.page-faq {
  --faq-measure: 64ch;
  --faq-gap: clamp(18px, 3vw, 34px);
}

.page-faq :is(a, button, summary, input):focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

/* 首屏 */
.page-faq .faq-intro {
  padding: clamp(22px, 3.4vw, 40px) 0 clamp(20px, 3vw, 30px);
  display: grid;
  gap: clamp(12px, 1.8vw, 20px);
  max-width: 880px;
}

.page-faq .faq-intro h1 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(30px, 5.4vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--bone);
  text-wrap: balance;
}

.page-faq .faq-intro__lead {
  margin: 0;
  max-width: var(--faq-measure);
  font-size: 16px;
  line-height: 1.72;
  color: var(--silver);
}

.page-faq .faq-banner {
  margin: 0 0 clamp(24px, 4vw, 44px);
}

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

/* 章节标题 */
.page-faq .faq-h2 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(22px, 2.6vw, 32px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--bone);
}

.page-faq .faq-h2__lead {
  margin: 0 0 var(--faq-gap);
  max-width: var(--faq-measure);
  font-size: 15px;
  line-height: 1.7;
  color: var(--stone);
}

/* 分段切换 */
.page-faq .faq-tablist {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-top: var(--faq-gap);
}

.page-faq .faq-tablist .tab {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  padding: 14px 14px 16px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: 0;
  color: var(--silver);
  font-family: var(--font-head);
  font-size: 15px;
  letter-spacing: 0.01em;
  text-align: left;
  cursor: pointer;
  transition: background 200ms var(--ease), border-color 200ms var(--ease), color 200ms var(--ease);
}

.page-faq .faq-tablist .tab::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: transparent;
  transition: background 200ms var(--ease);
}

.page-faq .faq-tablist .tab:hover {
  border-color: var(--stone);
  color: var(--bone);
}

.page-faq .faq-tablist .tab[aria-selected="true"] {
  background: var(--ink);
  border-color: rgba(200, 249, 78, 0.55);
  color: var(--bone);
}

.page-faq .faq-tablist .tab[aria-selected="true"]::after {
  background: var(--lime);
}

.page-faq .tab__num {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--stone);
}

.page-faq .faq-tablist .tab[aria-selected="true"] .tab__num {
  color: var(--lime);
}

.page-faq .tab__label {
  font-size: 15px;
  font-weight: 600;
}

/* 面板与问答 */
.page-faq .faq-panel {
  padding-top: clamp(20px, 3vw, 32px);
  animation: faq-fade 200ms var(--ease) both;
}

.page-faq .faq-panel[hidden] {
  display: none;
}

@keyframes faq-fade {
  from { opacity: 0; }
  to { opacity: 1; }
}

.page-faq .qa-stack {
  border-top: 1px solid var(--line);
}

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

.page-faq .qa__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: baseline;
  padding: 17px 8px 17px 14px;
  border-left: 3px solid transparent;
  list-style: none;
  cursor: pointer;
  transition: background 200ms var(--ease), border-color 200ms var(--ease);
}

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

.page-faq .qa__q:hover {
  background: rgba(200, 249, 78, 0.045);
}

.page-faq .qa[open] > .qa__q {
  border-left-color: var(--orange);
  background: rgba(255, 106, 43, 0.05);
}

.page-faq .qa__index {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--stone);
}

.page-faq .qa[open] .qa__index {
  color: var(--orange);
}

.page-faq .qa__text {
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--bone);
}

.page-faq .qa__mark {
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--lime);
  transition: transform 200ms var(--ease);
}

.page-faq .qa[open] .qa__mark {
  transform: rotate(45deg);
}

.page-faq .qa__a {
  padding: 0 8px 22px 41px;
}

.page-faq .qa__a p {
  margin: 0 0 9px;
  max-width: var(--faq-measure);
  font-size: 15px;
  line-height: 1.74;
  color: var(--silver);
}

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

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

.page-faq .qa__a a:hover {
  color: var(--bone);
}

/* 三步自查 */
.page-faq .checks {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

