.page-faq {
  --faq-rail-w: 320px;
  --faq-stripe: repeating-linear-gradient(135deg, rgba(0, 233, 255, .05) 0 6px, rgba(0, 233, 255, 0) 6px 14px);
  position: relative;
  padding-top: clamp(20px, 3vw, 40px);
  padding-bottom: clamp(56px, 8vw, 104px);
  color: var(--slate-text);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-bottom: clamp(30px, 5vw, 58px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -190px;
  right: -130px;
  width: min(660px, 80vw);
  height: min(660px, 80vw);
  background: radial-gradient(circle at 50% 50%, rgba(0, 233, 255, .22), rgba(139, 92, 246, .14) 44%, transparent 70%);
  filter: blur(26px);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: -10%;
  bottom: -46px;
  width: 58%;
  height: 170px;
  background: linear-gradient(100deg, rgba(255, 106, 31, .12), rgba(0, 233, 255, .08) 48%, transparent 78%);
  transform: skewX(-30deg);
  pointer-events: none;
}

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

.page-faq .breadcrumbs {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  max-width: 20em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(29px, 5vw, 56px);
  line-height: 1.14;
  letter-spacing: .015em;
  color: var(--ink-strong);
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.85;
  color: var(--slate-text);
}

.page-faq .faq-facts {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

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

.page-faq .faq-fact {
  padding: 18px clamp(14px, 2vw, 22px);
  background: linear-gradient(180deg, rgba(28, 37, 89, .74), rgba(18, 26, 69, .88));
}

.page-faq .faq-fact__num {
  display: block;
  font-size: clamp(23px, 3.2vw, 34px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: .02em;
  color: var(--electric-cyan);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-fact--warm .faq-fact__num {
  color: var(--neon-orange);
}

.page-faq .faq-fact__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted-gray-blue);
}

/* ---------- 场景图示 ---------- */
.page-faq .faq-overview {
  padding-top: clamp(34px, 5vw, 62px);
}

.page-faq .faq-overview__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--indigo-core);
}

.page-faq .faq-overview__figure .figure__caption {
  margin-top: 12px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted-gray-blue);
}

/* ---------- 两栏结构 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(28px, 4vw, 46px);
  padding-top: clamp(42px, 6vw, 76px);
}

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

.page-faq .faq-rail {
  display: grid;
  gap: 16px;
}

@media (min-width: 1000px) {
  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}

.page-faq .faq-rail__box {
  padding: clamp(16px, 2vw, 22px);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: linear-gradient(158deg, rgba(28, 37, 89, .84), rgba(7, 11, 36, .74));
}

.page-faq .faq-rail__label {
  display: block;
  margin: 0 0 14px;
  padding-bottom: 9px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted-gray-blue);
}

.page-faq .faq-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

@media (min-width: 1000px) {
  .page-faq .faq-chips {
    flex-direction: column;
    flex-wrap: nowrap;
  }
}

.page-faq .faq-chip {
  display: block;
  padding: 9px 15px;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.4;
  color: var(--slate-text);
  text-decoration: none;
  transition: background .25s var(--ease-out), color .25s var(--ease-out), border-color .25s var(--ease-out);
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  border-color: var(--electric-cyan);
  color: var(--ink-strong);
}

.page-faq .faq-chip.is-active {
  border-color: var(--electric-cyan);
  background: var(--electric-cyan);
  color: #04121f;
  font-weight: 700;
}

.page-faq .faq-filter {
  display: block;
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(7, 11, 36, .74);
  color: var(--ink-strong);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  transition: border-color .2s var(--ease-out), box-shadow .2s var(--ease-out);
}

.page-faq .faq-filter::placeholder {
  color: var(--muted-gray-blue);
}

.page-faq .faq-filter:focus {
  outline: none;
  border-color: var(--electric-cyan);
  box-shadow: 0 0 0 2px rgba(0, 233, 255, .38), 0 0 22px rgba(0, 233, 255, .26);
}

