.page-faq {
  --faq-rule: rgba(201, 162, 39, 0.26);
  --faq-panel: rgba(18, 54, 42, 0.62);
  background: var(--ink-green);
  color: var(--paper);
  font-family: var(--font-sans);
  padding-bottom: clamp(40px, 7vw, 96px);
}

.page-faq .crumbs {
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-faq .crumbs a {
  color: var(--slate);
}

.page-faq .crumbs a:hover,
.page-faq .crumbs a:focus-visible {
  color: var(--gold-light);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: clamp(18px, 3.4vw, 32px) 0 clamp(34px, 5.6vw, 68px);
  border-bottom: 1px solid var(--line-gold);
  background:
    radial-gradient(120% 90% at 10% 0%, rgba(18, 54, 42, 0.92) 0%, rgba(11, 31, 24, 0) 62%),
    linear-gradient(180deg, rgba(7, 16, 13, 0.65), rgba(11, 31, 24, 0));
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 10px;
  background-image: repeating-linear-gradient(90deg, var(--line-gold) 0 1px, transparent 1px 26px);
  opacity: 0.55;
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(20px, 3vw, 34px);
}

.page-faq .faq-hero__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gold-light);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  max-width: 20ch;
  font-size: clamp(32px, 6.4vw, 62px);
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: 800;
  color: var(--paper);
}

.page-faq .faq-hero__intro {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(217, 222, 216, 0.86);
}

.page-faq .faq-hero__actions,
.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 2.6vw, 28px);
}

.page-faq .faq-hero__panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--faq-rule);
  background: linear-gradient(160deg, rgba(18, 54, 42, 0.78), rgba(7, 16, 13, 0.82));
  box-shadow: var(--shadow-panel);
}

.page-faq .faq-hero__panel::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 30px;
  height: 3px;
  background: var(--gold);
}

.page-faq .faq-hero__panel-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

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

.page-faq .faq-hero__panel-note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 工作台骨架 ---------- */

.page-faq .faq-body-wrap {
  padding-top: clamp(26px, 4vw, 48px);
}

.page-faq .faq-workbench {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
}

.page-faq .faq-index__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-faq .faq-index ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 14px;
}

.page-faq .faq-index a {
  display: flex;
  gap: 9px;
  align-items: baseline;
  padding: 11px 0;
  border-bottom: 1px solid var(--line-ghost);
  color: var(--mist);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color 0.2s var(--ease-out);
}

.page-faq .faq-index a span {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-faq .faq-index a:hover,
.page-faq .faq-index a:focus-visible {
  color: var(--gold-light);
}

.page-faq .faq-index__hint {
  margin: 16px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 章节 ---------- */

.page-faq .faq-section {
  padding: clamp(24px, 3.6vw, 40px) 0 clamp(30px, 4.4vw, 54px);
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-section:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-section__head {
  margin-bottom: clamp(18px, 2.8vw, 28px);
}

.page-faq .faq-kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-faq .faq-section h2 {
  margin: 0;
  font-size: clamp(23px, 3.4vw, 36px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-section__note {
  margin: 12px 0 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}

/* ---------- 设备分段切换 ---------- */

.page-faq .faq-devices {
  margin-top: clamp(18px, 2.6vw, 26px);
}

.page-faq .segmented-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .segmented-btn {
  appearance: none;
  background: transparent;
  border: 1px solid transparent;
  color: var(--slate);
  font-family: var(--font-sans);
  font-size: 14px;
  letter-spacing: 0.04em;
  padding: 10px 18px;
  cursor: pointer;
  border-radius: var(--radius) var(--radius) 0 0;
  transition: color 0.18s var(--ease-out), background-color 0.18s var(--ease-out), border-color 0.18s var(--ease-out);
}

.page-faq .segmented-btn:hover {
  color: var(--gold-light);
  background: rgba(201, 162, 39, 0.08);
}

.page-faq .segmented-btn:focus-visible {
  outline: 2px solid var(--gold-light);
  outline-offset: 2px;
}

.page-faq .segmented-btn[aria-selected="true"],
.page-faq .segmented-btn.is-active {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink-deep);
  font-weight: 700;
}

