.page-faq {
  --faq-card: #FFFFFF;
  --faq-aqua-soft: rgba(47, 227, 193, 0.16);
  --faq-coral-soft: rgba(255, 107, 74, 0.14);
  background: var(--c-mist);
  color: var(--c-ink);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-faq p {
  margin: 0 0 12px;
}

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

/* ---------- hero ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(158deg, #061B33 0%, #0B2F4F 62%, #0A3350 100%);
  color: var(--c-mist);
  padding: clamp(20px, 5vw, 40px) 0 clamp(46px, 8vw, 82px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  right: -20vw;
  top: -24vh;
  width: 62vw;
  height: 92vh;
  background: linear-gradient(140deg, rgba(47, 227, 193, 0.28), rgba(47, 227, 193, 0) 62%);
  transform: rotate(-12deg);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: -14vw;
  bottom: -22vh;
  width: 56vw;
  height: 52vh;
  background: linear-gradient(320deg, rgba(255, 107, 74, 0.3), rgba(255, 107, 74, 0) 68%);
  transform: rotate(9deg);
  pointer-events: none;
}

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

.page-faq .faq-hero .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: rgba(245, 250, 252, 0.62);
  margin-bottom: clamp(22px, 4vw, 38px);
}

.page-faq .faq-hero .breadcrumb a {
  color: var(--c-aqua);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease);
}

.page-faq .faq-hero .breadcrumb a:hover,
.page-faq .faq-hero .breadcrumb a:focus-visible {
  border-bottom-color: var(--c-aqua);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(26px, 4vw, 42px);
}

.page-faq .kicker {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--c-aqua);
  margin: 0 0 14px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 6.6vw, 58px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--c-white);
  margin: 0 0 clamp(16px, 2.6vw, 24px);
}

.page-faq .faq-hero .lede {
  max-width: 60ch;
  font-size: clamp(15px, 3.5vw, 18px);
  line-height: 1.85;
  color: rgba(245, 250, 252, 0.84);
  margin: 0 0 clamp(22px, 4vw, 32px);
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-hero .btn--ghost {
  border-color: rgba(245, 250, 252, 0.42);
  color: var(--c-mist);
}

.page-faq .faq-hero-side {
  border-top: 1px solid var(--line-dark);
  padding-top: 18px;
}

.page-faq .side-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(245, 250, 252, 0.52);
  margin: 0 0 8px;
}

.page-faq .faq-jump {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-jump a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 2px;
  font-size: 0.94rem;
  color: var(--c-mist);
  text-decoration: none;
  border-bottom: 1px solid var(--line-darker);
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  color: var(--c-aqua);
  padding-left: 8px;
}

.page-faq .jump-num {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--c-coral-soft);
}

/* ---------- switch band ---------- */
.page-faq .faq-switch {
  position: relative;
  z-index: 2;
  margin-top: -30px;
  padding-bottom: clamp(8px, 2vw, 16px);
}

.page-faq .switch-card {
  background: var(--faq-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-2);
  padding: clamp(16px, 3vw, 26px);
}

.page-faq .switch-tabbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.page-faq .switch-tabbar .tab {
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--c-line);
  background: var(--c-mist);
  color: var(--c-ink);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .switch-tabbar .tab:hover {
  border-color: var(--c-line-strong);
}

.page-faq .switch-tabbar .tab.is-active,
.page-faq .switch-tabbar .tab[aria-selected="true"] {
  background: var(--c-deep);
  border-color: var(--c-deep);
  color: var(--c-mist);
  box-shadow: inset 0 -2px 0 var(--c-aqua);
}

.page-faq .tab-panel {
  font-size: 0.95rem;
  line-height: 1.82;
  color: var(--c-ink);
}

.page-faq .tab-panel[hidden] {
  display: none;
}

.page-faq .switch-links {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .switch-links a {
  display: block;
  padding: 12px 14px;
  background: var(--c-mist);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-aqua);
  border-radius: var(--radius-s);
  color: var(--c-graphite);
  font-size: 0.92rem;
  text-decoration: none;
  transition: border-left-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .switch-links a:hover,
.page-faq .switch-links a:focus-visible {
  border-left-color: var(--c-coral);
  transform: translateX(2px);
}

