.page-faq {
  --faq-shell: 800px;
  --faq-hair: rgba(14, 92, 124, .16);
  --faq-hair-dark: rgba(111, 180, 206, .24);
  --faq-on-dark: rgba(246, 241, 231, .76);
  display: block;
  background: var(--ocean-050);
  color: var(--ink-900);
}

/* ---------- 顶部氛围条 ---------- */
.page-faq .faq-banner {
  position: relative;
  background: var(--ocean-950);
  line-height: 0;
  overflow: hidden;
}

.page-faq .faq-banner__img {
  display: block;
  width: 100%;
  height: clamp(110px, 20vw, 240px);
  object-fit: cover;
  object-position: center 68%;
  opacity: .7;
  filter: saturate(.85) contrast(1.06);
}

.page-faq .faq-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(4, 22, 31, .18) 0%, rgba(4, 22, 31, .9) 100%);
  pointer-events: none;
}

.page-faq .faq-banner__tag {
  position: absolute;
  left: var(--edge);
  bottom: 14px;
  z-index: 2;
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: .1em;
  color: var(--sand-100);
  background: rgba(8, 42, 59, .62);
  border: 1px solid var(--faq-hair-dark);
  border-radius: 999px;
  padding: 6px 14px;
  line-height: 1.4;
  backdrop-filter: blur(8px);
}

/* ---------- 刊头区 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--ocean-900);
  color: var(--sand-100);
  padding: clamp(26px, 5vw, 52px) 0 clamp(30px, 5.5vw, 62px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -280px;
  right: -160px;
  width: 620px;
  height: 620px;
  background: radial-gradient(circle, rgba(111, 180, 206, .3) 0%, rgba(111, 180, 206, 0) 68%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: -120px;
  bottom: -220px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(255, 106, 69, .16) 0%, rgba(255, 106, 69, 0) 70%);
  pointer-events: none;
}

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

.page-faq .faq-hero .wh-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  font-size: var(--step--1);
}

.page-faq .faq-hero .wh-crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(111, 180, 206, .6);
}

.page-faq .faq-hero .wh-crumbs a {
  color: rgba(233, 243, 247, .72);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-faq .faq-hero .wh-crumbs a:hover,
.page-faq .faq-hero .wh-crumbs a:focus-visible {
  color: #fff;
  border-bottom-color: var(--coral-500);
}

.page-faq .faq-hero .wh-crumbs [aria-current="page"] {
  color: var(--coral-500);
}

.page-faq .faq-hero .wh-eyebrow {
  display: inline-block;
  margin: 0;
  font-family: var(--font-narrow);
  font-size: var(--step--1);
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ocean-300);
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  max-width: 20ch;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(28px, 5.2vw, 54px);
  line-height: 1.2;
  letter-spacing: -.02em;
  color: #fff;
}

.page-faq .faq-hero__lede {
  margin: clamp(16px, 3vw, 26px) 0 0;
  max-width: 62ch;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--faq-on-dark);
}

.page-faq .faq-hero__lede strong {
  color: #fff;
  font-weight: 700;
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: clamp(22px, 4vw, 36px);
  max-width: var(--faq-shell);
}

.page-faq .faq-stat {
  padding: 14px 16px;
  border: 1px solid var(--faq-hair-dark);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .07);
  backdrop-filter: blur(8px);
}

.page-faq .faq-stat__n {
  display: block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(20px, 3vw, 30px);
  line-height: 1.1;
  color: var(--coral-500);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-stat__l {
  display: block;
  margin-top: 5px;
  font-size: var(--step--1);
  color: rgba(246, 241, 231, .7);
}

/* ---------- 检索与分类 ---------- */
.page-faq .faq-search-wrap {
  background: linear-gradient(180deg, var(--ocean-050) 0%, rgba(233, 243, 247, .88) 100%);
  border-bottom: 1px solid var(--faq-hair);
  padding: 18px 0 14px;
}

