.page-faq {
  --faq-index-w: 216px;
  color: var(--ink);
  background: var(--night);
}

/* ---------- 面包屑留白 ---------- */
.page-faq .faq-crumbs {
  padding-top: calc(var(--header-h) + 20px);
  padding-bottom: 4px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-bottom: 36px;
  background:
    radial-gradient(130% 110% at 82% 0%, rgba(201, 162, 39, 0.16), transparent 58%),
    radial-gradient(90% 80% at 4% 100%, rgba(99, 245, 210, 0.07), transparent 60%),
    var(--night);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: 26px;
  padding-top: 10px;
  padding-bottom: 20px;
}

.page-faq .faq-hero__copy h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(28px, 7.2vw, 54px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.025em;
  color: var(--ink);
}

.page-faq .faq-hero__copy .lede {
  margin: 18px 0 0;
  max-width: 54ch;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

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

.page-faq .faq-hero__media .media__frame {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--slate);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.42);
}

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

.page-faq .faq-hero__media .media__caption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  background: var(--night);
}

.page-faq .faq-layout {
  display: grid;
  gap: 34px;
  padding-top: 40px;
  padding-bottom: 56px;
}

/* 分类索引 */
.page-faq .faq-index__label {
  display: block;
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--gold);
}

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

.page-faq .faq-index__list li {
  flex: none;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--ink);
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-index__list a .u-mono {
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  border-color: var(--gold);
  color: var(--sand);
  background: var(--slate);
}

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

/* ---------- 问答分组 ---------- */
.page-faq .faq-groups {
  display: grid;
  gap: 48px;
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 26px);
  min-width: 0;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 6px 14px;
  padding-bottom: 14px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__num {
  grid-row: 1 / span 2;
  align-self: start;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding-top: 4px;
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 4.6vw, 29px);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.24;
  color: var(--ink);
}

.page-faq .faq-group__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
  min-width: 0;
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-item[data-open],
.page-faq .faq-item:hover {
  border-color: var(--line);
}

.page-faq .faq-item[data-open] {
  border-color: var(--gold);
  background: var(--slate);
}

.page-faq .faq-item__trigger {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 16px;
  border: 0;
  background: none;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 15.5px;
  text-align: left;
  cursor: pointer;
}

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

.page-faq .faq-item__num {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-item[data-open] .faq-item__num {
  color: var(--cyan);
}

.page-faq .faq-item__q {
  font-weight: 600;
  line-height: 1.55;
  letter-spacing: 0.01em;
}

.page-faq .faq-item__icon {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  background: var(--gold);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .faq-item__icon::before {
  left: 0;
  right: 0;
  top: 6px;
  height: 1.5px;
}

.page-faq .faq-item__icon::after {
  top: 0;
  bottom: 0;
  left: 6px;
  width: 1.5px;
}

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

.page-faq .faq-item__panel {
  padding: 0 16px 18px;
  margin-top: -1px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-item__answer {
  padding-top: 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

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

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

.page-faq .faq-item__answer strong {
  color: var(--ink);
  font-weight: 600;
}

/* 步骤列表 */
.page-faq .faq-steps {
  margin: 10px 0 0;
  padding: 14px 16px 14px 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--night);
  color: var(--ink);
  font-size: 14px;
  line-height: 1.75;
}

.page-faq .faq-steps li + li {
  margin-top: 6px;
}

.page-faq .faq-steps li::marker {
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 12px;
}

/* ---------- 自助排查 ---------- */
.page-faq .faq-troubleshoot {
  background: linear-gradient(180deg, var(--night) 0%, var(--slate) 100%);
}

.page-faq .faq-troubleshoot__wrap {
  padding-top: 44px;
  padding-bottom: 52px;
}

.page-faq .faq-troubleshoot__wrap .section-head {
  margin-bottom: 26px;
}

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

.page-faq .faq-symptom {
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: inset 0 1px 0 rgba(237, 234, 227, 0.03);
}

