.page-faq {
  --faq-rail-w: 236px;
  --faq-num: rgba(200, 255, 61, .3);
  display: block;
  background: var(--ink);
  color: var(--text);
  padding-bottom: var(--zone);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gap);
  row-gap: 14px;
  padding: clamp(26px, 5vw, 56px) 0 clamp(22px, 4vw, 44px);
  border-bottom: 1px solid var(--grid);
}

.page-faq .faq-hero > * {
  grid-column: 1 / -1;
}

.page-faq .faq-hero__eyebrow {
  margin: 0;
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(29px, 5.2vw, 56px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--text);
  max-width: 20ch;
}

.page-faq .faq-hero__lede {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 64ch;
}

.page-faq .faq-hero__lede strong {
  color: var(--lime);
  font-weight: 600;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

@media (min-width: 900px) {
  .page-faq .faq-hero h1 {
    grid-column: 1 / 10;
  }
  .page-faq .faq-hero__lede {
    grid-column: 2 / 9;
  }
  .page-faq .faq-hero__actions {
    grid-column: 2 / 9;
  }
}

/* ---------- 主体框架：左目录 + 右内容 ---------- */
.page-faq .faq-frame {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-top: clamp(26px, 5vw, 52px);
}

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

.page-faq .faq-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
}

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

.page-faq .faq-rail__link {
  display: block;
  white-space: nowrap;
  padding: 8px 12px;
  border: 1px solid var(--grid);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  text-decoration: none;
  transition: border-color 160ms ease, color 160ms ease;
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  border-color: var(--lime);
  color: var(--lime);
}

@media (min-width: 1000px) {
  .page-faq .faq-frame {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    column-gap: clamp(28px, 4vw, 60px);
  }
  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    align-self: start;
  }
  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--grid);
  }
  .page-faq .faq-rail__link {
    white-space: normal;
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
    padding: 9px 0 9px 14px;
    font-family: var(--font-body);
    font-size: 14px;
    line-height: 1.6;
  }
  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-left-color: var(--lime-line);
    color: var(--text);
  }
  .page-faq .faq-rail__link.is-active,
  .page-faq .faq-rail__link[aria-current="true"] {
    border-left-color: var(--lime);
    color: var(--lime);
  }
}

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

.page-faq .faq-sec {
  min-width: 0;
  border-top: 1px solid var(--grid);
  padding-top: 24px;
  margin-bottom: clamp(36px, 5vw, 62px);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

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

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

.page-faq .faq-sec__num {
  flex: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 4.6vw, 50px);
  line-height: .85;
  color: var(--faq-num);
}

.page-faq .faq-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 2.5vw, 30px);
  line-height: 1.16;
  letter-spacing: .01em;
  color: var(--text);
}

.page-faq .faq-sec__intro {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 66ch;
}

/* ---------- 通用小标签 ---------- */
.page-faq .faq-lbl {
  display: inline-block;
  margin-right: 8px;
  padding: 2px 6px;
  border: 1px solid var(--grid);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--lime);
  vertical-align: 1px;
}

/* ---------- 01 三步检查 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

@media (min-width: 760px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }
}

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

.page-faq .faq-checks__item {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--grid);
}

.page-faq .faq-checks__box {
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border: 1px solid var(--lime);
  background:
    linear-gradient(135deg, transparent 46%, var(--lime-line) 46%, var(--lime-line) 54%, transparent 54%);
}

.page-faq .faq-checks__title {
  margin: 0 0 7px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
}

.page-faq .faq-checks__when,
.page-faq .faq-checks__act {
  margin: 0 0 5px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-checks__act {
  margin-bottom: 0;
  color: var(--text);
}

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

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--grid);
  background: var(--panel);
}

.page-faq .faq-figure .ld-media__cap {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

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

/* ---------- 02 现象标签页 ---------- */
.page-faq .faq-sym {
  position: relative;
  margin-top: 4px;
  border: 1px solid var(--grid);
  background: var(--panel);
}

.page-faq .faq-sym__input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  opacity: 0;
}

.page-faq .faq-sym__tabs {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--grid);
}

.page-faq .faq-sym__tab {
  position: relative;
  padding: 13px 16px;
  font-size: 14px;
  line-height: 1.4;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
  transition: color 160ms ease;
}

.page-faq .faq-sym__tab::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--lime);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 160ms ease;
}

