/* ===== 使用指南页：技能树式帮助路径 ===== */
.page-faq {
  --faq-hair: rgba(239, 234, 223, .16);
  --faq-body: rgba(239, 234, 223, .78);
  --faq-body-soft: rgba(239, 234, 223, .62);
  display: block;
  padding-bottom: clamp(48px, 8vw, 110px);
}

/* ---------- 首屏：主题声明 + 关键数字 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(20px, 4vw, 42px);
}

.page-faq .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: .82rem;
  color: var(--stone);
  letter-spacing: .04em;
}

.page-faq .crumbs a {
  color: var(--stone);
  text-decoration: none;
}

.page-faq .crumbs a:hover,
.page-faq .crumbs a:focus-visible {
  color: var(--accent);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
  margin-top: clamp(20px, 4vw, 36px);
}

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

.page-faq .faq-hero__vnote {
  margin: 0 0 14px;
}

.page-faq .faq-hero__intro {
  max-width: 60ch;
  margin: 18px 0 0;
  font-size: clamp(1rem, .95rem + .3vw, 1.12rem);
  line-height: 1.85;
  color: var(--faq-body);
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: var(--line);
  border: 2px solid var(--line-strong);
}

.page-faq .faq-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 14px;
  background: var(--ink-800);
  min-width: 0;
}

.page-faq .faq-hero__facts .data {
  font-size: clamp(1.4rem, 1.1rem + 1.5vw, 2.05rem);
  line-height: 1;
  color: var(--accent);
  font-weight: 600;
}

.page-faq .faq-hero__facts li > span:last-child {
  font-size: .8rem;
  line-height: 1.65;
  color: var(--stone);
}

/* ---------- 锚点跳转条 ---------- */
.page-faq .faq-jump {
  position: sticky;
  top: var(--topbar-h);
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: clamp(26px, 4vw, 46px);
  padding: 10px 0;
  overflow-x: auto;
  background: var(--ink-900);
  border-bottom: 2px solid var(--line-strong);
  scrollbar-width: none;
}

.page-faq .faq-jump::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-jump__label {
  flex: 0 0 auto;
  padding-right: 10px;
  margin-right: 2px;
  border-right: 2px solid var(--line);
  font-size: .74rem;
  letter-spacing: .2em;
  color: var(--stone);
}

.page-faq .faq-jump a {
  flex: 0 0 auto;
  padding: 7px 13px;
  border: 2px solid var(--line-strong);
  background: var(--ink-800);
  color: var(--bone);
  font-size: .84rem;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color .2s ease, color .2s ease, border-color .2s ease;
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

/* ---------- 板块骨架 ---------- */
.page-faq .faq-block {
  margin-top: clamp(54px, 9vw, 112px);
  scroll-margin-top: calc(var(--topbar-h) + 74px);
}

.page-faq .faq-block__head {
  max-width: 68ch;
}

.page-faq .faq-block__head .vnote {
  margin: 0 0 12px;
}

.page-faq .faq-block__lead {
  margin: 14px 0 0;
  color: var(--faq-body-soft);
  line-height: 1.8;
}

/* ---------- 三步流程带 ---------- */
.page-faq .steps {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-faq .steps__item {
  position: relative;
  padding: 22px 20px 24px;
  background: var(--ink-800);
  border: 2px solid var(--line-strong);
  box-shadow: 8px 8px 0 rgba(4, 8, 20, .6);
  min-width: 0;
}

.page-faq .steps__item::after {
  content: "";
  position: absolute;
  left: 30px;
  bottom: -22px;
  width: 2px;
  height: 22px;
  background: repeating-linear-gradient(to bottom, var(--accent) 0 5px, transparent 5px 10px);
  opacity: .7;
}

.page-faq .steps__item:last-child::after {
  display: none;
}

.page-faq .steps__num {
  display: block;
  font-size: 1.6rem;
  line-height: 1;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 12px;
}

.page-faq .steps__item .h3 {
  margin: 0;
  font-size: clamp(1.05rem, 1rem + .35vw, 1.22rem);
}

.page-faq .steps__item p {
  margin: 10px 0 0;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--faq-body);
}

.page-faq .faq-figure {
  margin: clamp(30px, 5vw, 52px) 0 0;
}

.page-faq .faq-figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 2px solid var(--line-strong);
  background: var(--ink-800);
}

/* ---------- 问答列表 ---------- */
.page-faq .qa-list {
  margin: clamp(24px, 4vw, 40px) 0 0;
  border-top: 2px solid var(--line-strong);
}

.page-faq .qa {
  border-bottom: 2px solid var(--faq-hair);
  transition: background-color .25s ease;
}

.page-faq .qa:hover {
  background: rgba(22, 36, 74, .35);
}

.page-faq .qa__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  padding: 18px 4px;
  list-style: none;
  cursor: pointer;
  color: var(--bone);
  font-size: clamp(1rem, .96rem + .28vw, 1.1rem);
  font-weight: 600;
  line-height: 1.6;
}

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

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.page-faq .qa__num {
  font-size: .86rem;
  line-height: 1.9;
  color: var(--stone);
}

