.page-faq {
  --faq-line: rgba(16, 200, 165, .18);
  --faq-line-soft: rgba(124, 242, 196, .12);
  --faq-panel: rgba(14, 59, 58, .5);
  --faq-gap: clamp(56px, 8vw, 104px);
  background: var(--ink-900);
  color: var(--on-dark);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
  padding-bottom: 24px;
}

@media (min-width: 768px) {
  .page-faq { font-size: 17px; }
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: clamp(22px, 5vw, 52px) 0 clamp(26px, 4vw, 44px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -30px;
  right: -12%;
  width: min(640px, 78%);
  height: 250px;
  background: linear-gradient(122deg, rgba(16, 200, 165, .18) 0%, rgba(255, 122, 26, .07) 58%, rgba(6, 26, 31, 0) 100%);
  clip-path: polygon(20% 0, 100% 0, 100% 76%, 0 100%);
  pointer-events: none;
  z-index: 0;
}

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

.page-faq .faq-hero h1 {
  position: relative;
  margin: 14px 0 0;
  padding-left: 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 5.4vw, 50px);
  line-height: 1.18;
  letter-spacing: -.01em;
  color: var(--on-dark);
}

.page-faq .faq-hero h1::before {
  content: "";
  position: absolute;
  left: 0;
  top: .16em;
  width: 4px;
  height: .92em;
  background: var(--brand);
  clip-path: polygon(0 0, 100% 8%, 100% 100%, 0 92%);
}

.page-faq .faq-hero-lead {
  margin: 20px 0 0;
  max-width: 64ch;
  font-size: clamp(15.5px, 1.9vw, 18px);
  line-height: 1.78;
  color: rgba(234, 246, 242, .86);
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 本页目录 ---------- */

.page-faq .faq-toc {
  margin-top: 34px;
  padding: 20px 0;
  border-top: 1px solid var(--faq-line);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-toc-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--brand-soft);
}

/* ---------- 章节 ---------- */

.page-faq .faq-block {
  margin-top: var(--faq-gap);
}

.page-faq .faq-toc + .faq-block {
  margin-top: 48px;
}

/* ---------- 三步走 ---------- */

.page-faq .steps-track {
  position: relative;
  margin-top: 34px;
}

.page-faq .steps-rail {
  display: none;
}

.page-faq .steps-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 30px;
  counter-reset: none;
}

.page-faq .step {
  position: relative;
  padding: 22px 0 0;
  border-top: 1px solid var(--faq-line);
}

.page-faq .step-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 36px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--brand);
  margin-bottom: 12px;
}

.page-faq .step-title {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--on-dark);
}

.page-faq .step-text {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(234, 246, 242, .8);
}

.page-faq .step-link {
  display: inline-block;
  font-size: 14px;
  color: var(--brand);
  text-decoration: none;
  border-bottom: 1px solid rgba(16, 200, 165, .4);
  padding-bottom: 1px;
  transition: color .18s ease, border-color .18s ease;
}

.page-faq .step-link:hover,
.page-faq .step-link:focus-visible {
  color: var(--brand-soft);
  border-bottom-color: var(--brand-soft);
}

@media (min-width: 900px) {
  .page-faq .steps-track { margin-top: 42px; }

  .page-faq .steps-rail {
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    color: var(--brand-soft);
    opacity: .3;
    pointer-events: none;
  }

  .page-faq .steps-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 36px;
  }

  .page-faq .step { padding-top: 26px; }
}

/* ---------- 图文分栏 ---------- */

.page-faq .faq-split {
  display: grid;
  gap: 26px;
  margin-top: 30px;
}

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

.page-faq .faq-figure {
  order: -1;
  margin: 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--faq-line);
  background: var(--ink-800);
}

.page-faq .faq-figure figcaption {
  margin-top: 12px;
  padding-left: 12px;
  border-left: 2px solid var(--brand-soft);
  font-size: 14px;
  line-height: 1.62;
  color: rgba(234, 246, 242, .68);
}

@media (min-width: 960px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 54px;
    align-items: start;
  }

