.page-faq {
  --faq-gap: clamp(14px, 1.8vw, 22px);
  --faq-hair: rgba(40, 75, 102, 0.72);
  --faq-fade: rgba(54, 224, 255, 0.14);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 48px) 0 clamp(36px, 5vw, 68px);
  background:
    radial-gradient(120% 90% at 88% 8%, rgba(54, 224, 255, 0.12), transparent 58%),
    linear-gradient(158deg, var(--ink-950) 0%, var(--ink-900) 52%, var(--ink-800) 100%);
  border-bottom: 1px solid var(--line-600);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(40, 75, 102, 0.42) 0 1px, transparent 1px 104px),
    repeating-linear-gradient(0deg, rgba(40, 75, 102, 0.26) 0 1px, transparent 1px 104px);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 82%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 82%);
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: center;
}

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

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

.page-faq .faq-hero h1 {
  margin: clamp(10px, 1.6vw, 16px) 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2.35rem, 6.4vw, 4.4rem);
  line-height: 0.96;
  letter-spacing: -0.015em;
  color: var(--mist-100);
  text-transform: none;
}

.page-faq .faq-hero h1 em {
  display: block;
  font-style: normal;
  color: var(--cyan-400);
}

.page-faq .faq-hero__intro {
  max-width: 52ch;
  margin-top: clamp(16px, 2.4vw, 24px);
  font-size: clamp(0.95rem, 1.15vw, 1.06rem);
  line-height: 1.8;
  color: var(--steel-300);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 4vw, 40px) 0 0;
  background: var(--faq-hair);
  border: 1px solid var(--faq-hair);
}

.page-faq .faq-stats__cell {
  padding: 14px 14px 16px;
  background: var(--ink-950);
}

.page-faq .faq-stats dt {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel-500);
}

.page-faq .faq-stats dd {
  margin: 6px 0 0;
  font-family: var(--font-head);
  font-size: clamp(1.05rem, 1.5vw, 1.3rem);
  font-weight: 700;
  color: var(--mist-100);
}

.page-faq .faq-stats .data-num {
  font-size: 1.15em;
}

.page-faq .faq-hero__media {
  margin: 0;
  min-width: 0;
}

.page-faq .faq-hero__media .media-frame {
  border: 1px solid var(--line-600);
}

.page-faq .faq-hero__media figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--steel-500);
}

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

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(26px, 3vw, 44px);
  padding-top: clamp(32px, 5vw, 64px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

/* 索引 */
.page-faq .faq-index {
  min-width: 0;
  padding: 18px 16px 20px;
  background: linear-gradient(180deg, var(--ink-800), var(--ink-900));
  border: 1px solid var(--line-600);
  border-left: 2px solid var(--cyan-600);
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.page-faq .faq-index__list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--faq-hair);
}

.page-faq .faq-index__list li {
  background: var(--ink-900);
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 10px;
  text-decoration: none;
  color: var(--steel-300);
  border-left: 2px solid transparent;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  background: var(--ink-700);
  border-left-color: var(--cyan-400);
  color: var(--mist-100);
}

.page-faq .faq-index__list a:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: -2px;
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--cyan-400);
}

.page-faq .faq-index__label {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 0.9rem;
  line-height: 1.4;
}

.page-faq .faq-index__count {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--steel-500);
}

.page-faq .faq-index__note {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-index__note p {
  margin: 0 0 12px;
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--steel-500);
}

.page-faq .faq-index__note .btn {
  display: inline-block;
  font-size: 0.82rem;
}

/* ---------- 问答组 ---------- */
.page-faq .faq-groups {
  min-width: 0;
  display: grid;
  gap: clamp(34px, 5vw, 62px);
}

.page-faq .faq-group {
  min-width: 0;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(12px, 2vw, 20px);
  align-items: start;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--line-600);
}

.page-faq .faq-group__no {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3.4vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--cyan-600);
  color: rgba(54, 224, 255, 0.32);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--mist-100);
}

.page-faq .faq-group__head p {
  margin: 8px 0 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--steel-300);
}

.page-faq .faq-group__figure {
  margin: 20px 0 6px;
}

.page-faq .faq-group__figure .media-frame {
  border: 1px solid var(--line-600);
}

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

.page-faq .faq-group__figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--steel-500);
}

/* 条目 */
.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-hair);
  background: transparent;
  transition: background 0.22s var(--ease);
}

