.page-faq {
  --faq-notch: 14px;
  display: block;
  padding: 22px 0 72px;
  color: var(--ink);
  background-image:
    repeating-linear-gradient(to right, rgba(169, 184, 177, .28) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(to bottom, rgba(169, 184, 177, .18) 0 1px, transparent 1px 64px);
}

.page-faq .crumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--muted);
  margin: 0 0 18px;
}

.page-faq .crumb a {
  color: var(--bamboo);
  text-decoration: none;
  border-bottom: 1px solid var(--data);
}

.page-faq .crumb a:hover {
  color: var(--ink);
}

.page-faq .crumb__sep {
  margin: 0 8px;
  color: var(--grid);
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  position: relative;
  border: var(--edge);
  background: var(--card);
  box-shadow: var(--shadow);
  padding: 22px 18px 20px;
  margin: 0 0 26px;
}

.page-faq .faq-hero::before {
  content: "";
  display: block;
  height: 10px;
  margin: 0 0 16px;
  border-bottom: 2px solid var(--ink);
  background-image: repeating-linear-gradient(to right, var(--ink) 0 2px, transparent 2px 14px);
  background-size: 14px 6px;
  background-position: left bottom;
  background-repeat: repeat-x;
}

.page-faq .kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--bamboo);
  margin: 0;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -.02em;
  font-size: clamp(28px, 7.2vw, 52px);
  line-height: 1.12;
  color: var(--ink);
  margin: 12px 0 16px;
  max-width: 22em;
}

.page-faq .faq-hero__lede {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink);
  max-width: 40em;
  margin: 0 0 18px;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px dashed var(--grid);
}

.page-faq .faq-hero__count {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-hero__note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  margin: 12px 0 0;
  max-width: 36em;
}

/* ---------- 筛选条 ---------- */
.page-faq .filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 14px;
}

.page-faq .faq-empty {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--haze);
  border: 2px dashed var(--ink);
  padding: 12px 14px;
  margin: 0 0 18px;
}

/* ---------- 章节 ---------- */
.page-faq .faq-sec {
  margin: 0 0 46px;
}

.page-faq .faq-sec__head {
  border-left: 6px solid var(--bamboo);
  padding-left: 14px;
  margin: 0 0 18px;
}

.page-faq .faq-sec__head h2 {
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -.02em;
  font-size: clamp(22px, 5vw, 34px);
  line-height: 1.15;
  color: var(--ink);
  margin: 0 0 6px;
}

.page-faq .faq-sec__head p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
  max-width: 40em;
}

/* ---------- 图 ---------- */
.page-faq .faq-fig {
  margin: 0 0 20px;
  border: var(--edge);
  background: var(--card);
  box-shadow: var(--shadow-sm);
}

.page-faq .faq-fig .figure__media {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-bottom: 2px solid var(--ink);
}

.page-faq .faq-fig .figure__cap {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.65;
  color: var(--bamboo);
  margin: 0;
}

/* ---------- 问答卡 ---------- */
.page-faq .qa {
  border: var(--edge);
  background: var(--card);
  box-shadow: var(--shadow-sm);
  margin: 0 0 16px;
  scroll-margin-top: 78px;
}

.page-faq .qa[open] {
  box-shadow: var(--shadow);
}

.page-faq .qa__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  background: var(--card);
}

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

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

.page-faq .qa__no {
  order: 1;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: .04em;
  color: var(--ink);
  background: var(--haze);
  border: 1px solid var(--ink);
  padding: 2px 6px;
  min-width: 34px;
  text-align: center;
}

.page-faq .qa__tag {
  order: 2;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--bamboo);
  border: 1px dashed var(--grid);
  padding: 2px 7px;
  white-space: nowrap;
}

.page-faq .qa__dot {
  order: 3;
  margin-left: auto;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1.5px solid var(--ink);
  background: var(--grid);
  flex: none;
}

.page-faq .qa--high .qa__dot { background: var(--signal); }
.page-faq .qa--mid  .qa__dot { background: var(--data); }
.page-faq .qa--low  .qa__dot { background: var(--cell); }

.page-faq .qa__title {
  order: 4;
  flex: 1 1 100%;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16.5px;
  line-height: 1.45;
  color: var(--ink);
  min-width: 0;
}

