/* ================= 页面作用域与色序 ================= */
.page-faq {
  --faq-accent: var(--track-green);
  --faq-rail-w: 236px;
  --faq-card-bg: rgba(18, 34, 56, .55);
  --faq-card-bg-open: rgba(18, 34, 56, .88);
  --faq-key-bg: rgba(34, 64, 95, .38);
  background: var(--deep-space);
  color: var(--chalk-white);
}

/* ================= 面包屑 ================= */
.page-faq .breadcrumbs {
  margin: 0 0 clamp(18px, 2.6vw, 30px);
}

.page-faq .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--mist-grey);
}

.page-faq .crumbs li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-faq .crumbs li + li::before {
  content: "/";
  color: var(--line-blue);
}

.page-faq .crumbs a {
  color: var(--mist-grey);
  text-decoration: none;
  transition: color .18s ease;
}

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

/* ================= 首屏 ================= */
.page-faq .faq-intro {
  position: relative;
  padding: clamp(96px, 13vw, 152px) 0 clamp(40px, 5.5vw, 66px);
  background:
    radial-gradient(920px 460px at 84% -14%, rgba(255, 90, 31, .16), transparent 64%),
    radial-gradient(700px 380px at 4% 8%, rgba(23, 208, 138, .11), transparent 68%),
    linear-gradient(180deg, var(--void-black) 0%, var(--deep-space) 100%);
  overflow: hidden;
}

.page-faq .faq-intro-inner {
  position: relative;
  z-index: 1;
}

.page-faq .eyebrow {
  margin: 0 0 14px;
  font-size: 12.5px;
  letter-spacing: .2em;
  color: var(--track-green);
}

.page-faq .faq-intro h1 {
  margin: 0 0 clamp(16px, 2.2vw, 22px);
  font-size: clamp(30px, 5.2vw, 62px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--chalk-white);
  max-width: 19em;
}

.page-faq .faq-lede {
  margin: 0;
  max-width: 660px;
  font-size: clamp(15px, 1.3vw, 17px);
  line-height: 1.85;
  color: var(--mist-grey);
}

.page-faq .faq-glance {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: clamp(28px, 4vw, 42px) 0 0;
  padding-top: clamp(20px, 2.6vw, 26px);
  border-top: var(--edge-soft);
}

.page-faq .faq-glance-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-faq .faq-glance dt {
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--mist-grey);
}

.page-faq .faq-glance dd {
  margin: 0;
  font-size: 15px;
  color: var(--chalk-white);
}

.page-faq .faq-glance .mono {
  margin-right: 4px;
  font-size: 21px;
  line-height: 1;
  font-weight: 700;
  color: var(--signal-orange);
}

@media (min-width: 720px) {
  .page-faq .faq-glance {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
  }
}

/* ================= 主体布局 ================= */
.page-faq .faq-body {
  padding: clamp(34px, 4.6vw, 60px) 0 clamp(64px, 9vw, 116px);
  background:
    linear-gradient(180deg, var(--deep-space) 0%, var(--void-black) 100%);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  align-items: start;
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 64px);
  }
}

.page-faq .faq-main {
  min-width: 0;
}

/* ================= 左侧问题目录 ================= */
.page-faq .faq-rail-title {
  margin: 0 0 12px;
  font-size: 12.5px;
  letter-spacing: .18em;
  color: var(--mist-grey);
}

.page-faq .faq-toc {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  border-top: var(--edge-soft);
  padding-top: 12px;
}

.page-faq .faq-toc li {
  display: contents;
}

.page-faq .faq-toc a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px 8px 12px;
  border: var(--edge-soft);
  border-radius: 999px;
  color: var(--mist-grey);
  font-size: 13.5px;
  text-decoration: none;
  transition: color .18s ease, border-color .18s ease, background .18s ease;
}

.page-faq .faq-toc a::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--line-blue);
  transition: background .18s ease, box-shadow .18s ease;
}

.page-faq .faq-toc .toc-no {
  font-size: 11px;
  color: var(--line-blue);
  transition: color .18s ease;
}

.page-faq .faq-toc a:hover,
.page-faq .faq-toc a:focus-visible {
  color: var(--chalk-white);
  border-color: rgba(255, 90, 31, .55);
  background: rgba(255, 90, 31, .08);
}

.page-faq .faq-toc a:hover::before,
.page-faq .faq-toc a:focus-visible::before {
  background: var(--signal-orange);
  box-shadow: 0 0 0 3px rgba(255, 90, 31, .22);
}

.page-faq .faq-toc a:hover .toc-no,
.page-faq .faq-toc a:focus-visible .toc-no {
  color: var(--orange-glow);
}

@media (min-width: 960px) {
  .page-faq .faq-rail-sticky {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    padding-right: 6px;
  }

  .page-faq .faq-toc {
    display: grid;
    gap: 2px;
    padding-top: 0;
    border-top: 0;
    border-left: var(--edge-soft);
  }

