.page-faq {
  --faq-line: rgba(184, 199, 218, .16);
  --faq-line-cyan: rgba(57, 242, 224, .42);
  --faq-surface: rgba(10, 27, 49, .62);
  --faq-surface-2: rgba(16, 42, 74, .78);
  background: var(--ys-ink-900);
  color: var(--ys-cream);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--ys-header-h) + 36px) 0 52px;
  background:
    radial-gradient(820px 480px at 88% -12%, rgba(57, 242, 224, .18), transparent 62%),
    radial-gradient(640px 420px at 2% 108%, rgba(255, 107, 53, .16), transparent 64%),
    var(--ys-ink-900);
}

.page-faq .faq-hero__ornament {
  position: absolute;
  top: -170px;
  right: -170px;
  width: 430px;
  height: 430px;
  border-radius: 50%;
  border: 1px solid rgba(57, 242, 224, .18);
  background: radial-gradient(circle at 34% 30%, rgba(57, 242, 224, .12), transparent 66%);
  pointer-events: none;
}

.page-faq .faq-hero__slice {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(57, 242, 224, .55), rgba(255, 107, 53, .4), transparent);
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  gap: 30px;
  margin-top: 30px;
}

.page-faq .faq-hero__title {
  margin: 12px 0 18px;
  font-size: clamp(2.3rem, 7.6vw, 4.4rem);
  line-height: 1.06;
  font-weight: 900;
  letter-spacing: -.02em;
}

.page-faq .faq-hero__title em {
  font-style: normal;
  color: var(--ys-cyan);
}

.page-faq .faq-hero__lede {
  max-width: 48ch;
  color: var(--ys-mist);
}

.page-faq .faq-hero__panel {
  border: 1px solid var(--faq-line);
  border-radius: var(--ys-radius-lg);
  padding: 20px;
  background: linear-gradient(155deg, var(--faq-surface-2), rgba(6, 16, 31, .86));
  box-shadow: 0 28px 64px -44px rgba(0, 0, 0, .95);
}

.page-faq .faq-hero__panel-label {
  margin: 0 0 14px;
  font-family: var(--ys-font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--ys-cyan-soft);
}

.page-faq .faq-hero__panel-note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--faq-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--ys-mist);
}

.page-faq .faq-chips {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: var(--ys-radius-pill);
  border: 1px solid var(--faq-line);
  background: rgba(6, 16, 31, .5);
  color: var(--ys-cream);
  font-size: 14px;
  text-decoration: none;
  transition: border-color .22s var(--ys-ease), background .22s var(--ys-ease), transform .22s var(--ys-ease);
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  border-color: var(--faq-line-cyan);
  background: rgba(16, 42, 74, .85);
  transform: translateY(-2px);
}

.page-faq .faq-chip__num {
  font-family: var(--ys-font-mono);
  font-size: 12px;
  color: var(--ys-orange);
}

/* ---------- 两栏主体 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: 26px;
  padding: 44px 0 72px;
}

.page-faq .faq-index {
  border: 1px solid var(--faq-line);
  border-radius: var(--ys-radius-lg);
  background: var(--faq-surface);
  padding: 16px 18px;
}

.page-faq .faq-index__title {
  margin: 0;
  font-family: var(--ys-font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--ys-cyan-soft);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--ys-radius-pill);
  border: 1px solid transparent;
  color: var(--ys-mist);
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  transition: color .2s var(--ys-ease), background .2s var(--ys-ease), border-color .2s var(--ys-ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--ys-cream);
  border-color: var(--faq-line-cyan);
}

.page-faq .faq-index__link[aria-current="true"] {
  color: var(--ys-ink-900);
  background: var(--ys-cyan);
  border-color: var(--ys-cyan);
  font-weight: 700;
}

.page-faq .faq-index__num {
  font-family: var(--ys-font-mono);
  font-size: 12px;
  color: var(--ys-orange);
}

.page-faq .faq-index__link[aria-current="true"] .faq-index__num {
  color: var(--ys-ink-900);
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  margin-bottom: 50px;
  scroll-margin-top: calc(var(--ys-header-h) + 24px);
}

.page-faq .faq-section:last-of-type {
  margin-bottom: 36px;
}

.page-faq .faq-section__head {
  display: grid;
  gap: 8px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--faq-line);
  margin-bottom: 20px;
}

.page-faq .faq-section__num {
  font-family: var(--ys-font-mono);
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--ys-orange);
}

.page-faq .faq-section__head h2 {
  margin: 0;
  font-size: clamp(1.6rem, 4.4vw, 2.35rem);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ys-cream);
}

.page-faq .faq-section__intro {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ys-mist);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  border: 1px solid var(--faq-line);
  border-radius: var(--ys-radius-md);
  background: rgba(10, 27, 49, .55);
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color .24s var(--ys-ease), background .24s var(--ys-ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(57, 242, 224, .3);
}

