.page-faq {
  --faq-panel: rgba(14, 42, 35, .58);
  --faq-panel-2: rgba(18, 51, 41, .82);
  --faq-gap: clamp(1.25rem, 3vw, 2.5rem);
  --faq-aside-w: 258px;
  background: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

.page-faq .mono {
  font-family: var(--font-mono);
  letter-spacing: .04em;
}

/* ---------- 首屏 ---------- */
.page-faq .tut-hero {
  position: relative;
  padding: clamp(2rem, 5vw, 3.4rem) 0 clamp(1.6rem, 4vw, 2.8rem);
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(120% 140% at 92% -10%, rgba(89, 224, 200, .13) 0%, transparent 58%),
    linear-gradient(118deg, rgba(184, 255, 61, .10) 0%, rgba(184, 255, 61, 0) 42%),
    var(--ink);
}

.page-faq .tut-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 -1px 0;
  height: 3px;
  background: linear-gradient(90deg, var(--lime) 0%, var(--lime) 22%, var(--ice) 48%, transparent 78%);
  opacity: .8;
}

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

.page-faq .eyebrow {
  margin: 0 0 .9rem;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--ice);
}

.page-faq .tut-hero__title {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 6.2vw, 4.4rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: .02em;
  color: var(--paper);
}

.page-faq .tut-hero__lead {
  max-width: 60ch;
  margin: 0 0 1.6rem;
  font-size: var(--fs-body);
  line-height: 1.8;
  color: var(--paper-70);
}

.page-faq .tut-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem .9rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: .08em;
  color: var(--steel);
}

.page-faq .tut-hero__meta li {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .35rem .7rem;
  border: 1px solid var(--line);
  background: rgba(7, 27, 22, .55);
}

.page-faq .tut-hero__meta .mono {
  color: var(--lime);
  font-size: .8125rem;
}

/* ---------- 双栏骨架 ---------- */
.page-faq .tut-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  padding-top: clamp(1.5rem, 4vw, 2.8rem);
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
}

.page-faq .tut-aside {
  display: grid;
  gap: 1.1rem;
  align-content: start;
  padding: 1.1rem;
  border: 1px solid var(--line-soft);
  background: var(--faq-panel);
}

.page-faq .tut-aside__label {
  margin: 0 0 .6rem;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-faq .tut-filters {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}

.page-faq .tut-filters .filter-btn {
  padding: .34rem .62rem;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--paper-70);
  font-family: var(--font-display);
  font-size: var(--fs-micro);
  letter-spacing: .04em;
  cursor: pointer;
  transition: color .18s linear, border-color .18s linear, background .18s linear;
}

.page-faq .tut-filters .filter-btn:hover {
  color: var(--lime);
  border-color: var(--lime-dark);
}

.page-faq .tut-filters .filter-btn[aria-pressed="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
  font-weight: 700;
}

.page-faq .tut-toc {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .1rem;
}

.page-faq .tut-toc a {
  display: flex;
  align-items: baseline;
  gap: .55rem;
  padding: .42rem .3rem;
  color: var(--paper-70);
  text-decoration: none;
  font-size: .875rem;
  line-height: 1.5;
  border-left: 2px solid transparent;
  transition: color .18s linear, border-color .18s linear, background .18s linear;
}

.page-faq .tut-toc a:hover,
.page-faq .tut-toc a:focus-visible {
  color: var(--lime);
  border-left-color: var(--lime);
  background: var(--lime-ghost);
}

.page-faq .tut-toc .mono {
  color: var(--ice);
  font-size: .6875rem;
}

.page-faq .tut-aside__hint p {
  margin: 0;
  font-size: .8125rem;
  line-height: 1.72;
  color: var(--paper-70);
}

.page-faq .tut-aside__hint {
  border-top: 1px solid var(--line-soft);
  padding-top: 1rem;
}

/* ---------- 问答章节 ---------- */
.page-faq .tut-content {
  min-width: 0;
}

.page-faq .faq-section {
  padding: 0 0 clamp(1.4rem, 3vw, 2.2rem);
  margin-bottom: clamp(1.4rem, 3vw, 2.2rem);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-section:last-of-type {
  border-bottom: 0;
}

.page-faq .faq-section:not(:has(.faq-item:not([hidden]))) {
  display: none;
}

.page-faq .faq-section__head {
  display: flex;
  gap: .9rem;
  align-items: flex-start;
  margin-bottom: 1.1rem;
}

.page-faq .section-no {
  flex: none;
  padding-top: .35rem;
  font-size: 1.05rem;
  color: var(--lime);
}

.page-faq .section-title {
  margin: 0 0 .3rem;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 3vw, 1.7rem);
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--paper);
}

.page-faq .section-note {
  margin: 0;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-item {
  margin-bottom: .5rem;
  border: 1px solid var(--line-soft);
  background: var(--faq-panel);
  transition: border-color .18s linear, background .18s linear;
}

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

.page-faq .faq-item[open] {
  border-color: rgba(184, 255, 61, .34);
  background: var(--faq-panel-2);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: baseline;
  gap: .7rem;
  padding: .85rem 1rem;
  cursor: pointer;
  list-style: none;
  font-size: .9375rem;
  line-height: 1.6;
  color: var(--paper);
}

