.page-faq {
  position: relative;
  color: var(--sv-text-primary);
  background: var(--sv-deep-void);
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

/* ---------- 面包屑 ---------- */
.page-faq .sv-breadcrumb {
  padding-top: clamp(1rem, 3vw, 1.7rem);
  font-size: 0.8125rem;
  color: var(--sv-text-secondary);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: clip;
  padding-block: clamp(1.8rem, 5vw, 3.6rem) clamp(2rem, 5vw, 3.4rem);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -22%;
  width: min(60rem, 118%);
  height: 150%;
  z-index: 0;
  pointer-events: none;
  border-radius: 42% 58% 46% 54% / 56% 44% 58% 42%;
  background: linear-gradient(118deg, rgba(124, 92, 255, 0.26), rgba(53, 224, 212, 0.14) 52%, rgba(5, 7, 14, 0) 76%);
  transform: rotate(-14deg);
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.7rem, 4vw, 3rem);
  align-items: center;
}

.page-faq .faq-hero__copy .sv-h1 {
  margin: 0.5rem 0 0.9rem;
  letter-spacing: 0.08em;
}

.page-faq .faq-hero__copy .sv-lede {
  max-width: 34em;
  color: var(--sv-text-secondary);
}

.page-faq .faq-hero__facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 1.1rem;
  margin: 1.4rem 0 0;
  padding: 0;
  font-size: 0.8125rem;
  color: var(--sv-text-secondary);
}

.page-faq .faq-hero__facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
}

.page-faq .faq-hero__facts .sv-mono {
  font-size: 1rem;
  color: var(--sv-cyan);
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--sv-grid-line);
  border-radius: var(--sv-radius);
  background: var(--sv-cabin-black);
  box-shadow: var(--sv-shadow);
  overflow: hidden;
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

@media (min-width: 62rem) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(2rem, 5vw, 4rem);
  }
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.6rem, 4vw, 2.6rem);
  align-items: start;
}

@media (min-width: 56rem) {
  .page-faq .faq-body__grid {
    grid-template-columns: minmax(11rem, 13rem) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4rem);
  }
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  border: 1px solid var(--sv-grid-line);
  border-radius: var(--sv-radius);
  background: var(--sv-panel-slate);
  padding: 1.1rem 1rem 1.2rem;
}

.page-faq .faq-index .sv-eyebrow {
  margin-bottom: 0.9rem;
}

.page-faq .faq-index__group + .faq-index__group {
  margin-top: 0.9rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--sv-grid-line);
}

.page-faq .faq-index__grouplabel {
  margin: 0 0 0.45rem;
  font-family: var(--sv-font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  color: var(--sv-mono-muted);
}

.page-faq .faq-index__list {
  list-style: none;
  display: grid;
  gap: 0.1rem;
  margin: 0;
  padding: 0;
}

.page-faq .faq-index__list a {
  display: grid;
  grid-template-columns: 1.9rem minmax(0, 1fr);
  gap: 0.45rem;
  align-items: baseline;
  padding: 0.32rem 0.4rem;
  border-radius: var(--sv-radius-xs);
  color: var(--sv-text-secondary);
  font-size: 0.8125rem;
  line-height: 1.55;
  text-decoration: none;
  transition: background-color 0.18s var(--sv-ease), color 0.18s var(--sv-ease);
}

.page-faq .faq-index__list a .sv-mono {
  font-size: 0.75rem;
  color: var(--sv-violet);
}

.page-faq .faq-index__list a:hover {
  background: rgba(53, 224, 212, 0.1);
  color: var(--sv-text-primary);
}

.page-faq .faq-index__list a:hover .sv-mono {
  color: var(--sv-cyan);
}

@media (min-width: 56rem) {
  .page-faq .faq-index {
    position: sticky;
    top: clamp(5rem, 12vh, 7rem);
    align-self: start;
  }
}

/* ---------- 口径提醒 ---------- */
.page-faq .faq-note {
  border-left: 3px solid var(--sv-gold);
  border-radius: 0 var(--sv-radius-sm) var(--sv-radius-sm) 0;
  background: linear-gradient(90deg, rgba(255, 196, 107, 0.12), rgba(19, 26, 46, 0.5) 62%);
  padding: 0.95rem 1.1rem;
  margin-bottom: clamp(1.8rem, 4vw, 2.8rem);
}

.page-faq .faq-note__label {
  margin: 0 0 0.4rem;
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  color: var(--sv-gold);
}

.page-faq .faq-note p:last-child {
  margin: 0;
  max-width: 40em;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--sv-text-primary);
}

/* ---------- 章节 ---------- */
.page-faq .faq-chapter + .faq-chapter {
  margin-top: clamp(2.4rem, 6vw, 3.8rem);
}

.page-faq .faq-chapter__head {
  border-top: 1px solid var(--sv-grid-line);
  padding-top: 1.1rem;
  margin-bottom: 1.4rem;
}

.page-faq .faq-chapter__head .sv-h2 {
  margin: 0.35rem 0 0.7rem;
  letter-spacing: 0.02em;
}

.page-faq .faq-chapter__head .sv-prose {
  margin: 0;
  max-width: 40em;
  color: var(--sv-text-secondary);
  font-size: 0.9375rem;
}

