/* ===== 使用指南（/guide/）页面专属样式，作用域 .page-faq ===== */
.page-faq {
  --faq-rail: 216px;
  --faq-line: rgba(31, 94, 107, .16);
  --faq-soft: rgba(58, 68, 78, .72);
}

.page-faq .faq-crumb {
  padding-top: 16px;
}

.page-faq [id] {
  scroll-margin-top: calc(var(--top-h) + 26px);
}

/* ---------- 首屏：非对称分栏 ---------- */
.page-faq .faq-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  padding-top: clamp(24px, 4.5vw, 52px);
  padding-bottom: clamp(20px, 3.5vw, 40px);
}

.page-faq .hero-main {
  min-width: 0;
}

.page-faq .hero-main .lede {
  max-width: 40ch;
  margin-top: 14px;
}

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

.page-faq .hero-side {
  background: var(--deep);
  color: var(--sand);
  border-radius: var(--radius);
  padding: clamp(18px, 2.6vw, 26px);
}

.page-faq .hero-side-title {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gold-lt);
}

.page-faq .quick-link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 13px 0;
  border-top: 1px solid rgba(246, 239, 227, .22);
  color: var(--white);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.5;
  transition: transform var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .quick-link .mono-num {
  color: var(--data);
  flex: none;
}

.page-faq .quick-link:hover,
.page-faq .quick-link:focus-visible {
  transform: translateX(5px);
  color: var(--gold-lt);
}

.page-faq .quick-link:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.page-faq .hero-side-note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(246, 239, 227, .74);
}

/* ---------- 归档总览 ---------- */
.page-faq .faq-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
}

.page-faq .archive-visual,
.page-faq .archive-body {
  grid-column: 1 / -1;
  min-width: 0;
}

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

.page-faq .archive-visual .media {
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .archive-lede {
  margin: 10px 0 18px;
  color: var(--ink);
  line-height: 1.8;
  max-width: 46ch;
}

.page-faq .cat-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .cat-item {
  border-top: 1px solid var(--faq-line);
}

.page-faq .cat-item:last-child {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .cat-item .index-link {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 12px 6px;
  text-decoration: none;
  color: var(--teal);
  border-left: 3px solid transparent;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .cat-item .index-link:hover,
.page-faq .cat-item .index-link:focus-visible {
  background: rgba(243, 194, 124, .26);
  border-left-color: var(--gold);
  transform: translateX(4px);
}

.page-faq .cat-item .index-link:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 2px;
}

.page-faq .cat-item .index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
  flex: none;
}

.page-faq .cat-item .index-title {
  font-weight: 700;
  font-size: 17px;
  flex: none;
}

.page-faq .cat-item .index-meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--data);
  flex: none;
}

.page-faq .cat-desc {
  margin: 0 0 14px;
  padding: 0 12px 0 43px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--faq-soft);
}

/* ---------- 左索引 + 右答案流 ---------- */
.page-faq .guide-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-faq .guide-flow {
  min-width: 0;
}

.page-faq .gindex {
  border: 1px solid var(--faq-line);
  background: var(--white);
  border-radius: var(--radius);
  padding: 12px;
}

.page-faq .gindex-head {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-faq .gindex-list {
  list-style: none;
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .gindex-list li {
  flex: none;
}

.page-faq .gindex-link {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  border-left: 3px solid transparent;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .gindex-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gold);
}

.page-faq .gindex-link:hover,
.page-faq .gindex-link:focus-visible {
  background: var(--sand);
  border-left-color: var(--gold);
  color: var(--teal);
}

.page-faq .gindex-link:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 2px;
}

.page-faq .gindex-foot {
  display: none;
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--faq-soft);
}

.page-faq .gindex-foot a {
  color: var(--red);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

/* ---------- 答案流区块 ---------- */
.page-faq .flow-block {
  padding-top: clamp(28px, 4vw, 46px);
}

.page-faq .flow-block:first-child {
  padding-top: 0;
}

.page-faq .flow-block + .flow-block {
  border-top: 1px solid var(--faq-line);
  margin-top: clamp(30px, 4vw, 48px);
}

.page-faq .flow-block--last {
  padding-bottom: clamp(30px, 5vw, 60px);
}

.page-faq .block-lede {
  margin: 12px 0 20px;
  max-width: 52ch;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 问答条目 ---------- */
.page-faq .qa {
  border-top: 1px solid var(--faq-line);
  transition: border-color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-faq .qa:last-of-type {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .qa[open] {
  border-left: 3px solid var(--gold);
  padding-left: 12px;
}

