/* ===== 帮助中心 /help/ 页面专属样式 ===== */
.page-faq {
  --faq-rail: 300px;
  background-color: var(--ink-900);
  color: var(--bone);
  font-family: var(--font-body);
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq [id] {
  scroll-margin-top: 120px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(26px, 4.6vw, 54px) 0 clamp(24px, 3.6vw, 46px);
  border-bottom: 1px solid var(--hairline);
  background-image:
    linear-gradient(180deg, rgba(34, 245, 200, 0.10), rgba(7, 30, 24, 0) 62%),
    repeating-linear-gradient(90deg, var(--grid-line) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(0deg, var(--grid-line) 0 1px, transparent 1px 72px);
}

.page-faq .faq-hero .coord {
  margin: 16px 0 0;
  color: var(--cyan);
  letter-spacing: 0.16em;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 6vw, 54px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  margin: 10px 0 0;
  max-width: 22ch;
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: rgba(244, 241, 232, 0.86);
}

.page-faq .faq-metrics {
  list-style: none;
  margin: clamp(24px, 3.4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
}

.page-faq .faq-metrics li {
  background: var(--ink-800);
  padding: 16px 18px;
}

.page-faq .faq-metrics__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-faq .faq-metrics__num small {
  font-size: 0.42em;
  margin-left: 4px;
  color: var(--grey);
}

.page-faq .faq-metrics__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--grey);
}

/* ---------- 主布局：左目录 + 右正文 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  padding-top: clamp(28px, 4vw, 52px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

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

.page-faq .faq-rail__inner {
  border: 1px solid var(--hairline);
  background: var(--ink-800);
  padding: 20px;
}

.page-faq .faq-rail__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(20px, 2.6vw, 25px);
  letter-spacing: 0.01em;
  margin: 8px 0 0;
}

.page-faq .faq-rail__note {
  margin: 10px 0 18px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--grey);
}

.page-faq .faq-toc {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--hairline);
}

.page-faq .faq-toc li {
  border-bottom: 1px solid var(--hairline-soft);
}

.page-faq .faq-toc a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 4px;
  font-size: 15px;
  color: var(--bone);
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-toc a span {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--grey);
  transition: color 0.2s ease;
}

.page-faq .faq-toc a:hover,
.page-faq .faq-toc a:focus-visible {
  color: var(--cyan);
  padding-left: 12px;
  background: rgba(34, 245, 200, 0.06);
}

.page-faq .faq-toc a:hover span,
.page-faq .faq-toc a:focus-visible span {
  color: var(--orange);
}

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

.page-faq .faq-rail__figure {
  margin: 20px 0 0;
}

.page-faq .faq-rail__figure img {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 正文区块 ---------- */
.page-faq .faq-block {
  padding-top: clamp(26px, 3.4vw, 40px);
  border-top: 1px solid var(--hairline);
}

.page-faq .faq-block + .faq-block {
  margin-top: clamp(26px, 3.4vw, 40px);
}

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

.page-faq .faq-block__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 16px;
}

.page-faq .faq-block__idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-faq .faq-block h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(23px, 3.2vw, 32px);
  line-height: 1.15;
  letter-spacing: 0.01em;
  margin: 0;
}

.page-faq .faq-block h3 {
  font-size: clamp(16px, 1.8vw, 18px);
  font-weight: 700;
  margin: 26px 0 10px;
  color: var(--bone);
}

.page-faq .faq-block h3::before {
  content: "";
  display: inline-block;
  width: 3px;
  height: 0.85em;
  background: var(--cyan);
  margin-right: 10px;
  vertical-align: -0.08em;
}

.page-faq .faq-block p {
  margin: 0 0 14px;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(244, 241, 232, 0.88);
}

.page-faq .faq-block p a {
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid var(--hairline);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-block p a:hover,
.page-faq .faq-block p a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* 操作步骤 */
.page-faq .faq-steps {
  counter-reset: faqstep;
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 14px;
  max-width: 68ch;
}

.page-faq .faq-steps li {
  position: relative;
  padding-left: 46px;
  font-size: 15.5px;
  line-height: 1.78;
  color: rgba(244, 241, 232, 0.88);
}

