.page-home{
  --home-pad: clamp(18px, 5vw, 52px);
  --home-gap: clamp(24px, 4vw, 48px);
  position: relative;
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.75;
  overflow-x: hidden;
  background:
    radial-gradient(680px 380px at 92% -4%, rgba(255,106,44,.18), transparent 64%),
    radial-gradient(560px 340px at 6% 10%, rgba(34,224,214,.12), transparent 68%),
    var(--ink);
}
.page-home::before{
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(30,58,95,.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30,58,95,.35) 1px, transparent 1px);
  background-size: 96px 96px;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,.85), rgba(0,0,0,.22) 55%, transparent);
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.85), rgba(0,0,0,.22) 55%, transparent);
}
.page-home img{max-width: 100%}
.page-home a:focus-visible{
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}
.page-home .mono{
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}
.page-home .ts{
  border-bottom: 1px dashed rgba(34,224,214,.55);
  cursor: help;
}

/* ===== 面包屑 ===== */
.page-home .breadcrumbs{
  position: relative;
  z-index: 2;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px var(--home-pad) 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}
.page-home .breadcrumbs a{
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-home .breadcrumbs a:hover,
.page-home .breadcrumbs a:focus-visible{
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ===== 首屏 ===== */
.page-home .hero{
  position: relative;
  z-index: 1;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(26px, 5vw, 60px) var(--home-pad) clamp(44px, 7vw, 96px);
}
.page-home .hero-grid{
  display: grid;
  gap: var(--home-gap);
  align-items: start;
}
.page-home .hero-rail{display: none}
.page-home .hero-kicker{
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan);
}
.page-home .hero-copy h1{
  margin: 0;
  font-size: clamp(32px, 7.4vw, 68px);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--text);
  text-wrap: balance;
}
.page-home .hero-copy h1 .hl{
  color: var(--orange);
}
.page-home .hero-lede{
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: 15.5px;
  color: var(--muted);
}
.page-home .hero-actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.page-home .hero-facts{
  display: flex;
  flex-wrap: wrap;
  gap: clamp(16px, 4vw, 40px);
  margin: 28px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.page-home .hero-facts li{
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.page-home .fact-num{
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--amber);
  line-height: 1;
}
.page-home .fact-txt{
  font-size: 13px;
  color: var(--muted);
}
.page-home .hero-status{
  position: relative;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(15,33,56,.96), rgba(14,42,51,.86));
  box-shadow: 0 30px 60px -34px rgba(0,0,0,.95);
}
.page-home .hero-status::after{
  content: "";
  position: absolute;
  inset: 8px -8px -8px 8px;
  z-index: -1;
  border: 1px solid rgba(30,58,95,.7);
  border-radius: var(--radius-lg);
  pointer-events: none;
}
.page-home .status-head{
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--cyan);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.page-home .hero-status .status-dot{
  flex: none;
  width: 8px;
  height: 8px;
  margin-top: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(34,224,214,.16);
  animation: home-pulse 4s ease-in-out infinite;
}
.page-home .status-fields{
  margin: 14px 0 0;
  display: grid;
  gap: 10px;
}
.page-home .status-fields > div{
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
}
.page-home .status-fields dt{
  font-size: 12.5px;
  color: var(--muted);
}
.page-home .status-fields dd{
  margin: 0;
  font-size: 13.5px;
  color: var(--text);
}
.page-home .status-link{
  display: inline-block;
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255,106,44,.4);
}
.page-home .status-link:hover,
.page-home .status-link:focus-visible{
  border-bottom-color: var(--orange);
}
.page-home .hero-visual{
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
}
.page-home .hero-visual img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ===== 章节骨架 ===== */
.page-home .board{
  position: relative;
  z-index: 1;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--home-pad);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}
.page-home .board-main{grid-column: 1; min-width: 0}
.page-home .chapter{
  padding: clamp(46px, 8vw, 100px) 0 clamp(40px, 6vw, 76px);
}
.page-home .chapter-head{
  display: grid;
  gap: 10px;
  margin-bottom: clamp(26px, 4vw, 46px);
}
.page-home .chapter-num{
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(56px, 13vw, 132px);
  line-height: .78;
  font-weight: 700;
  letter-spacing: -.04em;
  color: rgba(232,238,247,.05);
  -webkit-text-stroke: 1px rgba(34,224,214,.4);
}
.page-home .chapter-kicker{
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--orange);
}
.page-home .chapter-title{
  margin: 0;
  font-size: clamp(23px, 3.6vw, 38px);
  line-height: 1.2;
  font-weight: 800;
  color: var(--text);
}
.page-home .chapter-lede{
  margin: 12px 0 0;
  max-width: 54ch;
  font-size: 15px;
  color: var(--muted);
}
.page-home .cut{
  height: 10px;
  border-radius: 2px;
  background: repeating-linear-gradient(115deg, rgba(34,224,214,.36) 0 2px, transparent 2px 12px);
  opacity: .55;
}

