.page-faq {
  --faq-rail: 264px;
  --faq-num-col: 54px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 60px) 0 76px;
  background:
    radial-gradient(120% 88% at 14% 0%, rgba(69, 240, 224, 0.10), transparent 62%),
    radial-gradient(90% 70% at 92% 10%, rgba(255, 138, 61, 0.08), transparent 65%),
    linear-gradient(180deg, var(--ink-900) 0%, #101a42 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 76px 76px;
  opacity: 0.2;
  -webkit-mask-image: radial-gradient(88% 72% at 74% 18%, #000 0%, transparent 76%);
  mask-image: radial-gradient(88% 72% at 74% 18%, #000 0%, transparent 76%);
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 26px;
}

.page-faq .faq-hero h1 {
  margin: 16px 0 0;
  max-width: 19ch;
  font-family: var(--font-display);
  font-size: clamp(30px, 5vw, 52px);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-hero .lede {
  margin: 22px 0 0;
  max-width: 64ch;
  color: var(--muted);
  font-size: 16.5px;
  line-height: 1.78;
}

/* ---------- 左索引 + 右内容 ---------- */
.page-faq .page-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  padding-top: 76px;
  padding-bottom: 96px;
}

.page-faq .index-title {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-faq .index-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  border-bottom: 1px solid var(--line);
}

.page-faq .index-link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 14px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color 0.16s var(--ease), background-color 0.16s var(--ease);
}

.page-faq .index-link::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: transparent;
  transition: background-color 0.16s var(--ease);
}

.page-faq .index-link:hover,
.page-faq .index-link:focus-visible,
.page-faq .index-link[aria-current="true"],
.page-faq .index-link[aria-current="page"] {
  color: var(--text);
  background: rgba(69, 240, 224, 0.05);
}

.page-faq .index-link:hover::before,
.page-faq .index-link:focus-visible::before,
.page-faq .index-link[aria-current="true"]::before,
.page-faq .index-link[aria-current="page"]::before {
  background: var(--cyan);
}

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

.page-faq .index-num {
  flex: none;
  min-width: 18px;
  color: var(--cyan);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

/* ---------- 章节骨架 ---------- */
.page-faq .faq-section {
  scroll-margin-top: calc(var(--header-h) + 24px);
  padding-bottom: 64px;
}

.page-faq .faq-section + .faq-section {
  padding-top: 64px;
  border-top: 1px solid var(--line);
}

.page-faq .section-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.2vw, 33px);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.005em;
  color: var(--text);
}

.page-faq .section-lede {
  margin: 0 0 36px;
  max-width: 68ch;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.78;
}

.page-faq .sub-title {
  margin: 8px 0 22px;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
}

.page-faq .stat-value {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--cyan);
}

.page-faq .sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 三步上手 ---------- */
.page-faq .step-head {
  display: grid;
  gap: 30px;
  margin-bottom: 44px;
}

.page-faq .step-head .section-lede {
  margin-bottom: 0;
}

.page-faq .step-figure {
  margin: 0;
  overflow: hidden;
  background: var(--ink-800);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-faq .step-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-faq .step-list {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .step-list::before {
  content: "";
  position: absolute;
  left: calc(var(--faq-num-col) / 2);
  top: 24px;
  bottom: 48px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--line) 62%, transparent 100%);
  opacity: 0.7;
}

.page-faq .step-item {
  display: grid;
  grid-template-columns: var(--faq-num-col) minmax(0, 1fr);
  gap: 22px;
  align-items: start;
  padding: 20px 0;
}

.page-faq .step-num {
  position: relative;
  padding: 4px 0 10px;
  text-align: center;
  background: var(--ink-900);
  font-family: var(--font-display);
  font-size: 29px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-faq .step-title {
  margin: 0 0 10px;
  font-size: 18.5px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
}

.page-faq .step-body p {
  margin: 0 0 14px;
  max-width: 64ch;
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.76;
}

