.page-faq {
  --faq-rail-w: 248px;
  --faq-gap: clamp(32px, 5vw, 72px);
  --faq-anchor: calc(var(--header-nav-h) + 24px);
  background: var(--ink);
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(52px, 8vw, 100px) 0 clamp(36px, 5vw, 60px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 84% -14%, rgba(183, 255, 46, .10), transparent 58%),
    radial-gradient(90% 80% at 6% 0%, rgba(47, 224, 200, .08), transparent 62%),
    var(--ink);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--orange), var(--lime) 42%, transparent 88%);
}

.page-faq .breadcrumbs {
  margin: 0 0 clamp(22px, 3vw, 34px);
}

.page-faq .faq-hero__kicker {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--teal);
}

.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 22ch;
  font-size: clamp(30px, 5.4vw, 62px);
  font-weight: 400;
  line-height: 1.22;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-faq .faq-hero__lead {
  margin: clamp(18px, 2.4vw, 28px) 0 0;
  max-width: 66ch;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.85;
  color: var(--text);
}

.page-faq .faq-hero__quick {
  list-style: none;
  margin: clamp(28px, 4vw, 40px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-hero__quick a {
  display: inline-block;
  padding: 8px 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(11, 42, 74, .55);
  color: var(--text);
  font-size: 14px;
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}

.page-faq .faq-hero__quick a:hover,
.page-faq .faq-hero__quick a:focus-visible {
  color: var(--lime);
  border-color: var(--lime);
  transform: translateY(-2px);
}

/* ---------- 左右对照骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  padding-top: clamp(36px, 5.5vw, 68px);
  padding-bottom: clamp(60px, 10vw, 120px);
}

@media (min-width: 980px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    align-items: start;
  }
}

.page-faq .faq-rail {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

@media (min-width: 980px) {
  .page-faq .faq-rail {
    position: sticky;
    top: var(--faq-anchor);
    border-top: 0;
    padding-top: 0;
  }
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--index);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

@media (min-width: 980px) {
  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }
}

.page-faq .faq-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  color: var(--white);
  border-left-color: var(--orange);
  background: rgba(11, 42, 74, .75);
}

.page-faq .faq-rail__no {
  font-size: 12px;
  color: var(--red);
}

.page-faq .faq-rail__hint {
  display: none;
  margin: 16px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--index);
}

@media (min-width: 980px) {
  .page-faq .faq-rail__hint {
    display: block;
  }
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  margin-bottom: clamp(52px, 8vw, 96px);
  scroll-margin-top: var(--faq-anchor);
}

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

.page-faq .band {
  margin: 0 0 clamp(22px, 3vw, 30px);
}

.page-faq .band__title {
  margin: 0;
}

/* ---------- 判断图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 clamp(22px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
}

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

.page-faq .faq-layers {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

@media (min-width: 720px) {
  .page-faq .faq-layers {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1120px) {
  .page-faq .faq-layers {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-faq .faq-layer {
  background: var(--ink);
  padding: 20px 18px 22px;
}

.page-faq .faq-layer__no {
  display: block;
  margin-bottom: 12px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--lime);
}

.page-faq .faq-layer__name {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 500;
  color: var(--white);
}

.page-faq .faq-layer__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ---------- 问答卡 ---------- */
.page-faq .faq-qa {
  display: grid;
  gap: 10px;
}

.page-faq .faq-item {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background: var(--lime);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .24s var(--ease);
}

.page-faq .faq-item[open] {
  background: var(--paper);
  border-color: var(--paper-soft);
}

.page-faq .faq-item[open]::before {
  transform: scaleX(1);
}

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 17px 18px;
  cursor: pointer;
  list-style: none;
  color: var(--white);
  transition: color .2s var(--ease);
}

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

.page-faq .faq-item > summary:hover,
.page-faq .faq-item > summary:focus-visible {
  color: var(--lime);
}

.page-faq .faq-item[open] > summary {
  color: var(--paper-ink);
}

.page-faq .faq-item[open] > summary:hover,
.page-faq .faq-item[open] > summary:focus-visible {
  color: var(--paper-ink);
}

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

.page-faq .faq-item__no {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--red);
}

.page-faq .faq-item__q {
  font-size: 16px;
  line-height: 1.6;
}

.page-faq .faq-item__sign {
  position: relative;
  width: 14px;
  height: 14px;
  color: currentColor;
  opacity: .8;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  background: currentColor;
}

.page-faq .faq-item__sign::before {
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  transform: translateY(-50%);
}

.page-faq .faq-item__sign::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  transform: translateX(-50%);
  transition: transform .24s var(--ease);
}

.page-faq .faq-item[open] .faq-item__sign::after {
  transform: translateX(-50%) scaleY(0);
}

.page-faq .faq-item__body {
  padding: 0 18px 20px;
  color: var(--paper-ink);
}

.page-faq .faq-item__body p {
  margin: 0;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.85;
}

/* ---------- 两端对照 ---------- */
.page-faq .faq-split {
  display: grid;
  gap: 22px;
  margin-bottom: clamp(22px, 3vw, 30px);
}

@media (min-width: 900px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
    gap: 34px;
  }
}

.page-faq .faq-split__text p {
  margin: 0 0 14px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text);
}

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

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

.page-faq .faq-split__text a:hover,
.page-faq .faq-split__text a:focus-visible {
  color: var(--orange);
}

.page-faq .faq-split__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
}

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

/* ---------- 联系方式区 ---------- */
.page-faq .faq-help {
  display: grid;
  gap: 28px;
  padding: clamp(24px, 4vw, 42px);
  border-radius: var(--radius);
}

@media (min-width: 820px) {
  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 44px;
  }
}

.page-faq .faq-help h3 {
  margin: 0 0 16px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: .04em;
}

.page-faq .faq-help__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-help__list li {
  display: flex;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px solid var(--paper-soft);
  font-size: 14.5px;
  line-height: 1.7;
}

.page-faq .faq-help__list li::before {
  content: "—";
  color: var(--red);
}

.page-faq .faq-help__text {
  margin: 0 0 16px;
  max-width: 46ch;
  font-size: 14.5px;
  line-height: 1.8;
}

.page-faq .faq-help__contact {
  margin: 0 0 22px;
  font-size: 14.5px;
  line-height: 2;
}

.page-faq .faq-help__contact .mono {
  display: inline-block;
  min-width: 3.2em;
  font-size: 12px;
  letter-spacing: .12em;
  opacity: .7;
}

.page-faq .faq-help__contact a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-help__actions {
  margin: 0;
}

.page-faq .faq-help .btn {
  display: inline-block;
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item::before,
  .page-faq .faq-item__sign::after,
  .page-faq .faq-hero__quick a,
  .page-faq .faq-rail__list a,
  .page-faq .faq-item > summary {
    transition: none;
  }

  .page-faq .faq-hero__quick a:hover,
  .page-faq .faq-hero__quick a:focus-visible {
    transform: none;
  }
}