.page-faq {
  padding-block: clamp(18px, 3.5vw, 34px) clamp(40px, 7vw, 78px);
}

.page-faq .faq-hero {
  position: relative;
  padding: clamp(22px, 4.5vw, 46px) 0 clamp(20px, 3.5vw, 30px);
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -18px -6vw auto -6vw;
  height: 84%;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(58% 78% at 10% 0%, rgba(61, 231, 255, 0.16), transparent 70%),
    radial-gradient(52% 70% at 92% 8%, rgba(255, 139, 61, 0.11), transparent 72%);
}
.page-faq .faq-hero > * {
  position: relative;
  z-index: 1;
}
.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(27px, 5vw, 50px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--text);
}
.page-faq .hero-lead {
  margin: 16px 0 0;
  max-width: 66ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
  color: var(--slate);
}
.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-jump a {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 13px;
  color: var(--mist);
  text-decoration: none;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background 0.2s var(--ease);
}
.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  border-color: var(--amber);
  color: var(--text);
  background: rgba(255, 139, 61, 0.08);
}
.page-faq .hero-meta {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--slate);
}
.page-faq .hero-meta .num {
  color: var(--cyan);
  font-size: 14px;
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(22px, 3.5vw, 38px);
  margin-top: clamp(24px, 4vw, 42px);
}

.page-faq .faq-index {
  padding: 18px 16px;
  border-radius: var(--radius-m);
  align-self: start;
}
.page-faq .idx-list {
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
}
.page-faq .idx-list a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  color: var(--text);
  font-size: 14px;
  text-decoration: none;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}
.page-faq .idx-list a:hover,
.page-faq .idx-list a:focus-visible {
  background: var(--ink-700);
  border-left-color: var(--cyan);
}
.page-faq .idx-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}
.page-faq .idx-note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  line-height: 1.6;
  color: var(--slate);
}

.page-faq .faq-sec {
  margin-bottom: clamp(34px, 5vw, 56px);
  scroll-margin-top: calc(var(--header-h) + 22px);
}
.page-faq .faq-sec:last-child {
  margin-bottom: 0;
}
.page-faq #hot,
.page-faq #device,
.page-faq #notice,
.page-faq #record,
.page-faq #security,
.page-faq #support {
  scroll-margin-top: calc(var(--header-h) + 22px);
}
.page-faq .sec-head h2 {
  margin: 0;
  font-size: clamp(21px, 3.2vw, 31px);
  line-height: 1.25;
  letter-spacing: -0.015em;
  font-weight: 800;
  color: var(--text);
}
.page-faq .sec-head p {
  margin: 10px 0 0;
  max-width: 64ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--slate);
}

.page-faq .hot-grid {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}
.page-faq .hot-card {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 16px 18px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: linear-gradient(180deg, rgba(18, 48, 82, 0.92), rgba(10, 29, 54, 0.94));
  text-decoration: none;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.page-faq .hot-card:hover,
.page-faq .hot-card:focus-visible {
  border-color: var(--amber);
}
.page-faq .hot-k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}
.page-faq .hot-card h3 {
  margin: 0;
  font-size: 16.5px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--text);
}
.page-faq .hot-card p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--slate);
}
.page-faq .hot-go {
  margin-top: auto;
  padding-top: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-faq .media-frame {
  margin: 0 0 18px;
  border-radius: var(--radius-m);
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--ink-800);
}
.page-faq .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-faq .split-figure {
  margin-block: clamp(30px, 4.5vw, 46px);
  border-color: var(--line-strong);
}

.page-faq .step-flow {
  display: grid;
  gap: 12px;
  margin-top: 4px;
}
.page-faq .step-card {
  position: relative;
  padding: 14px 16px 16px;
  border: 1px solid var(--line);
  border-top: 2px solid rgba(61, 231, 255, 0.6);
  border-radius: 4px 4px var(--radius-m) var(--radius-m);
  background: var(--ink-800);
  transition: border-color 0.2s var(--ease);
}
.page-faq .step-card:hover,
.page-faq .step-card:focus-within {
  border-color: var(--line-strong);
  border-top-color: var(--amber);
}
.page-faq .step-card summary {
  display: flex;
  align-items: baseline;
  gap: 10px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}
.page-faq .step-card summary::-webkit-details-marker {
  display: none;
}
.page-faq .step-no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}
.page-faq .step-card p {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--slate);
}

