.page-faq {
  --faq-cut: 16px;
  --faq-num-col: 3.25rem;
}

/* ---------- 首屏氛围 ---------- */

.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(2.25rem, 6vw, 4.5rem) 0 clamp(1.75rem, 4vw, 3rem);
  background:
    radial-gradient(110% 80% at 8% 0%, rgba(53, 240, 200, 0.13), transparent 58%),
    radial-gradient(90% 90% at 96% 10%, rgba(138, 92, 255, 0.14), transparent 62%),
    linear-gradient(168deg, var(--ink-deep) 0%, var(--ink-0) 46%, var(--ink-1) 100%);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__texture {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(53, 240, 200, 0.07) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(53, 240, 200, 0.05) 0 1px, transparent 1px 96px);
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 80%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 80%);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: var(--sp-4);
}

.page-faq .faq-hero h1 {
  max-width: 20ch;
  margin: 0;
  text-shadow: 0 2px 0 rgba(255, 90, 60, 0.18);
}

.page-faq .faq-hero .lede {
  max-width: 40em;
  margin: 0;
  color: var(--cream-dim);
}

.page-faq .faq-hero__media {
  margin-top: var(--sp-5);
  position: relative;
}

.page-faq .faq-hero__media::before {
  content: "";
  position: absolute;
  top: -10px;
  left: 0;
  width: 96px;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), rgba(53, 240, 200, 0));
}

/* ---------- 主体画布 ---------- */

.page-faq .faq-body {
  background: var(--ink-0);
  padding-top: var(--sp-8);
  padding-bottom: var(--sp-9);
}

.page-faq .faq-grid {
  align-items: start;
}

.page-faq .faq-side {
  align-self: start;
  margin-bottom: var(--sp-7);
}

@media (min-width: 900px) {
  .page-faq .faq-side {
    margin-bottom: 0;
    position: sticky;
    top: 96px;
  }
}

/* ---------- 场景索引 ---------- */

.page-faq .scene-index {
  border-top: 2px solid var(--cyan);
  padding-top: var(--sp-4);
}

.page-faq .scene-list {
  list-style: none;
  margin: var(--sp-4) 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .scene-list a {
  display: flex;
  align-items: baseline;
  gap: var(--sp-3);
  padding: 9px 12px;
  color: var(--cream-dim);
  text-decoration: none;
  font-size: var(--fs-sm);
  line-height: 1.5;
  border-left: 2px solid var(--line);
  transition: color 160ms ease, background 160ms ease, border-color 160ms ease;
}

.page-faq .scene-list a:hover,
.page-faq .scene-list a:focus-visible {
  color: var(--cream);
  background: var(--cyan-mist);
  border-left-color: var(--cyan);
}

.page-faq .scene-num {
  flex: none;
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-faq .scene-index__cta {
  margin-top: var(--sp-5);
  width: 100%;
  justify-content: center;
}

/* ---------- 筛选条 ---------- */

.page-faq .faq-stream .filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-2);
  padding-bottom: var(--sp-4);
  border-bottom: 1px solid var(--line);
  margin-bottom: var(--sp-7);
}

.page-faq .faq-filter-status {
  margin-left: auto;
  font-size: var(--fs-xs);
  letter-spacing: 0.06em;
  color: var(--cream-faint);
}

/* ---------- 问题分组 ---------- */

.page-faq .qa-group {
  scroll-margin-top: 96px;
}

.page-faq .qa-group + .qa-group {
  margin-top: clamp(2.5rem, 6vw, 4.5rem);
}

.page-faq .qa-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "num title"
    "num intro";
  column-gap: var(--sp-4);
  row-gap: var(--sp-2);
  align-items: baseline;
  padding-bottom: var(--sp-4);
  border-bottom: 1px solid var(--line);
  margin-bottom: var(--sp-4);
}

.page-faq .qa-group__num {
  grid-area: num;
  font-size: clamp(1.35rem, 3.4vw, 2rem);
  line-height: 1;
  color: var(--cyan);
  opacity: 0.9;
}

