.page-home{
  --home-max: var(--measure);
  --home-pad: var(--shell-pad);
  --home-gap: clamp(18px, 3vw, 32px);
  background: var(--paper);
  color: var(--charcoal);
  font-family: var(--font-body);
  font-size: var(--step-2);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-home .home-wrap{
  width: 100%;
  max-width: var(--home-max);
  margin-inline: auto;
  padding-inline: var(--home-pad);
}

.page-home .mono{
  font-family: var(--font-mono);
  letter-spacing: .06em;
}

/* ---------- 封面 ---------- */
.page-home .cover{
  position: relative;
  background: var(--ink-moss);
  color: var(--ink-1);
  padding-top: clamp(28px, 6vw, 76px);
  overflow: hidden;
}

.page-home .cover__grid{
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 56px);
  width: 100%;
  max-width: var(--home-max);
  margin-inline: auto;
  padding-inline: var(--home-pad);
  padding-bottom: clamp(30px, 5vw, 56px);
}

.page-home .cover__grid::before{
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(245,242,233,.09) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(245,242,233,.07) 1px, transparent 1px);
  background-size: 88px 88px;
  opacity: .8;
}

.page-home .cover__main{
  position: relative;
  z-index: 2;
  min-width: 0;
}

.page-home .cover__context{
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 clamp(20px, 3vw, 34px);
  font-size: var(--step-1);
  color: var(--ink-3);
  letter-spacing: .12em;
}

.page-home .cover__context-dash{
  width: 26px;
  height: 1px;
  background: var(--fluoro);
  opacity: .8;
}

.page-home .cover__context-ct{
  color: var(--ink-2);
  letter-spacing: .06em;
}

.page-home .cover__title{
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: .94;
  color: var(--paper);
}

.page-home .cover__title-en{
  display: block;
  font-family: var(--font-mono);
  font-size: var(--step-1);
  font-weight: 500;
  letter-spacing: .32em;
  color: var(--fluoro);
  margin-bottom: 14px;
}

.page-home .cover__title-cn{
  display: block;
  font-size: clamp(40px, 10vw, 64px);
}

.page-home .cover__title-sub{
  display: block;
  margin-top: 8px;
  font-size: clamp(22px, 5.6vw, 44px);
  color: var(--fluoro);
}

.page-home .cover__lead{
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-size: clamp(17px, 2.4vw, var(--step-3));
  line-height: 1.6;
  color: var(--paper);
  max-width: 26em;
}

.page-home .cover__intro{
  margin: 14px 0 0;
  max-width: 44ch;
  color: var(--ink-2);
  font-size: var(--step-2);
}

.page-home .cover__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3.4vw, 36px);
}

.page-home .cover__figure{
  position: relative;
  z-index: 2;
  margin: 0;
  align-self: start;
}

.page-home .cover__figure img{
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line-on-ink);
  background: var(--deep-fern);
}

.page-home .cover__caption{
  display: block;
  margin-top: 10px;
  font-size: var(--step-1);
  letter-spacing: .18em;
  color: var(--ink-3);
}

.page-home .cover__slice{
  display: none;
}

.page-home .cover__anno{
  display: none;
}

.page-home .cover__index{
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  width: 100%;
  max-width: var(--home-max);
  margin-inline: auto;
  padding: 18px var(--home-pad);
  border-top: 1px solid var(--line-on-ink);
}

.page-home .cover__index-label{
  font-size: var(--step-1);
  letter-spacing: .26em;
  color: var(--signal);
}

.page-home .cover__index-list{
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-home .cover__index-link{
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  font-size: var(--step-1);
  color: var(--ink-2);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .24s var(--ease), border-color .24s var(--ease);
}

.page-home .cover__index-link .mono{
  color: var(--fluoro);
  font-size: 11px;
}

.page-home .cover__index-link:hover,
.page-home .cover__index-link:focus-visible{
  color: var(--paper);
  border-bottom-color: var(--signal);
}

/* ---------- 通用分区 ---------- */
.page-home .section{
  padding-block: clamp(46px, 8vw, 96px);
  border-top: 1px solid var(--line-on-paper);
}

.page-home .sec-head{
  display: grid;
  gap: 10px;
  margin-bottom: clamp(26px, 4vw, 46px);
  max-width: 62ch;
}

.page-home .sec-head__title{
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -.01em;
  line-height: 1.16;
  font-size: clamp(26px, 4.6vw, var(--step-4));
  color: var(--charcoal);
}

.page-home .sec-head__note{
  margin: 0;
  font-size: var(--step-2);
  color: var(--rock);
  max-width: 48ch;
}

.page-home .chapter-mark{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--step-1);
}

