/* ============ 帮助中心 · 页面专属样式 ============ */

.page-faq {
  display: block;
  color: var(--text);
  background: var(--ink-900);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(96px, 13vw, 148px) 0 clamp(38px, 6vw, 76px);
  overflow: hidden;
  background:
    radial-gradient(120% 82% at 10% 0%, rgba(34, 211, 238, .16) 0%, transparent 58%),
    radial-gradient(88% 66% at 94% 14%, rgba(163, 230, 53, .10) 0%, transparent 62%),
    linear-gradient(135deg, #0A1428 0%, #123055 55%, #0A1428 100%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
  align-items: center;
}

@media (min-width: 960px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

.page-faq .faq-hero-copy h1 {
  margin: .18em 0 .52em;
  font-family: var(--font-display);
  font-size: clamp(2.05rem, 5.8vw, 3.9rem);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: .02em;
  color: var(--text);
}

.page-faq .faq-lede {
  max-width: 56ch;
  margin: 0;
  font-size: clamp(1rem, 1.6vw, 1.1rem);
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-quick {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  margin: clamp(22px, 3.2vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-quick li {
  padding: 6px 0 6px 14px;
  border-left: 2px solid var(--cyan);
}

.page-faq .q-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--cyan-soft);
  letter-spacing: .01em;
}

.page-faq .q-note {
  display: block;
  margin-top: 4px;
  font-size: .82rem;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .faq-hero-visual {
  position: relative;
  margin: 0;
  background: var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-faq .faq-hero-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
  filter: saturate(.95) brightness(.95);
}

.page-faq .faq-hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(34, 211, 238, .2), transparent 56%);
  pointer-events: none;
}

/* ---------- 主体 ---------- */
.page-faq .faq-body {
  position: relative;
  padding: clamp(38px, 6vw, 78px) 0 clamp(56px, 8vw, 112px);
}

/* 分组索引：窄屏横向胶囊条 */
.page-faq .faq-rail {
  display: flex;
  flex-direction: row;
  gap: 8px;
  margin: 0 0 14px;
  padding: 4px 0 12px;
  overflow-x: auto;
  border-bottom: 1px dashed var(--line-soft);
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-rail::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-rail .rail-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  flex: 0 0 auto;
  padding: 9px 15px;
  border: 1px solid var(--line-soft);
  background: rgba(17, 31, 59, .6);
  color: var(--muted);
  font-size: .86rem;
  white-space: nowrap;
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
  transition: background .24s var(--ease), color .24s var(--ease), border-color .24s var(--ease);
}

.page-faq .faq-rail .rail-idx {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

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

.page-faq .faq-rail .rail-link[aria-current="true"] {
  background: var(--cyan-soft);
  border-color: var(--cyan-soft);
  color: var(--ink-900);
}

.page-faq .faq-rail .rail-link[aria-current="true"] .rail-idx {
  color: var(--ink-850);
}

@media (min-width: 941px) {
  .page-faq .faq-rail {
    position: sticky;
    top: 106px;
    align-self: start;
    flex-direction: column;
    gap: 6px;
    margin: 0;
    padding: 0;
    overflow: visible;
    border-bottom: 0;
  }

  .page-faq .faq-rail .rail-link {
    width: 100%;
  }
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  padding-top: clamp(30px, 4.4vw, 54px);
  scroll-margin-top: 104px;
}

.page-faq .faq-group:first-child {
  padding-top: 0;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(30px, 4.4vw, 54px);
  border-top: 1px dashed var(--line-soft);
}

.page-faq .faq-group-intro {
  max-width: 62ch;
  margin: 12px 0 0;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-group-body {
  display: grid;
  gap: clamp(18px, 2.8vw, 32px);
  align-items: start;
  margin-top: clamp(16px, 2.4vw, 26px);
}

.page-faq .faq-group-body > .faq-list {
  margin-top: 0;
}

@media (min-width: 1080px) {
  .page-faq .faq-group--fee .faq-group-body {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  }
}

/* ---------- 问答列表 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 12px;
  margin-top: clamp(16px, 2.4vw, 26px);
}

.page-faq .faq-item {
  position: relative;
  background: linear-gradient(180deg, rgba(17, 31, 59, .95), rgba(17, 31, 59, .72));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: background .26s var(--ease);
}

.page-faq .faq-item[open] {
  background: linear-gradient(180deg, rgba(19, 42, 77, .96), rgba(17, 31, 59, .86));
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--cyan);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform .32s var(--ease);
}

.page-faq .faq-item[open]::before {
  transform: scaleY(1);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 22px;
  cursor: pointer;
  list-style: none;
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.65;
  color: var(--text);
  transition: color .2s var(--ease);
}

.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item > summary::marker {
  content: "";
}

.page-faq .faq-item > summary:hover {
  color: var(--cyan-soft);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -3px;
}

.page-faq .faq-mark {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 5px;
  border: 1px solid var(--line);
  background: rgba(10, 20, 40, .6);
}

.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 .26s var(--ease), opacity .26s var(--ease);
}

.page-faq .faq-mark::before {
  width: 9px;
  height: 1.5px;
}

.page-faq .faq-mark::after {
  width: 1.5px;
  height: 9px;
}

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

.page-faq .faq-answer {
  padding: 0 22px 20px 54px;
}

.page-faq .faq-answer p {
  margin: 0 0 .72em;
  font-size: .95rem;
  line-height: 1.88;
  color: var(--muted);
}

.page-faq .faq-answer p:last-of-type {
  margin-bottom: 1em;
}

.page-faq .faq-answer .faq-lead {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.82;
  color: var(--text);
}

.page-faq .faq-answer .num {
  color: var(--cyan-soft);
}

.page-faq .faq-answer .mono-text {
  color: var(--cyan-soft);
  word-break: break-all;
}

.page-faq .faq-anchor {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border: 1px solid var(--line-soft);
  background: transparent;
  color: var(--muted);
  font-family: var(--font-body);
  font-size: .75rem;
  line-height: 1.4;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%);
  transition: color .22s var(--ease), border-color .22s var(--ease);
}

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

.page-faq .faq-anchor[data-copied="true"] {
  color: var(--lime);
  border-color: var(--lime);
}

/* ---------- 费用区侧图 ---------- */
.page-faq .faq-group-figure {
  position: relative;
  margin: 0;
  background: var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-faq .faq-group-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  filter: saturate(.92) brightness(.94);
}

.page-faq .faq-group-figure .figure-cap {
  display: block;
  padding: 10px 16px 16px;
  font-size: .78rem;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-outro {
  margin-top: clamp(38px, 5.4vw, 68px);
  padding: clamp(24px, 3.4vw, 40px) clamp(20px, 3vw, 38px);
  background:
    radial-gradient(120% 140% at 6% 0%, rgba(34, 211, 238, .18) 0%, transparent 62%),
    linear-gradient(135deg, rgba(19, 42, 77, .95), rgba(10, 20, 40, .95));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-faq .faq-outro-text {
  max-width: 64ch;
  margin: 10px 0 0;
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  line-height: 1.85;
  color: var(--text);
}

.page-faq .faq-outro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(18px, 2.6vw, 26px);
}

/* ---------- 窄屏微调 ---------- */
@media (max-width: 560px) {
  .page-faq .faq-item > summary {
    padding: 14px 16px;
    font-size: .97rem;
  }

  .page-faq .faq-answer {
    padding: 0 16px 18px 48px;
  }

  .page-faq .faq-group-figure .figure-cap {
    padding: 9px 14px 14px;
  }
}