.page-products{
  --rail-col:236px;
  --panel:rgba(14,21,51,.92);
  --hair:rgba(29,39,82,.85);
  position:relative;
  isolation:isolate;
  background-color:var(--ink-950);
  background-image:linear-gradient(180deg, rgba(14,21,51,.85) 0%, rgba(8,13,31,.2) 46%, rgba(8,13,31,1) 100%);
  color:var(--slate-300);
  overflow-x:clip;
}

.page-products .feat-mesh{
  position:absolute;
  inset:0 0 auto 0;
  height:min(900px,94vh);
  z-index:-1;
  pointer-events:none;
  background-image:
    linear-gradient(to right, rgba(29,39,82,.62) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(29,39,82,.62) 1px, transparent 1px);
  background-size:76px 76px;
  -webkit-mask-image:radial-gradient(125% 78% at 64% 0%, #000 0%, rgba(0,0,0,.28) 58%, transparent 86%);
  mask-image:radial-gradient(125% 78% at 64% 0%, #000 0%, rgba(0,0,0,.28) 58%, transparent 86%);
}

/* ---------- 首屏 ---------- */
.page-products .feat-hero{
  position:relative;
  padding:clamp(22px,3.6vw,44px) 0 clamp(30px,5vw,60px);
  border-bottom:1px solid var(--hair);
}

.page-products .feat-hero__grid{
  display:grid;
  gap:clamp(22px,3.4vw,40px);
  margin-top:clamp(18px,3vw,34px);
}

.page-products .feat-hero__lead .eyebrow{
  display:block;
  margin-bottom:14px;
}

.page-products .feat-hero__lead h1{
  font-family:var(--font-head);
  font-size:clamp(30px,7vw,var(--t-2xl));
  font-weight:300;
  line-height:1.14;
  letter-spacing:-.02em;
  color:var(--white-050);
  margin:0 0 16px;
  max-width:22ch;
}

.page-products .feat-hero__lead .lede{
  max-width:56ch;
  margin:0;
  color:var(--slate-300);
}

.page-products .feat-hero__actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:26px;
}

.page-products .feat-hero__tiles{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:12px;
}

.page-products .feat-tile{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:18px 18px 20px;
  border:1px solid var(--hair);
  border-radius:var(--r-md);
  background:linear-gradient(158deg, rgba(37,214,232,.10), rgba(14,21,51,.94) 62%);
}

.page-products .feat-tile--wide{
  grid-column:span 2;
  background:linear-gradient(120deg, rgba(255,122,51,.14), rgba(14,21,51,.94) 58%);
}

.page-products .feat-tile__k{
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  letter-spacing:.14em;
  color:var(--cyan-200);
  text-transform:uppercase;
}

.page-products .feat-tile__v{
  font-family:var(--font-mono);
  font-size:var(--t-xl);
  line-height:1;
  color:var(--white-050);
}

.page-products .feat-tile__v em{
  font-style:normal;
  font-size:.44em;
  margin-left:4px;
  color:var(--cyan-200);
  letter-spacing:.06em;
}

.page-products .feat-tile__u{
  font-size:var(--t-xs);
  line-height:1.6;
  color:var(--slate-300);
}

/* ---------- 主轴切换 ---------- */
.page-products .feat-axis{
  padding:clamp(30px,5vw,62px) 0 clamp(6px,2vw,18px);
}

.page-products .feat-axis__intro{
  max-width:56ch;
  margin:12px 0 24px;
  font-size:var(--t-sm);
  line-height:1.75;
}

.page-products .tabs__nav{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-bottom:18px;
}

.page-products .tabs__panel{
  border:1px solid var(--hair);
  border-radius:var(--r-lg);
  background:var(--panel);
  padding:6px clamp(16px,2.6vw,26px) 18px;
}

