.page-faq {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}

.page-faq .faq-wrap {
  max-width: var(--frame);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  background: var(--ink);
  color: var(--on-dark);
  padding: clamp(28px, 4vw, 48px) 0 clamp(44px, 6vw, 80px);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  top: -30%;
  width: 62%;
  height: 170%;
  background: radial-gradient(circle at 50% 50%, rgba(200, 52, 43, 0.24), rgba(16, 28, 48, 0) 66%);
  pointer-events: none;
}

.page-faq .faq-hero .faq-wrap {
  position: relative;
  z-index: 1;
}

.page-faq .faq-crumbs {
  margin-bottom: clamp(28px, 4vw, 48px);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.page-faq .faq-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-crumbs li + li::before {
  content: "／";
  margin-right: 8px;
  color: var(--gold);
}

.page-faq .faq-crumbs a {
  color: var(--on-dark-dim);
  text-decoration: none;
  border-bottom: 1px solid rgba(182, 194, 211, 0.4);
  padding-bottom: 1px;
}

.page-faq .faq-crumbs a:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.page-faq .faq-crumbs li[aria-current="page"] {
  color: var(--gold);
  font-family: var(--font-mono);
}

.page-faq .faq-hero__eyebrow {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-faq .faq-hero__title {
  margin: 0 0 26px;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(36px, 6.4vw, 82px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--on-dark);
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 58ch;
  font-size: 17px;
  line-height: 1.95;
  color: var(--on-dark-dim);
}

/* ---------- 分类命令栏 ---------- */

.page-faq .faq-cmd {
  background: var(--white);
  border-bottom: 1px solid var(--line);
  padding: clamp(20px, 2.6vw, 32px) 0;
}

.page-faq .faq-cmd__inner {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-faq .faq-cmd__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate);
}

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

.page-faq .chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink-soft);
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.4;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.page-faq .chip:hover {
  border-color: var(--gold);
  background: var(--white);
}

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

.page-faq .chip[aria-pressed="true"] {
  background: var(--crimson);
  border-color: var(--crimson);
  color: var(--white);
}

.page-faq .chip__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gold);
  transition: color 0.18s ease;
}

.page-faq .chip[aria-pressed="true"] .chip__num {
  color: rgba(255, 255, 255, 0.72);
}

/* ---------- 问答流 ---------- */

.page-faq .faq-stream {
  padding: clamp(36px, 5vw, 68px) 0 clamp(40px, 5vw, 80px);
}

.page-faq .qa-group {
  margin: 0 0 clamp(48px, 6vw, 92px);
}

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

.page-faq .qa-group__head {
  position: relative;
  margin-bottom: clamp(20px, 2.6vw, 30px);
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.page-faq .qa-group__head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 78px;
  height: 3px;
  background: var(--crimson);
}

.page-faq .qa-group__index {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-faq .qa-group__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(25px, 3.6vw, 42px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--ink-soft);
}

.page-faq .qa-group__intro {
  margin: 0;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.9;
  color: var(--slate);
}

/* 图片 */

.page-faq .qa-group__media {
  margin: 0 0 clamp(24px, 3vw, 36px);
  border: 1px solid var(--line);
  background: var(--white);
  overflow: hidden;
}

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

.page-faq .qa-group__media figcaption {
  padding: 12px 18px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

/* 条目 */

.page-faq .qa-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: qa;
}

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

.page-faq .qa {
  padding: 0;
}

.page-faq .qa__head {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr) 1.5rem;
  align-items: start;
  gap: 10px 12px;
  padding: 20px 0;
  cursor: pointer;
  list-style: none;
  counter-increment: qa;
  transition: color 0.18s ease;
}

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

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

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

.page-faq .qa__head:focus-visible {
  outline: 2px solid var(--crimson);
  outline-offset: 3px;
}

.page-faq .qa__num {
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-faq .qa__num::before {
  content: counter(qa, decimal-leading-zero);
}

.page-faq .qa__q {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(17px, 2.1vw, 22px);
  line-height: 1.55;
  letter-spacing: 0;
  color: var(--ink-soft);
  transition: color 0.18s ease;
}

.page-faq .qa__chev {
  position: relative;
  display: block;
  width: 14px;
  height: 14px;
  margin-top: 9px;
  justify-self: end;
}

