.page-faq {
  --faq-line: rgba(38, 69, 110, 0.45);
  --faq-soft: rgba(18, 41, 74, 0.55);
  --faq-step-gap: 1.1rem;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(1.6rem, 4vw, 3rem) 0 clamp(2rem, 4.5vw, 3.4rem);
  background:
    radial-gradient(110% 85% at 88% 0%, rgba(40, 224, 200, 0.13), transparent 58%),
    radial-gradient(90% 70% at 2% 100%, rgba(122, 233, 220, 0.07), transparent 62%);
  overflow: hidden;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 2rem;
  margin-top: 1.6rem;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 6vw, 4.2rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 0.55rem 0 0;
  max-width: 20ch;
}

.page-faq .faq-lede {
  margin: 1.1rem 0 0;
  max-width: 56ch;
  color: var(--silver);
  font-size: 1.0125rem;
  line-height: 1.85;
}

.page-faq .faq-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1.5rem;
}

.page-faq .faq-hero__media {
  margin: 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--steel-soft);
  background: var(--faq-soft);
  backdrop-filter: blur(14px);
  padding: 8px;
  box-shadow: 0 18px 40px -28px var(--shadow);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
  border-radius: calc(var(--radius-lg) - 6px);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: 2rem;
  padding-bottom: clamp(3rem, 6vw, 5.5rem);
}

/* ---------- 场景目录 ---------- */
.page-faq .faq-jump {
  border: 1px solid var(--steel-soft);
  border-radius: var(--radius-lg);
  background: var(--faq-soft);
  backdrop-filter: blur(16px);
  padding: 1.1rem 1rem 1.15rem;
  box-shadow: 0 16px 36px -30px var(--shadow);
}

.page-faq .faq-jump__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--silver);
}

.page-faq .faq-jump__list {
  list-style: none;
  margin: 0.7rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.1rem;
}

.page-faq .faq-jump__list a {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.5rem 0.6rem 0.5rem 0.7rem;
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--silver);
  text-decoration: none;
  font-size: 0.885rem;
  line-height: 1.5;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-faq .faq-jump__list a span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .faq-jump__list a:hover,
.page-faq .faq-jump__list a:focus-visible {
  border-left-color: var(--red);
  background-color: rgba(38, 69, 110, 0.38);
  color: var(--white);
  outline: none;
}

.page-faq .faq-jump__list a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-jump__foot {
  margin-top: 1rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--faq-line);
  display: flex;
}

.page-faq .faq-jump__foot .btn {
  width: 100%;
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  border-top: 1px solid var(--faq-line);
  padding-top: clamp(1.5rem, 3vw, 2.2rem);
  margin-top: clamp(1.9rem, 4vw, 3rem);
}

.page-faq .faq-panel > .faq-group:first-child {
  border-top: 0;
  padding-top: 0;
  margin-top: 0;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.25rem 0.85rem;
  align-items: baseline;
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.2vw, 2.4rem);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--cyan);
  opacity: 0.9;
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.25rem, 2.5vw, 1.85rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-group__sub {
  grid-column: 2;
  margin: 0.55rem 0 0;
  max-width: 62ch;
  color: var(--silver);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ---------- 路线图 ---------- */
.page-faq .faq-route {
  margin: 1.4rem 0 0;
  border: 1px solid var(--steel-soft);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(10, 26, 47, 0.6);
}

.page-faq .faq-route img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 6;
  object-fit: cover;
  opacity: 0.92;
}

/* ---------- 三步 ---------- */
.page-faq .faq-steps {
  list-style: none;
  counter-reset: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: var(--faq-step-gap);
}

.page-faq .faq-step {
  position: relative;
  z-index: 1;
  padding: 1.1rem 1rem 1.15rem;
  border: 1px solid var(--steel-soft);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(24, 52, 84, 0.78), rgba(18, 41, 74, 0.72));
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-faq .faq-step:hover {
  transform: translateY(-4px);
  border-color: var(--cyan);
  box-shadow: 0 16px 30px -24px var(--shadow);
}

.page-faq .faq-step__n {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
  border: 1px solid rgba(40, 224, 200, 0.35);
  border-radius: 999px;
  padding: 0.16rem 0.58rem;
}

.page-faq .faq-step h3 {
  margin: 0.8rem 0 0.4rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.08rem;
  line-height: 1.4;
  color: var(--white);
}

.page-faq .faq-step p {
  margin: 0;
  color: var(--silver);
  font-size: 0.9rem;
  line-height: 1.78;
}

.page-faq .faq-step .faq-step__coord {
  margin-top: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.05em;
  color: var(--mist);
  opacity: 0.5;
  transition: opacity 0.18s var(--ease), color 0.18s var(--ease);
}

.page-faq .faq-step:hover .faq-step__coord,
.page-faq .faq-step:focus-within .faq-step__coord {
  opacity: 1;
  color: var(--cyan);
}

/* ---------- 变更标记 ---------- */
.page-faq .faq-marks {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.35rem;
}

.page-faq .faq-mark {
  --dot: var(--steel);
  padding: 0.95rem 1rem 1.05rem;
  border: 1px solid var(--steel-soft);
  border-left: 3px solid var(--dot);
  border-radius: var(--radius);
  background: rgba(10, 26, 47, 0.55);
}

