.page-faq {
  --faq-pad: clamp(18px, 3vw, 30px);
  --faq-gap: clamp(18px, 2.6vw, 28px);
  --faq-step: clamp(28px, 4vw, 52px);
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumbs {
  padding-block: 18px 2px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(18px, 3.5vw, 44px) clamp(28px, 5vw, 64px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -30% -12% auto -12%;
  height: 460px;
  pointer-events: none;
  z-index: 0;
  background-image:
    radial-gradient(closest-side, rgba(0, 229, 255, 0.16), transparent 72%),
    radial-gradient(closest-side, rgba(168, 85, 247, 0.13), transparent 72%),
    radial-gradient(closest-side, rgba(255, 138, 0, 0.09), transparent 72%);
  background-repeat: no-repeat;
  background-size: 52% 100%, 42% 88%, 34% 70%;
  background-position: 6% 8%, 88% 32%, 58% 96%;
}

.page-faq .faq-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .faq-h1 {
  margin: 14px 0 0;
  font-size: clamp(29px, 5.4vw, 58px);
  line-height: 1.1;
  letter-spacing: -0.022em;
  font-weight: 800;
  max-width: 20ch;
  color: var(--text);
}

.page-faq .faq-hero-copy .lede {
  margin-top: 18px;
  max-width: 62ch;
  color: var(--text-dim);
}

.page-faq .faq-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 34px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-hero-stats .stat {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-faq .faq-hero-stats .stat-value {
  font-family: var(--font-en);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--cyan);
  line-height: 1;
}

.page-faq .faq-hero-stats .stat-label {
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--text-mute);
}

/* ---------- 快捷入口卡 ---------- */
.page-faq .faq-quick {
  border-radius: var(--radius);
  padding: var(--faq-pad);
  position: relative;
  overflow: hidden;
}

.page-faq .faq-quick::after {
  content: "";
  position: absolute;
  inset: auto auto -40% -30%;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(0, 229, 255, 0.18), transparent 72%);
  pointer-events: none;
}

.page-faq .faq-quick-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
  position: relative;
  z-index: 1;
}

.page-faq .faq-quick-list a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 13px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  color: var(--text);
  text-decoration: none;
  font-size: 14.5px;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.page-faq .faq-quick-list a:hover,
.page-faq .faq-quick-list a:focus-visible {
  border-color: var(--line-strong);
  background: rgba(0, 229, 255, 0.08);
  transform: translateX(3px);
}

.page-faq .faq-quick-list .mono {
  color: var(--purple);
  font-size: 12px;
  letter-spacing: 0.16em;
}

.page-faq .faq-quick-note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-mute);
  position: relative;
  z-index: 1;
}

.page-faq .faq-quick-note a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 138, 0, 0.42);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-core {
  padding-top: clamp(10px, 2vw, 22px);
}

.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 44px);
  align-items: start;
}

.page-faq .faq-index {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: rgba(11, 19, 26, 0.72);
  padding: 16px 14px;
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px;
  border-radius: 8px;
  border-left: 2px solid transparent;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.5;
  transition: color 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.page-faq .faq-index-list a:hover,
.page-faq .faq-index-list a:focus-visible {
  color: var(--text);
  background: rgba(0, 229, 255, 0.08);
  border-left-color: var(--cyan);
}

.page-faq .faq-index-list .mono {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  flex: none;
}

/* ---------- 筛选条 ---------- */
.page-faq .faq-filter {
  margin-bottom: clamp(22px, 3vw, 34px);
}

/* ---------- 问答块 ---------- */
.page-faq .faq-main {
  display: grid;
  gap: var(--faq-step);
  min-width: 0;
}

.page-faq .faq-block {
  scroll-margin-top: calc(var(--header-h) + 20px);
  padding-top: var(--faq-step);
  border-top: 1px solid var(--line);
  min-width: 0;
}

.page-faq .faq-block:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-block-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.page-faq .faq-block-idx {
  font-size: 12.5px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-faq .faq-block-title {
  margin: 0;
  font-size: clamp(21px, 2.7vw, 29px);
  font-weight: 700;
  letter-spacing: -0.012em;
  line-height: 1.25;
  color: var(--text);
}

.page-faq .faq-block-lede {
  margin: 12px 0 0;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--text-dim);
}

/* ---------- 图文错位 ---------- */
.page-faq .faq-cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin-top: 4px;
}

