.page-faq {
  --faq-soft: rgba(14, 27, 46, 0.62);
  --faq-line: var(--frame);
  display: block;
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  padding: clamp(16px, 3vw, 28px) 0 0;
}

.page-faq .faq-hero__frame {
  position: relative;
  border: 1px solid var(--faq-line);
  padding: clamp(22px, 4vw, 48px) clamp(18px, 3.4vw, 44px);
  background:
    radial-gradient(140% 120% at 0% 0%, rgba(44, 224, 200, 0.13), transparent 58%),
    linear-gradient(160deg, var(--field) 0%, rgba(6, 13, 24, 0.42) 100%);
}

.page-faq .faq-hero__frame::before,
.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  width: 28px;
  height: 28px;
  border: 2px solid var(--cyan);
  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-left: 0;
  border-top: 0;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}

.page-faq .faq-hero__title {
  margin: 14px 0 16px;
  margin-left: -0.05em;
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(2rem, 6.2vw, 3.5rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 34em;
  font-size: clamp(0.96rem, 1.4vw, 1.06rem);
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-hero__note {
  display: grid;
  gap: 6px;
  align-content: start;
  border-top: 1px solid var(--faq-line);
  padding: 14px 0 0;
}

.page-faq .faq-hero__note-line {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero__note-text {
  margin: 8px 0 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 横幅图 ---------- */
.page-faq .faq-banner {
  margin: clamp(20px, 3vw, 34px) 0 0;
}

.page-faq .faq-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1400 / 640;
  object-fit: cover;
  border: 1px solid var(--faq-line);
}

.page-faq .faq-banner__cap {
  margin-top: 10px;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--muted);
}

/* ---------- 分类索引标签 ---------- */
.page-faq .faq-tabs {
  position: sticky;
  top: var(--topbar-h);
  z-index: 6;
  margin-top: clamp(24px, 4vw, 46px);
  border-top: 1px solid var(--faq-line);
  border-bottom: 1px solid var(--faq-line);
  background: rgba(6, 13, 24, 0.92);
  backdrop-filter: blur(12px);
}

.page-faq .faq-tabs__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 10px 0;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

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

.page-faq .faq-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--faq-line);
  background: var(--faq-soft);
  color: var(--ink);
  font-size: 0.86rem;
  text-decoration: none;
  white-space: nowrap;
  clip-path: polygon(9px 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%, 0 9px);
  transition: background 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-faq .faq-tab:hover {
  border-color: var(--cyan);
}

.page-faq .faq-tab[aria-current="true"] {
  background: var(--orange);
  border-color: var(--orange);
  color: #07101d;
  font-weight: 700;
}

.page-faq .faq-tab__no {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  opacity: 0.85;
}

/* ---------- 分组 ---------- */
.page-faq .faq-group:nth-of-type(odd) {
  padding-top: clamp(56px, 9vw, 118px);
}

.page-faq .faq-group:nth-of-type(even) {
  padding-top: clamp(40px, 6vw, 78px);
}

.page-faq .faq-group.scroll-margin,
.page-faq .faq-group {
  scroll-margin-top: calc(var(--topbar-h) + 64px);
}

.page-faq .faq-group__head {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-faq .faq-group__title {
  margin: 12px 0 10px;
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.4vw, 2.15rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-group__lead {
  margin: 0;
  max-width: 34em;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-figure {
  margin: 0 0 clamp(20px, 3vw, 30px);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--faq-line);
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--muted);
}

/* ---------- 问答列表 ---------- */
.page-faq .faq-list {
  position: relative;
  display: grid;
  gap: 2px;
  border-left: 1px solid rgba(255, 106, 43, 0.5);
  padding-left: clamp(14px, 2.4vw, 26px);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-line);
  background: linear-gradient(90deg, var(--faq-soft), rgba(14, 27, 46, 0));
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 12px;
  padding: 16px 10px 16px 0;
  cursor: pointer;
  list-style: none;
  color: var(--ink);
  transition: color 0.25s var(--ease);
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__q:hover .faq-item__text {
  color: var(--cyan);
}

.page-faq .faq-item__no {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  transition: color 0.3s var(--ease);
}

.page-faq .faq-item[open] .faq-item__no {
  color: var(--cyan);
}

.page-faq .faq-item__text {
  font-size: clamp(0.98rem, 1.4vw, 1.06rem);
  font-weight: 600;
  line-height: 1.55;
  transition: color 0.25s var(--ease);
}

.page-faq .faq-item__sign {
  position: relative;
  align-self: center;
  width: 14px;
  height: 14px;
  flex: none;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  background: var(--orange);
  transform: translateY(-50%);
  transition: transform 0.3s var(--ease), background 0.3s var(--ease);
}

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

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

.page-faq .faq-item[open] .faq-item__sign::before,
.page-faq .faq-item[open] .faq-item__sign::after {
  background: var(--cyan);
}

.page-faq .faq-item__body {
  padding: 0 clamp(10px, 2vw, 22px) 20px 0;
  max-width: 34em;
  animation: faq-drop 0.32s var(--ease);
}

.page-faq .faq-item__body p {
  margin: 0 0 10px;
  font-size: 0.95rem;
  line-height: 1.8;
  color: #c9d6e6;
}

.page-faq .faq-item__more {
  margin-top: 4px;
}

.page-faq .faq-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(44, 224, 200, 0.4);
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
  text-decoration: none;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-faq .faq-link::after {
  content: "→";
}

.page-faq .faq-link:hover {
  color: var(--orange);
  border-color: var(--orange);
}

@keyframes faq-drop {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 收尾 ---------- */
.page-faq .faq-cta {
  padding: clamp(56px, 9vw, 112px) 0 clamp(40px, 6vw, 80px);
}

.page-faq .faq-cta__inner {
  position: relative;
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--orange);
  background: linear-gradient(120deg, rgba(255, 106, 43, 0.12), rgba(14, 27, 46, 0.62) 58%);
  padding: clamp(22px, 4vw, 44px);
}

.page-faq .faq-cta__title {
  margin: 12px 0 12px;
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(1.35rem, 3vw, 1.95rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-cta__text {
  margin: 0 0 22px;
  max-width: 34em;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--muted);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 3fr);
    align-items: start;
  }

  .page-faq .faq-hero__note {
    border-top: 0;
    border-left: 1px solid var(--faq-line);
    padding: 4px 0 4px 18px;
  }

  .page-faq .faq-group__head {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 4fr);
    column-gap: clamp(20px, 3vw, 46px);
    align-items: end;
  }

  .page-faq .faq-group__head .section__label {
    grid-column: 1 / -1;
  }

  .page-faq .faq-group__title {
    margin-bottom: 0;
  }

  .page-faq .faq-figure {
    max-width: 72%;
    margin-left: -0.6%;
    margin-bottom: clamp(24px, 3vw, 34px);
  }
}

@media (max-width: 640px) {
  .page-faq .faq-hero__frame::before,
  .page-faq .faq-hero__frame::after {
    width: 18px;
    height: 18px;
  }

  .page-faq .faq-tab {
    padding: 8px 12px;
    font-size: 0.82rem;
  }

  .page-faq .faq-item__q {
    gap: 8px;
    padding-right: 4px;
  }

  .page-faq .faq-list {
    padding-left: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__body {
    animation: none;
  }

  .page-faq .faq-tab,
  .page-faq .faq-item__q,
  .page-faq .faq-item__text,
  .page-faq .faq-item__no,
  .page-faq .faq-item__sign::before,
  .page-faq .faq-item__sign::after,
  .page-faq .faq-link {
    transition: none;
  }
}