.page-faq {
  --faq-rail-w: 236px;
  --faq-tint: rgba(37, 244, 208, 0.1);
  display: block;
  position: relative;
  background:
    radial-gradient(1100px 560px at 84% -6%, rgba(37, 244, 208, 0.09), transparent 70%),
    radial-gradient(860px 500px at 2% 10%, rgba(255, 107, 44, 0.06), transparent 74%),
    var(--ink);
  color: var(--silver);
  padding-bottom: clamp(64px, 10vw, 128px);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + clamp(44px, 8vw, 96px)) 0 clamp(36px, 5vw, 60px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(30, 42, 66, 0.55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 42, 66, 0.55) 1px, transparent 1px);
  background-size: 96px 96px;
  -webkit-mask-image: radial-gradient(720px 420px at 22% 26%, #000 0%, transparent 78%);
  mask-image: radial-gradient(720px 420px at 22% 26%, #000 0%, transparent 78%);
  opacity: 0.5;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -8%;
  bottom: 6%;
  width: 46vw;
  max-width: 620px;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(37, 244, 208, 0.6), transparent);
  transform: rotate(-10deg);
  transform-origin: right center;
  pointer-events: none;
}

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

.page-faq .faq-hero .crumbs {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-faq .faq-hero__body {
  display: grid;
  gap: 22px;
}

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(36px, 6.4vw, 74px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--white);
  text-wrap: balance;
}

.page-faq .faq-hero__lede {
  margin: 0;
  font-size: clamp(16px, 1.7vw, 17px);
  line-height: 1.78;
  color: var(--silver);
  max-width: 52ch;
}

@media (min-width: 960px) {
  .page-faq .faq-hero__body {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(40px, 5vw, 72px);
    align-items: end;
  }
  .page-faq .faq-hero__title {
    order: 1;
  }
  .page-faq .faq-hero__lede {
    order: 2;
    padding-bottom: 6px;
  }
}

/* ---------- 首屏数据条 ---------- */

.page-faq .faq-facts {
  list-style: none;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: clamp(20px, 3vw, 28px) 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 32px);
}

@media (min-width: 760px) {
  .page-faq .faq-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-faq .faq-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-faq .faq-fact__num {
  display: block;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--cyan);
}

.page-faq .faq-fact:nth-child(2) .faq-fact__num {
  color: var(--white);
}

.page-faq .faq-fact__label {
  display: block;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--mist);
  line-height: 1.5;
}

/* ---------- 主体两栏 ---------- */

.page-faq .faq-body {
  padding-top: clamp(24px, 4vw, 40px);
}

.page-faq .faq-shell {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
  align-items: start;
}

@media (min-width: 1020px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(48px, 6vw, 88px);
  }
}

/* ---------- 左侧问题索引 ---------- */

.page-faq .faq-rail__title {
  margin: 0 0 16px;
  color: var(--mist);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-rail__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 18px;
  border-bottom: 2px solid var(--line);
  border-radius: var(--r-pill);
  color: var(--mist);
  font-size: 15px;
  line-height: 1.4;
  white-space: nowrap;
  text-decoration: none;
  transition: color 240ms var(--ease), border-color 240ms var(--ease), background-color 240ms var(--ease);
}

.page-faq .faq-rail__link:hover {
  color: var(--silver);
  border-bottom-color: var(--mist);
}

.page-faq .faq-rail__link.is-active {
  color: var(--white);
  border-bottom-color: var(--cyan);
  background: var(--faq-tint);
}

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

.page-faq .faq-rail__num {
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

@media (min-width: 1020px) {
  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 32px);
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }

  .page-faq .faq-rail__link {
    border-bottom: 0;
    border-left: 2px solid var(--line);
    border-radius: 0 var(--r-pill) var(--r-pill) 0;
    padding: 12px 16px 12px 18px;
    white-space: normal;
  }

  .page-faq .faq-rail__link.is-active {
    border-bottom-color: transparent;
    border-left-color: var(--cyan);
    background: linear-gradient(90deg, var(--faq-tint), transparent 88%);
  }
}

