.page-faq {
  --faq-glass: rgba(247, 241, 229, 0.055);
  --faq-glass-2: rgba(247, 241, 229, 0.1);
  --faq-on-paper: rgba(11, 18, 32, 0.78);
  --faq-link-paper: #0E7C72;
  --faq-gap: 16px;
  color: var(--c28-paper);
  overflow-x: clip;
}

.page-faq .faq-wrap {
  padding-top: 18px;
  padding-bottom: 56px;
}

/* 面包屑 */
.page-faq .faq-crumb {
  margin-bottom: 18px;
}

/* 首屏框景 */
.page-faq .faq-hero {
  position: relative;
  display: grid;
  gap: 24px;
  padding: 26px 18px 28px;
  border: 1px solid var(--c28-hair);
  border-radius: var(--c28-radius);
  background:
    radial-gradient(120% 100% at 100% 0%, rgba(57, 224, 208, 0.13), transparent 58%),
    radial-gradient(90% 80% at 0% 100%, rgba(230, 184, 92, 0.1), transparent 60%),
    var(--c28-ink-2);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 7px;
  background-image: repeating-linear-gradient(90deg, var(--c28-hair-strong) 0 1px, transparent 1px 18px);
  opacity: 0.75;
  pointer-events: none;
}

.page-faq .faq-hero__eyebrow {
  margin: 0 0 12px;
}

.page-faq .faq-hero__title {
  margin: 0;
  font-size: clamp(1.9rem, 7.4vw, 3.3rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--c28-paper);
}

.page-faq .faq-hero__lede {
  max-width: 60ch;
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c28-text-dim);
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 14px;
  margin: 24px 0 0;
  padding: 0;
}

.page-faq .faq-hero__stat {
  min-width: 0;
  padding-left: 11px;
  border-left: 2px solid var(--c28-cyan);
}

.page-faq .faq-hero__stat dt {
  font-family: var(--c28-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c28-slate);
  color: rgba(247, 241, 229, 0.55);
}

.page-faq .faq-hero__stat dd {
  margin: 5px 0 0;
  font-size: 14px;
  line-height: 1.5;
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-hero__num {
  font-family: var(--c28-mono);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--c28-paper);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--c28-hair);
  border-radius: var(--c28-radius-sm);
  overflow: hidden;
  background: var(--c28-ink-3);
}

.page-faq .faq-hero__media .c28-media__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* 主体双栏 */
.page-faq .faq-body {
  display: grid;
  gap: 28px;
  margin-top: 38px;
}

/* 侧栏索引 */
.page-faq .faq-side {
  min-width: 0;
}

.page-faq .faq-side__title {
  margin: 0 0 10px;
  font-family: var(--c28-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c28-gold);
}

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

.page-faq .faq-side__nav li {
  flex: 0 0 auto;
}

.page-faq .faq-side__nav a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--c28-hair);
  border-radius: 999px;
  background: var(--faq-glass);
  color: var(--c28-paper);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.22s var(--c28-ease), background 0.22s var(--c28-ease), transform 0.22s var(--c28-ease);
}

.page-faq .faq-side__nav a:hover,
.page-faq .faq-side__nav a:focus-visible {
  border-color: var(--c28-cyan);
  background: var(--faq-glass-2);
  transform: translateY(-2px);
}

.page-faq .faq-side__no {
  font-family: var(--c28-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--c28-cyan);
}

.page-faq .faq-side__note {
  position: relative;
  margin-top: 20px;
  padding: 6px 0 6px 14px;
  border-left: 2px solid var(--c28-gold);
  font-size: 13px;
  line-height: 1.7;
  color: var(--c28-text-dim);
}

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

.page-faq .faq-side__note-title {
  margin-bottom: 6px !important;
  font-family: var(--c28-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c28-gold);
}

/* 章节 */
.page-faq .faq-stream {
  min-width: 0;
}

.page-faq .faq-chapter {
  min-width: 0;
  margin-bottom: 44px;
  scroll-margin-top: 96px;
}

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

.page-faq .faq-chapter__head {
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--c28-hair);
}

.page-faq .faq-chapter__head .c28-eyebrow {
  margin: 0 0 8px;
}

.page-faq .faq-chapter__head .c28-heading {
  margin: 0;
}

.page-faq .faq-chapter__desc {
  max-width: 64ch;
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c28-text-dim);
}

/* 问答列 */
.page-faq .faq-cols {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-col {
  display: grid;
  gap: var(--faq-gap);
  align-content: start;
  min-width: 0;
}

.page-faq .faq-item {
  min-width: 0;
  border: 1px solid var(--c28-hair);
  border-radius: var(--c28-radius-sm);
  background: var(--faq-glass);
  backdrop-filter: blur(8px);
  transition: background 0.24s var(--c28-ease), border-color 0.24s var(--c28-ease), transform 0.24s var(--c28-ease);
}

