.page-faq {
  --faq-pad: clamp(16px, 4vw, 32px);
  --faq-rule: var(--hair);
}

.page-faq .grid {
  gap: clamp(22px, 3vw, 44px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  background: var(--c-mist);
  border-bottom: var(--hair);
  padding: clamp(22px, 4vw, 36px) 0 clamp(40px, 7vw, 76px);
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: clamp(30px, 7vw, 58px);
  line-height: 1.16;
  color: var(--c-ink);
  margin: 14px 0 0;
  max-width: 14em;
}

.page-faq .faq-hero .lede {
  margin-top: 18px;
  max-width: 40em;
  color: var(--c-deep);
}

.page-faq .faq-hero__aside {
  border-left: 2px solid var(--c-blue);
  padding-left: 18px;
  margin-top: 6px;
}

.page-faq .faq-hero__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-blue);
  text-transform: uppercase;
}

.page-faq .faq-quick {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-quick__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  align-items: start;
  font-size: 15px;
  line-height: 1.65;
  color: var(--c-ink);
}

.page-faq .faq-quick__n {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-orange-deep);
  padding-top: 3px;
}

/* ---------- 章节通用 ---------- */
.page-faq .sec-head {
  margin: 0 0 20px;
}

.page-faq .faq-intro {
  margin: 0 0 26px;
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-ink);
}

.page-faq .faq-note {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-gray);
}

.page-faq .faq-note a,
.page-faq .faq-intro a,
.page-faq .steps a,
.page-faq .qa__body a,
.page-faq .compat__val a {
  color: var(--c-blue);
  text-decoration: none;
  border-bottom: 1px solid var(--c-line);
  transition: color 160ms linear, border-color 160ms linear;
}

.page-faq .faq-note a:hover,
.page-faq .faq-intro a:hover,
.page-faq .steps a:hover,
.page-faq .qa__body a:hover,
.page-faq .compat__val a:hover {
  color: var(--c-orange-deep);
  border-color: var(--c-orange-deep);
}

/* ---------- 01 现象对照 ---------- */
.page-faq .pairs {
  border-bottom: var(--hair);
}

.page-faq .pair {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding: 20px 0;
  border-top: var(--hair);
}

.page-faq .pair__phen {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--c-deep);
}

.page-faq .pair__fix {
  min-width: 0;
  border-left: 2px solid var(--c-gold);
  padding-left: 14px;
}

.page-faq .pair__note {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--c-gray);
}

/* ---------- 步骤列表 ---------- */
.page-faq .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .steps > li {
  display: grid;
  grid-template-columns: 2.4em 1fr;
  gap: 8px;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--c-ink);
}

.page-faq .steps--tall {
  gap: 16px;
  margin-top: 4px;
}

.page-faq .steps--tall > li {
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(159, 191, 204, 0.5);
}

.page-faq .steps--tall > li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .steps__n {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--c-gold);
  padding-top: 4px;
}

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

/* ---------- 折叠问答 ---------- */
.page-faq .qa-list {
  border-bottom: var(--hair);
}

.page-faq .qa {
  border-top: var(--hair);
  padding-left: 14px;
  background: transparent;
  box-shadow: inset 0 0 0 0 var(--c-gold);
  transition: box-shadow 200ms linear, background-color 160ms linear;
}

.page-faq .qa[open] {
  box-shadow: inset 4px 0 0 0 var(--c-gold);
  background: rgba(220, 238, 245, 0.38);
}

.page-faq .qa__summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: baseline;
  gap: 4px 14px;
  padding: 18px 14px 18px 4px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.5;
  letter-spacing: 0.03em;
  color: var(--c-deep);
  transition: color 160ms linear;
}

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

.page-faq .qa__summary:hover {
  color: var(--c-orange-deep);
}

.page-faq .qa__summary:focus-visible {
  outline: 2px solid var(--c-blue);
  outline-offset: 2px;
}

.page-faq .qa__summary::after {
  content: "＋";
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
  color: var(--c-blue);
}

.page-faq .qa[open] > .qa__summary::after {
  content: "－";
  color: var(--c-orange-deep);
}

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

.page-faq .qa__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--c-gray);
  white-space: nowrap;
}

.page-faq .qa__body {
  padding: 0 14px 22px 4px;
}

.page-faq .qa__body p {
  margin: 0 0 10px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--c-ink);
}

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

/* ---------- 分隔带 ---------- */
.page-faq .faq-divider {
  background: var(--c-blue);
  padding: clamp(18px, 3vw, 26px) 0;
}

.page-faq .faq-divider--soft {
  background: var(--c-mist);
  border-top: var(--hair);
  border-bottom: var(--hair);
}

.page-faq .faq-divider__text {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.75;
  letter-spacing: 0.08em;
  color: var(--c-snow);
}

.page-faq .faq-divider__text--dark {
  color: var(--c-deep);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 0 0 clamp(26px, 4vw, 42px);
}

.page-faq .faq-figure .media {
  border: var(--hair);
  overflow: hidden;
}

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

.page-faq .media__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-gray);
}

.page-faq .faq-figure--side {
  margin: 26px 0 0;
}

/* ---------- 03 判断结果 ---------- */
.page-faq .faq-sec--tool {
  padding-top: 0;
}

.page-faq .faq-verdict {
  border-top: 2px solid var(--c-blue);
  padding-top: 18px;
}

