.page-faq {
  --faq-cut: 14px;
  --faq-gap: clamp(20px, 3vw, 34px);
  --faq-shadow: 0 16px 34px rgba(3, 18, 13, .38);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  padding-top: clamp(14px, 2.4vw, 22px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  margin-top: clamp(14px, 2.4vw, 24px);
  padding-block: clamp(26px, 4.6vw, 56px) clamp(24px, 4vw, 48px);
  background:
    radial-gradient(115% 92% at 88% -4%, rgba(47, 243, 208, .15), transparent 60%),
    radial-gradient(80% 70% at 4% 100%, rgba(255, 107, 53, .12), transparent 62%),
    linear-gradient(178deg, var(--turf-deep), var(--turf) 62%, var(--turf-deep));
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
}

.page-faq .faq-hero__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero__title {
  margin: .42em 0 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-size: clamp(30px, 5.4vw, 52px);
  line-height: 1.14;
  letter-spacing: .01em;
  color: var(--ivory);
}

.page-faq .faq-hero__lede {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.82;
  color: var(--mist);
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--line-strong);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
  box-shadow: var(--faq-shadow);
}

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

.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 4vw, 44px) 0 0;
  background: var(--line);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, var(--faq-cut) 100%, 0 calc(100% - var(--faq-cut)));
}

.page-faq .faq-hero__facts > div {
  padding: clamp(14px, 2.4vw, 22px) clamp(12px, 2vw, 20px);
  background: linear-gradient(180deg, rgba(6, 42, 32, .88), rgba(11, 61, 46, .72));
}

.page-faq .faq-hero__facts dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-faq .faq-hero__facts dd {
  margin: 8px 0 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
  color: var(--cyan);
}

.page-faq .faq-hero__v {
  font-family: var(--font-num);
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1;
  letter-spacing: .02em;
}

.page-faq .faq-hero__v span {
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
}

/* ---------- 主体分栏 ---------- */
.page-faq .faq-body {
  margin-block: clamp(30px, 5vw, 60px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
}

.page-faq .faq-nav__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mist);
}

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

.page-faq .faq-nav .toc__item {
  margin: 0;
}

.page-faq .faq-nav .toc__link {
  display: block;
  padding: 9px 13px;
  font-size: 14px;
  line-height: 1.4;
  color: var(--mist);
  text-decoration: none;
  background: linear-gradient(90deg, rgba(27, 42, 58, .6), rgba(27, 42, 58, 0));
  border-left: 2px solid rgba(169, 188, 179, .24);
  transition: color var(--ease), border-color var(--ease), background-color var(--ease);
}

.page-faq .faq-nav .toc__link:hover,
.page-faq .faq-nav .toc__link:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan-deep);
}

.page-faq .faq-nav .toc__link[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--orange);
  background: linear-gradient(90deg, rgba(47, 243, 208, .18), rgba(47, 243, 208, 0));
}

/* ---------- 章节 ---------- */
.page-faq .faq-sec + .faq-sec {
  margin-top: clamp(38px, 5.4vw, 68px);
  padding-top: clamp(28px, 4vw, 46px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-sec__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--orange);
}

.page-faq .faq-sec__title {
  margin: .5em 0 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.2vw, 32px);
  line-height: 1.26;
  color: var(--ivory);
}

.page-faq .faq-sec__lede {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-sec__figure {
  margin: clamp(22px, 3vw, 32px) 0 0;
}

.page-faq .faq-sec__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-faq .faq-sec__figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 问答手风琴 ---------- */
.page-faq .qa-list {
  margin-top: clamp(18px, 2.6vw, 26px);
  display: grid;
  gap: 10px;
}

.page-faq .qa {
  position: relative;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(27, 42, 58, .7), rgba(11, 61, 46, .52));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
  transition: border-color var(--ease), background-color var(--ease);
}

.page-faq .qa[open] {
  border-color: var(--line-strong);
  background: linear-gradient(180deg, rgba(27, 42, 58, .92), rgba(20, 107, 74, .38));
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: clamp(14px, 2.2vw, 18px) clamp(14px, 2.4vw, 22px);
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.6vw, 16px);
  font-weight: 600;
  line-height: 1.55;
  color: var(--ivory);
  transition: color var(--ease);
}

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

.page-faq .qa__q:hover {
  color: var(--cyan);
}

.page-faq .qa__q::after {
  content: "";
  flex: none;
  margin-left: auto;
  margin-top: 7px;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform var(--ease);
}

.page-faq .qa[open] .qa__q::after {
  transform: rotate(-135deg);
  margin-top: 11px;
}

.page-faq .qa__no {
  flex: none;
  min-width: 30px;
  font-family: var(--font-num);
  font-size: 15px;
  letter-spacing: .06em;
  line-height: 1.6;
  color: var(--orange);
}

.page-faq .qa__q > span:last-child {
  display: block;
}

.page-faq .qa__a {
  padding: 14px clamp(14px, 2.4vw, 22px) 18px;
  border-top: 1px dashed rgba(169, 188, 179, .22);
}

.page-faq .qa__a p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .qa__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 243, 208, .4);
}

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

/* ---------- 使用提示 ---------- */
.page-faq .usage-grid {
  margin-top: clamp(18px, 2.6vw, 26px);
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(min(230px, 100%), 1fr));
}

.page-faq .usage-card {
  padding: clamp(18px, 2.6vw, 24px);
  background: linear-gradient(158deg, rgba(27, 42, 58, .82), rgba(11, 61, 46, .5));
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
}

.page-faq .usage-card__no {
  margin: 0;
  font-family: var(--font-num);
  font-size: 26px;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-faq .usage-card__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.4;
  color: var(--ivory);
}

.page-faq .usage-card__text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-next {
  margin-top: clamp(36px, 5.4vw, 68px);
  background:
    radial-gradient(110% 120% at 12% 0%, rgba(47, 243, 208, .12), transparent 58%),
    linear-gradient(180deg, var(--panel), var(--turf-deep));
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-next__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: clamp(16px, 3vw, 28px);
  padding-block: clamp(24px, 4vw, 40px);
}

.page-faq .faq-next__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.32;
  color: var(--ivory);
}

.page-faq .faq-next__text {
  margin: 8px 0 0;
  max-width: 46ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

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

/* ---------- 媒体查询 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-sec__figure {
    max-width: 560px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
  }

  .page-faq .faq-body {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-nav {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-nav .toc__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 3px;
  }

  .page-faq .faq-nav .toc__link {
    padding: 9px 14px;
  }

  .page-faq .faq-sec__figure {
    max-width: 100%;
  }
}

@media (min-width: 1120px) {
  .page-faq .faq-sec {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__q,
  .page-faq .qa__q::after,
  .page-faq .faq-nav .toc__link {
    transition: none;
  }
}