.page-faq {
  --faq-rail: 226px;
  --faq-gap: 32px;
  position: relative;
  background:
    radial-gradient(95% 62% at 92% -6%, rgba(74, 15, 28, 0.55), transparent 62%),
    var(--ma-black);
  color: var(--ma-paper);
  padding-bottom: 68px;
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq :focus-visible {
  outline: 2px solid var(--ma-mint);
  outline-offset: 2px;
}

/* ---------- 首屏 ---------- */
.faq-hero {
  padding: 28px 0 0;
}

.faq-crumb {
  margin: 0 0 22px;
}

.faq-hero__grid {
  display: grid;
  gap: 26px;
}

.faq-hero__title {
  font-family: var(--ma-font-head);
  font-size: clamp(32px, 8.4vw, 56px);
  line-height: 1.08;
  letter-spacing: 0.01em;
  margin: 12px 0 0;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--ma-red);
  max-width: 15em;
}

.faq-hero__text {
  margin: 18px 0 0;
  max-width: 38em;
  color: var(--ma-slate);
  font-size: 16px;
  line-height: 1.85;
}

.faq-brief {
  position: relative;
  background: var(--ma-panel);
  border: 1px solid var(--ma-stroke);
  padding: 22px 20px;
  overflow: hidden;
}

.faq-brief::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--ma-red-hot), rgba(214, 43, 63, 0));
}

.faq-brief__title {
  margin: 0 0 14px;
  font-family: var(--ma-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ma-mint);
}

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

.faq-brief__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--ma-stroke);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ma-slate);
}

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

.faq-brief__k {
  font-family: var(--ma-font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--ma-paper);
  white-space: nowrap;
}

/* ---------- 快捷定位 ---------- */
.faq-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--ma-stroke);
}

.faq-filter__label {
  font-family: var(--ma-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ma-slate);
  margin-right: 4px;
}

.faq-chip {
  display: inline-flex;
  align-items: center;
  padding: 7px 13px;
  border: 1px solid var(--ma-stroke);
  background: var(--ma-panel);
  color: var(--ma-paper);
  font-size: 13px;
  text-decoration: none;
  transition: border-color 0.2s var(--ma-ease), background 0.2s var(--ma-ease);
}

.faq-chip:hover,
.faq-chip:focus-visible {
  border-color: var(--ma-red-hot);
  background: var(--ma-red);
}

/* ---------- 主体布局 ---------- */
.faq-main {
  display: grid;
  gap: var(--faq-gap);
  margin-top: 44px;
}

.faq-rail {
  border-top: 1px solid var(--ma-stroke);
  padding-top: 14px;
}

.faq-rail__title {
  margin: 0 0 12px;
  font-family: var(--ma-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ma-slate);
}

.faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.faq-rail__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border: 1px solid var(--ma-stroke);
  color: var(--ma-slate);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ma-ease), border-color 0.2s var(--ma-ease), background 0.2s var(--ma-ease);
}

.faq-rail__link:hover,
.faq-rail__link:focus-visible {
  color: var(--ma-paper);
  border-color: var(--ma-red);
  background: rgba(158, 27, 47, 0.16);
}

.faq-rail__no {
  font-family: var(--ma-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--ma-red-hot);
}

/* ---------- 段落通用 ---------- */
.faq-sec + .faq-sec {
  margin-top: 52px;
  padding-top: 38px;
  border-top: 1px solid var(--ma-stroke);
}

.faq-sec__h {
  font-family: var(--ma-font-head);
  font-size: clamp(22px, 4.6vw, 30px);
  line-height: 1.28;
  letter-spacing: 0.01em;
  margin: 10px 0 14px;
}

.faq-sec__lead {
  margin: 0;
  max-width: 38em;
  color: var(--ma-slate);
  font-size: 15.5px;
  line-height: 1.85;
}

.faq-sec__lead--gap {
  margin-top: 22px;
}

.faq-inline-link {
  color: var(--ma-paper);
  text-decoration: none;
  border-bottom: 1px solid var(--ma-red-hot);
  transition: color 0.2s var(--ma-ease);
}

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

/* ---------- 步骤图解 ---------- */
.faq-steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.faq-step {
  position: relative;
  background: var(--ma-panel);
  border: 1px solid var(--ma-stroke);
  border-top: 2px solid var(--ma-red);
  padding: 20px 20px 22px;
}

.faq-step__no {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--ma-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ma-red-hot);
}

