.page-faq {
  --faq-line: rgba(244, 239, 230, 0.14);
  --faq-line-soft: rgba(244, 239, 230, 0.08);
  --faq-surface: rgba(255, 255, 255, 0.045);
  display: block;
}

/* ---------- 海报式页头 ---------- */
.page-faq .faq-poster {
  position: relative;
  overflow: hidden;
  margin-top: 18px;
  padding: clamp(30px, 7vw, 68px) 0 clamp(26px, 5vw, 54px);
  border-top: 1px solid var(--faq-line);
  border-bottom: 1px solid var(--faq-line);
  background:
    radial-gradient(120% 100% at 6% 0%, rgba(53, 242, 208, 0.15), transparent 58%),
    radial-gradient(90% 80% at 100% 100%, rgba(255, 107, 44, 0.13), transparent 62%),
    var(--ink-900);
}

.page-faq .faq-poster__ghost {
  position: absolute;
  top: -0.34em;
  right: -0.02em;
  font-family: var(--font-display);
  font-size: clamp(190px, 42vw, 420px);
  line-height: 1;
  letter-spacing: -0.06em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(53, 242, 208, 0.16);
  pointer-events: none;
  user-select: none;
}

.page-faq .faq-poster__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-faq .faq-poster h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 8.4vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.04em;
  color: var(--paper);
}

.page-faq .faq-poster__lede {
  margin: 18px 0 0;
  max-width: 44ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.75;
  color: var(--text-dim);
}

.page-faq .faq-poster__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-poster__panel {
  border-radius: var(--radius-lg);
  border: 1px solid var(--faq-line);
  background: var(--glass);
  backdrop-filter: blur(10px);
  padding: 20px 22px;
}

.page-faq .faq-poster__panel-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.page-faq .faq-poster__version {
  margin: 6px 0 16px;
  font-family: var(--font-mono);
  font-size: clamp(44px, 10vw, 64px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--yellow);
}

.page-faq .faq-facts {
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--faq-line-soft);
  display: grid;
  gap: 10px;
}

.page-faq .faq-facts > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-faq .faq-facts dt {
  font-size: 13px;
  color: var(--text-dim);
}

.page-faq .faq-facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--paper);
  text-align: right;
}

@media (min-width: 900px) {
  .page-faq .faq-poster__inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(268px, 0.85fr);
    align-items: end;
  }
}

/* ---------- 顶部主视觉 ---------- */
.page-faq .faq-visual {
  padding: clamp(24px, 5vw, 44px) 0 0;
}

.page-faq .faq-visual__media .media__frame {
  border-radius: var(--radius-lg);
  border: 1px solid var(--faq-line);
  overflow: hidden;
  background: linear-gradient(150deg, var(--ink-700), var(--ink-900));
}

.page-faq .faq-visual__media img,
.page-faq .faq-steps__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-faq .faq-visual__media img {
  aspect-ratio: 12 / 7;
}

/* ---------- 3 步上手 ---------- */
.page-faq .faq-steps {
  padding: clamp(38px, 7vw, 72px) 0 clamp(10px, 2vw, 24px);
}

.page-faq .faq-steps__lede {
  max-width: 62ch;
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-faq .faq-steps__list {
  list-style: none;
  margin: clamp(22px, 4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-faq .faq-step {
  position: relative;
  padding: 22px 20px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--faq-line);
  border-top: 3px solid var(--neon);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02));
}

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

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

.page-faq .faq-step__num {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--neon);
  background: rgba(53, 242, 208, 0.14);
}

.page-faq .faq-step:nth-child(2) .faq-step__num {
  color: var(--orange);
  background: rgba(255, 107, 44, 0.16);
}

.page-faq .faq-step:nth-child(3) .faq-step__num {
  color: var(--yellow);
  background: rgba(255, 209, 102, 0.16);
}

.page-faq .faq-step h3 {
  margin: 14px 0 8px;
  font-size: clamp(18px, 2.3vw, 21px);
  line-height: 1.35;
  color: var(--paper);
}

.page-faq .faq-step p {
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--text-dim);
}

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

.page-faq .faq-step__meta {
  font-size: 13.5px;
}

.page-faq .faq-step__meta a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 208, 0.35);
}

.page-faq .faq-steps__media {
  margin: clamp(26px, 4vw, 40px) 0 0;
  max-width: 660px;
}

.page-faq .faq-steps__media .media__frame {
  border-radius: var(--radius-lg);
  border: 1px solid var(--faq-line);
  overflow: hidden;
  background: linear-gradient(160deg, var(--ink-700), var(--ink-900));
}

.page-faq .faq-steps__media img {
  aspect-ratio: 4 / 3;
}

@media (min-width: 860px) {
  .page-faq .faq-steps__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }
}

