.page-faq {
  --faq-tab-gap: .25rem;
  --faq-panel-gap: clamp(1.5rem, 4vw, 3rem);
  padding-bottom: clamp(3rem, 8vw, 6rem);
  color: var(--text-base);
}

.page-faq .faq-hero {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  padding: clamp(1.75rem, 5vw, 3.25rem) 0 clamp(2rem, 4vw, 3rem);
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-hero__main {
  position: relative;
  padding-left: clamp(1rem, 3vw, 1.75rem);
  border-left: 1px solid var(--hairline-gold);
}

.page-faq .faq-hero__main::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 0;
  width: 1px;
  height: 58px;
  background: var(--gold-500);
  box-shadow: 0 0 12px rgba(201, 162, 75, .45);
}

.page-faq .faq-hero__eyebrow {
  margin: 0 0 .85rem;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold-300);
}

.page-faq .faq-hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.75rem, 4.4vw, 2.9rem);
  line-height: 1.14;
  letter-spacing: -.015em;
  color: var(--white);
  max-width: 20em;
}

.page-faq .faq-hero__lead {
  margin: 0 0 1.6rem;
  font-size: var(--fs-body);
  line-height: 1.78;
  color: var(--text-base);
  max-width: 40em;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
}

.page-faq .faq-hero__panel {
  position: relative;
  padding: 1.25rem 1.35rem 1.1rem;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-m);
  background: linear-gradient(180deg, rgba(16, 38, 58, .88), rgba(11, 27, 43, .74));
  box-shadow: var(--shadow-card);
}

.page-faq .faq-hero__panel::before,
.page-faq .faq-hero__panel::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1px solid var(--gold-500);
  opacity: .75;
}

.page-faq .faq-hero__panel::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-faq .faq-hero__panel::after {
  right: -1px;
  bottom: -1px;
  border-top: 0;
  border-left: 0;
}

.page-faq .faq-hero__panel-title {
  margin: 0 0 .5rem;
  font-size: var(--fs-micro);
  letter-spacing: .12em;
  text-transform: uppercase;
  font-family: var(--font-mono);
  color: var(--text-mute);
}

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

.page-faq .faq-hero__list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: .68rem 0;
  border-bottom: 1px dashed var(--hairline-soft);
  font-size: var(--fs-small);
  color: var(--text-strong);
}

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

.page-faq .faq-hero__list .num {
  color: var(--gold-300);
  font-size: var(--fs-micro);
}

.page-faq .faq-hero__note {
  margin: .6rem 0 0;
  font-size: var(--fs-micro);
  color: var(--text-mute);
  line-height: 1.6;
}

/* ---- 分组切换 ---- */

.page-faq .faq-groups {
  padding-top: clamp(2.25rem, 5vw, 3.5rem);
}

.page-faq .faq-groups__head {
  max-width: 46em;
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}

.page-faq .faq-groups__head h2 {
  margin: 0 0 .6rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-h2);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-faq .faq-groups__head p {
  margin: 0;
  font-size: var(--fs-small);
  line-height: 1.75;
  color: var(--text-mute);
}

.page-faq .faq-tabs {
  display: flex;
  gap: var(--faq-tab-gap);
  overflow-x: auto;
  overscroll-behavior-x: contain;
  border-bottom: 1px solid var(--hairline);
  scrollbar-width: none;
}

.page-faq .faq-tabs::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-tab {
  position: relative;
  flex: 0 0 auto;
  padding: .85rem .9rem;
  border: 0;
  background: none;
  color: var(--text-mute);
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-tab::after {
  content: "";
  position: absolute;
  left: .75rem;
  right: .75rem;
  bottom: -1px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--gold-500), var(--gold-300));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 180ms var(--ease);
}

.page-faq .faq-tab:hover {
  color: var(--text-strong);
}

.page-faq .faq-tab[aria-selected="true"] {
  color: var(--gold-300);
}

.page-faq .faq-tab[aria-selected="true"]::after {
  transform: scaleX(1);
}

.page-faq .faq-tab:focus-visible {
  outline: 2px solid var(--amber-500);
  outline-offset: 2px;
  border-radius: var(--radius-s);
}