.faq-step__no::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ma-red-hot);
  box-shadow: 0 0 0 4px rgba(214, 43, 63, 0.15);
}

.faq-step__h {
  font-family: var(--ma-font-head);
  font-size: 20px;
  line-height: 1.35;
  margin: 12px 0 8px;
}

.faq-step p {
  margin: 0;
  color: var(--ma-slate);
  font-size: 14.5px;
  line-height: 1.75;
}

.faq-step__hint {
  margin-top: 14px !important;
  font-family: var(--ma-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ma-mint) !important;
}

.faq-figure {
  margin: 26px 0 0;
  border: 1px solid var(--ma-stroke);
  background: var(--ma-panel);
}

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

/* ---------- 故障排查框 ---------- */
.faq-trouble {
  margin-top: 24px;
  padding: 20px;
  background: linear-gradient(180deg, rgba(74, 15, 28, 0.6), rgba(22, 22, 27, 0.92));
  border: 1px solid var(--ma-stroke);
  border-left: 3px solid var(--ma-red);
}

.faq-trouble--soft {
  border-left-color: var(--ma-slate);
  background: var(--ma-panel);
}

.faq-trouble__title {
  margin: 0 0 14px;
  font-family: var(--ma-font-mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ma-paper);
}

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

.faq-trouble li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  color: var(--ma-slate);
  font-size: 14.5px;
  line-height: 1.75;
}

.faq-trouble li::before {
  content: "→";
  font-family: var(--ma-font-mono);
  color: var(--ma-red-hot);
}

.faq-trouble__note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--ma-stroke);
  color: var(--ma-slate);
  font-size: 14px;
  line-height: 1.75;
}

/* ---------- 数据读数条 ---------- */
.faq-readout {
  margin: 24px 0 0;
  display: grid;
  gap: 12px;
}

.faq-readout__item {
  background: var(--ma-panel);
  border: 1px solid var(--ma-stroke);
  padding: 18px;
}

.faq-readout__label {
  margin: 0;
  font-family: var(--ma-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ma-slate);
}

.faq-readout__val {
  margin: 8px 0 8px;
  font-family: var(--ma-font-display);
  font-size: 34px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ma-paper);
}

.faq-readout__desc {
  margin: 0;
  color: var(--ma-slate);
  font-size: 13.5px;
  line-height: 1.7;
}

.faq-live-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
}

.faq-live {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--ma-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ma-mint);
}

.faq-live__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ma-mint);
  animation: faqPulse 2.4s ease-in-out infinite;
}

@keyframes faqPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.42; transform: scale(0.8); }
}

.faq-live-note {
  color: var(--ma-slate);
  font-size: 13.5px;
  line-height: 1.7;
}

.faq-points {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.faq-points li {
  position: relative;
  padding-left: 18px;
  color: var(--ma-slate);
  font-size: 14.5px;
  line-height: 1.8;
}

.faq-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--ma-red-hot);
}

.faq-points strong {
  color: var(--ma-paper);
  font-weight: 600;
}

/* ---------- 字段说明 ---------- */
.faq-fields {
  margin-top: 26px;
  border-top: 1px solid var(--ma-stroke);
}

.faq-field {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--ma-stroke);
}

.faq-field__no {
  font-family: var(--ma-font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ma-red-hot);
}

.faq-field__h {
  margin: 0;
  font-family: var(--ma-font-head);
  font-size: 17px;
  line-height: 1.4;
}

.faq-field__d {
  margin: 0;
  color: var(--ma-slate);
  font-size: 14.5px;
  line-height: 1.78;
}

/* ---------- 时间线 ---------- */
.faq-timeline {
  position: relative;
  list-style: none;
  margin: 26px 0 0;
  padding: 0 0 0 22px;
}

.faq-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--ma-red-hot), rgba(74, 15, 28, 0.15));
}

.faq-moment {
  position: relative;
  padding-bottom: 22px;
}

.faq-moment:last-child {
  padding-bottom: 0;
}

.faq-moment::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 5px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ma-black);
  border: 2px solid var(--ma-red-hot);
}

.faq-moment__t {
  display: block;
  margin-bottom: 5px;
  font-family: var(--ma-font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--ma-mint);
}

.faq-moment p {
  margin: 0;
  color: var(--ma-slate);
  font-size: 14.5px;
  line-height: 1.78;
}

/* ---------- 折叠问题 ---------- */
.faq-groups {
  margin-top: 26px;
  display: grid;
  gap: 30px;
}

