.page-faq {
  --faq-gap: clamp(14px, 2vw, 24px);
  --faq-card: rgba(11, 43, 36, .58);
  --faq-card-strong: rgba(18, 80, 68, .55);
  --faq-text-soft: rgba(242, 245, 241, .8);
  --faq-text-dim: rgba(242, 245, 241, .64);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-faq .bvt-breadcrumbs {
  padding: clamp(16px, 3vw, 26px) 0 0;
}
.page-faq .bvt-breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .08em;
}
.page-faq .bvt-breadcrumbs__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--mist);
}
.page-faq .bvt-breadcrumbs__item + .bvt-breadcrumbs__item::before {
  content: "/";
  color: var(--line-strong);
}
.page-faq .bvt-breadcrumbs__link {
  color: var(--mist);
  text-decoration: none;
}
.page-faq .bvt-breadcrumbs__link:hover {
  color: var(--cyan);
}
.page-faq .bvt-breadcrumbs__current {
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(16px, 2.6vw, 26px);
  padding: clamp(20px, 4vw, 40px) 0 clamp(24px, 4vw, 40px);
  position: relative;
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 8px -12vw auto auto;
  width: min(520px, 60vw);
  height: 240px;
  background:
    repeating-linear-gradient(90deg, rgba(46, 242, 194, .12) 0 1px, transparent 1px 26px),
    repeating-linear-gradient(0deg, rgba(46, 242, 194, .08) 0 1px, transparent 1px 26px);
  pointer-events: none;
  mask-image: linear-gradient(120deg, transparent, #000 60%);
  -webkit-mask-image: linear-gradient(120deg, transparent, #000 60%);
  z-index: 0;
}
.page-faq .faq-hero > * {
  position: relative;
  z-index: 1;
}
.page-faq .bvt-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}
.page-faq .bvt-kicker::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--cyan);
}
.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.1rem, 7.4vw, 4rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--paper);
}
.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(1rem, 2.4vw, 1.1rem);
  line-height: 1.7;
  color: var(--faq-text-soft);
}

.page-faq .faq-chips {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 2px 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}
.page-faq .faq-chip {
  display: inline-block;
  white-space: nowrap;
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(18, 80, 68, .35);
  color: var(--paper);
  font-size: .88rem;
  text-decoration: none;
  transition: background-color .2s ease, border-color .2s ease, color .2s ease;
}
.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  background: var(--mid);
  border-color: var(--cyan);
  color: var(--pale);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
.page-faq .faq-stat {
  display: grid;
  gap: 4px;
  padding: 14px 14px 16px;
  background: var(--ink);
}
.page-faq .faq-stat__value {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 3.4vw, 1.28rem);
  letter-spacing: .02em;
  color: var(--cyan);
}
.page-faq .faq-stat__label {
  font-size: .78rem;
  line-height: 1.5;
  color: var(--faq-text-dim);
}

/* ---------- 索引 + 主栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  padding-bottom: clamp(32px, 6vw, 72px);
}
.page-faq .faq-aside {
  display: none;
}
.page-faq .faq-aside__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mist);
}
.page-faq .faq-aside__list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 2px;
}
.page-faq .faq-aside__list a {
  display: grid;
  gap: 4px;
  padding: 11px 12px 11px 16px;
  border-left: 2px solid var(--line-soft);
  color: var(--paper);
  font-size: .92rem;
  text-decoration: none;
  transition: border-color .2s ease, background-color .2s ease;
}
.page-faq .faq-aside__list small {
  font-size: .74rem;
  color: var(--faq-text-dim);
}
.page-faq .faq-aside__list a:hover,
.page-faq .faq-aside__list a:focus-visible {
  border-left-color: var(--cyan);
  background: rgba(46, 242, 194, .07);
}
.page-faq .faq-aside__card {
  display: grid;
  gap: 10px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--indigo);
  box-shadow: var(--panel-shadow);
}
.page-faq .faq-aside__card-title {
  margin: 0;
  font-size: .95rem;
  font-weight: 700;
  color: var(--paper);
}
.page-faq .faq-aside__card-text {
  margin: 0;
  font-size: .82rem;
  line-height: 1.65;
  color: var(--faq-text-soft);
}

