.page-faq {
  --faq-rail-w: 268px;
  --faq-gap: clamp(24px, 3.4vw, 56px);
  --faq-panel-bg: rgba(255, 255, 255, 0.035);
  --faq-panel-bg-open: rgba(140, 196, 255, 0.075);
  --faq-step: 8px;
  background: var(--navy);
  color: var(--snow);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(28px, 4.5vw, 56px) 0 clamp(32px, 4.5vw, 64px);
  background: linear-gradient(180deg, var(--navy-deep) 0%, var(--navy) 100%);
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(127, 151, 168, 0.1) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(127, 151, 168, 0.1) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 88%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 88%);
  pointer-events: none;
}

.page-faq .faq-hero .container {
  position: relative;
  z-index: 1;
}

.page-faq .breadcrumb-list {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0 0 clamp(20px, 3vw, 36px);
  padding: 0;
  color: var(--mist);
}

.page-faq .breadcrumb-list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

.page-faq .breadcrumb-list a {
  color: var(--mist);
  text-decoration: none;
}

.page-faq .breadcrumb-list a:hover,
.page-faq .breadcrumb-list a:focus-visible {
  color: var(--link);
}

.page-faq .breadcrumb-list [aria-current="page"] {
  color: var(--yellow);
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 56px);
}

.page-faq .faq-hero-main {
  max-width: 44ch;
}

.page-faq .faq-hero h1 {
  margin: 12px 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6vw, 60px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-faq .faq-lead {
  margin: 0 0 clamp(22px, 3vw, 32px);
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.78;
  color: var(--snow);
  opacity: 0.9;
  max-width: 52ch;
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.page-faq .faq-hero-side {
  border-left: 2px solid var(--line-soft);
  padding-left: clamp(16px, 2.4vw, 28px);
}

.page-faq .faq-side-label {
  margin: 0 0 16px;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .hero-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .hero-step {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  align-items: baseline;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-faint);
}

.page-faq .hero-step:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .hero-step-num {
  font-size: 13px;
  color: var(--orange);
  letter-spacing: 0.06em;
}

.page-faq .hero-step-text {
  font-size: 14px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 正文分栏 ---------- */
.page-faq .faq-body {
  background: var(--navy);
  padding: clamp(28px, 4vw, 56px) 0 clamp(48px, 6vw, 88px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  align-items: start;
}

/* 左侧台阶目录 */
.page-faq .faq-rail {
  min-width: 0;
}

.page-faq .faq-rail-title {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

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

.page-faq .tier-link {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  align-items: baseline;
  padding: 10px 8px 10px calc(14px + var(--step, 0px));
  text-decoration: none;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.45;
  border-radius: 0;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-faq .tier-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 2px;
  height: 16px;
  background: var(--line-soft);
  transition: height 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-faq .tier-item:nth-child(1) .tier-link { --step: 0px; }
.page-faq .tier-item:nth-child(2) .tier-link { --step: 8px; }
.page-faq .tier-item:nth-child(3) .tier-link { --step: 16px; }
.page-faq .tier-item:nth-child(4) .tier-link { --step: 24px; }
.page-faq .tier-item:nth-child(5) .tier-link { --step: 32px; }
.page-faq .tier-item:nth-child(6) .tier-link { --step: 40px; }

.page-faq .tier-num {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--line);
  transition: color 0.18s var(--ease);
}

.page-faq .tier-link:hover,
.page-faq .tier-link:focus-visible {
  color: var(--white);
  background: rgba(140, 196, 255, 0.07);
}

.page-faq .tier-link:hover::before,
.page-faq .tier-link:focus-visible::before {
  height: 26px;
  background: var(--link);
}

.page-faq .tier-link:hover .tier-num,
.page-faq .tier-link:focus-visible .tier-num {
  color: var(--link);
}

.page-faq .tier-link:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 3px;
}

.page-faq:has(#first-run:target) .tier-item:nth-child(1) .tier-link,
.page-faq:has(#filter-schedule:target) .tier-item:nth-child(2) .tier-link,
.page-faq:has(#notify:target) .tier-item:nth-child(3) .tier-link,
.page-faq:has(#history:target) .tier-item:nth-child(4) .tier-link,
.page-faq:has(#lineup:target) .tier-item:nth-child(5) .tier-link,
.page-faq:has(#faq-list:target) .tier-item:nth-child(6) .tier-link {
  color: var(--white);
  background: rgba(140, 196, 255, 0.1);
}

