.page-faq {
  --faq-rule: rgba(18, 58, 87, 0.85);
  --faq-gap: clamp(1.5rem, 4vw, 3.5rem);
  background: var(--ink-900);
  color: var(--white);
  overflow-x: clip;
}

/* ── 首屏 ───────────────────────────── */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(1.25rem, 3vw, 2.25rem) 0 clamp(2.5rem, 6vw, 4.25rem);
  background:
    radial-gradient(130% 100% at 92% -10%, rgba(0, 229, 200, 0.18), transparent 58%),
    radial-gradient(90% 80% at 4% 112%, rgba(255, 107, 69, 0.13), transparent 62%),
    linear-gradient(168deg, var(--ink-800) 0%, var(--ink-900) 64%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -22%;
  right: -20%;
  width: 64%;
  height: 152%;
  background: linear-gradient(205deg, rgba(0, 229, 200, 0.17), rgba(0, 229, 200, 0) 72%);
  clip-path: polygon(34% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.75rem);
}

.page-faq .faq-hero .breadcrumbs {
  margin-bottom: 1rem;
}

.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 6.2vw, 3.4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0.55rem 0 1rem;
  text-wrap: balance;
}

.page-faq .faq-hero .lead {
  max-width: 62ch;
  color: var(--muted);
  line-height: 1.75;
  margin: 0;
}

.page-faq .faq-hero__panel {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.page-faq .faq-hero__panel .stat {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.95rem 1.15rem;
  background: linear-gradient(140deg, var(--panel), var(--panel-deep));
}

.page-faq .faq-hero__panel .stat__value {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.45rem;
  font-weight: 600;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-hero__panel .stat__label {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--muted);
}

@media (min-width: 960px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(240px, 0.6fr);
    align-items: end;
  }
  .page-faq .faq-hero__panel {
    align-self: end;
  }
}

/* ── 主体两栏 ───────────────────────── */
.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  padding: clamp(2rem, 5vw, 3.75rem) 0 clamp(3rem, 7vw, 5.5rem);
}

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

/* 章节目录 */
.page-faq .faq-index__title {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 0.7rem;
}

.page-faq .faq-index__list {
  display: flex;
  gap: 0.45rem;
  margin: 0;
  padding: 0 0 0.65rem;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__list::-webkit-scrollbar {
  height: 3px;
}

.page-faq .faq-index__list::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 3px;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.45rem 0.7rem;
  white-space: nowrap;
  font-size: 0.875rem;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(10, 33, 54, 0.55);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--coral);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--white);
  border-color: rgba(0, 229, 200, 0.55);
  background: rgba(0, 229, 200, 0.07);
}

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

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: 216px minmax(0, 1fr);
    column-gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
  }
  .page-faq .faq-index {
    position: sticky;
    top: 96px;
  }
  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 0.2rem;
    overflow: visible;
    padding: 0;
  }
  .page-faq .faq-index__link {
    justify-content: flex-start;
    white-space: normal;
    border-color: transparent;
    border-left: 2px solid var(--faq-rule);
    border-radius: 0;
    background: transparent;
    padding: 0.5rem 0.75rem;
    line-height: 1.5;
  }
  .page-faq .faq-index__num {
    flex: 0 0 auto;
  }
}

/* ── 问题分组 ───────────────────────── */
.page-faq .faq-group {
  scroll-margin-top: 112px;
  margin-bottom: clamp(2.5rem, 7vw, 4.25rem);
}

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

.page-faq .faq-group__title {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 3.4vw, 1.8rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--white);
  margin: 0 0 0.7rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-group__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--coral);
}

.page-faq .faq-group__lead {
  max-width: 62ch;
  margin: 0 0 clamp(1.25rem, 3vw, 1.85rem);
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ── 三步排查 ───────────────────────── */
.page-faq .faq-steps {
  display: grid;
  gap: 1px;
  margin: 0 0 clamp(1.5rem, 4vw, 2.25rem);
  padding: 0;
  list-style: none;
  background: var(--faq-rule);
  border: 1px solid var(--faq-rule);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-steps__item {
  position: relative;
  padding: 1.25rem 1.2rem 1.5rem 1.4rem;
  background: linear-gradient(160deg, var(--panel), var(--panel-deep));
}