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

.page-faq .steps {
  list-style: none;
  margin: var(--faq-gap) 0 0;
  padding: 0;
}

.page-faq .steps__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(12px, 2vw, 20px);
  padding: clamp(16px, 2.4vw, 24px) 0;
  border-top: 1px dashed var(--line);
}

.page-faq .steps__n {
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1;
  font-weight: 700;
  color: rgba(200, 249, 78, 0.75);
}

.page-faq .steps__label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.page-faq .steps__check {
  flex: none;
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: var(--lime);
  cursor: pointer;
}

.page-faq .steps__title {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--bone);
  transition: color 200ms var(--ease);
}

.page-faq .steps__check:checked + .steps__title {
  color: var(--stone);
  text-decoration: line-through;
}

.page-faq .steps__desc {
  margin: 8px 0 0;
  max-width: 54ch;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--silver);
}

.page-faq .checks__media {
  margin: 0;
  align-self: start;
}

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

/* 数据反馈 */
.page-faq .faq-feedback {
  padding: clamp(20px, 3vw, 34px);
}

.page-faq .faq-feedback__title {
  margin: 0 0 var(--faq-gap);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(21px, 2.5vw, 30px);
  line-height: 1.25;
  color: var(--bone);
}

.page-faq .faq-feedback__grid {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-faq .faq-feedback__sub {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--moss);
}

.page-faq .faq-feedback__list {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq .faq-feedback__list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--silver);
}

.page-faq .faq-feedback__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  background: var(--lime);
}

.page-faq .faq-feedback__note {
  margin: 0;
  max-width: 46ch;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--stone);
}

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

.page-faq .faq-feedback__note a:hover {
  color: var(--lime);
}

.page-faq .faq-feedback__col--mail {
  display: grid;
  gap: 12px;
  padding: clamp(16px, 2.4vw, 22px);
  background: var(--ink-2);
  border: 1px solid var(--line);
  align-content: start;
}

.page-faq .faq-feedback__label {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--stone);
}

.page-faq .faq-feedback__mail {
  font-family: var(--font-mono);
  font-size: clamp(15px, 2vw, 19px);
  color: var(--lime);
  text-decoration: none;
  word-break: break-all;
}

.page-faq .faq-feedback__mail:hover {
  color: var(--bone);
}

.page-faq .faq-feedback__col--mail .btn {
  justify-self: start;
}

/* 仍未解决 */
.page-faq .faq-help__lead {
  margin: 0 0 var(--faq-gap);
  max-width: var(--faq-measure);
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--silver);
}

.page-faq .faq-help__grid {
  display: grid;
  gap: 12px;
}

.page-faq .faq-help__card {
  display: grid;
  gap: 8px;
  padding: clamp(16px, 2.4vw, 22px);
  background: var(--ink-2);
  border-left: 3px solid var(--stone);
  align-content: start;
}

.page-faq .faq-help__card--wide {
  border-left-color: var(--lime);
}

.page-faq .faq-help__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--stone);
}

.page-faq .faq-help__value {
  font-family: var(--font-mono);
  font-size: clamp(15px, 2vw, 18px);
  color: var(--bone);
  text-decoration: none;
  word-break: break-all;
}

.page-faq .faq-help__value:hover {
  color: var(--lime);
}

.page-faq .faq-help__card .meta {
  margin: 0;
}

.page-faq .faq-help__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--silver);
}

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

/* 响应式 */
@media (min-width: 640px) {
  .page-faq .faq-help__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-help__card--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-tablist {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
  }

  .page-faq .faq-feedback__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
  }
}

@media (min-width: 900px) {
  .page-faq .checks {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: start;
  }

  .page-faq .checks__media {
    margin-top: 6px;
  }
}

@media (max-width: 639px) {
  .page-faq .qa__a {
    padding-left: 28px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-panel,
  .page-faq .qa__mark,
  .page-faq .qa__q,
  .page-faq .faq-tablist .tab,
  .page-faq .steps__title {
    animation: none;
    transition: none;
  }
}