.page-faq {
  --faq-rail-w: 226px;
  --faq-tint: rgba(234, 244, 241, .78);
  padding-block: clamp(18px, 3vw, 36px) clamp(56px, 9vw, 110px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  margin-top: 16px;
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 92% at 88% 6%, rgba(58, 237, 212, .13), transparent 58%),
    linear-gradient(152deg, var(--panel), var(--bg-night) 58%, var(--bg-abyss));
  padding: clamp(24px, 4vw, 56px) clamp(20px, 3.6vw, 52px) clamp(28px, 4.4vw, 58px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--neon), var(--coral) 48%, var(--score) 74%, transparent);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 26px;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-size: clamp(27px, 4.4vw, 52px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--ink);
  max-width: 24ch;
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1vw + 12px, 18px);
  line-height: 1.85;
  color: var(--faq-tint);
}

.page-faq .faq-hero__stats {
  margin-top: clamp(22px, 3vw, 36px);
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  max-width: 620px;
}

.page-faq .faq-stat {
  border-top: 1px solid var(--edge);
  padding-top: 12px;
}

.page-faq .faq-stat__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 2.6vw, 36px);
  font-variant-numeric: tabular-nums;
  line-height: 1;
  color: var(--neon);
  letter-spacing: -0.02em;
}

.page-faq .faq-stat__label {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .faq-hero__card {
  background: var(--bg-abyss);
  padding: 16px 18px 18px;
}

.page-faq .faq-hero__card-num {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 40px;
  line-height: 1;
  color: var(--coral);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-hero__card-label {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 分栏骨架 ---------- */
.page-faq .faq-layout {
  margin-top: clamp(26px, 4vw, 52px);
}

.page-faq .faq-rail {
  position: sticky;
  top: calc(var(--header-h) + 8px);
  z-index: 4;
  margin: 0 calc(-1 * var(--gutter));
  padding: 10px var(--gutter) 8px;
  background: linear-gradient(180deg, var(--bg-abyss) 76%, rgba(5, 19, 15, .74));
  border-bottom: 1px solid var(--edge);
}

.page-faq .faq-rail__title {
  margin: 0 0 6px;
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  padding: 7px 11px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
  transition: color 200ms var(--ease), border-color 200ms var(--ease), background 200ms var(--ease);
}

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

.page-faq .faq-rail__link[data-active] {
  color: var(--ink);
  border-color: rgba(255, 106, 69, .5);
  background: rgba(255, 106, 69, .09);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--coral);
  letter-spacing: .04em;
}

/* ---------- 分组面板 ---------- */
.page-faq .faq-group {
  margin-bottom: clamp(24px, 3.6vw, 42px);
  padding: clamp(18px, 3vw, 36px);
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(14, 38, 32, .92), rgba(5, 19, 15, .94));
  box-shadow: var(--shadow-panel);
  scroll-margin-top: calc(var(--header-h) + 78px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: flex-start;
  gap: clamp(12px, 2vw, 24px);
  padding-bottom: 18px;
  border-bottom: 1px solid var(--edge);
}

.page-faq .faq-group__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: clamp(38px, 4.6vw, 62px);
  line-height: .9;
  letter-spacing: -0.04em;
  color: var(--neon);
  opacity: .24;
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(19px, 1.3vw + 14px, 26px);
  font-weight: 600;
  line-height: 1.36;
  color: var(--ink);
}

.page-faq .faq-group__verdict {
  margin: 10px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--faq-tint);
}

/* ---------- 问答折叠 ---------- */
.page-faq .qa {
  margin-top: 10px;
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  background: rgba(5, 19, 15, .5);
  transition: border-color 260ms var(--ease), background 260ms var(--ease);
}

.page-faq .qa[open] {
  border-color: rgba(58, 237, 212, .34);
  background: rgba(5, 19, 15, .88);
}

.page-faq .qa__q {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 46px 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
}

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

.page-faq .qa__q::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--neon);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 460ms var(--ease);
}

.page-faq .qa[open] .qa__q::after {
  transform: scaleX(1);
}

.page-faq .qa__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--coral);
}

.page-faq .qa__sign {
  position: absolute;
  right: 14px;
  top: 15px;
  width: 19px;
  height: 19px;
  display: grid;
  place-items: center;
  border: 1px solid var(--edge);
  border-radius: 50%;
  font-size: 0;
  line-height: 1;
  color: var(--neon);
}

