/* ===== 支持中心页面专属样式 ===== */
.page-faq {
  --faq-pad: 24px;
  --faq-panel-bg: var(--color-carbon);
  --faq-panel-line: var(--color-graphite);
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px var(--faq-pad) 72px;
}

.page-faq__breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-muted-gray);
}

.page-faq__breadcrumb a {
  color: var(--color-tech-blue);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-faq__breadcrumb a:hover {
  color: var(--color-gold-bright);
}

.page-faq__breadcrumb-sep {
  color: var(--color-graphite);
}

.page-faq__hero {
  display: grid;
  gap: 24px;
  margin-bottom: 48px;
  padding-bottom: 40px;
  border-bottom: 1px dashed var(--color-graphite);
}

.page-faq__hero-text {
  max-width: 760px;
}

.page-faq__hero-text h1 {
  margin: 12px 0 16px;
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.page-faq__hero-lead {
  font-size: 15px;
  line-height: 1.9;
  color: var(--color-muted-gray);
  max-width: 60ch;
}

.page-faq__hero-lead strong {
  color: var(--color-off-white);
  font-weight: 700;
}

.page-faq__hero-status {
  justify-self: start;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 20px;
  background: var(--color-carbon);
  border-left: 3px solid var(--color-gold);
}

.page-faq__hero-status-note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.9;
  color: var(--color-muted-gray);
}

.page-faq__main-grid {
  display: block;
  margin-bottom: 64px;
}

.page-faq__steps-panel {
  position: relative;
  padding: 28px 20px;
  margin-bottom: 24px;
  background: var(--color-carbon);
  border: 1px solid var(--color-graphite);
  border-top: 3px solid var(--color-gold);
}

.page-faq__steps-panel::before {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, transparent 50%, var(--color-gold) 50%);
}

.page-faq__steps-head {
  margin-bottom: 20px;
}

.page-faq__steps-head h2 {
  margin: 8px 0;
  font-size: 24px;
  font-weight: 900;
  line-height: 1.2;
}

.page-faq__steps-sub {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-muted-gray);
}

.page-faq__steps-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq__step-item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px dashed var(--color-graphite);
}

.page-faq__step-item:last-child {
  border-bottom: 0;
}

.page-faq__step-marker {
  position: relative;
}

.page-faq__step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--color-obsidian);
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.page-faq__step-item:hover .page-faq__step-num {
  background: var(--color-gold);
  color: var(--color-obsidian);
  transform: translateX(2px);
}

.page-faq__step-copy h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
}

.page-faq__step-copy p {
  margin: 0 0 8px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-muted-gray);
}

.page-faq__step-tag {
  display: inline-block;
  padding: 2px 8px;
  border: 1px solid var(--color-tech-blue);
  color: var(--color-tech-blue);
  font-family: var(--font-mono);
  font-size: 12px;
  opacity: 0.9;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.page-faq__step-item:hover .page-faq__step-tag {
  background: var(--color-tech-blue);
  color: var(--color-off-white);
  opacity: 1;
}

.page-faq__steps-figure {
  margin: 20px 0 0;
}

.page-faq__steps-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 400px;
}

.page-faq__steps-figure figcaption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted-gray);
}

.page-faq__faq-panel {
  min-width: 0;
}

.page-faq__faq-intro {
  margin-bottom: 24px;
}

.page-faq__faq-intro h2 {
  margin: 8px 0;
  font-size: 28px;
  font-weight: 900;
  line-height: 1.2;
}

.page-faq__faq-intro-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-muted-gray);
}

.page-faq__faq-grid {
  display: block;
}

.page-faq__faq-card {
  margin-bottom: 16px;
  background: var(--color-carbon);
  border: 1px solid var(--color-graphite);
  border-left: 3px solid var(--color-gold);
  transition: border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}

.page-faq__faq-card:hover {
  border-color: var(--color-gold);
  background: var(--color-graphite);
  transform: translateX(2px);
}

.page-faq__faq-card[open] {
  border-left-color: var(--color-gold-bright);
}

.page-faq__faq-card summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  list-style: none;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  cursor: pointer;
}

.page-faq__faq-card summary::-webkit-details-marker {
  display: none;
}

.page-faq__faq-card summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--color-gold);
  transition: transform 0.2s ease;
}

.page-faq__faq-card[open] summary::after {
  transform: rotate(45deg);
}

.page-faq__faq-mark {
  flex: none;
  width: 8px;
  height: 8px;
  background: var(--color-gold);
  clip-path: polygon(0 0, 100% 0, 0 100%);
}

.page-faq__faq-answer {
  padding: 4px 18px 16px 40px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--color-muted-gray);
}

.page-faq__faq-answer p {
  margin: 0 0 10px;
}

.page-faq__faq-link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-electric-blue);
  text-decoration: none;
}

.page-faq__faq-link:hover {
  color: var(--color-gold-bright);
  text-decoration: underline;
}