.page-faq .faq-steps__item::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(0, 229, 200, 0));
}

.page-faq .faq-steps__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--coral);
  margin-bottom: 0.6rem;
}

.page-faq .faq-steps__title {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--white);
}

.page-faq .faq-steps__item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--muted);
}

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

/* ── 媒体图框 ───────────────────────── */
.page-faq .media {
  margin: 0 0 clamp(1.5rem, 4vw, 2.25rem);
}

.page-faq .media__frame {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background:
    linear-gradient(160deg, rgba(0, 229, 200, 0.09), rgba(4, 18, 31, 0.92)),
    var(--panel-deep);
}

.page-faq .media--tall .media__frame {
  max-width: 440px;
}

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

.page-faq .media__caption {
  margin-top: 0.6rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--muted);
}

/* ── 问答组 ─────────────────────────── */
.page-faq .accordion {
  border-top: 1px solid var(--faq-rule);
}

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

.page-faq .accordion__item[open] {
  background: linear-gradient(180deg, rgba(0, 229, 200, 0.055), rgba(0, 229, 200, 0) 74%);
}

.page-faq .accordion__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin: 0;
  padding: 1rem 0.15rem;
  cursor: pointer;
  list-style: none;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--white);
  transition: color 0.2s var(--ease);
}

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

.page-faq .accordion__q:hover {
  color: var(--cyan-bright);
}

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

.page-faq .accordion__icon {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
}

.page-faq .accordion__icon::before,
.page-faq .accordion__icon::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.page-faq .accordion__icon::before {
  top: 7px;
  left: 0;
  width: 16px;
  height: 2px;
}

.page-faq .accordion__icon::after {
  top: 0;
  left: 7px;
  width: 2px;
  height: 16px;
}

.page-faq .accordion__item[open] .accordion__icon::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .accordion__a {
  max-width: 68ch;
  padding: 0 0.15rem 1.25rem;
}

.page-faq .accordion__a p {
  margin: 0 0 0.8rem;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--muted);
}

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

.page-faq .accordion__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 200, 0.4);
}

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

/* 要点列表 */
.page-faq .faq-points {
  counter-reset: faqpt;
  display: grid;
  gap: 0.6rem;
  margin: 0.85rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-points li {
  counter-increment: faqpt;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.7rem;
  align-items: baseline;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--white);
}

.page-faq .faq-points li::before {
  content: counter(faqpt, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--coral);
}

/* ── 联系方式 ───────────────────────── */
.page-faq .faq-contact {
  display: grid;
  gap: 1px;
  margin: 0 0 clamp(1.5rem, 4vw, 2.25rem);
  padding: 0;
  list-style: none;
  background: var(--faq-rule);
  border: 1px solid var(--faq-rule);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-contact li {
  padding: 1.1rem 1.2rem;
  background: linear-gradient(150deg, var(--panel), var(--panel-deep));
}

.page-faq .faq-contact__k {
  display: block;
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.13em;
  color: var(--muted);
}

.page-faq .faq-contact__v {
  display: block;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--white);
  word-break: break-word;
}

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

/* ── 收束提示 ───────────────────────── */
.page-faq .faq-note {
  display: grid;
  gap: 1rem;
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
  padding: 1.2rem 1.3rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--coral);
  border-radius: var(--radius);
  background: linear-gradient(120deg, rgba(255, 107, 69, 0.09), rgba(10, 33, 54, 0.72));
}

.page-faq .faq-note p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--white);
}

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

@media (min-width: 720px) {
  .page-faq .faq-note {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
  .page-faq .faq-note .btn {
    justify-self: end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .accordion__icon::before,
  .page-faq .accordion__icon::after,
  .page-faq .accordion__q,
  .page-faq .faq-index__link {
    transition: none;
  }
}