/* ---------- 主体：左侧索引 + 右侧答案 ---------- */
.page-faq .faq-body {
  padding: clamp(34px, 6vw, 68px) 0 clamp(44px, 8vw, 90px);
}

.page-faq .faq-body .grid-12 {
  row-gap: clamp(24px, 4vw, 36px);
}

.page-faq .faq-index {
  border-radius: var(--radius-lg);
  border: 1px solid var(--faq-line);
  background: var(--glass);
  padding: 18px 18px 20px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--neon);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.page-faq .faq-index__link {
  display: block;
  padding: 9px 10px;
  border-radius: 10px;
  font-size: 14.5px;
  color: var(--text);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--speed) var(--ease), background var(--speed) var(--ease),
    border-color var(--speed) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: rgba(255, 255, 255, 0.06);
  color: var(--paper);
}

.page-faq .faq-index__link.is-current {
  color: var(--neon);
  background: rgba(53, 242, 208, 0.1);
  border-left-color: var(--neon);
}

.page-faq .faq-index__note {
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--faq-line-soft);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
}

@media (min-width: 960px) {
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    align-self: start;
  }
}

/* ---------- 问答区块 ---------- */
.page-faq .faq-block {
  padding-bottom: clamp(26px, 4vw, 38px);
  margin-bottom: clamp(26px, 4vw, 38px);
  border-bottom: 1px solid var(--faq-line-soft);
}

.page-faq .faq-block:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-block__head h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-block__lede {
  margin: 12px 0 0;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-faq .faq-block__list {
  margin-top: clamp(18px, 3vw, 26px);
}

.page-faq .qa {
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  background: var(--faq-surface);
  overflow: hidden;
  transition: border-color var(--speed) var(--ease), background var(--speed) var(--ease);
}

.page-faq .qa + .qa {
  margin-top: 10px;
}

.page-faq .qa[open] {
  border-color: rgba(53, 242, 208, 0.34);
  background: rgba(53, 242, 208, 0.05);
}

.page-faq .qa__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
}

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

.page-faq .qa__q::marker {
  content: "";
}

.page-faq .qa__icon {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
}

.page-faq .qa__icon::before,
.page-faq .qa__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--neon);
  transform: translate(-50%, -50%);
}

.page-faq .qa__icon::before {
  width: 14px;
  height: 2px;
}

.page-faq .qa__icon::after {
  width: 2px;
  height: 14px;
  transition: transform var(--speed) var(--ease);
}

.page-faq .qa[open] .qa__icon::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .qa__a {
  padding: 0 16px 16px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-faq .qa__a p {
  margin: 0 0 8px;
}

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

.page-faq .qa__a a {
  color: var(--neon);
  text-decoration: underline;
  text-decoration-color: rgba(53, 242, 208, 0.4);
  text-underline-offset: 2px;
}

/* ---------- 版本数字条 ---------- */
.page-faq .version-strip {
  display: grid;
  gap: 12px;
  margin: clamp(18px, 3vw, 26px) 0 0;
}

.page-faq .version-cell {
  border-radius: var(--radius);
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--yellow);
  background: linear-gradient(160deg, rgba(255, 209, 102, 0.12), rgba(255, 255, 255, 0.02));
  padding: 14px 16px;
}

.page-faq .version-cell__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 30px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--yellow);
}

.page-faq .version-cell__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-dim);
}

@media (min-width: 620px) {
  .page-faq .version-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 联系卡 ---------- */
.page-faq .contact-card {
  margin-top: clamp(18px, 3vw, 26px);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 107, 44, 0.3);
  background: linear-gradient(150deg, rgba(255, 107, 44, 0.14), rgba(255, 255, 255, 0.02));
  padding: 20px 20px 18px;
}

.page-faq .contact-card__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .contact-card__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(244, 239, 230, 0.1);
}

.page-faq .contact-card__list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .contact-card__key {
  flex: 0 0 84px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}

.page-faq .contact-card__val {
  font-size: 15px;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .contact-card__note {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--text-dim);
}

/* ---------- 进入视口 ---------- */
.page-faq [data-reveal] {
  opacity: 1;
}

@media (prefers-reduced-motion: no-preference) {
  .page-faq [data-reveal-ready="true"] {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 420ms var(--ease), transform 420ms var(--ease);
  }

  .page-faq [data-reveal-ready="true"].is-visible {
    opacity: 1;
    transform: none;
  }
}

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

/* ---------- 窄屏收束 ---------- */
@media (max-width: 480px) {
  .page-faq .faq-poster__actions .btn {
    flex: 1 1 auto;
    text-align: center;
  }

  .page-faq .contact-card__key {
    flex-basis: 100%;
  }
}