.page-faq {
  --faq-space: clamp(56px, 9vw, 100px);
  --faq-sticky: #123639;
  position: relative;
  isolation: isolate;
  overflow-x: clip;
  color: var(--paper);
  background:
    radial-gradient(880px 520px at 88% -6%, rgba(232, 114, 44, .20), transparent 62%),
    radial-gradient(720px 480px at -8% 12%, rgba(127, 212, 232, .13), transparent 62%),
    linear-gradient(180deg, var(--ink-deep) 0%, var(--ink) 36%, var(--ink-deep) 100%);
}

.page-faq a {
  color: var(--ice);
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible,
.page-faq button:focus-visible {
  outline: 2px solid var(--ice);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-h) + clamp(24px, 4vw, 46px)) 0 clamp(46px, 7vw, 82px);
  isolation: isolate;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(44, 79, 82, .38) 1px, transparent 1px),
    linear-gradient(90deg, rgba(44, 79, 82, .38) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .88), transparent 90%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .88), transparent 90%);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 18px;
  max-width: 1000px;
}

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

.page-faq .breadcrumb__sep {
  color: var(--line);
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6.2vw, 68px);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--paper);
  overflow-wrap: break-word;
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-index {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(20, 56, 59, .58);
  color: var(--paper);
  font-size: 13.5px;
  text-decoration: none;
  transition: border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease);
}

.page-faq .faq-index a:hover,
.page-faq .faq-index a:focus-visible {
  border-color: var(--ice);
  color: var(--ice);
  background: rgba(127, 212, 232, .09);
}

.page-faq .faq-index__n {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--orange);
}

/* ---------- 章节骨架 ---------- */

.page-faq .faq-section {
  position: relative;
  padding: var(--faq-space) 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-section--help {
  padding-bottom: clamp(72px, 10vw, 128px);
}

.page-faq .faq-head {
  display: grid;
  gap: 12px;
  max-width: 760px;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-faq .faq-head__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-faq .faq-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-head p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-head p + p {
  margin-top: .6em;
}

/* ---------- 图片 ---------- */

.page-faq .faq-figure {
  margin: clamp(32px, 5vw, 52px) 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
}

.page-faq .faq-figure .figure__caption {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 三步自查 ---------- */

.page-faq .steps {
  display: grid;
  gap: 16px;
}

.page-faq .step {
  position: relative;
  padding: 28px 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(20, 56, 59, .74), rgba(11, 36, 38, .52));
  box-shadow: 0 22px 46px -34px rgba(0, 0, 0, .95);
  transition: border-color .24s var(--ease), transform .24s var(--ease);
}

.page-faq .step:hover {
  border-color: rgba(127, 212, 232, .45);
  transform: translateY(-2px);
}

.page-faq .step__num {
  display: block;
  margin-bottom: 15px;
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--orange);
}

.page-faq .step h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper);
}

.page-faq .step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .step__hint {
  margin-top: 16px !important;
  padding-top: 13px;
  border-top: 1px solid var(--line);
  font-size: 13px !important;
  color: var(--ice) !important;
}

/* ---------- 对照表 ---------- */

.page-faq .table-scroll {
  margin-top: clamp(28px, 4vw, 40px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(11, 36, 38, .6);
}

.page-faq .faq-table {
  width: 100%;
  min-width: 780px;
  border-collapse: collapse;
  font-size: 14px;
}

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

.page-faq .faq-table tbody tr:last-child th,
.page-faq .faq-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-faq .faq-table thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .08em;
  color: var(--muted);
  background: rgba(20, 56, 59, .9);
  white-space: nowrap;
}

.page-faq .faq-table tbody th {
  font-weight: 700;
  color: var(--paper);
  background: rgba(20, 56, 59, .58);
}

.page-faq .faq-table tbody td {
  color: var(--muted);
  line-height: 1.72;
}

.page-faq .faq-table .num {
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--paper);
  white-space: nowrap;
}

.page-faq .faq-table thead th:first-child,
.page-faq .faq-table tbody th:first-child {
  position: sticky;
  left: 0;
  z-index: 2;
  background: var(--faq-sticky);
  box-shadow: 1px 0 0 var(--line);
}

.page-faq .faq-table .tag {
  white-space: nowrap;
}

.page-faq .annotation {
  display: block;
  margin-top: 20px;
  padding: 14px 18px;
  border-radius: var(--radius-s);
  font-size: 13px;
  line-height: 1.8;
}

/* ---------- 分段切换器 ---------- */

.page-faq .faq-switcher {
  margin-bottom: clamp(34px, 5vw, 48px);
}

.page-faq .faq-switcher .switcher__panel {
  padding-top: 20px;
}

.page-faq .faq-switcher__lead {
  display: block;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--ice);
}

.page-faq .faq-switcher .switcher__panel p {
  margin: 0;
  max-width: 72ch;
  font-size: 15px;
  line-height: 1.86;
  color: var(--muted);
}