  .page-faq .faq-toc li {
    display: block;
  }

  .page-faq .faq-toc a {
    display: flex;
    padding: 9px 10px 9px 14px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    margin-left: -1px;
    font-size: 14px;
  }

  .page-faq .faq-toc a:hover,
  .page-faq .faq-toc a:focus-visible {
    background: rgba(34, 64, 95, .3);
    border-left-color: var(--signal-orange);
  }
}

/* ================= 分组 ================= */
.page-faq .faq-group {
  padding: clamp(28px, 4vw, 42px) 0;
  border-top: var(--edge-soft);
  scroll-margin-top: calc(var(--header-h) + 22px);
}

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

.page-faq .faq-group--start    { --faq-accent: var(--track-green); }
.page-faq .faq-group--subscribe{ --faq-accent: var(--signal-orange); }
.page-faq .faq-group--schedule { --faq-accent: var(--track-green); }
.page-faq .faq-group--live     { --faq-accent: var(--live-cyan); }
.page-faq .faq-group--stats    { --faq-accent: var(--orange-glow); }
.page-faq .faq-group--version  { --faq-accent: var(--signal-orange); }
.page-faq .faq-group--help     { --faq-accent: var(--mist-grey); }

.page-faq .faq-group-head {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "no title"
    "note note";
  align-items: baseline;
  gap: 6px 14px;
  margin-bottom: clamp(16px, 2.4vw, 22px);
}

.page-faq .faq-group-head .chapter-no {
  grid-area: no;
  font-size: 13px;
  font-weight: 700;
  color: var(--faq-accent);
  letter-spacing: .06em;
}

.page-faq .faq-group-title {
  grid-area: title;
  margin: 0;
  font-size: clamp(21px, 2.9vw, 30px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--chalk-white);
}

.page-faq .faq-group-note {
  grid-area: note;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist-grey);
}

/* ================= 问答卡片 ================= */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

.page-faq .faq-card {
  position: relative;
  border: var(--edge);
  border-radius: var(--radius-md);
  background: var(--faq-card-bg);
  overflow: hidden;
  transition: border-color .2s ease, background .2s ease;
}

.page-faq .faq-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--faq-accent);
  opacity: .5;
  transition: opacity .2s ease;
}

.page-faq .faq-card:hover {
  border-color: rgba(34, 64, 95, 1);
}

.page-faq .faq-card:hover::before {
  opacity: .8;
}

.page-faq .faq-card[open] {
  background: var(--faq-card-bg-open);
  border-color: rgba(34, 64, 95, 1);
}

.page-faq .faq-card[open]::before {
  opacity: 1;
}

.page-faq .faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 18px 15px 21px;
  list-style: none;
  cursor: pointer;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--chalk-white);
  transition: color .18s ease;
}

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

.page-faq .faq-q::marker {
  content: "";
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--signal-orange);
  outline-offset: -2px;
}

.page-faq .faq-q-text {
  min-width: 0;
}

.page-faq .faq-q-icon {
  position: relative;
  flex: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid var(--line-blue);
  transition: border-color .2s ease, background .2s ease;
}

.page-faq .faq-q-icon::before,
.page-faq .faq-q-icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: var(--mist-grey);
  transition: transform .24s ease, background .2s ease;
}

.page-faq .faq-q-icon::before {
  width: 10px;
  height: 1.5px;
}

.page-faq .faq-q-icon::after {
  width: 1.5px;
  height: 10px;
}

.page-faq .faq-card[open] .faq-q-icon {
  border-color: var(--faq-accent);
  background: rgba(34, 64, 95, .5);
}

.page-faq .faq-card[open] .faq-q-icon::before,
.page-faq .faq-card[open] .faq-q-icon::after {
  background: var(--faq-accent);
}

.page-faq .faq-card[open] .faq-q-icon::after {
  transform: translate(-50%, -50%) rotate(90deg) scaleY(0);
}

.page-faq .faq-a {
  padding: 0 18px 17px 21px;
}

.page-faq .faq-a p {
  margin: 0 0 10px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist-grey);
}

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

.page-faq .faq-a .faq-key {
  padding: 9px 13px;
  border-left: 2px solid var(--faq-accent);
  border-radius: var(--radius-sm);
  background: var(--faq-key-bg);
  color: var(--chalk-white);
  font-size: 14px;
  line-height: 1.72;
}

.page-faq .faq-a .faq-key .mono {
  color: var(--faq-accent);
  font-weight: 700;
}

.page-faq .faq-a .faq-link {
  margin-top: 12px;
  font-size: 14px;
}

.page-faq .faq-a .faq-link a {
  color: var(--orange-glow);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 138, 76, .4);
  padding-bottom: 1px;
  transition: color .18s ease, border-color .18s ease;
}

.page-faq .faq-a .faq-link a:hover,
.page-faq .faq-a .faq-link a:focus-visible {
  color: var(--signal-orange);
  border-bottom-color: var(--signal-orange);
}