.page-products .tabs__panel + .tabs__panel{
  margin-top:14px;
}

.page-products .feat-spec{
  list-style:none;
  margin:0;
  padding:0;
}

.page-products .feat-spec__row{
  display:grid;
  gap:4px;
  padding:14px 0;
  border-bottom:1px dashed var(--hair);
}

.page-products .feat-spec__row:last-child{
  border-bottom:none;
}

.page-products .feat-spec__k{
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  letter-spacing:.12em;
  color:var(--cyan-400);
}

.page-products .feat-spec__v{
  font-size:var(--t-sm);
  line-height:1.7;
  color:var(--white-050);
}

.page-products .feat-axis__link{
  margin:8px 0 0;
  font-size:var(--t-sm);
}

/* ---------- 主体两栏 ---------- */
.page-products .feat-body{
  display:grid;
  gap:clamp(26px,4vw,44px);
  padding-bottom:clamp(46px,7vw,92px);
  padding-top:clamp(26px,4vw,52px);
}

.page-products .feat-rail{
  border-top:1px solid var(--hair);
  padding-top:16px;
}

.page-products .feat-rail__title{
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  letter-spacing:.16em;
  color:var(--cyan-200);
  text-transform:uppercase;
}

.page-products .feat-rail__list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:2px;
}

.page-products .feat-rail__link{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:9px 10px;
  border-radius:var(--r-sm);
  border-left:2px solid transparent;
  color:var(--slate-300);
  text-decoration:none;
  font-size:var(--t-sm);
  transition:background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

.page-products .feat-rail__link:hover,
.page-products .feat-rail__link:focus-visible{
  background:rgba(37,214,232,.10);
  color:var(--white-050);
}

.page-products .feat-rail__link[aria-current="true"]{
  background:rgba(37,214,232,.14);
  border-left-color:var(--lime-400);
  color:var(--white-050);
}

.page-products .feat-rail__no{
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  letter-spacing:.1em;
  color:var(--cyan-400);
}

.page-products .feat-rail__chips{
  margin-top:24px;
  padding-top:18px;
  border-top:1px dashed var(--hair);
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}

.page-products .feat-rail__chips .feat-rail__title{
  flex:0 0 100%;
}

.page-products .feat-chip{
  display:inline-block;
  padding:6px 12px;
  border:1px solid var(--hair);
  border-radius:var(--pill);
  font-size:var(--t-xs);
  color:var(--cyan-200);
  text-decoration:none;
  transition:border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-products .feat-chip:hover,
.page-products .feat-chip:focus-visible{
  border-color:var(--cyan-400);
  background:rgba(37,214,232,.10);
}

/* ---------- 章节 ---------- */
.page-products .feat-chapter{
  padding:clamp(30px,4.6vw,56px) 0;
  border-top:1px solid var(--hair);
}

.page-products .feat-chapter:first-child{
  border-top:none;
  padding-top:0;
}

.page-products .feat-chapter__head{
  display:grid;
  gap:8px;
  max-width:64ch;
}

.page-products .feat-chapter__no{
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  letter-spacing:.22em;
  color:var(--cyan-400);
}

.page-products .feat-chapter__head .section-title{
  margin:0;
}

.page-products .feat-chapter__lede{
  margin:0;
  font-size:var(--t-sm);
  line-height:1.78;
  color:var(--slate-300);
}

.page-products .feat-subhead{
  font-family:var(--font-head);
  font-size:var(--t-md);
  font-weight:400;
  letter-spacing:-.01em;
  color:var(--white-050);
  margin:34px 0 14px;
}

/* ---------- 步骤 ---------- */
.page-products .feat-steps{
  list-style:none;
  margin:24px 0 0;
  padding:0;
  display:grid;
  gap:12px;
}

.page-products .feat-step{
  position:relative;
  padding:20px 22px 20px 24px;
  border:1px solid var(--hair);
  border-radius:var(--r-lg);
  background:var(--panel);
  box-shadow:0 0 0 0 rgba(37,214,232,0);
  transition:border-color .2s var(--ease), box-shadow .2s var(--ease), transform .2s var(--ease);
}

