.page-faq {
  color: var(--text);
}

.page-faq .faq-hero {
  padding-block: clamp(40px, 6vw, 88px) clamp(30px, 4vw, 54px);
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: clamp(18px, 2.6vw, 30px);
}

.page-faq .faq-title {
  margin: 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.9rem, 4.6vw, 3.4rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--text-strong);
}

.page-faq .faq-lede {
  max-width: 62ch;
  margin: clamp(16px, 2.2vw, 26px) 0 0;
  font-family: var(--font-serif);
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  line-height: 1.9;
  color: var(--text-soft);
}

.page-faq .inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 230, 208, 0.4);
  transition: border-color var(--ease), color var(--ease);
}

.page-faq .inline-link:hover,
.page-faq .inline-link:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-faq .inline-link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 2px;
}

.page-faq .hero-jump {
  margin: clamp(22px, 3vw, 34px) 0 0;
  font-size: 0.95rem;
  color: var(--muted);
}

/* ---- 三步上手阶梯 ---- */
.page-faq .steps {
  list-style: none;
  margin: clamp(34px, 5vw, 62px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 3vw, 30px);
}

.page-faq .step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(14px, 2vw, 24px);
  padding-left: clamp(14px, 2vw, 24px);
  border-left: 1px solid var(--line);
}

.page-faq .step__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.4vw, 2.2rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-faq .step__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.02rem, 1.8vw, 1.22rem);
  letter-spacing: -0.01em;
  color: var(--text-strong);
}

.page-faq .step__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 0.97rem;
  line-height: 1.78;
  color: var(--text-soft);
}

/* ---- 章节骨架 ---- */
.page-faq .faq-section {
  padding-block: clamp(46px, 6.4vw, 92px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-lead {
  max-width: 62ch;
  margin: clamp(14px, 1.8vw, 22px) 0 0;
  line-height: 1.78;
  color: var(--text-soft);
}

/* ---- 签表示意 ---- */
.page-faq .bp-demo {
  margin-top: clamp(22px, 3vw, 34px);
  padding: clamp(14px, 2.2vw, 24px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(53, 230, 208, 0.06), rgba(53, 230, 208, 0) 58%),
    var(--panel);
  overflow-x: auto;
}

.page-faq .bp-demo svg {
  display: block;
  width: 100%;
  min-width: 460px;
  height: auto;
}

.page-faq .bp-demo rect {
  fill: var(--ink);
  stroke: var(--line);
}

.page-faq .bp-demo path {
  fill: none;
  stroke: var(--line);
  stroke-width: 1.5;
}

.page-faq .bp-cap {
  fill: var(--muted);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.page-faq .bp-txt {
  fill: var(--text-soft);
  font-family: var(--font-body);
  font-size: 13px;
}

.page-faq .bp-mint {
  fill: var(--mint);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
}

.page-faq .bp-demo__cap {
  margin: 12px 0 0;
  font-family: var(--font-serif);
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .img-frame {
  margin-top: clamp(22px, 3vw, 34px);
}

.page-faq .faq-figure img {
  width: 100%;
}

/* ---- 颜色图例 ---- */
.page-faq .mark-legend {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .mark-legend li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(12px, 1.8vw, 20px);
  align-items: start;
  padding: clamp(14px, 1.9vw, 20px) 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .mark-legend p {
  margin: 0;
  max-width: 62ch;
  font-size: 0.95rem;
  line-height: 1.76;
  color: var(--text-soft);
}

.page-faq .mark-legend strong {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-display);
  font-weight: 800;
  color: var(--text-strong);
}

.page-faq .mark-dot {
  width: 12px;
  height: 12px;
  margin-top: 7px;
  border-radius: 50%;
  flex: none;
}

.page-faq .mark-dot--mint {
  background: var(--mint);
  box-shadow: 0 0 0 4px rgba(123, 227, 168, 0.16);
}

.page-faq .mark-dot--cyan {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 230, 208, 0.14);
}

.page-faq .mark-dot--orange {
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 122, 47, 0.16);
}

/* ---- 筛选三格 ---- */
.page-faq .filter-row {
  display: grid;
  gap: 1px;
  margin-top: clamp(22px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
  overflow: hidden;
}

.page-faq .filter-cell {
  padding: clamp(16px, 2.2vw, 24px);
  background: var(--panel);
}

.page-faq .filter-cell__key {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .filter-cell__val {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--text-soft);
}

/* ---- 更新节奏 ---- */
.page-faq .cadence {
  display: grid;
  gap: 1px;
  margin-top: clamp(22px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
  overflow: hidden;
}

.page-faq .cadence > div {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  padding: clamp(16px, 2.2vw, 26px);
  background: var(--panel);
}

.page-faq .cadence__val {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.6rem, 3.6vw, 2.4rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-faq .cadence__unit {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--muted);
}

.page-faq .cadence__label {
  flex: 1 1 12ch;
  font-size: 0.94rem;
  color: var(--text-soft);
}