.page-faq .faq-search {
  display: grid;
  gap: 7px;
  max-width: var(--faq-shell);
  margin: 0 auto;
  padding: 14px;
  border: 1px solid var(--faq-hair);
  border-radius: var(--radius);
  background: var(--glass);
  backdrop-filter: blur(12px);
}

.page-faq .faq-search__label {
  font-family: var(--font-narrow);
  font-size: var(--step--1);
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--ocean-600);
}

.page-faq .faq-search__input {
  width: 100%;
  box-sizing: border-box;
  padding: 12px 14px;
  font-family: var(--font-sans);
  font-size: var(--step-0);
  color: var(--ink-900);
  background: #fff;
  border: 1px solid rgba(14, 92, 124, .28);
  border-radius: 10px;
  outline: none;
  transition: border-color var(--speed) ease, box-shadow var(--speed) ease;
}

.page-faq .faq-search__input::placeholder {
  color: rgba(58, 71, 80, .5);
}

.page-faq .faq-search__input:focus {
  border-color: var(--ocean-600);
  box-shadow: 0 0 0 3px rgba(14, 92, 124, .16);
}

.page-faq .faq-search__hint {
  margin: 0;
  font-size: var(--step--1);
  color: var(--ink-soft);
}

.page-faq .faq-jump {
  display: flex;
  gap: 8px;
  max-width: var(--faq-shell);
  margin: 12px auto 0;
  padding-bottom: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-faq .faq-jump__item {
  flex: none;
  padding: 7px 15px;
  font-size: var(--step--1);
  font-family: var(--font-narrow);
  font-weight: 700;
  letter-spacing: .04em;
  text-decoration: none;
  white-space: nowrap;
  color: var(--ocean-600);
  background: rgba(255, 255, 255, .62);
  border: 1px solid var(--faq-hair);
  border-radius: 999px;
  transition: background var(--speed) ease, color var(--speed) ease, border-color var(--speed) ease;
}

.page-faq .faq-jump__item:hover,
.page-faq .faq-jump__item:focus-visible {
  border-color: var(--ocean-600);
  color: var(--ocean-900);
}

.page-faq .faq-jump__item.is-active {
  background: var(--ocean-600);
  border-color: var(--ocean-600);
  color: #fff;
}

/* ---------- 问答流 ---------- */
.page-faq .faq-stream {
  background: var(--ocean-050);
  padding: clamp(28px, 5vw, 60px) 0 clamp(36px, 6vw, 88px);
}

.page-faq .faq-shell {
  max-width: var(--faq-shell);
  margin: 0 auto;
}

.page-faq .faq-block {
  scroll-margin-top: 24px;
}

.page-faq .faq-block + .faq-block {
  margin-top: clamp(42px, 6vw, 78px);
}

.page-faq .faq-block__head {
  padding-bottom: 14px;
  border-bottom: 2px solid var(--ocean-600);
  margin-bottom: 4px;
}

.page-faq .faq-block__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: .18em;
  color: var(--coral-600);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-block__title {
  margin: 6px 0 8px;
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: var(--step-3);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--ink-900);
}

.page-faq .faq-block__note {
  margin: 0;
  max-width: 56ch;
  font-size: var(--step-0);
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-list {
  display: block;
}

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

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: 34px 1fr 22px;
  gap: 10px;
  align-items: center;
  padding: 17px 2px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-narrow);
  font-weight: 700;
  font-size: var(--step-1);
  line-height: 1.5;
  color: var(--ink-900);
  transition: color var(--speed) ease;
}

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

.page-faq .faq-item__q:hover {
  color: var(--ocean-600);
}

.page-faq .faq-item__num {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--ocean-300);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-item[open] .faq-item__num {
  color: var(--coral-600);
}

.page-faq .faq-item__mark {
  position: relative;
  width: 22px;
  height: 22px;
  justify-self: end;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--ocean-600);
  transition: transform var(--speed) ease, opacity var(--speed) ease, background var(--speed) ease;
}

.page-faq .faq-item__mark::before {
  left: 3px;
  right: 3px;
  top: 10px;
  height: 2px;
}

.page-faq .faq-item__mark::after {
  top: 3px;
  bottom: 3px;
  left: 10px;
  width: 2px;
}