.page-faq .segmented-panel {
  padding-top: clamp(18px, 2.6vw, 26px);
}

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

/* ---------- 步骤列表 ---------- */

.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: faq-step;
}

.page-faq .faq-steps > li {
  counter-increment: faq-step;
  position: relative;
  margin-left: 15px;
  padding: 0 0 20px 42px;
  border-left: 1px solid var(--faq-rule);
}

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

.page-faq .faq-steps > li::before {
  content: counter(faq-step, decimal-leading-zero);
  position: absolute;
  left: -16px;
  top: -3px;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  background: var(--ink-deep);
  border: 1px solid var(--line-gold);
  color: var(--gold-light);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-faq .faq-steps strong {
  display: block;
  margin-bottom: 6px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-faq .faq-steps p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}

/* ---------- 图片 ---------- */

.page-faq .faq-figure {
  margin: clamp(22px, 3.4vw, 34px) 0 0;
}

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

.page-faq .figure-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 版面对照 ---------- */

.page-faq .faq-compare {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-faq .faq-checks {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: faq-check;
  display: grid;
  gap: 14px;
}

.page-faq .faq-checks > li {
  counter-increment: faq-check;
  position: relative;
  padding: 14px 16px 14px 52px;
  background: var(--faq-panel);
  border: 1px solid var(--line-ghost);
  border-left: 2px solid var(--line-gold);
}

.page-faq .faq-checks > li::before {
  content: counter(faq-check, decimal-leading-zero);
  position: absolute;
  left: 16px;
  top: 15px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-faq .faq-checks strong {
  display: block;
  margin-bottom: 6px;
  font-size: 15px;
  color: var(--paper);
}

.page-faq .faq-checks p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-accordion {
  border-top: 1px solid var(--line-soft);
}

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

.page-faq .faq-accordion summary {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  padding: 15px 34px 15px 0;
  list-style: none;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
  transition: color 0.18s var(--ease-out);
}

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

.page-faq .faq-accordion summary:hover {
  color: var(--gold-light);
}

.page-faq .faq-accordion summary:focus-visible {
  outline: 2px solid var(--gold-light);
  outline-offset: 3px;
}

.page-faq .faq-accordion summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--gold);
}

.page-faq .faq-accordion details[open] summary {
  color: var(--gold-light);
}

.page-faq .faq-accordion details[open] summary::after {
  content: "−";
}

.page-faq .faq-answer {
  padding: 0 0 18px;
}

.page-faq .faq-answer p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}

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

.page-faq .faq-answer a {
  color: var(--gold-light);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-tag {
  flex: none;
  padding: 3px 8px;
  border: 1px solid var(--line-gold);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

/* ---------- 历史入口 ---------- */

.page-faq .faq-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: clamp(20px, 3vw, 28px) 0 0;
}

.page-faq .faq-metric {
  border-top: 2px solid var(--gold);
  padding-top: 12px;
}

.page-faq .faq-metric__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 32px);
  letter-spacing: 0.01em;
  font-variant-numeric: tabular-nums;
  color: var(--gold-light);
}

.page-faq .faq-metric__label {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate);
}

/* ---------- 联系支持 ---------- */

.page-faq .faq-support {
  display: grid;
  gap: clamp(20px, 3vw, 30px);
}

.page-faq .faq-contact {
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--faq-rule);
  background: linear-gradient(155deg, rgba(18, 54, 42, 0.9), rgba(7, 16, 13, 0.92));
  box-shadow: var(--shadow-panel);
}

.page-faq .faq-contact dl {
  margin: 0;
  display: grid;
  gap: 16px;
}

.page-faq .faq-contact dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-faq .faq-contact dd {
  margin: 5px 0 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact dd.is-mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  color: var(--gold-light);
}

.page-faq .faq-prepare h3 {
  margin: 0 0 12px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-faq .faq-prepare ul {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-prepare li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

.page-faq .faq-prepare li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 9px;
  height: 1px;
  background: var(--gold);
}

.page-faq .faq-prepare p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--slate);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 860px) {
  .page-faq .faq-compare {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-faq .faq-support {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
  }
}

@media (min-width: 1020px) {
  .page-faq .faq-workbench {
    grid-template-columns: minmax(184px, 236px) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 92px;
    align-self: start;
  }

  .page-faq .faq-index ol {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-index a {
    font-size: 13.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index a,
  .page-faq .segmented-btn,
  .page-faq .faq-accordion summary {
    transition: none;
  }
}