.page-faq .faq-item:hover {
  border-color: var(--c28-hair-strong);
  transform: translateY(-2px);
}

.page-faq .faq-item[open] {
  background: var(--c28-paper);
  border-color: var(--c28-paper);
  color: var(--c28-ink);
  transform: none;
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  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(--c28-cyan);
  outline-offset: 2px;
  border-radius: var(--c28-radius-sm);
}

.page-faq .faq-item__no {
  font-family: var(--c28-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c28-cyan);
}

.page-faq .faq-item[open] .faq-item__no {
  color: var(--faq-link-paper);
}

.page-faq .faq-item__text {
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  letter-spacing: -0.01em;
}

.page-faq .faq-item__icon {
  position: relative;
  width: 14px;
  height: 14px;
  flex: 0 0 auto;
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  background: var(--c28-gold);
  border-radius: 1px;
}

.page-faq .faq-item__icon::before {
  inset: 6px 0;
}

.page-faq .faq-item__icon::after {
  inset: 0 6px;
  transition: transform 0.24s var(--c28-ease);
}

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

.page-faq .faq-item__a {
  padding: 12px 16px 18px;
  border-top: 1px solid rgba(11, 18, 32, 0.14);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--faq-on-paper);
}

.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(--faq-link-paper);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--c28-coral);
}

/* 章节插图 */
.page-faq .faq-figure {
  margin: 22px 0 0;
  border: 1px solid var(--c28-hair);
  border-radius: var(--c28-radius-sm);
  overflow: hidden;
  background: var(--c28-ink-3);
}

.page-faq .faq-figure .c28-media__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
}

/* 仍然需要帮助 */
.page-faq .faq-chapter--help {
  padding: 22px 18px 24px;
  border: 1px solid var(--c28-hair);
  border-radius: var(--c28-radius);
  background:
    linear-gradient(180deg, rgba(255, 107, 74, 0.08), transparent 46%),
    var(--c28-ink-2);
}

.page-faq .faq-chapter--help .faq-chapter__head {
  border-bottom-color: rgba(255, 107, 74, 0.28);
}

.page-faq .faq-help {
  display: grid;
  gap: 14px;
}

.page-faq .faq-help__card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--c28-hair);
  border-radius: var(--c28-radius-sm);
  background: var(--faq-glass);
}

.page-faq .faq-help__card--primary {
  border-color: rgba(255, 107, 74, 0.5);
  background: rgba(255, 107, 74, 0.09);
}

.page-faq .faq-help__label {
  margin: 0;
  font-family: var(--c28-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c28-gold);
}

.page-faq .faq-help__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-faq .faq-help__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c28-text-dim);
}

.page-faq .faq-help__key {
  margin: 0;
  font-family: var(--c28-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--c28-cyan);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-faq .faq-help__addr {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c28-paper);
}

.page-faq .faq-help__btn {
  align-self: flex-start;
  margin-top: 6px;
}

/* 平板 */
@media (min-width: 720px) {
  .page-faq .faq-wrap {
    padding-top: 24px;
    padding-bottom: 72px;
  }

  .page-faq .faq-hero {
    padding: 34px 30px 36px;
  }

  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-help {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* 桌面：非对称双栏，左侧粘性索引 */
@media (min-width: 1000px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: stretch;
    gap: 32px;
    padding: 40px 38px 42px;
  }

  .page-faq .faq-hero__frame {
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .page-faq .faq-hero__media {
    align-self: stretch;
  }

  .page-faq .faq-hero__media .c28-media__img {
    height: 100%;
    aspect-ratio: auto;
    min-height: 280px;
  }

  .page-faq .faq-body {
    grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
    gap: 44px;
    margin-top: 52px;
  }

  .page-faq .faq-side {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-side__nav ol {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-side__nav a {
    display: flex;
    width: 100%;
    justify-content: flex-start;
    padding: 9px 12px;
    border-color: transparent;
    border-radius: var(--c28-radius-sm);
    background: transparent;
    font-size: 14.5px;
  }

  .page-faq .faq-side__nav a:hover,
  .page-faq .faq-side__nav a:focus-visible {
    border-color: var(--c28-hair);
    background: var(--faq-glass);
  }

  .page-faq .faq-chapter {
    margin-bottom: 56px;
  }

  .page-faq .faq-chapter--help {
    padding: 30px 28px 32px;
  }

  .page-faq .faq-help {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-cols {
    gap: 18px;
    column-gap: 22px;
  }

  .page-faq .faq-item__q {
    padding: 17px 18px;
  }

  .page-faq .faq-item__a {
    padding: 14px 18px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-side__nav a,
  .page-faq .faq-item__icon::after {
    transition: none;
  }

  .page-faq .faq-item:hover,
  .page-faq .faq-side__nav a:hover {
    transform: none;
  }
}