.page-faq {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-masthead {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 3.4vw, 40px) 0 clamp(32px, 5vw, 64px);
  background:
    radial-gradient(circle at 82% 12%, rgba(232, 106, 44, 0.16), transparent 58%),
    linear-gradient(180deg, rgba(6, 13, 22, 0.9), rgba(14, 26, 43, 0.4));
}

.page-faq .faq-masthead::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.13;
  pointer-events: none;
}

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

.page-faq .faq-masthead__grid {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  margin-top: clamp(20px, 3vw, 36px);
}

.page-faq .faq-masthead__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.4vw, 3.6rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 700;
  text-transform: none;
  max-width: 15em;
}

.page-faq .faq-masthead__intro {
  margin: clamp(14px, 2vw, 22px) 0 0;
  max-width: 58ch;
  font-size: clamp(0.94rem, 1.6vw, 1.02rem);
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-masthead__jumps {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-jump {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--orange);
  background: rgba(22, 39, 60, 0.55);
  color: var(--paper);
  text-decoration: none;
  transition: background 180ms var(--ease), border-color 180ms var(--ease), transform 180ms var(--ease);
}

.page-faq .faq-jump:hover,
.page-faq .faq-jump:focus-visible {
  background: var(--panel);
  border-color: var(--orange);
  transform: translateX(3px);
}

.page-faq .faq-jump__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--orange);
  flex: none;
}

.page-faq .faq-jump__label {
  font-size: 0.92rem;
  line-height: 1.5;
}

.page-faq .faq-masthead__media {
  margin: 0;
  position: relative;
  border: 1px solid var(--line);
}

.page-faq .faq-masthead__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
}

.page-faq .faq-masthead__cap {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  background: var(--ink-deep);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
  padding: clamp(28px, 4.5vw, 64px) 0 clamp(48px, 7vw, 96px);
}

/* 左栏索引 */
.page-faq .faq-index {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-faq .faq-index__title {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mist);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-index__nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px;
  border-left: 2px solid var(--line);
  background: rgba(22, 39, 60, 0.4);
  color: var(--mist);
  text-decoration: none;
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--paper);
  border-left-color: var(--orange);
  background: var(--panel);
}

.page-faq .faq-index__code {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--orange);
  flex: none;
}

.page-faq .faq-index__label {
  font-size: 0.88rem;
  line-height: 1.4;
}

.page-faq .faq-index__card {
  padding: 16px;
  border: 1px solid var(--line);
  background: rgba(22, 39, 60, 0.5);
  display: grid;
  gap: 8px;
  justify-items: start;
}

.page-faq .faq-index__card--dark {
  background: var(--ink-deep);
  border-left: 2px solid var(--orange);
}

.page-faq .faq-index__card-title {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-index__card-text {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--mist);
}

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

/* 右栏问答 */
.page-faq .faq-groups {
  display: grid;
  gap: clamp(32px, 5vw, 60px);
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 96px;
  display: grid;
  gap: clamp(14px, 2vw, 20px);
  min-width: 0;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__num {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  line-height: 1;
  color: var(--orange);
  letter-spacing: -0.02em;
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(1.06rem, 2.4vw, 1.34rem);
  line-height: 1.45;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-faq .faq-group__note {
  margin: 6px 0 0;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--mist);
}

/* 配图 */
.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--line);
  max-width: 520px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 7;
  object-fit: cover;
}

.page-faq .faq-figure__cap {
  padding: 9px 12px;
  border-top: 1px solid var(--line);
  background: rgba(6, 13, 22, 0.8);
  font-size: 0.76rem;
  color: var(--mist);
}

/* 手风琴 */
.page-faq .faq-list {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-left: 2px solid var(--line);
  background: rgba(22, 39, 60, 0.34);
  transition: border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-faq .faq-item:hover {
  border-color: var(--line);
  border-left-color: var(--orange-soft);
}

.page-faq .faq-item[open] {
  border-left-color: var(--orange);
  background: var(--panel);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  color: var(--paper);
}

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

.page-faq .faq-item summary::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--mist);
  transition: color 180ms var(--ease);
}

.page-faq .faq-item[open] summary::after {
  content: "−";
  color: var(--orange);
}

