.page-faq {
  --faq-focus: 2px solid var(--cyan-soft);
  --bar: var(--cyan);
}

/* ============ 顶部档案横幅 ============ */
.page-faq .faq-banner {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: 3px solid var(--line);
  background: var(--panel);
}

.page-faq .faq-banner > img {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  object-position: 62% 42%;
  opacity: .34;
  filter: saturate(.7);
}

.page-faq .faq-banner-veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(120% 90% at 84% 10%, rgba(0, 229, 196, .16), transparent 62%),
    linear-gradient(180deg, rgba(7, 12, 24, .52) 0%, rgba(7, 12, 24, .86) 58%, var(--ink) 100%);
}

.page-faq .faq-banner-inner {
  position: relative;
  z-index: 2;
  padding-top: clamp(96px, 15vw, 168px);
  padding-bottom: clamp(30px, 6vw, 56px);
}

.page-faq .faq-banner .crumbs {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-capsule);
  background: rgba(7, 12, 24, .68);
  font-size: 13px;
  color: var(--muted);
}

.page-faq .faq-banner .crumbs a {
  color: var(--muted);
  text-decoration: none;
  transition: color 180ms var(--ease);
}

.page-faq .faq-banner .crumbs a:hover {
  color: var(--cyan);
}

.page-faq .faq-banner-inner .eyebrow {
  margin: 26px 0 0;
  font-size: 13px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-banner h1 {
  max-width: 24ch;
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(29px, 5.2vw, 54px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--text);
}

.page-faq .faq-lede {
  max-width: 52ch;
  margin: 20px 0 0;
  font-size: 17px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-banner-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

/* ============ 关键词定位条 ============ */
.page-faq .faq-quick {
  border-bottom: 3px solid var(--line);
  background: var(--panel);
}

.page-faq .faq-quick-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  padding-top: 18px;
  padding-bottom: 18px;
}

.page-faq .faq-quick-label {
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--dim);
  flex: none;
}

.page-faq .faq-quick-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-quick-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 15px;
  border: 2px solid var(--line);
  border-radius: var(--radius-capsule);
  background: var(--panel-2);
  color: var(--muted);
  font-size: 13px;
  letter-spacing: .04em;
  text-decoration: none;
  transition: border-color 180ms var(--ease), color 180ms var(--ease), transform 180ms var(--ease);
}

.page-faq .faq-quick-chip:hover,
.page-faq .faq-quick-chip:focus-visible {
  border-color: var(--cyan);
  color: var(--text);
  transform: translateY(-2px);
}

/* ============ 主体布局 ============ */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(28px, 5vw, 52px);
  padding-top: clamp(34px, 6vw, 68px);
  padding-bottom: clamp(52px, 8vw, 104px);
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(212px, 252px) minmax(0, 1fr);
    align-items: start;
  }
}

/* ============ 左侧组序号导航 ============ */
.page-faq .faq-rail {
  border: 2px solid var(--line);
  border-radius: var(--radius-panel);
  background: var(--panel);
  padding: 18px 16px;
  box-shadow: var(--shadow-hard);
}

@media (min-width: 960px) {
  .page-faq .faq-rail {
    position: sticky;
    top: 108px;
  }
}

.page-faq .faq-rail-title {
  margin: 0;
  font-size: 13px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--dim);
}

.page-faq .faq-rail-list {
  display: flex;
  gap: 10px;
  margin: 14px 0 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
}

.page-faq .faq-rail-list li {
  flex: none;
}

@media (min-width: 960px) {
  .page-faq .faq-rail-list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }
}

.page-faq .faq-rail-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border: 2px solid transparent;
  border-radius: 10px;
  background: var(--panel-2);
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 180ms var(--ease), color 180ms var(--ease), transform 180ms var(--ease);
}

.page-faq .faq-rail-link:hover,
.page-faq .faq-rail-link:focus-visible {
  border-color: var(--cyan);
  color: var(--text);
  transform: translateY(-2px);
}

.page-faq .faq-rail-idx {
  font-size: 14px;
  color: var(--cyan);
  flex: none;
}

.page-faq .faq-rail-foot {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--dim);
}

.page-faq .faq-rail-foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 196, .4);
}

/* ============ 分组 ============ */
.page-faq .faq-group {
  margin-bottom: clamp(42px, 7vw, 76px);
  scroll-margin-top: 118px;
}

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

.page-faq .faq-group--fee { --bar: var(--amber); }
.page-faq .faq-group--index { --bar: var(--cyan); }
.page-faq .faq-group--club { --bar: var(--cyan-soft); }
.page-faq .faq-group--device { --bar: var(--dim); }
.page-faq .faq-group--help { --bar: var(--orange); }

.page-faq .faq-group-head {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 14px;
  padding-bottom: 16px;
  border-bottom: 3px solid var(--line);
}

.page-faq .faq-group-head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 72px;
  height: 3px;
  background: var(--bar);
}

.page-faq .faq-group-num {
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1;
  color: var(--bar);
  letter-spacing: -.03em;
}

.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 3vw, 30px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -.02em;
  color: var(--text);
}

.page-faq .faq-group-note {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--dim);
}

/* ============ 问答资料卡 ============ */
.page-faq .faq-item {
  margin-top: 14px;
  border: 2px solid var(--line);
  border-left: 5px solid var(--bar);
  border-radius: var(--radius-panel);
  background: var(--panel);
  transition: border-color 180ms var(--ease), box-shadow 180ms var(--ease), transform 180ms var(--ease);
}