.page-faq .step-body .step-check {
  display: inline-flex;
  gap: 10px;
  align-items: baseline;
  margin: 0;
  padding: 10px 18px 10px 16px;
  border-left: 2px solid var(--cyan);
  border-radius: 0 var(--r-cut) var(--r-cut) 0;
  background: linear-gradient(90deg, rgba(69, 240, 224, 0.10), transparent 86%);
  color: var(--text);
  font-size: 14px;
  line-height: 1.62;
}

.page-faq .step-check span {
  flex: none;
  color: var(--cyan-soft);
  font-weight: 600;
}

/* ---------- 回访入口 ---------- */
.page-faq .revisit-panel {
  padding: 34px 28px 26px;
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(255, 138, 61, 0.10), transparent 58%),
    var(--ink-800);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 26px 100%, 0 calc(100% - 26px));
  transition: border-color 0.2s var(--ease);
}

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

.page-faq .two-step {
  display: grid;
  gap: 24px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.page-faq .two-step-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.page-faq .two-step-num {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--orange);
  border-radius: 50%;
  color: var(--orange);
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.page-faq .two-step-item h3 {
  margin: 4px 0 8px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
}

.page-faq .two-step-item p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.72;
}

.page-faq .revisit-note {
  margin: 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  line-height: 1.72;
}

/* ---------- 对照栏读法 ---------- */
.page-faq .read-pair {
  display: grid;
  gap: 1px;
  margin-bottom: 44px;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-faq .read-col {
  padding: 30px 26px;
  background: var(--ink-800);
  transition: background-color 0.2s var(--ease);
}

.page-faq .read-col:hover {
  background: var(--ink-700);
}

.page-faq .read-col--accent {
  background: var(--ink-700);
}

.page-faq .read-col h3 {
  margin: 16px 0 10px;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
}

.page-faq .read-col p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.76;
}

.page-faq .tag {
  display: inline-block;
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(69, 240, 224, 0.08);
  color: var(--cyan-soft);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-faq .locate-list {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .locate-list li {
  padding: 18px 0 0;
  border-top: 2px solid var(--line);
  transition: border-color 0.18s var(--ease);
}

.page-faq .locate-list li:hover {
  border-color: var(--cyan);
}

.page-faq .locate-key {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
}

.page-faq .locate-list p {
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.72;
}

/* ---------- 帮助文档与会员权益 ---------- */
.page-faq .split-table {
  width: 100%;
  border: 1px solid var(--line);
  border-collapse: collapse;
  font-size: 15px;
}

.page-faq .split-table th,
.page-faq .split-table td {
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  line-height: 1.7;
}

.page-faq .split-table thead th {
  background: var(--ink-800);
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.page-faq .split-table tbody th {
  color: var(--text);
  font-weight: 600;
  white-space: nowrap;
}

.page-faq .split-table tbody td {
  color: var(--muted);
}

.page-faq .split-table tbody tr {
  transition: background-color 0.18s var(--ease);
}

.page-faq .split-table tbody tr:hover {
  background: rgba(69, 240, 224, 0.05);
}

.page-faq .split-table tbody tr:last-child th,
.page-faq .split-table tbody tr:last-child td {
  border-bottom: none;
}

.page-faq .after-table {
  margin: 26px 0 0;
  max-width: 68ch;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.76;
}

.page-faq .after-table a,
.page-faq .qa-item p a,
.page-faq .band-foot a {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(143, 246, 236, 0.4);
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-faq .after-table a:hover,
.page-faq .qa-item p a:hover,
.page-faq .band-foot a:hover,
.page-faq .after-table a:focus-visible,
.page-faq .qa-item p a:focus-visible,
.page-faq .band-foot a:focus-visible {
  color: var(--text);
  border-bottom-color: var(--cyan);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa-stack {
  border-top: 1px solid var(--line);
}

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

.page-faq .qa-item summary {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  padding: 22px 4px;
  color: var(--text);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.55;
  list-style: none;
  cursor: pointer;
  transition: color 0.16s var(--ease);
}

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

.page-faq .qa-item summary::after {
  content: "+";
  flex: none;
  color: var(--cyan);
  font-size: 20px;
  line-height: 1.2;
  transition: color 0.16s var(--ease);
}

