.page-faq {
  --faq-hair: 1px solid var(--c-line);
  --faq-pad: clamp(16px, 4vw, 56px);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(24px, 5vw, 56px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(53, 242, 208, 0.12), transparent 62%),
    repeating-linear-gradient(90deg, transparent 0 79px, rgba(42, 74, 66, 0.45) 79px 80px);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 88%);
}

.page-faq .faq-hero .canvas {
  position: relative;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(20px, 3vw, 36px);
}

.page-faq .faq-hero__lead h1 {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(26px, 5.4vw, 46px);
  line-height: 1.28;
  letter-spacing: 0.04em;
  margin: 10px 0 16px;
  max-width: 18ch;
}

.page-faq .faq-hero__lead .lede {
  max-width: 46ch;
  font-size: clamp(15px, 1.8vw, 17px);
}

.page-faq .faq-hero__notes {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: var(--faq-hair);
}

.page-faq .faq-hero__notes li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 0;
  border-bottom: var(--faq-hair);
}

.page-faq .faq-hero__num {
  flex: 0 0 auto;
  min-width: 84px;
  color: var(--c-cyan);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.page-faq .faq-hero__note {
  color: var(--c-grey);
  font-size: 13px;
  line-height: 1.7;
}

.page-faq .faq-hero__figure {
  margin: 0;
}

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

/* 分类跳转条 */
.page-faq .faq-jump {
  position: sticky;
  top: 0;
  z-index: 4;
  background: var(--c-coal);
  border-top: var(--faq-hair);
  border-bottom: var(--faq-hair);
}

.page-faq .faq-jump__inner {
  display: flex;
  gap: 8px;
  padding-block: 10px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: none;
}

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

.page-faq .faq-jump__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: var(--faq-hair);
  border-radius: var(--r-sm);
  color: var(--c-paper);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  background: var(--c-turf);
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.page-faq .faq-jump__link .numeric {
  color: var(--c-cyan);
  font-size: 11px;
}

.page-faq .faq-jump__link:hover,
.page-faq .faq-jump__link:focus-visible {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
  outline: none;
}

/* 问题分组 */
.page-faq .faq-group__inner {
  display: grid;
  gap: clamp(18px, 3vw, 40px);
}

.page-faq .faq-group__head h2 {
  font-family: var(--f-sans);
  font-size: clamp(21px, 3.2vw, 29px);
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1.35;
  margin: 8px 0 10px;
}

.page-faq .faq-group__head p:last-child {
  color: var(--c-grey);
  font-size: 14px;
  line-height: 1.8;
  margin: 0;
  max-width: 30ch;
}

.page-faq .faq-list {
  border-top: var(--faq-hair);
}

.page-faq .faq-item {
  border-bottom: var(--faq-hair);
}

.page-faq .faq-item > summary {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 18px 34px 18px 18px;
  cursor: pointer;
  list-style: none;
  transition: color var(--t-fast) var(--ease);
}

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

.page-faq .faq-item > summary::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: var(--c-line);
  transition: background var(--t-fast) var(--ease);
}

.page-faq .faq-item > summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 16px;
  color: var(--c-grey);
  font-family: var(--f-mono);
  font-size: 18px;
  line-height: 1;
}

.page-faq .faq-item[open] > summary::before {
  background: var(--c-cyan);
}

.page-faq .faq-item[open] > summary::after {
  content: "–";
  color: var(--c-cyan);
}

.page-faq .faq-item > summary:hover h3,
.page-faq .faq-item > summary:focus-visible h3 {
  color: var(--c-cyan);
}

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

.page-faq .faq-num {
  flex: 0 0 auto;
  color: var(--c-cyan);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding-top: 6px;
}

.page-faq .faq-item h3 {
  margin: 0;
  font-family: var(--f-sans);
  font-size: clamp(16px, 2.2vw, 20px);
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.55;
  color: var(--c-paper);
  transition: color var(--t-fast) var(--ease);
}

.page-faq .faq-a {
  padding: 0 8px 20px 30px;
}

.page-faq .faq-a p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-paper);
}

.page-faq .faq-a p:last-child {
  margin-bottom: 0;
  color: var(--c-grey);
}

.page-faq .faq-link {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 208, 0.42);
}

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

.page-faq .faq-group__figure {
  margin: 22px 0 0;
}

.page-faq .faq-group__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

/* 联系支持 */
.page-faq .faq-support__inner {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

.page-faq .faq-support__card {
  background: var(--c-turf);
  border: var(--faq-hair);
  border-radius: var(--r-sm);
  padding: clamp(22px, 4vw, 40px);
}

.page-faq .faq-support__card h2 {
  font-family: var(--f-display);
  font-size: clamp(22px, 3.4vw, 32px);
  font-weight: 800;
  letter-spacing: 0.05em;
  line-height: 1.35;
  margin: 8px 0 12px;
}

.page-faq .faq-support__text {
  color: var(--c-grey);
  font-size: 14px;
  line-height: 1.85;
  margin: 0 0 20px;
}

.page-faq .faq-support__list {
  margin: 0;
  border-top: var(--faq-hair);
}

.page-faq .faq-support__list > div {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-bottom: var(--faq-hair);
}

.page-faq .faq-support__list dt {
  color: var(--c-grey);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.page-faq .faq-support__list dd {
  margin: 0;
  color: var(--c-paper);
  font-size: 15px;
  line-height: 1.7;
}

.page-faq .faq-mail {
  font-family: var(--f-mono);
  font-weight: 600;
  color: var(--c-cyan);
  word-break: break-all;
}

.page-faq .faq-support__side {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: clamp(20px, 3vw, 30px);
  background: var(--c-glass);
  border: var(--faq-hair);
  border-radius: var(--r-sm);
}

.page-faq .faq-support__side-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-paper);
}

.page-faq .faq-support__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-support__actions .btn {
  text-decoration: none;
}

.page-faq .faq-support__legal {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--c-grey);
}

/* 断点 */
@media (min-width: 768px) {
  .page-faq .faq-hero__notes {
    grid-template-columns: repeat(3, 1fr);
    border-top: none;
    gap: 0 20px;
  }

  .page-faq .faq-hero__notes li {
    flex-direction: column;
    gap: 6px;
    align-items: flex-start;
    border-top: var(--faq-hair);
  }

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

  .page-faq .faq-support__list > div {
    grid-template-columns: 96px 1fr;
    align-items: baseline;
    gap: 16px;
  }

  .page-faq .faq-a {
    padding-left: 34px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: center;
  }

  .page-faq .faq-group__inner {
    grid-template-columns: minmax(190px, 250px) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-faq .faq-group__head {
    position: sticky;
    top: 78px;
  }

  .page-faq .faq-group__head p:last-child {
    max-width: 24ch;
  }

  .page-faq .faq-group__figure {
    margin-top: 30px;
  }

  .page-faq .faq-support__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump__link,
  .page-faq .faq-item > summary,
  .page-faq .faq-item h3,
  .page-faq .faq-item > summary::before {
    transition: none;
  }
}