.page-faq {
  --faq-gap: 18px;
  --faq-pad: 18px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(24px, 5vw, 54px);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  margin-top: 26px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 7.4vw, 66px);
  line-height: 1.02;
  letter-spacing: -0.015em;
  margin: 14px 0 20px;
  max-width: 18ch;
}

.page-faq .faq-hero .section__lede {
  max-width: 56ch;
}

.page-faq .faq-hero__figure {
  max-width: 320px;
  margin: 4px auto 0;
  width: 100%;
}

.page-faq .faq-hero__figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 首屏索引 ---------- */
.page-faq .faq-index {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
  display: grid;
}

.page-faq .faq-index__row + .faq-index__row {
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: baseline;
  padding: 15px 12px 15px 2px;
  text-decoration: none;
  color: var(--ink);
  border-left: 2px solid transparent;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-left-color: var(--red);
  background: rgba(169, 187, 214, 0.07);
  transform: translateX(2px);
}

.page-faq .faq-index__num {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  padding-top: 2px;
}

.page-faq .faq-index__txt {
  display: grid;
  gap: 4px;
}

.page-faq .faq-index__txt strong {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.page-faq .faq-index__txt em {
  font-style: normal;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 筛选 ---------- */
.page-faq .filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 26px 0 22px;
}

/* ---------- 折叠资料卡 ---------- */
.page-faq .folders {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .folder {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.25s var(--ease);
}

.page-faq .folder[open] {
  border-color: rgba(255, 78, 43, 0.42);
}

.page-faq .folder__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px var(--faq-pad);
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .folder[open] .folder__summary {
  box-shadow: inset 3px 0 0 var(--red);
}

.page-faq .folder__num {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
  flex: 0 0 auto;
}

.page-faq .folder[open] .folder__num {
  color: var(--cyan);
}

.page-faq .folder__title {
  flex: 1 1 auto;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.01em;
  line-height: 1.4;
}

.page-faq .folder__meta {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
  white-space: nowrap;
}

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

.page-faq .folder__sign::before,
.page-faq .folder__sign::after {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 14px;
  height: 1px;
  background: var(--muted);
  transition: transform 0.28s var(--ease), background 0.28s var(--ease);
}

.page-faq .folder__sign::after {
  transform: translateY(-50%) rotate(90deg);
}

.page-faq .folder__sign::before {
  transform: translateY(-50%);
}

.page-faq .folder[open] .folder__sign::after {
  transform: translateY(-50%) rotate(0deg);
}

.page-faq .folder[open] .folder__sign::before,
.page-faq .folder[open] .folder__sign::after {
  background: var(--red);
}

.page-faq .folder__body {
  padding: 0 var(--faq-pad) 20px;
  border-top: 1px solid var(--line);
}

/* ---------- 问答条目 ---------- */
.page-faq .qa {
  padding: 18px 0;
  border-bottom: 1px dashed var(--line-soft);
}

.page-faq .qa:last-child {
  border-bottom: 0;
  padding-bottom: 4px;
}

.page-faq .qa__q {
  position: relative;
  margin: 0 0 9px;
  padding-left: 20px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  letter-spacing: 0.01em;
}

.page-faq .qa__q::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--red);
  border-radius: 1px;
}

.page-faq .qa__a {
  margin: 0;
  padding-left: 20px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .folder__intro {
  padding-left: 0;
  margin: 18px 0 16px;
  color: var(--ink);
}

/* ---------- 步骤条 ---------- */
.page-faq .steps {
  list-style: none;
  counter-reset: faqstep;
  margin: 0;
  padding: 0 0 0 20px;
  display: grid;
  gap: 12px;
}

.page-faq .steps li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: start;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--red);
  border: 1px solid rgba(255, 78, 43, 0.5);
  border-radius: var(--radius);
  padding: 1px 6px;
  line-height: 1.5;
  margin-top: 3px;
}

/* ---------- 版本对照表 ---------- */
.page-faq .folder__figure {
  margin: 18px 0 4px;
}

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

.page-faq .vtable-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(237, 233, 225, 0.04);
  -webkit-overflow-scrolling: touch;
}

.page-faq .vtable {
  width: 100%;
  min-width: 580px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-faq .vtable th {
  text-align: left;
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--muted);
  background: rgba(169, 187, 214, 0.08);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

.page-faq .vtable th:nth-child(1) {
  width: 22%;
}

.page-faq .vtable th:nth-child(2) {
  width: 20%;
}

.page-faq .vtable td {
  padding: 14px;
  border-bottom: 1px solid var(--line-soft);
  line-height: 1.7;
  color: var(--ink);
  vertical-align: top;
}

.page-faq .vtable tbody tr:last-child td {
  border-bottom: 0;
}

.page-faq .vtable tbody tr {
  transition: background 0.2s var(--ease);
}

.page-faq .vtable tbody tr:hover,
.page-faq .vtable tbody tr:focus-within {
  background: rgba(255, 78, 43, 0.09);
}

.page-faq .vver {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .vver--now {
  font-size: 11px;
  color: var(--red-soft);
  margin-top: 4px;
}

/* ---------- 联系面板 ---------- */
.page-faq .contact-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  padding: 24px var(--faq-pad);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.page-faq .contact-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.page-faq .contact-panel__list {
  margin: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .contact-panel__row {
  display: grid;
  gap: 6px;
  padding: 14px;
  background: var(--bg-2);
}

.page-faq .contact-panel__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

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

.page-faq .faq-backline {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-backline a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--red);
  padding-bottom: 1px;
  transition: color 0.2s var(--ease);
}

.page-faq .faq-backline a:hover,
.page-faq .faq-backline a:focus-visible {
  color: var(--red-soft);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq {
    --faq-pad: 24px;
  }

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

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

  .page-faq .contact-panel {
    grid-template-columns: 1.25fr 0.75fr;
    align-items: start;
    gap: 32px;
    padding: 28px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: 1.06fr 0.94fr;
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-hero__figure {
    max-width: none;
    margin: 0;
  }

  .page-faq .folders {
    gap: 20px;
  }

  .page-faq .folder__summary {
    padding: 20px var(--faq-pad);
  }

  .page-faq .folder__body {
    padding: 0 var(--faq-pad) 26px;
  }

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

  .page-faq .filter {
    margin: 30px 0 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .folder,
  .page-faq .folder__sign::before,
  .page-faq .folder__sign::after,
  .page-faq .vtable tbody tr,
  .page-faq .faq-backline a {
    transition: none;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    transform: none;
  }
}