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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(26px, 4vw, 52px) 0 clamp(34px, 4.6vw, 62px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(18, 58, 60, 0.55), rgba(6, 9, 12, 0) 62%),
    linear-gradient(180deg, rgba(34, 224, 214, 0.05), rgba(6, 9, 12, 0) 55%),
    var(--ink);
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3vw, 44px);
  margin-top: clamp(20px, 3vw, 34px);
}

.page-faq .faq-hero-copy .h1 {
  max-width: 22ch;
  margin: 0 0 18px;
}

.page-faq .faq-hero-copy .lede {
  max-width: 46ch;
  color: var(--muted);
}

.page-faq .faq-hero-media {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  background: var(--panel);
  overflow: hidden;
}

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

.page-faq .faq-hero-media::after,
.page-faq .faq-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(34, 224, 214, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 224, 214, 0.12) 1px, transparent 1px);
  background-size: 44px 44px;
  mix-blend-mode: screen;
}

.page-faq .faq-hero-media figcaption {
  position: relative;
  z-index: 1;
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  background: var(--panel);
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .faq-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 0;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-faq .faq-stat {
  flex: 1 1 150px;
  min-width: 0;
  padding-right: 18px;
}

.page-faq .stat-num {
  display: block;
  font-family: var(--mono);
  font-size: clamp(19px, 2.2vw, 26px);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.2;
  color: var(--white);
}

.page-faq .stat-label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 主体：左目录 + 右答案 ---------- */
.page-faq .faq-main {
  padding: clamp(34px, 4.6vw, 68px) 0 clamp(50px, 6vw, 92px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 3.6vw, 44px);
}

.page-faq .faq-toc {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.page-faq .faq-toc-title {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-toc-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .toc-link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.4;
  transition: color 0.18s ease, padding-left 0.18s ease, background-color 0.18s ease;
}

.page-faq .toc-link:hover {
  color: var(--white);
  background: var(--mist-soft);
}

.page-faq .toc-link.is-active,
.page-faq .toc-link[aria-current="true"] {
  padding-left: 12px;
  color: var(--cyan);
  box-shadow: inset 2px 0 0 var(--cyan);
}

.page-faq .toc-idx {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--line);
}

.page-faq .toc-link.is-active .toc-idx,
.page-faq .toc-link[aria-current="true"] .toc-idx {
  color: var(--lava);
}

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

.page-faq .faq-answers {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--bar) + 26px);
  padding-bottom: clamp(34px, 4vw, 56px);
}

.page-faq .faq-group + .faq-group {
  padding-top: clamp(30px, 3.6vw, 48px);
  border-top: 1px solid var(--line);
}

.page-faq .group-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px 14px;
  margin-bottom: clamp(16px, 2vw, 24px);
}

.page-faq .group-idx {
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .group-head .h2 {
  margin: 0;
}

.page-faq .group-tag {
  margin-left: auto;
}

/* ---------- 问答块 ---------- */
.page-faq .qa {
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.page-faq .qa:first-of-type {
  padding-top: 4px;
  border-top: 0;
}

.page-faq .qa-q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin: 0 0 12px;
  font-size: clamp(16.5px, 1.5vw, 19px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--white);
}

.page-faq .qa-mark {
  flex: 0 0 auto;
  margin-top: 3px;
  padding: 1px 6px 2px;
  border: 1px solid var(--mist);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.3;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .qa-a {
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .qa-a p {
  max-width: 68ch;
  margin: 0 0 12px;
}

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

/* ---------- 步骤列表 ---------- */
.page-faq .steps {
  counter-reset: faqstep;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 16px 0;
  padding: 0;
  list-style: none;
  max-width: 68ch;
}

.page-faq .steps li {
  position: relative;
  padding-left: 46px;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--white);
}

.page-faq .steps li::before {
  counter-increment: faqstep;
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  width: 34px;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--mist);
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .steps--compact {
  margin: 12px 0 18px;
  gap: 8px;
}

.page-faq .steps--compact li {
  font-size: 14.5px;
  color: var(--muted);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa-fold {
  margin-top: 18px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-faq .qa-fold > summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--white);
  transition: background-color 0.18s ease, color 0.18s ease;
}

.page-faq .qa-fold > summary::-webkit-details-marker {
  display: none;
}

.page-faq .qa-fold > summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--mono);
  font-size: 14px;
  color: var(--cyan);
}

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

.page-faq .qa-fold > summary:hover {
  background: var(--mist-soft);
  color: var(--cyan);
}

.page-faq .fold-body {
  padding: 0 16px 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .fold-body p {
  max-width: 66ch;
  margin: 0;
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  position: relative;
  margin: 20px 0 4px;
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
}

.page-faq .faq-figure figcaption {
  position: relative;
  z-index: 1;
  padding: 10px 16px;
  border-top: 1px solid var(--line);
  background: var(--panel);
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 会员档位 ---------- */
.page-faq .tier-list {
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
  max-width: 68ch;
}

.page-faq .tier-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .tier-name {
  flex: 0 0 62px;
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--neon);
}

.page-faq .tier-text {
  flex: 1 1 240px;
  min-width: 0;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--white);
}

/* ---------- 联系 ---------- */
.page-faq .faq-group--contact {
  padding-bottom: 0;
}

.page-faq .contact-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(18, 58, 60, 0.5), rgba(14, 20, 26, 0.9));
  padding: clamp(20px, 2.6vw, 32px);
}

.page-faq .contact-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .contact-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .contact-list li:first-child {
  padding-top: 0;
}

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

.page-faq .contact-label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .contact-value {
  display: block;
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.5;
  color: var(--white);
  word-break: break-word;
}

.page-faq .contact-value.mono {
  font-family: var(--mono);
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-faq .contact-hint {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.page-faq .contact-side {
  border-top: 1px solid var(--line);
  padding-top: 20px;
}

.page-faq .contact-side-title {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lava);
}

.page-faq .contact-side-text {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .contact-side .btn {
  margin-top: 4px;
}

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

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-stat + .faq-stat {
    padding-left: 20px;
    border-left: 1px solid var(--line);
  }

  .page-faq .contact-panel {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(24px, 3vw, 40px);
  }

  .page-faq .contact-side {
    border-top: 0;
    border-left: 1px solid var(--line);
    padding-top: 0;
    padding-left: clamp(20px, 2.4vw, 32px);
  }
}

/* ---------- 桌面：首屏分屏 + 粘性目录 ---------- */
@media (min-width: 960px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(34px, 4vw, 64px);
  }

  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--bar) + 22px);
    align-self: start;
    max-height: calc(100vh - var(--bar) - 44px);
    overflow-y: auto;
    padding-right: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .toc-link,
  .page-faq .qa-fold > summary {
    transition: none;
  }
}