/* ========================================================
   page-faq · 帮助中心
   仅在本页作用域内生效
   ======================================================== */

.page-faq {
  --faq-panel: var(--ink-850);
  --faq-pad: 18px;
  background-color: var(--ink-900);
  color: var(--bone-100);
  font-family: var(--font-body);
  line-height: 1.85;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 26px 0 44px;
  border-bottom: var(--hairline);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  width: 3px;
  height: 84px;
  background: var(--cyan-400);
}

.page-faq .crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .03em;
  color: var(--stone-500);
  margin-bottom: 30px;
}

.page-faq .crumbs a {
  color: var(--stone-300);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s ease-out, border-color .16s ease-out;
}

.page-faq .crumbs a:hover {
  color: var(--cyan-400);
  border-bottom-color: var(--cyan-400);
}

.page-faq .crumbs__sep {
  color: var(--moss-700);
}

.page-faq .crumbs [aria-current="page"] {
  color: var(--bone-100);
}

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

.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(44px, 12vw, 112px);
  line-height: .92;
  letter-spacing: -0.02em;
  margin: 10px 0 20px;
  color: var(--bone-100);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 31em;
  font-size: 15px;
  color: var(--stone-300);
}

.page-faq .faq-hero__meta {
  border-top: 1px solid var(--moss-700);
  padding-top: 14px;
}

.page-faq .faq-hero__stamp {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--cyan-400);
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.page-faq .faq-hero__stats li {
  border-left: 1px solid var(--moss-700);
  padding-left: 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-faq .faq-hero__num {
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1.1;
  color: var(--bone-100);
  letter-spacing: -0.01em;
}

.page-faq .faq-hero__cap {
  font-size: 11.5px;
  color: var(--stone-500);
  letter-spacing: .04em;
}

.page-faq .faq-hero__note {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--stone-500);
  max-width: 40em;
}

/* ---------- 工具栏 ---------- */
.page-faq .faq-toolbar {
  background: var(--faq-panel);
  border-bottom: var(--hairline);
  padding: 14px 0;
}

.page-faq .faq-toolbar__inner {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-faq .faq-search {
  display: flex;
  align-items: center;
  width: 100%;
  border: 1px solid var(--moss-700);
  background: var(--ink-900);
  transition: border-color .16s ease-out;
}

.page-faq .faq-search:focus-within {
  border-color: var(--cyan-400);
}

.page-faq .faq-search__input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--bone-100);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .02em;
  padding: 10px 12px;
  appearance: none;
}

.page-faq .faq-search__input::placeholder {
  color: var(--stone-500);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-faq .faq-jump__link {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 7px 10px;
  border: 1px solid var(--moss-700);
  color: var(--stone-300);
  font-size: 12.5px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .16s ease-out, color .16s ease-out, background-color .16s ease-out;
}

.page-faq .faq-jump__link .mono {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--stone-500);
  letter-spacing: .04em;
}

.page-faq .faq-jump__link:hover {
  border-color: var(--cyan-400);
  color: var(--bone-100);
}

.page-faq .faq-jump__link[aria-current]:not([aria-current="false"]) {
  border-color: var(--cyan-400);
  background: rgba(46, 230, 200, .07);
  color: var(--cyan-400);
}

.page-faq .faq-jump__link[aria-current]:not([aria-current="false"]) .mono {
  color: var(--cyan-400);
}

/* ---------- 门类区块 ---------- */
.page-faq .faq-cat {
  padding: 44px 0 40px;
  border-bottom: var(--hairline-soft);
}

.page-faq .faq-cat--last {
  border-bottom: 0;
  padding-bottom: 72px;
}

.page-faq .faq-cat__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  border-top: 1px solid var(--moss-700);
  padding-top: 16px;
  margin-bottom: 24px;
}

.page-faq .faq-cat__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan-400);
}

.page-faq .faq-cat__title {
  flex: 1 1 auto;
  min-width: 0;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 5vw, 38px);
  line-height: 1.05;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  color: var(--bone-100);
}

.page-faq .faq-cat__sub {
  flex: 1 1 100%;
  margin: 0;
  max-width: 46em;
  font-size: 13.5px;
  color: var(--stone-500);
}

.page-faq .faq-cat__footnote {
  margin: 22px 0 0;
  padding-left: 14px;
  border-left: 1px solid var(--moss-700);
  font-size: 13px;
  color: var(--stone-300);
  max-width: 46em;
}

/* ---------- 三条最短路径 ---------- */
.page-faq .path-list {
  list-style: none;
  margin: 0 0 30px;
  padding: 0;
}

.page-faq .path {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 0 14px;
  padding: 18px 0;
  border-bottom: var(--hairline-soft);
}

.page-faq .path:first-child {
  border-top: var(--hairline-soft);
}

.page-faq .path__no {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan-400);
  letter-spacing: .05em;
  padding-top: 3px;
}

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

.page-faq .path__act {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 500;
  color: var(--bone-100);
  line-height: 1.6;
}

.page-faq .path__desc {
  margin: 0;
  max-width: 44em;
  font-size: 14px;
  color: var(--stone-300);
}

.page-faq .path__back {
  margin: 9px 0 0;
  font-size: 12.5px;
  color: var(--stone-500);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 0;
}

.page-faq .faq-figure__cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .02em;
  line-height: 1.7;
  color: var(--stone-500);
}