.page-faq:has(#first-run:target) .tier-item:nth-child(1) .tier-link::before,
.page-faq:has(#filter-schedule:target) .tier-item:nth-child(2) .tier-link::before,
.page-faq:has(#notify:target) .tier-item:nth-child(3) .tier-link::before,
.page-faq:has(#history:target) .tier-item:nth-child(4) .tier-link::before,
.page-faq:has(#lineup:target) .tier-item:nth-child(5) .tier-link::before,
.page-faq:has(#faq-list:target) .tier-item:nth-child(6) .tier-link::before {
  height: 28px;
  background: var(--orange);
}

.page-faq .faq-rail-note {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-faint);
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist);
  opacity: 0.8;
  max-width: 34ch;
}

/* ---------- 手风琴面板 ---------- */
.page-faq .faq-panels {
  min-width: 0;
  display: grid;
  gap: 10px;
}

.page-faq .qa-panel {
  border: 1px solid var(--line-soft);
  background: var(--faq-panel-bg);
  scroll-margin-top: calc(var(--header-h) + 24px);
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .qa-panel:hover {
  border-color: rgba(140, 196, 255, 0.32);
}

.page-faq .qa-panel[open] {
  background: var(--faq-panel-bg-open);
  border-color: rgba(140, 196, 255, 0.4);
}

.page-faq .qa-summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  padding: clamp(16px, 2vw, 22px) clamp(16px, 2.2vw, 28px);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

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

.page-faq .qa-summary::marker {
  content: "";
}

.page-faq .qa-summary::after {
  content: "";
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--link);
  border-bottom: 2px solid var(--link);
  transform: rotate(45deg);
  transition: transform 0.2s var(--ease);
}

.page-faq .qa-panel[open] > .qa-summary::after {
  transform: rotate(225deg);
}

.page-faq .qa-summary:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: -2px;
}

.page-faq .qa-index {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--orange);
  align-self: start;
  padding-top: 4px;
}

.page-faq .qa-head {
  display: block;
  min-width: 0;
}

.page-faq .qa-title {
  display: block;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.35;
  color: var(--white);
  letter-spacing: -0.01em;
}

.page-faq .qa-sub {
  display: block;
  margin-top: 5px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--mist);
}

.page-faq .qa-content {
  padding: 0 clamp(16px, 2.2vw, 28px) clamp(20px, 2.6vw, 30px);
  color: var(--snow);
}

.page-faq .qa-content > p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--snow);
  opacity: 0.92;
  max-width: 62ch;
}

.page-faq .qa-content > p:last-child {
  margin-bottom: 0;
}

.page-faq .inline-link {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .inline-link:hover,
.page-faq .inline-link:focus-visible {
  color: var(--white);
}

/* 两页路径步骤 */
.page-faq .path-steps {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-faq .path-step {
  position: relative;
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 14px;
  padding: 14px 0 14px 0;
  border-top: 1px solid var(--line-faint);
}

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

.page-faq .path-step-num {
  font-size: 13px;
  color: var(--orange);
  letter-spacing: 0.08em;
  padding-top: 2px;
}

.page-faq .path-step-body {
  min-width: 0;
}

.page-faq .path-step-title {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
}

.page-faq .path-step-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

/* 图片框 */
.page-faq .media-frame {
  margin: 0;
  background: var(--navy-3);
  border: 1px solid var(--line-soft);
  overflow: hidden;
}

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

.page-faq .media-caption {
  margin: 0;
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.55;
  color: var(--mist);
  background: rgba(11, 27, 51, 0.6);
  border-top: 1px solid var(--line-faint);
}

/* 筛选字段 */
.page-faq .filter-map {
  margin: 0 0 20px;
  border-top: 1px solid var(--line-faint);
}

.page-faq .filter-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line-faint);
}

.page-faq .filter-key {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--yellow);
  text-transform: uppercase;
}

.page-faq .filter-val {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--snow);
  opacity: 0.88;
}

/* 设备与开关 */
.page-faq .device-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 6px;
}