.page-products .feat-step::before{
  content:"";
  position:absolute;
  left:0;
  top:22px;
  bottom:22px;
  width:3px;
  border-radius:var(--pill);
  background:linear-gradient(180deg,var(--cyan-400),var(--lime-400));
}

.page-products .feat-step:hover{
  border-color:var(--cyan-400);
  box-shadow:0 0 0 1px rgba(37,214,232,.22);
  transform:translateY(-2px);
}

.page-products .feat-step__no{
  display:block;
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  letter-spacing:.2em;
  color:var(--cyan-200);
  margin-bottom:6px;
}

.page-products .feat-step__title{
  margin:0 0 8px;
  font-family:var(--font-head);
  font-size:var(--t-md);
  font-weight:400;
  color:var(--white-050);
  letter-spacing:-.01em;
}

.page-products .feat-step p{
  margin:0;
  font-size:var(--t-sm);
  line-height:1.72;
}

/* 注册 / 扫码 布局 */
.page-products .feat-register,
.page-products .feat-scan{
  display:grid;
  gap:22px;
  margin-top:6px;
}

.page-products .feat-register .feat-steps,
.page-products .feat-scan .feat-steps{
  margin-top:18px;
}

.page-products .feat-register__fig,
.page-products .feat-scan__fig{
  margin:0;
}

.page-products .feat-scan__fig{
  max-width:420px;
  justify-self:start;
}

/* 折叠问答 */
.page-products .fold{
  margin-top:34px;
}

.page-products .fold__item{
  border:1px solid var(--hair);
  border-radius:var(--r-md);
  background:var(--ink-900);
  overflow:hidden;
}

.page-products .fold__item + .fold__item{
  margin-top:10px;
}

.page-products .fold__trigger{
  color:var(--white-050);
}

/* 事实条 */
.page-products .feat-facts{
  list-style:none;
  margin:26px 0 0;
  padding:0;
  display:grid;
  gap:10px;
}

.page-products .feat-facts__item{
  padding:16px 18px;
  border:1px solid var(--hair);
  border-radius:var(--r-md);
  background:linear-gradient(100deg, rgba(124,99,255,.10), rgba(14,21,51,.9) 56%);
  font-size:var(--t-sm);
  line-height:1.72;
}

.page-products .feat-facts__k{
  display:inline-block;
  margin-right:10px;
  padding:2px 10px;
  border-radius:var(--pill);
  background:rgba(37,214,232,.14);
  color:var(--cyan-200);
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  letter-spacing:.1em;
}

/* ---------- 索引 ---------- */
.page-products .feat-filters{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin:22px 0 18px;
}

.page-products .feat-filter{
  display:inline-flex;
  align-items:baseline;
  gap:8px;
  padding:9px 16px;
  border:1px solid var(--hair);
  border-radius:var(--pill);
  font-size:var(--t-xs);
  color:var(--slate-300);
  background:rgba(14,21,51,.75);
}

.page-products .feat-filter b{
  color:var(--white-050);
  font-weight:600;
  letter-spacing:.02em;
}

.page-products .feat-map{
  display:grid;
  gap:10px;
}

.page-products .feat-node{
  border:1px solid var(--hair);
  border-radius:var(--r-md);
  background:var(--ink-900);
  overflow:hidden;
  transition:border-color .2s var(--ease);
}

.page-products .feat-node[open]{
  border-color:var(--cyan-400);
  box-shadow:inset 0 0 0 1px rgba(37,214,232,.22);
}

.page-products .feat-node summary{
  display:flex;
  align-items:baseline;
  gap:12px;
  padding:15px 18px;
  cursor:pointer;
  list-style:none;
  color:var(--white-050);
  font-family:var(--font-head);
  font-size:var(--t-md);
  letter-spacing:-.01em;
}