/* ---------- 示意图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 1.4rem;
  border: 1px solid var(--sv-grid-line);
  border-radius: var(--sv-radius);
  background: var(--sv-cabin-black);
  overflow: hidden;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  padding: 0.7rem 1rem 0.85rem;
  font-family: var(--sv-font-mono);
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--sv-text-secondary);
  border-top: 1px solid var(--sv-grid-line);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-accordion {
  display: block;
}

.page-faq .faq-item {
  position: relative;
  border: 1px solid var(--sv-grid-line);
  border-radius: var(--sv-radius);
  background: var(--sv-panel-slate);
  overflow: hidden;
  transition: border-color 0.2s var(--sv-ease), background-color 0.2s var(--sv-ease);
}

.page-faq .faq-item + .faq-item {
  margin-top: 0.6rem;
}

.page-faq .faq-item:has(.sv-accordion__trigger[aria-expanded="true"]) {
  border-color: rgba(53, 224, 212, 0.45);
  background: var(--sv-cabin-black);
}

.page-faq .faq-item__q {
  margin: 0;
  font: inherit;
}

.page-faq .faq-item .sv-accordion__trigger {
  position: relative;
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr) 1.5rem;
  align-items: center;
  gap: 0.4rem;
  width: 100%;
  min-height: 44px;
  padding: 0.9rem 1.1rem;
  border: 0;
  background: none;
  color: var(--sv-text-primary);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-faq .faq-item .sv-accordion__trigger::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 3px;
  height: 0;
  border-radius: var(--sv-pill);
  background: var(--sv-cyan);
  transform: translateY(-50%);
  transition: height 0.2s var(--sv-ease);
}

.page-faq .faq-item .sv-accordion__trigger[aria-expanded="true"]::before {
  height: 62%;
}

.page-faq .faq-item__num {
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--sv-cyan);
}

.page-faq .faq-item__label {
  font-family: var(--sv-font-head);
  font-weight: 600;
  font-size: clamp(0.95rem, 1.7vw, 1.0625rem);
  line-height: 1.5;
}

.page-faq .faq-item__chev {
  justify-self: end;
  width: 0.55rem;
  height: 0.55rem;
  border-right: 1.5px solid var(--sv-text-secondary);
  border-bottom: 1.5px solid var(--sv-text-secondary);
  transform: rotate(45deg) translate(-1px, -1px);
  transition: transform 0.2s var(--sv-ease), border-color 0.2s var(--sv-ease);
}

.page-faq .sv-accordion__trigger[aria-expanded="true"] .faq-item__chev {
  border-color: var(--sv-cyan);
  transform: rotate(-135deg) translate(-1px, -1px);
}

.page-faq .faq-item .sv-accordion__panel {
  padding: 0 1.1rem 1.15rem 3.9rem;
  color: var(--sv-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.78;
}

.page-faq .faq-item .sv-accordion__panel p {
  margin: 0 0 0.55rem;
  max-width: 42em;
}

.page-faq .faq-item .sv-accordion__panel p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-item .sv-accordion__panel a {
  color: var(--sv-cyan);
  text-underline-offset: 0.25em;
}

.page-faq .faq-item:has(.sv-accordion__trigger[aria-expanded="false"]) .sv-accordion__panel {
  display: none;
}

@media (max-width: 40rem) {
  .page-faq .faq-item .sv-accordion__panel {
    padding-left: 1.1rem;
  }
  .page-faq .faq-item .sv-accordion__trigger {
    grid-template-columns: 1.9rem minmax(0, 1fr) 1.2rem;
    gap: 0.35rem;
    padding: 0.85rem 0.9rem;
  }
}

/* ---------- 继续查阅 ---------- */
.page-faq .faq-next {
  margin-top: clamp(2.4rem, 6vw, 3.6rem);
  border-top: 1px solid var(--sv-grid-line);
  padding-top: 1.3rem;
}

.page-faq .faq-next .sv-h3 {
  margin: 0 0 1rem;
  letter-spacing: 0.02em;
}

.page-faq .faq-next__list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
}

.page-faq .faq-next__list a {
  display: grid;
  grid-template-columns: 2.1rem minmax(0, 1fr);
  align-items: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.7rem 0.95rem;
  border: 1px solid var(--sv-grid-line);
  border-radius: var(--sv-pill);
  background: var(--sv-cabin-black);
  color: var(--sv-text-primary);
  font-size: 0.9375rem;
  text-decoration: none;
  transition: border-color 0.2s var(--sv-ease), background-color 0.2s var(--sv-ease);
}

.page-faq .faq-next__list a .sv-mono {
  font-size: 0.75rem;
  color: var(--sv-violet);
}

.page-faq .faq-next__list a:hover {
  border-color: var(--sv-cyan);
  background: var(--sv-panel-slate);
}

@media (min-width: 40rem) {
  .page-faq .faq-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 64rem) {
  .page-faq .faq-next__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 动效退让 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero::before {
    transform: none;
  }
  .page-faq .faq-index__list a,
  .page-faq .faq-item,
  .page-faq .faq-item .sv-accordion__trigger::before,
  .page-faq .faq-item__chev,
  .page-faq .faq-next__list a {
    transition: none;
  }
}
</main>