.page-faq {
  --faq-rail-w: 296px;
  padding-bottom: 104px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-masthead {
  padding-top: 10px;
}

.page-faq .faq-masthead .eyebrow {
  margin: 0 0 16px;
}

.page-faq h1 {
  margin: 0;
  max-width: 20ch;
  font-size: clamp(28px, 6.6vw, 52px);
  line-height: 1.18;
  letter-spacing: .04em;
  font-weight: 800;
  color: var(--cream);
}

.page-faq .faq-lede {
  margin: 24px 0 0;
  max-width: 64ch;
  font-size: 17px;
  line-height: 1.8;
  color: rgba(242, 239, 233, .84);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-jump a {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 6px 17px;
  border: 1px solid rgba(110, 123, 133, .55);
  border-radius: 999px;
  font-size: 14px;
  letter-spacing: .03em;
  color: var(--rock);
  text-decoration: none;
  transition: color .12s ease, background-color .12s ease, border-color .12s ease;
}

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

/* ---------- 主网格 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 44px;
  margin-top: 56px;
}

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

/* ---------- 区块骨架 ---------- */
.page-faq .faq-section + .faq-section {
  margin-top: 72px;
}

.page-faq .faq-section + .faq-section::before {
  content: "";
  display: block;
  height: 1px;
  margin-bottom: 46px;
  background: var(--tide);
}

.page-faq .faq-section h2 {
  margin: 12px 0 0;
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.36;
  letter-spacing: .03em;
  font-weight: 800;
  color: var(--cream);
}

.page-faq .faq-section__lede {
  margin: 18px 0 0;
  max-width: 64ch;
  font-size: 17px;
  line-height: 1.8;
  color: rgba(242, 239, 233, .8);
}

.page-faq .faq-after {
  margin: 26px 0 0;
  max-width: 64ch;
  padding-left: 18px;
  border-left: 2px solid rgba(53, 224, 200, .5);
  font-size: 16px;
  line-height: 1.75;
  color: var(--rock);
}

.page-faq .faq-figure {
  margin: 34px 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 16px;
}

/* ---------- 三步自检 ---------- */
.page-faq .faq-steps {
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step + .faq-step {
  border-top: 1px solid rgba(110, 123, 133, .3);
}

.page-faq .faq-step__summary {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 20px 4px 20px 0;
  cursor: pointer;
  list-style: none;
  transition: color .12s ease;
}

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

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

.page-faq .faq-step__fold[open] > .faq-step__summary::after {
  content: "－";
}

.page-faq .faq-step__summary:hover .faq-step__title,
.page-faq .faq-step__summary:focus-visible .faq-step__title {
  color: var(--cyan);
}

.page-faq .faq-step__index {
  flex: none;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-faq .faq-step__index::after {
  content: "";
  display: block;
  width: 16px;
  height: 1px;
  margin-top: 7px;
  background: var(--line);
}

.page-faq .faq-step__title {
  margin: 0;
  font-size: 20px;
  line-height: 1.42;
  letter-spacing: .02em;
  font-weight: 700;
  color: var(--cream);
  transition: color .12s ease;
}

.page-faq .faq-step__panel {
  padding: 2px 34px 22px 42px;
}

.page-faq .faq-step__panel p {
  margin: 0 0 12px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--rock);
}

.page-faq .faq-step__panel p:last-child {
  margin-bottom: 0;
}

/* ---------- 诊断面板 ---------- */
.page-faq .faq-diag {
  margin-top: 44px;
  padding: 30px 26px 26px;
  border-radius: 20px;
  border: 1px solid rgba(53, 224, 200, .22);
  background:
    linear-gradient(160deg, rgba(53, 224, 200, .07), rgba(11, 27, 43, 0) 46%),
    var(--deep);
}

.page-faq .faq-diag .eyebrow {
  margin: 0 0 12px;
}

.page-faq .faq-diag h3 {
  margin: 0;
  font-size: 20px;
  line-height: 1.42;
  letter-spacing: .02em;
  font-weight: 700;
  color: var(--cream);
}

.page-faq .faq-diag__list {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(110, 123, 133, .3);
}

.page-faq .faq-diag__item {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  align-items: baseline;
  gap: 4px 12px;
  padding: 15px 0;
  border-bottom: 1px solid rgba(110, 123, 133, .3);
}

.page-faq .faq-diag__num {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
}

.page-faq .faq-diag__name {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--cream);
}

.page-faq .faq-diag__note {
  font-size: 14px;
  line-height: 1.6;
  color: var(--rock);
}

.page-faq .faq-diag__foot {
  margin: 20px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--rock);
}

/* ---------- 版本对照 ---------- */
.page-faq .faq-compare {
  display: grid;
  gap: 16px;
  margin-top: 32px;
}

.page-faq .faq-compare__card {
  padding: 22px 24px;
  border-radius: 16px;
  border: 1px solid rgba(110, 123, 133, .32);
  background: rgba(16, 42, 62, .62);
}

.page-faq .faq-compare__card--stale {
  border-left: 3px solid var(--orange);
}

.page-faq .faq-compare__card--fresh {
  border-left: 3px solid var(--moss-lift);
}

.page-faq .faq-compare__tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--rock);
}

.page-faq .faq-compare__card--stale .faq-compare__tag {
  color: var(--orange);
}

.page-faq .faq-compare__card--fresh .faq-compare__tag {
  color: var(--moss-lift);
}

.page-faq .faq-compare__version {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 22px;
  letter-spacing: .02em;
  color: var(--cream);
}

.page-faq .faq-compare__desc {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--rock);
}

