.page-faq {
  --faq-hair: rgba(36, 64, 106, .62);
  --faq-gap: clamp(1.4rem, 4vw, 2.4rem);
}

/* ---------- 首屏框景 ---------- */
.page-faq .breadcrumb {
  margin-bottom: 1.1rem;
}

.page-faq .faq-hero {
  padding-top: clamp(.6rem, 2vw, 1.2rem);
}

.page-faq .faq-hero__frame {
  position: relative;
  overflow: hidden;
  padding: clamp(1.6rem, 5vw, 3rem) clamp(1.15rem, 4vw, 2.8rem) clamp(1.5rem, 4.5vw, 2.6rem);
  border: 1px solid var(--grid);
  border-radius: var(--radius-a);
  background:
    radial-gradient(120% 95% at 100% 0%, rgba(47, 240, 214, .13), transparent 56%),
    linear-gradient(165deg, var(--panel) 0%, var(--panel-2) 46%, var(--deep) 100%);
}

.page-faq .faq-hero__frame::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 9px;
  background-image: repeating-linear-gradient(90deg, var(--grid) 0 1px, transparent 1px 16px);
  opacity: .9;
}

.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  top: 9px;
  left: 0;
  width: 3px;
  height: 46%;
  background: linear-gradient(180deg, var(--cyan), transparent);
}

.page-faq .faq-hero h1 {
  margin: 1rem 0 0;
  max-width: 26ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 5.4vw, 2.55rem);
  line-height: 1.3;
  letter-spacing: .01em;
  color: var(--text);
}

.page-faq .faq-hero__lead {
  margin: 1.05rem 0 0;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-hero__nav {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  margin-top: 1.6rem;
}

.page-faq .faq-hero__nav a {
  display: inline-flex;
  align-items: baseline;
  gap: .45rem;
  padding: .5rem .9rem;
  border: 1px solid var(--grid);
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: .84rem;
  line-height: 1.2;
  color: var(--text);
  text-decoration: none;
  transition: border-color .24s var(--ease), color .24s var(--ease), background-color .24s var(--ease);
}

.page-faq .faq-hero__nav a span {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-faq .faq-hero__nav a:hover,
.page-faq .faq-hero__nav a:focus-visible {
  border-color: var(--cyan);
  background: rgba(47, 240, 214, .08);
}

/* ---------- 章节骨架 ---------- */
.page-faq .faq-section {
  padding-block: clamp(2.2rem, 6vw, 4rem);
}

.page-faq .faq-section + .faq-section {
  border-top: 1px solid var(--faq-hair);
}

.page-faq .section-head {
  display: grid;
  gap: .5rem;
  margin-bottom: clamp(1.3rem, 4vw, 2.1rem);
}

.page-faq .section-index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .24em;
  color: var(--cyan);
}

.page-faq .section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.28rem, 3.7vw, 1.85rem);
  line-height: 1.36;
  color: var(--text);
}

.page-faq .section-desc {
  margin: 0;
  max-width: 64ch;
  font-size: .96rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-figure {
  margin: 0 0 clamp(1.4rem, 4vw, 2rem);
}

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

.page-faq .faq-figure--square {
  max-width: 460px;
  margin: clamp(1.6rem, 5vw, 2.4rem) auto 0;
}

.page-faq .faq-figure--square figcaption {
  margin-top: .7rem;
  text-align: center;
}

/* ---------- 01 步骤卡 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .9rem;
}

.page-faq .faq-step {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .55rem;
  padding: 1.4rem 1.2rem 1.3rem;
  border: 1px solid var(--grid);
  border-radius: var(--radius-b);
  background: linear-gradient(170deg, var(--panel-2), var(--deep) 92%);
  transition: transform .28s var(--ease), border-color .28s var(--ease);
}

.page-faq .faq-step:hover {
  transform: translateY(-3px);
  border-color: rgba(47, 240, 214, .5);
}

.page-faq .faq-step__num {
  display: block;
  padding-bottom: .55rem;
  border-bottom: 2px solid var(--cyan);
  width: 2.4rem;
  font-family: var(--font-mono);
  font-size: 1.9rem;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-faq .faq-step h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.04rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
}

