.page-faq {
  --faq-line: rgba(185, 203, 216, 0.16);
  --faq-panel: #0C263B;
  --faq-panel-hi: #123A54;
  --faq-dash: rgba(185, 203, 216, 0.14);
  position: relative;
  padding-bottom: clamp(56px, 8vw, 104px);
  color: var(--mist);
}

.page-faq .breadcrumb {
  padding-top: clamp(16px, 3vw, 28px);
}

.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-faq .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(185, 203, 216, 0.5);
}

.page-faq .breadcrumb a {
  color: var(--cyan-soft);
  text-decoration: none;
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--cyan);
  text-decoration: underline;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 5vw, 54px) 0 clamp(32px, 6vw, 66px);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -30% -10% auto auto;
  width: 62%;
  height: 180%;
  background:
    radial-gradient(closest-side, rgba(53, 224, 208, 0.16), transparent 72%),
    radial-gradient(closest-side, rgba(255, 107, 74, 0.12), transparent 70%);
  background-position: 78% 12%, 20% 82%;
  background-size: 70% 60%, 60% 55%;
  background-repeat: no-repeat;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
}

.page-faq .faq-hero__copy h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(28px, 6vw, 46px);
  line-height: 1.24;
  letter-spacing: 0.04em;
  color: var(--cream);
}

.page-faq .faq-hero__copy .lede {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-hero__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-figures {
  list-style: none;
  margin: 0;
  padding: 1px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
  border-radius: var(--r-m);
  overflow: hidden;
}

.page-faq .faq-figures li {
  background: var(--faq-panel);
  padding: 16px 14px;
}

.page-faq .faq-figures strong {
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--sand);
}

.page-faq .faq-figures span {
  margin-left: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-faq .faq-figures p {
  margin: 8px 0 0;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--mist);
  opacity: 0.85;
}

/* ---------- 索引 + 问答 ---------- */

.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  padding-top: clamp(28px, 5vw, 56px);
}

.page-faq .faq-index {
  min-width: 0;
  border-top: 1px solid var(--faq-line);
  padding-top: 18px;
}

.page-faq .faq-index .label {
  margin: 0;
  color: var(--sand);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 9px 14px;
  border: 1px solid var(--faq-line);
  border-radius: 999px;
  font-size: 14px;
  color: var(--mist);
  text-decoration: none;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease),
    background-color 0.24s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--cyan-soft);
  border-color: rgba(53, 224, 208, 0.5);
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--sand);
}

.page-faq .faq-index__tip {
  margin-top: 18px;
  padding: 14px 16px;
  border: 1px solid var(--faq-line);
  border-radius: var(--r-m);
  background: rgba(18, 58, 84, 0.5);
}

.page-faq .faq-index__tip .label {
  margin: 0 0 6px;
  color: var(--cyan);
}

.page-faq .faq-index__tip p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
}

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

/* ---------- 问题分组 ---------- */

.page-faq .faq-group {
  padding-bottom: clamp(24px, 4vw, 38px);
  margin-bottom: clamp(24px, 4vw, 38px);
  border-bottom: 1px solid var(--faq-line);
  scroll-margin-top: 96px;
}

.page-faq .faq-group:last-of-type {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 6px 14px;
  align-items: baseline;
  margin-bottom: 18px;
}

.page-faq .faq-group__no {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--sand);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 3.2vw, 26px);
  line-height: 1.35;
  letter-spacing: 0.04em;
  color: var(--cream);
}

.page-faq .faq-group__head p {
  grid-column: 2;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
}

/* ---------- 配图 ---------- */

.page-faq .faq-shot {
  margin: 0 0 20px;
  border: 1px solid var(--faq-line);
  border-radius: var(--r-m);
  overflow: hidden;
  background: var(--faq-panel-hi);
}

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

.page-faq .faq-shot .media__caption {
  padding: 10px 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-shot--tall {
  max-width: 300px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- 手风琴 ---------- */

.page-faq .faq-item {
  margin-bottom: 8px;
  border: 1px solid var(--faq-line);
  border-left: 2px solid transparent;
  border-radius: var(--r-s);
  background: var(--faq-panel);
  transition: border-color 0.24s var(--ease), background-color 0.24s var(--ease),
    box-shadow 0.24s var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(53, 224, 208, 0.28);
}

.page-faq .faq-item[open] {
  border-left-color: var(--cyan);
  background: linear-gradient(
    180deg,
    rgba(18, 58, 84, 0.92),
    rgba(12, 38, 59, 0.94)
  );
  box-shadow: 0 10px 26px -18px rgba(53, 224, 208, 0.7);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--cream);
}

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

.page-faq .faq-item summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.2;
  color: var(--cyan);
}

.page-faq .faq-item[open] summary::after {
  content: "\2212";
}

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

.page-faq .faq-item__body {
  margin: 0 16px;
  padding: 14px 0 16px;
  border-top: 1px solid var(--faq-dash);
  font-size: 14.5px;
  line-height: 1.78;
}

.page-faq .faq-item__body p {
  margin: 0 0 10px;
}

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

.page-faq .faq-steps {
  list-style: none;
  counter-reset: faq-step;
  margin: 0 0 10px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-steps li {
  counter-increment: faq-step;
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}

.page-faq .faq-steps li::before {
  content: counter(faq-step);
  display: grid;
  place-items: center;
  width: 24px;
  height: 20px;
  border-radius: 6px;
  background: var(--cyan);
  color: var(--abyss);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1;
}

/* ---------- 相关内容 ---------- */

.page-faq .faq-tail {
  margin-top: clamp(24px, 4vw, 36px);
  padding: 18px 20px;
  border: 1px solid var(--faq-line);
  border-radius: var(--r-m);
  background: rgba(7, 26, 43, 0.55);
}

.page-faq .faq-tail .label {
  margin: 0 0 10px;
  color: var(--sand);
}

.page-faq .faq-tail ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-faq .faq-tail a {
  color: var(--cyan-soft);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.7;
  transition: color 0.24s var(--ease);
}

.page-faq .faq-tail a:hover,
.page-faq .faq-tail a:focus-visible {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 断点 ---------- */

@media (min-width: 700px) {
  .page-faq .faq-shot--tall {
    max-width: 340px;
    margin-left: auto;
    margin-right: 0;
  }

  .page-faq .faq-item summary {
    padding: 16px 20px;
    font-size: 16px;
  }

  .page-faq .faq-item__body {
    margin: 0 20px;
    padding: 16px 0 18px;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    align-items: start;
  }

  .page-faq .faq-figures {
    margin-top: 8px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-shell {
    grid-template-columns: 230px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 108px;
    border-top: 0;
    padding-top: 0;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
    margin-top: 14px;
  }

  .page-faq .faq-index__link {
    width: 100%;
    padding: 10px 0 10px 14px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    font-size: 15px;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: rgba(53, 224, 208, 0.5);
    background: linear-gradient(90deg, rgba(53, 224, 208, 0.1), transparent 72%);
  }

  .page-faq .faq-index__link.is-active {
    color: var(--cyan);
    border-left-color: var(--cyan);
    background: linear-gradient(90deg, rgba(53, 224, 208, 0.16), transparent 78%);
  }

  .page-faq .faq-index__link.is-active .faq-index__no {
    color: var(--cyan-soft);
  }

  .page-faq .faq-index__tip {
    margin-top: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-index__link,
  .page-faq .faq-tail a {
    transition: none;
  }
}