.page-faq {
  --faq-accent: var(--blue);
  background:
    radial-gradient(900px 420px at 86% -8%, rgba(55, 198, 255, .13), transparent 62%),
    radial-gradient(700px 400px at 6% 10%, rgba(255, 210, 63, .07), transparent 60%),
    linear-gradient(180deg, var(--night) 0%, #07100C 70%, var(--night) 100%);
  color: var(--chalk);
  padding-bottom: clamp(3rem, 8vw, 5.5rem);
  overflow-x: hidden;
}

/* ---------- 封面 ---------- */
.page-faq .faq-cover {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.6rem);
  padding-top: clamp(1.2rem, 3vw, 2rem);
  padding-bottom: clamp(2rem, 5vw, 3.2rem);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-cover__kicker {
  margin: 0 0 .9rem;
  font-family: var(--font-label);
  font-size: .8125rem;
  letter-spacing: .18em;
  color: var(--blue);
}

.page-faq .faq-cover__title {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 7.2vw, 3.9rem);
  line-height: 1.06;
  letter-spacing: .01em;
  color: var(--chalk);
}

.page-faq .faq-cover__title em {
  font-style: normal;
  color: var(--yellow);
}

.page-faq .faq-cover__lede {
  margin: 0 0 1.6rem;
  max-width: 34em;
  font-family: var(--font-serif);
  font-size: clamp(1rem, 2.2vw, 1.1875rem);
  line-height: 1.78;
  color: rgba(237, 244, 238, .84);
}

.page-faq .faq-cover__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

.page-faq .faq-cover__panel {
  align-self: start;
  padding: clamp(1rem, 3vw, 1.4rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(158deg, rgba(18, 50, 31, .95), rgba(10, 23, 18, .82));
  box-shadow: var(--shadow-card);
}

.page-faq .faq-cover__stat {
  display: flex;
  align-items: baseline;
  gap: .75rem;
  padding: .72rem .2rem;
  border-bottom: 1px dashed var(--line-soft);
}

.page-faq .faq-cover__stat:last-child {
  border-bottom: 0;
  padding-bottom: .2rem;
}

.page-faq .faq-cover__num {
  min-width: 3.1rem;
  font-family: var(--font-numeric);
  font-weight: 600;
  font-size: 1.7rem;
  color: var(--yellow);
}

.page-faq .faq-cover__cap {
  font-size: .875rem;
  color: var(--mist);
}

/* ---------- 页面主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(1.8rem, 4vw, 3rem);
  padding-top: clamp(1.6rem, 4vw, 2.6rem);
}

.page-faq .faq-main {
  display: grid;
  gap: clamp(2.2rem, 6vw, 3.6rem);
  min-width: 0;
}

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

/* ---------- 四类问题 ---------- */
.page-faq .faq-cats {
  display: grid;
  gap: 1rem;
  min-width: 0;
}

.page-faq .faq-cat {
  --cat: var(--blue);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .6rem;
  padding: 1.5rem 1.15rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(18, 50, 31, .9), rgba(10, 23, 18, .72));
  color: var(--chalk);
  text-decoration: none;
  overflow: hidden;
  transition: transform .3s var(--ease), border-color .3s var(--ease);
}

.page-faq .faq-cat::after {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--cat), rgba(10, 23, 18, 0));
}

.page-faq .faq-cat:hover,
.page-faq .faq-cat:focus-visible {
  transform: translateY(-4px);
  border-color: var(--cat);
}

.page-faq .faq-cat--blue { --cat: var(--blue); }
.page-faq .faq-cat--yellow { --cat: var(--yellow); }
.page-faq .faq-cat--red { --cat: var(--red); }
.page-faq .faq-cat--grass { --cat: var(--grass); }

.page-faq .faq-cat__tag {
  align-self: flex-start;
  padding: .2rem .7rem;
  border-radius: var(--pill);
  font-family: var(--font-label);
  font-size: .75rem;
  letter-spacing: .1em;
  color: var(--night);
  background: var(--cat);
}

.page-faq .faq-cat--red .faq-cat__tag { color: var(--paper); }
.page-faq .faq-cat--grass .faq-cat__tag { color: var(--chalk); }

.page-faq .faq-cat__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.1875rem;
  line-height: 1.4;
  color: var(--chalk);
}