.page-faq .faq-step p {
  margin: 0;
  font-size: .93rem;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-step__note {
  margin-top: auto;
  padding-top: .5rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .06em;
  color: var(--muted-dim);
}

.page-faq .faq-step__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 240, 214, .4);
}

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

/* ---------- 02 板块对照 ---------- */
.page-faq .faq-boards {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-board {
  display: grid;
  gap: .45rem;
  padding: 1.15rem 0 1.15rem .95rem;
  border-bottom: 1px solid var(--faq-hair);
  position: relative;
}

.page-faq .faq-board::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.15rem;
  width: 3px;
  height: 1.1rem;
  background: var(--cyan);
  opacity: .55;
  border-radius: 2px;
}

.page-faq .faq-board__name {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

.page-faq .faq-board p {
  margin: 0;
  font-size: .93rem;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-board .tag {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .05em;
}

/* ---------- 03 筛选 ---------- */
.page-faq .faq-conds {
  display: grid;
  gap: .9rem;
}

.page-faq .faq-cond {
  padding: 1.2rem 1.15rem;
  border: 1px solid var(--grid);
  border-radius: var(--radius-c);
  background: var(--panel-2);
}

.page-faq .faq-cond h3 {
  margin: 0 0 .5rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--cyan);
}

.page-faq .faq-cond p {
  margin: 0;
  font-size: .93rem;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-logic {
  display: grid;
  gap: clamp(1.2rem, 4vw, 2rem);
  margin-top: clamp(1.4rem, 4vw, 2.2rem);
}

.page-faq .faq-flow {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .faq-flow .flow-node rect {
  fill: var(--panel-2);
  stroke: var(--grid);
  stroke-width: 1.5;
}

.page-faq .faq-flow .flow-node text {
  fill: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
}

.page-faq .faq-flow .flow-link path {
  fill: none;
  stroke: var(--cyan);
  stroke-width: 1.5;
  stroke-dasharray: 5 6;
  opacity: .72;
}

.page-faq .faq-flow .flow-out rect {
  fill: rgba(47, 240, 214, .07);
  stroke: var(--cyan);
  stroke-width: 1.5;
}

.page-faq .faq-flow .flow-out text {
  fill: var(--cyan);
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: .08em;
}

.page-faq .faq-flow .flow-out line {
  stroke: var(--grid);
  stroke-width: 3;
  stroke-linecap: round;
}

.page-faq .faq-combos {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .7rem;
}

.page-faq .faq-combos li {
  display: grid;
  grid-template-columns: 1fr;
  gap: .25rem;
  padding: .85rem 1rem;
  border-left: 2px solid var(--grid);
  background: rgba(20, 36, 63, .45);
  border-radius: 0 var(--radius-b) var(--radius-b) 0;
}

.page-faq .faq-combos__cond {
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .04em;
  color: var(--amber);
}

.page-faq .faq-combos__arrow {
  display: none;
  color: var(--muted-dim);
}

.page-faq .faq-combos__res {
  font-size: .9rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 04 问答 ---------- */
.page-faq .faq-qa {
  border-top: 1px solid var(--faq-hair);
}

.page-faq .qa {
  padding-block: clamp(1rem, 3vw, 1.5rem);
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .qa__q {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: .7rem;
  padding-left: .95rem;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
}

.page-faq .qa__q::-webkit-details-marker {
  display: none;
}

.page-faq .qa__q::before {
  content: "";
  position: absolute;
  left: 0;
  top: .18em;
  bottom: .18em;
  width: 3px;
  border-radius: 2px;
  background: transparent;
  transition: background-color .24s var(--ease);
}

.page-faq .qa[open] .qa__q::before {
  background: var(--cyan);
}

.page-faq .qa__q::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  line-height: 1.4;
  color: var(--muted-dim);
}

.page-faq .qa[open] .qa__q::after {
  content: "−";
  color: var(--cyan);
}

.page-faq .qa__num {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--cyan);
  padding-top: .2em;
}

.page-faq .qa__q:hover .qa__text,
.page-faq .qa__q:focus-visible .qa__text {
  color: var(--cyan);
}

.page-faq .qa__text {
  transition: color .24s var(--ease);
}

.page-faq .qa__a {
  margin-top: .85rem;
  padding-left: .95rem;
  display: grid;
  gap: .7rem;
}

