.page-faq {
  --faq-gap: clamp(22px, 4vw, 40px);
  padding-top: clamp(18px, 3vw, 32px);
  padding-bottom: clamp(52px, 8vw, 104px);
}

.page-faq .breadcrumbs {
  margin-bottom: clamp(20px, 3vw, 32px);
}

/* ---------- 首屏 ---------- */
.page-faq .tutorial-hero {
  position: relative;
  padding-bottom: clamp(26px, 4vw, 44px);
  border-bottom: 1px solid var(--line-green);
}

.page-faq .tutorial-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 88px;
  height: 2px;
  background: var(--neon);
}

.page-faq .tutorial-hero h1 {
  margin: 14px 0 18px;
  max-width: 20ch;
  font-family: var(--font-display);
  font-size: clamp(34px, 6.2vw, 76px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: 0.005em;
  color: var(--text);
}

.page-faq .tutorial-hero .lede {
  max-width: 620px;
  margin: 0;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .hero-stats {
  list-style: none;
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-faq .hero-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background: var(--stand-green);
}

.page-faq .hero-num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 600;
  line-height: 1;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.page-faq .hero-num .unit {
  margin-left: 3px;
  font-size: 13px;
  font-weight: 400;
  color: var(--muted);
}

.page-faq .hero-txt {
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- 问答墙骨架 ---------- */
.page-faq .faq-wall {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  margin-top: clamp(32px, 5vw, 56px);
}

.page-faq .faq-index,
.page-faq .faq-main,
.page-faq .faq-rail {
  min-width: 0;
}

/* ---------- 问题索引 ---------- */
.page-faq .faq-index {
  order: -1;
}

.page-faq .index-label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

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

.page-faq .index-item {
  flex: 0 0 auto;
}

.page-faq .index-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  font-size: 14px;
  line-height: 1.3;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.page-faq .index-link:hover {
  color: var(--text);
  border-color: var(--neon);
}

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

.page-faq .index-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--line-green);
}

.page-faq:has(#faq-start:target) .index-link[href="#faq-start"],
.page-faq:has(#faq-round:target) .index-link[href="#faq-round"],
.page-faq:has(#faq-sort:target) .index-link[href="#faq-sort"],
.page-faq:has(#faq-mobile:target) .index-link[href="#faq-mobile"],
.page-faq:has(#faq-fresh:target) .index-link[href="#faq-fresh"],
.page-faq:has(#faq-fix:target) .index-link[href="#faq-fix"],
.page-faq:has(#faq-pin:target) .index-link[href="#faq-pin"] {
  color: var(--text);
  border-color: rgba(59, 242, 200, 0.6);
  background: rgba(59, 242, 200, 0.08);
}

.page-faq:has(#faq-start:target) .index-link[href="#faq-start"] .index-num,
.page-faq:has(#faq-round:target) .index-link[href="#faq-round"] .index-num,
.page-faq:has(#faq-sort:target) .index-link[href="#faq-sort"] .index-num,
.page-faq:has(#faq-mobile:target) .index-link[href="#faq-mobile"] .index-num,
.page-faq:has(#faq-fresh:target) .index-link[href="#faq-fresh"] .index-num,
.page-faq:has(#faq-fix:target) .index-link[href="#faq-fix"] .index-num,
.page-faq:has(#faq-pin:target) .index-link[href="#faq-pin"] .index-num {
  color: var(--neon);
}

/* ---------- 问答主体 ---------- */
.page-faq .faq-item {
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

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

.page-faq .faq-q {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 0;
  padding: 22px 46px 22px 0;
  list-style: none;
  cursor: pointer;
}

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

.page-faq .faq-q h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.2vw, 27px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: var(--text);
  transition: color 0.18s ease;
}

.page-faq .faq-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--neon);
}

.page-faq .faq-q::after {
  content: "+";
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--muted);
  transition: color 0.18s ease;
}

.page-faq .faq-item[open] .faq-q::after {
  content: "−";
  color: var(--neon);
}

.page-faq .faq-q:hover h2 {
  color: var(--neon);
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.page-faq .faq-item:target .faq-q h2 {
  color: var(--neon);
}

.page-faq .faq-a {
  padding-bottom: 28px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-a p {
  max-width: 64ch;
  margin: 0 0 12px;
}

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

/* ---------- 三步步骤条 ---------- */
.page-faq .steps {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
}

.page-faq .step {
  position: relative;
  margin-left: 13px;
  padding: 0 0 24px 44px;
  border-left: 1px solid var(--line-green);
}

