.page-faq {
  --faq-dash: rgba(44, 229, 216, .28);
  --faq-line: rgba(30, 44, 85, .85);
  padding-bottom: clamp(40px, 7vw, 90px);
}

.page-faq .breadcrumb {
  padding-top: clamp(16px, 3vw, 30px);
}

.page-faq .breadcrumb ul {
  display: flex;
  flex-wrap: wrap;
  gap: .5em;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--stone);
}

.page-faq .breadcrumb li + li::before {
  content: "/";
  margin-right: .5em;
  color: rgba(140, 151, 172, .55);
}

.page-faq .breadcrumb a {
  color: var(--stone);
  text-decoration: none;
  transition: color .18s var(--ease);
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--cyan);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4.5vw, 54px) 0 clamp(38px, 6vw, 78px);
  background:
    radial-gradient(120% 90% at 88% 6%, rgba(44, 229, 216, .12), transparent 62%),
    radial-gradient(90% 80% at 4% 100%, rgba(79, 139, 98, .18), transparent 64%),
    var(--ink-deep);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid) 1px, transparent 1px);
  background-size: 88px 88px;
  opacity: .34;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .95), transparent 92%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .95), transparent 92%);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 46px);
}

.page-faq .faq-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero__eyebrow::before {
  content: "";
  display: block;
  width: 26px;
  height: 2px;
  background: var(--cyan);
}

.page-faq .faq-hero h1 {
  margin: 0;
  color: var(--cream);
}

.page-faq .faq-hero__lede {
  max-width: 62ch;
  margin: clamp(16px, 2.5vw, 24px) 0 0;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(242, 239, 230, .82);
}

.page-faq .faq-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

/* 锚点目录 */

.page-faq .dot-index {
  border: 1px solid var(--faq-line);
  border-radius: var(--r-md);
  background: rgba(7, 12, 31, .68);
}

.page-faq .dot-index__title {
  margin: 0;
  padding: 14px 16px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--stone);
}

.page-faq .dot-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .dot-index__list li + li a {
  border-top: 1px solid rgba(30, 44, 85, .75);
}

.page-faq .dot-index__list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  min-height: 44px;
  padding: 11px 16px;
  font-size: 15px;
  color: rgba(242, 239, 230, .88);
  text-decoration: none;
  transition: color .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .dot-index__list a:hover,
.page-faq .dot-index__list a:focus-visible {
  color: var(--cyan);
  background: rgba(44, 229, 216, .07);
}

.page-faq .dot-index__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan);
}

/* ---------- 通用章节 ---------- */

.page-faq .faq-section {
  padding: clamp(44px, 7vw, 88px) 0;
}

.page-faq .faq-section + .faq-section {
  border-top: 1px solid rgba(30, 44, 85, .55);
}

.page-faq .faq-head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(24px, 3.6vw, 40px);
}

.page-faq .faq-head__index {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-head__index::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--faq-dash), transparent);
}

.page-faq .faq-head h2 {
  position: relative;
  margin: 0;
  padding-left: 18px;
  font-size: clamp(24px, 3.6vw, 42px);
  line-height: 1.22;
  letter-spacing: -.02em;
  color: var(--cream);
}

.page-faq .faq-head h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: .18em;
  bottom: .18em;
  width: 8px;
  border-radius: 2px;
  background: var(--cyan);
  transform: skewX(-8deg);
}

.page-faq .faq-head p {
  max-width: 66ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.82;
  color: var(--stone);
}

.page-faq .faq-head a,
.page-faq .pref__list a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(44, 229, 216, .35);
}

.page-faq .faq-head a:hover,
.page-faq .pref__list a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 两端对照表 ---------- */

.page-faq .compare {
  overflow: hidden;
  border: 1px solid var(--faq-line);
  border-radius: var(--r-md);
  background: rgba(7, 12, 31, .58);
}

.page-faq .compare__row {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid rgba(30, 44, 85, .72);
}

.page-faq .compare__row:first-child {
  border-top: 0;
}

.page-faq .compare__q {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0;
  padding: 13px 16px;
  font-size: 15.5px;
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--cream);
  background: rgba(30, 44, 85, .42);
}

.page-faq .compare__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-faq .compare__cell {
  padding: 13px 16px;
  font-size: 15px;
  line-height: 1.74;
  color: rgba(242, 239, 230, .78);
}

.page-faq .compare__cell + .compare__cell {
  border-top: 1px dashed rgba(44, 229, 216, .18);
}

.page-faq .compare__cell p {
  margin: 0;
}

.page-faq .compare__k {
  display: inline-block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.page-faq .compare__cell--d .compare__k {
  color: var(--cyan);
}

.page-faq .compare__cell--m .compare__k {
  color: var(--amber);
}

/* 对照配图 */

.page-faq .compare-visual {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 2.8vw, 30px);
  margin-top: clamp(24px, 3.6vw, 40px);
}

.page-faq .compare-visual figure {
  margin: 0;
}

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

.page-faq .compare-visual figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 三步上手 ---------- */

.page-faq .steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2.4vw, 26px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .steps__item {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--faq-line);
  border-radius: var(--r-md);
  background: rgba(7, 12, 31, .62);
}

.page-faq .steps__item::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(to right, var(--cyan), var(--turf), transparent);
  opacity: .75;
}

