.page-home {
  --home-scope: 1;
  --home-mass: clamp(20px, 3vw, 30px);
  display: block;
  background: var(--c-ink);
  color: var(--c-paper);
}

.page-home h1,
.page-home h2,
.page-home h3 {
  margin: 0;
}

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

.page-home .mono {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--c-gray);
}

.page-home .lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(242, 237, 227, .74);
  max-width: 62ch;
}

/* ---------- 首屏 ---------- */

.page-home .hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(28px, 6vw, 64px) var(--gutter) clamp(46px, 8vw, 96px);
}

.page-home .hero__deco {
  position: absolute;
  top: -10%;
  right: -14%;
  bottom: -10%;
  left: 42%;
  background: linear-gradient(155deg, var(--c-slate) 0%, #14212d 54%, #0d1a25 100%);
  clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 100%);
  z-index: -1;
  pointer-events: none;
}

.page-home .hero__deco::before {
  content: "";
  position: absolute;
  left: 29.2%;
  top: -6%;
  bottom: -6%;
  width: 2px;
  background: linear-gradient(180deg,
    rgba(47, 216, 198, 0) 0%,
    var(--c-cyan) 30%,
    var(--c-cyan) 70%,
    rgba(47, 216, 198, 0) 100%);
  transform: skewX(-11deg);
  opacity: .8;
}

.page-home .hero__inner {
  display: grid;
  gap: clamp(30px, 5vw, 58px);
  max-width: var(--shell-max);
  margin: 0 auto;
}

.page-home .hero__left,
.page-home .hero__right {
  min-width: 0;
}

.page-home .hero__left {
  display: grid;
  gap: clamp(16px, 2.6vw, 26px);
  align-content: start;
}

.page-home .hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 8vw, 62px);
  line-height: 1;
  letter-spacing: -.025em;
  max-width: 14ch;
}

.page-home .vs {
  display: grid;
  gap: clamp(10px, 1.8vw, 16px);
  padding-left: clamp(14px, 2.2vw, 20px);
  border-left: 2px solid var(--c-amber);
}

.page-home .vs__hint {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--c-gray);
}

.page-home .vs__nums {
  display: flex;
  align-items: flex-end;
  gap: clamp(12px, 3vw, 26px);
}

.page-home .vs__num {
  display: grid;
  gap: 6px;
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-home .vs__num:hover,
.page-home .vs__num:focus-visible {
  transform: translateY(-3px);
}

.page-home .vs__digit {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(74px, 20vw, 150px);
  line-height: .78;
  letter-spacing: -.05em;
}

.page-home .vs__num--old .vs__digit {
  color: var(--c-clay);
}

.page-home .vs__num--new .vs__digit {
  color: var(--c-orange);
}

.page-home .vs__cap {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--c-gray);
}

.page-home .vs__mid {
  width: 1px;
  height: clamp(58px, 14vw, 104px);
  margin-bottom: 22px;
  background: linear-gradient(180deg,
    rgba(255, 196, 92, 0) 0%,
    var(--c-amber) 45%,
    rgba(255, 196, 92, 0) 100%);
}

.page-home .vs__panels {
  display: grid;
  gap: 8px;
}

.page-home .vs__panel {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(242, 237, 227, .68);
  max-width: 48ch;
}

.page-home .hero__intro {
  margin: 0;
  font-size: clamp(16px, 1.7vw, 17.5px);
  line-height: 1.78;
  color: rgba(242, 237, 227, .86);
  max-width: 46ch;
}

.page-home .hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 4px;
}

.page-home .hero__right {
  position: relative;
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-home .hero__fig {
  margin: 0;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  aspect-ratio: 4 / 3;
  background: var(--c-slate);
}

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

.page-home .hero__tape {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-ink);
  background: var(--c-amber);
  padding: 5px 10px;
  transform: rotate(-1.4deg);
}

/* ---------- 章节骨架 ---------- */

.page-home .section {
  display: grid;
  gap: clamp(22px, 3.4vw, 36px);
  max-width: calc(var(--shell-max) + var(--gutter) * 2);
  margin: 0 auto;
  padding: clamp(48px, 7vw, 88px) var(--gutter);
}

.page-home .section__head {
  display: flex;
  gap: clamp(12px, 2.4vw, 24px);
  align-items: flex-start;
}

.page-home .section__index {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--c-orange);
  padding-top: .7em;
}

.page-home .section__lead {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.page-home .section__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 4.2vw, 42px);
  line-height: 1.08;
  letter-spacing: -.02em;
}

/* ---------- 三条路径 ---------- */

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

.page-home .steps {
  display: grid;
  gap: clamp(18px, 3vw, 26px);
}

.page-home .step {
  position: relative;
  display: grid;
  gap: 12px;
  align-content: start;
  min-width: 0;
  padding: clamp(20px, 3vw, 28px);
  background: linear-gradient(180deg, rgba(29, 44, 58, .92) 0%, rgba(15, 25, 35, .96) 100%);
  border: 1px solid var(--line);
  border-top: 3px solid var(--c-cyan);
  box-shadow: 0 20px 44px -30px rgba(0, 0, 0, .95);
}

.page-home .step--2 {
  border-top-color: var(--c-orange);
}

.page-home .step--3 {
  border-top-color: var(--c-amber);
}

.page-home .step__tag {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--c-cyan);
  border: 1px solid rgba(47, 216, 198, .42);
  padding: 3px 8px;
}

.page-home .step__tag--orange {
  color: var(--c-orange);
  border-color: rgba(255, 106, 43, .45);
}

.page-home .step__tag--amber {
  color: var(--c-amber);
  border-color: rgba(255, 196, 92, .45);
}