.page-products .feat-node summary::-webkit-details-marker{
  display:none;
}

.page-products .feat-node summary::after{
  content:"+";
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:var(--t-sm);
  color:var(--cyan-400);
}

.page-products .feat-node[open] summary::after{
  content:"−";
  color:var(--lime-400);
}

.page-products .feat-node__count{
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  letter-spacing:.1em;
  color:var(--cyan-200);
}

.page-products .feat-node__body{
  padding:0 18px 16px;
  font-size:var(--t-sm);
  line-height:1.72;
}

.page-products .feat-node__body p{
  margin:0;
}

.page-products .feat-note{
  margin:18px 0 0;
  font-size:var(--t-sm);
  line-height:1.75;
  color:var(--slate-300);
}

.page-products .feat-note--lime{
  padding:12px 16px;
  border-left:3px solid var(--lime-400);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  background:rgba(168,240,60,.08);
  color:var(--white-050);
}

.page-products .feat-index__fig{
  margin:26px 0 0;
}

/* ---------- 设备矩阵 ---------- */
.page-products .feat-devices__fig{
  margin:24px 0;
}

.page-products .feat-table-wrap{
  overflow-x:auto;
  border:1px solid var(--hair);
  border-radius:var(--r-md);
  background:var(--panel);
  -webkit-overflow-scrolling:touch;
}

.page-products .feat-table{
  width:100%;
  min-width:640px;
  border-collapse:collapse;
  font-size:var(--t-sm);
}

.page-products .feat-table__caption{
  caption-side:top;
  text-align:left;
  padding:16px 18px 6px;
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  letter-spacing:.16em;
  color:var(--cyan-200);
}

.page-products .feat-table th,
.page-products .feat-table td{
  text-align:left;
  padding:14px 18px;
  border-bottom:1px solid var(--hair);
  vertical-align:top;
}

.page-products .feat-table thead th{
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  letter-spacing:.12em;
  color:var(--cyan-200);
  font-weight:400;
  white-space:nowrap;
}

.page-products .feat-table tbody th{
  color:var(--white-050);
  font-weight:600;
  white-space:nowrap;
}

.page-products .feat-table tbody tr:last-child th,
.page-products .feat-table tbody tr:last-child td{
  border-bottom:none;
}

.page-products .feat-table tbody tr{
  transition:background-color .18s var(--ease);
}

.page-products .feat-table tbody tr:hover,
.page-products .feat-table tbody tr:focus-within{
  background:rgba(37,214,232,.08);
}

.page-products .feat-table .mono{
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  letter-spacing:.04em;
  color:var(--cyan-200);
  white-space:nowrap;
}

.page-products .feat-dev-note{
  color:var(--slate-300);
  opacity:.72;
  transition:opacity .18s var(--ease), color .18s var(--ease);
}

.page-products .feat-table tbody tr:hover .feat-dev-note,
.page-products .feat-table tbody tr:focus-within .feat-dev-note{
  opacity:1;
  color:var(--white-050);
}

/* ---------- 账号 ---------- */
.page-products .feat-account{
  display:grid;
  gap:24px;
  margin-top:22px;
}

.page-products .feat-account__fig{
  margin:0;
}

.page-products .feat-list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:12px;
}

.page-products .feat-list__item{
  position:relative;
  padding-left:20px;
  font-size:var(--t-sm);
  line-height:1.75;
}

.page-products .feat-list__item::before{
  content:"";
  position:absolute;
  left:0;
  top:9px;
  width:9px;
  height:9px;
  border-radius:50%;
  border:2px solid var(--cyan-400);
}

.page-products .feat-list__item b{
  display:block;
  color:var(--white-050);
  font-weight:600;
  margin-bottom:2px;
}

.page-products .feat-list--plain .feat-list__item::before{
  border-color:var(--orange-500);
}

