.page-faq {
  --faq-col: 236px;
  --faq-rule: rgba(143, 166, 188, 0.18);
  --faq-hair: rgba(47, 243, 214, 0.28);
  padding-bottom: clamp(64px, 9vw, 120px);
}

@keyframes faqPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.55); opacity: 0.35; }
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 56px) 0 clamp(36px, 5vw, 72px);
  background:
    radial-gradient(120% 100% at 88% -12%, rgba(47, 243, 214, 0.15), transparent 60%),
    radial-gradient(90% 80% at -12% 112%, rgba(255, 122, 47, 0.13), transparent 62%);
}

.page-faq .breadcrumb {
  margin-bottom: clamp(22px, 3.4vw, 40px);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.05rem, 6.4vw, 4.3rem);
  line-height: 1.03;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 16px 0 0;
  max-width: 17ch;
}

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

.page-faq .faq-hero__text {
  margin: clamp(16px, 2.2vw, 24px) 0 0;
  max-width: 58ch;
  font-size: 1.0313rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-faq .faq-hero__card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--faq-hair);
}

.page-faq .faq-hero__card::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -90px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 243, 214, 0.16), transparent 70%);
  pointer-events: none;
}

.page-faq .faq-sync {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .faq-sync__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(47, 243, 214, 0.16);
  animation: faqPulse 2.4s var(--ease) infinite;
}

.page-faq .faq-facts {
  margin: 0;
  display: grid;
}

.page-faq .faq-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-facts__row:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-facts__key {
  margin: 0;
  font-size: 0.875rem;
  color: var(--muted);
}

.page-faq .faq-facts__val {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.9375rem;
  color: var(--ink);
  text-align: right;
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-faq .faq-nav,
.page-faq .faq-flow {
  min-width: 0;
}

.page-faq .faq-nav__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
  color: var(--muted);
}

.page-faq .faq-nav__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 10px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-nav__list li {
  flex: none;
}

.page-faq .faq-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  padding: 9px 14px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 2px solid transparent;
  color: var(--muted);
  font-size: 0.875rem;
  text-decoration: none;
  transition: color 0.24s var(--ease), background 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-faq .faq-nav__link:hover,
.page-faq .faq-nav__link:focus-visible {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.08);
  border-bottom-color: var(--cyan);
}

.page-faq .faq-nav__num {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

/* ---------- 章节 ---------- */
.page-faq .faq-chapter {
  padding-top: clamp(36px, 5vw, 64px);
  scroll-margin-top: 100px;
}

.page-faq .faq-flow > .faq-chapter:first-child {
  padding-top: 0;
}

.page-faq .faq-flow > .faq-chapter + .faq-chapter {
  border-top: 1px solid var(--faq-rule);
  margin-top: clamp(36px, 5vw, 64px);
}

.page-faq .faq-chapter__head {
  display: flex;
  gap: clamp(14px, 2.4vw, 26px);
  align-items: flex-start;
  margin-bottom: clamp(18px, 2.6vw, 30px);
}

.page-faq .faq-chapter__num {
  flex: none;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 0.92;
  color: rgba(47, 243, 214, 0.24);
}

.page-faq .faq-chapter__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.3rem, 3vw, 1.95rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-chapter__lead {
  margin: 0;
  max-width: 62ch;
  font-size: 0.9688rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-text {
  margin: 18px 0 0;
  max-width: 66ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ink);
}

.page-faq .faq-text--muted {
  font-size: 0.9375rem;
  color: var(--muted);
}

.page-faq .faq-step__text a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 三步 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 20px;
  border-radius: var(--radius);
  border: 1px solid var(--faq-rule);
  background: rgba(10, 42, 69, 0.48);
  transition: border-color 0.26s var(--ease), transform 0.26s var(--ease);
}

.page-faq .faq-step:hover {
  border-color: var(--faq-hair);
  transform: translateY(-2px);
}

.page-faq .faq-step__no {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-faq .faq-step__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--ink);
}

.page-faq .faq-step__text {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-mock {
  display: grid;
  gap: 6px;
  padding: 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--faq-rule);
  background: rgba(4, 18, 31, 0.62);
}

.page-faq .faq-mock__row {
  display: block;
  height: 8px;
  border-radius: 999px;
  background: rgba(143, 166, 188, 0.22);
}

.page-faq .faq-mock__row--cyan {
  background: linear-gradient(90deg, rgba(47, 243, 214, 0.9), rgba(47, 243, 214, 0.18));
}

.page-faq .faq-mock__row--orange {
  background: linear-gradient(90deg, rgba(255, 122, 47, 0.9), rgba(255, 122, 47, 0.18));
}

.page-faq .faq-mock__row--short {
  width: 62%;
}

/* ---------- 图示 ---------- */
.page-faq .faq-figure {
  margin: 22px 0 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--faq-hair);
  background: rgba(4, 18, 31, 0.6);
}

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

.page-faq .faq-figure figcaption {
  padding: 11px 16px;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--muted);
  border-top: 1px solid var(--faq-rule);
}

/* ---------- 双表读法 ---------- */
.page-faq .faq-dual {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.page-faq .faq-dual__side {
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--faq-rule);
  background: rgba(159, 246, 228, 0.06);
}

.page-faq .faq-dual__side--guest {
  background: rgba(255, 178, 122, 0.07);
}

.page-faq .faq-dual__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin: 0 0 8px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--faq-rule);
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  color: var(--cyan-soft);
}

