/* ===== 使用指南 /guide/ ===== */

.page-faq {
  --faq-idx-w: 248px;
}

/* --- 首屏 --- */
.page-faq .guide-hero {
  border-top: 3px solid var(--fox);
  padding: 34px 0 10px;
}

.page-faq .guide-hero .crumbs {
  margin-bottom: 22px;
}

.page-faq .guide-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(29px, 5.2vw, 54px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--cream-100);
  max-width: 22ch;
}

.page-faq .guide-hero .section-lead {
  max-width: 64ch;
  color: var(--gray-400);
  margin: 0;
}

.page-faq .hero-meta {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
}

.page-faq .hero-meta li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 14px;
  background: var(--char-800);
  border: 1px solid var(--line-dark);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--gray-400);
}

.page-faq .hero-meta .mono {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--fox);
}

/* --- 上手路径主题带 --- */
.page-faq .path-band {
  margin-top: 44px;
  padding: 44px 0 56px;
  background:
    linear-gradient(180deg, rgba(246, 239, 227, 0.05) 0%, rgba(20, 16, 14, 0) 55%),
    var(--char-800);
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.page-faq .path-head {
  max-width: 70ch;
}

.page-faq .path-head .section-title {
  margin: 8px 0 12px;
  font-family: var(--font-display);
  font-size: clamp(23px, 3.2vw, 34px);
  font-weight: 900;
  line-height: 1.18;
  color: var(--cream-100);
}

.page-faq .path-head .section-lead {
  margin: 0;
  color: var(--gray-400);
}

.page-faq .path-media {
  margin: 28px 0 0;
  border: 1px solid var(--line-dark);
  background: var(--char-900);
  overflow: hidden;
}

.page-faq .path-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 4;
  object-fit: cover;
}

.page-faq .path-media .media-caption {
  margin: 0;
  padding: 11px 14px;
  border-top: 1px solid var(--line-dark);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--gray-400);
}

/* --- 六步步骤带 --- */
.page-faq .step-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}

.page-faq .step-item {
  position: relative;
  background: var(--char-900);
  padding: 24px 20px 26px;
  transition: background var(--dur) var(--ease);
}

.page-faq .step-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20px;
  right: 20px;
  height: 2px;
  background: linear-gradient(90deg, var(--fox), var(--ember));
  transform: scaleX(0.24);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.page-faq .step-item:hover,
.page-faq .step-item:focus-within {
  background: var(--char-800);
}

.page-faq .step-item:hover::before,
.page-faq .step-item:focus-within::before {
  transform: scaleX(1);
}

.page-faq .step-num {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--fox);
}

.page-faq .step-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--cream-100);
}

.page-faq .step-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--gray-400);
}

/* --- 索引 + 问答主体 --- */
.page-faq .guide-layout {
  padding: 52px 0 8px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
}

.page-faq .guide-index {
  position: relative;
}

.page-faq .idx-title {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--gray-600);
}

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

.page-faq .idx-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px 8px 0;
  border: 1px solid transparent;
  color: var(--gray-400);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .idx-link:hover,
.page-faq .idx-link:focus-visible {
  color: var(--cream-100);
  background: var(--char-800);
  border-color: var(--line-dark);
}

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

.page-faq .idx-num {
  position: relative;
  z-index: 1;
  flex: 0 0 28px;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gray-600);
  border: 1px solid var(--line-dark);
  background: var(--char-900);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .idx-link:hover .idx-num,
.page-faq .idx-link:focus-visible .idx-num {
  color: var(--fox);
  border-color: var(--fox);
}

/* --- 章节 --- */
.page-faq .guide-chapter {
  scroll-margin-top: calc(var(--header-h) + 26px);
}

.page-faq .guide-chapter + .guide-chapter {
  margin-top: 44px;
  padding-top: 44px;
  border-top: 1px solid var(--line-dark);
}

.page-faq .chap-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 8px 14px;
  align-items: center;
  margin-bottom: 20px;
}

.page-faq .chap-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--char-900);
  background: var(--fox);
  padding: 4px 9px;
  line-height: 1.2;
}

.page-faq .chap-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 2.5vw, 28px);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--cream-100);
}

.page-faq .chap-lead {
  grid-column: 1 / -1;
  margin: 0;
  padding-left: 12px;
  border-left: 2px solid var(--fox);
  font-size: 14px;
  line-height: 1.72;
  color: var(--gray-400);
}

