.page-faq {
  --faq-rail: 216px;
  padding-bottom: 88px;
  background: var(--void);
}

/* —— 首屏 —— */
.page-faq .faq-hero {
  padding: 34px 0 30px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(640px 260px at 10% 0%, rgba(37, 214, 232, 0.10), transparent 70%),
    radial-gradient(520px 220px at 90% 20%, rgba(59, 240, 138, 0.06), transparent 72%),
    var(--void);
}

.page-faq .breadcrumb {
  margin-bottom: 20px;
}

.page-faq .faq-hero .exhibit {
  margin-bottom: 14px;
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  max-width: 20ch;
  font-size: clamp(28px, 6vw, 52px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-hero__lede {
  max-width: 64ch;
  margin: 0 0 26px;
  font-size: 17px;
  line-height: 1.78;
  color: rgba(232, 237, 249, 0.84);
}

.page-faq .faq-finder {
  display: grid;
  gap: 8px;
  max-width: 560px;
}

.page-faq .faq-finder__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-faq .faq-finder__input {
  width: 100%;
  padding: 12px 14px;
  background: var(--void-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 15px;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.page-faq .faq-finder__input::placeholder {
  color: var(--muted);
}

.page-faq .faq-finder__input:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(37, 214, 232, 0.18);
}

.page-faq .faq-hero__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  margin: 22px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

.page-faq .faq-hero__links a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(37, 214, 232, 0.35);
  padding-bottom: 1px;
}

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

/* —— 主体两栏 —— */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding-top: 34px;
}

/* —— 左侧分组索引 —— */
.page-faq .faq-index {
  padding: 16px;
  background: var(--void-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-index__list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__link {
  display: block;
  padding: 9px 10px;
  border-left: 2px solid transparent;
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.16s ease, border-color 0.16s ease, background 0.16s ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--ink);
  border-left-color: var(--cyan);
  background: rgba(37, 214, 232, 0.08);
}

/* —— 问答流 —— */
.page-faq .faq-group {
  margin-bottom: 46px;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-group__note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

.page-faq .faq-group__no {
  margin-right: 8px;
  color: var(--cyan);
}

/* —— 高频问题卡 —— */
.page-faq .faq-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-faq .faq-top__item {
  padding: 18px 18px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 3px solid var(--cyan);
  border-radius: var(--radius);
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.page-faq .faq-top__item:hover {
  transform: translate(-2px, -2px);
  border-color: var(--cyan);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-top__q {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}

.page-faq .faq-top__a {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(232, 237, 249, 0.78);
}

/* —— 折叠问答 —— */
.page-faq .faq-item {
  margin-bottom: 10px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.18s ease, background 0.18s ease;
}

.page-faq .faq-item:hover {
  border-left-color: var(--cyan);
}

.page-faq .faq-item[open] {
  background: var(--void-2);
  border-left-color: var(--cyan);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink);
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

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

.page-faq .faq-item__sign {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  border: 1px solid var(--line);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1;
}

.page-faq .faq-item__sign::before {
  content: "+";
}

.page-faq .faq-item[open] .faq-item__sign::before {
  content: "–";
}

.page-faq .faq-item[open] .faq-item__sign {
  border-color: var(--cyan);
  background: rgba(37, 214, 232, 0.12);
}

.page-faq .faq-item__a {
  margin: 0;
  padding: 0 18px 18px 16px;
  max-width: 74ch;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(232, 237, 249, 0.82);
}

/* —— 插图 —— */
.page-faq .faq-figure {
  margin: 4px 0 22px;
  padding: 10px;
  background: var(--void-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
}

.page-faq .faq-figure__caption {
  margin: 10px 2px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.65;
  color: var(--muted);
}

/* —— 求助收尾 —— */
.page-faq .faq-group--help {
  margin-bottom: 0;
}

.page-faq .faq-help {
  padding: 24px 20px 26px;
  background:
    linear-gradient(180deg, rgba(37, 214, 232, 0.10), transparent 72%),
    var(--void-2);
  border: 1px solid var(--cyan);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-help__title {
  margin: 0 0 12px;
  font-size: 21px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--ink);
}

.page-faq .faq-help__text {
  margin: 0 0 20px;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(232, 237, 249, 0.84);
}

.page-faq .faq-help__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0;
}

/* —— 断点 —— */
@media (min-width: 700px) {
  .page-faq .faq-top {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .faq-hero {
    padding: 48px 0 38px;
  }
  .page-faq .faq-index__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2px 8px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
    padding-top: 42px;
  }
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 22px);
  }
  .page-faq .faq-index__list {
    grid-template-columns: minmax(0, 1fr);
  }
  .page-faq .faq-group__title {
    font-size: 24px;
  }
}

@media (min-width: 1120px) {
  .page-faq .faq-top {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-top__item,
  .page-faq .faq-item,
  .page-faq .faq-index__link,
  .page-faq .faq-finder__input {
    transition: none;
  }
  .page-faq .faq-top__item:hover {
    transform: none;
  }
}