.page-faq .faq-mark--new { --dot: var(--cyan); }
.page-faq .faq-mark--rev { --dot: var(--silver); }
.page-faq .faq-mark--off { --dot: #55719a; }

.page-faq .faq-mark__key {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0 0 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--white);
}

.page-faq .faq-mark__key::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--dot);
}

.page-faq .faq-mark p {
  margin: 0;
  color: var(--silver);
  font-size: 0.9rem;
  line-height: 1.78;
}

.page-faq .faq-plain {
  margin: 1.4rem 0 0;
  max-width: 66ch;
  color: var(--silver);
  font-size: 0.95rem;
  line-height: 1.85;
}

.page-faq .note {
  margin-top: 1.25rem;
}

.page-faq .note p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--silver);
}

.page-faq .note strong {
  color: var(--white);
  font-weight: 600;
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-acc {
  margin-top: 1.3rem;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-item > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  padding: 1rem 0.2rem;
  color: var(--text);
  font-size: 0.985rem;
  line-height: 1.65;
  transition: color 0.18s var(--ease);
}

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

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

.page-faq .faq-item > summary:hover {
  color: var(--white);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

.page-faq .faq-item__sign {
  position: relative;
  flex: 0 0 auto;
  width: 1.05rem;
  height: 1.05rem;
  margin-top: 0.32rem;
  border: 1px solid var(--steel-soft);
  border-radius: 2px;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.page-faq .faq-item__sign::before {
  left: 50%;
  top: 20%;
  width: 1px;
  height: 60%;
  transform: translateX(-50%);
}

.page-faq .faq-item__sign::after {
  top: 50%;
  left: 20%;
  height: 1px;
  width: 60%;
  transform: translateY(-50%);
}

.page-faq .faq-item[open] .faq-item__sign::before {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-item[open] > summary {
  color: var(--white);
}

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

.page-faq .faq-item__a {
  padding: 0 0.2rem 1.1rem 1.9rem;
  color: var(--silver);
  font-size: 0.925rem;
  line-height: 1.85;
}

.page-faq .faq-item__a p {
  margin: 0 0 0.55rem;
  max-width: 64ch;
}

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

/* ---------- 内联指引 ---------- */
.page-faq .faq-inline-link {
  margin: 1.3rem 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--silver);
}

.page-faq .faq-inline-link a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(40, 224, 200, 0.35);
  padding-bottom: 1px;
}

.page-faq .faq-inline-link a:hover,
.page-faq .faq-inline-link a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--white);
}

/* ---------- 支持区 ---------- */
.page-faq .faq-support {
  display: grid;
  gap: 1.1rem;
  margin-top: 1.4rem;
}

.page-faq .faq-support__card {
  padding: 1.1rem 1.1rem 1.2rem;
  border: 1px solid var(--steel-soft);
  border-radius: var(--radius-lg);
  background: var(--faq-soft);
  backdrop-filter: blur(14px);
}

.page-faq .faq-support__hint {
  margin: 0.55rem 0 0.6rem;
  color: var(--silver);
  font-size: 0.875rem;
  line-height: 1.75;
}

.page-faq .faq-support__meta {
  margin: 0.85rem 0 0;
  padding-top: 0.8rem;
  border-top: 1px solid var(--faq-line);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  color: var(--silver);
  line-height: 1.7;
}

.page-faq .faq-copy {
  display: block;
  width: 100%;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  letter-spacing: 0.02em;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--steel-soft);
  border-radius: var(--radius);
  background: rgba(10, 26, 47, 0.6);
  color: var(--white);
  cursor: pointer;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-faq .faq-copy:hover,
.page-faq .faq-copy:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  outline: none;
}

.page-faq .faq-copy[data-copied] {
  border-color: var(--red);
  color: var(--white);
  background: rgba(227, 59, 69, 0.16);
}

.page-faq .faq-support__prep {
  padding: 1.1rem 1.1rem 1.2rem;
  border: 1px solid var(--steel-soft);
  border-radius: var(--radius-lg);
  background: rgba(10, 26, 47, 0.55);
}

.page-faq .faq-support__prep h3 {
  margin: 0 0 0.7rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--white);
}

.page-faq .faq-support__prep ul {
  list-style: none;
  margin: 0 0 1.1rem;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.page-faq .faq-support__prep li {
  position: relative;
  padding-left: 1.1rem;
  color: var(--silver);
  font-size: 0.885rem;
  line-height: 1.7;
}

.page-faq .faq-support__prep li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--cyan);
  opacity: 0.8;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-marks {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-support {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    gap: 1.3rem;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: end;
    gap: 3rem;
  }

  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.35rem;
    position: relative;
  }

  .page-faq .faq-steps::before {
    content: "";
    position: absolute;
    top: 2.1rem;
    left: 8%;
    right: 8%;
    border-top: 1px dashed var(--steel);
    z-index: 0;
    pointer-events: none;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-body {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 3.5rem;
    align-items: start;
  }

  .page-faq .faq-jump {
    position: sticky;
    top: calc(var(--bar-h) + 1.5rem);
  }

  .page-faq .faq-group__head {
    gap: 0.4rem 1.15rem;
  }

  .page-faq .faq-item__a {
    padding-left: 1.85rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step,
  .page-faq .faq-step__coord,
  .page-faq .faq-item__sign::before,
  .page-faq .faq-item__sign::after {
    transition: none;
  }

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