.page-home .step__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.6vw, 25px);
  line-height: 1.18;
  letter-spacing: -.01em;
}

.page-home .step__body {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.76;
  color: rgba(242, 237, 227, .8);
}

.page-home .step__route {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding-top: 4px;
  font-size: 12.5px;
  color: var(--c-gray);
}

.page-home .step__arrow {
  color: var(--c-orange);
}

.page-home .step__fig {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-home .step__fig img {
  width: 100%;
  object-fit: cover;
}

.page-home .step .btn {
  justify-self: start;
}

@media (min-width: 780px) {
  .page-home .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
    padding-bottom: 64px;
  }

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

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

/* ---------- 目录速览 ---------- */

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

.page-home .catalog__grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
}

.page-home .toc {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}

.page-home .toc__item {
  border-bottom: 1px solid var(--line);
}

.page-home .toc__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  gap: clamp(10px, 2vw, 18px);
  align-items: center;
  width: 100%;
  padding: clamp(13px, 2vw, 17px) 4px;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background var(--dur) var(--ease);
}

.page-home .toc__head:hover,
.page-home .toc__head:focus-visible {
  background: rgba(47, 216, 198, .05);
}

.page-home .toc__num {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--c-amber);
}

.page-home .toc__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.2vw, 21px);
  letter-spacing: -.01em;
}

.page-home .toc__count {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--c-gray);
  white-space: nowrap;
}

.page-home .toc__mark {
  width: 8px;
  height: 8px;
  border-right: 1.5px solid var(--c-cyan);
  border-bottom: 1.5px solid var(--c-cyan);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform var(--dur) var(--ease);
}

.page-home .toc__item.is-open .toc__mark {
  transform: rotate(-135deg) translate(-2px, -2px);
}

.page-home .toc__panel {
  padding: 0 4px clamp(14px, 2vw, 18px);
}

.page-home .toc__panel p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: rgba(242, 237, 227, .66);
  max-width: 56ch;
}

.page-home .catalog__side {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-home .side-fig {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: var(--c-slate);
}

.page-home .side-fig img {
  width: 100%;
  object-fit: cover;
}

.page-home .side-note {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid rgba(47, 216, 198, .5);
  font-size: 14px;
  line-height: 1.74;
  color: var(--c-gray);
}

@media (min-width: 940px) {
  .page-home .catalog__grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, .86fr);
    align-items: start;
  }

  .page-home .catalog__side {
    position: sticky;
    top: 92px;
  }
}

/* ---------- 版本与更新 ---------- */

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

.page-home .version__grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
}

.page-home .version__text {
  display: grid;
  gap: 16px;
  align-content: start;
  min-width: 0;
}

.page-home .version__text p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(242, 237, 227, .8);
  max-width: 58ch;
}

.page-home .version__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  padding-top: 4px;
}

.page-home .version__link {
  font-size: 14px;
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 216, 198, .4);
  padding-bottom: 2px;
}

.page-home .version__link:hover,
.page-home .version__link:focus-visible {
  border-bottom-color: var(--c-cyan);
}

.page-home .version__fig {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: var(--c-slate);
}

.page-home .version__fig img {
  width: 100%;
  object-fit: cover;
}

@media (min-width: 880px) {
  .page-home .version__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
    align-items: center;
  }
}

/* ---------- 老用户 ---------- */

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

.page-home .regulars__grid {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-home .regulars__main {
  display: grid;
  gap: 16px;
  align-content: start;
  min-width: 0;
}

.page-home .regulars__main p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(242, 237, 227, .82);
  max-width: 60ch;
}

.page-home .questions {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-home .questions li {
  position: relative;
  padding-left: 22px;
  font-size: 15.5px;
  line-height: 1.66;
  color: rgba(242, 237, 227, .9);
}

.page-home .questions li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 10px;
  height: 2px;
  background: var(--c-orange);
}

.page-home .regulars__cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  padding-top: 4px;
}

.page-home .regulars__link {
  font-size: 14px;
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 216, 198, .4);
  padding-bottom: 2px;
}

.page-home .regulars__link:hover,
.page-home .regulars__link:focus-visible {
  border-bottom-color: var(--c-cyan);
}

.page-home .regulars__aside {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 4px 0 4px 18px;
  border-left: 2px solid var(--c-amber);
}

.page-home .regulars__aside p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--c-gray);
  max-width: 42ch;
}

.page-home .aside__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--c-amber);
}

.page-home .aside__stamp {
  padding-top: 4px;
}

@media (min-width: 860px) {
  .page-home .regulars__grid {
    grid-template-columns: minmax(0, 1.28fr) minmax(0, .72fr);
    align-items: start;
  }
}

/* ---------- 收尾灯带 ---------- */

.page-home .lamp-line {
  margin: 0 var(--gutter);
}

/* ---------- 窄屏收口 ---------- */

@media (max-width: 899px) {
  .page-home .hero__deco {
    top: 36%;
    left: -22%;
    right: -26%;
    bottom: -8%;
    clip-path: polygon(0 20%, 100% 0, 100% 100%, 0 100%);
  }

  .page-home .hero__deco::before {
    display: none;
  }
}

@media (max-width: 520px) {
  .page-home .section__head {
    flex-direction: column;
    gap: 6px;
  }

  .page-home .section__index {
    padding-top: 0;
  }

  .page-home .vs__num--old .vs__digit,
  .page-home .vs__num--new .vs__digit {
    font-size: clamp(64px, 24vw, 108px);
  }

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

  .page-home .toc__head {
    grid-template-columns: auto minmax(0, 1fr) auto;
  }
}