.page-faq__faq-figure {
  margin: 36px auto 0;
  max-width: 560px;
}

.page-faq__faq-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq__faq-figure figcaption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted-gray);
  text-align: center;
}

.page-faq__fee-cycle {
  margin-top: 64px;
  padding: 32px 20px;
  background: linear-gradient(135deg, var(--color-carbon) 0%, var(--color-obsidian) 100%);
  border-top: 1px solid var(--color-graphite);
  border-bottom: 1px solid var(--color-graphite);
}

.page-faq__fee-head {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 28px;
}

.page-faq__fee-head h2 {
  margin: 8px 0 0;
  font-size: 24px;
  font-weight: 900;
  line-height: 1.25;
}

.page-faq__fee-switch {
  position: relative;
}

.page-faq__fee-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  opacity: 0;
  pointer-events: none;
}

.page-faq__fee-labels {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  background: var(--color-obsidian);
  border: 1px solid var(--color-graphite);
}

.page-faq__fee-label {
  display: inline-block;
  padding: 7px 20px;
  border: 1px solid transparent;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-muted-gray);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-faq__fee-radio--daily:checked ~ .page-faq__fee-labels .page-faq__fee-label--daily,
.page-faq__fee-radio--monthly:checked ~ .page-faq__fee-labels .page-faq__fee-label--monthly {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-obsidian);
  font-weight: 700;
}

.page-faq__fee-radio--daily:focus-visible ~ .page-faq__fee-labels .page-faq__fee-label--daily,
.page-faq__fee-radio--monthly:focus-visible ~ .page-faq__fee-labels .page-faq__fee-label--monthly {
  outline: 2px solid var(--color-electric-blue);
  outline-offset: 2px;
}

.page-faq__fee-body {
  position: relative;
}

.page-faq__fee-view--daily {
  display: block;
}

.page-faq__fee-view--monthly {
  display: none;
}

.page-faq__fee-radio--monthly:checked ~ .page-faq__fee-view--daily {
  display: none;
}

.page-faq__fee-radio--monthly:checked ~ .page-faq__fee-view--monthly {
  display: block;
}

.page-faq__fee-intro {
  max-width: 680px;
  margin: 0 0 20px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--color-muted-gray);
}

.page-faq__fee-chart {
  display: grid;
  gap: 12px;
  padding: 20px 16px;
  background: var(--color-obsidian);
  border: 1px solid var(--color-graphite);
}

.page-faq__chart-row {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr) 76px;
  gap: 10px;
  align-items: center;
}

.page-faq__chart-name,
.page-faq__chart-value {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted-gray);
}

.page-faq__chart-value {
  text-align: right;
  color: var(--color-gold);
}

.page-faq__chart-track {
  display: flex;
  gap: 4px;
  height: 26px;
  align-items: center;
}

.page-faq__chart-cell {
  display: block;
  flex: 1;
  height: 10px;
  background: var(--color-graphite);
}

.page-faq__chart-cell--accent {
  background: var(--color-tech-blue);
}

.page-faq__chart-cell--blue {
  background: var(--color-electric-blue);
}

.page-faq__chart-cell--gold {
  background: var(--color-gold);
}

.page-faq__fee-note {
  margin: 20px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--color-gold);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-muted-gray);
}

.page-faq__contact {
  margin-top: 64px;
}

.page-faq__contact-panel {
  display: grid;
  gap: 32px;
  padding: 32px 20px;
  background: var(--color-carbon);
  border: 1px solid var(--color-graphite);
  border-top: 3px solid var(--color-gold);
}

.page-faq__contact-copy h2 {
  margin: 8px 0;
  font-size: 26px;
  font-weight: 900;
}

.page-faq__contact-copy p {
  margin: 0 0 20px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--color-muted-gray);
}

.page-faq__contact-channels {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-faq__contact-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  background: var(--color-obsidian);
  border: 1px solid var(--color-graphite);
  border-left: 2px solid var(--color-tech-blue);
}

.page-faq__contact-key {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-muted-gray);
}

.page-faq__contact-val {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--color-off-white);
  word-break: break-all;
}

@media (min-width: 640px) {
  .page-faq__faq-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    align-items: start;
  }

  .page-faq__faq-col:last-child {
    margin-top: 28px;
  }
}

@media (min-width: 768px) {
  .page-faq__hero {
    grid-template-columns: minmax(0, 1fr) 260px;
    align-items: start;
  }

  .page-faq__hero-status {
    justify-self: stretch;
  }

  .page-faq__fee-head {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
  }

  .page-faq__contact-panel {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-faq__main-grid {
    display: grid;
    grid-template-columns: 400px minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-faq__steps-wrap {
    position: sticky;
    top: calc(var(--header-height) + 24px);
  }
}

@media (min-width: 1200px) {
  .page-faq {
    padding-right: 0;
    padding-left: 0;
  }
}