.faq-group__title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--ma-stroke);
  font-family: var(--ma-font-head);
  font-size: 19px;
}

.faq-group__no {
  font-family: var(--ma-font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ma-red-hot);
}

.faq-q {
  background: var(--ma-panel);
  border: 1px solid var(--ma-stroke);
  border-left: 2px solid var(--ma-stroke);
  margin-top: 10px;
  transition: border-color 0.2s var(--ma-ease);
}

.faq-q[open] {
  border-left-color: var(--ma-mint);
}

.faq-q__s {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ma-paper);
}

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

.faq-q__s::after {
  content: "+";
  flex: none;
  font-family: var(--ma-font-mono);
  font-size: 16px;
  line-height: 1.4;
  color: var(--ma-mint);
}

.faq-q[open] .faq-q__s::after {
  content: "−";
}

.faq-q__a {
  padding: 0 16px 16px;
  color: var(--ma-slate);
  font-size: 14.5px;
  line-height: 1.8;
}

.faq-q__a p {
  margin: 0;
}

.faq-q__a ol {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 7px;
}

/* ---------- 纠错提交 ---------- */
.faq-fix {
  margin-top: 24px;
  display: grid;
  gap: 16px;
}

.faq-fix__list {
  counter-reset: fix;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.faq-fix__list li {
  counter-increment: fix;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  padding: 14px 16px;
  background: var(--ma-panel);
  border: 1px solid var(--ma-stroke);
  color: var(--ma-slate);
  font-size: 14.5px;
  line-height: 1.72;
}

.faq-fix__list li::before {
  content: counter(fix, decimal-leading-zero);
  font-family: var(--ma-font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--ma-mint);
}

.faq-sidecard {
  background: var(--ma-panel-2);
  border: 1px solid var(--ma-stroke);
  border-left: 3px solid var(--ma-mint);
  padding: 20px;
}

.faq-sidecard__t {
  margin: 0 0 10px;
  font-family: var(--ma-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ma-mint);
}

.faq-sidecard p {
  margin: 0 0 10px;
  color: var(--ma-slate);
  font-size: 14.5px;
  line-height: 1.78;
}

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

/* ---------- 联系入口 ---------- */
.faq-channels {
  margin-top: 24px;
  display: grid;
  gap: 14px;
}

.faq-channel {
  background: var(--ma-panel);
  border: 1px solid var(--ma-stroke);
  padding: 20px;
}

.faq-channel__k {
  margin: 0 0 10px;
  font-family: var(--ma-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ma-slate);
}

.faq-channel__v {
  margin: 0 0 10px;
  font-family: var(--ma-font-head);
  font-size: 18px;
  line-height: 1.4;
  word-break: break-word;
}

.faq-channel p:last-child {
  margin: 0;
  color: var(--ma-slate);
  font-size: 14px;
  line-height: 1.72;
}

.faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .faq-readout {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .faq-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .faq-step:first-child::after {
    content: "";
    position: absolute;
    right: -19px;
    top: 50%;
    width: 18px;
    height: 1px;
    background: var(--ma-red);
  }
}

@media (min-width: 760px) {
  .faq-field {
    grid-template-columns: 56px minmax(150px, 186px) minmax(0, 1fr);
    align-items: baseline;
    gap: 20px;
  }
}

@media (min-width: 900px) {
  .faq-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(300px, 0.95fr);
    gap: 44px;
    align-items: end;
  }

  .faq-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 34px 30px;
  }

  .faq-fix {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 26px;
    align-items: start;
  }

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

@media (min-width: 1024px) {
  .faq-main {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .faq-rail {
    position: sticky;
    top: 104px;
    border-top: 0;
    border-left: 1px solid var(--ma-stroke);
    padding: 2px 0 8px 18px;
  }

  .faq-rail__list {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .faq-rail__link {
    border: 0;
    border-left: 2px solid transparent;
    padding: 8px 0 8px 12px;
    white-space: normal;
    line-height: 1.55;
  }

  .faq-rail__link:hover,
  .faq-rail__link:focus-visible {
    background: rgba(158, 27, 47, 0.14);
    border-left-color: var(--ma-red);
  }
}

@media (prefers-reduced-motion: reduce) {
  .faq-live__dot {
    animation: none;
  }

  .faq-chip,
  .faq-q,
  .faq-rail__link,
  .faq-inline-link {
    transition: none;
  }
}