.page-faq {
  --faq-rail-w: 216px;
  --faq-dark-dim: rgba(11, 14, 20, .72);
  --faq-dark-line: rgba(11, 14, 20, .14);
}

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

.page-faq .faq-crumb {
  padding-top: clamp(18px, 3vw, 34px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-top: clamp(34px, 6vw, 74px);
  padding-bottom: clamp(30px, 5vw, 60px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 3px;
  background: linear-gradient(90deg, var(--flame), var(--mist) 55%, transparent 92%);
  opacity: .55;
}

.page-faq .faq-hero h1 {
  margin: 18px 0 0;
  max-width: 21ch;
  font-family: var(--font-sans);
  font-weight: 200;
  font-size: clamp(30px, 6.2vw, 66px);
  line-height: 1.14;
  letter-spacing: -.02em;
}

.page-faq .faq-hero .lede {
  margin-top: 24px;
}

.page-faq .faq-hero-notes {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 32px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--ink-dim);
}

.page-faq .faq-num {
  margin-right: 6px;
  font-size: 27px;
  letter-spacing: -.02em;
  color: var(--ember);
  vertical-align: -3px;
}

/* ---------- 步骤骨架 ---------- */
.page-faq .faq-body {
  padding-block: clamp(38px, 6vw, 82px);
}

.page-faq .faq-rail-list {
  display: flex;
  gap: 10px;
  margin: 16px 0 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail-list a {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  color: var(--ink-dim);
  text-decoration: none;
  font-size: 14px;
  white-space: nowrap;
  transition: color .24s var(--ease), border-color .24s var(--ease), background .24s var(--ease);
}

.page-faq .faq-rail-list a:hover,
.page-faq .faq-rail-list a:focus-visible {
  color: var(--ink);
  border-color: var(--flame);
  background: rgba(244, 85, 43, .10);
}

.page-faq .faq-rail-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--flame);
}

.page-faq .faq-step {
  padding-top: clamp(34px, 5vw, 54px);
  scroll-margin-top: 104px;
}

.page-faq .faq-step + .faq-step {
  margin-top: clamp(34px, 5vw, 58px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-step-title {
  margin: 12px 0 0;
  font-size: clamp(22px, 3.1vw, 34px);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -.01em;
  max-width: 24ch;
}

.page-faq .faq-step p {
  margin: 16px 0 0;
  color: var(--ink-dim);
  line-height: 1.8;
}

.page-faq .faq-step a {
  color: var(--ember);
  text-underline-offset: 3px;
}

.page-faq .faq-figure {
  margin: 26px 0 0;
}

.page-faq .media-frame img {
  width: 100%;
  object-fit: cover;
}

/* 三种走法 */
.page-faq .faq-way-list {
  counter-reset: way;
  display: grid;
  gap: 16px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-way-list > li {
  counter-increment: way;
  padding: 22px 20px 20px;
  background: linear-gradient(158deg, rgba(27, 34, 48, .94), rgba(11, 14, 20, .55));
  border: 1px solid var(--line);
  border-top: 2px solid var(--flame);
}

.page-faq .faq-way-list > li::before {
  content: "0" counter(way);
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--ink-faint);
}

.page-faq .faq-way-name {
  margin: 0;
  font-size: 18px;
  font-weight: 500;
  color: var(--ink);
}

.page-faq .faq-way-list p {
  margin-top: 12px;
  font-size: 15px;
}

.page-faq .faq-way-use {
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  color: var(--ink-faint) !important;
  font-size: 14px !important;
}

/* 操作步骤列表 */
.page-faq .faq-howto {
  counter-reset: howto;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  border-left: 1px solid var(--line);
}

.page-faq .faq-howto li {
  counter-increment: howto;
  position: relative;
  padding: 10px 0 10px 42px;
  color: var(--ink-dim);
  line-height: 1.7;
  font-size: 15px;
}

.page-faq .faq-howto li::before {
  content: counter(howto, decimal-leading-zero);
  position: absolute;
  left: 14px;
  top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--data-blue);
}

.page-faq .faq-howto--tight {
  margin-top: 20px;
}

/* 提示块 */
.page-faq .faq-note {
  margin-top: 26px;
  padding: 22px 22px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--ember);
  background: rgba(27, 34, 48, .55);
}

.page-faq .faq-note-title {
  margin: 0 !important;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--ember);
}

.page-faq .faq-note-list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-note-list li {
  position: relative;
  padding: 8px 0 8px 18px;
  color: var(--ink-dim);
  font-size: 15px;
  line-height: 1.7;
}

.page-faq .faq-note-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 17px;
  width: 8px;
  height: 2px;
  background: var(--flame);
}

/* 回翻 */
.page-faq .faq-ref-list {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-faq .faq-ref-list li {
  padding-left: 16px;
  border-left: 2px solid var(--line-strong);
}

.page-faq .faq-ref-k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-faq .faq-ref-list p {
  margin-top: 8px;
  font-size: 15px;
}

.page-faq .faq-limit {
  margin-top: 26px !important;
  padding: 14px 18px;
  border: 1px dashed var(--line-strong);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--ink-dim) !important;
}

/* 指标组 */
.page-faq .faq-metric-list {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
}

.page-faq .faq-metric-list li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 4px 14px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-metric-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--data-blue);
}

.page-faq .faq-metric-name {
  font-size: 17px;
  font-weight: 500;
  color: var(--ink);
}