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

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

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

.page-faq .qa-item p {
  margin: 0;
  padding: 0 4px 24px;
  max-width: 70ch;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.76;
}

/* ---------- 底部横向问答带 ---------- */
.page-faq .faq-band {
  position: relative;
  overflow: hidden;
  padding-top: 88px;
  background:
    radial-gradient(78% 58% at 86% 6%, rgba(69, 240, 224, 0.08), transparent 66%),
    var(--ink-800);
}

.page-faq .faq-band .container {
  padding-bottom: 24px;
}

.page-faq .band-title {
  margin: 14px 0 14px;
  max-width: 24ch;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.2vw, 32px);
  font-weight: 700;
  line-height: 1.24;
  color: var(--text);
}

.page-faq .band-lede {
  margin: 0;
  max-width: 68ch;
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.76;
}

.page-faq .band-list {
  display: grid;
  gap: 16px;
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .band-item {
  position: relative;
  padding: 24px 20px 22px;
  border: 1px solid var(--line);
  background: var(--ink-900);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .band-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 36px;
  height: 2px;
  background: var(--cyan);
  opacity: 0.85;
}

.page-faq .band-item:hover {
  background: var(--ink-700);
  border-color: var(--cyan-soft);
}

.page-faq .band-q {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
}

.page-faq .band-a {
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.72;
}

.page-faq .band-foot {
  margin: 36px 0 0;
  max-width: 68ch;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.76;
}

.page-faq .band-figure {
  position: relative;
  margin: 56px 0 0;
  width: 100%;
}

.page-faq .band-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 1;
  object-fit: cover;
  opacity: 0.85;
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 34%, #000 68%, transparent 100%);
  mask-image: linear-gradient(180deg, transparent 0%, #000 34%, #000 68%, transparent 100%);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1079px) {
  .page-faq .index-list {
    flex-direction: row;
    gap: 6px;
    padding-bottom: 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .page-faq .index-link {
    flex: none;
    white-space: nowrap;
    padding: 9px 14px;
  }

  .page-faq .index-link::before {
    left: 8px;
    right: 8px;
    top: auto;
    bottom: 0;
    width: auto;
    height: 2px;
  }
}

@media (max-width: 860px) {
  .page-faq .faq-hero {
    padding-top: calc(var(--header-h) + 44px);
    padding-bottom: 58px;
  }

  .page-faq .page-shell {
    padding-top: 56px;
    padding-bottom: 72px;
  }

  .page-faq .faq-section {
    padding-bottom: 48px;
  }

  .page-faq .faq-section + .faq-section {
    padding-top: 48px;
  }

  .page-faq .revisit-panel {
    padding: 28px 22px 22px;
  }
}

@media (max-width: 640px) {
  .page-faq .split-table th,
  .page-faq .split-table td {
    padding: 12px 12px;
    font-size: 14px;
  }

  .page-faq .split-table tbody th {
    white-space: normal;
  }

  .page-faq .step-item {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 16px;
  }

  .page-faq .step-list::before {
    left: 22px;
  }

  .page-faq .step-num {
    font-size: 24px;
  }

  .page-faq .two-step-item {
    grid-template-columns: 34px minmax(0, 1fr);
  }

  .page-faq .two-step-num {
    width: 30px;
    height: 30px;
    font-size: 14px;
  }

  .page-faq .qa-item summary {
    font-size: 16px;
  }

  .page-faq .faq-band {
    padding-top: 60px;
  }
}

@media (min-width: 760px) {
  .page-faq .step-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 46px;
    align-items: center;
  }

  .page-faq .read-pair {
    grid-template-columns: 1fr 1fr;
  }

  .page-faq .locate-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-faq .two-step {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .page-faq .band-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-faq .page-shell {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 60px;
    align-items: start;
  }

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

  .page-faq .index-list {
    border-bottom: none;
    border-left: 1px solid var(--line);
    padding-bottom: 0;
  }

  .page-faq .band-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition: none !important;
  }
}