.page-faq .qa > summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) 20px;
  gap: 10px;
  align-items: start;
  padding: 16px 4px;
  transition: background var(--dur) var(--ease);
}

.page-faq .qa > summary::-webkit-details-marker {
  display: none;
}

.page-faq .qa > summary:hover {
  background: rgba(243, 194, 124, .24);
}

.page-faq .qa > summary:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.page-faq .qa-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
  padding-top: 4px;
}

.page-faq .qa-q {
  font-size: clamp(16px, 1.6vw, 18px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--teal);
}

.page-faq .qa-mark::before {
  content: "+";
  display: block;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.3;
  color: var(--teal);
  transition: color var(--dur) var(--ease);
}

.page-faq .qa[open] .qa-mark::before {
  content: "\2212";
  color: var(--red);
}

.page-faq .qa-a {
  padding: 2px 4px 20px 40px;
  animation: faq-q-in .2s var(--ease) both;
}

.page-faq .qa-a p {
  margin: 0 0 10px;
  line-height: 1.85;
  color: var(--ink);
  max-width: 62ch;
}

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

.page-faq .qa-next a {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--red);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .qa-next a:hover,
.page-faq .qa-next a:focus-visible {
  color: var(--red-deep);
  transform: translateX(3px);
}

.page-faq .qa-next a:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 3px;
  border-radius: 3px;
}

@keyframes faq-q-in {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 键盘路径带 ---------- */
.page-faq .kb-band {
  background: var(--deep);
  color: var(--sand);
  border-radius: var(--radius);
  padding: clamp(22px, 3.4vw, 40px);
  border-top: none;
}

.page-faq .kb-title {
  color: var(--white);
}

.page-faq .eyebrow-on-deep {
  color: var(--gold-lt);
}

.page-faq .eyebrow-on-deep::before {
  background: var(--gold);
}

.page-faq .kb-lede {
  margin: 12px 0 22px;
  max-width: 56ch;
  line-height: 1.85;
  color: rgba(246, 239, 227, .88);
}

.page-faq .keypath {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin: 0 0 26px;
  padding: 0;
}

.page-faq .keypath li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(246, 239, 227, .86);
}

.page-faq .key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  padding: 4px 8px 6px;
  border: 1px solid rgba(246, 239, 227, .36);
  border-bottom-width: 3px;
  border-radius: 6px;
  background: rgba(246, 239, 227, .12);
  color: var(--white);
}

.page-faq .arrow {
  font-family: var(--font-mono);
  color: var(--gold);
}

.page-faq .kb-figure {
  margin: 0;
}

.page-faq .kb-figure .media {
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid rgba(246, 239, 227, .2);
}

.page-faq .kb-figure .media-cap {
  color: rgba(246, 239, 227, .7);
}

/* ---------- 联系区 ---------- */
.page-faq .contact-panel {
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius);
  background: var(--sand);
  padding: 6px 18px;
  margin-bottom: 16px;
}

.page-faq .contact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(31, 94, 107, .14);
}

.page-faq .contact-row:last-child {
  border-bottom: none;
}

.page-faq .contact-key {
  flex: none;
  min-width: 72px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--teal);
  padding-top: 3px;
}

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

.page-faq .contact-note {
  margin: 0 0 22px;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--faq-soft);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .gindex-foot {
    display: block;
  }
}

@media (min-width: 920px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-faq .faq-archive .archive-visual {
    grid-column: span 5;
  }

  .page-faq .faq-archive .archive-body {
    grid-column: span 7;
  }

  .page-faq .qa > summary {
    grid-template-columns: 42px minmax(0, 1fr) 22px;
    padding: 18px 6px;
  }

  .page-faq .qa-a {
    padding-left: 58px;
  }
}

@media (min-width: 1000px) {
  .page-faq .guide-shell {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .gindex {
    position: sticky;
    top: calc(var(--top-h) + 22px);
    padding: 18px 14px;
  }

  .page-faq .gindex-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .gindex-link {
    white-space: normal;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-a {
    animation: none;
  }

  .page-faq .quick-link,
  .page-faq .cat-item .index-link,
  .page-faq .gindex-link,
  .page-faq .qa-next a {
    transition: none;
  }

  .page-faq .quick-link:hover,
  .page-faq .quick-link:focus-visible,
  .page-faq .cat-item .index-link:hover,
  .page-faq .cat-item .index-link:focus-visible,
  .page-faq .qa-next a:hover,
  .page-faq .qa-next a:focus-visible {
    transform: none;
  }
}