.page-faq {
  --faq-cut: 20px;
  --faq-gap: clamp(28px, 5vw, 64px);
  display: block;
  font-family: var(--font-body);
  color: var(--ice);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(36px, 6vw, 82px) 0 clamp(30px, 5vw, 54px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(880px 440px at 84% -12%, rgba(138, 92, 255, 0.30), transparent 62%),
    radial-gradient(660px 360px at 4% 6%, rgba(43, 232, 213, 0.16), transparent 66%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(154, 168, 204, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(154, 168, 204, 0.07) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.85), transparent 76%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.85), transparent 76%);
}

.page-faq .faq-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 46px);
  align-items: end;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(34px, 7vw, 62px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.012em;
  color: var(--ice);
}

.page-faq .faq-hero .lede {
  margin: 18px 0 0;
  max-width: 660px;
  color: var(--mist);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero-panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 14px;
  padding: 20px;
  border: 1px solid var(--line-cyan);
  background: var(--panel);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
}

.page-faq .faq-hero-panel .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-left: 2px solid rgba(43, 232, 213, 0.4);
  padding-left: 10px;
}

.page-faq .faq-hero-panel .stat-value {
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-hero-panel .stat-label {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--mist);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 46px);
  padding-block: clamp(34px, 5vw, 60px) clamp(52px, 8vw, 100px);
}

/* ---------- 侧栏目录 ---------- */
.page-faq .faq-toc {
  padding: 16px;
  border: 1px solid var(--line);
  background: var(--panel-deep);
}

.page-faq .faq-toc-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-faq .faq-toc-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-toc-list a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  padding: 9px 10px;
  border-left: 2px solid transparent;
  color: var(--mist);
  font-size: 13.5px;
  line-height: 1.45;
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-toc-list a:hover,
.page-faq .faq-toc-list a:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(43, 232, 213, 0.07);
}

.page-faq .faq-toc-index {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--magenta);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 112px;
  padding-top: clamp(30px, 4.5vw, 48px);
}

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

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-group-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--magenta);
  flex: none;
}

.page-faq .faq-group h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 3vw, 27px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--ice);
}

.page-faq .faq-group-lede {
  max-width: 640px;
  margin: 0 0 22px;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.82;
}

/* ---------- 上手三步 ---------- */
.page-faq .faq-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps > li {
  position: relative;
  padding: 18px 16px 16px;
  border: 1px solid var(--line);
  background: linear-gradient(158deg, rgba(138, 92, 255, 0.18), rgba(19, 26, 58, 0.92) 58%);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.page-faq .faq-step-num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--magenta);
}

.page-faq .faq-steps h3 {
  margin: 9px 0 8px;
  font-size: 17.5px;
  font-weight: 800;
  line-height: 1.35;
  color: var(--ice);
}

.page-faq .faq-steps p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-steps .faq-step-out {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--line-cyan);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--cyan);
}

/* ---------- 档位对照 ---------- */
.page-faq .tier-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: 0 0 22px;
}

.page-faq .tier-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--cyan);
  background: var(--panel);
}

.page-faq .tier-card--light { border-top-color: var(--lime); }
.page-faq .tier-card--standard { border-top-color: var(--cyan); }
.page-faq .tier-card--advanced { border-top-color: var(--violet); }
.page-faq .tier-card--high { border-top-color: var(--magenta); }
.page-faq .tier-card--flagship { border-top-color: var(--orange); }

.page-faq .tier-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.page-faq .tier-name {
  font-size: 17px;
  font-weight: 800;
  color: var(--ice);
}

.page-faq .tier-size {
  flex: none;
  padding: 3px 8px;
  border: 1px solid var(--line-cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.page-faq .tier-specs {
  display: grid;
  gap: 7px;
  margin: 0;
}

.page-faq .tier-specs > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 7px;
  border-bottom: 1px dashed var(--line-soft);
}

.page-faq .tier-specs > div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .tier-specs dt {
  font-size: 13px;
  color: var(--mist);
}

.page-faq .tier-specs dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--ice);
  text-align: right;
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 22px 0 0;
}

.page-faq .faq-figure .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 问答折叠条目 ---------- */
.page-faq .faq-item {
  margin-bottom: 10px;
  border: 1px solid var(--line);
  border-left: 3px solid rgba(43, 232, 213, 0.42);
  background: var(--panel);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-item[open] {
  border-left-color: var(--cyan);
  background: rgba(19, 26, 58, 0.96);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.58;
  color: var(--ice);
  transition: color 0.2s 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,
.page-faq .faq-item > summary:focus-visible {
  color: var(--cyan);
}

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

.page-faq .faq-mark {
  flex: none;
  position: relative;
  width: 20px;
  height: 20px;
  margin-top: 3px;
  border: 1px solid var(--line-cyan);
}

.page-faq .faq-mark::before,
.page-faq .faq-mark::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  background: var(--cyan);
}

.page-faq .faq-mark::before { width: 10px; height: 2px; }
.page-faq .faq-mark::after {
  width: 2px;
  height: 10px;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

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

.page-faq .faq-answer {
  margin: 0 14px 14px;
  padding: 16px 16px 18px;
  background: var(--mint);
  color: #0B1026;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.page-faq .faq-answer p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.8;
  color: #16203f;
}

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

.page-faq .faq-answer strong {
  font-weight: 800;
  color: #0B1026;
}

.page-faq .faq-answer a {
  color: #0a6b64;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-answer p.faq-data {
  margin-top: 14px;
  padding: 10px 12px;
  border-left: 3px solid var(--cyan);
  background: var(--void);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0.01em;
  color: var(--cyan);
  word-break: break-word;
  font-variant-numeric: tabular-nums;
}

/* ---------- 内存区间读法 ---------- */
.page-faq .mem-list {
  display: grid;
  gap: 10px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.page-faq .mem-list > li {
  display: grid;
  gap: 8px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--violet);
  background: var(--panel);
}

.page-faq .mem-key {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--violet);
}

.page-faq .mem-val {
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 求助区 ---------- */
.page-faq .help-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 24px;
}

.page-faq .help-card {
  padding: 18px 16px;
}

.page-faq .help-card-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-faq .cut-card--mint .help-card-title {
  color: #0a6b64;
}

.page-faq .help-card-body {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
}

.page-faq .help-card-body .mono {
  font-family: var(--font-mono);
  font-size: 13.5px;
  white-space: nowrap;
}

.page-faq .help-sub {
  margin: 0 0 12px;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--ice);
}

.page-faq .ask-list {
  display: grid;
  gap: 8px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.page-faq .ask-list > li {
  position: relative;
  padding: 10px 12px 10px 30px;
  border: 1px dashed var(--line);
  background: rgba(19, 26, 58, 0.7);
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .ask-list > li::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 18px;
  width: 8px;
  height: 8px;
  background: var(--lime);
  transform: rotate(45deg);
}

.page-faq .help-tail {
  margin: 0 0 20px;
  max-width: 640px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .tier-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.28fr) minmax(268px, 0.72fr);
  }

  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 218px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 104px;
    max-height: calc(100vh - 130px);
    overflow-y: auto;
  }

  .page-faq .faq-toc-list {
    grid-template-columns: 1fr;
  }

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

@media (min-width: 1160px) {
  .page-faq .tier-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-faq .faq-group-lede {
    font-size: 15.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-toc-list a,
  .page-faq .faq-item,
  .page-faq .faq-item > summary,
  .page-faq .faq-mark::after {
    transition: none;
  }
}