.page-faq {
  --faq-index-w: 246px;
  --faq-line: rgba(244, 247, 245, 0.10);
  --faq-line-strong: rgba(244, 247, 245, 0.24);
  --faq-text-soft: rgba(244, 247, 245, 0.80);
  --faq-text-dim: rgba(244, 247, 245, 0.62);
  --faq-neon-a12: rgba(198, 255, 61, 0.12);
  --faq-neon-a32: rgba(198, 255, 61, 0.32);
  padding: 0 var(--pad-x) 88px;
  color: var(--jersey);
  font-family: var(--font-body);
}

.page-faq a {
  color: var(--neon-soft);
}

/* ---------------- 首屏 ---------------- */

.page-faq .tut-hero {
  padding-top: 28px;
  padding-bottom: 34px;
  position: relative;
}

.page-faq .tut-hero::before {
  content: "";
  position: absolute;
  inset: -40px -6% auto -6%;
  height: 320px;
  background:
    radial-gradient(560px 220px at 12% 0%, rgba(23, 85, 63, 0.45), transparent 70%),
    radial-gradient(420px 180px at 88% 12%, rgba(198, 255, 61, 0.10), transparent 72%);
  pointer-events: none;
  z-index: -1;
}

.page-faq .tut-hero__grid {
  display: grid;
  gap: 26px;
  margin-top: 22px;
}

.page-faq .tut-hero .mono-label {
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid var(--faq-neon-a32);
  border-radius: 2px;
  color: var(--neon);
  background: var(--faq-neon-a12);
  margin: 0 0 16px;
}

.page-faq .tut-hero h1 {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-size: 30px;
  line-height: 1.22;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--jersey);
}

.page-faq .tut-hero .lede {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--faq-text-soft);
}

.page-faq .tut-hero__stats {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .tut-hero__stat {
  background: var(--panel);
  padding: 14px 12px 16px;
}

.page-faq .tut-hero__stat dt {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--stand);
}

.page-faq .tut-hero__stat dd {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.4;
  color: var(--jersey);
}

.page-faq .tut-hero__stat .stat-num {
  font-family: var(--font-mono);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  font-size: 34px;
  line-height: 1;
  color: var(--neon);
}

/* ---------------- 双栏骨架 ---------------- */

.page-faq .tut-layout {
  display: grid;
  gap: 26px;
  padding-top: 30px;
}

/* ---------------- 左侧索引轨道 ---------------- */

.page-faq .tut-index {
  padding: 16px 14px 14px;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.page-faq .tut-index__label {
  margin: 0;
  color: var(--neon);
}

.page-faq .tut-index__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: thin;
  padding-bottom: 4px;
}

.page-faq .tut-index__list li {
  flex: 0 0 auto;
}

.page-faq .tut-index__list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 10px;
  border-radius: 3px;
  border-bottom: 2px solid transparent;
  color: var(--stand);
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.4;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .tut-index__list a:hover,
.page-faq .tut-index__list a:focus-visible {
  color: var(--neon-soft);
  background: rgba(198, 255, 61, 0.07);
}

.page-faq .tut-index__list a:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-faq .tut-index__list a.is-active {
  color: var(--neon);
  background: var(--faq-neon-a12);
  border-bottom-color: var(--neon);
}

.page-faq .tut-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--neon);
  opacity: 0.72;
}

.page-faq .tut-index__list a.is-active .tut-index__num {
  opacity: 1;
}

/* ---------------- 手风琴条目 ---------------- */

.page-faq .tut-body {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.page-faq .tut-item {
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .tut-item:hover {
  border-color: var(--faq-line-strong);
}

.page-faq .tut-item.is-open {
  border-color: var(--faq-neon-a32);
  box-shadow: inset 3px 0 0 0 var(--neon);
}

.page-faq .tut-item__head {
  margin: 0;
  font-size: inherit;
}

.page-faq .expand__btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 17px 16px;
  background: transparent;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background var(--dur) var(--ease);
}

.page-faq .expand__btn:hover {
  background: rgba(244, 247, 245, 0.03);
}

.page-faq .expand__btn:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: -2px;
}

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

.page-faq .expand__title {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.3;
  color: var(--jersey);
}

.page-faq .tut-item.is-open .expand__title {
  color: var(--neon-soft);
}

.page-faq .expand__icon {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
}

.page-faq .expand__icon::before,
.page-faq .expand__icon::after {
  content: "";
  position: absolute;
  background: var(--neon);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .expand__icon::before {
  left: 0;
  top: 8px;
  width: 18px;
  height: 2px;
}

.page-faq .expand__icon::after {
  left: 8px;
  top: 0;
  width: 2px;
  height: 18px;
}

.page-faq .tut-item.is-open .expand__icon::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .expand__panel {
  display: none;
  border-top: 1px solid var(--faq-line);
}