.page-home .chapter-mark__num{
  font-family: var(--font-mono);
  color: var(--terracotta);
  letter-spacing: .1em;
}

.page-home .chapter-mark__label{
  color: var(--rock);
  letter-spacing: .18em;
}

/* ---------- 路标 ---------- */
.page-home .tasks__list{
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-home .task{
  border-top: 1px solid var(--rock);
  transition: border-color .24s var(--ease);
}

.page-home .task:last-child{
  border-bottom: 1px solid var(--rock);
}

.page-home .task:hover,
.page-home .task:focus-within{
  border-top-color: var(--signal);
}

.page-home .task__link{
  display: block;
  position: relative;
  padding: 22px 0 24px 26px;
  color: inherit;
  text-decoration: none;
}

.page-home .task__num{
  font-size: var(--step-1);
  color: var(--rock);
  letter-spacing: .18em;
}

.page-home .task__dot{
  position: absolute;
  left: 4px;
  top: 30px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--signal);
  transition: transform .24s var(--ease);
}

.page-home .task:hover .task__dot,
.page-home .task:focus-within .task__dot{
  transform: scale(1.5);
}

.page-home .task__title{
  margin: 6px 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--step-3);
  line-height: 1.2;
  color: var(--charcoal);
}

.page-home .task__text{
  margin: 0;
  font-size: var(--step-2);
  color: var(--rock);
  max-width: 36ch;
}

.page-home .task__cta{
  display: inline-block;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: var(--step-1);
  letter-spacing: .08em;
  color: var(--deep-fern);
  border-bottom: 1px solid var(--fluoro);
  padding-bottom: 2px;
}

/* ---------- 双轨道 ---------- */
.page-home .tracks{
  background: var(--mist);
  border-top: 1px solid var(--line-on-paper);
}

.page-home .tracks__board{
  border: 1px solid var(--line-on-paper);
  background: var(--paper);
  padding: clamp(16px, 3vw, 30px);
}

.page-home .tracks__map{
  display: block;
  width: 100%;
  height: auto;
  max-height: 110px;
  margin-bottom: clamp(10px, 2vw, 18px);
}

.page-home .tracks__path{
  fill: none;
  stroke: var(--rock);
  stroke-width: 1;
  stroke-dasharray: 4 6;
  opacity: .55;
}

.page-home .tracks__path--b{
  stroke: var(--deep-fern);
  opacity: .4;
}

.page-home .tracks__node{
  fill: var(--fluoro);
  stroke: var(--deep-fern);
  stroke-width: 1;
}

.page-home .tracks__row{
  display: grid;
  gap: 14px;
  padding: 20px 0;
  border-top: 1px solid var(--line-on-paper);
}

.page-home .tracks__row--alt{
  border-top-style: dashed;
}

.page-home .tracks__tag{
  display: inline-block;
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--deep-fern);
  border: 1px solid var(--line-on-paper);
  padding: 3px 8px;
}

.page-home .tracks__title{
  margin: 10px 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--step-3);
  line-height: 1.2;
}

.page-home .tracks__desc{
  margin: 0;
  font-size: var(--step-2);
  color: var(--rock);
  max-width: 40ch;
}

.page-home .tracks__steps{
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: trackstep;
}

.page-home .tracks__step{
  position: relative;
  padding-left: 26px;
  font-size: var(--step-2);
  color: var(--charcoal);
  counter-increment: trackstep;
}

.page-home .tracks__step::before{
  content: counter(trackstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--fluoro);
}

.page-home .tracks__step::after{
  content: "";
  position: absolute;
  left: 3px;
  top: 20px;
  width: 1px;
  height: calc(100% + 4px);
  background: var(--line-on-paper);
}

.page-home .tracks__step:last-child::after{
  display: none;
}

.page-home .tracks__foot{
  margin-top: clamp(20px, 3vw, 30px);
}

/* ---------- 节拍 ---------- */
.page-home .rhythm__figure{
  margin: 0 0 clamp(24px, 4vw, 40px);
  border: 1px solid var(--line-on-paper);
}

.page-home .rhythm__figure img{
  display: block;
  width: 100%;
  height: auto;
}

.page-home .rhythm__list{
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0 0 0 22px;
  list-style: none;
  border-left: 1px solid var(--line-on-paper);
}

.page-home .rhythm__item{
  position: relative;
  padding: 0 0 26px;
}

.page-home .rhythm__item::before{
  content: "";
  position: absolute;
  left: -26px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--fluoro);
  border: 1px solid var(--deep-fern);
}

.page-home .rhythm__when{
  font-size: var(--step-1);
  color: var(--terracotta);
  letter-spacing: .1em;
}