.page-faq .faq-dual__side--guest .faq-dual__head {
  color: var(--amber);
}

.page-faq .faq-dual__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 9px 0;
  border-bottom: 1px solid var(--faq-rule);
  font-size: 0.9375rem;
}

.page-faq .faq-dual__row:last-child {
  border-bottom: 0;
  padding-bottom: 2px;
}

.page-faq .faq-dual__k {
  color: var(--muted);
}

.page-faq .faq-dual__v {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--ink);
}

/* ---------- 排序 ---------- */
.page-faq .faq-sorts {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-sort {
  padding: 18px;
  border-radius: var(--radius);
  border: 1px solid var(--faq-rule);
  background: rgba(255, 255, 255, 0.03);
}

.page-faq .faq-sort__key {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-faq .faq-sort__name {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--ink);
}

.page-faq .faq-sort__text {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-glass-card {
  border-radius: var(--radius);
  border: 1px solid var(--faq-hair);
  padding: clamp(18px, 2.6vw, 26px);
  margin-top: 16px;
}

.page-faq .faq-card__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--cyan);
}

.page-faq .faq-card__text {
  margin: 0;
  max-width: 62ch;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 步骤列表 ---------- */
.page-faq .faq-fix-steps {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-fix-step {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 15px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--faq-rule);
  background: rgba(10, 42, 69, 0.46);
}

.page-faq .faq-fix-step__num {
  flex: none;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--deep);
  background: var(--cyan);
}

.page-faq .faq-fix-step:nth-child(2) .faq-fix-step__num {
  background: var(--orange);
}

.page-faq .faq-fix-step .faq-step__text {
  font-size: 0.9375rem;
  color: var(--ink);
}

.page-faq .faq-fix-step .faq-step__text a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 设备 ---------- */
.page-faq .faq-device {
  display: grid;
  gap: 10px;
  margin: 0;
}

.page-faq .faq-device__item {
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--faq-rule);
  border-left: 2px solid var(--cyan);
  background: rgba(10, 42, 69, 0.42);
}

.page-faq .faq-device__k {
  margin: 0 0 6px;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-faq .faq-device__v {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.9375rem;
  color: var(--ink);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-accordion {
  display: grid;
  gap: 8px;
}

.page-faq .faq-q {
  border: 1px solid var(--faq-rule);
  border-radius: var(--radius-sm);
  background: rgba(10, 42, 69, 0.4);
  overflow: hidden;
  transition: border-color 0.24s var(--ease), background 0.24s var(--ease);
}

.page-faq .faq-q[open] {
  border-color: var(--faq-hair);
  background: rgba(10, 42, 69, 0.7);
}

.page-faq .faq-q__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  list-style: none;
  cursor: pointer;
  font-size: 0.9688rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
}

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

.page-faq .faq-q__index {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--cyan);
}

.page-faq .faq-q__mark {
  margin-left: auto;
  flex: none;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(45deg);
  transition: transform 0.26s var(--ease), border-color 0.26s var(--ease);
}

.page-faq .faq-q[open] .faq-q__mark {
  transform: rotate(-135deg);
  border-color: var(--cyan);
}

.page-faq .faq-q__body {
  padding: 0 16px 16px;
  max-width: 66ch;
  font-size: 0.9375rem;
  line-height: 1.82;
  color: var(--muted);
}

/* ---------- 索引入口 ---------- */
.page-faq .index-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .index-list__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  align-items: baseline;
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--faq-rule);
  background: rgba(255, 255, 255, 0.03);
  transition: border-color 0.24s var(--ease);
}

.page-faq .index-list__item:hover {
  border-color: var(--faq-hair);
}

.page-faq .index-list__num {
  grid-row: span 2;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.35rem;
  line-height: 1;
  color: var(--cyan-soft);
}

.page-faq .index-list__title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
}

.page-faq .index-list__title:hover,
.page-faq .index-list__title:focus-visible {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .index-list__desc {
  margin: 0;
  grid-column: 2;
  font-size: 0.875rem;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 中等屏 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-sorts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-dual {
    grid-template-columns: 1fr 1fr;
  }

  .page-faq .faq-device {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 桌面双栏 ---------- */
@media (min-width: 1040px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.16fr) minmax(0, 0.84fr);
    gap: clamp(40px, 5vw, 72px);
  }

  .page-faq .faq-body {
    grid-template-columns: var(--faq-col) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 72px);
  }

  .page-faq .faq-nav {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-faq .faq-nav__list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-nav__link {
    width: 100%;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    border-bottom: 0;
    border-left: 2px solid transparent;
    background: transparent;
  }

  .page-faq .faq-nav__link:hover,
  .page-faq .faq-nav__link:focus-visible {
    border-bottom-color: transparent;
    border-left-color: var(--cyan);
    background: rgba(255, 255, 255, 0.05);
  }

  .page-faq .faq-flow {
    position: relative;
    padding-left: 30px;
  }

  .page-faq .faq-flow::before {
    content: "";
    position: absolute;
    left: 0;
    top: 4px;
    bottom: 4px;
    width: 1px;
    background: linear-gradient(180deg, rgba(47, 243, 214, 0.55), rgba(255, 122, 47, 0.34) 62%, transparent);
  }

  .page-faq .faq-device {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1280px) {
  .page-faq {
    --faq-col: 252px;
  }
}

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

  .page-faq .faq-step:hover {
    transform: none;
  }

  .page-faq .faq-q,
  .page-faq .faq-q__mark,
  .page-faq .faq-nav__link,
  .page-faq .index-list__item {
    transition: none;
  }
}
</final_solution>