.page-faq .faq-item[open] {
  border-color: var(--faq-line-cyan);
  background: var(--faq-surface-2);
}

.page-faq .faq-item__summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 16px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__num {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ys-cyan);
}

.page-faq .faq-item__q {
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ys-cream);
}

.page-faq .faq-item__icon {
  position: relative;
  width: 26px;
  height: 26px;
  flex: none;
  border-radius: 50%;
  border: 1px solid var(--faq-line-cyan);
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--ys-cyan);
  transform: translate(-50%, -50%);
  transition: transform .24s var(--ys-ease), opacity .24s var(--ys-ease);
}

.page-faq .faq-item__icon::before {
  width: 11px;
  height: 1.5px;
}

.page-faq .faq-item__icon::after {
  width: 1.5px;
  height: 11px;
}

.page-faq .faq-item[open] .faq-item__icon::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-item[open] .faq-item__icon::before {
  background: var(--ys-orange);
}

.page-faq .faq-item__body {
  padding: 0 16px 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ys-mist);
}

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

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

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

.page-faq .faq-steps {
  list-style: none;
  margin: 12px 0 14px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 10px;
  align-items: start;
  font-size: 14.5px;
  line-height: 1.7;
}

.page-faq .faq-steps li > span:first-child {
  font-family: var(--ys-font-mono);
  color: var(--ys-orange);
}

.page-faq .faq-tip {
  margin-top: 6px;
  padding: 12px 14px;
  border-left: 3px solid var(--ys-orange);
  border-radius: 0 var(--ys-radius-md) var(--ys-radius-md) 0;
  background: rgba(255, 107, 53, .1);
  color: var(--ys-orange-soft);
  font-size: 14px;
  line-height: 1.7;
}

/* ---------- 联系卡 ---------- */
.page-faq .faq-contact {
  margin-top: 16px;
  display: grid;
  gap: 14px;
  padding: 18px;
  border-radius: var(--ys-radius-lg);
  border: 1px solid var(--faq-line-cyan);
  background: linear-gradient(150deg, rgba(16, 42, 74, .9), rgba(6, 16, 31, .92));
}

.page-faq .faq-contact .ys-contact__label {
  display: block;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--ys-cyan-soft);
  margin-bottom: 6px;
}

.page-faq .faq-contact .ys-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-faq .faq-contact .ys-contact__value {
  font-family: var(--ys-font-mono);
  font-size: 15px;
  color: var(--ys-cream);
  word-break: break-all;
}

.page-faq .faq-copy {
  border: 1px solid var(--faq-line-cyan);
  border-radius: var(--ys-radius-pill);
  background: transparent;
  color: var(--ys-cyan);
  font-size: 12px;
  padding: 5px 12px;
  cursor: pointer;
  transition: background .2s var(--ys-ease), color .2s var(--ys-ease);
}

.page-faq .faq-copy:hover,
.page-faq .faq-copy:focus-visible {
  background: var(--ys-cyan);
  color: var(--ys-ink-900);
}

.page-faq .faq-copy[data-copied="true"] {
  border-color: var(--ys-orange);
  color: var(--ys-orange-soft);
  background: rgba(255, 107, 53, .12);
}

.page-faq .faq-contact__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ys-mist);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 24px 0 0;
}

.page-faq .faq-figure .ys-media {
  border-radius: var(--ys-radius-lg);
  border: 1px solid var(--faq-line);
  overflow: hidden;
  background: linear-gradient(150deg, var(--ys-ink-700), var(--ys-ink-900));
}

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

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

/* ---------- 收尾 ---------- */
.page-faq .faq-cta {
  display: grid;
  gap: 16px;
  margin-top: 8px;
  padding: 24px 20px;
  border-radius: var(--ys-radius-xl);
  border: 1px solid var(--faq-line);
  background:
    radial-gradient(420px 220px at 92% 0%, rgba(57, 242, 224, .14), transparent 68%),
    linear-gradient(160deg, var(--faq-surface-2), rgba(6, 16, 31, .9));
}

.page-faq .faq-cta__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ys-cream);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero {
    padding-top: calc(var(--ys-header-h) + 56px);
    padding-bottom: 64px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .85fr);
    align-items: end;
    gap: 44px;
  }

  .page-faq .faq-item__summary {
    padding: 18px 22px;
    gap: 16px;
  }

  .page-faq .faq-item__q {
    font-size: 16.5px;
  }

  .page-faq .faq-item__body {
    padding: 0 22px 20px;
  }

  .page-faq .faq-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding: 22px;
  }

  .page-faq .faq-contact__note {
    grid-column: 1 / -1;
    padding-top: 12px;
    border-top: 1px solid var(--faq-line);
  }

  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 30px 32px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-body {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 56px;
    padding-top: 60px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--ys-header-h) + 24px);
    padding: 20px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    margin-top: 14px;
  }

  .page-faq .faq-index__link {
    width: 100%;
    border-radius: var(--ys-radius-md);
    white-space: normal;
  }
}