.page-faq {
  --faq-line: rgba(7, 26, 47, 0.12);
  --faq-line-soft: rgba(7, 26, 47, 0.07);
  --faq-soft: rgba(11, 23, 36, 0.74);
  --faq-sand: rgba(239, 232, 218, 0.6);
  display: block;
  background: var(--frost);
  color: var(--ink);
  font-family: var(--font-sans);
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(255, 107, 44, 0.35);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: clamp(1.4rem, 4.5vw, 2.6rem) clamp(2rem, 5vw, 3.4rem);
  background:
    radial-gradient(115% 95% at 92% -12%, rgba(143, 216, 255, 0.46), rgba(143, 216, 255, 0) 62%),
    radial-gradient(80% 80% at 0% 112%, var(--cyan-a16), rgba(32, 240, 208, 0) 68%),
    linear-gradient(158deg, #F4FAFF 0%, #EAF3FC 58%, #DFEDF9 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -20% -10%;
  z-index: -1;
  pointer-events: none;
  background-image: repeating-linear-gradient(108deg, rgba(7, 26, 47, 0.055) 0 1px, transparent 1px 9px);
  opacity: 0.55;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -8%;
  bottom: -42%;
  z-index: -1;
  width: 48%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(32, 240, 208, 0.3), rgba(32, 240, 208, 0) 68%);
  pointer-events: none;
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(1.4rem, 4vw, 2.6rem);
  align-items: center;
}

.page-faq .faq-hero h1 {
  margin: 0.55rem 0 0.9rem;
  font-size: clamp(1.85rem, 5.6vw, 3.1rem);
  line-height: 1.14;
  letter-spacing: -0.025em;
  font-weight: 900;
}

.page-faq .faq-hero h1 em {
  font-style: normal;
  background: linear-gradient(transparent 64%, rgba(32, 240, 208, 0.5) 64%);
  padding-inline: 0.06em;
}

.page-faq .faq-hero .lede {
  max-width: 56ch;
  color: var(--faq-soft);
  font-size: clamp(0.95rem, 1.6vw, 1.03rem);
  line-height: 1.78;
}

.page-faq .faq-hot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin-top: 1.3rem;
}

.page-faq .faq-hot .label-mono {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--rock);
  margin-right: 0.2rem;
}

.page-faq .faq-hot .tag {
  display: inline-block;
  padding: 0.34rem 0.68rem;
  font-size: 0.8rem;
  line-height: 1.4;
  text-decoration: none;
  color: var(--deep);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--faq-line);
  border-radius: var(--r-sm);
  transition: transform var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease),
    box-shadow var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}

.page-faq .faq-hot .tag:hover {
  transform: translateY(-2px);
  border-color: var(--orange);
  background: #ffffff;
  box-shadow: 0 8px 18px -12px rgba(7, 26, 47, 0.6);
}

.page-faq .faq-hero-figure {
  margin: 0;
  border-radius: var(--r-lg);
}

.page-faq .faq-hero-figure img,
.page-faq .faq-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-faq .faq-hero-figure .media-caption,
.page-faq .faq-media .media-caption {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--rock);
}

/* ---------- 主体：索引 + 折叠问答 ---------- */
.page-faq .faq-body {
  background: var(--frost);
  padding-block: clamp(1.6rem, 4vw, 2.6rem) clamp(2rem, 5vw, 3rem);
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.8rem);
}

.page-faq .faq-index {
  border-top: 2px solid var(--ink);
  padding-top: 0.85rem;
}

.page-faq .faq-index-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--rock);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.1rem;
}

.page-faq .faq-index-list a {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
  padding: 0.5rem 0.4rem;
  font-size: 0.9rem;
  color: var(--faq-soft);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease),
    background var(--dur-fast) var(--ease);
}

.page-faq .faq-index-list a:hover {
  color: var(--deep);
  border-left-color: var(--orange);
  background: rgba(143, 216, 255, 0.18);
}

.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--moss);
}

.page-faq .faq-index-note {
  margin: 0.9rem 0 0;
  font-size: 0.78rem;
  line-height: 1.7;
  color: rgba(58, 68, 74, 0.9);
  max-width: 26ch;
}

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

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 1.2rem);
  padding-block: clamp(1.4rem, 3.5vw, 2.2rem);
}

.page-faq .faq-group + .faq-group {
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .faq-group:first-child {
  padding-top: 0;
}

.page-faq .faq-group-head {
  display: grid;
  gap: 0.45rem;
  margin-bottom: 1rem;
}

.page-faq .faq-group-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-faq .faq-group h2 {
  margin: 0;
  font-size: clamp(1.25rem, 3vw, 1.7rem);
  line-height: 1.3;
  letter-spacing: -0.012em;
  font-weight: 800;
}

.page-faq .faq-group-head p {
  margin: 0;
  max-width: 58ch;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--faq-soft);
}

