/* ===== 答疑中心 page-faq ===== */

.page-faq {
  color: var(--paper);
  padding-bottom: 8px;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: 28px 0 42px;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(47, 224, 200, 0.05) 0 1px, transparent 1px 78px),
    radial-gradient(circle at 88% 12%, rgba(255, 176, 32, 0.1), transparent 46%);
  pointer-events: none;
}

.page-faq .faq-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .crumbs {
  margin-bottom: 22px;
}

.page-faq .faq-hero__split {
  display: grid;
  gap: 30px;
  margin-top: 20px;
}

.page-faq .faq-hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 14px;
}

.page-faq .faq-hero__eyebrow .num {
  color: var(--amber);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-size: 34px;
  line-height: 1.16;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 0 0 18px;
  max-width: 20ch;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  font-size: 16px;
  line-height: 1.8;
  color: #cfd8d4;
  margin: 0;
  max-width: 56ch;
}

.page-faq .faq-hero__meta {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-hero__meta-item {
  background: var(--ink-2);
  padding: 14px 16px 16px;
}

.page-faq .faq-hero__meta-item dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--grey);
  margin-bottom: 6px;
}

.page-faq .faq-hero__meta-item dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-hero__meta-item dd .num {
  color: var(--amber);
  font-size: 20px;
  margin-right: 2px;
}

/* ---------- 主体栅格 ---------- */

.page-faq .faq-body {
  display: grid;
  gap: 34px;
  padding-top: 40px;
}

/* ---------- 左侧目录 ---------- */

.page-faq .faq-index {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--ink-2), var(--ink));
  padding: 18px 18px 20px;
}

.page-faq .faq-index__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber);
  margin: 0 0 14px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line-strong);
}

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

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 9px 8px;
  border-radius: 8px;
  color: #c9d3cf;
  text-decoration: none;
  font-size: 14px;
  line-height: 1.45;
  transition: background-color 180ms ease, color 180ms ease;
}

.page-faq .faq-index__list a .num {
  color: var(--cyan);
  font-size: 12px;
  flex: none;
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  background: rgba(47, 224, 200, 0.1);
  color: var(--paper);
  outline: none;
}

/* ---------- 问答分组 ---------- */

.page-faq .faq-stream {
  display: grid;
  gap: 52px;
  min-width: 0;
}

.page-faq .faq-group {
  min-width: 0;
  scroll-margin-top: 96px;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--line-strong);
  margin-bottom: 8px;
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
  letter-spacing: -0.03em;
  flex: none;
}

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

.page-faq .faq-group__title {
  font-family: var(--font-display);
  font-size: 22px;
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 6px;
  color: var(--paper);
}

.page-faq .faq-group__note {
  margin: 0;
  font-size: 13px;
  color: var(--grey);
  line-height: 1.6;
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-q {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .faq-q__btn {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  padding: 17px 4px;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

.page-faq .faq-q__btn::after {
  content: "";
  flex: none;
  width: 12px;
  height: 12px;
  margin-top: 6px;
  margin-left: auto;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform 200ms ease;
}

.page-faq .faq-q__btn[aria-expanded="true"]::after {
  transform: rotate(-135deg);
}

.page-faq .faq-q__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--amber);
  flex: none;
  padding: 3px 8px;
  border: 1px solid rgba(255, 176, 32, 0.42);
  border-radius: 6px;
  line-height: 1.2;
}

.page-faq .faq-q__label {
  font-size: 16px;
  line-height: 1.6;
  font-weight: 600;
  color: var(--paper);
}

.page-faq .faq-q__btn:hover .faq-q__label,
.page-faq .faq-q__btn:focus-visible .faq-q__label {
  color: var(--amber-2);
}

.page-faq .faq-q__btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 6px;
}

.page-faq .accordion__item {
  border-bottom: 1px solid var(--line);
}

.page-faq .accordion__inner {
  padding: 0 4px 20px 46px;
}

.page-faq .accordion__inner p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.8;
  color: #c2cdc8;
}

.page-faq .accordion__inner p:last-child {
  margin-bottom: 0;
}

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

.page-faq .accordion__inner a:hover {
  color: var(--amber-2);
}

/* ---------- 配图 ---------- */

.page-faq .faq-fig {
  margin: 30px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-2);
}

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

.page-faq .faq-fig figcaption {
  padding: 12px 16px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--grey);
  border-top: 1px solid var(--line);
}

/* ---------- 底部联系带 ---------- */

.page-faq .faq-group--end .faq-group__head {
  border-bottom-color: rgba(47, 224, 200, 0.42);
}

.page-faq .faq-contact {
  margin-top: 22px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(47, 224, 200, 0.09), transparent 52%),
    linear-gradient(0deg, var(--ink-2), var(--ink-2));
  padding: 24px 20px 22px;
  display: grid;
  gap: 26px;
}

.page-faq .faq-contact__lead {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.8;
  color: #c9d3cf;
  max-width: 62ch;
}

.page-faq .faq-contact__list {
  margin: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}

.page-faq .faq-contact__row {
  background: var(--ink);
  padding: 13px 16px;
  display: grid;
  gap: 4px;
}

.page-faq .faq-contact__row dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--grey);
}

.page-faq .faq-contact__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-contact__row dd .num {
  color: var(--amber);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-contact__hint {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--grey);
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-contact__actions .btn {
  flex: 1 1 auto;
  text-align: center;
}

/* ================= 响应式 ================= */

@media (min-width: 620px) {
  .page-faq .faq-hero {
    padding: 34px 0 52px;
  }

  .page-faq .faq-hero h1 {
    font-size: 42px;
  }

  .page-faq .faq-hero__meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-contact {
    padding: 28px 26px 26px;
  }

  .page-faq .faq-contact__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-contact__actions .btn {
    flex: 0 0 auto;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__split {
    grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.7fr);
    gap: 52px;
    align-items: end;
  }

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

  .page-faq .faq-hero h1 {
    font-size: 50px;
    max-width: 22ch;
  }

  .page-faq .faq-body {
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 56px;
    padding-top: 52px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 108px;
  }

  .page-faq .faq-stream {
    gap: 64px;
  }

  .page-faq .faq-group__num {
    font-size: 42px;
  }

  .page-faq .faq-group__title {
    font-size: 26px;
  }

  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1.5fr) minmax(240px, 1fr);
    align-items: start;
    gap: 36px;
    padding: 32px 30px 30px;
  }

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

  .page-faq .faq-contact__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .page-faq .faq-contact__actions .btn {
    flex: 0 0 auto;
    width: 100%;
  }

  .page-faq .accordion__inner {
    padding-left: 58px;
    padding-right: 32px;
  }
}

@media (min-width: 1140px) {
  .page-faq .faq-hero h1 {
    font-size: 56px;
  }

  .page-faq .faq-body {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 72px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__list a,
  .page-faq .faq-q__btn::after {
    transition: none;
  }
}
</main>