.page-faq {
  --faq-rail: 252px;
  --faq-line: rgba(138, 152, 166, 0.24);
  --faq-text-soft: rgba(244, 241, 234, 0.76);
  background: var(--c-ink);
  color: var(--c-paper);
  padding-bottom: clamp(2.5rem, 7vw, 5rem);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-cool);
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}

.page-faq .breadcrumbs a {
  color: var(--c-cool);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .breadcrumbs a:hover,
.page-faq .breadcrumbs a:focus-visible {
  color: var(--c-mint);
  border-color: var(--line-mint);
}

.page-faq .breadcrumbs [aria-current="page"] {
  color: var(--c-paper);
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  background:
    radial-gradient(circle at 84% 8%, rgba(46, 242, 196, 0.16), transparent 58%),
    linear-gradient(180deg, var(--c-ink-deep) 0%, var(--c-ink) 100%);
  border-bottom: 1px solid var(--faq-line);
  padding: clamp(2.25rem, 6vw, 4.5rem) 0 clamp(1.75rem, 4vw, 3rem);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  align-items: end;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-size: var(--fs-h1);
  line-height: 1.02;
  letter-spacing: -0.015em;
  margin: 0.5rem 0 0;
  max-width: 18ch;
}

.page-faq .faq-hero__intro {
  margin: 1.25rem 0 0;
  max-width: 60ch;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--faq-text-soft);
}

.page-faq .faq-hero__card {
  background: var(--c-paper);
  color: var(--c-ink);
  border: 1px solid var(--line-ink);
  padding: 1.15rem 1.25rem 1.25rem;
  box-shadow: 10px 10px 0 -1px rgba(46, 242, 196, 0.10), 10px 10px 0 0 rgba(46, 242, 196, 0.22);
}

.page-faq .quick-list {
  list-style: none;
  margin: 0.85rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.page-faq .quick-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.6rem;
  align-items: baseline;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid rgba(10, 20, 32, 0.12);
}

.page-faq .quick-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .quick-list__num {
  font-size: 0.78rem;
  color: var(--c-teal);
  background: var(--c-mint-soft);
  padding: 0.1rem 0.4rem;
}

.page-faq .quick-list a {
  color: var(--c-ink);
  text-decoration: none;
  font-weight: 700;
  line-height: 1.5;
  border-bottom: 2px solid var(--c-mint);
}

.page-faq .quick-list a:hover,
.page-faq .quick-list a:focus-visible {
  border-color: var(--c-ink);
}

.page-faq .quick-list__note {
  margin: 1rem 0 0;
  font-size: 0.86rem;
  line-height: 1.65;
  color: rgba(10, 20, 32, 0.68);
}

/* ---------- 主布局：左索引 右答案 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 3vw, 2.75rem);
  padding-top: clamp(2rem, 5vw, 3.5rem);
}

.page-faq .faq-index {
  order: 2;
  background: rgba(5, 8, 13, 0.74);
  border: 1px solid var(--faq-line);
  padding: 1.1rem 1.25rem 1.25rem;
}

.page-faq .faq-index__title {
  margin: 0 0 0.75rem;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-mint);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.15rem;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.5rem 0.25rem;
  color: var(--faq-text-soft);
  text-decoration: none;
  font-size: 0.92rem;
  line-height: 1.5;
  border-left: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-index__list a .mono {
  font-size: 0.74rem;
  color: var(--c-cool);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--c-paper);
  border-left-color: var(--c-mint);
  background: rgba(46, 242, 196, 0.08);
}

.page-faq .faq-index__list a:hover .mono,
.page-faq .faq-index__list a:focus-visible .mono {
  color: var(--c-mint);
}

.page-faq .faq-body {
  order: 1;
  min-width: 0;
}

/* ---------- 区块 ---------- */
.page-faq .faq-block {
  padding: clamp(1.5rem, 4vw, 2.5rem) 0;
  border-top: 1px solid var(--faq-line);
}

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

.page-faq .faq-block h2 {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  line-height: 1.14;
  margin: 0.6rem 0 1.1rem;
  max-width: 24ch;
}

.page-faq .faq-block h3 {
  font-family: var(--font-body);
  font-weight: 800;
  font-size: var(--fs-h3);
  line-height: 1.35;
  margin: 0 0 0.55rem;
}

.page-faq .prose {
  color: var(--faq-text-soft);
  font-size: var(--fs-body);
  line-height: 1.78;
}

.page-faq .prose + .prose {
  margin-top: 1.1rem;
}

.page-faq .prose a {
  color: var(--c-mint);
  text-decoration: none;
  border-bottom: 1px solid var(--line-mint);
}

.page-faq .prose a:hover,
.page-faq .prose a:focus-visible {
  color: var(--c-paper);
  border-color: var(--c-paper);
}