/* ===== C01 三条主线 ===== */
.page-home .lane-grid{
  display: grid;
  gap: 18px;
}
.page-home .lane{
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
}
.page-home .lane::before{
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--lane-color, var(--orange));
}
.page-home .lane::after{
  content: "";
  position: absolute;
  right: -50px;
  bottom: -70px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--lane-glow, rgba(255,106,44,.3)), transparent 70%);
  pointer-events: none;
}
.page-home .lane--login{--lane-color: var(--orange); --lane-glow: rgba(255,106,44,.3)}
.page-home .lane--index{--lane-color: var(--cyan); --lane-glow: rgba(34,224,214,.28)}
.page-home .lane--roster{--lane-color: var(--amber); --lane-glow: rgba(255,194,75,.26)}
.page-home .lane-tag{
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--lane-color, var(--orange));
}
.page-home .lane h3{
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
}
.page-home .lane p{
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}
.page-home .lane-link{
  position: relative;
  z-index: 1;
  margin-top: 6px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--lane-color, var(--cyan));
  text-decoration: none;
}
.page-home .lane-link::after{
  content: "→";
  transition: transform .2s ease;
}
.page-home .lane-link:hover::after,
.page-home .lane-link:focus-visible::after{
  transform: translateX(4px);
}

/* ===== C02 换设备 ===== */
.page-home .switch-grid{
  display: grid;
  gap: var(--home-gap);
  align-items: start;
}
.page-home .steps{
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
}
.page-home .steps li{
  position: relative;
  padding: 0 0 24px 52px;
  counter-increment: step;
}
.page-home .steps li::before{
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
}
.page-home .steps li::after{
  content: "";
  position: absolute;
  left: 16px;
  top: 38px;
  bottom: 0;
  width: 1px;
  background: repeating-linear-gradient(to bottom, rgba(34,224,214,.45) 0 4px, transparent 4px 10px);
}
.page-home .steps li:last-child{padding-bottom: 0}
.page-home .steps li:last-child::after{display: none}
.page-home .steps h3{
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}
.page-home .steps p{
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}
.page-home .switch-visual{
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
}
.page-home .switch-visual img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-home .switch-visual figcaption{
  padding: 11px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ===== C03 索引状态 ===== */
.page-home .index-board{
  position: relative;
  overflow: hidden;
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  padding: clamp(22px, 4vw, 38px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, rgba(14,42,51,.94), rgba(15,33,56,.97));
}
.page-home .index-glow{
  position: absolute;
  inset: 0;
  z-index: 0;
  margin: 0;
  pointer-events: none;
}
.page-home .index-glow img{
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .16;
}
.page-home .index-clock,
.page-home .index-meta{
  position: relative;
  z-index: 1;
}
.page-home .index-clock{
  display: grid;
  gap: 6px;
  align-content: start;
}
.page-home .clock-label{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--muted);
}
.page-home .clock-num{
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(38px, 8vw, 68px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--cyan);
}
.page-home .clock-sub{
  font-size: 13px;
  color: var(--muted);
}
.page-home .index-meta{
  margin: 0;
  display: grid;
  gap: 0;
}
.page-home .index-meta > div{
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(30,58,95,.9);
}
.page-home .index-meta > div:last-child{border-bottom: 0}
.page-home .index-meta dt{
  font-size: 13px;
  color: var(--muted);
}
.page-home .index-meta dd{
  margin: 0;
  font-size: 14px;
  color: var(--text);
  text-align: right;
}
.page-home .index-foot{
  margin: 20px 0 0;
  font-size: 13.5px;
  color: var(--muted);
}
.page-home .index-foot a{
  margin-left: 8px;
  color: var(--orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255,106,44,.4);
}
.page-home .index-foot a:hover,
.page-home .index-foot a:focus-visible{
  border-bottom-color: var(--orange);
}

/* ===== C04 服务节点 ===== */
.page-home .node-grid{
  display: grid;
  gap: var(--home-gap);
  align-items: center;
}
.page-home .node-visual{
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--teal);
}
.page-home .node-visual img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-home .node-list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}
.page-home .node-list li{
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  color: var(--muted);
}
.page-home .node-list li::before{
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--orange);
  opacity: .85;
}
.page-home .node-list strong{
  display: block;
  margin-bottom: 2px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}
.page-home .node-link{
  display: inline-block;
  margin-top: 22px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34,224,214,.45);
}
.page-home .node-link:hover,
.page-home .node-link:focus-visible{
  border-bottom-color: var(--cyan);
}

/* ===== C05 下一步 ===== */
.page-home .next-grid{
  display: grid;
  gap: 16px;
}
.page-home .next-card{
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(15,33,56,.72);
  color: var(--text);
  text-decoration: none;
  transition: transform .25s ease, border-color .25s ease, background .25s ease;
}
.page-home .next-card:hover,
.page-home .next-card:focus-visible{
  transform: translateY(-4px);
  border-color: var(--orange);
  background: rgba(15,33,56,.96);
}
.page-home .next-tag{
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .22em;
  color: var(--amber);
}
.page-home .next-card strong{
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
}
.page-home .next-go{
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--cyan);
}
.page-home .next-card:hover .next-go{color: var(--orange)}

