.page-faq {
  --faq-accent: #00E5FF;
  --faq-gold: #E8C36A;
  --faq-gold-dim: #C9A657;
  --faq-surface: #12121F;
  --faq-bg-deep: #060618;
  --faq-line: rgba(140, 158, 255, 0.14);
  --faq-line-strong: rgba(0, 229, 255, 0.4);
  --faq-text-strong: #EDEDF5;
  --faq-text-muted: #B8B8C0;
  background: var(--color-bg);
  color: var(--color-text);
  overflow-x: hidden;
  scroll-behavior: smooth;
}

.page-faq h1,
.page-faq h2,
.page-faq h3 {
  font-family: var(--font-sans);
  color: var(--faq-text-strong);
  margin: 0;
}

.page-faq img {
  max-width: 100%;
  height: auto;
}

/* ===== HERO ===== */
.page-faq__hero {
  position: relative;
  padding: 32px 0 36px;
  border-bottom: 1px solid var(--faq-line);
  background: linear-gradient(180deg, var(--faq-bg-deep) 0%, var(--color-bg) 76%);
}

.page-faq__hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 62%, rgba(30, 42, 90, 0.5) 63%, transparent 66%);
  pointer-events: none;
}

.page-faq__hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--faq-accent), transparent);
}

.page-faq__hero-inner {
  position: relative;
  z-index: 1;
}

.page-faq__hero-grid {
  display: grid;
  gap: 30px;
  margin-top: 36px;
}

.page-faq__hero-copy h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 14px 0 18px;
  max-width: 760px;
}

.page-faq__lead {
  color: var(--faq-text-muted);
  font-size: 1.0625rem;
  line-height: 1.8;
  max-width: 720px;
  margin: 0 0 20px;
}

.page-faq__search {
  display: flex;
  align-items: center;
  gap: 14px;
  border: 1px solid var(--faq-line-strong);
  background: rgba(18, 18, 31, 0.78);
  padding: 14px 16px;
  max-width: 600px;
}

.page-faq__search-ico {
  width: 20px;
  height: 20px;
  color: var(--faq-accent);
  flex: none;
  opacity: 0.8;
}

.page-faq__search span:nth-child(2) {
  flex: 1;
  color: var(--faq-text-muted);
  font-size: 0.95rem;
}

.page-faq__search-kbd {
  font-family: var(--font-mono);
  border: 1px solid var(--faq-line);
  color: var(--faq-gold);
  font-size: 0.85rem;
  padding: 2px 10px;
  background: var(--faq-bg-deep);
}

.page-faq__herolinks {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-faq__herolink {
  border: 1px solid var(--faq-line-strong);
  color: var(--faq-accent);
  text-decoration: none;
  padding: 9px 20px;
  font-size: 0.92rem;
  font-weight: 600;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.page-faq__herolink:hover {
  background: rgba(0, 229, 255, 0.08);
  border-color: var(--faq-accent);
  color: #ffffff;
}

.page-faq__hero-panel {
  border: 1px solid var(--faq-line);
  background: linear-gradient(160deg, var(--color-primary) 0%, var(--faq-surface) 70%);
  padding: 26px 24px;
  position: relative;
}

.page-faq__hero-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--faq-accent), transparent 70%);
}

.page-faq__panel-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 3px;
  color: var(--faq-accent);
  border-left: 3px solid var(--faq-accent);
  padding-left: 12px;
}

.page-faq__hero-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 18px;
}

.page-faq__stat {
  border: 1px solid var(--faq-line);
  padding: 16px 14px;
  background: rgba(6, 6, 24, 0.42);
}

.page-faq__stat dt {
  font-family: var(--font-mono);
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--faq-gold);
  line-height: 1.2;
}

.page-faq__stat dd {
  margin: 6px 0 0;
  font-size: 0.88rem;
  color: var(--faq-text-muted);
  line-height: 1.5;
}

.page-faq__panel-note {
  margin: 16px 0 0;
  padding: 12px;
  border: 1px solid var(--faq-line-strong);
  background: rgba(0, 229, 255, 0.05);
  color: var(--faq-text-muted);
  font-size: 0.88rem;
  line-height: 1.65;
}

/* ===== LAYOUT ===== */
.page-faq__layout {
  display: grid;
  gap: 30px;
  padding-top: 40px;
  padding-bottom: 16px;
}

.page-faq__main {
  min-width: 0;
  display: grid;
  gap: 8px;
}

/* ===== SIDEBAR ===== */
.page-faq__sidebar {
  min-width: 0;
}

.page-faq__side-sticky {
  display: flex;
  align-items: stretch;
  overflow-x: auto;
  gap: 6px;
  padding: 12px;
  border: 1px solid var(--faq-line);
  background: var(--faq-surface);
  scrollbar-width: thin;
}

.page-faq__side-name {
  flex: none;
  align-self: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--faq-text-muted);
  border: 1px solid var(--faq-line);
  background: rgba(6, 6, 24, 0.6);
  padding: 8px 12px;
}

.page-faq__side-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  flex: none;
  padding: 9px 14px;
  border: 1px solid transparent;
  color: var(--faq-text-muted);
  text-decoration: none;
  font-size: 0.92rem;
  transition: all 0.2s;
}

