/* ===== 数据使用指南 / 页面专属样式 ===== */
.page-faq {
  --faq-rail-w: 236px;
  --faq-gap: clamp(28px, 4vw, 56px);
  --faq-item-open: #1B2036;
}

.page-faq .faq-crumb {
  padding-top: clamp(20px, 3vw, 34px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(24px, 4vw, 44px) 0 clamp(36px, 5vw, 64px);
  overflow: hidden;
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

.page-faq .faq-hero-grid > * {
  min-width: 0;
}

@media (min-width: 920px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: end;
  }
}

.page-faq .faq-title {
  margin: 12px 0 18px;
  font-size: clamp(40px, 9.5vw, 76px);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: 0.04em;
  color: var(--text);
}

.page-faq .faq-title::after {
  content: "";
  display: block;
  width: clamp(76px, 18vw, 180px);
  height: 3px;
  margin-top: 20px;
  background: linear-gradient(90deg, var(--purple), var(--cyan));
}

.page-faq .faq-hero .lede {
  max-width: 46ch;
  margin: 0;
  color: var(--text);
  font-size: var(--fs-18);
  line-height: 1.78;
}

.page-faq .faq-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: 26px 0 0;
  padding: 14px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
  font-size: var(--fs-13);
  color: var(--muted);
}

.page-faq .faq-hero-meta .mono {
  margin-right: 5px;
  color: var(--cyan);
  font-weight: 600;
}

/* 首屏纯 CSS 视觉 */
.page-faq .faq-hero-visual {
  position: relative;
  min-height: 190px;
  padding-top: 10px;
}

.page-faq .fhv-grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: repeating-linear-gradient(112deg, rgba(42, 48, 70, 0.55) 0 1px, transparent 1px 20px);
}

.page-faq .fhv-chip {
  position: relative;
  z-index: 1;
  display: inline-grid;
  gap: 2px;
  padding: 16px 26px;
  margin: clamp(18px, 5vw, 34px) 0 0 clamp(0px, 6%, 44px);
  background: rgba(108, 61, 255, 0.18);
  border: 1px solid rgba(108, 61, 255, 0.55);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-faq .fhv-chip-label {
  font-size: var(--fs-11);
  letter-spacing: 0.22em;
  color: var(--purple-soft);
}

.page-faq .fhv-chip-value {
  font-size: var(--fs-34);
  line-height: 1.1;
  font-weight: 600;
  color: var(--cyan);
}

.page-faq .fhv-rule {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 26px;
  z-index: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--purple) 0%, var(--grid) 45%, transparent 100%);
}

.page-faq .fhv-rule::after {
  content: "";
  position: absolute;
  inset: -6px 0 auto 0;
  height: 13px;
  background-image: repeating-linear-gradient(90deg, var(--grid) 0 1px, transparent 1px 24px);
  opacity: 0.8;
}

/* ---------- 检索区 ---------- */
.page-faq .faq-finder {
  padding: clamp(24px, 4vw, 40px) 0;
  background: var(--night);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-search {
  display: grid;
  gap: 8px;
  max-width: 720px;
}

.page-faq .faq-search-label {
  font-family: var(--font-mono);
  font-size: var(--fs-11);
  letter-spacing: 0.24em;
  color: var(--purple-soft);
}

.page-faq .faq-search-input {
  width: 100%;
  padding: 14px 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--purple);
  color: var(--text);
  font-family: inherit;
  font-size: var(--fs-18);
  line-height: 1.4;
}

.page-faq .faq-search-input::placeholder {
  color: #6B7391;
  letter-spacing: 0.02em;
}

.page-faq .faq-search-input:focus {
  outline: none;
  border-color: var(--purple-soft);
  border-left-color: var(--cyan);
  background: var(--faq-item-open);
}

.page-faq .faq-search-hint {
  margin: 0;
  font-size: var(--fs-13);
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .faq-jump a {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  padding: 8px 14px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--purple);
  color: var(--text);
  font-size: var(--fs-13);
  text-decoration: none;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  border-left-color: var(--cyan);
  color: var(--purple-soft);
}

.page-faq .faq-jump .mono {
  font-size: var(--fs-11);
  letter-spacing: 0.12em;
  color: var(--muted);
}

/* ---------- 主体栅格 ---------- */
.page-faq .faq-body {
  padding: clamp(36px, 5vw, 72px) 0 0;
}

.page-faq .faq-body-grid {
  display: grid;
  gap: var(--faq-gap);
}

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

@media (min-width: 1000px) {
  .page-faq .faq-body-grid {
    grid-template-columns: minmax(0, 1fr) var(--faq-rail-w);
    grid-template-areas: "stream rail";
    align-items: start;
  }

  .page-faq .faq-stream {
    grid-area: stream;
  }

  .page-faq .faq-rail {
    grid-area: rail;
    position: sticky;
    top: 92px;
  }
}

/* ---------- 问题索引侧栏 ---------- */
.page-faq .faq-rail {
  padding-top: 14px;
  border-top: 2px solid var(--purple);
}

.page-faq .faq-rail-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-11);
  letter-spacing: 0.24em;
  color: var(--muted);
}

.page-faq .faq-rail-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-rail-list a {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  padding: 7px 8px 7px 10px;
  border-left: 2px solid transparent;
  color: var(--muted);
  font-size: var(--fs-13);
  line-height: 1.5;
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-faq .faq-rail-list a:hover,
.page-faq .faq-rail-list a:focus-visible {
  color: var(--text);
  border-left-color: var(--purple);
  background: rgba(108, 61, 255, 0.12);
}