/* ---------- 速度 ---------- */
.page-products .feat-gauges{
  display:grid;
  gap:20px;
  margin-top:26px;
}

.page-products .feat-gauge__top{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:12px;
  margin-bottom:8px;
}

.page-products .feat-gauge__label{
  font-size:var(--t-sm);
  color:var(--slate-300);
}

.page-products .feat-gauge__value{
  font-family:var(--font-mono);
  font-size:var(--t-sm);
  letter-spacing:.06em;
  color:var(--white-050);
}

.page-products .feat-gauge__track{
  display:block;
  height:9px;
  border-radius:var(--pill);
  background:var(--ink-900);
  border:1px solid var(--hair);
  overflow:hidden;
}

.page-products .feat-gauge__fill{
  display:block;
  height:100%;
  border-radius:var(--pill);
  background:linear-gradient(90deg,var(--cyan-400),var(--cyan-200));
}

.page-products .feat-gauge__fill--a{ width:30%; }
.page-products .feat-gauge__fill--b{ width:40%; }
.page-products .feat-gauge__fill--c{ width:14%; background:linear-gradient(90deg,var(--lime-400),var(--cyan-400)); }
.page-products .feat-gauge__fill--d{ width:52%; background:linear-gradient(90deg,var(--orange-500),var(--cyan-400)); }

/* ---------- 人工协助 ---------- */
.page-products .feat-support{
  display:grid;
  gap:22px;
  margin-top:22px;
  padding:22px;
  border:1px solid var(--hair);
  border-radius:var(--r-lg);
  background:linear-gradient(150deg, rgba(255,122,51,.10), rgba(14,21,51,.94) 58%);
}

.page-products .feat-support__actions{
  display:grid;
  gap:10px;
}

/* ---------- 响应式 ---------- */
@media (min-width:760px){
  .page-products .feat-map{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }

  .page-products .feat-spec__row{
    grid-template-columns:132px minmax(0,1fr);
    gap:14px;
    align-items:baseline;
  }

  .page-products .feat-gauges{
    grid-template-columns:repeat(2,minmax(0,1fr));
    column-gap:34px;
  }

  .page-products .feat-support{
    grid-template-columns:minmax(0,1fr) 208px;
    align-items:center;
  }
}

@media (min-width:900px){
  .page-products .feat-hero__grid{
    grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);
    align-items:end;
  }

  .page-products .feat-register{
    grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
    align-items:start;
  }

  .page-products .feat-scan{
    grid-template-columns:minmax(0,1fr) minmax(0,420px);
    align-items:start;
    gap:34px;
  }

  .page-products .feat-scan__fig{
    justify-self:end;
  }

  .page-products .feat-account{
    grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
    align-items:center;
    gap:34px;
  }

  .page-products .feat-facts{
    grid-template-columns:repeat(3,minmax(0,1fr));
  }
}

@media (min-width:1024px){
  .page-products .feat-body{
    grid-template-columns:var(--rail-col) minmax(0,1fr);
    align-items:start;
  }

  .page-products .feat-rail{
    position:sticky;
    top:calc(var(--topbar-h) + 28px);
    border-top:none;
    border-left:1px solid var(--hair);
    padding:4px 0 4px 22px;
    max-height:calc(100vh - var(--topbar-h) - 56px);
    overflow-y:auto;
  }

  .page-products .feat-map{
    grid-template-columns:repeat(3,minmax(0,1fr));
  }
}

@media (min-width:1240px){
  .page-products .feat-hero__tiles{
    gap:14px;
  }

  .page-products .feat-tile{
    padding:22px 22px 24px;
  }
}

@media (prefers-reduced-motion:reduce){
  .page-products .feat-step,
  .page-products .feat-node,
  .page-products .feat-rail__link,
  .page-products .feat-dev-note,
  .page-products .feat-table tbody tr{
    transition:none;
  }

  .page-products .feat-step:hover{
    transform:none;
  }
}
<<<END>>>