.page-faq__side-link span {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--faq-accent);
}

.page-faq__side-link:hover {
  border-color: var(--faq-line-strong);
  color: #ffffff;
  background: rgba(0, 229, 255, 0.05);
}

.page-faq__side-link--gold span {
  color: var(--faq-gold);
}

.page-faq__side-contact {
  flex: none;
  min-width: 210px;
  border-left: 1px solid var(--faq-line);
  padding: 4px 4px 4px 14px;
  display: grid;
  gap: 5px;
  align-content: start;
}

.page-faq__side-contact-title {
  font-size: 0.8rem;
  letter-spacing: 2px;
  color: var(--faq-gold);
}

.page-faq__side-contact-line {
  color: var(--faq-text);
  font-size: 0.88rem;
  word-break: break-all;
}

.page-faq__side-contact-time {
  color: var(--faq-text-muted);
  font-size: 0.82rem;
  line-height: 1.5;
}

.page-faq__side-contact-addr {
  color: var(--faq-text-muted);
  font-size: 0.8rem;
  line-height: 1.5;
}

/* ===== SECTION HEAD ===== */
.page-faq__section {
  padding: 34px 0 38px;
  border-top: 1px solid var(--faq-line);
  scroll-margin-top: calc(var(--header-h) + 24px);
  position: relative;
}

.page-faq__section:first-child {
  border-top: none;
}

.page-faq__section-head {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 24px;
}

.page-faq__sec-no {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 2px;
  color: var(--faq-accent);
  border: 1px solid var(--faq-line-strong);
  background: rgba(0, 229, 255, 0.05);
  padding: 5px 11px;
  width: max-content;
}

.page-faq__sec-heading h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1.3;
  margin-bottom: 8px;
}

.page-faq__sec-heading p {
  color: var(--faq-text-muted);
  line-height: 1.7;
  margin: 0;
}

.page-faq__chip {
  width: max-content;
  font-size: 0.8rem;
  letter-spacing: 1px;
  padding: 4px 12px;
  border: 1px solid rgba(232, 195, 106, 0.4);
  color: var(--faq-gold);
  background: rgba(232, 195, 106, 0.06);
}

/* ===== FAQ ITEMS ===== */
.page-faq__list {
  display: grid;
  gap: 10px;
}

.page-faq__item {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--faq-line);
  background: linear-gradient(135deg, var(--color-primary-alt) 0%, var(--faq-surface) 88%);
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-faq__item::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--faq-accent), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.page-faq__item[open] {
  border-color: var(--faq-line-strong);
}

.page-faq__item[open]::after {
  opacity: 1;
}

.page-faq__item summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 19px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq__qmark {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  flex: none;
  border: 1px solid var(--faq-line-strong);
  color: var(--faq-accent);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  background: rgba(0, 229, 255, 0.06);
}

.page-faq__item summary span:nth-child(2) {
  flex: 1;
  font-weight: 600;
  font-size: 1rem;
  color: var(--faq-text-strong);
  line-height: 1.45;
}

.page-faq__chev {
  width: 20px;
  height: 20px;
  flex: none;
  color: var(--faq-accent);
  transition: transform 0.3s ease;
}

.page-faq__item[open] .page-faq__chev {
  transform: rotate(180deg);
}

.page-faq__answer {
  padding: 4px 18px 20px 58px;
  color: var(--faq-text-muted);
  line-height: 1.75;
  font-size: 0.95rem;
}

.page-faq__answer::before {
  content: "答案";
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 2px;
  color: var(--faq-gold);
  margin-bottom: 8px;
  border: 1px solid rgba(232, 195, 106, 0.35);
  background: rgba(232, 195, 106, 0.06);
  padding: 2px 8px;
}

.page-faq__answer p {
  margin: 0;
}

/* ===== SUPPORT LAYOUT ===== */
.page-faq__support-layout {
  display: grid;
  gap: 22px;
}

.page-faq__support-figure {
  margin: 0;
  border: 1px solid var(--faq-line);
  background: var(--faq-surface);
  align-self: start;
}

.page-faq__support-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq__support-figure figcaption {
  padding: 12px 16px;
  font-size: 0.88rem;
  color: var(--faq-text-muted);
  border-top: 1px solid var(--faq-line);
}

/* ===== TUTORIAL SWITCH ===== */
.page-faq__tutswitch {
  position: relative;
  border: 1px solid var(--faq-line);
  background: var(--faq-surface);
  padding: 18px;
}

.page-faq__tutradio {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.page-faq__tutlabel {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  margin-right: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--faq-text-muted);
  border: 1px solid transparent;
  transition: all 0.2s;
}

.page-faq__tutlabel svg {
  width: 17px;
  height: 17px;
}

.page-faq__tutradio:checked + .page-faq__tutlabel {
  color: var(--faq-accent);
  border-color: var(--faq-line-strong);
  background: rgba(0, 229, 255, 0.06);
}

.page-faq__tut-hint {
  display: block;
  margin-top: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--faq-line);
  color: var(--faq-text-muted);
  font-size: 0.85rem;
  line-height: 1.6;
}

