/* ===== 答疑中心 /answers/ ===== */
.page-faq {
  --faq-cat-w: 232px;
  --faq-ease: cubic-bezier(0.4, 0, 0.2, 1);
  display: block;
  background: var(--ink-800);
  color: var(--text);
  font-family: var(--font-body);
}

/* --- 页头 --- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 4.5vw, 54px) var(--gutter) clamp(30px, 5vw, 72px);
  background:
    var(--scene-light),
    linear-gradient(180deg, var(--ink-800) 0%, var(--ink-800) 55%, var(--ink-900) 100%);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-hero__grid {
  max-width: var(--shell-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 52px);
  align-items: center;
}

@media (min-width: 1000px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
  }
}

.page-faq .faq-hero__text {
  min-width: 0;
}

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

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.01em;
  font-size: clamp(28px, 5.2vw, 56px);
  line-height: 1.12;
  max-width: 20ch;
}

.page-faq .faq-hero__lead {
  margin: 16px 0 0;
  max-width: 48ch;
  font-size: clamp(14px, 1.6vw, 16px);
  line-height: 1.78;
  color: var(--text-dim);
}

.page-faq .faq-hero__meta {
  list-style: none;
  margin: 24px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
}

.page-faq .faq-hero__meta li {
  display: grid;
  gap: 2px;
}

.page-faq .faq-hero__meta b {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(19px, 2.4vw, 25px);
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-faq .faq-hero__meta span {
  font-size: 12px;
  color: var(--text-dim);
}

.page-faq .faq-hero__media {
  margin: 0;
  position: relative;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-900);
  box-shadow: 0 24px 60px rgba(5, 7, 15, 0.55);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 3;
  object-fit: cover;
}

/* --- 双栏骨架 --- */
.page-faq .faq-layout {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: clamp(28px, 4.5vw, 64px) var(--gutter) clamp(56px, 7vw, 112px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 56px);
  align-items: start;
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-cat-w) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
  }
}

.page-faq .faq-body {
  min-width: 0;
}

/* --- 左侧分类 --- */
.page-faq .faq-cats {
  min-width: 0;
}

@media (min-width: 1024px) {
  .page-faq .faq-cats {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    border-left: 1px solid var(--line);
    padding-left: 18px;
  }
}

.page-faq .faq-cats__title {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.page-faq .faq-cats__list {
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-cats__list > li {
  flex: none;
  scroll-snap-align: start;
}

@media (min-width: 1024px) {
  .page-faq .faq-cats__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-cats__list > li {
    flex: initial;
    width: 100%;
  }
}

.page-faq .faq-cats__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text-dim);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition:
    color 0.18s var(--faq-ease),
    border-color 0.18s var(--faq-ease),
    background-color 0.18s var(--faq-ease);
}

.page-faq .faq-cats__link:hover,
.page-faq .faq-cats__link:focus-visible {
  color: var(--text);
  border-color: var(--glass-border);
  background: var(--glass);
}

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

@media (min-width: 1024px) {
  .page-faq .faq-cats__link {
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    padding: 10px 12px 10px 14px;
    white-space: normal;
    line-height: 1.5;
  }

  .page-faq .faq-cats__link:hover,
  .page-faq .faq-cats__link:focus-visible {
    border-left-color: var(--cyan);
    background: var(--glass);
    color: var(--text);
  }
}

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

.page-faq .faq-cats__name {
  min-width: 0;
}

/* --- 分类章节 --- */
.page-faq .faq-cat {
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.page-faq .faq-cat + .faq-cat {
  margin-top: clamp(48px, 6vw, 96px);
}

.page-faq .faq-cat__head {
  position: relative;
  padding-top: 20px;
}

.page-faq .faq-cat__head::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan) 0%, rgba(124, 140, 255, 0.35) 34%, transparent 80%);
}

.page-faq .faq-cat__no {
  display: block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(28px, 5vw, 48px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: rgba(124, 140, 255, 0.55);
}

.page-faq .faq-cat__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.01em;
  font-size: clamp(21px, 3vw, 31px);
  line-height: 1.22;
}

.page-faq .faq-cat__desc {
  margin: 10px 0 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.78;
  color: var(--text-dim);
}

/* --- 章节配图 --- */
.page-faq .faq-figure {
  margin: clamp(20px, 3vw, 30px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-700);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  padding: 11px 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 12px;
  line-height: 1.65;
  color: var(--text-dim);
}

/* --- 问答条目 --- */
.page-faq .faq-list {
  margin: clamp(20px, 3vw, 30px) 0 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-700);
  overflow: hidden;
  transition:
    border-color 0.2s var(--faq-ease),
    background-color 0.2s var(--faq-ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(0, 229, 199, 0.32);
}

.page-faq .faq-item[open] {
  border-color: var(--glass-border);
  background:
    linear-gradient(180deg, rgba(0, 229, 199, 0.07), rgba(0, 229, 199, 0) 62%),
    var(--ink-700);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.55;
  color: var(--text);
  transition: color 0.18s var(--faq-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__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  line-height: inherit;
}

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

.page-faq .faq-item__icon {
  width: 24px;
  height: 24px;
  margin-top: 1px;
  display: grid;
  place-items: center;
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  background: var(--glass);
  color: var(--cyan);
  transition:
    transform 0.22s var(--faq-ease),
    background-color 0.22s var(--faq-ease),
    color 0.22s var(--faq-ease),
    border-color 0.22s var(--faq-ease);
}

.page-faq .faq-item[open] .faq-item__icon {
  transform: rotate(45deg);
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-900);
}

.page-faq .faq-item__a {
  padding: 0 16px 18px;
  max-width: 78ch;
  font-size: 14px;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
}

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

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 199, 0.4);
}

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

.page-faq .faq-item[open] .faq-item__a {
  animation: faq-panel-in 0.24s var(--faq-ease) both;
}

@keyframes faq-panel-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- 兜底联系块 --- */
.page-faq .faq-help {
  margin-top: clamp(20px, 3vw, 30px);
  padding: clamp(20px, 3.4vw, 38px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  background:
    radial-gradient(600px 320px at 92% -12%, var(--orange-wash), transparent 66%),
    linear-gradient(160deg, rgba(0, 229, 199, 0.08), rgba(0, 229, 199, 0) 58%),
    var(--ink-700);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

@media (min-width: 860px) {
  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.84fr);
    align-items: start;
  }
}

.page-faq .faq-help__text {
  min-width: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-faq .faq-help__text p {
  margin: 0 0 12px;
  max-width: 54ch;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.page-faq .faq-help__rows {
  min-width: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-help__row {
  display: grid;
  gap: 3px;
  padding-bottom: 11px;
  border-bottom: 1px dashed var(--line);
}

.page-faq .faq-help__key {
  font-family: var(--font-serif);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.page-faq .faq-help__val {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--text);
  word-break: break-word;
}

.page-faq .faq-help__note {
  margin: 2px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* --- 动效降级 --- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__icon,
  .page-faq .faq-cats__link {
    transition: none;
  }

  .page-faq .faq-item[open] .faq-item__a {
    animation: none;
  }
}