.page-home {
  --home-pad: clamp(56px, 8vw, 112px);
  --home-glow: rgba(255, 106, 26, 0.42);
  position: relative;
  isolation: isolate;
  padding-bottom: clamp(80px, 10vw, 140px);
}

.page-home::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, rgba(35, 38, 47, 0.5) 0 1px, transparent 1px 24px),
    repeating-linear-gradient(90deg, rgba(35, 38, 47, 0.5) 0 1px, transparent 1px 24px);
  opacity: 0.42;
}

.page-home > * {
  position: relative;
  z-index: 1;
}

/* ---------- 面包屑 ---------- */
.page-home .crumb {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 22px var(--gutter) 0;
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.page-home .crumb__sep {
  color: var(--line);
}

/* ---------- 首屏 ---------- */
.page-home .home-hero {
  padding: clamp(24px, 4vw, 48px) 0 clamp(48px, 7vw, 96px);
  overflow: hidden;
}

.page-home .home-hero__shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 5vw, 56px);
  align-items: center;
}

.page-home .home-hero__kicker {
  margin: 0 0 18px;
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  background: rgba(20, 22, 28, 0.6);
}

.page-home .home-hero__title {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 8.4vw, 76px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--paper);
  text-shadow:
    0 0 1px rgba(11, 12, 16, 1),
    0 0 22px rgba(255, 106, 26, 0.24);
}

.page-home .home-hero__lede {
  max-width: 46ch;
  margin: 0 0 30px;
  color: var(--paper-soft);
}

.page-home .home-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 34px;
}

.page-home .home-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin: 0;
  padding: 20px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
}

.page-home .home-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-home .home-hero__facts .mono {
  color: var(--orange);
  font-size: 15px;
  font-weight: 700;
}

.page-home .home-hero__visual {
  position: relative;
  padding-bottom: 44px;
}

.page-home .home-hero__media {
  position: relative;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-home .home-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 90% at 15% 10%, rgba(46, 211, 255, 0.16), transparent 58%),
    radial-gradient(100% 80% at 92% 96%, rgba(255, 106, 26, 0.22), transparent 62%),
    linear-gradient(180deg, rgba(11, 12, 16, 0.1), rgba(11, 12, 16, 0.72));
  pointer-events: none;
}

.page-home .home-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 转轮 ---------- */
.page-home .reel {
  position: absolute;
  left: clamp(10px, 4vw, 28px);
  right: clamp(10px, 4vw, 28px);
  bottom: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.55);
}

.page-home .reel__col {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  min-height: 86px;
  padding: 12px 6px;
  overflow: hidden;
  background: linear-gradient(180deg, var(--surface), var(--ink));
}

.page-home .reel__col::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(
    180deg,
    rgba(11, 12, 16, 0.94) 0%,
    rgba(11, 12, 16, 0.2) 34%,
    rgba(11, 12, 16, 0.2) 66%,
    rgba(11, 12, 16, 0.94) 100%
  );
}

.page-home .reel__ghost {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--muted);
  opacity: 0.5;
}

.page-home .reel__val {
  font-family: var(--font-mono);
  font-size: clamp(14px, 2.1vw, 19px);
  font-weight: 700;
  color: var(--orange);
  white-space: nowrap;
}

.page-home .reel__col--blue .reel__val {
  color: var(--blue);
}

.page-home .reel__col--green .reel__val {
  color: var(--green);
}

/* ---------- 章节通用头 ---------- */
.page-home .home-sec__head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: clamp(32px, 5vw, 56px);
}

.page-home .home-sec__titling {
  max-width: 62ch;
}

.page-home .home-sec__titling .section__title {
  margin: 8px 0 14px;
}

.page-home .home-sec__titling .lede {
  margin: 0;
  color: var(--paper-soft);
}

.page-home .section {
  padding: var(--home-pad) 0 0;
}

.page-home .section__num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(52px, 11vw, 104px);
  line-height: 0.86;
  letter-spacing: -0.04em;
  color: var(--line);
}

.page-home .section__kicker {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-home .section__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1.18;
  color: var(--paper);
}

