.page-faq {
  --faq-card: rgba(12, 38, 51, 0.92);
  --faq-tint: rgba(53, 240, 208, 0.12);
  padding: clamp(1.25rem, 3vw, 2.25rem) 0 clamp(3rem, 6vw, 4.5rem);
  background-image: radial-gradient(circle at 88% 4%, rgba(53, 240, 208, 0.07), transparent 42%);
}

.page-faq .breadcrumb { margin-bottom: clamp(1rem, 2.5vw, 1.5rem); }

/* ---------- 首屏 ---------- */
.page-faq .faq-lead {
  border-top: 2px solid var(--cyan);
  padding-top: clamp(1rem, 2.5vw, 1.5rem);
}
.page-faq .faq-lead__inner {
  display: grid;
  gap: 1.25rem;
}
.page-faq .faq-title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 6vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--text);
  margin: 0.5rem 0 0.85rem;
}
.page-faq .faq-lead__text {
  margin: 0;
  max-width: 62ch;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.75;
}
.page-faq .faq-stamp {
  display: grid;
  gap: 0.2rem;
  background: var(--paper);
  color: var(--ink);
  padding: 0.85rem 1rem;
  border: 2px solid var(--ink-deep);
  box-shadow: 7px 7px 0 rgba(53, 240, 208, 0.2);
  transform: rotate(-1.5deg);
  justify-self: start;
  font-family: var(--font-mono);
}
.page-faq .faq-stamp__k {
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #38505c;
}
.page-faq .faq-stamp__v {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1;
}
.page-faq .faq-stamp__n { font-size: 0.72rem; color: #38505c; }

.page-faq .faq-facts {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.page-faq .faq-facts li {
  background: var(--panel);
  padding: 0.9rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.page-faq .faq-facts b {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--cyan);
  line-height: 1;
}
.page-faq .faq-facts span { font-size: 0.8125rem; color: var(--muted); line-height: 1.5; }

/* ---------- 主体骨架 ---------- */
.page-faq .faq-shell {
  margin-top: clamp(2rem, 5vw, 3.25rem);
  display: grid;
  gap: 1.75rem;
}
.page-faq .faq-toc {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--faq-card), rgba(6, 24, 34, 0.94));
  padding: 1rem;
}
.page-faq .faq-toc__head {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--silver);
}
.page-faq .faq-toc__list {
  list-style: none;
  margin: 0.7rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.15rem;
}
.page-faq .faq-toc__link {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.5rem 0.4rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.875rem;
  border-left: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--text);
  background: var(--faq-tint);
  border-left-color: var(--cyan);
}
.page-faq .faq-toc__i {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--cyan);
}

/* ---------- 章节 ---------- */
.page-faq .faq-sec {
  padding-bottom: clamp(1.75rem, 4vw, 2.75rem);
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-sec:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}
.page-faq .faq-sec__head {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  flex-wrap: wrap;
  margin-bottom: 0.9rem;
}
.page-faq .faq-sec__num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--orange);
  border: 1px solid rgba(255, 122, 26, 0.45);
  padding: 0.1rem 0.45rem;
}
.page-faq h2 {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3.4vw, 2.05rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
  margin: 0;
}
.page-faq h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 0.35rem;
}
.page-faq .faq-sec > p {
  margin: 0;
  max-width: 68ch;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.78;
}

/* ---------- 三步 ---------- */
.page-faq .step-list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}
.page-faq .step {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 1.1rem 1.1rem 1.35rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  overflow: hidden;
}
.page-faq .step::before {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: var(--line);
}
.page-faq .step--key::before { background: var(--cyan); }
.page-faq .step--cta::before { background: var(--orange); }
.page-faq .step__num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--cyan);
}
.page-faq .step--cta .step__num { color: var(--orange); }
.page-faq .step__tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--silver);
}
.page-faq .step p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 图片框 ---------- */
.page-faq .media-frame { margin: 1.5rem 0 0; }
.page-faq .media-frame__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 路径图 ---------- */
.page-faq .route-list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}
.page-faq .route {
  border: 1px dashed var(--line);
  background: var(--faq-card);
  padding: 1rem;
}
.page-faq .route__label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--orange);
  border-bottom: 1px solid rgba(255, 122, 26, 0.5);
  padding-bottom: 0.2rem;
}
.page-faq .route__track {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin: 0.8rem 0 0.5rem;
}
.page-faq .route__node {
  display: inline-block;
  padding: 0.3rem 0.55rem;
  background: var(--ink-deep);
  border: 1px solid var(--line);
  color: var(--text);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  line-height: 1.4;
}
.page-faq a.route__node:hover,
.page-faq a.route__node:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
}
.page-faq .route__node--end {
  background: var(--faq-tint);
  border-color: var(--cyan);
  color: var(--cyan);
}
.page-faq .route__arrow { color: var(--silver); font-size: 0.8rem; }
.page-faq .route__note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
}