/* ---- 设备对比 ---- */
.page-faq .device-grid {
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
  margin-top: clamp(22px, 3vw, 34px);
}

.page-faq .device-card {
  padding: clamp(20px, 2.6vw, 30px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  transition: border-color var(--ease), transform var(--ease);
}

.page-faq .device-card:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-faq .device-card h3 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.08rem;
  letter-spacing: -0.01em;
  color: var(--text-strong);
}

.page-faq .device-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .device-card li {
  position: relative;
  padding-left: 18px;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--text-soft);
}

.page-faq .device-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

/* ---- 问答条目 ---- */
.page-faq .qa-list {
  margin-top: clamp(24px, 3.4vw, 40px);
  border-top: 1px solid var(--line);
}

.page-faq .qa {
  border-bottom: 1px solid var(--line);
}

.page-faq .qa > summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: clamp(12px, 1.8vw, 22px);
  padding: clamp(16px, 2.2vw, 24px) 2px;
}

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

.page-faq .qa > summary::marker {
  content: "";
}

.page-faq .qa__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.84rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .qa__text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.02rem, 2vw, 1.34rem);
  line-height: 1.45;
  letter-spacing: -0.01em;
  color: var(--text-strong);
  transition: color var(--ease);
}

.page-faq .qa > summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.2rem;
  line-height: 1;
  color: var(--muted);
  transition: color var(--ease);
}

.page-faq .qa[open] > summary::after {
  content: "\2013";
  color: var(--cyan);
}

.page-faq .qa > summary:hover .qa__text,
.page-faq .qa > summary:hover::after {
  color: var(--cyan);
}

.page-faq .qa > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 2px;
}

.page-faq .qa__a {
  padding: 0 2px clamp(20px, 2.6vw, 30px) clamp(30px, 4vw, 48px);
}

.page-faq .qa__a p {
  margin: 0 0 0.85em;
  max-width: 66ch;
  line-height: 1.82;
  color: var(--text-soft);
}

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

.page-faq .qa__a .mint {
  color: var(--mint);
  font-weight: 700;
}

.page-faq .qa__a .num {
  font-family: var(--font-mono);
  color: var(--text-strong);
}

/* ---- 更正入口带 ---- */
.page-faq .fix-band {
  position: relative;
  isolation: isolate;
  margin-top: clamp(34px, 5vw, 64px);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}

.page-faq .fix-band__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.22;
  filter: saturate(0.5);
}

.page-faq .fix-band::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(118deg, rgba(7, 12, 24, 0.94), rgba(7, 12, 24, 0.76) 54%, rgba(255, 122, 47, 0.16));
}

.page-faq .fix-band__inner {
  position: relative;
  z-index: 1;
  padding: clamp(28px, 4.4vw, 56px);
}

.page-faq .fix-band__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.3rem, 3vw, 2rem);
  line-height: 1.24;
  letter-spacing: -0.015em;
  color: var(--text-strong);
}

.page-faq .fix-band__text {
  margin: 0 0 clamp(20px, 2.8vw, 30px);
  max-width: 56ch;
  line-height: 1.78;
  color: var(--text-soft);
}

.page-faq .fix-band__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
}

.page-faq .fix-contact {
  display: inline-grid;
  gap: 3px;
  padding: clamp(14px, 1.8vw, 20px) clamp(18px, 2.2vw, 26px);
  border-radius: 6px;
  background: var(--paper);
  color: var(--paper-ink);
  box-shadow: var(--edge);
}

.page-faq .fix-contact__key {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #4b5566;
}

.page-faq .fix-contact__val {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(0.92rem, 1.7vw, 1.06rem);
  color: var(--paper-ink);
  word-break: break-all;
}

.page-faq .fix-band__note {
  margin: clamp(16px, 2.2vw, 22px) 0 0;
  font-size: 0.9rem;
  color: var(--muted);
}

/* ---- 响应式 ---- */
@media (min-width: 760px) {
  .page-faq .filter-row {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-faq .cadence > div {
    flex-wrap: nowrap;
  }
}

@media (min-width: 880px) {
  .page-faq .device-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  .page-faq .step:nth-child(1) {
    margin-left: 0;
  }

  .page-faq .step:nth-child(2) {
    margin-left: 7%;
  }

  .page-faq .step:nth-child(3) {
    margin-left: 14%;
  }
}

@media (max-width: 560px) {
  .page-faq .qa__a {
    padding-left: 0;
  }

  .page-faq .qa__text {
    font-size: 1.02rem;
  }

  .page-faq .fix-band__actions {
    align-items: stretch;
  }

  .page-faq .fix-contact,
  .page-faq .fix-band__actions .btn {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .device-card,
  .page-faq .inline-link,
  .page-faq .qa__text,
  .page-faq .qa > summary::after {
    transition: none;
  }

  .page-faq .device-card:hover {
    transform: none;
  }
}