@media (min-width: 720px) {
  .page-faq .faq-q {
    padding: 17px 22px 17px 24px;
    font-size: 16.5px;
  }

  .page-faq .faq-a {
    padding: 0 22px 20px 24px;
  }

  .page-faq .faq-a p {
    font-size: 15px;
  }
}

/* ================= 版本差异 ================= */
.page-faq .faq-version-lede {
  margin: 0 0 clamp(20px, 2.8vw, 28px);
  max-width: 660px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist-grey);
}

.page-faq .faq-compare {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: clamp(18px, 2.6vw, 24px);
}

@media (min-width: 760px) {
  .page-faq .faq-compare {
    grid-template-columns: 1fr 1fr;
    gap: 18px;
  }
}

.page-faq .faq-compare-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 20px 20px 18px;
  border: var(--edge);
  border-top: 2px solid var(--track-green);
  border-radius: var(--radius-md);
  background: var(--faq-card-bg);
}

.page-faq .faq-compare-card--alt {
  border-top-color: var(--signal-orange);
}

.page-faq .faq-compare-label {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--chalk-white);
}

.page-faq .faq-compare-list {
  flex: 1;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-compare-list li {
  position: relative;
  padding-left: 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist-grey);
}

.page-faq .faq-compare-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--line-blue);
}

.page-faq .faq-cmp-k {
  display: block;
  margin-bottom: 2px;
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--track-green);
}

.page-faq .faq-compare-card--alt .faq-cmp-k {
  color: var(--orange-glow);
}

.page-faq .faq-compare-link {
  align-self: flex-start;
  font-size: 14px;
  color: var(--orange-glow);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 138, 76, .35);
  padding-bottom: 2px;
  transition: color .18s ease, border-color .18s ease;
}

.page-faq .faq-compare-link:hover,
.page-faq .faq-compare-link:focus-visible {
  color: var(--signal-orange);
  border-bottom-color: var(--signal-orange);
}

.page-faq .faq-version-note {
  margin: 0 0 clamp(20px, 2.8vw, 28px);
  padding: 14px 16px;
  border-left: 3px solid var(--signal-orange);
  border-radius: var(--radius-sm);
  background: var(--faq-key-bg);
  font-size: 14px;
  line-height: 1.8;
  color: var(--chalk-white);
}

.page-faq .faq-figure {
  margin: clamp(20px, 3vw, 30px) 0;
  border: var(--edge);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(150deg, rgba(11, 59, 46, .55), rgba(5, 8, 15, .92) 72%);
}

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

.page-faq .faq-figure-cap {
  margin: 0;
  padding: 12px 18px 14px;
  border-top: var(--edge-soft);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist-grey);
}

.page-faq .faq-timeline {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0;
  padding: 0 0 0 20px;
  border-left: var(--edge-soft);
  display: grid;
  gap: 14px;
}

.page-faq .faq-timeline li {
  position: relative;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist-grey);
}

.page-faq .faq-timeline li::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--track-green);
  box-shadow: 0 0 0 3px rgba(23, 208, 138, .14);
}

.page-faq .faq-timeline li:last-child::before {
  background: var(--signal-orange);
  box-shadow: 0 0 0 3px rgba(255, 90, 31, .18);
}

.page-faq .faq-year {
  display: inline-block;
  margin-right: 10px;
  font-size: 14px;
  font-weight: 700;
  color: var(--chalk-white);
}

/* ================= 人工帮助 ================= */
.page-faq .faq-help-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 760px) {
  .page-faq .faq-help-panel {
    grid-template-columns: 1fr 1fr;
    gap: 18px;
  }
}

.page-faq .faq-help-item {
  padding: 20px;
  border: var(--edge);
  border-radius: var(--radius-md);
  background: var(--faq-card-bg);
}

.page-faq .faq-help-label {
  margin: 0 0 8px;
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--track-green);
}

.page-faq .faq-help-value {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.6vw, 17px);
  font-weight: 700;
  color: var(--chalk-white);
  word-break: break-all;
}

.page-faq .faq-help-desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--mist-grey);
}

.page-faq .faq-help-tip {
  margin: clamp(18px, 2.4vw, 24px) 0 clamp(18px, 2.4vw, 24px);
  padding: 16px 18px;
  border-left: 3px solid var(--signal-orange);
  border-radius: var(--radius-sm);
  background: var(--faq-key-bg);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--chalk-white);
}

.page-faq .faq-help-cta {
  margin: 0;
}

.page-faq .faq-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 999px;
  background: var(--signal-orange);
  color: var(--ink-on-orange);
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  transition: background .2s ease, transform .2s ease;
}

.page-faq .faq-cta:hover {
  background: var(--orange-glow);
  transform: translateY(-1px);
}

.page-faq .faq-cta:focus-visible {
  outline: 2px solid var(--live-cyan);
  outline-offset: 3px;
}

/* ================= 降级动效 ================= */
@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
}