.page-faq {
  --faq-glass: rgba(255, 255, 255, 0.06);
  --faq-glass-strong: rgba(255, 255, 255, 0.12);
  --faq-edge: rgba(255, 255, 255, 0.09);
  --faq-edge-hot: rgba(39, 224, 208, 0.42);
  --notch-faq: 12px;
  background: var(--ink-900);
  padding-bottom: clamp(48px, 8vw, 96px);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(26px, 6vw, 68px) 0 clamp(22px, 4vw, 40px);
  background:
    radial-gradient(95% 120% at 6% 0%, rgba(39, 224, 208, 0.13), transparent 58%),
    radial-gradient(75% 115% at 100% 8%, rgba(226, 58, 46, 0.16), transparent 62%),
    var(--ink-900);
  border-bottom: 1px solid var(--grid-line);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 78%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 78%);
  pointer-events: none;
}

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

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 5.6vw, 3.3rem);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-faq .faq-hero__lead {
  margin: 16px 0 0;
  max-width: 36ch;
  color: var(--slate);
  font-size: 1rem;
  line-height: 1.85;
}

/* ---------- 快捷入口 ---------- */
.page-faq .faq-jump {
  padding: clamp(18px, 3.4vw, 32px) 0 0;
}

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

.page-faq .faq-jump__list::-webkit-scrollbar {
  height: 6px;
}

.page-faq .faq-jump__list::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.14);
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  padding: 10px 18px;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--slate);
  text-decoration: none;
  border: 1px solid var(--faq-edge);
  background: var(--faq-glass);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-chip:hover {
  color: var(--cyan);
  border-color: var(--faq-edge-hot);
  background: var(--faq-glass-strong);
  transform: translateY(-2px);
}

.page-faq .faq-chip:focus-visible {
  outline: none;
  color: var(--cyan);
  box-shadow: inset 0 0 0 2px var(--cyan);
}

/* ---------- 分组骨架 ---------- */
.page-faq .faq-body {
  padding-top: clamp(14px, 2.4vw, 24px);
}

.page-faq .faq-group {
  padding-top: clamp(32px, 5vw, 56px);
  scroll-margin-top: 76px;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--grid-line);
  transition: border-color var(--dur-slow) var(--ease);
}

.page-faq .faq-group__num {
  flex: 0 0 auto;
  font-size: clamp(1.45rem, 4vw, 2.2rem);
  font-weight: 600;
  line-height: 1;
  color: var(--maple);
  font-variant-numeric: tabular-nums;
  transition: color var(--dur-slow) var(--ease);
}

.page-faq .faq-group .section-title {
  margin: 0;
  padding-left: 14px;
  border-left: 3px solid var(--amber);
  font-family: var(--font-serif);
  font-size: clamp(1.15rem, 2.6vw, 1.5rem);
  font-weight: 600;
  line-height: 1.4;
  color: var(--mist);
}

.page-faq .faq-group:target .faq-group__num {
  color: var(--cyan);
}

.page-faq .faq-group:target .faq-group__head {
  border-bottom-color: var(--faq-edge-hot);
}

/* ---------- 问答条 ---------- */
.page-faq .qa {
  position: relative;
  margin-bottom: 10px;
  border: 1px solid var(--faq-edge);
  background: var(--faq-glass);
  clip-path: polygon(var(--notch-faq) 0, 100% 0, 100% calc(100% - var(--notch-faq)), calc(100% - var(--notch-faq)) 100%, 0 100%, 0 var(--notch-faq));
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .qa:hover,
.page-faq .qa:focus-within {
  background: var(--faq-glass-strong);
  border-color: var(--faq-edge-hot);
}

.page-faq .qa[open] {
  background: var(--faq-glass-strong);
  border-color: var(--faq-edge-hot);
}

.page-faq .qa[open]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--cyan);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-body);
  font-size: 0.98rem;
  font-weight: 500;
  line-height: 1.65;
  color: var(--mist);
}

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

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

.page-faq .qa__q:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--cyan);
}

.page-faq .qa__idx {
  flex: 0 0 auto;
  padding-top: 3px;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-faq .qa__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa__mark {
  flex: 0 0 auto;
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 5px;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--cyan);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .qa__mark::before {
  width: 14px;
  height: 2px;
  transform: translate(-50%, -50%);
}

.page-faq .qa__mark::after {
  width: 2px;
  height: 14px;
  transform: translate(-50%, -50%);
}

.page-faq .qa[open] .qa__mark::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-faq .qa__a {
  margin: 0 16px;
  padding: 14px 0 18px;
  border-top: 1px solid var(--grid-line);
  color: var(--slate);
  font-size: 0.94rem;
  line-height: 1.9;
}

.page-faq .qa__a p {
  margin: 0 0 10px;
  max-width: 62ch;
}

.page-faq .qa__a p:last-child {
  margin-bottom: 0;
}

.page-faq .qa__a a {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--dur) var(--ease);
}

.page-faq .qa__a a:hover,
.page-faq .qa__a a:focus-visible {
  color: var(--amber);
}

.page-faq .qa[open] .qa__a {
  animation: faq-answer-in var(--dur-slow) var(--ease) both;
}

@keyframes faq-answer-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 22px 0 6px;
  border: 1px solid var(--faq-edge);
  background: var(--ink-800);
  clip-path: polygon(var(--notch-faq) 0, 100% 0, 100% calc(100% - var(--notch-faq)), calc(100% - var(--notch-faq)) 100%, 0 100%, 0 var(--notch-faq));
}

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

.page-faq .faq-figure .media__caption {
  padding: 12px 16px 14px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: var(--slate);
  border-top: 1px solid var(--grid-line);
}

/* ---------- 结尾入口 ---------- */
.page-faq .faq-cta {
  padding: clamp(44px, 7vw, 84px) 0 0;
}

.page-faq .faq-cta__panel {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--faq-edge-hot);
  background:
    linear-gradient(120deg, rgba(226, 58, 46, 0.16), transparent 58%),
    var(--ink-800);
  clip-path: polygon(16px 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%, 0 16px);
}

.page-faq .faq-cta__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.6vw, 2.1rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-faq .faq-cta__copy p {
  margin: 12px 0 0;
  max-width: 46ch;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--slate);
}

.page-faq .faq-cta .btn {
  flex: 0 0 auto;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .qa__a {
    margin: 0 18px;
    padding: 16px 0 20px;
  }

  .page-faq .qa__q {
    padding: 17px 18px;
    font-size: 1rem;
  }

  .page-faq .faq-cta__panel {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
  }

  .page-faq .faq-cta__copy {
    flex: 1 1 auto;
  }
}

@media (min-width: 768px) {
  .page-faq .faq-group__body > .qa:nth-child(even) {
    margin-left: clamp(14px, 3.5vw, 46px);
  }

  .page-faq .faq-group__head {
    gap: 20px;
    padding-bottom: 14px;
    margin-bottom: 22px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero h1 {
    max-width: 24ch;
  }

  .page-faq .faq-hero__lead {
    max-width: 40ch;
    font-size: 1.05rem;
  }

  .page-faq .qa__a p {
    max-width: 68ch;
  }

  .page-faq .faq-figure {
    margin-top: 26px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-group__body > .qa:nth-child(even) {
    margin-left: 64px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa[open] .qa__a {
    animation: none;
  }

  .page-faq .faq-chip,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after {
    transition: none;
  }
}