.page-faq {
  --faq-grid-line: rgba(0, 212, 255, 0.06);
  --faq-muted-2: #7A8296;
  --faq-card: rgba(18, 26, 43, 0.72);
  scroll-behavior: smooth;
}

.page-faq__hero {
  position: relative;
  overflow: hidden;
  background: var(--bg-field);
  padding: 36px 0 72px;
}

.page-faq__grid-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--faq-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--faq-grid-line) 1px, transparent 1px);
  background-size: 26px 26px;
}

.page-faq__hero-sweep {
  position: absolute;
  top: 0;
  right: 0;
  width: 56%;
  height: 100%;
  pointer-events: none;
  background: linear-gradient(120deg, rgba(0, 212, 255, 0.18), rgba(18, 26, 43, 0.08) 55%, rgba(255, 59, 92, 0.08));
  clip-path: polygon(38% 0, 100% 0, 100% 100%, 0 100%);
}

.page-faq__hero-edge {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 72%;
  height: 6px;
  pointer-events: none;
  background: var(--red);
  clip-path: polygon(0 0, 100% 0, calc(100% - 36px) 100%, 0 100%);
}

.page-faq__hero-container {
  position: relative;
  z-index: 2;
}

.page-faq__breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 28px;
}

.page-faq__breadcrumb a {
  color: var(--blue);
  text-decoration: none;
}

.page-faq__breadcrumb a:hover {
  color: var(--green);
}

.page-faq__crumb-sep {
  color: var(--border);
}

.page-faq__hero-layout {
  display: grid;
  gap: 36px;
}

.page-faq__hero-kicker {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--green);
  text-transform: uppercase;
  margin: 0 0 12px;
}

.page-faq__hero-copy h1 {
  font-family: var(--font-display);
  font-size: clamp(30px, 5vw, 52px);
  line-height: 1.08;
  color: var(--paper);
  margin: 0 0 18px;
}

.page-faq__hero-lead {
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 720px;
  margin: 0 0 28px;
}

.page-faq__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-faq__hero-aside {
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  gap: 22px;
}

.page-faq__hero-sticker {
  width: 108px;
  height: 108px;
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 900;
  color: var(--bg);
  background: var(--green);
  transform: rotate(6deg);
  box-shadow: 12px 12px 0 rgba(0, 212, 255, 0.28);
}

.page-faq__hero-note {
  padding-bottom: 6px;
}

.page-faq__hero-note-line {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}

.page-faq__hero-note-bold {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 900;
  color: var(--blue);
  margin: 2px 0 12px;
}

.page-faq__search-section {
  padding: 44px 0 0;
}

.page-faq__search-heading {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 900;
  color: var(--paper);
  margin: 0 0 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-faq__search-heading::before {
  content: "";
  width: 6px;
  height: 24px;
  background: var(--blue);
}

.page-faq__search-panel {
  border: 1px solid var(--border);
  background: var(--faq-card);
  padding: 24px 20px 20px;
}

.page-faq__search-label {
  display: block;
  font-size: 14px;
  font-weight: 700;
  color: var(--paper);
  margin-bottom: 12px;
}

.page-faq__search-row {
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 2px solid var(--blue);
  padding-bottom: 12px;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-faq__search-row:focus-within {
  border-color: var(--green);
  box-shadow: 0 3px 0 -1px var(--green);
}

.page-faq__search-icon {
  color: var(--blue);
  flex: 0 0 auto;
}

.page-faq__search-input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: 0;
  outline: none;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
}

.page-faq__search-input::placeholder {
  color: var(--faq-muted-2);
  font-weight: 400;
}

.page-faq__search-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
}

.page-faq__search-tags-label {
  font-size: 13px;
  color: var(--muted);
}

.page-faq__support {
  padding: 56px 0 0;
}

.page-faq__support-inner {
  position: relative;
}

.page-faq__filter {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
  left: -9999px;
}

.page-faq__index {
  background: var(--faq-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--blue);
  padding: 20px;
  margin-bottom: 28px;
}