.page-faq .step:last-child {
  padding-bottom: 4px;
  border-left-color: transparent;
}

.page-faq .step-num {
  position: absolute;
  left: -13px;
  top: -2px;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-green);
  border-radius: 50%;
  background: var(--panel-green);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--neon);
  transition: border-color 0.18s ease;
}

.page-faq .step-txt {
  margin: 0 0 8px;
  max-width: 62ch;
  color: var(--text);
  line-height: 1.75;
}

.page-faq .step-hint {
  margin: 0;
  padding-left: 10px;
  border-left: 2px solid var(--line-green);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.01em;
  color: var(--muted);
  transition: border-color 0.18s ease, color 0.18s ease;
}

.page-faq .step:hover .step-num {
  border-color: var(--neon);
}

.page-faq .step:hover .step-hint {
  border-left-color: var(--neon);
  color: var(--mist);
}

/* ---------- 排序示意 ---------- */
.page-faq .sort-svg {
  display: block;
  width: 100%;
  max-width: 520px;
  height: auto;
  margin: 14px 0 18px;
}

.page-faq .sort-svg .chip-on {
  fill: var(--neon);
}

.page-faq .sort-svg .chip-off {
  fill: none;
  stroke: var(--line-green);
  stroke-width: 1.5;
}

.page-faq .sort-svg .svg-text-on {
  fill: var(--ink-abyss);
  font-family: var(--font-mono);
  font-size: 13px;
}

.page-faq .sort-svg .svg-text-off {
  fill: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
}

.page-faq .sort-svg .bar {
  fill: var(--line-green);
}

.page-faq .sort-svg .bar-hi {
  fill: var(--neon);
}

.page-faq .sort-svg .bar-shot {
  fill: var(--shot);
}

.page-faq .sort-svg .grid-line {
  stroke: var(--line-soft);
  stroke-width: 1;
}

/* ---------- 配图 ---------- */
.page-faq .faq-fig {
  margin: 18px 0 6px;
  border: 1px solid var(--line-green);
  border-radius: var(--radius-md);
  overflow: hidden;
}

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

.page-faq .faq-fig .media-frame__caption,
.page-faq .rail-media .media-frame__caption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 右侧辅助栏 ---------- */
.page-faq .faq-rail {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-faq .rail-media {
  margin: 0;
  border: 1px solid var(--line-green);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--stand-green);
}

.page-faq .rail-card {
  padding: 18px;
  border: 1px solid var(--line-green);
  border-radius: var(--radius-md);
  background: var(--stand-green);
}

.page-faq .rail-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-faq .rail-links ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .rail-links a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 15px;
  line-height: 1.5;
  color: var(--text);
  text-decoration: none;
  transition: color 0.18s ease;
}

.page-faq .rail-links a::before {
  content: "→";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--neon);
}

.page-faq .rail-links a:hover {
  color: var(--neon);
}

.page-faq .rail-links a:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.page-faq .rail-note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.9;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 1100px) {
  .page-faq .faq-wall {
    grid-template-columns: 216px minmax(0, 1fr) 286px;
    align-items: start;
  }

  .page-faq .faq-index,
  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-faq .faq-index {
    order: 0;
  }

  .page-faq .index-list {
    display: block;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--line-green);
  }

  .page-faq .index-item {
    position: relative;
  }

  .page-faq .index-link {
    padding: 10px 0 10px 18px;
    border: 0;
    border-radius: 0;
    font-size: 15px;
    white-space: normal;
    background: none;
  }

  .page-faq .index-link:hover {
    border-color: transparent;
  }

  .page-faq:has(#faq-start:target) .index-link[href="#faq-start"],
  .page-faq:has(#faq-round:target) .index-link[href="#faq-round"],
  .page-faq:has(#faq-sort:target) .index-link[href="#faq-sort"],
  .page-faq:has(#faq-mobile:target) .index-link[href="#faq-mobile"],
  .page-faq:has(#faq-fresh:target) .index-link[href="#faq-fresh"],
  .page-faq:has(#faq-fix:target) .index-link[href="#faq-fix"],
  .page-faq:has(#faq-pin:target) .index-link[href="#faq-pin"] {
    background: none;
    box-shadow: inset 2px 0 0 var(--neon);
  }

  .page-faq .faq-q {
    padding-right: 52px;
  }

  .page-faq .faq-a {
    max-width: 70ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .index-link,
  .page-faq .faq-q h2,
  .page-faq .faq-q::after,
  .page-faq .step-num,
  .page-faq .step-hint,
  .page-faq .rail-links a {
    transition: none;
  }
}