/* ===== 使用指南 /guide/ ===== */

.page-faq {
  --faq-pad: clamp(18px, 3.4vw, 48px);
  --faq-sticky: clamp(72px, 10vh, 104px);
  background: var(--paper);
  color: var(--graphite);
}

.page-faq .crumbs {
  padding-block: clamp(14px, 2vw, 22px);
}

/* ---------- 首屏框景 ---------- */

.page-faq .faq-hero {
  padding-block: clamp(8px, 1.6vw, 16px) clamp(24px, 4vw, 44px);
}

.page-faq .faq-hero__frame {
  position: relative;
  border: 1px solid var(--ink);
  padding: var(--faq-pad);
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
  background: var(--paper);
}

.page-faq .faq-hero__frame::before,
.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  width: 52px;
  height: 52px;
  border: 1px solid var(--gold);
  pointer-events: none;
}

.page-faq .faq-hero__frame::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-faq .faq-hero__frame::after {
  bottom: -1px;
  right: -1px;
  border-left: 0;
  border-top: 0;
}

.page-faq .faq-hero__copy {
  display: grid;
  gap: clamp(10px, 1.6vw, 18px);
  max-width: 74ch;
}

.page-faq .faq-hero__copy .eyebrow {
  color: var(--moss);
}

.page-faq .faq-hero__copy h1 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(30px, 4.4vw, 56px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-hero__copy .lede {
  margin: 0;
  max-width: 64ch;
  font-size: clamp(15.5px, 1.2vw, 17.5px);
  line-height: 1.75;
  color: var(--graphite);
}

.page-faq .faq-hero__figure {
  margin: 0;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--moss-bg);
  border-radius: var(--radius);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 数字带 ---------- */

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.page-faq .faq-stat {
  padding: clamp(14px, 2.2vw, 24px);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 4px;
  align-content: start;
}

.page-faq .faq-stat__n {
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.1;
  font-weight: 700;
  color: var(--moss);
  letter-spacing: 0.02em;
}

.page-faq .faq-stat__l {
  font-size: 13px;
  line-height: 1.5;
  color: var(--rock);
}

/* ---------- 主体布局：索引 + 手风琴 ---------- */

.page-faq .faq-layout {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  padding-block: clamp(32px, 5vw, 72px);
}

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

.page-faq .faq-side__inner {
  display: grid;
  gap: 14px;
}

.page-faq .faq-side__inner .eyebrow {
  color: var(--rock);
  margin: 0;
}

.page-faq .faq-side__filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-side__filter .chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 12px;
  border-radius: var(--radius);
  font-size: 13.5px;
  line-height: 1.3;
}

.page-faq .faq-side__filter .chip .mono {
  font-size: 12px;
  letter-spacing: 0.02em;
  opacity: 0.72;
}

.page-faq .faq-side__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--rock);
  border-left: 2px solid var(--gold);
  padding-left: 10px;
}

/* ---------- 分组 ---------- */

.page-faq .faq-list {
  min-width: 0;
  display: grid;
}

.page-faq .faq-group {
  border-top: 1px solid var(--ink);
  padding-top: clamp(16px, 2.2vw, 24px);
  margin-bottom: clamp(34px, 5vw, 60px);
}

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

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: clamp(6px, 1vw, 12px);
}

.page-faq .faq-group__idx {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(22px, 2.8vw, 32px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-group__count {
  margin-left: auto;
  font-size: 12.5px;
  color: var(--rock);
  letter-spacing: 0.02em;
}

.page-faq .faq-group__list {
  display: grid;
}

/* ---------- 单条问答 ---------- */

.page-faq .qa {
  border-bottom: 1px solid var(--line);
}

.page-faq .qa__q {
  display: flex;
  align-items: baseline;
  gap: 14px;
  min-height: 44px;
  padding: 15px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--sans);
  font-size: clamp(15.5px, 1.15vw, 17px);
  font-weight: 600;
  line-height: 1.55;
  color: var(--graphite);
  transition: color var(--speed) ease;
}

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

.page-faq .qa__q:hover {
  color: var(--moss);
}

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--moss);
  outline-offset: 2px;
}

.page-faq .qa__num {
  flex: 0 0 auto;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--moss);
  padding-top: 3px;
}