.page-faq .tut-item.is-open .expand__panel {
  display: block;
}

.page-faq .expand__inner {
  padding: 20px 16px 22px;
}

/* ---------------- 步骤卡 ---------------- */

.page-faq .tut-p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--faq-text-soft);
}

.page-faq .tut-step {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 12px;
  padding: 15px 16px;
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  background: rgba(10, 15, 13, 0.55);
  margin-bottom: 12px;
}

.page-faq .tut-step__idx {
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1.2;
  color: var(--neon);
}

.page-faq .tut-step__body {
  min-width: 0;
}

.page-faq .tut-step__title {
  margin: 0 0 7px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.35;
  color: var(--jersey);
}

.page-faq .tut-step__body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--faq-text-soft);
}

.page-faq .tut-step__body a {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------------- 图片 ---------------- */

.page-faq .tut-figure {
  margin: 14px 0 16px;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-black);
}

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

.page-faq .tut-figure figcaption {
  padding: 9px 13px 11px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--stand);
  background: var(--panel);
}

/* ---------------- 步骤导航 ---------------- */

.page-faq .tut-stepnav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.page-faq .tut-stepnav .btn {
  font-size: 13.5px;
  padding: 9px 15px;
}

/* ---------------- 问答 ---------------- */

.page-faq .qa-list {
  display: grid;
  gap: 16px;
}

.page-faq .qa {
  padding-left: 13px;
  border-left: 2px solid var(--pitch-line);
  transition: border-color var(--dur) var(--ease);
}

.page-faq .qa:hover {
  border-left-color: var(--neon-soft);
}

.page-faq .qa__q {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 16.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.4;
  color: var(--neon-soft);
}

.page-faq .qa__a {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--faq-text-soft);
}

/* ---------------- 页尾提示 ---------------- */

.page-faq .tut-foot {
  margin-top: 40px;
  padding: 22px 18px;
  display: grid;
  gap: 18px;
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--amber);
  border-radius: var(--radius);
  background:
    linear-gradient(120deg, rgba(18, 53, 42, 0.62), rgba(20, 27, 24, 0.85) 62%);
}

.page-faq .tut-foot .mono-label {
  display: block;
  margin: 0 0 10px;
  color: var(--amber);
}

.page-faq .tut-foot__text {
  margin: 0;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--faq-text-soft);
}

.page-faq .tut-foot__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .tut-foot__links .btn {
  font-size: 13.5px;
  padding: 9px 15px;
}

/* ---------------- 中等屏幕 ---------------- */

@media (min-width: 720px) {
  .page-faq .tut-hero h1 {
    font-size: 38px;
  }

  .page-faq .expand__title {
    font-size: 22px;
  }

  .page-faq .expand__inner {
    padding: 24px 22px 26px;
  }

  .page-faq .expand__btn {
    padding: 20px 22px;
  }

  .page-faq .tut-figure--side {
    max-width: 460px;
  }

  .page-faq .tut-foot {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 26px 24px;
  }
}

/* ---------------- 桌面端双栏 ---------------- */

@media (min-width: 1000px) {
  .page-faq .tut-hero {
    padding-top: 42px;
    padding-bottom: 46px;
  }

  .page-faq .tut-hero__grid {
    grid-template-columns: minmax(0, 1fr) 340px;
    align-items: end;
    gap: 52px;
  }

  .page-faq .tut-hero h1 {
    font-size: 44px;
    max-width: 18ch;
  }

  .page-faq .tut-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 48px;
    padding-top: 44px;
  }

  .page-faq .tut-index {
    position: sticky;
    top: 24px;
    padding: 20px 16px 18px;
  }

  .page-faq .tut-index__list {
    display: grid;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .tut-index__list a {
    white-space: normal;
    border-bottom: 0;
    border-left: 2px solid transparent;
    border-radius: 0 3px 3px 0;
    padding: 10px 11px;
    font-size: 14px;
    align-items: flex-start;
  }

  .page-faq .tut-index__list a.is-active {
    border-left-color: var(--neon);
    border-bottom-color: transparent;
  }

  .page-faq .tut-index__num {
    padding-top: 2px;
  }

  .page-faq .tut-figure {
    margin-top: 18px;
  }
}

/* ---------------- 降级与动效 ---------------- */

.page-faq .tut-body:not(:has(.tut-item.is-open)) .expand__panel {
  display: block;
}

.page-faq [data-reveal] {
  opacity: 1;
}

.page-faq .tut-item.is-open .expand__panel {
  animation: faq-panel-in 220ms var(--ease) both;
}

@keyframes faq-panel-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .expand__panel,
  .page-faq .expand__icon::before,
  .page-faq .expand__icon::after,
  .page-faq .tut-index__list a,
  .page-faq .tut-item {
    transition: none;
    animation: none;
  }
}
<<<END>>>