/* --- 折叠问答 --- */
.page-faq .qa-stack {
  display: grid;
  gap: 10px;
}

.page-faq .qa-item {
  background: var(--cream-100);
  border: 1px solid var(--line-light);
  border-left: 3px solid var(--fox);
  box-shadow: var(--shadow-panel);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .qa-item:hover {
  transform: translateY(-2px);
  border-color: var(--fox);
}

.page-faq .qa-head {
  width: 100%;
  min-height: 48px;
  margin: 0;
  padding: 15px 18px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: none;
  border: 0;
  border-radius: 0;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.56;
  color: var(--ink);
  transition: background var(--dur) var(--ease);
}

.page-faq .qa-head:hover {
  background: var(--cream-200);
}

.page-faq .qa-head[aria-expanded="true"] {
  background: var(--cream-200);
}

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

.page-faq .qa-q {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa-sign {
  position: relative;
  flex: 0 0 14px;
  width: 14px;
  height: 14px;
  margin-top: 5px;
}

.page-faq .qa-sign::before,
.page-faq .qa-sign::after {
  content: "";
  position: absolute;
  background: var(--fox);
}

.page-faq .qa-sign::before {
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  transform: translateY(-50%);
}

.page-faq .qa-sign::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  transform: translateX(-50%) rotate(0deg);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .qa-head[aria-expanded="true"] .qa-sign::after {
  transform: translateX(-50%) rotate(90deg);
  opacity: 0;
}

.page-faq .qa-body {
  padding: 14px 18px 18px;
  border-top: 1px dashed rgba(42, 31, 26, 0.2);
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}

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

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

.page-faq .qa-body a {
  color: var(--ember);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .k {
  font-family: var(--font-mono);
  font-size: 0.95em;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ember);
}

/* --- 订阅章节的图文分栏 --- */
.page-faq .chap-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-faq .chap-media {
  margin: 0;
  border: 1px solid var(--line-dark);
  background: var(--char-800);
  overflow: hidden;
}

.page-faq .chap-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.page-faq .chap-media .media-caption {
  margin: 0;
  padding: 10px 13px;
  border-top: 1px solid var(--line-dark);
  font-size: 12px;
  line-height: 1.62;
  color: var(--gray-400);
}

/* --- 页尾联系卡 --- */
.page-faq .faq-foot {
  padding: 56px 0 72px;
}

.page-faq .foot-card {
  position: relative;
  padding: 34px 26px 32px;
  background: linear-gradient(135deg, var(--char-800) 0%, var(--char-900) 100%);
  border: 1px solid var(--line-dark);
  border-left: 4px solid var(--fox);
}

.page-faq .foot-card h2 {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-size: clamp(22px, 2.8vw, 32px);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--cream-100);
}

.page-faq .foot-card p {
  margin: 0;
  max-width: 66ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--gray-400);
}

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

/* --- 响应式 --- */
@media (min-width: 620px) {
  .page-faq .step-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-faq .chap-split {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 24px;
    align-items: start;
  }

  .page-faq .foot-card {
    padding: 40px 38px 38px;
  }
}

@media (min-width: 1000px) {
  .page-faq .step-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .guide-layout {
    grid-template-columns: var(--faq-idx-w) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
    padding-top: 60px;
  }

  .page-faq .guide-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    max-height: calc(100vh - var(--header-h) - 56px);
    overflow-y: auto;
  }

  .page-faq .idx-title {
    padding-left: 20px;
  }

  .page-faq .idx-list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0 0 0 20px;
    position: relative;
  }

  .page-faq .idx-list::before {
    content: "";
    position: absolute;
    left: 46px;
    top: 6px;
    bottom: 6px;
    width: 1px;
    background: var(--line-dark);
  }

  .page-faq .idx-link {
    padding: 9px 10px 9px 12px;
    white-space: normal;
  }

  .page-faq .idx-name {
    line-height: 1.4;
  }
}

@media (max-width: 479px) {
  .page-faq .guide-hero h1 {
    font-size: 27px;
  }

  .page-faq .qa-head {
    font-size: 14.5px;
    padding: 14px 14px;
  }

  .page-faq .qa-body {
    padding: 13px 14px 16px;
  }

  .page-faq .step-item {
    padding: 20px 16px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-item,
  .page-faq .step-item,
  .page-faq .step-item::before,
  .page-faq .qa-sign::after {
    transition: none;
  }

  .page-faq .qa-item:hover {
    transform: none;
  }
}