/* ---------- 面板信息 ---------- */
.page-faq .panel-grid {
  margin-top: 1.5rem;
  display: grid;
  gap: 1.5rem;
}
.page-faq .check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}
.page-faq .check {
  display: grid;
  gap: 0.3rem;
  padding: 0.85rem 1rem;
  background: var(--panel);
  border-left: 2px solid var(--cyan);
}
.page-faq .check__k {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
}
.page-faq .check p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- FAQ 手风琴 ---------- */
.page-faq .faq-group { margin-top: 1.5rem; }
.page-faq .faq-group__head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
}
.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
}
.page-faq .faq-group__title {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--silver);
  letter-spacing: 0.02em;
}
.page-faq .faq-item { border-top: 1px solid var(--line); }
.page-faq .faq-item:last-child { border-bottom: 1px solid var(--line); }
.page-faq summary::-webkit-details-marker { display: none; }
.page-faq .faq-q {
  list-style: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.8rem 0.25rem;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
  transition: color 0.2s var(--ease);
}
.page-faq .faq-q::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-weight: 400;
  color: var(--cyan);
}
.page-faq .faq-item[open] .faq-q::after { content: "−"; }
.page-faq .faq-q:hover,
.page-faq .faq-q:focus-visible { color: var(--cyan); }
.page-faq .faq-a {
  margin: 0;
  padding: 0 0.25rem 0.95rem;
  max-width: 66ch;
  font-size: 0.875rem;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 浏览器与文件 ---------- */
.page-faq .browser-grid {
  margin-top: 1.25rem;
  display: grid;
  gap: 0.75rem;
}
.page-faq .browser {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.page-faq .browser__dot {
  width: 14px;
  height: 14px;
  border: 2px solid var(--cyan);
  margin-bottom: 0.2rem;
}
.page-faq .browser:nth-child(2) .browser__dot { border-radius: 50%; }
.page-faq .browser:nth-child(3) .browser__dot { border-color: var(--silver); transform: rotate(45deg); }
.page-faq .browser:nth-child(4) .browser__dot { border-color: var(--orange); border-radius: 2px 50% 50% 2px; }
.page-faq .browser strong { font-size: 0.9375rem; color: var(--text); }
.page-faq .browser span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
}
.page-faq .file-list {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}
.page-faq .file-list li {
  display: grid;
  gap: 0.25rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  background: rgba(12, 38, 51, 0.6);
}
.page-faq .file-list__k {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--silver);
}
.page-faq .file-list p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 支持 ---------- */
.page-faq .support {
  margin-top: 1.5rem;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(255, 122, 26, 0.1), var(--faq-card) 46%);
  padding: clamp(1.1rem, 3vw, 1.75rem);
}
.page-faq .support__grid {
  display: grid;
  gap: 1.25rem;
}
.page-faq .support h3 { font-size: 1.05rem; }
.page-faq .support p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--muted);
  max-width: 60ch;
}
.page-faq .support__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1rem;
}
.page-faq .support__note {
  margin: 1.25rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--muted);
}
.page-faq .support__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 208, 0.4);
}
.page-faq .support__note a:hover,
.page-faq .support__note a:focus-visible { border-bottom-color: var(--cyan); }

/* ---------- 断点 ---------- */
@media (min-width: 600px) {
  .page-faq .faq-facts { grid-template-columns: repeat(3, 1fr); }
  .page-faq .faq-lead__inner { grid-template-columns: minmax(0, 1fr) auto; align-items: end; }
  .page-faq .browser-grid { grid-template-columns: repeat(2, 1fr); }
  .page-faq .route__track { gap: 0.5rem; }
}

@media (min-width: 760px) {
  .page-faq .step-list { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 860px) {
  .page-faq .panel-grid { grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); align-items: start; }
  .page-faq .support__grid { grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); }
  .page-faq .browser-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 960px) {
  .page-faq .faq-shell {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 2.5rem;
    align-items: start;
  }
  .page-faq .faq-toc { position: sticky; top: 1.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-toc__link,
  .page-faq .faq-q { transition: none; }
  .page-faq .faq-stamp { transform: none; }
}