.page-faq {
  --faq-pad: clamp(18px, 3.6vw, 36px);
  --faq-gap: clamp(22px, 3.4vw, 46px);
  color: var(--cream);
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  margin: clamp(18px, 3vw, 34px) 0 clamp(42px, 6vw, 82px);
}

.page-faq .faq-hero__frame {
  position: relative;
  display: grid;
  gap: var(--faq-gap);
  padding: var(--faq-pad);
  border: 1px solid var(--grid);
  background:
    linear-gradient(158deg, rgba(30, 106, 90, 0.28), rgba(6, 31, 25, 0) 58%),
    var(--ink-900);
}

.page-faq .faq-hero__frame::before,
.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border: 1px solid var(--lime);
  opacity: 0.65;
  pointer-events: none;
}

.page-faq .faq-hero__frame::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-faq .faq-hero__frame::after {
  right: -1px;
  bottom: -1px;
  border-left: 0;
  border-top: 0;
}

.page-faq .faq-hero__text h1 {
  margin: 14px 0 18px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(34px, 8vw, 66px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.page-faq .faq-hero__text .lede {
  max-width: 40em;
  font-size: clamp(15px, 1.9vw, 17px);
  line-height: 1.9;
  color: var(--grey);
}

.page-faq .faq-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__jump a {
  display: inline-block;
  padding: 8px 13px;
  border: 1px solid var(--grid);
  color: var(--cream);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-hero__jump a:hover,
.page-faq .faq-hero__jump a:focus-visible {
  border-color: var(--lime);
  color: var(--lime);
  background-color: rgba(200, 255, 69, 0.07);
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--grid);
  background-color: var(--ink-800);
  overflow: hidden;
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.05) brightness(0.86);
}

/* ---------- 快速答案卡 ---------- */
.page-faq .faq-quick {
  padding-top: clamp(6px, 1.6vw, 16px);
}

.page-faq .faq-quick .section-head {
  margin-bottom: clamp(18px, 2.6vw, 30px);
}

.page-faq .faq-quick__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-faq .faq-quick__card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 18px 18px;
  border: 1px solid var(--grid);
  border-top: 2px solid var(--lime);
  background: linear-gradient(180deg, rgba(15, 53, 42, 0.62), rgba(10, 13, 12, 0.72));
  color: var(--cream);
  text-decoration: none;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-quick__card:hover,
.page-faq .faq-quick__card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--lime);
  background-color: rgba(15, 53, 42, 0.9);
}

.page-faq .faq-quick__num {
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--lime);
}

.page-faq .faq-quick__q {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--cream);
}

.page-faq .faq-quick__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--grey);
}

.page-faq .faq-quick__go {
  margin-top: auto;
  padding-top: 6px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--orange);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  padding-top: clamp(38px, 5vw, 66px);
  border-top: 1px solid var(--grid);
  margin-top: clamp(38px, 5vw, 66px);
}

.page-faq .faq-group__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
}

.page-faq .faq-group__index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--lime);
}

.page-faq .faq-group__title {
  margin: 8px 0 12px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(26px, 4.6vw, 40px);
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-faq .faq-group__note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--grey);
}

.page-faq .faq-group__toc {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--grid);
}

.page-faq .faq-group__toc li {
  border-bottom: 1px solid var(--grid);
}

.page-faq .faq-group__toc a {
  display: block;
  padding: 9px 0 9px 14px;
  position: relative;
  font-size: 13px;
  line-height: 1.5;
  color: var(--grey);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-group__toc a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 15px;
  width: 5px;
  height: 5px;
  border: 1px solid var(--grid);
  transform: rotate(45deg);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

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

.page-faq .faq-group__toc a:hover::before,
.page-faq .faq-group__toc a:focus-visible::before {
  border-color: var(--lime);
  background-color: var(--lime);
}

