.page-faq{
  --faq-gap: clamp(44px, 7vw, 88px);
  --faq-tint: rgba(63, 242, 214, .08);
  --faq-tint-strong: rgba(63, 242, 214, .32);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq .faq-band{
  padding-block: var(--faq-gap);
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero{
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-top: clamp(20px, 4vw, 44px);
  padding-bottom: clamp(8px, 3vw, 28px);
}
.page-faq .faq-hero::before{
  content: "";
  position: absolute;
  z-index: -1;
  inset: -12% -14% 8% -14%;
  background:
    linear-gradient(112deg, transparent 48%, rgba(74, 30, 43, .62) 48.2%, rgba(74, 30, 43, .62) 74%, transparent 74.2%),
    radial-gradient(85% 62% at 88% 4%, rgba(63, 242, 214, .16), transparent 62%);
  pointer-events: none;
}
.page-faq .faq-hero__title{
  margin: 12px 0 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-size: clamp(29px, 6.6vw, 56px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: .01em;
  color: var(--ice);
}
.page-faq .faq-hero__lede{
  margin: 20px 0 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--ice);
  opacity: .88;
}
.page-faq .faq-hero__facts{
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-hero__facts li{
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
  letter-spacing: .02em;
  color: var(--mist);
}
.page-faq .faq-hero__facts .num{
  font-size: 23px;
  color: var(--cyan);
  letter-spacing: -.02em;
}
.page-faq .faq-hero__figure{
  margin: clamp(28px, 5vw, 52px) 0 0;
}

/* ---------- 章节抬头 ---------- */
.page-faq .faq-sec-head{
  max-width: 64ch;
  margin-bottom: clamp(24px, 4vw, 42px);
}
.page-faq .faq-sec-head__title{
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(23px, 3.8vw, 38px);
  font-weight: 800;
  line-height: 1.24;
  color: var(--ice);
}
.page-faq .faq-sec-head__note{
  margin: 14px 0 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mist);
}
.page-faq .faq-sec-head--split{
  display: grid;
  gap: 24px;
  max-width: none;
}
.page-faq .faq-sec-head__aside{
  margin: 0;
  max-width: 420px;
}

/* ---------- 四步路径 ---------- */
.page-faq .steprail{
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-faq .steprail::before{
  content: "";
  position: absolute;
  left: 15px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(63, 242, 214, .22) 68%, rgba(63, 242, 214, 0) 100%);
}
.page-faq .steprail__item{
  position: relative;
  padding-left: 52px;
}
.page-faq .step{
  border-bottom: 1px dashed var(--hair);
  transition: background .2s ease, box-shadow .2s ease;
}
.page-faq .step[open]{
  background: linear-gradient(90deg, var(--faq-tint), rgba(63, 242, 214, 0) 72%);
  box-shadow: inset 2px 0 0 var(--cyan);
}
.page-faq .step__summary{
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 20px 0 18px;
  list-style: none;
  cursor: pointer;
  color: var(--ice);
}
.page-faq .step__summary::-webkit-details-marker{ display: none; }
.page-faq .step__summary::marker{ content: ""; }
.page-faq .step__num{
  position: absolute;
  left: 0;
  top: 20px;
  padding: 2px 6px 2px 0;
  background: var(--ink);
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -.03em;
  color: var(--mist);
}
.page-faq .step[open] .step__num{ color: var(--orange); }
.page-faq .step__label{ display: block; }
.page-faq .step__title{
  display: block;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.5vw, 26px);
  font-weight: 700;
  line-height: 1.3;
}
.page-faq .step[open] .step__title{ color: var(--cyan); }
.page-faq .step__hint{
  display: block;
  margin-top: 6px;
  font-size: 13.5px;
  letter-spacing: .03em;
  color: var(--mist);
}
.page-faq .step__body{ padding: 0 0 24px; }
.page-faq .step__body p{
  margin: 0 0 12px;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ice);
  opacity: .9;
}
.page-faq .step__body p.step__see{
  margin-bottom: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
  opacity: 1;
}
.page-faq .step__see-key{
  display: inline-block;
  margin-right: 8px;
  padding: 2px 7px;
  border: 1px solid rgba(63, 242, 214, .45);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--cyan);
}
.page-faq .step__body a{
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 主题分段 ---------- */
.page-faq .faq-tabs__list{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0 0 clamp(22px, 3vw, 32px);
  padding: 0;
  border: 0;
}
.page-faq .theme-card{
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 16px 15px;
  border: 2px solid var(--hair);
  border-left: 3px solid rgba(63, 242, 214, .5);
  background: var(--panel);
  box-shadow: var(--hard-shadow-sm);
  color: var(--ice);
  font-family: var(--font-sans);
  font-size: 15.5px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  appearance: none;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}
.page-faq .theme-card:nth-child(3n+2){ border-left-color: rgba(233, 196, 106, .7); }
.page-faq .theme-card:nth-child(3n+3){ border-left-color: rgba(255, 122, 47, .7); }
.page-faq .theme-card:hover{
  transform: translate(-2px, -2px);
  border-color: var(--hair-strong);
}
.page-faq .theme-card[aria-selected="true"]{
  border-color: var(--cyan);
  background: var(--panel-2);
  box-shadow: var(--hard-shadow-sm), inset 0 0 0 2px var(--faq-tint-strong);
}
.page-faq .theme-card__name{ letter-spacing: .02em; }
.page-faq .theme-card__count{
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--mist);
}
.page-faq .theme-card[aria-selected="true"] .theme-card__count{ color: var(--orange); }