.page-faq .faq-rail-list .mono {
  font-size: var(--fs-11);
  letter-spacing: 0.06em;
  color: var(--purple-soft);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group + .faq-group {
  margin-top: clamp(40px, 5vw, 72px);
}

.page-faq .faq-group-head {
  position: relative;
  padding-top: 16px;
  margin-bottom: 22px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-group-head::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 88px;
  height: 2px;
  background: var(--purple);
}

.page-faq .faq-group-title {
  margin: 10px 0 8px;
  font-size: clamp(24px, 3.6vw, 34px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: 0.04em;
  color: var(--text);
}

.page-faq .faq-group-note {
  margin: 0;
  max-width: 60ch;
  font-size: var(--fs-15);
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-item {
  margin-top: 10px;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--grid);
  transition: border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-faq .faq-item:not([open]):hover {
  border-left-color: var(--purple-soft);
}

.page-faq .faq-item[open] {
  background: var(--faq-item-open);
  border-left-color: var(--purple);
}

.page-faq .faq-q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) 16px;
  gap: 12px;
  align-items: center;
  padding: 16px 18px;
  list-style: none;
  cursor: pointer;
  font-size: var(--fs-18);
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
}

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

.page-faq .faq-q::marker {
  content: "";
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--purple-soft);
  outline-offset: -2px;
}

.page-faq .faq-num {
  font-size: var(--fs-13);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--purple-soft);
}

.page-faq .faq-q-text {
  min-width: 0;
}

.page-faq .faq-mark {
  position: relative;
  width: 16px;
  height: 16px;
  justify-self: end;
}

.page-faq .faq-mark::before,
.page-faq .faq-mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1.5px;
  background: var(--purple-soft);
  transition: transform 0.25s var(--ease);
}

.page-faq .faq-mark::after {
  transform: rotate(90deg);
}

.page-faq .faq-item[open] .faq-mark::after {
  transform: rotate(0deg);
}

.page-faq .faq-a {
  padding: 0 18px 18px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-a p {
  margin: 14px 0 0;
  max-width: 66ch;
  font-size: var(--fs-15);
  line-height: 1.8;
  color: var(--text);
}

.page-faq .faq-a p + p {
  margin-top: 10px;
}

.page-faq .faq-a a {
  color: var(--purple-soft);
  text-decoration: underline;
  text-decoration-color: rgba(169, 139, 255, 0.45);
  text-underline-offset: 3px;
}

.page-faq .faq-a a:hover,
.page-faq .faq-a a:focus-visible {
  color: var(--cyan);
  text-decoration-color: rgba(0, 240, 200, 0.5);
}

.page-faq .faq-a .faq-a-note {
  font-family: var(--font-mono);
  font-size: var(--fs-11);
  letter-spacing: 0.14em;
  color: var(--muted);
}

/* 引用格式块 */
.page-faq .faq-ref {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
  padding: 14px 16px;
  background: var(--ink);
  border: 1px dashed var(--line);
}

.page-faq .faq-ref-text {
  flex: 1 1 260px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: var(--purple-soft);
  word-break: break-word;
}

.page-faq .faq-ref .btn {
  flex: 0 0 auto;
  white-space: nowrap;
}

/* ---------- 窄幅提示带 ---------- */
.page-faq .faq-tip {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 20px;
  margin: clamp(28px, 3.5vw, 44px) 0;
  padding: 16px 20px;
  border: 1px solid rgba(0, 240, 200, 0.45);
  border-left: 3px solid var(--cyan);
  background: linear-gradient(90deg, rgba(0, 240, 200, 0.07), transparent 65%);
}

.page-faq .faq-tip p {
  margin: 0;
  max-width: 58ch;
  font-size: var(--fs-15);
  line-height: 1.72;
  color: var(--text);
}

.page-faq .faq-tip a {
  white-space: nowrap;
  font-size: var(--fs-13);
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 240, 200, 0.4);
  padding-bottom: 2px;
}

.page-faq .faq-tip a:hover,
.page-faq .faq-tip a:focus-visible {
  border-bottom-color: var(--cyan);
  border-bottom-width: 2px;
}

/* ---------- 插图 ---------- */
.page-faq .faq-figure {
  margin: clamp(22px, 3vw, 36px) 0;
}

.page-faq .faq-figure .media {
  background: var(--night);
  border: 1px solid var(--line);
}

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

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  max-width: 60ch;
  font-size: var(--fs-13);
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 仍未解决 ---------- */
.page-faq .faq-help {
  margin-top: clamp(52px, 7vw, 96px);
  padding: clamp(32px, 5vw, 64px) 0;
  border-top: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(108, 61, 255, 0.16), rgba(108, 61, 255, 0.03) 52%, transparent 78%),
    var(--night);
}

.page-faq .faq-help-inner {
  display: grid;
  gap: 20px;
}

@media (min-width: 900px) {
  .page-faq .faq-help-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 48px;
  }
}

.page-faq .faq-help-title {
  margin: 10px 0 12px;
  font-size: clamp(24px, 3.6vw, 34px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: 0.04em;
  color: var(--text);
}

.page-faq .faq-help p {
  margin: 0;
  max-width: 62ch;
  font-size: var(--fs-15);
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-help p + p {
  margin-top: 10px;
}

.page-faq .faq-help-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-help-actions .btn {
  white-space: nowrap;
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-mark::before,
  .page-faq .faq-mark::after,
  .page-faq .faq-item,
  .page-faq .faq-rail-list a,
  .page-faq .faq-jump a {
    transition: none;
  }
}