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

.page-faq .qa__mark {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-top: 7px;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--accent);
  transition: transform .2s ease, opacity .2s ease;
}

.page-faq .qa__mark::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}

.page-faq .qa__mark::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
}

.page-faq .qa[open] .qa__mark::after {
  transform: scaleY(0);
  opacity: .4;
}

.page-faq .qa[open] .qa__q {
  color: var(--accent);
}

.page-faq .qa__a {
  padding: 0 6px 22px 34px;
  font-size: .96rem;
  line-height: 1.85;
  color: var(--faq-body);
  border-left: 2px solid var(--accent-soft);
  margin-left: 2px;
}

.page-faq .qa__a > * + * {
  margin-top: 12px;
}

.page-faq .qa__a p {
  margin: 0;
}

.page-faq .qa__key {
  display: inline-block;
  padding: 1px 7px;
  font-family: var(--font-mono);
  font-size: .88em;
  color: var(--accent);
  background: var(--accent-soft);
}

/* ---------- 导出格式表 ---------- */
.page-faq .table-scroll {
  margin-top: clamp(24px, 4vw, 40px);
  overflow-x: auto;
  border: 2px solid var(--line-strong);
  scrollbar-width: thin;
}

.page-faq .format-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: .92rem;
}

.page-faq .format-table caption {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.page-faq .format-table th,
.page-faq .format-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 2px solid var(--faq-hair);
  line-height: 1.7;
}

.page-faq .format-table thead th {
  background: var(--ink-700);
  color: var(--bone);
  font-size: .78rem;
  letter-spacing: .14em;
  font-weight: 600;
  border-bottom: 2px solid var(--line-strong);
}

.page-faq .format-table tbody th {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent);
  white-space: nowrap;
}

.page-faq .format-table tbody tr:nth-child(even) td {
  background: rgba(22, 36, 74, .5);
}

.page-faq .format-table tbody tr:last-child th,
.page-faq .format-table tbody tr:last-child td {
  border-bottom: 0;
}

/* ---------- 移动端区块的双列排布 ---------- */
.page-faq .faq-mobile {
  display: grid;
  gap: clamp(26px, 5vw, 48px);
  margin-top: clamp(24px, 4vw, 40px);
}

.page-faq .faq-mobile__list {
  margin-top: 0;
}

.page-faq .faq-mobile__figure {
  margin: 0;
  max-width: 420px;
}

.page-faq .faq-mobile__figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 2px solid var(--line-strong);
  background: var(--ink-800);
}

/* ---------- 收尾指引 ---------- */
.page-faq .faq-help {
  margin-top: clamp(56px, 9vw, 112px);
}

.page-faq .faq-help__card {
  padding: clamp(24px, 4vw, 44px);
  background: var(--ink-800);
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-help__lead {
  margin: 14px 0 0;
  max-width: 58ch;
  color: var(--faq-body);
  line-height: 1.8;
}

.page-faq .faq-help__list {
  list-style: none;
  margin: clamp(22px, 3.5vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
  background: var(--faq-hair);
  border: 2px solid var(--faq-hair);
}

.page-faq .faq-help__list a {
  display: block;
  padding: 16px 18px;
  background: var(--ink-700);
  text-decoration: none;
  color: var(--bone);
  transition: background-color .2s ease, color .2s ease;
}

.page-faq .faq-help__list a:hover,
.page-faq .faq-help__list a:focus-visible {
  background: var(--ink-900);
  color: var(--accent);
}

.page-faq .faq-help__name {
  display: block;
  font-weight: 600;
  font-size: 1rem;
}

.page-faq .faq-help__desc {
  display: block;
  margin-top: 4px;
  font-size: .84rem;
  line-height: 1.65;
  color: var(--stone);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3.5vw, 34px);
}

/* ---------- 减少动态偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .qa,
  .page-faq .faq-jump a,
  .page-faq .faq-help__list a {
    transition: none;
  }
}

/* ---------- 窄屏微调 ---------- */
@media (max-width: 420px) {
  .page-faq .faq-hero__facts {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .qa__a {
    padding-left: 18px;
  }

  .page-faq .steps__item {
    box-shadow: 6px 6px 0 rgba(4, 8, 20, .6);
  }
}

/* ---------- 桌面：横向流程带 + 两栏移动端区块 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
    gap: clamp(32px, 5vw, 64px);
  }

  .page-faq .faq-hero__facts li {
    padding: 20px 18px;
  }

  .page-faq .faq-jump {
    gap: 10px;
  }

  .page-faq .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }

  .page-faq .steps__item::after {
    left: auto;
    right: -26px;
    bottom: auto;
    top: 40px;
    width: 26px;
    height: 2px;
    background: repeating-linear-gradient(to right, var(--accent) 0 6px, transparent 6px 12px);
  }

  .page-faq .qa__q {
    grid-template-columns: 56px minmax(0, 1fr) auto;
    padding: 20px 6px;
  }

  .page-faq .qa__a {
    padding: 0 90px 26px 62px;
    font-size: 1rem;
  }

  .page-faq .faq-mobile {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-mobile__figure {
    max-width: none;
  }

  .page-faq .faq-help__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-hero__intro {
    font-size: 1.14rem;
  }
}