/* ---------- 区块 ---------- */
.page-faq .faq-block {
  padding: clamp(24px, 4vw, 44px) 0;
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: 92px;
}
.page-faq .faq-block:first-child {
  border-top: 0;
  padding-top: clamp(8px, 2vw, 16px);
}
.page-faq .faq-block__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 12px;
}
.page-faq .faq-block__num {
  font-family: var(--font-mono);
  font-size: .84rem;
  letter-spacing: .1em;
  color: var(--cyan);
  padding-top: 4px;
}
.page-faq .faq-block h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.45rem, 4.6vw, 2.15rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-faq .faq-block__lead {
  margin: 0 0 clamp(16px, 2.6vw, 24px);
  max-width: 68ch;
  font-size: .97rem;
  line-height: 1.72;
  color: var(--faq-text-soft);
}
.page-faq .faq-sub {
  margin: 0 0 12px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--paper);
}
.page-faq .faq-list {
  margin: 0 0 clamp(18px, 3vw, 26px);
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}
.page-faq .faq-list li {
  position: relative;
  padding-left: 20px;
  font-size: .92rem;
  line-height: 1.7;
  color: var(--faq-text-soft);
}
.page-faq .faq-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 8px;
  height: 2px;
  background: var(--amber);
}

/* ---------- 图片 ---------- */
.page-faq .bvt-media {
  margin: 0 0 clamp(16px, 2.6vw, 24px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--deep);
  box-shadow: var(--panel-shadow);
  overflow: hidden;
}
.page-faq .bvt-media__img,
.page-faq .bvt-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .bvt-media--wide img {
  aspect-ratio: 3 / 2;
}
.page-faq .bvt-media--portrait img {
  aspect-ratio: 4 / 3;
}
.page-faq .bvt-media__caption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: .74rem;
  line-height: 1.6;
  letter-spacing: .02em;
  color: var(--mist);
  border-top: 1px solid var(--line-soft);
  background: rgba(7, 17, 14, .6);
}

/* ---------- 编号步骤 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0 0 clamp(18px, 3vw, 26px);
  padding: 0;
  display: grid;
  gap: 10px;
  counter-reset: faqstep;
}
.page-faq .faq-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  padding: 14px 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--faq-card-strong), var(--faq-card));
  box-shadow: 0 8px 22px rgba(0, 0, 0, .2);
  scroll-margin-top: 92px;
  transition: transform .2s ease, border-color .2s ease;
}
.page-faq .faq-step:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
}
.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-size: .9rem;
  letter-spacing: .06em;
  color: var(--amber);
  padding-top: 2px;
}
.page-faq .faq-step__title {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--paper);
}
.page-faq .faq-step__body p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.7;
  color: var(--faq-text-soft);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-item {
  margin-top: 10px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--faq-card);
  box-shadow: 0 6px 18px rgba(0, 0, 0, .18);
  transition: border-color .2s ease, background-color .2s ease;
}
.page-faq .faq-item[open] {
  border-color: var(--line-strong);
  background: var(--faq-card-strong);
}
.page-faq .faq-item summary {
  position: relative;
  padding: 14px 44px 14px 15px;
  font-size: .95rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
  cursor: pointer;
  list-style: none;
}
.page-faq .faq-item summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item summary::after {
  content: "+";
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--cyan);
}
.page-faq .faq-item[open] summary::after {
  content: "−";
  color: var(--amber);
}
.page-faq .faq-item__body {
  padding: 0 15px 15px;
  font-size: .9rem;
  line-height: 1.72;
  color: var(--faq-text-soft);
  animation: faq-reveal .22s ease-out;
}
.page-faq .faq-item__body p {
  margin: 0;
}
.page-faq .faq-item__body p + p {
  margin-top: 8px;
}
@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 下载区 ---------- */
.page-faq .faq-download {
  display: grid;
  gap: var(--faq-gap);
}
.page-faq .faq-download__note {
  display: grid;
  gap: 10px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--wine);
  box-shadow: var(--panel-shadow);
}
.page-faq .faq-download__note-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--amber);
}
.page-faq .faq-download__note p {
  margin: 0;
  font-size: .86rem;
  line-height: 1.7;
  color: rgba(242, 245, 241, .9);
}
.page-faq .faq-download__note .bvt-btn {
  justify-self: start;
}

.page-faq .faq-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(7, 17, 14, .55);
}
.page-faq .faq-table {
  width: 100%;
  min-width: 440px;
  border-collapse: collapse;
  font-size: .88rem;
}
.page-faq .faq-table caption {
  padding: 11px 13px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--mist);
  border-bottom: 1px solid var(--line-soft);
}
.page-faq .faq-table th {
  text-align: left;
  padding: 10px 13px;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--cyan);
  background: rgba(18, 80, 68, .7);
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-table td {
  padding: 11px 13px;
  vertical-align: top;
  line-height: 1.62;
  border-bottom: 1px solid var(--line-soft);
  color: var(--faq-text-soft);
}
.page-faq .faq-table tbody tr:last-child td {
  border-bottom: 0;
}
.page-faq .faq-table td:first-child {
  width: 40%;
  font-weight: 600;
  color: var(--paper);
}
.page-faq .faq-table tbody tr:hover td {
  background: rgba(46, 242, 194, .05);
}