/* ---------- 01 转轮式横向模块 ---------- */
.page-home .home-rail-sec {
  padding-top: var(--home-pad);
}

.page-home .home-rail {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 6px var(--gutter) 30px;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
  -webkit-overflow-scrolling: touch;
}

.page-home .home-rail::-webkit-scrollbar {
  height: 6px;
}

.page-home .home-rail::-webkit-scrollbar-track {
  background: var(--line);
}

.page-home .home-rail::-webkit-scrollbar-thumb {
  background: var(--orange);
}

.page-home .home-rail__card {
  flex: 0 0 min(310px, 78vw);
  scroll-snap-align: start;
  background: var(--surface);
  border: 1px solid var(--line);
  transition: border-color 120ms var(--ease), transform 120ms var(--ease);
}

.page-home .home-rail__card--wide {
  flex-basis: min(380px, 86vw);
}

.page-home .home-rail__card:hover,
.page-home .home-rail__card:focus-within {
  border-color: var(--orange);
  transform: translateY(-2px);
}

.page-home .home-rail__idx {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-home .home-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 21px;
  line-height: 1.28;
  color: var(--paper);
}

.page-home .home-rail__card .card__body > p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper-soft);
}

.page-home .home-rail__thumb {
  position: relative;
  margin: 4px 0 16px;
  overflow: hidden;
  border: 1px solid var(--line);
  aspect-ratio: 1 / 1;
}

.page-home .home-rail__thumb--wide {
  aspect-ratio: 16 / 9;
}

.page-home .home-rail__thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.05);
}

.page-home .home-rail__meta {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-home .home-rail__link {
  display: inline-block;
  position: relative;
  color: var(--blue);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  padding-bottom: 3px;
}

.page-home .home-rail__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms var(--ease);
}

.page-home .home-rail__link:hover::after,
.page-home .home-rail__link:focus-visible::after {
  transform: scaleX(1);
}

/* ---------- 02 体积 ---------- */
.page-home .home-size__shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
  align-items: center;
}

.page-home .home-size__frame {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--line);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% 100%, 0 100%, 0 var(--cut));
}

.page-home .home-size__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(140deg, rgba(46, 211, 255, 0.14), transparent 52%),
    linear-gradient(0deg, rgba(11, 12, 16, 0.78), rgba(11, 12, 16, 0.08));
  pointer-events: none;
}

.page-home .home-size__frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-home .home-size__cap {
  margin: 14px 0 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-home .home-size__copy .section__title {
  margin: 10px 0 20px;
}

.page-home .home-size__copy .prose p {
  color: var(--paper-soft);
}

.page-home .home-size__copy .btn {
  margin-top: 26px;
}

/* ---------- 03 速度 ---------- */
.page-home .home-speed__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-home .home-speed__cell {
  padding: clamp(22px, 3vw, 32px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 2px solid var(--orange);
}

.page-home .home-speed__cell:nth-child(2) {
  border-top-color: var(--blue);
}

.page-home .home-speed__cell:nth-child(3) {
  border-top-color: var(--green);
}

.page-home .home-speed__num {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(34px, 6vw, 52px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-home .home-speed__cell h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  color: var(--paper);
}

.page-home .home-speed__cell p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 04 更新节奏 ---------- */
.page-home .home-rhythm__lanes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-home .home-lane {
  position: relative;
  padding: clamp(24px, 3.4vw, 36px);
  background: var(--surface);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-home .home-lane::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--orange);
}

.page-home .home-lane--weekly::before {
  background: var(--blue);
}

.page-home .home-lane__stamp {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-home .home-lane--weekly .home-lane__stamp {
  color: var(--blue);
}

.page-home .home-lane__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 3vw, 26px);
  color: var(--paper);
}

.page-home .home-lane__list {
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.page-home .home-lane__list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 10px;
  font-size: 15px;
  line-height: 1.66;
  color: var(--paper-soft);
}

.page-home .home-lane__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 1px;
  background: var(--clay);
}

.page-home .home-lane__go {
  display: inline-block;
  color: var(--blue);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 160ms var(--ease), color 160ms var(--ease);
}