/* ---------- 问题分区 ---------- */

.page-faq .faq-group {
  padding: clamp(34px, 5vw, 58px) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-group:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-faq .faq-group__idx {
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--cyan);
  padding-top: 8px;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(23px, 3vw, 34px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-group__desc {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  max-width: 56ch;
}

/* ---------- 折叠条目 ---------- */

.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--stand);
  overflow: hidden;
  transition: border-color 240ms var(--ease), box-shadow 240ms var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(37, 244, 208, 0.4);
}

.page-faq .faq-item[open] {
  border-color: rgba(37, 244, 208, 0.55);
  box-shadow: inset 3px 0 0 0 var(--cyan);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: clamp(15px, 2.2vw, 21px) clamp(16px, 2.6vw, 26px);
  cursor: pointer;
  list-style: none;
  color: var(--white);
  font-size: clamp(15px, 1.6vw, 17px);
  font-weight: 600;
  line-height: 1.55;
  transition: color 200ms var(--ease);
}

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

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -3px;
}

.page-faq .faq-item__num {
  flex: 0 0 auto;
  min-width: 24px;
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding-top: 3px;
}

.page-faq .faq-item__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item__icon {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-left: 4px;
  margin-top: 3px;
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  border-radius: 2px;
  transition: transform 240ms var(--ease), opacity 240ms var(--ease);
}

.page-faq .faq-item__icon::before {
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  margin-top: -1px;
}

.page-faq .faq-item__icon::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  margin-left: -1px;
}

.page-faq .faq-item[open] .faq-item__icon::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-item[open] .faq-item__q {
  color: var(--white);
}

.page-faq .faq-item__a {
  border-top: 1px solid rgba(30, 42, 66, 0.9);
  padding: clamp(14px, 2vw, 20px) clamp(16px, 2.6vw, 26px) clamp(18px, 2.4vw, 26px);
}

.page-faq .faq-item__a > p {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--silver);
  overflow-wrap: anywhere;
}

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(37, 244, 208, 0.42);
  transition: border-color 200ms var(--ease);
}

.page-faq .faq-item__a a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 配图 ---------- */

.page-faq .faq-figure {
  margin: clamp(22px, 3vw, 32px) 0 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-media {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--stand);
}

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

.page-faq .faq-media--portrait {
  width: 100%;
  max-width: 250px;
  aspect-ratio: 9 / 16;
}

.page-faq .faq-media--wide {
  width: 100%;
  aspect-ratio: 3 / 2;
}

.page-faq .faq-figure__cap {
  font-size: 13px;
  line-height: 1.72;
  letter-spacing: 0.02em;
  color: var(--mist);
  max-width: 46ch;
}

@media (min-width: 620px) {
  .page-faq .faq-figure--portrait {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 24px;
    align-items: center;
  }

  .page-faq .faq-figure--portrait .faq-figure__cap {
    padding-bottom: 4px;
  }

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

/* ---------- 底部提示 ---------- */

.page-faq .faq-next {
  margin-top: clamp(40px, 7vw, 88px);
}

.page-faq .faq-next__inner {
  position: relative;
  display: grid;
  gap: 26px;
  padding: clamp(26px, 4vw, 48px);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background:
    linear-gradient(115deg, rgba(37, 244, 208, 0.11), transparent 46%),
    var(--stand);
  overflow: hidden;
}

.page-faq .faq-next__inner::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), rgba(255, 107, 44, 0.85), transparent 78%);
  pointer-events: none;
}

.page-faq .faq-next__copy .index-label {
  color: var(--cyan);
  margin: 0 0 12px;
}

.page-faq .faq-next__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-next__text {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--silver);
  max-width: 62ch;
}

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

.page-faq .faq-next__actions .btn {
  text-decoration: none;
}

@media (min-width: 880px) {
  .page-faq .faq-next__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: clamp(32px, 5vw, 72px);
  }

  .page-faq .faq-next__actions {
    flex-direction: column;
    align-items: stretch;
    min-width: 220px;
  }
}