18px 18px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--body-mid);
}

.page-faq .q-item__a p {
  margin: 0;
}

.page-faq .q-item__a a {
  color: var(--gold-ink);
  border-bottom-color: rgba(138, 110, 20, .45);
}

/* --- 04 查找路径 --- */
.page-faq .path-board {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: start;
}

.page-faq .path-board__left {
  min-width: 0;
}

.page-faq .path-map {
  display: block;
  width: 100%;
  max-width: 640px;
  height: auto;
  margin: 0 auto 22px;
}

.page-faq .path-map .line {
  fill: none;
  stroke: var(--faq-gold-strong);
  stroke-width: 1.4;
  stroke-linecap: round;
}

.page-faq .path-map .line--hot {
  stroke: var(--gold-soft);
  stroke-width: 2;
}

.page-faq .path-map .node {
  fill: var(--ink);
  stroke: var(--gold);
  stroke-width: 1.6;
}

.page-faq .path-map .node--end {
  fill: var(--seal);
  stroke: var(--gold-soft);
}

.page-faq .path-map .node-label {
  fill: var(--faq-text);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
}

.page-faq .path-map .card {
  fill: rgba(244, 240, 230, .95);
  stroke: var(--gold);
  stroke-width: 1.4;
}

.page-faq .path-map .card-label {
  fill: var(--ink);
  font-size: 13px;
  font-weight: 700;
}

.page-faq .path-map .card-sub {
  fill: var(--body-mid);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
}

.page-faq .path-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-faq .path-card {
  position: relative;
  padding: 18px 18px 18px 20px;
  border: 1px solid var(--faq-umber-line);
  border-left: 3px solid var(--faq-gold-strong);
  border-radius: 2px;
  background: rgba(23, 26, 32, .6);
  transition: transform .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.page-faq .path-card:hover {
  transform: translateY(-2px);
  border-left-color: var(--gold);
  background: rgba(23, 26, 32, .85);
}

.page-faq .path-card__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold);
  margin-bottom: 8px;
}

.page-faq .path-card__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  color: var(--paper);
}

.page-faq .path-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--faq-text);
}

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

.page-faq .note-strip {
  margin: 26px 0 0;
  padding: 14px 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--gold-soft);
  border: 1px dashed var(--faq-gold-line);
  border-radius: 2px;
  background: rgba(201, 162, 39, .05);
}

/* --- 05 人工协助 --- */
.page-faq .help-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: start;
}

.page-faq .help-prep .lead {
  margin-bottom: 20px;
}

.page-faq .help-prep__list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .help-prep__list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 14px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--faq-text);
  border: 1px solid var(--faq-umber-line);
  border-radius: 2px;
  background: rgba(23, 26, 32, .5);
}

.page-faq .help-prep__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-faq .help-prep__tip {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid var(--seal);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--index);
}

.page-faq .help-contact {
  padding: 22px 20px;
  border: 1px solid var(--faq-gold-line);
  border-radius: 2px;
}

.page-faq .help-contact__title {
  margin: 0 0 16px;
  font-size: 14px;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-faq .help-contact__list {
  margin: 0 0 18px;
}

.page-faq .help-contact__row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(138, 133, 120, .22);
}

.page-faq .help-contact__row:last-child {
  border-bottom: none;
}

.page-faq .help-contact__row dt {
  font-size: 14px;
  color: var(--index);
}

.page-faq .help-contact__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--paper);
  word-break: break-all;
}

.page-faq .help-contact__note {
  margin: 0 0 18px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--faq-text);
}

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

.page-faq .help-contact__actions .btn {
  border-bottom: none;
}

.page-faq .help-foot {
  margin: 30px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--faq-gold-line);
  font-size: 14px;
  line-height: 1.85;
  color: var(--index);
}

/* --- 断点 --- */
@media (min-width: 640px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-code__legend {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .group-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .path-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .group-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .path-board {
    grid-template-columns: 1.15fr .85fr;
    gap: 30px;
  }

  .page-faq .path-map {
    margin-left: 0;
    margin-right: 0;
  }

  .page-faq .path-list {
    grid-template-columns: 1fr;
  }

  .page-faq .help-grid {
    grid-template-columns: 1.05fr .95fr;
    gap: 30px;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-shell {
    padding-top: 56px;
  }

  .page-faq .path-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .path-card,
  .page-faq .q-item,
  .page-faq .q-chip,
  .page-faq .diff-panel__label {
    transition: none;
  }

  .page-faq .path-card:hover {
    transform: none;
  }
}