.page-faq {
  --faq-gap: clamp(2.25rem, 5vw, 3.5rem);
  --faq-soft-line: rgba(30, 58, 51, .7);
}

.page-faq .breadcrumb {
  margin: 1rem 0 0;
  font-size: var(--fs-note);
}

.page-faq .breadcrumb [aria-current="page"] {
  color: var(--white);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  margin-top: 1rem;
  padding-block: clamp(2rem, 5.5vw, 3.5rem);
  background: linear-gradient(158deg, var(--ink-2) 0%, var(--ink) 64%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -25%;
  background-image:
    linear-gradient(to right, rgba(30, 58, 51, .5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 58, 51, .5) 1px, transparent 1px);
  background-size: 46px 46px;
  opacity: .55;
  -webkit-mask-image: radial-gradient(circle at 82% 18%, #000 0%, transparent 72%);
  mask-image: radial-gradient(circle at 82% 18%, #000 0%, transparent 72%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(1.75rem, 4vw, 2.75rem);
}

.page-faq .faq-hero h1 {
  margin: .7rem 0 0;
  font-size: clamp(1.85rem, 4.6vw, 3rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--white);
  max-width: 20em;
}

.page-faq .faq-hero__text {
  margin: 1rem 0 0;
  max-width: 34em;
  font-size: .98rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55rem;
  margin: 1.35rem 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-note);
  color: var(--mist-dim);
}

.page-faq .faq-hero__dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--cyan);
  flex: none;
}

/* ---------- 场景索引 ---------- */
.page-faq .faq-jump {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(18, 38, 31, .74);
  padding: 1.1rem 1rem;
  box-shadow: var(--shadow-card);
}

.page-faq .faq-jump__title {
  margin: 0 0 .7rem;
  padding-left: .1rem;
  font-family: var(--font-mono);
  font-size: var(--fs-note);
  letter-spacing: .1em;
  color: var(--mist-dim);
}

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

.page-faq .faq-jump__link {
  display: grid;
  grid-template-columns: 2.1rem minmax(0, 1fr);
  align-items: center;
  gap: .55rem;
  padding: .55rem .55rem .55rem .6rem;
  border-left: 2px solid transparent;
  border-radius: var(--r-sm);
  color: var(--white);
  font-size: .95rem;
  text-decoration: none;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-jump__link:hover {
  background: var(--cyan-soft);
  border-left-color: var(--cyan);
}

.page-faq .faq-jump__link:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.page-faq .faq-jump__num {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--gold);
  letter-spacing: .06em;
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-groups {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  padding-block: var(--faq-gap);
}

.page-faq .faq-group {
  display: grid;
  gap: 1rem;
}

.page-faq .faq-group__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .06em;
  color: var(--gold);
}

.page-faq .faq-group__num::after {
  content: "";
  display: block;
  width: 26px;
  height: 3px;
  margin-top: .55rem;
  border-radius: 2px;
  background: var(--cyan);
}

.page-faq .faq-group__head {
  margin-bottom: 1rem;
}

.page-faq .faq-group__desc {
  margin: .65rem 0 0;
  max-width: 40em;
  font-size: .93rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-list {
  display: grid;
  gap: .6rem;
}

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

.page-faq .faq-item:hover {
  transform: translateY(-2px);
  border-color: rgba(34, 224, 200, .35);
}

.page-faq .faq-item[open] {
  border-color: rgba(34, 224, 200, .5);
  box-shadow: var(--shadow-card);
}

.page-faq .faq-item__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: .7rem;
  padding: .9rem .95rem;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__summary:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.page-faq .faq-item__idx {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--mist-dim);
  letter-spacing: .05em;
}

.page-faq .faq-item__q {
  font-size: .96rem;
  font-weight: 500;
  line-height: 1.6;
  color: var(--white);
}

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

.page-faq .faq-item__tag {
  display: none;
}

.page-faq .faq-item__mark {
  position: relative;
  width: 1.15rem;
  height: 1.15rem;
  border: 1px solid var(--line);
  border-radius: 2px;
  justify-self: end;
  flex: none;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--cyan);
  transform: translate(-50%, -50%);
}

.page-faq .faq-item__mark::before {
  width: .6rem;
  height: 1px;
}

.page-faq .faq-item__mark::after {
  width: 1px;
  height: .6rem;
  transition: transform var(--dur) var(--ease);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .faq-item__answer {
  padding: .95rem 1rem 1.15rem;
  border-top: 1px dashed var(--faq-soft-line);
  font-size: .94rem;
  line-height: 1.8;
  color: var(--white);
}

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

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

.page-faq .faq-item__answer a,
.page-faq .faq-deep__text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 224, 200, .4);
}

.page-faq .faq-item__answer a:hover,
.page-faq .faq-deep__text a:hover {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-item__answer a:focus-visible,
.page-faq .faq-deep__text a:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: 2px;
}

/* ---------- 分步勾选 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 1.1rem 0 0;
  padding: 0;
  display: grid;
  gap: .65rem;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: .65rem;
}