.page-faq .faq-panels{ margin-top: clamp(16px, 3vw, 28px); }
.page-faq .tabs__panel{
  padding-top: 18px;
  border-top: 2px solid var(--hair-strong);
}
.page-faq .panel__head{
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 4px;
}
.page-faq .panel__name{
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.8vw, 27px);
  font-weight: 700;
  color: var(--ice);
}
.page-faq .panel__count{
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--orange);
}
.page-faq .panel__note{
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 折叠问答条目 ---------- */
.page-faq .faq-list{
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-list__item{
  border-bottom: 1px solid var(--hair);
}
.page-faq .qa__summary{
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 0;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.62;
  color: var(--ice);
}
.page-faq .qa__summary::-webkit-details-marker{ display: none; }
.page-faq .qa__summary::marker{ content: ""; }
.page-faq .faq-list__item details[open] .qa__summary{ color: var(--cyan); }
.page-faq .qa__mark{
  flex: none;
  margin-top: 3px;
  padding: 2px 5px;
  border: 1px solid rgba(63, 242, 214, .45);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  color: var(--cyan);
}
.page-faq .qa__body{
  max-width: 62ch;
  padding: 0 0 18px 42px;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--mist);
}
.page-faq .qa__body a{
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 账号与数据 ---------- */
.page-faq .faq-split{
  display: grid;
  gap: clamp(22px, 4vw, 48px);
}
.page-faq .faq-split__intro .faq-sec-head__note{ margin-top: 16px; }
.page-faq .faq-split__intro .btn{ margin-top: 26px; }
.page-faq .faq-ledger{
  margin: 0;
  border: 2px solid var(--hair-strong);
  background: var(--panel);
  box-shadow: var(--hard-shadow);
}
.page-faq .faq-ledger__row{
  display: grid;
  gap: 7px;
  padding: 17px 18px;
  border-bottom: 1px solid var(--hair);
}
.page-faq .faq-ledger__row:last-child{ border-bottom: 0; }
.page-faq .faq-ledger dt{
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .07em;
  color: var(--mist);
}
.page-faq .faq-ledger dd{
  margin: 0;
  font-size: 16.5px;
  line-height: 1.7;
  color: var(--ice);
}
.page-faq .faq-ledger dd .num{
  font-size: 20px;
  color: var(--orange);
}