.page-home .rhythm__what{
  margin: 4px 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--step-3);
  line-height: 1.2;
}

.page-home .rhythm__text{
  margin: 0;
  font-size: var(--step-2);
  color: var(--rock);
  max-width: 34ch;
}

.page-home .rhythm__stats{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(26px, 4vw, 44px);
  background: var(--line-on-paper);
  border: 1px solid var(--line-on-paper);
}

.page-home .rhythm__stat{
  display: grid;
  gap: 4px;
  padding: 16px 14px;
  background: var(--paper);
}

.page-home .rhythm__num{
  font-size: clamp(24px, 4vw, var(--step-4));
  font-weight: 500;
  line-height: 1.1;
  color: var(--deep-fern);
}

.page-home .rhythm__label{
  font-size: var(--step-1);
  color: var(--rock);
  letter-spacing: .04em;
}

/* ---------- 目录 ---------- */
.page-home .chapters__body{
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-home .chapters__list{
  margin: 0;
  padding: 0;
  list-style: none;
  border-bottom: 1px solid var(--line-on-paper);
}

.page-home .chapter-row{
  display: grid;
  grid-template-columns: 44px 1fr auto;
  grid-template-areas:
    "idx name arrow"
    "idx desc desc";
  gap: 2px 14px;
  padding: 18px 2px;
  border-top: 1px solid var(--line-on-paper);
  text-decoration: none;
  color: inherit;
  transition: background-color .24s var(--ease), padding-left .24s var(--ease);
}

.page-home .chapter-row:hover,
.page-home .chapter-row:focus-visible{
  background: var(--mist);
  padding-left: 10px;
}

.page-home .chapter-row__idx{
  grid-area: idx;
  font-size: var(--step-1);
  color: var(--terracotta);
  letter-spacing: .1em;
  padding-top: 4px;
}

.page-home .chapter-row__name{
  grid-area: name;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--step-3);
  line-height: 1.2;
}

.page-home .chapter-row__desc{
  grid-area: desc;
  font-size: var(--step-2);
  color: var(--rock);
}

.page-home .chapter-row__arrow{
  grid-area: arrow;
  font-size: var(--step-2);
  color: var(--deep-fern);
  padding-top: 4px;
}

.page-home .chapters__figure{
  margin: 0;
}

.page-home .chapters__figure img{
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line-on-paper);
}

.page-home .chapters__caption{
  display: block;
  margin-top: 10px;
  font-size: var(--step-1);
  letter-spacing: .18em;
  color: var(--rock);
}

/* ---------- 反馈 ---------- */
.page-home .feedback{
  background: var(--ink-moss);
  color: var(--ink-1);
  border-top: 1px solid var(--line-on-ink);
}

.page-home .feedback .sec-head__title{
  color: var(--paper);
}

.page-home .feedback .sec-head__note{
  color: var(--ink-2);
}

.page-home .chapter-mark--onink .chapter-mark__num{
  color: var(--signal);
}

.page-home .chapter-mark--onink .chapter-mark__label{
  color: var(--ink-3);
}

.page-home .feedback__grid{
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-home .feedback__folds{
  display: grid;
  gap: 0;
  align-content: start;
}

.page-home .feedback .fold{
  border-top: 1px solid var(--line-on-ink);
}

.page-home .feedback .fold:last-child{
  border-bottom: 1px solid var(--line-on-ink);
}

.page-home .feedback .fold__head{
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2px 12px;
  width: 100%;
  padding: 18px 0;
  background: none;
  border: 0;
  text-align: left;
  color: var(--paper);
  cursor: pointer;
  font-family: inherit;
}

.page-home .feedback .fold__head:focus-visible{
  outline: 1px solid var(--fluoro);
  outline-offset: 3px;
}

.page-home .feedback .fold__title{
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--step-3);
  line-height: 1.25;
}

.page-home .feedback .fold__hint{
  grid-column: 1;
  font-size: var(--step-1);
  color: var(--ink-3);
}

.page-home .feedback .fold__icon{
  grid-row: 1 / span 2;
  align-self: center;
  font-family: var(--font-mono);
  font-size: var(--step-3);
  line-height: 1;
  color: var(--signal);
  transition: transform .22s var(--ease);
}

.page-home .feedback .fold[data-open="true"] .fold__icon{
  transform: rotate(45deg);
}

.page-home .feedback .fold__inner{
  padding: 0 0 22px;
  color: var(--ink-2);
  font-size: var(--step-2);
}

.page-home .feedback .fold__inner p{
  margin: 0 0 10px;
  max-width: 46ch;
}

.page-home .feedback .fold__inner p:last-child{
  margin-bottom: 0;
}

.page-home .feedback__req{
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-home .feedback__req li{
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 10px;
  align-items: baseline;
}