.page-faq .faq-filter__hint {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted-gray-blue);
}

.page-faq .faq-filter__empty {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--alert-amber);
}

.page-faq .faq-rail__box--help {
  background: linear-gradient(150deg, rgba(255, 106, 31, .18), rgba(139, 92, 246, .16));
}

.page-faq .faq-rail__box--help p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--slate-text);
}

.page-faq .faq-rail__box--help .btn {
  display: block;
  width: 100%;
  text-align: center;
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-groups {
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 26px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(40px, 6vw, 72px);
  padding-top: clamp(30px, 5vw, 54px);
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2vw, 24px);
  align-items: start;
  margin-bottom: clamp(18px, 2.5vw, 28px);
}

.page-faq .faq-group__index {
  font-size: clamp(32px, 4.4vw, 54px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--electric-cyan);
  opacity: .55;
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 2.7vw, 30px);
  line-height: 1.3;
  letter-spacing: .03em;
  color: var(--ink-strong);
}

.page-faq .faq-group__lead {
  margin: 9px 0 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--slate-text);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 12px;
}

.page-faq .faq-item {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: linear-gradient(152deg, rgba(28, 37, 89, .62), rgba(7, 11, 36, .52));
  overflow: hidden;
  transition: border-color .25s var(--ease-out), box-shadow .25s var(--ease-out);
}

.page-faq .faq-item[open] {
  border-color: var(--line);
  box-shadow: 0 20px 44px -30px rgba(0, 233, 255, .8);
}

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: clamp(15px, 2.1vw, 21px) clamp(16px, 2.4vw, 26px);
  font-size: clamp(15.5px, 1.5vw, 17px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink-strong);
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .faq-item__mark {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--line);
  border-radius: 9px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
  color: var(--electric-cyan);
  transition: background .2s var(--ease-out), border-color .2s var(--ease-out);
}

.page-faq .faq-item__mark::before {
  content: "+";
}

.page-faq .faq-item[open] .faq-item__mark {
  border-color: var(--electric-cyan);
  background: rgba(0, 233, 255, .14);
}

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

.page-faq .faq-item__a {
  position: relative;
  padding: 2px clamp(18px, 2.4vw, 26px) clamp(17px, 2.3vw, 23px) clamp(22px, 2.8vw, 34px);
  background: var(--faq-stripe);
  font-size: 15.5px;
  line-height: 1.86;
  color: var(--slate-text);
}

.page-faq .faq-item__a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--electric-cyan), rgba(139, 92, 246, .55));
}

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

.page-faq .faq-item__a p + p {
  margin-top: 10px;
}

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

.page-faq .faq-inline-figure {
  margin: 4px 0;
}

.page-faq .faq-inline-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--indigo-core);
}

.page-faq .faq-inline-figure .figure__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted-gray-blue);
}

/* ---------- 联系区块 ---------- */
.page-faq .faq-contact-band {
  position: relative;
  overflow: hidden;
  margin-top: clamp(22px, 3vw, 34px);
  padding: clamp(22px, 3vw, 34px);
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(118deg, rgba(0, 233, 255, .14), rgba(139, 92, 246, .16) 46%, rgba(255, 106, 31, .14));
}

@media (min-width: 760px) {
  .page-faq .faq-contact-band {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: center;
  }
}

.page-faq .faq-contact-band h3 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.4vw, 26px);
  line-height: 1.36;
  letter-spacing: .02em;
  color: var(--ink-strong);
}

.page-faq .faq-contact-band__text p {
  margin: 10px 0 18px;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate-text);
}

.page-faq .faq-contact-band__list {
  list-style: none;
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
}

.page-faq .faq-contact-band__list li {
  display: grid;
  gap: 4px;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(7, 11, 36, .68);
}

.page-faq .faq-contact-band__list span {
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted-gray-blue);
}

.page-faq .faq-contact-band__list strong {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink-strong);
  overflow-wrap: anywhere;
}

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