.page-faq .qa-group {
  margin-top: 18px;
}
.page-faq .qa {
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--ink-800);
  transition: border-color 0.2s var(--ease);
}
.page-faq .qa + .qa {
  margin-top: 10px;
}
.page-faq .qa:hover {
  border-color: var(--line-strong);
}
.page-faq .qa[open] {
  border-color: var(--line-strong);
}
.page-faq .qa summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
}
.page-faq .qa summary::-webkit-details-marker {
  display: none;
}
.page-faq .qa summary::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
  transition: transform 0.18s var(--ease), color 0.18s var(--ease);
}
.page-faq .qa[open] summary::after {
  content: "−";
  color: var(--amber);
}
.page-faq .qa-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}
.page-faq .qa-body {
  padding: 0 16px 16px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--slate);
}
.page-faq .qa-body p {
  margin: 0;
}
.page-faq .qa-body .link-underline {
  color: var(--mist);
}

.page-faq .version-compare {
  display: grid;
  gap: 12px;
  margin: 18px 0 18px;
}
.page-faq .vc-item {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--ink-800);
}
.page-faq .vc-item--base {
  border-color: var(--line-strong);
  background: linear-gradient(150deg, rgba(61, 231, 255, 0.14), rgba(10, 29, 54, 0.96) 58%);
}
.page-faq .vc-ver {
  margin: 6px 0 8px;
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.6vw, 24px);
  letter-spacing: 0.01em;
  color: var(--text);
}
.page-faq .vc-item p:last-child {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--slate);
}
.page-faq .tick-line {
  display: flex;
  align-items: flex-end;
  gap: 5px;
  height: 42px;
  margin: 0;
  padding: 0 0 2px;
  list-style: none;
  border-bottom: 1px solid var(--line-soft);
}
.page-faq .tick-line li {
  flex: 1;
  border-radius: 2px 2px 0 0;
  background: linear-gradient(180deg, rgba(61, 231, 255, 0.8), rgba(61, 231, 255, 0.06));
  height: 32%;
}
.page-faq .tick-line li:nth-child(2n) {
  height: 56%;
}
.page-faq .tick-line li:nth-child(3n) {
  height: 78%;
  background: linear-gradient(180deg, rgba(159, 234, 245, 0.85), rgba(159, 234, 245, 0.08));
}
.page-faq .tick-line li:nth-child(5n) {
  height: 92%;
  background: linear-gradient(180deg, rgba(255, 139, 61, 0.8), rgba(255, 139, 61, 0.06));
}
.page-faq .tick-cap {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}
.page-faq .tick-cap .link-underline {
  color: var(--mist);
}

.page-faq .guard-grid {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}
.page-faq .guard {
  padding: 14px 16px;
  border-left: 3px solid var(--amber);
  border-radius: 4px var(--radius-m) var(--radius-m) 4px;
  background: var(--ink-800);
}
.page-faq .guard h3 {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}
.page-faq .guard p {
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--slate);
}
.page-faq .guard-note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}
.page-faq .guard-note .link-underline {
  color: var(--mist);
}

.page-faq .support-panel {
  display: grid;
  gap: 22px;
  margin-top: 18px;
  padding: clamp(20px, 3.4vw, 32px);
  border-radius: var(--radius-l);
  background: var(--paper);
  color: var(--ink-text);
}
.page-faq .sup-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #6a5a3e;
}
.page-faq .sup-list {
  margin: 0;
  padding: 0;
}
.page-faq .sup-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  padding: 10px 0;
  border-bottom: 1px solid var(--paper-line);
}
.page-faq .sup-row:last-child {
  border-bottom: 0;
}
.page-faq .sup-label {
  flex: none;
  min-width: 78px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: #6a5a3e;
}
.page-faq .sup-value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  word-break: break-word;
  color: var(--ink-text);
}
.page-faq .sup-note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: #4a3d28;
}
.page-faq .sup-side {
  padding-top: 18px;
  border-top: 1px solid var(--paper-line);
}
.page-faq .sup-side-title {
  margin: 0 0 10px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-text);
}
.page-faq .sup-tips {
  margin: 0 0 18px;
  padding-left: 18px;
  font-size: 13.5px;
  line-height: 1.9;
  color: #4a3d28;
}
.page-faq .sup-side .btn {
  width: 100%;
}

@media (min-width: 640px) {
  .page-faq .hot-grid,
  .page-faq .version-compare,
  .page-faq .guard-grid,
  .page-faq .step-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .support-panel {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 32px;
  }
  .page-faq .sup-side {
    padding-top: 0;
    padding-left: 28px;
    border-top: 0;
    border-left: 1px solid var(--paper-line);
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    align-items: start;
  }
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }
  .page-faq .guard-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1140px) {
  .page-faq .step-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-faq .hot-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-faq .hot-card:nth-child(2) {
    transform: translateY(10px);
  }
  .page-faq .hot-card:nth-child(4) {
    transform: translateY(10px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .hot-card,
  .page-faq .qa,
  .page-faq .step-card,
  .page-faq .faq-jump a,
  .page-faq .idx-list a {
    transition: none;
  }
  .page-faq .hot-card:nth-child(2),
  .page-faq .hot-card:nth-child(4) {
    transform: none;
  }
}
<<<END>>>