.page-faq {
  --faq-sticky-top: 92px;
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(24px, 4vw, 48px) 0 clamp(36px, 5vw, 68px);
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -30% -15% auto -15%;
  height: 460px;
  background: radial-gradient(56% 100% at 26% 0%, rgba(75, 63, 143, 0.42), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-hero .shell {
  position: relative;
  z-index: 1;
}

.page-faq .breadcrumb {
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-faq .faq-hero__frame {
  position: relative;
  padding: clamp(20px, 3.4vw, 40px);
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(75, 63, 143, 0.22), transparent 62%),
    var(--glass);
  backdrop-filter: blur(6px);
}

.page-faq .faq-hero__frame::before,
.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border: 1px solid var(--lime);
  pointer-events: none;
}

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

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

.page-faq .faq-hero__frame .eyebrow {
  margin: 0 0 14px;
}

.page-faq .faq-hero__title {
  margin: 0;
  max-width: 22ch;
  font-family: var(--font-head);
  font-size: clamp(32px, 6.4vw, 68px);
  line-height: 1.06;
  font-weight: 800;
  letter-spacing: -0.02em;
  transform: skewX(-0.6deg);
  color: var(--ink);
}

.page-faq .faq-hero .lede {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 58ch;
  color: var(--ink-soft);
}

/* ============ 检索演示 ============ */
.page-faq .faq-search {
  margin-top: clamp(22px, 3.6vw, 36px);
  border: 1px solid var(--line-strong);
  background: var(--glass-strong);
  overflow: hidden;
}

.page-faq .faq-search__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  padding: 14px clamp(14px, 2.2vw, 24px);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(90deg, rgba(198, 255, 61, 0.09), transparent 62%);
}

.page-faq .faq-search__prompt {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--lime);
  text-transform: uppercase;
}

.page-faq .faq-search__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-search__tags .tab {
  font-family: var(--font-body);
  font-size: 14px;
  padding: 6px 14px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink-soft);
  border-radius: var(--radius);
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .faq-search__tags .tab:hover {
  color: var(--ink);
  border-color: var(--lime-line);
}

.page-faq .faq-search__tags .tab.is-active,
.page-faq .faq-search__tags .tab[aria-selected="true"] {
  color: var(--pitch);
  background: var(--lime);
  border-color: var(--lime);
  font-weight: 600;
}

.page-faq .faq-search__panels {
  padding: clamp(16px, 2.4vw, 26px) clamp(14px, 2.2vw, 24px);
}

.page-faq .faq-search__panels .tab-panel {
  display: none;
}

.page-faq .faq-search__panels .tab-panel.is-active {
  display: block;
}

.page-faq .faq-search__panels p {
  margin: 0;
  max-width: 64ch;
  color: var(--ink-soft);
  line-height: 1.75;
}

.page-faq .faq-search__meta {
  margin-top: 12px !important;
  font-size: 13px;
  color: var(--ink-dim);
}

.page-faq .faq-search__meta .num {
  color: var(--lime);
  font-size: 16px;
  font-weight: 700;
}

/* ============ 快速开始 ============ */
.page-faq .faq-steps {
  list-style: none;
  margin: clamp(28px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2.6vw, 30px);
  padding: clamp(18px, 2.6vw, 30px) clamp(4px, 1.4vw, 16px);
  background: var(--pitch);
}

.page-faq .faq-step__num {
  font-size: clamp(26px, 4.2vw, 44px);
  line-height: 1;
  font-weight: 700;
  color: var(--lime);
  opacity: 0.9;
}

.page-faq .faq-step__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 700;
  color: var(--ink);
}

.page-faq .faq-step__body p {
  margin: 0;
  max-width: 66ch;
  color: var(--ink-soft);
  line-height: 1.75;
}

/* ============ 主体两栏 ============ */
.page-faq .faq-body-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 56px);
  margin-top: clamp(28px, 4vw, 44px);
}

.page-faq .faq-main {
  display: grid;
  gap: clamp(36px, 5vw, 60px);
  min-width: 0;
}

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

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--lime-line);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(21px, 2.8vw, 28px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-group__intro {
  margin: 20px 0 0;
  max-width: 66ch;
  color: var(--ink-soft);
  line-height: 1.8;
}

.page-faq .faq-figure {
  margin: 24px 0 0;
  aspect-ratio: 3 / 2;
  border: 1px solid var(--line);
}

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

/* ============ FAQ 折叠 ============ */
.page-faq .faq-qa {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-qa summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 18px 44px 18px 0;
  font-size: clamp(15px, 1.7vw, 17px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
  transition: color 0.18s var(--ease);
}

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

.page-faq .faq-qa summary:hover {
  color: var(--lime);
}

.page-faq .faq-qa summary::after {
  content: "+";
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--lime);
  transition: transform 0.2s var(--ease);
}