/* ===== 章节目录 ===== */
.page-home .chapter-dir{display: none}

/* ===== 返回顶部 ===== */
.page-home .to-top{
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 30;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  width: 52px;
  padding: 10px 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(10,22,40,.92);
  color: var(--muted);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 10px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity .25s ease, transform .25s ease, color .2s ease, border-color .2s ease;
}
.page-home .to-top[data-visible]{
  opacity: 1;
  pointer-events: auto;
  transform: none;
}
.page-home .to-top:hover,
.page-home .to-top:focus-visible{
  color: var(--orange);
  border-color: var(--orange);
}
.page-home .to-top-arrow{
  font-size: 14px;
  line-height: 1;
}
.page-home .to-top-pct{
  font-variant-numeric: tabular-nums;
  letter-spacing: .04em;
}

/* ===== 动效 ===== */
@keyframes home-pulse{
  0%, 100%{opacity: 1}
  50%{opacity: .35}
}
@keyframes home-rise{
  from{opacity: 0; transform: translateY(24px)}
  to{opacity: 1; transform: none}
}
@supports (animation-timeline: view()){
  .page-home .chapter-num,
  .page-home .chapter-title{
    animation: home-rise .8s linear both;
    animation-timeline: view();
    animation-range: entry 0% cover 28%;
  }
}

/* ===== 断点 ===== */
@media (min-width: 640px){
  .page-home .lane-grid{grid-template-columns: repeat(2, minmax(0, 1fr))}
  .page-home .next-grid{grid-template-columns: repeat(2, minmax(0, 1fr))}
}

@media (min-width: 820px){
  .page-home .index-board{grid-template-columns: minmax(0,.9fr) minmax(0,1.1fr); align-items: center}
}

@media (min-width: 900px){
  .page-home .switch-grid{grid-template-columns: minmax(0,1.05fr) minmax(0,.95fr)}
  .page-home .node-grid{grid-template-columns: minmax(0,1fr) minmax(0,1fr)}
  .page-home .lane-grid{grid-template-columns: repeat(3, minmax(0, 1fr))}
  .page-home .next-grid{grid-template-columns: repeat(3, minmax(0, 1fr))}
  .page-home .chapter-head{
    grid-template-columns: auto minmax(0, 1fr);
    align-items: end;
    column-gap: clamp(20px, 3vw, 44px);
  }
  .page-home .chapter-num{align-self: end}
}

@media (min-width: 960px){
  .page-home .hero-grid{
    grid-template-columns: 56px minmax(0, 1.3fr) minmax(280px, 340px);
    grid-template-areas:
      "rail copy status"
      "rail visual status";
    column-gap: clamp(20px, 3vw, 44px);
    row-gap: clamp(20px, 3vw, 32px);
  }
  .page-home .hero-rail{
    grid-area: rail;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    align-self: stretch;
    padding-top: 10px;
  }
  .page-home .hero-rail .rail-text{
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .32em;
    color: var(--muted);
  }
  .page-home .hero-rail .rail-ticks{
    flex: 1;
    width: 1px;
    min-height: 200px;
    background: repeating-linear-gradient(to bottom, var(--line) 0 1px, transparent 1px 14px);
  }
  .page-home .hero-copy{grid-area: copy}
  .page-home .hero-status{grid-area: status; align-self: start}
  .page-home .hero-visual{
    grid-area: visual;
    margin-left: -28px;
    box-shadow: 0 40px 70px -46px rgba(0,0,0,.95);
  }
}

@media (min-width: 1100px){
  .page-home .board{
    grid-template-columns: minmax(0, 1fr) 152px;
    column-gap: clamp(24px, 3vw, 48px);
  }
  .page-home .chapter-dir{
    display: block;
    grid-column: 2;
    position: sticky;
    top: 32px;
    align-self: start;
    padding: 16px 14px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(15,33,56,.6);
  }
  .page-home .dir-title{
    margin: 0 0 10px;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .3em;
    color: var(--muted);
  }
  .page-home .chapter-dir ul{
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 2px;
  }
  .page-home .chapter-dir a{
    display: flex;
    align-items: baseline;
    gap: 8px;
    padding: 6px 6px;
    border-left: 2px solid transparent;
    color: var(--muted);
    text-decoration: none;
    font-size: 12px;
    transition: color .2s ease, border-color .2s ease;
  }
  .page-home .chapter-dir .dir-num{
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .04em;
  }
  .page-home .chapter-dir a:hover{color: var(--text)}
  .page-home .chapter-dir a.is-current,
  .page-home .chapter-dir a[aria-current]{
    color: var(--orange);
    border-left-color: var(--orange);
  }
}

@media (prefers-reduced-motion: reduce){
  .page-home .hero-status .status-dot,
  .page-home .chapter-num,
  .page-home .chapter-title{
    animation: none;
  }
  .page-home .next-card{transition: none}
  .page-home .to-top{transition: opacity .01s linear}
}
<<<END>>>