  .page-faq .faq-split .faq-figure {
    order: 0;
  }
}

/* ---------- PC 端编号步骤 ---------- */

.page-faq .do-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: dstep;
  display: grid;
  gap: 20px;
}

.page-faq .do-steps > li {
  position: relative;
  padding-left: 56px;
  min-height: 42px;
}

.page-faq .do-steps > li::before {
  counter-increment: dstep;
  content: "0" counter(dstep);
  position: absolute;
  left: 0;
  top: 2px;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  font-weight: 700;
  color: var(--data);
  border: 1px solid rgba(255, 210, 51, .45);
  border-radius: var(--radius);
  background: rgba(255, 210, 51, .06);
}

.page-faq .do-steps h3 {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--on-dark);
}

.page-faq .do-steps p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(234, 246, 242, .8);
}

.page-faq .faq-aside {
  margin: 26px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--live);
  background: rgba(255, 122, 26, .07);
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(234, 246, 242, .86);
}

/* ---------- 移动端要点 ---------- */

.page-faq .tip-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-faq .tip-list li {
  position: relative;
  padding-left: 22px;
}

.page-faq .tip-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .58em;
  width: 10px;
  height: 10px;
  background: var(--brand);
  clip-path: polygon(0 0, 100% 22%, 100% 100%, 0 78%);
}

.page-faq .tip-list strong {
  display: block;
  margin-bottom: 4px;
  font-size: 16px;
  font-weight: 700;
  color: var(--on-dark);
}

.page-faq .tip-list span {
  display: block;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(234, 246, 242, .8);
}

/* ---------- 指标表 ---------- */

.page-faq .metric-wrap {
  margin-top: 30px;
}

.page-faq .metric-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.page-faq .metric-table thead th {
  text-align: left;
  padding: 12px 14px;
  background: var(--ink-800);
  color: var(--brand-soft);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .metric-table tbody th,
.page-faq .metric-table tbody td {
  text-align: left;
  padding: 16px 14px;
  border-bottom: 1px solid var(--faq-line-soft);
  vertical-align: top;
  line-height: 1.66;
}

.page-faq .metric-table tbody tr:nth-child(odd) {
  background: rgba(14, 59, 58, .42);
}

.page-faq .metric-table tbody tr:hover,
.page-faq .metric-table tbody tr:focus-within {
  position: relative;
  z-index: 3;
}

.page-faq .metric-table tbody th {
  font-weight: 700;
  color: var(--on-dark);
  white-space: nowrap;
}

.page-faq .metric-table tbody td {
  color: rgba(234, 246, 242, .82);
}

.page-faq .metric-term {
  position: relative;
  display: inline-block;
  border-bottom: 1px dashed rgba(16, 200, 165, .7);
  cursor: help;
}

.page-faq .metric-tip {
  position: absolute;
  left: 0;
  top: calc(100% + 8px);
  width: max-content;
  max-width: min(260px, 68vw);
  padding: 9px 11px;
  background: var(--ink-800);
  color: var(--on-dark);
  border: 1px solid var(--brand);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.55;
  letter-spacing: 0;
  white-space: normal;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity .18s ease, transform .18s ease, visibility .18s;
  pointer-events: none;
  z-index: 8;
}

.page-faq .metric-term:hover .metric-tip,
.page-faq .metric-term:focus .metric-tip,
.page-faq .metric-term:focus-within .metric-tip {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

@media (max-width: 719px) {
  .page-faq .metric-table,
  .page-faq .metric-table thead,
  .page-faq .metric-table tbody,
  .page-faq .metric-table tr,
  .page-faq .metric-table th,
  .page-faq .metric-table td {
    display: block;
  }

  .page-faq .metric-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
  }

  .page-faq .metric-table tbody tr {
    padding: 14px 14px 10px;
    border-bottom: 1px solid var(--faq-line);
  }

  .page-faq .metric-table tbody th,
  .page-faq .metric-table tbody td {
    border-bottom: 0;
    padding: 6px 0;
    white-space: normal;
  }

  .page-faq .metric-table tbody th::before,
  .page-faq .metric-table tbody td::before {
    content: attr(data-label);
    display: block;
    margin-bottom: 3px;
    font-size: 11px;
    letter-spacing: .1em;
    color: var(--brand-soft);
  }
}