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

.page-faq .faq-item[open] .faq-item__mark::before {
  background: var(--coral-600);
}

.page-faq .faq-item__a {
  display: grid;
  gap: 12px;
  padding: 0 2px 22px;
  border-left: 2px solid rgba(111, 180, 206, .35);
  padding-left: 14px;
  margin-left: 0;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-faq .faq-item__a p {
  margin: 0;
}

.page-faq .faq-copy {
  justify-self: start;
  margin-top: 2px;
  padding: 6px 13px;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: var(--ocean-600);
  background: #fff;
  border: 1px solid rgba(14, 92, 124, .3);
  border-radius: 999px;
  cursor: pointer;
  transition: background var(--speed) ease, color var(--speed) ease, border-color var(--speed) ease;
}

.page-faq .faq-copy:hover,
.page-faq .faq-copy:focus-visible {
  background: var(--coral-050);
  border-color: var(--coral-600);
  color: var(--coral-600);
}

.page-faq .faq-copy.is-copied {
  background: var(--grass-500);
  border-color: var(--grass-500);
  color: #fff;
}

/* ---------- 术语表 ---------- */
.page-faq .faq-glossary {
  position: relative;
  overflow: hidden;
  background: var(--ocean-950);
  color: var(--sand-100);
  padding: clamp(36px, 6vw, 82px) 0;
  scroll-margin-top: 24px;
}

.page-faq .faq-glossary__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .14;
  filter: saturate(.55) contrast(1.1);
  pointer-events: none;
}

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

.page-faq .faq-glossary__head {
  max-width: var(--faq-shell);
  margin: 0 auto;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--coral-500);
}

.page-faq .faq-glossary .faq-block__idx {
  color: var(--coral-500);
}

.page-faq .faq-glossary__title {
  margin: 6px 0 8px;
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: var(--step-3);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: #fff;
}

.page-faq .faq-glossary__note {
  margin: 0;
  max-width: 52ch;
  font-size: var(--step-0);
  line-height: 1.75;
  color: var(--faq-on-dark);
}

.page-faq .faq-defs {
  display: block;
  max-width: var(--faq-shell);
  margin: 8px auto 0;
}

.page-faq .faq-defs__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3px 20px;
  padding: 14px 0;
  border-top: 1px solid var(--faq-hair-dark);
}

.page-faq .faq-defs__row:first-child {
  border-top: none;
}

.page-faq .faq-defs__row dt {
  font-family: var(--font-narrow);
  font-weight: 700;
  font-size: var(--step-1);
  letter-spacing: .02em;
  color: #fff;
}

.page-faq .faq-defs__row dd {
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.75;
  color: var(--faq-on-dark);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }

  .page-faq .faq-search {
    grid-template-columns: 168px 1fr;
    align-items: center;
    column-gap: 14px;
    row-gap: 6px;
    padding: 16px 18px;
  }

  .page-faq .faq-search__label {
    grid-column: 1;
    grid-row: 1;
    align-self: center;
  }

  .page-faq .faq-search__input {
    grid-column: 2;
    grid-row: 1;
  }

  .page-faq .faq-search__hint {
    grid-column: 2;
    grid-row: 2;
  }

  .page-faq .faq-item__q {
    grid-template-columns: 46px 1fr 24px;
    gap: 16px;
    padding: 20px 4px;
    font-size: var(--step-2);
  }

  .page-faq .faq-item__a {
    padding-left: 66px;
    border-left: none;
    margin-left: 0;
    padding-bottom: 26px;
  }

  .page-faq .faq-item__a > p {
    border-left: 2px solid rgba(111, 180, 206, .4);
    padding-left: 16px;
  }

  .page-faq .faq-item__a > .faq-copy {
    margin-left: 18px;
  }

  .page-faq .faq-defs__row {
    grid-template-columns: 190px 1fr;
    align-items: baseline;
    padding: 16px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-jump__item,
  .page-faq .faq-copy,
  .page-faq .faq-search__input,
  .page-faq .faq-item__q {
    transition: none;
  }
}