.page-faq {
  --faq-narrow: 760px;
  --faq-wide: 1010px;
  position: relative;
  isolation: isolate;
  overflow-x: clip;
  color: var(--mist);
  font-family: var(--font-body);
  padding-bottom: clamp(56px, 9vw, 112px);
}

.page-faq::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: clamp(420px, 58vw, 680px);
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(58% 66% at 86% 4%, rgba(91, 55, 183, 0.40), transparent 64%),
    radial-gradient(44% 56% at 2% 0%, rgba(34, 227, 255, 0.12), transparent 66%);
}

/* ---------- 容器 ---------- */
.page-faq .faq-shell {
  width: 100%;
  max-width: var(--faq-narrow);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-faq .faq-shell--wide {
  max-width: var(--faq-wide);
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: clamp(20px, 4vw, 36px);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .faq-crumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

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

.page-faq .faq-crumb span[aria-current="page"] {
  color: var(--steel);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(22px, 4vw, 42px);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(26px, 5vw, 44px);
  align-items: start;
}

.page-faq .faq-index {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .faq-index-num {
  display: inline-grid;
  place-items: center;
  min-width: 32px;
  height: 20px;
  padding-inline: 6px;
  border: 1px solid var(--line);
  background: rgba(34, 227, 255, 0.06);
  color: var(--cyan);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.page-faq .faq-hero h1 {
  margin: 0 0 clamp(14px, 2.4vw, 22px);
  font-family: var(--font-display);
  font-size: clamp(32px, 7.4vw, 58px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-faq .faq-lead {
  margin: 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.9vw, 17px);
  line-height: 1.78;
  color: var(--steel);
}

.page-faq .faq-hint {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin: clamp(20px, 3.4vw, 28px) 0 0;
  padding: 13px 18px;
  border: 1px solid var(--line);
  background: linear-gradient(100deg, rgba(13, 18, 32, 0.94), rgba(58, 34, 112, 0.26));
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.62;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
}

.page-faq .faq-hint svg {
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: 3px;
  color: var(--cyan);
}

.page-faq .faq-hero-art {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: 0 18px 44px rgba(5, 7, 12, 0.55);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 40px), calc(100% - 40px) 100%, 0 100%);
}

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

.page-faq .faq-hero-art::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 46%;
  pointer-events: none;
  background: linear-gradient(to top, rgba(5, 7, 12, 0.88), transparent);
}

.page-faq .faq-art-label {
  position: absolute;
  left: 16px;
  bottom: 14px;
  z-index: 1;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--lime);
}

/* ---------- 主题标签条 ---------- */
.page-faq .faq-tabs-label {
  margin: clamp(30px, 5vw, 50px) 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .faq-tabs {
  display: flex;
  gap: 10px;
  padding-bottom: 12px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}

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

.page-faq .faq-tabs::-webkit-scrollbar-thumb {
  background: var(--line);
}

.page-faq .faq-tab {
  flex: none;
  padding: 9px 18px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: rgba(13, 18, 32, 0.72);
  color: var(--steel);
  font-size: 13.5px;
  letter-spacing: 0.02em;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease),
    background-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-faq .faq-tab:hover,
.page-faq .faq-tab:focus-visible {
  color: var(--void);
  background: var(--cyan);
  border-color: var(--cyan);
  transform: translateY(-1px);
}

/* ---------- 章节 ---------- */
.page-faq .faq-sec {
  padding-top: clamp(40px, 7vw, 74px);
  scroll-margin-top: 96px;
}

.page-faq .faq-sec-head {
  margin-bottom: clamp(18px, 3vw, 26px);
}

.page-faq .faq-sec-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(23px, 4.2vw, 32px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--mist);
}

.page-faq .faq-sec-lead {
  margin: 0;
  max-width: 54ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-sec--alert .faq-index-num {
  color: var(--orange);
  border-color: rgba(255, 106, 43, 0.45);
  background: rgba(255, 106, 43, 0.10);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 2px 18px 0;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: clamp(15.5px, 2vw, 17.5px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--mist);
  transition: color 0.18s var(--ease);
}

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

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

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-q-icon {
  flex: none;
  position: relative;
  margin-left: auto;
  margin-top: 4px;
  width: 16px;
  height: 16px;
  border: 1px solid var(--line);
  border-radius: 50%;
  transition: border-color 0.18s var(--ease);
}

.page-faq .faq-q-icon::before,
.page-faq .faq-q-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--muted);
  transform: translate(-50%, -50%);
  transition: background-color 0.18s var(--ease), opacity 0.18s var(--ease);
}

.page-faq .faq-q-icon::before {
  width: 7px;
  height: 1px;
}

.page-faq .faq-q-icon::after {
  width: 1px;
  height: 7px;
}

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

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

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

.page-faq .faq-item[open] .faq-q-icon::after {
  opacity: 0;
}

.page-faq .faq-a {
  margin-left: 2px;
  padding: 0 2px 20px 18px;
  border-left: 2px solid var(--line);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--steel);
  transition: border-color 0.2s var(--ease);
}

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

.page-faq .faq-a p {
  margin: 0;
  max-width: 60ch;
}

.page-faq .faq-a a {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: rgba(34, 227, 255, 0.45);
  transition: text-decoration-color 0.18s var(--ease);
}

.page-faq .faq-a a:hover {
  text-decoration-color: var(--cyan);
}

.page-faq .faq-mono {
  font-family: var(--font-mono);
  font-size: 1.12em;
  letter-spacing: 0.01em;
  color: var(--lime);
}

/* ---------- 反馈示意图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 clamp(20px, 3vw, 28px);
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

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

.page-faq .faq-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

/* ---------- 结尾行动区 ---------- */
.page-faq .faq-cta {
  margin-top: clamp(22px, 4vw, 32px);
  padding: clamp(22px, 4.6vw, 36px);
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(58, 34, 112, 0.44), rgba(13, 18, 32, 0.94) 58%),
    var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 36px), calc(100% - 36px) 100%, 0 100%);
}

.page-faq .faq-checklist {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq .faq-checklist li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.68;
  color: var(--steel);
}

.page-faq .faq-checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 6px;
  background: var(--lime);
}

.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 26px);
}

.page-faq .faq-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border: 1px solid transparent;
  border-radius: var(--pill);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease),
    color 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-faq .faq-btn:hover {
  transform: translateY(-1px);
}

.page-faq .faq-btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-btn--solid {
  background: var(--orange);
  color: #120804;
}

.page-faq .faq-btn--solid:hover {
  background: #ff8347;
}

.page-faq .faq-btn--ghost {
  background: rgba(34, 227, 255, 0.07);
  border-color: rgba(34, 227, 255, 0.55);
  color: var(--cyan);
}

.page-faq .faq-btn--ghost:hover {
  background: rgba(34, 227, 255, 0.18);
  border-color: var(--cyan);
}

.page-faq .faq-cta-note {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-cta-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 227, 255, 0.4);
  transition: border-color 0.18s var(--ease);
}

.page-faq .faq-cta-note a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 880px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    gap: clamp(32px, 4vw, 58px);
  }

  .page-faq .faq-hero-copy {
    padding-top: 6px;
  }

  .page-faq .faq-checklist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 28px;
  }
}

@media (max-width: 559px) {
  .page-faq .faq-tab {
    padding: 8px 15px;
    font-size: 13px;
  }

  .page-faq .faq-hint {
    padding: 12px 14px;
  }

  .page-faq .faq-a {
    padding-left: 14px;
  }

  .page-faq .faq-btn {
    width: 100%;
  }
}