/* ---- 面板 ---- */

.page-faq .faq-panel {
  display: block;
}

.page-faq .faq-panel__grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
  padding-top: clamp(1.5rem, 3vw, 2.25rem);
}

.page-faq .faq-toc {
  display: none;
}

.page-faq .faq-toc__title {
  margin: 0 0 .75rem;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-mute);
}

.page-faq .faq-toc ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-toc a {
  display: flex;
  gap: .55rem;
  padding: .5rem 0 .5rem .8rem;
  border-left: 1px solid var(--hairline-soft);
  color: var(--text-mute);
  font-size: var(--fs-small);
  line-height: 1.55;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-toc a::before {
  content: counter(toc, decimal-leading-zero);
  counter-increment: toc;
  font-family: var(--font-mono);
  font-size: .68rem;
  color: var(--gold-500);
  padding-top: .18rem;
}

.page-faq .faq-toc ol {
  counter-reset: toc;
}

.page-faq .faq-toc a:hover,
.page-faq .faq-toc a:focus-visible {
  color: var(--text-strong);
  border-left-color: var(--gold-500);
}

/* ---- 问答 ---- */

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

.page-faq .qa {
  margin-bottom: .8rem;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-m);
  background: rgba(16, 38, 58, .5);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  scroll-margin-top: 7rem;
}

.page-faq .qa[open] {
  border-color: var(--hairline-gold);
  box-shadow: var(--shadow-card);
}

.page-faq .qa__q {
  display: flex;
  align-items: center;
  gap: .85rem;
  padding: 1.05rem 1.15rem;
  cursor: pointer;
  list-style: none;
  color: var(--text-strong);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-body);
  line-height: 1.5;
}

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

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--amber-500);
  outline-offset: -2px;
}

.page-faq .qa__no {
  flex: 0 0 auto;
  font-size: var(--fs-micro);
  letter-spacing: .06em;
  color: var(--gold-500);
}

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

.page-faq .qa__mark {
  position: relative;
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  margin-left: auto;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1.5px;
  background: var(--gold-300);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .qa__mark::before {
  transform: translateY(-50%);
}

.page-faq .qa__mark::after {
  transform: translateY(-50%) rotate(90deg);
}

.page-faq .qa[open] .qa__mark::after {
  transform: translateY(-50%) rotate(0deg);
  opacity: 0;
}

.page-faq .qa__body {
  padding: 0 1.15rem 1.2rem;
  border-top: 1px dashed var(--hairline-soft);
  margin-top: -.1rem;
  padding-top: 1rem;
}

.page-faq .qa__body p {
  margin: 0;
  font-size: var(--fs-small);
  line-height: 1.78;
  color: var(--text-base);
}

/* ---- 编号步骤 ---- */

.page-faq .steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.page-faq .steps > li {
  position: relative;
  padding-left: 2.4rem;
  padding-bottom: .95rem;
  counter-increment: step;
}

.page-faq .steps > li:last-child {
  padding-bottom: .2rem;
}

.page-faq .steps > li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: .05rem;
  width: 1.7rem;
  height: 1.7rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--hairline-gold);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: 0;
  color: var(--gold-300);
  background: rgba(201, 162, 75, .06);
}

.page-faq .steps > li::after {
  content: "";
  position: absolute;
  left: .85rem;
  top: 1.85rem;
  bottom: .15rem;
  width: 1px;
  background: var(--hairline-soft);
}

.page-faq .steps > li:last-child::after {
  display: none;
}

.page-faq .hint {
  margin: .9rem 0 0;
  padding: .75rem .95rem;
  border-left: 2px solid var(--celadon-500);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  background: rgba(78, 158, 143, .09);
  font-size: var(--fs-small);
  line-height: 1.75;
  color: var(--text-base);
}