.page-faq .qa__body {
  border-top: 2px solid var(--ink);
  background: var(--mist);
  padding: 16px;
  display: grid;
  gap: 14px;
}

.page-faq .qa__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink);
  max-width: 42em;
}

.page-faq .qa__body a {
  color: var(--bamboo);
  text-decoration: none;
  border-bottom: 1px solid var(--data);
}

.page-faq .qa__body a:hover {
  color: var(--signal);
}

/* ---------- 步骤清单 ---------- */
.page-faq .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .step__row {
  display: grid;
  grid-template-columns: 17px 24px 1fr;
  gap: 8px;
  align-items: start;
  cursor: pointer;
}

.page-faq .step__box {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  margin: 5px 0 0;
  border: 2px solid var(--ink);
  background: var(--card);
  cursor: pointer;
  transition: background 140ms var(--ease);
}

.page-faq .step__box:checked {
  background: var(--bamboo);
}

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

.page-faq .step__no {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.85;
  letter-spacing: .05em;
  color: var(--bamboo);
  font-variant-numeric: tabular-nums;
}

.page-faq .step__txt {
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink);
}

/* ---------- 邮件面板 ---------- */
.page-faq .faq-sec--last {
  margin-bottom: 0;
}

.page-faq .faq-mail {
  border: var(--edge);
  box-shadow: var(--shadow);
  padding: 22px 18px 24px;
}

.page-faq .faq-mail h2 {
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -.02em;
  font-size: clamp(21px, 4.6vw, 30px);
  line-height: 1.2;
  margin: 0 0 12px;
}

.page-faq .faq-mail p {
  font-size: 15px;
  line-height: 1.8;
  margin: 0 0 16px;
  max-width: 42em;
}

.page-faq .faq-mail a {
  color: var(--haze);
  text-decoration: none;
  border-bottom: 1px solid var(--signal);
}

.page-faq .mail-fields {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 8px;
}

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

.page-faq .mail-fields li::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--signal);
  border: 1px solid var(--mist);
  display: block;
}

.page-faq .mail-tpl {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.9;
  font-variant-numeric: tabular-nums;
  background: rgba(233, 235, 231, .08);
  border: 1px dashed var(--grid);
  padding: 14px;
  margin: 0 0 16px;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}

.page-faq .mail-foot {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--cell);
}

/* ---------- 平板 ---------- */
@media (min-width: 760px) {
  .page-faq .qa__head {
    display: grid;
    grid-template-columns: 44px auto 1fr 14px;
    align-items: center;
    gap: 16px;
    padding: 16px 22px;
  }

  .page-faq .qa__no,
  .page-faq .qa__tag,
  .page-faq .qa__title,
  .page-faq .qa__dot {
    order: 0;
    margin-left: 0;
    flex: none;
  }

  .page-faq .qa__no {
    width: 100%;
  }

  .page-faq .qa__title {
    font-size: 17.5px;
  }

  .page-faq .qa__body {
    padding: 20px 22px 24px;
  }

  .page-faq .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 22px;
  }

  .page-faq .faq-fig--tall {
    max-width: 620px;
  }

  .page-faq .mail-fields {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 24px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-faq {
    padding-bottom: 104px;
  }

  .page-faq .faq-hero {
    padding: 32px 36px 28px;
    margin-bottom: 34px;
  }

  .page-faq .faq-hero__lede {
    font-size: 17px;
  }

  .page-faq .faq-sec {
    margin-bottom: 62px;
  }

  .page-faq .qa__body p {
    font-size: 16px;
  }

  .page-faq .step__txt {
    font-size: 16px;
  }

  .page-faq .faq-mail {
    padding: 30px 34px 32px;
  }

  .page-faq .mail-tpl {
    font-size: 13.5px;
  }
}

/* ---------- 宽屏：卡片宽度交替 ---------- */
@media (min-width: 1100px) {
  .page-faq .qa--narrow {
    max-width: 82%;
    margin-left: auto;
  }

  .page-faq .qa--narrow .steps {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-fig--tall {
    margin-left: auto;
    margin-right: 0;
  }
}

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