/* ---------- shared section furniture ---------- */
.page-faq .faq-flow,
.page-faq .faq-network,
.page-faq .faq-old,
.page-faq .faq-feedback {
  padding-block: clamp(38px, 7vw, 76px);
}

.page-faq .faq-reasons {
  padding-block: clamp(38px, 7vw, 76px);
  background: var(--c-shallow);
}

.page-faq .faq-ios {
  padding-block: clamp(42px, 8vw, 86px);
  background: linear-gradient(160deg, #061B33 0%, #0B2F4F 100%);
  color: rgba(245, 250, 252, 0.86);
}

.page-faq .faq-label {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-coral);
  margin: 0 0 12px;
}

.page-faq .faq-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--c-line), transparent);
}

.page-faq .faq-label--light {
  color: var(--c-aqua);
}

.page-faq .faq-label--light::after {
  background: linear-gradient(90deg, rgba(185, 203, 216, 0.4), transparent);
}

.page-faq h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 5vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--c-deep);
  margin: 0 0 clamp(12px, 2vw, 18px);
}

.page-faq h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16px, 3.5vw, 19px);
  line-height: 1.45;
  color: var(--c-deep);
  margin: 0 0 6px;
}

.page-faq .faq-intro {
  max-width: 62ch;
  font-size: clamp(15px, 3.4vw, 17px);
  line-height: 1.85;
  color: var(--c-ink);
  margin: 0 0 clamp(24px, 4vw, 34px);
}

.page-faq .faq-ios h2 {
  color: var(--c-white);
}

.page-faq .faq-ios .faq-intro {
  color: rgba(245, 250, 252, 0.8);
}

/* ---------- flow ---------- */
.page-faq .flow {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

.page-faq .flow-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .flow-step {
  position: relative;
  padding: 0 0 clamp(20px, 3vw, 28px) 56px;
}

.page-faq .flow-step:last-child {
  padding-bottom: 0;
}

.page-faq .flow-step::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 42px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, rgba(47, 227, 193, 0.9), rgba(47, 227, 193, 0.06));
}

.page-faq .flow-step:last-child::before {
  content: none;
}

.page-faq .flow-num {
  position: absolute;
  left: 0;
  top: 0;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--c-aqua);
  color: var(--c-deep);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  font-weight: 700;
  box-shadow: 0 0 0 4px var(--faq-aqua-soft);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .flow-step:hover .flow-num,
.page-faq .flow-step:focus-within .flow-num {
  background: var(--c-coral);
  color: var(--c-white);
  box-shadow: 0 0 0 5px var(--faq-coral-soft);
}

.page-faq .flow-body p {
  font-size: 0.95rem;
  line-height: 1.82;
  color: var(--c-ink);
}

.page-faq .flow-figure,
.page-faq .ios-figure {
  margin: 0;
}

.page-faq .media-frame {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  background: var(--c-tide);
  box-shadow: var(--shadow-2);
}

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

.page-faq .flow-figure figcaption,
.page-faq .ios-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-serif);
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--c-graphite);
}

.page-faq .ios-figure figcaption {
  color: rgba(245, 250, 252, 0.66);
}

/* ---------- reasons ---------- */
.page-faq .reason-grid {
  display: grid;
  gap: 10px;
}

.page-faq .reason {
  background: var(--faq-card);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-coral);
  border-radius: var(--radius-s);
  box-shadow: var(--shadow-1);
  overflow: hidden;
}

.page-faq .reason summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  font-size: 1rem;
  color: var(--c-deep);
}

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

.page-faq .reason summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  line-height: 1;
  color: var(--c-coral);
}

.page-faq .reason[open] summary::after {
  content: "−";
}

.page-faq .reason summary:focus-visible {
  outline: 2px solid var(--c-aqua);
  outline-offset: -2px;
}

.page-faq .reason-body {
  padding: 0 16px 16px;
  font-size: 0.94rem;
  line-height: 1.8;
}