.page-faq .faq-media {
  margin: 0.2rem 0 1.2rem;
  max-width: 32rem;
  border-radius: var(--r-md);
}

.page-faq .faq-path {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  margin: 0.2rem 0 1.2rem;
  overflow: visible;
}

.page-faq .faq-path text {
  font-family: var(--font-sans);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-line-soft);
  border-left: 2px solid transparent;
  padding-inline: 0.85rem;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-item:first-of-type {
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .faq-item[open] {
  background: linear-gradient(180deg, var(--faq-sand), rgba(239, 232, 218, 0.18));
  border-left-color: var(--ice);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 0.95rem 0;
  list-style: none;
  cursor: pointer;
  font-size: 0.97rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
  transition: color var(--dur-fast) var(--ease);
}

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

.page-faq .faq-item summary:hover {
  color: var(--deep);
}

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

.page-faq .faq-mark {
  position: relative;
  flex: none;
  width: 1.1rem;
  height: 1.1rem;
  margin-top: 0.32rem;
}

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

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

.page-faq .faq-item[open] .faq-mark::before {
  background: var(--orange);
}

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

.page-faq .faq-a {
  padding-bottom: 1.1rem;
}

.page-faq .faq-a p {
  margin: 0 0 0.6rem;
  max-width: 64ch;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--faq-soft);
}

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

.page-faq .faq-steps {
  counter-reset: faq-step;
  list-style: none;
  margin: 0.35rem 0 0.7rem;
  padding: 0;
  display: grid;
  gap: 0.4rem;
}

.page-faq .faq-steps li {
  counter-increment: faq-step;
  display: flex;
  gap: 0.6rem;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--faq-soft);
}

.page-faq .faq-steps li::before {
  content: counter(faq-step, decimal-leading-zero);
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 2.1;
  color: var(--orange);
}

.page-faq .faq-next {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--rock);
}

.page-faq .faq-next a {
  color: var(--deep);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
  transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.page-faq .faq-next a:hover {
  border-bottom-color: var(--orange);
}

/* ---------- 联系区块 ---------- */
.page-faq .faq-contact {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  scroll-margin-top: calc(var(--header-h) + 1rem);
  padding-block: clamp(2rem, 6vw, 3.6rem);
  color: var(--frost);
  background:
    radial-gradient(90% 85% at 100% 0%, rgba(32, 240, 208, 0.24), rgba(32, 240, 208, 0) 62%),
    linear-gradient(152deg, #071A2F 0%, #0C2640 60%, #071A2F 100%);
}

.page-faq .faq-contact::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image: repeating-linear-gradient(100deg, rgba(32, 240, 208, 0.16) 0 2px, transparent 2px 28px);
  opacity: 0.45;
}

.page-faq .faq-contact-inner {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.8rem);
}

.page-faq .faq-contact-copy .eyebrow {
  color: var(--cyan);
}

.page-faq .faq-contact h2 {
  margin: 0.55rem 0 0.8rem;
  font-size: clamp(1.4rem, 3.6vw, 2.05rem);
  line-height: 1.25;
  letter-spacing: -0.015em;
  font-weight: 900;
  color: var(--frost);
}

.page-faq .faq-contact-copy p {
  margin: 0 0 1.2rem;
  max-width: 52ch;
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(244, 250, 255, 0.82);
}

.page-faq .faq-contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
  align-content: start;
}

.page-faq .faq-contact-row {
  display: grid;
  gap: 0.22rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid rgba(244, 250, 255, 0.16);
}

.page-faq .faq-contact-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-contact-val {
  font-size: 0.96rem;
  line-height: 1.6;
  color: var(--frost);
  word-break: break-word;
}

.page-faq .faq-contact-val--mono {
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
}

/* ---------- 收尾 ---------- */
.page-faq .faq-tail {
  background: var(--frost);
  padding-block: clamp(1.8rem, 4.5vw, 3rem);
}

.page-faq .faq-tail-inner {
  display: grid;
  gap: 1rem;
  align-items: center;
}

.page-faq .faq-tail .lede {
  margin: 0;
  max-width: 48ch;
  color: var(--faq-soft);
  font-size: 0.95rem;
  line-height: 1.75;
}

.page-faq .faq-tail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-contact-inner {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }

  .page-faq .faq-tail-inner {
    grid-template-columns: 1fr auto;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: 1.05fr 0.95fr;
  }

  .page-faq .faq-layout {
    grid-template-columns: 15rem minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
  }

  .page-faq .faq-media {
    float: right;
    width: 40%;
    margin: 0.2rem 0 1rem 1.4rem;
  }

  .page-faq .faq-path {
    max-width: 34rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hot .tag,
  .page-faq .faq-item,
  .page-faq .faq-mark::before,
  .page-faq .faq-mark::after,
  .page-faq .faq-index-list a {
    transition: none;
  }

  .page-faq .faq-hot .tag:hover {
    transform: none;
  }
}