.page-faq .qa__a p {
  margin: 0;
  font-size: .94rem;
  line-height: 1.82;
  color: var(--muted);
}

.page-faq .qa__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 240, 214, .4);
}

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

/* 命中率区间条 */
.page-faq .faq-range {
  margin-top: .4rem;
  padding: 1.1rem 1.1rem 1rem;
  border: 1px solid var(--grid);
  border-radius: var(--radius-b);
  background: linear-gradient(150deg, var(--panel-2), var(--deep));
}

.page-faq .faq-range__track {
  position: relative;
  height: 14px;
  border: 1px solid var(--grid);
  border-radius: 999px;
  background: rgba(5, 11, 24, .8);
}

.page-faq .faq-range__band {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 18%;
  width: 67.5%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--cyan-deep), var(--cyan));
  opacity: .55;
}

.page-faq .faq-range__marker {
  position: absolute;
  top: -7px;
  left: 53.5%;
  width: 3px;
  height: 26px;
  border-radius: 2px;
  background: var(--amber);
  box-shadow: 0 0 0 3px rgba(255, 154, 60, .18);
  transition: transform .24s var(--ease);
}

.page-faq .faq-range:hover .faq-range__marker {
  transform: scaleY(1.12);
}

.page-faq .faq-range__scale {
  display: flex;
  justify-content: space-between;
  margin-top: .5rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .05em;
  color: var(--muted-dim);
}

.page-faq .faq-range__legend {
  display: grid;
  gap: .5rem;
  margin: .95rem 0 0;
  padding-top: .85rem;
  border-top: 1px dashed var(--faq-hair);
}

.page-faq .faq-range__legend div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: .8rem;
}

.page-faq .faq-range__legend dt {
  font-size: .82rem;
  color: var(--muted);
}

.page-faq .faq-range__legend dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .92rem;
  color: var(--amber);
  letter-spacing: .02em;
}

/* 手机示意 */
.page-faq .faq-phone {
  width: min(268px, 100%);
  margin: .5rem auto 0;
  text-align: center;
}

.page-faq .faq-phone__screen {
  padding: 1.1rem .9rem 1rem;
  border: 1px solid var(--grid);
  border-radius: 22px 8px 22px 8px;
  background: linear-gradient(180deg, var(--deep), var(--panel-2));
  box-shadow: inset 0 0 0 6px rgba(5, 11, 24, .9);
}

.page-faq .faq-phone__title {
  margin: 0 0 .8rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-faq .faq-phone__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .5rem;
  text-align: left;
}

.page-faq .faq-phone__list li {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .45rem .55rem;
  border-radius: 8px;
  background: rgba(11, 24, 48, .85);
  font-size: .78rem;
  line-height: 1.5;
  color: var(--muted);
}

.page-faq .faq-phone__dot {
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
}

.page-faq .faq-phone .annotation {
  display: block;
  margin-top: .6rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-combos li {
    grid-template-columns: minmax(0, 1fr) 1.4fr;
    align-items: center;
    gap: .9rem;
  }

  .page-faq .faq-combos__arrow {
    display: none;
  }

  .page-faq .faq-range__legend {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
  }

  .page-faq .faq-range__legend div {
    flex-direction: column;
    align-items: flex-start;
    gap: .2rem;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.1rem;
  }

  .page-faq .faq-conds {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.1rem;
  }

  .page-faq .faq-board {
    grid-template-columns: minmax(0, 150px) minmax(0, 220px) minmax(0, 1fr);
    align-items: baseline;
    gap: 1.4rem;
  }

  .page-faq .faq-board::before {
    top: 1.35rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-logic {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-faq .qa {
    display: grid;
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.6fr);
    gap: .4rem clamp(1.4rem, 3.4vw, 3rem);
    align-items: start;
  }

  .page-faq .qa__q {
    grid-column: 1;
    grid-row: 1;
    font-size: 1.02rem;
  }

  .page-faq .qa__a {
    grid-column: 2;
    grid-row: 1;
    margin-top: 0;
    padding-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step,
  .page-faq .faq-range__marker,
  .page-faq .qa__text {
    transition: none;
  }

  .page-faq .faq-step:hover {
    transform: none;
  }
}