.page-faq .reason-do {
  background: var(--c-shallow);
  border-radius: var(--radius-s);
  padding: 10px 12px;
  font-size: 0.9rem;
  color: var(--c-graphite);
}

/* ---------- network ---------- */
.page-faq .net-grid {
  display: grid;
  gap: 12px;
}

.page-faq .net-card {
  position: relative;
  padding: 46px clamp(16px, 3vw, 22px) clamp(16px, 3vw, 22px);
  background: var(--faq-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-1);
}

.page-faq .net-num {
  position: absolute;
  top: 15px;
  left: clamp(16px, 3vw, 22px);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--c-coral);
}

.page-faq .net-card h3 {
  margin-bottom: 8px;
}

.page-faq .net-card p {
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--c-ink);
}

/* ---------- ios ---------- */
.page-faq .ios-grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

.page-faq .ios-index {
  display: grid;
  gap: 16px;
  margin: 22px 0 26px;
}

.page-faq .ios-group h3 {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-aqua);
  margin: 0 0 8px;
}

.page-faq .ios-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-faq .ios-tag {
  font-size: 0.82rem;
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid rgba(185, 203, 216, 0.34);
  background: rgba(47, 227, 193, 0.08);
  color: rgba(245, 250, 252, 0.9);
}

/* ---------- old ---------- */
.page-faq .old-grid {
  display: grid;
  gap: clamp(18px, 3vw, 30px);
}

.page-faq .old-card {
  padding: clamp(20px, 3vw, 30px);
  border-radius: var(--radius-m);
  background: linear-gradient(160deg, #0B2F4F 0%, #061B33 100%);
  color: rgba(245, 250, 252, 0.86);
  box-shadow: var(--shadow-2);
}

.page-faq .old-card p {
  font-size: 0.95rem;
  line-height: 1.85;
  margin-bottom: 18px;
}

.page-faq .old-card .btn--ghost {
  border-color: rgba(245, 250, 252, 0.42);
  color: var(--c-mist);
}

.page-faq .ver-badge {
  display: inline-block;
  margin-bottom: 14px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--c-coral);
  color: var(--c-white);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
}

.page-faq .old-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: oldstep;
}

.page-faq .old-steps li {
  position: relative;
  padding-left: 38px;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--c-ink);
}

.page-faq .old-steps li::before {
  counter-increment: oldstep;
  content: counter(oldstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--c-coral);
  border-bottom: 2px solid var(--faq-aqua-soft);
  padding-bottom: 1px;
}

/* ---------- feedback ---------- */
.page-faq .feedback-grid {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-faq .need-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .need-list li {
  display: flex;
  gap: 14px;
  padding: 15px 16px;
  background: var(--faq-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-s);
  box-shadow: var(--shadow-1);
}

.page-faq .need-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--c-coral);
  line-height: 1.6;
}

.page-faq .need-list p {
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--c-ink);
}

.page-faq .feedback-note {
  padding: clamp(18px, 3vw, 26px);
  background: var(--c-shallow);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-aqua);
  border-radius: var(--radius-m);
}

.page-faq .feedback-note p {
  font-size: 0.94rem;
  line-height: 1.82;
  color: var(--c-graphite);
  margin-bottom: 12px;
}

.page-faq .feedback-note .btn {
  margin-top: 6px;
}

/* ---------- responsive ---------- */
@media (min-width: 720px) {
  .page-faq .switch-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .reason-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-faq .net-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-switch {
    margin-top: -52px;
  }

  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.8fr);
    align-items: end;
  }
}

@media (min-width: 900px) {
  .page-faq .flow {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

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

  .page-faq .ios-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    align-items: center;
  }

  .page-faq .old-grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    align-items: start;
  }

  .page-faq .feedback-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-faq .ios-index {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump a,
  .page-faq .switch-links a,
  .page-faq .flow-num,
  .page-faq .switch-tabbar .tab {
    transition: none;
  }

  .page-faq .switch-links a:hover,
  .page-faq .switch-links a:focus-visible {
    transform: none;
  }
}