.page-faq .faq-cat__desc {
  margin: 0;
  font-size: .875rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-cat__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .35rem;
  font-size: .8125rem;
  line-height: 1.6;
  color: rgba(237, 244, 238, .78);
}

.page-faq .faq-cat__list li {
  position: relative;
  padding-left: .95rem;
}

.page-faq .faq-cat__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .58em;
  width: .34rem;
  height: .34rem;
  border-radius: 50%;
  background: var(--cat);
}

.page-faq .faq-cat__more {
  margin-top: auto;
  padding-top: .5rem;
  font-size: .8125rem;
  letter-spacing: .04em;
  color: var(--cat);
}

/* ---------- 章节 ---------- */
.page-faq .faq-sec {
  position: relative;
  counter-reset: faqq;
  padding-top: clamp(1.2rem, 3vw, 1.8rem);
  min-width: 0;
}

.page-faq .faq-sec::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 72px;
  height: 3px;
  border-radius: var(--pill);
  background: var(--faq-accent);
}

.page-faq .faq-sec--install { --faq-accent: var(--blue); }
.page-faq .faq-sec--play { --faq-accent: var(--yellow); }
.page-faq .faq-sec--data { --faq-accent: var(--red); }
.page-faq .faq-sec--chat { --faq-accent: var(--grass); }
.page-faq .faq-sec--help { --faq-accent: var(--blue); }

.page-faq .faq-list {
  display: grid;
  gap: .7rem;
  min-width: 0;
}

/* ---------- 问答折页 ---------- */
.page-faq .faq-q {
  counter-increment: faqq;
  border: 1px solid rgba(16, 22, 19, .1);
  border-radius: var(--radius-md);
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 18px 32px -28px rgba(0, 0, 0, .95);
  transition: box-shadow .3s var(--ease), border-color .3s var(--ease);
}

.page-faq .faq-q[open] {
  border-color: rgba(55, 198, 255, .55);
  box-shadow: 0 24px 42px -30px rgba(55, 198, 255, .6);
}

.page-faq .faq-q__head {
  display: flex;
  align-items: flex-start;
  gap: .8rem;
  padding: 1.05rem 1.1rem;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-q__head::before {
  content: counter(faqq, decimal-leading-zero);
  flex: 0 0 auto;
  min-width: 1.7rem;
  padding-top: .28rem;
  font-family: var(--font-numeric);
  font-size: .8125rem;
  color: var(--faq-accent);
}

.page-faq .faq-q__text {
  flex: 1 1 auto;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(.98rem, 2vw, 1.0625rem);
  line-height: 1.55;
  color: var(--ink);
}

.page-faq .faq-q__mark {
  position: relative;
  flex: 0 0 auto;
  width: 1.4rem;
  height: 1.4rem;
  margin-top: .12rem;
  border: 1px solid rgba(16, 22, 19, .28);
  border-radius: 50%;
  transition: border-color .25s var(--ease);
}

.page-faq .faq-q__mark::before,
.page-faq .faq-q__mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius: var(--pill);
  background: var(--ink);
  transform: translate(-50%, -50%);
  transition: transform .25s var(--ease), opacity .25s var(--ease);
}

.page-faq .faq-q__mark::before { width: .68rem; height: 2px; }
.page-faq .faq-q__mark::after { width: 2px; height: .68rem; }

.page-faq .faq-q[open] .faq-q__mark { border-color: var(--blue); }
.page-faq .faq-q[open] .faq-q__mark::after { transform: translate(-50%, -50%) scaleY(0); opacity: 0; }

.page-faq .faq-q__body {
  padding: 0 1.1rem 1.15rem;
}

.page-faq .faq-q__body p {
  margin: 0 0 .7rem;
  font-size: .9375rem;
  line-height: 1.78;
  color: rgba(16, 22, 19, .86);
}

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

.page-faq .faq-q__body a {
  color: #0E6C93;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-faq .faq-note {
  margin: .85rem 0 0;
  padding: .7rem .9rem;
  border-left: 3px solid var(--faq-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(16, 22, 19, .06);
  font-size: .875rem;
  line-height: 1.72;
  color: rgba(16, 22, 19, .8);
}

/* ---------- 编号步骤 ---------- */
.page-faq .faq-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
  display: grid;
  gap: .55rem;
}

.page-faq .faq-steps li {
  position: relative;
  counter-increment: step;
  padding-left: 2.2rem;
  font-size: .9375rem;
  line-height: 1.75;
  color: rgba(16, 22, 19, .88);
}