/* ---------- 反馈区 ---------- */
.page-faq .faq-channels {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(18px, 3vw, 26px);
}
.page-faq .faq-channel {
  padding: 15px 16px;
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius);
  background: var(--faq-card);
  transition: transform .2s ease, border-color .2s ease, background-color .2s ease;
}
.page-faq .faq-channel:nth-child(2) {
  border-left-color: var(--amber);
}
.page-faq .faq-channel:nth-child(3) {
  border-left-color: var(--pale);
}
.page-faq .faq-channel:nth-child(4) {
  border-left-color: var(--mist);
}
.page-faq .faq-channel:hover {
  transform: translateY(-2px);
  background: var(--faq-card-strong);
  border-color: var(--line-strong);
  border-left-color: var(--cyan);
}
.page-faq .faq-channel__title {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: .86rem;
  letter-spacing: .06em;
  color: var(--paper);
}
.page-faq .faq-channel__text {
  margin: 0;
  font-size: .87rem;
  line-height: 1.68;
  color: var(--faq-text-soft);
}

.page-faq .faq-note {
  padding: clamp(16px, 3vw, 24px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--indigo);
  box-shadow: var(--panel-shadow-raised);
}
.page-faq .faq-note__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--paper);
}
.page-faq .faq-note .faq-list {
  margin-bottom: clamp(16px, 3vw, 22px);
}
.page-faq .faq-contact {
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  margin-bottom: 14px;
}
.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding: 11px 13px;
  background: rgba(7, 17, 14, .55);
}
.page-faq .faq-contact__label {
  min-width: 68px;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--mist);
}
.page-faq .faq-contact__value {
  font-family: var(--font-mono);
  font-size: .86rem;
  letter-spacing: .02em;
  color: var(--paper);
  word-break: break-all;
}
.page-faq .faq-note__links {
  margin: 0;
  font-size: .84rem;
  line-height: 1.75;
  color: var(--faq-text-soft);
}
.page-faq .faq-note__links a {
  color: var(--pale);
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 3px;
}
.page-faq .faq-note__links a:hover {
  color: var(--cyan);
  text-decoration-color: var(--cyan);
}

/* ---------- 按钮与复制 ---------- */
.page-faq .bvt-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-size: .88rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background-color .2s ease, color .2s ease, border-color .2s ease;
}
.page-faq .bvt-btn--primary {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
}
.page-faq .bvt-btn--primary:hover {
  background: var(--pale);
  border-color: var(--pale);
}
.page-faq .bvt-btn--ghost {
  background: transparent;
  color: var(--paper);
}
.page-faq .bvt-btn--ghost:hover {
  background: rgba(46, 242, 194, .12);
  border-color: var(--cyan);
  color: var(--pale);
}
.page-faq .faq-copy {
  justify-self: start;
  padding: 7px 13px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: rgba(46, 242, 194, .1);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .06em;
  cursor: pointer;
  transition: background-color .2s ease, color .2s ease, border-color .2s ease;
}
.page-faq .faq-copy:hover {
  background: var(--cyan);
  color: var(--ink);
}
.page-faq .faq-copy[data-copied] {
  border-color: var(--amber);
  color: var(--amber);
  background: rgba(245, 165, 36, .12);
}

/* ---------- 焦点可见 ---------- */
.page-faq a:focus-visible,
.page-faq button:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-faq .faq-channels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .faq-contact__row {
    flex-wrap: nowrap;
  }
}

@media (min-width: 820px) {
  .page-faq .faq-download {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, .8fr);
    align-items: start;
  }
  .page-faq .faq-download__side {
    position: sticky;
    top: 96px;
  }
}

/* ---------- 桌面：粘性左侧索引 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: clamp(26px, 4vw, 56px);
    align-items: start;
  }
  .page-faq .faq-aside {
    display: block;
    position: sticky;
    top: 96px;
    padding-top: clamp(8px, 2vw, 16px);
  }
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1fr);
    padding-bottom: clamp(28px, 4vw, 44px);
  }
  .page-faq .faq-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .faq-channels {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1120px) {
  .page-faq .faq-hero h1 {
    max-width: 18ch;
  }
  .page-faq .faq-block__lead {
    font-size: 1.02rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__body {
    animation: none;
  }
  .page-faq .faq-step:hover,
  .page-faq .faq-channel:hover {
    transform: none;
  }
  .page-faq .faq-chip,
  .page-faq .bvt-btn,
  .page-faq .faq-copy {
    transition: none;
  }
}