.page-faq {
  --faq-cut: 14px;
  --faq-gap: 10px;
  padding-bottom: 104px;
}

/* ── 首屏 ───────────────────────────── */
.page-faq .faq-hero {
  padding-block: 32px 48px;
}
.page-faq .faq-hero__inner {
  display: grid;
  gap: 20px;
  max-width: 940px;
}
.page-faq .faq-hero__title {
  font-size: clamp(30px, 7.6vw, 62px);
  line-height: 1.16;
  letter-spacing: .02em;
  margin: 0;
  color: var(--moon);
}
.page-faq .faq-hero__lead {
  max-width: 62ch;
  color: var(--dust);
}

/* ── 分段索引 ───────────────────────── */
.page-faq .faq-nav {
  padding-block: 0 8px;
}
.page-faq .faq-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.page-faq .faq-nav__item {
  background: var(--ink-night);
}
.page-faq .faq-nav__link {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "num text"
    "num desc";
  align-items: center;
  gap: 2px 14px;
  padding: 14px 16px;
  text-decoration: none;
  color: var(--moon);
  transition: background .25s var(--ease), color .25s var(--ease);
}
.page-faq .faq-nav__link:hover,
.page-faq .faq-nav__link:focus-visible {
  background: var(--ink-stand);
  color: var(--gold-soft);
}
.page-faq .faq-nav__num {
  grid-area: num;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}
.page-faq .faq-nav__text {
  grid-area: text;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .04em;
}
.page-faq .faq-nav__desc {
  grid-area: desc;
  font-size: 12.5px;
  color: var(--dust);
  line-height: 1.6;
}

/* ── 分区块 ─────────────────────────── */
.page-faq .faq-block {
  padding-block: 56px;
  border-top: 1px solid var(--line);
}
.page-faq .faq-block__head {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  margin-bottom: 28px;
}
.page-faq .faq-block__num {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .3em;
  line-height: 1;
  color: var(--gold);
  padding-top: 4px;
  flex: none;
  border-left: 1px solid var(--gold-line);
  padding-left: 8px;
}
.page-faq .faq-block__headtext {
  display: grid;
  gap: 10px;
}
.page-faq .faq-block__headtext .h-section {
  margin: 0;
}
.page-faq .faq-block__note {
  margin: 0;
  max-width: 56ch;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--dust);
}

/* ── 折叠问答 ───────────────────────── */
.page-faq .faq-list {
  display: grid;
  gap: var(--faq-gap);
  max-width: 900px;
}
.page-faq .qa {
  position: relative;
  background: var(--ink-night);
  border: 1px solid var(--line);
  transition: border-color .25s var(--ease), background .25s var(--ease);
}
.page-faq .qa::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 100%;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(99, 210, 227, 0));
  opacity: 0;
  transition: bottom .4s var(--ease), opacity .3s var(--ease);
}
.page-faq .qa[open] {
  border-color: var(--line-strong);
  background: var(--ink-stand);
}
.page-faq .qa[open]::before {
  bottom: 0;
  opacity: 1;
}
.page-faq .qa__q {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: start;
  gap: 14px;
  padding: 17px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.65;
  letter-spacing: .01em;
  color: var(--moon);
  background: var(--ink-night);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
  transition: color .25s var(--ease), background .25s var(--ease);
}
.page-faq .qa[open] .qa__q {
  background: var(--ink-stand);
  color: var(--gold-soft);
}
.page-faq .qa__q::-webkit-details-marker {
  display: none;
}
.page-faq .qa__q:hover,
.page-faq .qa__q:focus-visible {
  color: var(--gold-soft);
}
.page-faq .qa__sign {
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--cyan);
  padding-top: 3px;
  transition: transform .3s var(--ease), color .25s var(--ease);
}
.page-faq .qa[open] .qa__sign {
  transform: rotate(45deg);
  color: var(--gold);
}
.page-faq .qa__a {
  padding: 4px 18px 20px;
  border-top: 1px solid var(--line);
  margin-top: 0;
}
.page-faq .qa__a p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--dust);
  max-width: 62ch;
}
.page-faq .qa__a p:first-child {
  margin-top: 14px;
}
.page-faq .qa__a a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.page-faq .qa__a a:hover {
  color: var(--gold-soft);
}

/* ── 字段定义浮层 ───────────────────── */
.page-faq .field {
  position: relative;
  font-family: var(--font-mono);
  font-size: .93em;
  color: var(--gold-soft);
  border-bottom: 1px dashed var(--gold-line);
  cursor: help;
  outline-offset: 3px;
}
.page-faq .field::after {
  content: attr(data-def);
  position: absolute;
  left: 0;
  bottom: calc(100% + 10px);
  width: max-content;
  max-width: 236px;
  padding: 10px 12px;
  background: var(--ink-void);
  border: 1px solid var(--gold-line);
  color: var(--moon);
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 400;
  line-height: 1.7;
  letter-spacing: 0;
  white-space: normal;
  text-align: left;
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity .2s var(--ease), transform .2s var(--ease), visibility .2s;
  z-index: 6;
  pointer-events: none;
}
.page-faq .field:hover::after,
.page-faq .field:focus::after,
.page-faq .field:focus-visible::after {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ── 使用段：列表 + 竖版示意 ─────────── */
.page-faq .faq-use {
  display: grid;
  gap: 32px;
}
.page-faq .faq-use__figure {
  margin: 0;
  align-self: start;
}