.page-faq .faq-symptom__title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: 0.005em;
  color: var(--ink);
}

.page-faq .faq-symptom__title::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(99, 245, 210, 0.14);
}

.page-faq .faq-symptom ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
  counter-reset: sym;
}

.page-faq .faq-symptom ol li {
  position: relative;
  padding-left: 28px;
  counter-increment: sym;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-symptom ol li::before {
  content: counter(sym, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--gold);
}

/* ---------- 人工协助 ---------- */
.page-faq .faq-help {
  background: var(--night);
}

.page-faq .faq-help__grid {
  display: grid;
  gap: 30px;
  padding-top: 48px;
  padding-bottom: 64px;
  min-width: 0;
}

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

.page-faq .faq-help__media .media__frame {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--slate);
}

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

.page-faq .faq-help__media .media__caption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

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

.page-faq .faq-help__copy h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 5vw, 34px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-faq .faq-help__copy .lede {
  margin: 16px 0 0;
  max-width: 52ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-contact-card {
  margin: 26px 0 0;
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--gold);
  border-radius: var(--radius);
  background: var(--panel);
}

.page-faq .faq-contact-card dt {
  margin: 0 0 4px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-contact-card dd {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
  word-break: break-word;
}

.page-faq .faq-contact-card dd:last-of-type {
  margin-bottom: 0;
}

.page-faq .faq-copy {
  display: inline-flex;
  align-items: center;
  margin-left: 10px;
  padding: 4px 10px;
  font-size: 12px;
  vertical-align: middle;
}

.page-faq .faq-help__note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-help__note:empty {
  margin: 0;
  min-height: 0;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 中等宽度 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
    gap: 40px;
    padding-top: 24px;
    padding-bottom: 48px;
  }

  .page-faq .faq-hero__media .media__frame {
    margin-top: -12px;
  }

  .page-faq .faq-troubleshoot__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
    gap: 44px;
  }

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

  .page-faq .faq-item__panel {
    padding: 0 18px 20px;
  }

  .page-faq .faq-steps {
    padding-left: 36px;
  }
}

/* ---------- 宽屏：索引左栏固定 ---------- */
@media (min-width: 1020px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 52px;
    padding-top: 56px;
    padding-bottom: 76px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

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

  .page-faq .faq-index__list a {
    width: 100%;
    justify-content: flex-start;
    border-color: transparent;
    background: transparent;
    border-left: 2px solid transparent;
    border-radius: 0 var(--radius) var(--radius) 0;
    padding: 10px 12px;
  }

  .page-faq .faq-index__list a:hover,
  .page-faq .faq-index__list a:focus-visible {
    border-color: var(--line);
    border-left-color: var(--gold);
    background: var(--panel);
  }

  .page-faq .faq-index__list a .u-mono {
    position: relative;
    padding-left: 14px;
  }

  .page-faq .faq-index__list a .u-mono::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 5px;
    height: 5px;
    margin-top: -2.5px;
    border-radius: 50%;
    background: var(--cyan);
    opacity: 0;
    transition: opacity var(--dur) var(--ease);
  }

  .page-faq .faq-index__list a:hover .u-mono::before,
  .page-faq .faq-index__list a:focus-visible .u-mono::before {
    opacity: 1;
  }

  .page-faq .faq-groups {
    gap: 56px;
  }

  .page-faq .faq-item__trigger {
    padding: 19px 22px;
    font-size: 16px;
  }

  .page-faq .faq-item__panel {
    padding: 0 22px 24px;
  }

  .page-faq .faq-item__answer {
    max-width: 74ch;
  }
}

/* ---------- 减少动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__icon::before,
  .page-faq .faq-item__icon::after,
  .page-faq .faq-item__num,
  .page-faq .faq-index__list a,
  .page-faq .faq-index__list a .u-mono::before {
    transition: none;
  }
}
</main>