/* ---------- 安装与设备 ---------- */
.page-faq .faq-stats{
  display: grid;
  gap: 16px;
}
.page-faq .stat{
  position: relative;
  padding: 22px 20px;
  border: 2px solid var(--hair-strong);
  background: var(--panel);
  box-shadow: var(--hard-shadow-sm);
}
.page-faq .stat::after{
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), rgba(63, 242, 214, 0));
}
.page-faq .stat:nth-child(2)::after{ background: linear-gradient(90deg, var(--amber), rgba(233, 196, 106, 0)); }
.page-faq .stat:nth-child(3)::after{ background: linear-gradient(90deg, var(--orange), rgba(255, 122, 47, 0)); }
.page-faq .stat__num{
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.4vw, 42px);
  font-weight: 600;
  letter-spacing: -.03em;
  color: var(--cyan);
}
.page-faq .stat__num span{
  margin-left: .28em;
  font-size: .46em;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--mist);
}
.page-faq .stat__label{
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 排查顺序 ---------- */
.page-faq .faq-check{
  counter-reset: chk;
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-check li{
  position: relative;
  counter-increment: chk;
  padding: 18px 18px 18px 58px;
  border: 2px solid var(--hair);
  background: rgba(22, 35, 63, .62);
}
.page-faq .faq-check li::before{
  content: counter(chk, decimal-leading-zero);
  position: absolute;
  left: 16px;
  top: 18px;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: -.02em;
  color: var(--orange);
}
.page-faq .faq-check strong{
  display: block;
  margin-bottom: 7px;
  font-size: 16.5px;
  font-weight: 700;
  color: var(--ice);
}
.page-faq .faq-check p{
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 联系 ---------- */
.page-faq .faq-help{
  display: grid;
  gap: 26px;
  padding: clamp(24px, 4.4vw, 46px);
  border: 2px solid rgba(233, 196, 106, .4);
  background: linear-gradient(158deg, rgba(74, 30, 43, .9) 0%, rgba(10, 22, 38, .94) 74%);
  box-shadow: var(--hard-shadow);
}
.page-faq .faq-help .faq-sec-head__title{ margin-top: 10px; }
.page-faq .faq-help__note{
  margin: 16px 0 26px;
  max-width: 46ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--ice);
  opacity: .88;
}
.page-faq .faq-help__list{
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-help__list li{
  display: grid;
  gap: 5px;
  padding-bottom: 14px;
  border-bottom: 1px dashed rgba(155, 176, 198, .3);
}
.page-faq .faq-help__list li:last-child{ border-bottom: 0; padding-bottom: 0; }
.page-faq .faq-help__key{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .09em;
  color: var(--mist);
}
.page-faq .faq-help__val{
  font-size: 16.5px;
  line-height: 1.7;
  color: var(--ice);
  word-break: break-word;
}
.page-faq .faq-help__val a{
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 242, 214, .45);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px){
  .page-faq .qa__summary{ padding: 16px 0; }
}

@media (min-width: 760px){
  .page-faq .faq-tabs__list{
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 12px;
  }
  .page-faq .theme-card:nth-child(1){ grid-column: span 4; }
  .page-faq .theme-card:nth-child(2){ grid-column: span 2; }
  .page-faq .theme-card:nth-child(3),
  .page-faq .theme-card:nth-child(4),
  .page-faq .theme-card:nth-child(5){ grid-column: span 2; }
  .page-faq .theme-card:nth-child(6),
  .page-faq .theme-card:nth-child(7){ grid-column: span 3; }
  .page-faq .theme-card:nth-child(8){ grid-column: span 2; }
  .page-faq .theme-card:nth-child(9){ grid-column: span 4; }
  .page-faq .faq-stats{ grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
  .page-faq .faq-ledger__row{
    grid-template-columns: minmax(150px, 5fr) 7fr;
    align-items: baseline;
    gap: 18px;
  }
}

@media (min-width: 900px){
  .page-faq .faq-sec-head--split{
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: clamp(28px, 4vw, 60px);
  }
  .page-faq .faq-sec-head__aside{ justify-self: end; width: 100%; }
  .page-faq .faq-split{
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
  .page-faq .faq-help{
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }
  .page-faq .steprail__item{ padding-left: 66px; }
  .page-faq .step__num{ font-size: 26px; }
}

@media (min-width: 1080px){
  .page-faq .faq-hero__figure{ margin-top: 56px; }
}
<<<END>>>