.page-faq .faq-metric-list p {
  grid-column: 2;
  margin: 4px 0 0 !important;
  font-size: 15px;
}

/* 档位 */
.page-faq .faq-tier-grid {
  display: grid;
  gap: 16px;
  margin: 26px 0 0;
}

.page-faq .faq-tier {
  padding: 22px 20px 20px;
  background: rgba(27, 34, 48, .8);
  border: 1px solid var(--line);
  box-shadow: 6px 6px 0 rgba(244, 85, 43, .07);
}

.page-faq .faq-tier-name {
  margin: 0 !important;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--ember) !important;
}

.page-faq .faq-tier-line {
  margin-top: 14px !important;
  font-size: 17px;
  color: var(--ink) !important;
  line-height: 1.55;
}

.page-faq .faq-tier-who {
  margin-top: 12px !important;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 14px !important;
  color: var(--ink-faint) !important;
}

/* ---------- 问答区 ---------- */
.page-faq .faq-ask {
  border-top: 1px solid var(--line);
}

.page-faq .faq-ask-lede {
  max-width: 46ch;
  margin: 16px 0 0;
  color: var(--faq-dark-dim);
  line-height: 1.8;
}

.page-faq .faq-ask .filter-bar {
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.page-faq .faq-ask .filter-btn {
  border: 1px solid var(--faq-dark-line);
  background: transparent;
  color: var(--void);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  padding: 8px 14px;
  transition: background .22s var(--ease), color .22s var(--ease), border-color .22s var(--ease);
}

.page-faq .faq-ask .filter-btn[aria-pressed="true"] {
  background: var(--flame);
  border-color: var(--flame);
  color: var(--lamp);
}

.page-faq .faq-filter-status {
  min-height: 1.2em;
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: rgba(11, 14, 20, .55);
}

.page-faq .faq-list {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-item {
  color: var(--void);
  background: var(--paper);
  border: 1px solid var(--faq-dark-line);
  box-shadow: 5px 5px 0 rgba(11, 14, 20, .08);
  transition: transform .28s var(--ease), box-shadow .28s var(--ease);
}

.page-faq .faq-item[open] {
  transform: translateY(-3px);
  box-shadow: 0 12px 26px rgba(11, 14, 20, .16);
}

.page-faq .faq-item[hidden] {
  display: none;
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 17px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
}

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

.page-faq .faq-item summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1.2;
  color: var(--flame-deep);
}

.page-faq .faq-item[open] summary::after {
  content: "\2013";
}

.page-faq .faq-item:focus-within {
  border-color: var(--flame);
}

.page-faq .faq-q-tag {
  flex: none;
  margin-top: 4px;
  padding: 2px 7px;
  border: 1px solid rgba(178, 31, 12, .38);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--flame-deep);
}

.page-faq .faq-a {
  padding: 0 18px 18px;
  border-top: 1px solid rgba(11, 14, 20, .1);
}

.page-faq .faq-a p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--faq-dark-dim);
}

.page-faq .faq-a a {
  color: var(--flame-deep);
  text-underline-offset: 3px;
}

/* ---------- 下一步 ---------- */
.page-faq .faq-next {
  padding-block: clamp(44px, 6vw, 84px);
}

.page-faq .faq-next-grid {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

.page-faq .faq-next-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 24px 22px 22px;
  border: 1px solid var(--line);
  border-bottom: 3px solid var(--flame);
  text-decoration: none;
  background: linear-gradient(170deg, rgba(27, 34, 48, .72), rgba(11, 14, 20, .3));
  transition: transform .28s var(--ease), border-color .28s var(--ease), background .28s var(--ease);
}

.page-faq .faq-next-card:hover,
.page-faq .faq-next-card:focus-visible {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  border-bottom-color: var(--ember);
  background: linear-gradient(170deg, rgba(46, 123, 224, .16), rgba(244, 85, 43, .12));
}

.page-faq .faq-next-k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--mist);
}

.page-faq .faq-next-t {
  font-size: 21px;
  font-weight: 500;
  color: var(--ink);
}

.page-faq .faq-next-d {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-dim);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-way-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .page-faq .faq-metric-list li {
    grid-template-columns: 46px minmax(0, 1fr) minmax(0, 1.1fr);
    align-items: center;
  }

  .page-faq .faq-metric-list p {
    grid-column: 3;
    margin-top: 0 !important;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-body {
    display: grid;
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 76px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 104px;
  }

  .page-faq .faq-rail-list {
    flex-direction: column;
    gap: 0;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-faq .faq-rail-list a {
    padding: 12px 0 12px 18px;
    border: 0;
    border-left: 2px solid var(--line);
    white-space: normal;
  }

  .page-faq .faq-rail-list a:hover,
  .page-faq .faq-rail-list a:focus-visible {
    border-left-color: var(--flame);
    background: linear-gradient(90deg, rgba(244, 85, 43, .12), transparent 78%);
  }

  .page-faq .faq-split {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .9fr);
    gap: clamp(26px, 4vw, 48px);
    align-items: start;
  }

  .page-faq .faq-split .faq-figure {
    margin-top: 22px;
  }
}

@media (max-width: 480px) {
  .page-faq .faq-hero-notes {
    gap: 10px 20px;
  }

  .page-faq .faq-num {
    font-size: 22px;
  }

  .page-faq .faq-item summary {
    padding: 15px 14px;
    font-size: 15px;
  }

  .page-faq .faq-a {
    padding: 0 14px 16px;
  }
}