.page-faq__index h2 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 900;
  color: var(--paper);
  margin: 0 0 6px;
}

.page-faq__index-tip {
  font-size: 13px;
  color: var(--muted);
  margin: 0 0 18px;
}

.page-faq__index-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
}

.page-faq__index-item {
  margin-bottom: 8px;
}

.page-faq__index-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-left: 3px solid transparent;
  color: var(--muted);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background 0.2s var(--ease), opacity 0.2s var(--ease);
}

.page-faq__index-label:hover {
  background: rgba(0, 212, 255, 0.06);
  color: var(--blue);
}

.page-faq__index-name {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-faq__index-count {
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 7px;
}

.page-faq__index-note {
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

.page-faq__index-note p {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  margin: 0 0 12px;
}

.page-faq__qa-col {
  min-width: 0;
}

.page-faq__qa-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 12px;
  margin-bottom: 28px;
}

.page-faq__qa-head h2 {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 900;
  color: var(--paper);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-faq__qa-head h2::before {
  content: "";
  width: 6px;
  height: 26px;
  background: var(--red);
}

.page-faq__qa-meta {
  font-size: 14px;
  color: var(--muted);
}

.page-faq__cat-group {
  margin-bottom: 36px;
}

.page-faq__cat-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 900;
  color: var(--paper);
  border-bottom: 2px solid var(--border);
  padding-bottom: 8px;
  margin: 0 0 16px;
}

.page-faq__cat-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.page-faq__cat-group--apple .page-faq__cat-icon,
.page-faq__cat-group--apple .page-faq__cat-title {
  border-color: var(--blue);
}

.page-faq__cat-group--apple .page-faq__cat-icon {
  color: var(--blue);
}

.page-faq__cat-group--v3 .page-faq__cat-icon,
.page-faq__cat-group--v3 .page-faq__cat-title {
  border-color: var(--green);
}

.page-faq__cat-group--v3 .page-faq__cat-icon {
  color: var(--green);
}

.page-faq__cat-group--refresh .page-faq__cat-icon,
.page-faq__cat-group--refresh .page-faq__cat-title {
  border-color: var(--blue);
}

.page-faq__cat-group--refresh .page-faq__cat-icon {
  color: var(--blue);
}

.page-faq__cat-group--install .page-faq__cat-icon,
.page-faq__cat-group--install .page-faq__cat-title {
  border-color: var(--red);
}

.page-faq__cat-group--install .page-faq__cat-icon {
  color: var(--red);
}

.page-faq__cat-group--account .page-faq__cat-icon,
.page-faq__cat-group--account .page-faq__cat-title {
  border-color: var(--paper);
}

.page-faq__cat-group--account .page-faq__cat-icon {
  color: var(--paper);
}

.page-faq__faq-item {
  border: 1px solid var(--border);
  background: var(--faq-card);
  margin-bottom: 12px;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-faq__faq-item:hover {
  border-color: rgba(0, 212, 255, 0.35);
}

.page-faq__faq-item[open] {
  border-color: rgba(0, 212, 255, 0.5);
  box-shadow: -4px 0 0 var(--blue);
}

.page-faq__faq-summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
}

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

.page-faq__faq-summary:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: -2px;
}

.page-faq__faq-index {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 900;
  color: var(--blue);
  min-width: 28px;
}

.page-faq__faq-question {
  flex: 1;
  min-width: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper);
}

.page-faq__faq-tag {
  display: none;
  font-size: 12px;
  white-space: nowrap;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 3px 8px;
}

.page-faq__faq-chevron {
  flex: 0 0 auto;
  color: var(--blue);
  transition: transform 0.25s var(--ease);
}

.page-faq__faq-item[open] .page-faq__faq-chevron {
  transform: rotate(180deg);
}

.page-faq__faq-body {
  display: grid;
  gap: 8px;
  padding: 8px 20px 20px;
  border-top: 1px solid var(--border);
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq__faq-body a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq__faq-body a:hover {
  color: var(--green);
}

