.page-faq {
  --faq-idx-w: 300px;
  --faq-gap: clamp(28px, 3.6vw, 60px);
  --faq-cut: 26px;
}

.page-faq .faq-crumb {
  padding-top: clamp(16px, 2.4vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(30px, 5vw, 66px) 0 clamp(40px, 6vw, 88px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(0deg, rgba(53, 242, 208, 0.05) 0 46px, transparent 46px 92px),
    radial-gradient(110% 80% at 92% 4%, rgba(53, 242, 208, 0.14), transparent 58%),
    linear-gradient(180deg, var(--ink-800), var(--ink-900));
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 3.6vw, 54px);
}

.page-faq .faq-hero__lead {
  min-width: 0;
}

.page-faq .faq-hero h1 {
  margin: 0.35em 0 0.55em;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.95rem, 5vw, 3.7rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--chalk-100);
  transform: skewX(-2deg);
  transform-origin: left bottom;
}

.page-faq .faq-hero .lede {
  max-width: 62ch;
  margin: 0;
  color: var(--chalk-400);
  font-size: clamp(1rem, 1.35vw, 1.1rem);
  line-height: 1.85;
}

.page-faq .faq-quick {
  padding: clamp(20px, 2.6vw, 30px);
  min-width: 0;
}

.page-faq .faq-quick .annot {
  margin: 0 0 18px;
}

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

.page-faq .faq-quick__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--line);
}

.page-faq .faq-quick__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-quick__num {
  font-family: var(--font-num);
  font-size: 1.4rem;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--amber-count);
  white-space: nowrap;
}

.page-faq .faq-quick__txt {
  color: var(--chalk-400);
  font-size: 0.9rem;
  line-height: 1.7;
}

@media (min-width: 1040px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.85fr);
    align-items: center;
  }
}

/* ---------- 索引 + 答案两段式 ---------- */
.page-faq .faq-body {
  padding-top: clamp(38px, 5.5vw, 78px);
  padding-bottom: clamp(48px, 7vw, 110px);
}

.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
}

.page-faq .faq-index {
  min-width: 0;
}

.page-faq .faq-index .annot {
  margin: 0 0 14px;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 6px;
  align-items: baseline;
  padding: 13px 12px;
  border-left: 2px solid var(--line);
  color: var(--chalk-400);
  font-size: 0.95rem;
  line-height: 1.55;
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--chalk-100);
  border-left-color: var(--cyan-signal);
  background: var(--glass);
}

.page-faq .faq-index__num {
  font-family: var(--font-num);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--cyan-dim);
}

.page-faq .faq-index__note {
  margin: 18px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--line);
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--chalk-400);
}

@media (min-width: 1080px) {
  .page-faq .faq-body__grid {
    grid-template-columns: var(--faq-idx-w) minmax(0, 1fr);
    align-items: start;
  }
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--bar-h) + 20px);
  }
}

/* ---------- 答案面板 ---------- */
.page-faq .faq-panels {
  min-width: 0;
  display: grid;
  gap: clamp(22px, 3vw, 40px);
}

.page-faq .faq-panel {
  position: relative;
  min-width: 0;
  padding: clamp(24px, 3.2vw, 46px) clamp(20px, 3vw, 46px);
  background: linear-gradient(180deg, rgba(7, 35, 26, 0.92), rgba(4, 21, 15, 0.96));
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
  scroll-margin-top: calc(var(--bar-h) + 24px);
}

.page-faq .faq-panel--flip {
  clip-path: polygon(var(--faq-cut) 0, 100% 0, 100% 100%, 0 100%, 0 var(--faq-cut));
}

.page-faq .faq-panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 64px;
  background: var(--cyan-signal);
}

.page-faq .faq-panel--flip::before {
  left: auto;
  right: 0;
}

.page-faq .faq-panel__head {
  margin-bottom: clamp(14px, 1.8vw, 22px);
}

.page-faq .faq-panel__head .annot {
  margin: 0 0 10px;
}

.page-faq .faq-panel__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.28rem, 2.5vw, 1.95rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--chalk-100);
}

.page-faq .faq-panel__lede {
  margin: 0 0 clamp(18px, 2.2vw, 26px);
  max-width: 68ch;
  color: var(--chalk-400);
  font-size: 1rem;
  line-height: 1.8;
}

.page-faq .faq-panel__foot {
  margin: clamp(20px, 2.4vw, 28px) 0 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--chalk-400);
}

.page-faq .faq-panel__media {
  margin: clamp(20px, 2.6vw, 30px) 0;
  max-width: 100%;
}

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

.page-faq .faq-panel__split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 34px);
}

.page-faq .faq-panel__split-main {
  min-width: 0;
}

@media (min-width: 820px) {
  .page-faq .faq-panel__split {
    grid-template-columns: minmax(0, 1.3fr) minmax(180px, 0.7fr);
    align-items: start;
  }
  .page-faq .faq-panel__media--side {
    margin-top: 0;
  }
}

/* ---------- 步骤序列 ---------- */
.page-faq .steps {
  list-style: none;
  counter-reset: faq-step;
  margin: 0;
  padding: 0;
}

.page-faq .steps > li {
  position: relative;
  padding: 0 0 22px 48px;
  color: var(--chalk-100);
  font-size: 0.96rem;
  line-height: 1.78;
}

.page-faq .steps > li::before {
  counter-increment: faq-step;
  content: counter(faq-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border: 1px solid var(--cyan-dim);
  border-radius: 50%;
  background: var(--ink-900);
  color: var(--cyan-signal);
  font-family: var(--font-num);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