.page-faq .faq-steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: .16rem;
  display: grid;
  place-items: center;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: var(--yellow);
  color: var(--ink);
  font-family: var(--font-numeric);
  font-size: .75rem;
  font-weight: 600;
}

.page-faq .faq-steps li::after {
  content: "";
  position: absolute;
  left: .74rem;
  top: 1.78rem;
  bottom: -.62rem;
  width: 1px;
  background: rgba(16, 22, 19, .2);
}

.page-faq .faq-steps li:last-child::after { display: none; }

/* ---------- 数据栏 ---------- */
.page-faq .faq-meters {
  display: grid;
  gap: .6rem;
  margin: 0 0 1.4rem;
}

.page-faq .faq-meter {
  display: grid;
  gap: .25rem;
  padding: .9rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(160deg, rgba(18, 50, 31, .85), rgba(10, 23, 18, .7));
}

.page-faq .faq-meter__k {
  font-family: var(--font-label);
  font-size: .75rem;
  letter-spacing: .12em;
  color: var(--mist);
}

.page-faq .faq-meter__v {
  font-family: var(--font-numeric);
  font-size: 1.05rem;
  color: var(--chalk);
}

.page-faq .faq-meter__n {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--yellow);
}

/* ---------- 求助通道 ---------- */
.page-faq .faq-helps {
  display: grid;
  gap: .9rem;
  margin-bottom: 1.4rem;
}

.page-faq .faq-help {
  padding: 1.25rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(170deg, rgba(18, 50, 31, .9), rgba(10, 23, 18, .74));
}

.page-faq .faq-help__title {
  margin: 0 0 .6rem;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.125rem;
  line-height: 1.4;
  color: var(--chalk);
}

.page-faq .faq-help__text {
  margin: 0 0 .6rem;
  font-size: .9375rem;
  line-height: 1.75;
  color: rgba(237, 244, 238, .84);
}

.page-faq .faq-help__strong {
  font-family: var(--font-numeric);
  font-size: 1rem;
  color: var(--blue);
  word-break: break-all;
}

.page-faq .faq-help__meta {
  margin: 0;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-tips {
  padding: clamp(1.2rem, 3vw, 1.8rem);
  margin-bottom: 1.4rem;
}

.page-faq .faq-tips__title {
  margin: 0 0 1rem;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.125rem;
  line-height: 1.45;
  color: var(--ink);
}

.page-faq .faq-more {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-faq .faq-q__body { padding-left: 3.6rem; }
  .page-faq .faq-cats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-faq .faq-helps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-faq .faq-meters { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 960px) {
  .page-faq .faq-cover {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .85fr);
    align-items: end;
  }
  .page-faq .faq-cover__panel { margin-bottom: .4rem; }
  .page-faq .faq-helps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 1080px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) 188px;
    align-items: start;
  }
  .page-faq .faq-cats { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .page-faq .faq-rail {
    display: grid;
    gap: .1rem;
    position: sticky;
    top: 7.5rem;
    align-content: start;
    padding-left: 1rem;
    border-left: 1px solid var(--line-soft);
  }
}

.page-faq .faq-rail__head {
  margin: 0 0 .6rem;
  font-family: var(--font-label);
  font-size: .75rem;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-faq .faq-rail__item {
  position: relative;
  display: block;
  padding: .45rem 0 .45rem 1rem;
  font-size: .875rem;
  line-height: 1.4;
  color: rgba(237, 244, 238, .72);
  text-decoration: none;
  transition: color .22s var(--ease);
}

.page-faq .faq-rail__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: .5rem;
  bottom: .5rem;
  width: 2px;
  border-radius: var(--pill);
  background: var(--line-soft);
  transition: background .22s var(--ease), transform .22s var(--ease);
}

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

.page-faq .faq-rail__item:hover::before,
.page-faq .faq-rail__item:focus-visible::before {
  background: var(--blue);
  transform: scaleX(2);
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-cat,
  .page-faq .faq-q,
  .page-faq .faq-q__mark,
  .page-faq .faq-q__mark::before,
  .page-faq .faq-q__mark::after,
  .page-faq .faq-rail__item,
  .page-faq .faq-rail__item::before {
    transition: none;
  }
  .page-faq .faq-cat:hover { transform: none; }
}