/* ── 中部刻度带 ─────────────────────── */
.page-faq .faq-band {
  padding-block: 56px;
  background:
    radial-gradient(120% 140% at 88% -10%, rgba(99, 210, 227, .1), transparent 58%),
    linear-gradient(165deg, var(--ink-night) 0%, var(--ink-stand) 52%, var(--ink-night) 100%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-band__intro {
  display: grid;
  gap: 14px;
  max-width: 660px;
}
.page-faq .faq-band__intro .h-section {
  margin: 0;
}
.page-faq .faq-band__lead {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--dust);
  max-width: 58ch;
}
.page-faq .faq-band__figure {
  margin: 32px 0 0;
}

/* ── 补时刻度 ───────────────────────── */
.page-faq .faq-ruler {
  position: relative;
  margin-top: 36px;
  padding-top: 8px;
}
.page-faq .faq-ruler__axis {
  display: none;
}
.page-faq .faq-ruler__marks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}
.page-faq .faq-ruler__mark {
  position: relative;
  padding-left: 22px;
}
.page-faq .faq-ruler__dot {
  position: absolute;
  left: 0;
  top: 5px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ink-void);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(240, 190, 76, .12);
}
.page-faq .faq-ruler__mark:last-child .faq-ruler__dot {
  border-color: var(--stoppage);
  box-shadow: 0 0 0 4px rgba(226, 87, 43, .14);
}
.page-faq .faq-ruler__name {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold);
}
.page-faq .faq-ruler__mark:last-child .faq-ruler__name {
  color: var(--stoppage);
}
.page-faq .faq-ruler__desc {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--dust);
}

/* ── 边界段 ─────────────────────────── */
.page-faq .faq-scope__grid {
  display: grid;
  gap: 28px;
}
.page-faq .faq-scope__aside {
  display: grid;
  gap: 12px;
  align-content: start;
}
.page-faq .faq-scope__aside .h-section {
  margin: 0;
}
.page-faq .faq-scope__lead {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--dust);
  max-width: 44ch;
}
.page-faq .faq-scope__lead a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-faq .faq-scope__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.page-faq .faq-scope__item {
  position: relative;
  background: var(--ink-night);
  padding: 15px 18px 15px 38px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--dust);
}
.page-faq .faq-scope__item::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 24px;
  width: 8px;
  height: 8px;
  background: var(--stoppage);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}
.page-faq .faq-scope__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  margin-top: 32px;
}

/* ── 平板 ───────────────────────────── */
@media (min-width: 720px) {
  .page-faq .faq-nav__list {
    grid-template-columns: 1fr 1fr;
  }
  .page-faq .faq-hero {
    padding-block: 48px 64px;
  }
  .page-faq .faq-scope__list {
    grid-template-columns: 1fr 1fr;
  }
}

/* ── 桌面 ───────────────────────────── */
@media (min-width: 900px) {
  .page-faq .faq-nav__list {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-faq .faq-nav__link {
    grid-template-columns: auto 1fr;
    padding: 18px 20px;
  }
  .page-faq .faq-block {
    padding-block: 76px;
  }
  .page-faq .faq-use {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 48px;
    align-items: start;
  }
  .page-faq .faq-use__figure {
    position: sticky;
    top: calc(var(--top) + 24px);
  }
  .page-faq .faq-band {
    padding-block: 80px;
  }
  .page-faq .faq-band__intro {
    grid-template-columns: auto 1fr;
    grid-template-areas:
      "eyebrow title"
      "eyebrow lead";
    align-items: start;
    gap: 8px 24px;
    max-width: none;
  }
  .page-faq .faq-band__intro .eyebrow {
    grid-area: eyebrow;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: .3em;
    padding-top: 4px;
  }
  .page-faq .faq-band__intro .h-section {
    grid-area: title;
  }
  .page-faq .faq-band__lead {
    grid-area: lead;
  }

  /* 刻度转为横向绝对定位 */
  .page-faq .faq-ruler {
    margin-top: 44px;
    height: 176px;
    padding-top: 0;
  }
  .page-faq .faq-ruler__axis {
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    top: 52px;
    height: 1px;
    background: var(--line-strong);
  }
  .page-faq .faq-ruler__axis::after {
    content: "";
    position: absolute;
    inset: -7px 0;
    background-image: repeating-linear-gradient(
      90deg,
      rgba(159, 176, 200, .32) 0 1px,
      transparent 1px 22px
    );
  }
  .page-faq .faq-ruler__marks {
    display: block;
  }
  .page-faq .faq-ruler__mark {
    position: absolute;
    top: 0;
    left: var(--x);
    transform: translateX(-50%);
    width: 150px;
    padding-left: 0;
    text-align: center;
  }
  .page-faq .faq-ruler__dot {
    left: 50%;
    top: 52px;
    transform: translate(-50%, -50%);
  }
  .page-faq .faq-ruler__name {
    margin-top: 74px;
  }
  .page-faq .faq-ruler__desc {
    margin-top: 6px;
  }

  .page-faq .faq-scope__grid {
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }
}

@media (min-width: 1120px) {
  .page-faq .faq-block {
    padding-block: 88px;
  }
  .page-faq .faq-list {
    max-width: 940px;
  }
  .page-faq .faq-use {
    grid-template-columns: minmax(0, 1fr) 340px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa::before,
  .page-faq .qa__q,
  .page-faq .qa__sign,
  .page-faq .field::after,
  .page-faq .faq-nav__link {
    transition: none;
  }
}
</style>

.page-faq {
  --x: inherit;
}