.page-faq .steps > li::after {
  content: "";
  position: absolute;
  left: 15px;
  top: 36px;
  bottom: 4px;
  width: 1px;
  background: var(--line);
}

.page-faq .steps > li:last-child {
  padding-bottom: 0;
}

.page-faq .steps > li:last-child::after {
  display: none;
}

/* ---------- 大屏分区示意 ---------- */
.page-faq .screen-map {
  display: grid;
  gap: 8px;
  margin: clamp(22px, 2.8vw, 32px) 0 0;
  padding: 14px;
  border: 1px solid var(--line);
  background:
    repeating-linear-gradient(0deg, rgba(14, 58, 43, 0.35) 0 18px, transparent 18px 36px),
    var(--ink-800);
}

.page-faq .screen-map__bar {
  padding: 8px;
  border: 1px dashed var(--amber-deep);
  text-align: center;
  font-family: var(--font-num);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--amber-count);
}

.page-faq .screen-map__main {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 8px;
}

.page-faq .screen-map__zone {
  display: grid;
  gap: 6px;
  padding: 20px 14px;
  border: 1px solid var(--line);
}

.page-faq .screen-map__zone--blog {
  background: rgba(53, 242, 208, 0.07);
  border-color: rgba(53, 242, 208, 0.34);
}

.page-faq .screen-map__zone--help {
  background: rgba(255, 176, 32, 0.06);
  border-color: rgba(255, 176, 32, 0.32);
}

.page-faq .screen-map__name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--chalk-100);
}

.page-faq .screen-map__desc {
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--chalk-400);
}

/* ---------- 数据块 ---------- */
.page-faq .faq-panel__stat {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 14px;
  margin: clamp(20px, 2.4vw, 28px) 0 0;
  padding: 18px 20px;
  border-left: 3px solid var(--amber-count);
  background: linear-gradient(90deg, rgba(255, 176, 32, 0.09), transparent 72%);
}

.page-faq .faq-panel__stat-num {
  font-family: var(--font-num);
  font-size: clamp(1.7rem, 3.6vw, 2.4rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--amber-count);
}

.page-faq .faq-panel__stat-txt {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--chalk-400);
}

/* ---------- 折叠问答 ---------- */
.page-faq .q-fold {
  border-top: 1px solid var(--line);
}

.page-faq .q-fold:last-of-type {
  border-bottom: 1px solid var(--line);
}

.page-faq .q-fold summary {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 16px 2px;
  cursor: pointer;
  list-style: none;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--chalk-100);
  transition: color 0.18s var(--ease);
}

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

.page-faq .q-fold summary:hover,
.page-faq .q-fold summary:focus-visible {
  color: var(--cyan-signal);
}

.page-faq .q-fold summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-num);
  font-size: 1.1rem;
  color: var(--cyan-signal);
}

.page-faq .q-fold[open] summary::after {
  content: "–";
}

.page-faq .q-fold__body {
  padding: 0 2px 20px;
  color: var(--chalk-400);
  font-size: 0.93rem;
  line-height: 1.8;
}

.page-faq .q-fold__body p {
  margin: 0;
}

/* ---------- 显示比例示意 ---------- */
.page-faq .ratio-demo {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 16px 0 4px;
}

.page-faq .ratio-demo__item {
  margin: 0;
  display: grid;
  gap: 8px;
}

.page-faq .ratio-demo__screen {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  background: var(--ink-900);
  overflow: hidden;
}

.page-faq .ratio-demo__screen::before {
  content: "";
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(160deg, rgba(53, 242, 208, 0.26), rgba(14, 58, 43, 0.65));
}

.page-faq .ratio-demo__screen--std::before {
  height: 75%;
}

.page-faq .ratio-demo__item figcaption {
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--chalk-400);
}

/* ---------- 联系区块 ---------- */
.page-faq .need-list {
  list-style: none;
  margin: 0 0 clamp(20px, 2.4vw, 28px);
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .need-list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--chalk-400);
}

.page-faq .need-list .num {
  font-family: var(--font-num);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--cyan-dim);
}

.page-faq .contact-strip {
  display: grid;
  gap: 12px;
  padding: clamp(18px, 2.2vw, 24px);
  border: 1px solid var(--line);
  background: var(--glass);
}

.page-faq .contact-strip__row {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
}

.page-faq .contact-strip__key {
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  color: var(--chalk-400);
}

.page-faq .contact-strip__val {
  font-family: var(--font-num);
  font-size: 0.98rem;
  color: var(--chalk-100);
  word-break: break-all;
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .contact-strip__val:hover,
.page-faq .contact-strip__val:focus-visible {
  color: var(--cyan-signal);
  border-color: var(--cyan-signal);
}

.page-faq .contact-strip__note {
  margin: 4px 0 0;
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--chalk-400);
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 560px) {
  .page-faq .faq-panel {
    padding: 22px 16px 26px;
  }
  .page-faq .steps > li {
    padding-left: 42px;
    font-size: 0.93rem;
  }
  .page-faq .steps > li::after {
    left: 14px;
  }
  .page-faq .ratio-demo {
    grid-template-columns: minmax(0, 1fr);
  }
  .page-faq .screen-map__main {
    grid-template-columns: minmax(0, 1fr);
  }
  .page-faq .contact-strip__row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }
  .page-faq .faq-quick__num {
    font-size: 1.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .q-fold summary,
  .page-faq .contact-strip__val {
    transition: none;
  }
}