.page-faq .qa-group__head h2 {
  grid-area: title;
  margin: 0;
}

.page-faq .qa-group__intro {
  grid-area: intro;
  margin: 0;
  max-width: 40em;
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--cream-faint);
}

@keyframes faq-slip {
  0%, 100% { transform: translateX(0); }
  40% { transform: translateX(-2px); }
  70% { transform: translateX(2px); }
}

.page-faq .qa-group__head:hover .qa-group__num {
  animation: faq-slip 200ms steps(2, end) 1;
}

/* ---------- 折叠问答 ---------- */

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

.page-faq .accordion__item:last-child {
  border-bottom: none;
}

.page-faq .accordion__trigger {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-4);
  width: 100%;
  padding: var(--sp-4) 0;
  text-align: left;
}

.page-faq .qa-num {
  flex: none;
  min-width: var(--faq-num-col);
  font-size: var(--fs-xs);
  line-height: 1.1;
  letter-spacing: 0.12em;
  color: var(--cyan);
  padding-bottom: 3px;
  border-bottom: 2px solid var(--cyan);
}

.page-faq .qa-q {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-md);
  line-height: 1.5;
  color: var(--cream);
}

.page-faq .accordion__panel p {
  margin: 0;
  max-width: 36em;
  font-size: var(--fs-base);
  line-height: 1.8;
  color: var(--cream-dim);
}

.page-faq .accordion__panel a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (min-width: 720px) {
  .page-faq .accordion__panel {
    padding-left: calc(var(--faq-num-col) + var(--sp-4));
  }
}

/* ---------- 路径示意图 ---------- */

.page-faq .faq-figure {
  margin: var(--sp-6) 0 0;
}

.page-faq .faq-media--paths {
  aspect-ratio: 12 / 7;
}

.page-faq .faq-figure figcaption {
  margin-top: var(--sp-3);
  font-size: var(--fs-xs);
  line-height: 1.7;
  color: var(--cream-faint);
}

/* ---------- 求助面板 ---------- */

.page-faq .qa-group--help .help-panel {
  background: linear-gradient(152deg, var(--ink-1) 0%, rgba(10, 29, 24, 0.94) 62%, var(--ink-0) 100%);
  border: 1px solid var(--line);
}

.page-faq .help-list {
  list-style: none;
  margin: 0 0 var(--sp-6);
  padding: 0;
  display: grid;
  gap: var(--sp-3);
}

.page-faq .help-list li {
  display: flex;
  align-items: baseline;
  gap: var(--sp-3);
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--cream-dim);
}

.page-faq .help-list__num {
  flex: none;
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-faq .help-channels {
  display: grid;
  gap: var(--sp-4);
}

@media (min-width: 760px) {
  .page-faq .help-channels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-faq .help-channel {
  display: grid;
  justify-items: start;
  gap: var(--sp-3);
  padding: var(--sp-5);
  background: var(--cyan-mist);
  border-left: 2px solid var(--cyan);
}

.page-faq .help-value {
  margin: 0;
  font-size: var(--fs-md);
  color: var(--cream);
  word-break: break-all;
}

.page-faq .help-note {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--cream-faint);
}

.page-faq .help-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin-top: var(--sp-6);
}

/* ---------- 窄屏适配 ---------- */

@media (max-width: 899px) {
  .page-faq .qa-group__head {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "num"
      "title"
      "intro";
    row-gap: var(--sp-3);
  }

  .page-faq .qa-group__num {
    font-size: 1.15rem;
  }

  .page-faq .faq-filter-status {
    margin-left: 0;
    width: 100%;
  }
}

@media (max-width: 560px) {
  .page-faq .qa-num {
    min-width: 2.2rem;
  }

  .page-faq .qa-q {
    font-size: var(--fs-base);
  }

  .page-faq .help-actions .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-group__head:hover .qa-group__num {
    animation: none;
  }

  .page-faq .scene-list a {
    transition: none;
  }
}