/* ---------- 折叠问答 ---------- */

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

.page-faq .faq-q {
  display: block;
  padding: 0 0 0 18px;
  border: 0;
  border-bottom: 1px solid var(--line);
  box-shadow: inset 2px 0 0 transparent;
  background: transparent;
  transition: box-shadow .24s var(--ease), background .24s var(--ease);
}

.page-faq .faq-q[open] {
  box-shadow: inset 2px 0 0 var(--ice);
  background: linear-gradient(90deg, rgba(127, 212, 232, .07), transparent 62%);
}

.page-faq .faq-q > summary {
  position: relative;
  display: block;
  padding: 22px 44px 22px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 700;
  line-height: 1.55;
  color: var(--paper);
  transition: color .2s var(--ease);
}

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

.page-faq .faq-q > summary:hover {
  color: var(--ice);
}

.page-faq .faq-q[open] > summary {
  color: var(--ice);
}

.page-faq .faq-q > summary::before,
.page-faq .faq-q > summary::after {
  content: "";
  position: absolute;
  top: 50%;
  background: var(--ice);
  transition: transform .24s var(--ease), opacity .24s var(--ease);
}

.page-faq .faq-q > summary::before {
  right: 6px;
  width: 14px;
  height: 1.5px;
  margin-top: -0.75px;
}

.page-faq .faq-q > summary::after {
  right: 12.25px;
  width: 1.5px;
  height: 14px;
  margin-top: -7px;
}

.page-faq .faq-q[open] > summary::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-q__body {
  max-width: 76ch;
  padding: 0 44px 26px 0;
  font-size: 14.8px;
  line-height: 1.9;
  color: var(--muted);
}

.page-faq .faq-q__body p {
  margin: 0 0 .85em;
}

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

/* ---------- 礼包码面板 ---------- */

.page-faq .faq-gift {
  position: relative;
  margin-bottom: 26px;
  padding: 30px 24px 28px;
  border-left: 3px solid var(--amber);
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(255, 176, 32, .17), rgba(20, 56, 59, .78) 58%);
}

.page-faq .faq-gift__kicker {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-faq .faq-gift__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(21px, 2.8vw, 28px);
  font-weight: 900;
  line-height: 1.3;
  color: var(--paper);
}

.page-faq .faq-gift__text {
  margin: 0 0 20px;
  max-width: 70ch;
  font-size: 15px;
  line-height: 1.86;
  color: var(--muted);
}

.page-faq .faq-gift__list {
  display: grid;
  gap: 11px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-gift__list li {
  display: grid;
  grid-template-columns: 8px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--paper);
}

.page-faq .faq-gift__dot {
  display: block;
  width: 8px;
  height: 8px;
  margin-top: 9px;
  border-radius: 50%;
  background: var(--amber);
}

.page-faq .faq-tip {
  margin: 0 0 32px;
  padding: 14px 18px;
  border: 1px dashed var(--line);
  border-radius: var(--radius-s);
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
  background: rgba(11, 36, 38, .55);
}

/* ---------- 人工协助 ---------- */

.page-faq .faq-help {
  display: grid;
  gap: 28px;
}

.page-faq .faq-help__list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-help__list li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: rgba(20, 56, 59, .55);
  transition: border-color .24s var(--ease), background .24s var(--ease);
}

.page-faq .faq-help__list li:hover {
  border-color: rgba(127, 212, 232, .4);
  background: rgba(20, 56, 59, .78);
}

.page-faq .faq-help__n {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--orange);
}

.page-faq .faq-help__list strong {
  display: block;
  margin-bottom: 5px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-help__list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-help__aside {
  align-self: start;
  padding: 26px 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(232, 114, 44, .16), rgba(20, 56, 59, .72) 64%);
}

.page-faq .faq-help__aside-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-faq .faq-help__aside-text {
  margin: 0 0 20px;
  font-size: 14.5px;
  line-height: 1.86;
  color: var(--muted);
}

.page-faq .faq-help__aside-note {
  margin: 18px 0 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-index {
    gap: 12px;
  }

  .page-faq .faq-gift {
    padding: 34px 32px 32px;
  }

  .page-faq .faq-q {
    padding-left: 24px;
  }

  .page-faq .faq-q__body {
    padding-right: 64px;
  }
}

@media (min-width: 860px) {
  .page-faq .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-faq .step {
    padding: 30px 24px 26px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-help {
    grid-template-columns: minmax(0, 7fr) minmax(0, 3fr);
    gap: 40px;
  }

  .page-faq .faq-help__aside {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .step,
  .page-faq .faq-index a,
  .page-faq .faq-q,
  .page-faq .faq-q > summary,
  .page-faq .faq-q > summary::before,
  .page-faq .faq-q > summary::after {
    transition: none;
  }

  .page-faq .step:hover {
    transform: none;
  }
}