.page-home .feedback__req .mono{
  font-size: 11px;
  color: var(--fluoro);
  letter-spacing: .1em;
}

.page-home .feedback__side{
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-home .feedback__figure{
  margin: 0;
  border: 1px solid var(--line-on-ink);
}

.page-home .feedback__figure img{
  display: block;
  width: 100%;
  height: auto;
  background: var(--deep-fern);
}

.page-home .feedback__card{
  border: 1px solid var(--line-on-ink);
  padding: clamp(18px, 3vw, 26px);
  background: rgba(20, 69, 58, .5);
}

.page-home .feedback__card-title{
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--signal);
}

.page-home .feedback__line{
  display: block;
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: var(--step-2);
  color: var(--fluoro);
  text-decoration: none;
  word-break: break-all;
}

.page-home .feedback__line--plain{
  color: var(--paper);
}

.page-home .feedback__line:hover,
.page-home .feedback__line:focus-visible{
  text-decoration: underline;
}

.page-home .feedback__addr{
  margin: 10px 0 0;
  font-size: var(--step-1);
  color: var(--ink-2);
  line-height: 1.7;
}

.page-home .feedback__note{
  margin: 12px 0 18px;
  font-size: var(--step-1);
  color: var(--ink-3);
  line-height: 1.7;
}

/* ---------- 页底条 ---------- */
.page-home .footline{
  background: var(--paper);
  border-top: 1px solid var(--line-on-paper);
}

.page-home .footline__inner{
  display: flex;
  flex-wrap: wrap;
  gap: 8px 26px;
  padding-block: 20px;
}

.page-home .footline__item{
  font-size: var(--step-1);
  letter-spacing: .06em;
  color: var(--rock);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 700px){
  .page-home .rhythm__stats{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-home .chapter-row{
    grid-template-columns: 48px minmax(120px, 1fr) 1.4fr auto;
    grid-template-areas: "idx name desc arrow";
    align-items: baseline;
    gap: 14px;
  }
}

@media (min-width: 900px){
  .page-home .cover__grid{
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-home .cover__slice{
    display: block;
    position: absolute;
    left: -8%;
    right: -8%;
    top: 58%;
    height: 1px;
    background: linear-gradient(90deg, rgba(46,211,192,0), var(--fluoro), rgba(46,211,192,0));
    transform: rotate(-7deg);
    opacity: .75;
    pointer-events: none;
    z-index: 1;
  }

  .page-home .cover__anno{
    display: block;
    position: absolute;
    right: 6px;
    top: 40%;
    transform: rotate(90deg);
    transform-origin: right top;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .34em;
    color: var(--ink-3);
    white-space: nowrap;
    z-index: 2;
  }

  .page-home .cover__figure{
    margin-top: 34px;
  }

  .page-home .tasks__list{
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(20px, 3vw, 38px);
    align-items: start;
  }

  .page-home .task{
    border-top: 1px solid var(--rock);
  }

  .page-home .task:last-child{
    border-bottom: 0;
  }

  .page-home .task:nth-child(2){
    margin-top: 44px;
  }

  .page-home .task:nth-child(3){
    margin-top: 88px;
  }

  .page-home .task__link{
    padding-left: 24px;
  }

  .page-home .sec-head--split{
    display: grid;
    grid-template-columns: 7fr 4fr;
    gap: var(--home-gap);
    align-items: end;
    max-width: none;
  }

  .page-home .sec-head--split .sec-head__note{
    margin-bottom: 4px;
  }

  .page-home .tracks__row{
    grid-template-columns: 5fr 6fr;
    gap: clamp(20px, 4vw, 56px);
    align-items: start;
    padding: 26px 0;
  }

  .page-home .rhythm__list{
    grid-template-columns: repeat(4, minmax(0, 1fr));
    column-gap: clamp(18px, 3vw, 34px);
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--line-on-paper);
  }

  .page-home .rhythm__item{
    padding: 26px 0 0;
  }

  .page-home .rhythm__item::before{
    left: 0;
    top: -5px;
  }

  .page-home .chapters__body{
    grid-template-columns: 7fr 4fr;
    gap: clamp(24px, 3vw, 40px);
    align-items: start;
  }

  .page-home .chapters__figure{
    margin-top: 56px;
  }

  .page-home .feedback__grid{
    grid-template-columns: 7fr 4fr;
    gap: clamp(26px, 4vw, 52px);
    align-items: start;
  }
}

@media (min-width: 1180px){
  .page-home .cover{
    padding-top: 84px;
  }
}
<<<END>>>