.page-faq .faq-item:hover {
  background: rgba(23, 55, 80, 0.42);
}

.page-faq .faq-item summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  padding: 16px 12px 16px 10px;
  list-style: none;
  cursor: pointer;
}

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

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: -2px;
}

.page-faq .faq-item__no {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  line-height: 1.9;
  color: var(--cyan-400);
  transition: color 0.2s var(--ease);
}

.page-faq .faq-item__q {
  font-family: var(--font-body);
  font-size: clamp(0.95rem, 1.2vw, 1.02rem);
  font-weight: 500;
  line-height: 1.7;
  color: var(--mist-100);
  word-break: break-word;
}

.page-faq .faq-item__icon {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 4px;
  border: 1px solid var(--line-600);
  transition: border-color 0.2s var(--ease);
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 4px;
  right: 4px;
  height: 1px;
  background: var(--cyan-400);
  transition: transform 0.24s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-item__icon::after {
  transform: rotate(90deg);
}

.page-faq .faq-item[open] .faq-item__icon {
  border-color: var(--orange-500);
}

.page-faq .faq-item[open] .faq-item__icon::before,
.page-faq .faq-item[open] .faq-item__icon::after {
  background: var(--orange-500);
}

.page-faq .faq-item[open] .faq-item__icon::after {
  transform: rotate(0deg);
}

.page-faq .faq-item[open] .faq-item__no {
  color: var(--orange-300);
}

.page-faq .faq-item__body {
  padding: 0 12px 20px 10px;
  border-left: 2px solid var(--orange-500);
  margin-left: 10px;
}

.page-faq .faq-item__body p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.85;
  color: var(--steel-300);
  word-break: break-word;
}

/* ---------- 联系卡片 ---------- */
.page-faq .faq-contact {
  margin-top: 22px;
  padding: clamp(18px, 2.6vw, 26px);
  background:
    linear-gradient(135deg, rgba(54, 224, 255, 0.08), transparent 62%),
    var(--ink-800);
  border: 1px solid var(--line-600);
  border-top: 2px solid var(--orange-500);
}

.page-faq .faq-contact h3 {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  font-weight: 700;
  color: var(--mist-100);
}

.page-faq .faq-contact__list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--faq-hair);
}

.page-faq .faq-contact__list li {
  display: grid;
  gap: 4px;
  padding: 11px 12px;
  background: var(--ink-900);
}

.page-faq .faq-contact__key {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel-500);
}

.page-faq .faq-contact__val {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--mist-100);
  word-break: break-word;
}

.page-faq .faq-contact__val--mail {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--cyan-400);
}

.page-faq .faq-contact__note {
  margin: 16px 0 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--steel-500);
}

/* ---------- 尾部入口 ---------- */
.page-faq .faq-next {
  padding: clamp(32px, 5vw, 64px) 0 clamp(44px, 6vw, 80px);
  background: linear-gradient(180deg, var(--ink-950), var(--ink-900));
  border-top: 1px solid var(--line-600);
}

.page-faq .faq-next__head {
  max-width: 58ch;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-faq .faq-next__head h2 {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.2vw, 2.2rem);
  line-height: 1.14;
  color: var(--mist-100);
}

.page-faq .faq-next__head p:last-child {
  margin: 10px 0 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--steel-300);
}

.page-faq .faq-next__list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--faq-hair);
  border: 1px solid var(--faq-hair);
}

.page-faq .faq-next__list a {
  display: grid;
  gap: 6px;
  height: 100%;
  padding: 18px 16px;
  background: var(--ink-950);
  text-decoration: none;
  transition: background 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-faq .faq-next__list a:hover,
.page-faq .faq-next__list a:focus-visible {
  background: var(--ink-800);
  transform: translateY(-2px);
}

.page-faq .faq-next__list a:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: -2px;
}

.page-faq .faq-next__no {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--cyan-400);
}

.page-faq .faq-next__list strong {
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--mist-100);
}

.page-faq .faq-next__desc {
  font-size: 0.84rem;
  line-height: 1.65;
  color: var(--steel-500);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-contact__list li {
    grid-template-columns: 108px minmax(0, 1fr);
    align-items: baseline;
    gap: 12px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-faq .faq-item summary {
    padding: 18px 14px 18px 12px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: 272px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-next__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__list a,
  .page-faq .faq-item,
  .page-faq .faq-item__icon,
  .page-faq .faq-item__icon::before,
  .page-faq .faq-item__icon::after,
  .page-faq .faq-next__list a {
    transition: none;
  }

  .page-faq .faq-next__list a:hover {
    transform: none;
  }
}