.page-home .home-lane__go:hover,
.page-home .home-lane__go:focus-visible {
  border-bottom-color: currentColor;
}

/* ---------- 05 三步路径 ---------- */
.page-home .home-path {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 0 0 clamp(32px, 5vw, 52px);
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.page-home .home-path__step {
  position: relative;
  padding: clamp(24px, 3.4vw, 34px);
  background: linear-gradient(160deg, rgba(20, 22, 28, 0.96), rgba(11, 12, 16, 0.96));
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
  transition: border-color 120ms var(--ease);
}

.page-home .home-path__step:hover {
  border-color: var(--orange);
}

.page-home .home-path__no {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-home .home-path__step h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  color: var(--paper);
}

.page-home .home-path__step p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--paper-soft);
}

.page-home .home-path__link {
  color: var(--blue);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 160ms var(--ease);
}

.page-home .home-path__link:hover,
.page-home .home-path__link:focus-visible {
  border-bottom-color: currentColor;
}

.page-home .home-help {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  align-items: center;
  padding: clamp(22px, 3vw, 30px);
  border: 1px solid var(--line);
  background: rgba(20, 22, 28, 0.62);
}

.page-home .home-help__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--paper-soft);
}

.page-home .home-help__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 悬浮下载入口 ---------- */
.page-home .home-float {
  position: fixed;
  right: clamp(14px, 3vw, 26px);
  bottom: clamp(84px, 12vw, 30px);
  z-index: 30;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 12px 18px;
  background: var(--orange);
  color: #14100c;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid var(--orange-soft);
  clip-path: polygon(10px 0, 100% 0, 100% 100%, 0 100%, 0 10px);
  box-shadow: 0 12px 30px rgba(255, 106, 26, 0.26);
  transition: transform 140ms var(--ease), box-shadow 140ms var(--ease);
}

.page-home .home-float:hover,
.page-home .home-float:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 16px 36px rgba(255, 106, 26, 0.38);
}

.page-home .home-float__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 3px rgba(155, 255, 77, 0.22);
}

.page-home .home-float__label {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 768px) {
  .page-home .home-sec__head {
    grid-template-columns: auto 1fr;
    gap: clamp(24px, 4vw, 48px);
    align-items: start;
  }

  .page-home .home-speed__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-home .home-rhythm__lanes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .page-home .home-path {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-home .home-path__step:nth-child(2) {
    transform: translateY(20px);
  }

  .page-home .home-help {
    grid-template-columns: 1fr auto;
    gap: 26px;
  }

  .page-home .home-float {
    bottom: 26px;
  }
}

@media (min-width: 1000px) {
  .page-home .home-hero__shell {
    grid-template-columns: 7fr 5fr;
    gap: clamp(36px, 5vw, 72px);
  }

  .page-home .home-hero__visual {
    border-left: 1px solid var(--line);
    padding-left: clamp(20px, 3vw, 36px);
  }

  .page-home .home-hero__visual::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 12%;
    width: 1px;
    height: 42%;
    background: linear-gradient(180deg, transparent, var(--home-glow), transparent);
  }

  .page-home .home-size__shell {
    grid-template-columns: 5fr 6fr;
    gap: clamp(36px, 5vw, 72px);
  }

  .page-home .home-rail__card:nth-child(even) {
    transform: translateY(18px);
  }

  .page-home .home-rail__card:hover,
  .page-home .home-rail__card:focus-within {
    transform: translateY(14px);
  }
}

@media (max-width: 480px) {
  .page-home .reel__ghost {
    display: none;
  }

  .page-home .reel__col {
    min-height: 62px;
  }

  .page-home .home-hero__facts {
    flex-direction: column;
    gap: 8px;
  }

  .page-home .home-float__label {
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .home-rail__card,
  .page-home .home-path__step,
  .page-home .home-float,
  .page-home .home-rail__link::after {
    transition: none;
  }

  .page-home .home-rail__card:hover,
  .page-home .home-rail__card:focus-within,
  .page-home .home-float:hover,
  .page-home .home-float:focus-visible {
    transform: none;
  }
}