.page-faq__refresh-figure {
  border: 1px solid var(--border);
  background: var(--faq-card);
  overflow: hidden;
  margin: 16px 0 24px;
}

.page-faq__refresh-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq__refresh-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

.page-faq__guide {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 60px 0;
}

.page-faq__section-head {
  margin-bottom: 32px;
}

.page-faq__section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 40px);
  font-weight: 900;
  color: var(--paper);
  margin: 6px 0 10px;
}

.page-faq__section-lead {
  font-size: 16px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 640px;
  margin: 0;
}

.page-faq__guide-layout {
  display: grid;
  gap: 40px;
}

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

.page-faq__step-item {
  position: relative;
  display: flex;
  gap: 18px;
  padding-bottom: 30px;
}

.page-faq__step-item::before {
  content: "";
  position: absolute;
  left: 23px;
  top: 46px;
  bottom: 0;
  width: 1px;
  background: var(--border);
}

.page-faq__step-item:last-child::before {
  display: none;
}

.page-faq__step-num {
  flex: 0 0 46px;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--blue);
  background: var(--bg-field);
  color: var(--blue);
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 900;
  position: relative;
  z-index: 1;
}

.page-faq__step-copy {
  min-width: 0;
}

.page-faq__step-copy h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 900;
  color: var(--paper);
  margin: 2px 0 6px;
}

.page-faq__step-copy p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
  margin: 0;
}

.page-faq__step-copy a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq__guide-figure {
  border: 1px solid var(--border);
  background: var(--bg-field);
  padding: 12px;
  margin: 0;
}

.page-faq__guide-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-faq__guide-figure figcaption {
  padding: 12px 6px 4px;
  font-size: 13px;
  color: var(--muted);
}

.page-faq__contact {
  padding: 60px 0 80px;
  border-top: 1px solid var(--border);
}

.page-faq__contact-grid {
  display: grid;
  gap: 36px;
}

.page-faq__contact-copy h2 {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 40px);
  font-weight: 900;
  color: var(--paper);
  margin: 6px 0 14px;
}

.page-faq__contact-copy p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
  margin: 0 0 14px;
  max-width: 520px;
}

.page-faq__contact-copy a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq__contact-note {
  font-size: 14px;
}

.page-faq__contact-copy .btn {
  margin-top: 10px;
}

.page-faq__contact-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.page-faq__contact-card {
  padding: 20px;
  border: 1px solid var(--border);
  border-top: 3px solid var(--blue);
  background: var(--faq-card);
}

.page-faq__contact-card--mail {
  border-top-color: var(--blue);
}

.page-faq__contact-card--phone {
  border-top-color: var(--green);
}

.page-faq__contact-card--address {
  border-top-color: var(--paper);
}

.page-faq__contact-card--service {
  border-top-color: var(--red);
}

.page-faq__contact-card span {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 8px;
}

.page-faq__contact-card a {
  color: var(--blue);
  font-weight: 700;
  word-break: break-all;
  text-decoration: none;
}

.page-faq__contact-card a:hover {
  color: var(--green);
}

.page-faq__contact-card p {
  color: var(--paper);
  font-size: 14px;
  line-height: 1.6;
  margin: 0;
}

.page-faq__filter--apple:checked ~ .page-faq__index .page-faq__index-item--apple .page-faq__index-label {
  border-color: rgba(0, 212, 255, 0.45);
  border-left-color: var(--blue);
  color: var(--blue);
  background: rgba(0, 212, 255, 0.05);
}

.page-faq__filter--v3:checked ~ .page-faq__index .page-faq__index-item--v3 .page-faq__index-label {
  border-color: rgba(57, 255, 136, 0.4);
  border-left-color: var(--green);
  color: var(--green);
  background: rgba(57, 255, 136, 0.05);
}

.page-faq__filter--refresh:checked ~ .page-faq__index .page-faq__index-item--refresh .page-faq__index-label {
  border-color: rgba(0, 212, 255, 0.45);
  border-left-color: var(--blue);
  color: var(--blue);
  background: rgba(0, 212, 255, 0.05);
}