.page-faq .faq-verdict__title {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-blue);
}

.page-faq .faq-verdict__list {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-faq .faq-verdict__row {
  padding: 14px 0;
  border-bottom: var(--hair);
}

.page-faq .faq-verdict__row:last-child {
  border-bottom: 0;
}

.page-faq .faq-verdict__row dt {
  font-weight: 700;
  font-size: 15px;
  line-height: 1.5;
  color: var(--c-deep);
  position: relative;
  padding-left: 14px;
}

.page-faq .faq-verdict__row dt::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--c-gold);
}

.page-faq .faq-verdict__row dd {
  margin: 6px 0 0 14px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-gray);
}

/* ---------- 04 兼容表 ---------- */
.page-faq .compat {
  margin: 0 0 30px;
  border-top: var(--hair);
  border-bottom: var(--hair);
}

.page-faq .compat__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 13px clamp(10px, 2vw, 18px);
  border-bottom: 1px solid rgba(159, 191, 204, 0.5);
}

.page-faq .compat__row:last-child {
  border-bottom: 0;
}

.page-faq .compat__row:nth-child(even) {
  background: var(--c-mist);
}

.page-faq .compat__key {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--c-blue);
}

.page-faq .compat__val {
  font-size: 15px;
  line-height: 1.65;
  color: var(--c-ink);
}

/* ---------- 05 浅青雾分区 ---------- */
.page-faq .faq-sec--mist {
  background: var(--c-mist);
  border-top: var(--hair);
  border-bottom: var(--hair);
}

.page-faq .faq-sec--mist .qa-list {
  border-bottom-color: var(--c-line);
}

.page-faq .faq-sec--mist .qa {
  border-top-color: var(--c-line);
}

.page-faq .faq-sec--mist .qa[open] {
  background: rgba(251, 252, 253, 0.86);
}

.page-faq .faq-sec--mist .faq-figure .media {
  background: var(--c-snow);
}

/* ---------- 06 联系 ---------- */
.page-faq .faq-contact {
  background: var(--c-deep);
  color: var(--c-snow);
}

.page-faq .faq-contact .sec-num {
  color: var(--c-gold);
}

.page-faq .faq-contact .sec-title {
  color: var(--c-snow);
}

.page-faq .faq-contact__lead {
  margin: 0 0 26px;
  max-width: 44ch;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(251, 252, 253, 0.86);
}

.page-faq .faq-contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(159, 191, 204, 0.45);
}

.page-faq .faq-contact__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(159, 191, 204, 0.45);
}

.page-faq .faq-contact__key {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-gold);
}

.page-faq .faq-contact__val {
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-snow);
  word-break: break-word;
}

.page-faq .faq-contact__panel {
  border: 1px solid rgba(159, 191, 204, 0.45);
  padding: clamp(18px, 3vw, 26px);
  margin-top: 6px;
}

.page-faq .faq-contact__panel-title {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-gold);
}

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

.page-faq .faq-check li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(251, 252, 253, 0.9);
}

.page-faq .faq-check li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  background: var(--c-orange);
}

.page-faq .faq-contact__note {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: rgba(251, 252, 253, 0.7);
}

.page-faq .faq-contact__foot {
  margin: 30px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(251, 252, 253, 0.8);
}

.page-faq .faq-contact__foot a {
  color: var(--c-snow);
  text-decoration: none;
  border-bottom: 1px solid var(--c-orange);
  transition: color 160ms linear, border-color 160ms linear;
}

.page-faq .faq-contact__foot a:hover {
  color: var(--c-gold);
  border-color: var(--c-gold);
}

/* ---------- 回到顶部 ---------- */
.page-faq .faq-top {
  position: fixed;
  right: clamp(14px, 2.5vw, 26px);
  bottom: clamp(14px, 2.5vw, 26px);
  z-index: 20;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  background: var(--c-orange);
  color: var(--c-snow);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  border: 1px solid var(--c-orange-deep);
  transition: background-color 160ms linear;
}

.page-faq .faq-top:hover {
  background: var(--c-orange-deep);
}

.page-faq .faq-top:focus-visible {
  outline: 2px solid var(--c-snow);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-faq .compat__row {
    grid-template-columns: minmax(0, 0.55fr) minmax(0, 1.45fr);
    gap: 16px;
    align-items: baseline;
  }

  .page-faq .faq-contact__item {
    grid-template-columns: minmax(0, 0.44fr) minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
}

@media (min-width: 760px) {
  .page-faq .pair {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.6fr);
    gap: 0;
    padding: 24px 0;
  }

  .page-faq .pair__phen {
    padding-right: 24px;
    border-right: var(--hair);
  }

  .page-faq .pair__fix {
    padding-left: clamp(20px, 3vw, 36px);
    border-left: 0;
  }
}

@media (max-width: 599px) {
  .page-faq .qa__meta {
    display: none;
  }

  .page-faq .qa__summary {
    grid-template-columns: 1fr auto;
  }

  .page-faq .faq-top {
    width: 40px;
    height: 40px;
    font-size: 15px;
  }
}

@media (min-width: 901px) {
  .page-faq .faq-figure--side {
    margin-top: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__summary,
  .page-faq .faq-top,
  .page-faq .faq-note a,
  .page-faq .qa__body a,
  .page-faq .compat__val a,
  .page-faq .faq-contact__foot a {
    transition: none;
  }
}