.page-faq__tutpanel {
  padding-top: 20px;
}

.page-faq__tutpanel--grid {
  display: grid;
  gap: 18px;
}

.page-faq__tutpanel--voice {
  display: none;
}

.page-faq__tutradio#tut-voice:checked ~ .page-faq__tutpanel--grid {
  display: none;
}

.page-faq__tutradio#tut-voice:checked ~ .page-faq__tutpanel--voice {
  display: block;
}

/* ===== TUTORIAL CARD ===== */
.page-faq__tutcard {
  display: grid;
  gap: 16px;
  padding: 16px;
  border: 1px solid var(--faq-line);
  background: linear-gradient(145deg, rgba(30, 42, 90, 0.65) 0%, var(--faq-surface) 80%);
}

.page-faq__tut-imgwrap {
  position: relative;
  overflow: hidden;
  background: var(--faq-bg-deep);
}

.page-faq__tut-imgwrap img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq__tutduration {
  position: absolute;
  right: 12px;
  bottom: 12px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--faq-gold);
  background: rgba(6, 6, 24, 0.85);
  border: 1px solid rgba(232, 195, 106, 0.35);
  padding: 3px 9px;
}

.page-faq__tutbody h3 {
  font-size: 1.08rem;
  line-height: 1.4;
  margin-bottom: 12px;
}

.page-faq__tutbody ol {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 8px;
  color: var(--faq-text-muted);
  line-height: 1.6;
  font-size: 0.94rem;
}

/* ===== VOICE PANEL ===== */
.page-faq__voice-intro {
  color: var(--faq-text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
  font-size: 0.95rem;
}

.page-faq__voice-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq__voice-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px 14px;
  align-items: center;
  padding: 14px 16px;
  border: 1px solid var(--faq-line);
  background: linear-gradient(90deg, rgba(30, 42, 90, 0.25), rgba(18, 18, 31, 0.9));
}

.page-faq__voice-list svg {
  width: 20px;
  height: 20px;
  color: var(--faq-accent);
}

.page-faq__voice-list span {
  color: var(--faq-text-strong);
  font-size: 0.94rem;
  line-height: 1.5;
}

.page-faq__voice-list em {
  grid-column: 2;
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--faq-gold);
  letter-spacing: 1px;
}

/* ===== RESOLVE ===== */
.page-faq__resolve {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 20px;
  align-items: start;
  border: 1px solid var(--faq-line-strong);
  background: linear-gradient(135deg, rgba(30, 42, 90, 0.55) 0%, rgba(18, 18, 31, 0.92) 72%);
  padding: 30px 28px;
  margin: 10px 0 46px;
}

.page-faq__resolve-icon {
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  border: 1px solid var(--faq-accent);
  color: var(--faq-accent);
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 700;
  background: rgba(0, 229, 255, 0.06);
}

.page-faq__resolve h2 {
  font-size: 1.4rem;
  margin-bottom: 8px;
}

.page-faq__resolve p {
  color: var(--faq-text-muted);
  line-height: 1.7;
  margin: 0 0 18px;
}

.page-faq__resolve-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== DESKTOP ===== */
@media (min-width: 992px) {
  .page-faq__hero {
    padding: 48px 0 56px;
  }

  .page-faq__hero-grid {
    grid-template-columns: minmax(0, 1fr) 360px;
    align-items: stretch;
    gap: 36px;
    margin-top: 46px;
  }

  .page-faq__hero-copy h1 {
    margin-top: 18px;
  }

  .page-faq__layout {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 40px;
    align-items: start;
    padding-top: 56px;
  }

  .page-faq__side-sticky {
    flex-direction: column;
    gap: 2px;
    padding: 14px;
    position: sticky;
    top: calc(var(--header-h) + 24px);
    align-items: stretch;
  }

  .page-faq__side-link {
    white-space: normal;
  }

  .page-faq__side-contact {
    border-left: none;
    border-top: 1px solid var(--faq-line);
    margin-top: 10px;
    padding: 14px 0 0;
    min-width: 0;
  }

  .page-faq__section {
    padding: 52px 0 56px;
  }

  .page-faq__section-head {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: start;
    gap: 18px;
    margin-bottom: 28px;
  }

  .page-faq__answer {
    padding-left: 64px;
  }

  .page-faq__support-layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 24px;
  }

  .page-faq__tutswitch {
    padding: 22px;
  }

  .page-faq__tutpanel--grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-faq__voice-list li {
    grid-template-columns: auto 1fr auto;
  }

  .page-faq__voice-list em {
    grid-column: auto;
  }

  .page-faq__resolve {
    padding: 36px 38px;
    margin-bottom: 56px;
  }
}

@media (min-width: 640px) and (max-width: 991px) {
  .page-faq__tutpanel--grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq__tutcard:last-child {
    grid-column: span 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq__item::before,
  .page-faq__chev {
    animation: none !important;
  }

  .page-faq__item summary,
  .page-faq__item[open] .page-faq__chev {
    transition: none !important;
  }
}

.page-faq {
  --faq-text: currentColor;
}