.page-faq .qa__sign::before {
  content: "+";
  font-size: 13px;
}

.page-faq .qa[open] .qa__sign::before {
  content: "\2013";
}

.page-faq .qa__body {
  padding: 4px 16px 18px;
}

.page-faq .qa__row {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--faq-tint);
}

.page-faq .qa__k {
  display: inline-block;
  margin-right: 8px;
  padding: 1px 7px;
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
  vertical-align: 1px;
}

.page-faq .qa__steps-label {
  margin: 16px 0 0;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-faq .qa__steps {
  counter-reset: st;
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .qa__steps li {
  counter-increment: st;
  position: relative;
  margin-top: 10px;
  padding-left: 44px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .qa__steps li::before {
  content: counter(st, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  padding: 1px 6px;
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.4;
  color: var(--neon);
}

/* ---------- 三分支流程图 ---------- */
.page-faq .flowchart {
  margin: 22px 0 0;
  padding: 10px;
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  background: rgba(5, 19, 15, .62);
  overflow-x: auto;
}

.page-faq .flowchart__svg {
  display: block;
  width: 100%;
  min-width: 600px;
  height: auto;
}

.page-faq .flowchart__cap {
  margin: 8px 4px 2px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-branches {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

.page-faq .branch {
  padding: 16px 16px 18px;
  border: 1px solid var(--edge);
  border-top: 2px solid var(--edge);
  border-radius: var(--radius);
  background: rgba(5, 19, 15, .6);
}

.page-faq .branch:nth-child(1) {
  border-top-color: var(--coral);
}

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

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

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

.page-faq .branch__title {
  margin: 8px 0 0;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
}

.page-faq .branch__text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--faq-tint);
}

.page-faq .branch__steps {
  margin: 12px 0 0;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
}

.page-faq .branch__steps li + li {
  margin-top: 6px;
}

.page-faq .branch__steps li::marker {
  color: var(--neon);
}

.page-faq .faq-tail {
  margin: 20px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--faq-tint);
}

/* ---------- 图文补充 ---------- */
.page-faq .faq-note {
  display: grid;
  gap: 18px;
  margin-top: 22px;
  padding-top: 22px;
  border-top: 1px solid var(--edge);
}

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

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

.page-faq .faq-figure--portrait {
  max-width: 260px;
}

.page-faq .faq-figure--wide {
  max-width: 620px;
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-note__title {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
}

.page-faq .faq-note__text-p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--faq-tint);
}

.page-faq .faq-download-card {
  align-self: start;
  width: 100%;
  max-width: 260px;
  padding: 16px 18px;
  background: var(--bg-abyss);
}

.page-faq .faq-download-card__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 38px;
  line-height: 1;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-download-card__label {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 结尾 ---------- */
.page-faq .faq-cta {
  padding: clamp(24px, 4vw, 44px);
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  background:
    radial-gradient(110% 120% at 8% 100%, rgba(255, 106, 69, .14), transparent 60%),
    linear-gradient(160deg, var(--bg-night), var(--bg-abyss));
}

.page-faq .faq-cta__title {
  margin: 12px 0 0;
  font-size: clamp(22px, 2.4vw, 34px);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--ink);
  max-width: 26ch;
}

.page-faq .faq-cta__text {
  margin: 14px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--faq-tint);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-note {
    grid-template-columns: 260px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-note--reverse {
    grid-template-columns: minmax(0, 1fr) 260px;
  }

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

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1fr) 232px;
    gap: clamp(24px, 3vw, 44px);
    align-items: start;
  }

  .page-faq .faq-hero__card {
    margin-top: 6px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    display: grid;
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(28px, 3.6vw, 52px);
    align-items: start;
  }

  .page-faq .faq-rail {
    top: 28px;
    margin: 0;
    padding: 0 0 0 18px;
    border-bottom: 0;
    border-left: 1px solid var(--edge);
    background: none;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__link {
    position: relative;
    display: flex;
    padding: 9px 0 9px 14px;
    border: 0;
    border-radius: 0;
    background: none;
  }

  .page-faq .faq-rail__link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 0;
    height: 2px;
    background: var(--coral);
    transform: translateY(-50%);
    transition: width 220ms var(--ease);
  }

  .page-faq .faq-rail__link[data-active] {
    background: none;
    border-color: transparent;
  }

  .page-faq .faq-rail__link[data-active]::before {
    width: 8px;
  }

  .page-faq .faq-group {
    scroll-margin-top: 40px;
  }
}

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