.page-faq .faq-steps input[type="checkbox"] {
  position: relative;
  width: 1.05rem;
  height: 1.05rem;
  margin: .3rem 0 0;
  appearance: none;
  -webkit-appearance: none;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--ink);
  cursor: pointer;
  flex: none;
}

.page-faq .faq-steps input[type="checkbox"]:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

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

.page-faq .faq-steps input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 46%;
  width: .42rem;
  height: .22rem;
  border-left: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  transform: translate(-50%, -50%) rotate(-45deg);
}

.page-faq .faq-steps label {
  font-size: .93rem;
  line-height: 1.75;
  color: var(--white);
  cursor: pointer;
}

.page-faq .faq-steps input[type="checkbox"]:checked + label {
  color: var(--mist-dim);
}

/* ---------- 深入解法 ---------- */
.page-faq .faq-deep {
  margin-top: var(--faq-gap);
  padding: clamp(1.35rem, 3.4vw, 2.35rem);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(18, 38, 31, .92), rgba(12, 26, 23, .92));
}

.page-faq .faq-deep--export {
  border-left: 3px solid var(--orange);
  background: linear-gradient(180deg, rgba(18, 38, 31, .95), rgba(6, 17, 15, .95));
}

.page-faq .faq-deep__inner {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
}

.page-faq .faq-deep__head {
  margin-bottom: clamp(1.1rem, 2.6vw, 1.6rem);
}

.page-faq .faq-deep__lead {
  margin: .8rem 0 0;
  max-width: 42em;
  font-size: .95rem;
  line-height: 1.82;
  color: var(--mist);
}

.page-faq .faq-deep .section-title {
  font-size: clamp(1.3rem, 2.4vw, 1.65rem);
}

.page-faq .faq-deep__note {
  margin: 1.05rem 0 0;
  padding-left: .85rem;
  border-left: 2px solid var(--line);
  font-size: var(--fs-note);
  line-height: 1.7;
  color: var(--mist-dim);
}

.page-faq .faq-deep__text p {
  margin: 0 0 .8rem;
  font-size: .94rem;
  line-height: 1.82;
  color: var(--white);
}

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

/* ---------- 图形 ---------- */
.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--ink-2);
}

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

.page-faq .faq-figure__caption {
  padding: .65rem .9rem;
  border-top: 1px solid var(--line);
  font-size: var(--fs-note);
  line-height: 1.65;
  color: var(--mist-dim);
}

/* ---------- 导出对照表 ---------- */
.page-faq .faq-table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--ink-2);
}

.page-faq .faq-table-wrap .data-table {
  width: 100%;
  min-width: 30rem;
}

.page-faq .faq-table-wrap .data-table caption {
  padding: .8rem .9rem .2rem;
  text-align: left;
  font-family: var(--font-mono);
  font-size: var(--fs-note);
  color: var(--mist-dim);
}

/* ---------- 兜底求助 ---------- */
.page-faq .faq-help {
  margin-top: var(--faq-gap);
  padding-block: clamp(1.75rem, 4vw, 2.75rem);
  border-top: 1px solid var(--line);
}

.page-faq .faq-help__lead {
  margin: .8rem 0 1.4rem;
  max-width: 40em;
  font-size: .94rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-help__grid {
  display: grid;
  gap: .9rem;
}

.page-faq .faq-help__card {
  padding: 1.1rem 1.05rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--card);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-help__card:hover {
  transform: translateY(-2px);
  border-color: rgba(34, 224, 200, .4);
}

.page-faq .faq-help__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-faq .faq-help__title {
  margin: .5rem 0 .5rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--white);
}

.page-faq .faq-help__text {
  margin: 0 0 1rem;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-help__link {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-family: var(--font-mono);
  font-size: var(--fs-note);
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 224, 200, .35);
  padding-bottom: 2px;
}

.page-faq .faq-help__link::after {
  content: "→";
}

.page-faq .faq-help__link:hover {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-help__link:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: 2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 680px) {
  .page-faq .faq-item__summary {
    grid-template-columns: auto minmax(0, 1fr) auto auto;
    gap: .8rem;
    padding: 1rem 1.1rem;
  }

  .page-faq .faq-item__tag {
    display: inline-flex;
  }

  .page-faq .faq-item__answer {
    padding: 1rem 1.1rem 1.25rem;
  }

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

@media (min-width: 820px) {
  .page-faq .faq-group {
    grid-template-columns: 5rem minmax(0, 1fr);
    gap: 1.5rem;
  }

  .page-faq .faq-group__num {
    position: sticky;
    top: 1.5rem;
    align-self: start;
    font-size: 1.6rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-deep__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }

  .page-faq .faq-deep__inner--table {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }

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

@media (min-width: 980px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, .75fr);
    align-items: start;
    gap: clamp(2rem, 4vw, 3.25rem);
  }

  .page-faq .faq-jump {
    margin-top: .5rem;
  }
}

@media (min-width: 1120px) {
  .page-faq .faq-group:nth-child(even) .faq-group__body {
    padding-left: 2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-help__card,
  .page-faq .faq-jump__link,
  .page-faq .faq-item__mark::after {
    transition: none;
  }

  .page-faq .faq-item:hover,
  .page-faq .faq-help__card:hover {
    transform: none;
  }
}