/* 折叠条目 */
.page-faq .faq-item {
  border: 1px solid var(--grid);
  background-color: rgba(10, 13, 12, 0.5);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-item + .faq-item {
  margin-top: 10px;
}

.page-faq .faq-item[open] {
  border-color: rgba(200, 255, 69, 0.45);
  background-color: rgba(15, 53, 42, 0.55);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 16px;
  list-style: none;
  cursor: pointer;
  font-size: 15px;
  line-height: 1.65;
  color: var(--cream);
}

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

.page-faq .faq-item summary::marker {
  content: "";
}

.page-faq .faq-item summary::after {
  content: "+";
  margin-left: auto;
  padding-left: 10px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.2;
  color: var(--grey);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-item__lamp {
  flex: none;
  width: 8px;
  height: 8px;
  margin-top: 8px;
  border: 1px solid var(--grid);
  transform: rotate(45deg);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .faq-item[open] .faq-item__lamp {
  background-color: var(--lime);
  border-color: var(--lime);
  box-shadow: 0 0 10px rgba(200, 255, 69, 0.55);
}

.page-faq .faq-item__q {
  font-weight: 500;
}

.page-faq .faq-item__a {
  padding: 2px 16px 18px 36px;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--grey);
}

.page-faq .faq-item__a p {
  margin: 0;
}

.page-faq .faq-item__a p + p {
  margin-top: 8px;
}

.page-faq .faq-item__a a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-tag {
  display: inline-block;
  margin-right: 6px;
  padding: 1px 6px;
  border: 1px solid var(--grid);
  font-size: 11px;
  letter-spacing: 0.12em;
  line-height: 1.6;
  color: var(--teal);
}

/* 分组配图 */
.page-faq .faq-figure {
  margin: 0 0 18px;
  border: 1px solid var(--grid);
  background-color: var(--ink-800);
  overflow: hidden;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05) brightness(0.82);
}

.page-faq .faq-figure figcaption {
  padding: 9px 12px;
  border-top: 1px solid var(--grid);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--grey);
}

/* ---------- 结束引导 ---------- */
.page-faq .faq-help {
  display: grid;
  gap: 18px;
  margin: clamp(40px, 5.5vw, 72px) 0 clamp(26px, 4vw, 48px);
  padding: var(--faq-pad);
  border: 1px solid var(--grid);
  border-left: 2px solid var(--orange);
  background-color: var(--ink-800);
}

.page-faq .faq-help__text h2 {
  margin: 8px 0 10px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(24px, 4vw, 36px);
  line-height: 1.1;
  color: var(--cream);
}

.page-faq .faq-help__text p {
  margin: 0;
  max-width: 44em;
  font-size: 14px;
  line-height: 1.9;
  color: var(--grey);
}

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

.page-faq .faq-help__link {
  display: inline-block;
  padding: 10px 16px;
  border: 1px solid var(--grid);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cream);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-help__link:hover,
.page-faq .faq-help__link:focus-visible {
  border-color: var(--lime);
  color: var(--lime);
  background-color: rgba(200, 255, 69, 0.07);
}

/* ---------- 断点 ---------- */
@media (min-width: 600px) {
  .page-faq .faq-quick__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-item summary {
    padding: 17px 20px;
    font-size: 15.5px;
  }

  .page-faq .faq-item__a {
    padding: 2px 20px 20px 40px;
  }

  .page-faq .faq-figure {
    max-width: 520px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__frame {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-quick__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-group__grid {
    grid-template-columns: minmax(230px, 3.2fr) minmax(0, 8fr);
    align-items: start;
  }

  .page-faq .faq-group__aside {
    position: sticky;
    top: 112px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick__card,
  .page-faq .faq-hero__jump a,
  .page-faq .faq-help__link,
  .page-faq .faq-item__lamp {
    transition: none;
  }

  .page-faq .faq-quick__card:hover,
  .page-faq .faq-quick__card:focus-visible {
    transform: none;
  }
}