.page-faq .faq-figure-slim {
  padding: 34px 0 6px;
  border-bottom: var(--hairline-soft);
}

.page-faq .faq-figure-slim__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  align-items: center;
}

.page-faq .faq-figure-slim__cap {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  letter-spacing: .02em;
  color: var(--stone-500);
}

/* ---------- 问答条目 ---------- */
.page-faq .qa-list {
  display: grid;
  gap: 0;
}

.page-faq .qa {
  border-bottom: var(--hairline-soft);
}

.page-faq .qa:first-child {
  border-top: var(--hairline-soft);
}

.page-faq .qa__h {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .qa__toggle {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 6px 14px;
  width: 100%;
  padding: 16px 2px;
  border: 0;
  background: transparent;
  color: var(--bone-100);
  text-align: left;
  font-family: inherit;
  cursor: pointer;
}

.page-faq .qa__no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .05em;
  color: var(--stone-500);
  transition: color .16s ease-out;
}

.page-faq .qa__q {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 15.5px;
  line-height: 1.5;
  letter-spacing: .01em;
  color: var(--bone-100);
  transition: color .16s ease-out;
}

.page-faq .qa__icon {
  width: 10px;
  height: 10px;
  margin-top: -4px;
  border-right: 1px solid var(--stone-500);
  border-bottom: 1px solid var(--stone-500);
  transform: rotate(45deg);
  transition: transform .16s ease-out, border-color .16s ease-out;
}

.page-faq .qa__toggle:hover .qa__no,
.page-faq .qa__toggle:hover .qa__q,
.page-faq .qa__toggle:focus-visible .qa__q {
  color: var(--cyan-400);
}

.page-faq .qa__toggle:hover .qa__icon,
.page-faq .qa__toggle:focus-visible .qa__icon {
  border-color: var(--cyan-400);
}

.page-faq .qa:not([data-collapsed]) .qa__no {
  color: var(--cyan-400);
}

.page-faq .qa[data-collapsed] .qa__q {
  color: var(--stone-300);
}

.page-faq .qa[data-collapsed] .qa__icon {
  transform: rotate(-45deg);
  margin-top: 2px;
}

.page-faq .qa[data-collapsed] .qa__body {
  display: none;
}

.page-faq .qa__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding: 0 2px 20px 30px;
}

.page-faq .qa__text {
  margin: 0;
  max-width: 42em;
  font-size: 14px;
  color: var(--stone-300);
}

.page-faq .qa__side {
  margin: 0;
  max-width: 42em;
  padding-left: 12px;
  border-left: 2px solid var(--clay-600);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--stone-500);
}

.page-faq .qa__side a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 230, 200, .35);
  transition: border-color .16s ease-out;
}

.page-faq .qa__side a:hover {
  border-bottom-color: var(--cyan-400);
}

/* ---------- 收尾：口径与边界 ---------- */
.page-faq .faq-closing {
  display: grid;
  gap: 18px;
}

.page-faq .faq-closing__note {
  margin: 0;
  max-width: 50em;
  padding: 14px 0 14px 16px;
  border-left: 3px solid var(--flag-500);
  background: rgba(228, 87, 61, .05);
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--stone-300);
}

.page-faq .faq-closing__text {
  margin: 0;
  max-width: 46em;
  font-size: 14px;
  color: var(--stone-300);
}

.page-faq .faq-closing__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ========================================================
   响应式
   ======================================================== */
@media (min-width: 720px) {
  .page-faq .faq-figure-slim__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
    gap: 28px;
  }

  .page-faq .faq-figure-slim__cap {
    border-left: 1px solid var(--moss-700);
    padding-left: 14px;
  }

  .page-faq .qa__body {
    padding-left: 46px;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-hero {
    padding: 40px 0 62px;
  }

  .page-faq .faq-hero::after {
    top: 40px;
    height: 120px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: end;
  }

  .page-faq .faq-toolbar__inner {
    flex-direction: row;
    align-items: center;
    gap: 26px;
  }

  .page-faq .faq-search {
    flex: 0 0 320px;
    width: 320px;
  }

  .page-faq .faq-cat {
    padding: 58px 0 48px;
  }

  .page-faq .faq-cat__head {
    gap: 12px 20px;
    margin-bottom: 30px;
  }

  .page-faq .faq-cat__title {
    flex: 0 1 auto;
  }

  .page-faq .faq-cat__sub {
    flex: 1 1 auto;
    align-self: flex-end;
    text-align: right;
  }

  .page-faq .path {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 0 24px;
    padding: 22px 0;
  }

  .page-faq .path__no {
    font-size: 14px;
  }

  .page-faq .qa__toggle {
    padding: 18px 2px;
    gap: 0 20px;
  }

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

  .page-faq .qa--notes .qa__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 250px);
    gap: 36px;
    padding-left: 62px;
  }

  .page-faq .qa__text {
    font-size: 14.5px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-hero::after {
    height: 148px;
  }

  .page-faq .faq-hero__lead {
    font-size: 15.5px;
  }

  .page-faq .qa--notes .qa__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 290px);
    gap: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__icon,
  .page-faq .qa__q,
  .page-faq .qa__no,
  .page-faq .faq-jump__link,
  .page-faq .faq-search,
  .page-faq .crumbs a {
    transition: none;
  }
}