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

.page-faq .faq-item summary::marker {
  content: "";
}

.page-faq .faq-num {
  flex: none;
  font-size: .6875rem;
  color: var(--ice);
}

.page-faq .faq-qtext {
  flex: 1 1 auto;
}

.page-faq .faq-item summary::after {
  content: "+";
  flex: none;
  align-self: center;
  width: 1.1rem;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--lime-dark);
  transition: color .18s linear;
}

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

.page-faq .faq-item[open] summary {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-a {
  padding: .9rem 1rem 1.1rem 2.4rem;
  font-size: .875rem;
  line-height: 1.82;
  color: var(--paper-70);
}

.page-faq .faq-a p {
  margin: 0 0 .7rem;
}

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

.page-faq .faq-a a {
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid rgba(89, 224, 200, .38);
}

.page-faq .faq-a a:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-faq .steps {
  margin: .2rem 0 .8rem;
  padding: 0;
  list-style: none;
  counter-reset: step;
  display: grid;
  gap: .45rem;
}

.page-faq .steps li {
  counter-increment: step;
  position: relative;
  padding-left: 2.1rem;
  font-size: .875rem;
  line-height: 1.75;
}

.page-faq .steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: .1rem;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .04em;
  color: var(--ink);
  background: var(--lime);
  padding: .12rem .3rem;
}

/* ---------- 操作示意 ---------- */
.page-faq .tut-figure {
  margin: 1.3rem 0 0;
  padding: .55rem;
  border: 1px solid var(--line);
  background: rgba(7, 27, 22, .6);
}

.page-faq .tut-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.72) contrast(1.04);
  border-bottom: 2px solid var(--lime-dark);
}

.page-faq .tut-figure figcaption {
  padding: .6rem .35rem .2rem;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .04em;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 兜底联系 ---------- */
.page-faq .faq-fallback {
  margin-top: .5rem;
  padding: clamp(1.2rem, 3vw, 1.9rem);
  border: 1px solid rgba(255, 155, 74, .38);
  border-left: 3px solid var(--orange);
  background:
    linear-gradient(140deg, rgba(255, 155, 74, .10) 0%, rgba(255, 155, 74, 0) 62%),
    var(--ink-2);
}

.page-faq .faq-fallback__title {
  margin: 0 0 .6rem;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.6vw, 1.4rem);
  font-weight: 700;
  letter-spacing: .05em;
  color: var(--paper);
}

.page-faq .faq-fallback__text {
  margin: 0 0 1rem;
  max-width: 62ch;
  font-size: .875rem;
  line-height: 1.8;
  color: var(--paper-70);
}

.page-faq .faq-fallback__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .6rem;
  padding: .7rem .8rem;
  border: 1px solid var(--line-soft);
  background: rgba(7, 27, 22, .55);
}

.page-faq .faq-mail {
  flex: 1 1 auto;
  min-width: 0;
  font-size: .8125rem;
  word-break: break-all;
  color: var(--ice);
}

.page-faq .faq-fallback .copy-btn {
  flex: none;
  padding: .34rem .72rem;
  border: 1px solid var(--lime-dark);
  background: transparent;
  color: var(--lime);
  font-family: var(--font-display);
  font-size: var(--fs-micro);
  letter-spacing: .06em;
  cursor: pointer;
  transition: background .18s linear, color .18s linear;
}

.page-faq .faq-fallback .copy-btn:hover,
.page-faq .faq-fallback .copy-btn.is-done {
  background: var(--lime);
  color: var(--ink);
}

.page-faq .faq-fallback__links {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1.2rem;
  margin: 1rem 0 0;
  font-size: .8125rem;
}

.page-faq .faq-fallback__links a {
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid var(--lime-dark);
  padding-bottom: 1px;
}

.page-faq .faq-fallback__links a:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

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

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-faq .tut-filters .filter-btn {
    font-size: .75rem;
    padding: .38rem .7rem;
  }

  .page-faq .faq-item summary {
    padding: 1rem 1.15rem;
    font-size: 1rem;
  }

  .page-faq .faq-a {
    padding: 1rem 1.4rem 1.25rem 2.9rem;
    font-size: .9375rem;
  }
}

/* ---------- 桌面：粘性侧栏 ---------- */
@media (min-width: 960px) {
  .page-faq .tut-layout {
    grid-template-columns: var(--faq-aside-w) minmax(0, 1fr);
    align-items: start;
    gap: clamp(1.8rem, 3.5vw, 3.2rem);
  }

  .page-faq .tut-aside {
    position: sticky;
    top: 92px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
  }

  .page-faq .tut-filters {
    flex-direction: column;
    align-items: stretch;
  }

  .page-faq .tut-filters .filter-btn {
    text-align: left;
  }

  .page-faq .faq-section__head {
    gap: 1.2rem;
  }

  .page-faq .faq-a {
    max-width: 68ch;
  }
}

/* ---------- 宽屏节奏 ---------- */
@media (min-width: 1200px) {
  .page-faq .tut-layout {
    grid-template-columns: 280px minmax(0, 1fr);
  }

  .page-faq .faq-item summary {
    padding: 1.1rem 1.3rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .filter-btn,
  .page-faq .tut-toc a,
  .page-faq .faq-item,
  .page-faq .copy-btn,
  .page-faq .faq-item summary::after {
    transition: none;
  }
}
<<<END>>>