.page-faq {
  background: var(--ink-0);
  color: var(--text);
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(28px, 5vw, 48px) 0 0;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(128deg, rgba(0, 229, 199, 0.14) 0%, rgba(0, 229, 199, 0) 44%),
    var(--ink-0);
}

.page-faq .breadcrumb {
  margin-bottom: clamp(28px, 5vw, 48px);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: end;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(34px, 6.2vw, 60px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-hero__title em {
  font-style: normal;
  color: var(--cyan);
  display: inline-block;
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 48ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-hero__panel {
  border: 1px solid var(--line-strong);
  border-top: 2px solid var(--cyan);
  background: var(--ink-1);
  padding: 20px 20px 18px;
}

.page-faq .faq-hero__panel-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-faq .faq-price-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-price-row:first-of-type {
  border-top: 0;
}

.page-faq .faq-price-row__label {
  font-size: 14px;
  color: var(--muted);
}

.page-faq .faq-price-row__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 21px;
  color: var(--cyan);
}

.page-faq .faq-price-row__value--hot {
  color: var(--orange);
}

.page-faq .faq-hero__panel-link {
  display: inline-block;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  width: 100%;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--lime);
  text-decoration: none;
}

.page-faq .faq-hero__panel-link:hover {
  color: var(--cyan);
}

.page-faq .faq-hero__media {
  margin-top: clamp(28px, 5vw, 52px);
  padding-bottom: clamp(28px, 5vw, 52px);
}

.page-faq .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 分类说明 ---------- */
.page-faq .faq-intro {
  padding: clamp(52px, 8vw, 96px) 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-intro__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
}

.page-faq .faq-intro__text .serif-title {
  margin: 12px 0 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(24px, 3.8vw, 34px);
  line-height: 1.28;
  color: var(--text);
}

.page-faq .faq-intro__p {
  margin: 16px 0 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-intro__text .btn {
  margin-top: 24px;
}

/* ---------- 索引 + 问答 ---------- */
.page-faq .faq-board {
  padding: clamp(44px, 7vw, 88px) 0 clamp(56px, 9vw, 112px);
}

.page-faq .faq-board__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__item {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 10px 14px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  white-space: nowrap;
  transition: border-color 150ms ease, color 150ms ease, background 150ms ease;
}

.page-faq .faq-index__item:hover,
.page-faq .faq-index__item:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(0, 229, 199, 0.07);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
}

.page-faq .faq-index__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--lime);
}

/* ---------- 问答组 ---------- */
.page-faq .faq-group + .faq-group {
  margin-top: clamp(40px, 6vw, 72px);
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--line-strong);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(21px, 3.4vw, 29px);
  line-height: 1.3;
  color: var(--text);
}

.page-faq .faq-group__note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

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

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  min-height: 44px;
  padding: 18px 0;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
  transition: color 150ms ease;
}

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

.page-faq .qa__q::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.1;
  color: var(--cyan);
}

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

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

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

.page-faq .qa__a {
  padding: 0 0 18px;
  animation: faq-answer-in 200ms ease-out both;
}

.page-faq .qa__a p {
  margin: 0;
  padding: 14px 16px;
  border-left: 2px solid var(--cyan);
  background: var(--ink-deep);
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

@keyframes faq-answer-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.page-faq .faq-group__foot {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-group__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 199, 0.45);
}

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

/* ---------- 联络 ---------- */
.page-faq .faq-help {
  padding: clamp(48px, 8vw, 96px) 0;
  background: var(--ink-1);
  border-top: 1px solid var(--line);
}

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-faq .faq-help__text .serif-title {
  margin: 12px 0 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(23px, 3.6vw, 32px);
  line-height: 1.28;
  color: var(--text);
}

.page-faq .faq-help__p {
  margin: 16px 0 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-help__text .btn {
  margin-top: 22px;
  margin-right: 8px;
}

.page-faq .faq-help__panel {
  border: 1px solid var(--line-strong);
  border-left: 2px solid var(--orange);
  background: var(--ink-0);
  padding: 8px 20px 20px;
}

.page-faq .faq-help__row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-help__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-faq .faq-help__value {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  word-break: break-word;
}

.page-faq .faq-help__row:nth-child(4) .faq-help__value {
  font-family: var(--font-mono);
  color: var(--lime);
}

.page-faq .faq-help__tip {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-help__tip a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 199, 0.45);
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.75fr);
  }

  .page-faq .faq-intro__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
    align-items: center;
  }

  .page-faq .faq-board__grid {
    grid-template-columns: 246px minmax(0, 1fr);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 92px;
  }

  .page-faq .faq-index__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__list li + li {
    margin-top: 8px;
  }

  .page-faq .faq-index__item {
    white-space: normal;
    padding: 12px 14px;
    border-color: var(--line);
  }

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

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
}

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

  .page-faq .qa__q,
  .page-faq .faq-index__item {
    transition: none;
  }
}