.page-faq .steps__num {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-faq .steps__item h3 {
  margin: 0 0 10px;
  font-size: 19px;
  line-height: 1.45;
  letter-spacing: -.01em;
  color: var(--cream);
}

.page-faq .steps__item p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.82;
  color: rgba(242, 239, 230, .76);
}

.page-faq .steps__item a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(44, 229, 216, .35);
}

.page-faq .steps__item a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 偏好同步 ---------- */

.page-faq .pref {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 40px);
}

.page-faq .pref__list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--faq-line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--faq-line);
}

.page-faq .pref__list li {
  padding: 16px 18px;
  background: rgba(7, 12, 31, .78);
}

.page-faq .pref__list strong {
  display: block;
  margin-bottom: 6px;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--cyan);
}

.page-faq .pref__list span {
  display: block;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(242, 239, 230, .76);
}

.page-faq .pref__aside {
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid rgba(79, 139, 98, .42);
  border-radius: var(--r-md);
  background:
    radial-gradient(110% 130% at 100% 0%, rgba(79, 139, 98, .2), transparent 66%),
    rgba(11, 18, 48, .7);
}

.page-faq .pref__kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--turf);
}

.page-faq .pref__text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(242, 239, 230, .8);
}

/* ---------- 自查筛选 ---------- */

.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}

.page-faq .filter-btn {
  appearance: none;
  cursor: pointer;
  min-height: 40px;
  padding: 9px 16px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  color: rgba(242, 239, 230, .82);
  background: rgba(11, 18, 48, .72);
  border: 1px solid var(--faq-line);
  border-radius: 999px;
  transition: color .18s var(--ease), background-color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .filter-btn:hover {
  color: var(--cream);
  border-color: rgba(44, 229, 216, .5);
}

.page-faq .filter-btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .filter-btn[aria-pressed="true"] {
  color: var(--ink-deep);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .filter-count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--stone);
}

.page-faq .filter-empty {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--stone);
}

/* ---------- 手风琴 ---------- */

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

.page-faq .selfcheck > li {
  min-width: 0;
}

.page-faq .qa {
  border: 1px solid var(--faq-line);
  border-radius: var(--r-md);
  background: rgba(7, 12, 31, .62);
  overflow: hidden;
  transition: transform .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .qa[open] {
  transform: translateX(-8px);
  border-color: rgba(44, 229, 216, .48);
  background: rgba(11, 18, 48, .92);
}

.page-faq .qa__summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.58;
  color: var(--cream);
}

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

.page-faq .qa__summary::after {
  content: "+";
  flex: 0 0 auto;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
  transition: transform .2s var(--ease);
}

.page-faq .qa[open] .qa__summary::after {
  content: "–";
}

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

.page-faq .qa__tag {
  flex: 0 0 auto;
  margin-top: 2px;
  padding: 3px 8px;
  border: 1px solid currentColor;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  font-weight: 400;
}

.page-faq .qa__tag--account {
  color: var(--cyan);
}

.page-faq .qa__tag--content {
  color: var(--amber);
}

.page-faq .qa__tag--device {
  color: var(--clay);
}

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

.page-faq .qa__body {
  padding: 0 18px 18px;
  font-size: 15.5px;
  line-height: 1.82;
  color: rgba(242, 239, 230, .78);
}

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

.page-faq .qa__body p + p {
  margin-top: 10px;
}

.page-faq .qa__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(44, 229, 216, .35);
}

.page-faq .qa__body a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 收尾 ---------- */

.page-faq .closing {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4.5vw, 52px);
  border: 1px solid rgba(44, 229, 216, .32);
  border-radius: var(--r-lg);
  background:
    radial-gradient(80% 130% at 100% 0%, rgba(44, 229, 216, .16), transparent 62%),
    radial-gradient(70% 120% at 0% 110%, rgba(196, 106, 69, .18), transparent 66%),
    linear-gradient(180deg, rgba(7, 12, 31, .95), rgba(11, 18, 48, .95));
}

.page-faq .closing__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-faq .closing h2 {
  margin: 0 0 12px;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.25;
  letter-spacing: -.02em;
  color: var(--cream);
}

.page-faq .closing p {
  max-width: 58ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.82;
  color: rgba(242, 239, 230, .8);
}

.page-faq .closing__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--stone);
}

.page-faq .closing__act {
  display: flex;
  align-items: center;
}

/* ---------- 断点 ---------- */

@media (min-width: 780px) {
  .page-faq .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-faq .compare-visual {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .closing__inner {
    grid-template-columns: minmax(0, 1.5fr) auto;
    align-items: center;
    gap: 40px;
  }
}

@media (min-width: 900px) {
  .page-faq .pref {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 940px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, .78fr);
    align-items: end;
  }

  .page-faq .compare__row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr) minmax(0, 1.25fr);
  }

  .page-faq .compare__q {
    align-items: center;
    padding: 18px 20px;
    font-size: 16px;
    background: rgba(30, 44, 85, .26);
  }

  .page-faq .compare__cell,
  .page-faq .compare__cell + .compare__cell {
    padding: 18px 20px;
    border-top: 0;
    border-left: 1px dashed var(--faq-dash);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__summary::after,
  .page-faq .filter-btn,
  .page-faq .dot-index__list a {
    transition: none;
  }

  .page-faq .qa[open] {
    transform: none;
  }
}