/* ---------- 筛选空结果 ---------- */
.page-faq .faq-causes {
  display: grid;
  gap: 16px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-cause {
  padding: 22px 24px;
  border-radius: 16px;
  border: 1px solid rgba(110, 123, 133, .3);
  border-left: 3px solid var(--clay);
  background: linear-gradient(150deg, rgba(16, 42, 62, .94), rgba(11, 27, 43, .58));
}

.page-faq .faq-cause h3 {
  margin: 0;
  font-size: 17px;
  line-height: 1.45;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--cream);
}

.page-faq .faq-cause p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--rock);
}

/* ---------- 编号说明（轮次 / 反馈） ---------- */
.page-faq .faq-notes {
  counter-reset: faq-note;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-notes > li {
  counter-increment: faq-note;
  position: relative;
  padding: 17px 0 17px 54px;
  border-bottom: 1px solid rgba(110, 123, 133, .28);
  font-size: 16px;
  line-height: 1.75;
  color: var(--rock);
}

.page-faq .faq-notes > li:first-child {
  border-top: 1px solid rgba(110, 123, 133, .28);
}

.page-faq .faq-notes > li::before {
  content: counter(faq-note, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-faq .faq-notes strong {
  color: var(--cream);
  font-weight: 700;
}

/* ---------- 同步节点时间轴 ---------- */
.page-faq .faq-nodes {
  margin: 34px 0 0;
  padding-left: 26px;
  border-left: 1px solid rgba(110, 123, 133, .42);
}

.page-faq .faq-node {
  position: relative;
  padding-bottom: 28px;
}

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

.page-faq .faq-node::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--abyss);
  border: 2px solid var(--cyan);
}

.page-faq .faq-node--live::before {
  border-color: var(--orange);
  background: var(--orange-soft);
}

.page-faq .faq-node__time {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-faq .faq-node--live .faq-node__time {
  color: var(--orange);
}

.page-faq .faq-node__text {
  display: block;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--rock);
}

/* ---------- 反馈落地 ---------- */
.page-faq .faq-report {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  margin-top: 34px;
  padding: 24px 26px;
  border-radius: 18px;
  border: 1px solid rgba(53, 224, 200, .24);
  background:
    linear-gradient(120deg, rgba(53, 224, 200, .08), rgba(11, 27, 43, 0) 62%),
    var(--deep);
}

.page-faq .faq-report__text {
  flex: 1 1 260px;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(242, 239, 233, .84);
}

.page-faq .faq-report .btn {
  flex: none;
}

/* ---------- 结尾收束 ---------- */
.page-faq .faq-outro {
  margin-top: 72px;
  padding: 34px 26px 32px;
  border-radius: 22px;
  border: 1px solid rgba(110, 123, 133, .34);
  background:
    linear-gradient(200deg, rgba(196, 116, 79, .16), rgba(11, 27, 43, 0) 58%),
    var(--deep);
}

.page-faq .faq-outro h2 {
  margin: 0;
  font-size: clamp(21px, 3.2vw, 28px);
  line-height: 1.38;
  letter-spacing: .03em;
  font-weight: 800;
  color: var(--cream);
}

.page-faq .faq-outro p {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--rock);
}

.page-faq .faq-outro__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-outro__links a {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 9px 20px;
  border-radius: 999px;
  border: 1px solid rgba(53, 224, 200, .5);
  font-size: 15px;
  letter-spacing: .02em;
  color: var(--cyan);
  text-decoration: none;
  transition: background-color .12s ease, color .12s ease, border-color .12s ease;
}

.page-faq .faq-outro__links a:hover,
.page-faq .faq-outro__links a:focus-visible {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--abyss);
}

/* ---------- 速查侧栏 ---------- */
.page-faq .faq-rail {
  min-width: 0;
}

.page-faq .faq-rail__box {
  padding: 26px 24px 24px;
  border-radius: 20px;
  border: 1px solid rgba(110, 123, 133, .36);
  background:
    linear-gradient(180deg, rgba(199, 211, 220, .12), rgba(124, 143, 160, .05) 42%, rgba(11, 27, 43, 0) 100%),
    var(--deep);
}

.page-faq .faq-rail__box .eyebrow {
  margin: 0 0 12px;
}

.page-faq .faq-rail__title {
  margin: 0;
  font-size: 19px;
  line-height: 1.42;
  letter-spacing: .02em;
  font-weight: 700;
  color: var(--cream);
}

.page-faq .faq-rail__list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-rail__list > li {
  position: relative;
  padding: 12px 0 12px 26px;
  border-top: 1px solid rgba(110, 123, 133, .28);
}

.page-faq .faq-rail__list > li:first-child {
  border-top: 0;
}

.page-faq .faq-rail__dot {
  position: absolute;
  left: 3px;
  top: 16px;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  border: 1px solid var(--cyan);
  background: var(--cyan-soft);
}

.page-faq .faq-rail__name {
  display: block;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--cream);
}

.page-faq .faq-rail__hint {
  display: block;
  margin-top: 5px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--rock);
}

.page-faq .faq-rail__foot {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid rgba(110, 123, 133, .28);
  font-size: 14px;
  line-height: 1.68;
  color: var(--rock);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-compare {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-faq .faq-diag__item {
    grid-template-columns: 26px minmax(0, 1fr) auto;
  }

  .page-faq .faq-diag__num {
    grid-row: auto;
  }

  .page-faq .faq-diag__note {
    text-align: right;
  }

  .page-faq .faq-outro {
    padding: 40px 40px 38px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) var(--faq-rail-w);
    gap: 60px;
    align-items: start;
    margin-top: 72px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-faq .faq-step__panel {
    padding-right: 64px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump a,
  .page-faq .faq-step__title,
  .page-faq .faq-outro__links a {
    transition: none;
  }
}