.page-faq {
  --faq-gap: clamp(20px, 3.4vw, 40px);
  --faq-pad: clamp(16px, 2.6vw, 26px);
  --faq-accent-soft: rgba(46, 230, 168, 0.08);
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  padding-top: clamp(14px, 2.6vw, 26px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(34px, 5.6vw, 78px) 0 clamp(32px, 5vw, 62px);
  background:
    radial-gradient(115% 85% at 88% -10%, rgba(46, 230, 168, 0.13), transparent 58%),
    radial-gradient(90% 70% at 2% 112%, rgba(255, 122, 26, 0.11), transparent 60%),
    linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -10% -6% -10% -6%;
  background: repeating-linear-gradient(114deg, rgba(46, 230, 168, 0.05) 0 1px, transparent 1px 112px);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: -4%;
  right: -4%;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--mint) 34%, var(--orange) 72%, transparent);
  opacity: 0.5;
  transform: rotate(-1.1deg);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--faq-gap);
  align-items: end;
}

.page-faq .faq-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mint);
}

.page-faq .faq-hero__kicker::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--mint);
}

.page-faq .faq-hero__title {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 17ch;
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 6.2vw, 4.3rem);
  line-height: 1.03;
  letter-spacing: -0.03em;
  color: var(--text);
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 58ch;
  font-size: clamp(15px, 2vw, 17px);
  line-height: 1.78;
  color: var(--text-2);
}

.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 28px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-faq .faq-fact__value {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.5rem, 4.2vw, 2.1rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--yellow);
}

.page-faq .faq-fact__value small {
  margin-left: 4px;
  font-size: 0.4em;
  letter-spacing: 0.06em;
  color: var(--text-2);
}

.page-faq .faq-fact__label {
  display: block;
  margin-top: 9px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--text-2);
}

.page-faq .faq-hero__media {
  position: relative;
}

.page-faq .faq-hero__media::before {
  content: "";
  position: absolute;
  inset: 14px -14px -14px 14px;
  border: 1px solid var(--line);
  clip-path: var(--cut-sm);
  pointer-events: none;
}

.page-faq .faq-hero__media .media-frame {
  position: relative;
  max-width: 100%;
}

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

@media (min-width: 920px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  position: relative;
  display: grid;
  gap: var(--faq-gap);
  padding-top: clamp(32px, 5vw, 62px);
}

/* ---------- 分组索引 ---------- */
.page-faq .faq-index {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.page-faq .faq-index__cap {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-3);
}

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

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 11px 12px;
  border-left: 2px solid transparent;
  color: var(--text-2);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-index__link b {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-3);
  transition: color 0.2s var(--ease);
}

.page-faq .faq-index__link em {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 12px;
  color: var(--text-3);
  transition: color 0.2s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--text);
  background: var(--faq-accent-soft);
}

.page-faq .faq-index__link[aria-current="true"] {
  border-left-color: var(--mint);
  background: var(--faq-accent-soft);
  color: var(--text);
}

.page-faq .faq-index__link[aria-current="true"] b,
.page-faq .faq-index__link[aria-current="true"] em {
  color: var(--mint);
}

@media (max-width: 999px) {
  .page-faq .faq-index__list {
    grid-auto-flow: column;
    grid-auto-columns: max-content;
    gap: 6px;
    overflow-x: auto;
    padding-bottom: 8px;
    scrollbar-width: thin;
  }

  .page-faq .faq-index__link {
    border-left: 0;
    border-bottom: 2px solid transparent;
    padding: 9px 12px;
    white-space: nowrap;
  }

  .page-faq .faq-index__link[aria-current="true"] {
    border-left-color: transparent;
    border-bottom-color: var(--mint);
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: 246px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 26px;
    border-top: 0;
    padding-top: 0;
  }
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  padding-bottom: clamp(30px, 4.6vw, 56px);
  scroll-margin-top: 96px;
}

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

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 14px;
  align-items: baseline;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(1.3rem, 3vw, 1.9rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-group__lead {
  grid-column: 1 / -1;
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-2);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-item {
  position: relative;
  margin: 0 0 10px;
  border: 1px solid var(--line);
  background: var(--ink-800);
  clip-path: var(--cut-sm);
  transition: border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-faq .faq-item:last-of-type {
  margin-bottom: 0;
}

.page-faq .faq-item[open] {
  border-color: rgba(46, 230, 168, 0.52);
  background: var(--ink-700);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: var(--faq-pad);
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .faq-item__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-3);
}

.page-faq .faq-item__title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(15px, 2.1vw, 17px);
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
  transition: color 0.2s var(--ease);
}

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

.page-faq .faq-item__mark {
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--text-3);
  border-bottom: 2px solid var(--text-3);
  transform: rotate(45deg);
  transition: transform 0.26s var(--ease), border-color 0.22s var(--ease);
}

.page-faq .faq-item[open] .faq-item__mark {
  border-color: var(--mint);
  transform: rotate(225deg);
}

.page-faq .faq-item__a {
  padding: 0 var(--faq-pad) calc(var(--faq-pad) + 6px) calc(var(--faq-pad) + 42px);
  color: var(--text-2);
  font-size: 15.5px;
  line-height: 1.78;
}

.page-faq .faq-item__a p {
  margin: 0 0 12px;
  max-width: 66ch;
}

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

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

.page-faq .faq-item__a a:hover {
  color: var(--yellow);
}

.page-faq .faq-item__a strong {
  color: var(--text);
  font-weight: 600;
}

.page-faq .faq-item__figure {
  margin: 4px 0 16px;
}

.page-faq .faq-item__figure .media-frame {
  max-width: 540px;
}

.page-faq .faq-item__figure figcaption {
  margin-top: 10px;
  max-width: 52ch;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-3);
}

.page-faq .faq-svg {
  display: block;
  width: 100%;
  max-width: 440px;
  height: auto;
  margin: 6px 0 10px;
}

/* ---------- 收束带 ---------- */
.page-faq .faq-cta {
  position: relative;
  margin-top: clamp(22px, 4vw, 48px);
  padding: clamp(46px, 6.4vw, 78px) 0 clamp(38px, 5.4vw, 64px);
  background: linear-gradient(102deg, rgba(46, 230, 168, 0.2) 0%, rgba(255, 122, 26, 0.13) 56%, rgba(5, 7, 14, 0) 100%);
  clip-path: polygon(0 22px, 100% 0, 100% 100%, 0 calc(100% - 22px));
}

.page-faq .faq-cta__inner {
  display: grid;
  gap: 20px;
  align-items: center;
}

.page-faq .faq-cta__text {
  margin: 0;
  max-width: 50ch;
  font-size: clamp(16px, 2.2vw, 19px);
  line-height: 1.62;
  color: var(--text);
}

@media (min-width: 760px) {
  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 32px;
  }

  .page-faq .faq-cta .btn {
    justify-self: end;
  }
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 640px) {
  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    row-gap: 18px;
  }

  .page-faq .faq-item__a {
    padding-left: var(--faq-pad);
  }

  .page-faq .faq-item__q {
    gap: 10px;
  }

  .page-faq .faq-item__num {
    display: none;
  }

  .page-faq .faq-hero__media::before {
    display: none;
  }
}

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