.page-faq .faq-item summary:focus-visible {
  outline: 1px solid var(--orange);
  outline-offset: -3px;
}

.page-faq .faq-item__code {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
  transition: color 180ms var(--ease);
}

.page-faq .faq-item[open] .faq-item__code {
  color: var(--orange);
}

.page-faq .faq-item__q {
  font-size: 0.95rem;
  line-height: 1.6;
  font-weight: 600;
}

.page-faq .faq-item__a {
  padding: 0 16px 16px 16px;
  margin-left: 0;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--mist);
  max-width: 62ch;
}

.page-faq .faq-item__a a {
  color: var(--orange-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--orange-soft);
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

/* 时序图 */
.page-faq .faq-timeline {
  margin: 0;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(6, 13, 22, 0.86), rgba(14, 26, 43, 0.5));
  padding: 14px 14px 6px;
}

.page-faq .faq-timeline__cap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--mist);
  margin-bottom: 6px;
}

.page-faq .faq-timeline__svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .tl-axis {
  stroke: var(--line);
  stroke-width: 1;
}

.page-faq .tl-node {
  fill: var(--ink-deep);
  stroke: var(--orange);
  stroke-width: 2;
}

.page-faq .tl-node--live {
  fill: var(--cyan);
  stroke: var(--cyan);
  stroke-width: 1.5;
}

.page-faq .tl-lane {
  fill: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.page-faq .tl-lab {
  fill: var(--mist);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
}

/* 材料清单 */
.page-faq .materials {
  border: 1px dashed var(--line);
  padding: clamp(14px, 2.4vw, 22px);
  display: grid;
  gap: 14px;
  background: rgba(6, 13, 22, 0.55);
}

.page-faq .materials__intro {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--mist);
  max-width: 56ch;
}

.page-faq .checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .checklist label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  background: rgba(22, 39, 60, 0.42);
  font-size: 0.87rem;
  line-height: 1.7;
  color: var(--mist);
  cursor: pointer;
  transition: border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-faq .checklist label:hover {
  border-color: var(--orange-soft);
}

.page-faq .checklist label strong {
  color: var(--paper);
  font-weight: 700;
}

.page-faq .checklist input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  flex: none;
  width: 15px;
  height: 15px;
  margin: 5px 0 0;
  border: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
  transition: background 180ms var(--ease), border-color 180ms var(--ease);
}

.page-faq .checklist input[type="checkbox"]:checked {
  background: var(--orange);
  border-color: var(--orange);
}

.page-faq .checklist input[type="checkbox"]:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .checklist__ready {
  margin: 0;
  padding: 12px 14px;
  border-left: 2px solid var(--line);
  background: rgba(22, 39, 60, 0.3);
  font-size: 0.85rem;
  line-height: 1.75;
  color: var(--mist);
  word-break: break-word;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-faq .checklist:not(:has(input[type="checkbox"]:not(:checked))) ~ .checklist__ready {
  border-left-color: var(--cyan);
  color: var(--paper);
}

/* 收尾 */
.page-faq .faq-tail {
  margin: 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--mist);
  max-width: 62ch;
}

.page-faq .faq-tail a {
  color: var(--orange-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--orange-soft);
}

.page-faq .faq-tail a:hover,
.page-faq .faq-tail a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-index__nav {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-faq .faq-masthead__media img {
    aspect-ratio: 16 / 6;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-masthead__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: end;
  }
  .page-faq .faq-masthead__jumps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-faq .faq-jump {
    flex-direction: column;
    gap: 6px;
  }
  .page-faq .faq-body {
    grid-template-columns: 248px minmax(0, 1fr);
    align-items: start;
  }
  .page-faq .faq-index {
    position: sticky;
    top: 88px;
  }
  .page-faq .faq-index__nav {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-masthead__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 48px;
  }
  .page-faq .faq-item__q {
    font-size: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump,
  .page-faq .faq-index__link,
  .page-faq .faq-item,
  .page-faq .faq-item__code,
  .page-faq .faq-item summary::after,
  .page-faq .checklist label,
  .page-faq .checklist input[type="checkbox"],
  .page-faq .checklist__ready {
    transition: none;
  }
  .page-faq .faq-jump:hover,
  .page-faq .faq-jump:focus-visible {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>