.page-faq .qa__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa__q::after {
  flex: 0 0 auto;
  content: "+";
  font-family: var(--mono);
  font-size: 16px;
  line-height: 1;
  color: var(--moss);
  margin-left: auto;
  align-self: center;
}

.page-faq .qa[open] > .qa__q::after {
  content: "\2212";
}

.page-faq .qa[open] > .qa__q {
  color: var(--ink);
}

.page-faq .qa__a {
  position: relative;
  padding: 0 0 20px clamp(28px, 6vw, 46px);
}

.page-faq .qa__a::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 2px;
  bottom: 20px;
  width: 1px;
  background: var(--line);
}

.page-faq .qa__a p {
  margin: 0 0 10px;
  font-size: clamp(15px, 1.05vw, 16.5px);
  line-height: 1.78;
  color: var(--graphite);
  max-width: 70ch;
}

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

.page-faq .qa__steps {
  list-style: none;
  counter-reset: faqstep;
  margin: 12px 0 12px;
  padding: 0;
  display: grid;
  gap: 10px;
  max-width: 70ch;
}

.page-faq .qa__steps li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: clamp(14.5px, 1vw, 16px);
  line-height: 1.7;
  color: var(--graphite);
}

.page-faq .qa__steps li::before {
  content: counter(faqstep);
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  margin-top: 3px;
  border-radius: var(--radius);
  background: var(--moss);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 700;
  line-height: 1;
}

/* ---------- 兜底通道 ---------- */

.page-faq .faq-resolve {
  background: var(--ink);
  color: var(--paper);
  margin-top: clamp(16px, 3vw, 40px);
  padding-block: clamp(38px, 5.5vw, 76px);
}

.page-faq .faq-resolve__inner {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: center;
}

.page-faq .faq-resolve__copy {
  display: grid;
  gap: clamp(10px, 1.6vw, 18px);
  min-width: 0;
}

.page-faq .faq-resolve__copy .eyebrow {
  margin: 0;
  color: var(--vivid);
}

.page-faq .faq-resolve__copy h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(23px, 3.1vw, 38px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-resolve__copy > p {
  margin: 0;
  max-width: 58ch;
  font-size: clamp(15px, 1.05vw, 16.5px);
  line-height: 1.75;
  color: rgba(245, 242, 233, 0.76);
}

.page-faq .faq-resolve__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-faq .faq-resolve__list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding-top: 14px;
  border-top: 1px solid rgba(201, 210, 204, 0.28);
}

.page-faq .faq-resolve__list .qa__num {
  color: var(--gold);
  padding-top: 2px;
}

.page-faq .faq-resolve__list strong {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
  margin-bottom: 4px;
}

.page-faq .faq-resolve__list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(245, 242, 233, 0.74);
  max-width: 56ch;
}

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

.page-faq .faq-resolve__actions .btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border-radius: var(--radius);
}

.page-faq .faq-resolve__media {
  margin: 0;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(201, 210, 204, 0.34);
  background: rgba(245, 242, 233, 0.06);
  border-radius: var(--radius);
}

.page-faq .faq-resolve__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 窄屏 ---------- */

@media (max-width: 639px) {
  .page-faq .faq-hero__frame {
    padding: 18px;
  }

  .page-faq .faq-hero__frame::before,
  .page-faq .faq-hero__frame::after {
    width: 32px;
    height: 32px;
  }

  .page-faq .faq-side__filter .chip {
    flex: 1 1 auto;
    justify-content: space-between;
  }

  .page-faq .qa__q {
    gap: 10px;
  }

  .page-faq .qa__a {
    padding-left: 26px;
  }

  .page-faq .qa__a::before {
    left: 3px;
  }
}

/* ---------- 平板与桌面 ---------- */

@media (min-width: 768px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(218px, 274px) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-side {
    position: sticky;
    top: var(--faq-sticky);
  }

  .page-faq .faq-side__filter {
    flex-direction: column;
    flex-wrap: nowrap;
  }

  .page-faq .faq-side__filter .chip {
    width: 100%;
    justify-content: space-between;
  }

  .page-faq .faq-resolve__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.8fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__q {
    transition: none;
  }
}
</main>