.page-faq .faq-steps li::before {
  counter-increment: faqstep;
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  color: var(--cyan);
  border: 1px solid var(--hairline);
  padding: 3px 7px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-steps li:hover::before {
  color: var(--ink-900);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* 提示条 */
.page-faq .faq-block p.faq-note {
  border-left: 2px solid var(--orange);
  padding: 12px 16px;
  margin-bottom: 18px;
  font-size: 14px;
  line-height: 1.76;
  color: var(--grey);
  background: linear-gradient(90deg, rgba(255, 138, 61, 0.10), rgba(255, 138, 61, 0) 78%);
}

/* 版本三档 */
.page-faq .faq-versions {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 6px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
}

.page-faq .faq-version {
  background: var(--ink-800);
  padding: 18px;
  transition: background-color 0.2s ease;
}

.page-faq .faq-version:hover {
  background: var(--ink-700);
}

.page-faq .faq-version h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.page-faq .faq-version h3::before {
  background: var(--orange);
}

.page-faq .faq-version p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--grey);
}

/* 历史数据翻动面板 */
.page-faq .faq-scroller {
  display: flex;
  gap: 12px;
  margin-top: 18px;
  padding: 4px 0 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--ink-700) transparent;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-pane {
  flex: 0 0 min(84%, 300px);
  scroll-snap-align: start;
  min-height: 180px;
  padding: 18px;
  background: var(--ink-800);
  border: 1px solid var(--hairline);
  border-top: 2px solid var(--cyan);
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.page-faq .faq-pane:nth-child(2) {
  border-top-color: var(--orange);
}

.page-faq .faq-pane:nth-child(3) {
  border-top-color: var(--link);
}

.page-faq .faq-pane:nth-child(4) {
  border-top-color: var(--grey);
}

.page-faq .faq-pane:hover {
  background: var(--ink-700);
  transform: translateY(-3px);
}

.page-faq .faq-pane__idx {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--grey);
}

.page-faq .faq-pane h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.page-faq .faq-pane h3::before {
  display: none;
}

.page-faq .faq-pane p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 241, 232, 0.8);
}

.page-faq .faq-figure {
  margin: 22px 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-qas {
  display: grid;
  gap: 10px;
  max-width: 78ch;
}

.page-faq .faq-qa {
  background: var(--ink-800);
  border: 1px solid var(--hairline);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-qa[open] {
  border-color: rgba(34, 245, 200, 0.42);
}

.page-faq .faq-qa summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 18px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--bone);
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .faq-qa summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-qa[open] summary::after {
  content: "–";
  color: var(--orange);
}

.page-faq .faq-qa[open] summary {
  border-bottom: 1px solid var(--hairline-soft);
}

.page-faq .faq-qa__body {
  padding: 14px 18px 18px;
}

.page-faq .faq-qa__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(244, 241, 232, 0.82);
}

.page-faq .faq-qa__body a {
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-qa__body a:hover,
.page-faq .faq-qa__body a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 18px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
}

.page-faq .faq-contact__item {
  background: var(--ink-800);
  padding: 20px;
  transition: background-color 0.2s ease;
}

.page-faq .faq-contact__item:hover {
  background: var(--ink-700);
}

.page-faq .faq-contact__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--grey);
}

.page-faq .faq-block p.faq-contact__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.5;
  color: var(--cyan);
  word-break: break-word;
}

.page-faq .faq-block p.faq-contact__desc {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--grey);
}

.page-faq .faq-cta {
  margin: 22px 0 0;
}

/* ---------- 动效（渐进增强） ---------- */
.has-js .page-faq [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.has-js .page-faq [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq [data-reveal],
  .has-js .page-faq [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .page-faq .faq-pane:hover {
    transform: none;
  }
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-faq .faq-pane {
    flex-basis: 300px;
  }
}

@media (min-width: 820px) {
  .page-faq .faq-contact {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(36px, 4vw, 64px);
    align-items: start;
  }

  .page-faq .faq-rail__inner {
    position: sticky;
    top: 92px;
    max-height: calc(100vh - 116px);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--ink-700) transparent;
  }

  .page-faq .faq-rail__inner::-webkit-scrollbar {
    width: 6px;
  }

  .page-faq .faq-rail__inner::-webkit-scrollbar-thumb {
    background: var(--ink-700);
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-block p,
  .page-faq .faq-steps {
    max-width: 72ch;
  }
}