.page-faq .qa__figure {
  margin: 0 0 1.1rem;
}

.page-faq .qa__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-m);
  object-fit: cover;
  background: var(--ink-800);
}

.page-faq .qa__caption {
  margin-top: .55rem;
  font-size: var(--fs-micro);
  color: var(--text-mute);
  line-height: 1.6;
}

/* ---- 故障自查 ---- */

.page-faq .self-check {
  margin-top: clamp(3rem, 7vw, 5rem);
  padding-top: clamp(2rem, 4vw, 3rem);
  border-top: 1px solid var(--hairline);
  scroll-margin-top: 6rem;
}

.page-faq .self-check__head {
  max-width: 48em;
  margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
}

.page-faq .self-check__head h2 {
  margin: 0 0 .6rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-h2);
  line-height: 1.2;
  color: var(--white);
}

.page-faq .self-check__head p {
  margin: 0;
  font-size: var(--fs-small);
  line-height: 1.78;
  color: var(--text-mute);
}

.page-faq .check-grid {
  display: grid;
  gap: 1rem;
}

.page-faq .check-card {
  padding: 1.15rem 1.2rem 1.25rem;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-m);
  background: linear-gradient(180deg, rgba(16, 38, 58, .72), rgba(7, 19, 34, .58));
  box-shadow: var(--shadow-card);
}

.page-faq .check-card__label {
  display: inline-block;
  margin: 0 0 .55rem;
  padding: .18rem .5rem;
  border: 1px solid var(--hairline-gold);
  border-radius: var(--radius-pill);
  font-size: var(--fs-micro);
  letter-spacing: .08em;
  color: var(--gold-300);
}

.page-faq .check-card h3 {
  margin: 0 0 .9rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-h3);
  line-height: 1.35;
  color: var(--white);
}

.page-faq .check-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: chk;
}

.page-faq .check-list > li {
  position: relative;
  padding-left: 1.85rem;
  padding-bottom: .7rem;
  counter-increment: chk;
  font-size: var(--fs-small);
  line-height: 1.72;
  color: var(--text-base);
}

.page-faq .check-list > li:last-child {
  padding-bottom: 0;
}

.page-faq .check-list > li::before {
  content: counter(chk) ".";
  position: absolute;
  left: 0;
  top: 0;
  width: 1.4rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  line-height: 1.9;
  color: var(--celadon-500);
}

/* ---- 支持 ---- */

.page-faq .support {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  margin-top: clamp(3rem, 7vw, 5rem);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid var(--hairline-gold);
  border-radius: var(--radius-m);
  background: linear-gradient(120deg, rgba(16, 38, 58, .95) 0%, rgba(11, 27, 43, .78) 60%, rgba(23, 51, 76, .7) 100%);
  box-shadow: var(--shadow-card);
}

.page-faq .support__text h2 {
  margin: 0 0 .7rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-h2);
  line-height: 1.2;
  color: var(--white);
}

.page-faq .support__text p {
  margin: 0 0 1.3rem;
  font-size: var(--fs-body);
  line-height: 1.78;
  color: var(--text-base);
  max-width: 44em;
}

.page-faq .support__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
}

.page-faq .support__aside-title {
  margin: 0 0 .7rem;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-mute);
}

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

.page-faq .support__links li + li {
  margin-top: .1rem;
}

.page-faq .support__links a {
  display: block;
  padding: .55rem 0;
  border-bottom: 1px dashed var(--hairline-soft);
  color: var(--text-base);
  font-size: var(--fs-small);
  text-decoration: none;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-faq .support__links a:hover,
.page-faq .support__links a:focus-visible {
  color: var(--gold-300);
  padding-left: .35rem;
}

/* ---- 响应式 ---- */

@media (min-width: 720px) {
  .page-faq .check-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .support {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-panel__grid {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: var(--faq-panel-gap);
  }

  .page-faq .faq-toc {
    display: block;
    position: sticky;
    top: 7rem;
    align-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-tab::after,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .qa,
  .page-faq .faq-toc a,
  .page-faq .support__links a {
    transition: none;
  }
}