.page-faq .faq-figure {
  margin: 20px 0 0;
}

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

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

.page-faq .faq-figure .media-cap {
  display: block;
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-mute);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  margin-top: 18px;
  display: grid;
  gap: 10px;
}

.page-faq .faq-list--spaced {
  margin-top: 22px;
}

.page-faq .faq-item {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: linear-gradient(180deg, rgba(232, 246, 255, 0.05), rgba(232, 246, 255, 0.018));
  transition: border-color 0.2s ease, background 0.2s ease;
  overflow: hidden;
}

.page-faq .faq-item[open] {
  border-color: var(--line-strong);
  background: linear-gradient(180deg, rgba(0, 229, 255, 0.075), rgba(232, 246, 255, 0.018));
}

.page-faq .faq-item > summary {
  position: relative;
  display: block;
  padding: 15px 48px 15px 18px;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.62;
  color: var(--text);
  cursor: pointer;
  list-style: none;
}

.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item > summary::after {
  content: "";
  position: absolute;
  right: 19px;
  top: 50%;
  width: 10px;
  height: 10px;
  margin-top: -7px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform 0.22s ease, margin-top 0.22s ease;
}

.page-faq .faq-item[open] > summary::after {
  transform: rotate(-135deg);
  margin-top: -2px;
}

.page-faq .faq-answer {
  padding: 2px 18px 18px;
  margin-top: 2px;
  border-top: 1px dashed var(--line);
  font-size: 15px;
  line-height: 1.82;
  color: var(--text-dim);
}

.page-faq .faq-answer p {
  margin: 12px 0 0;
}

.page-faq .faq-answer p:first-child {
  margin-top: 14px;
}

.page-faq .faq-answer strong {
  color: var(--cyan);
  font-weight: 600;
}

.page-faq .faq-answer ol {
  list-style: none;
  counter-reset: faqstep;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-faq .faq-answer ol > li {
  counter-increment: faqstep;
  position: relative;
  padding-left: 38px;
  line-height: 1.75;
}

.page-faq .faq-answer ol > li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  line-height: 1.3;
  padding: 1px 5px;
  border-radius: 5px;
  color: var(--gold);
  border: 1px solid rgba(255, 138, 0, 0.42);
}

/* ---------- 设备标签矩阵 ---------- */
.page-faq .faq-tagmatrix {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 10px;
}

.page-faq .faq-tagmatrix li {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(232, 246, 255, 0.035);
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--text-dim);
}

.page-faq .faq-tagmatrix .mono {
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-faq .faq-tagmatrix .badge {
  align-self: flex-start;
  margin-top: 2px;
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-contact-card {
  margin-top: 20px;
  border-radius: var(--radius);
  padding: var(--faq-pad);
}

.page-faq .faq-contact-list {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-contact-list .contact-item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}

.page-faq .faq-contact-list .contact-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-contact-list .contact-key {
  flex: none;
  min-width: 76px;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--text-mute);
}

.page-faq .faq-contact-list .contact-value {
  font-family: var(--font-en);
  font-size: 15px;
  letter-spacing: 0.01em;
  color: var(--text);
  word-break: break-all;
}

.page-faq .faq-contact-note {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-faq .faq-contact-note a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 138, 0, 0.42);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero-stats {
    gap: 18px 44px;
  }

  .page-faq .faq-figure {
    margin-top: 22px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(280px, 0.68fr);
    gap: clamp(26px, 4vw, 58px);
  }

  .page-faq .faq-cols {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    gap: clamp(24px, 3vw, 36px);
    align-items: start;
  }

  .page-faq .faq-figure {
    margin-top: 18px;
  }

  .page-faq .faq-figure--wide {
    margin-top: 24px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: clamp(32px, 3.6vw, 56px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 18px);
  }
}

@media (max-width: 480px) {
  .page-faq .faq-hero::before {
    height: 320px;
    background-size: 78% 100%, 66% 84%, 54% 66%;
  }

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

  .page-faq .faq-contact-list .contact-key {
    min-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick-list a,
  .page-faq .faq-item,
  .page-faq .faq-item > summary::after,
  .page-faq .faq-index-list a {
    transition: none;
  }

  .page-faq .faq-quick-list a:hover,
  .page-faq .faq-quick-list a:focus-visible {
    transform: none;
  }
}