.page-faq .faq-sym__tab:hover {
  color: var(--text);
}

.page-faq .faq-sym__input:focus-visible ~ .faq-sym__tabs {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-faq #sym-blank:checked ~ .faq-sym__tabs .faq-sym__tab[for="sym-blank"],
.page-faq #sym-stall:checked ~ .faq-sym__tabs .faq-sym__tab[for="sym-stall"],
.page-faq #sym-stale:checked ~ .faq-sym__tabs .faq-sym__tab[for="sym-stale"] {
  color: var(--lime);
}

.page-faq #sym-blank:checked ~ .faq-sym__tabs .faq-sym__tab[for="sym-blank"]::after,
.page-faq #sym-stall:checked ~ .faq-sym__tabs .faq-sym__tab[for="sym-stall"]::after,
.page-faq #sym-stale:checked ~ .faq-sym__tabs .faq-sym__tab[for="sym-stale"]::after {
  transform: scaleX(1);
}

.page-faq .faq-sym__panel {
  display: none;
  padding: 20px 18px 22px;
}

.page-faq #sym-blank:checked ~ .faq-sym__panels .faq-sym__panel[data-sym="blank"],
.page-faq #sym-stall:checked ~ .faq-sym__panels .faq-sym__panel[data-sym="stall"],
.page-faq #sym-stale:checked ~ .faq-sym__panels .faq-sym__panel[data-sym="stale"] {
  display: block;
}

.page-faq .faq-sym__when {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

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

.page-faq .faq-steps__item {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--grid-soft);
  font-size: 14px;
  line-height: 1.78;
  color: var(--text);
}

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

.page-faq .faq-steps__n {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--lime);
  padding-top: 3px;
}

/* ---------- 03 时间节奏 ---------- */
.page-faq .faq-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--grid);
}

.page-faq .faq-timeline__item {
  position: relative;
  padding-bottom: 22px;
}

.page-faq .faq-timeline__item:last-child {
  padding-bottom: 0;
}

.page-faq .faq-timeline__item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--orange);
}

.page-faq .faq-timeline__time {
  display: inline-block;
  margin-bottom: 7px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--orange);
}

.page-faq .faq-timeline__body {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
}

/* ---------- 04 编号核对 ---------- */
.page-faq .faq-ordered {
  counter-reset: fq;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-ordered > li {
  counter-increment: fq;
  position: relative;
  padding: 14px 0 14px 42px;
  border-top: 1px solid var(--grid);
  font-size: 14px;
  line-height: 1.82;
  color: var(--text);
}

.page-faq .faq-ordered > li:last-child {
  border-bottom: 1px solid var(--grid);
}

.page-faq .faq-ordered > li::before {
  content: counter(fq, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 15px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--lime);
}

.page-faq .faq-inline-cta {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-inline-cta a,
.page-faq .faq-more a,
.page-faq .faq-contact__note a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid var(--lime-line);
}

/* ---------- 05 准备清单 ---------- */
.page-faq .faq-kit {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid var(--grid);
}

.page-faq .faq-kit__item {
  min-width: 0;
  padding: 16px 0;
  border-bottom: 1px solid var(--grid);
}

@media (min-width: 620px) {
  .page-faq .faq-kit {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .faq-kit__item:nth-child(odd) {
    padding-right: 26px;
    border-right: 1px solid var(--grid);
  }
  .page-faq .faq-kit__item:nth-child(even) {
    padding-left: 26px;
  }
}

.page-faq .faq-kit__k {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--lime);
}

.page-faq .faq-kit__v {
  display: block;
  font-size: 14px;
  line-height: 1.78;
  color: var(--text);
}

/* ---------- 06 联系 ---------- */
.page-faq .faq-contact {
  border: 1px solid var(--lime-line);
  background:
    linear-gradient(135deg, rgba(200, 255, 61, .08), transparent 58%),
    var(--panel);
  padding: clamp(18px, 3vw, 30px);
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 14px 0;
  border-top: 1px solid var(--grid);
}

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

.page-faq .faq-contact__k {
  flex: none;
  min-width: 52px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
}

.page-faq .faq-contact__v {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--text);
  word-break: break-all;
}

.page-faq .faq-contact__note {
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--grid);
  font-size: 14px;
  line-height: 1.82;
  color: var(--muted);
}

.page-faq .faq-more {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--muted);
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rail__link,
  .page-faq .faq-sym__tab,
  .page-faq .faq-sym__tab::after {
    transition: none;
  }
}