.page-faq .faq-item:not([open]):hover {
  transform: translateY(-2px);
  border-color: var(--bar);
  box-shadow: var(--shadow-hard-hover);
}

.page-faq .faq-item[open] {
  border-color: var(--bar);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 12px;
  padding: 18px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-q:focus-visible {
  outline: var(--faq-focus);
  outline-offset: -2px;
  border-radius: 10px;
}

.page-faq .faq-q-tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border: 1px solid var(--bar);
  border-radius: 6px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--bar);
  white-space: nowrap;
  margin-top: 2px;
}

.page-faq .faq-q-text {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--text);
}

.page-faq .faq-mark {
  position: relative;
  width: 18px;
  height: 18px;
  margin-top: 4px;
  flex: none;
}

.page-faq .faq-mark::before,
.page-faq .faq-mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--cyan);
  transform: translate(-50%, -50%);
  transition: transform 180ms var(--ease), opacity 180ms var(--ease);
}

.page-faq .faq-mark::before {
  width: 16px;
  height: 2px;
}

.page-faq .faq-mark::after {
  width: 2px;
  height: 16px;
}

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

.page-faq .faq-a {
  padding: 16px 16px 22px;
  border-top: 1px solid var(--line);
  animation: faqFadeIn 220ms var(--ease) 60ms both;
}

@keyframes faqFadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-faq .faq-a p {
  margin: 0 0 .9em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

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

.page-faq .faq-a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 196, .45);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

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

@media (min-width: 720px) {
  .page-faq .faq-q {
    padding: 22px 22px;
  }
  .page-faq .faq-a {
    padding: 18px 22px 26px;
  }
}

/* ============ 关注列表章节引子 ============ */
.page-faq .faq-club-intro {
  display: grid;
  gap: 20px;
  margin-top: 26px;
}

@media (min-width: 760px) {
  .page-faq .faq-club-intro {
    grid-template-columns: minmax(0, 1fr) 280px;
    align-items: start;
  }
}

.page-faq .faq-club-copy p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-figure {
  margin: 0;
  border: 2px solid var(--line);
  border-radius: var(--radius-panel);
  background: var(--panel);
  overflow: hidden;
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-faq .faq-figure .media-caption {
  display: block;
  padding: 12px 14px;
  border-top: 2px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--dim);
}

/* ============ 内联示意图 ============ */
.page-faq .faq-diagram {
  margin: 26px 0 0;
  border: 2px solid var(--line);
  border-radius: var(--radius-panel);
  background: linear-gradient(160deg, var(--panel-2) 0%, var(--panel) 68%);
  padding: 16px;
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-diagram-svg {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-faq .faq-diagram .media-caption {
  display: block;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--dim);
}

.page-faq .dg-frame {
  fill: var(--ink);
  stroke: var(--line);
  stroke-width: 2;
}

.page-faq .dg-node rect {
  fill: var(--panel-2);
  stroke: var(--line);
  stroke-width: 2;
}

.page-faq .dg-node text {
  fill: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
}

.page-faq .dg-line {
  fill: none;
  stroke: var(--cyan);
  stroke-width: 2;
  stroke-dasharray: 6 5;
  opacity: .8;
}

.page-faq .dg-result {
  fill: rgba(0, 229, 196, .12);
  stroke: var(--cyan);
  stroke-width: 2;
}

.page-faq .dg-result-label {
  fill: var(--cyan);
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: .06em;
}

.page-faq .dg-result-num {
  fill: var(--text);
  font-family: var(--font-num);
  font-size: 17px;
  letter-spacing: -.01em;
}

.page-faq .dg-cap {
  fill: var(--muted);
  font-family: var(--font-body);
  font-size: 14px;
  letter-spacing: .06em;
}

.page-faq .dg-bar rect {
  fill: var(--panel-2);
  stroke: var(--line);
  stroke-width: 2;
}

.page-faq .dg-bar--alt rect {
  fill: rgba(0, 229, 196, .1);
  stroke: var(--cyan);
  opacity: .9;
}

/* ============ 结尾求助区 ============ */
.page-faq .faq-outro {
  display: grid;
  gap: 22px;
  margin-top: 30px;
  padding: 24px 22px;
  border: 3px solid var(--orange);
  border-radius: var(--radius-panel);
  background: linear-gradient(150deg, rgba(255, 122, 41, .12) 0%, var(--panel) 55%);
  box-shadow: var(--shadow-hard);
}

@media (min-width: 800px) {
  .page-faq .faq-outro {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 30px 28px;
  }
}

.page-faq .faq-outro-copy h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.2;
  color: var(--text);
}

.page-faq .faq-outro-copy p {
  max-width: 48ch;
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

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

/* ============ 焦点与无障碍 ============ */
.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: var(--faq-focus);
  outline-offset: 2px;
}

@media (max-width: 480px) {
  .page-faq .faq-q {
    grid-template-columns: minmax(0, 1fr) auto;
  }
  .page-faq .faq-q-tag {
    grid-column: 1 / -1;
    justify-self: start;
    margin-top: 0;
    margin-bottom: 2px;
  }
  .page-faq .faq-outro-actions .btn {
    width: 100%;
    justify-content: center;
  }
}