.page-faq .switch-demo {
  border: 1px solid var(--line-soft);
  background: rgba(27, 51, 72, 0.55);
  padding: 16px 16px 14px;
}

.page-faq .switch-demo-title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

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

.page-faq .switch-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 10px;
  align-items: center;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-faint);
}

.page-faq .switch-list .switch-row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .switch-label {
  font-size: 14px;
  color: var(--snow);
  min-width: 0;
}

.page-faq .switch-pill {
  position: relative;
  display: inline-block;
  width: 38px;
  height: 20px;
  border: 1px solid var(--line);
  background: transparent;
  flex: none;
}

.page-faq .switch-knob {
  position: absolute;
  left: 2px;
  top: 50%;
  transform: translateY(-50%);
  width: 12px;
  height: 12px;
  background: var(--line);
  transition: left 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .switch-pill.is-on {
  border-color: var(--green);
  background: rgba(46, 155, 107, 0.18);
}

.page-faq .switch-pill.is-on .switch-knob {
  left: 21px;
  background: var(--green);
}

.page-faq .switch-note {
  margin: 14px 0 0;
  font-size: 12px;
  line-height: 1.65;
  color: var(--mist);
  opacity: 0.82;
}

/* 历史数据要点 */
.page-faq .history-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-faint);
}

.page-faq .history-point {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 14px;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-faint);
}

.page-faq .history-num {
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1;
  font-weight: 700;
  color: var(--orange);
}

.page-faq .history-text {
  font-size: 14px;
  line-height: 1.65;
  color: var(--mist);
}

/* 阵容图例 */
.page-faq .legend-list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .legend-item {
  display: grid;
  grid-template-columns: 4px auto 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--line-faint);
}

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

.page-faq .legend-mark {
  display: block;
  width: 4px;
  height: 16px;
  align-self: center;
  background: var(--line);
}

.page-faq .legend-item--in .legend-mark { background: var(--green); }
.page-faq .legend-item--out .legend-mark { background: var(--red); }
.page-faq .legend-item--injured .legend-mark { background: var(--yellow); }
.page-faq .legend-item--start .legend-mark { background: var(--link); }

.page-faq .legend-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--white);
  white-space: nowrap;
}

.page-faq .legend-desc {
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

/* FAQ 列表 */
.page-faq .faq-list {
  margin: 0;
  border-top: 1px solid var(--line-faint);
}

.page-faq .faq-item {
  padding: 14px 0;
  border-bottom: 1px solid var(--line-faint);
}

.page-faq .faq-q {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--white);
  margin-bottom: 6px;
}

.page-faq .faq-a {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 62ch;
}

/* ---------- 收束区 ---------- */
.page-faq .faq-close {
  background: var(--snow);
  color: var(--navy);
  border-top: 1px solid var(--line-soft);
  padding: clamp(36px, 5vw, 72px) 0;
}

.page-faq .faq-close-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 48px);
  align-items: end;
}

.page-faq .faq-close .eyebrow {
  color: var(--ink-link-light);
}

.page-faq .faq-close h2 {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--navy);
}

.page-faq .faq-close-text p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--navy-2);
  max-width: 56ch;
}

.page-faq .faq-close-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.page-faq .faq-close-link {
  font-size: 14px;
  color: var(--navy);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-close-link:hover,
.page-faq .faq-close-link:focus-visible {
  color: var(--ink-link-light);
  border-color: var(--ink-link-light);
}

.page-faq .faq-close-link:focus-visible {
  outline: 2px solid var(--navy);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .filter-row {
    grid-template-columns: 120px 1fr;
    gap: 16px;
    align-items: baseline;
  }

  .page-faq .device-split {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-faq .faq-close-inner {
    grid-template-columns: minmax(0, 1.1fr) auto;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: end;
  }

  .page-faq .faq-hero-side {
    padding-top: 6px;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

@media (min-width: 1180px) {
  .page-faq .qa-content {
    padding-left: clamp(20px, 2.4vw, 32px);
    padding-right: clamp(20px, 2.4vw, 32px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .tier-link,
  .page-faq .tier-link::before,
  .page-faq .tier-num,
  .page-faq .qa-panel,
  .page-faq .qa-summary::after,
  .page-faq .switch-knob,
  .page-faq .faq-close-link {
    transition: none;
  }
}
<<<END>>>