/* ---------- 步骤 ---------- */
.page-faq .step-list {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-faq .step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  background: var(--c-paper);
  color: var(--c-ink);
  border-left: 4px solid var(--c-mint);
  padding: 1.15rem 1.25rem 1.25rem;
  box-shadow: 8px 8px 0 -1px rgba(244, 241, 234, 0.08), 8px 8px 0 0 rgba(244, 241, 234, 0.18);
}

.page-faq .step__num {
  display: inline-block;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1;
  padding: 0.4rem 0.5rem;
  background: var(--c-ink);
  color: var(--c-mint);
}

.page-faq .step__body p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.72;
  color: rgba(10, 20, 32, 0.76);
}

/* ---------- 图片画框 ---------- */
.page-faq .figure {
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0;
}

.page-faq .figure__media {
  border: 1px solid var(--faq-line);
  background: linear-gradient(140deg, var(--c-teal) 0%, var(--c-ink-deep) 100%);
  overflow: hidden;
}

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

.page-faq .figure__caption {
  margin-top: 0.65rem;
  padding-left: 0.85rem;
  border-left: 3px solid var(--c-mint);
  font-size: 0.86rem;
  line-height: 1.65;
  color: var(--c-cool);
}

/* ---------- 说明卡 ---------- */
.page-faq .calendar-notes {
  margin-top: 1.6rem;
}

.page-faq .note-card {
  border: 1px solid var(--faq-line);
  border-top: 3px solid var(--c-mint);
  background: rgba(18, 59, 58, 0.35);
  padding: 1.15rem 1.2rem 1.25rem;
}

.page-faq .note-card h3 {
  color: var(--c-paper);
}

.page-faq .note-card p {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--faq-text-soft);
}

/* ---------- 订阅提醒 ---------- */
.page-faq .notice-list {
  list-style: none;
  margin: 1.6rem 0 1.5rem;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-faq .notice {
  background: var(--c-paper);
  color: var(--c-ink);
  border: 1px solid var(--line-ink);
  padding: 1.1rem 1.2rem 1.2rem;
}

.page-faq .notice__tag {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  padding: 0.18rem 0.5rem;
  background: var(--c-mint);
  color: var(--c-ink);
}

.page-faq .notice__tag--amber {
  background: var(--c-amber);
}

.page-faq .notice h3 {
  margin-top: 0.7rem;
}

.page-faq .notice p {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.72;
  color: rgba(10, 20, 32, 0.76);
}

/* ---------- 战报数据卡 ---------- */
.page-faq .data-cards {
  margin-top: 1.6rem;
}

.page-faq .data-card {
  border: 1px solid var(--faq-line);
  background: rgba(5, 8, 13, 0.6);
  padding: 1.2rem 1.25rem 1.3rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.page-faq .data-card h3 {
  color: var(--c-paper);
  margin: 0;
}

.page-faq .data-card p {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--faq-text-soft);
}

.page-faq .data-card__meta {
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px solid var(--faq-line);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--c-amber);
}

/* ---------- 迁移对照折叠块 ---------- */
.page-faq .migrate-list {
  margin-top: 1.6rem;
  border: 1px solid var(--faq-line);
}

.page-faq .migrate {
  border-bottom: 1px solid var(--faq-line);
  background: rgba(5, 8, 13, 0.6);
}

.page-faq .migrate:last-child {
  border-bottom: 0;
}

.page-faq .migrate summary,
.page-faq .qa summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.15rem;
  transition: background 0.2s var(--ease);
}

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

.page-faq .migrate summary:hover,
.page-faq .qa summary:hover {
  background: rgba(46, 242, 196, 0.07);
}

.page-faq .migrate summary:focus-visible,
.page-faq .qa summary:focus-visible {
  outline: 2px solid var(--c-mint);
  outline-offset: -2px;
}

.page-faq .migrate__old {
  font-weight: 700;
  font-size: 0.98rem;
  line-height: 1.55;
  color: var(--c-paper);
}

.page-faq .migrate__mark,
.page-faq .qa__mark {
  flex: 0 0 auto;
  position: relative;
  width: 18px;
  height: 18px;
}

.page-faq .migrate__mark::before,
.page-faq .migrate__mark::after,
.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--c-mint);
  transition: transform 0.25s var(--ease), opacity 0.25s var(--ease);
}

.page-faq .migrate__mark::before,
.page-faq .qa__mark::before {
  top: 8px;
  left: 0;
  width: 18px;
  height: 2px;
}

.page-faq .migrate__mark::after,
.page-faq .qa__mark::after {
  top: 0;
  left: 8px;
  width: 2px;
  height: 18px;
}