.page-faq .qa__chev::before {
  content: "";
  position: absolute;
  top: 0;
  left: 3px;
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 7px solid var(--crimson);
  transform-origin: 5px 3.5px;
  transition: transform 0.3s ease;
}

.page-faq .qa[open] .qa__chev::before {
  transform: rotate(180deg);
}

.page-faq .qa__body {
  padding: 0 0 26px;
  animation: faq-fade 0.3s ease;
}

@keyframes faq-fade {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-faq .qa__body p {
  margin: 0 0 12px;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink);
}

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

.page-faq .qa__body ol,
.page-faq .qa__body ul {
  margin: 0 0 12px;
  padding-left: 1.3em;
  max-width: 64ch;
}

.page-faq .qa__body li {
  margin-bottom: 6px;
  font-size: 16px;
  line-height: 1.85;
}

.page-faq .qa__body a {
  color: var(--crimson);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 52, 43, 0.35);
  padding-bottom: 1px;
  transition: border-color 0.18s ease;
}

.page-faq .qa__body a:hover {
  border-bottom-color: var(--crimson);
}

/* ---------- 仍卡住？ ---------- */

.page-faq .faq-help {
  background: var(--ink);
  color: var(--on-dark);
  padding: clamp(44px, 5.6vw, 84px) 0;
}

.page-faq .faq-help__inner {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}

.page-faq .faq-help__eyebrow {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-faq .faq-help__title {
  margin: 0 0 20px;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(25px, 3.6vw, 42px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--on-dark);
}

.page-faq .faq-help__lede {
  margin: 0 0 22px;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.9;
  color: var(--on-dark-dim);
}

.page-faq .faq-help__list {
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq .faq-help__list li {
  position: relative;
  padding-left: 22px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--on-dark);
}

.page-faq .faq-help__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 1px;
  background: var(--crimson);
}

.page-faq .faq-help__foot {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--on-dark-dim);
}

.page-faq .faq-help__foot .mono {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--on-dark);
  word-break: break-all;
}

.page-faq .faq-help__foot a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(192, 138, 46, 0.5);
  padding-bottom: 1px;
}

.page-faq .faq-help__foot a:hover {
  border-bottom-color: var(--gold);
}

.page-faq .faq-help__aside {
  border-top: 1px solid rgba(182, 194, 211, 0.22);
  padding-top: 22px;
}

.page-faq .faq-help__aside-label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-faq .faq-help__aside-value {
  margin: 0 0 14px;
  font-size: clamp(18px, 2.2vw, 24px);
  color: var(--on-dark);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-help__aside-note {
  margin: 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--on-dark-dim);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .qa__head {
    grid-template-columns: 3.2rem minmax(0, 1fr) 1.6rem;
    gap: 12px 18px;
    padding: 22px 0;
  }

  .page-faq .qa__body {
    padding-left: 3.2rem;
  }

  .page-faq .qa__body p,
  .page-faq .qa__body ol,
  .page-faq .qa__body ul {
    max-width: 60ch;
  }

  .page-faq .faq-cmd__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }

  .page-faq .qa-group__media {
    border-left: 78px solid var(--sand);
  }
}

@media (min-width: 1024px) {
  .page-faq .qa-group__head {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 14px 56px;
    align-items: end;
  }

  .page-faq .qa-group__index {
    grid-column: 1 / -1;
    margin-bottom: 4px;
  }

  .page-faq .qa-group__title {
    grid-column: 1;
    margin-bottom: 0;
  }

  .page-faq .qa-group__intro {
    grid-column: 2;
    padding-bottom: 4px;
  }

  .page-faq .qa__head {
    grid-template-columns: 4rem minmax(0, 1fr) 1.8rem;
  }

  .page-faq .qa__body {
    padding-left: 4rem;
  }

  .page-faq .faq-help__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-help__aside {
    border-top: 0;
    border-left: 1px solid rgba(182, 194, 211, 0.22);
    padding-top: 0;
    padding-left: 32px;
  }
}

@media (min-width: 1280px) {
  .page-faq .qa-group__media {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 260px;
    align-items: stretch;
  }

  .page-faq .qa-group__media img {
    height: 100%;
  }

  .page-faq .qa-group__media figcaption {
    border-top: 0;
    border-left: 1px solid var(--line);
    display: flex;
    align-items: center;
    padding: 18px 22px;
    line-height: 1.8;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__body {
    animation: none;
  }

  .page-faq .qa__chev::before,
  .page-faq .chip {
    transition: none;
  }
}