.page-faq__filter--install:checked ~ .page-faq__index .page-faq__index-item--install .page-faq__index-label {
  border-color: rgba(255, 59, 92, 0.4);
  border-left-color: var(--red);
  color: var(--red);
  background: rgba(255, 59, 92, 0.05);
}

.page-faq__filter--account:checked ~ .page-faq__index .page-faq__index-item--account .page-faq__index-label {
  border-color: rgba(245, 230, 200, 0.35);
  border-left-color: var(--paper);
  color: var(--paper);
  background: rgba(245, 230, 200, 0.05);
}

.page-faq__filter--apple:not(:checked) ~ .page-faq__index .page-faq__index-item--apple .page-faq__index-label,
.page-faq__filter--v3:not(:checked) ~ .page-faq__index .page-faq__index-item--v3 .page-faq__index-label,
.page-faq__filter--refresh:not(:checked) ~ .page-faq__index .page-faq__index-item--refresh .page-faq__index-label,
.page-faq__filter--install:not(:checked) ~ .page-faq__index .page-faq__index-item--install .page-faq__index-label,
.page-faq__filter--account:not(:checked) ~ .page-faq__index .page-faq__index-item--account .page-faq__index-label {
  opacity: 0.45;
  text-decoration: line-through;
}

.page-faq__filter--apple:not(:checked) ~ .page-faq__qa-col .page-faq__cat-group--apple,
.page-faq__filter--v3:not(:checked) ~ .page-faq__qa-col .page-faq__cat-group--v3,
.page-faq__filter--refresh:not(:checked) ~ .page-faq__qa-col .page-faq__cat-group--refresh,
.page-faq__filter--install:not(:checked) ~ .page-faq__qa-col .page-faq__cat-group--install,
.page-faq__filter--account:not(:checked) ~ .page-faq__qa-col .page-faq__cat-group--account {
  display: none;
}

.page-faq__filter--apple:focus-visible ~ .page-faq__index .page-faq__index-item--apple .page-faq__index-label,
.page-faq__filter--v3:focus-visible ~ .page-faq__index .page-faq__index-item--v3 .page-faq__index-label,
.page-faq__filter--refresh:focus-visible ~ .page-faq__index .page-faq__index-item--refresh .page-faq__index-label,
.page-faq__filter--install:focus-visible ~ .page-faq__index .page-faq__index-item--install .page-faq__index-label,
.page-faq__filter--account:focus-visible ~ .page-faq__index .page-faq__index-item--account .page-faq__index-label {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

@media (min-width: 640px) {
  .page-faq__hero-actions {
    gap: 16px;
  }

  .page-faq__search-panel {
    padding: 28px 32px;
  }

  .page-faq__faq-tag {
    display: inline-block;
  }

  .page-faq__faq-body {
    padding: 10px 24px 22px 66px;
  }
}

@media (min-width: 980px) {
  .page-faq__hero {
    padding: 48px 0 88px;
  }

  .page-faq__hero-layout {
    grid-template-columns: 1.4fr 0.9fr;
    align-items: center;
    gap: 40px;
  }

  .page-faq__hero-aside {
    justify-content: flex-end;
  }

  .page-faq__hero-sticker {
    width: 126px;
    height: 126px;
    font-size: 56px;
  }

  .page-faq__search-section {
    padding: 56px 0 0;
  }

  .page-faq__support {
    padding: 64px 0 0;
  }

  .page-faq__support-inner {
    display: grid;
    grid-template-columns: 264px 1fr;
    gap: 48px;
    align-items: start;
  }

  .page-faq__index {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    margin-bottom: 0;
  }

  .page-faq__qa-head {
    margin-bottom: 32px;
  }

  .page-faq__guide {
    padding: 80px 0;
  }

  .page-faq__guide-layout {
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
  }

  .page-faq__contact {
    padding: 80px 0 96px;
  }

  .page-faq__contact-grid {
    grid-template-columns: 1fr 1.3fr;
    gap: 56px;
    align-items: start;
  }

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