.page-faq .migrate[open] .migrate__mark::after,
.page-faq .qa[open] .qa__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .migrate__body {
  padding: 0 1.15rem 1.2rem;
  border-top: 1px dashed var(--faq-line);
}

.page-faq .migrate__now {
  margin: 0.9rem 0 0.5rem;
  font-size: 0.96rem;
  line-height: 1.7;
  color: var(--c-mint);
}

.page-faq .migrate__now a {
  color: var(--c-mint);
  border-bottom: 1px solid var(--line-mint);
  text-decoration: none;
}

.page-faq .migrate__body p:last-child {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--faq-text-soft);
}

/* ---------- 筛选条 ---------- */
.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 1.5rem 0 1.1rem;
}

.page-faq .filter-btn {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.5rem 0.85rem;
  background: transparent;
  color: var(--faq-text-soft);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  cursor: pointer;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .filter-btn:hover,
.page-faq .filter-btn:focus-visible {
  color: var(--c-paper);
  border-color: var(--line-mint);
}

.page-faq .filter-btn[aria-pressed="true"] {
  background: var(--c-mint);
  border-color: var(--c-mint);
  color: var(--c-ink);
}

.page-faq .filter-bar__status {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--c-amber);
  margin-left: auto;
}

/* ---------- 常见问题折叠 ---------- */
.page-faq .faq-list {
  border: 1px solid var(--faq-line);
}

.page-faq .qa {
  border-bottom: 1px solid var(--faq-line);
  background: rgba(5, 8, 13, 0.55);
}

.page-faq .qa:last-child {
  border-bottom: 0;
}

.page-faq .qa__q {
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--c-paper);
  padding-right: 0.5rem;
}

.page-faq .qa__body {
  padding: 0 1.15rem 1.2rem;
}

.page-faq .qa__body p {
  margin: 0;
  padding-top: 0.9rem;
  border-top: 1px dashed var(--faq-line);
  font-size: 0.96rem;
  line-height: 1.78;
  color: var(--faq-text-soft);
}

.page-faq .qa[hidden],
.page-faq .migrate[hidden] {
  display: none;
}

/* ---------- 收尾帮助 ---------- */
.page-faq .faq-help {
  margin-top: clamp(2.5rem, 6vw, 4rem);
}

.page-faq .help-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.25rem, 3vw, 2rem);
  background: var(--c-paper);
  color: var(--c-ink);
  border: 1px solid var(--line-ink);
  padding: clamp(1.4rem, 4vw, 2.25rem);
  box-shadow: 10px 10px 0 -1px rgba(46, 242, 196, 0.10), 10px 10px 0 0 rgba(46, 242, 196, 0.20);
}

.page-faq .help-panel h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.4vw, 2.1rem);
  line-height: 1.16;
  margin: 0.6rem 0 0.85rem;
}

.page-faq .help-panel__text p {
  margin: 0;
  max-width: 46ch;
  font-size: 1rem;
  line-height: 1.75;
  color: rgba(10, 20, 32, 0.76);
}

.page-faq .help-panel__contact {
  display: grid;
  gap: 0.6rem;
  align-content: start;
}

.page-faq .help-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.6rem;
  margin: 0;
  font-size: 0.98rem;
}

.page-faq .help-line__key {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--c-ink);
  color: var(--c-mint);
  padding: 0.18rem 0.45rem;
}

.page-faq .help-line a {
  color: var(--c-ink);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid var(--c-mint);
  word-break: break-all;
}

.page-faq .help-line a:hover,
.page-faq .help-line a:focus-visible {
  border-color: var(--c-ink);
}

.page-faq .help-panel__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 0.5rem 0 0;
}

.page-faq .help-panel .btn--ghost {
  color: var(--c-ink);
  border-color: var(--c-ink);
}

.page-faq .help-panel .btn--ghost:hover,
.page-faq .help-panel .btn--ghost:focus-visible {
  background: var(--c-ink);
  color: var(--c-mint);
}

/* ---------- 响应式 ---------- */
@media (max-width: 599px) {
  .page-faq .step {
    grid-template-columns: 1fr;
    gap: 0.7rem;
  }

  .page-faq .filter-bar__status {
    margin-left: 0;
    width: 100%;
  }

  .page-faq .faq-hero h1 {
    font-size: clamp(2rem, 9vw, 2.8rem);
  }
}

@media (min-width: 780px) {
  .page-faq .help-panel {
    grid-template-columns: 1.3fr 1fr;
    align-items: center;
  }

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

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: 1.5fr 1fr;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
  }

  .page-faq .faq-index {
    order: 1;
    position: sticky;
    top: 1.5rem;
  }

  .page-faq .faq-body {
    order: 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .migrate__mark::before,
  .page-faq .migrate__mark::after,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after {
    transition: none;
  }
}