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

.page-faq .faq-qa__answer {
  padding: 0 0 20px;
}

.page-faq .faq-qa__answer p {
  margin: 0;
  max-width: 70ch;
  color: var(--ink-soft);
  line-height: 1.8;
  border-left: 3px solid var(--lime-line);
  padding-left: 16px;
}

/* ============ 侧栏粘性下载区 ============ */
.page-faq .faq-side {
  min-width: 0;
}

.page-faq .faq-side__sticky {
  display: grid;
  gap: 16px;
}

.page-faq .faq-download-panel {
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--charcoal);
  border: 1px solid var(--line);
  border-left: 3px solid var(--lime);
}

.page-faq .faq-download-panel .plaque__label {
  margin: 0;
}

.page-faq .faq-download-panel h3 {
  margin: 10px 0 18px;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
}

.page-faq .faq-download-panel__list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
}

.page-faq .faq-download-panel__list li {
  background: var(--charcoal);
}

.page-faq .faq-download-panel__list a {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  padding: 12px 2px;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.18s var(--ease);
}

.page-faq .faq-download-panel__list a:hover {
  color: var(--lime);
}

.page-faq .faq-download-panel__list .mono {
  font-size: 12px;
  color: var(--mist);
}

.page-faq .faq-download-panel .btn {
  width: 100%;
  justify-content: center;
  text-align: center;
}

.page-faq .faq-side__notice {
  font-size: 14px;
}

.page-faq .faq-side__notice p {
  margin: 0;
  line-height: 1.72;
}

/* ============ 下载与文档 ============ */
.page-faq .faq-docs {
  margin-top: clamp(28px, 4vw, 44px);
  display: grid;
  gap: clamp(24px, 3.6vw, 40px);
}

.page-faq .faq-docs__figure {
  margin: 0;
  aspect-ratio: 3 / 2;
  border: 1px solid var(--line);
}

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

.page-faq .faq-docs__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-doc {
  background: var(--pitch);
  padding: clamp(20px, 2.8vw, 30px) clamp(4px, 1.4vw, 16px);
}

.page-faq .faq-doc__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.page-faq .faq-doc__meta .mono {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
}

.page-faq .faq-doc h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(18px, 2.2vw, 21px);
  font-weight: 700;
  color: var(--ink);
}

.page-faq .faq-doc p {
  margin: 0;
  max-width: 60ch;
  color: var(--ink-soft);
  line-height: 1.78;
  font-size: 15px;
}

/* ============ 联系支持 ============ */
.page-faq .faq-support {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  padding: clamp(24px, 3.6vw, 44px);
  background:
    linear-gradient(140deg, rgba(75, 63, 143, 0.28), transparent 58%),
    var(--glass-strong);
  border: 1px solid var(--line);
  border-left: 3px solid var(--amber);
}

.page-faq .faq-support .eyebrow {
  margin: 0 0 12px;
}

.page-faq .faq-support__title {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: clamp(24px, 3.6vw, 36px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-support__text {
  margin: 0 0 22px;
  max-width: 56ch;
  color: var(--ink-soft);
  line-height: 1.8;
}

.page-faq .faq-support__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-support__facts {
  margin: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-support__facts > div {
  background: var(--charcoal);
  padding: 14px 18px;
}

.page-faq .faq-support__facts dt {
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
  margin-bottom: 6px;
}

.page-faq .faq-support__facts dd {
  margin: 0;
  color: var(--ink);
  font-size: 15px;
  line-height: 1.6;
  word-break: break-word;
}

.page-faq .faq-support__facts dd.mono {
  color: var(--lime);
  font-size: 14px;
}

.page-faq .faq-support__foot {
  margin: clamp(22px, 3vw, 32px) 0 0;
  color: var(--ink-dim);
  font-size: 14px;
  line-height: 1.9;
}

.page-faq .faq-support__foot a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 224, 176, 0.35);
}

.page-faq .faq-support__foot a:hover {
  color: var(--lime);
  border-bottom-color: var(--lime-line);
}

/* ============ 响应式 ============ */
@media (min-width: 640px) {
  .page-faq .faq-docs__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-support__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-support__facts-wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-body-grid {
    grid-template-columns: minmax(0, 1.85fr) minmax(272px, 1fr);
    align-items: start;
  }

  .page-faq .faq-side__sticky {
    position: sticky;
    top: var(--faq-sticky-top);
  }

  .page-faq .faq-support {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-step {
    grid-template-columns: 96px minmax(0, 1fr);
  }

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

@media (max-width: 520px) {
  .page-faq .faq-hero__frame {
    padding: 18px 16px;
  }

  .page-faq .faq-step {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .page-faq .faq-search__bar {
    gap: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-qa summary,
  .page-faq .faq-qa summary::after,
  .page-faq .faq-search__tags .tab,
  .page-faq .faq-download-panel__list a {
    transition: none;
  }
}