.page-faq .metric-notes {
  margin-top: 22px;
  display: grid;
  gap: 12px;
}

.page-faq .metric-notes p {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: rgba(234, 246, 242, .8);
}

.page-faq .metric-notes strong {
  color: var(--data);
  font-weight: 700;
}

/* ---------- 问答分组 ---------- */

.page-faq .faq-group {
  margin-top: 30px;
  padding: 2px 16px 12px;
  border-top: 2px solid var(--group-accent, var(--brand));
  background: linear-gradient(180deg, var(--group-bg, rgba(16, 200, 165, .06)) 0%, rgba(6, 26, 31, 0) 64%);
}

.page-faq .faq-group--schedule {
  --group-accent: var(--brand);
  --group-bg: rgba(16, 200, 165, .07);
}

.page-faq .faq-group--replay {
  --group-accent: var(--live);
  --group-bg: rgba(255, 122, 26, .07);
}

.page-faq .faq-group--number {
  --group-accent: var(--data);
  --group-bg: rgba(255, 210, 51, .06);
}

.page-faq .faq-group--display {
  --group-accent: var(--clay);
  --group-bg: rgba(201, 106, 63, .09);
}

.page-faq .faq-group-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 16px 0 10px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--on-dark);
}

.page-faq .faq-group-title::before {
  content: "";
  flex: none;
  width: 10px;
  height: 10px;
  background: var(--group-accent, var(--brand));
  clip-path: polygon(0 0, 100% 22%, 100% 100%, 0 78%);
}

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

.page-faq .qa-q {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 16px 42px 16px 0;
  border-left: 3px solid transparent;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--on-dark);
  list-style: none;
  transition: border-color .18s ease, color .18s ease, padding-left .18s ease;
}

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

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

.page-faq .qa-q::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--brand-soft);
}

.page-faq .qa-q:hover {
  color: var(--brand-soft);
}

.page-faq .qa[open] .qa-q {
  border-left-color: var(--brand);
  padding-left: 14px;
  color: var(--brand-soft);
}

.page-faq .qa[open] .qa-q::after {
  content: "−";
  color: var(--group-accent, var(--brand));
}

.page-faq .qa-a {
  padding: 0 8px 16px 14px;
  font-size: 15px;
  line-height: 1.76;
  color: rgba(234, 246, 242, .82);
}

.page-faq .qa-a p {
  margin: 0 0 10px;
}

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

.page-faq .qa-a a {
  color: var(--brand);
  border-bottom: 1px solid rgba(16, 200, 165, .4);
  text-decoration: none;
}

.page-faq .qa-a a:hover,
.page-faq .qa-a a:focus-visible {
  color: var(--brand-soft);
  border-bottom-color: var(--brand-soft);
}

/* ---------- 联系与反馈 ---------- */

.page-faq .help-grid {
  margin-top: 30px;
  display: grid;
  gap: 16px;
}

@media (min-width: 640px) {
  .page-faq .help-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-faq .help-card {
  padding: 20px 18px;
  border: 1px solid var(--faq-line);
  background: var(--faq-panel);
  box-shadow: var(--shadow-1);
}

.page-faq .help-key {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--brand-soft);
}

.page-faq .help-value {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--data);
  word-break: break-all;
}

.page-faq .help-note {
  margin: 22px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--brand);
  background: rgba(16, 200, 165, .07);
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(234, 246, 242, .86);
}

.page-faq .help-aside {
  margin-top: 22px;
  display: grid;
  gap: 12px;
}

.page-faq .help-aside p {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: rgba(234, 246, 242, .82);
}

.page-faq .help-aside a {
  color: var(--brand);
  border-bottom: 1px solid rgba(16, 200, 165, .4);
  text-decoration: none;
}

.page-faq .help-aside a:hover,
.page-faq .help-aside a:focus-visible {
  color: var(--brand-soft);
  border-bottom-color: var(--brand-soft);
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-faq .step-link,
  .page-faq .qa-q,
  .page-faq .metric-tip {
    transition: none;
  }
}
</main>